Hacker News: JoshMcguigan

New comment by JoshMcguigan in "Swapping GNU coreutils for uutils coreutils on Gentoo Linux"

JoshMcguigan — Thu, 20 Jun 2024 13:53:45 +0000

Thanks for reading so closely and providing great feedback!

You are totally right on problems 1 and 2 being swapped.

For problem #5, you caught me taking too large a logical leap and making some assumptions there. Turns out the issue is just that cowsay special cases directories called `bin` (and thus treats directories called `sbin` differently)[0].

I just pushed an update to the post correcting both of these.

[0]: https://github.com/cowsay-org/cowsay/blob/d8c459357cc2047235...

New comment by JoshMcguigan in "Swapping GNU coreutils for uutils coreutils on Gentoo Linux"

JoshMcguigan — Thu, 20 Jun 2024 13:24:35 +0000

Thanks for pointing out `package.provided`. It does look like it could be a reasonable way to do this, but I'm not sure how exactly I'd be able to atomically swap GNU coreutils for uutils coreutils using that method?

I think I'd need to add `sys-apps/coreutils` to `package.provided`, then install uutils coreutils while telling Portage to ignore file collisions (because I'd be overwriting GNU coreutils binaries). However, that would have hidden the fact that I would have also been overwriting binaries from other packages (for example `hostname`, which is provided by `sys-apps/net-tools` in Gentoo).

Swapping GNU coreutils for uutils coreutils on Gentoo Linux

JoshMcguigan — Thu, 20 Jun 2024 02:20:47 +0000

Article URL: https://www.joshmcguigan.com/blog/gentoo-uutils-coreutils/

Comments URL: https://news.ycombinator.com/item?id=40734285

Points: 89

# Comments: 128

New comment by JoshMcguigan in "Now you're thinking with relays"

JoshMcguigan — Thu, 02 Nov 2023 15:19:54 +0000

For anyone interested in trying out ladder logic, I run a web app that includes a ladder logic simulator in the browser. There is a small set of lessons too.

http://www.plcfiddle.com

Sorry it’s desktop only for now. I never got around to figuring out how to make the drag and drop interface work well on mobile screens, although I’d love to.

New comment by JoshMcguigan in "A surprising fact about ldd"

JoshMcguigan — Thu, 06 Jul 2023 02:35:39 +0000

I was using ldd to investigate how nix handles dynamic linking and I was seeing some output I didn't understand. Others were asking about this on stackoverflow[0] but I wasn't able to find any explanation. After a little digging I realized what I was missing: ldd doesn't run the dynamic linker requested by the program (in its elf headers), rather it uses the "standard" dynamic linker in your environment.

[0]: https://stackoverflow.com/questions/34428037/how-to-interpre...

A surprising fact about ldd

JoshMcguigan — Thu, 06 Jul 2023 02:32:42 +0000

Article URL: https://www.joshmcguigan.com/blog/ldd/

Comments URL: https://news.ycombinator.com/item?id=36610297

Points: 1

# Comments: 1

New comment by JoshMcguigan in "Rust on Espressif chips"

JoshMcguigan — Sat, 01 Jul 2023 18:20:11 +0000

“cargo run” does in fact flash the dev board. Cargo allows configuring a custom runner, which is what the embassy examples do [0].

[0]: https://github.com/embassy-rs/embassy/blob/main/examples/stm...

New comment by JoshMcguigan in "Show HN: I wrote a tool in Rust for tracking all allocations in a Linux process"

JoshMcguigan — Wed, 15 Feb 2023 16:22:59 +0000

Thanks for sharing! I built a similar tool (also in Rust) which allows tracing system and library calls, and could be used for this purpose. I wanted to expose the functionality both as a library and CLI, but for now I’ve only published documentation on using the CLI.

https://github.com/JoshMcguigan/backlight

New comment by JoshMcguigan in "If you're happy with OpenBSD, probably any computer is good enough"

JoshMcguigan — Mon, 06 Feb 2023 00:03:08 +0000

What part of SSH takes 6 minutes?

New comment by JoshMcguigan in "Internal pull-up resistors are insufficient for I2C"

JoshMcguigan — Sun, 05 Feb 2023 23:48:45 +0000

I was using I2C for the first time, as part of a brushess ESC project, and had to learn the hard way that internal (to the mcu) pull-up resistors would not work at any reasonable (for my needs) communication speed.

This post compares the performance of the circuit using the internal pull-up resistors against external 1kohm resistors, including plots showing the improved signal quality.

Internal pull-up resistors are insufficient for I2C

JoshMcguigan — Sun, 05 Feb 2023 23:45:42 +0000

Article URL: https://www.joshmcguigan.com/blog/internal-pull-up-resistor-i2c/

Comments URL: https://news.ycombinator.com/item?id=34671151

Points: 14

# Comments: 10

New comment by JoshMcguigan in "Julius: An open source re-implementation of Caesar III"

JoshMcguigan — Sat, 03 Dec 2022 18:26:24 +0000

Save game compatibility would be very useful for testing if a bug was reproducible in the original game.

New comment by JoshMcguigan in "Show HN: Tracking my local bus with a RaspberryPi"

JoshMcguigan — Fri, 04 Nov 2022 14:17:23 +0000

Thanks for sharing! In the first screenshot of CLI output, it seems to show three buses all being 1 minute out? Am I misreading that?

New comment by JoshMcguigan in "Time Till Open Source Alternative"

JoshMcguigan — Sun, 28 Aug 2022 06:05:35 +0000

I agree with you, but the article does address this point.

New comment by JoshMcguigan in "Rust should not have provided `unwrap`"

JoshMcguigan — Fri, 15 Jul 2022 17:15:27 +0000

You can replace this with a match statement to avoid the unwrap.

New comment by JoshMcguigan in "Popularity of Programming Languages on Arch Linux"

JoshMcguigan — Fri, 18 Feb 2022 04:53:52 +0000

Any ideas what caused the spike then drop of go packages?

New comment by JoshMcguigan in "How I cut GTA Online loading times by 70%"

JoshMcguigan — Sun, 28 Feb 2021 22:17:12 +0000

> Normally Luke would group the same functions together but since I don’t have debugging symbols I had to eyeball nearby addresses to guess if it’s the same place.

I really enjoyed this article, but I do have a question about this part. Why would a single function be listed at mutliple addresses?

New comment by JoshMcguigan in "Troubleshooting a Stuck Process"

JoshMcguigan — Sun, 28 Feb 2021 19:08:12 +0000

I wrote this blog post after spending some time troubleshooting a linux process which seemed to be getting stalled, to capture a few one-liners that I found to be really useful for gathering initial informatoin about the problem.

I'm no expert on these things, so I'd appreciate any feedback on these techniques, or other alternatives!

Troubleshooting a Stuck Process

JoshMcguigan — Sun, 28 Feb 2021 19:03:05 +0000

Article URL: https://www.joshmcguigan.com/blog/troubleshooting-stuck-process/

Comments URL: https://news.ycombinator.com/item?id=26296039

Points: 3

# Comments: 1

New comment by JoshMcguigan in "The Serverless Revolution Has Stalled"

JoshMcguigan — Tue, 13 Oct 2020 04:40:29 +0000

It’s like your VPS except without having the manage OS and NGINX updates. And probably higher availability if you are concerned about that.