sysdeps/unix/sysv/linux/sigsuspend.c

   1 /* Copyright (C) 1996, 1997 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <signal.h>
  20 #include <stddef.h>
  21 #include <unistd.h>
  22
  23 extern int __syscall_sigsuspend (int, unsigned long int, unsigned long int);
  24
  25 /* Change the set of blocked signals to SET,
  26    wait until a signal arrives, and restore the set of blocked signals.  */
  27 int
  28 __sigsuspend (set)
  29      const sigset_t *set;
  30 {
  31   /* XXX This will have to be changed once the kernel knows about
  32      larger sigsets.  */
  33   unsigned long int word = set->__val[0];
  34
  35   return __syscall_sigsuspend (0, 0, word);
  36 }
  37 weak_alias (__sigsuspend, sigsuspend)