xref: /netbsd-src/external/bsd/libevent/dist/sample/signal-test.c (revision 657871a79c9a2060a6255a242fa1a1ef76b56ec6)
1 /*	$NetBSD: signal-test.c,v 1.1.1.3 2021/04/07 02:43:15 christos Exp $	*/
2 /*
3  * Compile with:
4  * cc -I/usr/local/include -o signal-test \
5  *   signal-test.c -L/usr/local/lib -levent
6  */
7 
8 #include <sys/types.h>
9 
10 #include <event2/event-config.h>
11 
12 #include <sys/stat.h>
13 #ifndef _WIN32
14 #include <sys/queue.h>
15 #include <unistd.h>
16 #include <sys/time.h>
17 #else
18 #include <winsock2.h>
19 #include <windows.h>
20 #endif
21 #include <signal.h>
22 #include <fcntl.h>
23 #include <stdlib.h>
24 #include <stdio.h>
25 #include <string.h>
26 #include <errno.h>
27 
28 #include <event2/event.h>
29 
30 int called = 0;
31 
32 static void
signal_cb(evutil_socket_t fd,short event,void * arg)33 signal_cb(evutil_socket_t fd, short event, void *arg)
34 {
35 	struct event *signal = arg;
36 
37 	printf("signal_cb: got signal %d\n", event_get_signal(signal));
38 
39 	if (called >= 2)
40 		event_del(signal);
41 
42 	called++;
43 }
44 
45 int
main(int argc,char ** argv)46 main(int argc, char **argv)
47 {
48 	struct event *signal_int = NULL;
49 	struct event_base* base;
50 	int ret = 0;
51 #ifdef _WIN32
52 	WORD wVersionRequested;
53 	WSADATA wsaData;
54 
55 	wVersionRequested = MAKEWORD(2, 2);
56 
57 	(void) WSAStartup(wVersionRequested, &wsaData);
58 #endif
59 
60 	/* Initialize the event library */
61 	base = event_base_new();
62 	if (!base) {
63 		ret = 1;
64 		goto out;
65 	}
66 
67 	/* Initialize one event */
68 	signal_int = evsignal_new(base, SIGINT, signal_cb, event_self_cbarg());
69 	if (!signal_int) {
70 		ret = 2;
71 		goto out;
72 	}
73 	event_add(signal_int, NULL);
74 
75 	event_base_dispatch(base);
76 
77 out:
78 	if (signal_int)
79 		event_free(signal_int);
80 	if (base)
81 		event_base_free(base);
82 	return ret;
83 }
84 
85