2.1. cec open()¶
2.1.1. Name¶
cec-open - Open a cec device
2.1.2. Synopsis¶
#include <fcntl.h>
- 
int open(const char *device_name, int flags)¶
2.1.3. Arguments¶
- device_name
- Device to be opened. 
- flags
- Open flags. Access mode must be - O_RDWR.- When the - O_NONBLOCKflag is given, the CEC_RECEIVE and CEC_DQEVENT ioctls will return the- EAGAINerror code when no message or event is available, and ioctls CEC_TRANSMIT, CEC_ADAP_S_PHYS_ADDR and CEC_ADAP_S_LOG_ADDRS all return 0.- Other flags have no effect. 
2.1.4. Description¶
To open a cec 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.
2.1.5. Return Value¶
open() returns the new file descriptor on success. On error,
-1 is returned, and errno is set appropriately. Possible error codes
include:
- 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. 
- ENODEV
- Device not found or was removed.