apt-get

local param = {...}
local modem = peripheral.wrap("back")
modem.open(40)
function get(filename)
  print("requesting "..filename)
  modem.transmit(41,40,"get "..filename)
  local code = getMsg()
  if code ~= "200" then
    print("Error "..code)
    return
  else
    print("OK "..code .. "  downloading ...")
    data = getMsg()
    if not fs.exists("apt-files") then fs.makeDir("apt-files") end
    file = fs.open("apt-files/"..filename,"w")
    file.write(data)
    file.close()
    print(" done")
  end
end
function update()
  print("update started")
  local list = fs.list("apt-files")
  for i=1,#list do
    if not fs.isDir(list[i]) then
      get(fs.getName(list[i]))
    end
  end
  print("update finished")
end
function getMsg()
  local e,s,ch1,ch2,msg,d =os.pullEvent("modem_message")
  return msg
end
function printUsage()
  print("Usage: apt-get install <filename>")
  print("       apt-get update")
end
if #param < 1 then
  printUsage()
else
  if param[1]=="install" then get(param[1]) end
  if param[1]=="update" then update() end
end