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_nameDevice to be opened.
flagsOpen flags. Access mode must be
O_RDWR.When the
O_NONBLOCKflag is given, the CEC_RECEIVE and CEC_DQEVENT ioctls will return theEAGAINerror 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:
EACCESThe requested access to the file is not allowed.
EMFILEThe process already has the maximum number of files open.
ENFILEThe system limit on the total number of open files has been reached.
ENOMEMInsufficient kernel memory was available.
ENXIONo device corresponding to this device special file exists.