man: mention that conditions in [Match] section support negation

diff --git a/man/systemd.link.xml b/man/systemd.link.xml
index 1cbb061..7594c49 100644 (file)
--- a/man/systemd.link.xml
+++ b/man/systemd.link.xml
@@ -113,52 +113,55 @@
       <varlistentry>
         <term><varname>Host=</varname></term>
         <listitem>
-          <para>Matches against the hostname or machine
-          ID of the host. See <varname>ConditionHost=</varname> in
+          <para>Matches against the hostname or machine ID of the host. See <varname>ConditionHost=</varname> in
           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-          for details.</para>
+          for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+          If an empty string is assigned, then previously assigned value is cleared.
+          </para>
         </listitem>
       </varlistentry>
       <varlistentry>
         <term><varname>Virtualization=</varname></term>
         <listitem>
-          <para>Checks whether the system is executed in
-          a virtualized environment and optionally test
-          whether it is a specific implementation. See
-          <varname>ConditionVirtualization=</varname> in
+          <para>Checks whether the system is executed in a virtualized environment and optionally test
+          whether it is a specific implementation. See <varname>ConditionVirtualization=</varname> in
           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-          for details.</para>
+          for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+          If an empty string is assigned, then previously assigned value is cleared.
+          </para>
         </listitem>
       </varlistentry>
       <varlistentry>
         <term><varname>KernelCommandLine=</varname></term>
         <listitem>
-          <para>Checks whether a specific kernel command line option
-          is set (or if prefixed with the exclamation mark unset). See
+          <para>Checks whether a specific kernel command line option is set. See
           <varname>ConditionKernelCommandLine=</varname> in
           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-          for details.</para>
-        </listitem>
-      </varlistentry>
-        <varlistentry>
-          <term><varname>KernelVersion=</varname></term>
-          <listitem>
-            <para>Checks whether the kernel version (as reported by <command>uname -r</command>) matches a certain
-            expression (or if prefixed with the exclamation mark does not match it). See
-            <varname>ConditionKernelVersion=</varname> in
-            <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
-            details.
-            </para>
-          </listitem>
-        </varlistentry>
+          for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+          If an empty string is assigned, then previously assigned value is cleared.
+          </para>
+        </listitem>
+      </varlistentry>
+      <varlistentry>
+        <term><varname>KernelVersion=</varname></term>
+        <listitem>
+          <para>Checks whether the kernel version (as reported by <command>uname -r</command>) matches a certain
+          expression. See <varname>ConditionKernelVersion=</varname> in
+          <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
+          details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+          If an empty string is assigned, then previously assigned value is cleared.
+          </para>
+        </listitem>
+      </varlistentry>
       <varlistentry>
         <term><varname>Architecture=</varname></term>
         <listitem>
-          <para>Checks whether the system is running on a specific
-          architecture. See <varname>ConditionArchitecture=</varname>
-          in
+          <para>Checks whether the system is running on a specific architecture. See
+          <varname>ConditionArchitecture=</varname> in
           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-          for details.</para>
+          for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+          If an empty string is assigned, then previously assigned value is cleared.
+          </para>
         </listitem>
       </varlistentry>
     </variablelist>

diff --git a/man/systemd.netdev.xml b/man/systemd.netdev.xml
index 72fa7d4..c361f07 100644 (file)
--- a/man/systemd.netdev.xml
+++ b/man/systemd.netdev.xml
@@ -190,53 +190,55 @@
       <varlistentry>
         <term><varname>Host=</varname></term>
         <listitem>
-          <para>Matches against the hostname or machine ID of the
-          host. See <literal>ConditionHost=</literal> in
+          <para>Matches against the hostname or machine ID of the host. See
+          <literal>ConditionHost=</literal> in
           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-          for details.
+          for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+          If an empty string is assigned, then previously assigned value is cleared.
           </para>
         </listitem>
       </varlistentry>
       <varlistentry>
         <term><varname>Virtualization=</varname></term>
         <listitem>
-          <para>Checks whether the system is executed in a virtualized
-          environment and optionally test whether it is a specific
-          implementation. See
-          <literal>ConditionVirtualization=</literal> in
+          <para>Checks whether the system is executed in a virtualized environment and optionally test
+          whether it is a specific implementation. See <literal>ConditionVirtualization=</literal> in
           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-          for details.
+          for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+          If an empty string is assigned, then previously assigned value is cleared.
           </para>
         </listitem>
       </varlistentry>
       <varlistentry>
         <term><varname>KernelCommandLine=</varname></term>
         <listitem>
-          <para>Checks whether a specific kernel command line option
-          is set (or if prefixed with the exclamation mark unset). See
+          <para>Checks whether a specific kernel command line option is set. See
           <literal>ConditionKernelCommandLine=</literal> in
           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-          for details.
+          for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+          If an empty string is assigned, then previously assigned value is cleared.
           </para>
         </listitem>
       </varlistentry>
       <varlistentry>
         <term><varname>KernelVersion=</varname></term>
         <listitem>
-          <para>Checks whether the kernel version (as reported by <command>uname -r</command>) matches a certain
-          expression (or if prefixed with the exclamation mark does not match it). See
-          <literal>ConditionKernelVersion=</literal> in
-          <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> for details.
+          <para>Checks whether the kernel version (as reported by <command>uname -r</command>) matches a
+          certain expression. See <literal>ConditionKernelVersion=</literal> in
+          <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+          for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+          If an empty string is assigned, then previously assigned value is cleared.
           </para>
         </listitem>
       </varlistentry>
       <varlistentry>
         <term><varname>Architecture=</varname></term>
         <listitem>
-          <para>Checks whether the system is running on a specific
-          architecture. See <literal>ConditionArchitecture=</literal> in
+          <para>Checks whether the system is running on a specific architecture. See
+          <literal>ConditionArchitecture=</literal> in
           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-          for details.
+          for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+          If an empty string is assigned, then previously assigned value is cleared.
           </para>
         </listitem>
       </varlistentry>

diff --git a/man/systemd.network.xml b/man/systemd.network.xml
index 268ae22..4127084 100644 (file)
--- a/man/systemd.network.xml
+++ b/man/systemd.network.xml
@@ -137,53 +137,55 @@
         <varlistentry>
           <term><varname>Host=</varname></term>
           <listitem>
-            <para>Matches against the hostname or machine ID of the
-            host. See <literal>ConditionHost=</literal> in
+            <para>Matches against the hostname or machine ID of the host. See
+            <literal>ConditionHost=</literal> in
             <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-            for details.
+            for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+            If an empty string is assigned, then previously assigned value is cleared.
             </para>
           </listitem>
         </varlistentry>
         <varlistentry>
           <term><varname>Virtualization=</varname></term>
           <listitem>
-            <para>Checks whether the system is executed in a virtualized
-            environment and optionally test whether it is a specific
-            implementation. See <literal>ConditionVirtualization=</literal> in
+            <para>Checks whether the system is executed in a virtualized environment and optionally test
+            whether it is a specific implementation. See <literal>ConditionVirtualization=</literal> in
             <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-            for details.
+            for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+            If an empty string is assigned, then previously assigned value is cleared.
             </para>
           </listitem>
         </varlistentry>
         <varlistentry>
           <term><varname>KernelCommandLine=</varname></term>
           <listitem>
-            <para>Checks whether a specific kernel command line option is
-            set (or if prefixed with the exclamation mark unset). See
+            <para>Checks whether a specific kernel command line option is set. See
             <literal>ConditionKernelCommandLine=</literal> in
             <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-            for details.
+            for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+            If an empty string is assigned, then previously assigned value is cleared.
             </para>
           </listitem>
         </varlistentry>
         <varlistentry>
           <term><varname>KernelVersion=</varname></term>
           <listitem>
-            <para>Checks whether the kernel version (as reported by <command>uname -r</command>) matches a certain
-            expression (or if prefixed with the exclamation mark does not match it). See
-            <literal>ConditionKernelVersion=</literal> in
-            <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry> for
-            details.
+            <para>Checks whether the kernel version (as reported by <command>uname -r</command>) matches a
+            certain expression. See <literal>ConditionKernelVersion=</literal> in
+            <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+            for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+            If an empty string is assigned, then previously assigned value is cleared.
             </para>
           </listitem>
         </varlistentry>
         <varlistentry>
           <term><varname>Architecture=</varname></term>
           <listitem>
-            <para>Checks whether the system is running on a specific
-            architecture. See <literal>ConditionArchitecture=</literal> in
+            <para>Checks whether the system is running on a specific architecture. See
+            <literal>ConditionArchitecture=</literal> in
             <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-            for details.
+            for details. When prefixed with an exclamation mark (<literal>!</literal>), the result is negated.
+            If an empty string is assigned, then previously assigned value is cleared.
             </para>
           </listitem>
         </varlistentry>