#!/bin/sh

. /usr/share/debconf/confmodule

set -e

package_name()
{
    echo $(basename $0 .postinst)
}

# element() is a helper function for file-rc:
element() {
    local element list IFS

    element="$1"

    [ "$2" = "in" ] && shift
    list="$2"
    [ "$list" = "-" ] && return 1
    [ "$list" = "*" ] && return 0

    IFS=","
    set -- $list
    case $element in
	"$1"|"$2"|"$3"|"$4"|"$5"|"$6"|"$7"|"$8"|"$9")
	    return 0
    esac
    return 1
}

# filerc (runlevel, service) returns /etc/init.d/service, if service is
# running in $runlevel:
filerc() {
    local runlevel basename
    runlevel=$1
    basename=$2
    while read LINE
    do
	case $LINE in
	    \#*|"") continue
	esac

	set -- $LINE
	SORT_NO="$1"; STOP="$2"; START="$3"; CMD="$4"
	[ "$CMD" = "/etc/init.d/$basename" ] || continue

	if element "$runlevel" in "$START" || element "S" in "$START"
	then
	    echo "/etc/init.d/$basename"
	    return 0
	fi
    done < /etc/runlevel.conf
    echo ""
}

if [ "$1" = "configure" ]
then
    if [ ! -z "$2" ]; then
	# This triggers services restarting, so limit this to major upgrades
	# only. Security updates should not restart services automatically.
	if dpkg --compare-versions "$2" lt 1.1.1-1ubuntu2.1~18.04.2; then
            echo -n "Checking for services that may need to be restarted..."
            check="amanda-server anon-proxy apache2 apache-ssl"
            check="$check apf-firewall asterisk bacula-director-common"
            check="$check bacula-fd bacula-sd bind9 bip boinc-client"
            check="$check boxbackup-client boxbackup-server bozo cfengine2"
            check="$check cfengine3 citadel-server clamav-daemon clamav-freshclam"
            check="$check clamcour collectd-core conserver-server courier-imap-ssl"
            check="$check courier-mta-ssl courier-pop-ssl cyrus21-imapd"
            check="$check cyrus21-pop3d cyrus-common cyrus-imspd dovecot-core"
            check="$check ejabberd exim4 fetchmail freeradius ftpd-ssl gatling"
            check="$check globus-gatekeeper inn inn2 libapache-mod-ssl lighttpd lldpd"
            check="$check lwresd monit myproxy-server nagios-nrpe-server nginx-common"
            check="$check ntp openntpd openssh-server openvpn partimage-server"
            check="$check postfix postgresql-7.4 postgresql-8.0 postgresql-8.1"
            check="$check postgresql-8.2 postgresql-9.1 postgresql-9.2 postgresql-9.3"
            check="$check proftpd proftpd-ldap proftpd-basic"
            check="$check proftpd-mysql proftpd-pgsql racoon sendmail slapd"
            check="$check spamassassin ssh-nonfree stunnel4 syslog-ng tor unbound"
            check="$check vsftpd"
            # Only get the ones that are installed, and configured
            check=$(dpkg -s $check 2> /dev/null | egrep '^Package:|^Status:' | awk '{if ($1 ~ /^Package:/) { package=$2 } else if ($0 ~ /^Status: .* installed$/) { print package }}')
            # init script rewrites
            check=$(echo $check | sed "
                    # The name of proftpd-{ldap,mysql,pgsql,basic} init script is
                    # same as "proftpd".
                    s/proftpd-.*/proftpd/g;
                    # dovecot-core ships its init script, but the
                    # script name is dovecot for dovecot-{imapd,pop3d}.
                    s/dovecot-core/dovecot/g;
                    # openssh-server's init script it called ssh
                    s/openssh-server/ssh/g;
                    # bacula-director-common's init is bacula-director
                    s/bacula-director-common/bacula-director/g;
                    # citadel server
                    s/citadel-server/citadel/g;
                    # collectd
                    s/collectd-core/collectd/g;
                    # cyrus
                    s/cyrus-common/cyrus-imapd/g;
                    # nginx
                    s/nginx-common/nginx/g;
              ")
            echo "done."
	fi
	if dpkg --compare-versions "$2" lt 1.1.1-1ubuntu2.1~18.04.2; then
            echo -n "Checking for services that may need to be restarted..."
            check2="chef chef-expander chef-server-api"
            check2="$check2 chef-solr pound postgresql-common"
            check2="$check2 prosody puppet puppetmaster snmpd"

            # Only get the ones that are installed, and configured
            check2=$(dpkg -s $check2 2> /dev/null | egrep '^Package:|^Status:' | awk '{if ($1 ~ /^Package:/) { package=$2 } else if ($0 ~ /^Status: .* installed$/) { print package }}')
            # init script rewrites
            check2=$(echo $check2 | sed -r "
                    s/chef\s/chef-client/g;
                    s/chef-server-api/chef-server/g;
                    s/postgresql-common/postgresql/g;
              ")
            echo "done."
            if [ -n "$check2" ]; then
                check="$check $check2"
            fi
       fi

       if [ -n "$check" ]; then
            db_version 2.0
	    echo "Checking init scripts..."
	    for service in $check; do
		if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
		   idl=$(ls /etc/init.d/${service} 2> /dev/null | head -n 1)
		   if [ -n "$idl" ] && [ -x $idl ]; then
			services="$service $services"
		   else
			echo "WARNING: init script for $service not found."
		   fi
		else
		    if [ -f /usr/share/file-rc/rc ] || [ -f /usr/lib/file-rc/rc ] && [ -f /etc/runlevel.conf ]; then

			idl=$(filerc $rl $service)
		    else
			idl=$(ls /etc/rc${rl}.d/S??${service} 2> /dev/null | head -n 1)
		    fi
		    if [ -n "$idl" ] && [ -x $idl ]; then
		        services="$service $services"
		    fi
		fi
	    done
	    if [ -n "$services" ]; then
		db_input critical libraries/restart-without-asking || true
		db_go || true
		db_get libraries/restart-without-asking
		if [ "x$RET" != xtrue ]; then
			db_reset libssl1.1/restart-services
			db_set libssl1.1/restart-services "$services"
			if [ "$RELEASE_UPGRADE_MODE" = desktop ]; then
			    db_input medium libssl1.1/restart-services || true
			else
			    db_input critical libssl1.1/restart-services || true
			fi
			db_go || true
			db_get libssl1.1/restart-services

			if [ "x$RET" != "x" ]
			then
				services=$RET
				answer=yes
			else
				answer=no
			fi
		else
			answer=yes
		fi
		echo
		if [ "$answer" = yes ] && [ "$services" != "" ]; then
		    echo "Restarting services possibly affected by the upgrade:"
		    failed=""
		    rl=$(runlevel | sed 's/.*\ //')
		    for service in $services; do
			if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
			    idl="invoke-rc.d ${service}"
			elif [ -f /usr/share/file-rc/rc ] || [ -f /usr/lib/file-rc/rc ] && [ -f /etc/runlevel.conf ]; then
			    idl=$(filerc $rl $service)
			else
			    idl=$(ls /etc/rc${rl}.d/S??${service} 2> /dev/null | head -n 1)
			fi

			if ! $idl restart; then
			    failed="$service $failed"
			fi
		    done
		    echo
		    if [ -n "$failed" ]; then
			db_subst libssl1.1/restart-failed services "$failed"
			db_input critical libssl1.1/restart-failed || true
			db_go || true
		    else
			echo "Services restarted successfully."
		    fi
		    echo
		fi
	    else
		echo "Nothing to restart."
	    fi
	    # Shut down the frontend, to make sure none of the
	    # restarted services keep a connection open to it
	    db_stop

	fi # end upgrading and $2 lt 0.9.8c-2

	# Here we issue the reboot notification for upgrades and
	# security updates. We do want services to be restarted when we
	# update for a security issue, but planned by the sysadmin, not
	# automatically.

	# Only issue the reboot notification for servers; we proxy this by
	# testing that the X server is not running (LP: #244250)
	if ! pidof /usr/lib/xorg/Xorg > /dev/null && [ -x /usr/share/update-notifier/notify-reboot-required ]; then
		/usr/share/update-notifier/notify-reboot-required
	fi

    fi # Upgrading
fi