1 /* Copyright (C) 1993, 1995, 1997, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by David Mosberger (davidm@azstarnet.com).
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19 #include <features.h>
20 #include <errno.h>
21 #include <sys/syscall.h>
22 #include <signal.h>
23 #include <string.h>
24
25 /* When there is kernel support for more than 64 signals, we'll have to
26 switch to a new system call convention here. */
27
_syscall2(int,osf_sigprocmask,int,how,unsigned long int,setval)28 static __inline__ _syscall2(int, osf_sigprocmask, int, how, unsigned long int, setval)
29
30 int
31 sigprocmask (int how, const sigset_t *set, sigset_t *oset)
32 {
33 unsigned long int setval;
34 long result;
35
36 if (set)
37 setval = set->__val[0];
38 else
39 {
40 setval = 0;
41 how = SIG_BLOCK; /* ensure blocked mask doesn't get changed */
42 }
43
44 result = osf_sigprocmask(how, setval);
45 if (result == -1)
46 /* If there are ever more than 64 signals, we need to recode this
47 in assembler since we wouldn't be able to distinguish a mask of
48 all 1s from -1, but for now, we're doing just fine... */
49 return result;
50
51 if (oset)
52 {
53 if (_SIGSET_NWORDS == 2) /* typical */
54 oset->__val[1] = 0;
55 if (_SIGSET_NWORDS > 2)
56 memset(oset, 0, sizeof(*oset));
57 oset->__val[0] = result;
58 }
59 return 0;
60 }
61 libc_hidden_def(sigprocmask)
62