XDM Shutdown control panel
Simple Xlib control panel for shutting down, rebooting, suspending or hibernating the system.
XDM is an OK Display Manager, but unlike other display managers it doesn’t have controls to shutdown or reboot the computer. You need to log in, then use your Desktop Environment or Window Managers shutdown options.
I wanted to use XDM on my old laptop, but wanted to add the ability to shutdown from the login screen. There are two ways to do this. Firstly, modify the XDM source code itself, secondly, run another program which gives the user those options. The first is neater, but a bit of a hassle if you use your distributions package manager to install xdm. The second option is a little messier, but works.
This program adds a button to shutdown, reboot, suspend and hibernate.
To use this, add the following two likes to the Xstartup file in the xdm configuration directory.
pid=$(cat /var/run/xdmshutdown.pid 2>/dev/null)
test "$pid" && kill -9 $pid 2>/var/log/xdmshutdown.log
Then add the following two lines to the Xsetup file in the xdm configuration directory. This assumes the executable is stored in /usr/local/sbin.
/usr/local/sbin/xdmshutdown -geometry +350+400 &
echo $! > /var/run/xdmshutdown.pid
This is based on xtut9 at http://xopendisplay.hilltopia.ca/2009/Mar/Xlib-tutorial-part-9----Buttons.html
You can download the source here
You can download the binary here (64bit)