--- /dev/null
+#include <stdio.h>
+#include <stdlib.h>
+
+const char *FILENAME = "tl.log";
+
+void die(const char *message) {
+ fputs(message, stderr);
+ fputc('\n', stderr);
+ exit(1);
+}
+
+void die_err(const char *message) {
+ perror(message);
+ exit(1);
+}