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Posted by jpluimers on 2023/03/21
Will need this one day to gain better insight on how git works under the hood: [Wayback/Archive] git add a revision before first commit – Google Search
–jeroen
Posted in Development, DVCS - Distributed Version Control, git, Software Development, Source Code Management | Leave a Comment »
Posted by jpluimers on 2023/03/16
PolyShell is a script that’s simultaneously valid in Bash, Windows Batch, and PowerShell (i.e. a polyglot).
[Wayback/Archive] llamasoft/polyshell: A Bash/Batch/PowerShell polyglot!
Need to check this out, as often I have scripts that have to go from one language to the other or vice versa.
Maybe it enables one language to bootstrap functionality in the other?
The above polyglot started with a quest to see if I can could include some PowerShell statements in a batch file with two goals:
cmd.exe command prompt, then have it start PowerShell with the same command-line argumentsThe reasoning is simple:
cmd.exe or PowerShell are runningLots of users still live in the cmd.exe world, but PowerShell scripts are way more powerful, and since PowerShell is integrated in Windows since version 7, so having a batch file bootstrap PowerShell still makes sense.
Since my guess was about quoting parameters the right way, my initial search for the link below was [Wayback/Archive] powershell execute statement from batch file quoting – Google Search.
I have dug not yet into this, so there are still…
These should give me a good idea how to implement a polyglot batch file/PowerShell script.
dosps2.cmd:@findstr/v "^@f.*&" "%~f0"|powershell -&goto:eof
Write-Output "Hello World"
Write-Output "Hello some@com & again"
@f and including an & and passes everything else to PowerShell.C:\tmp>dosps2
Hello World
Hello some@com & againbut the second answer got me in the below polyglot search query
@@:: This prolog allows a PowerShell script to be embedded in a .CMD file.
@@:: Any non-PowerShell content must be preceeded by "@@"
@@setlocal
@@set POWERSHELL_BAT_ARGS=%*
@@if defined POWERSHELL_BAT_ARGS set POWERSHELL_BAT_ARGS=%POWERSHELL_BAT_ARGS:"=\"%
@@PowerShell -Command Invoke-Expression $('$args=@(^&{$args} %POWERSHELL_BAT_ARGS%);'+[String]::Join([char]10,$((Get-Content '%~f0') -notmatch '^^@@'))) & goto :EOF
@PowerShell -Command Invoke-Expression $('$args=@(^&{$args} %*);'+[String]::Join([char]10,(Get-Content '%~f0') -notmatch '^^@PowerShell.*EOF$')) & goto :EOF
…
There are quite a few quirks that were leveraged or had to be worked around:
- All three languages have different escape characters:
- Bash: backslash (
\)- Batch: caret (
^)- PowerShell: backtick (
`)- Escape characters work inside Bash and PowerShell strings, but not batch strings.
- Redirects (i.e.
<and>) have special meaning in all three languages unless quoted.- Redirects don’t have to be at the end of a command.
- This is valid Bash/Batch/PowerShell:
echo >output.txt "Hello World"- Batch is the only language without multi-line strings or comments.
- Batch treats
>as a redirect even when it directly touches a string, but PowerShell doesn’t.- Batch script
GOTOstatements only work when run as a script, not when run interactively.- PowerShell’s multi-line comment (
<#) must be immediately preceded by whitespace.- Bash’s here documents may begin anywhere so long as it’s unquoted and not a comment.
…
It also pointed me to the above repository on GitHub, so lets include it here as well:
cmd.exe prompt, and it hides that prompt after finishing. Need to figure out why, and if it can be prevented or undone.hideWindow $script:cmdPid # Prevent user from closing command prompt
Powerglot encodes several kind of scripts using polyglots, for example, offensive powershell scripts. It is not needed a loader to run the payload.
It basically is a Python script that allows you to generate a polyglot from multiple separate scripts.
iex, aka [Wayback/Archive] Invoke-Expression (Microsoft.PowerShell.Utility) – PowerShell | Microsoft Docs)
–jeroen
Posted in *nix, *nix-tools, bash, bash, Batch-Files, Development, JavaScript/ECMAScript, Perl, Polyglot, Power User, PowerShell, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2023/03/15
Yup, web browser bookmarklets, though hardly published about any more, I still like them (and wrote about them before). With a little bit, usually unreadable, JavaScript, they can add magical functionality to your browser.
So here are some links on Twitter related bookmarklets:
javascript:location.href='http://twitter.com/share?url='+encodeURIComponent(window.location.href)+'&text='+encodeURIComponent(document.title)
which I reworked into:
javascript:window.open('http://twitter.com/share?url='+encodeURIComponent(window.location.href)+'&text='+encodeURIComponent(document.title))
This is the right one:
javascript:(function(){n=getSelection().anchorNode;if(!n){t=document.title;}else{t=n.nodeType===3?n.data:n.innerText;}t='“'+t.trim()+'”\n\n';window.open(`https://twitter.com/intent/tweet?text=${encodeURIComponent(t)}${document.location.href}`)})();
which I reworked using «» quotes into:
javascript:(function(){n=getSelection().anchorNode;if(!n){t=document.title;}else{t=n.nodeType===3?n.data:n.innerText;}t='«'+t.trim()+'»\n\n';window.open(`https://twitter.com/intent/tweet?url=${document.location.href}&text=${encodeURIComponent(t)}`)})();
javascript:q = "" + (window.getSelection ? window.getSelection() : document.getSelection ? document.getSelection() : document.selection.createRange().text); if (!q) q = prompt("Please enter a Twitter handle", ""); if (q!=null) location="http://www.google.com/search?q=cache:https://twitter.com/" + escape(q).replace(/ /g, "+"); void 0
javascript:q = "" + (window.getSelection ? window.getSelection() : document.getSelection ? document.getSelection() : document.selection.createRange().text); if (!q) q = prompt("Please enter a Twitter handle", ""); if (q!=null) location="https://web.archive.org/web/*/https://twitter.com/" + escape(q).replace(/ /g, "+"); void 0
javascript:q = "" + (window.getSelection ? window.getSelection() : document.getSelection ? document.getSelection() : document.selection.createRange().text); if (!q) q = prompt("Please enter a Twitter handle", ""); if (q!=null) location="https://archive.md/https://twitter.com/" + escape(q).replace(/ /g, "+"); void 0
javascript:var u = window.location.protocol + '//' + window.location.host + window.location.pathname; var l = document.getElementsByTagName("link"); for (var i = 0; i < l.length; i ++) { if (l[i].getAttribute('rel') === 'canonical') {u = l[i].getAttribute('href')}}; window.open('https://twitter.com/search?q=' + encodeURIComponent(u) + '&src=paulmwatson');
All via [Wayback/Archive] twitter bookmarklet – Google Search.
–jeroen
Posted in Bookmarklet, Development, JavaScript/ECMAScript, Power User, Scripting, Software Development, Web Browsers, Web Development | Leave a Comment »
Posted by jpluimers on 2023/03/14
I need to try [Wayback/Archive] Live Share – Visual Studio Marketplace and get a feel for how it is to live share code: is it a way of working that fits me well?
This installs Live Share for Visual Studio Code:
code --install-extension MS-vsliveshare.vsliveshare code --install-extension MS-vsliveshare.vsliveshare-pack
The second extension is for [Wayback/Archive] Live Share Extension Pack – Visual Studio Marketplace, which got released about a year after the first one.
Live Share was introduced in 2017, a period when most of my work was outside the Visual Studio realm, Visual Studio Code was just starting to gain momentum over Atom (which was mul multi-platform editor of choice back then; I wrote about it in a few blog posts), and my then main development environment did not allow live sharing at all. so I missed all this (:
For my reading list:
Uses search queries:
The first query was my initial goal to accomplish, but I rather have the markdown files available off-line, so these did not help:
–jeroen
Posted in atom editor, Development, Power User, Software Development, Text Editors, vscode Visual Studio Code | Leave a Comment »
Posted by jpluimers on 2023/03/10
Welcome, #a11y squad! Axe-con is committed to providing an accessible conference experience, and having free registration is key to this commitment.
Please fill in the following information on the form below to reserve your spot at axe-con 2023. Registration will provide you with access to the live sessions and on-demand recordings of 60 sessions.
[Wayback/Archive] Register for axe-con | Digital Accessibility Conference
Via [Wayback/Archive] CircuitSwan on Twitter: “Deque Systems axe-con 2023 Free Registration Building accessible experiences #a11y Virtual Conference: March 15-16th, 2023 Registration will provide you with access to the live sessions and on-demand recordings of 60 sessions.”
Related: Read the rest of this entry »
Posted in accessibility (a11y), Development, Software Development | Leave a Comment »
Posted by jpluimers on 2023/03/08
This revealed so much pain: [Wayback] gist include image in markdown in current directory – Google Search
I wished that – like in the past – it would work just like in a normal github hosted git repository: [Wayback/Archive] How do I display local image in markdown? – Stack Overflow.
The core problem is that though a gist underneath is a git repository, it is rendered in a way that is different than a github repository is rendered, and that way of rendering has changed over the years effectively making it difficult to embed a picture. When you do embed an image requires the uuid/guid of the raw image URL to be included in the markdown, unlike with a regular repository hosted on github.
That is so much pain that I decided to not host documentation in gists any more.
A bit of the pain:
This is an example gist where I tried to host an image: [Wayback/Archive] Windows 7 with PowerShell v2 fails to upgrade to PowerShell v3 through chocolatey: You must provide a value expression on the right-hand side of the '-' operator.
That gist was prelude to my post Chocolatey on Windows 7: “You must provide a value expression on the right-hand side of the ‘-‘ operator.”.
–jeroen
Posted in Development, DVCS - Distributed Version Control, gist, git, GitHub, Lightweight markup language, MarkDown, Software Development, Source Code Management | Leave a Comment »
Posted by jpluimers on 2023/03/07
A long time ago, on just one system, I forgot which one, I needed explicit [Wayback/Archive] linux – Newline-separated xargs – Server Fault.
The simple solution was to replace the newline with null before running xargs:
tr '\n' '\0'
The clean solution was to install [Wayback/Archive] gnu xargs:
GNU xargs (default on Linux; install
findutilsfrom MacPorts on OS X to get it) supports [Wayback/Archive]-dwhich lets you specify a custom delimiter for input, so you can dols *foo | xargs -d '\n' -P4 foo
–jeroen
Posted in *nix, *nix-tools, bash, Development, Power User, Scripting, Software Development, xargs | Leave a Comment »
Posted by jpluimers on 2023/03/01
[Archive.is] Exact Instructions Challenge – THIS is why my kids hate me. | Josh Darnit – YouTube
We asked the kids to write instructions for a simple task but left out that we were going to be following their instructions EXACTLY as written. Great lesson for communication and a fun practice in patience!
Via [Archive] Maarten van Smeden on Twitter: “This is why programming is an acquired skill ” / Twitter
Q
It spurred all kinds of reactions about software development, like that programming should read like poetry, software development is about slowing down your thoughts, and that some high schools and some universities do this experiment at the start of their software development curriculum.
This is a cool experiment to do, even outside the USA, as many countries or regions have their own sandwich style, some of which are way harder to make than PB&J (:
Posted in Conference Topics, Conferences, Development, Event, Software Development | Leave a Comment »
Posted by jpluimers on 2023/02/28
[Wayback/Archive] Wireshark Cheat Sheet – Commands, Captures, Filters, Shortcuts
It is available both a huge [Wayback/Archive] jpg (2500×2096 pixels), so it already prints well on A5 or A4 sized paper for reference and as a [Wayback/Archive] PDF (so you can print it on even larger paper sizes).
Via: [Archive] Murdock (@Generic42) / Twitter in a DM.
–jeroen
Posted in *nix, *nix-tools, Communications Development, Development, Hardware, Network-and-equipment, Power User, Software Development, Wireshark | Leave a Comment »
Posted by jpluimers on 2023/02/22
For anyone else that things they are still stuck at Python 3.7 or older: [Wayback/Archive] How to Update Your Python Version Without Risk
Via [Wayback/Archive] CircuitSwan on Twitter: “#Python codebases are rarely updated due to time constraints, complexity & fear of breaking the build. Learn best practices to overcome this issue and reduce security risks! #100daysofcode”.
–jeroen
Posted in Development, Python, Scripting, Software Development | Leave a Comment »
The Wiert Corner - irregular stream of stuff 