5.1. media open()¶
5.1.1. Name¶
media-open - Open a media device
5.1.2. Synopsis¶
#include <fcntl.h>
-
int open(const char *device_name, int flags)¶
5.1.3. Arguments¶
device_nameDevice to be opened.
flagsOpen flags. Access mode must be either
O_RDONLYorO_RDWR. Other flags have no effect.
5.1.4. 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.
5.1.5. 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.