<refentry id="FE_GET_PROPERTY"> <refmeta> <refentrytitle>ioctl FE_SET_PROPERTY, FE_GET_PROPERTY</refentrytitle> &manvol; </refmeta> <refnamediv> <refname>FE_SET_PROPERTY</refname> <refname>FE_GET_PROPERTY</refname> <refpurpose>FE_SET_PROPERTY sets one or more frontend properties. FE_GET_PROPERTY returns one or more frontend properties.</refpurpose> </refnamediv> <refsynopsisdiv> <funcsynopsis> <funcprototype> <funcdef>int <function>ioctl</function></funcdef> <paramdef>int <parameter>fd</parameter></paramdef> <paramdef>int <parameter>request</parameter></paramdef> <paramdef>struct dtv_properties *<parameter>argp</parameter></paramdef> </funcprototype> </funcsynopsis> </refsynopsisdiv> <refsect1> <title>Arguments</title> <variablelist> <varlistentry> <term><parameter>fd</parameter></term> <listitem> <para>&fe_fd;</para> </listitem> </varlistentry> <varlistentry> <term><parameter>request</parameter></term> <listitem> <para>FE_SET_PROPERTY, FE_GET_PROPERTY</para> </listitem> </varlistentry> <varlistentry> <term><parameter>argp</parameter></term> <listitem> <para>pointer to &dtv-properties;</para> </listitem> </varlistentry> </variablelist> </refsect1> <refsect1> <title>Description</title> <para>All DVB frontend devices support the <constant>FE_SET_PROPERTY</constant> and <constant>FE_GET_PROPERTY</constant> ioctls. The supported properties and statistics depends on the delivery system and on the device:</para> <itemizedlist> <listitem> <para><constant>FE_SET_PROPERTY:</constant></para> <itemizedlist> <listitem><para>This ioctl is used to set one or more frontend properties.</para></listitem> <listitem><para>This is the basic command to request the frontend to tune into some frequency and to start decoding the digital TV signal.</para></listitem> <listitem><para>This call requires read/write access to the device.</para></listitem> <listitem><para>At return, the values are updated to reflect the actual parameters used.</para></listitem> </itemizedlist> </listitem> <listitem> <para><constant>FE_GET_PROPERTY:</constant></para> <itemizedlist> <listitem><para>This ioctl is used to get properties and statistics from the frontend.</para></listitem> <listitem><para>No properties are changed, and statistics aren't reset.</para></listitem> <listitem><para>This call only requires read-only access to the device.</para></listitem> </itemizedlist> </listitem> </itemizedlist> &return-value-dvb; </refsect1> </refentry>