v2: sync initial value for exit code with v1

The initial value for the exit_code (0x7f) in v2 doesn't work with musl libc.
Here WIFSIGNALED(0x7f) expands to a non-zero value:

http://git.musl-libc.org/cgit/musl/tree/include/sys/wait.h#n54

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

@@ -14,15 +14,25 @@
 #include <boost/process/pipe.hpp>
 #include <boost/process/detail/posix/handler.hpp>
 #include <unistd.h>
+#include <array>
+#include <boost/process/detail/used_handles.hpp>
 
 namespace boost { namespace process { namespace detail { namespace posix {
 
 template<int p1, int p2>
-struct pipe_out : handler_base_ext
+struct pipe_out : handler_base_ext, ::boost::process::detail::uses_handles
 {
     int sink;
     int source; //opposite end
 
+    std::array<int, 4> get_used_handles()
+    {
+        const auto pp1 = p1 != -1 ? p1 : p2;
+        const auto pp2 = p2 != -1 ? p2 : p1;
+
+        return {source, sink, pp1, pp2};
+    }
+
     pipe_out(int sink, int source) : sink(sink), source(source) {}
 
     template<typename T>

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

@@ -65,7 +65,7 @@ inline auto native_environment_impl<Char>::get(const pointer_type id) -> string_
     {
         auto err =  ::boost::winapi::GetLastError();
         if (err == ::boost::winapi::ERROR_ENVVAR_NOT_FOUND_)//well, then we consider that an empty value
-            return "";
+            return string_type();
         else
             throw process_error(std::error_code(err, std::system_category()),
                                "GetEnvironmentVariable() failed");

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

@@ -84,22 +84,32 @@ struct basic_process_handle_win
 
 
     template<typename Executor1>
-    basic_process_handle_win(basic_process_handle_win<Executor1> && handle)
-            : pid_(handle.pid_), handle_(std::move(handle.handle_))
+    basic_process_handle_win(basic_process_handle_win<Executor1> && other)
+            : pid_(other.pid_), handle_(std::move(other.handle_))
     {
+      other.pid_ = static_cast<DWORD>(-1);
     }
 
-    basic_process_handle_win(basic_process_handle_win && handle) 
-        :  pid_(handle.id()), handle_(std::move(handle.handle_))
+    basic_process_handle_win(basic_process_handle_win && other)
+        :  pid_(other.pid_), handle_(std::move(other.handle_))
     {
-        handle.pid_ = static_cast<DWORD>(-1);
+      other.pid_ = static_cast<DWORD>(-1);
     }
 
-    basic_process_handle_win& operator=(basic_process_handle_win && handle)
+    basic_process_handle_win& operator=(basic_process_handle_win && other)
     {
-        pid_ = handle.pid_;
-        handle_ = std::move(handle.handle_);
-        handle.pid_ = static_cast<DWORD>(-1);
+        pid_ = other.pid_;
+        handle_ = std::move(other.handle_);
+        other.pid_ = static_cast<DWORD>(-1);
+        return *this;
+    }
+
+    template<typename Executor1>
+    basic_process_handle_win& operator=(basic_process_handle_win<Executor1> && other)
+    {
+        pid_ = other.pid_;
+        handle_ = std::move(other.handle_);
+        other.pid_ = static_cast<DWORD>(-1);
         return *this;
     }
 

include/boost/process/v2/environment.hpp

@@ -13,10 +13,13 @@
 #include <boost/process/v2/detail/config.hpp>
 #include <boost/process/v2/cstring_ref.hpp>
 #include <boost/process/v2/detail/utf8.hpp>
+
 #include <boost/type_traits.hpp>
+
 #include <functional>
 #include <memory>
 #include <numeric>
+#include <vector>
 
 #if !defined(GENERATING_DOCUMENTATION)
 #if defined(BOOST_PROCESS_V2_WINDOWS)

include/boost/process/v2/execute.hpp

@@ -110,7 +110,7 @@ async_execute(basic_process<Executor> proc,
                          WaitHandler && handler BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(Executor))
 {
     std::unique_ptr<basic_process<Executor>> pro_(new basic_process<Executor>(std::move(proc)));
-    auto exec = proc.get_executor();
+    auto exec = pro_->get_executor();
     return BOOST_PROCESS_V2_ASIO_NAMESPACE::async_compose<WaitHandler, void(error_code, int)>(
             detail::execute_op<Executor>{std::move(pro_)}, handler, exec);
 }

include/boost/process/v2/exit_code.hpp

@@ -72,7 +72,11 @@ typedef int native_exit_code_type;
 
 namespace detail
 {
-constexpr native_exit_code_type still_active = 0x7f;
+constexpr native_exit_code_type still_active = 0x17f;
+static_assert(WIFSTOPPED(still_active), "Expected still_active to indicate WIFSTOPPED");
+static_assert(!WIFEXITED(still_active), "Expected still_active to not indicate WIFEXITED");
+static_assert(!WIFSIGNALED(still_active), "Expected still_active to not indicate WIFSIGNALED");
+static_assert(!WIFCONTINUED(still_active), "Expected still_active to not indicate WIFCONTINUED");
 }
 
 inline bool process_is_running(int code)

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

@@ -125,7 +125,6 @@ filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code
 
 #elif defined(__FreeBSD__)
 
-// FIXME: Add error handling.
 filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code & ec) 
 {
     filesystem::path path;
@@ -139,9 +138,7 @@ filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code
                 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);
             }
@@ -160,7 +157,6 @@ filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code
 
 #elif defined(__DragonFly__)
 
-// FIXME: Add error handling.
 filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code & ec) 
 {
     filesystem::path path;
@@ -185,7 +181,8 @@ filesystem::path cwd(boost::process::v2::pid_type pid, boost::system::error_code
         }
         else
             BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
-        pclose(fp);
+        if (pclose(fp) == -1)
+            BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)
     }
     else
         BOOST_PROCESS_V2_ASSIGN_LAST_ERROR(ec)

include/boost/process/v2/pid.hpp

@@ -9,6 +9,8 @@
 #include <boost/process/v2/detail/config.hpp>
 #include <boost/process/v2/detail/throw_error.hpp>
 
+#include <vector>
+
 BOOST_PROCESS_V2_BEGIN_NAMESPACE
 
 #if defined(GENERATING_DOCUMENTATION)

include/boost/process/v2/posix/detail/close_handles.ipp

@@ -101,7 +101,7 @@ void close_all(const std::vector<int> & whitelist, error_code & ec)
              idx++)
         {
             const auto mine = whitelist[idx];
-            const auto next = whitelist[idx];
+            const auto next = whitelist[idx + 1];
             if ((mine + 1) != next && (mine != next))
             {
                 ::close_range(mine + 1, next - 1, 0);
@@ -132,7 +132,7 @@ void close_all(const std::vector<int> & whitelist, error_code & ec)
              idx++)
         {
             const auto mine = whitelist[idx];
-            const auto next = whitelist[idx];
+            const auto next = whitelist[idx + 1];
             if ((mine + 1) != next && (mine != next))
             {
                 ::close_range(mine + 1, next - 1, CLOSE_RANGE_UNSHARE);

test/posix_specific.cpp

@@ -16,6 +16,11 @@
 
 #include <boost/process/filesystem.hpp>
 
+#if !defined(BOOST_PROCESS_USE_STD_FS)
+#include <boost/filesystem/directory.hpp>
+#endif
+
+
 #include <system_error>
 
 

test/v2/process.cpp

@@ -625,7 +625,7 @@ BOOST_AUTO_TEST_CASE(async_request_exit)
 #endif
     );
 
-    asio::steady_timer tim{ctx, std::chrono::milliseconds(50)};
+    asio::steady_timer tim{ctx, std::chrono::milliseconds(250)};
     asio::cancellation_signal sig;
 
     bpv::async_execute(std::move(proc),