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

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 current version of head.

Change all our own code to use st_*tim instead of st_*timespec.

Also remove some local patches to diff(1) which are now unneeded.

MFC r198175:

- If lstat()/stat() fails with an error other than ENOENT, don't ignore
the error and assume that the file doesn't exist. Touch could return
success with -c option even if the file

MFC r198175:

- If lstat()/stat() fails with an error other than ENOENT, don't ignore
the error and assume that the file doesn't exist. Touch could return
success with -c option even if the file existed and time was not set.
- If the first utimes_f() call fails with -A option, give up and don't
continue trying to set times to current time. [1]
- Set exit status to 1 when setting of timestamps fails for a directory
or symbolic link even though lstat()/stat() would succeed.
- Don't print bogus error message when rw() succeeds.

PR: bin/112213

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IFH@204581

MFC @199204

- If lstat()/stat() fails with an error other than ENOENT, don't ignore
the error and assume that the file doesn't exist. Touch could return
success with -c option even if the file existed and ti

- If lstat()/stat() fails with an error other than ENOENT, don't ignore
the error and assume that the file doesn't exist. Touch could return
success with -c option even if the file existed and time was not set.
- If the first utimes_f() call fails with -A option, give up and don't
continue trying to set times to current time. [1]
- Set exit status to 1 when setting of timestamps fails for a directory
or symbolic link even though lstat()/stat() would succeed.
- Don't print bogus error message when rw() succeeds.

PR: bin/112213
Submitted by: jilles [1]
Reviewed by: jilles
Approved by: trasz (mentor)

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Usage: print base name of program.

-A flag: respect the -a and -m flags.
imply the -c flag.

Requested in principle by: brian

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

MFC after: 2 weeks

Don't set time to current, if set to specific time fails

PR: 92577

ANSIify function definitions.
Add some constness to avoid some warnings.
Remove use register keyword.
Deal with missing/unneeded extern/prototypes.
Some minor type changes/casts to avoid warnings.

R

ANSIify function definitions.
Add some constness to avoid some warnings.
Remove use register keyword.
Deal with missing/unneeded extern/prototypes.
Some minor type changes/casts to avoid warnings.

Reviewed by: md5

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Replace various spelling with FALLTHROUGH which is lint()able

Remove local prototypes for main().

Handle directories correctly.

PR: 40801
MFC after: 5 days

remove __P

WARNS=2 is going to be the default, so don't specify it. Use __FBSDID().