xref: /netbsd-src/sys/modules/examples/hello/hello.c (revision 14e2571904077c981cf5117cb4adbc7baa12af4b)
1 /*	$NetBSD: hello.c,v 1.1 2015/05/13 07:07:36 pgoyette Exp $	*/
2 
3 /*-
4  * Copyright (c) 2015 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26  * POSSIBILITY OF SUCH DAMAGE.
27  */
28 
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: hello.c,v 1.1 2015/05/13 07:07:36 pgoyette Exp $");
31 
32 #include <sys/param.h>
33 #include <sys/module.h>
34 
35 /*
36  * Last parameter of MODULE macro is a list of names (as string; names are
37  * separated by commas) of dependencies.  If module has no dependencies,
38  * then NULL should be passed.
39  */
40 
41 MODULE(MODULE_CLASS_MISC, hello, NULL);
42 
43 static int
hello_modcmd(modcmd_t cmd,void * arg __unused)44 hello_modcmd(modcmd_t cmd, void *arg __unused)
45 {
46 	switch (cmd) {
47 	case MODULE_CMD_INIT:
48 		printf("Example module loaded.\n");
49 		break;
50 
51 	case MODULE_CMD_FINI:
52 		printf("Example module unloaded.\n");
53 		break;
54 
55 	case MODULE_CMD_STAT:
56 		printf("Example module status queried.\n");
57 		break;
58 
59 	default:
60 		return ENOTTY;
61 	}
62 
63 	return 0;
64 }
65