This file is indexed.

postinst is in isc-dhcp-relay 4.3.3-5ubuntu12.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh
#
#

set -e

case "$1" in
	configure)
		# continue below
		;;

	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

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

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

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

#
# This is a POSIX shell fragment
#

# What servers should the DHCP relay forward requests to?
SERVERS="172.16.0.10"

# On what interfaces should the DHCP relay (dhrelay) serve DHCP requests?
INTERFACES="eth0"

# Additional options that are passed to the DHCP relay daemon?
OPTIONS=""
EOFMAGICNUMBER1234
}

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

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

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

db_get isc-dhcp-relay/servers || true
SERVERS="${RET}"

TMPFILE=`mktemp -q /tmp/dhcp.config.XXXXXX`
sed -e "s/^[[:space:]]*SERVERS[[:space:]]*=.*/SERVERS=\"${SERVERS}\"/" \
        <${INITCONFFILE} >${TMPFILE}
cp ${TMPFILE} ${INITCONFFILE}
rm ${TMPFILE}

db_get isc-dhcp-relay/options || true
OPTIONS="${RET}"

TMPFILE=`mktemp -q /tmp/dhcp.config.XXXXXX`
sed -e "s/^[[:space:]]*OPTIONS[[:space:]]*=.*/OPTIONS=\"${OPTIONS}\"/" \
        <${INITCONFFILE} >${TMPFILE}
cp ${TMPFILE} ${INITCONFFILE}
rm ${TMPFILE}

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

db_stop

# Automatically added by dh_installinit
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
	if [ -x "/etc/init.d/isc-dhcp-relay" ]; then
		update-rc.d isc-dhcp-relay defaults >/dev/null
	fi
	if [ -x "/etc/init.d/isc-dhcp-relay" ] || [ -e "/etc/init/isc-dhcp-relay.conf" ]; then
		invoke-rc.d isc-dhcp-relay start || exit $?
	fi
fi
# End automatically added section
# Automatically added by dh_systemd_enable
# This will only remove masks created by d-s-h on package removal.
deb-systemd-helper unmask isc-dhcp-relay.service >/dev/null || true

# was-enabled defaults to true, so new installations run enable.
if deb-systemd-helper --quiet was-enabled isc-dhcp-relay.service; then
	# Enables the unit on first installation, creates new
	# symlinks on upgrades if the unit file has changed.
	deb-systemd-helper enable isc-dhcp-relay.service >/dev/null || true
else
	# Update the statefile to add new symlinks (if any), which need to be
	# cleaned up on purge. Also remove old symlinks.
	deb-systemd-helper update-state isc-dhcp-relay.service >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_installinit
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
	if [ -x "/etc/init.d/isc-dhcp-relay" ]; then
		update-rc.d isc-dhcp-relay defaults >/dev/null
	fi
	if [ -x "/etc/init.d/isc-dhcp-relay" ] || [ -e "/etc/init/isc-dhcp-relay.conf" ]; then
		invoke-rc.d isc-dhcp-relay start || exit $?
	fi
fi
# End automatically added section
# Automatically added by dh_systemd_enable
# This will only remove masks created by d-s-h on package removal.
deb-systemd-helper unmask isc-dhcp-relay.service >/dev/null || true

# was-enabled defaults to true, so new installations run enable.
if deb-systemd-helper --quiet was-enabled isc-dhcp-relay.service; then
	# Enables the unit on first installation, creates new
	# symlinks on upgrades if the unit file has changed.
	deb-systemd-helper enable isc-dhcp-relay.service >/dev/null || true
else
	# Update the statefile to add new symlinks (if any), which need to be
	# cleaned up on purge. Also remove old symlinks.
	deb-systemd-helper update-state isc-dhcp-relay.service >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_systemd_enable
# This will only remove masks created by d-s-h on package removal.
deb-systemd-helper unmask isc-dhcp-relay6.service >/dev/null || true

# was-enabled defaults to true, so new installations run enable.
if deb-systemd-helper --quiet was-enabled isc-dhcp-relay6.service; then
	# Enables the unit on first installation, creates new
	# symlinks on upgrades if the unit file has changed.
	deb-systemd-helper enable isc-dhcp-relay6.service >/dev/null || true
else
	# Update the statefile to add new symlinks (if any), which need to be
	# cleaned up on purge. Also remove old symlinks.
	deb-systemd-helper update-state isc-dhcp-relay6.service >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_installinit
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
	if [ -x "/etc/init.d/isc-dhcp-relay6" ]; then
		update-rc.d isc-dhcp-relay6 defaults >/dev/null
	fi
	if [ -x "/etc/init.d/isc-dhcp-relay6" ] || [ -e "/etc/init/isc-dhcp-relay6.conf" ]; then
		invoke-rc.d isc-dhcp-relay6 start || exit $?
	fi
fi
# End automatically added section
# Automatically added by dh_systemd_start
if [ -d /run/systemd/system ]; then
	systemctl --system daemon-reload >/dev/null || true
	deb-systemd-invoke start isc-dhcp-relay6.service >/dev/null || true
fi
# End automatically added section


exit 0