Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!umich!dgsi!bud
From: bud@cimage.com (Bud Howard/1000000)
Newsgroups: comp.windows.ms
Subject: Re: Zero byte DOS files
Message-ID: <1990Aug27.163336.17116@cimage.com>
Date: 27 Aug 90 16:33:36 GMT
References: <23366@sequoia.execu.com> <3130034@hplsla.HP.COM>
Reply-To: bud@dgsi.UUCP (Bud Howard/1000000)
Organization: Cimage Corp, Ann Arbor, MI
Lines: 21

I guess few people know dos well enough!  It is _VERY_ simple.

	REM First check to see if the file is missing and write to errfile.
	if not exist goodfile.txt echo Goodfile.txt is missing! >>errfile
	REM Copy the original to a new name (be sure that all names are unique.)
	copy errfile errfile2 >NUL
	REM Because DOS will not copy a zero length file, if it is a zero
	REM length file the second one will be missing and we can delete
	REM the first one.
	if not exist errfile2 erase errfile
	REM This is just a cleanup line so not to have duplicate files.
	if exist errfile2 erase errfile2
	REM Here is where the errfile would be displayed to the screen.
	if exist errfile type errfile |more

This is very simple and quick.  


bud

P.S.		THINK DOS!