Fabrice does a great job at building these self-contained pieces of software which often grow to have lives of their own. As a lesser known example, JSLinux's terminal emulator was forked a few times and is now known as xterm.js, which has become the predominant web embeddable terminal emulator.
This all comes full circle, because now I'm building a true successor to JSLinux that's way faster because I've natively compiled the kernel/userspace to wasm, and of course I'm using xterm.js for the terminal emulation.
If you like buggy demos that probably shouldn't be shared yet, you should check out https://linux.tombl.dev, but note that it's currently just a busybox shell and nothing else, so I hope you're good with `echo *` instead of `ls`.
attempted to munmap
------------[ cut here ]------------
WARNING: CPU: 3 PID: 36 at kernel/exit.c:812 0x00000000
CPU: 3 PID: 36 Comm: sh Not tainted 6.1.132 #
Stack:
at vmlinux.o.__warn (https://linux.tombl.dev/dist/vmlinux-NLTKI6YG.wasm:wasm-function[278]:0x17655)
at vmlinux.o.warn_slowpath_fmt (https://linux.tombl.dev/dist/vmlinux-NLTKI6YG.wasm:wasm-function[279]:0x1772b)
at vmlinux.o.do_exit (https://linux.tombl.dev/dist/vmlinux-NLTKI6YG.wasm:wasm-function[329]:0x1985e)
at vmlinux.o.task_entry_inner (https://linux.tombl.dev/dist/vmlinux-NLTKI6YG.wasm:wasm-function[154]:0x12249)
at vmlinux.o.task_entry (https://linux.tombl.dev/dist/vmlinux-NLTKI6YG.wasm:wasm-function[153]:0x12155)
at self.onmessage (https://linux.tombl.dev/dist/worker-MHWHWELT.js:151:53)
---[ end trace 0000000000000000 ]---
I'm effectively lying to the kernel about the environment it's executing in, and trying to convince it that it's running on the kind of hardware it expects, when in reality it's running inside a very different environment.
Since I map guest threads 1:1 to host threads in JS, and architecture-specific code manages the loading/unloading of programs, the exec syscall is exercising these lies in a way that they're not currently equipped to handle.
What I'm currently doing is improving those lies to the point where exec stops noticing they're lies and just starts functioning as expected.
I got that with echo * which you suggested to use :)
I opened that on my Android Phone and half expected it not to boot at all. But it does. I have no idea about the state of WASM n stuff, but apparently, it's much more eadvanced than I anticipated. Mind blown.
This brings back memories. I haven't looked at it in a while, but I'm glad to see the fork[1] of my fork[2] from 12 years ago is still thriving. Looks like it's been mostly rewritten. Probably for the better.
Awesome, I suppose it's more energy efficient then jslinux and can be run on iOS, it might be a good alternative for A-Shell or iSH.
I tried it on my a MacBook, but the keyboard input doesn't register.
Thanks for pointing this out, I've deployed a fix. One of my goals for the project is to create a useful computing environment on top of any arbitrary locked down platform, so I'd love to turn it into an iOS app at some point.
This all comes full circle, because now I'm building a true successor to JSLinux that's way faster because I've natively compiled the kernel/userspace to wasm, and of course I'm using xterm.js for the terminal emulation.
If you like buggy demos that probably shouldn't be shared yet, you should check out https://linux.tombl.dev, but note that it's currently just a busybox shell and nothing else, so I hope you're good with `echo *` instead of `ls`.