lib: 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

libc: Purge unneeded cdefs.h

These sys/cdefs.h are not needed. Purge them. They are mostly left-over
from the $FreeBSD$ removal. A few in libc are still required for macros
that cdefs.h defines. Keep those.

Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D42385

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

General 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.

Revert r300385 and r300624 which was false positive
reported by cppcheck.

dup_ncp() tries to allocate a buffer of MAXNETCONFIGLINE
as tmp, which is then assigned to p->nc_netid via strcpy,
so the free(p->nc_netid) would have correctly released
the memory in case nc_lookups() fails, therefore, the
allerged leak never existed.

MFC after: 3 days

libc: provide some bounds-checking through reallocarray(3).

reallocarray(3) is a non portable extension that originated in OpenBSD.
Given that it is already in FreeBSD's libc it is useful for the cases
where reallocation involves a multiplication.

MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D9955

Fix up r300385

I accidentally glossed over the fact that tmp is manipulated via strchr, so
if we tried to free `tmp` after r300385, it would have crashed.

Create a separate pointer (tmp2) to track the original allocation of `tmp`,
and free `tmp2` if `p->nc_lookups` can't be malloced

MFC after: 4 days
X-MFC with: r300385
Reported by: Coverity
CID: 1356026
Sponsored by: EMC / Isilon Storage Division

Don't leak `tmp` if `p->nc_lookups` can't be malloced

MFC after: 1 week
Reported by: cppcheck
Sponsored by: EMC / Isilon Storage Division

libc: spelling fixes.

Mostly on comments.

Remove unnecessary `if (x)` tests before calling `free(x)`; free(3)
already employs this check

MFC after: 2 weeks
Sponsored by: EMC / Isilon Storage Division

Use ANSI C prototypes. Eliminates -Wold-style-definition warnings.

Replace Sun RPC license in TI-RPC library with a 3-clause BSD license,
with the explicit permission of Sun Microsystems in 2009.

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

MFC 204950,205020:
Use thr_once() with once_t controls to initialize various thread_key_t
objects used to provide per-thread storage in the RPC code. Almost all
of these used double-checking with a dedicated mutex (tsd_lock) to do this
before. However, that is not always safe with more relaxed memory orders.
There were also other bugs, such as one in __rpc_createrr() that caused a
new key to be allocated each time __rpc_createrr() was invoked.

Use thr_once() with once_t controls to initialize various thread_key_t
objects used to provide per-thread storage in the RPC code. Almost all
of these used double-checking with a dedicated mutex (tsd_lock) to do this
before. However, that is not always safe with more relaxed memory orders.
There were also other bugs, such as one in __rpc_createrr() that caused a
new key to be allocated each time __rpc_createrr() was invoked.

PR: threads/144558
Reported by: Sam Robb samrobb of averesystems com (key leak)
MFC after: 1 week

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.

MFC revs 199781,199782,199784,199785,199786:

Eliminate dead stores.

In __mbsconv(), if prec was zero, nconv could have been used
uninitialized. Initialize it to a safe value so that there's no
chance of returning an error if stack garbage happens to be equal to
(size_t)-1 or (size_t)-2.

In svc_raw_reply(), don't leave stat uninitialized if the MSG_ACCEPTED
&& SUCCESS case succeeds. The stack garbage might be zero.

In clnt_raw_create(), avoid minor race condition initializing the
file-scope variable clntraw_private.

Found by: Clang static analyzer

Eliminate more dead stores.

Found by: Clang static analyzer
MFC after: 7 days

Lock around access to nc_file and netconfig_info ("ni"). The RPC
part of libc is still not thread safe but this would at least
reduce the problems we have.

PR: threads/118544
Submitted by: Changming Sun <snnn119 gmail com>
MFC after: 2 weeks

Remove a warning which is supposed to have been removed on 20030301.

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

Fix some improper handling of malloc failures

PR: bin/83344 , kern/81987
Reviewed by: alfred
Approved by: re (kensmith)
MFC after: 1 week

o Remove duplicate includes.

Obtained from: Slava Semushin via NetBSD

Sync with NetBSD rev. 1.15

Coverity CID 2275: Avoid memory leak on error.

MFC after: 1 month

Try to bring some sanity to the SCM ID's.
+ spell LIBC_SCCS consistently
+ enable builds with LIBC_SCCS defined to not syntax error
+ minor SCM reformatting to try to have some consistency

Make NULL a (void*)0 whereever possible, and fix the warnings(-Werror)
that this provokes. "Wherever possible" means "In the kernel OR NOT
C++" (implying C).

There are places where (void *) pointers are not valid, such as for
function pointers, but in the special case of (void *)0, agreement
settles on it being OK.

Most of the fixes were NULL where an integer zero was needed; many
of the fixes were NULL where ascii <nul> ('\0') was needed, and a
few were just "other".

Tested on: i386 sparc64

Eliminate 61 warnings emitted at WARNS=2 (leaving 53 to go).
Only warnings that could be fixed without changing the generated object
code and without restructuring the source code have been handled.

Reviewed by: /sbin/md5

Fix signed/unsigned comparison warnings. Fix spelling error in
comment.

NetBSD Rev. 1.9 and 1.7

Reviewed by: phk
Obtained from: NetBSD

Change the name for the local unix-socket based protocol
from "unix" back to "local". Add some compat stuff so both
ways work for some time.

Reviewed by: phk
Approved by: imp (UPDATING)
Requested by: iedowse, lukem@netbsd.org

Fix the style of the SCM ID's.
I believe have made all of libc .c's as consistent as possible.

Remove __P() usage.

Fix some very broken code in __nc_error() that implements per-thread
`nc_error' variables. Move the nc_lock mutex from mt_misc.c to a
static variable within this function, since it is only used here.

Add a new getnetconfigent() error code `NC_NOTFOUND' to report the
case where the specified netid was not found. Set nc_error in all
error cases in getnetconfigent() so that the error messages returned
by nc_(s)perror are always meaningful.

Add a terminating \n to the output of nc_perror() to match both
our manpage and other implementations of this function.

Reviewed by: deischen, alfred, Martin Blapp <mb@imp.ch>

Move the #includes of reentrant.h to after the `#include "namespace.h"',
so that the underscored versions of the pthread functions get
declared. This removes around 300 lines of 'implicit declaration
of XXX' warnings from the output of a libc build with -Wall.

Reviewed by: Martin Blapp <mb@imp.ch>, alfred

const'ify

Bring in a hybrid of SunSoft's transport-independent RPC (TI-RPC) and
associated changes that had to happen to make this possible as well as
bugs fixed along the way.

Bring in required TLI library routines to support this.

Since we don't support TLI we've essentially copied what NetBSD
has done, adding a thin layer to emulate direct the TLI calls
into BSD socket calls.

This is mostly from Sun's tirpc release that was made in 1994,
however some fixes were backported from the 1999 release (supposedly
only made available after this porting effort was underway).

The submitter has agreed to continue on and bring us up to the
1999 release.

Several key features are introduced with this update:
Client calls are thread safe. (1999 code has server side thread
safe)
Updated, a more modern interface.

Many userland updates were done to bring the code up to par with
the recent RPC API.

There is an update to the pthreads library, a function
pthread_main_np() was added to emulate a function of Sun's threads
library.

While we're at it, bring in NetBSD's lockd, it's been far too
long of a wait.

New rpcbind(8) replaces portmap(8) (supporting communication over
an authenticated Unix-domain socket, and by default only allowing
set and unset requests over that channel). It's much more secure
than the old portmapper.

Umount(8), mountd(8), mount_nfs(8), nfsd(8) have also been upgraded
to support TI-RPC and to support IPV6.

Umount(8) is also fixed to unmount pathnames longer than 80 chars,
which are currently truncated by the Kernel statfs structure.

Submitted by: Martin Blapp <mb@imp.ch>
Manpage review: ru
Secure RPC implemented by: wpaul