signal/sysv_signal.c

   1 /* Copyright (C) 1991, 1992, 1996, 1997 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <signal.h>
  21
  22 /* Set the handler for the signal SIG to HANDLER,
  23    returning the old handler, or SIG_ERR on error.  */
  24 __sighandler_t
  25 __sysv_signal (sig, handler)
  26      int sig;
  27      __sighandler_t handler;
  28 {
  29   /* Check signal extents to protect __sigismember.  */
  30   if (handler == SIG_ERR || sig < 1 || sig >= NSIG)
  31     {
  32       __set_errno (EINVAL);
  33       return SIG_ERR;
  34     }
  35
  36   __set_errno (ENOSYS);
  37
  38   return SIG_ERR;
  39 }
  40 weak_alias (__sysv_signal, sysv_signal)
  41
  42 stub_warning (sysv_signal)
  43 #include <stub-tag.h>