There is an issue (at least) with Magisk Canary, as there are some permissions missig to execute the scripts on the device connected, but there is a workaround for this issue:

• call interactively adb shell
• change to rooted shell
• issue the following command:
  /sbin/magiskpolicy --live 'allow magisk_client adbd unix_stream_socket {read write ioctl}' 'allow magisk magisk_file sock_file {ioctl}' 'allow magisk_client adbd process {sigchld}' 'allow magisk_file sockfs filesystem {associate}' 'allow magisk_client vendor_file dir {read}' 'allow magisk_client shell_data_file dir {getattr read}' 'allow magisk_client system_data_file dir {getattr}' 'allow magisk_client postinstall_mnt_dir dir {getattr}' 'allow system_server magisk_file sock_file { read write }' 'allow system_server shell unix_stream_socket { getopt }' 'allow adbd oemfs dir { search }' 'allow adbd shell unix_stream_socket shutdown'

Now the scripts should run through as expected

full-restoring script could end without producing any effect

$` ./full-restore.sh --data-backup /mnt/hgfs/H/abb/qcom_2020-05-05_QKQ1.190828.002

Do you know why connection getting lost ?

Laptop:~/Downloads/platform-tools/android_backup_project-master$ ./backup_apps.sh
Cloning into 'busybox-ndk'...
remote: Enumerating objects: 475, done.
remote: Counting objects: 100% (32/32), done.
remote: Compressing objects: 100% (12/12), done.
remote: Total 475 (delta 21), reused 22 (delta 17), pack-reused 443
Receiving objects: 100% (475/475), 50.30 MiB | 20.61 MiB/s, done.
Resolving deltas: 100% (272/272), done.
Waiting for device...
Devices detected:
List of devices attached
99841d41 device

Checking for root access...

1. Requesting adbd as root...
   restarting adbd as root
   Waiting for device...
   root
   Determining architecture...
   Pushing busybox to device...
   busybox-ndk/busybox-arm64: 1 file pushed. 26.2 MB/s (1498688 bytes in 0.055s)

Creating dir qcom_2023-05-12_TQ2A.230505.002

then all the files

Stop Runtime

Pull apps

package:/data/app/6pU64UU5YEBnDm2dxL1BYw==/com.whatsapp-prT9_wZzOkPEcJ4ZEvbvOw==/base.apk=com.whatsapp
/data/app/6pU64UU5YEBnDm2dxL1BYw==/com.whatsapp-prT9_wZzOkPEcJ4ZEvbvOw==/base.apk
/data/app/6pU64UU5YEBnDm2dxL1BYw==/com.whatsapp-prT9_wZzOkPEcJ4ZEvbvOw==
com.whatsapp
96,2MiB 0:00:05 [8,56MiB/s] [19,2MiB/s]
gzip: stdin: unexpected end of file
97,0MiB 0:00:05 [18,8MiB/s] [18,8MiB/s]
error: no devices/emulators found

gzip: stdin: unexpected end of file
0,00 B 0:00:00 [0,00 B/s] [0,00 B/s]
package:/data/app/TvOkI3A-k55eIF-VMLraeA==/com.weawow-ezKRNHcn6g8jNFMclojZuA==/base.apk=com.weawow
/data/app/TvOkI3A-k55eIF-VMLraeA==/com.weawow-ezKRNHcn6g8jNFMclojZuA==/base.apk
/data/app/TvOkI3A-k55eIF-VMLraeA==/com.weawow-ezKRNHcn6g8jNFMclojZuA==
com.weawow
error: no devices/emulators found

gzip: stdin: unexpected end of file
0,00 B 0:00:00 [0,00 B/s] [0,00 B/s]
error: no devices/emulators found

gzip: stdin: unexpected end of file
0,00 B 0:00:00 [0,00 B/s] [0,00 B/s]
package:/data/app/NsiOLGB6o_RbaqpcXkvatQ==/com.google.android.deskclock-rWtvlVIDdzAJ10ZoRh_wig==/base.apk=com.google.android.deskclock
/data/app/NsiOLGB6o_RbaqpcXkvatQ==/com.google.android.deskclock-rWtvlVIDdzAJ10ZoRh_wig==/base.apk
/data/app/~~NsiOLGB6o_RbaqpcXkvatQ==/com.google.android.deskclock-rWtvlVIDdzAJ10ZoRh_wig==
com.google.android.deskclock
error: no devices/emulators found

On a Samsung S5 Neo (SM-903F):

$. /android_backup_project

Waiting for device...
Devices detected:
List of devices attached
XXXXXXXXXXXXX	device

Checking for root access...
1) Requesting adbd as root...
adbd is already running as root
Waiting for device...
root
Determining architecture...
Unrecognized architecture armv8l

I've found a workaround, will submit a PR asap

the system has installed pv 1.6.20, but script is still stopping and showing the error:
"pv is lower than required version: 1.6.6"

seems that thi part isn't working well:

  else
    v=`echo $pv | head -n 1 | cut -d " " -f2`
    if [ "$v" \< "1.6.6" ]; then
      echo "$v of pv is lower than required version: 1.6.6"
      exit 1
    fi

add armv7l architecture for pushing busybox

$ ./full-backup.sh
1.6.20 of pv is lower than required version: 1.6.6

there is an issue with Android <= 8.1 which does not allow installing an application by overwriting which is already installed on the device.

workaround: uninstall the application from the device before restoring the backup

On Debian 10 Buster:

$ ./backup_apps.sh --system-apps

./functions.sh: ligne 84: pv : command not found

Fix:

$ sudo apt install pv