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Full Discussion: Using Environment Variable
Top Forums Shell Programming and Scripting Using Environment Variable Post 302072192 by kaiser on Friday 28th of April 2006 03:20:07 PM
Old 04-28-2006
Using Environment Variable
In our current environment we have each of our testing levels on individual servers (running Korn shell). So, there is a server for dev and test, and 2 servers for qa and prod. I have several scripts that utilize a code that is dependant on the server where it resides. While I was the only person using these scripts, I had that value hard coded in my scripts (they were quick and dirty scripts). Now we have several folks that will be supporting this and I want to keep the scripts in a central repository and change this value to be an environment variable.

My thought is to set this as an environment variable in the users .profile. Then the scripts will use that variable, instead of having to change it for each server/test level.

My assumption, and from everything I've read, is that if I export the variable in my profile, it should be available to scripts when executed. But, that is not what I am seeing. And these scripts are executed by the user from the command line.

Here is an example. Any help would be appreciated.

.profile:
VAR=server_a
export $VAR

script:
some_command $VAR #executes command passing in $VAR


When I do this, $VAR does not seem to contain server_a. It is empty instead. However, if I echo out $VAR at the command line, it does equal server_a.

A solution that does seem to work, is to set the variable in a .kshrc file and execute that in my script prior to using it. But I would prefer to have it set in the profile and have it available for the scripts.

Any help would be appreciated. Thanx
 

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LEARN ABOUT MOJAVE

platform::shell

platform::shell(n)					       Tcl Bundled Packages						platform::shell(n)

__________________________________________________________________________________________________________________________________________________

NAME

       platform::shell - System identification support code and utilities

SYNOPSIS

       package require platform::shell ?1.1.4?

       platform::shell::generic shell
       platform::shell::identify shell
       platform::shell::platform shell
_________________________________________________________________

DESCRIPTION

       The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell.

       This  package  allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only
       requirement is that the other shell (identified by its path), is actually executable on the current machine.

       While for most platform this means that the architecture of the interrogated shell is identical to the architecture of  the  running  shell
       this  is  not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run
       32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers.

       For applications like a code repository it is important to identify the architecture of the shell which will  actually  run  the  installed
       packages, versus the architecture of the shell running the repository software.

COMMANDS

       platform::shell::identify shell
	      This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::generic shell
	      This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::platform shell
	      This command returns the contents of tcl_platform(platform) for the specified Tcl shell.

KEYWORDS

       operating system, cpu architecture, platform, architecture

platform::shell 						       1.1.4							platform::shell(n)
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