[Octave-bug-tracker] [bug #49525] popen2 segfaults if command doesn't exist

[Mike Miller]

Update of bug #49525 (project octave):

                  Status:                    None => Patch Submitted        

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Follow-up Comment #4:

Thanks, marking as working patch submitted.

Returning a failure indicating that the child process couldn't start seems
like it's almost an unsolvable problem to me. Maybe we could open a third pipe
between the parent and the child, set the close-on-exec flag, and use it to
send a failure message back to Octave if exec()ing the child process fails?

Since the user who calls popen2 is expected to communicate with the child and
use waitpid to check status / reap the child anyway, this seems like a
separate feature request, but I think this bug can be closed with the simple
change from exit to _exit (and I chose 127 because that's what bash returns
for command not found).

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