# The Wiert Corner – irregular stream of stuff

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# Archive for the ‘Batch-Files’ Category

## defrag.exe: tracking an already in progress operation can be done from non-admin session

Posted by jpluimers on 2017/03/17

When you want to defrag.exe (the built-in Windows one, not the SysInternals Windows NT4 one, so make sure SysInternals comes last in your path) a volume, you have to run it with an elevated UAC Admin token.

But I just found out that you can do this without an Admin token:

C:\Windows\System32>Defrag.exe C: /t /v /u
Microsoft Drive Optimizer

Tracking operation on (C:)...

Performing pass 2:
Free Space Consolidation:  31% complete...

This makes it much easier to separate monitoring scripting from execution.

–jeroen

## Windows 10 – language neutral batch file to start Windows

Posted by jpluimers on 2017/02/22

A while ago, I bitched that Microsoft moved away the Windows Update out of the Control panel into a language depended place (in Windows 10 1511 update broke the Hyper-V networking – Fix network connection issues).

Since then I had to maintain too many locales running Windows 10. So here is the batch file:

for /f "delims=" %%A in ('PowerShell -Command "(Get-Culture).Name"') do explorer "%LocalAppData%\Packages\windows.immersivecontrolpanel_cw5n1h2txyewy\LocalState\Indexed\Settings\%%A\AAA_SystemSettings_MusUpdate_UpdateActionButton.settingcontent-ms"

It uses these tricks:

1. Set output of a command as a variable (in this case a for loop variable)
2. Execute PowerShell script in a .bat file
3. PowerShell Get-Culture (which gets a .NET CultureInfo instance)
4. CultureInfo.Name property (which has the nl-NL, en-US, etc codes in it)

It replaced this simple batch-file which has worked for like 10 years:

%windir%\System32\rundll32.exe url.dll,FileProtocolHandler wuapp.exe

–jeroen

## Windows batch file – setting space as delimiter when parsing files

Posted by jpluimers on 2017/01/04

for /f "tokens=* delims= " %%f in (myfile) do

If you put delims as the last parameter, then an ending space will be included as delimiter (at the start or in the middle it won’t).

A great tip by jeb and Joey in an answer for windows – Batch file FOR /f tokens – Stack Overflow

–jeroen

## Coping with UTF-16 / UCS-2 little endian in Batch files: numbers from WMIC

Posted by jpluimers on 2016/11/22

A while ago, I needed to get the various date, time and week values from WMIC to environment variables with pre-padded zeros. I thought: easy job, just write a batch file.

Tough luck: I couldn’t get the values to expand properly. Which in the end was caused by WMIC emitting UTF-16 and the command-interpreter not expecting double-byte character sets which messed up my original batch file.

What I wanted What I got
wmic_Day=21
wmic_DayOfWeek=04
wmic_Hour=15
wmic_Milliseconds=00
wmic_Minute=02
wmic_Month=05
wmic_Quarter=02
wmic_Second=22
wmic_WeekInMonth=04
wmic_Year=2015

Day=21
wmic_DayOfWeek=4
wmic_Hour=15
wmic_Milliseconds=
wmic_Minute=4
wmic_Month=5
wmic_Quarter=2
wmic_Second=22
wmic_WeekInMonth=4
wmic_Year=2015


WMIC uses this encoding because the Wide versions of Windows API calls use UTF-16 (sometimes called UCS-2 as that is where UTF-16 evolved from).

As Windows uses little-endian encoding by default, the high byte (which is zero) of a UTF-16 code point with ASCII characters comes first. That messes up the command interpreter.

Lucikly rojo was of great help solving this.

His solution is centered around set /A, which:

• handles integer numbers and calls them “numeric” (hinting floating point, but those are truncated to integer; one of the tricks rojo uses)
• and (be careful with this as 08 and 09 are not octal numbers) uses these prefixes:
• 0 for Octal

Read the rest of this entry »

## permissions – recursively change owner windows 7 – Super User

Posted by jpluimers on 2016/10/27

Slightly updated the answer the /D Y part will recursively accept taking ownership when directory listing is denied in the permissions:

To fix really broken permissions, the best is to run these two commands one after the other:

takeown /F /D Y "C:\path\to\folder" /R
icacls "C:\path\to\folder" /reset /T

The first one will give you ownership of all the files, however that might not be enough, for example if all the files have the read/write/exec permissions set to “deny”. You own the files but still cannot do anything with them.

In that case, run the second command, which will fix the broken permissions.

–jeroen