man: add description of all the sd-hwdb funtions
This commit is contained in:
parent
21dc5e82ad
commit
ec7ea47dae
|
@ -107,6 +107,7 @@ manpages = [
|
||||||
'SD_WARNING'],
|
'SD_WARNING'],
|
||||||
''],
|
''],
|
||||||
['sd-event', '3', [], ''],
|
['sd-event', '3', [], ''],
|
||||||
|
['sd-hwdb', '3', [], ''],
|
||||||
['sd-id128',
|
['sd-id128',
|
||||||
'3',
|
'3',
|
||||||
['SD_ID128_CONST_STR',
|
['SD_ID128_CONST_STR',
|
||||||
|
@ -559,6 +560,8 @@ manpages = [
|
||||||
'3',
|
'3',
|
||||||
['sd_get_machine_names', 'sd_get_sessions', 'sd_get_uids'],
|
['sd_get_machine_names', 'sd_get_sessions', 'sd_get_uids'],
|
||||||
'HAVE_PAM'],
|
'HAVE_PAM'],
|
||||||
|
['sd_hwdb_get', '3', ['sd_hwdb_enumerate', 'sd_hwdb_seek'], ''],
|
||||||
|
['sd_hwdb_new', '3', ['sd_hwdb_ref', 'sd_hwdb_unref'], ''],
|
||||||
['sd_id128_get_machine',
|
['sd_id128_get_machine',
|
||||||
'3',
|
'3',
|
||||||
['sd_id128_get_boot',
|
['sd_id128_get_boot',
|
||||||
|
|
57
man/sd-hwdb.xml
Normal file
57
man/sd-hwdb.xml
Normal file
|
@ -0,0 +1,57 @@
|
||||||
|
<?xml version='1.0'?>
|
||||||
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
||||||
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||||
|
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||||
|
|
||||||
|
<refentry id="sd-hwdb" xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||||
|
|
||||||
|
<refentryinfo>
|
||||||
|
<title>sd-hwdb</title>
|
||||||
|
<productname>systemd</productname>
|
||||||
|
</refentryinfo>
|
||||||
|
|
||||||
|
<refmeta>
|
||||||
|
<refentrytitle>sd-hwdb</refentrytitle>
|
||||||
|
<manvolnum>3</manvolnum>
|
||||||
|
</refmeta>
|
||||||
|
|
||||||
|
<refnamediv>
|
||||||
|
<refname>sd-hwdb</refname>
|
||||||
|
<refpurpose>Read-only access to the hardware description database</refpurpose>
|
||||||
|
</refnamediv>
|
||||||
|
|
||||||
|
<refsynopsisdiv>
|
||||||
|
<funcsynopsis>
|
||||||
|
<funcsynopsisinfo>#include <systemd/sd-hwdb.h></funcsynopsisinfo>
|
||||||
|
</funcsynopsis>
|
||||||
|
|
||||||
|
<cmdsynopsis>
|
||||||
|
<command>pkg-config --cflags --libs libsystemd</command>
|
||||||
|
</cmdsynopsis>
|
||||||
|
|
||||||
|
</refsynopsisdiv>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Description</title>
|
||||||
|
|
||||||
|
<para><filename>sd-hwdb.h</filename> allows read-only access the systemd database of hardware properties.
|
||||||
|
See <citerefentry><refentrytitle>hwdb</refentrytitle><manvolnum>7</manvolnum></citerefentry> and
|
||||||
|
<citerefentry><refentrytitle>systemd-hwdb</refentrytitle><manvolnum>8</manvolnum></citerefentry> for more
|
||||||
|
information about the database.</para>
|
||||||
|
|
||||||
|
<para>See <citerefentry><refentrytitle>sd_hwdb_new</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||||
|
and <citerefentry><refentrytitle>sd_hwdb_get</refentrytitle><manvolnum>3</manvolnum></citerefentry> for
|
||||||
|
information about the functions available.</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>See Also</title>
|
||||||
|
<para>
|
||||||
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>systemd-udevd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
||||||
|
</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
</refentry>
|
132
man/sd_hwdb_get.xml
Normal file
132
man/sd_hwdb_get.xml
Normal file
|
@ -0,0 +1,132 @@
|
||||||
|
<?xml version='1.0'?>
|
||||||
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
||||||
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||||
|
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||||
|
|
||||||
|
<refentry id="sd_hwdb_get" xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||||
|
<refentryinfo>
|
||||||
|
<title>sd_hwdb_get</title>
|
||||||
|
<productname>systemd</productname>
|
||||||
|
</refentryinfo>
|
||||||
|
|
||||||
|
<refmeta>
|
||||||
|
<refentrytitle>sd_hwdb_get</refentrytitle>
|
||||||
|
<manvolnum>3</manvolnum>
|
||||||
|
</refmeta>
|
||||||
|
|
||||||
|
<refnamediv>
|
||||||
|
<refname>sd_hwdb_get</refname>
|
||||||
|
<refname>sd_hwdb_seek</refname>
|
||||||
|
<refname>sd_hwdb_enumerate</refname>
|
||||||
|
|
||||||
|
<refpurpose>Seek to a location in hwdb or access entries</refpurpose>
|
||||||
|
</refnamediv>
|
||||||
|
|
||||||
|
<refsynopsisdiv>
|
||||||
|
<funcsynopsis>
|
||||||
|
<funcsynopsisinfo>#include <systemd/sd-hwdb.h></funcsynopsisinfo>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>int <function>sd_hwdb_get</function></funcdef>
|
||||||
|
<paramdef>sd_hwdb *<parameter>hwdb</parameter></paramdef>
|
||||||
|
<paramdef>const char *<parameter>modalias</parameter></paramdef>
|
||||||
|
<paramdef>const char *<parameter>key</parameter></paramdef>
|
||||||
|
<paramdef>const char **<parameter>value</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>int <function>sd_hwdb_seek</function></funcdef>
|
||||||
|
<paramdef>sd_hwdb *<parameter>hwdb</parameter></paramdef>
|
||||||
|
<paramdef>const char *<parameter>modalias</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>int <function>sd_hwdb_enumerate</function></funcdef>
|
||||||
|
<paramdef>sd_hwdb *<parameter>hwdb</parameter></paramdef>
|
||||||
|
<paramdef>const char **<parameter>key</parameter></paramdef>
|
||||||
|
<paramdef>const char **<parameter>value</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
|
||||||
|
</funcsynopsis>
|
||||||
|
</refsynopsisdiv>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Description</title>
|
||||||
|
|
||||||
|
<para><function>sd_hwdb_get()</function> queries the <parameter>hwdb</parameter> object created earlier
|
||||||
|
with <citerefentry><refentrytitle>sd_hwdb_new</refentrytitle><manvolnum>3</manvolnum></citerefentry> for
|
||||||
|
entries matching the specified string <parameter>modalias</parameter>, and returns the value
|
||||||
|
corresponding to the the key <parameter>key</parameter>. The value is returned as a
|
||||||
|
<constant>NUL</constant>-terminated string in <parameter>value</parameter>. It must not be modified by
|
||||||
|
the caller and is valid as long as a reference to <parameter>hwdb</parameter> is kept. When multiple
|
||||||
|
patterns in the database match <parameter>modalias</parameter>, the one with the highest priority is
|
||||||
|
used. See <citerefentry><refentrytitle>hwdb</refentrytitle><manvolnum>7</manvolnum></citerefentry> for
|
||||||
|
details.</para>
|
||||||
|
|
||||||
|
<para><function>sd_hwdb_seek()</function> selects entries matching the specified string
|
||||||
|
<parameter>modalias</parameter>. Subsequent queries with <function>sd_hwdb_enumerate()</function> will
|
||||||
|
access the key-value pairs for that string.</para>
|
||||||
|
|
||||||
|
<para><function>sd_hwdb_enumerate()</function> returns (in turn) all the key-value pairs defined for the
|
||||||
|
string used with <function>sd_hwdb_seek()</function>. Each pair is returned as
|
||||||
|
<constant>NUL</constant>-terminated strings in <parameter>key</parameter> and
|
||||||
|
<parameter>value</parameter>. The strings must not be modified by the caller and are valid as long as a
|
||||||
|
reference to <parameter>hwdb</parameter> is kept. When multiple patterns in the database match
|
||||||
|
<parameter>modalias</parameter>, the combination of all matching key-value pairs is used. See
|
||||||
|
<citerefentry><refentrytitle>hwdb</refentrytitle><manvolnum>7</manvolnum></citerefentry> for
|
||||||
|
details.</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Return Value</title>
|
||||||
|
|
||||||
|
<para>On success, <function>sd_hwdb_get()</function> and <function>sd_hwdb_seek()</function> return a
|
||||||
|
non-negative integer. On failure, they return a negative errno-style error code.</para>
|
||||||
|
|
||||||
|
<para><function>sd_hwdb_enumerate()</function> returns a positive integer if another key-value pair was found or zero if
|
||||||
|
all entries have already been enumerated. On failure, it returns a negative errno-style error code.
|
||||||
|
</para>
|
||||||
|
|
||||||
|
<refsect2>
|
||||||
|
<title>Errors</title>
|
||||||
|
|
||||||
|
<para>Returned errors may indicate the following problems:</para>
|
||||||
|
|
||||||
|
<variablelist>
|
||||||
|
<varlistentry>
|
||||||
|
<term><constant>-EINVAL</constant></term>
|
||||||
|
|
||||||
|
<listitem><para>A parameter is <constant>NULL</constant>.</para></listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term><constant>-ENOENT</constant></term>
|
||||||
|
|
||||||
|
<listitem><para>An entry for the specified <parameter>modalias</parameter> was not found.
|
||||||
|
</para></listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term><constant>-EAGAIN</constant></term>
|
||||||
|
|
||||||
|
<listitem><para><function>sd_hwdb_seek()</function> was not called before
|
||||||
|
<function>sd_hwdb_enumerate()</function>.</para></listitem>
|
||||||
|
</varlistentry>
|
||||||
|
</variablelist>
|
||||||
|
</refsect2>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>See Also</title>
|
||||||
|
|
||||||
|
<para>
|
||||||
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>systemd-udev.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>sd-hwdb</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>systemd-hwdb</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
||||||
|
</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
</refentry>
|
121
man/sd_hwdb_new.xml
Normal file
121
man/sd_hwdb_new.xml
Normal file
|
@ -0,0 +1,121 @@
|
||||||
|
<?xml version='1.0'?>
|
||||||
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
||||||
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||||||
|
<!-- SPDX-License-Identifier: LGPL-2.1+ -->
|
||||||
|
|
||||||
|
<refentry id="sd_hwdb_new" xmlns:xi="http://www.w3.org/2001/XInclude">
|
||||||
|
<refentryinfo>
|
||||||
|
<title>sd_hwdb_new</title>
|
||||||
|
<productname>systemd</productname>
|
||||||
|
</refentryinfo>
|
||||||
|
|
||||||
|
<refmeta>
|
||||||
|
<refentrytitle>sd_hwdb_new</refentrytitle>
|
||||||
|
<manvolnum>3</manvolnum>
|
||||||
|
</refmeta>
|
||||||
|
|
||||||
|
<refnamediv>
|
||||||
|
<refname>sd_hwdb_new</refname>
|
||||||
|
<refname>sd_hwdb_ref</refname>
|
||||||
|
<refname>sd_hwdb_unref</refname>
|
||||||
|
|
||||||
|
<refpurpose>Create a new hwdb object and create or destroy references to it</refpurpose>
|
||||||
|
</refnamediv>
|
||||||
|
|
||||||
|
<refsynopsisdiv>
|
||||||
|
<funcsynopsis>
|
||||||
|
<funcsynopsisinfo>#include <systemd/sd-hwdb.h></funcsynopsisinfo>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>int <function>sd_hwdb_new</function></funcdef>
|
||||||
|
<paramdef>sd_hwdb **<parameter>hwdb</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>sd_hwdb* <function>sd_hwdb_ref</function></funcdef>
|
||||||
|
<paramdef>sd_hwdb *<parameter>hwdb</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
|
||||||
|
<funcprototype>
|
||||||
|
<funcdef>sd_hwdb* <function>sd_hwdb_unref</function></funcdef>
|
||||||
|
<paramdef>sd_hwdb *<parameter>hwdb</parameter></paramdef>
|
||||||
|
</funcprototype>
|
||||||
|
</funcsynopsis>
|
||||||
|
</refsynopsisdiv>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Description</title>
|
||||||
|
|
||||||
|
<para><function>sd_hwdb_new()</function> creates a new hwdb object to access the binary hwdb
|
||||||
|
database. Upon initialization, the file containing the binary representation of the hardware database is
|
||||||
|
located and opened. The new object is returned in <parameter>hwdb</parameter>.</para>
|
||||||
|
|
||||||
|
<para>The <parameter>hwdb</parameter> object is reference counted. <function>sd_hwdb_ref()</function> and
|
||||||
|
<function>sd_hwdb_unref()</function> may be used to get a new reference or destroy an existing reference
|
||||||
|
to an object. The caller must dispose of the reference acquired with <function>sd_hwdb_new()</function>
|
||||||
|
by calling <function>sd_hwdb_unref()</function> when done with the object.</para>
|
||||||
|
|
||||||
|
<para>Use
|
||||||
|
<citerefentry><refentrytitle>sd_hwdb_seek</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>sd_hwdb_get</refentrytitle><manvolnum>3</manvolnum></citerefentry>, and
|
||||||
|
<citerefentry><refentrytitle>sd_hwdb_enumerate</refentrytitle><manvolnum>3</manvolnum></citerefentry> to
|
||||||
|
access entries.</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>Return Value</title>
|
||||||
|
|
||||||
|
<para>On success, <function>sd_hwdb_new()</function> returns a non-negative integer. On
|
||||||
|
failure, it returns a negative errno-style error code.</para>
|
||||||
|
|
||||||
|
<para><function>sd_hwdb_ref()</function> always returns the argument.
|
||||||
|
</para>
|
||||||
|
|
||||||
|
<para><function>sd_hwdb_unref()</function> always returns <constant>NULL</constant>.
|
||||||
|
</para>
|
||||||
|
|
||||||
|
<refsect2>
|
||||||
|
<title>Errors</title>
|
||||||
|
|
||||||
|
<para>Returned errors may indicate the following problems:</para>
|
||||||
|
|
||||||
|
<variablelist>
|
||||||
|
<varlistentry>
|
||||||
|
<term><constant>-ENOENT</constant></term>
|
||||||
|
|
||||||
|
<listitem><para>The binary hardware database file could not be located. See
|
||||||
|
<citerefentry><refentrytitle>systemd-hwdb</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
||||||
|
for more information.</para>
|
||||||
|
</listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term><constant>-EINVAL</constant></term>
|
||||||
|
|
||||||
|
<listitem><para>The located binary hardware database file is in an incompatible format.
|
||||||
|
</para></listitem>
|
||||||
|
</varlistentry>
|
||||||
|
|
||||||
|
<varlistentry>
|
||||||
|
<term><constant>-ENOMEM</constant></term>
|
||||||
|
|
||||||
|
<listitem><para>Memory allocation failed.</para></listitem>
|
||||||
|
</varlistentry>
|
||||||
|
</variablelist>
|
||||||
|
</refsect2>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
<xi:include href="libsystemd-pkgconfig.xml" />
|
||||||
|
|
||||||
|
<refsect1>
|
||||||
|
<title>See Also</title>
|
||||||
|
|
||||||
|
<para>
|
||||||
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>systemd-udev.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>sd-hwdb</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||||||
|
<citerefentry><refentrytitle>systemd-hwdb</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||||||
|
</para>
|
||||||
|
</refsect1>
|
||||||
|
|
||||||
|
</refentry>
|
Loading…
Reference in a new issue