nptl/sigaction.c

   1 /* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20
  21 /* This is no complete implementation.  The file is meant to be
  22    included in the real implementation to provide the wrapper around
  23    __libc_sigaction.  */
  24
  25 #include <nptl/pthreadP.h>
  26
  27 /* We use the libc implementation but we tell it to not allow
  28    SIGCANCEL or SIGTIMER to be handled.  */
  29 #define LIBC_SIGACTION  1
  30
  31
  32 int
  33 __sigaction (sig, act, oact)
  34      int sig;
  35      const struct sigaction *act;
  36      struct sigaction *oact;
  37 {
  38   if (__builtin_expect (sig == SIGCANCEL || sig == SIGSETXID, 0))
  39     {
  40       __set_errno (EINVAL);
  41       return -1;
  42     }
  43
  44   return __libc_sigaction (sig, act, oact);
  45 }
  46 libc_hidden_weak (__sigaction)
  47 weak_alias (__sigaction, sigaction)