Fwd: environment variable handling under UNIX

[EDISR@dteenergy.com]

Date: 06 Aug 98 13:47:04
From:"Robert Edis" <EDISR.DECO.COM>
To:ph_list
Subject:environment variable handling under UNIX
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G'day all 
 
We are converting are PowerHouse 6.10e1/VMS/Rdb system to PowerHouse 
7.33/UNIX/Oracle 7.3.4.  We currently use the GETSYSTEMVAL and SETSYSTEMVAL
in 
many areas of our code and worked out long ago that to be reliable the value=
 
had to be a VMS Logical in at least the LNM$JOB table.  Now we are moving to=
 
UNIX we have found that using an environment variable does not always work. 
A 
child process can 'see' a variable created by its parent but not the other
way 
around.   
 
Here are some examples of how we use logicals in VMS: 
 
1.  
QUICK screen calls a DCL script 
DCL script runs a 3GL program that returns a result (exit(n)) 
DCL script creates a JOB logical based on result and exits back to the QUICK=
 
screen 
QUICK screen then does a GETSYSTEMVAL to read the logical value. 
 
2. 
QTP request reads an input parameter and assigns value to a logical using 
SETSYSTEMVAL 
Subsequent requests (and maybe QUIZ reports too) use CHOOSE SYSTEMVAL ....
to 
read the logical. 
 
Now the question: does anybody out there know how we can successfully 
reproduce this in a HP/UX environment where LOGICALs don't exist? 
 
We have already thought of using temporary files to store the values but
this 
will require a lot of rewriting and testing of code.  
 
Your input will be much appreciated thanks 
 
 
Robert Edis (Blue) 
Technical Consultant 
Michigan, USA 
(VAX/VMS, ORACLE Rdb, PowerHouse 4GL)
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