thread unknown ENV{key} match as empty value

This way we can run a rule if a certain key is not set by:
  ENV{key}="" or ENV{key}!="?*"

Signed-off-by: Kay Sievers <kay.sievers@suse.de>

diff --git a/udev_rules.c b/udev_rules.c
index 5669a8593ede14c05c1449ebcbe66086cc01bc91..4bf05cd43781d0c763372de8b0241627cbdfbf4c 100644 (file)
--- a/udev_rules.c
+++ b/udev_rules.c
@@ -748,8 +748,8 @@ static int match_rule(struct udevice *udev, struct udev_rule *rule,
                        const char *value = getenv(key_name);
 
                        if (!value) {
-                               dbg("ENV{'%s'} is not found", key_name);
-                               goto exit;
+                               dbg("ENV{'%s'} is not set", key_name);
+                               value = "";
                        }
                        if (match_key("ENV", rule, &pair->key, value))
                                goto exit;