stat(1): Fix grammar error in stat.c

Event: Advanced UNIX Programming Course (Fall’23) at NTHU
Pull Request: https://github.com/freebsd/freebsd-src/pull/1014

Remove $FreeBSD$: one-line .c pattern

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

spdx: The BSD-2-Clause-NetBSD identifier is obsolete, drop -NetBSD

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

spdx: The BSD-2-Clause-NetBSD identifier is obsolete, drop -NetBSD

The SPDX folks have obsoleted the BSD-2-Clause-NetBSD 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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usr.bin/stat: Fix error message formatting.

PR: bin/261657
MFC after: 3 days

stat(1): Do not pass S_IFBLK to devname unconditionally

PR: 269190
Reviewed by: kib
MFC after: 1 week

usr.bin/stat: honour locale for "-t %+"

The man page states that "-t %+" prints time information in the same
format as date with no format specifier.

This was not the case, the format used was alwa

usr.bin/stat: honour locale for "-t %+"

The man page states that "-t %+" prints time information in the same
format as date with no format specifier.

This was not the case, the format used was always that of date for the
POSIX locale.

The fix suggested by the reporter leads to output that matches the
documentation.

Reported by: Jamie Landeg-Jones <jamie@catflap.org>
MFC after: 3 days

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MFHead @347527

Sponsored by: The FreeBSD Foundation

Add 'Birth' to 'stat -x' output. Current Linux stat(1)
also includes that.

Reviewed by: cem
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org

Add 'Birth' to 'stat -x' output. Current Linux stat(1)
also includes that.

Reviewed by: cem
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D20130

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Merge ^/head r336870 through r337615.

MFH @ r337607, in preparation for boarding

stat(1): cache id->name resolution

When invoked on a large list of files, it is most common for a small number of
uids/gids to own most of the results.

Like ls(1), use pwcache(3) to avoid repeatedl

stat(1): cache id->name resolution

When invoked on a large list of files, it is most common for a small number of
uids/gids to own most of the results.

Like ls(1), use pwcache(3) to avoid repeatedly looking up the same IDs.

Example microbenchmark and non-scientific results:

$ time (find /usr/src -type f -print0 | xargs -0 stat >/dev/null)

BEFORE:
3.62s user 5.23s system 102% cpu 8.655 total
3.47s user 5.38s system 102% cpu 8.647 total

AFTER:
1.23s user 1.81s system 108% cpu 2.810 total
1.43s user 1.54s system 107% cpu 2.754 total

Does this microbenchmark have any real-world significance? Until a use case
is demonstrated otherwise, I doubt it. Ordinarily I would be resistant to
optimizing pointless microbenchmarks in base utilities (e.g., recent totally
gratuitous changes to yes(1)). However, the pwcache(3) APIs actually
simplify stat(1) logic ever so slightly compared to the raw APIs they wrap,
so I think this is at worst harmless.

PR: 230491
Reported by: Thomas Hurst <tom AT hur.st>
Discussed with: gad@

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various: general 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

various: general 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.

No functional change intended.

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Use MIN() instead of MAX() as the previous syntax was wrote in a weird and
confused way: "prec > 9 ? 9 : prec".

Submitted by: pfg, ngie and luke <luke.tw@gmail.com>
MFC after: 2 weeks.

Use macro MAX() from sys/param.h.

MFC after: 2 weeks.

Merge head from 7/28

MFC @ r266724

An SVM update will follow this.

IFC @266473

Minor fixes to previous change introducing switch -H, as per comments
on -arch.

Reviewed by: gleb

Merge from head

Introduce a new command line switch '-H' for stat(1)
causing arguments to be interpreted as NFS file handles.

Reviewed by: -arch (jhb, eadler)
MFC after: 1 month

Merge fresh head.

MFC

IFC @ r242684

Sync from head

More -Wmissing-variable-declarations fixes.

In addition to adding `static' where possible:

- bin/date: Move `retval' into extern.h to make it visible to date.c.
- bin/ed: Move globally used variabl

More -Wmissing-variable-declarations fixes.

In addition to adding `static' where possible:

- bin/date: Move `retval' into extern.h to make it visible to date.c.
- bin/ed: Move globally used variables into ed.h.
- sbin/camcontrol: Move `verbose' into camcontrol.h and fix shadow warnings.
- usr.bin/calendar: Remove unneeded variables.
- usr.bin/chat: Make `line' local instead of global.
- usr.bin/elfdump: Comment out unneeded function.
- usr.bin/rlogin: Use _Noreturn instead of __dead2.
- usr.bin/tset: Pull `Ospeed' into extern.h.
- usr.sbin/mfiutil: Put global variables in mfiutil.h.
- usr.sbin/pkg: Remove unused `os_corres'.
- usr.sbin/quotaon, usr.sbin/repquota: Remove unused `qfname'.

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