The Wiert Corner – irregular stream of stuff

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

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tmux attach to named session or create when it doesn’t exist yet – via: How to start tmux with attach if a session exists – Unix & Linux Stack Exchange

Posted by jpluimers on 2016/11/16

In my alias list:

alias "tmux-attach-or-create-main-session=tmux new-session -A -s main"

Via User Wesley Baugh – Unix & Linux Stack Exchange who answered:

If naming your session is okay, then it’s easy to do with the new-session command:

tmux new-session -A -s main

where main is the session name that will be attached to or created if needed.

From man tmux

 The -A flag makes new-session behave like attach-session if session-name already exists; in this case, -D behaves like -d to attach-session.

–jeroen

Source: How to start tmux with attach if a session exists – Unix & Linux Stack Exchange

Posted in *nix, *nix-tools, Linux, openSuSE, Power User, SuSE Linux, tmux | Leave a Comment »

`xcode-select –install` required for OS X 10.9 Xcode command-line tools (like `zlib-devel`)

Posted by jpluimers on 2016/11/16

Hopefully this was a one time oversight from Apple, but on OS X 10.9 (Mavericks) the Xcode command-line tools cannot be installed from the Xcode Preferences pane.

You have to install them from the command-line:

xcode-select --install

There is one catch though: it might fail as you first have to start Xcode once and accept the license agreement.

You need them for instance when playing with zlib-devel (for instance when creating your own openssl builds).

–jeroen

Posted in Apple, Development, Mac OS X / OS X / MacOS, OS X 10.9 Mavericks, Power User, Software Development, xCode/Mac/iPad/iPhone/iOS/cocoa | Leave a Comment »

Positive: Delphi 10.1 Berlin Update 2 is out – ISO links

Posted by jpluimers on 2016/11/15

Since I’m lazy and always misplace how to get the ISOs:

–jeroen

Reference: Positive: Delphi 10.1 Berlin is out; negative all Embarcadero HTTPS sites still vulnerable to DROWN attack « The Wiert Corner – irregular stream of stuff

Posted in Delphi, Delphi 10.1 Berlin (BigBen), Development, Software Development | 1 Comment »

Oh nice: the compiler settings in your .dproj files are not reflected in what Ctrl-O O emits in XE7

Posted by jpluimers on 2016/11/15

I need to test this with other Delphi versions:

Oh nice: the compiler settings in your .dproj files are not reflected in what Ctrl-O O emits as it always puts this as first line in your source code for Delphi XE7:

{$A8,B-,C+,D+,E-,F-,G+,H+,I+,J-,K-,L+,M-,N-,O+,P+,Q-,R-,S-,T-,U-,V+,W-,X+,Y+,Z1}

Which means that changing integer values in <DCC_Alighment> or <DCC_MinimumEnumSize> and boolean values in <DCC_Optimize> have no effect.

Bummer.

Source: Oh nice: the compiler settings in your .dproj files are not reflected in what…

I will officially report it as soon as https://www.ssllabs.com/ssltest/analyze.html?d=quality.embarcadero.com grades B or better.

And I need to find out if I can help determining which of these causes it via [WayBack] Thomas Mueller (dummzeuch) – Google+:

There are two possibilities:
1. The settings in the dproj file have no effect
2. The settings Ctrl-O O writes to the source file do not reflect the actual compiler settings but are hard coded instead.
(3. Both)

–jeroen

 

 

Posted in Delphi, Delphi XE7, Development, Software Development | Leave a Comment »

Angular 2: Show me the Money!

Posted by jpluimers on 2016/11/15

In the enterprise, Angular is a safe bet!

Source: Angular 2: Show me the Money!

Posted in Angular 2, Development, JavaScript/ECMAScript, Scripting, Software Development | Leave a Comment »

OpenSuSE and logging: no more syslogd; journald is default, you can use rsyslog or syslog-NG as syslogd replacements

Posted by jpluimers on 2016/11/15

In the 1990s and early 2000s I did a lot of Unix-Like (Minix, SunOS, HP-UX, Xenox) and later Linux (mostly RedHat and SuSE) work. The internet and Linux weren’t as big as they are now and old stuff was still in use including syslogd.

So recently wanting to do more on the Linux side of things using OpenSuSE (as 15+ years ago, I spent most of my time with SuSE Linux) and assumed logging was still done using syslogd like Mac OS X does.

Boy, I was wrong. Like the internet and lots of other things, logging on OpenSuSE has fragmented in at least these three categories of which two syslog implementations (but syslogd is deprecated and – according to the URC #SUSE Channel – unmaintained):

  • journald (installed by default on my Tumbleweed text-only systems)
  • rsyslog (which is supposed to be default on modern OpenSuSE installs but somehow isn’t on my Tumbleweed but is on 13.1 and 13.2)
  • syslog-ng
  • proprietary logging (of many applications in /var/log like named, apache, etc)

There seems to be heated debates on what to use when, so I’ll try to stick with the defaults as much as possible.

A few things I need to sort out:

  1. where is journald persisted?
  2. how can journald being rotated?
  3. what to do with packages that require one form of syslog or the other?
    • not sure yet
  4. can I direct journald to a syslog implementation?
  5. how does this apply to other distros?
    • not sure yet

Tonu Su (TSu2) posted an elaborate answer on the above questions on the OpenSuSE forums.

–jeroen

via:

Posted in *nix, *nix-tools, About, Linux, openSuSE, Power User, RedHat, SuSE Linux, Tumbleweed | 2 Comments »

Determine Domain and username used when a network share was mapped

Posted by jpluimers on 2016/11/15

Need to research this a bit further as this works:

powershell gwmi -Query 'Select LocalName, RemoteName, UserName from Win32_NetworkConnection'
__GENUS : 2
__CLASS : Win32_NetworkConnection
__SUPERCLASS :
__DYNASTY :
__RELPATH :
__PROPERTY_COUNT : 3
__DERIVATION : {}
__SERVER :
__NAMESPACE :
__PATH :
LocalName :
RemoteName : \\w701ujpl\IPC$
UserName : EN81ENTx64SCAN\jeroenp
PSComputerName :

But this fails for some Powershell versions:

powershell
gwmi -Query 'Select * from Win32_NetworkConnection' | Select-Object LocalName, RemoteName, UserName, ConnectionState | Sort-Object LocalName | ft -auto

–jeroen

Source: user – Determine Domain and username used to map a network drive – Stack Overflow

Posted in Development, PowerShell, Scripting, Software Development | 1 Comment »

Audio Tape Recovery – recording old audio cassettes on modern hardware

Posted by jpluimers on 2016/11/14

I need this one day: Audio Tape Recovery – Saving the Tapes

Recording done on an IBM ThinkPad X30 using Gnome Sound Recorder, post processing on an IBM ThinkPad X200 using Audacity.

–jeroen

via Will Hill commenting on  Watch how old technology can make a comeback with trends, product quality and nostalgia. This is the last cassette factory in the world and the machines… – Jan Wildeboer – Google+

Posted in Audacity, Audio, History, LifeHacker, Media, Power User | Leave a Comment »

Can I connect to or view abandoned ssh sessions?

Posted by jpluimers on 2016/11/14

Boy  I wish I had known about screen and tmux years ago. Screen is such a generic term that I never bumped into it, but tmux is easier to find and I like it more. When on the road, I regularly loose SSH sessions, so I’ve been starting tmux ever since I discovered it and reattach to it whenever needed thereby getting the same exact she’ll I was connected to.
http://unix.stackexchange.com/q/598/69111

–jeroen

Posted in *nix, *nix-tools, Communications Development, Development, Linux, openSuSE, Power User, SSH, SuSE Linux, TCP | Leave a Comment »

Bash on C steroids… Tavis Ormandy: Just when you thought we couldn’t take this any further…

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…

Via: From the I wish it was PHP Dept: Calling native C functions from arbitrary shared libraries, using auto-generated marshaling relying on implementation details of bash associative arrays for member order preservation. “There’s enough data in the compiler debugging data for us to reconstruct the original types, so we parse it and translate it into a format that can be used in bash – It’s surprising how well this works!” The surprising thing is that works at all. – Kristian Köhntopp – Google+

–jeroen

Posted in bash, C, Development, gcc, Scripting, Software Development | Leave a Comment »

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