unexpectedly disappear if a service
terminates on its own choice, a device
is unplugged or a mount point
- unmounted with involvement of
+ unmounted without involvement of
systemd.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>ConditionPathExists=</varname></term>
+ <term><varname>ConditionDirectoryNotEmpty=</varname></term>
<term><varname>ConditionKernelCommandLine=</varname></term>
+ <term><varname>ConditionNull=</varname></term>
<listitem><para>Before starting a unit
verify that the specified condition is
is prefixed with an exclamation mark
(!), the test is negated, and the unit
only started if the path does not
- exist. Similarly
+ exist. <varname>ConditionDirectoryNotEmpty=</varname>
+ is similar to
+ <varname>ConditionPathExists=</varname>
+ but verifies whether a certain path is
+ exists and is a non-empty
+ directory. Similarly
<varname>ConditionKernelCommandLine=</varname>
may be used to check whether a
specific kernel command line option is
set (or if prefixed with the
exclamation mark unset). The argument
must either be a single word, or an
- assignment (i.e. two words, seperated
+ assignment (i.e. two words, separated
by the equality sign). In the former
- case the kernel command line is search
- for the word appearing as is, or as
- left hand side of an assignment. In
- the latter case the exact assignment
- is looked for with right and left hand
- side matching. If multiple conditions
- are specified the unit will be
- executed iff at least one of them
- applies (i.e. a logical OR is
+ case the kernel command line is
+ searched for the word appearing as is,
+ or as left hand side of an
+ assignment. In the latter case the
+ exact assignment is looked for with
+ right and left hand side
+ matching. Finally,
+ <varname>ConditionNull=</varname> may
+ be used to add a constant condition
+ check value to the unit. It takes a
+ boolean argument. If set to
+ <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>
</varlistentry>
</variablelist>