Backup WhatsApp from NANDROID Hi guys: refering to this:
Restore Whatsapp

Get the same issue.

I just reset all my phone after an OTA bricked.

I made an nandroid backup, but, i dunno how to acces - on my phone - the "data/data/com.whatsapp" file to read owner and group.
I think for the nandroid its going to be ok.

Cheers
install WhatsApp, then boot in TWRP and look from adb shell


show the folder attributes with the ls command

ls -dln /data/data/com.whatsapp



example output:

mint@debian ~ $ adb shell
/ # ls -dln /data/data/com.whatsapp
drwx------   13 10104    10104         4096 Jan 15 04:15 /data/data/com.whatsapp  


next, restore the backup (or part of it)  


download open-gapps-pico.zip for your platform (ARM) to PC  
extract the tar binary (tar-arm for ARM) and push it to phone (in TWRP)  

adb push C:\adb\tar-arm /tmp/

open adb shell and make the binary executable (TWRP)  

chmod 0750 /tmp/tar-arm



example output:

mint@debian ~/Downloads $ adb push tar-arm /tmp/
387 KB/s (427448 bytes in 1.075s)
mint@debian ~/Downloads $ adb shell
/ # chmod 0750 /tmp/tar-arm 



in TWRP look for the location where your (internal/external) sdcard is mounted

df



example output:  

/ # df
Filesystem           1K-blocks      Used Available Use% Mounted on
tmpfs                  1010636        44   1010592   0% /dev
tmpfs                  1010636        28   1010608   0% /tmp
/dev/block/mmcblk0p19   253920      2380    246300   1% /cache
/dev/block/mmcblk0p20 11608792   9847780   1728244  85% /data
/dev/block/mmcblk0p20 11608792   9847780   1728244  85% /sdcard
/dev/block/mmcblk1p1  31150720  22588512   8562208  73% /external_sd



find the backup folder with the ls and cd commands


example output for cd change directory:

/ # cd /external_sd
/external_sd # cd TWRP
/external_sd/TWRP # cd BACKUPS/CUBOT_KING_KONG


example output for ls list files and folders:

/external_sd/TWRP/BACKUPS/CUBOT_KING_KONG # ls
2019-03-20--03-44-24_CUBOT_KING_KONG_7081C_V16_20180517
2019-04-16--08-03-32_CUBOT_KING_KONG_7081C_V16_20180517
2019-04-21--07-15-28_CUBOT_KING_KONG_7081C_V22_20181228
2019-06-18--20-30-44_CUBOT_KING_KONG_7081C_V16_20180517
2019-06-23--05-37-30_CUBOT_KING_KONG_7081C_V16_20180517
2019-06-26--08-30-17_du_s3ve3g-userdebug_712_NZH54D_engroot20180


enter the latest backup folder (you can also use * as wildcard)  

/external_sd/TWRP/BACKUPS/CUBOT_KING_KONG # cd 2019-06-26*


list ls the backup file names inside. the interesting is the data.ext4.win* backup

/external_sd/TWRP/BACKUPS/CUBOT_KING_KONG/2019-06-26--08-30-17_du_s3ve3g-userdebug_712_NZH54D_engroot20180 # ls
boot.emmc.win          data.ext4.win002       recovery.emmc.win.md5
boot.emmc.win.md5      data.ext4.win002.md5   recovery.log
data.ext4.win000       data.ext4.win003       system.ext4.win
data.ext4.win000.md5   data.ext4.win003.md5   system.ext4.win.md5
data.ext4.win001       data.info              system.info
data.ext4.win001.md5   recovery.emmc.win



Before unpacking, find the required file name(s) which contains your whatsapp files. use the tar-arm binary with parameters -t (test) and look into each file -f data.ext4.win*, while the error output is filtered out with 2&gt; /dev/null and the the file list is filtered for folder name /data/data/com.whatsapp with the grep command

/tmp/tar-arm -tf data.ext4.win000 2&gt; /dev/null | grep /data/data/com.whatsapp



example output: (no result for data.ext4.win000 data.ext4.win001 data.ext4.win002)

/external_sd/TWRP/BACKUPS/CUBOT_KING_KONG/2019-06-26--08-30-17_du_s3ve3g-userdebug_712_NZH54D_engroot20180 # /tmp/tar-arm -tf data.ext4.win000 2&gt; /dev/null | grep /data/data/com.whatsapp
/external_sd/TWRP/BACKUPS/CUBOT_KING_KONG/2019-06-26--08-30-17_du_s3ve3g-userdebug_712_NZH54D_engroot20180 # /tmp/tar-arm -tf data.ext4.win001 2&gt; /dev/null | grep /data/data/com.whatsapp
/external_sd/TWRP/BACKUPS/CUBOT_KING_KONG/2019-06-26--08-30-17_du_s3ve3g-userdebug_712_NZH54D_engroot20180 # /tmp/tar-arm -tf data.ext4.win002 2&gt; /dev/null | grep /data/data/com.whatsapp
/external_sd/TWRP/BACKUPS/CUBOT_KING_KONG/2019-06-26--08-30-17_du_s3ve3g-userdebug_712_NZH54D_engroot20180 # /tmp/tar-arm -tf data.ext4.win003 2&gt; /dev/null | grep /data/data/com.whatsapp
/data/data/com.whatsapp/
/data/data/com.whatsapp/cache/
/data/data/com.whatsapp/code_cache/
/data/data/com.whatsapp/lib
/data/data/com.whatsapp/app_minidumps/
^C



now you can extract the folder /data/data/com.whatsapp (as last argument) from the file(s) -f data.ext4.win003 with the tar-arm binary with -x and additional parameters --selinux --xattrs -p for file attributes, while -P will keep the leading / which will restore everything to /data and -v make the whole thing more visible for you. handle each data.ext4.win* file for its own:  

/tmp/tar-arm --selinux --xattrs -vxpPf data.ext4.win003 /data/data/com.whatsapp



example output:  

/external_sd/TWRP/BACKUPS/CUBOT_KING_KONG/2019-06-26--08-30-17_du_s3ve3g-userdebug_712_NZH54D_engroot20180 # /tmp/tar-arm --selinux --xattrs -vxpPf data.ext4.win003 /data/data/com.whatsapp
/data/data/com.whatsapp/
/data/data/com.whatsapp/cache/
/data/data/com.whatsapp/code_cache/
/data/data/com.whatsapp/lib
/data/data/com.whatsapp/app_minidumps/
^C


finally, change the owner and group

/ # chown -Rh 10104.10104 /data/data/com.whatsapp