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From: davidr@hplsla.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Opening files for shared read in Turbo Pascal
Message-ID: <5280003@hplsla.HP.COM>
Date: Sun, 22-Mar-87 04:06:17 EST
Article-I.D.: hplsla.5280003
Posted: Sun Mar 22 04:06:17 1987
Date-Received: Wed, 25-Mar-87 00:35:40 EST
References: <2793@ecsvax.UUCP>
Organization: HP Lake Stevens
Lines: 16


I am not an  authority,  but will share my  impression of what Turbo is doing,
and what I do to make this work.  It appears from my experience  that Turbo is
using the earlier DOS read function  calls  (possibly for  compatibility  with
earlier  versions of DOS), and therefore you will have problems with the Turbo
routines  for Reset and Open.  I created  a program a while ago to make a copy
of one disc to another (including ALL files and directories, including Hidden,
Read-only and System files and  directories,  excluding the DOS boot files) so
that I could  quickly and easily  copy one 20 MByte hard disc to another  Hard
disc of a different  size.  I used the newer DOS function call 3D (and related
3x function  calls), which allowed me to read files  regardless of  attribute.
You can actually  specify how you want the file opened  (exclusively,  shared,
etc.),  and  whether  the file must be a  "normal"  file, or can have  special
attributes.  Of course, all of this means having to write your own  procedures
to access DOS (though this is really quite  simple).  I hope this point you in
a direction to accomplish your needs.