Re: [PATCH v1 01/23] man/man2/clock_getres.2: HISTORY: Update first POSIX appearance of clock_* syscalls

[Seth McDonald <sethmcmail@pm.me>]

[-- Attachment #1: Type: text/plain, Size: 1693 bytes --]

Hi Alex,

On Wed, Jan 21, 2026 at 04:49:25PM +0100, Alejandro Colomar wrote:
> Hi Seth,
> 
> On Wed, Jan 21, 2026 at 12:06:57PM +0000, Seth McDonald wrote:
> > clock_getres(2), clock_gettime(2), and clock_settime(2) first appeared
> > in POSIX.1-1996.[1]  SUSv2 incorporates POSIX.1-1996, so listing both is
> > redundant.
> 
> Are you sure SUSv2 incorporates POSIX.1-1996?  Could you please show
> sources for that?

We can reference the following SUSv2 PDF:
CAE Specification, System Interfaces and Headers, Issue 5.
<https://pubs.opengroup.org/onlinepubs/009639399/toc.pdf>

Section 1.6 "Relationship to Formal Standards", page 11 states:

	Great care has been taken to ensure that this specification is
	fully aligned with the following formal standards:
	- ISO/IEC 9945-1:1996
	- ISO/IEC 9945-2:1993
	- ISO/IEC 9899:1990
	- ISO/IEC 9899:1990/Amendment 1:1994 (E) (MSE)
	- Federal Information Procurement Standards (FIPS) 151-2.

	Any conflict between this specification and any of these
	standards is unintentional.

Additionally, section 1.7 "Portability", page 12 states:

	This document describes a superset of the requirements of the
	ISO POSIX-1 standard and the ISO C standard. [...] (The ISO
	POSIX-1 standard is identical to IEEE Std 1003.1-1996, which is
	often referred to as the POSIX.1 standard. [...])

For context, page xiii defines "ISO C" as ISO/IEC 9899:1990 including
Technical Corrigendum 1:1994 and Amendment 1:1994.  And "ISO POSIX-1" as
ISO/IEC 9945-1:1996.

So SUSv2 XSH is a superset of POSIX.1-1996 and C95.

-- 
Take care,
	Seth McDonald.

On-list:  2336 E8D2 FEB1 5300 692C  62A9 5839 6AD8 9243 D369
Off-list: 82B9 620E 53D0 A1AE 2D69  6111 C267 B002 0A90 0289

[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 322 bytes --]