Adding error.c/.h

error.h

@@ -0,0 +1,34 @@
+/* error.h - Error handling helper routines.
+ *
+ *   Copyright (C) 2011       Henrik Hautakoski <henrik@fiktivkod.org>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ *   MA 02110-1301, USA.
+ */
+#ifndef ERROR_H
+#define ERROR_H
+
+#include <string.h>
+#include <errno.h>
+
+void usage(const char *msg, ...);
+
+void warn(const char *msg, ...);
+
+void die(const char *msg, ...);
+
+int error(const char *msg, ...);
+
+#endif /* ERROR_H */