.. 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 ` chapter.