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Re: Obscure issue with process substitution since bash-5.0.016 upgrade


From: Chet Ramey
Subject: Re: Obscure issue with process substitution since bash-5.0.016 upgrade
Date: Thu, 2 Apr 2020 17:19:55 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.5.0

On 4/1/20 10:15 PM, Joan Bruguera Micó wrote:
> I'm having a problem with a script that used to work, which I reduced
> to the following test case:
> 
>     #!/bin/bash
> 
>     function docat() {
>         for x in 1 2 3 ; do true; done
>         cat "$@"
>     }
> 
>     for x in $(seq 25); do
>         docat <(echo a) <(echo a) <(echo a) <(echo a) <(echo a) <(echo a)
>     done
> 
> Expected behaviour: A lot of lines with an "a" are printed

Thanks for the report.

Yes, this is a problem, as you discovered, with bash-5.0 patch 16. There is
a better way to solve the problem that patch attempts to solve, and the
enclosed patch to bash-5.0.16 does it.

Chet

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    address@hidden    http://tiswww.cwru.edu/~chet/

Attachment: close-new-fifos.patch
Description: Text document


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