xref: /netbsd-src/sys/modules/examples/properties/properties.c (revision 14e2571904077c981cf5117cb4adbc7baa12af4b)
1 /*	$NetBSD: properties.c,v 1.1 2015/05/13 07:07:36 pgoyette Exp $	*/
2 
3 /*-
4  * Copyright (c) 2008 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: properties.c,v 1.1 2015/05/13 07:07:36 pgoyette Exp $");
31 
32 #include <sys/param.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 
36 MODULE(MODULE_CLASS_MISC, properties, NULL);
37 
38 static void
handle_props(prop_dictionary_t props)39 handle_props(prop_dictionary_t props)
40 {
41 	const char *msg;
42 	prop_string_t str;
43 
44 	if (props != NULL) {
45 		str = prop_dictionary_get(props, "msg");
46 	} else {
47 		printf("No property dictionary was provided.\n");
48 		str = NULL;
49 	}
50 	if (str == NULL)
51 		printf("The 'msg' property was not given.\n");
52 	else if (prop_object_type(str) != PROP_TYPE_STRING)
53 		printf("The 'msg' property is not a string.\n");
54 	else {
55 		msg = prop_string_cstring_nocopy(str);
56 		if (msg == NULL)
57 			printf("Failed to process the 'msg' property.\n");
58 		else
59 			printf("The 'msg' property is: %s\n", msg);
60 	}
61 }
62 
63 static int
properties_modcmd(modcmd_t cmd,void * arg)64 properties_modcmd(modcmd_t cmd, void *arg)
65 {
66 	switch (cmd) {
67 	case MODULE_CMD_INIT:
68 		handle_props(arg);
69 		return 0;
70 	case MODULE_CMD_FINI:
71 		return 0;
72 	default:
73 		return ENOTTY;
74 	}
75 }
76