Using Variables to Set Other Variables

superdelic · #1 (**permalink**) 04-20-2005

I have a script that I'm trying to shorten (below) by removing repetitive code.
if [[ -a ${abccontrols}/Commodity_NDM_${alt_db}_done ]]
then
commodity_ndm_done=Y
fi

if [[ -a ${abccontrols}/Customer_NDM_${alt_db}_done ]]
then
customer_ndm_done=Y
fi

if [[ -a ${abccontrols}/Department_NDM_${alt_db}_done ]]
then
department_ndm_done=Y
fi

if [[ -a ${abccontrols}/Division_NDM_${alt_db}_done ]]
then
division_ndm_done=Y
fi

if [[ -a ${abccontrols}/Order_Detail_NDM_${alt_db}_done ]]
then
order_detail_ndm_done=Y
fi

if [[ -a ${abccontrols}/Order_Summary_NDM_${alt_db}_done ]]
then
order_summary_ndm_done=Y
fi

if [[ -a ${abccontrols}/Witron_Forward_Pick_NDM_${alt_db}_done ]]
then
witron_forward_pick_ndm_done=Y
fi

And I tried using a loop as such:
{
echo "Commodity"
echo "Customer"
echo "Department"
echo "Division"
echo "Order_Detail"
echo "Order_Summary"
echo "Witron_Forward_Pick"
} |
while read v_type
do
if [[ -a ${abccontrols}/${v_type}_NDM_${alt_db}_done ]]
then
$(echo ${v_type} | tr '[A-Z]' '[a-z]')_ndm_done=Y
fi
done

Naturally, it doesn't work. Can I make variables set other variables by this method or another?

Just Ice · #2 (**permalink**) 04-20-2005

i've tested creating a variable with another variable but it doesn't work ... so here's a consolation prize ... (i use "-f" to check if the file exists but you can change as required) ...

Code:

for v_type in Commodity Customer Department Division Order_Detail Order_Summary Witron_Forward_Pick
do
    if [ -f ${abccontrols}/${v_type}_NDM_${alt_db}_done ]
    then
          case $v_type in
          Commodity)   commodity_ndm_done=y ;;
          Customer)   customer_ndm_done=y ;;
          Department)   department_ndm_done=y ;;
          Division)   division_ndm_done=y ;;
          Order_Detail)   order_detail_ndm_done=y ;;
          Order_Summary)   order_summary_ndm_done=y ;;
          Witron_Forward_Pick)   witron_forward_pick_ndm_done=y ;;
          esac
    fi
done

Perderabo · #3 (**permalink**) 04-21-2005

Not tested, but I think this will work....

Code:

#! /usr/bin/ksh
typeset -l var
LIST="Commodity Customer Department Division Order_Detail Order_Summary Witron_Forward_Pick"
for v_type in $LIST ; do
    if [ -f ${abccontrols}/${v_type}_NDM_${alt_db}_done ] ; then
                var=${v_type}_ndm_done
                eval \$$var=y
    fi
done
exit 0

superdelic · #4 (**permalink**) 04-21-2005

Thanks, guys.

Perderabo, your code worked when I removed the \$ from the eval command. But it's pretty much what I was looking for.

#! /usr/bin/ksh
typeset -l var
for v_type in Commodity Customer Department Division Order_Detail Order_Summary Witron_Forward_Pick
do

if [[ -a ${abccontrols}/${v_type}_NDM__done ]]
then
var=${v_type}_ndm_done
eval ${var}=Y
else
var=${v_type}_ndm_done
eval ${var}=N
fi

done
echo "Job completion status is:"
echo "Commodity_NDM = ${commodity_ndm_done}"
echo "Customer_NDM = ${customer_ndm_done}"
echo "Department_NDM = ${department_ndm_done}"
echo "Division_NDM = ${division_ndm_done}"
echo "Order_Detail_NDM = ${order_detail_ndm_done}"
echo "Order_Summary_NDM = ${order_summary_ndm_done}"
echo "Witron_Forward_Pick_NDM = ${witron_forward_pick_ndm_done}\n"

and the output is correct (the last file being missing)
Job completion status is:
Commodity_NDM = Y
Customer_NDM = Y
Department_NDM = Y
Division_NDM = Y
Order_Detail_NDM = Y
Order_Summary_NDM = Y
Witron_Forward_Pick_NDM = N

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