Android 9 pm命令执行流程调查

pm 可以执行程序

1|m891a:/ # which pm
/system/bin/pm
m891a:/ # cat /system/bin/pm
#!/system/bin/sh
cmd package "$@"
m891a:/ # 

源码位置：AOSP/frameworks/base/cmds/*
cmd文件位置：AOSP/frameworks/native/cmds/cmd/cmd.cpp

if ((argc == 2) && (strcmp(argv[1], "-l") == 0)) {
        Vector<String16> services = sm->listServices();
        services.sort(sort_func);
        aout << "Currently running services:" << endl;
        for (size_t i=0; i<services.size(); i++) {
            sp<IBinder> service = sm->checkService(services[i]);
            if (service != NULL) {
                aout << "  " << services[i] << endl;
            }
        }
        return 0;
    }

可以使用cmd -l列出所有服务
接下来会调用Package manager (package) commands

127|m891a:/ # cmd package                                                                                                                                                                                  
Package manager (package) commands:
  help
    Print this help text.

  path [--user USER_ID] PACKAGE
    Print the path to the .apk of the given PACKAGE.

  dump PACKAGE
    Print various system state associated with the given PACKAGE.

  list features
    Prints all features of the system.
   ......

最后

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