Originally posted by: SystemAdmin

Hi, I am a intermediate programmer, experienced in Java, REXX, and other script languages, and am new to KSH. I am trying to combine two variables to evaluate to the combination, but it seems I may have a) poor syntax, or b) wrong code structure.
I've researched this in many places and read through documentation, but am convinced that the answer lies in "experience". To me, this seems to be a very rudimentary question, yet try as I might, just about every combination I can think, I've yet to achieve the correct results.

So here's the scenario:

I created (and exported) some environmental variables within my .profile. They are $ENV1, $ENV2, $ENV3 and $VARLINES. These evaluate correctly when performing an echo of the vars.

I then try to combine the "$ENV" with a generated number "$snum" and would like these var to evaluate properly.

In the code snippet attached, line 15 is the line I need evaluated properly
e.g. SERVERS$snum=$ENV$snum needs to evaluate to SERVERS[1] = $ENV1
SERVERS[2] = $ENV2 and finally SERVERS[3] = $ENV3

Attached is a code snippet to demonstrate.
Thank you in advance
#AIX-Forum

Originally posted by: esv

here is how I did it...
set -A SERVERS
ENV1=1
ENV2=2
ENV3=3

for i in 1 2 3
do
let SERVERS$i=ENV$i
done

for i in 1 2 3
do
echo ${SERVERS$i}
done

best regards & happy new year.
esv
#AIX-Forum

Originally posted by: esv

darn, it does not paste well. here it is once more, I've attached a text file with the right syntax.

best regards,
esv.

set -A SERVERS ENV1=1 ENV2=2 ENV3=3 

for i in 1 2 3 

do let SERVERS[$i]=ENV$i done   

for i in 1 2 3 

do echo $
{SERVERS[$i]
} done

#AIX-Forum

Originally posted by: SystemAdmin

Thank you Enrique

This is close to what I need.

The format of the displayed variable "SERVERS$i=ENV$i" works correct.

The difficulty right now seems to be properly evaluating the right side of the set command.

I cannot ever get the Environment values developed in .profile to load in this array.
The passed vars are text values:
e.g. $ENV1="LSR"
$ENV2="LENDB"
$ENV3="LNOTES"

So, trying a substitution in your code as ENV1=$ENV1, ENV2=$ENV2, ENV3=$ENV3 e.t.c fails with:

test4.sh[7]: LSR: bad number
test4.sh[7]: LENDB: bad number
test4.sh[7]: LNOTES: bad number

Also, because the number of passed ENV vars is variable I cycle though a loop (and That works fine)
so it's just getting the value of $ENV1, $ENV2 e.t.c into the SERVERS$i array that still fails.

I may just have to resort to reading the input file again as .profile does, but did not want to do this.
#AIX-Forum

Originally posted by: SystemAdmin

Ok, I've resolved to message "bad number" by removing the "let" when loading the array.

So now, I need to be able to cycle the number for 1 to the value of LINES using substitution.

LINES = 3        # This variable 
"3" is not set here, its value is unknown until .profile reads a file # therefore the number may be 3,5,10,20 whatever. i=1 until [ $i - gt $LINES ]   

do SERVERS[$i
}]=$ENV$i   # <--- need to have the right side of 

this equal iterate from $ENV1 through $ENV3     echo the servers listed so far are $
{SERVERS[$i]
}   ((i=i+1))   done

#AIX-Forum

Originally posted by: SystemAdmin

Problem solved!

The setting of the array with passed ENV vars has a definitive syntax.

It is:

SERVERS[$j]=$
{env
}

The test code snippet is:

j=1 set - A SERVERS 

while read LINE 

do firstchar=`expr substr 
"$LINE" 1 1` 

if [[ $
{#LINE
} > 2 ]] ; then 

if [[ 
"$firstchar" != 
'#' ]] ; then ##  parse the variables and export echo $LINE | read env rest SERVERS[$j]=$
{env
} ENV[$j]=$
{env
} ((j=j+1)) fi fi   done < $IDFILE

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