2.6.2.7. FE_GET_EVENT¶
2.6.2.7.1. Name¶
FE_GET_EVENT
2.6.2.7.2. Synopsis¶
-
int
ioctl
(int fd, int request = QPSK_GET_EVENT, struct dvb_frontend_event *ev)¶
2.6.2.7.3. Arguments¶
int fd | File descriptor returned by a previous call to open(). |
int request | Equals FE_GET_EVENT for this command. |
struct dvb_frontend_event *ev | Points to the location where the event, |
if any, is to be stored. |
2.6.2.7.4. Description¶
This ioctl call returns a frontend event if available. If an event is
not available, the behavior depends on whether the device is in blocking
or non-blocking mode. In the latter case, the call fails immediately
with errno set to EWOULDBLOCK
. In the former case, the call blocks until
an event becomes available.
2.6.2.7.5. Return Value¶
On success 0 is returned, on error -1 and the errno
variable is set
appropriately. The generic error codes are described at the
Generic Error Codes chapter.
EWOULDBLOCK |
There is no event pending, and the device is in non-blocking mode. |
EOVERFLOW |
Overflow in event queue - one or more events were lost. |