Posted by jpluimers on 2017/10/25
History: Borland C++ source code for the PC-MOS/386 5.01 version at roelandjansen/pcmos386v501: PC-MOS/386 v5.01 final release including cdrom driver sources.
Related:
–jeroen
Via: [WayBack/Archive.is] PC-MOS/386 is na dertig jaar opensourcesoftware – Computer – .Geeks – Tweakers
Posted in Borland C++, C, C++, Development, History, Software Development | Leave a Comment »
Posted by jpluimers on 2017/10/03
Some very interesting links:
–jeroen
Posted in C, C++, Development, Software Development, Visual Studio C++ | Leave a Comment »
Posted by jpluimers on 2017/08/22
Found out about this a while ago:
MAC-Telnet – Open source MAC Telnet client and server for connecting to Microtik RouterOS routers and Posix machines via MAC address.
Source: haakonnessjoen/MAC-Telnet: Open source MAC Telnet client and server for connecting to Microtik RouterOS routers and Posix machines via MAC address. [Fork]
Background:
Earlier, I wrote about a Wireshark plugin for dissecting Mac-Telnet packets. Now I have created an open source application for connecting to a RouterOS router.
Source: RouterOS Mac-Telnet application for Linux users | Håkon Nessjøen [WayBack]
My previous post was about RouterOS Mac-Telnet application for Linux users where I talked about the MAC-Telnet client I created for Linux users.
Source: MAC-address based Telnet server in Linux | Håkon Nessjøen [WayBack]
–jeroen
Posted in C, Development, Internet, MikroTik, Power User, routers, Software Development | Leave a Comment »
Posted by jpluimers on 2017/08/16
Thanks R.. for answering this:
POSIX has a formula for exactly what you want:
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html#tag_04_15 [WayBack]
tm_sec + tm_min*60 + tm_hour*3600 + tm_yday*86400 + (tm_year-70)*31536000 + ((tm_year-69)/4)*86400 - ((tm_year-1)/100)*86400 + ((tm_year+299)/400)*86400This works whenever you have a broken-down time in GMT, even if the underlying system’s
mktime, etc. functions do not use the same formattime_tas “Unix timestamps”.If your original time is in local time, you can use
mktimeandgmtimeto convert it to GMT using the system’s notion of timezone rules. If you want to apply your own timezone offset rules, just do that manually before using the above formula.
Source: What is the right way to convert into UNIX timestamp from the date and time in C/C++? – Stack Overflow [WayBack]
For testing and more examples: Epoch Converter – Unix Timestamp Converter [WayBack]
Hopefully this will help me getting better implementations for these:
–jeroen
Posted in Algorithms, C, C++, Development, Software Development | Leave a Comment »
Posted by jpluimers on 2017/03/28
I salvaged one of the many incarnations of wintee: wintee/wintee at master · jpluimers/wintee
So I’ve another tee implementation apart from my C# port of tee.
–jeroen
via: cmd – Displaying Windows command prompt output and redirecting it to a file – Stack Overflow
Posted in C, Development, Software Development | Leave a Comment »
Posted by jpluimers on 2016/11/12
Calling C libraries from bash with virtual automatic data conversion based on symbol info in the .so files.
Source: Tavis Ormandy: Just when you thought we couldn’t take this any further…
–jeroen
Posted in bash, C, Development, gcc, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2016/08/30
Thanks David Berneda for sharing this a while ago:
Cool little trick to show all the preset variables for your GCC/Clang compiler:
clang -E -dM - < /dev/nullI’ve always wondered how to get these. Some are kind of surprising, especially since there are 320 of them, at least on my system.
On my system (Mavericks, I wish the sw_vers console tool would tell that): 170 lines.
Posted in Apple, C, C++, Development, Mac OS X / OS X / MacOS, OS X 10.9 Mavericks, Power User, Software Development | Leave a Comment »
Posted by jpluimers on 2016/02/12
For a short while (from Windows 2003 Service Pack 1 till Windows 2003 service pack 2) some updates used Windows Hotpatching.
Some links on the how/why and how to abuse it:
All because of this little post:
Hier ein Einblick in die Denkweise von Leuten, die Software auf CD-ROM verteilen und bei denen Release Zyklen in Monaten und nicht Minuten gemessen werd… – Kristian Köhntopp – Google+
–jeroen
Posted in C, Development, History, Software Development, The Old New Thing, Windows Development | Leave a Comment »
Posted by jpluimers on 2016/01/27
Even after the SpeedTouch password algorithms were disclosed 2008, ISPs keep using weak algorithms to generate their default WPA/WPA2 passwords in their routers:
A short while ago, blasty published code to generate the WPA2 passwords for UPC routers. Even though Ziggo now owns UPC, a lot of this UPC equipment is still in use. I guess it won’t be for long that similar code for Ziggo routers will be published too.
The code at https://haxx.in/upc_keys.c is easy to download, build and run on a Mac OS X machine even when you don’t have Xcode installed (use the “xcode-select –install” trick):
wget https://haxx.in/upc_keys.c gcc -O2 -o upc_keys upc_keys.c -lcrypto ./upc_keys UPC0053284 5 ./upc_keys UPC0053284 24
–jeroen
Posted in *nix, *nix-tools, Apple, C, Development, gcc, Mac, Mac OS X / OS X / MacOS, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, MacMini, OS X 10.10 Yosemite, Power User, Software Development | Leave a Comment »
Posted by jpluimers on 2015/10/07
A long time ago, there was an interesting discussion here: I was wondering, that what is the closest value to the Zero floating point can have.
Recently I needed to do some calculations on series where getting close to zero could become a problem.
In practice it depends a lot on what you are doing. Sometimes absolute Epsilons are best, but at other times relative difference is much more applicable.
Then there is also a Machine Epsilon: a way to derive an Epsilon from a data type that works in all languages and platforms.
–jeroen
Posted in .NET, Algorithms, C, C#, C++, Delphi, Development, Floating point handling, Software Development | 1 Comment »
The Wiert Corner - irregular stream of stuff 