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From: Christian Eggers <ceggers@arri.de>
To: Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: barebox@lists.infradead.org, ceggers@gmx.de
Subject: Re: [PATCH] bootchooser: Change name of kernel parameter
Date: Mon, 27 Jan 2020 10:37:53 +0100	[thread overview]
Message-ID: <7624877.e5WoEmy3uL@n95hx1g2> (raw)
In-Reply-To: <153b40a5-3a31-da30-dfbb-9d2eeb82c426@pengutronix.de>

Hello Ahmad,

> Existing userspace like RAUC[1] rely on this naming, so the default may
> not be changed.
> 
> [1]: https://github.com/rauc/rauc/blob/f52978d9736f18794f7e277ca440e2e4e78c9703/src/context.c#L47
that is what I already suspected...

For my initramfs (klibc based), I need a very cheap solution for mounting the "right" root fs. Currently
I work only with standard utilities (sh, mount, cat, ...) and I avoid creating a own program for this.
I had just success with the following expression

read CMDLINE < /proc/cmdline
if [ "${CMDLINE#bootchooser.active=system1}" != "${CMDLINE}" ]; then
	root=ubi0:rootfs1
else
	root=ubi0:rootfs0
fi
mount -t ubifs $root /root

If the string "bootchooser.active=system1" appears on the command line, the expression will match.
This way I can distinguish between "system1" and "system0".

As the result, my previous patch should be dropped.

regards
Christian





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      reply	other threads:[~2020-01-27  9:38 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-27  7:46 Christian Eggers
2020-01-27  8:31 ` Ahmad Fatoum
2020-01-27  9:37   ` Christian Eggers [this message]

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