sysdeps/stub/sigprocmask.c

   1 /* Copyright (C) 1991, 1995 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <errno.h>
  21 #include <signal.h>
  22
  23
  24 /* If SET is not NULL, modify the current set of blocked signals
  25    according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK.
  26    If OSET is not NULL, store the old set of blocked signals in *OSET.  */
  27 int
  28 DEFUN(__sigprocmask, (how, set, oset),
  29       int how AND CONST sigset_t *set AND sigset_t *oset)
  30 {
  31   switch (how)
  32     {
  33     case SIG_BLOCK:
  34     case SIG_UNBLOCK:
  35     case SIG_SETMASK:
  36       break;
  37     default:
  38       errno = EINVAL;
  39       return -1;
  40     }
  41
  42   errno = ENOSYS;
  43   return -1;
  44 }
  45
  46 /* No stub warning because abort calls __sigprocmask,
  47    and we don't want warnings for every use of abort on
  48    a system without safe signals.  */
  49
  50 weak_alias (__sigprocmask, sigprocmask)