loginctl: add basic implementation of loginctl for introspecting controlling sessions/users/seats

1 files changed, 16 insertions, 0 deletions

diff --git a/src/dbus-common.c b/src/dbus-common.c
index 5bfaf361fb..4b9b457fc3 100644
--- a/src/dbus-common.c
+++ b/src/dbus-common.c
@@ -821,3 +821,19 @@ int bus_append_strv_iter(DBusMessageIter *iter, char **l) {
 
         return 0;
 }
+
+int bus_iter_get_basic_and_next(DBusMessageIter *iter, int type, void *data, bool next) {
+
+        assert(iter);
+        assert(data);
+
+        if (dbus_message_iter_get_arg_type(iter) != type)
+                return -EIO;
+
+        dbus_message_iter_get_basic(iter, data);
+
+        if (!dbus_message_iter_next(iter) != !next)
+                return -EIO;
+
+        return 0;
+}