Method checkSpawned

src/ipc/process.cpp:38–56

    }
    int waitSpawned(int pid) override { return mp::WaitProcess(pid); }
    bool checkSpawned(int argc, char* argv[], int& fd) override
    {
        // If this process was not started with a single -ipcfd argument, it is
        // not a process spawned by the spawn() call above, so return false and
        // do not try to serve requests.
        if (argc != 3 || strcmp(argv[1], "-ipcfd") != 0) {
            return false;
        }
        // If a single -ipcfd argument was provided, return true and get the
        // file descriptor so Protocol::serve() can be called to handle
        // requests from the parent process. The -ipcfd argument is not valid
        // in combination with other arguments because the parent process
        // should be able to control the child process through the IPC protocol
        // without passing information out of band.
        if (!ParseInt32(argv[2], &fd)) {
            throw std::runtime_error(strprintf("Invalid -ipcfd number '%s'", argv[2]));
        }
        return true;
    }
};
} // namespace