sysdeps/unix/sysv/linux/sigwait.c

   1 /* Copyright (C) 1997, 1998, 2000, 2002 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <signal.h>
  21 #define __need_NULL
  22 #include <stddef.h>
  23
  24 #include <sysdep.h>
  25 #include <sys/syscall.h>
  26 #include <bp-checks.h>
  27
  28 #ifdef __NR_rt_sigtimedwait
  29 extern int __syscall_rt_sigtimedwait (const sigset_t *__unbounded, siginfo_t *__unbounded,
  30                                       const struct timespec *__unbounded, size_t);
  31
  32
  33 /* Return any pending signal or wait for one for the given time.  */
  34 int
  35 __sigwait (set, sig)
  36      const sigset_t *set;
  37      int *sig;
  38 {
  39   siginfo_t info;
  40   int ret;
  41
  42   /* XXX The size argument hopefully will have to be changed to the
  43      real size of the user-level sigset_t.  */
  44   ret =  INLINE_SYSCALL (rt_sigtimedwait, 4, CHECK_SIGSET (set),
  45                          CHECK_1 (&info), NULL, _NSIG / 8);
  46   if (ret == 0)
  47     *sig = info.si_signo;
  48
  49   return ret;
  50 }
  51 weak_alias (__sigwait, sigwait)
  52 #else
  53 # include <sysdeps/posix/sigwait.c>
  54 #endif