91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/* $NetBSD: example.c,v 1.5 2009/10/20 05:33:30 jnemeth Exp $ */
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/*-
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* Copyright (c) 2008 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: example.c,v 1.5 2009/10/20 05:33:30 jnemeth Exp $");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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/*
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* Last parameter of MODULE macro is name of modules on
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* which defined module depends.
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*/
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MODULE(MODULE_CLASS_MISC, example, NULL);
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static
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void
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handle_props(prop_dictionary_t props)
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{
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prop_string_t str;
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if (props != NULL) {
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str = prop_dictionary_get(props, "msg");
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} else {
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str = NULL;
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}
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if (str == NULL)
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printf("The 'msg' property was not given.\n");
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else if (prop_object_type(str) != PROP_TYPE_STRING)
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printf("The 'msg' property is not a string.\n");
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else {
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const char *msg = prop_string_cstring_nocopy(str);
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if (msg == NULL)
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printf("Failed to process the 'msg' property.\n");
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else
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printf("The 'msg' property is: %s\n", msg);
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}
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}
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static int
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example_modcmd(modcmd_t cmd, void *arg)
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{
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switch (cmd) {
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case MODULE_CMD_INIT:
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printf("Example module loaded.\n");
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handle_props(arg);
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break;
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case MODULE_CMD_FINI:
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printf("Example module unloaded.\n");
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break;
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case MODULE_CMD_STAT:
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printf("Example module status queried.\n");
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return ENOTTY;
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default:
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return ENOTTY;
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}
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return 0;
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}
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