[FEAT] Add support for Debian GNU/Hurd

[osalbahr]

Description

Debian GNU/Hurd 2025 Released With Completed 64-bit Support, Rust Ported.

Currently, this is what I get running cmake:

Unsupported platform: GNU

Motivation

It'd be nice to be able to run fastfetch on Debian GNU/Hurd.

Additional context

Here is a screenshot of uname -a and /etc/os-release:

[CarterLi]

Do you really use it? It's always easy to ask for something, but it's not easy to actually do it.

[osalbahr]

No, I don't use it. The implementation effort is probably not worth it tbh.

[yelninei]

Hi,

I have a port here : https://codeberg.org/Yelninei/fastfetch .

I have not tried it on the debian hurd but the basics work on both the i686 and x86_64 guix hurd.

It mostly involved adding a few #ifdefs in the right places. usually all the linux things also work on hurd but when the linux method gets linux specific (e.g. to support android) it gets tricky.
Notes

• Usages of PATH_MAX. This is undefined on Hurd and almost always wrong to use everywhere else. I worked around it by adding a compile_definition for now but ideally fastfetch would not use it.
• A difficult to navigate jungle of ifdefs for every platform to which this would contribute.
• i cant test the wm and other modules because xorg currently is not availble yet for the guix hurd.
• is "<sys/mount.h>" necessary in disk_linux.c?
• Something is weird with DT_DIR
• What to do with pid1?
• loadavg: I commented out the android part to avoid creating a new file but getloadavg would work as well
• netif: I copied and adapted the previous linux_netif and adjusted the path to /proc/route
• ffpackagesGetNix is used in packages_linux but is #ifdef'ed to linux and apple in the header.
• Initisystem is currently detected as guile but should be shepherd (also on linux)

[osalbahr]

Thx for letting me know of the Guix port. I just ran ./run.sh using your repo and got the following error:

/home/demo/git/fastfetch/src/detection/localip/localip_linux.c: In function 'ffDetectLocalIps':
/home/demo/git/fastfetch/src/detection/localip/localip_linux.c:398:18: error: 'AF_LINK' undeclared (first use in this function); did you mean 'AF_HYLINK'?
  398 |             case AF_LINK:
      |                  ^~~~~~~
      |                  AF_HYLINK
/home/demo/git/fastfetch/src/detection/localip/localip_linux.c:398:18: note: each undeclared identifier is reported only once for each function it appears in

Changing it to AF_HYLINK as suggested and now I can run fastfetch.

[CarterLi]

A difficult to navigate jungle of ifdefs for every platform to which this would contribute.

I don't get what you mean.

• is "<sys/mount.h>" necessary in disk_linux.c?

No.

• Something is weird with DT_DIR

What is weird?

• What to do with pid1?

It's init system.

• ffpackagesGetNix is used in packages_linux but is #ifdef'ed to linux and apple in the header

Nix supports also macOS. What's the problem?

[yelninei]

For AF_LINK debian seems to disable it because it does not work.
https://salsa.debian.org/glibc-team/glibc/-/blob/sid/debian/patches/hurd-i386/submitted-AF_LINK.diff

[yelninei]

A difficult to navigate jungle of ifdefs for every platform to which this would contribute.

I don't get what you mean.

Sometimes the _linux version is using linux/android specifics and sometimes it is used by every other unix-like with a lot of small adjustments.

• is "<sys/mount.h>" necessary in disk_linux.c?

No.

• Something is weird with DT_DIR

What is weird?

For prcesses_linux I had to disable the DT_DIR check otherwise it would report 0

• What to do with pid1?

It's init system.

Yes, but what to do. I am using reading /proc/1/stat for ffProcessGetBasicInfoLinux as there is no /proc/1/comm

• ffpackagesGetNix is used in packages_linux but is #ifdef'ed to linux and apple in the header

Nix supports also macOS. What's the problem?

The problem is when I reuse packages_linux for GNU (or something non linux/apple) there are errors.

[CarterLi]

The problem is when I reuse packages_linux for GNU (or something non linux/apple) there are errors.

Just add || defined(GNU) in the header?