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From: defaria@hpclapd.cup.hp.com (Andy DeFaria)
Newsgroups: comp.lang.pascal
Subject: Process handling/Memory and Ctrl-C
Message-ID: <950053@hpclapd.cup.hp.com>
Date: 15 Jan 91 00:51:06 GMT
Organization: Hewlett-Packard Calif. Language Lab
Lines: 29

Why do I get the following error messages?  The following program allocates
the smallest stack possible (1024) then Exec's SORT.  I  then hit Control-C
to abort the SORT operation and fail with the following two errors:

Runtime error 202 at 0010:09B9  { 202 = Stack overflow error }
Runtime error 105 at 0000:00D8  { 105 = File not open for output }

In a similar vein:  How can I release all  memory used  by   my program  to
whatever program I Exec and still be able to  reclaim  the memory back once
the Exec'ed program is finished?  I would like to allow any program  that I
start to have access to as much  memory as is  available to avoid potential
problems.

{$M 1024, 0, 0}
Program Foo;

Uses DOS;

Begin { Foo }
   WriteLn ('Executing C:\SYSTEM\DOS\SORT.EXE');
   
   Exec ('C:\SYSTEM\DOS\SORT.EXE');

   If DOSError <> 0 then
      WriteLn ('DOSError = ', DOSError : 1)
   else
      WriteLn ('Successful');

End. { Foo }