Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help 
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  operating  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 occurred, it
     will return -1 for EAGAIN, or -3 otherwise.

SEE ALSO
     io_wait(3), io_waituntil(3)

								  io_sendfile(3)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=libowfat_io_sendfile&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>

home | help