[Python-bugs-list] [ python-Bugs-597795 ] spawn*() doesn't handle errors well

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Bugs item #597795, was opened at 2002-08-20 11:36
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Category: Python Library
Group: Python 2.2.1
>Status: Closed
>Resolution: Invalid
Priority: 5
Submitted By: Jim Hickey (gohickey)
>Assigned to: Guido van Rossum (gvanrossum)
Summary: spawn*() doesn't handle errors well

Initial Comment:
spawn*() routines are supposed to return the child's pid, 
but if an error occurs (such as bad parameters, etc.), it 
returns 127.  This "looks" like a valid pid, so the caller 
has no way of knowing if something when wrong.  
Throwing an exception would be much more 
informational (and python-esque).

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>Comment By: Guido van Rossum (gvanrossum)
Date: 2002-09-03 15:23

Message:
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There's nothing that can be done about this. These errors
are detected in the child process; the child process cannot
cause an exception to be raised in the parent. _exit(127) is
what the C library's system() function does in this case.

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