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 u in $(grep "^admin:" /etc/group | sed -e "s/^.*://" -e "s/,/ /g"); do
        adduser "$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
}


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"

    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
}


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 $2 ]; then
	if [ ! -e /etc/libvirt/qemu/networks/autostart/default.xml ]; then
            ln -s /etc/libvirt/qemu/networks/default.xml \
                /etc/libvirt/qemu/networks/autostart/
	fi
    elif [ -e "$EXISTED" ]; then
    	rm -f "$EXISTED"
	if [ ! -e /etc/libvirt/qemu/networks/autostart/default.xml ]; then
		ln -s /etc/libvirt/qemu/networks/default.xml \
		    /etc/libvirt/qemu/networks/autostart/
	fi
    elif [ $2 = "0.9.7-2ubuntu6" -o $2 = "0.9.7-2ubuntu5" -o \
           $2 = "0.9.7-2ubuntu4" -o $2 = "0.9.7-2ubuntu3" ]; then
        # This particular check can be removed at first upload to precise+1.
	if [ ! -e /etc/libvirt/qemu/networks/autostart/default.xml ]; then
            ln -s /etc/libvirt/qemu/networks/default.xml \
                /etc/libvirt/qemu/networks/autostart/
        fi
    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 [ -e "/etc/init/libvirt-bin.conf" ]; then
	invoke-rc.d libvirt-bin start || exit $?
fi
# End automatically added section


# 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
fi

exit 0
libvirt-bin 0.9.8-2ubuntu17 / postinst
