close #296.

Closes #175

.drone.star

@@ -14,17 +14,18 @@ windowsglobalimage="cppalliance/dronevs2019"
 
 def main(ctx):
   return [
-    #freebsd_cxx("FreeBSD", "g++10",  packages="g++10",  buildtype="boost", buildscript="drone",                                                environment={ "VARIANT": "release", "TOOLSET": "gcc", "COMPILER": "g++", "CXXSTD": "11" }, globalenv=globalenv),
-  linux_cxx("docs", "", packages="docbook docbook-xml docbook-xsl xsltproc libsaxonhe-java default-jre-headless flex libfl-dev bison unzip rsync mlocate", image="cppalliance/droneubuntu1804:1", buildtype="docs", buildscript="drone", environment={"COMMENT": "docs"}, globalenv=globalenv),
+  freebsd_cxx("gcc 11 freebsd", "g++-11", buildtype="boost", buildscript="drone", freebsd_version="13.1", environment={'B2_TOOLSET': 'gcc-11', 'B2_CXXSTD': '17,20', 'B2_LINKFLAGS': '-Wl,-rpath=/usr/local/lib/gcc11'}, globalenv=globalenv),
+  freebsd_cxx("clang 14 freebsd", "clang++-14", buildtype="boost", buildscript="drone", freebsd_version="13.1", environment={'B2_TOOLSET': 'clang-14', 'B2_CXXSTD': '17,20'}, globalenv=globalenv),
+  linux_cxx("docs", "", packages="docbook docbook-xml docbook-xsl xsltproc libsaxonhe-java default-jre-headless flex libfl-dev bison unzip rsync", image="cppalliance/droneubuntu1804:1", buildtype="docs", buildscript="drone", environment={"COMMENT": "docs"}, globalenv=globalenv),
   linux_cxx("asan",         "g++-8",  packages="g++-8",  buildtype="boost", buildscript="drone", image=linuxglobalimage,                        environment={'COMMENT': 'asan',  'B2_VARIANT': 'debug', 'B2_TOOLSET': 'gcc-8',  'B2_CXXSTD': '11', 'B2_ASAN':  '1', 'B2_DEFINES': 'BOOST_NO_STRESS_TEST=1', 'DRONE_EXTRA_PRIVILEGED': 'True', 'DRONE_JOB_UUID': '356a192b79'}, globalenv=globalenv, privileged=True),
   linux_cxx("ubsan",        "g++-8",  packages="g++-8",  buildtype="boost", buildscript="drone", image=linuxglobalimage,                        environment={'COMMENT': 'ubsan', 'B2_VARIANT': 'debug', 'B2_TOOLSET': 'gcc-8',  'B2_CXXSTD': '11', 'B2_UBSAN': '1', 'B2_DEFINES': 'BOOST_NO_STRESS_TEST=1', 'B2_LINKFLAGS': '-fuse-ld=gold',  'DRONE_JOB_UUID': '77de68daec'}, globalenv=globalenv),
   linux_cxx("gcc 11 arm64", "g++-11", packages="g++-11", buildtype="boost", buildscript="drone", image="cppalliance/droneubuntu2004:multiarch", environment={                                           'B2_TOOLSET': 'gcc-11', 'B2_CXXSTD': '11',                                                                                            'DRONE_JOB_UUID': '17ba079169m'}, arch="arm64", globalenv=globalenv),
-  linux_cxx("GCC 10, Debug + Coverage", "g++-10", packages="g++-10 libssl-dev libffi-dev binutils-gold gdb mlocate", 
+  linux_cxx("GCC 10, Debug + Coverage", "g++-10", packages="g++-10 libssl-dev libffi-dev binutils-gold gdb",
                                                                                                  image="cppalliance/droneubuntu2004:1", buildtype="boost", buildscript="drone", environment={"GCOV": "gcov-10", "LCOV_VERSION": "1.15", "VARIANT": "process_coverage", "TOOLSET": "gcc", "COMPILER": "g++-10", "CXXSTD": "11", "DRONE_BEFORE_INSTALL" : "process_coverage", "CODECOV_TOKEN": {"from_secret": "codecov_token"}}, globalenv=globalenv, privileged=True),
   # A set of jobs based on the earlier .travis.yml configuration:
-  linux_cxx("Default clang++ with libc++", "clang++-libc++", packages="libc++-dev mlocate", image="cppalliance/droneubuntu1604:1", buildtype="buildtype", buildscript="drone", environment={ "B2_TOOLSET": "clang-7", "B2_CXXSTD": "11", "VARIANT": "debug", "TOOLSET": "clang", "COMPILER": "clang++-libc++", "CXXSTD": "11", "CXX_FLAGS": "<cxxflags>-stdlib=libc++ <linkflags>-stdlib=libc++", "TRAVISCLANG" : "yes" }, globalenv=globalenv),
-  linux_cxx("Default g++", "g++", packages="mlocate", image="cppalliance/droneubuntu1604:1", buildtype="buildtype", buildscript="drone", environment={ "VARIANT": "release", "TOOLSET": "gcc", "COMPILER": "g++", "CXXSTD": "11" }, globalenv=globalenv),
-  linux_cxx("Clang 3.8, UBasan", "clang++-3.8", packages="clang-3.8 libssl-dev mlocate", llvm_os="precise", llvm_ver="3.8", image="cppalliance/droneubuntu1604:1", buildtype="boost", buildscript="drone", environment={"VARIANT": "process_ubasan", "TOOLSET": "clang", "COMPILER": "clang++-3.8", "CXXSTD": "11", "UBSAN_OPTIONS": 'print_stacktrace=1', "DRONE_BEFORE_INSTALL": "UBasan" }, globalenv=globalenv),
+  linux_cxx("Default clang++ with libc++", "clang++-libc++", packages="libc++-dev", image="cppalliance/droneubuntu1604:1", buildtype="buildtype", buildscript="drone", environment={ "B2_TOOLSET": "clang-7", "B2_CXXSTD": "11", "VARIANT": "debug", "TOOLSET": "clang", "COMPILER": "clang++-libc++", "CXXSTD": "11", "CXX_FLAGS": "<cxxflags>-stdlib=libc++ <linkflags>-stdlib=libc++", "TRAVISCLANG" : "yes" }, globalenv=globalenv),
+  linux_cxx("Default g++", "g++", image="cppalliance/droneubuntu1604:1", buildtype="buildtype", buildscript="drone", environment={ "VARIANT": "release", "TOOLSET": "gcc", "COMPILER": "g++", "CXXSTD": "11" }, globalenv=globalenv),
+  linux_cxx("Clang 3.8, UBasan", "clang++-3.8", packages="clang-3.8 libssl-dev", llvm_os="precise", llvm_ver="3.8", image="cppalliance/droneubuntu1604:1", buildtype="boost", buildscript="drone", environment={"VARIANT": "process_ubasan", "TOOLSET": "clang", "COMPILER": "clang++-3.8", "CXXSTD": "11", "UBSAN_OPTIONS": 'print_stacktrace=1', "DRONE_BEFORE_INSTALL": "UBasan" }, globalenv=globalenv),
   linux_cxx("gcc 6", "g++-6", packages="g++-6", buildtype="boost", buildscript="drone", image=linuxglobalimage, environment={'B2_TOOLSET': 'gcc-6', 'B2_CXXSTD': '11', 'DRONE_JOB_UUID': '902ba3cda1'}, globalenv=globalenv),
   linux_cxx("clang 3.8", "clang++-3.8", packages="clang-3.8", buildtype="boost", buildscript="drone", image="cppalliance/droneubuntu1604:1", environment={'B2_TOOLSET': 'clang', 'COMPILER': 'clang++-3.8', 'B2_CXXSTD': '11', 'DRONE_JOB_UUID': '7b52009b64'}, globalenv=globalenv),
   osx_cxx("clang", "g++", packages="", buildtype="boost",         buildscript="drone", environment={'B2_TOOLSET': 'clang', 'B2_CXXSTD': '11,17', 'DRONE_JOB_UUID': '91032ad7bb'}, globalenv=globalenv),

.github/workflows/ci.yml

@@ -0,0 +1,375 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - develop
+      - feature/**
+
+env:
+  UBSAN_OPTIONS: print_stacktrace=1
+
+jobs:
+  posix:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - toolset: gcc-4.8
+            cxxstd: "11"
+            os: ubuntu-18.04
+            install: g++-4.8
+          - toolset: gcc-5
+            cxxstd: "11,14,1z"
+            os: ubuntu-18.04
+            install: g++-5
+          - toolset: gcc-6
+            cxxstd: "11,14,1z"
+            os: ubuntu-18.04
+            install: g++-6
+          - toolset: gcc-7
+            cxxstd: "11,14,17"
+            os: ubuntu-18.04
+          - toolset: gcc-8
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-18.04
+            install: g++-8
+          - toolset: gcc-9
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-20.04
+          - toolset: gcc-10
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-20.04
+            install: g++-10
+          - toolset: gcc-11
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-20.04
+            install: g++-11
+          - toolset: gcc-12
+            cxxstd: "11,14,17,20,2b"
+            os: ubuntu-22.04
+            install: g++-12
+          - toolset: clang
+            compiler: clang++-3.9
+            cxxstd: "11,14"
+            os: ubuntu-18.04
+            install: clang-3.9
+          - toolset: clang
+            compiler: clang++-4.0
+            cxxstd: "11,14"
+            os: ubuntu-18.04
+            install: clang-4.0
+          - toolset: clang
+            compiler: clang++-5.0
+            cxxstd: "11,14,1z"
+            os: ubuntu-18.04
+            install: clang-5.0
+          - toolset: clang
+            compiler: clang++-6.0
+            cxxstd: "11,14,17"
+            os: ubuntu-18.04
+            install: clang-6.0
+          - toolset: clang
+            compiler: clang++-7
+            cxxstd: "11,14,17"
+            os: ubuntu-18.04
+            install: clang-7
+          - toolset: clang
+            compiler: clang++-8
+            cxxstd: "11,14,17"
+            os: ubuntu-20.04
+            install: clang-8
+          - toolset: clang
+            compiler: clang++-9
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-20.04
+            install: clang-9
+          - toolset: clang
+            compiler: clang++-10
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-20.04
+            install: clang-10
+          - toolset: clang
+            compiler: clang++-11
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-20.04
+            install: clang-11
+          - toolset: clang
+            compiler: clang++-12
+            cxxstd: "11,14,17,2a"
+            os: ubuntu-20.04
+            install: clang-12
+          - toolset: clang
+            compiler: clang++-13
+            cxxstd: "11,14,17,20,2b"
+            os: ubuntu-22.04
+            install: clang-13
+          - toolset: clang
+            compiler: clang++-14
+            cxxstd: "11,14,17,20,2b"
+            os: ubuntu-22.04
+            install: clang-14
+          - toolset: clang
+            cxxstd: "11,14,17,2a"
+            os: macos-11
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install packages
+        if: matrix.install
+        run: sudo apt install ${{matrix.install}}
+
+      - name: Setup Boost
+        run: |
+          echo GITHUB_REPOSITORY: $GITHUB_REPOSITORY
+          LIBRARY=${GITHUB_REPOSITORY#*/}
+          echo LIBRARY: $LIBRARY
+          echo "LIBRARY=$LIBRARY" >> $GITHUB_ENV
+          echo GITHUB_BASE_REF: $GITHUB_BASE_REF
+          echo GITHUB_REF: $GITHUB_REF
+          REF=${GITHUB_BASE_REF:-$GITHUB_REF}
+          REF=${REF#refs/heads/}
+          echo REF: $REF
+          BOOST_BRANCH=develop && [ "$REF" == "master" ] && BOOST_BRANCH=master || true
+          echo BOOST_BRANCH: $BOOST_BRANCH
+          cd ..
+          git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" $LIBRARY
+          ./bootstrap.sh
+          ./b2 -d0 headers
+
+      - name: Create user-config.jam
+        if: matrix.compiler
+        run: |
+          echo "using ${{matrix.toolset}} : : ${{matrix.compiler}} ;" > ~/user-config.jam
+
+      - name: Run tests
+        run: |
+          cd ../boost-root
+          ./b2 -j3 libs/$LIBRARY/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} variant=debug,release
+
+  windows:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - toolset: msvc-14.0
+            cxxstd: "14,latest"
+            addrmd: 32,64
+            os: windows-2019
+          - toolset: msvc-14.2
+            cxxstd: "14,17,20,latest"
+            addrmd: 32,64
+            os: windows-2019
+          - toolset: msvc-14.3
+            cxxstd: "14,17,20,latest"
+            addrmd: 32,64
+            os: windows-2022
+          - toolset: clang-win
+            cxxstd: "14,17,latest"
+            addrmd: 32,64
+            os: windows-2022
+          - toolset: gcc
+            cxxstd: "11,14,17,2a"
+            addrmd: 64
+            os: windows-2019
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Setup Boost
+        shell: cmd
+        run: |
+          echo GITHUB_REPOSITORY: %GITHUB_REPOSITORY%
+          for /f %%i in ("%GITHUB_REPOSITORY%") do set LIBRARY=%%~nxi
+          echo LIBRARY: %LIBRARY%
+          echo LIBRARY=%LIBRARY%>>%GITHUB_ENV%
+          echo GITHUB_BASE_REF: %GITHUB_BASE_REF%
+          echo GITHUB_REF: %GITHUB_REF%
+          if "%GITHUB_BASE_REF%" == "" set GITHUB_BASE_REF=%GITHUB_REF%
+          set BOOST_BRANCH=develop
+          for /f %%i in ("%GITHUB_BASE_REF%") do if "%%~nxi" == "master" set BOOST_BRANCH=master
+          echo BOOST_BRANCH: %BOOST_BRANCH%
+          cd ..
+          git clone -b %BOOST_BRANCH% --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          xcopy /s /e /q %GITHUB_WORKSPACE% libs\%LIBRARY%\
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" %LIBRARY%
+          cmd /c bootstrap
+          b2 -d0 headers
+
+      - name: Run tests
+        shell: cmd
+        run: |
+          cd ../boost-root
+          b2 -j3 libs/%LIBRARY%/test toolset=${{matrix.toolset}} cxxstd=${{matrix.cxxstd}} address-model=${{matrix.addrmd}} variant=debug,release embed-manifest-via=linker
+
+  posix-cmake-subdir:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-18.04
+          - os: ubuntu-20.04
+          - os: ubuntu-22.04
+          - os: macos-11
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install packages
+        if: matrix.install
+        run: sudo apt install ${{matrix.install}}
+
+      - name: Setup Boost
+        run: |
+          echo GITHUB_REPOSITORY: $GITHUB_REPOSITORY
+          LIBRARY=${GITHUB_REPOSITORY#*/}
+          echo LIBRARY: $LIBRARY
+          echo "LIBRARY=$LIBRARY" >> $GITHUB_ENV
+          echo GITHUB_BASE_REF: $GITHUB_BASE_REF
+          echo GITHUB_REF: $GITHUB_REF
+          REF=${GITHUB_BASE_REF:-$GITHUB_REF}
+          REF=${REF#refs/heads/}
+          echo REF: $REF
+          BOOST_BRANCH=develop && [ "$REF" == "master" ] && BOOST_BRANCH=master || true
+          echo BOOST_BRANCH: $BOOST_BRANCH
+          cd ..
+          git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" $LIBRARY
+
+      - name: Use library with add_subdirectory
+        run: |
+          cd ../boost-root/libs/$LIBRARY/test/cmake_subdir_test
+          mkdir __build__ && cd __build__
+          cmake ..
+          cmake --build .
+          ctest --output-on-failure --no-tests=error
+
+  posix-cmake-install:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-18.04
+          - os: ubuntu-20.04
+          - os: ubuntu-22.04
+          - os: macos-11
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install packages
+        if: matrix.install
+        run: sudo apt install ${{matrix.install}}
+
+      - name: Setup Boost
+        run: |
+          echo GITHUB_REPOSITORY: $GITHUB_REPOSITORY
+          LIBRARY=${GITHUB_REPOSITORY#*/}
+          echo LIBRARY: $LIBRARY
+          echo "LIBRARY=$LIBRARY" >> $GITHUB_ENV
+          echo GITHUB_BASE_REF: $GITHUB_BASE_REF
+          echo GITHUB_REF: $GITHUB_REF
+          REF=${GITHUB_BASE_REF:-$GITHUB_REF}
+          REF=${REF#refs/heads/}
+          echo REF: $REF
+          BOOST_BRANCH=develop && [ "$REF" == "master" ] && BOOST_BRANCH=master || true
+          echo BOOST_BRANCH: $BOOST_BRANCH
+          cd ..
+          git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" $LIBRARY
+
+      - name: Configure
+        run: |
+          cd ../boost-root
+          mkdir __build__ && cd __build__
+          cmake -DBOOST_INCLUDE_LIBRARIES=$LIBRARY -DCMAKE_INSTALL_PREFIX=~/.local ..
+
+      - name: Install
+        run: |
+          cd ../boost-root/__build__
+          cmake --build . --target install
+
+      - name: Use the installed library
+        run: |
+          cd ../boost-root/libs/$LIBRARY/test/cmake_install_test && mkdir __build__ && cd __build__
+          cmake -DCMAKE_INSTALL_PREFIX=~/.local ..
+          cmake --build .
+          ctest --output-on-failure --no-tests=error
+
+  posix-cmake-test:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-18.04
+          - os: ubuntu-20.04
+          - os: ubuntu-22.04
+          - os: macos-11
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Install packages
+        if: matrix.install
+        run: sudo apt install ${{matrix.install}}
+
+      - name: Setup Boost
+        run: |
+          echo GITHUB_REPOSITORY: $GITHUB_REPOSITORY
+          LIBRARY=${GITHUB_REPOSITORY#*/}
+          echo LIBRARY: $LIBRARY
+          echo "LIBRARY=$LIBRARY" >> $GITHUB_ENV
+          echo GITHUB_BASE_REF: $GITHUB_BASE_REF
+          echo GITHUB_REF: $GITHUB_REF
+          REF=${GITHUB_BASE_REF:-$GITHUB_REF}
+          REF=${REF#refs/heads/}
+          echo REF: $REF
+          BOOST_BRANCH=develop && [ "$REF" == "master" ] && BOOST_BRANCH=master || true
+          echo BOOST_BRANCH: $BOOST_BRANCH
+          cd ..
+          git clone -b $BOOST_BRANCH --depth 1 https://github.com/boostorg/boost.git boost-root
+          cd boost-root
+          cp -r $GITHUB_WORKSPACE/* libs/$LIBRARY
+          git submodule update --init tools/boostdep
+          python tools/boostdep/depinst/depinst.py --git_args "--jobs 3" $LIBRARY
+
+      - name: Configure
+        run: |
+          cd ../boost-root
+          mkdir __build__ && cd __build__
+          cmake -DBOOST_INCLUDE_LIBRARIES=$LIBRARY -DBUILD_TESTING=ON ..
+
+      - name: Build tests
+        run: |
+          cd ../boost-root/__build__
+          cmake --build . --target tests
+
+      - name: Run tests
+        run: |
+          cd ../boost-root/__build__
+          ctest --output-on-failure --no-tests=error

.gitignore

@@ -31,4 +31,5 @@
 /notes.cpp
 /notes_p.txt
 .settings
+.DS_Store
 

doc/acknowledgements.qbk

@@ -8,4 +8,6 @@ A special thank you goes to [@http://www.intra2net.com/ Intra2net AG] (especiall
 
 Great thanks also goes to Boris Schaeling, who despite having boost.process rejected, went on to work on it and maintained it up until this day and participated in the development of the current version.
 
+Many Thanks, to [@https://github.com/time-killer-games Samuel Venable] for contributing the v2::ext functionality and all the research that went into it.
+
 [endsect]

doc/v2/quickstart.qbk

@@ -1,4 +1,4 @@
-[section:quickstart Quickstrat]
+[section:quickstart Quickstart]
 
 A process needs four things to be launched:
 

include/boost/process/async_pipe.hpp

@@ -26,7 +26,7 @@ namespace boost { namespace process {
 #if defined(BOOST_PROCESS_DOXYGEN)
 
 
-/** Class implementing and asnychronous I/O-Object for use with boost.asio.
+/** Class implementing an asnychronous I/O-Object for use with boost.asio.
  *  It is based on the corresponding I/O Object, that is either boost::asio::windows::stream_handle or
  *  boost::asio::posix::stream_descriptor.
  *

include/boost/process/async_system.hpp

@@ -38,12 +38,11 @@ namespace process {
 namespace detail
 {
 
-template<typename ExitHandler>
+template<typename Handler>
 struct async_system_handler : ::boost::process::detail::api::async_handler
 {
     boost::asio::io_context & ios;
-    boost::asio::async_completion<
-            ExitHandler, void(boost::system::error_code, int)> init;
+    Handler handler;
 
 #if defined(BOOST_POSIX_API)
     bool errored = false;
@@ -52,9 +51,8 @@ struct async_system_handler : ::boost::process::detail::api::async_handler
     template<typename ExitHandler_>
     async_system_handler(
             boost::asio::io_context & ios,
-            ExitHandler_ && exit_handler) : ios(ios), init(exit_handler)
+            ExitHandler_ && exit_handler) : ios(ios), handler(std::forward<ExitHandler_>(exit_handler))
     {
-
     }
 
 
@@ -64,21 +62,15 @@ struct async_system_handler : ::boost::process::detail::api::async_handler
 #if defined(BOOST_POSIX_API)
         errored = true;
 #endif
-        auto & h = init.completion_handler;
+        auto h = std::make_shared<Handler>(std::move(handler));
         boost::asio::post(
             ios.get_executor(),
             [h, ec]() mutable
             {
-                h(boost::system::error_code(ec.value(), boost::system::system_category()), -1);
+                (*h)(boost::system::error_code(ec.value(), boost::system::system_category()), -1);
             });
     }
 
-    BOOST_ASIO_INITFN_RESULT_TYPE(ExitHandler, void (boost::system::error_code, int))
-        get_result()
-    {
-        return init.result.get();
-    }
-
     template<typename Executor>
     std::function<void(int, const std::error_code&)> on_exit_handler(Executor&)
     {
@@ -86,10 +78,10 @@ struct async_system_handler : ::boost::process::detail::api::async_handler
         if (errored)
             return [](int , const std::error_code &){};
 #endif
-        auto & h = init.completion_handler;
+        auto h = std::make_shared<Handler>(std::move(handler));
         return [h](int exit_code, const std::error_code & ec) mutable
                {
-                    h(boost::system::error_code(ec.value(), boost::system::system_category()), exit_code);
+                    (*h)(boost::system::error_code(ec.value(), boost::system::system_category()), exit_code);
                };
     }
 };
@@ -120,21 +112,36 @@ inline boost::process::detail::dummy
     async_system(boost::asio::io_context & ios, ExitHandler && exit_handler, Args && ...args);
 #endif
 
+namespace detail
+{
+struct async_system_init_op
+{
+
+    template<typename Handler, typename ... Args>
+    void operator()(Handler && handler, asio::io_context & ios, Args && ... args)
+    {
+        detail::async_system_handler<typename std::decay<Handler>::type> async_h{ios, std::forward<Handler>(handler)};
+        child(ios, std::forward<Args>(args)..., async_h ).detach();
+    }
+};
+
+
+}
+
+
 template<typename ExitHandler, typename ...Args>
 inline BOOST_ASIO_INITFN_RESULT_TYPE(ExitHandler, void (boost::system::error_code, int))
     async_system(boost::asio::io_context & ios, ExitHandler && exit_handler, Args && ...args)
 {
-    detail::async_system_handler<ExitHandler> async_h{ios, std::forward<ExitHandler>(exit_handler)};
-
+    
     typedef typename ::boost::process::detail::has_error_handler<boost::fusion::tuple<Args...>>::type
             has_err_handling;
 
     static_assert(!has_err_handling::value, "async_system cannot have custom error handling");
 
-
-    child(ios, std::forward<Args>(args)..., async_h ).detach();
-
-    return async_h.get_result();
+    return boost::asio::async_initiate<ExitHandler, void (boost::system::error_code, int)>(
+        detail::async_system_init_op{}, exit_handler, ios, std::forward<Args>(args)...
+    );
 }
 
 

include/boost/process/detail/child_decl.hpp

@@ -125,7 +125,10 @@ public:
         boost::process::detail::throw_error(ec, "wait error");
     }
 
+#if !defined(BOOST_PROCESS_NO_DEPRECATED)
+
     template< class Rep, class Period >
+    BOOST_DEPRECATED("wait_for is unreliable")
     bool wait_for (const std::chrono::duration<Rep, Period>& rel_time)
     {
         std::error_code ec;
@@ -135,6 +138,7 @@ public:
     }
 
     template< class Clock, class Duration >
+    BOOST_DEPRECATED("wait_until is unreliable")
     bool wait_until(const std::chrono::time_point<Clock, Duration>& timeout_time )
     {
         std::error_code ec;
@@ -142,6 +146,7 @@ public:
         boost::process::detail::throw_error(ec, "wait_until error");
         return b;
     }
+#endif
 
     bool running(std::error_code & ec) noexcept
     {
@@ -178,13 +183,16 @@ public:
         }
     }
 
+#if !defined(BOOST_PROCESS_NO_DEPRECATED)
     template< class Rep, class Period >
+    BOOST_DEPRECATED("wait_for is unreliable")
     bool wait_for (const std::chrono::duration<Rep, Period>& rel_time, std::error_code & ec) noexcept
     {
         return wait_until(std::chrono::steady_clock::now() + rel_time, ec);
     }
 
     template< class Clock, class Duration >
+    BOOST_DEPRECATED("wait_until is unreliable")
     bool wait_until(const std::chrono::time_point<Clock, Duration>& timeout_time, std::error_code & ec) noexcept
     {
         if (!_exited())
@@ -197,7 +205,7 @@ public:
         }
         return true;
     }
-
+#endif
 
     bool valid() const
     {

include/boost/process/detail/config.hpp

@@ -114,6 +114,8 @@ template<typename Char> constexpr Char space_sign();
 template<> constexpr char     space_sign<char>    () {return  ' '; }
 template<> constexpr wchar_t  space_sign<wchar_t> () {return L' '; }
 
+}
+}
+}
 
-}}}
 #endif

include/boost/process/detail/posix/basic_cmd.hpp

@@ -139,7 +139,7 @@ struct exe_cmd_init<char> : boost::process::detail::api::handler_base_ext
     }
     static exe_cmd_init cmd_shell(std::string&& cmd)
     {
-        std::vector<std::string> args = {"-c", "\"" + cmd + "\""};
+        std::vector<std::string> args = {"-c", cmd};
         std::string sh = shell().string();
 
         return exe_cmd_init(
@@ -155,13 +155,15 @@ private:
 
 std::vector<char*> exe_cmd_init<char>::make_cmd()
 {
+    // any string must be writable.
+    static char empty_string[1] = "";
     std::vector<char*> vec;
     if (!exe.empty())
-        vec.push_back(&exe.front());
+        vec.push_back(exe.empty() ? empty_string : &exe.front());
 
     if (!args.empty()) {
         for (auto & v : args)
-            vec.push_back(&v.front());
+            vec.push_back(v.empty() ? empty_string : &v.front());
     }
 
     vec.push_back(nullptr);

include/boost/process/detail/posix/executor.hpp

@@ -155,8 +155,8 @@ class executor
     void write_error(const std::error_code & ec, const char * msg)
     {
         //I am the child
-        const auto len = std::strlen(msg);
-        int data[2] = {ec.value(), static_cast<int>(len + 1)};
+        const auto len = static_cast<int>(std::strlen(msg));
+        int data[2] = {ec.value(), len + 1};
 
         boost::ignore_unused(::write(_pipe_sink, &data[0], sizeof(int) * 2));
         boost::ignore_unused(::write(_pipe_sink, msg, len));
@@ -444,6 +444,8 @@ child executor<Sequence>::invoke(boost::mpl::false_, boost::mpl::false_)
     }
     if (_ec)
     {
+        //if an error occured we need to reap the child process
+        ::waitpid(this->pid, nullptr, WNOHANG);
         boost::fusion::for_each(seq, call_on_error(*this, _ec));
         return child();
     }
@@ -537,6 +539,7 @@ child executor<Sequence>::invoke(boost::mpl::false_, boost::mpl::true_)
 
     if (_ec)
     {
+        ::waitpid(this->pid, nullptr, WNOHANG);
         boost::fusion::for_each(seq, call_on_error(*this, _ec));
         return child();
     }

include/boost/process/detail/posix/search_path.hpp

@@ -27,7 +27,11 @@ inline boost::process::filesystem::path search_path(
     for (const boost::process::filesystem::path & pp : path)
     {
         auto p = pp / filename;
+#if defined(BOOST_PROCESS_USE_STD_FS)
+        std::error_code ec;
+#else
         boost::system::error_code ec;
+#endif
         bool file = boost::process::filesystem::is_regular_file(p, ec);
         if (!ec && file && ::access(p.c_str(), X_OK) == 0)
             return p;

include/boost/process/detail/posix/sigchld_service.hpp

@@ -15,6 +15,7 @@
 #include <signal.h>
 #include <functional>
 #include <sys/wait.h>
+#include <list>
 
 namespace boost { namespace process { namespace detail { namespace posix {
 
@@ -23,7 +24,7 @@ class sigchld_service : public boost::asio::detail::service_base<sigchld_service
     boost::asio::strand<boost::asio::io_context::executor_type> _strand{get_io_context().get_executor()};
     boost::asio::signal_set _signal_set{get_io_context(), SIGCHLD};
 
-    std::vector<std::pair<::pid_t, std::function<void(int, std::error_code)>>> _receivers;
+    std::list<std::pair<::pid_t, std::function<void(int, std::error_code)>>> _receivers;
     inline void _handle_signal(const boost::system::error_code & ec);
 public:
     sigchld_service(boost::asio::io_context & io_context)

include/boost/process/detail/windows/basic_cmd.hpp

@@ -159,8 +159,13 @@ struct exe_cmd_init : handler_base_ext
         return exe_cmd_init<Char>(std::move(sh), std::move(args_));
     }
 
+#ifdef BOOST_PROCESS_USE_STD_FS
+    static std:: string get_shell(char)    {return shell(). string(); }
+    static std::wstring get_shell(wchar_t) {return shell().wstring(); }
+#else
     static std:: string get_shell(char)    {return shell(). string(codecvt()); }
     static std::wstring get_shell(wchar_t) {return shell().wstring(codecvt());}
+#endif
 
     static exe_cmd_init<Char> cmd_shell(string_type&& cmd)
     {

include/boost/process/detail/windows/environment.hpp

@@ -90,12 +90,12 @@ inline auto native_environment_impl<Char>::get(const pointer_type id) -> string_
                 ::boost::process::detail::throw_last_error("GetEnvironmentVariable() failed");
             else
                 return std::basic_string<Char>(
-                        buf.data(), buf.data()+ size + 1);
+                        buf.data(), buf.data()+ size);
 
         }
 
     }
-    return std::basic_string<Char>(buf, buf+size+1);
+    return std::basic_string<Char>(buf, buf+size);
 }
 
 template<typename Char>

include/boost/process/detail/windows/search_path.hpp

@@ -35,7 +35,9 @@ inline boost::process::filesystem::path search_path(
             [&](const value_type & e)
              {return id == ::boost::to_upper_copy(e.get_name(), ::boost::process::detail::process_locale());});
 
-    auto extensions_in = itr->to_vector();
+    std::vector<std::wstring> extensions_in;
+    if (itr != ne.cend())
+        extensions_in = itr->to_vector();
 
     std::vector<std::wstring> extensions((extensions_in.size() * 2) + 1);
 
@@ -61,7 +63,11 @@ inline boost::process::filesystem::path search_path(
         {
             boost::process::filesystem::path pp_ext = p;
             pp_ext += ext;
+#if defined(BOOST_PROCESS_USE_STD_FS)
+            std::error_code ec;
+#else
             boost::system::error_code ec;
+#endif
             bool file = boost::process::filesystem::is_regular_file(pp_ext, ec);
             if (!ec && file &&
                 ::boost::winapi::sh_get_file_info(pp_ext.native().c_str(), 0, 0, 0, ::boost::winapi::SHGFI_EXETYPE_))

include/boost/process/group.hpp

@@ -122,9 +122,11 @@ public:
     {
         boost::process::detail::api::wait(_group_handle, ec);
     }
+#if !defined(BOOST_PROCESS_NO_DEPRECATED)
     /** Wait for the process group to exit for period of time.
       *  \return True if all child processes exited while waiting.*/
     template< class Rep, class Period >
+    BOOST_DEPRECATED("wait_for is unreliable")
     bool wait_for  (const std::chrono::duration<Rep, Period>& rel_time)
     {
         return boost::process::detail::api::wait_for(_group_handle, rel_time);
@@ -132,6 +134,7 @@ public:
 
     /** \overload bool wait_for(const std::chrono::duration<Rep, Period>& timeout_time ) */
     template< class Rep, class Period >
+    BOOST_DEPRECATED("wait_for is unreliable")
     bool wait_for  (const std::chrono::duration<Rep, Period>& rel_time, std::error_code & ec) noexcept
     {
         return boost::process::detail::api::wait_for(_group_handle, rel_time, ec);
@@ -140,17 +143,19 @@ public:
     /** Wait for the process group to exit until a point in time.
       *  \return True if all child processes exited while waiting.*/
     template< class Clock, class Duration >
+    BOOST_DEPRECATED("wait_until is unreliable")
     bool wait_until(const std::chrono::time_point<Clock, Duration>& timeout_time )
     {
         return boost::process::detail::api::wait_until(_group_handle, timeout_time);
     }
     /** \overload bool wait_until(const std::chrono::time_point<Clock, Duration>& timeout_time ) */
     template< class Clock, class Duration >
+    BOOST_DEPRECATED("wait_until is unreliable")
     bool wait_until(const std::chrono::time_point<Clock, Duration>& timeout_time, std::error_code & ec) noexcept
     {
         return boost::process::detail::api::wait_until(_group_handle, timeout_time, ec);
     }
-
+#endif
     ///Check if the group has a valid handle.
     bool valid() const
     {

include/boost/process/v2/bind_launcher.hpp

@@ -0,0 +1,240 @@
+//
+// boost/process/v2/bind_launcher.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2022 Klemens D. Morgenstern (klemens dot morgenstern at gmx dot net)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_PROCESS_V2_BIND_LAUNCHER_HPP
+#define BOOST_PROCESS_V2_BIND_LAUNCHER_HPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/default_launcher.hpp>
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace detail
+{
+
+template<std::size_t ... Idx>
+struct index_sequence { };
+
+template<std::size_t Size, typename T> 
+struct make_index_sequence_impl;
+
+template<std::size_t Size, std::size_t ... Idx> 
+struct make_index_sequence_impl<Size, index_sequence<Idx...>>
+{
+    constexpr make_index_sequence_impl() {}
+    using type = typename make_index_sequence_impl<Size - 1u, index_sequence<Size - 1u, Idx...>>::type;
+};
+
+template<std::size_t ... Idx> 
+struct make_index_sequence_impl<0u, index_sequence<Idx...>>
+{
+    constexpr make_index_sequence_impl() {}
+    using type = index_sequence<Idx...>;
+};
+
+
+template<std::size_t Cnt>
+struct make_index_sequence
+{
+    using type = typename make_index_sequence_impl<Cnt, index_sequence<>>::type;
+};
+
+template<std::size_t Cnt>
+using make_index_sequence_t = typename make_index_sequence<Cnt>::type;
+
+}
+
+/** @brief  Utility class to bind initializers to a launcher
+ * @tparam Launcher The inner launcher to be used
+ * @tparam ...Init The initializers to be prepended.
+ * 
+ * This can be used when multiple processes shared some settings, 
+ * e.g. 
+ * 
+ */
+template<typename Launcher, typename ... Init>
+struct bound_launcher
+{
+    template<typename Launcher_, typename ... Init_>
+    bound_launcher(Launcher_ && l, Init_ && ... init) : 
+        launcher_(std::forward<Launcher_>(l)), init_(std::forward<Init_>(init)...) 
+    {
+    }
+
+    template<typename ExecutionContext, typename Args, typename ... Inits>
+    auto operator()(ExecutionContext & context,
+                    const typename std::enable_if<std::is_convertible<
+                            ExecutionContext&, BOOST_PROCESS_V2_ASIO_NAMESPACE::execution_context&>::value,
+                            filesystem::path >::type & executable,
+                    Args && args,
+                    Inits && ... inits) -> basic_process<typename ExecutionContext::executor_type>
+    {
+        return invoke(detail::make_index_sequence_t<sizeof...(Init)>{},
+                      context, 
+                      executable,  
+                      std::forward<Args>(args), 
+                      std::forward<Inits>(inits)...);
+    }
+
+
+    template<typename ExecutionContext, typename Args, typename ... Inits>
+    auto operator()(ExecutionContext & context,
+                    error_code & ec,
+                    const typename std::enable_if<std::is_convertible<
+                            ExecutionContext&, BOOST_PROCESS_V2_ASIO_NAMESPACE::execution_context&>::value,
+                            filesystem::path >::type & executable,
+                    Args && args,
+                    Inits && ... inits ) -> basic_process<typename ExecutionContext::executor_type>
+    {
+        return invoke(detail::make_index_sequence_t<sizeof...(Init)>{},
+                      context, ec,
+                      executable,  
+                      std::forward<Args>(args), 
+                      std::forward<Inits>(inits)...);
+    }
+
+    template<typename Executor, typename Args, typename ... Inits>
+    auto operator()(Executor exec,
+                    const typename std::enable_if<
+                            BOOST_PROCESS_V2_ASIO_NAMESPACE::execution::is_executor<Executor>::value ||
+                            BOOST_PROCESS_V2_ASIO_NAMESPACE::is_executor<Executor>::value,
+                            filesystem::path >::type & executable,
+                    Args && args,
+                    Inits && ... inits ) -> basic_process<Executor>
+    {
+        return invoke(detail::make_index_sequence_t<sizeof...(Init)>{},
+                      std::move(exec), 
+                      executable,  
+                      std::forward<Args>(args), 
+                      std::forward<Inits>(inits)...);
+    }
+
+    template<typename Executor, typename Args, typename ... Inits>
+    auto operator()(Executor exec,
+                    error_code & ec,
+                    const typename std::enable_if<
+                            BOOST_PROCESS_V2_ASIO_NAMESPACE::execution::is_executor<Executor>::value ||
+                            BOOST_PROCESS_V2_ASIO_NAMESPACE::is_executor<Executor>::value,
+                            filesystem::path >::type & executable,
+                    Args && args,
+                    Inits && ... inits ) -> basic_process<Executor>
+    {
+        return invoke(detail::make_index_sequence_t<sizeof...(Init)>{},
+                      std::move(exec), ec,
+                      executable,  
+                      std::forward<Args>(args), 
+                      std::forward<Inits>(inits)...);
+    }
+
+  private:
+    template<std::size_t ... Idx, typename ExecutionContext, typename Args, typename ... Inits>
+    auto invoke(detail::index_sequence<Idx...>, 
+                ExecutionContext & context,
+                const typename std::enable_if<std::is_convertible<
+                        ExecutionContext&, BOOST_PROCESS_V2_ASIO_NAMESPACE::execution_context&>::value,
+                        filesystem::path >::type & executable,
+                Args && args,
+                Inits && ... inits) -> basic_process<typename ExecutionContext::executor_type>
+    {
+        return launcher_(context, 
+                         executable,  
+                         std::forward<Args>(args), 
+                         std::get<Idx>(init_)...,
+                         std::forward<Inits>(inits)...);
+    }
+
+
+    template<std::size_t ... Idx, typename ExecutionContext, typename Args, typename ... Inits>
+    auto invoke(detail::index_sequence<Idx...>,
+                ExecutionContext & context,
+                error_code & ec,
+                const typename std::enable_if<std::is_convertible<
+                        ExecutionContext&, BOOST_PROCESS_V2_ASIO_NAMESPACE::execution_context&>::value,
+                        filesystem::path >::type & executable,
+                Args && args,
+                Inits && ... inits ) -> basic_process<typename ExecutionContext::executor_type>
+    {
+        return launcher_(context, ec,
+                         executable,  
+                         std::forward<Args>(args), 
+                         std::get<Idx>(init_)...,
+                         std::forward<Inits>(inits)...);
+    }
+
+    template<std::size_t ... Idx, typename Executor, typename Args, typename ... Inits>
+    auto invoke(detail::index_sequence<Idx...>,
+                Executor exec,
+                const typename std::enable_if<
+                        BOOST_PROCESS_V2_ASIO_NAMESPACE::execution::is_executor<Executor>::value ||
+                        BOOST_PROCESS_V2_ASIO_NAMESPACE::is_executor<Executor>::value,
+                        filesystem::path >::type & executable,
+                Args && args,
+                Inits && ... inits ) -> basic_process<Executor>
+    {
+        return launcher_(std::move(exec), 
+                         executable,  
+                         std::forward<Args>(args), 
+                         std::get<Idx>(init_)...,
+                         std::forward<Inits>(inits)...);
+    }
+
+    template<std::size_t ... Idx, typename Executor, typename Args, typename ... Inits>
+    auto invoke(detail::index_sequence<Idx...>,
+                Executor exec,
+                error_code & ec,
+                const typename std::enable_if<
+                        BOOST_PROCESS_V2_ASIO_NAMESPACE::execution::is_executor<Executor>::value ||
+                        BOOST_PROCESS_V2_ASIO_NAMESPACE::is_executor<Executor>::value,
+                        filesystem::path >::type & executable,
+                Args && args,
+                Inits && ... inits ) -> basic_process<Executor>
+    {
+        return launcher_(std::move(exec), ec,
+                         executable,  
+                         std::forward<Args>(args), 
+                         std::get<Idx>(init_)...,
+                         std::forward<Inits>(inits)...);
+    }
+
+    Launcher launcher_;
+    std::tuple<Init...> init_;
+};
+
+
+template<typename Launcher, typename ... Init>
+auto bind_launcher(Launcher && launcher, Init && ... init)
+    -> bound_launcher<typename std::decay<Launcher>::type,
+                      typename std::decay<Init>::type...>
+{
+    return bound_launcher<typename std::decay<Launcher>::type,
+                          typename std::decay<Init>::type...>(
+                            std::forward<Launcher>(launcher), 
+                            std::forward<Init>(init)...);
+}
+
+/// @brief  @overload bind_launcher(Launcher && launcher, Init && init)
+/// @tparam ...Init The initializer types to bind to the default_launcher.
+/// @param ...init The initializers types to bind to the default_launcher.
+/// @return The new default_launcher.
+template<typename ... Init>
+auto bind_default_launcher(Init && ... init)
+    -> bound_launcher<default_process_launcher,
+                      typename std::decay<Init>::type...>
+{
+    return bound_launcher<default_process_launcher,
+                          typename std::decay<Init>::type...>(
+                            default_process_launcher(), 
+                            std::forward<Init>(init)...);
+}
+
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#endif // BOOST_PROCESS_V2_BIND_LAUNCHER_HPP

include/boost/process/v2/cstring_ref.hpp

@@ -106,7 +106,7 @@ struct basic_cstring_ref
     BOOST_CXX14_CONSTEXPR const_reference at(size_type pos) const
     {
         if (pos >= size())
-            throw std::out_of_range("cstring-view out of range");
+            throw_exception(std::out_of_range("cstring-view out of range"));
         return view_[pos];
     }
     BOOST_CONSTEXPR const_reference front() const  {return *view_;}

include/boost/process/v2/detail/config.hpp

@@ -7,18 +7,19 @@
 
 #if defined(BOOST_PROCESS_V2_STANDALONE)
 
-#define BOOST_PROCESS_V2_ASIO_NAMESPACE ::asio
+#define BOOST_PROCESS_V2_ASIO_NAMESPACE asio
 #define BOOST_PROCESS_V2_COMPLETION_TOKEN_FOR(Sig) ASIO_COMPLETION_TOKEN_FOR(Sig)
 #define BOOST_PROCESS_V2_DEFAULT_COMPLETION_TOKEN_TYPE(Executor) ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(Executor)
 #define BOOST_PROCESS_V2_INITFN_AUTO_RESULT_TYPE(Token, Signature) ASIO_INITFN_AUTO_RESULT_TYPE(Token, Signature)
 #define BOOST_PROCESS_V2_DEFAULT_COMPLETION_TOKEN(Executor) ASIO_DEFAULT_COMPLETION_TOKEN(Executor)
-
+#define BOOST_PROCESS_V2_INITFN_DEDUCED_RESULT_TYPE(x,y,z) ASIO_INITFN_DEDUCED_RESULT_TYPE(x,y,z)
 
 #include <asio/detail/config.hpp>
 #include <system_error>
 #include <filesystem>
 #include <string_view>
 #include <iomanip>
+#include <optional>
 
 #if defined(ASIO_WINDOWS)
 #define BOOST_PROCESS_V2_WINDOWS 1
@@ -39,18 +40,19 @@
 
 #else
 
-#define BOOST_PROCESS_V2_ASIO_NAMESPACE ::boost::asio
+#define BOOST_PROCESS_V2_ASIO_NAMESPACE boost::asio
 #define BOOST_PROCESS_V2_COMPLETION_TOKEN_FOR(Sig) BOOST_ASIO_COMPLETION_TOKEN_FOR(Sig)
 #define BOOST_PROCESS_V2_DEFAULT_COMPLETION_TOKEN_TYPE(Executor) BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(Executor)
 #define BOOST_PROCESS_V2_INITFN_AUTO_RESULT_TYPE(Token, Signature) BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(Token, Signature)
 #define BOOST_PROCESS_V2_DEFAULT_COMPLETION_TOKEN(Executor) BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(Executor)
-
+#define BOOST_PROCESS_V2_INITFN_DEDUCED_RESULT_TYPE(x,y,z) BOOST_ASIO_INITFN_DEDUCED_RESULT_TYPE(x,y,z)
 
 #include <boost/config.hpp>
 #include <boost/io/quoted.hpp>
 #include <boost/system/error_code.hpp>
 #include <boost/system/system_category.hpp>
 #include <boost/system/system_error.hpp>
+#include <boost/optional.hpp>
 
 #if defined(BOOST_WINDOWS_API)
 #define BOOST_PROCESS_V2_WINDOWS 1
@@ -72,11 +74,9 @@
 
 #if defined(BOOST_PROCESS_USE_STD_FS)
 #include <filesystem>
-#include <optional>
 #else
 #include <boost/filesystem/path.hpp>
 #include <boost/filesystem/operations.hpp>
-#include <boost/optional.hpp>
 #endif
 
 #define BOOST_PROCESS_V2_BEGIN_NAMESPACE namespace boost { namespace process { namespace v2 {
@@ -97,6 +97,14 @@ namespace filesystem = std::filesystem;
 using std::quoted;
 using std::optional;
 
+#define BOOST_PROCESS_V2_RETURN_EC(ev)                                                                  \
+  return ::BOOST_PROCESS_V2_NAMESPACE::error_code(ev, ::BOOST_PROCESS_V2_NAMESPACE::system_category()); \
+
+#define BOOST_PROCESS_V2_ASSIGN_EC(ec, ...) ec.assign(__VA_ARGS__);
+#define BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)                         \
+  ec.assign(::BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error());   \
+
+
 #else
 
 using boost::system::error_code ;
@@ -112,6 +120,25 @@ namespace filesystem = std::filesystem;
 namespace filesystem = boost::filesystem;
 #endif
 
+#define BOOST_PROCESS_V2_RETURN_EC(ev)                                                                     \
+{                                                                                                          \
+  static constexpr auto loc##__LINE__((BOOST_CURRENT_LOCATION));                                           \
+  return ::BOOST_PROCESS_V2_NAMESPACE::error_code(ev, ::BOOST_PROCESS_V2_NAMESPACE::system_category(), &loc##__LINE__);   \
+}
+
+#define BOOST_PROCESS_V2_ASSIGN_EC(ec, ...)                       \
+{                                                                 \
+  static constexpr auto loc##__LINE__((BOOST_CURRENT_LOCATION));  \
+  ec.assign(__VA_ARGS__,  &loc##__LINE__);                        \
+}
+
+#define BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)                                         \
+{                                                                                      \
+  static constexpr auto loc##__LINE__((BOOST_CURRENT_LOCATION));                       \
+  ec.assign(::BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error(), &loc##__LINE__);   \
+}
+
+
 #endif
 
 BOOST_PROCESS_V2_END_NAMESPACE
@@ -142,7 +169,7 @@ BOOST_PROCESS_V2_END_NAMESPACE
 #endif
 #endif
 
-#if defined(__FreeBSD__) && !defined(BOOST_PROCESS_V2_DISABLE_PDFORK)
+#if defined(__FreeBSD__) && defined(BOOST_PROCESS_V2_ENABLE_PDFORK)
 #define BOOST_PROCESS_V2_PDFORK 1
 #define BOOST_PROCESS_V2_HAS_PROCESS_HANDLE 1
 #endif
@@ -150,6 +177,4 @@ BOOST_PROCESS_V2_END_NAMESPACE
 #define BOOST_PROCESS_V2_HAS_PROCESS_HANDLE 1
 #endif
 
-
-
 #endif //BOOST_PROCESS_V2_DETAIL_CONFIG_HPP

include/boost/process/v2/detail/environment_posix.hpp

@@ -14,7 +14,7 @@
 #include <boost/process/v2/detail/config.hpp>
 #include <boost/process/v2/cstring_ref.hpp>
 
-#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__APPLE__) || defined(__MACH__)
+#if defined(__APPLE__) || defined(__MACH__) || defined(__FreeBSD__) || defined(__DragonFly__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__sun)
 extern "C" { extern char **environ; }
 #endif
 
@@ -77,4 +77,4 @@ BOOST_PROCESS_V2_DECL bool is_executable(const filesystem::path & pth, error_cod
 
 BOOST_PROCESS_V2_END_NAMESPACE
 
-#endif
+#endif

include/boost/process/v2/detail/impl/environment_posix.ipp

@@ -34,7 +34,7 @@ basic_cstring_ref<char_type, value_char_traits<char>> get(
     auto res = ::getenv(key.c_str());
     if (res == nullptr)
     {
-        ec.assign(ENOENT, system_category());
+        BOOST_PROCESS_V2_ASSIGN_EC(ec, ENOENT, system_category())
         return {};
     }
     return res;
@@ -45,13 +45,13 @@ void set(basic_cstring_ref<char_type,   key_char_traits<char_type>>   key,
                 error_code & ec)
 {
     if (::setenv(key.c_str(), value.c_str(), true))
-        ec = ::BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error();
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 }
 
 void unset(basic_cstring_ref<char_type, key_char_traits<char_type>> key, error_code & ec)
 {
     if (::unsetenv(key.c_str()))
-        ec = ::BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error();
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 }
 
 

include/boost/process/v2/detail/impl/environment_win.ipp

@@ -50,7 +50,7 @@ std::basic_string<char_type, value_char_traits<char_type>> get(
   buf.resize(size);
 
   if (buf.size() == 0)
-    ec = ::BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error();
+    BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 
   return buf;
 }
@@ -60,14 +60,14 @@ void set(basic_cstring_ref<char_type,   key_char_traits<char_type>>   key,
          error_code & ec)
 {
   if (!::SetEnvironmentVariableW(key.c_str(), value.c_str()))
-    ec = ::BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error();
+    BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 }
 
 void unset(basic_cstring_ref<char_type, key_char_traits<char_type>> key,
            error_code & ec)
 {
   if (!::SetEnvironmentVariableW(key.c_str(), nullptr))
-    ec = ::BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error();
+    BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 }
 
 
@@ -88,7 +88,7 @@ std::basic_string<char, value_char_traits<char>> get(
   buf.resize(size);
 
   if (buf.size() == 0)
-    ec = ::BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error();
+    BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 
   return buf;
 }
@@ -98,14 +98,14 @@ void set(basic_cstring_ref<char,   key_char_traits<char>>   key,
          error_code & ec)
 {
   if (!::SetEnvironmentVariableA(key.c_str(), value.c_str()))
-    ec = ::BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error();
+    BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 }
 
 void unset(basic_cstring_ref<char, key_char_traits<char>> key,
            error_code & ec)
 {
   if (!::SetEnvironmentVariableA(key.c_str(), nullptr))
-    ec = ::BOOST_PROCESS_V2_NAMESPACE::detail::get_last_error();
+    BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 }
 
 

include/boost/process/v2/detail/impl/last_error.ipp

@@ -28,20 +28,6 @@ error_code get_last_error()
 
 }
 
-void throw_last_error()
-{
-    throw system_error(get_last_error());
-}
-void throw_last_error(const char * msg)
-{
-    throw system_error(get_last_error(), msg);
-}
-void throw_last_error(const std::string & msg)
-{
-    throw system_error(get_last_error(), msg);
-}
-
-
 }
 BOOST_PROCESS_V2_END_NAMESPACE
 

include/boost/process/v2/detail/impl/process_handle_windows.ipp

@@ -9,9 +9,20 @@
 #include <boost/process/v2/detail/last_error.hpp>
 #include <boost/process/v2/detail/throw_error.hpp>
 #include <boost/process/v2/detail/process_handle_windows.hpp>
+#include <boost/process/v2/ext/detail/proc_info.hpp>
 
 #include <windows.h>
 
+#if !defined(BOOST_PROCESS_V2_DISABLE_UNDOCUMENTED_API)
+extern "C" 
+{
+
+LONG WINAPI NtResumeProcess(HANDLE ProcessHandle);
+LONG WINAPI NtSuspendProcess(HANDLE ProcessHandle);
+
+}
+#endif
+
 BOOST_PROCESS_V2_BEGIN_NAMESPACE
 
 namespace detail
@@ -23,7 +34,7 @@ void get_exit_code_(
     error_code & ec)
 {
     if (!::GetExitCodeProcess(handle, &exit_code))
-        ec = detail::get_last_error();
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 }
 
 
@@ -31,7 +42,12 @@ HANDLE open_process_(DWORD pid)
 {
     auto proc = OpenProcess(PROCESS_TERMINATE | SYNCHRONIZE, FALSE, pid);
     if (proc == nullptr)
-        detail::throw_last_error("open_process()");
+    {
+        error_code ec;
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        throw system_error(ec, "open_process()");
+    }
+
     return proc;
 }
 
@@ -40,17 +56,17 @@ void terminate_if_running_(HANDLE handle)
 {
     DWORD exit_code = 0u;
     if (handle == INVALID_HANDLE_VALUE)
-      return ;
+        return ;
     if (::GetExitCodeProcess(handle, &exit_code))
-      if (exit_code == STILL_ACTIVE)
-        ::TerminateProcess(handle, 260);
+        if (exit_code == STILL_ACTIVE)
+            ::TerminateProcess(handle, 260);
 }
 
 bool check_handle_(HANDLE handle, error_code & ec)
 {
     if (handle == INVALID_HANDLE_VALUE)
     {
-        ec.assign(ERROR_INVALID_HANDLE_STATE, system_category());
+        BOOST_PROCESS_V2_ASSIGN_EC(ec, ERROR_INVALID_HANDLE_STATE, system_category())
         return false;
     }
     return true;
@@ -60,8 +76,8 @@ bool check_pid_(pid_type pid_, error_code & ec)
 {
     if (pid_ == 0)
     {
-      ec.assign(ERROR_INVALID_HANDLE_STATE, system_category());
-      return false;
+        BOOST_PROCESS_V2_ASSIGN_EC(ec, ERROR_INVALID_HANDLE_STATE, system_category())
+        return false;
     }
     return true;
 }
@@ -73,46 +89,73 @@ struct enum_windows_data_t
 };
 
 static BOOL CALLBACK enum_window(HWND hwnd, LPARAM param)
-  {
+{
     auto data = reinterpret_cast<enum_windows_data_t*>(param);
     DWORD pid{0u};
     GetWindowThreadProcessId(hwnd, &pid);
-
     if (pid != data->pid)
-      return TRUE;
-
+        return TRUE;
+    
     LRESULT res = ::SendMessageW(hwnd, WM_CLOSE, 0, 0);
-    if (!res)
-      data->ec = detail::get_last_error();
-    return res != 0;
-  }
+
+    if (res)
+      BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(data->ec)
+    return res == 0;
+}
 
 void request_exit_(pid_type pid_, error_code & ec)
 {
     enum_windows_data_t data{ec, pid_};
 
     if (!::EnumWindows(enum_window, reinterpret_cast<LONG_PTR>(&data)))
-        ec = detail::get_last_error();
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 }
 
 void interrupt_(pid_type pid_, error_code & ec)
 {
     if (!::GenerateConsoleCtrlEvent(CTRL_C_EVENT, pid_))
-        ec = detail::get_last_error();
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 }
 
 void terminate_(HANDLE handle, error_code & ec, DWORD & exit_status)
 {
     if (!::TerminateProcess(handle, 260))
-        ec = detail::get_last_error();
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 }
 
 void check_running_(HANDLE handle, error_code & ec, DWORD & exit_status)
 {
     if (!::GetExitCodeProcess(handle, &exit_status))
-        ec = detail::get_last_error();
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
 }
 
+#if !defined(BOOST_PROCESS_V2_DISABLE_UNDOCUMENTED_API)
+void suspend_(HANDLE handle, error_code & ec)
+{
+    auto nt_err = NtSuspendProcess(handle);
+    ULONG dos_err = RtlNtStatusToDosError(nt_err);
+    if (dos_err)
+       BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+}
+
+void resume_(HANDLE handle, error_code & ec)
+{
+    auto nt_err = NtResumeProcess(handle);
+    ULONG dos_err = RtlNtStatusToDosError(nt_err);
+    if (dos_err)
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+}
+#else
+void suspend_(HANDLE, error_code & ec)
+{
+    BOOST_PROCESS_V2_ASSIGN_EC(ec, ERROR_CALL_NOT_IMPLEMENTED, system_category())
+}
+
+void resume_(HANDLE handle, error_code & ec)
+{
+    BOOST_PROCESS_V2_ASSIGN_EC(ec, ERROR_CALL_NOT_IMPLEMENTED, system_category())
+}
+#endif
 
 #if !defined(BOOST_PROCESS_V2_HEADER_ONLY)
 template struct basic_process_handle_win<>;

include/boost/process/v2/detail/impl/utf8.ipp

@@ -27,13 +27,13 @@ inline void handle_error(error_code & ec)
     switch (err)
     {
     case ERROR_INSUFFICIENT_BUFFER:
-        ec.assign(error::insufficient_buffer, error::utf8_category);
+        BOOST_PROCESS_V2_ASSIGN_EC(ec, error::insufficient_buffer, error::utf8_category)
         break;
     case ERROR_NO_UNICODE_TRANSLATION:
-        ec.assign(error::invalid_character, error::utf8_category);
+        BOOST_PROCESS_V2_ASSIGN_EC(ec, error::invalid_character, error::utf8_category)
         break;
     default:
-        ec.assign(err, system_category());
+        BOOST_PROCESS_V2_ASSIGN_EC(ec, err, system_category())
     }
 }
 
@@ -242,7 +242,7 @@ std::size_t convert_to_utf8(const wchar_t * in, std::size_t size,
         if (*from  > max_wchar) {
             from_next = from;
             to_next = to;
-            ec.assign(error::invalid_character, error::get_utf8_category());
+            BOOST_PROCESS_V2_ASSIGN_EC(ec, error::invalid_character, error::get_utf8_category())
             return 0u;
         }
 
@@ -270,7 +270,7 @@ std::size_t convert_to_utf8(const wchar_t * in, std::size_t size,
         if (to == to_end && i != cont_octet_count) {
             from_next = from;
             to_next = to - (i + 1);
-            ec.assign(error::insufficient_buffer, error::get_utf8_category());
+            BOOST_PROCESS_V2_ASSIGN_EC(ec, error::insufficient_buffer, error::get_utf8_category())
             return 0u;
         }
         ++from;
@@ -280,7 +280,7 @@ std::size_t convert_to_utf8(const wchar_t * in, std::size_t size,
 
     // Were we done or did we run out of destination space
     if (from != from_end)
-        ec.assign(error::insufficient_buffer, error::get_utf8_category());
+        BOOST_PROCESS_V2_ASSIGN_EC(ec, error::insufficient_buffer, error::get_utf8_category())
 
     return to_next - out;
 }
@@ -315,7 +315,7 @@ std::size_t convert_to_wide(const  char   * in, std::size_t size,
         if (invalid_leading_octet(*from)) {
             from_next = from;
             to_next = to;
-            ec.assign(error::invalid_character, error::get_utf8_category());
+            BOOST_PROCESS_V2_ASSIGN_EC(ec, error::invalid_character, error::get_utf8_category())
             return 0u;
         }
 
@@ -339,7 +339,7 @@ std::size_t convert_to_wide(const  char   * in, std::size_t size,
             if (invalid_continuing_octet(*from)) {
                 from_next = from;
                 to_next = to;
-                ec.assign(error::invalid_character, error::get_utf8_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, error::invalid_character, error::get_utf8_category())
                 return 0u;
             }
 
@@ -356,7 +356,7 @@ std::size_t convert_to_wide(const  char   * in, std::size_t size,
             // rewind "from" to before the current character translation
             from_next = from - (i + 1);
             to_next = to;
-            ec.assign(error::insufficient_buffer, error::get_utf8_category());
+            BOOST_PROCESS_V2_ASSIGN_EC(ec, error::insufficient_buffer, error::get_utf8_category())
             return 0u;
         }
         *to++ = ucs_result;
@@ -365,7 +365,7 @@ std::size_t convert_to_wide(const  char   * in, std::size_t size,
     to_next = to;
 
     if (from != from_end)
-        ec.assign(error::insufficient_buffer, error::get_utf8_category());
+        BOOST_PROCESS_V2_ASSIGN_EC(ec, error::insufficient_buffer, error::get_utf8_category())
 
     return to_next - out;
 }

include/boost/process/v2/detail/last_error.hpp

@@ -9,14 +9,13 @@
 
 BOOST_PROCESS_V2_BEGIN_NAMESPACE
 
-namespace detail {
+namespace detail
+{
 
 BOOST_PROCESS_V2_DECL error_code get_last_error();
-BOOST_PROCESS_V2_DECL void throw_last_error();
-BOOST_PROCESS_V2_DECL void throw_last_error(const char * msg);
-BOOST_PROCESS_V2_DECL void throw_last_error(const std::string & msg);
 
 }
+
 BOOST_PROCESS_V2_END_NAMESPACE
 
 #if defined(BOOST_PROCESS_V2_HEADER_ONLY)

include/boost/process/v2/detail/process_handle_fd.hpp

@@ -101,6 +101,8 @@ struct basic_process_handle_fd
     pid_type id() const
     { return pid_; }
 
+    native_handle_type native_handle() {return pid_;}
+
     void terminate_if_running(error_code &)
     {
         if (pid_ <= 0)
@@ -182,7 +184,42 @@ struct basic_process_handle_fd
         if (ec)
             detail::throw_error(ec, "request_exit");
     }
+    
+    void suspend()
+    {
+        if (pid_ <= 0)
+            return ;
+        error_code ec;
+        suspend(ec);
+        if (ec)
+            detail::throw_error(ec, "suspend");
+    }
 
+    void suspend(error_code &ec)
+    {
+        if (pid_ <= 0)
+            return ;
+        if (::kill(pid_, SIGSTOP) == -1)
+            ec = get_last_error();
+    }
+
+    void resume()
+    {
+        if (pid_ <= 0)
+            return ;
+        error_code ec;
+        resume(ec);
+        if (ec)
+            detail::throw_error(ec, "resume");
+    }
+
+    void resume(error_code &ec)
+    {
+        if (pid_ <= 0)
+            return ;
+        if (::kill(pid_, SIGCONT) == -1)
+            ec = get_last_error();
+    }
     void terminate(native_exit_code_type &exit_status, error_code &ec)
     {
         if (pid_ <= 0)

include/boost/process/v2/detail/process_handle_fd_or_signal.hpp

@@ -128,6 +128,7 @@ struct basic_process_handle_fd_or_signal
 
     pid_type id() const
     { return pid_; }
+    native_handle_type native_handle() {return pid_;}
 
     void terminate_if_running(error_code &)
     {
@@ -211,6 +212,42 @@ struct basic_process_handle_fd_or_signal
         if (ec)
             detail::throw_error(ec, "request_exit");
     }
+    
+    void suspend()
+    {
+        if (pid_ <= 0)
+            return ;
+        error_code ec;
+        suspend(ec);
+        if (ec)
+            detail::throw_error(ec, "suspend");
+    }
+
+    void suspend(error_code &ec)
+    {
+        if (pid_ <= 0)
+            return ;
+        if (::kill(pid_, SIGSTOP) == -1)
+            ec = get_last_error();
+    }
+
+    void resume()
+    {
+        if (pid_ <= 0)
+            return ;
+        error_code ec;
+        resume(ec);
+        if (ec)
+            detail::throw_error(ec, "resume");
+    }
+
+    void resume(error_code &ec)
+    {
+        if (pid_ <= 0)
+            return ;
+        if (::kill(pid_, SIGCONT) == -1)
+            ec = get_last_error();
+    }
 
     void terminate(native_exit_code_type &exit_status, error_code &ec)
     {

include/boost/process/v2/detail/process_handle_signal.hpp

@@ -41,7 +41,7 @@ struct basic_process_handle_signal
     {
          native_handle_type() = delete;
          native_handle_type(const native_handle_type & ) = delete;
-        ~native_handle_type() = delete;
+        ~native_handle_type() = default;
     };
 
     typedef Executor executor_type;
@@ -101,8 +101,8 @@ struct basic_process_handle_signal
         handle.pid_ = -1;
     }
 
-    pid_type id() const
-    { return pid_; }
+    pid_type id() const { return pid_; }
+    native_handle_type native_handle() {return {};}
 
     void terminate_if_running(error_code &)
     {
@@ -112,7 +112,7 @@ struct basic_process_handle_signal
     void terminate_if_running()
     {
         if (pid_ <= 0)
-            return ;
+            return;
         if (::waitpid(pid_, nullptr, WNOHANG) == 0)
         {
             ::kill(pid_, SIGKILL);
@@ -123,7 +123,7 @@ struct basic_process_handle_signal
     void wait(native_exit_code_type &exit_status, error_code &ec)
     {
         if (pid_ <= 0)
-            return ;
+            return;
         while (::waitpid(pid_, &exit_status, 0) < 0)
         {
             if (errno != EINTR)
@@ -137,7 +137,7 @@ struct basic_process_handle_signal
     void wait(native_exit_code_type &exit_status)
     {
         if (pid_ <= 0)
-            return ;
+            return;
         error_code ec;
         wait(exit_status, ec);
         if (ec)
@@ -147,7 +147,7 @@ struct basic_process_handle_signal
     void interrupt(error_code &ec)
     {
         if (pid_ <= 0)
-            return ;
+            return;
         if (::kill(pid_, SIGTERM) == -1)
             ec = get_last_error();
     }
@@ -155,7 +155,7 @@ struct basic_process_handle_signal
     void interrupt()
     {
         if (pid_ <= 0)
-            return ;
+            return;
         error_code ec;
         interrupt(ec);
         if (ec)
@@ -165,7 +165,7 @@ struct basic_process_handle_signal
     void request_exit(error_code &ec)
     {
         if (pid_ <= 0)
-            return ;
+            return;
         if (::kill(pid_, SIGTERM) == -1)
             ec = get_last_error();
     }
@@ -173,17 +173,53 @@ struct basic_process_handle_signal
     void request_exit()
     {
         if (pid_ <= 0)
-            return ;
+            return;
         error_code ec;
         request_exit(ec);
         if (ec)
             detail::throw_error(ec, "request_exit");
     }
 
+    void suspend()
+    {
+        if (pid_ <= 0)
+            return;
+        error_code ec;
+        suspend(ec);
+        if (ec)
+            detail::throw_error(ec, "suspend");
+    }
+
+    void suspend(error_code &ec)
+    {
+        if (pid_ <= 0)
+            return;
+        if (::kill(pid_, SIGCONT) == -1)
+            ec = get_last_error();
+    }
+
+    void resume()
+    {
+        if (pid_ <= 0)
+            return;
+        error_code ec;
+        resume(ec);
+        if (ec)
+            detail::throw_error(ec, "resume");
+    }
+
+    void resume(error_code &ec)
+    {
+        if (pid_ <= 0)
+            return;
+        if (::kill(pid_, SIGTERM) == -1)
+            ec = get_last_error();
+    }
+
     void terminate(native_exit_code_type &exit_status, error_code &ec)
     {
         if (pid_ <= 0)
-            return ;
+            return;
         if (::kill(pid_, SIGKILL) == -1)
             ec = get_last_error();
     }
@@ -191,7 +227,7 @@ struct basic_process_handle_signal
     void terminate(native_exit_code_type &exit_status)
     {
         if (pid_ <= 0)
-            return ;
+            return;
         error_code ec;
         terminate(exit_status, ec);
         if (ec)
@@ -284,7 +320,7 @@ struct basic_process_handle_signal
             if (!ec && (wait_res == 0))
             {
                 handle.async_wait(std::move(self));
-                return ;
+                return;
             }
 
             struct completer

include/boost/process/v2/detail/process_handle_windows.hpp

@@ -32,6 +32,8 @@ BOOST_PROCESS_V2_DECL void terminate_if_running_(void * handle);
 BOOST_PROCESS_V2_DECL bool check_handle_(void* handle, error_code & ec);
 BOOST_PROCESS_V2_DECL bool check_pid_(pid_type pid_, error_code & ec);
 BOOST_PROCESS_V2_DECL void interrupt_(pid_type pid_, error_code & ec);
+BOOST_PROCESS_V2_DECL void suspend_(void * handle, error_code & ec);
+BOOST_PROCESS_V2_DECL void resume_(void * handle, error_code & ec);
 BOOST_PROCESS_V2_DECL void terminate_(void * handle, error_code & ec, native_exit_code_type & exit_code);
 BOOST_PROCESS_V2_DECL void request_exit_(pid_type pid_, error_code & ec);
 BOOST_PROCESS_V2_DECL void check_running_(void* handle, error_code & ec, native_exit_code_type & exit_status);
@@ -87,17 +89,16 @@ struct basic_process_handle_win
     {
     }
 
-    basic_process_handle_win(basic_process_handle_win && handle)
+    basic_process_handle_win(basic_process_handle_win && handle) 
+        :  pid_(handle.id()), handle_(std::move(handle.handle_))
     {
-        pid_ = handle.id();
-        handle_ = std::move(handle.handle_);
         handle.pid_ = static_cast<DWORD>(-1);
     }
 
     basic_process_handle_win& operator=(basic_process_handle_win && handle)
     {
         pid_ = handle.pid_;
-        handle_ = std::mopve(handle_))
+        handle_ = std::move(handle.handle_);
         handle.pid_ = static_cast<DWORD>(-1);
         return *this;
     }
@@ -166,7 +167,6 @@ struct basic_process_handle_win
     {
         if (!detail::check_pid_(pid_, ec))
             return;
-
         detail::request_exit_(pid_, ec);
     }
 
@@ -178,6 +178,32 @@ struct basic_process_handle_win
             detail::throw_error(ec, "request_exit");
     }
 
+    void suspend(error_code &ec)
+    {
+        detail::suspend_(handle_.native_handle(), ec);
+    }
+
+    void suspend()
+    {
+        error_code ec;
+        suspend(ec);
+        if (ec)
+            detail::throw_error(ec, "suspend");
+    }
+
+    void resume(error_code &ec)
+    {
+        detail::resume_(handle_.native_handle(), ec);
+    }
+
+    void resume()
+    {
+        error_code ec;
+        suspend(ec);
+        if (ec)
+            detail::throw_error(ec, "resume");
+    }
+
     void terminate(native_exit_code_type &exit_status, error_code &ec)
     {
         if (!detail::check_handle_(handle_.native_handle(), ec))

include/boost/process/v2/environment.hpp

@@ -524,7 +524,7 @@ struct key
     ~key() = default;
 
     key& operator=( const key& p ) = default;
-    key& operator=( key&& p ) noexcept = default;
+    key& operator=( key&& p ) noexcept(std::is_nothrow_move_constructible<string_type>::value) = default;
     key& operator=( string_type&& source )
     {
         value_ = std::move(source);
@@ -742,7 +742,7 @@ struct value
     ~value() = default;
 
     value& operator=( const value& p ) = default;
-    value& operator=( value&& p ) noexcept = default;
+    value& operator=( value&& p ) noexcept(std::is_nothrow_move_constructible<string_type>::value) = default;
     value& operator=( string_type&& source )
     {
         value_ = std::move(source);
@@ -979,7 +979,8 @@ struct key_value_pair
          const std::pair<Key, Value> & kv/*,
          typename std::enable_if<std::is_constructible<struct key,   Key >::value && 
                                  std::is_constructible<struct value, Value>::value
-                >::type = 0*/) : value_(((struct key)(kv.first)).string() + equality_sign + ((struct value)(kv.second)).string())
+                >::type = 0*/) : value_(((struct key)(kv.first)).basic_string<char_type, traits_type>() + equality_sign 
+                                      + ((struct value)(kv.second)).basic_string<char_type, traits_type>())
     {}
 
     key_value_pair(const typename conditional<is_same<value_type, char>::value, wchar_t, char>::type  * raw)
@@ -998,7 +999,7 @@ struct key_value_pair
     ~key_value_pair() = default;
 
     key_value_pair& operator=( const key_value_pair& p ) = default;
-    key_value_pair& operator=( key_value_pair&& p ) noexcept = default;
+    key_value_pair& operator=( key_value_pair&& p ) noexcept(std::is_nothrow_move_constructible<string_type>::value) = default;
     key_value_pair& operator=( string_type&& source )
     {
         value_ = std::move(source);
@@ -1045,6 +1046,7 @@ struct key_value_pair
 
     operator string_type() const {return native();}
     operator string_view_type() const {return native_view();}
+    operator typename string_view_type::string_view_type() const {return native_view();}
     operator key_value_pair_view() const {return native_view();}
 
     int compare( const key_value_pair& p ) const noexcept 
@@ -1432,8 +1434,9 @@ auto find_key(Environment & env, key_view ky)
 template<typename Environment = current_view>
 inline filesystem::path home(Environment && env = current())
 {
-#if defined(ASIO_WINDOWS)
-  return detail::find_key(env, L"HOMEDRIVE") + detail::find_key(env, L"HOMEPATH").native_string();
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+  return detail::find_key(env, L"HOMEDRIVE").native_string() 
+       + detail::find_key(env, L"HOMEPATH").native_string();
 #else
   return detail::find_key(env, "HOME").native_string();
 #endif
@@ -1468,7 +1471,7 @@ inline BOOST_PROCESS_V2_NAMESPACE::filesystem::path find_executable(
         // first check if it has the extension already
         BOOST_PROCESS_V2_NAMESPACE::filesystem::path full_nm(name);
         BOOST_PROCESS_V2_NAMESPACE::filesystem::path pp(pp_view.begin(), pp_view.end());
-        auto p = pp / nm;
+        auto p = pp / full_nm;
         error_code ec;
 
         if (detail::is_executable(p, ec) && !ec)
@@ -1695,67 +1698,52 @@ struct process_environment
 
 
   template<typename Args>
-  void build_env(Args && args, string_view rs)
+  static
+  std::vector<wchar_t> build_env(Args && args,
+                                      typename std::enable_if<
+                                              std::is_convertible<
+                                                      decltype(*std::begin(std::declval<Args>())),
+                                                      wcstring_ref>::value>::type * = nullptr)
   {
-    std::size_t length = 0u;
-    for (string_view v : args)
-      length += detail::size_as_wide(v.data(), v.size(), ec) + 1u;
+    std::vector<wchar_t> res;
+    std::size_t sz = 1;
+    for (wcstring_ref cs : std::forward<Args>(args))
+        sz =+ cs.size() + 1;
+    res.reserve(sz);
+    
+    for (wcstring_ref cs : std::forward<Args>(args))
+        res.insert(res.end(), cs.begin(), std::next(cs.end()));
+        
 
-    if (ec)
-        return;
-    length ++ ;
-
-    unicode_env.resize(length);
-
-    auto itr = &unicode_env.front();
-    for (string_view v : args)
-    {
-        itr += detail::convert_to_wide(
-                        v.data(), v.size(), 
-                        itr, &unicode_env.back() - itr, 
-                        ec);
-      if (ec)
-        break;
-      *(itr++) = '\0';
-    }
-    unicode_env.back() = '\0';
-  }
-  template<typename Args>
-  void build_env(Args && args, wstring_view rs)
-  {
-    std::size_t length = 0u;
-    for (const auto & v : std::forward<Args>(args))
-      length += v.size() + 1u;
- 
-    length ++ ;
-
-    unicode_env.resize(length);
-
-    auto itr = unicode_env.begin();
-    for (wstring_view v : args )
-    {
-      itr = std::copy(v.begin(), v.end(), itr);
-      *(itr++) = L'\0';
-    }
-    unicode_env.back() = L'\0';
+    res.push_back(L'\0');
+    return res;
   }
 
+  template<typename Args>
+  std::vector<wchar_t> build_env(Args && args,
+                                      typename std::enable_if<
+                                              !std::is_convertible<
+                                                      decltype(*std::begin(std::declval<Args>())),
+                                                      wcstring_ref>::value>::type * = nullptr)
+  {
+    for (auto && arg: std::forward<Args>(args))
+      env_buffer.emplace_back(arg);
+    return build_env(env_buffer);
+  }
 
-  process_environment(std::initializer_list<string_view> sv)  { build_env(sv,  ""); }
-  process_environment(std::initializer_list<wstring_view> sv) { build_env(sv, L""); }
+  process_environment(std::initializer_list<string_view> sv)  : unicode_env{build_env(sv,  "")} {}
+  process_environment(std::initializer_list<wstring_view> sv) : unicode_env{build_env(sv, L"")} {}
 
   template<typename Args>
-  process_environment(Args && args)
+  process_environment(Args && args) : unicode_env{build_env(std::forward<Args>(args))}
   {
-    if (std::begin(args) != std::end(args))
-      build_env(std::forward<Args>(args), *std::begin(args));
   }
 
   error_code error() {return ec;}
   error_code ec;
+  std::vector<environment::key_value_pair> env_buffer;
   std::vector<wchar_t> unicode_env;
 
-
   error_code on_setup(windows::default_launcher & launcher,
                       const filesystem::path &, const std::wstring &);
 

include/boost/process/v2/exit_code.hpp

@@ -12,6 +12,15 @@
 #define BOOST_PROCESS_V2_EXIT_CODE_HPP
 
 #include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/error.hpp>
+
+#if defined(BOOST_PROCESS_V2_STANDALONE)
+#include <asio/associator.hpp>
+#include <asio/async_result.hpp>
+#else
+#include <boost/asio/associator.hpp>
+#include <boost/asio/async_result.hpp>
+#endif 
 
 #if defined(BOOST_PROCESS_V2_POSIX)
 #include <sys/wait.h>
@@ -85,6 +94,157 @@ inline int evaluate_exit_code(int code)
 
 #endif
 
+
+/** Convert the exit-code in a completion into an error if the actual error isn't set.
+ * @code {.cpp}
+ * process proc{ctx, "exit", {"1"}};
+ * 
+ * proc.async_wait(code_as_error(
+ *    [](error_code ec)
+ *    {
+ *      assert(ec.value() == 10);
+ *      assert(ec.category() == error::get_exit_code_category());
+ *    }));
+ * 
+ * @endcode
+ */ 
+template<typename CompletionToken>
+struct code_as_error_t
+{
+    CompletionToken token_;
+    const error_category & category;
+
+    template<typename Token_>
+    code_as_error_t(Token_ && token, const error_category & category)
+        : token_(std::forward<Token_>(token)), category(category)
+    {
+    }
+};
+
+/// Deduction function for code_as_error_t.
+template<typename CompletionToken>
+code_as_error_t<CompletionToken> code_as_error(
+        CompletionToken && token, 
+        const error_category & category = error::get_exit_code_category())
+{
+  return code_as_error_t<typename std::decay<CompletionToken>::type>(
+      std::forward<CompletionToken>(token), category);
+};
+
+namespace detail
+{
+
+template<typename Handler>
+struct code_as_error_handler
+{
+  typedef void result_type;
+
+  template<typename H>
+  code_as_error_handler(H && h, const error_category & category) 
+      : handler_(std::forward<H>(h)), category(category) 
+  {
+  }
+
+  void operator()(error_code ec, native_exit_code_type code)
+  {
+    if (!ec)
+      BOOST_PROCESS_V2_ASSIGN_EC(ec, code, category)
+    std::move(handler_)(ec);
+  }
+
+
+  Handler handler_;
+  const error_category & category;
+};
+
+}
+
+
 BOOST_PROCESS_V2_END_NAMESPACE
 
+
+#if !defined(BOOST_PROCESS_V2_STANDALONE)
+namespace boost
+{
+#endif
+namespace asio
+{
+
+template <typename CompletionToken>
+struct async_result<
+    BOOST_PROCESS_V2_NAMESPACE::code_as_error_t<CompletionToken>,
+      void(BOOST_PROCESS_V2_NAMESPACE::error_code,
+           BOOST_PROCESS_V2_NAMESPACE::native_exit_code_type)>
+{
+  using signature = void(BOOST_PROCESS_V2_NAMESPACE::error_code);
+  using return_type = typename async_result<CompletionToken, void(BOOST_PROCESS_V2_NAMESPACE::error_code)>::return_type;
+  
+
+  template <typename Initiation>
+  struct init_wrapper
+  {
+    init_wrapper(Initiation init)
+      : initiation_(std::move(init))
+    {
+    }
+
+    template <typename Handler, typename... Args>
+    void operator()(
+        Handler && handler,
+        const BOOST_PROCESS_V2_NAMESPACE::error_category & cat,
+        Args && ... args)
+    {
+          std::move(initiation_)(
+            BOOST_PROCESS_V2_NAMESPACE::detail::code_as_error_handler<typename decay<Handler>::type>(
+              std::forward<Handler>(handler), cat),
+              std::forward<Args>(args)...);
+    }
+
+    Initiation initiation_;
+
+  };
+
+  template <typename Initiation, typename RawCompletionToken, typename... Args>
+  static BOOST_PROCESS_V2_INITFN_DEDUCED_RESULT_TYPE(CompletionToken, signature,
+      (async_initiate<CompletionToken, signature>(
+        declval<init_wrapper<typename decay<Initiation>::type> >(),
+        declval<CompletionToken&>(),
+        declval<BOOST_ASIO_MOVE_ARG(Args)>()...)))
+  initiate(
+      Initiation && initiation,
+      RawCompletionToken && token,
+      Args &&... args)
+  {
+    return async_initiate<CompletionToken, signature>(
+        init_wrapper<typename decay<Initiation>::type>(
+          std::forward<Initiation>(initiation)),
+          token.token_,
+          token.category,
+          std::forward<Args>(args)...);
+  }
+};
+
+
+
+
+template<template <typename, typename> class Associator, typename Handler, typename DefaultCandidate>
+struct associator<Associator,
+    BOOST_PROCESS_V2_NAMESPACE::detail::code_as_error_handler<Handler>, DefaultCandidate>
+  : Associator<Handler, DefaultCandidate>
+{
+  static typename Associator<Handler, DefaultCandidate>::type get(
+      const BOOST_PROCESS_V2_NAMESPACE::detail::code_as_error_handler<Handler> & h,
+      const DefaultCandidate& c = DefaultCandidate()) noexcept
+  {
+    return Associator<Handler, DefaultCandidate>::get(h.handler_, c);
+  }
+};
+
+
+}
+#if !defined(BOOST_PROCESS_V2_STANDALONE)
+} // boost
+#endif
+
+
 #endif //BOOST_PROCESS_V2_EXIT_CODE_HPP

include/boost/process/v2/ext.hpp

@@ -0,0 +1,16 @@
+//
+// Copyright (c) 2023 Klemens Morgenstern (klemens.morgenstern@gmx.net)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_PROCESS_V2_EXT_HPP
+#define BOOST_PROCESS_V2_EXT_HPP
+
+#include <boost/process/v2/ext/cmd.hpp>
+#include <boost/process/v2/ext/cwd.hpp>
+#include <boost/process/v2/ext/env.hpp>
+#include <boost/process/v2/ext/exe.hpp>
+
+#endif //BOOST_PROCESS_V2_EXT_HPP

include/boost/process/v2/ext/cmd.hpp

@@ -0,0 +1,66 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_PROCESS_V2_CMD_HPP
+#define BOOST_PROCESS_V2_CMD_HPP
+
+#include <string>
+#include <vector>
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+#include <boost/process/v2/process_handle.hpp>
+#include <boost/process/v2/pid.hpp>
+
+#include <boost/process/v2/shell.hpp>
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace ext {
+
+/// @{
+/// Get the argument vector of another process
+BOOST_PROCESS_V2_DECL shell cmd(pid_type pid, error_code & ec);
+BOOST_PROCESS_V2_DECL shell cmd(pid_type pid);
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+BOOST_PROCESS_V2_DECL shell cmd(HANDLE handle, error_code & ec);
+BOOST_PROCESS_V2_DECL shell cmd(HANDLE handle);
+#endif
+
+template<typename Executor>
+BOOST_PROCESS_V2_DECL shell cmd(basic_process_handle<Executor> & handle, error_code & ec)
+{
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+    return cmd(handle.native_handle(), ec);
+#else
+    return cmd(handle.id(), ec);
+#endif
+}
+
+template<typename Executor>
+BOOST_PROCESS_V2_DECL shell cmd(basic_process_handle<Executor> & handle)
+{
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+    return cmd(handle.native_handle());
+#else
+    return cmd(handle.id());
+#endif
+}
+
+/// @}
+
+} // namespace ext
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#if defined(BOOST_PROCESS_V2_HEADER_ONLY)
+
+#include <boost/process/v2/ext/impl/cmd.ipp>
+
+#endif
+
+
+#endif // BOOST_PROCESS_V2_CMD_HPP

include/boost/process/v2/ext/cwd.hpp

@@ -0,0 +1,59 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_PROCESS_V2_CWD_HPP
+#define BOOST_PROCESS_V2_CWD_HPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+
+#include <boost/process/v2/pid.hpp>
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace ext {
+
+/// @{
+/// Obtain the current path of another process
+BOOST_PROCESS_V2_DECL filesystem::path cwd(pid_type pid, error_code & ec);
+BOOST_PROCESS_V2_DECL filesystem::path cwd(pid_type pid);
+
+template<typename Executor>
+BOOST_PROCESS_V2_DECL filesystem::path cwd(basic_process_handle<Executor> & handle, error_code & ec)
+{
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+    return cwd(handle.native_handle(), ec);
+#else
+    return cwd(handle.id(), ec);
+#endif
+}
+
+template<typename Executor>
+BOOST_PROCESS_V2_DECL filesystem::path cwd(basic_process_handle<Executor> & handle)
+{
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+    return cwd(handle.native_handle());
+#else
+    return cwd(handle.id());
+#endif
+}
+
+/// @}
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+BOOST_PROCESS_V2_DECL filesystem::path cwd(HANDLE handle, error_code & ec);
+BOOST_PROCESS_V2_DECL filesystem::path cwd(HANDLE handle);
+#endif
+
+
+} // namespace ext
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#if defined(BOOST_PROCESS_V2_HEADER_ONLY)
+#include <boost/process/v2/ext/impl/cwd.ipp>
+#endif
+
+#endif // BOOST_PROCESS_V2_CWD_HPP

include/boost/process/v2/ext/detail/impl/proc_info.ipp

@@ -0,0 +1,127 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_PROCESS_V2_IMPL_DETAIL_PROC_INFO_IPP
+#define BOOST_PROCESS_V2_IMPL_DETAIL_PROC_INFO_IPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/last_error.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+#include <boost/process/v2/ext/detail/proc_info.hpp>
+
+#include <string>
+
+#if (defined(__APPLE__) && defined(__MACH__))
+#include <cstdlib>
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <sys/proc_info.h>
+#include <libproc.h>
+#endif
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace detail
+{
+
+namespace ext
+{
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+// type of process memory to read?
+enum MEMTYP {MEMCMD, MEMCWD};
+std::wstring cwd_cmd_from_proc(HANDLE proc, int type, boost::system::error_code & ec)
+{
+    std::wstring buffer;
+    PEB peb;
+    SIZE_T nRead = 0; 
+    ULONG len = 0;
+    PROCESS_BASIC_INFORMATION pbi;
+    RTL_USER_PROCESS_PARAMETERS_EXTENDED upp;
+
+    NTSTATUS status = 0;
+    PVOID buf = nullptr;
+    status = NtQueryInformationProcess(proc, ProcessBasicInformation, &pbi, sizeof(pbi), &len);
+    ULONG error = RtlNtStatusToDosError(status);
+
+    if (error)
+    {
+        BOOST_PROCESS_V2_ASSIGN_EC(ec, error, boost::system::system_category())
+        return {};
+    }
+
+    if (!ReadProcessMemory(proc, pbi.PebBaseAddress, &peb, sizeof(peb), &nRead))
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+
+    if (!ReadProcessMemory(proc, peb.ProcessParameters, &upp, sizeof(upp), &nRead))
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+
+    if (type == MEMCWD)
+    {
+        buf = upp.CurrentDirectory.DosPath.Buffer;
+        len = upp.CurrentDirectory.DosPath.Length;
+    }
+    else if (type == MEMCMD)
+    {
+        buf = upp.CommandLine.Buffer;
+        len = upp.CommandLine.Length;
+    }
+
+    buffer.resize(len / 2 + 1);
+
+    if (!ReadProcessMemory(proc, buf, &buffer[0], len, &nRead))
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+
+    buffer.pop_back();
+    return buffer;
+}
+
+// with debug_privilege enabled allows reading info from more processes
+// this includes stuff such as exe path, cwd path, cmdline, and environ
+HANDLE open_process_with_debug_privilege(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    HANDLE proc = nullptr;
+    HANDLE hToken = nullptr;
+    LUID luid;
+    TOKEN_PRIVILEGES tkp;
+    if (OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
+    {
+        if (LookupPrivilegeValue(nullptr, SE_DEBUG_NAME, &luid))
+        {
+            tkp.PrivilegeCount = 1;
+            tkp.Privileges[0].Luid = luid;
+            tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
+            if (AdjustTokenPrivileges(hToken, false, &tkp, sizeof(tkp), nullptr, nullptr))
+            {
+                proc = OpenProcess(PROCESS_ALL_ACCESS, false, pid);
+            }
+        }
+        CloseHandle(hToken);
+    }
+    if (!proc)
+        proc = OpenProcess(PROCESS_ALL_ACCESS, false, pid);
+    if (!proc)
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return proc;
+}
+#endif
+
+} // namespace ext
+
+} // namespace detail
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#endif // BOOST_PROCESS_V2_IMPL_DETAIL_PROC_INFO_IPP
+

include/boost/process/v2/ext/detail/proc_info.hpp

@@ -0,0 +1,125 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_PROCESS_V2_DETAIL_PROC_INFO_HPP
+#define BOOST_PROCESS_V2_DETAIL_PROC_INFO_HPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+#include <boost/process/v2/pid.hpp>
+
+#include <string>
+#include <vector>
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+#include <iterator>
+#include <algorithm>
+#include <windows.h>
+#include <winternl.h>
+extern "C" ULONG NTAPI RtlNtStatusToDosError(NTSTATUS Status);
+#endif
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace detail
+{
+
+namespace ext 
+{
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+#if !defined(_MSC_VER)
+#pragma pack(push, 8)
+#else
+#include <pshpack8.h>
+#endif
+
+/* CURDIR struct from:
+ https://github.com/processhacker/phnt/
+ CC BY 4.0 licence */
+
+typedef struct {
+  UNICODE_STRING DosPath;
+  HANDLE Handle;
+} CURDIR;
+
+/* RTL_DRIVE_LETTER_CURDIR struct from:
+ https://github.com/processhacker/phnt/
+ CC BY 4.0 licence */
+
+typedef struct {
+  USHORT Flags;
+  USHORT Length;
+  ULONG TimeStamp;
+  STRING DosPath;
+} RTL_DRIVE_LETTER_CURDIR;
+
+/* RTL_USER_PROCESS_PARAMETERS struct from:
+ https://github.com/processhacker/phnt/
+ CC BY 4.0 licence */
+
+typedef struct {
+  ULONG MaximumLength;
+  ULONG Length;
+  ULONG Flags;
+  ULONG DebugFlags;
+  HANDLE ConsoleHandle;
+  ULONG ConsoleFlags;
+  HANDLE StandardInput;
+  HANDLE StandardOutput;
+  HANDLE StandardError;
+  CURDIR CurrentDirectory;
+  UNICODE_STRING DllPath;
+  UNICODE_STRING ImagePathName;
+  UNICODE_STRING CommandLine;
+  PVOID Environment;
+  ULONG StartingX;
+  ULONG StartingY;
+  ULONG CountX;
+  ULONG CountY;
+  ULONG CountCharsX;
+  ULONG CountCharsY;
+  ULONG FillAttribute;
+  ULONG WindowFlags;
+  ULONG ShowWindowFlags;
+  UNICODE_STRING WindowTitle;
+  UNICODE_STRING DesktopInfo;
+  UNICODE_STRING ShellInfo;
+  UNICODE_STRING RuntimeData;
+  RTL_DRIVE_LETTER_CURDIR CurrentDirectories[32];
+  ULONG_PTR EnvironmentSize;
+  ULONG_PTR EnvironmentVersion;
+  PVOID PackageDependencyData;
+  ULONG ProcessGroupId;
+  ULONG LoaderThreads;
+  UNICODE_STRING RedirectionDllName;
+  UNICODE_STRING HeapPartitionName;
+  ULONG_PTR DefaultThreadpoolCpuSetMasks;
+  ULONG DefaultThreadpoolCpuSetMaskCount;
+} RTL_USER_PROCESS_PARAMETERS_EXTENDED;
+
+#if !defined(_MSC_VER)
+#pragma pack(pop)
+#else
+#include <poppack.h>
+#endif
+BOOST_PROCESS_V2_DECL std::wstring cwd_cmd_from_proc(HANDLE proc, int type, boost::system::error_code & ec);
+BOOST_PROCESS_V2_DECL HANDLE open_process_with_debug_privilege(boost::process::v2::pid_type pid, boost::system::error_code & ec);
+#endif
+
+} // namespace ext
+
+} // namespace detail
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#if defined(BOOST_PROCESS_V2_HEADER_ONLY)
+
+#include <boost/process/v2/ext/detail/impl/proc_info.ipp>
+
+#endif
+
+#endif // BOOST_PROCESS_V2_DETAIL_PROC_INFO_HPP
+

include/boost/process/v2/ext/env.hpp

@@ -0,0 +1,154 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_PROCESS_V2_ENV_HPP
+#define BOOST_PROCESS_V2_ENV_HPP
+#include <string>
+#include <vector>
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+#include <boost/process/v2/process_handle.hpp>
+#include <boost/process/v2/pid.hpp>
+
+#include <boost/process/v2/environment.hpp>
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace detail
+{
+namespace ext
+{
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+using native_env_handle_type = wchar_t *;
+using native_env_iterator = wchar_t *;
+#elif defined(__FreeBSD__)
+using native_env_handle_type = char **;
+using native_env_iterator = char **;
+#else
+using native_env_handle_type = char *;
+using native_env_iterator = char *;
+#endif
+
+struct native_env_handle_deleter
+{
+    BOOST_PROCESS_V2_DECL void operator()(native_env_handle_type) const;
+};
+
+BOOST_PROCESS_V2_DECL native_env_iterator next(native_env_iterator nh);
+BOOST_PROCESS_V2_DECL native_env_iterator find_end(native_env_iterator nh);
+BOOST_PROCESS_V2_DECL const environment::char_type * dereference(native_env_iterator iterator);
+
+} // namespace ext
+} // namespace detail
+
+namespace ext {
+
+/// The view of an environment
+struct env_view
+{
+    using native_handle_type = detail::ext::native_env_handle_type;
+    using value_type = environment::key_value_pair_view;
+
+    env_view() = default;
+    env_view(env_view && nt) = default;
+
+    native_handle_type native_handle() { return handle_.get(); }
+
+
+    struct iterator
+    {
+        using value_type        = environment::key_value_pair_view;
+        using difference_type   = int;
+        using reference         = environment::key_value_pair_view;
+        using pointer           = environment::key_value_pair_view;
+        using iterator_category = std::forward_iterator_tag;
+
+        iterator() = default;
+        iterator(const iterator & ) = default;
+        iterator(const detail::ext::native_env_iterator &native_handle) : iterator_(native_handle) {}
+
+        iterator & operator++()
+        {
+            iterator_ = detail::ext::next(iterator_);
+            return *this;
+        }
+
+        iterator operator++(int)
+        {
+            auto last = *this;
+            iterator_ = detail::ext::next(iterator_);
+            return last;
+        }
+        environment::key_value_pair_view operator*() const
+        {
+            return detail::ext::dereference(iterator_);
+        }
+
+        friend bool operator==(const iterator & l, const iterator & r) {return l.iterator_ == r.iterator_;}
+        friend bool operator!=(const iterator & l, const iterator & r) {return l.iterator_ != r.iterator_;}
+
+      private:
+        detail::ext::native_env_iterator iterator_;
+    };
+
+    iterator begin() const {return iterator(handle_.get());}
+    iterator   end() const {return iterator(detail::ext::find_end(handle_.get()));}
+
+  private:
+    friend BOOST_PROCESS_V2_DECL env_view env(pid_type pid, error_code & ec);
+    #if defined(BOOST_PROCESS_V2_WINDOWS)
+    friend BOOST_PROCESS_V2_DECL env_view env(HANDLE handle, error_code & ec);
+    #endif
+
+    std::unique_ptr<typename remove_pointer<detail::ext::native_env_handle_type>::type,
+            detail::ext::native_env_handle_deleter> handle_;
+};
+
+/// @{
+/// Get the environment of another process.
+BOOST_PROCESS_V2_DECL env_view env(pid_type pid, error_code & ec);
+BOOST_PROCESS_V2_DECL env_view env(pid_type pid);
+
+template<typename Executor>
+BOOST_PROCESS_V2_DECL env_view env(basic_process_handle<Executor> & handle, error_code & ec)
+{
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+    return env(handle.native_handle(), ec);
+#else
+    return env(handle.id(), ec);
+#endif
+}
+
+template<typename Executor>
+BOOST_PROCESS_V2_DECL env_view env(basic_process_handle<Executor> & handle)
+{
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+  return env(handle.native_handle());
+#else
+  return env(handle.id());
+#endif
+}
+
+/// @}
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+BOOST_PROCESS_V2_DECL env_view env(HANDLE handle, error_code & ec);
+BOOST_PROCESS_V2_DECL env_view env(HANDLE handle);
+#endif
+
+
+} // namespace ext
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#if defined(BOOST_PROCESS_V2_HEADER_ONLY)
+
+#include <boost/process/v2/ext/impl/env.ipp>
+
+#endif
+#endif // BOOST_PROCESS_V2_ENV_HPP

include/boost/process/v2/ext/exe.hpp

@@ -0,0 +1,62 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_PROCESS_V2_EXE_HPP
+#define BOOST_PROCESS_V2_EXE_HPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+
+#include <boost/process/v2/process_handle.hpp>
+#include <boost/process/v2/pid.hpp>
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace ext {
+
+/// @{
+/// Return the executable of another process by pid or handle.
+BOOST_PROCESS_V2_DECL filesystem::path exe(pid_type pid, error_code & ec);
+BOOST_PROCESS_V2_DECL filesystem::path exe(pid_type pid);
+
+
+
+template<typename Executor>
+filesystem::path exe(basic_process_handle<Executor> & handle, error_code & ec)
+{
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+    return exe(handle.native_handle(), ec);
+#else
+    return exe(handle.id(), ec);
+#endif
+}
+
+template<typename Executor>
+filesystem::path exe(basic_process_handle<Executor> & handle)
+{
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+    return exe(handle.native_handle());
+#else
+    return exe(handle.id());
+#endif
+}
+
+///@}
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+BOOST_PROCESS_V2_DECL filesystem::path exe(HANDLE handle, error_code & ec);
+BOOST_PROCESS_V2_DECL filesystem::path exe(HANDLE handle);
+#endif
+
+} // namespace ext
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#if defined(BOOST_PROCESS_V2_HEADER_ONLY)
+#include <boost/process/v2/ext/impl/exe.ipp>
+#endif
+
+#endif // BOOST_PROCESS_V2_EXE_HPP
+

include/boost/process/v2/ext/impl/cmd.ipp

@@ -0,0 +1,460 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_PROCESS_V2_IMPL_CMD_IPP
+#define BOOST_PROCESS_V2_IMPL_CMD_IPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/last_error.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+#include <boost/process/v2/ext/detail/proc_info.hpp>
+#include <boost/process/v2/ext/cmd.hpp>
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+#include <windows.h>
+#include <shellapi.h>
+#else
+#include <cstdlib>
+#endif
+
+#if (defined(__linux__) || defined(__ANDROID__))
+#include <cstdio>
+#endif
+
+#if defined(__FreeBSD__)
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/user.h>
+#include <libprocstat.h>
+#endif
+
+#if (defined(__DragonFly__) ||  defined(__OpenBSD__))
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <sys/user.h>
+#include <kvm.h>
+#endif
+
+#if defined(__NetBSD__)
+#include <sys/types.h>
+#include <kvm.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#endif
+
+#if defined(__sun)
+#include <sys/types.h>
+#include <kvm.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/proc.h>
+#endif
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+struct make_cmd_shell_
+{
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+    static shell make(std::wstring data)
+    {
+        shell res;
+        res.input_  = res.buffer_ = std::move(data);
+        res.parse_();
+        return res;
+    }
+#else
+    static shell make(std::string data,
+                      int argc, char ** argv,
+                      void(*free_func)(int, char**))
+    {
+        shell res;
+        res.argc_  = argc;
+        res.input_ = res.buffer_ = std::move(data);
+        res.argv_  = argv;
+        res.free_argv_ = free_func;
+
+        return res;
+    }
+
+    static shell clone(char ** cmd)
+    {
+        shell res;
+        res.argc_ = 0;
+        std::size_t str_lengths = 0;
+        for (auto c = cmd; *c != nullptr; c++)
+        {
+            res.argc_++;
+            str_lengths += (std::strlen(*c) + 1);
+        }
+        // yes, not the greatest solution.
+        res.buffer_.resize(str_lengths);
+
+        res.argv_ = new char*[res.argc_ + 1];
+        res.free_argv_ = +[](int argc, char ** argv) {delete[] argv;};
+        res.argv_[res.argc_] = nullptr;
+        auto p = &*res.buffer_.begin();
+
+        for (int i = 0; i < res.argc_; i++)
+        {
+            const auto ln = std::strlen(cmd[i]);
+            res.argv_[i] = std::strcpy(p, cmd[i]);
+            p += (ln + 1);
+        }
+
+        return res;
+    }
+
+#endif
+};
+
+namespace ext {
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+
+shell cmd(HANDLE proc, error_code & ec)
+{
+    std::wstring buffer = boost::process::v2::detail::ext::cwd_cmd_from_proc(proc, 0/*=MEMCMD*/, ec);
+
+    if (!ec)
+        return make_cmd_shell_::make(std::move(buffer));
+    else
+        return {};
+}
+
+shell cmd(HANDLE proc)
+{
+    boost::system::error_code ec;
+    auto res = cmd(proc, ec);
+    if (ec)
+        detail::throw_error(ec, "cmd");
+    return res;
+}
+
+shell cmd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    struct del
+    {
+        void operator()(HANDLE h)
+        {
+            ::CloseHandle(h);
+        };
+    };
+    std::unique_ptr<void, del> proc{detail::ext::open_process_with_debug_privilege(pid, ec)};
+    if (proc == nullptr)
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    else
+        return cmd(proc.get(), ec);
+
+}
+    
+#elif (defined(__APPLE__) && defined(__MACH__))
+
+shell cmd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    int mib[3] = {CTL_KERN, KERN_ARGMAX, 0};
+    int argmax = 0;
+    auto size = sizeof(argmax);
+    if (sysctl(mib, 2, &argmax, &size, nullptr, 0) == -1)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+
+    std::string procargs;
+    procargs.resize(argmax - 1);
+    mib[1] = KERN_PROCARGS;
+    mib[2] = pid;
+
+    size = argmax;
+
+    if (sysctl(mib, 3, &*procargs.begin(), &size, nullptr, 0) != 0)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+
+    int argc = *reinterpret_cast<const int*>(procargs.data());
+    auto itr = procargs.begin() + sizeof(argc);
+
+    std::unique_ptr<char*[]> argv{new char*[argc + 1]};
+    const auto end = procargs.end();
+
+    argv[argc] = nullptr; //args is a null-terminated list
+
+    for (auto n = 0u; n <= argc; n++)
+    {
+        auto e = std::find(itr, end, '\0');
+        if (e == end && n < argc) // something off
+        {
+            BOOST_PROCESS_V2_ASSIGN_EC(ec, EINVAL, system_category())
+            return {};
+        }
+        argv[n] = &*itr;
+        itr = e + 1; // start searching start
+    }
+
+    auto fr_func = +[](int argc, char ** argv) {delete [] argv;};
+
+    return make_cmd_shell_::make(std::move(procargs), argc, argv.release(), fr_func);
+}
+    
+#elif (defined(__linux__) || defined(__ANDROID__))
+
+shell cmd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    std::string procargs;
+    procargs.resize(4096);
+    int f = ::open(("/proc/" + std::to_string(pid) + "/cmdline").c_str(), O_RDONLY);
+
+    while (procargs.back() != EOF)
+    {
+        auto r = ::read(f, &*(procargs.end() - 4096), 4096);
+        if (r < 0)
+        {
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+            ::close(f);
+            return {};
+        }
+        if (r < 4096) // done!
+        {
+            procargs.resize(procargs.size() - 4096 + r);
+            break;
+        }
+        procargs.resize(procargs.size() + 4096);
+    }
+    ::close(f);
+
+    if (procargs.back() == EOF)
+        procargs.pop_back();
+
+    auto argc = std::count(procargs.begin(), procargs.end(), '\0');
+
+    auto itr = procargs.begin();
+
+    std::unique_ptr<char*[]> argv{new char*[argc + 1]};
+    const auto end = procargs.end();
+
+    argv[argc] = nullptr; //args is a null-terminated list
+
+
+    for (auto n = 0u; n <= argc; n++)
+    {
+        auto e = std::find(itr, end, '\0');
+        if (e == end && n < argc) // something off
+        {
+            BOOST_PROCESS_V2_ASSIGN_EC(ec, EINVAL, system_category())
+            return {};
+        }
+        argv[n] = &*itr;
+        itr = e + 1; // start searching start
+    }
+
+    auto fr_func = +[](int argc, char ** argv) {delete [] argv;};
+
+    return make_cmd_shell_::make(std::move(procargs), argc, argv.release(), fr_func);
+}
+    
+#elif defined(__FreeBSD__)
+
+shell cmd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    struct cl_proc_stat
+    {
+        void operator()(struct procstat *proc_stat)
+        {
+            procstat_close(proc_stat);
+        }
+    };
+    std::unique_ptr<struct procstat, cl_proc_stat> proc_stat{procstat_open_sysctl()};
+    if (!proc_stat)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+
+    struct proc_info_close
+    {
+        struct procstat * proc_stat;
+
+        void operator()(struct kinfo_proc * proc_info)
+        {
+            procstat_freeprocs(proc_stat, proc_info);
+        }
+    };
+
+    unsigned cntp;
+    std::unique_ptr<struct kinfo_proc, proc_info_close> proc_info{
+            procstat_getprocs(proc_stat.get(), KERN_PROC_PID, pid, &cntp),
+            proc_info_close{proc_stat.get()}};
+
+    if (!proc_info)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+
+    char **cmd = procstat_getargv(proc_stat.get(), proc_info.get(), 0);
+    if (!cmd)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+    auto res = make_cmd_shell_::clone(cmd);
+    procstat_freeargv(proc_stat.get());
+    return res;
+}
+    
+#elif defined(__DragonFly__)
+
+shell cmd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    int cntp = 0;
+    kinfo_proc *proc_info = nullptr;
+    const char *nlistf, *memf;
+    nlistf = memf = "/dev/null";
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nlistf, memf, nullptr, O_RDONLY, nullptr)};
+    if (!kd) {BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec) return {};}
+    if ((proc_info = kvm_getprocs(kd.get(), KERN_PROC_PID, pid, &cntp))) 
+    {
+        char **cmd = kvm_getargv(kd.get(), proc_info, 0);
+        if (cmd)
+            return make_cmd_shell_::clone(cmd);
+        else
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return {};
+}
+    
+#elif defined(__NetBSD__)
+
+shell cmd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+
+    std::vector<std::string> vec;
+    int cntp = 0;
+    kinfo_proc2 *proc_info = nullptr;
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nullptr, nullptr, nullptr, KVM_NO_FILES, nullptr)};
+
+    if (!kd) {BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec) return vec;}
+    if ((proc_info = kvm_getproc2(kd.get(), KERN_PROC_PID, pid, sizeof(struct kinfo_proc2), &cntp))) 
+    {
+        char **cmd = kvm_getargv2(kd.get(), proc_info, 0);
+        if (cmd)
+            return make_cmd_shell_::clone(cmd);
+        else
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return vec;
+}
+    
+#elif defined(__OpenBSD__)
+
+shell cmd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    std::vector<std::string> vec;
+    int cntp = 0;
+    kinfo_proc *proc_info = nullptr;
+
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nullptr, nullptr, nullptr, KVM_NO_FILES, nullptr)};
+    if (!kd) {BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec) return vec;}
+    if ((proc_info = kvm_getprocs(kd.get(), KERN_PROC_PID, pid, sizeof(struct kinfo_proc), &cntp))) 
+    {
+        char **cmd = kvm_getargv(kd.get(), proc_info, 0);
+        if (cmd)
+            return make_cmd_shell_::clone(cmd);
+        else
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    kvm_close(kd);
+    return {};
+}
+    
+#elif defined(__sun)
+
+shell cmd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    char **cmd = nullptr;
+    proc *proc_info = nullptr;
+    user *proc_user = nullptr;
+    kd = kvm_open(nullptr, nullptr, nullptr, O_RDONLY, nullptr);
+    if (!kd) {BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec) return {};}
+    if ((proc_info = kvm_getproc(kd, pid))) 
+    {
+        if ((proc_user = kvm_getu(kd, proc_info))) 
+        {
+            if (!kvm_getcmd(kd, proc_info, proc_user, &cmd, nullptr)) 
+            {
+                int argc = 0;
+                for (int i = 0; cmd[i] != nullptr; i++)
+                    argc ++;
+                return make_cmd_shell_::make(
+                        {}, argc, cmd,
+                        +[](int, char ** argv) {::free(argv);})
+            }
+            else
+                BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        }
+        else
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    
+    kvm_close(kd);
+    return {};
+}
+
+#else
+#error "Platform not supported"
+#endif
+
+shell cmd(boost::process::v2::pid_type pid)
+{
+    boost::system::error_code ec;
+    auto res = cmd(pid, ec);
+    if (ec)
+            detail::throw_error(ec, "cmd");
+    return res;
+}
+
+} // namespace ext
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#endif // BOOST_PROCESS_V2_IMPL_CMD_IPP
+

include/boost/process/v2/ext/impl/cwd.ipp

@@ -0,0 +1,234 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_PROCESS_V2_IMPL_CWD_IPP
+#define BOOST_PROCESS_V2_IMPL_CWD_IPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/last_error.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+#include <boost/process/v2/ext/detail/proc_info.hpp>
+#include <boost/process/v2/ext/cwd.hpp>
+
+#include <string>
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+#include <windows.h>
+#else
+#include <climits>
+#endif
+
+#if (defined(__APPLE__) && defined(__MACH__))
+#include <sys/proc_info.h>
+#include <libproc.h>
+#endif
+
+#if (defined(BOOST_PROCESS_V2_WINDOWS) || defined(__linux__) || defined(__ANDROID__) || defined(__sun))
+#include <cstdlib>
+#endif
+
+#if defined(__FreeBSD__)
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+#include <sys/param.h>
+#include <sys/queue.h>
+#include <sys/user.h>
+#include <libprocstat.h>
+#endif
+
+#if (defined(__NetBSD__) || defined(__OpenBSD__))
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#endif
+
+#if defined(__DragonFly__)
+#include <cstring>
+#include <cstdio>
+#endif
+
+#ifdef BOOST_PROCESS_USE_STD_FS
+namespace filesystem = std::filesystem;
+#else
+namespace filesystem = boost::filesystem;
+#endif
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace ext {
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+
+filesystem::path cwd(HANDLE proc, boost::system::error_code & ec)
+{
+    auto buffer = boost::process::v2::detail::ext::cwd_cmd_from_proc(proc, 1/*=MEMCWD*/, ec);
+    if (!buffer.empty())
+      return filesystem::canonical(buffer, ec);
+    else 
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return "";
+}
+
+filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    struct del
+    {
+        void operator()(HANDLE h)
+        {
+            ::CloseHandle(h);
+        };
+    };
+    std::unique_ptr<void, del> proc{detail::ext::open_process_with_debug_privilege(pid, ec)};
+    if (proc == nullptr)
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    else
+        return cwd(proc.get(), ec);
+    return {};
+}
+
+filesystem::path cwd(HANDLE proc)
+{
+    boost::system::error_code ec;
+    auto res = cwd(proc, ec);
+    if (ec)
+        detail::throw_error(ec, "cwd");
+    return res;
+}
+
+#elif (defined(__APPLE__) && defined(__MACH__))
+
+filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    proc_vnodepathinfo vpi;
+    if (proc_pidinfo(pid, PROC_PIDVNODEPATHINFO, 0, &vpi, sizeof(vpi)) > 0)
+        return filesystem::canonical(vpi.pvi_cdir.vip_path, ec);
+    else
+      BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return "";
+}
+
+#elif (defined(__linux__) || defined(__ANDROID__) || defined(__sun))
+
+filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    return filesystem::canonical(
+                filesystem::path("/proc") /  std::to_string(pid) / "cwd", ec);
+}
+
+#elif defined(__FreeBSD__)
+
+// FIXME: Add error handling.
+filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code & ec) 
+{
+    filesystem::path path;
+    unsigned cntp = 0;
+    procstat *proc_stat = procstat_open_sysctl();
+    if (proc_stat) {
+        kinfo_proc *proc_info = procstat_getprocs(proc_stat, KERN_PROC_PID, pid, &cntp);
+        if (proc_info) {
+            filestat_list *head = procstat_getfiles(proc_stat, proc_info, 0);
+            if (head) {
+                filestat *fst = nullptr;
+                STAILQ_FOREACH(fst, head, next) {
+                    if (fst->fs_uflags & PS_FST_UFLAG_CDIR) 
+                    {
+                        path = filesystem::canonical(fst->fs_path, ec);
+                    }
+                }
+                procstat_freefiles(proc_stat, head);
+            }
+            else
+                BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+            procstat_freeprocs(proc_stat, proc_info);
+        }
+        else
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        procstat_close(proc_stat);
+    }
+    else
+         BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return path;
+}
+
+#elif defined(__DragonFly__)
+
+// FIXME: Add error handling.
+filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code & ec) 
+{
+    filesystem::path path;
+    /* Probably the hackiest thing ever we are doing here, because the "official" API is broken OS-level. */
+    FILE *fp = popen(("pos=`ans=\\`/usr/bin/fstat -w -p " + std::to_string(pid) + " | /usr/bin/sed -n 1p\\`; " +
+        "/usr/bin/awk -v ans=\"$ans\" 'BEGIN{print index(ans, \"INUM\")}'`; str=`/usr/bin/fstat -w -p " + 
+        std::to_string(pid) + " | /usr/bin/sed -n 3p`; /usr/bin/awk -v str=\"$str\" -v pos=\"$pos\" " +
+        "'BEGIN{print substr(str, 0, pos + 4)}' | /usr/bin/awk 'NF{NF--};1 {$1=$2=$3=$4=\"\"; print" +
+        " substr($0, 5)'}").c_str(), "r");
+    if (fp) 
+    {
+        char buffer[PATH_MAX];
+        if (fgets(buffer, sizeof(buffer), fp)) 
+        {
+            std::string str = buffer;
+            std::size_t pos = str.find("\n", strlen(buffer) - 1);
+            if (pos != std::string::npos) 
+            {
+                str.replace(pos, 1, "");
+            }
+            path = filesystem::canonical(str.c_str(), ec);
+        }
+        else
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        pclose(fp);
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return path;
+}
+
+#elif (defined(__NetBSD__) || defined(__OpenBSD__))
+
+filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    std::string path;
+#if defined(__NetBSD__)
+    int mib[4] = {CTL_KERN, KERN_PROC_ARGS, pid, KERN_PROC_CWD};
+    const std::size_t sz = 4;
+#elif defined(__OpenBSD__)
+    int mib[3] = {CTL_KERN, KERN_PROC_CWD, pid};
+    const std::size_t sz = 3;
+#endif
+    std::size_t len = 0;
+    if (sysctl(mib, sz, nullptr, &len, nullptr, 0) == 0) 
+    {
+        std::string strbuff;
+        strbuff.resize(len);
+        if (sysctl(mib, 4, &strbuff[0], &len, nullptr, 0) == 0)
+        {
+            filesystem::canonical(strbuff, ec);
+        }
+        else
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    }
+
+    return "";
+}
+
+#else
+#error "Platform not supported"
+#endif
+
+filesystem::path cwd(boost::process::v2::pid_type pid)
+{
+    boost::system::error_code ec;
+    auto res = cwd(pid, ec);
+    if (ec)
+        detail::throw_error(ec, "cwd");
+    return res;
+}
+
+} // namespace ext
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#endif // BOOST_PROCESS_V2_IMPL_CWD_IPP
+

include/boost/process/v2/ext/impl/env.ipp

@@ -0,0 +1,389 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_PROCESS_V2_EXT_IMPL_ENV_IPP
+#define BOOST_PROCESS_V2_EXT_IMPL_ENV_IPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/last_error.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+#include <boost/process/v2/ext/detail/proc_info.hpp>
+#include <boost/process/v2/ext/env.hpp>
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+#include <shellapi.h>
+#else
+#include <cstdlib>
+#endif
+
+#if (defined(__linux__) || defined(__ANDROID__))
+#include <cstdio>
+#endif
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace detail {
+namespace ext {
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+
+void native_env_handle_deleter::operator()(native_env_handle_type h) const
+{
+    delete [] h;
+}
+
+native_env_iterator next(native_env_iterator nh)
+{
+    while (*nh != L'\0')
+        nh ++;
+    return ++nh ;
+}
+native_env_iterator find_end(native_env_iterator nh)
+{
+    while (*nh - 1 != L'\0' && *nh != L'\0')
+        nh ++;
+    return nh ;
+}
+
+const environment::char_type * dereference(native_env_iterator iterator)
+{
+    return iterator;
+}
+
+#elif (defined(__linux__) || defined(__ANDROID__))
+//linux stores this as a blob with an EOF at the end
+
+void native_env_handle_deleter::operator()(native_env_handle_type h) const
+{
+    delete [] h;
+}
+
+native_env_iterator next(native_env_iterator nh)
+{
+    while (*nh != '\0')
+        nh ++;
+    return ++nh ;
+}
+native_env_iterator find_end(native_env_iterator nh)
+{
+    while (*nh != EOF)
+        nh ++;
+    return nh ;
+}
+
+const environment::char_type * dereference(native_env_iterator iterator)
+{
+    return iterator;
+}
+
+#elif (defined(__APPLE___) || defined(__MACH__))
+
+void native_env_handle_deleter::operator()(native_env_handle_type h) const
+{
+    delete [] h;
+}
+
+native_env_iterator next(native_env_iterator nh)
+{
+    while (*nh != '\0')
+        nh ++;
+    return ++nh ;
+}
+native_env_iterator find_end(native_env_iterator nh)
+{
+    while (*nh - 1 != '\0' && *nh != '\0')
+        nh ++;
+    return nh ;
+}
+
+const environment::char_type * dereference(native_env_iterator iterator)
+{
+    return iterator;
+}
+
+
+#elif defined(__FreeBSD__)
+
+void native_env_handle_deleter::operator()(native_env_handle_type h) const
+{
+    delete [] h;
+}
+
+native_env_iterator next(native_env_iterator nh)
+{
+    return ++nh ;
+}
+native_env_iterator find_end(native_env_iterator nh)
+{
+    while (*nh != nullptr)
+      nh++;
+
+    return nh ;
+}
+
+const environment::char_type * dereference(native_env_iterator iterator)
+{
+    return *iterator;
+}
+
+#endif
+
+}
+}
+
+namespace ext
+{
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+
+env_view env(HANDLE proc, boost::system::error_code & ec)
+{
+    wchar_t *buffer = nullptr;
+    PEB peb;
+    SIZE_T nRead = 0; 
+    ULONG len = 0;
+    PROCESS_BASIC_INFORMATION pbi;
+    detail::ext::RTL_USER_PROCESS_PARAMETERS_EXTENDED upp;
+
+    NTSTATUS status = 0;
+    PVOID buf = nullptr;
+    status = NtQueryInformationProcess(proc, ProcessBasicInformation, &pbi, sizeof(pbi), &len);
+    ULONG error = RtlNtStatusToDosError(status);
+
+    if (error)
+    {
+        BOOST_PROCESS_V2_ASSIGN_EC(ec, error, boost::system::system_category())
+        return {};
+    }
+
+    if (!ReadProcessMemory(proc, pbi.PebBaseAddress, &peb, sizeof(peb), &nRead))
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+
+    if (!ReadProcessMemory(proc, peb.ProcessParameters, &upp, sizeof(upp), &nRead))
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+
+    env_view ev;
+    buf = upp.Environment;
+    len = (ULONG)upp.EnvironmentSize;
+    ev.handle_.reset(new wchar_t[len / 2 + 1]());
+
+    if (!ReadProcessMemory(proc, buf, ev.handle_.get(), len, &nRead))
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+
+    ev.handle_.get()[len / 2] = L'\0';
+    return ev;
+}
+
+env_view env(HANDLE handle)
+{
+    boost::system::error_code ec;
+    auto res = env(handle, ec);
+    if (ec)
+        detail::throw_error(ec, "env");
+    return res;
+}
+
+env_view env(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    struct del
+    {
+        void operator()(HANDLE h)
+        {
+            ::CloseHandle(h);
+        };
+    };
+    std::unique_ptr<void, del> proc{detail::ext::open_process_with_debug_privilege(pid, ec)};
+    if (proc == nullptr)
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    else
+	    return env(proc.get(), ec);
+
+	return {};
+}
+
+#elif (defined(__APPLE___) || defined(__MACH__))
+
+env_view env(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    int mib[3] = {CTL_KERN, KERN_ARGMAX, 0};
+    int argmax = 0;
+    auto size = sizeof(argmax);
+    if (sysctl(mib, 2, &argmax, &size, nullptr, 0) == -1)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+
+    std::string procargs;
+    procargs.resize(argmax - 1);
+    mib[1] = KERN_PROCARGS2;
+    mib[2] = pid;
+
+    size = argmax;
+
+    if (sysctl(mib, 3, &*procargs.begin(), &size, nullptr, 0) != 0)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+    std::uint32_t nargs;
+    memcpy(&nargs, &*procargs.begin(), sizeof(nargs));
+    char *cp = &*procargs.begin() + sizeof(nargs);
+
+    for (; cp < &*procargs.end(); cp++)
+        if (*cp == '\0')
+          break;
+
+
+    if (cp == &procargs[size])
+        return {};
+
+
+    for (; cp < &*procargs.end(); cp++)
+        if (*cp != '\0') break;
+
+
+    if (cp == &*procargs.end())
+        return {};
+
+
+    int i = 0;
+    char *sp = cp;
+    std::vector<char> vec;
+
+    while ((*sp != '\0' || i < nargs) && sp < &*procargs.end()) {
+        if (i >= nargs)
+            vec.push_back(*sp);
+
+        sp += 1;
+    }
+    
+    env_view ev;
+    ev.handle_.reset(new char[vec.size()]());
+    std::copy(vec.begin(), vec.end(), ev.handle_.get());
+    return ev;
+}
+
+#elif (defined(__linux__) || defined(__ANDROID__))
+
+env_view env(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    std::size_t size = 0;
+    std::unique_ptr<char, detail::ext::native_env_handle_deleter> procargs{};
+
+    int f = ::open(("/proc/" + std::to_string(pid) + "/environ").c_str(), O_RDONLY);
+
+    while (!procargs || procargs.get()[size - 1] != EOF)
+    {
+        std::unique_ptr<char, detail::ext::native_env_handle_deleter> buf{new char[size + 4096]};
+        if (size > 0)
+            std::memmove(buf.get(), procargs.get(), size);
+        auto r = ::read(f, buf.get() + size, 4096);
+        if (r < 0)
+        {
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+            ::close(f);
+            return {};
+        }
+        procargs = std::move(buf);
+        size += r;
+        if (r < 4096) // done!
+        {
+            procargs.get()[size] = EOF;
+            break;
+        }
+    }
+    ::close(f);
+
+    env_view ev;
+    ev.handle_ = std::move(procargs);
+    return ev;
+}
+
+#elif defined(__FreeBSD__)
+env_view env(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+  env_view ev;
+
+  unsigned cntp = 0;
+  procstat *proc_stat = procstat_open_sysctl();
+  if (proc_stat != nullptr)
+  {
+    kinfo_proc *proc_info = procstat_getprocs(proc_stat, KERN_PROC_PID, pid, &cntp);
+    if (proc_info != nullptr)
+    {
+      char **env = procstat_getenvv(proc_stat, proc_info, 0);
+      if (env != nullptr)
+      {
+        auto e = env;
+        std::size_t n = 0u, len = 0u;
+        while (e && *e != nullptr)
+        {
+          n ++;
+          len += std::strlen(*e);
+          e++;
+        }
+        std::size_t mem_needed =
+            // environ         -  nullptr       - strlen  + null terminators
+            (n * sizeof(char*)) + sizeof(char*) + len     + n;
+
+        char * out = new (std::nothrow) char[mem_needed];
+        if (out != nullptr)
+        {
+          auto eno = reinterpret_cast<char**>(out);
+          auto eeo = eno;
+            auto str = out +  (n * sizeof(char*)) + sizeof(char*);
+          e = env;
+          while (*e != nullptr)
+          {
+            auto len = std::strlen(*e) + 1u;
+            std::memcpy(str, *e, len);
+            *eno = str;
+            str += len;
+            eno ++;
+            e++;
+          }
+          *eno = nullptr;
+
+          ev.handle_.reset(eeo);
+        }
+        else
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+
+      }
+      procstat_freeprocs(proc_stat, proc_info);
+
+    }
+    else
+      BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    procstat_close(proc_stat);
+  }
+  else
+    BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+  return ev;
+}
+
+#endif
+
+env_view env(boost::process::v2::pid_type pid)
+{
+    boost::system::error_code ec;
+    auto res = env(pid, ec);
+    if (ec)
+        detail::throw_error(ec, "env");
+    return res;
+}
+}
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#endif //BOOST_PROCESS_V2_EXT_IMPL_ENV_IPP

include/boost/process/v2/ext/impl/exe.ipp

@@ -0,0 +1,193 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_PROCESS_V2_IMPL_EXE_IPP
+#define BOOST_PROCESS_V2_IMPL_EXE_IPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/last_error.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+#include <boost/process/v2/ext/detail/proc_info.hpp>
+#include <boost/process/v2/ext/exe.hpp>
+
+#include <string>
+#include <vector>
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+#include <windows.h>
+#else
+#include <climits>
+#endif
+
+#if (defined(__APPLE__) && defined(__MACH__))
+#include <sys/proc_info.h>
+#include <libproc.h>
+#endif
+
+#if (defined(BOOST_PROCESS_V2_WINDOWS) || defined(__linux__) || defined(__ANDROID__) || defined(__sun))
+#include <cstdlib>
+#endif
+
+#if (defined(__FreeBSD__) || defined(__DragonFly__) || defined(__NetBSD__))
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#if !defined(__FreeBSD__)
+#include <alloca.h>
+#endif
+#endif
+
+#if defined(__OpenBSD__)
+#include <boost/process/v2/ext/cwd.hpp>
+#include <boost/process/v2/ext/cmd.hpp>
+#include <boost/process/v2/ext/env.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/algorithm/string/split.hpp>
+#include <boost/algorithm/string/classification.hpp>
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <kvm.h>
+#endif
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace ext {
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+
+filesystem::path exe(HANDLE process_handle)
+{
+    boost::system::error_code ec;
+    auto res = exe(process_handle, ec);
+    if (ec)
+        detail::throw_error(ec, "exe");
+    return res;
+}
+
+
+filesystem::path exe(HANDLE proc, boost::system::error_code & ec)
+{
+    wchar_t buffer[MAX_PATH];
+    // On input, specifies the size of the lpExeName buffer, in characters.
+    DWORD size = MAX_PATH;
+    if (QueryFullProcessImageNameW(proc, 0, buffer, &size))
+    {
+        return filesystem::canonical(buffer, ec);
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+
+    return "";
+}
+
+filesystem::path exe(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    if (pid == GetCurrentProcessId())
+    {
+        wchar_t buffer[MAX_PATH];
+        if (GetModuleFileNameW(nullptr, buffer, sizeof(buffer))) 
+        {
+            return filesystem::canonical(buffer, ec);
+        }
+    } 
+    else 
+    {
+        struct del
+        {
+            void operator()(HANDLE h)
+            {
+                ::CloseHandle(h);
+            };
+        };
+        std::unique_ptr<void, del> proc{detail::ext::open_process_with_debug_privilege(pid, ec)};
+        if (proc == nullptr)
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        else
+            return exe(proc.get(), ec);
+    }
+    return "";
+}
+
+#elif (defined(__APPLE__) && defined(__MACH__))
+
+filesystem::path exe(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    char buffer[PROC_PIDPATHINFO_MAXSIZE];
+    if (proc_pidpath(pid, buffer, sizeof(buffer)) > 0) 
+    {
+        return filesystem::canonical(buffer, ec);
+    }
+    BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return "";
+}
+
+#elif (defined(__linux__) || defined(__ANDROID__) || defined(__sun))
+
+filesystem::path exe(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+#if (defined(__linux__) || defined(__ANDROID__))
+    return filesystem::canonical(
+            filesystem::path("/proc") / std::to_string(pid) / "exe", ec
+            );
+#elif defined(__sun)
+    return fileystem::canonical(
+            filesystem::path("/proc") / std::to_string(pid) / "path/a.out"
+            );
+#endif
+}
+
+#elif (defined(__FreeBSD__) || defined(__DragonFly__) || defined(__NetBSD__))
+
+filesystem::path exe(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+#if (defined(__FreeBSD__) || defined(__DragonFly__))
+    int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, pid};
+#elif defined(__NetBSD__)
+    int mib[4] = {CTL_KERN, KERN_PROC_ARGS, pid, KERN_PROC_PATHNAME};
+#endif
+    std::size_t len = 0;
+    if (sysctl(mib, 4, nullptr, &len, nullptr, 0) == 0) 
+    {
+        std::string strbuff;
+        strbuff.resize(len);
+        if (sysctl(mib, 4, &strbuff[0], &len, nullptr, 0) == 0)
+        {
+            strbuff.resize(len - 1);
+            return filesystem::canonical(strbuff, ec);
+        }
+    }
+
+    BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return "";
+}
+
+#elif defined(__OpenBSD__)
+
+filesystem::path exe(boost::process::v2::pid_type pid, boost::system::error_code & ec)
+{
+    BOOST_PROCESS_V2_ASSIGN_EC(ec, ENOTSUP, boost::system::system_category())
+    return "";
+}
+
+#else
+#error "Platform not supported"
+#endif
+
+filesystem::path exe(boost::process::v2::pid_type pid)
+{
+    boost::system::error_code ec;
+    auto res = exe(pid, ec);
+    if (ec)
+        detail::throw_error(ec, "exe");
+    return res;
+}
+
+
+} // namespace ext
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#endif // BOOST_PROCESS_V2_IMPL_EXE_IPP
+

include/boost/process/v2/impl/pid.ipp

@@ -1,4 +1,5 @@
 // Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
 //
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
@@ -6,14 +7,56 @@
 #define BOOST_PROCESS_V2_IMPL_PID_IPP
 
 #include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/last_error.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
 #include <boost/process/v2/pid.hpp>
 
 #if defined(BOOST_PROCESS_V2_WINDOWS)
 #include <windows.h>
+#include <tlhelp32.h>
 #else
 #include <unistd.h>
 #endif
 
+#if (defined(__APPLE__) && defined(__MACH__))
+#include <sys/proc_info.h>
+#include <libproc.h>
+#endif
+
+#if (defined(__linux__) || defined(__ANDROID__))
+#include <dirent.h>
+#endif
+
+#if defined(__FreeBSD__)
+#include <sys/types.h>
+#include <sys/user.h>
+#include <libutil.h>
+#include <cstdlib>
+#endif
+
+#if (defined(__DragonFly__) ||  defined(__OpenBSD__))
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <sys/user.h>
+#include <kvm.h>
+#endif
+
+#if defined(__NetBSD__)
+#include <sys/types.h>
+#include <kvm.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#endif
+
+#if defined(__sun)
+#include <sys/types.h>
+#include <kvm.h>
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/proc.h>
+#endif
+
 BOOST_PROCESS_V2_BEGIN_NAMESPACE
 
 #if defined(BOOST_PROCESS_V2_WINDOWS)
@@ -22,6 +65,700 @@ pid_type current_pid() {return ::GetCurrentProcessId();}
 pid_type current_pid() {return ::getpid();}
 #endif
 
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+
+std::vector<pid_type> all_pids(boost::system::error_code & ec)
+{
+    std::vector<pid_type> vec;
+    HANDLE hp = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
+    if (!hp)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return vec;
+    }
+    PROCESSENTRY32 pe;
+    pe.dwSize = sizeof(PROCESSENTRY32);
+    if (Process32First(hp, &pe)) 
+    {
+        do 
+        {
+            vec.push_back(pe.th32ProcessID);
+        } while (Process32Next(hp, &pe));
+    }
+    CloseHandle(hp);
+    return vec;
+}
+
+pid_type parent_pid(pid_type pid, boost::system::error_code & ec)
+{
+    pid_type ppid = static_cast<pid_type>(-1);
+    HANDLE hp = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
+    if (!hp)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return ppid;
+    }
+    PROCESSENTRY32 pe;
+    pe.dwSize = sizeof(PROCESSENTRY32);
+    if (Process32First(hp, &pe))
+    {
+        do
+        {
+            if (pe.th32ProcessID == pid)
+            {
+                ppid = pe.th32ParentProcessID;
+                break;
+            }
+        }
+        while (Process32Next(hp, &pe));
+    }
+    CloseHandle(hp);
+    return ppid;
+}
+
+std::vector<pid_type> child_pids(pid_type pid, boost::system::error_code & ec)
+{
+    std::vector<pid_type> vec;
+    HANDLE hp = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
+    if (!hp)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return vec;
+    }
+    PROCESSENTRY32 pe;
+    pe.dwSize = sizeof(PROCESSENTRY32);
+    if (Process32First(hp, &pe))
+    {
+        do
+        {
+            if (pe.th32ParentProcessID == pid)
+            {
+                vec.push_back(pe.th32ProcessID);
+            }
+        } 
+        while (Process32Next(hp, &pe));
+    }
+    CloseHandle(hp);
+    return vec;
+}
+
+#elif (defined(__APPLE__) && defined(__MACH__))
+
+std::vector<pid_type> all_pids(boost::system::error_code & ec)
+{
+    std::vector<pid_type> vec;
+    vec.reserve(proc_listpids(PROC_ALL_PIDS, 0, nullptr, 0));
+    if (proc_listpids(PROC_ALL_PIDS, 0, &vec[0], sizeof(pid_type) * vec.size()))
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+    auto itr = std::partition(vec.begin(), vec.end(), [](pid_type pt) {return pt != 0;});
+    vec.erase(itr, vec.end());
+    std::reverse(vec.begin(), vec.end());
+    return vec;
+}
+
+pid_type parent_pid(pid_type pid, boost::system::error_code & ec) 
+{
+    pid_type ppid = static_cast<pid_type>(-1);
+    proc_bsdinfo proc_info;
+    if (proc_pidinfo(pid, PROC_PIDTBSDINFO, 0, &proc_info, sizeof(proc_info)) <= 0)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return ppid;
+    }
+    else
+        ppid = proc_info.pbi_ppid;
+    return ppid;
+}
+
+std::vector<pid_type> child_pids(pid_type pid, boost::system::error_code & ec) 
+{
+    std::vector<pid_type> vec;
+    vec.reserve(proc_listpids(PROC_PPID_ONLY, (uint32_t)pid, nullptr, 0));
+    if (proc_listpids(PROC_PPID_ONLY, (uint32_t)pid, &vec[0], sizeof(pid_type) * vec.size()))
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return {};
+    }
+    auto itr = std::partition(vec.begin(), vec.end(), [](pid_type pt) {return pt != 0;});
+    vec.erase(itr, vec.end());
+    std::reverse(vec.begin(), vec.end());
+    return vec;
+}
+
+#elif (defined(__linux__) || defined(__ANDROID__))
+
+std::vector<pid_type> all_pids(boost::system::error_code & ec)
+{
+    std::vector<pid_type> vec;
+    DIR *proc = opendir("/proc");
+    if (!proc)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return vec;
+    } 
+    struct dirent *ent = nullptr;
+    while ((ent = readdir(proc))) 
+    {
+        if (!isdigit(*ent->d_name))
+            continue;
+        vec.push_back(atoi(ent->d_name));
+    }
+    closedir(proc);
+    return vec;
+}
+
+pid_type parent_pid(pid_type pid, boost::system::error_code & ec) 
+{
+    pid_type ppid = static_cast<pid_type>(-1);
+    char buffer[BUFSIZ];
+    sprintf(buffer, "/proc/%d/stat", pid);
+    FILE *stat = fopen(buffer, "r");
+    if (!stat)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return ppid;
+    } 
+    else
+    {
+        std::size_t size = fread(buffer, sizeof(char), sizeof(buffer), stat);
+        if (size > 0) 
+        {
+            char *token = nullptr;
+            if ((token = strtok(buffer, " "))) 
+            {
+                if ((token = strtok(nullptr, " "))) 
+                {
+                    if ((token = strtok(nullptr, " "))) 
+                    {
+                        if ((token = strtok(nullptr, " "))) 
+                        {
+                            ppid = (pid_type)strtoul(token, nullptr, 10);
+                        }
+                    }
+                }
+            }
+            if (!token)
+            {
+                fclose(stat);
+                BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+                return ppid;
+            }
+        }
+        fclose(stat);
+    }
+    return ppid;
+}
+
+std::vector<pid_type> child_pids(pid_type pid, boost::system::error_code & ec) 
+{
+    std::vector<pid_type> vec;
+    std::vector<pid_type> pids = all_pids(ec);
+    if (!pids.empty()) 
+        vec.reserve(pids.size());
+    for (std::size_t i = 0; i < pids.size(); i++)
+    {
+        pid_type ppid = parent_pid(pids[i], ec);
+        if (ppid != -1 && ppid == pid)
+        {
+            vec.push_back(pids[i]);
+        }
+    }
+    return vec;
+}
+
+#elif defined(__FreeBSD__)
+
+std::vector<pid_type> all_pids(boost::system::error_code & ec)
+{
+    std::vector<pid_type> vec;
+    int cntp = 0;
+    kinfo_proc *proc_info = kinfo_getallproc(&cntp);
+    if (proc_info) 
+    {
+        vec.reserve(cntp);
+        for (int i = 0; i < cntp; i++)
+            vec.push_back(proc_info[i].ki_pid);
+        free(proc_info);
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return vec;
+}
+
+pid_type parent_pid(pid_type pid, boost::system::error_code & ec)
+{
+    pid_type ppid = static_cast<pid_type>(-1);
+    kinfo_proc *proc_info = kinfo_getproc(pid);
+    if (proc_info)
+    {
+        ppid = proc_info->ki_ppid;
+        free(proc_info);
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return ppid;
+}
+
+std::vector<pid_type> child_pids(pid_type pid, boost::system::error_code & ec) 
+{
+    std::vector<pid_type> vec;
+    int cntp = 0; 
+    kinfo_proc *proc_info = kinfo_getallproc(&cntp);
+    if (proc_info)
+    {
+        vec.reserve(cntp);
+        for (int i = 0; i < cntp; i++)
+        {
+            if (proc_info[i].ki_ppid == pid)
+            {
+                vec.push_back(proc_info[i].ki_pid);
+            }
+        }
+        free(proc_info);
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return vec;
+}
+
+#elif defined(__DragonFly__)
+
+std::vector<pid_type> all_pids(boost::system::error_code & ec)
+{
+    std::vector<pid_type> vec;
+    int cntp = 0;
+    kinfo_proc *proc_info = nullptr;
+    const char *nlistf, *memf;
+    nlistf = memf = "/dev/null";
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nlistf, memf, nullptr, O_RDONLY, nullptr)};
+    if (!kd) 
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return vec;
+    }
+    if ((proc_info = kvm_getprocs(kd.get(), KERN_PROC_ALL, 0, &cntp))) 
+    {
+        vec.reserve(cntp);
+        for (int i = 0; i < cntp; i++) 
+            if (proc_info[i].kp_pid >= 0) 
+                vec.push_back(proc_info[i].kp_pid);
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return vec;
+}
+
+pid_type parent_pid(pid_type pid, boost::system::error_code & ec)
+{
+    pid_type ppid = static_cast<pid_type>(-1);
+    int cntp = 0;
+    kinfo_proc *proc_info = nullptr;
+    const char *nlistf, *memf;
+    nlistf = memf = "/dev/null";
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nlistf, memf, nullptr, O_RDONLY, nullptr)}; 
+    if (!kd) 
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return ppid;
+    }
+    if ((proc_info = kvm_getprocs(kd.get(), KERN_PROC_PID, pid, &cntp)))
+    {
+        if (proc_info->kp_ppid >= 0)
+        {
+            ppid = proc_info->kp_ppid;
+        }
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return ppid;
+}
+
+std::vector<pid_type> child_pids(pid_type pid, boost::system::error_code & ec) 
+{
+    std::vector<pid_type> vec;
+    int cntp = 0;
+    kinfo_proc *proc_info = nullptr;
+    const char *nlistf, *memf;
+    nlistf = memf = "/dev/null";
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nlistf, memf, nullptr, O_RDONLY, nullptr)};
+    if (!kd) 
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return vec;
+    }
+    if ((proc_info = kvm_getprocs(kd.get(), KERN_PROC_ALL, 0, &cntp)))
+    {
+        vec.reserve(cntp);
+        for (int i = 0; i < cntp; i++)
+        {
+            if (proc_info[i].kp_pid >= 0 && proc_info[i].kp_ppid >= 0 && proc_info[i].kp_ppid == pid)
+            {
+                vec.push_back(proc_info[i].kp_pid);
+            }
+        }
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return vec;
+}
+
+#elif defined(__NetBSD__)
+
+std::vector<pid_type> all_pids(boost::system::error_code & ec)
+{
+    std::vector<pid_type> vec;
+    int cntp = 0;
+    kinfo_proc2  *proc_info = nullptr;
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nullptr, nullptr, nullptr, KVM_NO_FILES, nullptr)};
+    if (!kd)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return vec;
+    } 
+    if ((proc_info = kvm_getproc2(kd.get(), KERN_PROC_ALL, 0, sizeof(struct kinfo_proc2), &cntp)))
+    {
+        vec.reserve(cntp);
+        for (int i = cntp - 1; i >= 0; i--) 
+        {
+            vec.push_back(proc_info[i].p_pid);
+        }
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return vec;
+}
+
+pid_type parent_pid(pid_type pid, boost::system::error_code & ec) 
+{
+    pid_type ppid = static_cast<pid_type>(-1);
+    int cntp = 0;
+    kinfo_proc2 *proc_info = nullptr;
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nullptr, nullptr, nullptr, KVM_NO_FILES, nullptr)};
+    if (!kd) 
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return ppid;
+    }
+    if ((proc_info = kvm_getproc2(kd.get(), KERN_PROC_PID, pid, sizeof(struct kinfo_proc2), &cntp)))
+    {
+        ppid = proc_info->p_ppid;
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return ppid;
+}
+
+std::vector<pid_type> child_pids(pid_type pid, boost::system::error_code & ec) 
+{
+    std::vector<pid_type> vec;
+    int cntp = 0;
+    kinfo_proc2 *proc_info = nullptr;
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nullptr, nullptr, nullptr, KVM_NO_FILES, nullptr)};
+    if (!kd) 
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return vec;
+    }
+    if ((proc_info = kvm_getproc2(kd.get(), KERN_PROC_ALL, 0, sizeof(struct kinfo_proc2), &cntp)))
+    {
+        vec.reserve(cntp);
+        for (int i = cntp - 1; i >= 0; i--)
+        {
+            if (proc_info[i].p_ppid == pid)
+            {
+                vec.push_back(proc_info[i].p_pid);
+            }
+        }
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return vec;
+}
+
+#elif defined(__OpenBSD__)
+
+std::vector<pid_type> all_pids(boost::system::error_code & ec)
+{
+    std::vector<pid_type> vec;
+    int cntp = 0;
+    kinfo_proc *proc_info = nullptr;
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nullptr, nullptr, nullptr, KVM_NO_FILES, nullptr)};
+    if (!kd)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return vec;
+    } 
+    if ((proc_info = kvm_getprocs(kd.get(), KERN_PROC_ALL, 0, sizeof(struct kinfo_proc), &cntp)))
+    {
+        vec.reserve(cntp);
+        for (int i = cntp - 1; i >= 0; i--)
+        {
+            if (proc_info[i].kp_pid >= 0) 
+            {
+                vec.push_back(proc_info[i].kp_pid);
+            }
+        }
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return vec;
+}
+
+pid_type parent_pid(pid_type pid, boost::system::error_code & ec) 
+{
+    pid_type ppid = static_cast<pid_type>(-1);
+    int cntp = 0;
+    kinfo_proc *proc_info = nullptr;
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nullptr, nullptr, nullptr, KVM_NO_FILES, nullptr)};
+    if (!kd)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return ppid;
+    }
+    if ((proc_info = kvm_getprocs(kd.get(), KERN_PROC_PID, pid, sizeof(struct kinfo_proc), &cntp)))
+    {
+        ppid = proc_info->p_ppid;
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return ppid;
+}
+
+std::vector<pid_type> child_pids(pid_type pid, boost::system::error_code & ec) 
+{
+    std::vector<pid_type> vec;
+    int cntp = 0;
+    kinfo_proc *proc_info = nullptr;
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_openfiles(nullptr, nullptr, nullptr, KVM_NO_FILES, nullptr)}; 
+    if (!kd) 
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return vec;
+    }
+    if ((proc_info = kvm_getprocs(kd.get(), KERN_PROC_ALL, 0, sizeof(struct kinfo_proc), &cntp)))
+    {
+        vec.reserve(cntp);
+        for (int i = cntp - 1; i >= 0; i--)
+        {
+            if (proc_info[i].p_ppid == pid)
+            {
+                vec.push_back(proc_info[i].p_pid);
+            }
+        }
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return vec;
+}
+
+
+#elif defined(__sun)
+
+std::vector<pid_type> all_pids(boost::system::error_code & ec)
+{
+    std::vector<pid_type> vec;
+    struct pid cur_pid;
+    proc *proc_info = nullptr;
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_open(nullptr, nullptr, nullptr, O_RDONLY, nullptr)};
+    if (!kd)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return vec;
+    } 
+    while ((proc_info = kvm_nextproc(kd)))
+    {
+        if (kvm_kread(kd, (std::uintptr_t)proc_info->p_pidp, &cur_pid, sizeof(cur_pid)) != -1)
+        {
+            vec.insert(vec.begin(), cur_pid.pid_id);
+        }
+        else
+        {
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+            break;
+        }
+    }
+    return vec;
+}
+
+pid_type parent_pid(pid_type pid, boost::system::error_code & ec) 
+{
+    pid_type ppid = static_cast<pid_type>(-1);
+    proc *proc_info = nullptr;
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_open(nullptr, nullptr, nullptr, O_RDONLY, nullptr)};
+    if (!kd)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return ppid;
+    }
+    if ((proc_info = kvm_getproc(kd, pid)))
+    {
+        ppid = proc_info->p_ppid;
+    }
+    else
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+    return ppid;
+}
+
+std::vector<pid_type> child_pids(pid_type pid, boost::system::error_code & ec)
+{
+    std::vector<pid_type> vec;
+    struct pid cur_pid;
+    proc *proc_info = nullptr;
+    struct closer
+    {
+        void operator()(kvm_t * kd)
+        {
+            kvm_close(kd);
+        }
+    };
+
+    std::unique_ptr<kvm_t, closer> kd{kvm_open(nullptr, nullptr, nullptr, O_RDONLY, nullptr);
+    if (!kd)
+    {
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+        return vec;
+    }
+    while ((proc_info = kvm_nextproc(kd)))
+    {
+        if (proc_info->p_ppid == pid)
+        {
+            if (kvm_kread(kd, (std::uintptr_t)proc_info->p_pidp, &cur_pid, sizeof(cur_pid)) != -1)
+            {
+                vec.insert(vec.begin(), cur_pid.pid_id);
+            }
+            else
+            {
+                BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
+                break;
+            }
+        }
+    }
+    return vec;
+}
+
+#else
+#error "Platform not supported"
+#endif
+
+std::vector<pid_type> all_pids()
+{
+    boost::system::error_code ec;
+    auto res = all_pids(ec);
+    if (ec)
+        detail::throw_error(ec, "all_pids");
+    return res;
+}
+
+pid_type parent_pid(pid_type pid)
+{
+    boost::system::error_code ec;
+    auto res = parent_pid(pid, ec);
+    if (ec)
+        detail::throw_error(ec, "parent_pid");
+    return res;
+}
+
+std::vector<pid_type> child_pids(pid_type pid)
+{
+    boost::system::error_code ec;
+    auto res = child_pids(pid, ec);
+    if (ec)
+        detail::throw_error(ec, "child_pids");
+    return res;
+}
+
 BOOST_PROCESS_V2_END_NAMESPACE
 
-#endif //BOOST_PROCESS_V2_IMPL_PID_IPP
+#endif // BOOST_PROCESS_V2_IMPL_PID_IPP
+

include/boost/process/v2/impl/shell.ipp

@@ -0,0 +1,137 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_PROCESS_V2_IMPL_SHELL_IPP
+#define BOOST_PROCESS_V2_IMPL_SHELL_IPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/last_error.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/error.hpp>
+#include <boost/process/v2/shell.hpp>
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+#include <shellapi.h>
+#else
+#include <wordexp.h>
+#endif
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+BOOST_PROCESS_V2_DECL const error_category& get_shell_category()
+{
+    return system_category();
+}
+#else
+
+struct shell_category_t final : public error_category
+{
+    shell_category_t() : error_category(0xDAF1u) {}
+
+    const char* name() const noexcept
+    {
+        return "process.v2.utf8";
+    }
+    std::string message(int value) const
+    {
+        switch (value)
+        {
+        case WRDE_BADCHAR:
+            return "Illegal occurrence of newline or one of |, &, ;, <, >, (, ), {, }.";
+        case WRDE_BADVAL:
+            return "An undefined shell variable was referenced, and the WRDE_UNDEF flag told us to consider this an error.";
+        case WRDE_CMDSUB:
+            return "Command substitution occurred, and the WRDE_NOCMD flag told us to consider this an error.";
+        case WRDE_NOSPACE:
+            return "Out of memory.";
+        case WRDE_SYNTAX:
+            return "Shell syntax error, such as unbalanced parentheses or unmatched quotes.";
+        default:
+            return "process.v2.wordexp error";
+        }
+    }
+};
+
+BOOST_PROCESS_V2_DECL const error_category& get_shell_category()
+{
+    static shell_category_t instance;
+    return instance;
+}
+
+#endif
+
+#if defined (BOOST_PROCESS_V2_WINDOWS)
+
+void shell::parse_()
+{
+    argv_ = ::CommandLineToArgvW(input_.c_str(), &argc_);
+    if (argv_ == nullptr)
+    {
+        error_code ec;
+        BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec);
+        throw system_error(ec, "shell::parse");
+    }
+}
+
+shell::~shell()
+{
+    if (argv_ != nullptr)
+        LocalFree(argv_);
+}
+
+auto shell::args() const-> args_type
+{
+    return input_.c_str();
+}
+
+#else
+
+void shell::parse_()
+{
+    wordexp_t we{};
+    auto cd = wordexp(input_.c_str(), &we, WRDE_NOCMD);
+
+    if (cd != 0)
+        detail::throw_error(error_code(cd, get_shell_category()), "shell::parse");
+    else
+    {
+        argc_ = static_cast<int>(we.we_wordc);
+        argv_ = we.we_wordv;
+    }
+
+    free_argv_ = +[](int argc, char ** argv)
+    {
+        wordexp_t we{
+                .we_wordc = static_cast<std::size_t>(argc),
+                .we_wordv = argv,
+                .we_offs = 0
+        };
+        wordfree(&we);
+    };
+}
+
+shell::~shell()
+{
+    if (argv_ != nullptr && free_argv_ != nullptr)
+        free_argv_(argc_, argv_);
+}
+
+auto shell::args() const -> args_type
+{
+    if (argc() == 0)
+    {
+        static const char * helper = nullptr;
+        return &helper;
+    }
+    else
+        return const_cast<const char**>(argv());
+}
+
+#endif
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#endif //BOOST_PROCESS_V2_IMPL_SHELL_IPP

include/boost/process/v2/pid.hpp

@@ -1,4 +1,5 @@
 // Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
 //
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
@@ -6,6 +7,7 @@
 #define BOOST_PROCESS_V2_PID_HPP
 
 #include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
 
 BOOST_PROCESS_V2_BEGIN_NAMESPACE
 
@@ -14,7 +16,6 @@ BOOST_PROCESS_V2_BEGIN_NAMESPACE
 //An integral type representing a process id.
 typedef implementation_defined pid_type;
 
-
 #else
 
 #if defined(BOOST_PROCESS_V2_WINDOWS)
@@ -28,14 +29,38 @@ typedef int pid_type;
 #endif
 #endif
 
+#if (defined(BOOST_PROCESS_V2_WINDOWS) || defined(__FreeBSD__) || defined(__DragonFly__) || defined(__NetBSD__) || defined(__sun))
+constexpr static pid_type root_pid = 0;
+#elif (defined(__APPLE__) && defined(__MACH__) || defined(__linux__) || defined(__ANDROID__) || defined(__OpenBSD__))
+constexpr static pid_type root_pid = 1;
+#endif
+
 /// Get the process id of the current process.
 BOOST_PROCESS_V2_DECL pid_type current_pid();
 
+/// List all available pids.
+BOOST_PROCESS_V2_DECL std::vector<pid_type> all_pids(boost::system::error_code & ec);
+
+/// List all available pids.
+BOOST_PROCESS_V2_DECL std::vector<pid_type> all_pids();
+
+// return parent pid of pid.
+BOOST_PROCESS_V2_DECL pid_type parent_pid(pid_type pid, boost::system::error_code & ec);
+
+// return parent pid of pid.
+BOOST_PROCESS_V2_DECL pid_type parent_pid(pid_type pid);
+
+// return child pids of pid.
+BOOST_PROCESS_V2_DECL std::vector<pid_type> child_pids(pid_type pid, boost::system::error_code & ec);
+
+// return child pids of pid.
+BOOST_PROCESS_V2_DECL std::vector<pid_type> child_pids(pid_type pid);
+
 BOOST_PROCESS_V2_END_NAMESPACE
 
 #if defined(BOOST_PROCESS_V2_HEADER_ONLY)
 #include <boost/process/v2/impl/pid.ipp>
 #endif
 
+#endif // BOOST_PROCESS_V2_PID_HPP
 
-#endif //BOOST_PROCESS_V2_PID_HPP

include/boost/process/v2/popen.hpp

@@ -74,8 +74,6 @@ struct basic_popen : basic_process<Executor>
     {
     }
 
-
-
     /// Construct a child from a property list and launch it using the default process launcher.
     template<typename ... Inits>
     explicit basic_popen(
@@ -85,30 +83,66 @@ struct basic_popen : basic_process<Executor>
             Inits&&... inits)
             : basic_process<Executor>(executor)
     {
-        *static_cast<basic_process<Executor>*>(this) =
+        this->basic_process<Executor>::operator=(
             default_process_launcher()(
                     this->get_executor(), exe, args,
                     std::forward<Inits>(inits)...,
                     process_stdio{stdin_, stdout_}
-                    );
+                    ));
+    }
 
+    /// Construct a child from a property list and launch it using the default process launcher.
+    template<typename Launcher, typename ... Inits>
+    explicit basic_popen(
+            Launcher && launcher,
+            executor_type executor,
+            const filesystem::path& exe,
+            std::initializer_list<string_view> args,
+            Inits&&... inits)
+            : basic_process<Executor>(executor)
+    {
+        this->basic_process<Executor>::operator=(
+            std::forward<Launcher>(launcher)(
+                    this->get_executor(), exe, args,
+                    std::forward<Inits>(inits)...,
+                    process_stdio{stdin_, stdout_}
+                    ));
     }
 
     /// Construct a child from a property list and launch it using the default process launcher.
     template<typename ... Inits>
     explicit basic_popen(
             executor_type executor,
-    const filesystem::path& exe,
+            const filesystem::path& exe,
             std::initializer_list<wstring_view> args,
             Inits&&... inits)
             : basic_process<Executor>(executor)
     {
-        *static_cast<basic_process<Executor>*>(this) =
+        this->basic_process<Executor>::operator=(
                 default_process_launcher()(
                         this->get_executor(), exe, args,
                         std::forward<Inits>(inits)...,
                         process_stdio{stdin_, stdout_}
-                );
+                ));
+    }
+
+
+    /// Construct a child from a property list and launch it using the default process launcher.
+    template<typename Launcher, typename ... Inits>
+    explicit basic_popen(
+            Launcher && launcher, 
+            executor_type executor,
+            const filesystem::path& exe,
+            std::initializer_list<wstring_view> args,
+            Inits&&... inits)
+            : basic_process<Executor>(executor)
+    {
+        this->basic_process<Executor>::operator=(
+                std::forward<Launcher>(launcher)(
+                        this->get_executor(), exe, args,
+                        std::forward<Inits>(inits)...,
+                        process_stdio{stdin_, stdout_}
+                ));
     }
 
     /// Construct a child from a property list and launch it using the default process launcher.
@@ -119,53 +153,112 @@ struct basic_popen : basic_process<Executor>
             Args&& args, Inits&&... inits)
             : basic_process<Executor>(executor)
     {
-        *static_cast<basic_process<Executor>*>(this) =
+        this->basic_process<Executor>::operator=(
                 default_process_launcher()(
                         std::move(executor), exe, args,
                         std::forward<Inits>(inits)...,
                         process_stdio{stdin_, stdout_}
-                );
+                ));
+    }
+
+    /// Construct a child from a property list and launch it using the default process launcher.
+    template<typename Launcher, typename Args, typename ... Inits>
+    explicit basic_popen(
+            Launcher && launcher, 
+            executor_type executor,
+            const filesystem::path& exe,
+            Args&& args, Inits&&... inits)
+            : basic_process<Executor>(executor)
+    {
+        this->basic_process<Executor>::operator=(
+                std::forward<Launcher>(launcher)(
+                        std::move(executor), exe, args,
+                        std::forward<Inits>(inits)...,
+                        process_stdio{stdin_, stdout_}
+                ));
     }
 
     /// Construct a child from a property list and launch it using the default process launcher.
     template<typename ExecutionContext, typename ... Inits>
     explicit basic_popen(
             ExecutionContext & context,
-    typename std::enable_if<
-            std::is_convertible<ExecutionContext&,
+            typename std::enable_if<
+                std::is_convertible<ExecutionContext&,
                     BOOST_PROCESS_V2_ASIO_NAMESPACE::execution_context&>::value,
             const filesystem::path&>::type exe,
             std::initializer_list<string_view> args,
-    Inits&&... inits)
+            Inits&&... inits)
             : basic_process<Executor>(context)
     {
-        *static_cast<basic_process<Executor>*>(this) =
+        this->basic_process<Executor>::operator=(
                 default_process_launcher()(
                         this->get_executor(), exe, args,
                         std::forward<Inits>(inits)...,
                         process_stdio{stdin_, stdout_}
-                );
+                ));
+    }
+
+        /// Construct a child from a property list and launch it using the default process launcher.
+    template<typename Launcher, typename ExecutionContext, typename ... Inits>
+    explicit basic_popen(
+            Launcher && launcher, 
+            ExecutionContext & context,
+            typename std::enable_if<
+                std::is_convertible<ExecutionContext&,
+                    BOOST_PROCESS_V2_ASIO_NAMESPACE::execution_context&>::value,
+            const filesystem::path&>::type exe,
+            std::initializer_list<string_view> args,
+            Inits&&... inits)
+            : basic_process<Executor>(context)
+    {
+        this->basic_process<Executor>::operator=(
+                std::forward<Launcher>(launcher)(
+                        this->get_executor(), exe, args,
+                        std::forward<Inits>(inits)...,
+                        process_stdio{stdin_, stdout_}
+                ));
     }
 
     /// Construct a child from a property list and launch it using the default process launcher.
     template<typename ExecutionContext, typename Args, typename ... Inits>
     explicit basic_popen(
             ExecutionContext & context,
-    typename std::enable_if<
-            std::is_convertible<ExecutionContext&,
+            typename std::enable_if<
+                std::is_convertible<ExecutionContext&,
                     BOOST_PROCESS_V2_ASIO_NAMESPACE::execution_context&>::value,
             const filesystem::path&>::type exe,
             Args&& args, Inits&&... inits)
             : basic_process<Executor>(context)
     {
-        *static_cast<basic_process<Executor>*>(this) =
+        this->basic_process<Executor>::operator=(
                 default_process_launcher()(
                         this->get_executor(), exe, args,
                         std::forward<Inits>(inits)...,
                         process_stdio{stdin_, stdout_}
-                );
+                ));
     }
 
+        /// Construct a child from a property list and launch it using the default process launcher.
+    template<typename Launcher, typename ExecutionContext, typename Args, typename ... Inits>
+    explicit basic_popen(
+            Launcher && launcher, 
+            ExecutionContext & context,
+            typename std::enable_if<
+                std::is_convertible<ExecutionContext&,
+                    BOOST_PROCESS_V2_ASIO_NAMESPACE::execution_context&>::value,
+            const filesystem::path&>::type exe,
+            Args&& args, Inits&&... inits)
+            : basic_process<Executor>(context)
+    {
+        this->basic_process<Executor>::operator=(
+                std::forward<Launcher>(launcher)(
+                        this->get_executor(), exe, args,
+                        std::forward<Inits>(inits)...,
+                        process_stdio{stdin_, stdout_}
+                ));
+    }
+
+
     /// The type used for stdin on the parent process side.
     using stdin_type = BOOST_PROCESS_V2_ASIO_NAMESPACE::basic_writable_pipe<Executor>;
     /// The type used for stdout on the parent process side.

include/boost/process/v2/posix/bind_fd.hpp

@@ -91,13 +91,17 @@ struct bind_fd
     {
     }
 
+    error_code on_setup(posix::default_launcher & launcher, const filesystem::path &, const char * const *)
+    {
+        launcher.fd_whitelist.push_back(target);
+        return {};
+    }
+
     /// Implementation of the initialization function.
     error_code on_exec_setup(posix::default_launcher & launcher, const filesystem::path &, const char * const *)
     {
         if (::dup2(fd, target) == -1)
             return error_code(errno, system_category());
-        
-        launcher.fd_whitelist.push_back(target);
         return error_code ();
     }
 };

include/boost/process/v2/posix/default_launcher.hpp

@@ -364,12 +364,12 @@ struct default_launcher
             pipe_guard pg;
             if (::pipe(pg.p))
             {
-                ec.assign(errno, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
                 return basic_process<Executor>{exec};
             }
             if (::fcntl(pg.p[1], F_SETFD, FD_CLOEXEC))
             {
-                ec.assign(errno, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
                 return basic_process<Executor>{exec};
             }
             ec = detail::on_setup(*this, executable, argv, inits ...);
@@ -378,6 +378,7 @@ struct default_launcher
                 detail::on_error(*this, executable, argv, ec, inits...);
                 return basic_process<Executor>(exec);
             }
+            fd_whitelist.push_back(pg.p[1]);
 
             auto & ctx = BOOST_PROCESS_V2_ASIO_NAMESPACE::query(
                     exec, BOOST_PROCESS_V2_ASIO_NAMESPACE::execution::context);
@@ -389,7 +390,7 @@ struct default_launcher
                 detail::on_fork_error(*this, executable, argv, ec, inits...);
                 detail::on_error(*this, executable, argv, ec, inits...);
 
-                ec.assign(errno, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
                 return basic_process<Executor>{exec};
             }
             else if (pid == 0)
@@ -399,14 +400,13 @@ struct default_launcher
                 ec = detail::on_exec_setup(*this, executable, argv, inits...);
                 if (!ec)
                 {
-                    fd_whitelist.push_back(pg.p[1]);
                     close_all_fds(ec);
                 }                
                 if (!ec)
                     ::execve(executable.c_str(), const_cast<char * const *>(argv), const_cast<char * const *>(env));
 
                 ignore_unused(::write(pg.p[1], &errno, sizeof(int)));
-                ec.assign(errno, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
                 detail::on_exec_error(*this, executable, argv, ec, inits...);
                 ::exit(EXIT_FAILURE);
                 return basic_process<Executor>{exec};
@@ -422,12 +422,12 @@ struct default_launcher
                 int err = errno;
                 if ((err != EAGAIN) && (err != EINTR))
                 {
-                    ec.assign(err, system_category());
+                    BOOST_PROCESS_V2_ASSIGN_EC(ec, err, system_category())
                     break;
                 }
             }
             if (count != 0)
-                ec.assign(child_error, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, child_error, system_category())
 
             if (ec)
             {
@@ -485,6 +485,11 @@ struct default_launcher
         return argv_.data();
     }
 
+    const char * const * build_argv_(const filesystem::path &, const char ** argv)
+    {
+        return argv;
+    }
+
     template<typename Args>
     const char * const *  build_argv_(const filesystem::path & pt, const Args & args,
                                       typename std::enable_if<

include/boost/process/v2/posix/fork_and_forget_launcher.hpp

@@ -94,7 +94,7 @@ struct fork_and_forget_launcher : default_launcher
                 detail::on_fork_error(*this, executable, argv, ec, inits...);
                 detail::on_error(*this, executable, argv, ec, inits...);
 
-                ec.assign(errno, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
                 return basic_process<Executor>{exec};
             }
             else if (pid == 0)
@@ -107,7 +107,7 @@ struct fork_and_forget_launcher : default_launcher
                 if (!ec)
                     ::execve(executable.c_str(), const_cast<char * const *>(argv), const_cast<char * const *>(env));
 
-                ec.assign(errno, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
                 detail::on_exec_error(*this, executable, argv, ec, inits...);
                 ::exit(EXIT_FAILURE);
                 return basic_process<Executor>{exec};

include/boost/process/v2/posix/pdfork_launcher.hpp

@@ -85,12 +85,12 @@ struct pdfork_launcher : default_launcher
             pipe_guard pg;
             if (::pipe(pg.p))
             {
-                ec.assign(errno, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
                 return basic_process<Executor>{exec};
             }
             if (::fcntl(pg.p[1], F_SETFD, FD_CLOEXEC))
             {
-                ec.assign(errno, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
                 return basic_process<Executor>{exec};
             }
             ec = detail::on_setup(*this, executable, argv, inits ...);
@@ -99,6 +99,7 @@ struct pdfork_launcher : default_launcher
                 detail::on_error(*this, executable, argv, ec, inits...);
                 return basic_process<Executor>(exec);
             }
+            fd_whitelist.push_back(pg.p[1]);
 
             auto & ctx = BOOST_PROCESS_V2_ASIO_NAMESPACE::query(
                     exec, BOOST_PROCESS_V2_ASIO_NAMESPACE::execution::context);
@@ -110,7 +111,7 @@ struct pdfork_launcher : default_launcher
                 detail::on_fork_error(*this, executable, argv, ec, inits...);
                 detail::on_error(*this, executable, argv, ec, inits...);
 
-                ec.assign(errno, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
                 return basic_process<Executor>{exec};
             }
             else if (pid == 0)
@@ -121,14 +122,13 @@ struct pdfork_launcher : default_launcher
                 ec = detail::on_exec_setup(*this, executable, argv, inits...);
                 if (!ec)
                 {
-                    fd_whitelist.push_back(pg.p[1]);
                     close_all_fds(ec);
                 }                
                 if (!ec)
                     ::execve(executable.c_str(), const_cast<char * const *>(argv), const_cast<char * const *>(env));
 
                 default_launcher::ignore_unused(::write(pg.p[1], &errno, sizeof(int)));
-                ec.assign(errno, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
                 detail::on_exec_error(*this, executable, argv, ec, inits...);
                 ::exit(EXIT_FAILURE);
                 return basic_process<Executor>{exec};
@@ -143,12 +143,12 @@ struct pdfork_launcher : default_launcher
                 int err = errno;
                 if ((err != EAGAIN) && (err != EINTR))
                 {
-                    ec.assign(err, system_category());
+                    BOOST_PROCESS_V2_ASSIGN_EC(ec, err, system_category())
                     break;
                 }
             }
             if (count != 0)
-                ec.assign(child_error, system_category());
+                BOOST_PROCESS_V2_ASSIGN_EC(ec, child_error, system_category())
 
             if (ec)
             {

include/boost/process/v2/posix/vfork_launcher.hpp

@@ -96,7 +96,7 @@ struct vfork_launcher :  default_launcher
             detail::on_fork_error(*this, executable, argv, ec, inits...);
             detail::on_error(*this, executable, argv, ec, inits...);
 
-            ec.assign(errno, system_category());
+            BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
             return basic_process<Executor>{exec};
         }
         else if (pid == 0)
@@ -108,7 +108,7 @@ struct vfork_launcher :  default_launcher
             if (!ec)
                 ::execve(executable.c_str(), const_cast<char * const *>(argv), const_cast<char * const *>(env));
 
-            ec.assign(errno, system_category());
+            BOOST_PROCESS_V2_ASSIGN_EC(ec, errno, system_category())
             detail::on_exec_error(*this, executable, argv, ec, inits...);
             ::exit(EXIT_FAILURE);
             return basic_process<Executor>{exec};

include/boost/process/v2/process.hpp

@@ -15,13 +15,16 @@
 #include <boost/process/v2/default_launcher.hpp>
 #include <boost/process/v2/exit_code.hpp>
 #include <boost/process/v2/pid.hpp>
+#include <boost/process/v2/ext/exe.hpp>
 #include <boost/process/v2/process_handle.hpp>
 
 #if defined(BOOST_PROCESS_V2_STANDALONE)
 #include <asio/any_io_executor.hpp>
+#include <asio/post.hpp>
 #include <utility>
 #else
 #include <boost/asio/any_io_executor.hpp>
+#include <boost/asio/post.hpp>
 #include <boost/core/exchange.hpp>
 #endif
 
@@ -164,7 +167,7 @@ struct basic_process
                          typename std::enable_if<
                             std::is_convertible<ExecutionContext&, 
                                 BOOST_PROCESS_V2_ASIO_NAMESPACE::execution_context&>::value, void *>::type = nullptr)
-      : process_handle_(context, pid, native_handle) {}
+      : process_handle_(context.get_executor(), pid, native_handle) {}
 
   /// Create an invalid handle
   template <typename ExecutionContext>
@@ -172,7 +175,7 @@ struct basic_process
                          typename std::enable_if<
                              is_convertible<ExecutionContext&, 
                                 BOOST_PROCESS_V2_ASIO_NAMESPACE::execution_context&>::value, void *>::type = nullptr)
-     : process_handle_(context) {}
+     : process_handle_(context.get_executor()) {}
 
 
 
@@ -212,6 +215,37 @@ struct basic_process
     process_handle_.request_exit(ec);
   }
 
+  /// Send the process a signal requesting it to stop. This may rely on undocumented functions.
+  void suspend(error_code &ec)
+  {
+    process_handle_.suspend(ec);
+  }
+
+  /// Send the process a signal requesting it to stop. This may rely on undocumented functions.
+  void suspend()
+  {
+    error_code ec;
+    suspend(ec);
+    if (ec)
+        detail::throw_error(ec, "suspend");
+  }
+
+
+  /// Send the process a signal requesting it to resume. This may rely on undocumented functions.
+  void resume(error_code &ec)
+  {
+    process_handle_.resume(ec);  
+  }
+
+  /// Send the process a signal requesting it to resume. This may rely on undocumented functions.
+  void resume()
+  {
+      error_code ec;
+      suspend(ec);
+      if (ec)
+          detail::throw_error(ec, "resume");
+  }
+
   /// Throwing @overload void terminate(native_exit_code_type &exit_code, error_code & ec)
   void terminate()
   {
@@ -339,7 +373,7 @@ private:
         };
 
         BOOST_PROCESS_V2_ASIO_NAMESPACE::post(handle.get_executor(),
-                                              completer{res, std::move(self)});
+                                              completer{static_cast<int>(res), std::move(self)});
       }
       else
         handle.async_wait(std::move(self));
@@ -366,4 +400,4 @@ typedef basic_process<> process;
 BOOST_PROCESS_V2_END_NAMESPACE
 
 
-#endif //BOOST_PROCESS_V2_PROCESS_HPP
+#endif //BOOST_PROCESS_V2_PROCESS_HPP

include/boost/process/v2/shell.hpp

@@ -0,0 +1,149 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+#ifndef BOOST_PROCESS_V2_SHELL_HPP
+#define BOOST_PROCESS_V2_SHELL_HPP
+
+#include <boost/core/exchange.hpp>
+#include <boost/process/v2/cstring_ref.hpp>
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/utf8.hpp>
+#include <boost/process/v2/detail/throw_error.hpp>
+#include <boost/process/v2/environment.hpp>
+#include <memory>
+#include <string>
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+/// Error category used by the shell parser.
+extern BOOST_PROCESS_V2_DECL const error_category& get_shell_category();
+static const error_category& shell_category = get_shell_category();
+
+/// Utility to parse commands 
+/** This utility class parses command lines into tokens
+ * and allows users to executed based on textual inputs.
+ * 
+ * In v1, this was possible directly when starting a process,
+ * but has been removed based on the security risks associated with this.
+ * 
+ * By making the shell parsing explicity, it is encouraged
+ * that a user runs a sanity check on the executable before launching it.
+ * 
+ * @par Example
+ * @code {.cpp}
+ * asio::io_context ctx;
+ * 
+ * auto cmd = shell("my-app --help");
+ * auto exe = cmd.exe();
+ * check_if_malicious(exe);
+ * 
+ * process proc{ctx, exe, cmd.args()};
+ * 
+ * @endcode
+ * 
+ * 
+ */
+struct shell
+{    
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+    using char_type = wchar_t; 
+    using args_type = const wchar_t *;
+#else
+    using char_type = char;
+    using args_type = const char **;
+#endif
+
+    shell() = default;
+
+    template<typename Char, typename Traits>
+    shell(basic_string_view<Char, Traits> input) 
+        : buffer_(detail::conv_string<char_type>(input.data(), input.size())) 
+    {
+        parse_();
+    }
+
+    shell(basic_cstring_ref<char_type> input) : input_(input) {parse_();}
+    shell(basic_string_view<
+                    typename std::conditional<
+                        std::is_same<char_type, char>::value,
+                        wchar_t, char>::type> input) : buffer_(detail::conv_string<char_type>(input.data(), input.size())) 
+    {
+        parse_();
+    }
+
+    shell(const shell &) = delete;
+    shell& operator=(const shell &) = delete;
+
+    shell(shell && lhs) noexcept 
+        : buffer_(std::move(lhs.buffer_)),
+          input_(std::move(lhs.input_)),
+          argc_(boost::exchange(lhs.argc_, 0)),
+          argv_(boost::exchange(lhs.argv_, nullptr))
+#if defined(BOOST_PROCESS_V2_POSIX)
+        , free_argv_(boost::exchange(lhs.free_argv_, nullptr))
+#endif
+    {
+    }
+    shell& operator=(shell && lhs) noexcept
+    {
+        shell tmp(std::move(*this));
+        buffer_ = std::move(lhs.buffer_);
+        input_ = std::move(lhs.input_);
+        argc_  = boost::exchange(lhs.argc_, 0);
+        argv_ = boost::exchange(lhs.argv_, nullptr);
+#if defined(BOOST_PROCESS_V2_POSIX)
+        free_argv_ = boost::exchange(lhs.free_argv_, nullptr);
+#endif
+        return *this;
+    }
+
+    // the length of the parsed shell, including the executable
+    int argc() const { return argc_; }
+    char_type** argv() const { return argv_; }
+        
+    char_type** begin() const {return argv();}
+    char_type** end()   const {return argv() + argc();}
+
+    bool empty() const {return argc() == 0;}
+    std::size_t size() const {return static_cast<std::size_t>(argc()); }
+    /// Native representation of the arguments to be used - excluding the executable
+    BOOST_PROCESS_V2_DECL args_type args() const;
+    template<typename Environment = environment::current_view>
+    filesystem::path exe(Environment && env = environment::current()) const
+    {
+        if (argc() == 0)
+            return "";
+        else
+            return environment::find_executable(0[argv()], std::forward<Environment>(env)); 
+    }
+    BOOST_PROCESS_V2_DECL ~shell();
+
+  private:
+
+    friend struct make_cmd_shell_;
+
+    BOOST_PROCESS_V2_DECL void parse_();
+    
+    // storage in case we need a conversion
+    std::basic_string<char_type> buffer_;
+    basic_cstring_ref<char_type> input_{buffer_}; 
+    // impl details
+    int argc_ = 0;
+    char_type  ** argv_ = nullptr;
+
+#if defined(BOOST_PROCESS_V2_POSIX)
+    void(*free_argv_)(int, char **);
+#endif
+    
+};
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#if defined(BOOST_PROCESS_V2_HEADER_ONLY)
+
+#include <boost/process/v2/impl/shell.ipp>
+
+#endif
+
+#endif //BOOST_PROCESS_V2_ERROR_HPP

include/boost/process/v2/src.hpp

@@ -10,11 +10,16 @@
 #include <boost/process/v2/detail/config.hpp>
 
 #if defined(BOOST_PROCESS_V2_HEADER_ONLY)
-# error Do not compile Beast library source with BOOST_BEAST_HEADER_ONLY defined
+# error Do not compile Process V2 library source with BOOST_PROCESS_V2_HEADER_ONLY defined. You should probably define BOOST_PROCESS_V2_SEPARATE_COMPILATION
 #endif
 
 #include <boost/process/v2/impl/error.ipp>
 #include <boost/process/v2/impl/pid.ipp>
+#include <boost/process/v2/ext/impl/exe.ipp>
+#include <boost/process/v2/ext/impl/cwd.ipp>
+#include <boost/process/v2/ext/impl/cmd.ipp>
+#include <boost/process/v2/ext/impl/env.ipp>
+#include <boost/process/v2/ext/detail/impl/proc_info.ipp>
 #include <boost/process/v2/detail/impl/environment.ipp>
 #include <boost/process/v2/detail/impl/last_error.ipp>
 #include <boost/process/v2/detail/impl/throw_error.ipp>
@@ -22,5 +27,6 @@
 #include <boost/process/v2/impl/default_launcher.ipp>
 #include <boost/process/v2/impl/environment.ipp>
 #include <boost/process/v2/impl/process_handle.ipp>
+#include <boost/process/v2/impl/shell.ipp>
 
 #endif //BOOST_PROCESS_V2_SRC_HPP

include/boost/process/v2/start_dir.hpp

@@ -11,6 +11,7 @@
 #define BOOST_PROCESS_v2_START_DIR_HPP
 
 #include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/last_error.hpp>
 #include <boost/process/v2/default_launcher.hpp>
 
 BOOST_PROCESS_V2_BEGIN_NAMESPACE

include/boost/process/v2/stdio.hpp

@@ -11,8 +11,9 @@
 #define BOOST_PROCESS_V2_STDIO_HPP
 
 #include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/detail/last_error.hpp>
 #include <boost/process/v2/default_launcher.hpp>
-
+#include <cstddef>
 #if defined(BOOST_PROCESS_V2_STANDALONE)
 #include <asio/connect_pipe.hpp>
 #else
@@ -52,7 +53,7 @@ struct handle_closer
   DWORD flags{0xFFFFFFFFu};
 };
 
-template<DWORD Io>
+template<DWORD Target>
 struct process_io_binding
 {
   HANDLE prepare()
@@ -62,13 +63,17 @@ struct process_io_binding
     return hh;
   }
 
-  std::unique_ptr<void, handle_closer> h{::GetStdHandle(Io), false};
+  std::unique_ptr<void, handle_closer> h{::GetStdHandle(Target), false};
 
   static DWORD get_flags(HANDLE h)
   {
     DWORD res;
     if (!::GetHandleInformation(h, &res))
-      detail::throw_last_error("get_flags");
+    {
+      error_code ec;
+      BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec);
+      throw system_error(ec, "get_flags");
+    }
     return res;
   }
 
@@ -82,10 +87,11 @@ struct process_io_binding
   process_io_binding(FILE * f) : process_io_binding(_get_osfhandle(_fileno(f))) {}
   process_io_binding(HANDLE h) : h{h, get_flags(h)} {}
   process_io_binding(std::nullptr_t) : process_io_binding(filesystem::path("NUL")) {}
-  process_io_binding(const filesystem::path & pth)
+  template<typename T, typename = typename std::enable_if<std::is_same<T, filesystem::path>::value>::type>
+  process_io_binding(const T & pth)
     : h(::CreateFileW(
         pth.c_str(),
-        Io == STD_INPUT_HANDLE ? GENERIC_READ : GENERIC_WRITE,
+        Target == STD_INPUT_HANDLE ? GENERIC_READ : GENERIC_WRITE,
         FILE_SHARE_READ | FILE_SHARE_WRITE,
         nullptr,
         OPEN_ALWAYS,
@@ -101,11 +107,13 @@ struct process_io_binding
                      typename std::enable_if<Target != STD_INPUT_HANDLE, Executor*>::type = 0)
   {
     BOOST_PROCESS_V2_ASIO_NAMESPACE::detail::native_pipe_handle p[2];
+    error_code ec;
     BOOST_PROCESS_V2_ASIO_NAMESPACE::detail::create_pipe(p, ec);
     if (ec)
-      return ;
+      detail::throw_error(ec, "create_pipe");
+      
     h = std::unique_ptr<void, handle_closer>{p[1], true};
-    readable_pipe.assign(p[0], ec);
+    readable_pipe.assign(p[0]);
   }
 
 
@@ -114,11 +122,13 @@ struct process_io_binding
                      typename std::enable_if<Target == STD_INPUT_HANDLE, Executor*>::type = 0)
   {
     BOOST_PROCESS_V2_ASIO_NAMESPACE::detail::native_pipe_handle p[2];
+    error_code ec;
     BOOST_PROCESS_V2_ASIO_NAMESPACE::detail::create_pipe(p, ec);
     if (ec)
-      return ;
+      detail::throw_error(ec, "create_pipe");
+
     h = std::unique_ptr<void, handle_closer>{p[0], true};
-    writable_pipe.assign(p[1], ec);
+    writable_pipe.assign(p[1]);
   }
 };
 
@@ -170,7 +180,7 @@ struct process_io_binding
     fd = p[1];
     if (::fcntl(p[0], F_SETFD, FD_CLOEXEC) == -1)
     {
-      ec = detail::get_last_error();
+      BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
       return ;
     }
     fd_needs_closing = true;
@@ -189,7 +199,7 @@ struct process_io_binding
     fd = p[0];
     if (::fcntl(p[1], F_SETFD, FD_CLOEXEC) == -1)
     {
-      ec = detail::get_last_error();
+      BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
       return ;
     }
     fd_needs_closing = true;
@@ -289,11 +299,6 @@ struct process_stdio
     if (::dup2(err.fd, err.target) == -1)
       return error_code(errno, system_category());
 
-        
-    launcher.fd_whitelist.push_back(STDIN_FILENO);
-    launcher.fd_whitelist.push_back(STDOUT_FILENO);
-    launcher.fd_whitelist.push_back(STDERR_FILENO);
-
     return error_code {};
   };
 #endif

include/boost/process/v2/windows/as_user_launcher.hpp

@@ -107,7 +107,7 @@ struct as_user_launcher : default_launcher
 
     if (ok == 0)
     {
-      ec = detail::get_last_error();
+      BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
       detail::on_error(*this, executable, command_line, ec, inits...);
 
       if (process_information.hProcess != INVALID_HANDLE_VALUE)

include/boost/process/v2/windows/default_launcher.hpp

@@ -314,7 +314,7 @@ struct default_launcher
     auto ec__ = detail::get_last_error();
     if (ok == 0)
     {
-      ec = detail::get_last_error();
+      BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
       detail::on_error(*this, executable, command_line, ec, inits...);
 
       if (process_information.hProcess != INVALID_HANDLE_VALUE)
@@ -398,6 +398,11 @@ struct default_launcher
     return build_command_line_impl(pt, args, *std::begin(args));
   }
 
+  static std::wstring build_command_line(const filesystem::path & pt, const wchar_t * args)
+  {
+    return args;
+  }
+
 };
 
 

include/boost/process/v2/windows/with_logon_launcher.hpp

@@ -111,7 +111,7 @@ struct with_logon_launcher : default_launcher
 
     if (ok == 0)
     {
-      ec = detail::get_last_error();
+      BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
       detail::on_error(*this, executable, command_line, ec, inits...);
 
       if (process_information.hProcess != INVALID_HANDLE_VALUE)

include/boost/process/v2/windows/with_token_launcher.hpp

@@ -106,7 +106,7 @@ struct with_token_launcher : default_launcher
 
     if (ok == 0)
     {
-      ec = detail::get_last_error();
+      BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
       detail::on_error(*this, executable, command_line, ec, inits...);
 
       if (process_information.hProcess != INVALID_HANDLE_VALUE)

meta/libraries.json

@@ -1,6 +1,6 @@
 {
   "key": "process",
-  "name": "process",
+  "name": "Process",
   "authors": [
     "Merino Vidal", "Ilya Sokolov", "Felipe Tanus", 
     "Jeff Flinn", "Thomas Jarosch", "Boris Schaeling", "Klemens D. Morgenstern"

test/CMakeLists.txt

@@ -2,16 +2,16 @@ enable_testing()
 
 
 add_executable(boost_process_sparring_partner sparring_partner.cpp )
-target_link_libraries(boost_process_sparring_partner Boost::program_options Boost::filesystem Boost::iostreams)
+target_link_libraries(boost_process_sparring_partner Boost::process Boost::lambda Boost::program_options Boost::filesystem Boost::iostreams)
 
 add_executable(boost_process_exit_argc exit_argc.cpp)
 
 add_executable(boost_process_sub_launch sub_launcher.cpp)
-target_link_libraries(boost_process_sub_launch Boost::program_options Boost::filesystem Boost::iostreams Boost::system)
+target_link_libraries(boost_process_sub_launch Boost::process Boost::program_options Boost::filesystem Boost::iostreams Boost::system)
 
 function(process_standalone_test name )
     add_executable(boost_process_${name} ${name}.cpp)
-    target_link_libraries(boost_process_${name} Boost::system Boost::filesystem)
+    target_link_libraries(boost_process_${name} Boost::process Boost::system Boost::filesystem Boost::unit_test_framework)
     add_test(NAME boost_process_${name} COMMAND $<TARGET_FILE:boost_process_${name}> )
 endfunction()
 
@@ -21,7 +21,7 @@ process_standalone_test(pipe)
 
 function(process_sub_launch_test name )
     add_executable(boost_process_${name} ${name}.cpp)
-    target_link_libraries(boost_process_${name} Boost::system Boost::filesystem Boost::thread)
+    target_link_libraries(boost_process_${name} Boost::process Boost::system Boost::filesystem Boost::thread Boost::unit_test_framework)
     add_test(NAME boost_process_${name} COMMAND $<TARGET_FILE:boost_process_${name}> $<TARGET_FILE:boost_process_sub_launch> )
 endfunction()
 
@@ -30,7 +30,7 @@ process_sub_launch_test(group_wait)
 
 function(process_sparring_partner_launch name )
     add_executable(boost_process_${name} ${name}.cpp)
-    target_link_libraries(boost_process_${name} Boost::system Boost::filesystem Boost::thread)
+    target_link_libraries(boost_process_${name} Boost::process Boost::system Boost::filesystem Boost::thread Boost::unit_test_framework Boost::program_options)
     add_test(NAME boost_process_${name} COMMAND $<TARGET_FILE:boost_process_${name}> $<TARGET_FILE:boost_process_sparring_partner> )
 endfunction()
 
@@ -70,7 +70,11 @@ process_sparring_partner_launch(wait_for)
 process_sparring_partner_launch(on_exit)
 process_sparring_partner_launch(on_exit2)
 process_sparring_partner_launch(on_exit3)
-process_sparring_partner_launch(posix_specific)
-process_sparring_partner_launch(windows_specific)
+
+if(WIN32)
+    process_sparring_partner_launch(windows_specific)
+else()
+    process_sparring_partner_launch(posix_specific)
+endif()
 
 add_subdirectory(v2)

test/Jamfile.jam

@@ -100,8 +100,8 @@ test-suite with-valgrind :
     [ run env.cpp     program_options system filesystem       : [ test-options env ] : sparring_partner ]
     [ run group.cpp     system thread filesystem              : [ test-options group ] : sub_launch ]
     [ run group.cpp          system thread filesystem         : [ test-options group ] : sub_launch : <build>no <target-os>windows:<build>yes <define>BOOST_USE_WINDOWS_H=1 : group-windows-h ]
-    [ run group_wait.cpp     system thread filesystem         : [ test-options group_wait ] : sparring_partner : <target-os>darwin:<build>no ]
-	[ run limit_fd.cpp     program_options system filesystem  : [ test-options limit_fd ] : sparring_partner ]
+    [ run group_wait.cpp     system thread filesystem         : [ test-options group_wait ] : sparring_partner : <target-os>darwin:<build>no <target-os>freebsd:<build>no ]
+	[ run limit_fd.cpp     program_options system filesystem  : [ test-options limit_fd ] : sparring_partner : <target-os>freebsd:<build>no ]
     [ run run_exe.cpp filesystem                              : : sparring_partner ]
     [ run run_exe_path.cpp filesystem                         : [ test-options run_exe_path ] : sparring_partner ]
     [ run search_path.cpp filesystem system                   : [ test-options search_path ] : : <target-os>windows:<source>shell32 ]
@@ -111,7 +111,7 @@ test-suite with-valgrind :
     [ run system_test2.cpp filesystem system                  : [ test-options system_test2 ] : sparring_partner ]
     [ run spawn.cpp filesystem system                         : [ test-options spawn ] : sparring_partner ]
     [ run start_dir.cpp   filesystem system                   : [ test-options start_dir ] : sparring_partner ]
-    [ run terminate.cpp system filesystem                     : [ test-options terminate ] : sparring_partner ]
+    [ run terminate.cpp system filesystem                     : [ test-options terminate ] : sparring_partner : <target-os>freebsd:<build>no ]
     [ run throw_on_error.cpp system filesystem                : [ test-options throw_on_error ] : sparring_partner ]
     [ run wait.cpp system filesystem                          : [ test-options wait ] : sparring_partner ]
     [ run wait_for.cpp system filesystem                      : [ test-options wait_for ] : sparring_partner ]

test/cmd_test.cpp

@@ -83,3 +83,24 @@ BOOST_AUTO_TEST_CASE(implicit)
         BOOST_TEST_MESSAGE(ec.message());
     BOOST_CHECK_EQUAL(ret, 21);
 }
+
+BOOST_AUTO_TEST_CASE(empty_cmd)
+{
+    using boost::unit_test::framework::master_test_suite;
+
+    std::error_code ec;
+
+    fs::path pth = master_test_suite().argv[1];
+    auto env = boost::this_process::environment();
+
+    auto itr = std::find_if(env.begin(), env.end(),
+    [](const bp::native_environment::entry_type & e){return boost::to_upper_copy(e.get_name()) == "PATH";});
+
+    BOOST_REQUIRE(itr != env.end());
+
+    (*itr) += fs::canonical(fs::absolute(pth.parent_path())).string();
+    BOOST_REQUIRE(itr != env.end());
+
+    bp::system("sparring_partner \"\" ", ec);
+}
+

test/error.cpp

@@ -113,3 +113,17 @@ BOOST_AUTO_TEST_CASE(ignore_error)
         BOOST_CHECK_NO_THROW(bp::child c("doesnt-exit", bp::ignore_error));
     }
 }
+
+
+BOOST_AUTO_TEST_CASE(not_found)
+{
+    try
+    {
+        bp::child c("doesnt-exit");
+        BOOST_CHECK_MESSAGE(false, "Should throw");
+    }
+    catch( bp::process_error & se)
+    {
+        BOOST_CHECK(se.code());
+    }
+}

test/extensions.cpp

@@ -12,7 +12,6 @@
 #include <boost/test/included/unit_test.hpp>
 #include <boost/process/error.hpp>
 #include <system_error>
-#include <boost/bind.hpp>
 #include <boost/ref.hpp>
 #include <boost/process/child.hpp>
 #include <boost/process/extend.hpp>

test/group_wait.cpp

@@ -16,7 +16,7 @@
 
 #include <boost/asio.hpp>
 #include <boost/algorithm/string/predicate.hpp>
-
+#include <boost/scope_exit.hpp>
 #include <boost/process/error.hpp>
 #include <boost/process/io.hpp>
 #include <boost/process/args.hpp>
@@ -45,6 +45,10 @@ BOOST_AUTO_TEST_CASE(wait_group_test, *boost::unit_test::timeout(5))
             BOOST_REQUIRE(done.load());
         }};
 
+    BOOST_SCOPE_EXIT_ALL(&) {    
+        done.store(true);
+        thr.join();
+    };
 
     using boost::unit_test::framework::master_test_suite;
 
@@ -78,9 +82,6 @@ BOOST_AUTO_TEST_CASE(wait_group_test, *boost::unit_test::timeout(5))
 
     BOOST_CHECK(!c1.running());
     BOOST_CHECK(!c2.running());
-
-    done.store(true);
-    thr.join();
 }
 
 

test/limit_fd.cpp

@@ -40,12 +40,19 @@ BOOST_AUTO_TEST_CASE(leak_test, *boost::unit_test::timeout(5))
 {
     using boost::unit_test::framework::master_test_suite;
 
+    
+
 #if defined(BOOST_WINDOWS_API)
     const auto get_handle       = [](FILE * f)                       {return reinterpret_cast<bt::native_handle_type>(_get_osfhandle(_fileno(f)));};
     const auto socket_to_handle = [](::boost::winapi::UINT_PTR_ sock){return reinterpret_cast<::boost::winapi::HANDLE_>(sock);};
 #else
     const auto get_handle = [](FILE * f) {return fileno(f);};
     const auto socket_to_handle = [](int i){ return i;};
+
+#if !defined(__linux__)
+    return ;
+#endif
+
 #endif
 
     std::error_code ec;

test/v2/CMakeLists.txt

@@ -1,13 +1,18 @@
 enable_testing()
 
 add_library(boost_process_v2_test_impl test_impl.cpp)
-target_link_libraries(boost_process_v2_test_impl Boost::unit_test_framework Boost::process)
 target_compile_definitions(boost_process_v2_test_impl PUBLIC -DBOOST_PROCESS_V2_SEPARATE_COMPILATION=1)
-target_include_directories(boost_process_v2_test_impl PUBLIC ../../include)
+
+if (WIN32)
+    target_compile_definitions(boost_process_v2_test_impl PUBLIC WIN32_LEAN_AND_MEAN=1)
+    target_link_libraries(boost_process_v2_test_impl Boost::process Boost::unit_test_framework Boost::process Ntdll)
+else()
+    target_link_libraries(boost_process_v2_test_impl Boost::process Boost::unit_test_framework Boost::process)
+endif()
 
 function(boost_process_v2_standalone_test name)
     add_executable(boost_process_v2_${name} ${name}.cpp)
-    target_link_libraries(boost_process_v2_${name} Boost::system Boost::filesystem boost_process_v2_test_impl)
+    target_link_libraries(boost_process_v2_${name} Boost::process Boost::system Boost::filesystem boost_process_v2_test_impl)
     add_test(NAME boost_process_v2_${name} COMMAND $<TARGET_FILE:boost_process_v2_${name}> )
 endfunction()
 
@@ -15,19 +20,22 @@ boost_process_v2_standalone_test(utf8)
 boost_process_v2_standalone_test(cstring_ref)
 boost_process_v2_standalone_test(pid)
 boost_process_v2_standalone_test(environment)
+boost_process_v2_standalone_test(shell)
 
 add_library(boost_process_v2_header_test header_1.cpp header_2.cpp)
-
+target_link_libraries(boost_process_v2_header_test PUBLIC Boost::process)
 add_executable(boost_process_v2_test_target target.cpp)
-target_link_libraries(boost_process_v2_test_target PUBLIC Boost::system)
-target_include_directories(boost_process_v2_test_target PUBLIC ../../../..)
+target_link_libraries(boost_process_v2_test_target PUBLIC Boost::process Boost::system)
 
 function(boost_process_v2_test_with_target name)
     add_executable(boost_process_v2_${name} ${name}.cpp)
-    target_link_libraries(boost_process_v2_${name} Boost::system Boost::filesystem boost_process_v2_test_impl)
+    target_link_libraries(boost_process_v2_${name} Boost::process Boost::system Boost::filesystem boost_process_v2_test_impl)
     add_dependencies(boost_process_v2_${name} boost_process_v2_test_target)
     add_test(NAME boost_process_v2_${name} COMMAND $<TARGET_FILE:boost_process_v2_${name}>
                                                 -- $<TARGET_FILE:boost_process_v2_test_target>)
+
+
 endfunction()
 
-boost_process_v2_test_with_target(process)
+boost_process_v2_test_with_target(process)
+boost_process_v2_test_with_target(ext)

test/v2/Jamfile.jam

@@ -21,7 +21,12 @@ project : requirements
   <toolset>msvc:<define>_CRT_SECURE_NO_DEPRECATE
   <toolset>msvc:<cxxflags>/bigobj
   <target-os>windows:<define>WIN32_LEAN_AND_MEAN
+  <target-os>windows:<define>_WIN32_WINNT=0x0601
   <target-os>linux:<linkflags>-lpthread
+  <target-os>freebsd:<linkflags>-lutil
+  <target-os>freebsd:<linkflags>-lkvm
+  <target-os>freebsd:<linkflags>-lprocstat
+  <target-os>bsd:<linkflags>-lkvm
   <os>NT,<toolset>cw:<library>ws2_32
   <os>NT,<toolset>gcc:<library>ws2_32
   <define>BOOST_PROCESS_V2_SEPARATE_COMPILATION=1
@@ -46,17 +51,21 @@ lib test_impl : test_impl.cpp filesystem :
         <link>static
         <target-os>windows:<source>shell32
         <target-os>windows:<source>user32
+        <target-os>windows:<source>Ntdll
+        <target-os>windows:<source>Advapi32
         ;
 
 test-suite standalone :
     [ run utf8.cpp test_impl ]
     [ run cstring_ref.cpp test_impl ]
     [ run environment.cpp test_impl ]
-    [ run pid.cpp test_impl ]
+    [ run pid.cpp   test_impl : : : <target-os>darwin:<build>no ]
+    [ run shell.cpp test_impl ]
     ;
 
 test-suite with_target :
     [ run process.cpp test_impl : --log_level=all --catch_system_errors=no -- : target ]
     [ run windows.cpp test_impl : --log_level=all --catch_system_errors=no -- : target : <build>no <target-os>windows:<build>yes <target-os>windows:<source>Advapi32 ]
+    [ run ext.cpp     test_impl : --log_level=all --catch_system_errors=no -- : target : <target-os>darwin:<build>no ]
     ;
 

test/v2/environment.cpp

@@ -95,9 +95,9 @@ BOOST_AUTO_TEST_CASE(environment)
 #else
     std::unordered_map<std::wstring, std::wstring> custom_env = 
         {
-            L"HOME", L"/home/byzantium",
-            L"HOMEDRIVE", L"X:",
-            L"HOMEPATH", L"\\users\\theodora"
+            {L"HOME", L"/home/byzantium"},
+            {L"HOMEDRIVE", L"X:"},
+            {L"HOMEPATH", L"\\users\\theodora"}
         };
 
     std::vector<std::wstring> custom_env2 = 
@@ -106,8 +106,8 @@ BOOST_AUTO_TEST_CASE(environment)
             {L"HOMEDRIVE=X:"},
             {L"HOMEPATH=\\users\\theodora"}
         };
-    BOOST_CHECK_EQUAL(bpe::home(custom_env), L"X:\\Users\\theodora");
-    BOOST_CHECK_EQUAL(bpe::home(custom_env2), L"X:\\Users\\theodora");
+    BOOST_CHECK_EQUAL(bpe::home(custom_env), "X:\\users\\theodora");
+    BOOST_CHECK_EQUAL(bpe::home(custom_env2), "X:\\users\\theodora");
 
 #endif
 

test/v2/ext.cpp

@@ -0,0 +1,180 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/process/v2/ext/cmd.hpp>
+#include <boost/process/v2/ext/cwd.hpp>
+#include <boost/process/v2/ext/env.hpp>
+#include <boost/process/v2/ext/exe.hpp>
+#include <boost/process/v2/pid.hpp>
+#include <boost/process/v2/process.hpp>
+#include <boost/process/v2/start_dir.hpp>
+#include <boost/test/unit_test.hpp>
+
+BOOST_AUTO_TEST_SUITE(ext)
+
+BOOST_AUTO_TEST_CASE(test_exe)
+{
+    using boost::unit_test::framework::master_test_suite;
+
+    namespace bp2 = boost::process::v2;
+    auto pth = bp2::ext::exe(bp2::current_pid());
+    BOOST_CHECK(!pth.empty());
+    BOOST_CHECK_EQUAL(bp2::filesystem::canonical(master_test_suite().argv[0]).string(),
+                      bp2::filesystem::canonical(pth).string());
+}
+
+
+BOOST_AUTO_TEST_CASE(test_child_exe)
+{
+    namespace bp2 = boost::process::v2;
+    using boost::unit_test::framework::master_test_suite;
+    const auto pth = bp2::filesystem::canonical(master_test_suite().argv[0]);
+
+    boost::asio::io_context ctx;
+    bp2::process proc(ctx, pth, {"sleep", "10000"});
+    BOOST_CHECK_EQUAL(bp2::ext::exe(proc.handle()), pth);
+}
+
+BOOST_AUTO_TEST_CASE(cmd)
+{
+    using boost::unit_test::framework::master_test_suite;
+
+    namespace bp2 = boost::process::v2;
+    auto cmd = bp2::ext::cmd(bp2::current_pid());
+
+    // the test framework drops a bunch of args.
+    bp2::basic_cstring_ref<typename bp2::shell::char_type> ref(cmd.argv()[0]);
+    BOOST_CHECK_EQUAL(
+        bp2::detail::conv_string<char>(
+            ref.data(), ref.size()
+            ), master_test_suite().argv[0]);
+
+    auto cm = cmd.argv() + (cmd.argc() - master_test_suite().argc);
+    for (auto i = 1; i < master_test_suite().argc; i++)
+    {
+      bp2::basic_cstring_ref<typename bp2::shell::char_type> ref(cm[i]);
+
+      BOOST_CHECK_EQUAL(bp2::detail::conv_string<char>(ref.data(), ref.size()),
+                        master_test_suite().argv[i]);
+    }
+
+}
+
+
+BOOST_AUTO_TEST_CASE(cmd_exe)
+{
+    using boost::unit_test::framework::master_test_suite;
+    const auto pth =  master_test_suite().argv[0];
+
+    namespace bp2 = boost::process::v2;
+
+    boost::asio::io_context ctx;
+    std::vector<std::string> args = {"sleep", "10000", "moar", "args", "  to test "};
+    bp2::process proc(ctx, pth, args);
+    auto cm = bp2::ext::cmd(proc.handle());
+
+    bp2::basic_cstring_ref<typename bp2::shell::char_type> ref(cm.argv()[0]);
+    BOOST_CHECK_EQUAL(bp2::detail::conv_string<char>(ref.data(), ref.size()), pth);
+
+    BOOST_REQUIRE_EQUAL(cm.argc(), args.size() + 1);
+    for (auto i = 0; i < args.size(); i++)
+    {
+      ref = cm.argv()[i + 1];
+
+      BOOST_CHECK_EQUAL(bp2::detail::conv_string<char>(ref.data(), ref.size()), args[i]);
+    }
+
+}
+
+
+BOOST_AUTO_TEST_CASE(test_cwd)
+{
+    namespace bp2 = boost::process::v2;
+    auto pth = bp2::ext::cwd(bp2::current_pid()).string();
+    if (pth.back() == '\\')
+        pth.pop_back();
+    BOOST_CHECK_EQUAL(pth, bp2::filesystem::current_path());
+}
+
+BOOST_AUTO_TEST_CASE(test_cwd_exe)
+{
+    using boost::unit_test::framework::master_test_suite;
+    namespace bp2 = boost::process::v2;
+    const auto pth = bp2::filesystem::absolute(master_test_suite().argv[0]);
+
+    auto tmp = bp2::filesystem::temp_directory_path();
+
+    boost::asio::io_context ctx;
+    bp2::process proc(ctx, pth, {"sleep", "10000"},
+                      bp2::process_start_dir{tmp});
+    auto tt = bp2::ext::cwd(proc.handle()).string();
+    if (tt.back() == '\\')
+        tt.pop_back();
+    BOOST_CHECK_EQUAL(tt, tmp);
+    bp2::error_code ec;
+    bp2::filesystem::remove(tmp, ec);
+}
+
+BOOST_AUTO_TEST_CASE(test_env)
+{
+    namespace bp2 = boost::process::v2;
+    auto env = bp2::ext::env(bp2::current_pid());
+
+    std::size_t e = 0;
+
+    for (const auto & kp : bp2::environment::current())
+    {
+        auto itr = std::find_if(env.begin(), env.end(),
+                                [&](bp2::environment::key_value_pair_view kp_)
+                                {
+                                   return kp.key() == kp_.key();
+                                });
+        if (itr != env.end())
+        {
+            BOOST_CHECK_EQUAL(kp.value(), (*itr).value());
+            e++;
+        }
+
+    }
+    BOOST_CHECK_GT(e, 0u);
+}
+
+BOOST_AUTO_TEST_CASE(test_env_exe)
+{
+    using boost::unit_test::framework::master_test_suite;
+    const auto pth =  master_test_suite().argv[0];
+    namespace bp2 = boost::process::v2;
+
+    auto tmp = bp2::filesystem::temp_directory_path();
+
+    boost::asio::io_context ctx;
+
+    std::vector<bp2::environment::key_value_pair> new_env;
+    {
+        auto cr = bp2::environment::current();
+        new_env.assign(cr.begin(), cr.end());
+    }
+
+    new_env.push_back("FOO=42");
+    new_env.push_back("BAR=FOO");
+
+        bp2::process proc(ctx, pth, {"sleep", "10000"},
+                      bp2::process_environment(new_env));
+
+    auto env = bp2::ext::env(proc.handle());
+    for (const auto & kp : new_env)
+    {
+        auto itr = std::find_if(env.begin(), env.end(),
+                                [&](bp2::environment::key_value_pair_view kp_)
+                                {
+                                    return kp.key() == kp_.key();
+                                });
+        BOOST_REQUIRE(itr != env.end());
+        BOOST_CHECK_EQUAL(kp.value(), (*itr).value());
+    }
+}
+
+BOOST_AUTO_TEST_SUITE_END()

test/v2/pid.cpp

@@ -1,4 +1,5 @@
 // Copyright (c) 2022 Klemens D. Morgenstern
+// Copyright (c) 2022 Samuel Venable
 //
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
@@ -7,9 +8,35 @@
 
 #include <boost/test/unit_test.hpp>
 
+#include <algorithm>
+#include <vector>
 
 BOOST_AUTO_TEST_CASE(test_pid)
 {
     namespace bp2 = boost::process::v2;
     BOOST_CHECK_NE(bp2::current_pid(), static_cast<bp2::pid_type>(0));
-}
+
+    auto all = bp2::all_pids();
+    auto itr = std::find(all.begin(), all.end(), bp2::current_pid());
+
+    BOOST_CHECK_GT(all.size(), 0u);
+    BOOST_CHECK(itr != all.end());
+
+    std::vector<bp2::pid_type> children, grand_children; 
+    auto grand_child_pids = [](bp2::pid_type pid, 
+        std::vector<bp2::pid_type> & children, 
+        std::vector<bp2::pid_type> & grand_children) 
+    {  
+        children = bp2::child_pids(pid);
+        for (unsigned i = 0; i < children.size(); i++) 
+        {
+            std::vector<bp2::pid_type> tmp1;
+            std::vector<bp2::pid_type> tmp2 = bp2::child_pids(children[i]);
+            tmp1.insert(std::end(tmp1), std::begin(tmp2), std::end(tmp2));
+            grand_children = tmp1;
+        }
+        return (!children.empty() || !grand_children.empty());
+    };
+    BOOST_CHECK_NE(grand_child_pids(bp2::root_pid, children, grand_children), false);
+
+}

test/v2/process.cpp

@@ -24,6 +24,7 @@
 #include <boost/process/v2/start_dir.hpp>
 #include <boost/process/v2/execute.hpp>
 #include <boost/process/v2/stdio.hpp>
+#include <boost/process/v2/bind_launcher.hpp>
 
 #include <boost/test/unit_test.hpp>
 #include <boost/asio/io_context.hpp>
@@ -149,6 +150,8 @@ BOOST_AUTO_TEST_CASE(terminate)
   
   BOOST_CHECK_MESSAGE(!sh.empty(), sh);
   bpv::process proc(ctx, sh, {});
+  proc.suspend();
+  proc.resume();
   proc.terminate();
   proc.wait();
 }
@@ -159,11 +162,17 @@ BOOST_AUTO_TEST_CASE(request_exit)
 
   auto sh = closable();
   BOOST_CHECK_MESSAGE(!sh.empty(), sh);
-  bpv::process proc(ctx, sh, {}
+
+  asio::readable_pipe rp{ctx};
+  asio::writable_pipe wp{ctx};
+  asio::connect_pipe(rp, wp);
+
+  bpv::process proc(ctx, sh, {}, bpv::process_stdio{wp}
 #if defined(ASIO_WINDOWS)
     , asio::windows::show_window_minimized_not_active
 #endif
     );
+  BOOST_CHECK(proc.running());
   std::this_thread::sleep_for(std::chrono::milliseconds(250));
   proc.request_exit();
   proc.wait();
@@ -188,6 +197,8 @@ void trim_end(std::string & str)
 {
     auto itr = std::find_if(str.rbegin(), str.rend(), &std::char_traits<char>::not_eof);
     str.erase(itr.base(), str.end());
+    if (!str.empty() && str.back() == '\r')
+      str.pop_back();
 }
 
 BOOST_AUTO_TEST_CASE(print_args_out)
@@ -210,6 +221,8 @@ BOOST_AUTO_TEST_CASE(print_args_out)
   bpv::error_code ec;
 
   auto sz = asio::read(rp, st,  ec);
+  while (ec == asio::error::interrupted)
+      sz += asio::read(rp, st,  ec);
 
   BOOST_CHECK_NE(sz, 0u);
   BOOST_CHECK_MESSAGE((ec == asio::error::broken_pipe) || (ec == asio::error::eof), ec.message());
@@ -256,6 +269,8 @@ BOOST_AUTO_TEST_CASE(print_args_err)
   bpv::error_code ec;
 
   auto sz = asio::read(rp, st,  ec);
+  while (ec == asio::error::interrupted)
+      sz += asio::read(rp, st,  ec);
 
   BOOST_CHECK_NE(sz , 0u);
   BOOST_CHECK_MESSAGE((ec == asio::error::broken_pipe) || (ec == asio::error::eof), ec.message());
@@ -309,6 +324,9 @@ BOOST_AUTO_TEST_CASE(echo_file)
   bpv::error_code ec;
 
   auto sz = asio::read(rp, asio::dynamic_buffer(out),  ec);
+  while (ec == asio::error::interrupted)
+      sz += asio::read(rp, asio::dynamic_buffer(out),  ec);
+
   BOOST_CHECK(sz != 0);
   BOOST_CHECK_MESSAGE((ec == asio::error::broken_pipe) || (ec == asio::error::eof), ec.message());
   BOOST_CHECK_MESSAGE(out == test_data, out);
@@ -333,6 +351,9 @@ BOOST_AUTO_TEST_CASE(print_same_cwd)
   bpv::error_code ec;
 
   auto sz = asio::read(rp, asio::dynamic_buffer(out),  ec);
+  while (ec == asio::error::interrupted)
+      sz += asio::read(rp, asio::dynamic_buffer(out),  ec);
+
   BOOST_CHECK(sz != 0);
   BOOST_CHECK_MESSAGE((ec == asio::error::broken_pipe) || (ec == asio::error::eof), ec.message());
   BOOST_CHECK_MESSAGE(bpv::filesystem::path(out) == bpv::filesystem::current_path(),
@@ -354,18 +375,21 @@ BOOST_AUTO_TEST_CASE(popen)
 
 
     // default CWD
-    bpv::popen proc(ctx, pth, {"echo"});
+    bpv::popen proc(/*bpv::default_process_launcher(), */ctx, pth, {"echo"});
 
     asio::write(proc, asio::buffer("FOOBAR"));
-
     proc.get_stdin().close();
 
     std::string res;
     boost::system::error_code ec;
     std::size_t n = asio::read(proc, asio::dynamic_buffer(res), ec);
-    res.resize(n - 1);
-    BOOST_CHECK_EQUAL(ec, asio::error::eof);
+    while (ec == asio::error::interrupted)
+        n += asio::read(rp, asio::dynamic_buffer(res),  ec);
+
+    BOOST_CHECK_MESSAGE(ec == asio::error::eof || ec == asio::error::broken_pipe, ec.message());
+    BOOST_REQUIRE_GE(n, 1u);
     // remove EOF
+    res.pop_back();
     BOOST_CHECK_EQUAL(res, "FOOBAR");
 
     proc.wait();
@@ -395,6 +419,9 @@ BOOST_AUTO_TEST_CASE(print_other_cwd)
   bpv::error_code ec;
 
   auto sz = asio::read(rp, asio::dynamic_buffer(out),  ec);
+  while (ec == asio::error::interrupted)
+    sz += asio::read(rp, asio::dynamic_buffer(out),  ec);
+
   BOOST_CHECK(sz != 0);
   BOOST_CHECK_MESSAGE((ec == asio::error::broken_pipe) || (ec == asio::error::eof), ec.message());
   BOOST_CHECK_MESSAGE(bpv::filesystem::path(out) == target,
@@ -425,11 +452,14 @@ std::string read_env(const char * name, Inits && ... inits)
   std::string out;
   bpv::error_code ec;
 
-  const auto sz = asio::read(rp, asio::dynamic_buffer(out),  ec);
+  auto sz = asio::read(rp, asio::dynamic_buffer(out),  ec);
+  while (ec == asio::error::interrupted)
+    sz += asio::read(rp, asio::dynamic_buffer(out),  ec);
+
   BOOST_CHECK_MESSAGE((ec == asio::error::broken_pipe) || (ec == asio::error::eof), ec.message());
   out.resize(sz);
   trim_end(out);
-  printf("Read env (%ld) %s: '%s'\n", sz, name, out.c_str());
+  printf("Read env (%ld) %s: '%s'\n", static_cast<long>(sz), name, out.c_str());
 
   proc.wait();
   BOOST_CHECK_EQUAL(proc.exit_code(), 0);
@@ -449,12 +479,12 @@ BOOST_AUTO_TEST_CASE(environment)
   BOOST_CHECK_EQUAL("FOO-BAR", read_env("FOOBAR", bpv::process_environment{sub_env}));
   
   sub_env.push_back("XYZ=ZYX");
-  auto itr = std::find_if(sub_env.begin(), sub_env.end(), [](const bpv::environment::key_value_pair & kv) {return kv.key() == "PATH";});
+  auto itr = std::find_if(sub_env.begin(), sub_env.end(), [](const bpv::environment::key_value_pair & kv) {return kv.key() == bpv::environment::key("PATH");});
   path += static_cast<char>(bpv::environment::delimiter);
   path += "/bar/foo";
   bpv::environment::value pval = itr->value();
   pval.push_back("/bar/foo");
-  *itr = bpv::environment::key_value_pair("PATH", pval);
+  *itr = bpv::environment::key_value_pair(bpv::environment::key("PATH"), pval);
   BOOST_CHECK_EQUAL(path, read_env("PATH", bpv::process_environment{sub_env}));
 
 #if defined(BOOST_PROCESS_V2_WINDOWS)
@@ -462,12 +492,73 @@ BOOST_AUTO_TEST_CASE(environment)
   BOOST_CHECK_EQUAL("FOO-BAR", read_env("FOOBAR", bpv::process_environment{L"FOOBAR=FOO-BAR", wpath.c_str()}));
   wpath += bpv::environment::delimiter;
   wpath += L"C:\\bar\\foo";
-  BOOST_CHECK_EQUAL(wpath.substr(5), read_env("pATH",   bpv::process_environment{wpath.c_str(), std::wstring(L"XYZ=ZYX")}));
+  BOOST_CHECK_EQUAL(
+    bpv::detail::conv_string<char>(wpath.c_str() + 5, wpath.size() - 5)
+    , read_env("pATH",   bpv::process_environment{wpath.c_str(), std::wstring(L"XYZ=ZYX")}));
 #endif
 
   BOOST_CHECK_EQUAL(read_env("PATH", bpv::process_environment(bpv::environment::current())), ::getenv("PATH"));
 }
 
+BOOST_AUTO_TEST_CASE(exit_code_as_error)
+{
+  using boost::unit_test::framework::master_test_suite;
+  const auto pth = bpv::filesystem::absolute(master_test_suite().argv[1]);
+
+  asio::io_context ctx;
+
+  bpv::process proc1(ctx, pth, {"exit-code", "0"});
+  bpv::process proc2(ctx, pth, {"exit-code", "2"});
+  bpv::process proc3(ctx, pth, {"sleep", "2000"});
+
+  int called = 0;
+  
+  proc3.terminate();
+
+  proc1.async_wait(bpv::code_as_error([&](bpv::error_code ec){called ++; BOOST_CHECK(!ec);}));
+  proc2.async_wait(bpv::code_as_error([&](bpv::error_code ec){called ++; BOOST_CHECK_MESSAGE(ec, ec.message());}));
+  proc3.async_wait(bpv::code_as_error([&](bpv::error_code ec){called ++; BOOST_CHECK_MESSAGE(ec, ec.message());}));
+
+  ctx.run();
+  BOOST_CHECK_EQUAL(called, 3);
+
+}
+
+BOOST_AUTO_TEST_CASE(bind_launcher)
+{
+  using boost::unit_test::framework::master_test_suite;
+  const auto pth = bpv::filesystem::absolute(master_test_suite().argv[1]);
+
+  asio::io_context ctx;
+
+  asio::readable_pipe rp{ctx};
+  asio::writable_pipe wp{ctx};
+  asio::connect_pipe(rp, wp);
+
+  auto target = bpv::filesystem::canonical(bpv::filesystem::temp_directory_path());
+
+  auto l = bpv::bind_default_launcher(bpv::process_start_dir(target));
+
+  std::vector<std::string> args = {"print-cwd"};
+  // default CWD
+  bpv::process proc = l(ctx, pth, args, bpv::process_stdio{/*.in=*/{}, /*.out=*/wp});
+  wp.close();
+
+  std::string out;
+  bpv::error_code ec;
+
+  auto sz = asio::read(rp, asio::dynamic_buffer(out),  ec);
+  while (ec == asio::error::interrupted)
+    sz += asio::read(rp, asio::dynamic_buffer(out),  ec);
+
+  BOOST_CHECK(sz != 0);
+  BOOST_CHECK_MESSAGE((ec == asio::error::broken_pipe) || (ec == asio::error::eof), ec.message());
+  BOOST_CHECK_MESSAGE(bpv::filesystem::path(out) == target,
+                      bpv::filesystem::path(out) << " != " << target);
+
+  proc.wait();
+  BOOST_CHECK_MESSAGE(proc.exit_code() == 0, proc.exit_code() << " from " << proc.native_exit_code());
+}
 
 BOOST_AUTO_TEST_SUITE_END();
 

test/v2/shell.cpp

@@ -0,0 +1,56 @@
+// Copyright (c) 2022 Klemens D. Morgenstern
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+// Disable autolinking for unit tests.
+#if !defined(BOOST_ALL_NO_LIB)
+#define BOOST_ALL_NO_LIB 1
+#endif // !defined(BOOST_ALL_NO_LIB)
+
+// Test that header file is self-contained.
+#include <boost/process/v2/shell.hpp>
+#include <boost/process/v2/process.hpp>
+#include <boost/asio/io_context.hpp>
+
+#include <boost/test/unit_test.hpp>
+
+#if defined(BOOST_PROCESS_V2_WINDOWS)
+    #define STR(Value) L##Value
+    #define STR_VIEW(Value) boost::process::v2::wcstring_ref(STR(Value))
+#else
+    #define STR(Value) Value
+    #define STR_VIEW(Value) boost::process::v2::cstring_ref(STR(Value))
+#endif
+
+
+BOOST_AUTO_TEST_CASE(test_shell_parser)
+{
+    using boost::process::v2::shell;
+    namespace bpv = boost::process::v2;
+#if defined(BOOST_PROCESS_V2_POSIX)
+    BOOST_CHECK_THROW(shell("foo \""), bpv::system_error);
+#endif
+
+    auto sh = shell(STR("foo bar \"foo bar\""));   
+    BOOST_CHECK(sh.argc() == 3u);
+    BOOST_CHECK(sh.argv()[0] == STR_VIEW("foo"));
+    BOOST_CHECK(sh.argv()[1] == STR_VIEW("bar"));
+    BOOST_CHECK(sh.argv()[2] == STR_VIEW("foo bar"));
+
+#if defined(BOOST_PROCESS_V2_POSIX)
+    auto raw_shell = "sh -c true";
+#else
+    auto raw_shell = "cmd /c exit 0";
+#endif
+    sh = shell(raw_shell);
+
+    auto exe = sh.exe();
+    BOOST_CHECK(bpv::filesystem::exists(exe));
+
+    boost::asio::io_context ctx;
+    bpv::process proc{ctx, exe, sh.args()};
+
+    proc.wait();
+    BOOST_CHECK_EQUAL(proc.exit_code(), 0);
+}

test/v2/windows.cpp

@@ -60,7 +60,7 @@ BOOST_AUTO_TEST_CASE(creation_flags)
     BOOST_CHECK_EQUAL(proc.wait() & ~EXTENDED_STARTUPINFO_PRESENT, 0);
 
     proc = bpv::process{ctx, master_test_suite().argv[1], {"creation-flags"}, bpv::windows::process_creation_flags<STARTF_TITLEISAPPID>()};
-    BOOST_CHECK(proc);
+    BOOST_CHECK(proc.running());
     BOOST_CHECK_EQUAL(proc.wait() & ~EXTENDED_STARTUPINFO_PRESENT, STARTF_TITLEISAPPID);
 }
 

test/wait_for.cpp

@@ -40,7 +40,7 @@ BOOST_AUTO_TEST_CASE(wait_for)
 
 
     BOOST_CHECK(!c.wait_for(std::chrono::milliseconds(200)));
-    BOOST_CHECK( c.wait_for(std::chrono::milliseconds(1000)));
+    BOOST_CHECK( c.wait_for(std::chrono::milliseconds(2000)));
 
     auto timeout_t = std::chrono::system_clock::now();