- value of the environment variable split at whitespace,
- resulting in zero or more arguments. To pass a literal
- dollar sign, use <literal>$$</literal>. Variables
- whose value is not known at expansion time are treated
- as empty strings. Note that the first argument
- (i.e. the program to execute) may not be a
- variable.</para>
+ value of the environment variable split at whitespace
+ resulting in zero or more arguments. For this type of
+ expansion, quotes and respected when splitting into
+ words, and afterwards removed.</para>
+
+ <para>Example:</para>
+
+ <programlisting>Environment="ONE=one" 'TWO=two two'
+ExecStart=/bin/echo $ONE $TWO ${TWO}</programlisting>
+
+ <para>This will execute <command>/bin/echo</command>
+ with four arguments: <literal>one</literal>,
+ <literal>two</literal>, <literal>two</literal>, and
+ <literal>two two</literal>.</para>
+
+ <para>Example:</para>
+ <programlisting>Environment=ONE='one' "TWO='two two' too" THREE=
+ExecStart=/bin/echo ${ONE} ${TWO} ${THREE}
+ExecStart=/bin/echo $ONE $TWO $THREE</programlisting>
+ <para>This results in <filename>echo</filename> being
+ called twice, the first time with arguments
+ <literal>'one'</literal>,
+ <literal>'two two' too</literal>, <literal></literal>,
+ and the second time with arguments
+ <literal>one</literal>, <literal>two two</literal>,
+ <literal>too</literal>.
+ </para>
+
+ <para>To pass a literal dollar sign, use
+ <literal>$$</literal>. Variables whose value is not
+ known at expansion time are treated as empty
+ strings. Note that the first argument (i.e. the
+ program to execute) may not be a variable.</para>
~ianmdlvl / elogind.git / blobdiff