Date: Sat, 6 Dec 2025 17:59:30 +0300 From: Artem Bunichev <tembun@bk.ru> To: Tom Hukins <tom@freebsd.org> Cc: freebsd-doc@freebsd.org Subject: Re: Adopting users(7) and groups(7) manpages from NetBSD Message-ID: <20251206175930.a017fb944e9ebe8d9853c5b8@bk.ru> In-Reply-To: <aTQ3dPXosPprEmP3@eborcom.com> References: <20251206143052.773a447321122e22959370af@bk.ru> <aTQ3dPXosPprEmP3@eborcom.com>
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On Sat, 6 Dec 2025 14:02:28 +0000 Tom Hukins <tom@freebsd.org> wrote: > On Sat, Dec 06, 2025 at 02:30:52PM +0300, Artem Bunichev wrote: > > I couldn't find the following groups in FreeBSD: wsrc, maildrop, > > postfix, named, _proxy (which in FreeBSD is called proxy), _timedc, > > _sdpd, _httpd, _mdnsd, _tcpdump, _tss, _gpio, _dhcpcd (called dhcp in > > FreeBSD), _rtadvd, etc... For most part, I guess these are missed > > because their programs are not in the FreeBSD base? > > Yes, ports/packages specify UIDs and GIDS as described in > https://docs.freebsd.org/en/books/porters-handbook/special/#users-and-groups > which your manual page should mention. > > Tom > Thanks Tom! I guess we should mention the place where {U,G}IDs are specified for ports, but provide a description only for those, which are in the base system only (/usr/src/etc/group)? By the way, do you know, is there a good way to determine which {U,G}IDs a particular program requires? As for now, I haven't find a one unified way for this. For example, I found via git-blame(1) and commit descriptions that groups `realtime` (GID 47) and `idletime` (GID 48) are used for mac_priority(4). It also described in rtprio(2) and mac_priority(4) manpages, but it's still not very easy to trace the program by GID in /usr/src/etc/group only. Or, I found that dhclient(8) uses group `_dhcp`: I found this line in /usr/src/sbin/dhclient/dhclient.c: `if ((pw = getpwnam("_dhcp")) == NULL)`. I tried to search for getpwnam(3) usage in sources for other programs, it does give some clues, but not very much. And as I can see, string "_dhcp" used as is, without any variable or #define, so I guess there is no really strict policy for this matter. So far I didn't find anything related in Makefiles either. Long story short, for now, I'm collecting info for each group in a very personal way so to speak, but it would be nice to make this process easier.
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