4.1. media open()¶

4.1.1. Name¶

media-open - Open a media device

4.1.2. Synopsis¶

#include <fcntl.h>

int open(const char *device_name, int flags)¶

4.1.3. 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.

4.1.4. Description¶

To open a media device applications call 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.

4.1.5. Return Value¶

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.