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Date: Tue, 04 Oct 2011 16:00:13 +0200
From: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
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Subject: Re: 1.7.9 Missing SIGPIPE?
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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
>> ?─┬─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

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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