Watch screensaver activity and log

monitor-screensaver

#!/bin/bash
# watch screensaver's lock/unlock activity and log

log=$HOME/usr/var/log/screensaver.log

DIE () {
    touch $log
    echo "ERROR: $*" | tee -a $log >&2
}

# c.f. http://people.gnome.org/~mccann/gnome-screensaver/docs/gnome-screensaver.html#gs-intro
dbuswatch="type='signal',interface='org.gnome.ScreenSaver',member='ActiveChanged'"

touch $log
dbus-monitor "$dbuswatch" | while read line
do
    case $line in
        boolean*)
            datetime=`date +%Y%m%d-%H:%M:%S`
            echo "$datetime ActiveChanged: $line" >> $log
            ;;
        *)
            continue
            ;;
    esac
done