Passing dynamic variable within another variable. Post: 302881580

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Top Forums Shell Programming and Scripting Passing dynamic variable within another variable. Post 302881580 by Cyril Jos on Monday 30th of December 2013 10:45:34 AM

12-30-2013

Registered User

Passing dynamic variable within another variable.

I have a small program which needs to pass variable dynamically to form the name of a second variable whose value wil be passed on to a third variable.

***************** Program Start ******************

Code:

LOC1=/loc1
PAT1IN=/loc2
PAT2IN=/loc3
if [ -f $LOC1/* ]; then
for fpattern in `cat $script/filepattern.txt`
do 
for ffilename in `find $LOC1/ -type f`
do
filename=`echo $ffilename | cut -d "/" -f 3`
file=`echo $filename | cut -d "_" -f 1`
case "$file" in
$fpattern)
INLOC=${${file}IN}
echo $INLOC
echo $filename
;;
esac
done
done 
else
echo "Exiting Job as no files present."
exit
fi

***************** Program End ******************

List of files present in the /loc1 are as below

Code:

/loc1/PAT1_test.txt
/loc1/PAT2_test1.txt

content of filepattern.txt are as below

Code:

PAT1
PAT2

when i execute the program, i keep getting this error

Code:

INLOC=${${file}IN}: bad substitution

Please let me know if i am doing something wrong. or is there an alternate way to achieve this without having to use to much variables.

expected output is:

Code:

/loc2
PAT1_test.txt
/loc3
PAT2_test1.txt

Last edited by bartus11; 12-30-2013 at 11:50 AM.. Reason: Please use code tags

Cyril Jos

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LEARN ABOUT DEBIAN

incr

incr(3tcl)						       Tcl Built-In Commands							incr(3tcl)

__________________________________________________________________________________________________________________________________________________

NAME

       incr - Increment the value of a variable

SYNOPSIS

       incr varName ?increment?
_________________________________________________________________

DESCRIPTION

       Increments the value stored in the variable whose name is varName.  The value of the variable must be an integer.  If increment is supplied
       then its value (which must be an integer) is added to the value of variable varName;  otherwise 1 is added to varName.  The  new  value	is
       stored as a decimal string in variable varName and also returned as result.

       Starting  with  the Tcl 8.5 release, the variable varName passed to incr may be unset, and in that case, it will be set to the value incre- |
       ment or to the default increment value of 1.

EXAMPLES

       Add one to the contents of the variable x:
	      incr x

       Add 42 to the contents of the variable x:
	      incr x 42

       Add the contents of the variable y to the contents of the variable x:
	      incr x $y

       Add nothing at all to the variable x (often useful for checking whether an argument to a procedure is actually integral and  generating	an
       error if it is not):
	      incr x 0

SEE ALSO

       expr(3tcl)

KEYWORDS

       add, increment, variable, value

Tcl																	incr(3tcl)

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LEARN ABOUT DEBIAN

incr