sysdeps/unix/sysv/linux/x86_64/sigprocmask.c

   1 /* Copyright (C) 1997-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Written by Jes Sorensen, <Jes.Sorensen@cern.ch>, April 1999.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 /* Linux/x86_64 only has rt signals, thus we do not even want to try falling
  20    back to the old style signals as the default Linux handler does. */
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <unistd.h>
  25
  26 #include <sysdep.h>
  27 #include <sys/syscall.h>
  28
  29 /* Get and/or change the set of blocked signals.  */
  30 int
  31 __sigprocmask (int how, const sigset_t *set, sigset_t *oset)
  32 {
  33
  34   /* XXX The size argument hopefully will have to be changed to the
  35      real size of the user-level sigset_t.  */
  36   return INLINE_SYSCALL (rt_sigprocmask, 4, how, set, oset, _NSIG / 8);
  37 }
  38 libc_hidden_def (__sigprocmask)
  39 weak_alias (__sigprocmask, sigprocmask)