1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #include <signal.h>
28 #include <stdlib.h>
29 #include <unistd.h>
30 
31 /*
32  * The canonical name should be 'go' since we prefer symbol names with fewer
33  * leading underscores.
34  */
35 
36 extern int a;
37 
38 int go(void);
39 
40 int a = 100;
41 
42 int
43 go(void)
44 {
45 	return (a);
46 }
47 
48 static void
49 handle(int sig __unused)
50 {
51 	go();
52 	exit(0);
53 }
54 
55 int
56 main(void)
57 {
58 	(void) signal(SIGUSR1, handle);
59 	for (;;)
60 		getpid();
61 }
62