#!/bin/sh
set -e
export LC_ALL=C

type=$1
preversion=$2

# 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 ""
}

checkpkgver () {
    local status pkg
    pkg=$1
    status=$(dpkg -s $pkg 2>/dev/null | grep ^Status: | sed -e 's/^Status: \(.*\) \(.*\) \(.*\)/\3/g')
    if [ -n "$status" ] && [ "$status" != "not-installed" ] && [ "$status" != "config-files" ]; then
	echo $(dpkg -s $pkg 2>/dev/null | grep ^Version: | sed -e 's/^Version: *//');
    fi
}

if [ "$type" = "configure" ]
then
    # We don't use a registry anymore, remove the old file
    rm -f /etc/ld.so.hwcappkgs
 
    # /etc/ld.so.nohwcap code:
        # Handle upgrades when libc-opt package has been installed.
    # When a /etc/ld.so.nohwcap file exists, ld.so only use libraries
    # from /lib, and ignore all optimised libraries. This file is
    # inconditionaly created in the preinst script of libc.
 
    # We check the version between the current installed libc and
    # all optimized packages. Due to multiarch, this has to be done
    # independently of the architecture of the package.
    all_upgraded=yes
    for pkg in libc6.1-alphaev67 libc6-i686 libc6-xen libc0.1-i686 ; do
        ver=$(dpkg-query -l $pkg 2>/dev/null | sed -e '/^[a-z][a-z]\s/!d;/^.[nc]/d;' -e "s/^..\s\+$pkg[0-9a-z:]*\s\+//;s/\s.*//g")
        if [ -n "$ver" ] && [ "$ver" != "2.24-11+deb9u4" ]; then
            all_upgraded=no
        fi
    done

    # If the versions of all optimized packages are the same as the libc
    # one, we could remove /etc/ld.so.nohwcap. Otherwise, it will be removed
    # when all optimized packages are upgraded or removed.
    if [ "$all_upgraded" = yes ] ; then
        rm -f /etc/ld.so.nohwcap
    fi


    # Load debconf module if available
    if [ -f /usr/share/debconf/confmodule ] ; then
	. /usr/share/debconf/confmodule
    fi

    if [ -n "$preversion" ] && [ -x "$(which ischroot)" ] && ! ischroot; then
	if dpkg --compare-versions "$preversion" lt 2.24; then
	    check="apache2.2-common apache apache-ssl apache-perl autofs at"
	    check="$check boa cucipop courier-authdaemon cron cups exim"
	    check="$check exim4-base dovecot-common cucipop incron lprng lpr"
	    check="$check lpr-ppd mysql-server nis openbsd-inetd"
	    check="$check openldapd postgresql-common proftpd postfix postfix-tls"
	    check="$check rsync samba sasl2-bin slapd smail sendmail snmpd ssh"
	    check="$check spamassassin vsftpd wu-ftpd wu-ftpd-academ wwwoffle"
	    check="$check webmin dropbear gdm"
	    # NSS services check: 
	    	    echo -n "Checking for services that may need to be restarted..."
	    # 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 }}')
	    # some init scripts don't match the package names
	    check=$(echo $check | \
	    	    sed -e's/\bapache2.2-common\b/apache2/g' \
	    	    	-e's/\bat\b/atd/g' \
	    	    	-e's/\bdovecot-common\b/dovecot/g' \
	    	    	-e's/\bexim4-base\b/exim4/g' \
	    	    	-e's/\blpr\b/lpd/g' \
	    	    	-e's/\blpr-ppd\b/lpd-ppd/g' \
	    	    	-e's/\bmysql-server\b/mysql/g' \
	    	    	-e's/\bsasl2-bin\b/saslauthd/g' \
	    	    	-e's/\bpostgresql-common\b/postgresql/g' \
	    )
	    echo
	    echo "Checking init scripts..."
	    rl=$(runlevel | sed 's/.*\ //')
	    for service in $check; do
	    	if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
	    	    invoke-rc.d ${service} status >/dev/null 2>/dev/null && status=0 || status=$?
	    	    if [ "$status" = "0" ] || [ "$status" = "2" ] ; then
	    	    	services="$service $services"
	    	    elif [ "$status" = "100" ] ; then
	    	    	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 -1)
	    	    fi
	    	    if [ -n "$idl" ] && [ -x $idl ]; then
	    	    	services="$service $services"
	    	    fi
	    	fi
	    done

	    if [ -n "$services" ]; then

	        if [ -f /usr/share/debconf/confmodule ] ; then
		    db_version 2.0
		    db_input critical libraries/restart-without-asking || true
		    db_go || true
		    db_get libraries/restart-without-asking
		    if [ "$RET" != true ]; then
			db_reset glibc/restart-services
			db_set glibc/restart-services "$services"
			db_input critical glibc/restart-services || true
			db_go || true
			db_get glibc/restart-services
			if [ "x$RET" != "x" ]
			then
			    services="$RET"
			else
			    services=""
			fi
		    fi
		else
		    echo
		    echo "Name Service Switch update in the C Library: post-installation question."
		    echo
		    echo "Running services and programs that are using NSS need to be restarted,"
		    echo "otherwise they might not be able to do lookup or authentication any more"
		    echo "(for services such as ssh, this can affect your ability to login)."
		    echo "Note: restarting sshd/telnetd should not affect any existing connections."
		    echo
		    echo "The services detected are: "
		    echo "        $services"
		    echo
		    echo "If other services have begun to fail mysteriously after this upgrade, it is"
		    echo "probably necessary to restart them too.  We recommend that you reboot your"
		    echo "machine after the upgrade to avoid NSS-related troubles."
		    echo
		    frontend=`echo "$DEBIAN_FRONTEND" | tr '[:upper:]' '[:lower:]'`
		    if [ "$frontend" = noninteractive ]; then
		    	echo "Non-interactive mode, restarting services"
		    	answer=yes
		    else
		    	echo -n "Do you wish to restart services? [Y/n] "
		    	read answer
		    	case $answer in
			    N*|n*) services="" ;;
			    *) ;;
		        esac
		    fi
		fi
		echo
		if [ "$services" != "" ]; then
		    echo "Restarting services possibly affected by the upgrade:"
		    failed=""
		    for service in $services; do
			# We can't just use a generic rewrite here, as it was
			# samba in wheezy and smbd in jessie, which confuses.
			if [ "$service" = "samba" ]; then
			    if [ -x /etc/init.d/smbd ] || [ -f /etc/init/smbd ]; then
				service="smbd"
			    fi
			fi
		    	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 -1)
			fi
			case "$service" in
			    gdm)
				echo -n "  $service: reloading..."
				if $idl reload > /dev/null 2>&1; then
				    echo "done."
				else
				    echo "FAILED! ($?)"
				    failed="$service $failed"
				fi
				;;
			    *)
				echo -n "  $service: restarting..."
				if $idl restart > /dev/null 2>&1; then
				    echo "done."
				else
				    echo "FAILED! ($?)"
				    failed="$service $failed"
				fi
				;;
			esac
		    done
		    echo
		    if [ -n "$failed" ]; then
	        	if [ -f /usr/share/debconf/confmodule ] ; then
		    	    db_fset glibc/restart-failed seen false
			    db_subst glibc/restart-failed services "$failed"
			    db_input critical glibc/restart-failed || true
			    db_go || true
			else
			    echo "The following services failed to start: $failed"
			    echo
			    echo "You will need to start these manually by running \`/etc/init.d/<service> start'"
			    echo "If the service still fails to start, you may need to file a bug on"
			    echo "${DPKG_MAINTSCRIPT_PACKAGE}:${DPKG_MAINTSCRIPT_ARCH} or the service involved."
			    frontend=`echo "$DEBIAN_FRONTEND" | tr '[:upper:]' '[:lower:]'`
			    if [ "$frontend" != noninteractive ]; then
			    	echo
			    	echo -n "Press ENTER to continue: "
			    	read foo
			    fi
			fi
		    else
			echo "Services restarted successfully."
                    fi
		fi
                # Shut down the frontend, to make sure none of the
		# restarted services keep a connection open to it
	        if [ -f /usr/share/debconf/confmodule ] ; then
		    db_stop
		fi
	    else
		echo "Nothing to restart."
	    fi
	fi # end upgrading and $preversion lt 2.24
    fi # Upgrading

    # Restart init.  Currently handles chroots, systemd and upstart, and
    # assumes anything else is going to not fail at behaving like
    # sysvinit:
    TELINIT=yes
    if ischroot 2>/dev/null; then
        # Don't bother trying to re-exec init from a chroot:
        TELINIT=no
    elif [ -d /run/systemd/system ]; then
        # Skip if systemd is the active PID 1, since systemd doesn't
        # need a reexec for a clean shutdown
        TELINIT=no
    elif [ -x "`which initctl`" ]; then
        UPSTART=$(initctl version 2>/dev/null | awk '/upstart/ {print $3}' | tr -d ')')
        if dpkg --compare-versions "$UPSTART" lt-nl 1.6.1; then
            # This is an old upstart that can't re-exec statefully:
            TELINIT=no
            touch /var/run/init.upgraded
        fi
    fi
    if [ "$TELINIT" = "yes" ]; then
        telinit u 2>/dev/null || true ; sleep 1
    fi
fi

# We now use the multiarch triplet instead of the GNU triplet for the ld.so
# configuration file, in order to keep a stable path. Remove the old file.
case ${DPKG_MAINTSCRIPT_ARCH:-$(dpkg --print-architecture)} in
    hurd-i386)
        dpkg-maintscript-helper rm_conffile /etc/ld.so.conf.d/i486-gnu.conf 2.19-11~ libc0.3:hurd-i386 -- "$@"
        dpkg-maintscript-helper rm_conffile /etc/ld.so.conf.d/i486-gnu-gnu.conf 2.19-11~ libc0.3:hurd-i386 -- "$@"
        ;;
    i386)
        dpkg-maintscript-helper rm_conffile /etc/ld.so.conf.d/i486-linux-gnu.conf 2.19-4~ libc6:i386 -- "$@"
        ;;
    kfreebsd-i386)
        dpkg-maintscript-helper rm_conffile /etc/ld.so.conf.d/i486-kfreebsd-gnu.conf 2.19-11~ libc0.1:kfreebsd-i386 -- "$@"
        ;;
esac



exit 0