|  | 
 NAME     
 |  |  |  | openfd – prepare a fid for I/O using a file descriptor 
 | 
 SYNOPSIS     
 |  |  |  | size[4] Topenfd tag[2] fid[4] mode[1] size[4] Ropenfd tag[2] qid[13] iounit[4] unixfd[4]
 
 | 
 DESCRIPTION     
 |  |  |  | The openfd request behaves like open, except that it prepares
    and returns a Unix file descriptor corresponding to the opened
    fid. 
    
    
    After a successful open transaction, fid is considered by the
    client to have been clunked and can be reused. 
    
    
    The returned Unix file descriptor is one end of a Unix pipe. A
    proxy process at the other end transfers data between the pipe
    and the 9P server. Because it is a pipe, errors on reads and writes
    are discarded and mode must be OREAD or OWRITE; it cannot be ORDWR.
    
    
    
    Openfd is implemented by 9pserve(4). 9P servers that post their
    services using 9pserve(4) (or indirectly via post9pservice(3))
    will never see a Topenfd message. 
 | 
 ENTRY POINTS    
 |  |  |  | Fsopenfd (see 9pclient(3)) generates an openfd message. 
 | 
 |  |