usr.bin: 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 pe

usr.bin: 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

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Remove $FreeBSD$: one-line nroff pattern

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

touch.1: Update to conform to POSIX 2004

POSIX borrowed the "double leap second" bug from C89. Double leap seconds can
never happen. This mistake was present in at least POSIX 1997 and fixed by
PO

touch.1: Update to conform to POSIX 2004

POSIX borrowed the "double leap second" bug from C89. Double leap seconds can
never happen. This mistake was present in at least POSIX 1997 and fixed by
POSIX 2004. I can't find a copy of 2001 online to determine if the bug was
present in that revision.

While here, remove duplicate language between -d and -t. A few other minor
enhancements and an igor (lint) bugfix.

Further reading:

2018 POSIX (documents -d):
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/touch.html

2004 POSIX (documents SS from 0-60):
http://pubs.opengroup.org/onlinepubs/009695399/utilities/touch.html

1997 POSIX/SUSv2 (historical interest, 0-61):
http://pubs.opengroup.org/onlinepubs/007908799/xcu/touch.html

More on this subject (start at "Unix system time and the POSIX standard")
https://www.ucolick.org/~sla/leapsecs/onlinebib.html

And: https://marc.info/?l=openbsd-tech&m=92682843416159&w=2

Reported by: Vishal Sahu <vsahu AT isilon.com>
Sponsored by: Dell EMC Isilon

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Merge ^/head r314420 through r314481.

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is

Renumber copyright clause 4

Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by: Jan Schaumann <jschauma@stevens.edu>
Pull Request: https://github.com/freebsd/freebsd/pull/96

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Merge sync of head

MFH: r278968-r280640

Sponsored by: The FreeBSD Foundation

Merge r278538 through r280226.

Merge from head

Merge ^/head r279759 through r279892.

touch(1): Xref utimensat(2) instead of utimes(2).

Sync from head

Merge head r236710 through r238467.

IFC @238412.

IFC @ r238370

touch: Add the -d option from POSIX.1-2008.

This is much like -t but with a different format which is ISO8601-like and
allows fractions of a second.

The precision is limited to microseconds because

touch: Add the -d option from POSIX.1-2008.

This is much like -t but with a different format which is ISO8601-like and
allows fractions of a second.

The precision is limited to microseconds because of utimes() and friends,
even though stat() returns nanoseconds.

MFC after: 10 days

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MFC

IFC @ r234692

sys/amd64/include/cpufunc.h
sys/amd64/include/fpu.h
sys/amd64/amd64/fpu.c
sys/amd64/vmm/vmm.c

- Add API to allow vmm FPU state init/save/restore.

FP stuff discussed with: kib

Merge head r232686 through r233825 into projects/pf/head.

Remove trailing whitespace per mdoc lint warning

Disussed with: gavin
No objection from: doc
Approved by: joel
MFC after: 3 days

IFC @231845

Sponsored by: Cisco Systems, Inc.

Remove useless and potentially dangerous rw() function which tries to
update access and modification times by reading and writing the file.
chmod(2) in rw() doesn't help because utimes(2) allow owner

Remove useless and potentially dangerous rw() function which tries to
update access and modification times by reading and writing the file.
chmod(2) in rw() doesn't help because utimes(2) allow owner and the
super-user to change times. Using just utimes(2) should be sufficient.

The -f option becomes no-op.

Reviewed by: jilles

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Remove the advertising clause from UCB copyrighted files in usr.bin. This
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $F

Remove the advertising clause from UCB copyrighted files in usr.bin. This
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with: imp, rwatson

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Update to match revision 1.23 of touch.c.
Clarify some details.

Add -A flag to adjust existing time stamps.
Print name by which program was started in usage() message.

MFC after: 2 weeks