tusportal.tus.k12.pa.us/tusportal.tus.k12.pa.us.tar/tusportal.tus.k12.pa.us/Wyse/latest-image.raw/0.img/usr/sbin/thinclient-include

Text File | 2012-08-08 | 5KB | 201 lines

#======================================
# importFile
#--------------------------------------
function importFile {
    # /.../
    # import the config.<MAC> style format. the function
    # will export each entry of the file as variable into
    # the current shell environment
    # ----
    IFS="
    "
    while read line;do
        [ "x${line:0:1}" = "x#" ] && continue
        key=`echo "$line" | cut -d '=' -f1`
        item=`echo "$line" | cut -d '=' -f2- | tr -d "\'" | tr -d "\""`
        if [ -z "$key" ] || [ -z "$item" ];then
            continue
        fi
        eval export "$key\=\"$item\""
    done
}

function LocalUpdate ()
{
    echo $UPDATE_URL | grep "^file:///" > /dev/null
    return $?
}

function getLocalsrcPatch ()
{
    echo $1 | sed "s#^file://##g"
}

function fetch ()
{
    src=$1
    dest=$2

    if LocalUpdate; then
        localsrcpatch=`getLocalsrcPatch $src`
        cp $localsrcpatch $dest
        retval=$?
    else
        local CURL_OPTIONS
        local CURL_TIMEOUT=$(/usr/sbin/thinclient-config --get-curl-timeout)
        if [ -n "$CURL_TIMEOUT" ]; then
            CURL_OPTIONS=( --connect-timeout $CURL_TIMEOUT )
        else
            CURL_OPTIONS=( --connect-timeout 10 )
        fi
        if [ "$UPDATE_REQUIRES_AUTH" = "yes" ]; then
            UPDATE_USER=$(/usr/sbin/thinclient-config --get-update-user)
            UPDATE_PASSWORD=$(/usr/sbin/thinclient-config --get-update-password)
            CURL_OPTIONS+=( -u "$UPDATE_USER:$UPDATE_PASSWORD" )
        fi

        curl -g -k -f "${CURL_OPTIONS[@]}" -o $dest -# $src 2>&1
        retval=$?
    fi

    return $retval
}

function fetchAddonDirectory ()
{
    directoryUrl="${ADDONS_URL}/directory"
    directoryFile=`mktemp`

    if ! fetch $directoryUrl $directoryFile >/dev/null 2>&1; then
        echo "Failed to download add-on directory file" >> /dev/stderr
        return 1
    fi

    dos2unix --quiet $directoryFile
    echo $directoryFile
}

function getRpmName()
{
    echo $1 | sed "s/\(.*\)-\(.*\)-\(.*\)\..*\.rpm/\\1/"
}

function getRpmVersion()
{
    echo $1 | sed "s/\(.*\)-\(.*\)-\(.*\)\..*\.rpm/\\2-\\3/"
}

function isAddonAvailable ()
{
    name=$1
    availableName=`getRpmName $name`

    installedVersion=`rpm -q --queryformat "%{VERSION}-%{RELEASE}\n" $availableName 2>/dev/null`
    if [ -z "$installedVersion" ]; then
        echo "WARNING: Unable to determine version for '$availableName'" >/dev/stderr
        return 1
    fi

    availableVersion=`getRpmVersion $name`
    if [ -z "$availableVersion" ]; then
        echo "WARNING: Unable to determine version for '$name'" >/dev/stderr
        return 1
    fi

    if [ "$availableVersion" = "$installedVersion" ]; then
        return 1
    fi

    return 0
}

function NeedImageUpdate()
{
    LATEST_IMAGE_PATH="/latest-image.raw"
    LATEST_IMAGE_INFO_PATH="${LATEST_IMAGE_PATH}.info"
    infoFile="/tmp/image-info"
    if ! fetch "${UPDATE_URL}/${LATEST_IMAGE_INFO_PATH}" $infoFile >/dev/null 2>&1; then
        # Failed to download latest image information
        return 1
    fi

    importFile < $infoFile
    if [ -z "$IMAGE_VERSION_HASH" ]; then
        # Failed to get available image version hash
        return 1
    elif [ -z "$IMAGE_SIZE" ]; then
        # WARNING: Failed to get available image size
        return 1
    elif [ -z "$IMAGE_MD5SUM" ]; then
        # Failed to get available image MD5 sum
        return 1
    fi

    currentHash=`cat /read-only/.profile | grep versionHash | sed -e "s/versionHash=\(.*\)/\\1/" 2>/dev/null`
    if [ "$IMAGE_VERSION_HASH" != "$currentHash" ]; then
        # no need to do more check if version is not same
        return 0
    fi

    if [ ! -f /read-write/.raw.info ] ; then
        # no info file, no update
        return 1
    fi

    currentRawHash=`cat /read-write/.raw.info | grep IMAGE_VERSION_HASH | cut -d'=' -f2 2>/dev/null`
    currentRawMD5=`cat /read-write/.raw.info | grep IMAGE_MD5SUM | cut -d'=' -f2 2>/dev/null`

    # info file corrupt?
    [ "$currentRawHash" = "$currentHash" -a "$IMAGE_MD5SUM" != "$currentRawMD5" ]
    return $?
}

function NeedAddonUpdate()
{
    ADDONS_URL="${UPDATE_URL}/addons"
    if ! availableAddons=$(fetchAddonDirectory); then
        return 1
    fi
    installedAddons=`rpm -qa --queryformat "%{NAME}\n" 2>/dev/null`
    tmpFile=`mktemp`
    echo "$(echo "$installedAddons" | tr ' ' '\n')" > $tmpFile
    updatedAddons=`grep -Ff $tmpFile $availableAddons`
    rm -fr $tmpFile
    if [ -z "$updatedAddons" ]; then
        return 1
    fi
    for updatedAddon in $updatedAddons; do
        if ! isAddonAvailable $updatedAddon; then
            # No update for add-on '$installed' is available
            continue
        fi
        return 0
    done
    return 1
}

function NeedUpdate()
{
. /etc/sysconfig/thinclient
    if [ -z "$UPDATE_URL" ]; then
        # No update url is specified.
        return 1
    fi
    if [ -z "$UPDATE_MODE" ]; then
        # No update mode is specified.
        return 1
    fi
    if [ x"$FORCE_IMAGE_UPDATE" = xyes ]; then
        return 0
    fi
    if [ "$UPDATE_MODE" = "image" ] || [ "$UPDATE_MODE" = "both" ] && NeedImageUpdate; then
        return 0
    fi
    if [ "$UPDATE_MODE" = "addons" ] || [ "$UPDATE_MODE" = "both" ] && NeedAddonUpdate; then
        return 0
    fi
    return 1
}