linux - 如何让父进程显示子进程的 PID 而不是值变量？

Question

在linux中如何让父进程显示子进程的PID而不是值变量？

Answer 1

您获得子 PID 的机会是在您 fork 时。

Python:

import os

child_pid = os.fork()
if child_pid == 0:
    print "This is the child, my pid is", os.getpid()
else:
    print "This is the parent, my child pid is", child_pid

C:

pid_t child_pid = fork();
if (child_pid == 0) {
    printf("This is the child, my pid is %d\n", getpid());
}
else {
    printf("This is the parent, my child pid is %d\n", child_pid);
}