| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | .. This file is dual-licensed: you can use it either under the terms |
| 2 | .. of the GPL 2.0 or the GFDL 1.1+ license, at your option. Note that this |
| 3 | .. dual licensing only applies to this file, and not this project as a |
| 4 | .. whole. |
| 5 | .. |
| 6 | .. a) This file is free software; you can redistribute it and/or |
| 7 | .. modify it under the terms of the GNU General Public License as |
| 8 | .. published by the Free Software Foundation version 2 of |
| 9 | .. the License. |
| 10 | .. |
| 11 | .. This file is distributed in the hope that it will be useful, |
| 12 | .. but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | .. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | .. GNU General Public License for more details. |
| 15 | .. |
| 16 | .. Or, alternatively, |
| 17 | .. |
| 18 | .. b) Permission is granted to copy, distribute and/or modify this |
| 19 | .. document under the terms of the GNU Free Documentation License, |
| 20 | .. Version 1.1 or any later version published by the Free Software |
| 21 | .. Foundation, with no Invariant Sections, no Front-Cover Texts |
| 22 | .. and no Back-Cover Texts. A copy of the license is included at |
| 23 | .. Documentation/media/uapi/fdl-appendix.rst. |
| 24 | .. |
| 25 | .. TODO: replace it to GPL-2.0 OR GFDL-1.1-or-later WITH no-invariant-sections |
| 26 | |
| 27 | .. _request-func-close: |
| 28 | |
| 29 | *************** |
| 30 | request close() |
| 31 | *************** |
| 32 | |
| 33 | Name |
| 34 | ==== |
| 35 | |
| 36 | request-close - Close a request file descriptor |
| 37 | |
| 38 | |
| 39 | Synopsis |
| 40 | ======== |
| 41 | |
| 42 | .. code-block:: c |
| 43 | |
| 44 | #include <unistd.h> |
| 45 | |
| 46 | |
| 47 | .. c:function:: int close( int fd ) |
| 48 | :name: req-close |
| 49 | |
| 50 | Arguments |
| 51 | ========= |
| 52 | |
| 53 | ``fd`` |
| 54 | File descriptor returned by :ref:`MEDIA_IOC_REQUEST_ALLOC`. |
| 55 | |
| 56 | |
| 57 | Description |
| 58 | =========== |
| 59 | |
| 60 | Closes the request file descriptor. Resources associated with the request |
| 61 | are freed once all file descriptors associated with the request are closed |
| 62 | and the driver has completed the request. |
| 63 | See :ref:`here <media-request-life-time>` for more information. |
| 64 | |
| 65 | |
| 66 | Return Value |
| 67 | ============ |
| 68 | |
| 69 | :ref:`close() <request-func-close>` returns 0 on success. On error, -1 is |
| 70 | returned, and ``errno`` is set appropriately. Possible error codes are: |
| 71 | |
| 72 | EBADF |
| 73 | ``fd`` is not a valid open file descriptor. |