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59 lines
1.4 KiB
59 lines
1.4 KiB
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later |
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.. c:namespace:: DTV.fe |
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.. _FE_GET_INFO: |
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***************** |
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ioctl FE_GET_INFO |
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***************** |
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Name |
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==== |
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FE_GET_INFO - Query Digital TV frontend capabilities and returns information |
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about the - front-end. This call only requires read-only access to the device. |
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Synopsis |
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======== |
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.. c:macro:: FE_GET_INFO |
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``int ioctl(int fd, FE_GET_INFO, struct dvb_frontend_info *argp)`` |
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Arguments |
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========= |
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``fd`` |
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File descriptor returned by :c:func:`open()`. |
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``argp`` |
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pointer to struct :c:type:`dvb_frontend_info` |
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Description |
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=========== |
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All Digital TV frontend devices support the :ref:`FE_GET_INFO` ioctl. It is |
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used to identify kernel devices compatible with this specification and to |
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obtain information about driver and hardware capabilities. The ioctl |
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takes a pointer to dvb_frontend_info which is filled by the driver. |
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When the driver is not compatible with this specification the ioctl |
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returns an error. |
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frontend capabilities |
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===================== |
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Capabilities describe what a frontend can do. Some capabilities are |
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supported only on some specific frontend types. |
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The frontend capabilities are described at :c:type:`fe_caps`. |
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Return Value |
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============ |
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On success 0 is returned. |
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On error -1 is returned, and the ``errno`` variable is set |
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appropriately. |
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Generic error codes are described at the |
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:ref:`Generic Error Codes <gen-errors>` chapter.
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