mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.4 KiB
62 lines
1.4 KiB
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later |
|
.. c:namespace:: DTV.fe |
|
|
|
.. _FE_READ_STATUS: |
|
|
|
******************** |
|
ioctl FE_READ_STATUS |
|
******************** |
|
|
|
Name |
|
==== |
|
|
|
FE_READ_STATUS - Returns status information about the front-end. This call only requires - read-only access to the device |
|
|
|
Synopsis |
|
======== |
|
|
|
.. c:macro:: FE_READ_STATUS |
|
|
|
``int ioctl(int fd, FE_READ_STATUS, unsigned int *status)`` |
|
|
|
Arguments |
|
========= |
|
|
|
``fd`` |
|
File descriptor returned by :c:func:`open()`. |
|
|
|
``status`` |
|
pointer to a bitmask integer filled with the values defined by enum |
|
:c:type:`fe_status`. |
|
|
|
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. |
|
|
|
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 |
|
:c:type:`fe_status` values on a bitmask |
|
|
|
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 |
|
:ref:`Generic Error Codes <gen-errors>` chapter.
|
|
|