plucky (3) io_uring_prep_tee.3.gz

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)