</varlistentry>
<varlistentry>
+ <term><varname>AmbientCapabilities=</varname></term>
+
+ <listitem><para>Controls which capabilities to include in the
+ ambient capability set for the executed process. Takes a
+ whitespace-separated list of capability names as read by
+ <citerefentry project='mankier'><refentrytitle>cap_from_name</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ e.g. <constant>CAP_SYS_ADMIN</constant>,
+ <constant>CAP_DAC_OVERRIDE</constant>,
+ <constant>CAP_SYS_PTRACE</constant>. This option may appear more than
+ once in which case the ambient capability sets are merged.
+ If the list of capabilities is prefixed with <literal>~</literal>, all
+ but the listed capabilities will be included, the effect of the
+ assignment inverted. If the empty string is
+ assigned to this option, the ambient capability set is reset to
+ the empty capability set, and all prior settings have no effect.
+ If set to <literal>~</literal> (without any further argument), the
+ ambient capability set is reset to the full set of available
+ capabilities, also undoing any previous settings. Note that adding
+ capabilities to ambient capability set adds them to the process's
+ inherited capability set.
+ </para><para>
+ Ambient capability sets are useful if you want to execute a process
+ as a non-privileged user but still want to give it some capabilities.
+ Note that in this case option <constant>keep-caps</constant> is
+ automatically added to <varname>SecureBits=</varname> to retain the
+ capabilities over the user change.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
<term><varname>SecureBits=</varname></term>
<listitem><para>Controls the secure bits set for the executed
process. Takes a space-separated combination of options from