glibc/sysdeps/posix/sysv_signal.c
Paul Eggert 2b778ceb40 Update copyright dates with scripts/update-copyrights
I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
2021-01-02 12:17:34 -08:00

59 lines
1.7 KiB
C

/* Copyright (C) 1991-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <signal.h>
#include <string.h> /* For the real memset prototype. */
#include <sigsetops.h>
/* Tolerate non-threads versions of Posix */
#ifndef SA_ONESHOT
#define SA_ONESHOT 0
#endif
#ifndef SA_NOMASK
#define SA_NOMASK 0
#endif
#ifndef SA_INTERRUPT
#define SA_INTERRUPT 0
#endif
/* Set the handler for the signal SIG to HANDLER,
returning the old handler, or SIG_ERR on error. */
__sighandler_t
__sysv_signal (int sig, __sighandler_t handler)
{
struct sigaction act, oact;
/* Check signal extents to protect __sigismember. */
if (handler == SIG_ERR || sig < 1 || sig >= NSIG)
{
__set_errno (EINVAL);
return SIG_ERR;
}
act.sa_handler = handler;
__sigemptyset (&act.sa_mask);
act.sa_flags = SA_ONESHOT | SA_NOMASK | SA_INTERRUPT;
act.sa_flags &= ~SA_RESTART;
if (__sigaction (sig, &act, &oact) < 0)
return SIG_ERR;
return oact.sa_handler;
}
weak_alias (__sysv_signal, sysv_signal)