bpo-35537: subprocess can now use os.posix_spawnp (GH-11579)

The subprocess module can now use the os.posix_spawnp() function,
if it is available, to locate the program in the PATH.

1 files changed, 10 insertions, 3 deletions

diff --git a/Lib/subprocess.py b/Lib/subprocess.py
index b94575b..d63cf20 100644
--- a/Lib/subprocess.py
+++ b/Lib/subprocess.py
@@ -655,6 +655,7 @@ def _use_posix_spawn():
 
 
 _USE_POSIX_SPAWN = _use_posix_spawn()
+_HAVE_POSIX_SPAWNP = hasattr(os, 'posix_spawnp')
 
 
 class Popen(object):
@@ -1442,7 +1443,10 @@ class Popen(object):
 
 
         def _posix_spawn(self, args, executable, env, restore_signals):
-            """Execute program using os.posix_spawn()."""
+            """Execute program using os.posix_spawnp().
+
+            Or use os.posix_spawn() if os.posix_spawnp() is not available.
+            """
             if env is None:
                 env = os.environ
 
@@ -1456,7 +1460,10 @@ class Popen(object):
                         sigset.append(signum)
                 kwargs['setsigdef'] = sigset
 
-            self.pid = os.posix_spawn(executable, args, env, **kwargs)
+            if _HAVE_POSIX_SPAWNP:
+                self.pid = os.posix_spawnp(executable, args, env, **kwargs)
+            else:
+                self.pid = os.posix_spawn(executable, args, env, **kwargs)
 
         def _execute_child(self, args, executable, preexec_fn, close_fds,
                            pass_fds, cwd, env,
@@ -1484,7 +1491,7 @@ class Popen(object):
                 executable = args[0]
 
             if (_USE_POSIX_SPAWN
-                    and os.path.dirname(executable)
+                    and (_HAVE_POSIX_SPAWNP or os.path.dirname(executable))
                     and preexec_fn is None
                     and not close_fds
                     and not pass_fds