xtrlock locks the X server till the user enters their password at the keyboard.
xtrlock is running, the mouse and keyboard are grabbed and the mouse cursor
becomes a padlock. Output displayed by X programs, and windows put up
by new X clients, continue to be visible, and any new output is
The mouse and keyboard are returned when the user types their
password, followed by Enter or Newline. If an incorrect password is
entered the bell is sounded. Pressing Backspace or Delete erases one
character of a password partially typed; pressing Escape or Clear
clears anything that has been entered.
If too many attempts are made in too short a time further keystrokes
generate bells and are otherwise ignored until a timeout has expired.
The X server screen saver continues to operate normally; if it comes
into operation the display may be restored by the usual means of
touching a key (Shift, for example) or the mouse.
Copyright (C) 1993, 1994 by Ian Jackson.
Permission to use, copy, modify and distribute this software and its
documentation is granted under the terms of the GNU General Public
Licence, version 2 or later, as published by the Free Software
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.