ucode: fix off-by-one truncation of generated ubus object type name

rpc_ucode_script_register() builds the ubus object type name
"rpcd-plugin-ucode-<object>" into a buffer allocated with "typelen + 1"
bytes, where typelen already accounts for the full string length.  The
snprintf() call however passed "typelen" as the size limit, so snprintf
wrote at most typelen-1 characters plus the NUL terminator and silently
dropped the last character of every object name from the type string.

Pass the actual buffer size (typelen + 1) so the complete name is
emitted.

Assisted-by: Claude:claude-opus-4-8
Link: https://github.com/openwrt/rpcd/pull/34
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/ucode.c b/ucode.c
index c6c053b..26be783 100644
--- a/ucode.c
+++ b/ucode.c
@@ -754,7 +754,7 @@ rpc_ucode_script_register(struct ubus_context *ctx, rpc_ucode_script_t *script)
 		uuobj->script = script;
 		uuobj->signature = ubus_object_methods;
 
-		snprintf(tnptr, typelen, "rpcd-plugin-ucode-%s", ubus_object_name);
+		snprintf(tnptr, typelen + 1, "rpcd-plugin-ucode-%s", ubus_object_name);
 
 		method = (struct ubus_method *)mptr;