SBUS: Return empty string if a string getter returns NULL

In line with getters never returning errors, a getter should return an
empty string instead of NULL in case a string-like property in SSSD is
not set.

Reviewed-by: Stef Walter <stefw@redhat.com>
Reviewed-by: Pavel Březina <pbrezina@redhat.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/src/tests/sbus_codegen_tests_generated.c b/src/tests/sbus_codegen_tests_generated.c
index 4ace03650..211ad8967 100644
--- a/src/tests/sbus_codegen_tests_generated.c
+++ b/src/tests/sbus_codegen_tests_generated.c
@@ -363,6 +363,15 @@ const struct sbus_property_meta test_pilot__properties[] = {
         NULL, /* no invoker */
     },
     {
+        "null_string", /* name */
+        "s", /* type */
+        SBUS_PROPERTY_READABLE,
+        offsetof(struct test_pilot, test_pilot_get_null_string),
+        invoke_get_s,
+        0, /* not writable */
+        NULL, /* no invoker */
+    },
+    {
         "byte_array", /* name */
         "ay", /* type */
         SBUS_PROPERTY_READABLE,
@@ -764,7 +773,7 @@ static int invoke_get_s(struct sbus_request *dbus_req, void *function_ptr)
 
     (handler)(dbus_req, dbus_req->intf->instance_data, &prop_val);
 
-    out_val = prop_val;
+    out_val = prop_val == NULL ? "" : prop_val;
     return sbus_request_return_as_variant(dbus_req, DBUS_TYPE_STRING, &out_val);
 }