Reggie:

First, rename the program "A"  in question to another abstract program 
name "newA".

Write a new program "A" that will first add a password (maybe the pw 
could be the username) to "newA" then create a process that would 
execute "newA/pw".  When the program completes, remove the password from 
"newA".  When the session / job / udc ends, remove the password if it 
still has one.

Another option.  Programmically change the name of the program "A" to 
another name that contains a ramdomized control character.  then create 
and active a process to execute this newly renamed program.  When 
finished, rename it back.  What this does, is to make sure no other 
program knows what the name of the new program is, and therefore 
ensuring only one version is running at a time.   If the program aborts, 
it might be difficult to determine what the actual name of the renamed 
program actually is.  Using priv mode, any errors could be trapped and 
the renaming back to the origional is possible.

Another option.  Write two programs.  The first renames the program "A" 
to a name with an embedded control character.  The other program renames 
it back.
Now on to how this would work.   When you do not want direct user 
execution, run the first program.  Now all further programs will require 
a program which creates / activtes and then executes the required 
program.  Use resource locking to prevent two users from accessing the 
same executable.  Use the second program to restore the program name to 
that of its origional.

I might have a few other ideas; let me know.

Olav Kappert
IOMIT International
HP3000 Application Development Specialist.
http://IOMIT.UnitedStates.com

Reggie Monroe wrote:

>Is there a way to restrict the number of users that can access a specific program. For example I would like to have only one person at a time running the Orbit software in order to prevent multiple people performing online backups. Thank you.
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