sysdeps/unix/sysv/linux/sigwait.c

   1 /* Copyright (C) 1997-2017 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #include <signal.h>
  19 #include <sysdep-cancel.h>
  20
  21 int
  22 __sigwait (const sigset_t *set, int *sig)
  23 {
  24   siginfo_t si;
  25   if (__sigtimedwait (set, &si, 0) < 0)
  26     return -1;
  27   *sig = si.si_signo;
  28   return 0;
  29 }
  30 libc_hidden_def (__sigwait)
  31 weak_alias (__sigwait, sigwait)
  32 strong_alias (__sigwait, __libc_sigwait)
  33
  34 /* __sigtimedwait handles cancellation.  */
  35 LIBC_CANCEL_HANDLED ();