CC-OS Installer

-- CC-OS installer to accompany CC-BIOS --

shell = {}
function shell.resolve(path) -- Make GitGet work!
  return path
end

local function find(sStr, tChars)
    for i=1, #tChars, 1 do
        if sStr:find(tChars[i], 1, true) then
            return true
        end
    end
    return false
end

local function num(str)
  local rtn = {}
  for i=1, #str, 1 do
    table.insert(rtn, keys[str:sub(i,i)])
    print(str:sub(i,i), keys[str:sub(i,i)])
  end

  return rtn
end

local function encode(str)
  local rtn = ""
  local tNum = num(str)
  for i=1, #tNum, 1 do
    rtn = rtn .. tostring(bit32.arshift(tNum[i], i))
    if i < #tNum then
      rtn = rtn .. ":"
    end
  end

  return rtn
end

local function generateFile(uname, pwd)
  return "return {\n  {\n    username = " .. uname .. ",\n    uid = 1,\n    password = " .. pwd .. "\n  }\n}"
end

local data = http.get("https://pastebin.com/raw/W5ZkVYSi")
local exec = loadstring(data.readAll())
data.close()
exec("ocawesome101", "cc-os")

term.clear()
term.setCursorPos(1,1)
print("CC-OS has been installed. There is now some basic setup to do.")

local specialChars = {" ", "/", "?", ".", ",", "<", ">", "\"", "'", "|", "[", "]", "{", "}", "-", "_", "+", "=", "(", ")", "`", "~", "!", "@", "#", "$", "\%", "^", "&", "*"} -- Sorry
local uname, passwd = "", ""

while true do
    write("Enter a username: ")
    uname = read()

    if find(uname, specialChars) then
        printError("Usernames cannot contain special characters.")
    else
        break
    end
end

while true do
    write("Enter a password: ")

    passwd = read("*")

    if #passwd < 4 then
        break
    else
        print("Password must be four or more characters.")
    end
end

passwd = encode(passwd)

local toWrite = generateFile(uname, passwd)

print("The following operations will be performed:")
print("Create /home/" .. uname)
print("Store " .. toWrite .. " in /etc/passwd")

write("Apply changes? [y/n]: ")

local c = read()

if c:lower() == "n" then
    print("I hope you know the root password!")
    sleep(1)
    os.reboot()
end

fs.makeDir("/etc")
fs.makeDir("/home/" .. uname)

local handle = fs.open("/etc/passwd")
handle.write(toWrite)
handle.close()

print("Done")

sleep(2)
os.reboot()