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From: Vincent Lefevre <vincent@vinc17.net>
To: zsh-users@zsh.org
Subject: Re: print builtin preceded by parameter assignment
Date: Thu, 11 Apr 2019 12:40:40 +0200	[thread overview]
Message-ID: <20190411104040.GA29775@cventin.lip.ens-lyon.fr> (raw)
In-Reply-To: <CAH+w=7bc6oTLWfa5RiNtwdX5ZjT+wi6A3Vb3mxmRc9b8fQH-1A@mail.gmail.com>

On 2019-04-10 10:25:18 -0700, Bart Schaefer wrote:
> For what it's worth, Bash seems to (mostly) agree with the zsh
> interpretation.  If I set HISTTIMEFORMAT to something containing %Z
> and then run "TZ=UTC history" I get timestamps in the local timezone,
> not in UTC.  If I first export TZ=UTC and then run history, I get
> timestamps in UTC.

Your test seems incorrect.

$ HISTTIMEFORMAT=%Z
$ history
    1  CESTps
[...]
$ TZ=UTC history
    1  UTCps
[...]

This is with:

GNU bash, version 5.0.3(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2019 Free Software Foundation, Inc.

Ditto with:

GNU bash, version 4.4.12(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2016 Free Software Foundation, Inc.

Adding the --posix option doesn't change the behavior related to
the output timezone.

> *However*, if I run "HISTTIMEFORMAT='%r ' history" the change takes
> place for the builtin and I get the different format.

Ditto here.

> So it seems to matter whether the variable itself is "known" to
> Bash, or something.

At least I get a consistent behavior. This suggests something
wrong with your test of TZ.

-- 
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)

  reply	other threads:[~2019-04-11 10:41 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20190410125753epcas1p4052249a86c562165e1fe2a485d70e70b@epcas1p4.samsung.com>
2019-04-10 12:55 ` Vincent Lefevre
2019-04-10 13:14   ` Peter Stephenson
2019-04-10 14:11     ` Vincent Lefevre
2019-04-10 14:39       ` Peter Stephenson
2019-04-10 17:25         ` Bart Schaefer
2019-04-11 10:40           ` Vincent Lefevre [this message]
2019-04-11 20:58             ` Bart Schaefer
2019-04-11 21:42               ` Bart Schaefer
2019-04-24 12:31                 ` Vincent Lefevre
2019-04-24 16:00                   ` Bart Schaefer
2019-04-25 19:47                     ` Bart Schaefer
2019-04-11 10:45         ` Vincent Lefevre

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