Based on kernel version 6.11
. Page generated on 2024-09-24 08:21 EST
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later .. c:namespace:: MC .. _media-func-open: ************ media open() ************ Name ==== media-open - Open a media device Synopsis ======== .. code-block:: c #include <fcntl.h> .. c:function:: int open( const char *device_name, int flags ) Arguments ========= ``device_name`` Device to be opened. ``flags`` Open flags. Access mode must be either ``O_RDONLY`` or ``O_RDWR``. Other flags have no effect. Description =========== To open a media device applications call :c:func:`open()` with the desired device name. The function has no side effects; the device configuration remain unchanged. When the device is opened in read-only mode, attempts to modify its configuration will result in an error, and ``errno`` will be set to EBADF. Return Value ============ :c:func:`open()` returns the new file descriptor on success. On error, -1 is returned, and ``errno`` is set appropriately. Possible error codes are: EACCES The requested access to the file is not allowed. EMFILE The process already has the maximum number of files open. ENFILE The system limit on the total number of open files has been reached. ENOMEM Insufficient kernel memory was available. ENXIO No device corresponding to this device special file exists. |