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-rw-r--r--man/nss-systemd.xml22
1 files changed, 15 insertions, 7 deletions
diff --git a/man/nss-systemd.xml b/man/nss-systemd.xml
index 8fde11867c..e343c406f2 100644
--- a/man/nss-systemd.xml
+++ b/man/nss-systemd.xml
@@ -18,7 +18,7 @@
<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>
+ <refpurpose>Provide UNIX user and group name resolution for user/group lookup via Varlink</refpurpose>
</refnamediv>
<refsynopsisdiv>
@@ -28,16 +28,24 @@
<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><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 services implementing the <ulink url="https://systemd.io/USER_GROUP_API">User/Group Record
+ Lookup API via Varlink</ulink>, such as the system and service manager
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry> (for its
+ <varname>DynamicUser=</varname> feature, see
+ <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
+ details) or
+ <citerefentry><refentrytitle>systemd-homed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</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>This module preferably utilizes
+ <citerefentry><refentrytitle>systemd-userdbd.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ for resolving users and groups, but also works without the service running.</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>
@@ -54,7 +62,7 @@
<!-- synchronize with other nss-* man pages and factory/etc/nsswitch.conf -->
<programlisting>passwd: compat mymachines <command>systemd</command>
-group: compat mymachines <command>systemd</command>
+group: compat [SUCCESS=merge] mymachines [SUCCESS=merge] <command>systemd</command>
shadow: compat
hosts: files mymachines resolve [!UNAVAIL=return] dns myhostname