update_engine/scripts/payload_apply.sh

#!/system/bin/sh

PAYLOAD=$1
HEADER_SIZE=512
HEADER_LINES=6
SIDELOAD_APP=`which update_engine_sideload`

if [ "$#" -ne 1 ]
then
    echo "$0 [PAYLOAD]"
    exit 1
fi

if [ -z $SIDELOAD_APP ]
then
    echo "Can't find update_engine_sideload app"
    exit 1
fi

if [ ! -f $PAYLOAD ]
then
    echo "$PAYLOAD does not exist"
    exit 1
fi

HEADER=`head -n $HEADER_LINES $PAYLOAD`
FILE_HASH=`echo $HEADER | awk -F"FILE_HASH:" '{print $2}' | awk '{print $1}'`
FILE_SIZE=`echo $HEADER | awk -F"FILE_SIZE:" '{print $2}' | awk '{print $1}'`
METADATA_SIZE=`echo $HEADER | awk -F"METADATA_SIZE:" '{print $2}' | awk '{print $1}'`

$SIDELOAD_APP --payload=file://$PAYLOAD --offset=$HEADER_SIZE --headers="FILE_HASH=$FILE_HASH
FILE_SIZE=$FILE_SIZE
METADATA_SIZE=$METADATA_SIZE
" || exit 1