full-backup.sh

#!/bin/bash
# License; Apache-2
# anddisa@gmail.com 2019/12

curr_dir="$(dirname "$0")"
. "$curr_dir/functions.sh"

set -e   # fail early

use_adb_root=false
data_backup=true
media_backup=false
image_backup=false
extra_backup=false

if [[ $# -gt 0 ]]; then
    for param in $@; do
        case "$param" in
            help|-h|--help)
                echo "Makes a full backup over ADB"
                echo "tar /data, binary img /data block"
                exit 0
                ;;
            --data-backup)
                data_backup=true
                ;;
            --no-data-backup)
                data_backup=false
                ;;
            --media-backup)
                media_backup=true
                ;;
            --no-media-backup)
                media_backup=false
                ;;
            --image-backup)
                image_backup=true
                ;;
            --no-image-backup)
                image_backup=false
                ;;
            --extra-backup)
                extra_backup=true
                ;;
            --no-extra-backup)
                extra_backup=false
                ;;
            *)
                echo "Unknown argument $1"
                exit 1
                ;;
        esac
    done
fi

checkPrerequisites

updateBusybox

lookForAdbDevice

checkRootType

checkForCleanData

pushBusybox

mkBackupDir
pushd "$DIR"

stopRuntime

if $data_backup; then
    echo "Creating full tar backup of /data excluding /data/media"
    if [[ "$AS" == "$AROOT" ]]; then
    	$AS '/dev/busybox tar -cv -C /data --exclude="/data/media" --exclude="/data/mediadrm" . | gzip' | gzip -d | pv -trabi 1 | gzip -c9 > data.tar.gz
    else
    	$AS '"cd /data && /dev/busybox tar -czf - --exclude=media --exclude=mediadrm ./ 2>/dev/null"' | pv -trabi 1 > data.tar.gz
    fi
fi

if $media_backup; then
    echo "Creating full tar backup of /data/media"
    if [[ "$AS" == "$AROOT" ]]; then
    	$AS '/dev/busybox tar -cv -C /data/media . 2>/dev/null | gzip' | gzip -d | pv -trabi 1 | gzip -c9 > data_media.tar.gz
    	$AS '/dev/busybox tar -cv -C /data/mediadrm . 2>/dev/null | gzip' | gzip -d | pv -trabi 1 | gzip -c9 > data_mediadrm.tar.gz
    else
    	$AS '"cd /data/media && /dev/busybox tar -czf - ./ 2>/dev/null"' | pv -trabi 1 > data_media.tar.gz
    	$AS '"cd /data/mediadrm && /dev/busybox tar -czf - ./ 2>/dev/null"' | pv -trabi 1 > data_mediadrm.tar.gz
    fi
fi

if $image_backup; then
    echo "Creating image backup..."
    #get data image location
    PARTITION=$($AS mount | grep " /data " | cut -d ' ' -f1)
    echo "trying to get $PARTITION as data.img.gz"
    $AS "/dev/busybox dd if=$PARTITION bs=16777216 2>/dev/null | gzip" | gzip -d | pv -trabi 1 | gzip -c9 > data.img.gz

    echo "Verifying image backup..."
    echo -n "  Calculate checksum on device: "
    device_checksum="$($AS /dev/busybox sha256sum $PARTITION | cut -d ' ' -f1)"
    echo "$device_checksum"
    echo -n "  Calculate checksum locally: "
    local_checksum="$(gzip -d < data.img.gz | sha256sum | cut -d ' ' -f1)"
    echo "$local_checksum"

    if [ "$local_checksum" == "$device_checksum" ]; then
        echo "Checksums match."
    else
        echo -e "\033[1mChecksums don't match! $local_checksum != $device_checksum\033[0m"
    fi
fi

cleanup

startRuntime

popd # $DIR