env.lua

来自「小型脚本语言开发包,使用于嵌入式开发,比较热门.」· LUA 代码 · 共 8 行

-- read environment variables as if they were global variables

local f=function (t,i) return os.getenv(i) end
setmetatable(getfenv(),{__index=f})

-- an example
print(a,USER,PATH)