Get list of currently running processes

[noble cedar]

I need to get the list of all processes that are running now, I don't know if there is a library or built-in functionality

[frigid tide]

the sysinfo crate has the functions you need https://docs.rs/sysinfo/0.27.5/sysinfo/trait.SystemExt.html#tymethod.processes

[noble cedar]

I couldn't get it doing anything :/

I tried for 17 minutes straight since you answered...

I just don't understand it 😦

[frigid tide]

fn main() {
    use sysinfo::{Pid, ProcessExt, System, SystemExt};

    let s = System::new_all();
    for (pid, process) in s.processes() {
        println!("{} {}", pid, process.name());
    }
}

...
190 scsi_eh_0
907 nvidia-modeset/
201 scsi_tmf_5
46 kworker/7:0-events
169 irq/31-aerdrv
2113 xmonad-x86_64-l
4899 Web Content
842 kworker/5:1H-kblockd
197 scsi_tmf_3
1856 wpa_supplicant
183 kworker/8:2-events

just tried it on my computer

[noble cedar]

That looks a lot easier than I tried to do...

[frigid tide]

😅 its copy paste from that link above

[noble cedar]

[frigid tide]

i tried 😅

[noble cedar]

Thank you tho 👍

[frigid tide]

oh also you can limit the amount of data it loads by switching out the new_all

the new_all loads everything sysinfo can get from the system

[noble cedar]

I'm going to load everything I can

[frigid tide]

duplicates the entire system. um, wasn't expecting that /j

[noble cedar]

casually goes through all processes and kills them.

[frigid tide]

can the kernel kill itself if it's the one doing the killing

[noble cedar]

If you cut of your leg, where does it hurt... in your leg...?

[frigid tide]

fair point

[noble cedar]

Oh, also, do you know by any chance how I can repeat something with delay, but without freezing whole program?

[frigid tide]

is the program already async or just normal?

[noble cedar]

It's just born, it can choose its identity now

I think async would be great for my task tho

[frigid tide]

use std::{thread, time::Duration};
thread::spawn(move || {
    thread::sleep(Duration::from_millis(100));
    // do the thing
});

for the not async way

[noble cedar]

And for the async way?

If it's some 40 liner Im gonna

I just never worked with async stuff 😄

[frigid tide]

tokio::spawn(async {
    tokio::time::sleep(Duration::from_millis(100)).await;
    // do the thing
});

[noble cedar]

Tokio 🇯🇵 ????

[frigid tide]

https://tokio.rs/

the biggest rust async runtime

[noble cedar]

Cool!

[frigid tide]

there is also https://async.rs/ for a more minimal approach

[noble wyvern]

it won't be useful for reading the list of processes though

[frigid tide]

yeah ... we went to another question

[noble cedar]

It's not as much for reading list of processes as for managing them

[frigid tide]

if you do use async, the sysinfo call should be put in a https://docs.rs/tokio/latest/tokio/task/fn.spawn_blocking.html so it doesn't slow down other stuff

[noble wyvern]

that's what I meant

getting the process list isn't async by itself