include: Remove ancient SCCS tags.

Remove ancient SCCS tags from the tree, automated scripting, with two
minor fixup to keep things compiling. All the common forms in the tree
were removed with a perl script.

Sponsored by: Netflix

Remove $FreeBSD$: one-line .h pattern

Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/

include: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

Remove the Berkeley clause 3's.
Add a few $FreeBSD$

Namespace: endpwent, getpwent, and setpwent are XSI extensions.

- Import the HEAD csup code which is the basis for the cvsmode work.

Correct a typo in the definition of _PW_VERSION_MASK. This macro is
currently unused other than as documentation.

Reported by: Stefan Farfeleder <stefan@fafoe.narf.at>

Revert the definitions of _PW_KEY* to their previous values. There is
at least one consumer outside of libc and pwd_mkdb.
Adjust the versioning in libc and pwd_mkdb accordingly.

named was the application affected, and that fact was first
Reported by: Zherdev Anatoly <tolyar@mx.ru>

Sponsored by: DARPA, Network Associates Laboratories

= Implement thread-safe versions of the getpwent(3) and getgrent(3)
family of functions using the new nsdispatch(3) core. Remove
arbitrary size limits when using the thread-safe versions.

= Re-implement the traditional getpwent(3)/getgrent(3) functions on
top of the thread-safe versions.

= Update the on-disk format of the hashed version of the passwd(5)
databases to allow for versioned entries. The legacy version is
`3'. (Don't ask.)

= Add support for version `4' entries in the passwd(5) database.
Entries in this format are identical to version 3 entries except
that all integers are stored as 32-bit integers in network byte
order (big endian).

= pwd_mkdb is updated to generate both version 3 and version 4
entries.

Sponsored by: DARPA, Network Associates Laboratories

o Merge <machine/ansi.h> and <machine/types.h> into a new header
called <machine/_types.h>.
o <machine/ansi.h> will continue to live so it can define MD clock
macros, which are only MD because of gratuitous differences between
architectures.
o Change all headers to make use of this. This mainly involves
changing:
#ifdef _BSD_FOO_T_
typedef _BSD_FOO_T_ foo_t;
#undef _BSD_FOO_T_
#endif
to:
#ifndef _FOO_T_DECLARED
typedef __foo_t foo_t;
#define _FOO_T_DECLARED
#endif

Concept by: bde
Reviewed by: jake, obrien

o Remove include of <sys/types.h>, it adds too much pollution;
instead, add typedefs of only gid_t, time_t, and uid_t.
o Remove an unneeded conditional that hid macros that are in the
implementation namespace and therefore don't need to be hidden when
_POSIX_SOURCE is defined.
o Adjust some conditionals for compatibility with X/Open and POSIX.
o Note missing functions getpwnam_r() and getpwuid_r().

(ab)use unused bits in the pw_fields member of struct passwd to record
the source of the data contained in the structure.

Sponsored by: DARPA, NAI Labs

Breath deep and take __P out of the system include files.

# This appears to not break X11, but I'm having problems compiling the
# glide part of the server with or without this patch, so I can't tell
# for sure.

Make user_from_uid and group_from_gid return const char *, just like
NetBSD. Update man page to reflect this.

Move user_from_uid to pwd.h
Move group_from_gid to grp.h
Remove from stdlib.h
Make the prototypes match the code
Fix rm and mv to include new files.

NetBSD has these defined in those files, and others too that I've not
done.

Approved by: terminal room kabal
Reviewed by: jhb, phk

Use the correct type for uid and gid in struct passwd. Document it.

XOpen says the void setpwent(void) is correct. Also call setpassent(0)
instead of duplicating code, albeit trivial (inspired by NetBSD).

PR: 5524

NIS cleanups and fixes, the next generation.

getnetgrent.c:

- Catch one bogon that snuck by: in _listmatch(), check for '\0'
rather than '\n'; strings returned from yp_match() are terminated
with a nul, not a newline.

getpwent.c:

- Rip out all of the +inclusion/-exclusion stuff from before and
replace it with something a little less grotty. The main problem
with the old mechanism was that it wasted many cycles processing
NIS entries even after it already knew they were to be exlcuded
(or not included, depending on your pointof view). The highlights
of these changes include:

o Uses an in-memory hash database table to keep track of all the
-@netgroup, -user, and -@group exclusions.

o Tries harder to duplicate the behavior normally obtained when using
NIS inclusions/exclusions on a flat /etc/passwd file (meaning things
come out in much the same order).

o Uses seperate methods for handling getpwent() and getpwnam()/getpwuid()
operations instead of trying to do everything with one general
function, which didn't work as well as I thought it would.

o Uses both getnetgrent() and innetgr() to try to save time where
possible.

o Use only one special token in the local password database
(_PW_KEYYPBYNUM) instead of seperate tokens to mark + and -
entries (and stop using the counter tokens too). If this new
token doesn't exist, the code will make due with the standard
_PW_KEYBYNUM token in order to support older databases that
won't have the new token in them.

All this is an attempt to make this stuff work better in environments
with large NIS passwd databases.

Add a couple of extra #defines for special keys to be embedded in the
password databases:

#define _PW_KEYPLUSBYNUM '5' /* special +@netgroup entries */
#define _PW_KEYMINUSBYNUM '6' /* special -@netgroup entries */
#define _PW_KEYPLUSCNT '7' /* number of +@netgroup entries */
#define _PW_KEYMINUSCNT '8' /* number of -@netgroup entries */

This is to help getpwent.c in libc build the +@netgroup/-@netgroup
caches.

Add a new field to the passwd structure, indicating which of the fields have
something in them, and which ones were left blank. This will be used
for YP support in a few minutes, and for user login classes if anyone cares
to implement them.

Add defines to allow pwd_mkdb to build databases in a specified
directory - removing the need to hardcode /etc into pwd_mkdb

BSD 4.4 Lite Include Sources