如何等待非子进程退出 [英] How to wait for exit of non-children processes

问题描述

有关的子进程中，的wait（）和 waitpid函数（）功能可以用来中止执行目前的进程，直到孩子已退出。但此功能不能用于非子进程。

For child processes, the wait() and waitpid() functions can be used to suspends execution of the current process until a child has exited. But this function can not be used for non-child processes.

有另一种功能，可以等待任何进程？

Is there another function, which can wait for exit of any process ?

推荐答案

没有等同于等待（）。通常的做法是使用杀（PID，0）并寻找返回值-1 错误号和轮询 ESRCH 来表示该过程已经一去不复返了。

Nothing equivalent to wait(). The usual practice is to poll using kill(pid, 0) and looking for return value -1 and errno of ESRCH to indicate that the process is gone.

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