1 /* Copyright (C) 1991-2022 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, see
16    <https://www.gnu.org/licenses/>.  */
17 
18 #include <errno.h>
19 #include <signal.h>
20 
21 /* Set the handler for the signal SIG to HANDLER,
22    returning the old handler, or SIG_ERR on error.  */
23 __sighandler_t
__sysv_signal(int sig,__sighandler_t handler)24 __sysv_signal (int sig, __sighandler_t handler)
25 {
26   /* Check signal extents to protect __sigismember.  */
27   if (handler == SIG_ERR || sig < 1 || sig >= NSIG)
28     {
29       __set_errno (EINVAL);
30       return SIG_ERR;
31     }
32 
33   __set_errno (ENOSYS);
34 
35   return SIG_ERR;
36 }
37 weak_alias (__sysv_signal, sysv_signal)
38 
39 stub_warning (sysv_signal)
40