Return true if printers installed

Question

We are trying to push out a script that deletes all printers.  That part of it works just fine.

We use the following:

# Get all printers and remove them
# Log printer names
echo "Removing all printers..."
for printer in `lpstat -p | awk '{print $2}'`
do
  echo $printer >> "/Library/LOGGINGFOLDER/$logname"
  lpadmin -x $printer
done

We use logging in case we need to reinstall anything later.

Problem is that when there aren't any printers to delete then the exit code is 1 and an error notification is triggered.  How do I test if printers are installed before continuing?  else would be exit with code 0 (success).

Thanks for the help!

mm2270 · Answer

Simplest thing is to store the results of lpstat -p | awk '{print $2}' into a variable first in the script. Then have an if/then block that tests to see if the variable is populated with data or not. It would be empty if no printers are installed. If it's not a null value, then proceed with the removals.#!/bin/bashInstalled_Printers=$(/usr/bin/lpstat -p | awk '{print $2}')if [ -n &#034;$Installed_Printers&#034; ]; then    for printer in $Installed_Printers; do        echo $printer >> &#034;/Users/mikem/Desktop/logfile1.log&#034;        /usr/sbin/lpadmin -x $printer    doneelse    echo &#034;No printers installed&#034;fi

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