功能是创建传递过来的进程的克隆过程并赋于其ID值，确定进程在列表中的位置，从第二个参数中提取克隆ID，检查是否有创建子进程的需要，发送新进程的命令行和克隆号-Function is to create a process to pass over the cloning process and assigns the value of its ID，Determine the position in the list of processes to extract clone ID from the second parameter，Check whether there is a need to create a child process, the process of sending a new command line and clone