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man: briefly document the resolvconf(8) compatibility interface

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Lennart Poettering 2018-02-27 19:48:06 +01:00
parent 088c136384
commit 2eee2088d2
2 changed files with 93 additions and 3 deletions
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2
man/rules/meson.build
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@ -612,7 +612,7 @@ manpages = [
'ENABLE_RANDOMSEED'],
['systemd-rc-local-generator', '8', [], ''],
['systemd-remount-fs.service', '8', ['systemd-remount-fs'], ''],
['systemd-resolve', '1', [], 'ENABLE_RESOLVE'],
['systemd-resolve', '1', ['resolvconf'], 'ENABLE_RESOLVE'],
['systemd-resolved.service', '8', ['systemd-resolved'], 'ENABLE_RESOLVE'],
['systemd-rfkill.service',
'8',

94
man/systemd-resolve.xml
View file

@ -47,7 +47,8 @@
<refnamediv>
<refname>systemd-resolve</refname>
<refpurpose>Resolve domain names, IPV4 and IPv6 addresses, DNS resource records, and services</refpurpose>
<refname>resolvconf</refname>
<refpurpose>Resolve domain names, IPV4 and IPv6 addresses, DNS resource records, and services; introspect and reconfigure the DNS resolver</refpurpose>
</refnamediv>
<refsynopsisdiv>
@ -134,6 +135,18 @@
<command> --revert</command>
</cmdsynopsis>
<cmdsynopsis>
<command>resolvconf</command>
<arg choice="opt" rep="repeat">OPTIONS</arg>
<command> -a <replaceable>INTERFACE</replaceable> &lt; <replaceable>FILE</replaceable></command>
</cmdsynopsis>
<cmdsynopsis>
<command>resolvconf</command>
<arg choice="opt" rep="repeat">OPTIONS</arg>
<command> -d <replaceable>INTERFACE</replaceable></command>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
@ -399,6 +412,82 @@
</variablelist>
</refsect1>
<refsect1>
<title>Compatibility with <citerefentry><refentrytitle>resolvconf</refentrytitle><manvolnum>8</manvolnum></citerefentry></title>
<para><command>systemd-resolve</command> is a multi-call binary. When invoked as <literal>resolvconf</literal>
(generally achieved by means of a symbolic link of this name to the <command>systemd-resolve</command> binary) it
is run in a limited <citerefentry><refentrytitle>resolvconf</refentrytitle><manvolnum>8</manvolnum></citerefentry>
compatibility mode. It accepts mostly the same arguments and pushes all data into
<citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
similar to how <option>--set-dns=</option> and <option>--set-domain=</option> operate. Note that
<command>systemd-resolved.service</command> is the only supported backend, which is different from other
implementations of this command. Note that not all operations supported by other implementations are supported
natively. Specifically:</para>
<variablelist>
<varlistentry>
<term><option>-a</option></term>
<listitem><para>Registers per-interface DNS configuration data with
<command>systemd-resolved</command>. Expects a network interface name as only command line argument. Reads
<citerefentry><refentrytitle>resolv.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry> compatible DNS
configuration data from its standard input. Relevant fields are <literal>nameserver</literal> and
<literal>domain</literal>/<literal>search</literal>. This command is mostly identical to invoking
<command>systemd-resolve</command> with a combination of <option>--set-dns=</option> and
<option>--set-domain=</option>.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>-d</option></term>
<listitem><para>Unregisters per-interface DNS configuration data with <command>systemd-resolved</command>. This
command is mostly identical to invoking <command>systemd-resolve</command> with
<option>--revert</option>.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>-f</option></term>
<listitem><para>When specified <option>-a</option> and <option>-d</option> will not complain about missing
network interfaces and will silently execute no operation in that case.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>-x</option></term>
<listitem><para>This switch for "exclusive" operation is supported only partially. It is mapped to an
additional configured search domain of <literal>~.</literal> — i.e. ensures that DNS traffic is preferably
routed to the DNS servers on this interface, unless there are other, more specific domains configured on other
interfaces.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>-m</option></term>
<term><option>-p</option></term>
<listitem><para>These switches are not supported and are silently ignored.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>-u</option></term>
<term><option>-I</option></term>
<term><option>-i</option></term>
<term><option>-l</option></term>
<term><option>-R</option></term>
<term><option>-r</option></term>
<term><option>-v</option></term>
<term><option>-V</option></term>
<term><option>--enable-updates</option></term>
<term><option>--disable-updates</option></term>
<term><option>--are-updates-enabled</option></term>
<listitem><para>These switches are not supported and the command will fail if used.</para></listitem>
</varlistentry>
</variablelist>
<para>See <citerefentry><refentrytitle>resolvconf</refentrytitle><manvolnum>8</manvolnum></citerefentry> for details on this command line options.</para>
</refsect1>
<refsect1>
<title>Examples</title>
@ -477,7 +566,8 @@ _443._tcp.fedoraproject.org IN TLSA 0 0 1 19400be5b7a31fb733917700789d2f0a2471c0
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.dnssd</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
<citerefentry><refentrytitle>systemd-networkd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
<citerefentry><refentrytitle>resolvconf</refentrytitle><manvolnum>8</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>