1 /* Copyright (C) 1997 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 Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 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 Library General Public License for more details.
13
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If
16 not, see <https://www.gnu.org/licenses/>. */
17
18 #include "../include/sane/config.h"
19
20 #include <errno.h>
21
22 #ifndef HAVE_SIGPROCMASK
23
24 #define sigprocmask SOMETHINGELSE
25 #include <signal.h>
26 #undef sigprocmask
27
28 int
sigprocmask(int how, int *new, int *old)29 sigprocmask (int how, int *new, int *old)
30 {
31 int o, n = *new;
32
33 /* FIXME: Get this working on Windows. Probably should move to
34 * POSIX sigaction API and emulate it before emulating this one.
35 */
36 #ifndef WIN32
37 switch (how)
38 {
39 case 1: o = sigblock (n); break;
40 case 2: o = sigsetmask (sigblock (0) & ~n); break;
41 case 3: o = sigsetmask (n); break;
42 default:
43 errno = EINVAL;
44 return -1;
45 }
46 if (old)
47 *old = o;
48 #endif
49 return 0;
50 }
51
52 #endif /* !HAVE_SIGPROCMASK */
53