/* $NetBSD: example.c,v 1.6 2010/06/22 18:30:20 rmind Exp $ */ /*- * Copyright (c) 2008 The NetBSD Foundation, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: example.c,v 1.6 2010/06/22 18:30:20 rmind Exp $"); #include #include #include /* * Last parameter of MODULE macro is a list of names (as string; names are * separated by commas) of dependencies. If module has no dependencies, * then NULL should be passed. */ MODULE(MODULE_CLASS_MISC, example, NULL); static int handle_props(prop_dictionary_t props) { const char *msg; prop_string_t str; if (props == NULL) return EINVAL; str = prop_dictionary_get(props, "msg"); if (str == NULL) { printf("The 'msg' property was not given.\n"); return EINVAL; } if (prop_object_type(str) != PROP_TYPE_STRING) { printf("The 'msg' property is not a string.\n"); return EINVAL; } msg = prop_string_cstring_nocopy(str); if (msg == NULL) { printf("Failed to process the 'msg' property.\n"); } else { printf("The 'msg' property is: %s\n", msg); } return 0; } static int example_modcmd(modcmd_t cmd, void *arg) { int error; switch (cmd) { case MODULE_CMD_INIT: printf("Example module loaded.\n"); error = handle_props(arg); break; case MODULE_CMD_FINI: printf("Example module unloaded.\n"); error = 0; break; case MODULE_CMD_STAT: printf("Example module status queried.\n"); error = ENOTTY; break; default: error = ENOTTY; } return error; }