Adb tool cannot output device serial number properly when running Aadb devices

[Dorp-lab]

Problem description

As shown in the figure, the adb tool cannot correctly output the serial number of the connected device when executing the adb devices instruction

What steps will reproduce the bug?

First, turn on Developer Mode on the device to be debugged, then enable ADB debugging. Next, connect the device to a device that has Developer Mode enabled and ADB debugging permissions turned on and has ZeroTermux installed. When the device is connected, a prompt will appear asking whether to allow debugging. Click 'Allow' to grant authorization. After that, executing the 'adb devices' command only outputs a blank text.

Android versions of both devices: Android 10
ADB tools version: Android Debug Bridge version 1.0.41
Version 35.0.2-android-tools
Installed at /data/data/com.termux/files/usr/bin/adb
Running on Linux 4.14.116 (aarch64)

What is the expected behavior?

After the instruction is executed, the correct device serial number should be output

System information

## ZeroTermux App Info

**APP_NAME**: `ZeroTermux`  
**PACKAGE_NAME**: `com.termux`  
**VERSION_NAME**: `0.118.3.51`  
**VERSION_CODE**: `117`  
**UID**: `10572`  
**TARGET_SDK**: `28`  
**IS_DEBUGGABLE_BUILD**: `false`  
**SE_PROCESS_CONTEXT**: `u:r:untrusted_app_27:s0:c60,c258,c512,c768`  
**SE_FILE_CONTEXT**: `u:object_r:app_data_file:s0:c60,c258,c512,c768`  
**SE_INFO**: `default:targetSdkVersion=28:complete`  
**TERMUX_APP_PACKAGE_MANAGER**: `APT`  
**TERMUX_APP_PACKAGE_VARIANT**: `APT_ANDROID_7`  
**APK_RELEASE**: `Unknown`  
**SIGNING_CERTIFICATE_SHA256_DIGEST**: `4A246F97551128DD855E5EEED3326A409454DD7CC6B7FC5268AA8528AD0A81E7`  
##


## Device Info

### Software

**OS_VERSION**: `4.14.116`  
**SDK_INT**: `29`  
**RELEASE**: `10`  
**ID**: `HUAWEIMLD-AL00`  
**DISPLAY**: `MED-AL00CH 2.0.0.133(C00E27R2P3)`  
**INCREMENTAL**: `102.0.0.133C00`  
**SECURITY_PATCH**: `2020-11-01`  
**IS_DEBUGGABLE**: `0`  
**IS_TREBLE_ENABLED**: `true`  
**TYPE**: `user`  
**TAGS**: `release-keys`  

### Hardware

**MANUFACTURER**: `HUAWEI`  
**BRAND**: `HUAWEI`  
**MODEL**: `MLD-AL00`  
**PRODUCT**: `MED-AL00CH`  
**BOARD**: `MED`  
**HARDWARE**: `kirin710`  
**DEVICE**: `HWMED-H`  
**SUPPORTED_ABIS**: `arm64-v8a, armeabi-v7a, armeabi`  
##


## Important Links

### GitHub

[Termux](https://github.com/termux/termux-app)  
[Termux:API](https://github.com/termux/termux-api)  
[Termux:Boot](https://github.com/termux/termux-boot)  
[Termux:Float](https://github.com/termux/termux-float)  
[Termux:Styling](https://github.com/termux/termux-styling)  
[Termux:Tasker](https://github.com/termux/termux-tasker)  
[Termux:Widget](https://github.com/termux/termux-widget)  
[termux-packages](https://github.com/termux/termux-packages)  

### Email

[support@termux.dev](mailto:support@termux.dev)  

### Reddit

[r/termux](https://www.reddit.com/r/termux)  

### Wiki

[Termux Wiki](https://wiki.termux.com)  
[Termux](https://github.com/termux/termux-app/wiki)  
[termux-packages](https://github.com/termux/termux-packages/wiki)  
##

[Biswa96]

the adb tool cannot correctly output the serial number of the connected device

How did you connect the device?

[Dorp-lab]

the adb tool cannot correctly output the serial number of the connected device

How did you connect the device?
Use a charging cable that can transmit data,and there are no issues with the connection between the two phones,the connection between devices can be detected when using other commands.

[robertkirkman]

ZeroTermux is different from F-Droid Termux, I'm not sure if that can make a difference here, but have you tried using F-Droid Termux?

also, have you tried using the termux-usb command with the adb command, like this?

termux-usb -l
termux-usb -r -E -e "adb devices -l" /dev/bus/usb/002/002

[Dorp-lab]

ZeroTermux is different from F-Droid Termux, I'm not sure if that can make a difference here, but have you tried using F-Droid Termux?

also, have you tried using the termux-usb command with the adb command, like this?

termux-usb -l
termux-usb -r -E -e "adb devices -l" /dev/bus/usb/002/002

I didn't try to do this because when I was choosing between these two pieces of software, I considered that due to the particular situation in Mainland China, Termux's network connection might not be as smooth as ZeroTermux, so I only downloaded the latter. My original intention was to use ZeroTermux to activate Shizuku, but for some reasons, I needed to obtain the device serial number using 'adb devices'. However, due to my limited knowledge, I was not aware of the command set related to termux-usb that you mentioned, so I never tried that method. But now I already have another solution. Thank you for your attention to this issue.