Synnefo » snf-image

#!/bin/bash

# Copyright 2011 GRNET S.A. All rights reserved.

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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

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. @commondir@/common.sh

set -e

set -o pipefail

if [ "x$1" != "x--force" ]; then

    echo "WARNING: Exiting, this command would cause the system to halt." >&2

    echo "Use --force if you know what you're doing." >&2

    exit 1

fi

# terminate helper vm when the script exits

add_cleanup telinit 0

if [ ! -b "$FLOPPY_DEV" ]; then

    log_error "Floppy device is not present!"

fi

floppy=$(mktemp -d --tmpdir floppy.XXXXXX)

add_cleanup rmdir "$floppy"

mount $FLOPPY_DEV $floppy

add_cleanup umount "$floppy"

if [ -f "$floppy/rules" ]; then

    source "$floppy/rules"

else

    log_error "Floppy does not contain \`rules\' file"

fi

if [ -n "$SNF_IMAGE_PROPERTIES" ]; then

    properties=$(mktemp --tmpdir properties.XXXXXX)

    add_cleanup rm "$properties"

    echo "SNF_IMAGE_PROPERTIES" |

        "@scriptsdir@/snf-decode-properties.py" > "$properties"

    source "$properties"

else

    log_error "SNF_IMAGE_PROPERTIES variable is missing"

fi

# Image mount point...

target=$(mktemp -d --tmpdir target.XXXXXX)

add_cleanup rmdir "$target"

export SNF_IMAGE_TARGET="$target"

export SNF_IMAGE_ROOTDEV="${SNF_IMAGE_DEV}${SNF_IMAGE_ROOT}"

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 something goes wrong with the tasks, try to umount the target filesystem

# in case it is left mounted...

trap '{ umount "$target"; }' ERR

if [ -z "$SNF_IMAGE_EXCLUDE_ALL_TASKS" ]; then

    # 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 IFS= read -r line; do

            echo $(date +%Y:%m:%d-%H:%M:%S.%N) "$line"

        done

fi

# Disable the trap. If code reaches here, the filesystem is unmounted.

trap - ERR

echo "SUCCESS" > "$RESULT"

cleanup

trap - EXIT

# never called...

exit 0

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