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IT NewsRust Drives a Linux USB Device - In theory, writing a Linux device driver shouldn’t be that hard, but it is harder ... - <a href="https://hackaday.com/2025/06/26/rust-drives-a-linux-usb-device/" rel="nofollow noopener" translate="no" target="_blank">https://hackaday.com/2025/06/26/rust-drives-a-linux-usb-device/</a> <a href="https://schleuss.online/tags/linuxhacks" class="mention hashtag" rel="nofollow noopener" target="_blank">#linuxhacks</a> <a href="https://schleuss.online/tags/libusb" class="mention hashtag" rel="nofollow noopener" target="_blank">#libusb</a> <a href="https://schleuss.online/tags/linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#linux</a> <a href="https://schleuss.online/tags/rust" class="mention hashtag" rel="nofollow noopener" target="_blank">#rust</a> <a href="https://schleuss.online/tags/usb" class="mention hashtag" rel="nofollow noopener" target="_blank">#usb</a>

Lorenzo MinieroConsidering the Windows editor for my <a href="https://fosstodon.org/tags/DNAfx" class="mention hashtag" rel="nofollow noopener" target="_blank">#DNAfx</a> GiT Core won't run on neither Wine nor any VM, I've spent the past few days trying to reverse engineer its USB protocol, in order to write a basic editor for Linux of my own. It's been interesting so far to play with <a href="https://fosstodon.org/tags/libusb" class="mention hashtag" rel="nofollow noopener" target="_blank">#libusb</a> (I can already kinda talk to the device), especially coming from the perspective of a network developer, but I have some doubts on how <a href="https://fosstodon.org/tags/USB" class="mention hashtag" rel="nofollow noopener" target="_blank">#USB</a> communication works in general: is there anyone around here that can clarify a few points?

Orhun Parmaksız 👾Today I discovered a pretty cool utility for listing USB devices! 🔌🌸 **cyme**: A modern and cross-platform lsusb!🔥 Displays manufacturer, serial number, speed, current information (mA) and more!🦀 Written in Rust!⭐ GitHub: <a href="https://github.com/tuna-f1sh/cyme" rel="nofollow noopener" translate="no" target="_blank">https://github.com/tuna-f1sh/cyme</a><a href="https://fosstodon.org/tags/rustlang" class="mention hashtag" rel="nofollow noopener" target="_blank">#rustlang</a> <a href="https://fosstodon.org/tags/lsusb" class="mention hashtag" rel="nofollow noopener" target="_blank">#lsusb</a> <a href="https://fosstodon.org/tags/usb" class="mention hashtag" rel="nofollow noopener" target="_blank">#usb</a> <a href="https://fosstodon.org/tags/devices" class="mention hashtag" rel="nofollow noopener" target="_blank">#devices</a> <a href="https://fosstodon.org/tags/utility" class="mention hashtag" rel="nofollow noopener" target="_blank">#utility</a> <a href="https://fosstodon.org/tags/commandline" class="mention hashtag" rel="nofollow noopener" target="_blank">#commandline</a> <a href="https://fosstodon.org/tags/tool" class="mention hashtag" rel="nofollow noopener" target="_blank">#tool</a> <a href="https://fosstodon.org/tags/libusb" class="mention hashtag" rel="nofollow noopener" target="_blank">#libusb</a>

LeoDJCan anyone recommend a <a href="https://chaos.social/tags/framework" class="mention hashtag" rel="nofollow noopener" target="_blank">#framework</a> that allows relatively easy cross-platform (<a href="https://chaos.social/tags/Android" class="mention hashtag" rel="nofollow noopener" target="_blank">#Android</a>, <a href="https://chaos.social/tags/Windows" class="mention hashtag" rel="nofollow noopener" target="_blank">#Windows</a>, <a href="https://chaos.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#Linux</a>) development? Needs to be able to: - Open <a href="https://chaos.social/tags/USB" class="mention hashtag" rel="nofollow noopener" target="_blank">#USB</a> webcam stream - Call <a href="https://chaos.social/tags/ffmpeg" class="mention hashtag" rel="nofollow noopener" target="_blank">#ffmpeg</a> - Send USB vendor control transfers (or calls to <a href="https://chaos.social/tags/libusb" class="mention hashtag" rel="nofollow noopener" target="_blank">#libusb</a>) - GUI:BoostOK:I really don't want to write code two times (and dislike Android app dev), but recently realized that I'd really like for my upcoming <a href="https://chaos.social/tags/P2Pro" class="mention hashtag" rel="nofollow noopener" target="_blank">#P2Pro</a> viewer to run on Android too.But if there is no such thing, I'll stick to desktop only for now :/

Paul ‮etnomailgaTDay 2 of my posting adventures to finally figure out what is going on with my build of <a href="https://soylent.green/tags/libuhd" class="mention hashtag" rel="nofollow noopener" target="_blank">#libuhd</a> <a href="https://soylent.green/tags/libusb" class="mention hashtag" rel="nofollow noopener" target="_blank">#libusb</a> on <a href="https://soylent.green/tags/openbsd" class="mention hashtag" rel="nofollow noopener" target="_blank">#openbsd</a> :openbsd:<a href="https://sourceforge.net/p/libusb/mailman/message/37796867/" rel="nofollow noopener" target="_blank">https://sourceforge.net/p/libusb/mailman/message/37796867/</a>:boost_ok: boosts would be v helpful in case anyone has seen something like this before, esp from bsd folks or sdr folks <a href="https://soylent.green/tags/ham" class="mention hashtag" rel="nofollow noopener" target="_blank">#ham</a> <a href="https://soylent.green/tags/sdr" class="mention hashtag" rel="nofollow noopener" target="_blank">#sdr</a> <a href="https://soylent.green/tags/bsd" class="mention hashtag" rel="nofollow noopener" target="_blank">#bsd</a>

Paul ‮etnomailgaTif any of my :openbsd: friends have some time to devote to a mystery, I don't know <a href="https://soylent.green/tags/OpenBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#OpenBSD</a>'s USB stack / ugen well enough to reason through the logs, so far everyone I've reached out to haven't been able to point me in the direction of a smoking gun yet <a href="https://soylent.green/tags/bsd" class="mention hashtag" rel="nofollow noopener" target="_blank">#bsd</a> <a href="https://soylent.green/tags/libusb" class="mention hashtag" rel="nofollow noopener" target="_blank">#libusb</a> <a href="https://marc.info/?t=167993667800007&r=1&w=2" rel="nofollow noopener" target="_blank">https://marc.info/?t=167993667800007&r=1&w=2</a>

Brian SwetlandWith libusb_get_bus_number(), and libusb_get_port_numbers(), one can easily construct a path like /sys/bus/usb/devices/{BUS}-{PORTS} to access the string descriptors as "product", "manufacturer", and "serial" (if present). And /sys/bus/usb/devices/{BUS}-{PORTS}:{CONFIGNUM}-{INTERFACENUM} has "interface" for the interface string descriptor (if present).<a href="https://chaos.social/tags/projects" class="mention hashtag" rel="nofollow noopener" target="_blank">#projects</a> <a href="https://chaos.social/tags/xdebug" class="mention hashtag" rel="nofollow noopener" target="_blank">#xdebug</a> <a href="https://chaos.social/tags/libusb" class="mention hashtag" rel="nofollow noopener" target="_blank">#libusb</a> <a href="https://chaos.social/tags/workarounds" class="mention hashtag" rel="nofollow noopener" target="_blank">#workarounds</a>

Brian SwetlandAnnoying. libusb requires you to open a device before reading string descriptors (necessitating you have read/write permission because libusb only opens devices RW).On modern Linux (and I believe on Windows and OSX) this is not actually necessary and makes enumeration and reporting errors to users that much more complicated than need be. This feature has been discussed, but there has been no forward motion, it seems: <a href="https://github.com/libusb/libusb/issues/866" rel="nofollow noopener" target="_blank">https://github.com/libusb/libusb/issues/866</a><a href="https://chaos.social/tags/projects" class="mention hashtag" rel="nofollow noopener" target="_blank">#projects</a> <a href="https://chaos.social/tags/xdebug" class="mention hashtag" rel="nofollow noopener" target="_blank">#xdebug</a> <a href="https://chaos.social/tags/libusb" class="mention hashtag" rel="nofollow noopener" target="_blank">#libusb</a> <a href="https://chaos.social/tags/grumbles" class="mention hashtag" rel="nofollow noopener" target="_blank">#grumbles</a>

LeoDJYesterday I've learned what USB filter drivers are on Windows and that it's apparently pretty easy to install libusb0 as one. (Thanks <a href="https://chaos.social/@patagona" class="u-url mention" rel="nofollow noopener" target="_blank">@patagona</a>) Having done that, my initial plan worked on the second try. I can now send the command for switching the color palette, wohoo \o/I only needed to make sure that I send the USB control transfers after the video capture has already been started, otherwise the call to <a href="https://chaos.social/tags/libusb" class="mention hashtag" rel="nofollow noopener" target="_blank">#libusb</a> will just hang indefinitely for whatever reason.<a href="https://chaos.social/tags/P2Pro" class="mention hashtag" rel="nofollow noopener" target="_blank">#P2Pro</a> <a href="https://chaos.social/tags/reveng" class="mention hashtag" rel="nofollow noopener" target="_blank">#reveng</a>

katzenjensLissy beobachtet mich, ob ich beim coden nicht doch noch die Nerven verliere. Mich bei der Hitze in <a href="https://social.tchncs.de/tags/libusb" class="mention hashtag" rel="nofollow noopener" target="_blank">#libusb</a> einarbeiten zu wollen scheint eh eine bekloppte Idee zu sein. 🙄 <a href="https://social.tchncs.de/tags/caturday" class="mention hashtag" rel="nofollow noopener" target="_blank">#caturday</a> <a href="https://social.tchncs.de/tags/cats" class="mention hashtag" rel="nofollow noopener" target="_blank">#cats</a> <a href="https://social.tchncs.de/tags/katzen" class="mention hashtag" rel="nofollow noopener" target="_blank">#katzen</a>

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