wsl: expose /run/WSL in the SkiffOS system

[clayauld]

The wslu utility doesn't seem to work as expected. The wslpath binary doesn't get installed and the WSL InteropServer appears broken.

[paralin]

For the wslu package we just run "make install" and the makefile provided by wslu does the installing.

It looks like wslpath was renamed to wslupath:

[paralin]

@clayauld It needed /run/WSL mounted into the skiff system, see https://github.com/skiffos/SkiffOS/pull/226

Please run the following:

rm -rf ./workspaces/default/build/skiff-init-*
git fetch
git checkout fix-wslu
git submodule update
make configure compile

... to force re-building skiff-init-squashfs.

[paralin]

@clayauld you'll also need to delete these for the Go update:

rm -rf ./workspaces/default/build/host-go-1*
rm -rf ./workspaces/default/host/usr/lib/go

[paralin]

@clayauld #226 should have fixed it - feel free to comment here if not & ill reopen.

[clayauld]

It appears that the fix doesn't properly mount /run/WSL -> /skiff-overlays/system/run/WSL as the log says...

Comparing this to another WSL distro...

[paralin]

Someone must mount over /run, I guess systemd. Will look into it

[paralin]

@clayauld Due to /etc/fstab containing a line mentioning /run systemd mounts a tmpfs to /run.

This must be hiding the bind mount made by skiff-init-squashfs.

[paralin]

@clayauld Let's try mounting the entire /run dir from the WSL environment and disable systemd run.mount

I did that on the fix-wslu branch: https://github.com/skiffos/SkiffOS/pull/227

As before we will need to rebuild skiff-init-squashfs:

rm -rf ./workspaces/default/build/skiff-init-*
git fetch
git checkout fix-wslu
git reset --hard origin/fix-wslu
git submodule update
make configure compile

[clayauld]

Hmmm.... Still seems broken.

[paralin]

@clayauld are you sure you're on the latest fix-wslu branch commit and have recompiled skiff init as described above?

The logs don't mention /run but they should, there's a line in the config saying to mount /run itself and it should at least show up in those logs there.

[clayauld]

Yep. You were right.

/run/WSL seems to be available now.

When I run the wslu commands I still get the error wslpath: command not found

I was looking at the source code for wslu and it still looks for the binary or script wslpath in the PATH. Based on another install of WSL I have running (Pengwin Linux), wslpath is a symlink to /init. I'm not sure if that is common across WSL distros, but I have found stale versions of re-implimentations of wslpath on Github. None of them seem to work as expected, however. I was thinking of just doing a manual install of one of those if they worked as expected, but no success so far.

I can do more digging later this weekend and test other WSL distros to see how they deal with this.

[paralin]

wslpath is a symlink to /init which means that /init as provided by microsoft implements wslpath if it is started with wslpath in $0

/init doesn't exist inside the skiffos chroot but I will try to find a way to get it in there.

https://github.com/nix-community/NixOS-WSL/pull/106/commits/df27a91ddee7637aa765ea0e295af7911b8bca09#diff-8e10ab0ac1a96c07ffb329c5c4bc2bbb271e7f2914f1b0ac59742ab68d58c6f7R65

[paralin]

@clayauld please try fix-wslpath branch with https://github.com/skiffos/SkiffOS/pull/229

You will need to rebuild skiff-init-squahfs again as described above (just delete it from build/ before make compile)

What I did was mount the original / to /mnt/wsl and then symlink wslpath to /mnt/wsl/init

[clayauld]

Okay That seems to have resolved the issues.

[paralin]

Great! Thanks for testing