diff options
Diffstat (limited to 'Lib/subprocess.py')
| -rw-r--r-- | Lib/subprocess.py | 58 |
1 files changed, 40 insertions, 18 deletions
diff --git a/Lib/subprocess.py b/Lib/subprocess.py index 759b59f1..e9c9a0e 100644 --- a/Lib/subprocess.py +++ b/Lib/subprocess.py @@ -593,14 +593,30 @@ class Popen(object): c2pread, c2pwrite, errread, errwrite) - if p2cwrite: + # On Windows, you cannot just redirect one or two handles: You + # either have to redirect all three or none. If the subprocess + # user has only redirected one or two handles, we are + # automatically creating PIPEs for the rest. We should close + # these after the process is started. See bug #1124861. + if mswindows: + if stdin is None and p2cwrite is not None: + os.close(p2cwrite) + p2cwrite = None + if stdout is None and c2pread is not None: + os.close(c2pread) + c2pread = None + if stderr is None and errread is not None: + os.close(errread) + errread = None + + if p2cwrite is not None: self.stdin = os.fdopen(p2cwrite, 'wb', bufsize) - if c2pread: + if c2pread is not None: if universal_newlines: self.stdout = os.fdopen(c2pread, 'rU', bufsize) else: self.stdout = os.fdopen(c2pread, 'rb', bufsize) - if errread: + if errread is not None: if universal_newlines: self.stderr = os.fdopen(errread, 'rU', bufsize) else: @@ -669,7 +685,9 @@ class Popen(object): if stdin is None: p2cread = GetStdHandle(STD_INPUT_HANDLE) - elif stdin == PIPE: + if p2cread is not None: + pass + elif stdin is None or stdin == PIPE: p2cread, p2cwrite = CreatePipe(None, 0) # Detach and turn into fd p2cwrite = p2cwrite.Detach() @@ -683,7 +701,9 @@ class Popen(object): if stdout is None: c2pwrite = GetStdHandle(STD_OUTPUT_HANDLE) - elif stdout == PIPE: + if c2pwrite is not None: + pass + elif stdout is None or stdout == PIPE: c2pread, c2pwrite = CreatePipe(None, 0) # Detach and turn into fd c2pread = c2pread.Detach() @@ -697,7 +717,9 @@ class Popen(object): if stderr is None: errwrite = GetStdHandle(STD_ERROR_HANDLE) - elif stderr == PIPE: + if errwrite is not None: + pass + elif stderr is None or stderr == PIPE: errread, errwrite = CreatePipe(None, 0) # Detach and turn into fd errread = errread.Detach() @@ -987,29 +1009,29 @@ class Popen(object): # Child try: # Close parent's pipe ends - if p2cwrite: + if p2cwrite is not None: os.close(p2cwrite) - if c2pread: + if c2pread is not None: os.close(c2pread) - if errread: + if errread is not None: os.close(errread) os.close(errpipe_read) # Dup fds for child - if p2cread: + if p2cread is not None: os.dup2(p2cread, 0) - if c2pwrite: + if c2pwrite is not None: os.dup2(c2pwrite, 1) - if errwrite: + if errwrite is not None: os.dup2(errwrite, 2) # Close pipe fds. Make sure we don't close the same # fd more than once, or standard fds. - if p2cread and p2cread not in (0,): + if p2cread is not None and p2cread not in (0,): os.close(p2cread) - if c2pwrite and c2pwrite not in (p2cread, 1): + if c2pwrite is not None and c2pwrite not in (p2cread, 1): os.close(c2pwrite) - if errwrite and errwrite not in (p2cread, c2pwrite, 2): + if errwrite is not None and errwrite not in (p2cread, c2pwrite, 2): os.close(errwrite) # Close all other fds, if asked for @@ -1042,11 +1064,11 @@ class Popen(object): # Parent os.close(errpipe_write) - if p2cread and p2cwrite: + if p2cread is not None and p2cwrite is not None: os.close(p2cread) - if c2pwrite and c2pread: + if c2pwrite is not None and c2pread is not None: os.close(c2pwrite) - if errwrite and errread: + if errwrite is not None and errread is not None: os.close(errwrite) # Wait for exec to fail or succeed; possibly raising exception |