[thirdparty/glibc.git] / sysdeps / unix / sysv / linux / sigwait.c

/* Copyright (C) 1997-2025 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 <signal.h>
#include <sysdep-cancel.h>
#include <errno.h>

int
__sigwait (const sigset_t *set, int *sig)
{
  siginfo_t si;
  int ret;
  do
    ret = __sigtimedwait (set, &si, NULL);
  /* Applications do not expect sigwait to return with EINTR, and the
     error code is not specified by POSIX.  */
  while (ret < 0 && errno == EINTR);
  if (ret < 0)
    return errno;
  *sig = si.si_signo;
  return 0;
}
libc_hidden_def (__sigwait)
weak_alias (__sigwait, sigwait)
strong_alias (__sigwait, __libc_sigwait)
Commit	Line	Data
	1	/* Copyright (C) 1997-2025 Free Software Foundation, Inc.
	2	This file is part of the GNU C Library.
	3
	4	The GNU C Library is free software; you can redistribute it and/or
	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the License, or (at your option) any later version.
	8
	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	Lesser General Public License for more details.
	13
	14	You should have received a copy of the GNU Lesser General Public
	15	License along with the GNU C Library; if not, see
	16	<https://www.gnu.org/licenses/>. */
	17
	18	#include <signal.h>
	19	#include <sysdep-cancel.h>
	20	#include <errno.h>
	21
	22	int
	23	__sigwait (const sigset_t set, int sig)
	24	{
	25	siginfo_t si;
	26	int ret;
	27	do
	28	ret = __sigtimedwait (set, &si, NULL);
	29	/* Applications do not expect sigwait to return with EINTR, and the
	30	error code is not specified by POSIX. */
	31	while (ret < 0 && errno == EINTR);
	32	if (ret < 0)
	33	return errno;
	34	*sig = si.si_signo;
	35	return 0;
	36	}
	37	libc_hidden_def (__sigwait)
	38	weak_alias (__sigwait, sigwait)
	39	strong_alias (__sigwait, __libc_sigwait)