Remove copyright strings ifdef'd out

We've ifdef'd out the copyright strings for some time now. Go ahead and
remove the ifdefs. Plus whatever other detritis was left over from other
recent removals.

Remove copyright strings ifdef'd out

We've ifdef'd out the copyright strings for some time now. Go ahead and
remove the ifdefs. Plus whatever other detritis was left over from other
recent removals. These copyright strings are present in the comments and
are largely from CSRG's attempt at adding their copyright to every
binary file (which modern interpretations of the license doesn't
require).

Sponsored by: Netflix

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sbin: 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

sbin: 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 .c pattern

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

dmesg: detect wrapped msgbuf on the kernel side and if so, skip first line

Since 59f256ec35d3 dmesg(8) will always skip first line of the message
buffer, cause it might be incomplete. The problem i

dmesg: detect wrapped msgbuf on the kernel side and if so, skip first line

Since 59f256ec35d3 dmesg(8) will always skip first line of the message
buffer, cause it might be incomplete. The problem is that in most cases
it is complete, valid and contains the "---<<BOOT>>---" marker. This
skip can be disabled with '-a', but that would also unhide all non-kernel
messages. Move this functionality from dmesg(8) to kernel, since kernel
actually knows if wrap has happened or not.

The main motivation for the change is not actually the value of the
"---<<BOOT>>---" marker. The problem breaks unit tests, that clear
message buffer, perform a test and then check the message buffer for
a result. Example of such test is sys/kern/sonewconn_overflow.

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Merge ^/head r325999 through r326131.

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 f

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.

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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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Catch up with HEAD (r280229-r284686).

Merge sync of head

Merge from head

MFH: r280643-r281852

Sponsored by: The FreeBSD Foundation

dmesg: accommodate message buffer growth between the sysctl calls

Allocate 12.5% extra space to avoid ENOMEM when the message buffer
is growing steadily.

Reported by: Steve Wahl <steve_wahl@dell.co

dmesg: accommodate message buffer growth between the sysctl calls

Allocate 12.5% extra space to avoid ENOMEM when the message buffer
is growing steadily.

Reported by: Steve Wahl <steve_wahl@dell.com> (and tested)
Approved by: kib (mentor)
Obtained from: Dell Inc.
MFC after: 1 week

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MFH: r278968-r280640

Sponsored by: The FreeBSD Foundation

Merge r278538 through r280226.

Merge from head

Fix minor fallout from sysctl strings being nulterminated now. The dmesg
code can read the buffer via sysctl or from a core file. In the core file
case there will be no nulterm, and the code copes

Fix minor fallout from sysctl strings being nulterminated now. The dmesg
code can read the buffer via sysctl or from a core file. In the core file
case there will be no nulterm, and the code copes with that, but now in the
sysctl case there is a nulterm (there didn't used to be). The least
disruptive way to restore the old behavior (and eliminate a spurious '\000'
at the end of the output) is to remove the nulterm (by decrementing the
buffer length) in the sysctl case.

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Merge from head

IFC @ r254014

IFC @253398

Merge fresh head.

Move the check whether the clear flag is set. This has 2 advantages

- When operating on a core file (-M) and -c is specified we don't clear
the message buffer of the running system.
- If we don't

Move the check whether the clear flag is set. This has 2 advantages

- When operating on a core file (-M) and -c is specified we don't clear
the message buffer of the running system.
- If we don't have permission to clear the buffer print the error message
only. That's what Linux does in this case, where this feature was ported
from, and it ensures that the error message doesn't get lost in the noise.

Discussed with: antoine, cognet
Approved by: cognet

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Add support for 'dmesg -c' which clears the dmesg buffer after it has
been printed. This provides compatibility with other *nix systems
(including Linux).

While here use stdbool booleans for 'all'.

Add support for 'dmesg -c' which clears the dmesg buffer after it has
been printed. This provides compatibility with other *nix systems
(including Linux).

While here use stdbool booleans for 'all'.

PR: bin/178295
Submitted by: Levent Serinol <lserinol@gmail.com>
Reviewed by: will

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IFC @230489 (pending review).

IFC @ r227804

Pull in the virtio drivers from head.