public inbox for dash@vger.kernel.org
 help / color / mirror / Atom feed
From: "Lawrence Velázquez" <vq@larryv.me>
To: "Christoph Anton Mitterer" <calestyo@scientia.org>
Cc: dash@vger.kernel.org
Subject: Re: wrong behaviour when unsetting/setting some variables
Date: Mon, 26 Feb 2024 23:23:16 -0500	[thread overview]
Message-ID: <e1f38631-18fa-4962-89ee-d9bddd83eb58@app.fastmail.com> (raw)
In-Reply-To: <43f0631aea36f6b49e5c3dfdfe481a5a2b1fec6c.camel@scientia.org>

On Mon, Feb 26, 2024, at 9:07 PM, Christoph Anton Mitterer wrote:
> The consequence of that is at least, that one has no chance to fully
> unset these variables and even if they loose their value, they’ll be
> exported to executed commands, possibly altering their behaviour.

They are not exported.

	% env -i /opt/local/bin/dash
	$ export MAIL=v
	$ unset -v MAIL
	$ export
	export MAIL
	export PWD='/private/tmp'
	$ env
	PWD=/private/tmp

Their local counterparts are not exported, either.

	% env -i /opt/local/bin/dash
	$ f() { local FOO=v; export FOO; unset -v FOO; export; env; }
	$ f
	export FOO
	export PWD='/private/tmp'
	PWD=/private/tmp

-- 
vq

  parent reply	other threads:[~2024-02-27  4:23 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-27  2:07 wrong behaviour when unsetting/setting some variables Christoph Anton Mitterer
2024-02-27  3:07 ` Harald van Dijk
2024-02-27  3:28   ` Christoph Anton Mitterer
2024-02-27 10:24     ` Harald van Dijk
2024-02-27  4:23 ` Lawrence Velázquez [this message]
2024-02-27  5:11   ` Christoph Anton Mitterer
2024-02-27  7:53     ` Lawrence Velázquez
2024-02-29 12:29       ` Christoph Anton Mitterer
2024-02-29 17:58         ` Martijn Dekker
2024-02-29 19:03           ` Christoph Anton Mitterer
2024-02-28  0:56 ` Harald van Dijk
2024-02-29 12:24   ` Christoph Anton Mitterer
2024-02-29 18:03     ` Martijn Dekker
2024-02-29 17:41   ` Martijn Dekker
2024-02-29 18:07     ` Harald van Dijk
2024-02-29 18:45       ` Martijn Dekker
2024-02-29 18:56         ` Harald van Dijk
2024-03-10 21:33           ` Martijn Dekker
2024-04-11  1:26             ` Christoph Anton Mitterer
2024-04-11  7:43               ` [PATCH] var: Fix unexporting of local variables using unset Herbert Xu
2024-04-11 13:27                 ` Christoph Anton Mitterer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=e1f38631-18fa-4962-89ee-d9bddd83eb58@app.fastmail.com \
    --to=vq@larryv.me \
    --cc=calestyo@scientia.org \
    --cc=dash@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox