Re: more environment variable questions

[Scott Klement <midrange-l@xxxxxxxxxxxxxxxx>]

The *SYS level environment variables are (more or less) default values 
for the job-level ones.   In general, software never looks at the system 
level ones.  (I'm generalizing -- it's certainly POSSIBLE for software 
to look at the system-level ones, but it's not the normal way of doing 
things.)  Programs normally only read the job-level variables.

The first time that a program accesses a job-level environment variable, 
all of the system-level ones are copied into that job.   In this way, 
you can say that a job's environment variables start out with the values 
defined at the system-level.   Or, as I prefer to think of it: 
system-level variables are the "default values", and job-level ones are 
the actual variables used by software...

When you submit a job with CPYENVVAR(*YES), it tells the SBMJOB command 
that the newly created job SHOULD NOT get it's defaults from the 
system-level variables.  Instead, it should get it's defaults from the 
job that's running the SBMJOB command.   So the job-level variables are 
copied from one job to another.   If you specify CPYENVVAR(*NO), then 
they are copied from the system-level ones as usual.

So if there's a system-level variable and you don't want it used, you 
have to follow these steps:

    a) Use RMVENVVAR to remove it from the current job.

    b) Submit with CPYENVVAR(*YES)

Specifying CPYENVVAR(*YES) prevents the new job from being initialized 
from teh system-level ones.  Instead, it's initialized from the 
submitting job's variables -- and since the envvar was removed from the 
submitting job, it won't existed in the submitted one either.



Urbanek, Marty wrote:
> If someone has defined an environment variable at *SYS level:
>
> ADDENVVAR ENVVAR(foo) VALUE(bar) LEVEL(*SYS)
>
> How can I eliminate this from having an effect in my job? I want my job
> to run as if this variable was never defined.
>
> Would I have to explicitly include code in my job, such as:
>
> RMVENVVAR ENVVAR(foo) LEVEL(*JOB)
>
> ?
>
> If I specify CPYENVVAR(*NO) on SBMJOB, would this do the trick? The
> description doesn't lead me to believe so. I'm not so concerned about
> copying env vars from the submitting job as wanting to ignore the *SYS
> level env vars that are in place.
>
> THANKS,
> -Marty