glibc/signal/sigprocmask.c

/* Copyright (C) 1991, 1995, 1996, 1997 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <errno.h>
#include <signal.h>


/* If SET is not NULL, modify the current set of blocked signals
   according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK.
   If OSET is not NULL, store the old set of blocked signals in *OSET.  */
int
__sigprocmask (how, set, oset)
     int how;
     const sigset_t *set;
     sigset_t *oset;
{
  switch (how)
    {
    case SIG_BLOCK:
    case SIG_UNBLOCK:
    case SIG_SETMASK:
      break;
    default:
      __set_errno (EINVAL);
      return -1;
    }

  __set_errno (ENOSYS);
  return -1;
}

/* No stub warning because abort calls __sigprocmask,
   and we don't want warnings for every use of abort on
   a system without safe signals.  */

weak_alias (__sigprocmask, sigprocmask)