.
[glibc/history.git] / signal / sigprocmask.c
blob472b3a4fa5d931edc3b44b20fd0f480244302d8b
1 /* Copyright (C) 1991, 1995, 1996, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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. */
19 #include <errno.h>
20 #include <signal.h>
23 /* If SET is not NULL, modify the current set of blocked signals
24 according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK.
25 If OSET is not NULL, store the old set of blocked signals in *OSET. */
26 int
27 __sigprocmask (how, set, oset)
28 int how;
29 const sigset_t *set;
30 sigset_t *oset;
32 switch (how)
34 case SIG_BLOCK:
35 case SIG_UNBLOCK:
36 case SIG_SETMASK:
37 break;
38 default:
39 __set_errno (EINVAL);
40 return -1;
43 __set_errno (ENOSYS);
44 return -1;
47 /* No stub warning because abort calls __sigprocmask,
48 and we don't want warnings for every use of abort on
49 a system without safe signals. */
51 weak_alias (__sigprocmask, sigprocmask)