/*execlp.c*/
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

int main()
{
	if(fork()==0){
/*調用execlp函數，這里相當于調用了“ps -ef”命令*/
		if(execlp("ps","ps","-ef",NULL)<0)
			perror("execlp error!");
	}
}