lab4-1.c

父子进程实现

#include <stdio.h>
#include<stdlib.h>
#include<unistd.h>
#include<sys/types.h>
#include <sys/wait.h>


int main(void)
{
	pid_t	pid, pid2;

	while((pid=fork()) < 0);
	if(pid==0){
		
		printf("The son1 start:\n");
		if(execl("/etc/linfeng/test-8led-exe","","","NULL")<0)
			printf("linfeng is testing wrong. son1==!!!\n");
	}else{
		while((pid2=fork())<0);
		 if(pid2==0){
			sleep(5);
			printf("The son2 start:\n");
			if(execl("/etc/linfeng/test-led-exe","","","NULL")<0)
				printf("linfeng is testing wrong. son2==!!!\n");
		
		}
	}
	exit(0);
}