@@ -59,11 +59,54 @@ specification is available at
<section id="frontend_fcalls">
<title>Frontend Function Calls</title>
-<section id="frontend_f_open">
-<title>open()</title>
-<para>DESCRIPTION</para>
-<informaltable><tgroup cols="1"><tbody><row>
-<entry align="char">
+<refentry id="frontend_f_open">
+ <refmeta>
+ <refentrytitle>open()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>fe-open</refname>
+ <refpurpose>Open a frontend device</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include <fcntl.h></funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>int <function>open</function></funcdef>
+ <paramdef>const char *<parameter>device_name</parameter></paramdef>
+ <paramdef>int <parameter>flags</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>device_name</parameter></term>
+ <listitem>
+ <para>Device to be opened.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>flags</parameter></term>
+ <listitem>
+ <para>Open flags. Access mode must be
+<constant>O_RDWR</constant>. This is just a technicality, input devices
+still support only reading and output devices only writing.</para>
+ <para>When the <constant>O_NONBLOCK</constant> flag is
+given, the read() function will return the &EAGAIN; when no data is available,
+otherwise these functions block until data becomes
+available. Other flags have no effect.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+ <refsect1>
+ <title>Description</title>
<para>This system call opens a named frontend device (/dev/dvb/adapter0/frontend0)
for subsequent use. Usually the first thing to do after a successful open is to
find out the frontend type with <link linkend="FE_GET_INFO">FE_GET_INFO</link>.</para>
@@ -82,127 +125,121 @@ specification is available at
for use in the specified mode. This implies that the corresponding hardware is
powered up, and that other front-ends may have been powered down to make
that possible.</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-
-<para>SYNOPSIS</para>
-<informaltable><tgroup cols="1"><tbody><row><entry
- align="char">
-<para>int open(const char ⋆deviceName, int flags);</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-<para>PARAMETERS
-</para>
-<informaltable><tgroup cols="2"><tbody><row><entry
- align="char">
-<para>const char
- *deviceName</para>
-</entry><entry
- align="char">
-<para>Name of specific video device.</para>
-</entry>
- </row><row><entry
- align="char">
-<para>int flags</para>
-</entry><entry
- align="char">
-<para>A bit-wise OR of the following flags:</para>
-</entry>
- </row><row><entry
- align="char">
-</entry><entry
- align="char">
-<para>O_RDONLY read-only access</para>
-</entry>
- </row><row><entry
- align="char">
-</entry><entry
- align="char">
-<para>O_RDWR read/write access</para>
-</entry>
- </row><row><entry
- align="char">
-</entry><entry
- align="char">
-<para>O_NONBLOCK open in non-blocking mode</para>
-</entry>
- </row><row><entry
- align="char">
-</entry><entry
- align="char">
-<para>(blocking mode is the default)</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-<para>RETURN VALUE</para>
-<informaltable><tgroup cols="2"><tbody><row><entry
- align="char">
-<para>ENODEV</para>
-</entry><entry
- align="char">
-<para>Device driver not loaded/available.</para>
-</entry>
- </row><row><entry
- align="char">
-<para>EINTERNAL</para>
-</entry><entry
- align="char">
-<para>Internal error.</para>
-</entry>
- </row><row><entry
- align="char">
-<para>EBUSY</para>
-</entry><entry
- align="char">
-<para>Device or resource busy.</para>
-</entry>
- </row><row><entry
- align="char">
-<para>EINVAL</para>
-</entry><entry
- align="char">
-<para>Invalid argument.</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-</section>
+ </refsect1>
-<section id="frontend_f_close">
-<title>close()</title>
-<para>DESCRIPTION
-</para>
-<informaltable><tgroup cols="1"><tbody><row><entry
- align="char">
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>On success <function>open</function> returns the new file
+descriptor. On error -1 is returned, and the <varname>errno</varname>
+variable is set appropriately. Possible error codes are:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EACCES</errorcode></term>
+ <listitem>
+ <para>The caller has no permission to access the
+device.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EBUSY</errorcode></term>
+ <listitem>
+ <para>The driver does not support multiple opens and the
+device is already in use.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENXIO</errorcode></term>
+ <listitem>
+ <para>No device corresponding to this device special file
+exists.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENOMEM</errorcode></term>
+ <listitem>
+ <para>Not enough kernel memory was available to complete the
+request.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>EMFILE</errorcode></term>
+ <listitem>
+ <para>The process already has the maximum number of
+files open.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><errorcode>ENFILE</errorcode></term>
+ <listitem>
+ <para>The limit on the total number of files open on the
+system has been reached.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
+
+<refentry id="frontend_f_close">
+ <refmeta>
+ <refentrytitle>close()</refentrytitle>
+ &manvol;
+ </refmeta>
+
+ <refnamediv>
+ <refname>fe-close</refname>
+ <refpurpose>Close a frontend device</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include <unistd.h></funcsynopsisinfo>
+ <funcprototype>
+ <funcdef>int <function>close</function></funcdef>
+ <paramdef>int <parameter>fd</parameter></paramdef>
+ </funcprototype>
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Arguments</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>fd</parameter></term>
+ <listitem>
+ <para>&fd;</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
<para>This system call closes a previously opened front-end device. After closing
a front-end device, its corresponding hardware might be powered down
automatically.</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-<para>SYNOPSIS
-</para>
-<informaltable><tgroup cols="1"><tbody><row><entry
- align="char">
-<para>int close(int fd);</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-<para>PARAMETERS
-</para>
-<informaltable><tgroup cols="2"><tbody><row><entry
- align="char">
-<para>int fd</para>
-</entry><entry
- align="char">
-<para>File descriptor returned by a previous call to open().</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-<para>RETURN VALUE</para>
-<informaltable><tgroup cols="2"><tbody><row><entry
- align="char">
-<para>EBADF</para>
-</entry><entry
- align="char">
-<para>fd is not a valid open file descriptor.</para>
-</entry>
- </row></tbody></tgroup></informaltable>
-</section>
+</refsect1>
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>The function returns <returnvalue>0</returnvalue> on
+success, <returnvalue>-1</returnvalue> on failure and the
+<varname>errno</varname> is set appropriately. Possible error
+codes:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><errorcode>EBADF</errorcode></term>
+ <listitem>
+ <para><parameter>fd</parameter> is not a valid open file
+descriptor.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+</refentry>
&sub-fe-get-info;
&sub-fe-read-status;