Bugs item #1068268, was opened at 2004-11-18 05:07 Message generated for change (Comment added) made by mattjohnston You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1068268&group_id=5470
Category: Python Library Group: Python 2.4 Status: Open Resolution: None Priority: 3 Submitted By: Peter Åstrand (astrand) Assigned to: Peter Åstrand (astrand) Summary: subprocess is not EINTR-safe Initial Comment: The subprocess module is not safe for use with signals, because it doesn't retry the system calls upon EINTR. However, as far as I understand it, this is true for most other Python modules as well, so it isn't obvious that the subprocess needs to be fixed. The problem was first noticed by John P Speno. ---------------------------------------------------------------------- Comment By: Matt Johnston (mattjohnston) Date: 2004-12-22 15:07 Message: Logged In: YES user_id=785805 I've hit this on a Solaris 9 box without explicitly using signals. Using the DCOracle module, a seperate Oracle process is executed. When this terminates, a SIGCHLD is sent to the calling python process, which may be in the middle of a select() in the communicate() call, causing EINTR. From the output of truss (like strace), a sigchld handler doesn't appear to be getting explicitly installed by the Oracle module. SunOS 5.9 Generic_112233-01 sun4u sparc SUNW,Sun-Fire-280R ---------------------------------------------------------------------- Comment By: Peter Åstrand (astrand) Date: 2004-11-18 05:15 Message: Logged In: YES user_id=344921 One way of testing subprocess for signal-safeness is to insert these lines just after _cleanup(): import signal signal.signal(signal.SIGALRM, lambda x,y: 1) signal.alarm(1) import time time.sleep(0.99) Then run test_subprocess.py. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1068268&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
