The following values apply only to long-running child processes that have been invoked by a long-running process through a synchronous interface.
下面这些值只用在长期运行的子过程,它们通过异步接口被长期运行的流程调用。
ECHILD -- The wait() or waitpid() function tried to wait for a child process to exit, but all children have already exited.
ECHILD:wait() 或 waitpid() 函数尝试等待退出子进程,但所有子项都已经退出。
I am also worried about the beginning, but now Well, this is a process, and one child have to do.
我刚开始也很担心,但现在好了,这是一个过程,独生子女都这样。
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