blob: 28c9052d47a10a8a4cdee4bcf185621c86b1a95d [file] [log] [blame]
lh9ed821d2023-04-07 01:36:19 -07001/* Copyright (C) 1992-2015 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 <http://www.gnu.org/licenses/>. */
17
18#include <stddef.h>
19#include <signal.h>
20#include <errno.h>
21
22/* If INTERRUPT is nonzero, make signal SIG interrupt system calls
23 (causing them to fail with EINTR); if INTERRUPT is zero, make system
24 calls be restarted after signal SIG. */
25int
26siginterrupt (sig, interrupt)
27 int sig;
28 int interrupt;
29{
30#ifdef SA_RESTART
31 extern sigset_t _sigintr attribute_hidden; /* Defined in signal.c. */
32 struct sigaction action;
33
34 if (__sigaction (sig, (struct sigaction *) NULL, &action) < 0)
35 return -1;
36
37 if (interrupt)
38 {
39 __sigaddset (&_sigintr, sig);
40 action.sa_flags &= ~SA_RESTART;
41 }
42 else
43 {
44 __sigdelset (&_sigintr, sig);
45 action.sa_flags |= SA_RESTART;
46 }
47
48 if (__sigaction (sig, &action, (struct sigaction *) NULL) < 0)
49 return -1;
50
51 return 0;
52#else
53 __set_errno (ENOSYS);
54 return -1;
55#endif
56}