UNIX for Dummies Questions & Answers

Hi all,

After so many tries and searching online for ideas, I had trouble accomplishing this. Is it possible to do something like this in KSH to run an if statement on a return code?

Unfortunately the code below fails... Would anyone know how to fix the below attempt?

Code:

if [ "$`{pkginfo TestPackage}`" == "0" ]
then
  print "TestPackage DETECTED"
else
  print "TestPackage NOT detected"
fi

Other info:
When running "pkginfo TestPackage", I did notice when it does exist, afterward typing in "echo $?" will return 0 (success), and when it doesn't exist, it will return 1 (error).

But I wouldn't want the script to print the output of the "pkginfo TestPackage" to the user. I'm hoping to "only" output from the print command in the if statement.

Thanks again everyone for your help.
CG

I would go for something like this:

Code:

pkginfo TestPackage > /dev/null 2>&1         # we do not want any output
if [ $? = 0 ]; then
   echo yeah
else
   echo doh
fi

And btw, this looks strange:

Code:

"$`{pkginfo TestPackage}`"

If you want to execute a command, don't write it like a variable, ie. leave out the $ and the {}. This is what works:

Code:

VAR=$(somecommand)
# or
VAR=`somecommand`

or use it inline

Code:

if pkginfo TestPackage > /dev/null 2>&1 
then
   echo yeah
else
   echo doh
fi

Thanks guys

Wow... so simple yet I tried everything but that (go figure). Thank you so much for your help!

cg