methods use va_list in a manner that is directly related to the public API.
This makes it much easier to write dynamic nsswitch backends for getgrent(3).
Per my proposal on tech-userlevel.
Implement getgrgid_r() and getgrnam_r() APIs per the POSIX 1003.1, 2004 Ed.
These aren't fully reentrant or threadsafe yet, because the compat stuff
currently uses non-reentrant data sources (getnetgrent(3), getgrent(3)),
and there is probably some locking to be improved in the backends.
This will be fixed in the near future.
We also need to add _SC_GETGR_R_SIZE_MAX to sysconf(3).
by the application, all NetBSD interfaces are made visible, even
if some other feature-test macro (like _POSIX_C_SOURCE) is defined.
<sys/featuretest.h> defined _NETBSD_SOURCE if none of _ANSI_SOURCE,
_POSIX_C_SOURCE and _XOPEN_SOURCE is defined, so as to preserve
existing behaviour.
This has two major advantages:
+ Programs that require non-POSIX facilities but define _POSIX_C_SOURCE
can trivially be overruled by putting -D_NETBSD_SOURCE in their CFLAGS.
+ It makes most of the #ifs simpler, in that they're all now ORs of the
various macros, rather than having checks for (!defined(_ANSI_SOURCE) ||
!defined(_POSIX_C_SOURCE) || !defined(_XOPEN_SOURCE)) all over the place.
I've tried not to change the semantics of the headers in any case where
_NETBSD_SOURCE wasn't defined, but there were some places where the
current semantics were clearly mad, and retaining them was harder than
correcting them. In particular, I've mostly normalised things so that
_ANSI_SOURCE gets you the smallest set of stuff, then _POSIX_C_SOURCE,
_XOPEN_SOURCE and _NETBSD_SOURCE in that order.
Tested by building for vax, encouraged by thorpej, and uncontested in
tech-userlevel for a week.
user_from_uid(3) and uid_from_user(3) use to lookup user information.
- Implement pwcache_groupdb(3), which changes the routines that
group_from_gid(3) and gid_from_group(3) use to lookup group information.
- Ensure that private functions in pwcache.c are declared static
- Use strlcpy(3) instead of strncpy(3)
change since our setgrent() allways succeeded.
Removed prototype for obsolete function setgrfile(), added prototype for
setgroupent().
Added _XOPEN_SOURCE to conditionals in case someone wants to compile
something in an strict X/Open environment.
