evfork.c

来自「深圳英培特EduKit-III实验箱实验程序。一共有10多个」· C语言 代码 · 共 32 行

/*********************************************************************
* File：		evfork.c
* Author：	Embest	J.Zhao	2005.2.17
* Desc：		processes
* History：
*********************************************************************/
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>

main()
{
	int pid;
	//creat the child process.
	pid=vfork();

	//execute process according to the pid returned.
	if (pid < 0)
		//creat failed.
		printf("error in fork!\n");
	else if (pid == 0)
		//return 0 ,exec the child.
		printf("i am the child process, my process id is %d\n",getpid());
	else 
{
		//return the child pid,exec the parent.
		printf("i am the parent process, my process id is %d\n",getpid());
		exit(0);
	}
	printf("end pid is %d\n",getpid());
}