18c2ecf20Sopenharmony_ci.. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later 28c2ecf20Sopenharmony_ci.. c:namespace:: MC.request 38c2ecf20Sopenharmony_ci 48c2ecf20Sopenharmony_ci.. _request-func-close: 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ci*************** 78c2ecf20Sopenharmony_cirequest close() 88c2ecf20Sopenharmony_ci*************** 98c2ecf20Sopenharmony_ci 108c2ecf20Sopenharmony_ciName 118c2ecf20Sopenharmony_ci==== 128c2ecf20Sopenharmony_ci 138c2ecf20Sopenharmony_cirequest-close - Close a request file descriptor 148c2ecf20Sopenharmony_ci 158c2ecf20Sopenharmony_ciSynopsis 168c2ecf20Sopenharmony_ci======== 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ci.. code-block:: c 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ci #include <unistd.h> 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ci.. c:function:: int close( int fd ) 238c2ecf20Sopenharmony_ci 248c2ecf20Sopenharmony_ciArguments 258c2ecf20Sopenharmony_ci========= 268c2ecf20Sopenharmony_ci 278c2ecf20Sopenharmony_ci``fd`` 288c2ecf20Sopenharmony_ci File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`. 298c2ecf20Sopenharmony_ci 308c2ecf20Sopenharmony_ciDescription 318c2ecf20Sopenharmony_ci=========== 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_ciCloses the request file descriptor. Resources associated with the request 348c2ecf20Sopenharmony_ciare freed once all file descriptors associated with the request are closed 358c2ecf20Sopenharmony_ciand the driver has completed the request. 368c2ecf20Sopenharmony_ciSee :ref:`here <media-request-life-time>` for more information. 378c2ecf20Sopenharmony_ci 388c2ecf20Sopenharmony_ciReturn Value 398c2ecf20Sopenharmony_ci============ 408c2ecf20Sopenharmony_ci 418c2ecf20Sopenharmony_ci:c:func:`close()` returns 0 on success. On error, -1 is 428c2ecf20Sopenharmony_cireturned, and ``errno`` is set appropriately. Possible error codes are: 438c2ecf20Sopenharmony_ci 448c2ecf20Sopenharmony_ciEBADF 458c2ecf20Sopenharmony_ci ``fd`` is not a valid open file descriptor. 46