This file is indexed.

postinst is in isc-dhcp-client 4.1.ESV-R4-0ubuntu5.10.

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

# Source debconf library.
. /usr/share/debconf/confmodule

case "$1" in
    configure)
        if [ ! -e /var/lib/dhcp/dhclient.leases ]; then
            if test -e /var/lib/dhcp3/dhclient.leases; then
                cp /var/lib/dhcp3/dhclient.leases /var/lib/dhcp/dhclient.leases
            else
                touch /var/lib/dhcp/dhclient.leases
            fi
        fi

	if [ -z "$2" ]; then
		if [ -e /etc/dhcp3/dhclient.conf ]; then
			cp /etc/dhcp3/dhclient.conf /etc/dhcp/dhclient.conf
		fi
	fi

	# Clean up old AppArmor profile for upgrades from Ubuntu 10.10 to 11.04
	# and 10.04 to 12.04 (ie, dhcp3-client -> isc-dhcp-client transition).
	# This is needed (as opposed to simply waiting for a 'purge') because
	# the dhclient3 and dhclient profiles provide AppArmor rules for the
	# same binaries (/usr/lib/NetworkManager/nm-dhcp-client.action and
	# /usr/lib/connman/scripts/dhclient-script) and not moving the old
	# profile aside would mean that the old rules for these binaries take
	# precedence over the rules provided by the new dhclient profile, since
	# the old one is loaded after the first. (LP: #688191)
	if dpkg --compare-versions "$2" lt 4.1.1-P1-15ubuntu2 ; then
		if [ -e /etc/apparmor.d/sbin.dhclient3 ]; then
			mv -f /etc/apparmor.d/sbin.dhclient3 /etc/apparmor.d/sbin.dhclient3.dpkg-old
		fi
	fi

        ;;

    abort-upgrade|abort-remove|abort-deconfigure)
        exit 0
        ;;
    
    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 0
        ;;
esac

# Automatically added by dh_apparmor
if [ "$1" = "configure" ]; then
    APP_PROFILE=/etc/apparmor.d/sbin.dhclient
    if [ -f "$APP_PROFILE" ]; then
        # Add the local/ include
        LOCAL_APP_PROFILE=/etc/apparmor.d/local/sbin.dhclient

        test -e "$LOCAL_APP_PROFILE" || {
            tmp=`mktemp`
        cat <<EOM > "$tmp"
# Site-specific additions and overrides for sbin.dhclient.
# 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