[ATrpms-users] gnome-screensaver with mythtv?

[Jeffrey J. Kosowsky]

Jeffrey J. Kosowsky wrote at about 04:34:45 -0500 on Wednesday, December 30, 2009:
 > I was hoping that there would be a cleaner way than using a
 > wrapper. It would be great if you could specify a list of programs
 > (either via a config file or via a gui) that gnome-screensaver would
 > check before activating.
 > 
 > But if I need to do a wrapper, it seems like I could do a similar
 > thing with gnome-screensaver. 
 > 
 > If you want the analog of the xscreensaver script, you can just do:
 > 
 > ----------------------------------------------------------------
 > #!/bin/bash
 > gnome-screensaver-command -exit
 > mythfrontend
 > gnome-screensaver
 > ----------------------------------------------------------------
 > 
 > However, if you want something a little fancier and more robust you
 > can use the '--inhibit' switch and also add a trap to ensure that the
 > inhibition is removed (and the screensaver restored) even if you kill
 > the script and it exits non-naturally. The trap probably has more
 > error checking than necessary, but why not be paranoid...
 > 
 > Note the use of "gnome-screensaver-command --inhibit" together with
 > using the trap to selectively only kill the corresponding process on
 > termination means that you can have several wrapper scripts for
 > multiple programs that independently inhibit the screensaver such that
 > the screensaver only can activate once *all* the programs terminate.
 > 
 > -----------------------------------------------------------------------
 > #/bin/bash
 > #Wrapper to inhibit gnome-screensaver when launching mythfrontend
 > #Jeff Kosowsky
 > 
 > function killonexit ()
 > {
 > 	procs=$(pgrep -d ' ' -u $USER -f "$command")
 > 	[[ -n $pid  && "$procs" =~ $pid ]] && kill -KILL $pid
 > }
 > 
 > trap killonexit INT EXIT
 > 
 > command='gnome-screensaver-command --inhibit --application-name="mythfrontend" --reason="Mythfrontend running..."'
 > 
 > $command &
 > pid=$!
 > mythfrontend
 > 
 > -------------------------------------------------------------------------

Here is a more general wrapper that you can use to *wrap* any program
without *any* modification. If you want to wrap the program
'myprogram' all you have to do is rename the following script as
${prefix}myprogram or link to it (where $prefix='j' by default but can
be almost any string). Nothing inside the script ever needs to be
modified. The program you want to run needs to be in your path.

----------------------------------------------------------------------------
#/bin/bash
#Wrapper to inhibit gnome-screensaver and launch the program 'basename' 
#minus the leading '$prefix''.
#Specifically, to wrap any program, just hard (or soft link) this
#with the string '$prefix' prefixed to the desired program you want to wrap.
#
#Jeff Kosowsky - December 2009

prefix="j"
basename=${0##*/}
progname=${basename#$prefix} #Run as 'basename' minus the leading '$prefix'
if [ "$progname" = "$basename" ] || ! which $progname >&/dev/null; then
	echo "Error: target '$progname' not in path..."
	exit 1
fi

function removeinhibit ()  # Kill 'gnome-screensaver-command --inhibit'
{
	procs=$(pgrep -d ' ' -u $USER -f "$command")
	[[ -n $pid  && "$procs" =~ $pid ]] && kill -KILL $pid
}

trap removeinhibit INT EXIT
   
command="gnome-screensaver-command --inhibit --application-name=\"$progname\" --reason=\"${progname^[a-z]} running...\""

$command &   #Inhibit gnome-screensaver
pid=$!
$progname $@ # Run program...