Back to index

glibc  2.9
sysv_signal.c
Go to the documentation of this file.
00001 /* Copyright (C) 1991, 1992, 1996, 1997 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <errno.h>
00020 #include <signal.h>
00021 
00022 /* Set the handler for the signal SIG to HANDLER,
00023    returning the old handler, or SIG_ERR on error.  */
00024 __sighandler_t
00025 __sysv_signal (sig, handler)
00026      int sig;
00027      __sighandler_t handler;
00028 {
00029   /* Check signal extents to protect __sigismember.  */
00030   if (handler == SIG_ERR || sig < 1 || sig >= NSIG)
00031     {
00032       __set_errno (EINVAL);
00033       return SIG_ERR;
00034     }
00035 
00036   __set_errno (ENOSYS);
00037 
00038   return SIG_ERR;
00039 }
00040 weak_alias (__sysv_signal, sysv_signal)
00041 
00042 stub_warning (sysv_signal)
00043 #include <stub-tag.h>