1 files changed, 22 insertions, 0 deletions
diff --git a/util.c b/util.c
new file mode 100644
index 0000000..d8c65b8
--- /dev/null
+++ b/util.c
@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <errno.h>
+#include "util.h"
+
+void die(const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	fprintf(stderr, "error: ");
+	vfprintf(stderr, fmt, ap);
+	if (errno)
+		fprintf(stderr, " (%d): %s\n", errno, strerror(errno));
+	else
+		fputc('\n', stderr);;
+	va_end(ap);
+
+	exit(errno);
+}