Project to make BorgBackup run on Android.

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Robert Schade 2d154c2d38 Update README.md added note about selinux and virtualenv		2017-09-17 15:05:44 +02:00
borg.patch	initial commit	2017-07-29 22:44:05 +02:00
borg_ssh_wrapper	Use $* over $1..$8 in borg_ssh_wrapper	2017-07-30 17:30:24 +02:00
build.sh	Add +x to scripts	2017-07-30 17:30:20 +02:00
LICENSE	Initial commit	2017-07-29 16:58:11 +02:00
README.md	Update README.md	2017-09-17 15:05:44 +02:00

README.md

borgbackup on android

This project provides build scripts to compile borgbackup (https://github.com/borgbackup/borg) and its dependencies on Android. It uses termux (https://termux.com/) as a lightweight environment.

Yoou don't root permission on your phone to use it. However without root permissions the access to data of other apps or system data is not possible, but you can still access your photos, videos,...

If you have root permission on your device, you can use tsu (https://github.com/cswl/tsu) to conveniently gain root permissions in termux and backup you complete device.

How to use:

install termux from F-Droid or Google Play (https://termux.com/)
open app
run "apt update; apt install git"
run "git clone https://github.com/ravenschade/borgbackup_on_android.git"
set selinux to permissive (/system/bin/setenforce 1, otherwise virtualenv for python will not work properly)
run "cd borgbackup_on_android; bash build.sh"

Tested with:

termux 0.53
borg 1.0.12

Tested and working so far is:

creation of repositories
backup to repositories on the device
backup up to remote repositories via ssh

Tested and working on devices:

Huawei Nexus6p with stock Android 7.1.2 (angler, aarch64)
Samsung Galaxy Note 2 with Lineage 14.1 (n7100, armv7l)

Feedback on tests with other devices and android versions is very welcome.

Warning messages like

WARNING: linker: /data/data/com.termux/files/usr/lib/libacl.so.1.1.0: unused DT entry: type 0xf arg 0x449

are due to the Android linker. More details can be found at https://stackoverflow.com/questions/33206409/unused-dt-entry-type-0x1d-arg.

So all in all my Android backup setup looks like:

borg, termux and tasker
termux: Task (https://f-droid.org/packages/com.termux.tasker/) for tasker integration
tsu (modified so that it takes commands with -c): https://github.com/ravenschade/tsu
.termux/tasker/backup.sh:

#!/data/data/com.termux/files/usr/bin/bash
date
tsu -e -c "~/borgbackup_on_android/borg.sh"
date
read

~/borgbackup_on_android/borg.sh:

#!/data/data/com.termux/files/usr/bin/bash
t=`date +%d_%m_%Y`
export BORG_UNKNOWN_UNENCRYPTED_REPO_ACCESS_IS_OK=yes
export BORG_RELOCATED_REPO_ACCESS_IS_OK=yes
host=angler
dirs="/ /system /vendor /cache /persist /firmware /storage /data"
export BORG_RSH=borg_ssh_wrapper
source /data/data/com.termux/files/home/borgbackup_on_android/borg-env/bin/activate
borg create -C lz4 -p -v --stats --one-file-system backup:/backup/borg/$host::$t $dirs # 2> ~/borg_backup_${t}.err