snf-image-helper.in

#!/bin/bash

# Copyright (C) 2011-2015 GRNET S.A.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.

PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin

if [ $$ -eq 1 ]; then
    #mount / -o remount
    mount -t tmpfs -o size=20m tmpfs /tmp
    /etc/init.d/udev start
    #hwclock -u -s

    (exec $0) &
    wait
    exit 0 # Hopefully this is never called...
fi

export PATH

. @commondir@/common.sh

set -e

# Enable errtrace to make functions inherit the ERR trap
set -o errtrace

trap report_error ERR

if grep snf_image_activate_helper /proc/cmdline > /dev/null; then
    # terminate helper VM when the script exits
    add_cleanup system_poweroff
else
    log_error "Kernel command line activation flag: " \
              "\`snf_image_activate_helper' is missing"
fi

prepare_helper

if [ ! -b "$RULES_DEV" ]; then
    log_error "Device file hosting the rules file: \`$RULES_DEV' does not exist"
fi

rules=$(mktemp -d --tmpdir rules.XXXXXX)
add_cleanup rmdir "$rules"

$MOUNT $RULES_DEV $rules
add_cleanup umount "$rules"

if [ -f "$rules/rules" ]; then
    source "$rules/rules"
else
    log_error "$RULES_DEV does not contain \`rules\' file"
fi

if [ -f "$rules/unattend.xml" ]; then
    export SNF_IMAGE_UNATTEND="$rules/unattend.xml"
fi

if [ -n "$SNF_IMAGE_PROPERTIES" ]; then
    properties=$(mktemp --tmpdir properties.XXXXXX)
    add_cleanup rm "$properties"
    if ! echo "$SNF_IMAGE_PROPERTIES" | \
        "@scriptsdir@/decode-properties.py" "$properties"; then

        log_error "Unable to decode image properties. " \
             "Please check if the variable is in valid json format."
    fi
    source "$properties"
fi

# Image mount point...
target=$(mktemp -d --tmpdir target.XXXXXX)
add_cleanup rmdir "$target"

export SNF_IMAGE_TARGET="$target"

if [ ! -d "@tasksdir@" ]; then
    log_error "snf-image/tasks directory is missing"
fi

RUN_PARTS=$(which run-parts)
if [ -z "$RUN_PARTS" ]; then
    log_error "run-parts program is missing from the system"
fi

if ! check_yes_no SNF_IMAGE_PROPERTY_EXCLUDE_ALL_TASKS; then

    if [ "$SNF_IMAGE_PROPERTY_OSFAMILY" = "" -o "$SNF_IMAGE_PROPERTY_ROOT_PARTITION" = "" ]; then
        warn "Needed image properties are missing. Autodetecting them..."
        detect_image_properties "$SNF_IMAGE_DEV"

        if [ "$SNF_IMAGE_PROPERTY_OSFAMILY" = "" ]; then
            echo "Detected OSFAMILY: $DETECTED_OSFAMILY"
            export SNF_IMAGE_PROPERTY_OSFAMILY="$DETECTED_OSFAMILY"
        fi

        if [ "$SNF_IMAGE_PROPERTY_ROOT_PARTITION" = "" ]; then
            echo "Detected ROOT_PARTITION: $DETECTED_ROOT_PARTITION"
            export SNF_IMAGE_PROPERTY_ROOT_PARTITION="$DETECTED_ROOT_PARTITION"
        fi
    fi

    if [ "$SNF_IMAGE_PROPERTY_OSFAMILY" = "" ]; then
        log_error "Required image property \`OSFAMILY' is missing or empty."
    fi

    if [ "$SNF_IMAGE_PROPERTY_ROOT_PARTITION" = "" ]; then
        log_error "Required image property \`ROOT_PARTITION' is missing or empty."
    fi

    if [[ ! "$SNF_IMAGE_PROPERTY_OSFAMILY" =~ ^(linux|windows|freebsd|openbsd|netbsd)$ ]]; then
        log_error "Supported values for OSFAMILY property are: linux|windows|freebsd|openbsd|netbsd"
    fi

    SNF_IMAGE_RESIZE_PART="$(get_partition_to_resize "$SNF_IMAGE_DEV")"
    if [ -z "$SNF_IMAGE_RESIZE_PART" ]; then
        exit 0
    fi

    export SNF_IMAGE_RESIZE_PART

    # If something goes wrong with the tasks, try to umount the disk file
    # systems that are still mounted.
    trap '{ umount_all "$target"; }' ERR

    # Redirect standard error to standard output,
    # prepend a timestamp before each line of output.
    echo "Execute all snf-image tasks...."
    $RUN_PARTS -v --exit-on-error "@tasksdir@" 2>&1|
        while read -r line; do
            echo $($DATE +%Y:%m:%d-%H:%M:%S.%N) "$line"
        done

    # Reset the handler to its original value
    trap report_error ERR
else
    warn "EXCLUDE_ALL_TASKS is set. All configuration tasks were prevented from running."
fi


return_success

cleanup
trap - EXIT

# never called...
exit 0

# vim: set sta sts=4 shiftwidth=4 sw=4 et ai :