meson: allow building resolved and machined without nss modules

[thirdparty/systemd.git] / man / nss-mymachines.xml

diff --git a/man/nss-mymachines.xml b/man/nss-mymachines.xml
index 5fce1b1db4ed02155a2da936990e946ff3f50614..d9811b24cc5c8dab33c2636da005611ddabd32fe 100644 (file)
--- a/man/nss-mymachines.xml
+++ b/man/nss-mymachines.xml
@@ -3,38 +3,14 @@
   "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
 
 <!--
-  This file is part of systemd.
-
-  Copyright 2014 Lennart Poettering
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+  SPDX-License-Identifier: LGPL-2.1+
 -->
 
-<refentry id="nss-mymachines" conditional='ENABLE_MACHINED'>
+<refentry id="nss-mymachines" conditional='ENABLE_NSS_MYMACHINES'>
 
   <refentryinfo>
     <title>nss-mymachines</title>
     <productname>systemd</productname>
-
-    <authorgroup>
-      <author>
-        <contrib>Developer</contrib>
-        <firstname>Lennart</firstname>
-        <surname>Poettering</surname>
-        <email>lennart@poettering.net</email>
-      </author>
-    </authorgroup>
   </refentryinfo>
 
   <refmeta>
@@ -56,42 +32,37 @@
   <refsect1>
     <title>Description</title>
 
-    <para><command>nss-mymachines</command> is a plugin for the GNU
-    Name Service Switch (NSS) functionality of the GNU C Library
-    (<command>glibc</command>), providing hostname resolution for
-    container names of containers running locally that are registered
-    with
-    <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
-    The container names are resolved to the IP addresses of the
-    specific container, ordered by their scope.</para>
-
-    <para>The module also resolves user IDs used by containers to user
-    names indicating the container name, and back.</para>
-
-    <para>To activate the NSS modules, <literal>mymachines</literal>
-    has to be added to the lines starting with
-    <literal>hosts:</literal>, <literal>passwd:</literal> and
-    <literal>group:</literal> in
+    <para><command>nss-mymachines</command> is a plug-in module for the GNU Name Service Switch (NSS) functionality of
+    the GNU C Library (<command>glibc</command>), providing hostname resolution for the names of containers running
+    locally that are registered with
+    <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.  The
+    container names are resolved to the IP addresses of the specific container, ordered by their scope. This
+    functionality only applies to containers using network namespacing.</para>
+
+    <para>The module also resolves user and group IDs used by containers to user and group names indicating the
+    container name, and back. This functionality only applies to containers using user namespacing.</para>
+
+    <para>To activate the NSS module, add <literal>mymachines</literal> to the lines starting with
+    <literal>hosts:</literal>, <literal>passwd:</literal> and <literal>group:</literal> in
     <filename>/etc/nsswitch.conf</filename>.</para>
 
-    <para>It is recommended to place <literal>mymachines</literal>
-    near the end of the <filename>nsswitch.conf</filename> lines to
-    make sure that its mappings are only used as fallback, and that any
-    other mappings, such as DNS or <filename>/etc/hosts</filename>
-    based mappings, take precedence.</para>
+    <para>It is recommended to place <literal>mymachines</literal> after the <literal>files</literal> or
+    <literal>compat</literal> entry of the <filename>/etc/nsswitch.conf</filename> lines to make sure that its mappings
+    are preferred over other resolvers such as DNS, but so that <filename>/etc/hosts</filename>,
+    <filename>/etc/passwd</filename> and <filename>/etc/group</filename> based mappings take precedence.</para>
   </refsect1>
 
   <refsect1>
     <title>Example</title>
 
-    <para>Here's an example <filename>/etc/nsswitch.conf</filename>
-    file that enables <command>mymachines</command> correctly:</para>
+    <para>Here is an example <filename>/etc/nsswitch.conf</filename> file that enables
+    <command>nss-mymachines</command> correctly:</para>
 
-    <programlisting>passwd:         compat <command>mymachines</command>
-group:          compat <command>mymachines</command>
+    <programlisting>passwd:         compat <command>mymachines</command> systemd
+group:          compat <command>mymachines</command> systemd
 shadow:         compat
 
-hosts:          files resolve <command>mymachines</command> myhostname
+hosts:          files <command>mymachines</command> resolve [!UNAVAIL=return] dns myhostname
 networks:       files
 
 protocols:      db files
@@ -108,6 +79,7 @@ netgroup:       nis</programlisting>
     <para>
       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>systemd-machined.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>nss-systemd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>nss-resolve</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
       <citerefentry><refentrytitle>nss-myhostname</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
       <citerefentry project='man-pages'><refentrytitle>nsswitch.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,