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| From | Chet Ramey <chet.ramey@case.edu> |
| Newsgroups | gnu.bash.bug |
| Subject | Re: signals ignored in a subshell |
| Date | Mon, 6 Apr 2020 09:24:27 -0400 |
| Organization | ITS, Case Western Reserve University |
| Lines | 34 |
| Approved | bug-bash@gnu.org |
| Message-ID | <mailman.246.1586179477.2644.bug-bash@gnu.org> (permalink) |
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| Cc | chet.ramey@case.edu, Robert Elz <kre@munnari.oz.au>, "bug-bash@gnu.org" <bug-bash@gnu.org> |
| To | Oğuz <oguzismailuysal@gmail.com> |
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On 4/6/20 8:03 AM, Oğuz wrote: > Okay, you're right, in posix mode the behavior is as expected. However I > still didn't get why job controls being enabled/disabled changes the way an > interactive shell handles signals in posix mode. Like > > $ set -o posix > $ > $ trap 'echo foo' INT > $ > $ read > ^Cfoo > $ sleep 5 > ^C > $ > $ set +m > $ > $ read > ^Cfoo > $ sleep 5 > ^Cfoo > > Is there a race condition here or does posix mandate this behavior for > built-in utilities? When job control is enabled, commands are run in separate process groups, and those process groups get terminal-generated signals like SIGINT. The shell never sees them. -- ``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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Re: signals ignored in a subshell Chet Ramey <chet.ramey@case.edu> - 2020-04-06 09:24 -0400
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