如何讓父進程顯示PID的子代替值變量？

Question

在linux中我怎樣才能讓父進程顯示子進程的PID而不是值變量？

Answer 1

當你分叉時，你得到孩子PID的機會。

的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); 
}