There's a long standing request to extend the output of dmidecode to something that would be machine-readable. Something like an XML or JSON-based format. Unfortunately this can't be implemented right now because the output of dmidecode is generated by open-coded printfs as the DMI table is being parsed, with no intermediate structures nor temporary buffers.
While implementing a machine-parseable output is out of scope for a single hack week, let's remember that even the longest journey starts with a single footstep. I would like to try and rewrite the 5200 lines of code of dmidecode in such a way that printing the output would be somewhat separated from parsing the DMI table and done by a limited set of dedicated functions. Alternative output formats could later hook into such functions.
This project is part of:
Hack Week 19
Activity
Comments
-
almost 6 years ago by bmwiedemann | Reply
I think there are tools parsing output of dmidecode: ohai and salt at least. Probably more. hwinfo?
-
over 5 years ago by jdelvare | Reply
hwinfo has its own DMI table decoder, it does not rely on dmidecode.
I didn't know about ohai (I don't even know what it is) and salt. The output of dmidecode is plain text currently, it can be parsed if you are motivated enough, just you have to write your own parser and hope that the output format will never change in a way that will break your parser. I can understand why people would prefer a more structured output format.
-
-
-
over 5 years ago by jdelvare | Reply
Yesterday I posted the patch set which gets rid of all open-coded printfs.
Similar Projects
Add a machine-readable output to dmidecode by jdelvare
Description
There have been repeated requests for a machine-friendly dmidecode output over the last decade. During Hack Week 19, 5 years ago, I prepared the code to support alternative output formats, but didn't have the time to go further. Last year, Jiri Hnidek from Red Hat Linux posted a proof-of-concept implementation to add JSON output support. This is a fairly large pull request which needs to be carefully reviewed and tested.
Goals
Review Jiri's work and provide constructive feedback. Merge the code if acceptable. Evaluate the costs and benefits of using a library such as json-c.
Smart lighting with Pico 2 by jmodak
Description
I am trying to create a smart-lighting project with a Raspberry Pi Pico that reacts to a movie's visuals and audio that involves combining two distinct functions: ambient screen lighting(visual response) and sound-reactive lighting(audio response)
Goals
- Visuals: Capturing the screen's colour requires an external device to analyse screen content and send colour data to the MCU via serial communication.
- Audio: A sound sensor module connected directly to the Pico that can detect sound volume.
- Pico 2W: The MCU receives data fro, both inputs and controls an LED strip.
Resources
- Raspberry Pi Pico 2 W
- RGB LED strip
- Sound detecting sensor
- Power supply
- breadboard and wires
pudc - A PID 1 process that barks to the internet by mssola
Description
As a fun exercise in order to dig deeper into the Linux kernel, its interfaces, the RISC-V architecture, and all the dragons in between; I'm building a blog site cooked like this:
- The backend is written in a mixture of C and RISC-V assembly.
- The backend is actually PID1 (for real, not within a container).
- We poll and parse incoming HTTP requests ourselves.
- The frontend is a mere HTML page with htmx.
The project is meant to be Linux-specific, so I'm going to use io_uring, pidfs, namespaces, and Linux-specific features in order to drive all of this.
I'm open for suggestions and so on, but this is meant to be a solo project, as this is more of a learning exercise for me than anything else.
Goals
- Have a better understanding of different Linux features from user space down to the kernel internals.
- Most importantly: have fun.
Resources
Port OTPClient to GTK >= 4.18 by pstivanin
Project Description
OTPClient is currently using GTK3 and cannot easily be ported to GTK4. Since GTK4 came out, there have been quite some big changes. Also, there are now some new deprecation that will take effect with GTK5 (and are active starting from 4.10 as warnings), so I need to think ahead and port OTPClient without using any of those deprecated features.
Goal for this Hackweek
- fix the last 3 opened issues (https://github.com/paolostivanin/OTPClient/issues/402, https://github.com/paolostivanin/OTPClient/issues/404, https://github.com/paolostivanin/OTPClient/issues/406) and release a new version
- continue the rewrite from where we left last year
- if possible, finally close this 6 years old issue: https://github.com/paolostivanin/OTPClient/issues/123
Add a machine-readable output to dmidecode by jdelvare
Description
There have been repeated requests for a machine-friendly dmidecode output over the last decade. During Hack Week 19, 5 years ago, I prepared the code to support alternative output formats, but didn't have the time to go further. Last year, Jiri Hnidek from Red Hat Linux posted a proof-of-concept implementation to add JSON output support. This is a fairly large pull request which needs to be carefully reviewed and tested.
Goals
Review Jiri's work and provide constructive feedback. Merge the code if acceptable. Evaluate the costs and benefits of using a library such as json-c.
Improve the picotm Transaction Manager by tdz
Picotm is a system-level transaction manager. It provides transactional semantics to low-level C operations, such as
- memory access,
- modifying data structures,
- (some) file I/O, and
- common interfaces from the C Standard Library and POSIX.
Picotm also handles error detection and recovery for all it's functionality. It's fully modular, so new functionality can be added.
For the Hackweek, I want to dedicate some time to picotm. I want to finish some of the refactoring work that I have been working on. If there's time left, I'd like to investigate two-phase commits and how to support them in picotm.
Picotm is available at http://picotm.org/.