From: Vincent Lefevre <vincent@vinc17.net>
To: zsh-workers@zsh.org
Subject: [BUG] ignored trap and subshell
Date: Tue, 24 Aug 2021 18:23:30 +0200 [thread overview]
Message-ID: <20210824162330.GA3017045@cventin.lip.ens-lyon.fr> (raw)
The zshmisc(1) man page says:
( list )
Execute list in a subshell. Traps set by the trap builtin are
reset to their default values while executing list.
However, with "emulate sh", ignored traps should still be ignored
in the subshell according to POSIX, and zsh 5.8 fails do conform:
$ zsh -c 'emulate sh; trap "" INT; trap; echo A; ( trap; echo B; sleep 3; ); echo $?'
trap -- '' INT
A
B
^C130
where Ctrl-C immediately interrupts the sleep.
Compare to sh:
$ sh -c 'trap "" INT; trap; echo A; ( trap; echo B; sleep 3; ); echo $?'
trap -- '' INT
A
trap -- '' INT
B
^C0
where the sleep isn't interrupted by Ctrl-C.
--
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
next reply other threads:[~2021-08-24 16:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-24 16:23 Vincent Lefevre [this message]
2021-08-24 17:29 ` Bart Schaefer
2021-08-24 17:33 ` Bart Schaefer
2021-08-25 10:10 ` Peter Stephenson
2021-08-25 10:47 ` Peter Stephenson
2021-08-25 16:07 ` Bart Schaefer
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