CompBox

function cPrint(y, text)
  size = term.getSize()
  term.setCursorPos(size/2-math.floor(#text/2), y)
  write(text)
end

local oldOpen = fs.open
local oldDelete = fs.delete
local oldMove = fs.move
local oldCopy = fs.copy
local oldEject = disk.eject

fs.open = function(fileName, mode)
  fileName = shell.resolve(fileName)
  if fileName:sub(1, 4) == "rom/" or fileName:sub(1, 6) == "disk2/" then
    return oldOpen(fileName, mode)
  else
    return false
  end
end

fs.delete = function(fileName)
  if fileName:sub(1, 6) == "disk2/" then
    return oldDelete(fileName)
  else
    return false
  end
end

fs.move = function(fileName, destination)
  fileName = shell.resolve(fileName)
  if fileName:sub(1, 6) == "disk2/" or fileName:sub(1, 4) == "rom/" and destination:sub(1, 6) == "disk2/" then
    return oldMove(fileName, destination)
  else
    return false
  end
end

fs.copy = function(fileName, destination)
  fileName = shell.resolve(fileName)
  if fileName:sub(1, 6) == "disk2/" or fileName:sub(1, 4) == "rom/" and destination:sub(1, 6) == "disk2/" then
    return oldCopy(fileName, destination)
  else
    return false
  end
end

disk.eject = function(side)
  return false
end

_G.fs.open = fs.open
_G.fs.delete = fs.delete
_G.fs.move = fs.move
_G.fs.copy = fs.copy
_G.disk.eject = disk.eject

term.clear()
cPrint(5, "Public Computer Box")
cPrint(6, "Step in and press any key")
local evt = os.pullEvent("key")

local time = os.time()
if http then
  local timeSite = http.get("http://www.timeapi.org/utc/now?format=%25a%20%25b%20%25d%20%25Y%20%25I:%25M:%25S")
  time = timeSite.readAll()
end
local logTable = {"Computer Box login", time}
local logString = textutils.serialize(logTable)

rednet.open("back")
rednet.send(118, logString)
rednet.close("back")

term.clear()
term.setCursorPos(1,1)
print("BoxOS 1.4")