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Re: Bad file descriptor with coproc and pipe
From: |
Chet Ramey |
Subject: |
Re: Bad file descriptor with coproc and pipe |
Date: |
Thu, 06 Feb 2014 14:22:17 -0500 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:24.0) Gecko/20100101 Thunderbird/24.1.1 |
On 2/5/14 4:37 PM, Michal Sojka wrote:
>> Bash closes file descriptors associated with coprocs in child processes,
>> since they are pipes. It's even more careful when those child processes
>> are part of pipelines. It's really a bad idea to have pipe file
>> descriptors open in multiple processes; that prevents SIGPIPE generation
>> and EOF on read when one writer exits.
>
> Thanks for the explanation. Then the bug is that it is not documented:
> https://www.gnu.org/software/bash/manual/bashref.html#Coprocesses
Thanks; this is already in the bash-4.3 version of the manual(s).
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU chet@case.edu http://cnswww.cns.cwru.edu/~chet/