The Wiert Corner – irregular stream of stuff

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

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Archive for the ‘Development’ Category

Recent bitsaver entries on Z80 assembly, CPM and concurrent Pascal

Posted by jpluimers on 2017/06/26

–jeroen

Posted in Assembly Language, CP/M, Development, History, Software Development, Z80 | Leave a Comment »

middelink/mikrotik-fwban: Use your Mikrotik firewall to do fail2ban like blocking of unwanted IPs. Written in Go

Posted by jpluimers on 2017/06/26

Edit 20260501: be careful, as this damaged the NAND memory of my router because of too many write cycles. Root cause: too high update frequency.

Interesting: middelink/mikrotik-fwban: Use your Mikrotik firewall to do fail2ban like blocking of unwanted IPs. Written in Go.

It might beat these (that just count SSH connections, not failed connection attempts)

Read the rest of this entry »

Posted in Development, Hardware, Internet, MikroTik, Network-and-equipment, Power User, RouterOS, routers, Scripting, Software Development, WinBox | Leave a Comment »

Anyone having a solution for “Microsoft Visual Studio” throwing “The operation could not be completed” when including a file in a PowerShell project?

Posted by jpluimers on 2017/06/22

The operation could not be completed.

The operation could not be completed.

Include In Project

Include In Project

I’ve got a bunch of PowerShell projects in a solution. In some of them, I can include new files, in others I get the below error.

The diff of a good/bad project is below as well.

Two questions:

  1. Does anybody know how to work around this?
  2. Does anybody know how to find the actual error for this?

---------------------------
Microsoft Visual Studio
---------------------------
The operation could not be completed
---------------------------
OK
---------------------------

Good file: WindowsLogsCbsInquiry.pssproj

Bad file: WindowsTempInquiry.pssproj

–jeroen

Read the rest of this entry »

Posted in CommandLine, Development, PowerShell, Software Development, Visual Studio 2015, Visual Studio and tools | Leave a Comment »

Another of +Steven Wittens step-by-step visual mathematical explorations

Posted by jpluimers on 2017/06/22

Another of +Steven Wittens step-by-step visual mathematical explorations: Fourier Analysis Look and Listen For this one headphones and a microphone are required, including a good machine…

–jeroen

–more–

Posted in Algorithms, Development, Software Development | Leave a Comment »

OpenSuSE Tumbleweed – testing the password of any user with getent and openssl

Posted by jpluimers on 2017/06/21

For one of my VMs I forgot to note which of the initial password I had changed, so I wanted to check them.

Since I didn’t have a keyboard attached to the console and ssh wasn’t allowing root, I needed an alternative than actual login to test the passwords.

Luckily /etc/shadow, with getent and openssl came to the rescue.

Since getent varies per distribution, here is how it works on OpenSuSE:

Read the rest of this entry »

Posted in *nix, *nix-tools, ash/dash, bash, bash, Development, Encoding, Hashing, Linux, md5, openSuSE, Power User, Scripting, Security, SHA, SHA-256, SHA-512, Software Development, SuSE Linux | Leave a Comment »

When someone writes UTF-8 and UTF-16 strings to the same file in binary format without converting between them…

Posted by jpluimers on 2017/06/21

A while ago, I had to fix some stuff in an application that would write – using a binary mechanism – UTF-8 and UTF-16 strings (part of it XML in various flavours)  to the same byte stream without converting between the two encodings.

Some links that helped me investigate what was wrong, choose what encoding to use for storage and fix it:

–jeroen

Posted in Delphi, Delphi 10 Seattle, Delphi 10.1 Berlin (BigBen), Delphi XE8, Development, Encoding, Software Development, UTF-16, UTF-8, UTF16, UTF8, XML, XML/XSD | 3 Comments »

How can I get the default code page for a locale? – The Old New Thing

Posted by jpluimers on 2017/06/20

Ask GetLocaleInfo (example function GetAnsiCodePageForLocale included): [WayBackHow can I get the default code page for a locale? – The Old New Thing

UINT GetAnsiCodePageForLocale(LCID lcid)
{
  UINT acp;
  int sizeInChars = sizeof(acp) / sizeof(TCHAR);
  if (GetLocaleInfo(lcid,
                    LOCALE_IDEFAULTANSICODEPAGE |
                    LOCALE_RETURN_NUMBER,
                    reinterpret_cast<LPTSTR>(&acp),
                    sizeInChars) != sizeInChars) {
    // Oops - something went wrong
  }
  return acp;
}

And even though you didn’t ask, you can use LOCALE_IDEFAULT­CODE­PAGE to get the OEM code page for a locale.

Bonus gotchaThere are a number of locales that are Unicode-only. If you ask the Get­Locale­Info function and ask for their ANSI and OEM code pages, the answer is “Um, I don’t have one.” (You get zero back.)

Related:

–jeroen

Posted in Development, Encoding, internatiolanization (i18n) and localization (l10), Software Development, The Old New Thing, Windows Development, Windows-1252 | 2 Comments »

Mac OS X – need to research this one day: How do I Check DHCP Lease info in terminal – via Ars Technica OpenForum

Posted by jpluimers on 2017/06/20

One day I need to research how to get the conversions right for this: How do I Check DHCP Lease info in terminal – Ars Technica OpenForum as I think that ipconfig getoption en0 lease_time gives me the value in a different format than date -r expects.

Also:

At T1 seconds (typically set to 0.5*lease_time) after the last successful renewal, the DHCP client attempts to renew it’s lease with the DHCP server that granted it’s current address via unicast. If unsuccessful, at T2 seconds (typically set to 0.875*lease_time) after the last renewal, the DHCP client attempts to rebind with any DHCP server via multicast.

–jeroen

Posted in Apple, bash, Development, Mac, Mac OS X / OS X / MacOS, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.9 Mavericks, Power User, Scripting, Software Development | Leave a Comment »

URLs for Mikrotik PCC load balancing

Posted by jpluimers on 2017/06/16

PCC load balancing saved my ass; here are some link I used:

–jeroen

Posted in Development, Internet, MikroTik, Power User, RouterOS, routers, Scripting, Software Development | Leave a Comment »

Parable of the Polygons – a playable post on the shape of society

Posted by jpluimers on 2017/06/15

A diverse community pays off but also needs investment from everyone. Small steps…

A playable post on how harmless choices can make a harmful world.

Source: Parable of the Polygons – a playable post on the shape of society

–jeroen

Posted in Development, Fun, History, Software Development | Leave a Comment »