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-.. Permission is granted to copy, distribute and/or modify this
-.. document under the terms of the GNU Free Documentation License,
-.. Version 1.1 or any later version published by the Free Software
-.. Foundation, with no Invariant Sections, no Front-Cover Texts
-.. and no Back-Cover Texts. A copy of the license is included at
-.. Documentation/media/uapi/fdl-appendix.rst.
-..
-.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
-
-.. _dmx_fopen:
-
-=======================
-Digital TV demux open()
-=======================
-
-Name
-----
-
-Digital TV demux open()
-
-
-Synopsis
---------
-
-.. c:function:: int open(const char *deviceName, int flags)
- :name: dvb-dmx-open
-
-Arguments
----------
-
-``name``
- Name of specific Digital TV demux device.
-
-``flags``
- A bit-wise OR of the following flags:
-
-.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
-
-.. flat-table::
- :header-rows: 0
- :stub-columns: 0
- :widths: 1 16
-
- -
- - ``O_RDONLY``
- - read-only access
-
- -
- - ``O_RDWR``
- - read/write access
-
- -
- - ``O_NONBLOCK``
- - open in non-blocking mode
- (blocking mode is the default)
-
-
-Description
------------
-
-This system call, used with a device name of ``/dev/dvb/adapter?/demux?``,
-allocates a new filter and returns a handle which can be used for
-subsequent control of that filter. This call has to be made for each
-filter to be used, i.e. every returned file descriptor is a reference to
-a single filter. ``/dev/dvb/adapter?/dvr?`` is a logical device to be used
-for retrieving Transport Streams for digital video recording. When
-reading from this device a transport stream containing the packets from
-all PES filters set in the corresponding demux device
-(``/dev/dvb/adapter?/demux?``) having the output set to ``DMX_OUT_TS_TAP``.
-A recorded Transport Stream is replayed by writing to this device.
-
-The significance of blocking or non-blocking mode is described in the
-documentation for functions where there is a difference. It does not
-affect the semantics of the ``open()`` call itself. A device opened
-in blocking mode can later be put into non-blocking mode (and vice versa)
-using the ``F_SETFL`` command of the fcntl system call.
-
-
-Return Value
-------------
-
-On success 0 is returned.
-
-On error -1 is returned, and the ``errno`` variable is set
-appropriately.
-
-.. tabularcolumns:: |p{2.5cm}|p{15.0cm}|
-
-.. flat-table::
- :header-rows: 0
- :stub-columns: 0
- :widths: 1 16
-
- - - ``EMFILE``
- - “Too many open files”, i.e. no more filters available.
-
-The generic error codes are described at the
-:ref:`Generic Error Codes <gen-errors>` chapter.