Thread: Unix probelm--can you help me?

I want to write a shell script which will lock the terminal and prevent other people from using it. It must prompt your twice to entry a key, if the keys match, it should sit in a loop prompting a user to enter a third key. If the keymatches the ones you entered the script should exit to the shell prompt. If i enter the wrong key 5 time, the system will log off.
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I think i cannot use vlock here.

What shell are you doing this in and why should we do your hw? Why not post what you already have and then we MIGHT help you debug it.

Ill see what I can do when I get home

But what you gave should give him a good idea. For his HW

Code:

newt.c_cc[VQUIT]  = 0;

Does this disable the quit control character or set it to 0?

Can't you enter ascii-code 0 using alt and keypad? Or cntrl-@?

I currently don't have a linux box running to "see if I can break it". (Did I break it?)

You could disable the checking of control characters all together by by removing ISIG from c_lflag as well.

gg

vVv no I was not tyring to make you feel guily I though you didnt see it I'm my first post. sorry.

'vlock' utility can lock the terminal. but if i use it. It propmt to input the user's pin.If the user's pin is incorrect, it prompt to input the root's pin.So i cannot display any other information until i input the correct pin.