Solved

DOS DIR returns just one file

Posted on 2010-08-26
8
421 Views
Last Modified: 2013-11-09
Hi I ma trying to create a little change control update using a dos batch file.

I copy a file from a remote location to a local location if it is newer than the local version.
I then want to run that program using Access.

All works fine except if there is more than 1 file that matches my mask character in the DIR command.

What I would like the DIR to do is to stop looking when it finds the first file.
I have sorted the files so that the newest is at the top

Any ideas. Here's my script. My variable %concat% currently has 2 files in it which caused the start command to obviously fail


....................................
set copycmd=/y
xcopy "Q:\Quality System Software Client\*.mdb" "C:\Selection Software\" /d


for /f "delims=" %%a in ('dir "C:\Selection Software\BW Quality*" /b /s' /o-D) do (
       call set concat=%%concat%%%%a
                        )

Start "C:\Program Files\Microsoft Office\OFFICE11 \MSACCESS.EXE" "%concat%"
............................................................

0
Comment
Question by:EWHTLC
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
  • 2
8 Comments
 
LVL 55

Accepted Solution

by:
Bill Prew earned 350 total points
ID: 33533667
This should work, it will exit the FOR loop after the first file name is assigned to concat:

set copycmd=/y
xcopy "Q:\Quality System Software Client\*.mdb" "C:\Selection Software\" /d
for /f "delims=" %%a in ('dir "C:\Selection Software\BW Quality*" /b /s' /o-D) do (
  set concat=%%a
  goto :ExitFor
)
:ExitFor
Start "C:\Program Files\Microsoft Office\OFFICE11 \MSACCESS.EXE" "%concat%"

~bp
0
 
LVL 13

Assisted Solution

by:Ben Personick (Previously QCubed)
Ben Personick (Previously QCubed) earned 150 total points
ID: 33534253
if it doesn't work, try this code instead (BP I assume you say 'should because you didn't test and are not 100%),

SET "copycmd=/y"
XCopy "Q:\Quality System Software Client\*.mdb" "C:\Selection Software\" /d
FOR /F "delims=" %%a in ('DIR "C:\Selection Software\BW Quality*" /B /S /A:-D /O:D) DO SET "concat=%%a"
START "C:\Program Files\Microsoft Office\OFFICE11 \MSACCESS.EXE" "C:\Selection Software\%concat%"

Open in new window

0
 
LVL 55

Expert Comment

by:Bill Prew
ID: 33534814
Hello Q,

For the original poster, just to clarify, there is a subtle difference between the two approaches that is important to understand.  Either should work, but since the code difference if fairly small, I wanted to point it out.

In the first solution that I posted, I stuck with the sort order you were using, and as a result we want to get just the FIRST file and process that in Access.  As a result, on the first time through the FOR loop, we save the filename to a variable, and then exit the FOR loop.

In the second solution, rather than exit the FOR loop on the first file, we actually let ALL files loop through the FOR, and since we re assign the concat variable for each file name, it will have the value of the LAST file processed by the for loop.  As a result, Q reversed the sort order so that the file you wanted is now the last file in the list, not the first.

Either approach is valid, and you'll see both approaches used.  The first approach is a bit more efficient if you have a large number of files that you loop over, since it only processes the first one.  But it does use a goto, not highly desirable in most languages, and it jumps out of a FOR loop, again not best practice but acceptable.  Unfortunately there is no other way to gracefully exit the FOR loop before it cycles through all files.  In the second approach the code is a bit simpler, but you do the SET for each file processed until you get to the last one, so that consumes a bit of extra processing.

Hope that helps you understand the options better, let us know your questions.

~bp
0
Get 15 Days FREE Full-Featured Trial

Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users

 
LVL 13
ID: 33534900
Great Summarization of the two Techniques Bill!  =)
0
 

Author Comment

by:EWHTLC
ID: 33539593
A slight tweak to the first one.
Works an absolute treat.
I will save both versions in my tips folder.
Really useful
0
 
LVL 13
ID: 33541435
Great!  Glad we could be of help!

~Q
0
 

Author Closing Comment

by:EWHTLC
ID: 33562772
Thanks guys.
Extremely useful
0
 
LVL 13
ID: 33562836
thanks vMuch for the points & the praise =)
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Recently I have been answering a lot of questions like this in IT forums that I frequent. The question posed is usually something along the lines of "We have software X installed and need to uninstall it for reason Y" or some other variant of the sa…
It is a general practice to get rid of old user profiles on a computer  in a LAN environment. As I have been working with a company in a LAN environment where users move from one place to some other place at times. This will make many user profil…
The viewer will learn how to look for a specific file type in a local or remote server directory using PHP.
Video by: Mark
This lesson goes over how to construct ordered and unordered lists and how to create hyperlinks.

690 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question