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Full Discussion: Passing variables between scripts
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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LEARN ABOUT DEBIAN

torrus_action_printemail

TORRUS_ACTION_PRINTEMAIL(7)					      torrus					       TORRUS_ACTION_PRINTEMAIL(7)

NAME

       action_printemail - A script for sending email from monitor action.

SYNOPSIS

	<action name="report-email">
	  <param name="action-type" value="exec" />
	  <param name="command">
	    $TORRUS_BIN/action_printemail | mail alarms@example.com
	  </param>
	  <param name="launch-when" value="set, clear" />
	</action>

DESCRIPTION

       This program is designed for usage from a monitor action only. It takes the arguments from environment variables, as described in action-
       type "exec" in Torrus XML Configuration Guide. In addition, some values may be supplied via command-line arguments (see section OPTIONS
       below).

       Site-specific variables must be specified in the file email-siteconfig.pl.  Default values are installed by the first run of "make
       install". Subsequent runs of "make install" do not override this file.

OPTIONS

       --url=GRAPHER-URL
	   Sets the URL of the grapher CGI script.

       --template=TEMPLATE-FILE
	   Uses given file as a template. The template file must reside in /usr/share/torrus/templates directory. It must be a Template-toolkit
	   file, with the following variables defined:

	    tree       Tree name
	    token      Leaf token
	    path       Leaf path
	    url        URL for browsing this leaf
	    ncomment   This leaf comment
	    npcomment  Leaf's parent comment
	    event      Event type
	    monitor    Monitor name
	    mcomment   Monitor comment
	    timestamp  Time and date of the event
	    env(VAR)   Environment variable VAR

FILES

       /etc/torrus/conf/email-siteconfig.pl
	   Torrus site email configuration script.

       /usr/share/torrus/templates
       /etc/torrus/templates
	   Torrus template directories.

SEE ALSO

       torrus(8)

NOTES

       See more documentation at Torrus home page: http://torrus.org

AUTHOR

       Stanislav Sinyagin <ssinyagin@yahoo.com>

torrus 2.03							    2013-07-26					       TORRUS_ACTION_PRINTEMAIL(7)
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