Seatd: Difference between revisions

Revision as of 15:50, 3 May 2025

Seatd is a seat management daemon, that does everything it needs to do. Nothing more, nothing less. Depends only on libc. Seat management takes care of mediating access to shared devices (graphics, input), without requiring the applications needing access to be root.

When using elogind, seatd is not required and viceversa. Don't add both to auto-start.

Installation

apk add seatd # install seatd rc-update add seatd # configure it to auto-start service seatd start # start it now adduser $USER seat # allow current user to access seatd

If you are already logged in as a $USER, you will need to relogin.

polkit can be used for authentication with seatd.

Configuration

Ensure that XDG_RUNTIME_DIR is set before starting your Wayland compositor.

@@ Line 12: / Line 12: @@
 If you are already logged in as a <code>$USER</code>, you will need to relogin.
+* [[polkit]] can be used for authentication with [[Polkit and seatd|seatd]].
 == Configuration ==
@@ Line 17: / Line 19: @@
 Ensure that [[XDG_RUNTIME_DIR]] is set before starting your Wayland compositor.
-== Seatd and polkit ==
+== See also ==
-{{pkg|polkit}} can be used for authentication with seatd if you use groups in the polkit rules. With seatd you are restricted to YES or NO rules.
-A sample polkit rule file {{Path|/etc/polkit-1/rules.d/50-my-custom-rules.rules}} which allow members of the "wheel" group to reboot without a password. This rule depends only on group membership which works with seatd can be as follows:{{Cat|/etc/polkit-1/rules.d/50-my-custom-rules.rules|<nowiki>
-    polkit.addRule(function(action, subject) {
-        if (action.id == "org.freedesktop.login1.reboot" &&
-            subject.isInGroup("wheel")) {
-            return polkit.Result.YES;
-        }
-    });
-</nowiki>}}
-[[elogind|Elogind]] is required for "subject.active" rules and no AUTH_ADMIN, since polkit agents need POLKIT_IS_SUBJECT. Given below is a sample polkit rule file {{Path|/etc/polkit-1/rules.d/51-require-active-session.rules}} which allow only active local sessions to suspend based on subject.active which requires [[Elogind]] can be as follows:{{Cat|/etc/polkit-1/rules.d/51-require-active-session.rules|<nowiki>
-    polkit.addRule(function(action, subject) {
-        if (action.id == "org.freedesktop.login1.suspend" &&
-            subject.active) {
-            return polkit.Result.YES;
-        } else if (action.id == "org.freedesktop.login1.suspend") {
-            return polkit.Result.NO; // Or polkit.Result.AUTH_ADMIN to prompt for password
-        }
-    });
-</nowiki>}}
-== See Also ==
 * [https://man.sr.ht/~kennylevinsen/seatd/ seatd documentation]