1 /*	$OpenBSD: main.c,v 1.1.1.1 2005/09/30 15:14:46 kurt Exp $	*/
2 
3 /*
4  * Copyright (c) 2005 Kurt Miller <kurt@openbsd.org>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #include <dlfcn.h>
20 #include <stdio.h>
21 
22 int
23 main()
24 {
25 	int ret = 0;
26 	int (*bbTest2)(void);
27 	void *libbb;
28 	void *libaa;
29 
30 	libaa = dlopen("libaa.so", RTLD_LAZY|RTLD_GLOBAL);
31 	libbb = dlopen("libbb.so", RTLD_LAZY|RTLD_GLOBAL);
32 
33 	if (libaa == NULL) {
34 		printf("dlopen(\"libaa.so\", RTLD_LAZY|RTLD_GLOBAL) FAILED\n");
35 		return (1);
36 	}
37 
38 	if (libbb == NULL) {
39 		printf("dlopen(\"libbb.so\", RTLD_LAZY|RTLD_GLOBAL) FAILED\n");
40 		return (1);
41 	}
42 
43         bbTest2 = dlsym(libbb, "bbTest2");
44 
45 	/* call bbTest2 to force lazy binding to duplicateFun in libaa */
46         (*bbTest2)();
47 
48 	dlclose(libaa);
49 
50 	/* call bbTest2 again to ensure libaa was not unloaded (still needed) */
51         ret = (*bbTest2)();
52 
53 	dlclose(libbb);
54 
55 	return (ret);
56 }
57