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.

Fix up setgrent(3) to have a POSIX-compliant prototype.

Just like with freelocale(3), I haven't been able to find any piece of
code that actually makes use of this function's return value, both in
base and in ports. The reason for this is that FreeBSD seems to be the
only operating system to have such a prototype. This is why I'm deciding
to not use symbol versioning for this.

It does seem that the pw(8) utility depends on the function's typing and
already had a switch in place to toggle between the FreeBSD and POSIX
variant of this function. Clean this up by always expecting the POSIX
variant.

There is also a single port that has a couple of local declarations of
setgrent(3) that need to be patched up. This is in the process of being
fixed.

PR: 211394 (exp-run)

include: Remove checks for __BSD_VISIBLE where redundant with __XSI_VISIBLE
or __POSIX_VISIBLE.

Whenever <sys/cdefs.h> sets __BSD_VISIBLE to non-zero, it also sets
__POSIX_VISIBLE and __XSI_VISIBLE to the newest version supported.

No functional change is intended.

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: setgrent() is an XSI extension.

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

= 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

Use relatively new visibility primitives for conditionals. Document
unimplemented functions.

style(9): line up function names

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

Include <sys/_types.h>. This should have been part of the previous
revision.

o Implement <sys/_types.h>, a new header for storing types that are
MI, not required to be a fixed size, and used in multiple headers.
This will grow in time, as more things move here from <sys/types.h>
and <machine/ansi.h>.
o Add missing type definitions (uint16_t and uint32_t) to
<arpa/inet.h> and <netinet/in.h>.
o Reduce pollution in <sys/types.h> by using `#if _FOO_T_DECLARED'
widgets to avoid including <sys/stdint.h>.
o Add some missing type definitions to <unistd.h> and note the ones
that still need to be added.
o Make use of <sys/_types.h> primitives in <grp.h> and <sys/types.h>.

Reviewed by: bde

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.

Use a integral type that doesn't require <sys/types.h>. This
accomplishes the goal of actually making <grp.h> independent of other
headers for the definition of its types.

Pointy hat to: mike

Rather than include namespace pollution in <grp.h> in order to declare
`gid_t', use the canonical protection scheme to define a type in two or
more headers. This brings <grp.h> closer to POSIX.1-2001 conformance.

Per POSIX <grp.h> doesn't require <sys/types.h>.

Submitted by: ache

Backout rev.1.5 - it seems that it's posixly correct that the program
needs to include <sys/types.h> before <grp.h>.

Submitted by: fjoe, sheldonh
David Malone <dwmalone@maths.tcd.ie>

In rev.1.4 type of (group)->gr_gid was changes from (int) to (gid_t),
so that <sys/types.h> is now required. Add it, otherwise it breaks
some ports.

Submitted by: Joe Marcus Clarke <marcus@marcuscom.com>

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 proper type (gid_t) for (group)->gr_gid to be orthogonal
with uid_t usage and (user)->pw_uid.

PR: 3242

Back out all of yesterdays include file changes.

Make a lot of include-files self-contained. I excluded the patches changing
int's to gid_t and uid_t - should I commit these, too?

Closes PR misc/2625.

Submitted by: Julian Assange <proff@iq.org>

BSD 4.4 Lite Include Sources