cec-open — Open a cec device
#include <fcntl.h>
int open( | const char *device_name, |
int flags); |
device_nameDevice to be opened.
flagsOpen flags. Access mode must be O_RDWR.
When the O_NONBLOCK flag is
given, the CEC_RECEIVE ioctl will return EAGAIN error code when no message is
available, and the CEC_TRANSMIT, CEC_ADAP_S_PHYS_ADDR and
CEC_ADAP_S_LOG_ADDRS ioctls all act in non-blocking mode.
Other flags have no effect.
Note: this documents the proposed CEC API. This API is not yet finalized and is currently only available as a staging kernel module.
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.
open returns the new file descriptor on success.
On error, -1 is returned, and errno is set appropriately.
Possible error codes include:
The requested access to the file is not allowed.
The process already has the maximum number of files open.
The system limit on the total number of open files has been reached.
Insufficient kernel memory was available.
No device corresponding to this device special file exists.