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 NAME     
 |  |  |  | sendfd, recvfd – pass file descriptors along Unix domain sockets 
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 SYNOPSIS     
 |  |  |  | #include <u.h> 
    
    
    #include <libc.h> 
    
    
    int    sendfd(int socket, int fd) 
    
    
    int    recvfd(int socket) 
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 DESCRIPTION     
 |  |  |  | Recvfd and sendfd can be used to pass an open file descriptor
    over a Unix domain socket from one process to another. Since pipe(3)
    is implemented with socketpair(2) instead of pipe(2), socket can
    be a file descriptor obtained from pipe(3). 
    
    
    Sendfd sends the file descriptor fd along the socket to a process
    calling recvfd on the other end. 
    
    
    It is assumed that the two sides have coordinated and agreed to
    transfer a file descriptor already, so that the sendfd is met
    with a recvfd instead of an ordinary read. 
    
    
    The file descriptor number may change on its way between processes,
    but the kernel structure it represents will not. 
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 SOURCE     
 SEE ALSO    
 |  |  |  | socketpair(2), sendmsg in send(2) 
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