A NOTE has been added to this issue. ====================================================================== https://austingroupbugs.net/view.php?id=1797 ====================================================================== Reported By: eggert Assigned To: ====================================================================== Project: Issue 8 drafts Issue ID: 1797 Category: System Interfaces Type: Error Severity: Objection Priority: normal Status: New Name: Paul Eggert Organization: UCLA Computer Science Dept. User Reference: strftime-%s Section: strftime Page Number: 2136 Line Number: 69836-69837 Final Accepted Text: ====================================================================== Date Submitted: 2024-01-15 23:56 UTC Last Modified: 2024-03-11 09:55 UTC ====================================================================== Summary: strftime "%s" should be able to examine tm_gmtoff ====================================================================== Relationships ID Summary ---------------------------------------------------------------------- related to 0001533 struct tm: add tm_gmtoff (and tm_zone) ... related to 0001816 daylight, timezone, tzname do not work ... child of 0001612 XSH strftime() new (I8) %s conversion r... child of 0000169 date utility needs ``%s'' ======================================================================
---------------------------------------------------------------------- (0006718) geoffclare (manager) - 2024-03-11 09:55 https://austingroupbugs.net/view.php?id=1797#c6718 ---------------------------------------------------------------------- > I suppose we could say that GNU/Linux, FreeBSD, and pretty much everyone else is broken. But it’s better to be realistic and tell users that when using strftime’s %z, %Z and %s formats, tm_zone and tm_gmtoff must be set to in-range values. For %z and %Z, requiring applications to set tm_zone and tm_gmtoff would create a conflict with the C standard. C17 says that the only member used by %z and %Z is tm_isdst. Of course, if an application explicitly sets tm_zone or tm_gmtoff then it is using an extension to C17 and this could alter the behaviour, and if the structure was populated by localtime() et al then use of tm_zone or tm_gmtoff can be an internal implementation detail, as per my previous note. However, the crucial case is when the application populates the structure in a way that does not set tm_zone or tm_gmtoff; for this case C17 requires that the conversion is done based on tm_isdst. Issue History Date Modified Username Field Change ====================================================================== 2024-01-15 23:56 eggert New Issue 2024-01-15 23:56 eggert Name => Paul Eggert 2024-01-15 23:56 eggert Organization => UCLA Computer Science Dept. 2024-01-15 23:56 eggert User Reference => strftime-%s 2024-01-15 23:56 eggert Section => strftime 2024-01-15 23:56 eggert Page Number => 2136 2024-01-15 23:56 eggert Line Number => 69836-69837 2024-01-16 01:29 steffen Note Added: 0006623 2024-01-16 01:42 steffen Note Added: 0006624 2024-01-16 01:42 steffen Note Deleted: 0006623 2024-02-01 16:42 nick Relationship added related to 0001533 2024-02-12 16:11 eblake Note Added: 0006651 2024-02-25 06:50 kre Note Added: 0006677 2024-02-25 06:54 kre Note Edited: 0006677 2024-02-26 18:28 eggert Note Added: 0006688 2024-02-26 19:23 eblake Relationship added related to 0001816 2024-02-26 19:32 eblake Note Added: 0006689 2024-02-26 19:52 eblake Relationship added child of 0001612 2024-02-26 19:55 eblake Relationship added child of 0000169 2024-02-26 20:02 eblake Note Added: 0006690 2024-02-29 12:10 geoffclare Note Added: 0006691 2024-02-29 12:15 geoffclare Note Added: 0006692 2024-02-29 16:19 shware_systems Note Added: 0006693 2024-03-01 10:09 geoffclare Note Added: 0006698 2024-03-02 09:02 eggert Note Added: 0006700 2024-03-03 01:20 kre Note Added: 0006701 2024-03-07 10:44 geoffclare Note Added: 0006706 2024-03-07 11:04 geoffclare Note Added: 0006707 2024-03-11 09:55 geoffclare Note Added: 0006718 ======================================================================
