- Rename getpty() to xgetpty() and adjust callers.

- Rewrite kbd_mode and setconsole
- Introduce and use console_make_active() and xopen_xwrite_close()
- honour buffer-reservation method as set by the user (dumpkmap, loadkmap)
- shrink rtcwake and some console-tools

  Saves about 270 Bytes

networking/telnetd.c

@@ -164,11 +164,7 @@ make_new_session(
 	/*ts->buf2 = ts->buf1 + BUFSIZE;*/
 
 	/* Got a new connection, set up a tty. */
-	fd = getpty(tty_name);
-	if (fd < 0) {
-		bb_error_msg("can't create pty");
-		return NULL;
-	}
+	fd = xgetpty(tty_name);
 	if (fd > maxfd)
 		maxfd = fd;
 	ts->ptyfd = fd;