noble (3) nbd_poll2.3.gz

Provided by: libnbd-dev_1.20.0-1_amd64 bug

NAME
       nbd_poll2 - poll the handle once, with fd


SYNOPSIS
        #include <libnbd.h>

        int nbd_poll2 (
              struct nbd_handle *h, int fd, int timeout
            );


DESCRIPTION
       This is the same as nbd_poll(3), but an additional file descriptor parameter is passed.  The additional
       fd is also polled (using "POLLIN").  One use for this is to wait for an eventfd(2).


RETURN VALUE
       This call returns an integer ≥ 0.


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 1.16.

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

        #define LIBNBD_HAVE_NBD_POLL2 1


SEE ALSO
       nbd_create(3), nbd_poll(3), libnbd(3), eventfd(2).


AUTHORS
       Eric Blake

       Richard W.M. Jones


       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