perm-fs

perm-fs is a tool developed for UKA.

It is designed to replace a shell script previously used for tracking changes in unpacked firmware images (e.g., system.img) and updating the corresponding fs_config for future builds.

Features

• Automatically assigns permissions to new files in the firmware image.
• Significantly faster than the original shell script due to its native implementation.

Build

1. Clone the repository:

   git clone https://github.com/Mrakorez/perm-fs
   

2. Navigate to its directory:

    cd perm-fs
   

3. Build for Android:

   make
   

Usage

Run perm-fs with the following syntax:

Usage: perm-fs <target> <fs-config>

Parameters

• <target> – Path to the unpacked firmware image.
• <fs-config> – Path to the fs_config file of the image.

A log file and a cache containing computed permissions for new files will be stored alongside <fs-config>.

Example

perm-fs /path/to/system_raw/ /path/to/config/system_raw/fs_config