cultural reviewer and dabbler in stylistic premonitions

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Cake day: January 17th, 2022

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  • I often see Rust mentioned at the same time as MIT-type licenses. Is it just a cultural thing that people who write Rust dislike Libre licenses?

    The word “libre” in the context of licensing exists to clarify the ambiguity of the word “free”, to emphasize that it means “free as in freedom” rather than “free as in beer” (aka no cost, or gratis) as the FSF explains here.

    The MIT license is a “libre” license, because it does meet the Free Software Definition.

    I think the word you are looking for here is copyleft: the MIT license is a permissive license, meaning it is not a copyleft license.

    I don’t know enough about the Rust community to say why, but from a distance my impression is that yes they do appear to have a cultural preference for permissive licenses.










  • for example, on a linux distro, we could modify the desktop environment and make it waaaaay lighter by getting rid of jpg or png icons and just using pure svg on it.

    this has largely happened; if you’re on a dpkg-based distro try running this command:

    dpkg -S svg | grep svg$ | sort

    …and you’ll see that your distro includes thousands of SVG files :)

    explanation of that pipeline:
    • dpkg -S svg - this searches for files installed by the package manager which contain “svg” in their path
    • grep svg$ - this filters the output to only show paths which end with svg; that is, the actual svg files. the argument to grep is a regular expression, where $ means “end of line”. you can invert the match (to see the paths dpkg -S svg found which only contain “svg” in the middle of the path) by writing grep -v svg$ instead.
    • the sort command does what it says on the tin, and makes the output easier to read

    you can run man dpkg, man grep, and man sort to read more about each of these commands.


  • No, SVG files are not HTML.

    Please change this post title (currently “today i learned: svg files are literally just html code”), to avoid spreading this incorrect factoid!

    I suggest you change it to “today i learned: svg files are just text in an html-like language” or something like that. edit: thanks OP

    SVG is a dialect of XML.

    XML and HTML have many similarities, because they both are descendants of SGML. But, as others have noted in this thread, HTML is also not XML. (Except for when it’s XHTML…)

    Like HTML, SVG also can use CSS, and, in some environments (eg, in browsers, but not in Inkscape) also JavaScript. But, the styles you can specify with CSS in SVG are quite different than those you can specify with CSS in HTML.

    Lastly, you can embed SVG in HTML and it will work in (modern) browsers. You cannot embed HTML in SVG, however.














  • Note: for readers who aren’t aware, the notation ^X means hold down the ctrl key and type x (without shift).

    ctrl-a though ctrl-z will send ASCII characters 1 through 26, which are called control characters (because they’re for controling things, and also because you can type them by holding down the control key).

    ^D is the EOF character.

    $ stty -a | grep eof
    intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
    $ man stty |grep -A1 eof |head -n2
           eof CHAR
                  CHAR will send an end of file (terminate the input)
    

    Nope, Chuck Testa: there is no EOF character. Or, one could also say there is an EOF character, but which character it is can be configured on a per-tty basis, and by default it is configured to be ^D - which (since “D” is the fourth letter of the alphabet) is ASCII character 4, which (as you can see in man ascii) is called EOT or “end of transmission”.

    What that stty output means is that ^D is the character specified to trigger eof. That means this character is intercepted (by the kernel’s tty driver) and, instead of sending the character to the process reading standard input, the tty “will send an end of file (terminate the input)”.

    By default eof is ^D (EOT), a control character, but it can be set to any character.

    For instance: run stty eof x and now, in that terminal, “x” (by itself, without the control key) will be the EOF character and will behave exactly as ^D did before. (The rest of this comment assumes you are still in a normal default terminal where you have not done that.)

    But “send an end of file” does not mean sending EOT or any other character to the reading process: as the blog post explains, it actually (counterintuitively) means flushing the buffer - meaning, causing the read syscall to return with whatever is in the buffer currently.

    It is confusing that this functionality is called eof, and the stty man page description of it is even more so, given that it (really!) does actually flush the contents of the buffer to read - even if the line buffer is not empty, in which case it is not actually indicating end-of-file!

    You can confirm this is happening by running cat and typing a few characters and then hitting ^D, and then typing more, and hitting ^D again. (Each time you flush the buffer, cat will immediately echo the latest characters that had been buffered, even though you have not hit enter yet.)

    Or, you can pipe cat into pv and see that ^D also causes pv to receive the buffer contents prior to hitting enter.

    I guess unix calls this eof because this function is most often used to flush an empty buffer, which is how you “send an end of file” to the reader.

    The empty-read-means-EOF semantics are documented, among other places, in the man page for the read() syscall (man read):

    RETURN VALUE
          On success, the number of bytes read is returned (zero indicates end of
          file), and the file position is advanced by this number.
    

    If you want to send an actual ^D (EOT) character through to the process reading standard input, you can escape it using the confusingly-named lnext function, which by default is bound to the ^V control character (aka SYN, “synchronous idle”, ASCII character 22):

    $ man stty|grep lnext -A1
           * lnext CHAR
                  CHAR will enter the next character quoted
    $ stty -a|grep lnext
    werase = ^W; lnext = ^V; discard = ^O; min = 1; time = 0;
    

    Try it: you can type echo " and then ctrl-V and ctrl-D and then "|xxd (and then enter) and you will see that this is sending ascii character 4.

    You can also send it with echo -e '\x04'. Note that the EOT character does not terminate bash:

    $ echo -e '\x04\necho see?'|xxd
    00000000: 040a 6563 686f 2073 6565 3f0a            ..echo see?.
    $ echo -e '\x04\necho see?'|bash
    bash: line 1: $'\004': command not found
    see?
    

    As you can see, it instead interprets it as a command.

    (Control characters are perfectly cromulent filenames btw...)
    $ echo -e '#!/bin/bash\necho lmao' > ~/.local/bin/$(echo -en '\x04')
    $ chmod +x ~/.local/bin/$(echo -en '\x04')
    $ echo -e '\x04\necho see?'|bash
    lmao
    see?
    


  • Arthur Besse@lemmy.mlMtoLinux@lemmy.mlroot (or sudo) access delay instead of password
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    6 days ago

    sure. first, configure sudo to be passwordless, or perhaps just to stay unlocked for longer (it’s easy to find instructions for how to do that).

    then, put this in your ~/.bashrc:

    alias sudo='echo -n "are you sure? "; for i in $(seq 5); do echo -n "$((6 - $i)) "; sleep 1; done && echo && /usr/bin/sudo '

    Now “sudo” will give you a 5 second countdown (during which you can hit ctrl-c if you change your mind) before running whatever command you ask it to.




  • Arthur Besse@lemmy.mltoWikipedia@lemmy.worldGene Sharp
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    6 days ago

    from Change Agent: Gene Sharp’s Neoliberal Nonviolence :

    Sharp’s ideas about nonviolent action are generally billed as apolitical, post-ideological, common sense activist strategy and tactics. But they actually flowed from a clear worldview. Sharp saw “centralized government” as the key vector of violence in the modern world. He supported “decentralizing” state functions to “independent,” “non-State” institutions—a prescription that sounds a lot like privatization. Importantly, he argued nonviolent action itself was the most strategic way to bring about this state transformation.

    With the rise of the Reagan-era foreign policy of communist “rollback,” Sharp began promoting “strategic nonviolence” internationally through his Albert Einstein Institution (AEI). Sharp co-founded AEI with his former student Peter Ackerman, who was simultaneously right hand man to the notorious corporate raiding “junk bond king” Michael Milken. Later, Ackerman was a Cato Institute board member and advocate of disemboweling social security. AEI spent the 1980s, 1990s, and 2000s training activists, policymakers, and defense leaders around the world in Sharp’s nonviolent methods, supporting numerous “color revolutions”—again and again in state socialist countries whose administrations were attempting to oppose the privatization, austerity policies, and deregulation being pushed by the International Monetary Fund (IMF), World Bank, and U.S. Treasury-led “Washington Consensus.” Sharp’s “people-powered” nonviolent “ju-jitsu” would prove surprisingly effective, distinguishing itself as a powerful weapons system in the U.S. regime change arsenal. While AEI was an independent non-profit, it had significant connections to the U.S. defense and intelligence community. One prominent AEI consultant was Colonel Robert Helvey, former dean of the National Defense Intelligence College. AEI’s regular funders included U.S. government pass-throughs like the U.S. Institute for Peace, the International Republican Institute, and the National Endowment for Democracy.

    Kombucha Girl meme format, top text "libertarians be like", disgusted face next to "tyranny.gov", reconsidering face next to "tyranny.com"





  • Nice post, but your title is misleading: the blog post is actually titled “Supply Chain Attacks on Linux distributions - Overview” - the word “attacks” as used here is a synonym for “vulnerabilities”. It is not completely clear from their title if this is going to be a post about vulnerabilities being discovered, or about them actually being exploited maliciously, but the latter is at least not strongly implied.

    This lemmy post however is titled (currently, hopefully OP will retitle it after this comment) “Supply Chain Attack found in Fedora’s Pagure and openSUSE’s Open Build Service”. edit: @OP thanks for changing the title!

    Adding the word “found” (and making “Attack” singular) changes the meaning: this title strongly implies that a malicious party has actually been detected performing a supply chain attack for real - which is not what this post is saying at all. (It does actually discuss some previous real-world attacks first, but it is not about finding those; the new findings in this post are vulnerabilities which were never attacked for real.)

    I recommend using the original post title (minus its “Overview” suffix) or keeping your more verbose title but changing the word “Attack” to “Vulnerabilities” to make it clearer.

    TLDR: These security researchers went looking for supply chain vulnerabilities, and found several bugs in two different systems. After responsibly disclosing them, they did these (very nice and accessible, btw - i recommend reading them) writeups about two of the bugs. The two they wrote up are similar in that they both involve going from being able to inject command line arguments, to being able to write to a file, to being able to execute arbitrary code (in a context which would allow attackers to perform supply chain attacks on any software distributed via the targeted infrastructure).



  • Fuck this project, but… their source code can be free and open source even if they distribute binaries which aren’t. (Which they can do if they own the copyright, and/or if it is under a permissive non-copyleft FOSS license.)

    And if the source code is actually FOSS, and many people actually want to use it, someone else will distribute FOSS binaries without this stupid EULA. So, this BS is still much better than a non-FOSS license like FUTO’s.


  • cross-post of my comment elsewhere:

    I immediately knew this was going to be from Microsoft users, and yeah… of course, it is.

    Binaries distributed under this EULA do not meet the free software definition or open source definition.

    However, unlike most attempts to dilute the concept of open source, since the EULA is explicitly scoped to binaries and says it is meant to be applied to projects with source code that is released under an OSI-approved license, I think the source code of projects using this do still meet the open source definition (as long as the code is actually under such a license). Anyone/everyone should still be free to fork any project using this, and to distribute free binaries which are not under this EULA.

    This EULA obviously cannot be applied to projects using a copyleft license, unless all contributors to it have dual-licensed their contributions to allow (at least) the entity that is distributing non-free binaries under this EULA to do so.

    I think it is extremely short-sighted to tell non-paying “consumers” of an open source project that their bug reports are not welcome. People who pay for support obviously get to heavily influence which bugs get priority, but to tell non-paying users that they shouldn’t even report bugs is implicitly communicating that 2nd and 3rd party collaboration on fixing bugs is not expected or desired.

    A lot of Microsoft-oriented developers still don’t understand the free software movement, and have been trying to twist it into something they can comprehend since it started four decades ago. This is the latest iteration of that; at least this time they aren’t suggesting that people license their source code under non-free licenses.