Index: uspace/lib/c/generic/config.c
===================================================================
--- uspace/lib/c/generic/config.c	(revision fd384d6ced77609e6ad611854814f0fac2b27b41)
+++ uspace/lib/c/generic/config.c	(revision fd384d6ced77609e6ad611854814f0fac2b27b41)
@@ -0,0 +1,80 @@
+/*
+ * 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 <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_lcmp(arg, key, str_length(key)))
+			break;
+		else
+			value = NULL;
+	}
+
+	if (value)
+		value = str_dup(value);
+
+	free(boot_args);
+
+	return value;
+}
+
+/** @}
+ */