#!/bin/bash
# postinst script for core-agent-linux
#
# see: dh_installdeb(1)

set -e

# The postinst script may be called in the following ways:
#   * <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
# https://www.debian.org/doc/debian-policy/ch-maintainerscripts.html or
# the debian-policy package


debug() {
    if [ "${DEBDEBUG}" == "1" ]; then
        echo -e ""$@""
    fi
}

systemdPreload() {
    # Debian systemd helper does not yet honour preset, therefore use
    # systemctl preset on each unit file (not using preset-all either since
    # wheezy does not support it) listed in 75-qubes-vm.preset.

    systemctl --no-reload preset-all > /dev/null 2>&1 && PRESET_FAILED=0 || PRESET_FAILED=1

    # Mask any static unit files that are marked to be disabled
    grep '^[[:space:]]*[^#;]' /lib/systemd/system-preset/75-qubes-vm.preset | while read action unit_name; do
        case "${action}" in
        disable)
            if [ -e "/lib/systemd/system/${unit_name}" ]; then
                if ! fgrep -q '[Install]' "/lib/systemd/system/${unit_name}"; then
                    deb-systemd-helper mask "${unit_name}" > /dev/null 2>&1 || true
                fi
            fi
            ;;
        *)
            # preset-all is not available in wheezy; so preset each unit file listed in 75-qubes-vm.preset
            if [ "${PRESET_FAILED}" -eq 1 ]; then
                systemctl --no-reload preset "${unit_name}" > /dev/null 2>&1 || true
            fi
            ;;
        esac
    done

    systemctl daemon-reload
}

installSerialConf() {
    debug "Installing over-ridden serial.conf init script..."
    if [ -e /etc/init/serial.conf ]; then
        cp /usr/share/qubes/serial.conf /etc/init/serial.conf
    fi
}

case "${1}" in
    configure)
        # Initial installation of package only
        # ($2 contains version number on update; nothing on initial installation)
        if [ -z "${2}" ]; then

            debug "FIRST INSTALL..."
            # Location of files which contains list of protected files
            PROTECTED_FILE_LIST='/etc/qubes/protected-files.d'

            # ensure that hostname resolves to 127.0.1.1 resp. ::1 and that /etc/hosts is
            # in the form expected by qubes-sysinit.sh
            if ! grep -rq "^/etc/hostname$" "${PROTECTED_FILE_LIST}" 2>/dev/null; then
                for ip in '127\.0\.1\.1' '::1'; do
                    if grep -q "^${ip}\(\s\|$\)" /etc/hosts; then
                        sed -i "/^${ip}\s/,+0s/\(\s`hostname`\)\+\(\s\|$\)/\2/g" /etc/hosts || true
                        sed -i "s/^${ip}\(\s\|$\).*$/\0 `hostname`/" /etc/hosts || true
                    else
                        echo "${ip//\\/} `hostname`" >> /etc/hosts || true
                    fi
                done
            fi

            # remove hostname from 127.0.0.1 line (in debian the hostname is by default
            # resolved to 127.0.1.1)
            if ! grep -rq "^/etc/hosts$" "${PROTECTED_FILE_LIST}" 2>/dev/null; then
                sed -i "/^127\.0\.0\.1\s/,+0s/\(\s`hostname`\)\+\(\s\|$\)/\2/g" /etc/hosts || true
            fi

            chown user:user /home_volatile/user

            # Set default "runlevel"
            rm -f /etc/systemd/system/default.target
            ln -s /lib/systemd/system/multi-user.target /etc/systemd/system/default.target

            # Systemd preload-all
            systemdPreload

            # Maybe install overridden serial.conf init script
            installSerialConf
        fi

        debug "UPDATE..."
        # disable some Upstart services
        for init in plymouth-shutdown \
                    prefdm \
                    splash-manager \
                    start-ttys \
                    tty ; do
            dpkg-divert --divert /etc/init/${init}.conf.qubes-disabled --package qubes-core-agent --rename --add /etc/init/${init}.conf
        done
        dpkg-divert --divert /etc/init/serial.conf.qubes-orig --package qubes-core-agent --rename --add /etc/init/serial.conf

        # Remove old firmware updates link
        if [ -L /lib/firmware/updates ]; then
            rm -f /lib/firmware/updates
        fi

        if ! dpkg-statoverride --list /var/lib/qubes/dom0-updates >/dev/null 2>&1; then
            dpkg-statoverride --update --add user user 775 /var/lib/qubes/dom0-updates
        fi

        # Update Qubes App Menus
        /usr/lib/qubes/qubes-trigger-sync-appmenus.sh || true
        ;;

    abort-upgrade|abort-remove|abort-deconfigure)
        exit 0
        ;;

    triggered)
        for trigger in ${2}; do
            case "${trigger}" in

                /usr/share/applications)
                    debug "Updating Qubes App Menus..."
                    /usr/lib/qubes/qubes-trigger-sync-appmenus.sh || true
                    ;;

                # Install overridden serial.conf init script
                /etc/init/serial.conf)
                    installSerialConf
                    ;;

            esac
        done
        exit 0
        ;;

    *)
        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.

#DEBHELPER#

exit 0

# vim: set ts=4 sw=4 sts=4 et :