/* pause -- suspend the process until a signal arrives.  POSIX.1 version.

   Copyright (C) 2003-2018 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/>.  */

#include <signal.h>

#include <unistd.h>

#include <sysdep-cancel.h>

#include <sigsetops.h>

/* Suspend the process until a signal arrives.

   This always returns -1 and sets errno to EINTR.  */

int

__libc_pause (void)

{

  sigset_t set;

  __sigemptyset (&set);

  __sigprocmask (SIG_BLOCK, NULL, &set);

  /* pause is a cancellation point, but so is sigsuspend.

     So no need for anything special here.  */

  return __sigsuspend (&set);

}

weak_alias (__libc_pause, pause)

LIBC_CANCEL_HANDLED ();		/* sigsuspend handles our cancellation.  */