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b8f253e8 | 1 | /* |
8a376f64 | 2 | * Copyright (c) 1989 Regents of the University of California. |
84cb68a1 KB |
3 | * All rights reserved. |
4 | * | |
c0567266 KB |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
b8f253e8 KM |
32 | */ |
33 | ||
2ce81398 | 34 | #if defined(LIBC_SCCS) && !defined(lint) |
1c15e888 | 35 | static char sccsid[] = "@(#)siginterrupt.c 5.5 (Berkeley) 6/1/90"; |
84cb68a1 | 36 | #endif /* LIBC_SCCS and not lint */ |
6fa13af1 KM |
37 | |
38 | #include <signal.h> | |
39 | ||
40 | /* | |
41 | * Set signal state to prevent restart of system calls | |
42 | * after an instance of the indicated signal. | |
43 | */ | |
44 | siginterrupt(sig, flag) | |
45 | int sig, flag; | |
46 | { | |
8a376f64 MK |
47 | extern sigset_t _sigintr; |
48 | struct sigaction sa; | |
6fa13af1 KM |
49 | int ret; |
50 | ||
8a376f64 | 51 | if ((ret = sigaction(sig, (struct sigaction *)0, &sa)) < 0) |
6fa13af1 | 52 | return (ret); |
8a376f64 MK |
53 | if (flag) { |
54 | sigaddset(&_sigintr, sig); | |
55 | sa.sa_flags &= ~SA_RESTART; | |
56 | } else { | |
57 | sigdelset(&_sigintr, sig); | |
58 | sa.sa_flags |= SA_RESTART; | |
59 | } | |
60 | return (sigaction(sig, &sa, (struct sigaction *)0)); | |
6fa13af1 | 61 | } |