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Full Discussion: Dynamically setting of environment variable... Can it be done?
Top Forums Shell Programming and Scripting Dynamically setting of environment variable... Can it be done? Post 302555437 by Morelia on Wednesday 14th of September 2011 06:01:16 PM
Old 09-14-2011
Dynamically setting of environment variable... Can it be done?
Hi all,
I am fairly new to unix scripting and will like to know how to dynamically set the name of an environment variable to be used.

We have a .env file where we defined the names and locations of data files, trigger files, directories .... etc
Example of variables defined in .env
data_file_123=sales.dat
data_file_456=expenses.dat
data_file_789=profits.dat
I need to create a script (.ksh) that is flexible enough to load different data files depending on the parameter received. Also, based on this parameter I will need to verify if the files exist and this is where I will need to utilized the variables defined in the .env file.
The load script will received the parameter “123” or “456” or “789” (param1)

A couple of scenarios I tried that didn't work are:
if [[ ! -f $data_file_$param1 ]]; then .....

if [[ ! -f ${data_file_$param1} ]]; then .....
I hope I explained my issue adequately and that I've given enough information.
Thank you!
 

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LEARN ABOUT DEBIAN

actdiag

ACTDIAG(1)						      General Commands Manual							ACTDIAG(1)

NAME

       actdiag - generate activity-diagram image file from spec-text file.

SYNOPSIS

       actdiag [options] files

DESCRIPTION

       This manual page documents briefly the actdiag commands.

       actdiag is a program that generate activity-diagram image file from spec-text file.

OPTIONS

       These  programs	follow	the  usual  GNU  command  line	syntax, with long options starting with two dashes (`-').  A summary of options is
       included below.	For a complete description, see the Info files.

       -h, --help
	      show this help message and exit

       -a, --antialias
	      Pass diagram image to anti-alias filter

       -c FILE, --config=FILE
	      read configurations from FILE

       -o FILE
	      write diagram to FILE

       -f FONT, --font=FONT
	      use FONT to draw diagram

       -s, ----separate
	      Separate diagram images for each group (SVG only)

       -T TYPE
	      Output diagram as TYPE format

SEE ALSO

       The programs are documented fully by
       http://tk0miya.bitbucket.org/actdiag/build/html/index.html

AUTHOR

       actdiag was written by Takeshi Komiya <i.tkomiya@gmail.com>

       This manual page was written by Kouhei Maeda <mkouhei@palmtb.net>, for the Debian project (and may be used by others).

								   June  5, 2011							ACTDIAG(1)
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