topic Re: Disable keys? in Operating System - HP-UX

Disable keys?

Chua Wen Ching — Sun, 13 Oct 2002 09:57:39 GMT

If i want to disable ctrl + c, i will use:
trap '' 1 2 3 15

Can i use trap to disable enter key, backspace key, spacebar key, F1 key, etc? Is there other solutions than using trap.

Re: Disable keys?

Chua Wen Ching — Sun, 13 Oct 2002 10:05:19 GMT

I am using HP-UX 10.20. Can anyone show me an example in bourne shell script? Thank you.

Re: Disable keys?

harry d brown jr — Sun, 13 Oct 2002 12:03:11 GMT

You really can never disable a key on a keyboard unless you take a five pound sledge hammer to it.

You CAN though, ignore the key with your application. Most key strokes can be ignored via stty.

man stty

live free or die
harry

Re: Disable keys?

Chua Wen Ching — Sun, 13 Oct 2002 15:48:24 GMT

You mean i need to specify stty command in my application. What if i set the intr key in my application to "^H" but my .profile intr key is "^c". So when i execute it, which one come first? Thank you.

Re: Disable keys?

Bill Hassell — Sun, 13 Oct 2002 21:28:06 GMT

What you are asking is a more general question: how to process every keystroke, sort of like vi? The answer is that you can use stty to set the appropriate options and then have a very long shell script to handle each character based on the previous character(s).

NOTE: The trap command does not disable a specific character. Instead, the trap numbers refer to kill signals (use kill -l to see a list) and some of these kill signals are assigned by stty to special characters.

Re: Disable keys?

Chua Wen Ching — Sun, 13 Oct 2002 23:15:29 GMT

Oh, now i understand already. Anyway thanks for your help.