Re: Environment variables set by /env/bin/init disappear when script exits

From: Sascha Hauer <s.hauer@pengutronix.de>
To: Ian Abbott <abbotti@mev.co.uk>
Cc: barebox@lists.infradead.org
Subject: Re: Environment variables set by /env/bin/init disappear when script exits
Date: Wed, 12 Jun 2019 08:32:42 +0200	[thread overview]
Message-ID: <20190612063242.5lqb6nfattoghtdc@pengutronix.de> (raw)
In-Reply-To: <2ed1eda2-04b8-0ddc-0be0-793aae74f57d@mev.co.uk>

Hi Ian,

On Tue, Jun 11, 2019 at 04:21:06PM +0100, Ian Abbott wrote:
> On 11/06/2019 15:52, Ian Abbott wrote:
> > Since commit 90df2a955e3c ("defaultenv: Convert init script to C"), if
> > the legacy /env/bin/init script is still being used, any environment
> > variables that were set in the script (such as the PS1 prompt) disappear
> > when the script exits.  I guess it is because the script is now run
> > directly by run_command(initfile) (initfile is "/env/bin/init") rather
> > than by run_command("source /env/bin/init").
> 
> This seems easy to fix in "common/startup.c", assuming it is indeed a bug.
> Which of the following fixes would be preferable?

Indeed this behaviour was not intended and should be fixed.

> 
> 1. Call run_command with a string literal:
> 
>     run_command("source /env/bin/init");

I'd probably do something like this:

#define INITFILE "/env/bin/init"

	run_command("source " INITFILE);

But I might decide differently if you ask me tomorrow, so do whatever
looks best to you ;)

Sascha

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