.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later .. c:namespace:: DTV.dmx .. _DMX_SET_FILTER: ============== DMX_SET_FILTER ============== Name ---- DMX_SET_FILTER Synopsis -------- .. c:macro:: DMX_SET_FILTER ``int ioctl(int fd, DMX_SET_FILTER, struct dmx_sct_filter_params *params)`` Arguments --------- ``fd`` File descriptor returned by :c:func:`open()`. ``params`` Pointer to structure containing filter parameters. Description ----------- This ioctl call sets up a filter according to the filter and mask parameters provided. A timeout may be defined stating number of seconds to wait for a section to be loaded. A value of 0 means that no timeout should be applied. Finally there is a flag field where it is possible to state whether a section should be CRC-checked, whether the filter should be a ”one-shot” filter, i.e. if the filtering operation should be stopped after the first section is received, and whether the filtering operation should be started immediately (without waiting for a :ref:`DMX_START` ioctl call). If a filter was previously set-up, this filter will be canceled, and the receive buffer will be flushed. Return Value ------------ On success 0 is returned. On error -1 is returned, and the ``errno`` variable is set appropriately. The generic error codes are described at the :ref:`Generic Error Codes ` chapter.