lib: 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

lib: 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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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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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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pidfile: add pidfile_signal

Differential Revision: https://reviews.freebsd.org/D34681

Add CAP_EVENT to pidfiles.

CAP_EVENT was omitted on pidfiles (in
pidfile_open()). There seems no reason why a process that creates
and writes a pidfile cannot monitor events on that file. This mod a

Add CAP_EVENT to pidfiles.

CAP_EVENT was omitted on pidfiles (in
pidfile_open()). There seems no reason why a process that creates
and writes a pidfile cannot monitor events on that file. This mod adds
the capability.

Reviewed by: cem@
MFC after: 2 weeks
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D25363

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MFHead @347527

Sponsored by: The FreeBSD Foundation

Use funlinkat in pidfile to ensure we are removing the right file.

MFHead@r345677

Fix pidfile_open(3) to handle relative paths with multiple components.

r322369's use of basename(3) was incorrect and worked by accident so
long as the pidfile path was absolute or consisted of a si

Fix pidfile_open(3) to handle relative paths with multiple components.

r322369's use of basename(3) was incorrect and worked by accident so
long as the pidfile path was absolute or consisted of a single
component. Fix the basename() usage and add a regression test.

Reported by: 0mp
Reviewed by: cem
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D19728

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lib: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
pr

lib: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified 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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MFhead@r322451

Merge ^/head r321383 through r322397.

Limit descriptors stored in the pidfh structure.

Reviewed by: markj, cem
Differential Revision: https://reviews.freebsd.org/D11741

Store directory descriptor in the pidfh structure and use unlinkat(2)
function instead of unlink(2).

Now when pidfile_remove() uses unlinkat(2) to remove the pidfile
it is safe to use this function

Store directory descriptor in the pidfh structure and use unlinkat(2)
function instead of unlink(2).

Now when pidfile_remove() uses unlinkat(2) to remove the pidfile
it is safe to use this function in capability mode.

Style fix: sort headers.

PR: 220524
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D11692

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libutil: minor spelling fixes.

Merge head r233826 through r256722.

IFC @256277

Approved by: ken (mentor)

IFC @ r255692

Comment out IA32_MISC_ENABLE MSR access - this doesn't exist on AMD.
Need to sort out how arch-specific MSRs will be handled.

Merge from head

IFC @ r255209

MFC

libutil: Use O_CLOEXEC for internal file descriptors from open().

IFC @253398

Merge fresh head.

sync from head