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:
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 »
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:
TEncoding.UTF8.GetBytes: utf 8 – String to byte array in UTF-8? – Stack OverflowSysUtils.ByteLength() is not the nicest function, so use only for a quick-fix Delphi Unicode String Length in Bytes – Stack OverflowAnsiString, UnicodeString et al: String Types (Delphi) – RAD Studio–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 »
Posted by jpluimers on 2017/06/20
Ask GetLocaleInfo (example function GetAnsiCodePageForLocale included): [WayBack] How 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_IDEFAULTCODEPAGEto get the OEM code page for a locale.Bonus gotcha: There are a number of locales that are Unicode-only. If you ask the
GetLocaleInfofunction 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 »
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 »
Posted by jpluimers on 2017/06/16
PCC load balancing saved my ass; here are some link I used:
Source: PCC side effect on Mikrotik Forum – MikroTik RouterOS
–jeroen
Posted in Development, Internet, MikroTik, Power User, RouterOS, routers, Scripting, Software Development | Leave a Comment »
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 »
Posted by jpluimers on 2017/06/14
Some links that inspired me for various Mikrotik firewall rules:
–jeroen
Posted in Development, Internet, MikroTik, Power User, RouterOS, routers, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/06/13
It looks like Microsoft and Embarcadero solved their ends for [WayBack] Windows 10 Creators update and Delphi debugging don’t go well… :
The issue was caused by the Windows LoadLibrary trying to optimise loading which backfired for libraries (PE files like DLL/EXE…) that have multiple import tables in them as generated by the Delphi and C++ Builder linker (and maybe other linkers as well).
Microsoft finetuned their optimisation whereas a future update to Delphi and C++ Builder will generate more optimised import tables.
–jeroen
via [WayBack] Blog post “The Issue with Delphi Runtime Packages and Windows 10 Creators Update”… – Marco Cantù – Google+
Posted in Delphi, Development, Power User, Software Development, Windows, Windows 10 | Leave a Comment »
Posted by jpluimers on 2017/06/13
For my research list:
–jeroen
Posted in Development, Internet, MikroTik, Power User, RouterOS, routers, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/06/13
When this developer finally went to commit his/her changes, they had also reformatted most of the codebase into his/her preferred coding style/format. This was even for files for which no other changes had been made!Imagine the next developer coming along and pulling down the latest changes from the source control system and trying to merge them into their own local changes.
Because of all these code-format-only changes, it became nearly impossible to merge any changes without going through every conflicted file and painstakingly reconcile the changes.
I’ve seen this happen on a few projects where there have been sequential single developers some of which reformatted the whole code base within a few days of taking over.
It made it impossible to perform a “blame” or proper history tracking of feature changes.
That increased the cost of maintenance a lot.
I’ve been on several teams that enforced a pre-checkin standardised formatting of the code. Only rarely that causes problems, usually it’s a blessing to as it makes for a consistent formatting of the code-base where it is much easier to cut the crap and focus on what the real problem is.
–jeroen
Source: The Oracle at Delphi: Code is the language, formatting is the dialect.
Posted in .NET, C#, Delphi, Development, Software Development | 2 Comments »
The Wiert Corner - irregular stream of stuff 