update 2026-08-20 00:24:27

luci-app-ssr-plus/root/usr/share/shadowsocksr/gen_config.lua

@@ -4,12 +4,23 @@ require "luci.sys"
 local ucursor = require "luci.model.uci".cursor()
 local json = require "luci.jsonc"
 
-local server_section = arg[1]
-local proto          = arg[2] or "tcp"
-local local_port     = arg[3] or "0"
-local socks_port     = arg[4] or "0"
+-- An omitted value reaches us either as a missing argument or as an empty
+-- string, depending on whether the caller quoted the expansion. Empty strings
+-- are truthy in Lua, so "arg[n] or default" alone does not cover both.
+local function argv(n, default)
+	local value = arg[n]
+	if value == nil or value == "" then
+		return default
+	end
+	return value
+end
 
-local chain          = arg[5] or "0"
+local server_section = arg[1]
+local proto          = argv(2, "tcp")
+local local_port     = argv(3, "0")
+local socks_port     = argv(4, "0")
+
+local chain          = argv(5, "0")
 
 -- trim
 local function trim(text)