Scanner Client Program

rednet.open("back")
idsToCheck = {}
-- list of ids to check and update from

tArgs = { ... }
local newFileContents = ""
local overwrite = false

if tArgs[1] then
  if fs.exists(tArgs[1]) then

    print("File exists. Overwrite? (Y/N)")
    answer = read()

    if answer:lower() == "y" then

      overwrite = true
    end
  end

  if not fs.exists(tArgs[1]) or overwrite then
    for i=1,#idsToCheck do

      rednet.send(idsToCheck[i],"sendScan")
      local currID = -1

      while currID ~= idsToCheck[i] do

        currID,msg = rednet.receive(0.1)
        if not currID then break end
      end

      if currID then

        spacing = "\n\n\n"
        if newFileContents == "" then spacing = "" end

        newFileContents = newFileContents .. spacing ..  "Log for ID: " .. currID .. "\n" .. msg
      end
    end

    logFile = fs.open(tArgs[1],"w")
    logFile.write(newFileContents)
    logFile.close()
  end

else
  print("Invalid arguments. Give file output as first argument.")
end