[OE-core] [PATCH] systemd: fix systemctl enable script for template units

[Enrico Jorns]

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 at .path` will be installed with a symlink named

  foobar at -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 at pengutronix.de>
---
 meta/recipes-core/systemd/systemd-systemctl/systemctl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/recipes-core/systemd/systemd-systemctl/systemctl b/meta/recipes-core/systemd/systemd-systemctl/systemctl
index 6e163bd..697fbd5 100755
--- a/meta/recipes-core/systemd/systemd-systemctl/systemctl
+++ b/meta/recipes-core/systemd/systemd-systemctl/systemctl
@@ -136,7 +136,7 @@ for service in $services; do
 					continue
 				else
 					echo "Found DefaultInstance $default_instance, enabling it"
-					enable_service=$(echo $service | sed "s/@/@$default_instance/")
+					enable_service=$(echo $service | sed "s/@/@$(echo $default_instance | sed 's/\\/\\\\/g')/")
 				fi
 			fi
 			mkdir -p $ROOT/etc/systemd/system/$r.wants
-- 
2.6.4