hwdb: implement --root option for systemd-hwdb query

Currently, the systemd-hwdb --root flag only has an effect for the
'update' verb. It would be useful to be able to use the --root option
for the 'query' verb too (e.g. for testing a hwdb.bin created with
systemd-hwdb update --root <path>).

Use sd_hwdb_new_from_path to initialize the hwdb if --root is passed to
systemd-hwdb query.

Note that this functionality was not added to 'udevadm hwdb' since that
command is deprecated.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/udev/udevadm-hwdb.c b/src/udev/udevadm-hwdb.c
index 162b3516b8..972cda129d 100644
--- a/src/udev/udevadm-hwdb.c
+++ b/src/udev/udevadm-hwdb.c
@@ -95,7 +95,7 @@ int hwdb_main(int argc, char *argv[], void *userdata) {
         }
 
         if (arg_test)
-                return hwdb_query(arg_test);
+                return hwdb_query(arg_test, NULL);
 
         return 0;
 }