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This is X Transparent Lock. Xtrlock is a very minimal X display lock
program, which uses nothing except the Xlib library. It doesn't
obscure the screen, it is completely idle while the display is locked
and you don't type at it, and it doesn't do funny things to the X
access control lists. On my system the binary is under 10K
(Linux/i386, compiled with gcc -O2 -m486 -s).
Note that xtrlock currently does not work with shadow passwords. If
someone sends me some portable patches for shadow password support
I'll probably include them.
[ Shadow passwords are now supported on Linux, and Solaris 2.x (not
tested). To work with shadow passwords, this program should be
compiled with -DSHADOW_PWD and installed setuid root (it will drop
privileges as soon as possible). The shadow-aware version will
still work fine if you don't have shadow passwords.
April 9, 1996
-- Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl> ]
You need an ANSI C compiler, such as GCC. Do not attempt to compile
xtrlock with an old C compiler such as most systems' `cc'.
There is no support for X resources or command-line arguments - the
timeouts and cursor bitmaps and colours cannot be modified. If
someone sends me some Xlib-only X resource support I may include it.
To install xtrlock:
Build the program:
xmkmf
make
Test it:
./xtrlock
Install it and the manpage:
really make install install.man
xtrlock is Copyright 1993, 1994 Ian Jackson. It is free software; you
can redistribute it and/or modify it under the terms of the GNU
General Public License as published by the Free Software Foundation;
either version 2, or (at your option) any later version.
It 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.
In order to save space I have not included a copy of version 2 of the
GNU General Public Licence here. If you do not have one, send me
email at <ijackson@nyx.cs.du.edu>, or write to me at Churchill
College, Cambridge, CB3 0DS, United Kingdom, or to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
It is also available by anonymous FTP from prep.ai.mit.edu.
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