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From: Matthew Lefavor <mclefavor@gmail.com>
Date: Thu, 18 Jul 2013 14:44:36 -0400
Subject: KeyboardInterrupt in Subproccesses
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All:

I am maintaining a program in Python 2 and need to send it a
KeyboardInterrupt to close it. Unfortunately, the program is used as a
subprocess in a wrapper subprocess, and so I cannot just directly press
CTL-C; I have to use a signal.

When I run the program "bare" (not in a subprocess), I have found that
raising a SIGINT (kill -2) raises a KeyboardInterrupt in the program. But
when I run the program in the wrapper process, kill -2 no longer has any
effect (whether it is raised by the wrapper or externally).

Why is that the case? Does Python's interpretation of SIGINT as a
KeyboardInterrupt only obtain when the program is run in a terminal? Is
there something else I'm missing?

Bonus points: Is this behavior the same for Python 3?

MCL

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<div dir=3D"ltr"><div>All:</div><div><br></div><div>I am maintaining a prog=
ram in Python 2 and need to send it a KeyboardInterrupt to close it. Unfort=
unately, the program is used as a subprocess in a wrapper subprocess, and s=
o I cannot just directly press CTL-C; I have to use a signal.</div>

<div><br></div><div>When I run the program &quot;bare&quot; (not in a subpr=
ocess), I have found that raising a SIGINT (kill -2) raises a KeyboardInter=
rupt in the program. But when I run the program in the wrapper process, kil=
l -2 no longer has any effect (whether it is raised by the wrapper or exter=
nally).</div>

<div><br></div><div>Why is that the case? Does Python&#39;s interpretation =
of SIGINT as a KeyboardInterrupt only obtain when the program is run in a t=
erminal? Is there something else I&#39;m missing?</div><div><br></div>
<div>
Bonus points: Is this behavior the same for Python 3?</div><br clear=3D"all=
"><div><div>MCL</div></div>
</div>

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