libvirt-bin 1.2.2-0ubuntu13 / postinst

#!/bin/sh
# postinst script for libvirt-bin
#
# see: dh_installdeb(1)

set -e

# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <postinst> `abort-remove'
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package

add_users_groups()
{
    if ! getent group libvirtd >/dev/null; then
        addgroup --system libvirtd
    fi

    # Add each admin user to the libvirtd group - for systems installed
    # before precise
    for u in $(getent group admin | sed -e "s/^.*://" -e "s/,/ /g"); do
        adduser "$u" libvirtd >/dev/null || true
    done

    # Add each sudo user to the libvirtd group
    for u in $(getent group sudo | sed -e "s/^.*://" -e "s/,/ /g"); do
        adduser "$u" libvirtd >/dev/null || true
    done

    # user and group libvirt runs qemu/kvm instances with
    if ! getent group kvm >/dev/null; then
        addgroup --quiet --system kvm
    fi
    if ! getent passwd libvirt-qemu >/dev/null; then
        adduser --quiet \
            --system \
            --ingroup kvm \
            --quiet \
            --disabled-login \
            --disabled-password \
            --home /var/lib/libvirt \
            --no-create-home \
            -gecos "Libvirt Qemu" \
            libvirt-qemu
    fi
    if ! getent passwd libvirt-dnsmasq >/dev/null; then
        adduser --quiet \
            --system \
            --ingroup libvirtd \
            --quiet \
            --disabled-login \
            --disabled-password \
            --home /var/lib/libvirt/dnsmasq \
            --no-create-home \
            -gecos "Libvirt Dnsmasq" \
            libvirt-dnsmasq
    fi
}

includes_virbr0addr() {
	viraddr="192.168.122.1"
	a=$1
	b=$2
	for n in `seq 1 4`; do
		aa=`echo $a | awk -F. '{ print $'$n' }'`
		cc=`echo $viraddr | awk -F. '{ print $'$n' }'`
		cmp=$((b/8))
		if [ $cmp -ge $n ]; then
			if [ $aa -ne $cc ]; then
				echo "false"
				return 
			fi
		elif [ $((cmp+1)) -ge $n ]; then
			# do we bother comparing partial (i.e. /25)?
			:
		else
			break
		fi
	done
	echo "true"
	return
}

set_autostart()
{
    if [ ! -e /etc/libvirt/qemu/networks/autostart/default.xml ]; then
        ln -s /etc/libvirt/qemu/networks/default.xml \
        /etc/libvirt/qemu/networks/autostart/
    fi
}

# on first install, don't set default network to autostart if we already
# have a 192.168.122.0 network.  Good for instance for nested libvirt.
maybe_set_autostart()
{
    # don't autostart virbr0 if 192.168.122.1/24 already exists
    found=0
    for pair in `ip addr show | grep "inet\>" |awk '{ print $2 }'`; do
        a=`echo $pair | awk -F/ '{ print $1}'`
        m=`echo $pair | awk -F/ '{ print $2}'`
        res=`includes_virbr0addr $a $m`
        if [ $res = "true" ]; then
            found=1
        fi
    done
    if [ $found -eq 1 ]; then
        return
    fi
    set_autostart
}

add_statoverrides()
{
    ROOT_DIRS="\
        /var/lib/libvirt/images/ \
        /var/lib/libvirt/boot/   \
        /var/cache/libvirt/      \
    "

    QEMU_DIRS="\
         /var/lib/libvirt/qemu/   \
         /var/cache/libvirt/qemu/ \
    "

    SANLOCK_DIR="/var/lib/libvirt/sanlock"
	QEMU_CONF="/etc/libvirt/qemu.conf"

    for dir in ${ROOT_DIRS}; do
        if ! dpkg-statoverride --list "${dir}" >/dev/null 2>&1; then
            chown root:root "${dir}"
            chmod 0711 "${dir}"
        fi
    done

    for dir in ${QEMU_DIRS}; do
        if ! dpkg-statoverride --list "${dir}" >/dev/null 2>&1; then
            chown libvirt-qemu:kvm "${dir}"
            chmod 0750 "${dir}"
        fi
    done

    if ! dpkg-statoverride --list "${SANLOCK_DIR}" >/dev/null 2>&1; then
        chown root:root "${SANLOCK_DIR}"
        chmod 0700 "${SANLOCK_DIR}"
    fi

	if ! dpkg-statoverride --list "${QEMU_CONF}" >/dev/null 2>&1; then
		chown root:root "${QEMU_CONF}"
		chmod 0600 "${QEMU_CONF}"
	fi
}


case "$1" in
    configure)
        add_users_groups
        add_statoverrides

	# libvirt from 0.6.0 on is safe to restart with running vms:
	if [ -n "$2" ] &&  dpkg --compare-versions "$2" ge 0.6.0; then
	    if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
                invoke-rc.d libvirt-bin stop
            else
                /etc/init.d/libvirt-bin stop
            fi
	    sleep 1
	fi

	if dpkg --compare-versions "$2" lt "0.6.1-2"; then
	    if [ -e /etc/rc2.d/S20libvirt-bin ] && \
	       [ -e /etc/rc3.d/S20libvirt-bin ] && \
	       [ -e /etc/rc4.d/S20libvirt-bin ] && \
	       [ -e /etc/rc5.d/S20libvirt-bin ] && \
	       [ -e /etc/rc0.d/K20libvirt-bin ] && \
	       [ -e /etc/rc1.d/K20libvirt-bin ] && \
	       [ -e /etc/rc6.d/K20libvirt-bin ]; then
		update-rc.d -f libvirt-bin remove >/dev/null
	    fi
	fi

    for p in usr.sbin.libvirtd usr.lib.libvirt.virt-aa-helper ; do
        profile="/etc/apparmor.d/$p"
        if [ -f "$profile" ] && aa-status --enabled 2>/dev/null; then
            apparmor_parser -r "$profile" || true
        fi
    done

	# Make sure the directories don't get removed on package removal since
	# logrotate chokes otherwise.
	for dir in qemu uml lxc; do
	    touch /var/log/libvirt/"${dir}"/.placeholder
	done

    # 1. On an initial package install, create the default network autostart
    #    symlink.
    # 2. If the default.xml existed before upgrade, make sure it is recreated.
    #    This won't be a problem on most upgrades, but when upgrading from a
    #    version where the symlink came with the package, it will.
    # 3. If upgrading from one of the bad libvirt versions which deleted the
    #    symlink wrongly, recreate it
    EXISTED="/etc/libvirt/qemu/networks/autostart/TMP_defaultexisted"
    if [ -z $2 ]; then
    	maybe_set_autostart
    elif [ -e "$EXISTED" ]; then
        # on upgrade, if default network was previously autostarted,
	# continue to do so.
    	rm -f "$EXISTED"
	set_autostart
    fi

    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

# Automatically added by dh_installinit
if [ -x "/etc/init.d/libvirt-bin" ] || [ -e "/etc/init/libvirt-bin.conf" ]; then
	if [ ! -e "/etc/init/libvirt-bin.conf" ]; then
		update-rc.d libvirt-bin defaults >/dev/null
	fi
	invoke-rc.d libvirt-bin start || exit $?
fi
# End automatically added section
# Automatically added by dh_installinit
update-rc.d -f libvirt-bin remove >/dev/null || exit $?
# End automatically added section


# We need this after the debhelper generated code so that dpkg-maintscript
# can do its renamming first.
if [ "$1" = "configure" ]; then
    # The dnsmasq hook has been introduced through SRU into Ubuntu 12.04
    # and Ubuntu 12.10.
    #
    # This means that even though we version-guard the maintscripts entry
    # it'll fire multiple times for users doing 12.04 => 12.10 => 13.04
    # or even just 12.10 => 13.04.
    #
    # As there's unfortunately no way to specify per-series base versions
    # for maintscripts hooks, we let it fire multiple times and then fix up
    # the mess it creates.
    #
    # This migration code can be removed after Ubuntu 14.04 LTS is released.
    if [ -L /etc/dnsmasq.d-available/libvirt-bin ] &&
       [ "$(readlink /etc/dnsmasq.d-available/libvirt-bin)" = "/etc/dnsmasq.d-available/libvirt-bin" ] &&
       [ -e /etc/dnsmasq.d-available/libvirt-bin.dpkg-new ]; then
        echo "The dnsmasq configuration has been migrated twice, fixing it."
        mv /etc/dnsmasq.d-available/libvirt-bin /etc/dnsmasq.d/libvirt-bin
        mv /etc/dnsmasq.d-available/libvirt-bin.dpkg-new /etc/dnsmasq.d-available/libvirt-bin

        # Try to restart a potential system wide dnsmasq
        invoke-rc.d dnsmasq restart 2>/dev/null || true
    fi

    # Configure dnsmasq
    if [ -f /etc/dnsmasq.d-available/libvirt-bin ]; then
        echo "Setting up libvirt-bin dnsmasq configuration."
        mkdir -p /etc/dnsmasq.d
        if [ ! -e /etc/dnsmasq.d/libvirt-bin ]; then
            ln -s /etc/dnsmasq.d-available/libvirt-bin /etc/dnsmasq.d/libvirt-bin
        fi

        # Try to restart a potential system wide dnsmasq
        invoke-rc.d dnsmasq restart 2>/dev/null || true
    fi
fi
# This must run after libvirt-bin has started
if [ "$1" = "configure" ]; then
    if dpkg --compare-versions "$2" lt-nl "0.8.3-1ubuntu1" ; then
        libvirt-migrate-qemu-disks -a || true
    fi
    libvirt-migrate-xend-managed-domains || true
fi

exit 0