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Lua Academy · Lesson

Sandboxing Plugin Execution

Run plugins in restricted environments using setfenv/load with custom _ENV.

Why Sandbox Plugins?

Untrusted plugin code can call dangerous functions (os.execute, io.open, load) or access private application state. A sandbox restricts what code can do.

Custom _ENV in Lua 5.2+

In Lua 5.2+, each chunk's global environment is _ENV. Load a chunk with a restricted _ENV to limit its access.

local function sandbox(code, env)
  local chunk, err = load(code, "sandbox", "t", env)
  if not chunk then return nil, err end
  return pcall(chunk)
end

All lessons in this course

  1. Plugin Discovery and Loading
  2. Plugin API and Hook System
  3. Sandboxing Plugin Execution
  4. Versioning and Dependency Management
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