RK
ObBitRec: "The Last Best Thing" a sillyvalley biz novel that sounds A-1 --
by an old hand at the San Jose Murky
---------------------------
October 21, 1996
Make printouts of your listings with Microsoft's secret operating system
I had a lot of information in this column a few weeks ago on searching for
duplicate files. I'm not going to repeat that discussion here, except to
say that if you have .DLL files on your system that have the same name but
are different versions, your applications may crash without warning. (There
are so many exceptions to this rule that you really must get the original
columns if you are interested. Point your browser to InfoWorld Electric,
http://www.infoworld.com/cgi-bin /displayNew.pl?/livingst/bllist.htm, or
call Customer Service at [847] 647-7925.)
Meanwhile, reader Doug McGarrett has brought up an interesting but
unrelated problem. He used Windows 95's Find command to search for .DLL
files. This works great, until you realize that you have a list with
hundreds of files (there are more than 1,000 .DLL files on my C: drive
alone), and there is no way to print or save the list from the Find window.
Going back to the Windows 3.1 File Manager doesn't help. Although many
Windows 3.1 tools are actually more powerful than their Win95 counterparts
(Paintbrush vs. Win95's pathetic Microsoft Paint, for example), we aren't
so lucky in this situation. File Manager's Search window doesn't have a way
to print or save a list, either.
There is a work-around, however. You can easily print or save a list of any
set of files, sorted in almost any manner you like. All you need to know is
a bit of information on a secret OS hidden within Windows itself. This
small but exceptionally fast OS is a well-kept secret. Unlike most
undocumented features of Windows -- which Microsoft merely neglects to talk
about -- this feature is one that Microsoft actively denies even exists.
This secret operating system is, of course, DOS. We had a bit of fun when
Windows 95 came out with all the claims that "there's no DOS under Windows
anymore." Well, of course, DOS is still there. You boot your Win95 computer
in DOS' real mode; DOS continues to run under Windows; and Windows still
uses its services every time Windows opens a file and the like.
It is DOS alone (not Windows) that has the capability, amazingly, to save
and print lists of files on your drives. Only DOS (not Windows) can rename
a group of many files simultaneously. And only DOS (unlike Windows 95) can
actually copy a giant clump of files from one location to another without
making you stare at a moronic cartoon of papers sprouting wings and flying
to their final resting place.
Let's take the .DLL printout problem first. You can easily output a list of
files with the DOS command ATTRIB. This command lists the name of every
file that matches your specifications, plus a letter showing whether each
file has attributes such as Read-Only, Hidden, System, or Archive. (The
Archive bit allows backup programs, other than Win95's Backup, to save only
those files that have changed since your last backup.)
To create a sorted list of .DLL files and save the list to a text file,
start a DOS session and type the following:
attrib c:\*.dll\s|sort/+14>c:\dll_list.txt
Once you have this text file, you can look at it in Notepad or any word
processor. This allows you to look for duplicate file names at your
leisure. The output of ATTRIB shows both the file name and its path
location. If you don't need to save the list but just want to print it out,
replace the file name at the end of the command with any text printer port,
such as >lpt1 or >com1.
As for renaming files, to rename .DOC files to .BAK files, type the
following:
rename c:\dir\*.doc c:\dir\*.bak
More information on any of these commands is available by typing the
command name followed by a /? at a DOS prompt.
It always amazes me that functions such as these aren't available in
Windows. Maybe Microsoft will build a complete set of DOS capabilities in
to Explorer some day.