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

diff --git a/src/libsystemd/libsystemd.sym.m4 b/src/libsystemd/libsystemd.sym.m4
index 0c02db75306054c0d39133146289adeebedf5677..76329425642ea9e2d3838699fd9a9ed51ea4577d 100644 (file)
--- a/src/libsystemd/libsystemd.sym.m4
+++ b/src/libsystemd/libsystemd.sym.m4
@@ -254,6 +254,7 @@ global:
         sd_bus_message_get_realtime_usec;
         sd_bus_message_get_seqnum;
         sd_bus_message_get_creds;
         sd_bus_message_get_realtime_usec;
         sd_bus_message_get_seqnum;
         sd_bus_message_get_creds;

+        sd_bus_message_is_empty;

         sd_bus_message_is_signal;
         sd_bus_message_is_method_call;
         sd_bus_message_is_method_error;
         sd_bus_message_is_signal;
         sd_bus_message_is_method_call;
         sd_bus_message_is_method_error;

diff --git a/src/libsystemd/sd-bus/bus-message.c b/src/libsystemd/sd-bus/bus-message.c
index 1a8c445f0bc519940d1c4155330ed9d7b10a0004..9d6647b2c4cf58f777d820db465df92ad4716f4f 100644 (file)
--- 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);
 }
 
         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;
 _public_ int sd_bus_message_copy(sd_bus_message *m, sd_bus_message *source, int all) {
         bool done_something = false;
         int r;

diff --git a/src/systemd/sd-bus.h b/src/systemd/sd-bus.h
index 49d4907d1c34e53582a99f3c74a42edcb695ce7f..58a898080b7c200156aa7c3a69533d0cf6dd9b66 100644 (file)
--- a/src/systemd/sd-bus.h
+++ b/src/systemd/sd-bus.h
@@ -222,6 +222,7 @@ sd_bus_creds *sd_bus_message_get_creds(sd_bus_message *m); /* do not unref the r
 int sd_bus_message_is_signal(sd_bus_message *m, const char *interface, const char *member);
 int sd_bus_message_is_method_call(sd_bus_message *m, const char *interface, const char *member);
 int sd_bus_message_is_method_error(sd_bus_message *m, const char *name);
 int sd_bus_message_is_signal(sd_bus_message *m, const char *interface, const char *member);
 int sd_bus_message_is_method_call(sd_bus_message *m, const char *interface, const char *member);
 int sd_bus_message_is_method_error(sd_bus_message *m, const char *name);

+int sd_bus_message_is_empty(sd_bus_message *m);

 
 int sd_bus_message_set_expect_reply(sd_bus_message *m, int b);
 int sd_bus_message_set_auto_start(sd_bus_message *m, int b);
 
 int sd_bus_message_set_expect_reply(sd_bus_message *m, int b);
 int sd_bus_message_set_auto_start(sd_bus_message *m, int b);