Re: Named fifo's causing hanging bash scripts

[Chet Ramey]

On 1/12/15 9:55 AM, werner@linux-8jdz.site wrote:

> Bash Version: 4.3
> Patch Level: 33
> Release Status: release
> 
> Description:
>         Named fifo's causing hanging bash scripts like
> 
>         while IFS="|" read a b c ; do
>           [shell code]
>         done < <(shell code)
> 
>         can cause random hangs of the bash.    An strace shows that the bash
>         stays in wait4()

I can't reproduce this.  I spun up a VM running OpenSUSE 13 and ran the
attached script against a version of bash-4.3.33 that was modified to use
FIFOs instead of /dev/fd.  There were no hangs in any of about 30 runs.

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/