diff options
Diffstat (limited to 'src/nss-systemd/nss-systemd.xml')
| -rw-r--r-- | src/nss-systemd/nss-systemd.xml | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/src/nss-systemd/nss-systemd.xml b/src/nss-systemd/nss-systemd.xml new file mode 100644 index 0000000000..71aed4df83 --- /dev/null +++ b/src/nss-systemd/nss-systemd.xml @@ -0,0 +1,111 @@ +<?xml version='1.0'?> <!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> + +<!-- + This file is part of systemd. + + Copyright 2016 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/>. +--> + +<refentry id="nss-systemd"> + + <refentryinfo> + <title>nss-systemd</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Lennart</firstname> + <surname>Poettering</surname> + <email>lennart@poettering.net</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>nss-systemd</refentrytitle> + <manvolnum>8</manvolnum> + </refmeta> + + <refnamediv> + <refname>nss-systemd</refname> + <refname>libnss_systemd.so.2</refname> + <refpurpose>Provide UNIX user and group name resolution for dynamic users and groups.</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <para><filename>libnss_systemd.so.2</filename></para> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><command>nss-systemd</command> is a plug-in module for the GNU Name Service Switch (NSS) functionality of the + GNU C Library (<command>glibc</command>), providing UNIX user and group name resolution for dynamic users and + groups allocated through the <varname>DynamicUser=</varname> option in systemd unit files. See + <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry> for details on + this option.</para> + + <para>This module also ensures that the root and nobody users and groups (i.e. the users/groups with the UIDs/GIDs + 0 and 65534) remain resolvable at all times, even if they aren't listed in <filename>/etc/passwd</filename> or + <filename>/etc/group</filename>, or if these files are missing.</para> + + <para>To activate the NSS module, add <literal>systemd</literal> to the lines starting with + <literal>passwd:</literal> and <literal>group:</literal> in <filename>/etc/nsswitch.conf</filename>.</para> + + <para>It is recommended to place <literal>systemd</literal> after the <literal>files</literal> or + <literal>compat</literal> entry of the <filename>/etc/nsswitch.conf</filename> lines so that + <filename>/etc/passwd</filename> and <filename>/etc/group</filename> based mappings take precedence.</para> + </refsect1> + + <refsect1> + <title>Example</title> + + <para>Here is an example <filename>/etc/nsswitch.conf</filename> file that enables + <command>nss-systemd</command> correctly:</para> + + <programlisting>passwd: compat mymachines <command>systemd</command> +group: compat mymachines <command>systemd</command> +shadow: compat + +hosts: files mymachines resolve [!UNAVAIL=return] dns myhostname +networks: files + +protocols: db files +services: db files +ethers: db files +rpc: db files + +netgroup: nis</programlisting> + + </refsect1> + + <refsect1> + <title>See Also</title> + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>, + <citerefentry><refentrytitle>nss-resolve</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>nss-myhostname</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry><refentrytitle>nss-mymachines</refentrytitle><manvolnum>8</manvolnum></citerefentry>, + <citerefentry project='man-pages'><refentrytitle>nsswitch.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>, + <citerefentry project='man-pages'><refentrytitle>getent</refentrytitle><manvolnum>1</manvolnum></citerefentry> + </para> + </refsect1> + +</refentry> |