gistfile1.h

static VALUE                                                                       
init_sock(sock, fd)                                                                
    VALUE sock;                                                                    
    int fd;                                                                        
{                                                                                  
    OpenFile *fp;                                                                  
                                                                                   
    MakeOpenFile(sock, fp);                                                        
    fp->f = rb_fdopen(fd, "rw");                                                   
    fp->f2 = fp->f; // rb_fdopen(fd, "w");                                         
    fp->mode = FMODE_READWRITE;                                                    
    rb_io_synchronized(fp);                                                        
                                                                                   
    return sock;                                                                   
}