#include <apue.h>
#include <sys/wait.h>

char * env_init[] = {"USER=unknow","PATH=/tmp",NULL};
int main(void)
{
        pid_t pid;
        if((pid=fork())<0)
        {
                printf("fork error\n");
        }
        else if(pid == 0)
        {
                if(execle("/home/zhuhaichao/apue练习/8.17“,”8.17“,”mysql","MY ARG2",(char *) 0,env_init)<0)
                printf("execute error\n");                   //我就把pathname改了，要执行的可执行文件8.17在这个目录下
        }
        if(waitpid(pid,NULL,0)<0)
        {
                printf("wait error\n");
        }
  if((pid=fork())<0)
        {
                printf("fork error\n");
        }

        else if(pid == 0)
                {
                         if(execlp("8.17","8.17","only 1 arg",(char *) 0)<0)
                        {
                                printf("exec error\n");
                        }
                }

        exit(0);