Re: interrupted system call when using named pipes on FreeBSD

[Chet Ramey]

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On 1/18/13 1:30 AM, Mike Frysinger wrote:
> this is somewhat a continuation of this thread:
> http://lists.gnu.org/archive/html/bug-bash/2008-10/msg00091.html
> 
> i've gotten more or less the same report in Gentoo:
> http://bugs.gentoo.org/447810
> 
> the simple test case is:
> $ cat test.sh
> #!/bin/bash
> while :; do
>       (:)& (:)& (:)& (:)& (:)& (:)& (:)& (:)& (:)& (:)&
>       while read x ; do : ; done < <(echo foo)
> done
> 
> execute `./test.sh` and we see failures pretty much all the time.

I did some looking around, and the script does result in open returning
- -1/EINTR, even if SIGCHLD is installed with SA_RESTART, on FreeBSD and
Mac OS X.  It doesn't happen on RHEL 5.  I may test Solaris 11 later.

I did find a reference to the Linux kernel patch that makes this work:

http://marc.info/?l=linux-kernel&m=134071285509470

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/
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