reverse file written in lua

reverse-file.lua

#!/usr/bin/env lua
--[[
for line in io.lines(arg[0]) do
    print(string.reverse(line))
end
--]]

local file = io.open(arg[0], "r")
file:seek("end", -1)
while true do
    io.write(file:read(1))
    if file:seek("cur", -2) == nil then
         break
    end
end
file:close()