Build a Better Startup program

So The first program I tried to make was a login program that would require a password before any content on the computer could be accessed. The code is as follows;

textutils.slowPrint("Welcome User")
write("enter password: ")

answer = read()
if answer == "password"
then
shell.run("clear")
sleep(.1)
texutils.slowPrint("CraftOS 1.3")
sleep(1.5)
textutils.slowPrint("Welcome ResistAnce")
else
textutils.slowPrint("Wrong Password")
sleep(2)
textutils.slowPrint("shutting down computer")
sleep(1.3)
os.shutdown()
end

But there is an obvious problem with this is the fact that you can hold ctrl+T to terminate the program and then access all of the content on that computer. What I'm trying to do is prevent the user from being able to terminate the program, but I honestly have no clue how to go about doing that… Any suggestions?

Check the tutorials forum, there's already a post on how to do this. And there's a lot of post with the same question, so check out some of them.

Here ya go! Hope you enjoy.

local oldPull = os.pullEvent;
os.pullEvent = os.pullEventRaw;
--Code here
os.pullEvent = oldPull;

EmTeaKay, on 13 May 2012 - 03:19 AM said:

Here ya go! Hope you enjoy.

local oldPull = os.pullEvent;
os.pullEvent = os.pullEventRaw;
--Code here
os.pullEvent = oldPull;

Why overcomplicate it?

-- Here is your password variable. Change it to whatever you like.
password = "whatever"

textutils.slowPrint("Welcome User")
write("enter password: ")

status, answer = pcall, (read,'*')
if answer == "password" then
shell.run("clear")
sleep(.1)
texutils.slowPrint("CraftOS 1.3")
sleep(1.5)
textutils.slowPrint("Welcome ResistAnce")
else
textutils.slowPrint("Wrong Password")
textutils.slowPrint("shutting down computer")
sleep(0.1)
os.shutdown()
end

The differences are:

1. Instead of os.pullEventRaw() (Or whatever), I used pcall.
2. I made it print out as * instead of letters.
3. I changed the sleep at the end. It might still be terminable

Hope I helped (And didn't confuse you (Like him ^))

Your version is the one overcomplicating things. His will affect read(), sleep() and os.pullEvent() calls, so it is simpler and more effective.

Ok, that makes some sense, so basically the pcall is what replaces read(). And also, would using a line of code like;textutils.slowPrint("………………..") instead of sleep(#) help prevent the user from terminating the command? It could serve the same purpose of delaying code but couldn't textutils.slowPrint also cause the user to be able to terminate the program?

If that even made any sense…

slowPrint uses sleep() so there would be no advantage. I hate to say it, but the simplest is the os.pullEventRaw one, provided you put it back after you've finished running your code.

Lyqyd, on 13 May 2012 - 03:21 PM said:

Your version is the one overcomplicating things. His will affect read(), sleep() and os.pullEvent() calls, so it is simpler and more effective.

His is, however, terminateable.

Well, I can do some testing once I actually get on minecraft, (Can't at the moment) But I will try all of these different ways of going about writing the code and see which ones can be terminated.

mrminer84403, on 13 May 2012 - 06:59 PM said:

Lyqyd, on 13 May 2012 - 03:21 PM said:

Your version is the one overcomplicating things. His will affect read(), sleep() and os.pullEvent() calls, so it is simpler and more effective.

His is, however, terminateable.

Nope. Try it sometime. Just use the code he put up there, put a call to read() in there. While it's waiting for input, try to terminate it. Ctrl-R and -S will always work, of course, but that will bypass the Ctrl-T detection.