1.. Permission is granted to copy, distribute and/or modify this 2.. document under the terms of the GNU Free Documentation License, 3.. Version 1.1 or any later version published by the Free Software 4.. Foundation, with no Invariant Sections, no Front-Cover Texts 5.. and no Back-Cover Texts. A copy of the license is included at 6.. Documentation/userspace-api/media/fdl-appendix.rst. 7.. 8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections 9 10.. _FE_GET_FRONTEND: 11 12*************** 13FE_GET_FRONTEND 14*************** 15 16Name 17==== 18 19FE_GET_FRONTEND 20 21.. attention:: This ioctl is deprecated. 22 23 24Synopsis 25======== 26 27.. c:function:: int ioctl(int fd, FE_GET_FRONTEND, struct dvb_frontend_parameters *p) 28 :name: FE_GET_FRONTEND 29 30 31Arguments 32========= 33 34``fd`` 35 File descriptor returned by :c:func:`open() <dvb-fe-open>`. 36 37 38``p`` 39 Points to parameters for tuning operation. 40 41 42Description 43=========== 44 45This ioctl call queries the currently effective frontend parameters. For 46this command, read-only access to the device is sufficient. 47 48 49Return Value 50============ 51 52On success 0 is returned. 53 54On error -1 is returned, and the ``errno`` variable is set 55appropriately. 56 57.. flat-table:: 58 :header-rows: 0 59 :stub-columns: 0 60 61 62 - .. row 1 63 64 - ``EINVAL`` 65 66 - Maximum supported symbol rate reached. 67 68Generic error codes are described at the 69:ref:`Generic Error Codes <gen-errors>` chapter. 70