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.