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- .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
- .. c:namespace:: DTV.fe
- .. _FE_GET_INFO:
- *****************
- ioctl FE_GET_INFO
- *****************
- Name
- ====
- FE_GET_INFO - Query Digital TV frontend capabilities and returns information
- about the - front-end. This call only requires read-only access to the device.
- Synopsis
- ========
- .. c:macro:: FE_GET_INFO
- ``int ioctl(int fd, FE_GET_INFO, struct dvb_frontend_info *argp)``
- Arguments
- =========
- ``fd``
- File descriptor returned by :c:func:`open()`.
- ``argp``
- pointer to struct :c:type:`dvb_frontend_info`
- Description
- ===========
- All Digital TV frontend devices support the :ref:`FE_GET_INFO` ioctl. It is
- used to identify kernel devices compatible with this specification and to
- obtain information about driver and hardware capabilities. The ioctl
- takes a pointer to dvb_frontend_info which is filled by the driver.
- When the driver is not compatible with this specification the ioctl
- returns an error.
- frontend capabilities
- =====================
- Capabilities describe what a frontend can do. Some capabilities are
- supported only on some specific frontend types.
- The frontend capabilities are described at :c:type:`fe_caps`.
- 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.
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