It is not Minixy derivative, there is no Unix-like, it's access control is hybrid of traditional role based and capability-based on distributed OpenHarmony operating system base with a distributed file system, on a distributed operating system distro of HarmonyOS. And the kernel module structure is far different on MINIXY https://codedocs.org/what-is/minix-3 HarmonyOS 4.2 uses mature security defense mechanisms such as SELinux, Seccomp, Namespace, and Capability (iOS 17 uses Sandbox and Entitlement to achieve similar effects). HarmonyOS NEXT has designed a CAPABILITY SYSTEM on top of existing defense mechanisms to restrict access to kernel functions and verify IPC permissions.

In HarmonyOS NEXT, kernel objects are used as carriers for data transmission during IPC communication. The CAPABILITY SYSTEM ensures that only those with the capability to read from or write to kernel objects can receive or send messages through these objects. As a result, the content of messages cannot be accessed by malicious processes. DarkNavy ethical cybersecurity group in China tested Huawei's HarmonyOS Next custom kernel earlier this year with a report released in June. https://www.darknavy.org/blog/avss_report_kernel/ and the toolchain is exposed: https://harmonyoshub.com/harmonyos-next-leak-exposes-the-in-...