Re: DEBUG trap in a background shell steals controlling terminal forcing parent shell to exit

[Chet Ramey]

On 6/18/24 4:55 PM, Mark March wrote:
> I am working with a large Bash code base where most scripts disable job control 
> and the DEBUG trap is used extensively. I noticed that if I tried to run my 
> scripts in the background, the interactive shell that started them would 
> immediately exit on any keyboard input. A simple repro is to run
>
> bash +m -c "/bin/echo ; trap 'trap DEBUG' DEBUG ; sleep 10" &
> in an interactive shell with job control enabled. Hit Enter a few times. The 
> shell that launched this background process exits. The background process 
> itself appears to be killed by a signal.

Thanks for the report. The attached patch should fix your issue, though
there might be some corner cases. Let me know.

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/

debug-trap-tprgp.patch
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