NAME

       io_uring_prep_tee - prepare a tee request

SYNOPSIS

       #include <fcntl.h>
       #include <liburing.h>

       void io_uring_prep_tee(struct io_uring_sqe *sqe,
                              int fd_in,
                              int fd_out,
                              unsigned int nbytes,
                              unsigned int splice_flags);

DESCRIPTION

       The  io_uring_prep_tee(3)  function prepares a tee request. The submission queue entry sqe
       is setup to use as input the file descriptor fd_in  and  as  output  the  file  descriptor
       fd_out  duplicating  nbytes  bytes worth of data.  splice_flags are modifier flags for the
       operation. See tee(2) for the generic splice flags.

       If the fd_out descriptor, IOSQE_FIXED_FILE can be set in the SQE to indicate that. For the
       input  file,  the  io_uring  specific SPLICE_F_FD_IN_FIXED can be set and fd_in given as a
       registered file descriptor offset.

       This function prepares an async tee(2) request. See that man page for details.

RETURN VALUE

       None

ERRORS

       The CQE res field will contain the result of the operation. See the related man  page  for
       details  on  possible  values.  Note that where synchronous system calls will return -1 on
       failure and set errno to the actual error value, io_uring never uses  errno.   Instead  it
       returns the negated errno directly in the CQE res field.

SEE ALSO

       io_uring_get_sqe(3), io_uring_submit(3), io_uring_register(2), splice(2), tee(2)