On Sun, Dec 26, 2021 at 3:03 PM beroal <m...@beroal.in.ua> wrote: > Hi. I have an autologin program which authenticates a user without asking > for a password and starts a child process executing a user shell (for > example, Bash, Xorg, or a Wayland compositor). > > This program is a systemd service. I discovered that systemd kills the > autologin program, but does not kill the child of the autologin program. As > I understand from the systemd documentation, systemd should kill both. >
Systemd doesn't kill *child* processes when stopping a service – it only kills processes found in the service's cgroup. As pam_systemd has intentionally moved your processes to a separate per-session .slice cgroup, they're no longer tied to the original .service's lifetime. (I'm not very familiar with Wayland's requirements, but does your autologin program do anything specific that the built-in [Service] PAMName= wouldn't do anyway?) -- Mantas Mikulėnas
