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Re: 1.7.9 Missing SIGPIPE?


On 10/4/2011 3:53 PM, Peter Rosin wrote:
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
?âââminttyâââbashâââtail
   ââminttyâââbashâââpstree

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

Hi Peter, are you referring on something like SIGHUP on PTY closure ?

http://cygwin.com/ml/cygwin/2011-07/msg00295.html
http://pubs.opengroup.org/onlinepubs/9699919799/functions/close.html

Regards
Marco

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