Expose POSIX functions incorporated into C23

C23 has incoporated a small number of POSIX functions, so these
should be exposed for C23, regardless of POSIX.

Reviewed by: imp, emaste
Differential Re

Expose POSIX functions incorporated into C23

C23 has incoporated a small number of POSIX functions, so these
should be exposed for C23, regardless of POSIX.

Reviewed by: imp, emaste
Differential Revision: https://reviews.freebsd.org/D47856

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timezone: Move to the XSI/POSIX definition for timezone.

The old timezone(3) function has long since been obsolete and has a
fatally flawed interface. Retain this function for compatibility
purposes

timezone: Move to the XSI/POSIX definition for timezone.

The old timezone(3) function has long since been obsolete and has a
fatally flawed interface. Retain this function for compatibility
purposes, but shift to providing the offset from UTC in the timezone
variable, whether or not the timezone observes summer time in the
'daylight' variable. Document the tzname variable that's already been
set. Also make _tztab() static. It's not used in libc (or anywhere in
the tree) and it's not exported as a public dynamic symbol.

Sponsored by: Netflix
Reviewed by: brooks, kib
Differential Revision: https://reviews.freebsd.org/D44281

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include: 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 pe

include: 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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time.h: Fix visibility check for C11 and C23 features.

__BSD_VISIBLE is always defined; we need to check if it's true.

Fixes: d02489d11aed 9b5d724cad10
MFC after: 3 days
Reviewed by: brooks, imp
D

time.h: Fix visibility check for C11 and C23 features.

__BSD_VISIBLE is always defined; we need to check if it's true.

Fixes: d02489d11aed 9b5d724cad10
MFC after: 3 days
Reviewed by: brooks, imp
Differential Revision: https://reviews.freebsd.org/D41733

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libc: Add timespec_getres(3) as per C23.

This also adds support for TIME_MONOTONIC to timespec_get(3).

Reviewed by: allanjude
Differential Revision: https://reviews.freebsd.org/D41524

Remove $FreeBSD$: one-line .h pattern

Remove /^\s*\*+\s*\$FreeBSD\$.*$\n/

libc: Remove prototype and documentation for tzsetwall().

PR: 269445
Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D38481

time.h: reduce CLOCK_ namespace pollution, move to _clock_id.h

Attempt to comply with the strict namespace pollution requirements of
_POSIX_C_SOURCE. Add guards to limit visitbility of CLOCK_ and TI

time.h: reduce CLOCK_ namespace pollution, move to _clock_id.h

Attempt to comply with the strict namespace pollution requirements of
_POSIX_C_SOURCE. Add guards to limit visitbility of CLOCK_ and TIMER_
defines as appropriate. Only define the CLOCK_ variables relevant to the
specific standards. Move all the sharing to sys/_clock_id.h and make
time.h and sys/time.h both include that rather than copy due to the
now large number of clocks and compat defines.

Please note: The old time.h previously used these newer dates:
CLOCK_REALTIME 199506
CLOCK_MONOTONIC 200112
CLOCK_THREAD_CPUTIME_ID 200112
CLOCK_PROCESS_CPUTIME_ID 200112

but glibc defines all of these for 199309. glibc uses this date for all
these values, however, only CLOCK_REALTIME was in IEEE 1003.1b. Add a
comment about this to document it. A large number of programs and
libraries assume that these will be defined for _POSIX_C_SOURCE =
199309.

In addition, leak CLOCK_UPTIME_FAST for the pocl package until it can be
updated to use a simple CLOCK_MONOTONIC.

Reviewed by: kib
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D31056

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MFH

Sponsored by: Rubicon Communications, LLC (netgate.com)

Make CLOCK_REALTIME and TIMER_ABSTIME available for XOPEN_SOURCE >= 500.

Reported by: jbeich
PR: 247701
Reviewed by: jilles
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revisi

Make CLOCK_REALTIME and TIMER_ABSTIME available for XOPEN_SOURCE >= 500.

Reported by: jbeich
PR: 247701
Reviewed by: jilles
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D25554

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Correctly check for C++17 and higher when declaring timespec_get()

Summary:
In rS338751, the check to declare `timespec_get()` for C++17 and higher
was incorrectly done against a `cplusplus` define,

Correctly check for C++17 and higher when declaring timespec_get()

Summary:
In rS338751, the check to declare `timespec_get()` for C++17 and higher
was incorrectly done against a `cplusplus` define, while it should have
been `__cplusplus`.

Fix this by using `__cplusplus`, and also bump `__FreeBSD_version` so it
becomes possible to correctly check for `timespec_get()` in upstream
libc++ headers.

Reviewed by: brooks, emaste
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D22735

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MFH r338661 through r339200.

Sponsored by: The FreeBSD Foundation

Merge ^/head r338731 through r338987.

Fix C11 and POSIX 1003.1b-1993 compliance in time.h

Only expose timespec_get in C11, C++17, or BSD code. Always define
struct timespect if defining timespec_get.

PR: 231425
Reviewed by: kib
Appro

Fix C11 and POSIX 1003.1b-1993 compliance in time.h

Only expose timespec_get in C11, C++17, or BSD code. Always define
struct timespect if defining timespec_get.

PR: 231425
Reviewed by: kib
Approved by: re (gjb)
Differential Revision: https://reviews.freebsd.org/D17174

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MFH @ r337607, in preparation for boarding

Merge ^/head r337286 through r337585.

Bring in timespce_get form NetBSD.

Bring in the functionality for timespec_get from NetBSD. I've lightly
edited the .c file to remove _DIAGASSERT because FreeBSD doesn't have
that functionality and

Bring in timespce_get form NetBSD.

Bring in the functionality for timespec_get from NetBSD. I've lightly
edited the .c file to remove _DIAGASSERT because FreeBSD doesn't have
that functionality and the typical #define'ing it to assert isn't
right here. The man page is verbatim from NetBSD, but will be revised
as part of a larger cleanup of the time man pages (they are
inconsistent and vague in all the wrong places).

Differential Review: https://reviews.freebsd.org/D16649

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Add time2posix and posix2time to time.h

These are documented in `time2posix.3` but the symbols are not actually
visible. Since these are not POSIX hide them behind _BSD_VISIBLE.

Reviewed by: wollm

Add time2posix and posix2time to time.h

These are documented in `time2posix.3` but the symbols are not actually
visible. Since these are not POSIX hide them behind _BSD_VISIBLE.

Reviewed by: wollman
Differential Revision: https://reviews.freebsd.org/D15530

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Do not include float interfaces when using libsa.

We don't support float in the boot loaders, so don't include
interfaces for float or double in systems headers. In addition, take
the unusual step o

Do not include float interfaces when using libsa.

We don't support float in the boot loaders, so don't include
interfaces for float or double in systems headers. In addition, take
the unusual step of spiking double and float to prevent any more
accidental seepage.

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Merge ^/head r325999 through r326131.

include: 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

include: 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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Add clock_nanosleep()

Add a clock_nanosleep() syscall, as specified by POSIX.
Make nanosleep() a wrapper around it.

Attach the clock_nanosleep test from NetBSD. Adjust it for the
FreeBSD behavior o

Add clock_nanosleep()

Add a clock_nanosleep() syscall, as specified by POSIX.
Make nanosleep() a wrapper around it.

Attach the clock_nanosleep test from NetBSD. Adjust it for the
FreeBSD behavior of updating rmtp only when interrupted by a signal.
I believe this to be POSIX-compliant, since POSIX mentions the rmtp
parameter only in the paragraph about EINTR. This is also what
Linux does. (NetBSD updates rmtp unconditionally.)

Copy the whole nanosleep.2 man page from NetBSD because it is complete
and closely resembles the POSIX description. Edit, polish, and reword it
a bit, being sure to keep any relevant text from the FreeBSD page.

Reviewed by: kib, ngie, jilles
MFC after: 3 weeks
Relnotes: yes
Sponsored by: Dell EMC
Differential Revision: https://reviews.freebsd.org/D10020

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Merge ^/head r306412 through r306905.

Export the mq_getfd_np() symbol from librt.so, which allows to get
file descriptor for the given posix mqueue. Export the
timer_oshandle_np() symbol to get ktimer id for the given posix timer.

Requ

Export the mq_getfd_np() symbol from librt.so, which allows to get
file descriptor for the given posix mqueue. Export the
timer_oshandle_np() symbol to get ktimer id for the given posix timer.

Requested by: Lewis Donzis <lew@perftech.com>
Reviewed by: jilles
Discussed with: kan
Sponsored by: The FreeBSD Foundation
MFC after: 1 week

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Merge fresh head.