nbd_aio_get_fd(3)                   LIBNBD                   nbd_aio_get_fd(3)


NAME
       nbd_aio_get_fd - return file descriptor associated with this connection

SYNOPSIS
        #include <libnbd.h>

        int nbd_aio_get_fd (
              struct nbd_handle *h
            );

DESCRIPTION
       Return the underlying file descriptor associated with this connection.
       You can use this to check if the file descriptor is ready for reading
       or writing and call nbd_aio_notify_read(3) or nbd_aio_notify_write(3).
       See also nbd_aio_get_direction(3).  Do not do anything else with the
       file descriptor.

RETURN VALUE
       This call returns a file descriptor.

ERRORS
       On error -1 is returned.

       Refer to "ERROR HANDLING" in libnbd(3) for how to get further details
       of the error.

       The following parameters must not be NULL: "h".  For more information
       see "Non-NULL parameters" in libnbd(3).

VERSION
       This function first appeared in libnbd 1.0.

       If you need to test if this function is available at compile time check
       if the following macro is defined:

        #define LIBNBD_HAVE_NBD_AIO_GET_FD 1

SEE ALSO
       nbd_aio_get_direction(3), nbd_aio_notify_read(3),
       nbd_aio_notify_write(3), nbd_create(3), libnbd(3).

AUTHORS
       Eric Blake

       Richard W.M. Jones

COPYRIGHT
       Copyright Red Hat

LICENSE
       This library is free software; you can redistribute it and/or modify it
       under the terms of the GNU Lesser General Public License as published
       by the Free Software Foundation; either version 2 of the License, or
       (at your option) any later version.

       This library is distributed in the hope that it will be useful, but
       WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
       Lesser General Public License for more details.

       You should have received a copy of the GNU Lesser General Public
       License along with this library; if not, write to the Free Software
       Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
       02110-1301 USA

libnbd-1.20.0                     2024-05-31                 nbd_aio_get_fd(3)