kde_lockscreen.sh

#!/bin/bash

################################################################################
################################################################################
# Name:        kde_lockscreen.sh
# Usage:
# Description:
# Created:     2018-05-11
# Copyright 2014, Victor Mendonca - http://victormendonca.com
#                                 - https://github.com/victorbrca
# License: Released under the terms of the GNU GPL license v3
################################################################################
################################################################################


#-------------------------------------------------------------------------------
# Sets variables
#-------------------------------------------------------------------------------

log="/home/victor/bin/var/log/kde_lockscreen_${HOSTNAME}.log"


#-------------------------------------------------------------------------------
# Functions
#-------------------------------------------------------------------------------

_logMe () {
  echo -e "$(date)\t-\t${1}" >> "$log"
}

_getMonitorStatus () {
  monitor_status=$(xset -q | grep Monitor | awk '{print $NF}')
  if [[ ! "$monitor_status" ]] ; then
    _logMe "Could not set status"
    sleep 10
  fi
}

_lockScreen () {
  qdbus org.freedesktop.ScreenSaver /ScreenSaver Lock
}

_getLockScreenStatus () {
  # true - active
  # false - disactive
  screensaver_status=$(qdbus org.freedesktop.ScreenSaver /ScreenSaver GetActive)
}

_main () {
  # set -x
  while true ; do
    _getMonitorStatus
    case "$monitor_status" in
      Off|Standby|Suspend)
        _getLockScreenStatus
        if [[ "$screensaver_status" == true ]] ; then
          sleep 10
          continue
        fi
        cnt=0
        while (( $cnt < 120 )) ; do
          _getMonitorStatus
          if [[ "$monitor_status" == "On" ]] ; then
            continue 2
          fi
          let cnt+=1
          sleep 1
        done

        _lockScreen
        echo "locked"
        ;;
    esac

    sleep 5
  done
}

#-------------------------------------------------------------------------------
# Starts script
#-------------------------------------------------------------------------------

_main