05-14-2014
Get variables from expression
Hi,
I have a k-shell master script which reads variables that are globally set and this script is modified by users per their requirements and users define few other variables.
In the script few expressions are evaluated which include both global variables and those added by the user, I would like to parse the expressions to get the list of variables used in the expression and check if they are set or not set before evaluating the expression.
The expressions are similiar to SQL where clause and I would like to know if there is any handy utility that parses the expressions and returns only the variables eliminating all constants, relational operators, arithmetic operators and logical operators ?
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lr_environment
LR_ENVIRONMENT.IN(1) LogReport's Lire Documentation LR_ENVIRONMENT.IN(1)
NAME
lr_environment - Export Lire configuration in shell script form
SYNOPSIS
eval `lr_environment`
DESCRIPTION
The lr_environment command is used to import the Lire configuration in Lire shell scripts.
All of Lire configuration variables will be written in a format that can be evaled by the shell.
Shell scripts don't usually have to use that command, since it is done by the defaults file sourced by each command.
The old names used by when the configuration was done in shell script are also exported by this script for backward compatibility.
AUTHOR
Francis J. Lacoste <flacoste@logreport.org>
VERSION
$Id: lr_environment.in,v 1.12 2006/07/23 13:16:33 vanbaal Exp $
COPYRIGHT
Copyright (C) 2003 Stichting LogReport Foundation LogReport@LogReport.org
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
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Lire 2.1.1 2006-07-23 LR_ENVIRONMENT.IN(1)