Simulate

local args = {...}
local ID,root

if args[1] then
  ID = tonumber(args[1])
  root = ("/"..ID)
else
  return -- exits program :P
end

oldID = os.getComputerID()
oldPath = shell.path()
OldGID = os.getComputerID
if type(ID) ~= "number" then
  print("Please use proper arguments, EX: Simulate <ID>")
  return
end

function os.getComputerID()
  return ID
end

if not fs.exists("/"..ID) then
  fs.makeDir("/"..ID)
end

shell.setPath("/EmuRom/programs")
shell.setDir(root)
local oldSet = shell.setDir
local resolve = shell.resolve
local oldRun = shell.run

function exit()
  shell.setDir = oldSet
  shell.run = oldRun
end

function shell.setDir(toDir)
  --shell.setDir = oldSet
  local absolute = resolve(toDir)
  local lastc = fs.getName(absolute)
  if absolute == "/" or absolute:match("(.+/)") ~= ID then
    printError("Attempt to leave sandbox")
    return
  end
  --[[if lastc=="root" or lastc=="EmuRom" then
    printError("Attempt to leave sandbox")
    return
  end]]--
  return oldSet(toDir)
end

function shell.run(prog,...)
  if shell.resolveProgram(prog) == shell.resolveProgram("shell") or shell.resolveProgram(prog) == shell.resolveProgram("/rom/programs/shell") then
  printError("Attempt to leave sandbox")
  return
  end
  return oldRun(prog,...)
end