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io_sendfile(3)		   Library Functions Manual		io_sendfile(3)

NAME
       io_sendfile - send data from a file to a	socket

SYNTAX
       #include	<libowfat/io.h>

       int64 io_sendfile(int64 sock,int64 fd,uint64 off,uint64 n);

DESCRIPTION
       io_sendfile sends data from a file to a socket.	This function tries to
       do this in a way	that allows high quality operating systems to do zero-
       copy  TCP  (serving  the	data without copying the file contents to user
       space or	inside kernel space).  This function will use special  operat-
       ing  system "sendfile" primitives where available and use memory	mapped
       I/O otherwise.  It should  always  be  faster  than  using  read()  and
       write() to copy the data	yourself.

       io_sendfile  will  return  the  number  of bytes	sent.  If an error oc-
       curred, it will return -1 for EAGAIN, or	-3 otherwise.

SEE ALSO
       io_wait(3), io_waituntil(3)

								io_sendfile(3)

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