Path: utzoo!mnetor!uunet!husc6!think!ames!pasteur!ucbvax!CPSWH.CPS.MSU.EDU!rang%cps45x
From: rang%cps45x@CPSWH.CPS.MSU.EDU (Anton Rang)
Newsgroups: comp.os.vms
Subject: question on chaining images
Message-ID: <8803140242.AA04755@cps45x>
Date: 14 Mar 88 02:42:13 GMT
References: <8803130902.AA21589@cpswh.cps.msu.edu.cps.msu.EDU>
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  The LIB$DO_COMMAND run-time library routine will let you pass a
command to DCL to be executed.  It won't do what you want, though,
because it causes your (user mode) program to exit first (control flow
will not return to the first image).
  There is an undocumented system service--I forget its name, but it
was in the STARLET file a while ago anyway--which maps another image
into virtual memory.  I've seen one or two programs which use it, but
never done anything with it myself.  This would probably work (though
image initialization etc. might be screwed up).
  As a last resort, look in the fiche at DCL to see how it does it.
Of course, it's running in supervisor mode, but...

					Anton Rang
					Graduate student, Michigan State
					All opinions & mistakes are my own.