清单7与清单6相反——即在父进程之前终止的子进程。

Listing 7 shows the opposite of Listing 6 — that is, the child dying before the parent.

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它必须与fork命令一起使用，所以父进程和子进程都在运行：pid_t fork (void)。

This must be used along with the fork command so both the parent and child processes are running: pid_t fork (void).

youdao

fork会创建一个子进程，与父进程相比只是PID和PPID不同；实际上，资源利用设为0。

Fork creates a child process that differs from the parent process only in its PID and PPID; in fact, the resource utilizations are set to 0.

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