sysdeps/posix/sigblock.c

   1 /* Copyright (C) 1991-2017 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 <errno.h>
  19 #include <signal.h>
  20
  21 #include <sigset-cvt-mask.h>
  22
  23 /* Block signals in MASK, returning the old mask.  */
  24 int
  25 __sigblock (int mask)
  26 {
  27   sigset_t set, oset;
  28
  29   if (sigset_set_old_mask (&set, mask) < 0)
  30     return -1;
  31
  32   if (__sigprocmask (SIG_BLOCK, &set, &oset) < 0)
  33     return -1;
  34
  35   return sigset_get_old_mask (&oset);
  36 }
  37
  38 libc_hidden_def (__sigblock)
  39 weak_alias (__sigblock, sigblock)