#!/bin/sh

PATH=/sbin:/bin:/usr/bin

# Check session status using systemd

session_ids=$(systemd-loginctl list-sessions 2>/dev/null | awk '{print $1}')

for session in ${session_ids} ; do

	session_status=$(systemd-loginctl session-status ${session})

	echo "${session_status}" | grep -e '\(Active: yes\|State: active\)' &> /dev/null &&

		echo "${session_status}" | grep -e '\(gnome-settings-daemon\|kded4\|xfce4-power-manager\)' &> /dev/null && exit 0

done

# Get the ID of the first active X11 session: using ConsoleKit

uid_session=$(

ck-list-sessions 2>/dev/null | \

awk '

/^Session[0-9]+:$/ { uid = active = x11 = "" ; next }

{ gsub(/'\''/, "", $3) }

$1 == "unix-user" { uid = $3 }

$1 == "active" { active = $3 }

$1 == "x11-display" { x11 = $3 }

active == "TRUE" && x11 != "" {

	print uid

	exit

}')

# Check that there is a power manager, otherwise shut down.

[ "$uid_session" ] &&

ps axo uid,cmd | \

awk '

    $1 == '$uid_session' &&

	($2 ~ /gnome-power-manager/ || $2 ~ /kpowersave/ ||

	 $2 ~ /xfce4-power-manager/ || $2 ~ /\/usr\/libexec\/gnome-settings-daemon/ ||

	 $2 ~ /kded4/ || $3 ~ /guidance-power-manager/) \

		{ found = 1; exit }

    END { exit !found }

' ||

  shutdown -h now