1 /*
2  * Copyright (c) 1999-2004 Damien Miller <djm@mindrot.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "includes.h"
18 
19 #include <signal.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include <unistd.h>
23 
24 #include "openbsd-compat/bsd-signal.h"
25 
26 #undef signal
27 
28 mysig_t
29 mysignal(int sig, mysig_t act)
30 {
31 #ifdef HAVE_SIGACTION
32 	struct sigaction sa, osa;
33 
34 	if (sigaction(sig, NULL, &osa) == -1)
35 		return (mysig_t) -1;
36 	if (osa.sa_handler != act) {
37 		memset(&sa, 0, sizeof(sa));
38 		sigemptyset(&sa.sa_mask);
39 		sa.sa_flags = 0;
40 		if (sig == SIGALRM) {
41 #ifdef SA_INTERRUPT
42 			sa.sa_flags |= SA_INTERRUPT;
43 #endif
44 		} else {
45 #ifdef SA_RESTART
46 			sa.sa_flags |= SA_RESTART;
47 #endif
48 		}
49 		sa.sa_handler = act;
50 		if (sigaction(sig, &sa, NULL) == -1)
51 			return (mysig_t) -1;
52 	}
53 	return (osa.sa_handler);
54 #else
55 	return (signal(sig, act));
56 #endif
57 }
58 
59 #if !defined(HAVE_STRSIGNAL)
60 char *strsignal(int sig)
61 {
62 	static char buf[16];
63 
64 	(void)snprintf(buf, sizeof(buf), "%d", sig);
65 	return buf;
66 }
67 #endif
68 
69