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
22/* If SET is not NULL, modify the current set of blocked signals
23 according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK.
24 If OSET is not NULL, store the old set of blocked signals in *OSET. */
25int
26__sigprocmask (int how, const sigset_t *set, sigset_t *oset)
27{
28 switch (how)
29 {
30 case SIG_BLOCK:
31 case SIG_UNBLOCK:
32 case SIG_SETMASK:
33 break;
34 default:
35 __set_errno (EINVAL);
36 return -1;
37 }
38
39 __set_errno (ENOSYS);
40 return -1;
41}
42
43/* No stub warning because abort calls __sigprocmask,
44 and we don't want warnings for every use of abort on
45 a system without safe signals. */
46
47libc_hidden_def (__sigprocmask)
48weak_alias (__sigprocmask, sigprocmask)
49

source code of glibc/signal/sigprocmask.c