MFC r205008 and 205009:

Make script(1) a little less broken.

  Close the file descriptor to the TTY. There is no reason why the parent
  process should keep track of the descriptor. This ensures that the
  application inside properly drains the TTY during exit(2).

  Reported by:  alfred

usr.bin/script/script.c

@@ -158,6 +158,7 @@ main(int argc, char *argv[])
 	}
 	if (child == 0)
 		doshell(argv);
+	close(slave);
 
 	if (flushtime > 0)
 		tvp = &tv;