Index: uspace/app/corecfg/Makefile
===================================================================
--- uspace/app/corecfg/Makefile	(revision 92c168040f5d9bf9ee5fb484770545a4555d29e0)
+++ uspace/app/corecfg/Makefile	(revision 92c168040f5d9bf9ee5fb484770545a4555d29e0)
@@ -0,0 +1,35 @@
+#
+# Copyright (c) 2013 Jiri Svoboda
+# 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.
+#
+
+USPACE_PREFIX = ../..
+BINARY = corecfg
+
+SOURCES = \
+	corecfg.c
+
+include $(USPACE_PREFIX)/Makefile.common
Index: uspace/app/corecfg/corecfg.c
===================================================================
--- uspace/app/corecfg/corecfg.c	(revision 92c168040f5d9bf9ee5fb484770545a4555d29e0)
+++ uspace/app/corecfg/corecfg.c	(revision 92c168040f5d9bf9ee5fb484770545a4555d29e0)
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2013 Jiri Svoboda
+ * 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.
+ */
+
+/** @addtogroup corecfg
+ * @{
+ */
+/** @file Core file configuration utility.
+ */
+
+#include <corecfg.h>
+#include <errno.h>
+#include <stdio.h>
+
+#define NAME "dnscfg"
+
+static void print_syntax(void)
+{
+	printf("Syntax:\n");
+	printf("\t%s [get]\n", NAME);
+	printf("\t%s enable\n", NAME);
+	printf("\t%s disable\n", NAME);
+}
+
+static int corecfg_print(void)
+{
+	bool enable;
+	int rc;
+
+	rc = corecfg_get_enable(&enable);
+	if (rc != EOK) {
+		printf("Failed getting core file setting.\n");
+		return 1;
+	}
+
+	printf("Core files: %s.\n", enable ? "enabled" : "disabled");
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	int rc;
+
+	rc = corecfg_init();
+	if (rc != EOK) {
+		printf("Failed contacting corecfg service.\n");
+		return 1;
+	}
+
+	if ((argc < 2) || (str_cmp(argv[1], "get") == 0))
+		return corecfg_print();
+	else if (str_cmp(argv[1], "enable") == 0)
+		return corecfg_set_enable(true);
+	else if (str_cmp(argv[1], "disable") == 0)
+		return corecfg_set_enable(false);
+	else {
+		printf("%s: Unknown command '%s'.\n", NAME, argv[1]);
+		print_syntax();
+		return 1;
+	}
+
+	return 0;
+}
+
+/** @}
+ */