waitpid()有什么作用?

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waitpid()的用途是什么?

推荐答案

通常用于等待特定进程完成(或者，如果使用特殊标志，则更改状态)，具体取决于其进程ID(否则称为一个pid).

It's used generally to wait until a specific process finishes (or otherwise changes state if you're using special flags), based on its process ID (otherwise known as a pid).

它也可以用于等待一组子进程中的任何一个，既可以是特定进程组的子进程，也可以是当前进程的任何子进程.

It can also be used to wait for any of a group of child processes, either one from a specific process group or any child of the current process.

有关血腥细节，请参见此处.

See here for the gory details.