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Number   :  3170
Date     :  2002-12-02
Author   :  Kan Yabumoto
Subject  :  Re: One out of date file triggers copying of whole
Size(KB) :  2



Brian:

I don't think you can do it in one breath for this problem.
But, using a batch file and testing XXCOPY's exit code with
an IF ERRORLEVEL, you should be able to do this.

The key is the behavior of XXCOPY's /L (list-only) operation
which reports either a successful operation (finding at least
one matched file in a criteria == returns 0) or an unsuccessful
one (100 --- No-files-were-found).


mybatch.bat
-----------------------------------------------
xxcopy \dir_a1\ \dir_a2\ /u/bx/L
if not errorlevel goto doit
xxcopy \dir_b1\ \dir_b2\ /u/bx/L
if not errorlevel goto doit
goto end
:doit
(do what you want here)
:end
----------------------------------------------

Note the funny characteristics of the polarity of the
test operations here. When the /U/BX/L operation find
at least one pair of files that meet the condition
that is,

/U // only the files that are common in both dirs
/BX // list only the cases where the dates are different
/L // list-only (no copying)

When at least one such a file is found, XXCOPY will return
the exit code of 0, else, return 100. So, the action will
be triggered when you find 0 in any of the series of similar
tests (I showed only two). If brand new files (the
files present in the source without their counterpart in
the second directory) are also counted in your case,
then, don't use the /U switch which explicitly eliminates
such files from being counted.

Since all you need is one such case, you may add /QF1
which will terminate at the first instances of the case
to speed up the test.

If the multiple directories you are referring to are
subdirectories within one directory, you may add /S.

Kan Yabumoto
===========================================================

At 2002-12-02 03:20, you wrote:
>At present I copy out of date files from a plurality of directories to
>backup directories - and at present I copy only those files that are out
>of date. However, whenever an out of date file is found I would like to
>copy the entire directory that contains the out of date file and not
>just the out of date file itself. So far I have been unable to achieve
>this aim and any help or suggestions would be greatly appreciated.
>
>Brian



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