sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remov

sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

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sys: Remove $FreeBSD$: one-line .c pattern

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

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

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sys/dev: further 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

sys/dev: further 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.

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Provide counter_warning(9) KPI which allows to issue limited number of
warnings for some kernel events, mostly intended for the use of
obsoleted or otherwise undersired interfaces.

This is an abstra

Provide counter_warning(9) KPI which allows to issue limited number of
warnings for some kernel events, mostly intended for the use of
obsoleted or otherwise undersired interfaces.

This is an abstracted and race-expelled code from compat pty driver.

Requested and reviewed by: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D7270

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pty(4): Use strlcpy to guarantee destination buffer isn't overrun

The devtoname() name is strcpyed into a small stack buffer. Sure, we always
expect the name to be ttyXX (or ptyXX). If that's the

pty(4): Use strlcpy to guarantee destination buffer isn't overrun

The devtoname() name is strcpyed into a small stack buffer. Sure, we always
expect the name to be ttyXX (or ptyXX). If that's the case, strlcpy() doesn't
hurt.

Reported by: Coverity
CID: 1006768
Sponsored by: EMC / Isilon Storage Division

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MfH @r295202

Expect to see panics in routing code at least now.

MFH

Sponsored by: The FreeBSD Foundation

Merge ^/head r294169 through r294598.

Remove printf only useful for debugging.

Requested by: bde
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks

MFH @r294567

MFH

Sponsored by: The FreeBSD Foundation

Merge ^/head r293686 through r293849.

Switch legacy pty clone handler to use make_dev_s(9). Add
MAKEDEV_CHECKNAME flag to the call, this is required to not panic on
race between the clone and destructing the closed master.

Reported by

Switch legacy pty clone handler to use make_dev_s(9). Add
MAKEDEV_CHECKNAME flag to the call, this is required to not panic on
race between the clone and destructing the closed master.

Reported by and discussed with: bde
Tested by: pho (as part of the larger patch)
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks

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Integrate from Head into ZFSD feature branch as of revision r224141.

IFC @ r223696 to pick up dfr's userboot

MFC

Fix whitespace inconsistencies in the TTY layer and its drivers owned by me.

Merge svn+ssh://svn.freebsd.org/base/head@218816

Finish r210923, 210926. Mark some devices as eternal.

MFC after: 2 weeks

Merge from head

- MFC from head@196987

Move ptmx into pty(4).

Now that pty(4) is a loadable kernel module, I'd better move /dev/ptmx
in there as well. This means that pty(4) now provides almost all
pseudo-terminal compatibility code. Thi

Move ptmx into pty(4).

Now that pty(4) is a loadable kernel module, I'd better move /dev/ptmx
in there as well. This means that pty(4) now provides almost all
pseudo-terminal compatibility code. This means it's very easy to test
whether applications use the proper library interfaces when allocating
pseudo-terminals (namely posix_openpt and openpty).

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Allow pty(4) to be loaded as a kld.

Unfortunately, the wrappers that are present in pts(4) don't have the
mechanics to allow pty(4) to be unloaded safely, so I'm forcing this kld
to return EBUSY. Th

Allow pty(4) to be loaded as a kld.

Unfortunately, the wrappers that are present in pts(4) don't have the
mechanics to allow pty(4) to be unloaded safely, so I'm forcing this kld
to return EBUSY. This also means we have to enable some extra code in
pts(4) unconditionally.

Proposed by: rwatson

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- MFC from head@196987