rc: fix memory leak of list request context

rc_list() allocates a struct rc_list_context with calloc() and defers
the request; rc_list_readdir() walks /etc/init.d asynchronously and,
once the directory is exhausted (or the requested entry was found),
sends the reply and completes the deferred request -- but never frees
the context.  free(c) only existed in the early opendir() failure path,
so every successful "rc list" ubus call leaked the context (which embeds
a PATH_MAX sized path buffer), slowly exhausting memory.

Free the context in the terminal path after completing the request.

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, 0 deletions

diff --git a/rc.c b/rc.c
index 3d192f1..ae54a10 100644
--- a/rc.c
+++ b/rc.c
@@ -193,6 +193,7 @@ static void rc_list_readdir(struct rc_list_context *c)
 		closedir(c->dir);
 		ubus_send_reply(c->ctx, &c->req, c->buf->head);
 		ubus_complete_deferred_request(c->ctx, &c->req, UBUS_STATUS_OK);
+		free(c);
 		return;
 	}