man: add documentation for the binfmt, modules-load, sysctl services

1 files changed, 33 insertions, 20 deletions

diff --git a/man/binfmt.d.xml b/man/binfmt.d.xml
index 1cc75da9ac..1f5a51db4a 100644
--- a/man/binfmt.d.xml
+++ b/man/binfmt.d.xml
@@ -42,7 +42,8 @@
 
         <refnamediv>
                 <refname>binfmt.d</refname>
-                <refpurpose>Configure additional binary formats at boot</refpurpose>
+                <refpurpose>Configure additional binary formats for
+                executables at boot</refpurpose>
         </refnamediv>
 
         <refsynopsisdiv>
@@ -54,10 +55,11 @@
         <refsect1>
                 <title>Description</title>
 
-		<para><command>systemd</command> uses
-		files from the above directories to configure
-		additional binary formats to register during boot in
-		the kernel.</para>
+		<para>At boot,
+		<citerefentry><refentrytitle>systemd-binfmt.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+		reads configuration files from the above directories
+		to register in the kernel additional binary
+		formats for executables.</para>
         </refsect1>
 
         <refsect1>
@@ -73,21 +75,30 @@
                 ignored. Note that this means you may not use ; and #
                 as delimiter in binary format rules.</para>
 
-                <para>Each configuration file is named in the style of
-                <filename>&lt;program&gt;.conf</filename>.
-                Files in <filename>/etc/</filename> override
-                files with the same name in <filename>/usr/lib/</filename>.
-                Files in <filename>/run</filename> override files with
-                the same name in <filename>/etc/</filename> and
-                <filename>/usr/lib/</filename>. Packages should install their
-                configuration files in <filename>/usr/lib/</filename>, files
-                in <filename>/etc/</filename> are reserved for the local
-                administration, which possibly decides to override the
-                configurations installed from packages. All files are sorted
-                by filename in alphabetical order, regardless in which of the
-                directories they reside, to ensure that a specific
-                configuration file takes precedence over another file with
-                an alphabetically later name.</para>
+                <para>Each configuration file shall be named in the
+                style of <filename>&lt;program&gt;.conf</filename>.
+                Files in <filename>/etc/</filename> override files
+                with the same name in <filename>/usr/lib/</filename>
+                and <filename>/run/</filename>. Files in
+                <filename>/run/</filename> override files with the
+                same name in <filename>/usr/lib/</filename>. Packages
+                should install their configuration files in
+                <filename>/usr/lib/</filename>, files in
+                <filename>/etc/</filename> are reserved for the local
+                administrator, who may use this logic to override the
+                configuration files installed from vendor
+                packages. All files are sorted by their filename in
+                alphabetical order, regardless in which of the
+                directories they reside, to guarantee that a specific
+                configuration file takes precedence over another file
+                with an alphabetically later name.</para>
+
+                <para>If the administrator wants to disable a
+                configuration file supplied by the vendor the
+                recommended way is to place a symlink to
+                <filename>/dev/null</filename> in
+                <filename>/etc/binfmt.d/</filename> bearing the
+                same file name.</para>
         </refsect1>
 
         <refsect1>
@@ -104,6 +115,8 @@
                 <title>See Also</title>
                 <para>
                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>systemd-binfmt.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>systemd-delta</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                         <citerefentry><refentrytitle>wine</refentrytitle><manvolnum>8</manvolnum></citerefentry>
                 </para>
         </refsect1>