Peter Rosin skrev 2011-09-28 17:26: > Hi! > > When I use bash to build pipelines, they sometimes don't finish but > instead some process remains running. Example: > > $ tail -f -n 10000 log.txt | grep . | head -n 2 > > Almost instantly I get the expected two lines of output, but no prompt > back. I have to use ctrl-c. If I don't ctrl-c I can run pstree in > another terminal and see this: > > $ pstree > ?─┬─mintty───bash───tail > └─mintty───bash───pstree
This example is a poor one, as tail simply waits for a new line, when it gets a new line it forwards it to the pipe and promptly receives a SIGPIPE as grep is not there anymore. I'll get back when I have distilled a better STC. If I can... Cheers, Peter -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
