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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

mdbfontsize

mdbFontSize(5)							 The m17n Library						    mdbFontSize(5)

NAME

       mdbFontSize - Font Size

DESCRIPTION

       In some case, a font contains incorrect information about its size (typically in the case of a hacked TrueType font), which results in a
       bad text layout when such a font is used in combination with the other fonts. To overcome this problem, the m17n library loads information
       about font-size adjustment from the m17n database by the tags <font, resize>. The data is loaded as a plist of this format.

       FONT-SIZE-ADJUSTMENT ::= PER-FONT *

       PER-FONT ::= '(' FONT-SPEC ADJUST-RATIO ')'

       FONT-SPEC ::=
	   '(' [ FOUNDRY FAMILY
	      [ WEIGHT [ STYLE [ STRETCH [ ADSTYLE ]]]]]
	    REGISTRY ')'

       ADJUST-RATIO ::= INTEGER

       FONT-SPEC is to specify properties of a font. FOUNDRY to REGISTRY are symbols corresponding to Mfoundry to Mregistry property of a font.
       See m17nFont for the meaning of each property.

       ADJUST-RATIO is an integer number specifying by percentage how much the font-size must be adjusted. For instance, this PER-FONT:

	   ((devanagari-cdac) 150)

       instructs the font handler of the m17n library to open a font of 1.5 times bigger than a requested size on opening a font whose registry is
       'devanagari-cdac'.

COPYRIGHT

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License
       <http://www.gnu.org/licenses/fdl.html>.

Version 1.6.2							    12 Jan 2011 						    mdbFontSize(5)
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