Linux

48181 readers

968 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.
No misinformation
No NSFW content
No hate speech, bigotry, etc

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 5 years ago

MODERATORS

nooter692@lemmy.ml

AgreeableLandscape@lemmy.ml

MarcellusDrum@lemmy.ml

cypherpunks@lemmy.ml

cyclohexane@lemmy.ml

d3Xt3r@lemmy.nz

Desiable shutdown for users (lemmy.world)

submitted 1 month ago by user_naa@lemmy.world to c/linux@lemmy.ml

11 comments fedilink hide all child comments

Hello! Halt on Linux is disabled for average user by default. It will try to request sudo/root password and if fails returns:

sasha@fedora:~$ systemctl halt
Call to Halt failed: Access denied

How can I make same behavior for poweroff action? I know it is possible somehow via PolicyKit rulle

you are viewing a single comment's thread
view the rest of the comments

[–] progandy@feddit.org 8 points 1 month ago* (last edited 1 month ago) (1 children)

The relevant polkit policies should be defined here: https://github.com/systemd/systemd/blob/main/src/login/org.freedesktop.login1.policy

Disabling is done with some rules like this: https://bbs.archlinux.org/viewtopic.php?id=152565

polkit.addRule(function(action, subject) {
  if (action.id.indexOf("org.freedesktop.login1.power-off") == 0) {
    return polkit.Result.AUTH_ADMIN;
  }
});

Some other examples: https://gist.github.com/grawity/3886114

[–] user_naa@lemmy.world 2 points 1 month ago* (last edited 1 month ago) (1 children)

Thank you, it works! But I got weird behavior:

User sddm also cannot execute poweroff (it is ok) but if I press shutdown button in sddm it will poweroff (not ok).
If I press shut down in KDE Plasma I will get black screen and no sddm (I can restart it with systemctl restart sddm from tty and it will work again) How can I fix this bugs?

[–] progandy@feddit.org 1 points 1 month ago (1 children)

Sorry, I have no idea.

[–] user_naa@lemmy.world 1 points 4 weeks ago

SDDM main process is running as root and ignores all policies. So only way is modifying SDDM source code(