34 lines
770 B
C
34 lines
770 B
C
|
#include <stdio.h>
|
|||
|
|
#include <unistd.h>
|
|||
|
|
|
|||
|
|
int main(int arg,char* argv[]){
|
|||
|
|
|
|||
|
|
// int 被 typedef 为 pid_t
|
|||
|
|
pid_t pid=fork();
|
|||
|
|
|
|||
|
|
// 当pid==0时，是子进程代码运行区域。其他则是父进程运行区域。
|
|||
|
|
if(pid<0){
|
|||
|
|
printf("Create child process failed ...\n");
|
|||
|
|
}else if(pid==0){
|
|||
|
|
//子进程执行体
|
|||
|
|
printf("Create child process successfully %i \n",getpid());
|
|||
|
|
}
|
|||
|
|
else{
|
|||
|
|
//父进程执行体
|
|||
|
|
printf("This is parent process %i \n",getpid());
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// 执行体结束标志
|
|||
|
|
if(pid==0)
|
|||
|
|
{
|
|||
|
|
sleep(3);
|
|||
|
|
printf("pid=%i child process end ... \n",getpid());
|
|||
|
|
}
|
|||
|
|
else{
|
|||
|
|
// 睡眠5s,等待子进程结束
|
|||
|
|
sleep(5);
|
|||
|
|
printf("pid=%i Parent process end ... \n",getpid());
|
|||
|
|
}
|
|||
|
|
return 0;
|
|||
|
|
}
|