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incrementing the variable name along with the data?

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# 1  
Old 12-19-2011
incrementing the variable name along with the data?
Hello folks.

I am trying to increment my variable names to match a counter that is to be used later on...

Basically, i have a for loop that lists directories (for example TEST_OS DVP_OS PROD_OS ) but this loop is not static, it may contain 3 directory once and the next run 5 directories.

I then, want to assign "selection1" to TEST_OS, "selection2" to DVP_OS and "selection3" to PRD_OS. Again, those are not static...

Here is the code i have for now, but the "combining" of variables is not working...Smilie (selection$counter=$i) What i want, is that the variable selection1=TEST_OS and so forth...

Code:
BKPSETS=`ls -altr /etc/workdir/ | grep $OS | awk '{print $9}'`
counter=1

for i in $BKPSETS
do
        echo $counter "-" $i
        selection$counter=$i
        echo $selection

        counter=`expr $counter + 1`
done

read CHOICE

if [[ $CHOICE -ge $COUNTER ]]
then
        echo "No such choice available.  Quitting!"
        exit 1
        else
        echo "You've selected option $CHOICE"
fi

# 2  
Old 12-19-2011
Could you please elaborate more: which OS and shell are you using?
Could you post an example of the directory structure and what should be the output (variable content) based on that structure?
# 3  
Old 12-19-2011
Code:
eval "selection$counter=\$i"

counter=$(( $counter + 1 )) ## no need for an external command

Or
Code:
eval "selection$(( counter += 1 ))=\$i"

# 4  
Old 12-19-2011
The script in Post #1 is not sound in this context.

Please post a specification for what you are trying to achieve - including sample input and sample output - complete with a description of the process.
It is impossible to determine the process based on faulty code and a garbled process specification.

Further to radlouv, please do post what Operating System and version you have and what Shell you prefer.

Please take the time to describe the process such that an 11-year-old would understand.
# 5  
Old 12-21-2011
Sorry folks for assuming it was clear...at least it was to me... Smilie

This is a Linux box, ksh. Technically, i have this output as my $bkpsets variable:

Code:
 TEST_OS DVP_OS PROD_OS

As mentionned, it may contain 3 instances as in this example, but my be 5 the next time around...

From there, i want to be able to set my "Selection" variable to

Code:
 selection1=TEST_OS selection2=DVP_OS selection3=PROD_OS

That way, i can do something else later, based on that selection.
# 6  
Old 12-21-2011
OK,
given you're using the KornShell you could use arrays, there's no need to use eval:

Code:
$ set -A a TEST_OS DVP_OS PROD_OS
$ print "${a[0]}"
TEST_OS
$ print "${a[1]}"                                                                                                
DVP_OS
$ print "${a[@]}"
TEST_OS DVP_OS PROD_OS

# 7  
Old 12-21-2011
Quote:
Originally Posted by cfajohnson
Code:
eval "selection$counter=\$i"

counter=$(( $counter + 1 )) ## no need for an external command

Or
Code:
eval "selection$(( counter += 1 ))=\$i"

Thanks for this code...Can i "echo" this variable to see its content, just to debug for now...Since this is using the eval, is it echoed differently? a simple echo won't do. I get no errors, but no idea what is in the "selection" variable.

Thanks.

---------- Post updated at 02:05 PM ---------- Previous update was at 02:00 PM ----------

Thanks radoulov. Let's see if i can get this to work...
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