Adam Thompson <[email protected]> wrote: > AFAICT, GNU RCS (v5.9.4, ca. 2015, examined) creates a temp file, > unlinks the target file, then renames the temp file. I beleve this > guarantees(-ish, modulo "special" filesystems including NFS and > FreeBSD's directory-SUID behaviour) that resulting file ownership = > euid.
mktemp and rename sound like reasonable. > The GNU docs mention the repo owner in passing a few times but do not > have a section describing multi-user operation. The documentation is irrelevant. It should focus on what the code does, why it seems to do it, and about whether the resulting behaviour is convenient. > I'm not sure which other implementations you'd be worried about All of them. > - I thought OpenBSD's RCS was the direct descendant of NetBSD's and > shares common lineage with the other *BSDs? The top of each source file claims otherwise. It is a rewrite. > All in all, it looks like RCS and its docs were written in the era > when UNIX machines were - more or less by universally - used by > multiple people, and you just had an innate sense of how multi-user > file ownership would work. Most of my UNIX machines now resemble > appliances, and exactly zero of them are multi-user in the classical > sense. Documentation is irrelevant.
