Android System Programming

Analyzing the init process and ramdisk

The implementation of the init process can be found in the $AOSP/system/core/init directory. If we look at the main function in init.cpp, it includes the code for ueventd and watchdogd, as shown in the following code snippet:

int main(int argc, char** argv) {     if (!strcmp(basename(argv[0]), "ueventd")) {         return ueventd_main(argc, argv);     }     if (!strcmp(basename(argv[0]), "watchdogd")) {         return watchdogd_main(argc, argv);     }     ... 

We won't discuss ueventd and watchdogd, since they are not related to our topics. We will focus on the mainline code of init.cpp. The mainline code of init implements the following logic:

1. Preparation for the environment, such as creating system folders, setting up the standard ...