This happend to me right noww as I tried to write a gui task manager for the GNU/Linux OS
My first programming related memory is of the QBasic interpreter.
I had written some code I was quite happy with, but not saved it yet. As part of a subroutine for sound output, I quickly wrote a loop from 20 to 20000 to output a test signal over 1 second each with that frequency via the PC speaker and hit execute.
Realizing my mistake, It being MS-DOS and thus single-threaded, I couldn't Ctrl+C out of it without killing QBasic altogether and losing my code. I couldn't turn town the PC speaker.
I ended up closing various doors between the PC and me and waiting it out.
This is why VM snapshotting is so valuable.
My IDE is my real workstation, and it hosts a VM in which I can plop some code, run it, crash, revert and try again.
Try it again
Do you know the definition of insanity?
Do you know the definition of insanity?
do you know software developers?
But did you get the reference?
How are you crashing your system?! Crashing program sure, but the entire system?
Try it out on your own system.
:(){
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It's totally possible
Doesn't explain OPs task management example. And won't crash the kernel, just make things unresponsive
it didn't crash the kernel, it just killed every process that isn't run by the root user, which kind of feels like a crash
Ah, that definitely would feel like a crash. Sent kill signal to cgroup accidentally? Or just iterate over all processes and signal them all?
probably the later, but idk how, all I did was insert a string in the following command like this:
``Command::new("bash")
.arg("-c") .arg(format!("ps -aux | grep -i "{}" | awk '{{print $2}}' | xagrs kill -9", input)
.output()
.expect("error");``
I've tested the command and it worked flawlessly in the terminal, but I have no idea what I'm doing, since I'm new to rust and never worked with this library
There are rust libraries to send signals, might be better to use those rather than calling bash. eg. https://docs.rs/nix/latest/nix/sys/signal/index.html
I'm guessing if input was "", then it would sigkill all processes? Less confident, but some functions behave slightly differently in an interactive console vs a non interactive, maybe ps has a different format when used non interactively?
Aside, you want three backticks and a newline to get code formatting :)
thx, btw I figured it out:
I forgot to trimm the string, so it had a line break in it which lead to grep showing the processes from the term I put in + all processes that contain a space/linebreak and appearently all processes shown by ps aux contain some kind of space (makes sense, since there are spaces between the user, pid, etc) so yeah, I ended up trying to kill every process on the system, but it only killed the user processes, since I ran everything without sudo
rm -rf
Works for . current directory. Yay!
... also works for / system root. 🔥 Nay!
Does it? I thought / specifically was protected, and you needed to add --no-preserve-root.
That won't crash your kernel, and I was more curious about the OPs example. Task management is basically reading some files, and sending signals, it should be near impossible to crash the system.
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