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salute to Richard Stallman the great

Hello, I have a question. I want to know whether Zig language can be better than Rust or not, and why Rust has been getting so much hate for some time now, and what is your opinion about Zig or Rust for creating very bad malware?

"in 191 Lines of C" The lines: if (sym == ID) { x=new_node(VAR); x->val=id_name[0]-'a'; next_sym(); }

It make me laugh how new kids to Linux harp on about containers (less so admittedly now Docker is no longer new) yet folk were selling locked down “private” shell access on Unix machines back to the early/mid 1990s! Chroot on steroids as another commenter wrote.

i was thinking of achieving that with some kind of a buffer for the current tty and using clear to update it to the next one (instead of remembering cursor position)

The family of MCUs you choose depends mostly on the size of project you intend to do now in the future. Recommending an ARM controller is likely to be massive overkill and completely overwhelming for hobbyists and beginners. It's like buying an articulated truck to transport a parcel to the post office - yes, it will do it but it is big, expensive, complex and complete overkill. Arduino would be a much better choice for this target audience. I personally use PIC controllers and program in assembler for small hobby projects.

great video! How can I implement this in a system update script I made?

Super cool!

FYI: This guy has no idea what an RTOS is. Nothing he said about it is true. 🤣

for the love of christ never show your code publicly again

I'm wondering if the link in the description was changed or if the people complaining about it don't know how to copy and paste. Even cell phones allow you to copy and paste from descriptions so I can only assume it was altered. That said, it'd be cool if you took the TinyC code and refactored it. Use more modern idioms and maybe add some optimizations to it. Perhaps turn it into an actual compiler that generates either assembly or a binary object file ready to link.

it seems that all commands in the pipelime get executed at once. what happens when a command in the pipeline exits due to a syntax error? does stderr print to the parent shell directly? great code analysis btw.

Looks cool, maybe i'll make my own using a round robin sheduler, i'll see

Terrible code! All in s single main ugghhh… 😂 Also there are no spaces required before and after pipeline. So the example code is even flawed 😂

Great video with no wasted time, good stuff 👍

which color scheme is that?

Thanks for a very clear explanation. I wonder why all the "goto again" s are included rather than the usual style of using break and placing the switch in a do while loop controlled by a handled bool.

RTOS doesn't mean a basic OS, though they typically are. It means that they are designed to handle real-time constraints which is difficult to do on bloated OSes, hence why they tend to be stripped down, bare bones implementations.

thanks for this BLAZINGLY FAST and MEMORY SAFE shell, very cool

cd without arguments should drop you into the home directory

Its not R (real time), its not OS. Its just a program, where you moved all task executions into the interrupt handler. To make out of your "interrupt runner" a scheduler, you should at least schedule the tasks from main. Your timer interrupt is then just the producer of your ticks time base (e.g. 1ms per tick). And main() calls your cooperative "schedule()" function within its while loop. To make it a "cooperative real time scheduler", if such a thing exists, you would need to runtime validate the time constraints of each running task, to see if R is violated and then... do something drastic to inform the user (of the device). I recommend a 150dbA siren for that... And you would specify for each (periodic) task, not only its interval, but also its maximum allowed run time per call. To make it an OS, well - some OS indeed are only the scheduler. You could add inter-task communication facilities or something. Or a driver model... The PC version of my especially for this comment hacked up cooperative scheduler thing is around 200 lines + the application code of the demo with 5 cyclic tasks (another 100 lines). here, main() looks like this: int main (int argc, const char* argv[]) { HCOOP coop = CoopInitialize(5); if (0 != coop) { init_tasks(coop); int running = 1; while (running) { running = CoopSchedule(coop); milli_sleep(10*1000); } } CoopTerminate(coop); return 0; } The milli_sleep() is not for the embedded case, but even there, you might want to save power while nothing is running. (HALT instruction on some CPU and let the timer interrupt wake you up.) The scheduler just runs tasks, which need running according to the current tick-time. int CoopSchedule(HCOOP domain) { CoopDomain_t* coop = (CoopDomain_t*)domain; if (NULL != coop) { uint64_t now = atomic_load(&coop->ticks); for (size_t i = 0; i < coop->tasksEnd; i++) { if (now >= coop->tasks[i].next_due) { coop->tasks[i].next_due = now + coop->tasks[i].interval; if (TEST_FLAG(coop->tasks[i].flags, TASK_FLAG_ENABLED) && NULL != coop->tasks[i].body) { coop->currentTaskId = coop->tasks[i].id; coop->tasks[i].body(domain); } } } return coop->running; } return 0; } I use atomics, because my ticks are being incremented in an extra thread (kinda simulating the ISR of a timer). And just because I wanted to.

I would classify this channel the ‘The Joy of Programming’, it is like Bob Ross but with code. “Now let me just paint this happy little shell right here in my VIM. Don’t be afraid of that loop, it will keep you safe while you structure your -painting- program.”

Wow!

Nice…❤

Not sure if a minimalist scheduler running on a microcontroller qualifies as an operating system, but hey. It's kind of cute.

there is also Time namespace, he, is missing on video

I like the ESP32 because it's a SoC microcontroller! WiFi and Bluetooth on board is great, plus ESP-NOW! What I don't like about the ESP32 is that the ADC inputs work strangely!

Cool & interesting video! We need more like this !

from 6:55 to 6:58, you show us a list of topics. im interested in looking at the whole list, what's the source? great video by the way

Rust...the woke language.

These projects take my understanding of shells and OSs from “unfathomably complex millions of lines of code” to “quite easy if you’re ok with it not being the next Linux”.

rUsT

Very cool

is arch's sh not posix compliant? if [ $(($bar_count % $percent)) -lt 100 ]; then won't stop complaining about the %

avrdude..... gr8 naming right there

Excellent explanation!

I only understood line 26

ASCII stuff

Very cool but how is this actually different from just regular old embedded programming?

You shoulda just said I use Neovim at the beginning... sheesh

Are there any sort of performance benchmarks, or reasons that I wouldn't want to use a docker container compared to this technique? We often use containers to build against platforms and libraries that are not on the host machine.

I don't understand why there is no LISP like low-level programming language. If the syntax was a LISP, then the compiler would not have to worry about converting tokens into an AST, because who cares about that anyway? The job of the compiler is to produce portable or optimized code, not do re-invent wheels. Imagine a C like low-level systems programming language that forces their users to write in a LISP like syntax, so that the context of any number of operations and functions is crystal clear for the compiler (and unambiguous). The compilers would have a lot less complexity that way and can focus on stuff that makes them "magic" (all the implicit re-writes and transformations that makes code faster). Just my thoughts that were spontaneously popping in my head as I was listening to this video...

Very nice!

Pure gold! What a coincidence! Just what I needed

Really informative video! My only critique is your microphone makes it a little hard to hear your voice sometimes. The auto-generated subtitles help a lot, but if you could work on that for future videos that would be amazing. Your actual content and how you speak is great, keep it up!

Docker = chroot on steroods

Thank you sir

You cannot possibly call a simple scheduler like this a "real time operating system". This is nothing more than ready made boilerplate.

Can you provide a source for the tinyc code? Im afraid the link in the description doesnt work