Hello, I am new to the forums and thanks everyone for your help.

I am having trouble creating a SIMPLE batch file that has to look over the root directory for a file that is located into the removable media, and if found, rename that file.

To be more PRECISE, I have a freeware Antivirus for removable drives named Mx One. The trouble right here, is that I was creating an Auto-Update option with Autorun, that executes the program, and then having the choice for the user to update it for himself whenever he inserts his USB. But my trouble right ahead, is that when the Update function of Mx One Antivirus launches, it deletes the previous sequential file, and continues the sequence and creating a new file.

For example I open: Mx one 0001.exe I update, so Mx one 0001.exe no longer exists, and Mx one 0002.exe is created instead ONLY if update is selected.


I want to execute a batch file that looks for the next sequential file, (something repeated in a FOR loop) ending at a MAXIMUM integer or until found, having something like this:

for index=1 index<99(or until found)
IF EXIST filename+index

rename filename > newfilename

EXIT


Thanks for your help.

From my limited knowledge of batching there is no incremental function. So USING an index is tricky. However you can run the for loop to loop for all of a certain file type in a folder. For example:

Code: [Select]for %%I in (*.sql) do {} (
will search through the directory for all .sql files and do whatever is encapsulated in the do { }

A work around I found for INCREMENTING if you need a numeric value is putting this at the end of the loop:

Code: [Select]echo 1 >> i.txt
This will make a i.txt file with a series of 1's for each time the loop reaches the end. Use this in tandum with:

Code: [Select]find /c "1" i.txt > i2.txt
This will result in the number of 1's in i.txt and print it to i2.txt (I haven't attempted to put the value in a variable but I don't see why it wouldn't work) but there is your number that has been incremented.

Hope this is somewhat helpful.
Here is how to increment in batch:

for /l %%a in ('1,1,100') do echo %%a

I think...LolQuote from: Helpmeh on December 30, 2009, 01:27:17 PM

Here is how to increment in batch:

for /l %%a in ('1,1,100') do echo %%a

I think...Lol

Making a good batch file can be a lot of fun. But a person is better motivated to do a good job if they have a good reason.

Looking over your original post, I don't see a very good reason for doing this. Pardon me, but that freeware program you're referring to works very well just the way it is. So I don't get the point. You already know that it's going to give itself another name and delete the prior version. So what's wrong with that?
But, if you insist, it's quite easy to find a file that has a certain name or has some ambiguity in the name. Now the question would be; Suppose to found 100 files that have ambiguous names. Do you want to delete them all? You want to rename the mall? Or just rename the last one and delete all the others?
You objective is either not clear or in unreasonable. Remember, Reason must precede logic.

Something along those lines.

I was exploring a solution for this thread with that particular construct but realized that it would be more difficult than that: the numbers would need to have an appropriate number of zero's prepended. the bleeding obvious VB equivalent,
Code: [Select]strnewname= "mx one " & String(4 - Len(Trim(Str(Number))), "0") + Trim(Number) & ".exe" doesn't work in batch.

Oh... heh, I could always write a little script, I suppose; I'm not certain what the desired result is; that is, what "newfilename" is to be (?)

If I understand correctly, your filenames are in the form:

"Mx One 0001.exe" with different 4 character numbers on the end or what have you.

you can rename them ALL at once! I just remembered our good friend, the ? wildcard:

Code: [Select]ren "?? ??? ????.exe" "??_???_????.exe"

of course, if for some reason you have other exe files with 2 characters, a space, three characters, a space, and four characters, it will rename these, as well. But that seems unlikely.

Here is how to increment in batch:

for /l %%a in ('1,1,100') do echo %%a

I think...Lol