2.4.4. ioctl FE_READ_STATUS¶
2.4.4.1. Name¶
FE_READ_STATUS - Returns status information about the front-end. This call only requires - read-only access to the device
2.4.4.3. Arguments¶
fd- File descriptor returned by
open(). status- pointer to a bitmask integer filled with the values defined by enum
fe_status.
2.4.4.4. Description¶
All Digital TV frontend devices support the FE_READ_STATUS ioctl. It is
used to check about the locking status of the frontend after being
tuned. The ioctl takes a pointer to an integer where the status will be
written.
Note
The size of status is actually sizeof(enum fe_status), with
varies according with the architecture. This needs to be fixed in the
future.
2.4.4.5. int fe_status¶
The fe_status parameter is used to indicate the current state and/or
state changes of the frontend hardware. It is produced using the enum
fe_status values on a bitmask
2.4.4.6. Return Value¶
On success 0 is returned.
On error -1 is returned, and the errno variable is set
appropriately.
Generic error codes are described at the Generic Error Codes chapter.