DOS Batch

[ionic]

I'd like to do 2 things with this batch file:

1) either rename a specific to a random name (example: qpwo.xyz)
    if this can not be done then to a specific name. xxxx.xxx
then:

2) delete the file.

In the end I'd like to drag-n-drop a file abc.def onto a shortcut and have it rename
abc.def to qlsybc.fhw and then delete qlsybc.fhw.

any help would be appreciated.

[gpl]

Your first part could be solved by

ren %1 %RANDOM%.%RANDOM%

now, why on earth do you want to rename a file, then delete it ? why not just delete it in the first place ?

Graham

[patio]

My guess would be it's a file he doesn't have full permission to delete...

But i've been wrong before.

[ionic]

Why on earth would I want to rename a file then delete it. Fir example if I had a file called finance.xml and I deleted it to the recycle bin it would still be recoverable, and it could have obvious value to someone trying to hijack personal information. But if I rename it to something meaningless then delete it. those snoops would look elsewhere for important documents.

Nope, not trying to delete anything I do not or should not have access to.

[ionic]

Using the following code I get:

Code: [Select]

ren %1 %RANDOM%.%RANDOM%
sdelete -p 12 -s %1
exit
The fie was renamed to some random file name but this file remained on the system while the original file was deleted,

[gpl]

In that case, you need to store the new filename first

Code: [Select]

Set newname=%RANDOM%.%RANDOM%
ren %1 %newname%
sdelete -p 12 -s %newname%
exit
I like your thinking, however, unless you have a third-party app installed, when you delete using the batch Del command, they do not appear in the recycle bin, they are gone - which has caused me some grief over the years !!

Graham

[CameronY]

Guys, just reading through the tread ...

What is `sdelete` and from what tool box can it sought from ??

Cheers,
Cameron

[ionic]

CameronY,

SDelete.exe is command line file that is capable of secure fle deletion. The company that offered it, Sysinternals, no longer exist as it was bought out by microsoft. The only link I can find for downloading it is here:

http://technet.microsoft.com/en-us/sysinternals/bb897443.aspx

Other usefull info I just found on it can be found here:

http://forum.sysinternals.com/forum_posts.asp?TID=6065&PN=1


gpl,

Thanks for the simple, but crucial code. The code you provided I will be setting up in the right-click contex menu for single file deletion.  In terms of batch mode I'd have to know and list every file that I would want to delete in a batch file, which gets quite complicated.

--------------------------------------------------------------

after running the new batch file I received the following error:

SDelete is set for 12 passes. - (Not a problem)
No files found that match 29517.1883. - (Clueless here!)

In other words the random rename works.
the file 29517.1883 does exist in the same location as the original file
but sdelete did not delete the file.

Could it be that the sdelete operation is trying to delete before the file has been renamed?
Not sure....

-----------------------------------------------------------------

Nope, not a timing issue. Maybe sdelete.exe is not recognizing the variable, 'newname'.
Nothing ever comes easy dose it?

[ionic]

There is something fundamentally wrong with this code.

Code: [Select]

@echo off
ren %1 %RANDOM%.%RANDOM%
DEL %1
exit
The renamed file can not be Deleted using Sdelete.exe, DEL, ERASE
The file renaming works fine, but the del, erase...etc. does nothing

Any ideas why?

[Sidewinder]

You're trying to delete the file that you just renamed! The earlier post by GPL had it right:

Code: [Select]

@echo off
Set newname=%RANDOM%.%RANDOM%
ren %1 %newname%
DEL %newname%
exit

A suggestion: leave echo on while debugging. It will give you some insight into how your file is executing.

 

[ionic]

OK,
Here is the code I used:

Code: [Select]

Set newname=%RANDOM%.%RANDOM%
ren %1 %newname%
DEL %newname%
pause
exit
...and here is reply I received:

C:\donume~1\User\>Set newname=15624.19141
C:\donume~1\User\>ren "C:\donume~1\User\desktop\test.txt" 15624.19141
C:\donume~1\User\>DEL 15624.19141
Could Not Find C:\donume~1\User\>15624.19141

Conclusion: If the file "test.txt" and the batch file are located on the User desktop, why does DOS
lose this positioning and look to delete the file in a directory above the originating directory?
The renamed file does indeed replace the test.txt file in the same location, on the desktop.

Do I need to set the initial DIR... cd %1 or something to that effect?? Disregaard, this tries sets the dir
as test.txt.

 

[Sidewinder]

why does DOS
lose this positioning and look to delete the file in a directory above the originating directory

You were never in the desktop directory, you only pointed to it. The command window defaults to %homedrive%%homepath% when opened unless overridden. That would be C:\donume~1\User\ in your case. The set statement ran because it contains no path pointers. The ren statement ran because the %1 parameter included a fully qualified file name. You were in one directory but pointed the command parameters to another where it found the file and renamed it. The del failed because the file is not in C:\donume~1\User\ but in C:\donume~1\User\desktop\ and there are is no path pointer to the file in which case the current directory applies: C:\donume~1\User\

Code: [Select]

cd C:\donume~1\User\desktop
Set newname=%RANDOM%.%RANDOM%
ren %1 %newname%
DEL %newname%
pause
exit

The example above logs on to the correct directory. An added benefit is that you need only pass test.txt on the command line.

It's a lot easier if you run batch files from the command line rather than Windows.

[ionic]

If the SET command knows the full path to the file being deleted and
the REN command knows the full path, why does the DEL command fail to
recognize the full path to the file.

The new code changes nothing really.  One would have to redirect the directory
manually every time you ran the bat file from a different location. Thus if I were to
drag a file to be deleted onto a shortcut to the bat file, how can it automatically lock in
the target path for all action to take place...regardless of where the source file is located?


However since I was intending to use sdelete.exe as the final command instead of DEL
I just found out that deleting with sdelete renames the shredded file as ZZZZ.ZZZ in place
of test.txt.

This is the current code using sdelete.exe

Code: [Select]

@echo off

:: The (%*) allows for multiple directories and files to be deleted recursivly.

FOR %%F IN (%*) DO ECHO Y| cacls %%F /T /C /G Administrators:F
:Set proper attributes for directories
FOR %%F IN (%*) DO attrib -h -s -r -a %%F /S /D
:Set proper attributes for files
FOR %%F IN (%*) DO attrib -h -s -r -a %1\*.* /S /D
FOR %%F IN (%*) DO sdelete -p 12 -s -q %%F
I still would like to understand how to correct this in a bat file can accomplish this.

[Sidewinder]

One would have to redirect the directory manually every time you ran the bat file from a different location

Yes indeed, unless the code was generic (see below)

If the SET command knows the full path to the file being deleted

Set newname=15624.19141
It doesn't; it sets a variable to a string; might be a file name; definitely not an included path

the REN command knows the full path

ren "C:\donume~1\User\desktop\test.txt" 15624.19141
The %1 referenced in the ren command parameters included a path pointer

why does the DEL command fail to recognize the full path to the file.

DEL 15624.19141
%1 is not referenced in the del command parameters

This is generic enough based on your latest request:

Code: [Select]

Set newname=%RANDOM%.%RANDOM%
ren %1 %newname%
DEL %~d1%~p1%newname%
pause
exit

Concerning your latest edit:

Code: [Select]

@echo off

:: The (%*) allows for multiple directories and files to be deleted recursivly.

FOR %%F IN (%*) DO ECHO Y| cacls %%F /T /C /G Administrators:F
:Set proper attributes for directories
FOR %%F IN (%*) DO attrib -h -s -r -a %%F /S /D
:Set proper attributes for files
FOR %%F IN (%*) DO attrib -h -s -r -a %1\*.* /S /D
FOR %%F IN (%*) DO sdelete -p 12 -s -q %%F


I still would like to understand how to correct this in a bat file can accomplish this

Does not the above code work? Could you re-phrase your question?

[ionic]

Concerning your latest edit:

Code:

@echo off

:: The (%*) allows for multiple directories and files to be deleted recursivly.

FOR %%F IN (%*) DO ECHO Y| cacls %%F /T /C /G Administrators:F
:Set proper attributes for directories
FOR %%F IN (%*) DO attrib -h -s -r -a %%F /S /D
:Set proper attributes for files
FOR %%F IN (%*) DO attrib -h -s -r -a %1\*.* /S /D
FOR %%F IN (%*) DO sdelete -p 12 -s -q %%F



I still would like to understand how to correct this in a bat file can accomplish this.

Does not the above code work? Could you re-phrase your question?

I worded that wrong, my apologies. The above "sdelete" code does work. It was the previous code
that did not work for which you explained and wrote new code seen below:

Code: [Select]

Set newname=%RANDOM%.%RANDOM%
ren %1 %newname%
DEL %~d1%~p1%newname%
pause
exit
After reading your explanation and seeing the new code I had complete confidence that it too would work
just fine, but it did not. When I sent the test.txt to the shortcut to the new code this is what I got in return.

c:\docume~1\user>Set newname=725.23907
c:\docume~1\user>ren "C:\docume~!\user\desktop\test.txt 725.23907
c:\docume~1\user>DEL C:\docume~1\user\desktop\725.23907
The system cannot find the file specified.

The DEL command seems to have found the right path this tim with the addition of the

Code: [Select]

%~d1%~p1, but an error was still geteratted stating that it could not be found.

Now this is getting really strange! I do appreciate the time you've taken to explain this to me.