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signal-safety.7: Note glibc deviations from POSIX requirements 

See https://bugzilla.kernel.org/show_bug.cgi?id=25292

Reported-by: KASAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2016-11-09 13:42:37 +01:00
parent d1329af1f3
commit fb16ec3585
1 changed files with 21 additions and 0 deletions
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man7/signal-safety.7
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@ -301,6 +301,27 @@ or
.BR siglongjmp (3)
and the program subsequently calls an unsafe function,
then the behavior of the program is undefined.
.\"
.SS Deviations in the GNU C library
The following known deviations from the standard occur in
the GNU C library:
.IP * 3
Before glibc 2.24,
.BR execl (3)
and
.BR execle (3)
employed
.BR realloc (3)
internally and were consequently not async-signal-safe.
.\" https://sourceware.org/bugzilla/show_bug.cgi?id=19534
This was fixed in glibc 2.24.
.IP *
.\" FIXME . https://sourceware.org/bugzilla/show_bug.cgi?id=13172
The glibc implementation of
.BR aio_suspend (3)
is not async-signal-safe because it uses
.BR pthread_mutex_lock (3)
internally.
.SH SEE ALSO
.BR sigaction (2),
.BR signal (7),