(OK) Linux 下解包华为固件包UPDATE.APP
https://github.com/marcominetti/split_updata.pl
https://pan.baidu.com/s/1qYLHd7Y
splitupdate (formerly split_updata.pl)
Improved tool for splitting UPDATE.APP for Huawei phones
To extract execute:
chmod +x splitupdate
./splitupdate UPDATE.APP
The img files will be extracted in the /output/ folder.