From: Karl Palsson <karlp@etactica.com>
Date: Tue, 30 Jun 2020 10:38:42 +0000 (+0000)
Subject: lua/uloop: make get_sock_fd capable of absolute addresses
X-Git-Url: http://git.openwrt.org/?a=commitdiff_plain;h=c0941d3289fc0f1468ad6384f7af141cfd4adead;p=project%2Flibubox.git

lua/uloop: make get_sock_fd capable of absolute addresses

The original code required the use of relative addresses into the lua
stack.  It should accept either.

Signed-off-by: Karl Palsson <karlp@etactica.com>
---

diff --git a/lua/uloop.c b/lua/uloop.c
index fcbe274..394970d 100644
--- a/lua/uloop.c
+++ b/lua/uloop.c
@@ -188,7 +188,8 @@ static int get_sock_fd(lua_State* L, int idx) {
 		lua_getfield(L, idx, "getfd");
 		if(lua_isnil(L, -1))
 			return luaL_error(L, "socket type missing 'getfd' method");
-		lua_pushvalue(L, idx - 1);
+		/* if we have absolute, no need to adjust for getfield() call */
+		lua_pushvalue(L, idx > 0 ? idx: idx - 1);
 		lua_call(L, 1, 1);
 		fd = lua_tointeger(L, -1);
 		lua_pop(L, 1);