[New-bugs-announce] [issue10635] Calling subprocess.Popen with preexec_fn=signal.pause blocks forever
report at bugs.python.org
Mon Dec 6 01:05:25 CET 2010
New submission from joseph.h.garvin <joseph.h.garvin at gmail.com>:
The following code will cause the interpreter to hang:
Replace "/bin/echo" with any valid program on your box, it's just the simplest Linux example. It's expected for signal.pause to block, but the documentation for Popen says that preexec_fn will be run in the /child/ process, so it shouldn't cause the interpreter running this code to block.
I'm going to guess Popen is using signals for some reason internally and signal.pause interferes with it. It's probably worth making sure that signals related functions work with preexec_fn in general.
components: Library (Lib)
title: Calling subprocess.Popen with preexec_fn=signal.pause blocks forever
versions: Python 2.6
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