[viraptor]

That's not a great summary of lzma. It was systems adding custom patch to ssh which used a systemd-related library which it didn't really need in the first place. It's a stack of issues that don't have much to do with systemd itself really.

But re. expanding the attack surface - unlikely. Systemd's primary purpose is to start processes with the right environment / permissions. systemd-run/run0 basically give you the tool to invoke that functionality with a terminal attached to it. That's smaller scope of extra code than sudo/doas deal with.

[metta2uall]

Isn't it a fault of systemd that libsystemd had a dependency on libxz? (because it implements too many things). It should have been possible to add the notification functionality using a tiny libsystemd-notify.

[viraptor]

It's not a fault. They needed xz for some functionality and didn't want to split that library into multiple pieces. That's just a choice.

But either way, you could always do notification in a few lines yourself (probably as many as you needed to link that library in the first place). I've done multiple 3-line "implementations" in Python and Ruby in the past and never linked it for example.