bus: properly parse NameOwnerChanged messages when caller explicitly wants to match...

diff --git a/src/libsystemd-bus/bus-control.c b/src/libsystemd-bus/bus-control.c
index db7263f6d50c11b12dfe0b8f46fd68785db7fed5..5125fd9724b0fcb52cf70862eb625d1e0a06e2f7 100644 (file)
--- a/src/libsystemd-bus/bus-control.c
+++ b/src/libsystemd-bus/bus-control.c
@@ -741,7 +741,7 @@ static int add_name_change_match(sd_bus *bus,
                         return 0;
         }
 
                         return 0;
         }
 

-        if (old_owner) {
+        if (!isempty(old_owner)) {

                 r = bus_kernel_parse_unique_name(old_owner, &old_owner_id);
                 if (r < 0)
                         return 0;
                 r = bus_kernel_parse_unique_name(old_owner, &old_owner_id);
                 if (r < 0)
                         return 0;


@@ -751,7 +751,7 @@ static int add_name_change_match(sd_bus *bus,
                         return 0;
         }
 
                         return 0;
         }
 

-        if (new_owner) {
+        if (!isempty(new_owner)) {

                 r = bus_kernel_parse_unique_name(new_owner, &new_owner_id);
                 if (r < 0)
                         return r;
                 r = bus_kernel_parse_unique_name(new_owner, &new_owner_id);
                 if (r < 0)
                         return r;