A NOTE has been added to this issue. ====================================================================== https://austingroupbugs.net/view.php?id=1816 ====================================================================== Reported By: eggert Assigned To: ====================================================================== Project: Issue 8 drafts Issue ID: 1816 Category: System Interfaces Type: Error Severity: Objection Priority: normal Status: New Name: Paul Eggert Organization: UCLA Computer Science User Reference: Section: daylight, timezone, tzname Page Number: 2310-2311 Line Number: 75175-75207 Final Accepted Text: ====================================================================== Date Submitted: 2024-02-23 08:54 UTC Last Modified: 2024-02-26 18:06 UTC ====================================================================== Summary: daylight, timezone, tzname do not work with location-based TZ ======================================================================
---------------------------------------------------------------------- (0006687) eggert (reporter) - 2024-02-26 18:06 https://austingroupbugs.net/view.php?id=1816#c6687 ---------------------------------------------------------------------- Here is a revised desired action that reflects kre's comments. It separates the FUTURE DIRECTIONS changes into a later part marked "Changes for Issue 8 TC1", and it replaces "stdoffsettish timezone" with "timezone that corresponds to a TZ of the second format" since nobody thought of better names. I didn't know that a future version of POSIX could simply remove the affected variables, without marking them as obsolescent in an intervening version. ---- Changes that can be done as an interpretation now ---- daylight page 801 lines 27442-27448 (the entire page) (This part of the change is editorial, to make the other changes simpler.) Remove this page, since 'daylight' is already documented under tzset(), and there's no reason to give it a separate page (there is no page for the related variable tzname). Similarly for timezone, page 2279 lines 74379-74385 (the entire page, which oddly is labeled "timezone()" at top right). strptime APPLICATION USAGE page 2160 line 70602: Change "If this name matches" to "If the local timezone corresponds to a TZ of the second format and this name matches". line 70604: Likewise. tzset DESCRIPTION page 2310 line 75175: Prepend "If the local timezone corresponds to a TZ of the second format," line 75179: Also prepend "If the local timezone corresponds to a TZ of the second format," Line 75182: Append the following paragraph: If the local timezone does not correspond to a TZ of the second format, the tzset() function may set the external variables tzname, daylight and timezone to unspecified values. line 75199 (APPLICATION USAGE) Append the following paragraph: The values of the variables daylight, timezone, and tzname should be used only if the local timezone is known to correspond to a TZ of the second format. The abovementioned newly-added instances of the phrase "TZ of the second format" may need a cross-reference to section 8.3, Other Environment Variables, TZ, page 176 line 6219, to help the reader understand what "TZ of the second format" means. ---- Changes for Issue 8 TC1 ---- <time.h> FUTURE DIRECTIONS page 454 line 15856 Change "None" to "The variables daylight, timezone, and tzname are planned to be removed, as they have unspecified values unless the timezone corresponds to a TZ of the second format." page 2311 line 75207 (FUTURE DIRECTIONS): Change "None" to "The variables daylight, timezone, and tzname are planned to be removed, as they have unspecified values unless the local timezone corresponds to a TZ of the second format." Issue History Date Modified Username Field Change ====================================================================== 2024-02-23 08:54 eggert New Issue 2024-02-23 08:54 eggert Name => Paul Eggert 2024-02-23 08:54 eggert Organization => UCLA Computer Science 2024-02-23 08:54 eggert Section => daylight, timezone, tzname 2024-02-23 08:54 eggert Page Number => 2310-2311 2024-02-23 08:54 eggert Line Number => 75175-75207 2024-02-25 07:07 kre Note Added: 0006678 2024-02-26 18:06 eggert Note Added: 0006687 ======================================================================
