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Filename : reboot_required
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#!/bin/sh -e
#
#    reboot_required: determine if a reboot is required
#
#    Copyright (C) 2008 Canonical Ltd.
#    Copyright (C) 2011-2014 Dustin Kirkland
#
#    Authors: Dustin Kirkland <kirkland@byobu.org>
#
#    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, version 3 of the License.
#
#    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, see <http://www.gnu.org/licenses/>.

REBOOT_FLAG="/var/run/reboot-required"
RELOAD_FLAG="$BYOBU_RUN_DIR/reload-required"
POWERNAP_FLAG="/var/run/powernap/powersave"
UNATTENDED_UPGRADE_FLAG="/var/run/unattended-upgrades.pid"

__reboot_required_detail() {
		[ -e "$REBOOT_FLAG" ] && ls -alF "$REBOOT_FLAG" 2>&1
		[ -e "$RELOAD_FLAG" ] && ls -alF "$RELOAD_FLAG" 2>&1
		[ -e "$POWERNAP_FLAG" ] && ls -alF "$POWERNAP_FLAG" 2>&1
		[ -e "$POWERNAP_FLAG" ] && cat "$POWERNAP_FLAG" 2>&1
}

__reboot_required() {
	local status="$BYOBU_RUN_DIR/status.$BYOBU_BACKEND/reboot_required"
	local livepatched=0
	if [ -e "$UNATTENDED_UPGRADE_FLAG" ]; then
		color b R W; printf "$ICON_UPGRADE "; color --;
	fi
	while read line; do
		set -- ${line}
		case "$line" in
			kpatch_livepatch_*)
				color k G; printf "$ICON_LIVEPATCHED"; color -;
				livepatched=1
				break
			;;
		esac
	done < /proc/modules
	if [ -e "$REBOOT_FLAG" ]; then
		if [ "$livepatched" = "1" ]; then
			color k G; printf "$ICON_REBOOT"; color --;
		else
			color b k R; printf "$ICON_REBOOT"; color --;
		fi
	fi
	if [ -e "$RELOAD_FLAG" ]; then
		color b W; printf "<"; color -; color b b W; printf "F5"; color -; color b W; printf ">"; color -; printf " "
	elif [ -s "$status" ]; then
		rm -f "$status"
	fi
	if [ -e "$POWERNAP_FLAG" ]; then
		color b W; printf ".zZ"; color --
	elif [ -s "$status" ]; then
		rm -f "$status"
	fi
}

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