terminal validation

xviddivxoggmp3 · 03-12-2007, 11:16 PM

i have a need to write a script in csh that detects what terminal you are sitting at prior to allowing execution of the script. this has to test to make sure it is only executable at this specific terminal.
i have tried the following, but it doesn't work.
please any guidence would be appreciated.

Code:

set stMasterTerminal = "/dev/pts/2"
set stUserTeriminal = `tty`

if ($stMasterTerminal == $stUserTerminal) then

#execute some code

else

    echo "Invalid Terminal"
    exit 1

endif

Quigi · 03-13-2007, 09:46 AM

First off, it works (after the obvious changes).

When posting, don't just say "it doesn't work". In general, state the expected and actual results. This has been said hundreds of times.

In your case, I guess as follows. Tell me whether I'm right or wrong.
Expected: either no output or "Invalid Terminal", depending on the tty.
Actual: "stUserTerminal: Undefined variable."

That error happens because of a typo, and that's the obvious change:

Code:

set stUserTeriminal = `tty`

By the way, why do you "have a need to write a script in csh"?

xviddivxoggmp3 · 03-13-2007, 12:09 PM

i made the correction, but still it does not work.
i'm still getting an error

Quote:

0: event not found

I need it to detect if an invalid terminal is being used to execute a script.
i would rather code this in korn instead of csh, but i have been requested to do it in csh.
please if someone has any ideas on how to get this to work. i would appreciate the help.

Quigi · 03-13-2007, 12:21 PM

Again: did I guess your expectations right?

Code:

0: event not found

This doesn't make sense. Are you sure you're running exactly the script above, less that one "i"?

Check your PATH. You might think you're running your script but executing something completely different?
(E.g., novices name their program "test", type "test" with much anticipation, and execute /usr/bin/test.)
How do you invoke the script?

xviddivxoggmp3 · 03-13-2007, 12:24 PM

script being ran as ./security.scr
executed in my current working directory

Code:

#!/bin/csh

set verbrose
set xtrace

if ($#argv != 0)then
        echo "This script requires 0 arguements"
        echo "Usage:  $0"

        exit 1
endif

set stMasterTerminal = "/dev/pts/3"
set stUserTerminal = `tty`
eval stUserTerminal

echo $stMasterTerminal
echo $stUserTerminal  #these echos show the values as identical

if ($stMasterTerminal == $stUserTerminal) then



        exit 0

else



        exit 2

endif

xviddivxoggmp3 · 03-13-2007, 12:44 PM

sorry to bump the thread, but does anyone have any idea that might help.
the changes i made in my script are very minor and i do not know what this

Quote:

0: event not found

error is or how to get the script to work.