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From: Guy Harris <gharris@sonic.net>
To: Russ Allbery <eagle@eyrie.org>
Cc: Rich Felker <dalias@libc.org>, Ian Abbott via tz <tz@iana.org>,
	musl@lists.openwall.com
Subject: [musl] Re: [tz] [musl] Re: Weird PST8PDT and EST5EDT behavior on Alpine Linux
Date: Tue, 5 Mar 2024 13:37:36 -0800	[thread overview]
Message-ID: <BB11A375-58EC-421B-AAEA-B35B034146D0@sonic.net> (raw)
In-Reply-To: <87wmqgpfcq.fsf@hope.eyrie.org>

On Mar 5, 2024, at 12:56 PM, Russ Allbery via tz <tz@iana.org> wrote:

> but for the record, PST8PDT was for support for very
> old commercial UNIXes where I believe that was the only recognized style
> of TZ setting, and I'm pretty dubious that the POSIX-introduced :PST8PDT
> syntax would work there.

That TZ syntax dates back at least to System III:

	http://www.bitsavers.org/pdf/att/unix/System_III/UNIX_Users_Manual_Release_3_Jun80.pdf

(see CTIME(3C)), which did not support anything tzdb-related, and didn't even support the more elaborate POSIX TZ syntax to include rules.  At least according to the CTIME(3C) page, System V Release 1 doesn't appear to support the POSIX syntax (or tzdb), and the same is true of SVR2 and SVR3.

Full POSIX support - but not tzdb support, may have shown up in SVR3.2; SVR4 had a tzcode-based implementation and shipped with the tzdb files.

  reply	other threads:[~2024-03-05 21:44 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <87edcqv69m.fsf@hope.eyrie.org>
2024-03-05  3:52 ` [musl] Re: [tz] " Đoàn Trần Công Danh
2024-03-05  4:31   ` Paul Eggert
2024-03-05 20:12   ` Rich Felker
2024-03-05 20:56     ` Russ Allbery
2024-03-05 21:37       ` Guy Harris [this message]
2024-03-05 22:03         ` [musl] Re: [tz] [musl] " Russ Allbery
2024-03-05 22:12           ` Guy Harris
2024-03-05 22:31             ` Russ Allbery
2024-03-06 15:39               ` James Cloos
2024-03-08 17:46                 ` [musl] Re: [tz] " Paul Eggert
2024-03-08 19:02                   ` Rich Felker
2024-03-09  0:09                     ` James Cloos
2024-03-09  1:57                     ` [musl] Re: [tz] [musl] " Guy Harris
2024-03-08 18:39                 ` Guy Harris
2024-03-08 19:05                   ` [musl] Re: [tz] " Paul Eggert
2024-03-09  0:03                   ` [musl] " James Cloos
2024-03-06  0:47     ` [musl] Re: [tz] " Paul Eggert
2024-03-06  1:54       ` Rich Felker

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