#!/bin/sh

set -e
 
# source debconf library
. /usr/share/debconf/confmodule
 
CONFIGFILE=/etc/ifplugd/ifplugd.conf
CONFIGTMP=${CONFIGFILE}.tmp

DEFAULTFILE=/etc/default/ifplugd
DEFAULTTMP=${DEFAULTFILE}.tmp

write_db_conf (){

	rm -f ${CONFIGTMP}

	echo "# this file is deprecated - use /etc/default/ifplugd." >> ${CONFIGTMP}
 
	mv ${CONFIGTMP} ${CONFIGFILE}
}

write_default (){

	rm -f ${DEFAULTTMP}

	(
	    echo "# This file may be changed either manually or by running dpkg-reconfigure."
	    echo "#"
	    echo "# N.B.: dpkg-reconfigure deletes everything from this file except for"
	    echo "# the assignments to variables INTERFACES, HOTPLUG_INTERFACES, ARGS and"
	    echo "# SUSPEND_ACTION.  When run it uses the current values of those variables"
	    echo "# as their default values, thus preserving the administrator's changes."
            echo "#"
            echo "# This file is sourced by both the init script /etc/init.d/ifplugd and"
            echo "# the udev script /lib/udev/ifplugd.agent to give default values."
            echo "# The init script starts ifplugd for all interfaces listed in"
            echo "# INTERFACES, and the udev script starts ifplugd for all interfaces"
            echo "# listed in HOTPLUG_INTERFACES. The special value "all" starts one"
            echo "# ifplugd for all interfaces being present."
	) >> $DEFAULTTMP

	db_get ifplugd/interfaces || true
	echo "INTERFACES=\"$RET\"" >> $DEFAULTTMP
	db_get ifplugd/hotplug_interfaces || true
	echo "HOTPLUG_INTERFACES=\"$RET\"" >> $DEFAULTTMP
	db_get ifplugd/args || true
	echo "ARGS=\"$RET\"" >> $DEFAULTTMP
	db_get ifplugd/suspend_action || true
	echo "SUSPEND_ACTION=\"$RET\"" >> $DEFAULTTMP
 
	mv ${DEFAULTTMP} ${DEFAULTFILE}
}

INTERFACES_BEFORE=""
INTERFACES_AFTER=""
INTERFACES_START=""
INTERFACES_STOP=""
INTERFACES_RESTART=""

search_interfaces () {
	searchifc=$1
	shift

	for i in $@; do
		if [ "$i" = "$searchifc" ]; then
			return 0
		fi
	done

	return 1
}

ifplugd_initscript () {
	action=$1
	shift

	if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
		invoke-rc.d ifplugd $action $@
	else
		/etc/init.d/ifplugd $action $@
	fi
}

case "$1" in
    configure)
 		if [ -s "$DEFAULTFILE" ] ; then
			INTERFACES=""
			HOTPLUG_INTERFACES=""
			. $DEFAULTFILE
			INTERFACES_BEFORE="$INTERFACES $HOTPLUG_INTERFACES"
		fi

		write_db_conf
		write_default

		if [ -s "$DEFAULTFILE" ] ; then
			INTERFACES=""
			HOTPLUG_INTERFACES=""
			. $DEFAULTFILE
			INTERFACES_AFTER="$INTERFACES $HOTPLUG_INTERFACES"
		fi

		for IF in $INTERFACES_BEFORE ; do
			if search_interfaces $IF $INTERFACES_AFTER ; then
				INTERFACES_RESTART="$INTERFACES_RESTART $IF"
			else
				INTERFACES_STOP="$INTERFACES_STOP $IF"
			fi
		done

		for IF in $INTERFACES_AFTER ; do
			if search_interfaces $IF $INTERFACES_BEFORE ; then
				: # already added to INTERFACES_RESTART
			else
				INTERFACES_START="$INTERFACES_START $IF"
			fi
		done

		if [ -x "/etc/init.d/ifplugd" ]; then
			update-rc.d ifplugd defaults >/dev/null
			if [ "$INTERFACES_STOP" ]; then
				ifplugd_initscript stop $INTERFACES_STOP
			fi
			if [ "$INTERFACES_RESTART" ]; then
				ifplugd_initscript restart $INTERFACES_RESTART
			fi
			if [ "$INTERFACES_START" ]; then
				ifplugd_initscript start $INTERFACES_START
			fi
		fi

		if [ ! "$2" ] || [ "$2" = "<unknown>" ] ; then
			# Fresh install
			for F in /etc/apm/suspend.d/20ifplugd \
				    /etc/apm/resume.d/80ifplugd /etc/apm/other.d/50ifplugd ; do
				[ -e $F ] && mv -f $F ${F}.dpkg-old
				ln -nsf ../scripts.d/ifplugd $F
			done
		fi
        ;;
 
    abort-upgrade|abort-remove|abort-deconfigure)
        ;;
esac

db_stop

#DEBHELPER#