--- /dev/null
+/* See LICENSE file for copyright and license details. */
+#include <time.h>
+
+#include "../util.h"
+
+const char *
+datetime(const char *fmt)
+{
+ time_t t;
+
+ t = time(NULL);
+ if (strftime(buf, sizeof(buf), fmt, localtime(&t)) == 0)
+ return NULL;
+
+ return buf;
+}