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Top Forums Shell Programming and Scripting Passing variables between scripts Post 302157530 by bbergstrom74 on Friday 11th of January 2008 06:29:15 AM
Old 01-11-2008
Passing variables between scripts

Hi all.

I need to pass a value from a script that runs in a sub-shell, back into the calling shell like below (or into script 2 directly):

outer_script
export param=value1

script1 $param
(in script1: export param=value2)

script2 $param
($param is now value1, not value2 like i'd prefer)
end outer_script

I can't get this to work using regular variables and I have read some about shells and sub-shells and variables and I now believe that it's not possible with variables.

I guess I could always use a file to store the value in script1 and then read it in script2 using the file. But if I go this way I'd be forced to have separate files for each user that executes the script so that no conflicts occurr. But then I'd get a lot of files that mess up. I guess I could then remove each file after the script completes but what if the user terminates using Ctrl+C? I'd still have a lot of messy files after a while.

At the moment I'm leaning towards using files, but I thought I'd ask if someone knows another/better way to do this without using files?

This is in Korn Shell
 

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SHUNIT2(1)																SHUNIT2(1)

NAME
shunit2 - A unit test framework for shell scripts SYNOPSIS
shunit2 unitfile DESCRIPTION
shUnit2 is a xUnit unit test framework for Bourne based shell scripts, and it is designed to work in a similar manner to JUnit, PyUnit, etc.. If you have ever had the desire to write a unit test for a shell script, shUnit2 can do the job. You can either run shunit2 directly from the commandline and specify the unit file or directly source the shunit2 executable. If you directly execute shunit2 and don't specify a unitfile shunit2 assumes a empty testfile and will return without an error message. EXAMPLE
Simple script to test if 1 equals 1 #! /bin/sh testEquality() { assertEquals 1 1 } # load shunit2 . shunit2 Execute shUnit2 unit tests directly from the commandline shunit2 /path/to/unit/file OPTIONS
shunit2 does not support any commandline options at all. You can either source shunit2 to execute your unit tests or directly run shunit2 as a commandline script. SEE ALSO
For more information see http://code.google.com/p/shunit2/ or have a look at the installed documentation in /usr/share/doc/shunit2/ AUTHOR
shunit2 was written by Kate Ward <kate.ward@forestent.com>. This manpage was written by Ulrich Dangel <mru@spamt.net>. 2.1.6 03/25/2012 SHUNIT2(1)
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