unix 域套接字 有关问题

                           

 25         int var;                                              

 26         var=fcntl(sockfd,F_GETFL,0);                                   

 27         if(var&O_NONBLOCK)                                              

 28         {                                                                        

 29                 cout<<"O_NONBLOCK"<<endl;                                                 

 30         }//判断是一个阻塞的套接字

 31         while(1)                                                                           

 32         {

 33                 if((connfd=accept(sockfd,(SA*)&addr2,&len))<0)