Zygisk, the popular Android module system, boasts a robust framework for modifying the system. However, a notable inconsistency exists between Standard Zygisk and its counterparts, Zygisk Next and ReZygisk, regarding file access within the /data/adb/modules/ directory. Standard Zygisk currently blocks direct file access, necessitating developers to employ cumbersome workarounds like companion processes for even basic operations like reading configuration files. This discrepancy creates a fragmented development ecosystem and hinders the user experience.
The primary issue stems from the limitations imposed by Standard Zygisk's security model. While Zygisk Next and ReZygisk allow for controlled file access within this directory, effectively demonstrating its feasibility, Standard Zygisk enforces strict restrictions. Consequently, developers are forced to implement companion processes for file operations, adding unnecessary complexity to module development and increasing the likelihood of errors. This inconsistency breaks both the developer experience and module compatibility, as developers must maintain separate code paths for Standard and modified Zygisk implementations.
This inconsistency significantly impacts the capabilities of various module types. Primarily, modules that rely on configuration files stored within /data/adb/modules/, such as those used for patching Play Integrity systems, implementing spoofing functionalities, or providing customized settings, face substantial hurdles. These workarounds introduce a significant overhead and introduce potential vulnerabilities. Furthermore, the reliance on companion processes increases the complexity of module debugging and maintenance, ultimately impacting the overall stability and usability of the Android modding ecosystem.
Addressing this issue is crucial for fostering a more robust and unified Zygisk ecosystem. Two potential solutions stand out: loosening SELinux/mount namespace rules specifically for the /data/adb/modules/ directory, mirroring the approach taken by Zygisk Next, or providing an official API for module file access within Zygisk, enabling secure and streamlined operations.
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