Unless the documentation explicitly marks something as stable or as an ABI detail you can rely on the answer is NO.
On Fri, Jul 19, 2024 at 4:13 AM Carl Lei <m...@xecycle.info> wrote: > Hi all, > > Short version of my question is, my program connects to > /run/systemd/journal/stdout and dup2 to stderr; this socket needs that > 7-line preamble to actually work. But this seems a hidden internal > thing, so I wonder will this be kept stable? > Unless it is listed here https://systemd.io/PORTABILITY_AND_STABILITY/ The answer is no.