test

-- Initialize user data
local users = {
    admin = { role = "admin", password = "admin123" },
    root = { role = "root", password = "rootpass" },
    limited = { role = "limited", password = "limitedpass" }
}

-- Current user (initialize as guest)
local currentUser = { role = "guest" }

-- Function to log in
function login(username, password)
    local user = users[username]
    if user and user.password == password then
        currentUser = user
        print("Login successful. Welcome, " .. username .. "!")
    else
        print("Login failed. Incorrect username or password.")
    end
end

-- Example usage
login("limited", "limitedpass")

-- Function to execute commands based on user role
function executeCommand(command)
    if currentUser.role == "admin" then
        -- Execute admin commands
        if command == "shutdown" then
            print("System shutting down...")
        elseif command == "reboot" then
            print("System rebooting...")
        else
            print("Unknown command for admin.")
        end
    elseif currentUser.role == "root" then
        -- Execute root commands
        if command == "access_files" then
            print("Accessing system files...")
        else
            print("Unknown command for root.")
        end
    elseif currentUser.role == "limited" then
        -- Execute limited user commands
        if command == "user_program" then
            print("Running user program...")
        elseif command == "delete_file" then
            print("Limited user cannot delete files.")
        else
            print("Unknown command for limited user.")
        end
    else
        print("Guests have limited access.")
    end
end

-- Example command execution
executeCommand("shutdown")
executeCommand("access_files")
executeCommand("user_program")
executeCommand("delete_file")