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/* Copyright (C) 1991-2015 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
<http://www.gnu.org/licenses/>. */
#define sigpause __rename_sigpause
#include <errno.h>
#include <signal.h>
#include <stddef.h> /* For NULL. */
#include <sysdep-cancel.h>
#undef sigpause
#include <sigset-cvt-mask.h>
/* Set the mask of blocked signals to MASK,
wait for a signal to arrive, and then restore the mask. */
static int
do_sigpause (int sig_or_mask, int is_sig)
{
sigset_t set;
if (is_sig != 0)
{
/* The modern X/Open implementation is requested. */
if (__sigprocmask (0, NULL, &set) < 0
|| sigdelset (&set, sig_or_mask) < 0)
return -1;
}
else if (sigset_set_old_mask (&set, sig_or_mask) < 0)
return -1;
/* Note the sigpause() is a cancellation point. But since we call
sigsuspend() which itself is a cancellation point we do not have
to do anything here. */
return __sigsuspend (&set);
}
int
__sigpause (int sig_or_mask, int is_sig)
{
if (SINGLE_THREAD_P)
return do_sigpause (sig_or_mask, is_sig);
int oldtype = LIBC_CANCEL_ASYNC ();
int result = do_sigpause (sig_or_mask, is_sig);
LIBC_CANCEL_RESET (oldtype);
return result;
}
libc_hidden_def (__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
__attribute__ ((weak))
__default_sigpause (int mask)
{
return __sigpause (mask, 0);
}
#undef sigpause
weak_alias (__default_sigpause, sigpause)
strong_alias (__default_sigpause, __libc_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
__attribute__ ((weak))
__xpg_sigpause (int sig)
{
return __sigpause (sig, 1);
}
strong_alias (__xpg_sigpause, __libc___xpg_sigpause)
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