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Re: background, pipeline, hang

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  Re: background, pipeline, hang Chet Ramey <chet.ramey@case.edu> - 2019-07-14 17:06 -0400

#15168 — Re: background, pipeline, hang

On 7/13/19 5:55 AM, Mike Jonkmans wrote:

> This runs for two seconds:
> 	bash --norc --noprofile -ic "trap 'tput hs' DEBUG; sleep 2 & :|:|:"
> 
> While this immediately finishes:
> 	bash --norc --noprofile -ic "trap ':' DEBUG; sleep 2 & :|:|:"

I believe this has to do with running a process that forks from the DEBUG
trap while executing a pipeline.

Just another reason executing a DEBUG trap for a simple command that's run
as part of a pipeline is a bad idea.

This looks like a Linux-only problem, so I'll look when I have better
access to a Linux machine.

Chet

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

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