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DFLREAD.ME
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1989-11-27
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DUPLICATE FILE LOCATOR PROGRAM Version 1.01
This group of files is the latest version of a full-featured
copy of DFL - the Duplicate File Locator Program. The compressed
file DFL.ZIP should contain the following files:
DFL.EXE the executable program with self-contained help
ORDER.DOC the program registration order form
DFLREAD.ME this file
DFL will search even a huge disk to find the duplicate files. I
wrote this program because the programs I had found and tested on
the various BBSs either had bugs, or used so much memory per file
or directory in searching the disk that they aborted due to a lack
of memory. One of the bugs I found in another duplicate seeker
appears to be a failure to close files during the compare and
deletion process. After some number of deletions, all of the DOS
file handles or File Control Blocks are used, and the program
refuses to process any more.
DFL, as of 11/27/89, has no reported bugs - especially the ones I
wrote DFL to get around. In addition, the internal data structures
used to capture the contents of the disk are as small as can
reasonably be expected. When used on my 330 Megabyte Miniscribe
ESDI drive, with approximately 3200 files in 150 directories, only
200 Kbytes of RAM are used. Based on this, DFL should be able to
handle approximately 12,000 files before memory becomes full.
The main feature of DFL which I have not found in any other similar
program is its ALIAS mode of operation. Using this mode, the
contents of files are compared to identify duplicates. The file
names play no role whatsoever. For example, this will allow the
user to locate source files such as PROGRAM.C and PROGRAM.BAK
which have the same contents but different names. This may also
be of use to sysops who want to weed out duplicate uploads which
have different names.
WHAT IS NEXT FOR DFL?
Version 2 of DFL will do all of the above, and will also search the
contents of ZIP, PAK, LZH and ARC files to find duplicates. This
will help sysops smoke out duplicates contained in compressed files
with different names. Usually, the .COM and .EXE files are the
same in such situations, but some trivial change has be made to a
.DOC or .TXT file so that the size of the diddled file is slightly
different than the original compressed file. We will all benefit
if the boards are not cluttered with duplicates.
HOW TO REACH ME
Anyone with comments, suggestions, complaints or bug-reports can
reach me in one of four ways:
Write: W. S. Ataras Engineering
40 Laughton Street
Upper Marlboro, Md. 20772
Voice mail: 1-301-249-1141
BBS: Springfield Bypass
1-301-941-5815 (2400-N81)
FAX: 1-301-627-7510
Be sure to include my voice mail number on
the FAX cover sheet.
I remain yours truly,
W. S. Ataras, PE
11/28/89