lockmon

#!/bin/bash

# Based on https://superuser.com/a/832111

# Add a service like the following to ~/.config/systemd/user/lockmon.service
#
# [Unit]
# Description=Log GNOME locks and unlocks
#
# [Service]
# Type=simple
# ExecStart=%h/.local/bin/lockmon
# Restart=always
# TimeoutStopSec=5
#
# [Install]
# WantedBy=default.target
#
# ... and run: systemctl --user enable --now lockmon

exit_report() {
    echo "Monitoring Terminated."
}

trap "exit_report; exit;" 0

format-log() {
    while IFS= read -r line; do
        echo "$line"                                                           \
            | grep "boolean"                                                   \
            | sed 's/   boolean true/Screen Locked/'                           \
            | sed 's/   boolean false/Screen Unlocked/'
    done
}

echo "Monitoring Started."
dbus-monitor --session "type='signal',interface='org.gnome.ScreenSaver'"       \
    | format-log                                                               \