是杀功能同步？ [英] Is kill function synchronous?

问题描述

是杀在Linux的同步功能？我说，我编程调用杀函数终止一个进程，它会返回只有当预期的过程被终止，或者它只是将信号发送和返回。如果是这样的话，我怎么可以让它等待被杀害预期的过程吗？

Is the kill function in Linux synchronous? Say, I programatically call the kill function to terminate a process, will it return only when the intended process is terminated, or it just sends the signal and return. If that is the case, how can I make it wait for the intended process to be killed?

推荐答案

没有，因为它不杀生，只发出了一个信号的过程。

No, since it doesn't kill anything, it only sends a signal to the process.

在默认情况下该信号甚至可以阻止或忽略。

By default this signal can even be blocked or ignored.

您不能阻止杀死-9 从而重新presents发送 SIGKILL

You can't block kill -9 which represents sending SIGKILL

要等待的过程中死亡：

while kill -0 PID_OF_THE_PROCESS 2>/dev/null; do sleep 1; done

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