syslog: rework syslog detection so that we need no compile-time option what the name...

[elogind.git] / man / systemd.unit.xml

diff --git a/man/systemd.unit.xml b/man/systemd.unit.xml
index 14ec4561b2e925fc9ca74b758c16ef81b540d445..2ae986ad04b0954d757d1f05b5fc3326c60de6b3 100644 (file)
--- a/man/systemd.unit.xml
+++ b/man/systemd.unit.xml
@@ -139,7 +139,10 @@
                 with the <command>enable</command> command of the
                 <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
                 tool which reads information from the [Install]
-                section of unit files. (See below.)</para>
+                section of unit files. (See below.) A similar
+                functionality exists for <varname>Requires=</varname>
+                type dependencies as well, the directory suffix is
+                <filename>.requires/</filename> in this case.</para>
 
                 <para>Note that while systemd offers a flexible
                 dependency system between units it is recommended to
@@ -575,6 +578,7 @@
                                 <term><varname>ConditionPathExists=</varname></term>
                                 <term><varname>ConditionDirectoryNotEmpty=</varname></term>
                                 <term><varname>ConditionKernelCommandLine=</varname></term>
+                                <term><varname>ConditionVirtualization=</varname></term>
                                 <term><varname>ConditionNull=</varname></term>
 
                                 <listitem><para>Before starting a unit
@@ -615,7 +619,24 @@
                                 assignment. In the latter case the
                                 exact assignment is looked for with
                                 right and left hand side
-                                matching. Finally,
+                                matching. <varname>ConditionVirtualization=</varname>
+                                may be used to check whether the
+                                system is executed in a virtualized
+                                environment and optionally test
+                                whether it is a specific
+                                implementation. Takes either boolean
+                                value to check if being executed in
+                                any virtual environment or one of the
+                                <varname>qemu</varname>,
+                                <varname>kvm</varname>,
+                                <varname>vmware</varname>,
+                                <varname>microsoft</varname>,
+                                <varname>oracle</varname>,
+                                <varname>xen</varname>,
+                                <varname>openvz</varname> to test
+                                against a specific implementation. The
+                                test may be negated by prepending an
+                                exclamation mark. Finally,
                                 <varname>ConditionNull=</varname> may
                                 be used to add a constant condition
                                 check value to the unit. It takes a
@@ -623,10 +644,21 @@
                                 <varname>false</varname> the condition
                                 will always fail, otherwise
                                 succeed. If multiple conditions are
-                                specified the unit will be executed
-                                if at least one of them applies
-                                (i.e. a logical OR is
-                                applied).</para></listitem>
+                                specified the unit will be executed if
+                                all of them apply (i.e. a logical AND
+                                is applied). Condition checks can be
+                                prefixed with a pipe symbol (|) in
+                                which case a condition becomes a
+                                triggering condition. If at least one
+                                triggering condition is defined for a
+                                unit then the unit will be executed if
+                                at least one of the triggering
+                                conditions apply and all of the
+                                non-triggering conditions. If you
+                                prefix an argument with the pipe
+                                symbol and an exclamation mark the
+                                pipe symbol must be passed first, the
+                                exclamation second.</para></listitem>
                         </varlistentry>
                 </variablelist>