NAME

       io_uring_prep_close - prepare a file descriptor close request

SYNOPSIS

       #include <liburing.h>

       void io_uring_prep_close(struct io_uring_sqe *sqe,
                                 int fd);

       void io_uring_prep_close_direct(struct io_uring_sqe *sqe,
                                       unsigned file_index);

DESCRIPTION

       The  io_uring_prep_close(3)  function prepares a close request. The submission queue entry
       sqe is setup to close the file descriptor indicated by fd.

       For a direct descriptor close request, the offset is specified by the file_index  argument
       instead  of  the  fd.   This  is  identical to unregistering the direct descriptor, and is
       provided as a convenience.

       These functions prepare an async close(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), close(2)