iob_addfile - add file region to I/O batch

       iob_addfile  schedules  n bytes from the file descriptor fd starting at offset off to be written with the
       I/O batch b.

       You may not close fd before iob_send indicates it is done.

       Use iob_addfile_close if you want the file descriptor to be closed automatically by iob_reset.

       iob_addfile - add file region to I/O batch

       Returns 1 on success, 0 on failure.

iob_reset(3), iob_send(3), iob_addbuf(3), iob_addfile_close(3)

                                                                                                  iob_addfile(3)

#include<libowfat/iob.h>

       int iob_addfile(io_batch* b,int64 fd,uint64 off,uint64 n);