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Problem evaluating condition

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# 15  
Old 01-27-2018
It looks like RudiC has identified the source of your problem.

I'm glad that my idea of comparing internal and external invocations of ps showed us that something in your script is affecting the output from ps.

So, try running the command:
Code:
grep COLUMNS scriptname

where scriptname is a pathname to your shell script. And, add:
Code:
echo COLUMNS is $COLUMNS

to the list of things to run inside your function and outside your script to verify that we have identified the problem.

When you obfuscated the output of the uname -n commands, you may have hidden what I was looking for. I don't care about the name of your system, but I do want you to verify that the output from both invocations of uname produced exactly the same output. (We need to be sure that there isn't an ssh or something in your script that is causing some of the code to be executed on a different server!)
# 16  
Old 01-29-2018
Quote:
Originally Posted by RudiC
Hold on, hold on! How do you explain the difference in above outputs: . . . Was the COLUMNS shell variable modified? The second output is clipped at 60 chars... strange
Bingo! The code that called the function looked like this:
Code:
ORACLE_SID=''
PS3='Select  database: '
savcol=$COLUMNS
export COLUMNS=20
#
while [[ $ORACLE_SID = "" ]]; do
  select ORACLE_SID in `egrep -i "product/12" /etc/oratab |grep -v "listener"|\
      awk -F\: '{print $1}'|sort` "All of the above" "None of the above" ; do
    if [[ $ORACLE_SID = "" ]]; then
         echo
         echo "Please enter a valid number.  Retry.";
         echo
    elif [[ $ORACLE_SID = "None of the above" ]]; then
         exit ;
    elif [[ $ORACLE_SID = "All of the above" ]]; then
         get_all_db;
    else {
          get_one_db;
         }
    fi
    break
    done
done
#
unset PS3
export COLUMNS=$savcol

It was based on code from a previous script, where the IF in the loop was just setting values to be acted on after exiting the loop. In this script I decided to create functions to be executed directly from the IF statement, and in that forgot about the need to reset the COLUMNS. I added that statement into the IF construct, just before calling the functions:
Code:
    elif [[ $ORACLE_SID = "All of the above" ]]; then
         export COLUMNS=$savcol;
         get_all_db;
    else {
          export export COLUMNS=$savcol;
          get_one_db;
         }
    fi

and all is working correctly.

Thanks for all the assistance, and patience.
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