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how to disable keys in script

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# 1  
Old 09-10-2008
how to disable keys in script
Hi there all..

How can I set keys to be disabled in a shell script menu?
So people cant escape the script with Ctrl+C or someting.
I have a menu people have to see and when they get out of the menu script they have to be logged off again.
That all works fine.
But when they Ctrl+C they just jump out of the script and back in the shell and can do anything they want.


Thanx!!
Draco
# 2  
Old 09-10-2008
You will need to use signal handling function to trap the signal and then do something. Read man pages for signal

cheers,
Devaraj Takhellambam
# 3  
Old 09-10-2008
Arrange for the shell script or program presenting the menu to be the login shell. Do not have a parent shell for them to escape to. A shell can replace itself with a line like:
exec /usr/local/bin/menuthing
but you should explore simply having /usr/local/bin/menuthing be the login shell given to the user in /etc/passwd.

And once you do this, allow them to escape at will, thus logging themselves off.
# 4  
Old 09-10-2008
Another possibility is to "exec" the script in the .profile of the user.

Regards
# 5  
Old 09-11-2008
To find out what control keys are set and what is on them, run the following command in a user context:
stty -a
For example to disable Ctrl/C in a script or the user's .profile .
stty intr ""
# 6  
Old 09-11-2008
Quote:
Originally Posted by draco
Hi there all..

How can I set keys to be disabled in a shell script menu?
So people cant escape the script with Ctrl+C or someting.
Code:
trap "" INT

See your shell man page for more information on trap.

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