The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Windows: running “mklink” as Administrator “You do not have sufficient privilege to perform this operation.”

Posted by jpluimers on 2019/08/19

Via “mklink” “You do not have sufficient privilege to perform this operation.”:

The [WayBack] mklink tool can create NTFS links so multiple directory entries point to the same object.

It requires the [WayBack] SeCreateSymbolicLinkPrivilege (in English Windows versions [WayBack] “Create symbolic links”) which is by default not granted to users as it can expose security vulnerabilities.

Even if a user in the Windows Administrators group has the privilege, it still cannot be executed from a regular command-prompt:

C:\Users\Develope>mklink "%temp%\Recycler" c:\$RECYCLE.BIN
You do not have sufficient privilege to perform this operation.

If you grant a regular user the privilege you can execute if from a regular command prompt.

However, as member of the Administrators group, you have to run this from an elevated command-prompt:

C:\Windows\system32>mklink "%temp%\Recycler" c:\$RECYCLE.BIN
symbolic link created for C:\Users\Developer\AppData\Local\Temp\Recycler <<===>> c:\$RECYCLE.BIN

The reason is that members of the Administrators group get two security tokens when they logon: an elevated full-access token and a regular filtered access token.

They key here are the words full-access and filtered: the elevated token gets more access permissions than the account is configured for, but the regular token gets less access permissions than the account is configured for.

This means that a standard command prompt will not get all the access you might exec, as the regular token is the access permissions minus the filtered permissions.

By now you probably guessed that – despite the documentation [WayBack] Windows Vista Application Development Requirements for User Account Control Compatibility leaving out SeCreateSymbolicLinkPrivilege – that is actually part of the filter. So the regular command-prompt lacks the SeCreateSymbolicLinkPrivilege permission and gives you an error message when executing mklink.

This is opposite to a regular user: if you grant it the “Create Symbolic Links” any command-prompt will get the SeCreateSymbolicLinkPrivilege permission.

–jeroen

via:

Posted in Power User, Windows | Leave a Comment »

When archiving in the WayBack machine returns error 400: clear your cookies

Posted by jpluimers on 2019/08/16

When archiving pages in the WayBack machine, despite Privacy Badger having set to “save no cookies”, it still managed to set truckloads of cookies.

So I used the Chrome settings in chrome://settings/content/cookies to disable cookies and now everything is fine.

–jeroen

Read the rest of this entry »

Posted in Chrome, Google, Internet, InternetArchive, Power User, Privacy, WayBack machine | Leave a Comment »

Excel on Mac OS X: Insert, move, or delete page breaks in a sheet

Posted by jpluimers on 2019/08/16

Since I always get confused by the differences in Excel versions (not just between Mac OS X  and Windows):

In Excel for Mac, you can adjust where automatic page breaks occur, add your own page breaks manually, and remove manual page breaks.

Source: [WayBack] Insert, move, or delete page breaks in a sheet.

–jeroen

Read the rest of this entry »

Posted in Excel, Office, Office 2011 for Mac, Power User | Leave a Comment »

Is This the Life We Really Want? : Roger Waters : Free Download & Streaming : Internet Archive

Posted by jpluimers on 2019/08/16

I forgot it was released, but then found back an old note to check it out:

[WayBack] Is This the Life We Really Want? : Roger Waters : Free Download & Streaming : Internet Archive

I quick listen to a few tracks reminds me of The Wall.

––jeroen.

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Posted in LifeHacker, Music, Power User | Leave a Comment »

TestInsight provides a local JSON web-server from the IDE for the test-runner to communicate from

Posted by jpluimers on 2019/08/15

Stefan Glienke shared the TestInsight default JSON web-server location with me through chat; I like it!

Some endpoints:

The mechanism for accessing this JSON server are implemented in the TestInsight.Client.pas

You can find the endpoint base URL in TestInsightSettings.ini which by default looks like this:

[Config]
BaseUrl=http://WIN10-DELPHI:8102

–jeroen

Posted in Conference Topics, Conferences, Delphi, Development, Event, Software Development | Leave a Comment »

When Powershell function won’t work: you define them with commas and parentheses, but call them with spaces and no parentheses

Posted by jpluimers on 2019/08/15

The function or command was called as if it were a method. 
Parameters should be separated by spaces. For information about 
parameters, see the about_Parameters Help topic.

Every now and then I bump into the above error. The reason is this:

  1. Functions are defined with commas between parameters and parentheses around them
  2. One-parameter functions can be called with one parameter surrounded by parentheses
  3. Multi-parameter functions need to be called with spaces between parameters and no parentheses surrounding them

Confused? #MeToo

The problem: [WayBack] about_Parameters_Default_Values | Microsoft Docs

Based on [WayBack] Powershell function won’t work.

–jeroen

Posted in CommandLine, Development, PowerShell, PowerShell, Scripting, Software Development | Leave a Comment »

Delphi, SHA-3 and streaming

Posted by jpluimers on 2019/08/15

If I ever need to use SHA-3 in Delphi: [WayBack] Does anyone know of any implementations of SHA-3, that can support TStream? – Nicholas Ring – Google+

The comments have a nice list of libraries supporting SHA-3, and how to do streaming hashing.

–jeroen

Posted in Delphi, Development, Software Development | 1 Comment »

Visual Studio Code direct download links

Posted by jpluimers on 2019/08/14

Visual Studio Code download links:

Via:

–jeroen

Posted in .NET, Development, Software Development, vscode Visual Studio Code | Leave a Comment »

PowerShell: be careful using `-ReadCount` on `Get-Content`

Posted by jpluimers on 2019/08/14

I learned this the hard way: [WayBack] Different result when using -ReadCount with Get-Content: because -ReadCount delivers data in chunks, the filter after [WayBack] Get-Content (Microsoft.PowerShell.Management) it will only filter on those chunks. If the filter isn’t prepared for that, it might only filter the last chunk.

So do not use for instance [WayBack] Select-String (Microsoft.PowerShell.Utility) on it, but perform your own [WayBack] ForEach-Object (Microsoft.PowerShell.Core) aliased as foreach like in [WayBack] Get all lines containing a string in a huge text file – as fast as possible?:

Get-Content myfile.txt -ReadCount 1000 |
  foreach { $_ -match "my_string" }

A more elaborate example is at [WayBack] How can I make this PowerShell script parse large files faster?.

–jeroen

Posted in CommandLine, Development, PowerShell, PowerShell, Scripting, Software Development | Leave a Comment »

What is ‘if __name__ == “__main__”‘ for?

Posted by jpluimers on 2019/08/14

One of the things when I learned Python was that in some scripts I found a block starting with a statement like this:

if __name__ == '__main__':

It looked like an idiom to me, and indeed it is: [WayBack] What is ‘if name == “main“‘ for?.

It allows a file to be both used as “main” standalone program file and a module. That section of code will not be executed if it is loaded as a module.

Part of the idiom is also to put your code in a separate method so this block is as short as possible.

if __name__ == '__main__':
main()

Via: [WayBack] Why is Python running my module when I import it, and how do I stop it? (thanks user166390 and Jeremy Banks for the answers there)

–jeroen

Posted in Development, Python, Scripting, Software Development | Leave a Comment »

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