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Diffstat (limited to 'Documentation/linux_tv/media/dvb/FE_GET_FRONTEND.rst')
| -rw-r--r-- | Documentation/linux_tv/media/dvb/FE_GET_FRONTEND.rst | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/Documentation/linux_tv/media/dvb/FE_GET_FRONTEND.rst b/Documentation/linux_tv/media/dvb/FE_GET_FRONTEND.rst new file mode 100644 index 000000000000..30c85cf0423c --- /dev/null +++ b/Documentation/linux_tv/media/dvb/FE_GET_FRONTEND.rst @@ -0,0 +1,77 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _FE_GET_FRONTEND: + +*************** +FE_GET_FRONTEND +*************** + +DESCRIPTION + +This ioctl call queries the currently effective frontend parameters. For +this command, read-only access to the device is sufficient. + +SYNOPSIS + +int ioctl(int fd, int request = +:ref:`FE_GET_FRONTEND <FE_GET_FRONTEND>`, struct +dvb_frontend_parameters *p); + +PARAMETERS + + + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + + - .. row 1 + + - int fd + + - File descriptor returned by a previous call to open(). + + - .. row 2 + + - int request + + - Equals :ref:`FE_SET_FRONTEND <FE_SET_FRONTEND>` for this + command. + + - .. row 3 + + - struct dvb_frontend_parameters *p + + - Points to parameters for tuning operation. + + +RETURN VALUE + +On success 0 is returned, on error -1 and the ``errno`` variable is set +appropriately. The generic error codes are described at the +:ref:`Generic Error Codes <gen-errors>` chapter. + + + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + + - .. row 1 + + - EINVAL + + - Maximum supported symbol rate reached. + + + + +.. ------------------------------------------------------------------------------ +.. This file was automatically converted from DocBook-XML with the dbxml +.. library (https://github.com/return42/sphkerneldoc). The origin XML comes +.. from the linux kernel, refer to: +.. +.. * https://github.com/torvalds/linux/tree/master/Documentation/DocBook +.. ------------------------------------------------------------------------------ |