From 8095b6548b3b0e69fc24574ca56ac8654495f4ec Mon Sep 17 00:00:00 2001 From: "Gregory P. Smith" Date: Sat, 5 Feb 2011 21:51:27 +0000 Subject: Merged revisions 88352 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/py3k ........ r88352 | gregory.p.smith | 2011-02-05 13:47:25 -0800 (Sat, 05 Feb 2011) | 3 lines issue7678 - Properly document how to replace a shell pipeline so that SIGPIPE happens when the end exits before the beginning. ........ --- Doc/library/subprocess.rst | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst index c490203..e333309 100644 --- a/Doc/library/subprocess.rst +++ b/Doc/library/subprocess.rst @@ -465,8 +465,11 @@ Replacing shell pipeline ==> p1 = Popen(["dmesg"], stdout=PIPE) p2 = Popen(["grep", "hda"], stdin=p1.stdout, stdout=PIPE) + p1.stdout.close() # Allow p1 to receive a SIGPIPE if p2 exits. output = p2.communicate()[0] +The p1.stdout.close() call after starting the p2 is important in order for p1 +to receive a SIGPIPE if p2 exits before p1. Replacing :func:`os.system` ^^^^^^^^^^^^^^^^^^^^^^^^^^^ -- cgit v0.12