sd-bus: add sd_bus_message_is_empty() for checking whether a message carries any body

1 files changed, 6 insertions, 0 deletions

diff --git a/src/libsystemd/sd-bus/bus-message.c b/src/libsystemd/sd-bus/bus-message.c
index 1a8c445f0b..9d6647b2c4 100644
--- a/src/libsystemd/sd-bus/bus-message.c
+++ b/src/libsystemd/sd-bus/bus-message.c
@@ -5380,6 +5380,12 @@ _public_ const char* sd_bus_message_get_signature(sd_bus_message *m, int complet
         return strempty(c->signature);
 }
 
+_public_ int sd_bus_message_is_empty(sd_bus_message *m) {
+        assert_return(m, -EINVAL);
+
+        return isempty(m->root_container.signature);
+}
+
 _public_ int sd_bus_message_copy(sd_bus_message *m, sd_bus_message *source, int all) {
         bool done_something = false;
         int r;