--- sysvinit-2.78/src/sulogin.c.foo	Wed Jan 31 14:06:36 2001
+++ sysvinit-2.78/src/sulogin.c	Wed Jan 31 15:37:18 2001
@@ -366,7 +366,8 @@
 	signal(SIGINT, SIG_IGN);
 	signal(SIGTSTP, SIG_IGN);
 	if (optind < argc) tty = argv[optind];
-	if (tty) {
+	if (tty && (fd = open(tty, O_RDONLY)) >= 0 && isatty(fd)) {
+		close(fd);
 		if ((fd = open(tty, O_RDWR)) >= 0) {
 
 			/*
@@ -400,6 +401,8 @@
 				close(fd);
 		} else
 			perror(tty);
+	} else {
+		if (fd>0) close(fd);
 	}
 
 	/*