execute2.lua

function shell_escape(x)
    return "'" .. x:gsub("'", "'\\''") .. "'"
end

function execute2(args)
    local t = {'exec', '/bin/sh', '-c'}
    for _, a in ipairs(args) do
        t[#t + 1] = shell_escape(a)
    end
    return os.execute(table.concat(t, ' '))
end