this post was submitted on 29 Oct 2024
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    Terminating a process (lemmy.ml)
    submitted 1 month ago by [email protected] to c/linuxmemes
    98 comments fedilink hide all child comments
     

    Yes yes, I REALLY want to terminate that process and I am very sure about it too, ty.

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    [–] [email protected] 173 points 1 month ago (5 children)

    And as always with this meme: Both Windows and Linux can ask a process nicely to terminate or kill it outright. And the default for both is to ask nicely.

    [–] [email protected] 66 points 1 month ago

    Next, you'll tell me I shouldn't get all my news from memes!

    [–] [email protected] 32 points 1 month ago (1 children)

    Well, with linux you get the option of sending mixed signals through the use of varying count of guns. I find 9 to be highly effective.

    [–] [email protected] 16 points 1 month ago* (last edited 1 month ago) (2 children)

    on windows a process can get in a state so that it is impossible to make it go away, even with process explorer or process hacker. mostly this also involves the bugged software becoming unusable.

    I encounter such a situation from time to time. one way it could happen is if the USB controller has got in an invalid state, which one of my pendrives can semi-reliably reproduce. when that happens, any process attempting to deal with that device or its FS, even the built-in program to remove the drive letter, will stop working and hang as an unkillable process.

    [–] [email protected] 28 points 1 month ago (2 children)

    Linux has that issue too. A process in an uninterruptible blocking syscall stays until that syscall finishes, which can be never if something weird's going on.

    [–] [email protected] 3 points 1 month ago

    oh, that's good to know! iirc that's the same reason it happens on windows too

    [–] [email protected] 1 points 1 month ago

    oh, that's good to know! iirc that's the same reason it happens on windows too

    [–] [email protected] 13 points 1 month ago* (last edited 1 month ago) (2 children)

    I've seen that on Linux as well. Funnily enough also with faulty file systems. I think NFS with spotty wifi for one.

    Oh, and once with a dying RAID controller. That was a pain in the ass. At that point I swore to only ever do RAID in software.

    [–] [email protected] 3 points 1 month ago

    oh yeah now that you say, SMB/CIFS mounted share if connection is no more. when I experienced this, it was temporary though, because there's a timeout which is half (or double?) of the configurable reconnection timeout. but now that I think of it, I'm not sure if it made it unkillable.

    [–] greyfox 1 points 1 month ago

    Add a -f to your umount and you can clear up those blocked processes. Sometimes you need to do it multiple times (seems like it maybe only unblocks one stuck process at a time).

    When you mount your NFS share you can add the "soft" option which will let those stuck calls timeout on their own.

    [–] [email protected] 9 points 1 month ago (2 children)

    Because that's better for the software, Linux however kills it outright when it doesn't respond at all. Windows just... Waits. And you can't really hardkill the processes from the task manager. Or at last my last knowledge is that.

    [–] [email protected] 15 points 1 month ago (3 children)

    League of Legends captures and discards the ALT-F4 keystroke combination.

    Microsoft trusts app developers to use Microsoft's standards (such as terminating the process when a close message is received) and they shouldn't. App developers like Riot have taken advantage of this trust and tuned their apps to act differently than expected, and include code which makes the app minimize to the system tray instead, or force the user to answer questions ("Are you SURE you want to close?"), or do nothing at all.

    It should be punishable by death.

    [–] [email protected] 5 points 1 month ago* (last edited 1 month ago) (1 children)

    Linux programs can also capture signal calls. They usually only capture sigints so that they can close gracefully, but theoretically you could also capture a sigkill.

    [–] Gutek8134 4 points 1 month ago

    I mean, "are you sure" is useful... sometimes

    [–] [email protected] 7 points 1 month ago

    You can easily make a program unkillable (or to be more precise untermable) on Linux. Here's a simple bash script that will do that.

    #!/bin/bash                                                                                                     function finish {
  while true
  do                                                              
    echo "Can't kill me."                                   
    sleep 10                                        
  done                                            
}                                                                                                               trap finish EXIT                                        
trap finish TERM                                        
trap finish INT                                                                                                 

while true                                              
do                                                              
  echo "Still alive."                                     
  sleep 10                                        
done
    [–] [email protected] 5 points 1 month ago (1 children)

    Windows can kill a process outright.

    Hmmmm...

    [–] linearchaos 14 points 1 month ago

    Taskkill /f is reasonably close to sudo kill -9

    Hitting the X in Windows and hitting the X in Linux both cause the application to start a save yourself routine. From the OS standpoint they're not far off.

    The problem is we have a lot of confirmation bias in windows because every time we want to close an application that's not working, that save yourself call has to sit around for a hellaciously long time out followed by a telemetry call so that Microsoft can track that it happened.

    It's pretty rare that Linux apps don't just close.