systemd: fix systemctl enable script for template units
The systemctl script supports enabling template units by evaluating
"DefaultInstance" parameter. Unfortunately, due to the sed replacement
mechanism, all escaping used in the DefaultInstance string, e.g. for
giving path names with dashes, is expanded too early.
Thus for
DefaultInstance=-path\x2dwith\x2ddashes
a path unit `foobar@.path` will be installed with a symlink named
foobar@-path-with-dashed.path
that is interpreted as the path `/path/with/dashes` instead of the
intended path nam `/path-with-dashes`.
To fix this behavior additional escaping of the backslashes in the
`DefaultInstance` string is required so that sed does not expand the
escaped characters.
Signed-off-by: Enrico Jorns <ejo@pengutronix.de> Signed-off-by: Ross Burton <ross.burton@intel.com>
