Transferring variables through scripts?

Right now I am working on a disk drive that contains a lock script on it, and transfers it to another computer with an installer program. The installer program acts as a setup and it asks you questions like "What do you want your username to be" and "What do you want your password to be". I am stuck because I don't know how I can make it save what you put through one script to another. Any help would be appreciated. Thanks!

Well, first of all, you got to save the password protection to your startup file. you do something like:

password = "hurrdurr"
tProt = {
"some line",
"blah",
"blah",
"the program is here",
"if prot == "..password.." then",
"else",
"end"}
file = fs.open("startup","w") --Opens the file for writing.
file.write(tProt)
file.close()

I think it would work… not sure.
Hope this helped.

Alright, I will try that. Thanks.

You should not save the password in the same file as your actual script. Have a seperate config file, where you put that kind of stuff into and have your script read that file on start.

Ponder, on 17 July 2012 - 11:49 PM said:

You should not save the password in the same file as your actual script. Have a seperate config file, where you put that kind of stuff into and have your script read that file on start.

I tried that, but I can't find any tutorials on how to properly use fs.open. Could I please have an example of how to use this?

local function saveState(saveTable)
	local file = fs.open("status", "w")
	if file then
		for eNum, eInfo in ipairs(saveTable) do
			file.writeLine(eInfo.type..","..eInfo.user..","..eInfo.pass)
		end
		file.close()
	end
end
local function loadState()
	local loadTable = {}
	local file = fs.open("status", "r")
	if file then
		readLine = file.readLine()
		while readLine do
			local lineTable = {}
			lineTable.type, lineTable.user, lineTable.pass = string.match(readLine, "(%w+),(%w+),(%w+)")
			if lineTable.type then
				table.insert(loadTable, lineTable)
			end
			readLine = file.readLine()
		end
		file.close()
	end
	return loadTable

Here is a save/load state function that I like to use. Basically, you add

local controlTable = {}

At the top of your code, and before declaring the new user/admin/whatever, use this:

local deviceTable = {type="NAME OF USER TYPE HERE"}

This is an example of declaring an admin:

while true do
local controlTable = {}
while true do
title()
local deviceTable = {type="Admin"}
while true do
print("Please enter Administrator name:")
deviceTable.name  = read()
  if deviceTable.name == "" then
  print("Admin name cannot be blank")
  sleep(1)
  title()
  else break
  end
end
title()
while true do
  while true do
  print("Please enter Administrator password:")
  tempadmin = read("*")
   if tempadmin == "" then
   print("Password cannot be blank")
   sleep(1)
   title()
   else break
   end
  end
  title()
  while true do
  print("Please re-enter password:")
  tempadmin2 = read("*")
   if tempadmin2 == "" then
   print("Password cannot be blank")
   sleep(1)
   title()
   else break
   end
  end
  title()
   if tempadmin ~= tempadmin2 then
   print("Passwords do not match. Please try again.")
   sleep(1)
   title()
   elseif tempadmin == tempadmin2 then
   deviceTable.pass = tempadmin break
   end
  end
  title()
  print("Thank you. Admin profile created.")
  sleep(1)
  table.insert(controlTable,deviceTable)
  saveState(controlTable)
  tempadmin = nil
  tempadmin2 = nil
  break
  end
end
end

The title() function actually is my way to redraw my title screen.

edit: To load the script, simply call this:

print("Please enter username")
local input = read()
local controlTable = loadState()
	if deviceTable.type == "Admin" and deviceTable.name == input then
		term.clear() term.setCursorPos(1,1)
		print("Please enter password")
		local input = read("*")
		local controlTable = loadState()
			if deviceTable.type == "Admin" and deviceTable.pass == input then
				--do stuff here
			end
	end

edit 2: Whoops, forgot to remane the variables in the example.

craniumkid22, on 13 August 2012 - 06:47 PM said:

local function saveState(saveTable)
	local file = fs.open("status", "w")
	if file then
		for eNum, eInfo in ipairs(saveTable) do
			file.writeLine(eInfo.type..","..eInfo.user..","..eInfo.pass)
		end
		file.close()
	end
end
local function loadState()
	local loadTable = {}
	local file = fs.open("status", "r")
	if file then
		readLine = file.readLine()
		while readLine do
			local lineTable = {}
			lineTable.type, lineTable.user, lineTable.pass = string.match(readLine, "(%w+),(%w+),(%w+)")
			if lineTable.type then
				table.insert(loadTable, lineTable)
			end
			readLine = file.readLine()
		end
		file.close()
	end
	return loadTable

Here is a save/load state function that I like to use. Basically, you add

local controlTable = {}

At the top of your code, and before declaring the new user/admin/whatever, use this:

local deviceTable = {type="NAME OF USER TYPE HERE"}

This is an example of declaring an admin:

while true do
local controlTable = {}
while true do
title()
local deviceTable = {type="Admin"}
while true do
print("Please enter Administrator name:")
deviceTable.color  = read()
  if deviceTable.color == "" then
  print("Admin name cannot be blank")
  sleep(1)
  title()
  else break
  end
end
title()
while true do
  while true do
  print("Please enter Administrator password:")
  tempadmin = read("*")
   if tempadmin == "" then
   print("Password cannot be blank")
   sleep(1)
   title()
   else break
   end
  end
  title()
  while true do
  print("Please re-enter password:")
  tempadmin2 = read("*")
   if tempadmin2 == "" then
   print("Password cannot be blank")
   sleep(1)
   title()
   else break
   end
  end
  title()
   if tempadmin ~= tempadmin2 then
   print("Passwords do not match. Please try again.")
   sleep(1)
   title()
   elseif tempadmin == tempadmin2 then
   deviceTable.status = tempadmin break
   end
  end
  title()
  print("Thank you. Admin profile created.")
  sleep(1)
  table.insert(controlTable,deviceTable)
  saveState(controlTable)
  tempadmin = nil
  tempadmin2 = nil
  break
  end
end
end

The title() function actually is my way to redraw my title screen.

edit: To load the script, simply call this:

print("Please enter username")
local input = read()
local controlTable = loadState()
	if deviceTable.type == "Admin" and deviceTable.name == input then
		term.clear() term.setCursorPos(1,1)
		print("Please enter password")
		local input = read("*")
		local controlTable = loadState()
			if deviceTable.type == "Admin" and deviceTable.pass == input then
				--do stuff here
			end
	end

why don't you just use textutils.serialize and deserialize for tabels ?

Hrm….I guess that would work…LOL. :P/>/>
I guess I am just used to writing to a file now for many different tables. :D/>/>

@craniumkid
It's even easier if you use the textutils API, it has a function serialize, which turns tables into strings and an unserialize function which turns strings into tables (if they are syntactically correct, of course).

@titantyler
You open files with "io.open (<file_name>, <mode>)", where <file_name> is the path to the file you want to open and <mode> is either "w" if you want to have write access to file or "r" if read access is sufficient for your application (if you just want to read something from a file, you really should not open it in write mode, so you don't accidentally mess something up).

As an example, I use the following API to load / write data from my programs to disk:

Spoiler

function configure (file, defaults)
	-- convenience function since I have had that function in most of my programs and I am lazy

	if not fs.exists (file) then
		storage.dump (file, defaults)
	end

	local conf = storage.load (file)
	if conf ~= -1 then
		return conf
	else
		shell.exit (-1)
	end

end

function load (file)
	
	if fs.exists (file) then
		local storage_file = io.open (file, 'r')
		local storage_data = storage_file:read ('*a')

		storage_data, _, _ = string.gsub (storage_data, 'n', ', ')
		storage_file:close ()
		return textutils.unserialize (storage_data)
	else
		return -1
	end

end

function dump (file, data)

	local _, _, path = string.find (file, "^(.*)/.*$")
	if not fs.isDir (path) then
		fs.makeDir (path)
	end

	local storage_file = io.open (file, 'w')

	local data = string.gsub (textutils.serialize (data), ',', 'n')
	storage_file:write (data)
	storage_file:close ()

end

EDIT: Damn, too late.

Ponder, on 13 August 2012 - 07:28 PM said:

@craniumkid
It's even easier if you use the textutils API, it has a function serialize, which turns tables into strings and an unserialize function which turns strings into tables (if they are syntactically correct, of course).

@titantyler
You open files with "io.open (<file_name>, <mode>)", where <file_name> is the path to the file you want to open and <mode> is either "w" if you want to have write access to file or "r" if read access is sufficient for your application (if you just want to read something from a file, you really should not open it in write mode, so you don't accidentally mess something up).

As an example, I use the following API to load / write data from my programs to disk:

Spoiler

function configure (file, defaults)
	-- convenience function since I have had that function in most of my programs and I am lazy

	if not fs.exists (file) then
		storage.dump (file, defaults)
	end

	local conf = storage.load (file)
	if conf ~= -1 then
		return conf
	else
		shell.exit (-1)
	end

end

function load (file)
	
	if fs.exists (file) then
		local storage_file = io.open (file, 'r')
		local storage_data = storage_file:read ('*a')

		storage_data, _, _ = string.gsub (storage_data, 'n', ', ')
		storage_file:close ()
		return textutils.unserialize (storage_data)
	else
		return -1
	end

end

function dump (file, data)

	local _, _, path = string.find (file, "^(.*)/.*$")
	if not fs.isDir (path) then
		fs.makeDir (path)
	end

	local storage_file = io.open (file, 'w')

	local data = string.gsub (textutils.serialize (data), ',', 'n')
	storage_file:write (data)
	storage_file:close ()

end

EDIT: Damn, too late.

ninja d 2 guys at the same time SUCCESS