But userv requires code to be written specifically to work with userv, even for seemingly simple tasks as reading files. See 6.6 Error handling and input strea

But userv requires code to be written specifically to work with userv, even for seemingly simple tasks as reading files. See 6.6 Error handling and input streams (eg stdin) on https://www.chiark.greenend.org.uk/~ian/userv/spec.html/ch-notes.html#s-stdinerr https://www.chiark.greenend.org.uk/~ian/userv/spec.html/ch-n... systemd's run0 on the other hand doesn't require code to be written specifically to work with it.