I need to chain together three linux commands and get the final output. I read the documentation for Popen in the subprocess module for replacing the shell pipe line. I followed the example and keep getting a 0 where I should be getting a 1.
I am trying to do this: grep "Sep 22" /var/log/auth.log | grep "Illegal user" | wc -l which returns a 1 when I run this manually. This is what I did with python: p1 = Popen(['grep', '"Sep 22"', '/var/log/auth.log'], stdout=PIPE) p2 = Popen(['grep', '"Illegal user"'], stdin=p1.stdout, stdout=PIPE) p3 = Popen(['wc', '-l'], stdin=p2.stdout, stdout=PIPE) print p3.stdout.read() which always prints a 0. What am I doing wrong? Thanks, Tom -- http://mail.python.org/mailman/listinfo/python-list
