Based on kernel version 6.9
. Page generated on 2024-05-14 10:02 EST
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later .. c:namespace:: DTV.fe .. _FE_GET_PROPERTY: ************************************** ioctl FE_SET_PROPERTY, FE_GET_PROPERTY ************************************** Name ==== FE_SET_PROPERTY - FE_GET_PROPERTY - FE_SET_PROPERTY sets one or more frontend properties. - FE_GET_PROPERTY returns one or more frontend properties. Synopsis ======== .. c:macro:: FE_GET_PROPERTY ``int ioctl(int fd, FE_GET_PROPERTY, struct dtv_properties *argp)`` .. c:macro:: FE_SET_PROPERTY ``int ioctl(int fd, FE_SET_PROPERTY, struct dtv_properties *argp)`` Arguments ========= ``fd`` File descriptor returned by :c:func:`open()`. ``argp`` Pointer to struct :c:type:`dtv_properties`. Description =========== All Digital TV frontend devices support the ``FE_SET_PROPERTY`` and ``FE_GET_PROPERTY`` ioctls. The supported properties and statistics depends on the delivery system and on the device: - ``FE_SET_PROPERTY:`` - This ioctl is used to set one or more frontend properties. - This is the basic command to request the frontend to tune into some frequency and to start decoding the digital TV signal. - This call requires read/write access to the device. .. note:: At return, the values aren't updated to reflect the actual parameters used. If the actual parameters are needed, an explicit call to ``FE_GET_PROPERTY`` is needed. - ``FE_GET_PROPERTY:`` - This ioctl is used to get properties and statistics from the frontend. - No properties are changed, and statistics aren't reset. - This call only requires read-only access to the device. 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. |