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‘system*’ no longer changes SIGINT and SIGQUIT handlers.

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Fixes <https://bugs.gnu.org/70144>.

Fixes a bug whereby ‘system*’ would change the handler of SIGINT and
SIGQUIT to SIG_IGN in a racy fashion, possibly competing with calls to
‘sigaction’ in Scheme in another thread.

This is a followup to 527c257d6e, which
witch to ‘posix_spawn’, ensuring signals are properly dealt with when
creating child processes.

* libguile/posix.c (restore_sigaction, scm_dynwind_sigaction): Remove.
(scm_system_star): Remove sigaction dynwind around call to
‘piped_process’.
* NEWS: Update.

Reported-by: Christopher Baines <mail@cbaines.net>
This commit is contained in:
Ludovic Courtès 2024-05-06 11:07:42 +02:00
parent 3b76a30e3c
commit 4ae33f76d6
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2 changed files with 5 additions and 35 deletions
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@ -62,6 +62,8 @@ files. See "Random Access" in the manual for details.
** 'make-custom-port' now honors its #:conversion-strategy argument
** 'eval-string' respects #:column (previously it was set to the #:line)
** 'string->date' now allows a colon in the ISO 8601 zone offset
** 'system*' no longer fiddles with the process' signal handlers
(<https://bugs.gnu.org/70144>)
** Hashing of UTF-8 symbols with non-ASCII characters avoids corruption
(<https://bugs.gnu.org/56413>)