clarify $ escaping in Exec* lines

Explain that literal $ can be passed by doubling it.

diff --git a/man/systemd.service.xml b/man/systemd.service.xml
index 8eda85f62db6546684545c5a2082b5cdccd5781d..c06e14efc23e1c64b30515cc78de8a612c44b83d 100644 (file)
--- a/man/systemd.service.xml
+++ b/man/systemd.service.xml
@@ -369,7 +369,8 @@
                                 case it will be replaced by the value
                                 of the environment variable split up
                                 at whitespace, resulting in zero or
                                 case it will be replaced by the value
                                 of the environment variable split up
                                 at whitespace, resulting in zero or

-                                more arguments. Note that the first
+                                more arguments. To pass literal dollar sign
+                                use <literal>$$</literal>. Note that the first

                                 argument (i.e. the program to execute)
                                 may not be a variable, since it must
                                 be a literal and absolute path
                                 argument (i.e. the program to execute)
                                 may not be a variable, since it must
                                 be a literal and absolute path