Remove $FreeBSD$: one-line .c pattern

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

m4: import patch from OpenBSD

Use waitpid()/EINTR idiom for the specific pid, rather than generic wait()

Patch by: deraadt@

Obtained from: OpenBSD

Import from OpenBSD: -E flag

Add -E flag (make warnings fatal), following the behavior of GNU m4 1.4.9+

Help and direction millert@ espie@ anton@ deraadt@

ok espie@

Obtained from: OpenBSD

various: general adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

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.

No functional change intended.

Use NULL instead of 0 for pointers.

fopen(3) will return NULL in case it cannot open the STREAM.

MFC after: 2 weeks.

Synchronize with OpenBSD

Obtained from: OpenBSD

Sync with OpenBSD
This brings:
- check for integer overflows in custom allocs
- fix potential integer overflows in memory allocation
- annotate regexp error messages with source string
- better error handling in mkstemp/unlink/fdopen logic

More -Wmissing-variable-declarations fixes.

In addition to adding missing `static' keywords:
- bin/dd: Pull in `extern.h' to guarantee consistency with source file.
- libexec/rpc.rusersd: Move shared globals into an extern.h.
- libexec/talkd: Move `debug' and `hostname' into extern.h.
- usr.bin/cksum: Put counters in extern.h, as they are used by ckdist/mtree.
- usr.bin/m4: Move `end_result' into extern.h.
- usr.sbin/services_mkdb: Move shared globals into an extern.h.

Synchronize with laster version of m4 from OpenBSD and NetBSD
This bring better compatibility with gnum4

Reviewed by: cognet
Approved by: cognet
Obtained from: OpenBSD, NetBSD

Mark global functions and/or variables in m4(1) static where possible.

This allows compilers and static analyzers to more thorough analysis.

Fix typos - remove duplicate "the".

PR: bin/154928
Submitted by: Eitan Adler <lists at eitanadler.com>
MFC after: 3 days

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.

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

Use NULL instead of 0 for the return value of fopen().

Approved by: re (kensmith)

Don't depend on NULL's expansion being a pointer, cast it before it is passed
to variadic functions.

Approved by: das (mentor)

Kill extraneous whitespace.

Functions declared as <type> <identifier>(<nil>) should be declared as
<type> <identifier>(<void-type>) in ANSI C.

Merge local changes again, against ANSIfied m4(1).

Import OpenBSD m4(1) as of April 26. Mostly ANSIfication changes.

Use %zu to print a size_t, not %u and definitely not %d.

Remove WARNS?=2, as GCC will usually throw a fit right now, and I'm not going
to mix WARNS and NO_WERROR.

Submitted by: fenner

Print a size_t as %u not %d.

Pointed out by: mike, des's tinderbox

Crank WARNS.

Cast sizeof() to (int), as it's being compared against an int, not a size_t.
If i is changed to a size_t, it means the logic must be slightly changed later
in the flow, where --i is checked to be >= 0. I am not sure I want to make a
logic change to account for clearing up a warning, when an aesthetic one will
keep from modifying the logic.

Other harmless casts, that I think I've made in the right directions.

Make gpbc() an inline function, rather than an obfuscated macro, make its
scratch space local, rather than global. The previous macro used a dirty
hack (logical AND in place of a conditional) which would lead GCC to throw
a fit (rightly so) as the logical check, as well as the incrementation of
a variable, were not used for anything.

const'ify a few places where gcc3 yells. xstrdup() some global consts in
places where we xstrdup() when not using consts, but tried to assign them
to non-consts before.

Don't use execv(2) if we don't have the kind of arguments it wants.

Reviewed by: asmodai obrien tjr
Submitted by: tjr (a gcc3 build log)

Add __FBSDID, this file was unmodified so it was missed in the initial sweep.

Import OpenBSD m4 as of today.