Abstract sockets were added to Linux waaaaaaaaaaaay before dbus existed - they were already there in 2.4.0, which is as far back as the history I have goes. You

Abstract sockets were added to Linux waaaaaaaaaaaay before dbus existed - they were already there in 2.4.0, which is as far back as the history I have goes. You really can't blame the Freedesktop people for them. If your init daemon doesn't run on Linux there's no reason to care about supporting them, either. Write a library that implements sd_notify(), and just leave that bit out.