1 files changed, 23 insertions, 0 deletions

diff --git a/util.c b/util.c
new file mode 100644
index 0000000..9b27512
--- /dev/null
+++ b/util.c
@@ -0,0 +1,23 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "util.h"
+
+void
+die(const char *fmt, ...) {
+        va_list ap;
+
+        va_start(ap, fmt);
+        vfprintf(stderr, fmt, ap);
+        va_end(ap);
+
+        if (fmt[0] && fmt[strlen(fmt)-1] == ':') {
+                fputc(' ', stderr);
+                perror(NULL);
+        }
+
+        exit(1);
+}