who command

dory550 · 03-17-2007, 08:03 PM

Hi guys

What Bash script do I use to test the true of false results of the command 'who | grep pts'
how do I assign the results to a variable?
Thank you
Dory

Tinkster · 03-17-2007, 08:27 PM

Hi, and welcome to LQ!

The result is in $?

Code:

who | grep pts > /dev/null 2>&1
result = $?

Cheers,
Tink

dory550 · 03-18-2007, 03:41 AM

Tink
echo $? produces 1 or 0

result = $? #produces an error( -bash: results: command not found )

thanks
Dory

Tinkster · 03-18-2007, 12:42 PM

Sorry about that; give the spaces around the = a miss.
And yes, 0 is success, 1 is failure.

Cheers,
Tink

dory550 · 03-20-2007, 08:06 PM

Tink
Thank you for your help
Dory

Tinkster · 03-21-2007, 12:46 AM

You're welcome, glad it works for you.

Cheers,
Tink