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#!/bin/bash
#
# CDM: The Console Display Manager
#
# Copyright (C) 2009-2011, Daniel J Griffiths <ghost1227@archlinux.us>
# Thanks to:
#
# Andrwe beta-testing and submitting the fix for the all
# important X incrementation function
# brisbin33 code cleanup
# tigrmesh finding a critical issue with the gnome-session handler
# Profjim several incredibly useful patches
# lambchops468 consolekit and hibernation patches
# CasperVector Massive rearchitecturing and code sanisation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.

name=$(basename "$0")
consolekit=false
cktimeout=30
source /etc/init.d/functions.sh

args=`getopt -n "$name" -o ct: -l consolekit,timeout: -- "$@"` || exit 1
eval set -- "$args"
for arg in "$@"
do
case $arg in
'--consolekit' | '-c')
consolekit=true; shift
;;
'--timeout' | '-t')
shift
cktimeout=$1; shift
;;
'--')
shift
break
;;
esac
done

# Do first to avoid race conditions.
if $consolekit; then
ebegin "$name: waiting for ConsoleKit to register X session"
sleep "$cktimeout" & clockpid=$!
dbuspidfifo=$(mktemp --dry-run --tmpdir $name.XXXXXXXX)
if ! mkfifo "$dbuspidfifo"; then
eend "$name: failed to create FIFO \`$fifo'."
exit 1
fi

(dbus-monitor --system 'type=signal,interface=org.freedesktop.ConsoleKit.Seat,member=SessionAdded' & echo $! > "$dbuspidfifo") |
sed -un 's@[[:space:]]*object path \"\(/[a-zA-Z0-9/]*\)\"@\1@p' | while read object; do
if dbus-send --system --print-reply --dest='org.freedesktop.ConsoleKit' "$object" 'org.freedesktop.ConsoleKit.Session.GetX11Display' |
grep -qF "$display"
then
kill "$clockpid"
break
fi
done &
dbuspid=$(<"$dbuspidfifo"); rm -f "$dbuspidfifo"
fi

# Conform to POSIX and do not use `>&' here.
sh -i -c "(startx $* > /dev/null 2>&1 &)"

# If wait(1) returns with a value >128, it was interrupted by kill(1), so registration was sucessful.
if [[ -n "$clockpid" ]]; then
if wait "$clockpid" >& /dev/null
then
kill "$dbuspid"
eend "$name: ConsoleKit registration timed out."
exit 1
else
kill "$dbuspid"
eend 0
exit 0
fi
fi

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