postinst is in isc-dhcp-relay 4.2.4-7ubuntu12.
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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#
#
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 [ -x "/etc/init.d/isc-dhcp-relay" ] || [ -e "/etc/init/isc-dhcp-relay.conf" ]; then
if [ ! -e "/etc/init/isc-dhcp-relay.conf" ]; then
update-rc.d isc-dhcp-relay defaults >/dev/null
fi
invoke-rc.d isc-dhcp-relay start || exit $?
fi
# End automatically added section
# Automatically added by dh_installinit
update-rc.d -f isc-dhcp-relay remove >/dev/null || exit $?
# End automatically added section
# Automatically added by dh_installinit
if [ -x "/etc/init.d/isc-dhcp-relay6" ] || [ -e "/etc/init/isc-dhcp-relay6.conf" ]; then
if [ ! -e "/etc/init/isc-dhcp-relay6.conf" ]; then
update-rc.d isc-dhcp-relay6 defaults >/dev/null
fi
invoke-rc.d isc-dhcp-relay6 start || exit $?
fi
# End automatically added section
# Automatically added by dh_installinit
update-rc.d -f isc-dhcp-relay6 remove >/dev/null || exit $?
# End automatically added section
exit 0
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