#!/bin/sh
#
# Inspiration stolen from the fetchmail* packages. Thanks Henrique!
#
#

set -e

case "$1" in
	configure)
		# create system dhcpd user and group
		adduser --system --quiet --no-create-home --home /var/run --group dhcpd
		;;

	abort-upgrade|abort-remove|abort-deconfigure)
		exit 0
		;;

	*)
		echo "postinst called with unknown argument \`$1'" >&2
		exit 0
		;;
esac

# Handle debconf
. /usr/share/debconf/confmodule

INITCONFFILE=/etc/default/isc-dhcp-server

# We generate several files during the postinst, and we don't want
#	them to be readable only by root.
umask 022

# Generate configuration file if it does not exist, using default values.
[ -r "${INITCONFFILE}" ] || {
	echo Generating ${INITCONFFILE}... >&2
	cat >${INITCONFFILE} <<'EOFMAGICNUMBER1234'
# Defaults for dhcp initscript
# sourced by /etc/init.d/dhcp
# installed at /etc/default/isc-dhcp-server by the maintainer scripts

#
# This is a POSIX shell fragment
#

# On what interfaces should the DHCP server (dhcpd) serve DHCP requests?
#	Separate multiple interfaces with spaces, e.g. "eth0 eth1".
INTERFACES=""
EOFMAGICNUMBER1234
}

# ------------------------- Debconf questions start ---------------------

db_get isc-dhcp-server/interfaces || true
INTERFACES="${RET}"

TMPFILE=`mktemp -q ${INITCONFFILE}.new.XXXXXX`
sed -e "s,^[[:space:]]*INTERFACES[[:space:]]*=.*,INTERFACES=\"${INTERFACES}\"," \
	<${INITCONFFILE} >${TMPFILE}
cp ${TMPFILE} ${INITCONFFILE}
rm ${TMPFILE}

# ------------------------- Debconf questions end ---------------------
db_stop

if [ ! -e /var/lib/dhcp/dhcpd.leases ]; then
    if test -e /var/lib/dhcp3/dhcpd.leases; then
        cp /var/lib/dhcp3/dhcpd.leases /var/lib/dhcp/dhcpd.leases
    else
	touch /var/lib/dhcp/dhcpd.leases
    fi
fi

# If we're upgrading from dhcp3, copy the config and leases over to the new
# locations
if [ -z "$2" ]; then
	if [ -f /etc/dhcp3/dhcpd.conf ]; then
		cp /etc/dhcp3/dhcpd.conf /etc/dhcp/dhcpd.conf
	fi
	if [ -f /var/lib/dhcp3/dhcpd.leases ]; then
		cp /var/lib/dhcp3/dhcpd.leases /var/lib/dhcp/dhcpd.leases
	fi
fi

[ -x /sbin/restorecon ] && restorecon /var/lib/dhcp/dhcpd.leases

init_script_error_handler()
{
	return 0
}

# Automatically added by dh_installinit
if [ -x "/etc/init.d/isc-dhcp-server" ]; then
	update-rc.d isc-dhcp-server defaults >/dev/null
	invoke-rc.d isc-dhcp-server start || init_script_error_handler
fi
# End automatically added section
# Automatically added by dh_apparmor
if [ "$1" = "configure" ]; then
    APP_PROFILE=/etc/apparmor.d/usr.sbin.dhcpd
    if [ -f "$APP_PROFILE" ]; then
        # Add the local/ include
        LOCAL_APP_PROFILE=/etc/apparmor.d/local/usr.sbin.dhcpd

        test -e "$LOCAL_APP_PROFILE" || {
            tmp=`mktemp`
        cat <<EOM > "$tmp"
# Site-specific additions and overrides for usr.sbin.dhcpd.
# For more details, please see /etc/apparmor.d/local/README.
EOM
            mkdir `dirname $LOCAL_APP_PROFILE` 2>/dev/null || true
            mv -f "$tmp" "$LOCAL_APP_PROFILE"
            chmod 644 "$LOCAL_APP_PROFILE"
        }

        # Reload the profile, including any abstraction updates
        if aa-status --enabled 2>/dev/null; then
            apparmor_parser -r -T -W "$APP_PROFILE" || true
        fi
    fi
fi
# End automatically added section


exit 0