Re putenv(). getenv

[Richard Kreiss]

> -----Original Message-----
> From: Filepro-list [mailto:filepro-list-
> bounces+rkreiss=verizon.net at lists.celestial.com] On Behalf Of Kenneth
> Brody
> Sent: Monday, January 12, 2015 11:55 AM
> To: Richard Kreiss; filepro-list at lists.celestial.com
> Subject: Re: Re putenv(). getenv
> 
> On 1/12/2015 11:38 AM, Richard Kreiss wrote:
> > I have a -v select process which counts the number of records selected.
> >
> > When @done executed:
> [...]
> >         Then: putenv "RecordCount",rs
> [...]
> > The first message box shows the records count/ The next msgbox reads
> > back the environmental variable created and shows the same amount.
> >
> > I need to pass the parameter to another process which is running from
the
> batch file.
> [...]
> > dreport transaction -f sort_sequence -v sel_sequence -a -y !! -ik -o0
> > -u set RecordCount
> [...]
> > As Ken has often stated, the environmental variable can only be passed
> > if  it is with the same working environment. i.e. filePro's variables
> > set in startup file.
> >
> > When the sel_sequence ends and returns to the batch file which then
> > executes set RecordCount, I get the error message:
> > C:\DATABASES\CCP>set RecordCount
> > Environment variable RecordCount not defined Press any key to continue
> > . . .
> >
> > Why if prior to exiting, RecordCount exists as a variable which is
> > set, should it disappear as a set variable at the command line?
> 
> The key words are "prior to exiting".
> 
> I believe you misunderstood what I have said about environment variables.
> You can only affect the current process, and it's *children* (and only
those
> children created after the change is made), not "the same working
> environment".
> 
> When you run dreport, any changes it makes to its environment are *not*
> passed back up to its parent process.  When dreport exits, its environment
is
> discarded along with any other resources it was using.
> 
> Think of this in terms of genetics.  Suppose you undergo some gene therapy
> which makes you hair purple -- PUTENV("HAIRCOLOR","purple").  Your
> parents'
> hair is not affected.  Nor is the hair of any existing children.  Only
your hair,
> and the hair of children conceived after the change was made, will be
> affected.

I needed to add a control file for use in another process which would use
the records involved.  

I added fields to this fiel to handle the values Involved.

My original programming had the -v and output process together.  The output
processing got very complicated so I moved it to a library function reading
the records from the demand index created by the processing using the -v
process.  This made it much simpler to handle each record.

I probably would have had similar results if I had used @wsbrk but I didn't
and my programming is working properly.

Thanks for clearing that up.

Richard