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/* Copyright (C) 1991, 92, 1994-1998, 2000 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <signal.h>
#include <stddef.h> /* For NULL. */
/* Set the mask of blocked signals to MASK,
wait for a signal to arrive, and then restore the mask. */
int
__sigpause (int sig_or_mask, int is_sig)
{
sigset_t set;
int sig;
if (is_sig != 0)
{
/* The modern X/Open implementation is requested. */
if (__sigprocmask (0, NULL, &set) < 0
/* Yes, we call `sigdelset' and not `__sigdelset'. */
|| __sigdelset (&set, sig_or_mask) < 0)
return -1;
}
else
{
if (__sigemptyset (&set) < 0)
return -1;
if (sizeof (sig_or_mask) == sizeof (set))
*(int *) &set = sig_or_mask;
else if (sizeof (unsigned long int) == sizeof (set))
*(unsigned long int *) &set = (unsigned int) sig_or_mask;
else
for (sig = 1; sig < NSIG; ++sig)
if ((sig_or_mask & sigmask (sig)) && __sigaddset (&set, sig) < 0)
return -1;
}
return __sigsuspend (&set);
}
/* We have to provide a default version of this function since the
standards demand it. The version which is a bit more reasonable is
the BSD version. So make this the default. */
int
__default_sigpause (int mask)
{
return __sigpause (mask, 0);
}
#undef sigpause
weak_alias (__default_sigpause, sigpause)
/* We have to provide a default version of this function since the
standards demand it. The version which is a bit more reasonable is
the BSD version. So make this the default. */
int
__xpg_sigpause (int sig)
{
return __sigpause (sig, 1);
}
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