--- tuncfg.c		2011-10-01 00:34:32.622948018 -0300
+++ tuncfg.c-new	2011-10-01 00:34:03.475694389 -0300
@@ -98,8 +98,8 @@
 	if (getuid() != 0)
 		errorf("tuncfg: must be run with superuser permissions\n");
 
-	// lcok
-	fd = open(LOCK_PATH, O_CREAT);
+	// lock
+	fd = open(LOCK_PATH, O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
 	if (fd < 0)
 		errorf("tuncfg: cannot open lock file %s -- %s\n",
 			LOCK_PATH, strerror(errno));