Currently, the preexec_fn is executed after the file descriptors are closed. This has some unwanted effects:
The proposal is to move the "close the fds" section below the "execute the preexec_fn" code: https://github.com/pexpect/ptyprocess/blob/master/ptyprocess/ptyprocess.py#L266-L285
For reference, this is what it does subprocess.Popen: https://github.com/python/cpython/blob/master/Modules/_posixsubprocess.c#L528-L549
If it is okay, I can do a PR with the fix but I would like to hear your opinions about this.
Currently, the
preexec_fnis executed after the file descriptors are closed. This has some unwanted effects:preexec_fnopens a file descriptor, it will be inherit by the child processpreexec_fnrelays on having some file descriptor open, it will crash (see Please allow calling preexec_fn before closing file descriptors, not after. pexpect#368)The proposal is to move the "close the fds" section below the "execute the preexec_fn" code: https://github.com/pexpect/ptyprocess/blob/master/ptyprocess/ptyprocess.py#L266-L285
For reference, this is what it does
subprocess.Popen: https://github.com/python/cpython/blob/master/Modules/_posixsubprocess.c#L528-L549If it is okay, I can do a PR with the fix but I would like to hear your opinions about this.