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drmorrI literally never remember how to use strace, and have to use it so infrequently that I don't build that knowledge, so whenever I need to actually strace something I just read <a href="https://social.jvns.ca/@b0rk" class="u-url mention" rel="nofollow noopener" target="_blank">@b0rk</a>'s strace zine, which is hecking amazing.<a href="https://jvns.ca/strace-zine-v3.pdf" rel="nofollow noopener" translate="no" target="_blank">https://jvns.ca/strace-zine-v3.pdf</a><a href="https://hachyderm.io/tags/linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#linux</a> <a href="https://hachyderm.io/tags/strace" class="mention hashtag" rel="nofollow noopener" target="_blank">#strace</a> <a href="https://hachyderm.io/tags/debugging" class="mention hashtag" rel="nofollow noopener" target="_blank">#debugging</a>

Simon TathamIf you run a <a href="https://hachyderm.io/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#Linux</a> program in <a href="https://hachyderm.io/tags/strace" class="mention hashtag" rel="nofollow noopener" target="_blank">#strace</a>, usually the start of the log shows it trying to load a ton of shared libraries, and for each one, trying the same file name in all your LD_LIBRARY_PATH directories until it finds it. So you mostly see file-open operations _failing_, with ENOENT.To a novice strace reader, it looks as if something has already gone horribly wrong! But it hasn't – this is all normal, and as expected. Each of those ENOENT is technically "an error", but not a _bad_ error, because ld.so just moves on to the next in its big list of things to try, and one works in the end.Errors happen _all the time_ in the guts of a computer system, and most of them are not even interesting – just business as usual. The event an end user thinks of as "an error" is the case where the program _doesn't_ have a fallback plan. Those are often outnumbered by the cases where it does!

Stewart RussellTIL that a trivial Python3 OpenCV program (open an image, attempt to display it in a window) on a Raspberry Pi tries to open over 2800 shared libraries(EDIT: more like nearly 1400, 'cos strace opens the symbolic link and the library ... but still)<a href="https://xoxo.zone/tags/python" class="mention hashtag" rel="nofollow noopener" target="_blank">#python</a> <a href="https://xoxo.zone/tags/OpenCV" class="mention hashtag" rel="nofollow noopener" target="_blank">#OpenCV</a> <a href="https://xoxo.zone/tags/strace" class="mention hashtag" rel="nofollow noopener" target="_blank">#strace</a> <a href="https://xoxo.zone/tags/RaspberryPi" class="mention hashtag" rel="nofollow noopener" target="_blank">#RaspberryPi</a> <a href="https://xoxo.zone/tags/NotLookingForAdvice" class="mention hashtag" rel="nofollow noopener" target="_blank">#NotLookingForAdvice</a>

Ron BowesProcess injection shenanigans are dear to my heart - it's one of the first things I ever learned in security.Inspired by an Akamai blog last month, this blog digs into techniques to tinker with other processes on Linux, and show you how to write a little debugger in C!<a href="https://www.labs.greynoise.io/grimoire/2025-01-28-process-injection/" rel="nofollow noopener" translate="no" target="_blank">https://www.labs.greynoise.io/grimoire/2025-01-28-process-injection/</a><a href="https://infosec.exchange/tags/linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#linux</a> <a href="https://infosec.exchange/tags/reversing" class="mention hashtag" rel="nofollow noopener" target="_blank">#reversing</a> <a href="https://infosec.exchange/tags/strace" class="mention hashtag" rel="nofollow noopener" target="_blank">#strace</a> <a href="https://infosec.exchange/tags/ptrace" class="mention hashtag" rel="nofollow noopener" target="_blank">#ptrace</a> <a href="https://infosec.exchange/tags/gdb" class="mention hashtag" rel="nofollow noopener" target="_blank">#gdb</a>

Some Bits: Nelson's LinkblogStratoshark: Computer debugging tool: like wireshark, but for system calls instead of network packets <a href="https://stratoshark.org/" rel="nofollow noopener" translate="no" target="_blank">https://stratoshark.org/</a> <a href="https://tech.lgbt/tags/via" class="mention hashtag" rel="nofollow noopener" target="_blank">#via</a>:hackernews <a href="https://tech.lgbt/tags/wireshark" class="mention hashtag" rel="nofollow noopener" target="_blank">#wireshark</a> <a href="https://tech.lgbt/tags/debugging" class="mention hashtag" rel="nofollow noopener" target="_blank">#debugging</a> <a href="https://tech.lgbt/tags/syscall" class="mention hashtag" rel="nofollow noopener" target="_blank">#syscall</a> <a href="https://tech.lgbt/tags/strace" class="mention hashtag" rel="nofollow noopener" target="_blank">#strace</a> <a href="https://tech.lgbt/tags/devops" class="mention hashtag" rel="nofollow noopener" target="_blank">#devops</a> <a href="https://tech.lgbt/tags/linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#linux</a> #+

Linux MagazineFrom the Linux Update newsletter: <a href="https://det.social/@hgesser" class="u-url mention" rel="nofollow noopener" target="_blank">@hgesser</a> shows you how to monitor and isolate unknown applications to safeguard your system with the strace analysis tool and the Firejail sandbox <a href="https://www.linux-magazine.com/Issues/2024/281/strace-and-Firejail" rel="nofollow noopener" translate="no" target="_blank">https://www.linux-magazine.com/Issues/2024/281/strace-and-Firejail</a> <a href="https://fosstodon.org/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#Linux</a> <a href="https://fosstodon.org/tags/applications" class="mention hashtag" rel="nofollow noopener" target="_blank">#applications</a> <a href="https://fosstodon.org/tags/strace" class="mention hashtag" rel="nofollow noopener" target="_blank">#strace</a> <a href="https://fosstodon.org/tags/Firejail" class="mention hashtag" rel="nofollow noopener" target="_blank">#Firejail</a> <a href="https://fosstodon.org/tags/applications" class="mention hashtag" rel="nofollow noopener" target="_blank">#applications</a> <a href="https://fosstodon.org/tags/OpenSource" class="mention hashtag" rel="nofollow noopener" target="_blank">#OpenSource</a>

Detlev ZundelIt has taken me some time to diagnose, but with the help of <a href="https://hostsharing.coop/tags/strace" class="mention hashtag" rel="nofollow noopener" target="_blank">#strace</a> I now know that ffmpeg is blocked on writing its progress report to the terminal.Switching to the terminal unblocks the process and things continue.Plain old <a href="https://hostsharing.coop/tags/xterm" class="mention hashtag" rel="nofollow noopener" target="_blank">#xterm</a> does not have this problem, but <a href="https://hostsharing.coop/tags/gnome" class="mention hashtag" rel="nofollow noopener" target="_blank">#gnome</a> Terminal does. Looking over the issues I do not see something similar, but I would have expected that more people would see such a problem?I am on Debian Trixie by the way, so I am using Gnome Terminal 3.51.90.2/2

Karsten SchmidtActually made an entire SDF type face, incl. declarative shape syntax to define characters (there're only lines & circular arcs)...<a href="https://mastodon.thi.ng/tags/GenerativeArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#GenerativeArt</a> <a href="https://mastodon.thi.ng/tags/SDF" class="mention hashtag" rel="nofollow noopener" target="_blank">#SDF</a> <a href="https://mastodon.thi.ng/tags/SphereTracing" class="mention hashtag" rel="nofollow noopener" target="_blank">#SphereTracing</a> <a href="https://mastodon.thi.ng/tags/Agents" class="mention hashtag" rel="nofollow noopener" target="_blank">#Agents</a> <a href="https://mastodon.thi.ng/tags/Boids" class="mention hashtag" rel="nofollow noopener" target="_blank">#Boids</a> <a href="https://mastodon.thi.ng/tags/Particles" class="mention hashtag" rel="nofollow noopener" target="_blank">#Particles</a> <a href="https://mastodon.thi.ng/tags/STRACE" class="mention hashtag" rel="nofollow noopener" target="_blank">#STRACE</a>5/x

Karsten Schmidt<a href="https://mastodon.thi.ng/tags/GenerativeArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#GenerativeArt</a> <a href="https://mastodon.thi.ng/tags/SDF" class="mention hashtag" rel="nofollow noopener" target="_blank">#SDF</a> <a href="https://mastodon.thi.ng/tags/SphereTracing" class="mention hashtag" rel="nofollow noopener" target="_blank">#SphereTracing</a> <a href="https://mastodon.thi.ng/tags/Agents" class="mention hashtag" rel="nofollow noopener" target="_blank">#Agents</a> <a href="https://mastodon.thi.ng/tags/Boids" class="mention hashtag" rel="nofollow noopener" target="_blank">#Boids</a> <a href="https://mastodon.thi.ng/tags/Particles" class="mention hashtag" rel="nofollow noopener" target="_blank">#Particles</a> <a href="https://mastodon.thi.ng/tags/STRACE" class="mention hashtag" rel="nofollow noopener" target="_blank">#STRACE</a>4/x

Karsten SchmidtGraphite version...<a href="https://mastodon.thi.ng/tags/GenerativeArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#GenerativeArt</a> <a href="https://mastodon.thi.ng/tags/SDF" class="mention hashtag" rel="nofollow noopener" target="_blank">#SDF</a> <a href="https://mastodon.thi.ng/tags/SphereTracing" class="mention hashtag" rel="nofollow noopener" target="_blank">#SphereTracing</a> <a href="https://mastodon.thi.ng/tags/Agents" class="mention hashtag" rel="nofollow noopener" target="_blank">#Agents</a> <a href="https://mastodon.thi.ng/tags/Boids" class="mention hashtag" rel="nofollow noopener" target="_blank">#Boids</a> <a href="https://mastodon.thi.ng/tags/Particles" class="mention hashtag" rel="nofollow noopener" target="_blank">#Particles</a> <a href="https://mastodon.thi.ng/tags/STRACE" class="mention hashtag" rel="nofollow noopener" target="_blank">#STRACE</a>3/x

Karsten SchmidtShort animation excerpt (the overall aesthetic of tens of thousands of moving fine lines/circles is always a total killer for video compression...)<a href="https://mastodon.thi.ng/tags/GenerativeArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#GenerativeArt</a> <a href="https://mastodon.thi.ng/tags/LightArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#LightArt</a> <a href="https://mastodon.thi.ng/tags/SDF" class="mention hashtag" rel="nofollow noopener" target="_blank">#SDF</a> <a href="https://mastodon.thi.ng/tags/SphereTracing" class="mention hashtag" rel="nofollow noopener" target="_blank">#SphereTracing</a> <a href="https://mastodon.thi.ng/tags/Agents" class="mention hashtag" rel="nofollow noopener" target="_blank">#Agents</a> <a href="https://mastodon.thi.ng/tags/Boids" class="mention hashtag" rel="nofollow noopener" target="_blank">#Boids</a> <a href="https://mastodon.thi.ng/tags/STRACE" class="mention hashtag" rel="nofollow noopener" target="_blank">#STRACE</a>2/x

Karsten SchmidtNote to ADHD brain: Get your act together and finish work on S-TRACE, one of maaany unfinished projects started last year... A mini thread of some WIPs...This thought was triggered by <a href="https://mastodon.gamedev.place/@meuns" class="u-url mention" rel="nofollow noopener" target="_blank">@meuns</a>'s post about Radiance Cascades: <a href="https://mastodon.gamedev.place/@meuns/111489830458139216" rel="nofollow noopener" translate="no" target="_blank">https://mastodon.gamedev.place/@meuns/111489830458139216</a><a href="https://mastodon.thi.ng/tags/GenerativeArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#GenerativeArt</a> <a href="https://mastodon.thi.ng/tags/LightArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#LightArt</a> <a href="https://mastodon.thi.ng/tags/SDF" class="mention hashtag" rel="nofollow noopener" target="_blank">#SDF</a> <a href="https://mastodon.thi.ng/tags/SphereTracing" class="mention hashtag" rel="nofollow noopener" target="_blank">#SphereTracing</a> <a href="https://mastodon.thi.ng/tags/Agents" class="mention hashtag" rel="nofollow noopener" target="_blank">#Agents</a> <a href="https://mastodon.thi.ng/tags/Boids" class="mention hashtag" rel="nofollow noopener" target="_blank">#Boids</a> <a href="https://mastodon.thi.ng/tags/STRACE" class="mention hashtag" rel="nofollow noopener" target="_blank">#STRACE</a>1/x

drmorrWell I just resorted to strace because I can't get libreoffice to give me any logs for the life of me.strace did not help.<a href="https://hachyderm.io/tags/libreoffice" class="mention hashtag" rel="nofollow noopener" target="_blank">#libreoffice</a> <a href="https://hachyderm.io/tags/strace" class="mention hashtag" rel="nofollow noopener" target="_blank">#strace</a> <a href="https://hachyderm.io/tags/linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#linux</a>

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