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/* Copyright (C) 1991 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <errno.h>
#include <signal.h>
#include <stddef.h>
#include <unistd.h>
/* Change the set of blocked signals to SET,
wait until a signal arrives, and restore the set of blocked signals. */
int
DEFUN(sigsuspend, (set), CONST sigset_t *set)
{
sigset_t oset;
int save;
if (set == NULL)
{
errno = EINVAL;
return -1;
}
if (sigprocmask(SIG_SETMASK, set, &oset) < 0)
return -1;
(void) pause();
save = errno;
if (sigprocmask(SIG_SETMASK, &oset, (sigset_t *) NULL) < 0)
return -1;
errno = save;
return -1;
}
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