/* * Copyright (c) 2016 Jakub Jermar * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - 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. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 <stdlib.h> #include <stdbool.h> #include <stddef.h> #include <config.h> #include <sysinfo.h> #include <str.h> bool config_key_exists(const char *key) { char *value; bool exists; value = config_get_value(key); exists = (value != NULL); free(value); return exists; } char *config_get_value(const char *key) { char *value = NULL; char *boot_args; size_t size; boot_args = sysinfo_get_data("boot_args", &size); if (!boot_args || !size) { /* * No boot arguments, no value. */ return NULL; } char *args = boot_args; char *arg; while ((arg = str_tok(args, " ", &args)) != NULL) { arg = str_tok(arg, "=", &value); if (arg && !str_cmp(arg, key)) break; else value = NULL; } if (value) value = str_dup(value); free(boot_args); return value; } /** @} */