Thanks for reporting that we should be linking to POSIX.1-2024. I
installed the attached proposed patches into the development repository.From 656715da3458fbff7e261fe74c46a4ae61a8ca9e Mon Sep 17 00:00:00 2001
From: Paul Eggert <egg...@cs.ucla.edu>
Date: Fri, 28 Mar 2025 15:15:45 -0700
Subject: [PROPOSED 1/2] Give URLs for POSIX.1-2024
* theory.html: Add URL for POSIX.1-2024
(problem reported by Max Nikulin).
Also add a URL for POSIX.1-1988 and make POSIX versions clearer.
---
theory.html | 18 ++++++++++--------
1 file changed, 10 insertions(+), 8 deletions(-)
diff --git a/theory.html b/theory.html
index 352a3d87..96d1244a 100644
--- a/theory.html
+++ b/theory.html
@@ -89,15 +89,16 @@ The <code><abbr>tz</abbr></code> code is upwards compatible with <a
href="https://en.wikipedia.org/wiki/POSIX";>POSIX</a>, an international
standard for <a
href="https://en.wikipedia.org/wiki/Unix";>UNIX</a>-like systems.
-As of this writing, the current edition of POSIX is POSIX.1-2024,
-which has been published but not yet in HTML form.
-Unlike its predecessor POSIX.1-2017 (<a
-href="https://pubs.opengroup.org/onlinepubs/9699919799/";> The Open
-Group Base Specifications Issue 7</a>, IEEE Std 1003.1-2017, 2018
-Edition), POSIX.1-2024 requires support for the
+As of this writing, the current edition of POSIX is
+<a href="https://pubs.opengroup.org/onlinepubs/9799919799/";>POSIX.1-2024</a>
+(The Open Group Base Specifications Issue 8, IEEE Std 1003.1-2024).
+Unlike its predecessors
+<a href="https://archive.org/details/POSIX.1-1988";>POSIX.1-1988</a> through
+<a href="https://pubs.opengroup.org/onlinepubs/9699919799/";>POSIX.1-2017</a>,
+POSIX.1-2024 requires support for the
<code><abbr>tz</abbr></code> database, which has a
model for describing civil time that is more complex than the
-standard and daylight saving times required by POSIX.1-2017.
+standard and daylight saving times required by earlier POSIX editions.
A <code><abbr>tz</abbr></code> timezone corresponds to a ruleset that can
have more than two changes per year, these changes need not merely
flip back and forth between two alternatives, and the rules themselves
@@ -914,7 +915,8 @@ environment variable <code>TZ</code>, which can have two forms:
<h3 id="POSIX.1-2017">POSIX.1-2017 properties and limitations</h3>
<p>
-Some platforms support only the features required by POSIX.1-2017,
+Some platforms support only the features required by POSIX.1-2017
+and earlier editions,
and have not yet upgraded to POSIX.1-2024.
Code intended to be portable to these platforms must deal
with problems that were fixed in later POSIX editions.
--
2.45.2
From eb0ab113af092a59c55c46854613e0e57f7f01ef Mon Sep 17 00:00:00 2001
From: Paul Eggert <egg...@cs.ucla.edu>
Date: Sat, 29 Mar 2025 00:11:43 -0600
Subject: [PROPOSED 2/2] Update POSIX URLs
* tz-link.html: Update POSIX URLs to POSIX.1-2024.
---
theory.html | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/theory.html b/theory.html
index 96d1244a..458d64ac 100644
--- a/theory.html
+++ b/theory.html
@@ -191,7 +191,7 @@ in decreasing order of importance:
href="https://en.wikipedia.org/wiki/ASCII";>ASCII</a> letters,
'<code>.</code>', '<code>-</code>' and '<code>_</code>'.
Do not use digits, as that might create an ambiguity with <a
- href="https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03";>POSIX's proleptic
+ href="https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/V1_chap08.html#tag_08_03";>POSIX's proleptic
<code>TZ</code> strings</a>.
A file name component must not exceed 14 characters or start with
'<code>-</code>'.
@@ -422,8 +422,8 @@ in decreasing order of importance:
special meaning to the
<a href="https://en.wikipedia.org/wiki/Unix_shell";>UNIX shell</a>
and cause commands like
- '<code><a href="https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#set";>set</a>
- `<a href="https://pubs.opengroup.org/onlinepubs/9699919799/utilities/date.html";>date</a>`</code>'
+ '<code><a href="https://pubs.opengroup.org/onlinepubs/9799919799/utilities/V3_chap02.html#set";>set</a>
+ `<a href="https://pubs.opengroup.org/onlinepubs/9799919799/utilities/date.html";>date</a>`</code>'
to have unexpected effects.
Previous editions of this guideline required upper-case letters, but the
Congressman who introduced
--
2.45.2
