Gregory P. Smith added the comment:
A side effect of the changes made within are that getstatusoutput() on POSIX
systems now returns a different value for status.
The old implementation present in Python 2 and Python 3.3 before this patch
returned the raw waitpid() status result as the status value. ie:
getstatusoutput("exit 1")[0] == 256. the lower 8 bits were reserved for the
signal number the process died with, if any.
Now it returns the sanitized subprocess style returncode: positive numbers are
the process exit code (so the above example returns 1) and negative numbers are
the negative signal number the process died with.
I prefer the new behavior, but this API change is not documented anywhere that
I can find.
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<http://bugs.python.org/issue10197>
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