diff options
Diffstat (limited to 'Lib/subprocess.py')
| -rw-r--r-- | Lib/subprocess.py | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Lib/subprocess.py b/Lib/subprocess.py index ddbca6a..2d85b50 100644 --- a/Lib/subprocess.py +++ b/Lib/subprocess.py @@ -1219,6 +1219,14 @@ class Popen(object): os.close(errread) os.close(errpipe_read) + # When duping fds, if there arises a situation + # where one of the fds is either 0, 1 or 2, it + # is possible that it is overwritten (#12607). + if c2pwrite == 0: + c2pwrite = os.dup(c2pwrite) + if errwrite == 0 or errwrite == 1: + errwrite = os.dup(errwrite) + # Dup fds for child def _dup2(a, b): # dup2() removes the CLOEXEC flag but |