- read_bytes=read(0,buf,sizeof(buf));
- send_bytes=sendto(send_fd,buf,sizeof(buf),0,(struct sockaddr *)&remote_addr,remote_addr_len);
+ read_bytes=read(cmd_fd,buf,sizeof(buf));
+ send_bytes=sendto(send_fd,buf,read_bytes,0,(struct sockaddr *)&remote_addr,remote_addr_len);