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-.. This file is dual-licensed: you can use it either under the terms
-.. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this
-.. dual licensing only applies to this file, and not this project as a
-.. whole.
-..
-.. a) This file is free software; you can redistribute it and/or
-..    modify it under the terms of the GNU General Public License as
-..    published by the Free Software Foundation version 2 of
-..    the License.
-..
-..    This file 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 General Public License for more details.
-..
-.. Or, alternatively,
-..
-.. b) Permission is granted to copy, distribute and/or modify this
-..    document under the terms of the GNU Free Documentation License,
-..    Version 1.1 or any later version published by the Free Software
-..    Foundation, with no Invariant Sections, no Front-Cover Texts
-..    and no Back-Cover Texts. A copy of the license is included at
-..    Documentation/media/uapi/fdl-appendix.rst.
-..
-.. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections
-
-.. _request-func-poll:
-
-**************
-request poll()
-**************
-
-Name
-====
-
-request-poll - Wait for some event on a file descriptor
-
-
-Synopsis
-========
-
-.. code-block:: c
-
-    #include <sys/poll.h>
-
-
-.. c:function:: int poll( struct pollfd *ufds, unsigned int nfds, int timeout )
-   :name: request-poll
-
-Arguments
-=========
-
-``ufds``
-   List of file descriptor events to be watched
-
-``nfds``
-   Number of file descriptor events at the \*ufds array
-
-``timeout``
-   Timeout to wait for events
-
-
-Description
-===========
-
-With the :c:func:`poll() <request-func-poll>` function applications can wait
-for a request to complete.
-
-On success :c:func:`poll() <request-func-poll>` returns the number of file
-descriptors that have been selected (that is, file descriptors for which the
-``revents`` field of the respective struct :c:type:`pollfd`
-is non-zero). Request file descriptor set the ``POLLPRI`` flag in ``revents``
-when the request was completed.  When the function times out it returns
-a value of zero, on failure it returns -1 and the ``errno`` variable is
-set appropriately.
-
-Attempting to poll for a request that is not yet queued will
-set the ``POLLERR`` flag in ``revents``.
-
-
-Return Value
-============
-
-On success, :c:func:`poll() <request-func-poll>` returns the number of
-structures which have non-zero ``revents`` fields, or zero if the call
-timed out. On error -1 is returned, and the ``errno`` variable is set
-appropriately:
-
-``EBADF``
-    One or more of the ``ufds`` members specify an invalid file
-    descriptor.
-
-``EFAULT``
-    ``ufds`` references an inaccessible memory area.
-
-``EINTR``
-    The call was interrupted by a signal.
-
-``EINVAL``
-    The ``nfds`` value exceeds the ``RLIMIT_NOFILE`` value. Use
-    ``getrlimit()`` to obtain this value.