SEN's Utilites: Advanced Code Security [TUT] [EASY]

NOTIFICATION: This is a TUTORIAL, not a response!

Welcome,

I made a simple script which allows you EASLY and fastly know 'How to make a Code on my Computer'.

It's pretty simple ("Yes for you… but me?"),
For the start, let's delete the computer name:

shell.run('clear') – shell or term denotes the screen/api/computer. 'run' is like a run program. clear is the command
term.clear()

Now, make our codes:

– first, i will precise one, we will make by a 'Function' to make a returnement!

local cmdPass = "Command" – 'local', you don't need to use it, just i like to precise local…
– "Command"… why using ""? the "" denotes text (called 'string'), and all other NUMBERS without "" are the numbers to calculate (called 'Int')
– the text in "" denotes the value (string)

local Pass = "Door"

— the cmdPass and Pass you can rename to what YOU! want

We made two passwords: "Command" (to access computer's commands) and "Door" (to open the locked door)
Now, we will make some 'protocols:'

—————————>>> ALERT! Our 'local try' won't work if there is not a return, let's make a function!

local tryMax = 3 – Max wrong passwords
local try = 0 – Wrong passwords
local pWord = "*" – pWord will be used later with read()

function ENTERPASSWORD() <—- Our function here. After wrong password, we will restart the function until closing or good password!

Now, the questions and rest of scripting:

write("Enter Password: ("..try.."/"..tryMax.."): ") – 'write', what's that?!!
– write OR print shows texts on the screen, but are different:
– write shows TEXT ONLY, and print can show "Command print(…): <Text>" on a monitor.
– I don't know exactly the difference… but it's like this!

– you remember 'pWord' ? (*), now we will use it like a char!
– read() can hide letters by a word, and this word will be pWord
– like when you enter or register a password, you can't see letters but a 'char' like * or #

local sel = read(pWord)
– os.read() or read() allows the player to CHAT with the computer, then, after pressing ENTER, the computer reads the text.

Now, time to the protocols!!!

if sel == cmdPass then – 'if' starts (a) protocol(s), must be finished by a simple 'end' (only in lua scripting)
– you can see 'sel' was used with 'local sel = read()'

shell.run('clear')
term.clear() – as you want…

–write or print…
print("Command Access Granted!") – Says to the player that he is entering the computer's command!

sleep(1.5) – Our sleep, sleep is like a wait(how many seconds?), simply enter a value of seconds

term.clear()
– Nothing, because let the player now enter his commands. End of cmdPass!
elseif sel == Pass then – elseif is if like a 'try me now if 'if sel == cmdPass' won't work!', don't need to be finished with a END, arleady 'if' needing it!

term.clear()

print("Access Granted!") – Openning the door!

sleep(1.5)

term.clear()

redstone.setOutput("left/right/back/top/bottom", true) – redstone command allows you to control redstone (the computer like a lever)
– setOutput is the command do set the lever … ( " what side? ", true or false? (on or off?))

local openTime = 5 – in seconds, how many time the door will be openned?

for i=openTime, 1, -1 do – the 'for' is like a counter, first value is FROM, next is TO, and last is STEP SIZE (enter minus to decrease, and nothing to increase)
– 'for' need an end!
term.clear() – clear the last text
write("Closing in "..i.." second(s)") – 'i' is the number what for is on
sleep(1)
end

redstone.setOutput("left/right/back/top/bottom", false) – close the door

os.shutdown() – shutdown computer

os.shutdown() and shell.run('shutdown') are differents: os.shutdown() shutdowns computer immediately, and shell.run('shutdown') runs the default shutdown command (like GoodBye… *closed*)

else – else without 'if' in end is the last possible choice in the 'if' extension
– if wrong password…

term.clear()

if try < tryMax then – if try if lower than tryMax then simply add one more until try == tryMax
try = try + 1
write('Wrong password!')
else
write('Wrong password. Closing computer…')
sleep(2)
os.shutdown()
end
sleep(1.5)
ENTERPASSWORD() – return to the beginning of 'local try' if wrong password, but we have one more wrong password!

end – end of the 'if'

end – END OF FUCTION! One command more and we're done !

ENERPASSWORD() – we must precise AFTER a function to laounch it, a function without 'laounch' can't run automatically!


THE PASTEBIN: http://pastebin.com/JaFvN9xm


Thanks for reading.
I'm french, sorry for extra big and large errors!!!
My first post on this forum.

P.S.: I'm LUA pro, YOU MUST tell me if you have a problem or question!!!

FOR MODS: i do a fatal error, please move this thread to 'Tutorials' section.

Could you put the entire code on pastebin? So we can see it in it's finished state.

Also, you can add some

 tags to make it easier for the eye to read!

My brain is going do blew up, but okay.

here: http://pastebin.com/JaFvN9xm

not guaranteeing there is NO errors!