The difference in file access capabilities between standard Zygisk and its alternatives, Zygisk Next and ReZygisk, presents a significant barrier for module developers. While Zygisk Next and ReZygisk allow modules to directly read files within the `/data/adb/modules/` directory, standard Zygisk blocks this functionality, forcing developers to use workarounds like companion processes. This inconsistency introduces unnecessary complexity and potential performance issues for modules relying on local configuration files.
This discrepancy stems from Zygisk's stricter security model which prevents direct file access in `/data/adb/modules/`. However, Zygisk Next and ReZygisk demonstrate that controlled file access within this directory is possible while maintaining a secure environment. This begs the question: why not extend this functionality to standard Zygisk?
There are numerous reasons why this inconsistency is a problem. Firstly, it significantly increases the development effort required for modules. Simple tasks like loading a configuration file from a module's directory become significantly more involved when companion processes are required. Secondly, the reliance on these workarounds can negatively impact performance, especially for modules needing fast access to critical data. Furthermore, this fragmentation within the Zygisk ecosystem hinders module compatibility and development. Developers are forced to maintain two separate code paths for their modules: one for standard Zygisk and another for the modified versions.
Allowing controlled file access within `/data/adb/modules/` for standard Zygisk would alleviate these issues and benefit the entire Magisk community. There are two viable solutions:
* Option 1: Loosen SELinux and mount namespace restrictions within `/data/adb/modules/` to achieve the same level of control as Zygisk Next.
* Option 2: Implement an official API within the Zygisk framework that allows modules to safely and securely access files within their designated directories.
By addressing this inconsistency, the Zygisk development team can significantly improve the developer experience, foster module compatibility, and strengthen the Magisk ecosystem as a whole.
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