From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox <barebox@lists.infradead.org>
Subject: Re: what meaning of command function return val
Date: Tue, 4 Dec 2012 08:42:32 +0100 [thread overview]
Message-ID: <20121204074232.GU10369@pengutronix.de> (raw)
In-Reply-To: <20121204025454.GC20812@greatfirst.com>
On Tue, Dec 04, 2012 at 10:54:54AM +0800, 张忠山 wrote:
> When write a command function do_xxx.
>
> When all right it should return zero.
>
> But when error, It should return a negtive value or a positive value?
> And what difference between neg-val and pos-val?
Traditionally only positive error values were supported. This was
changed recently so you can return negative error codes now. The
difference is that with negative error values barebox will print
a string representation of the error code. If that's suitable for
your command I suggest to return negative codes.
Sascha
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prev parent reply other threads:[~2012-12-04 7:42 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-04 2:54 what meaning of command function return val 张忠山
2012-12-04 7:42 ` Sascha Hauer [this message]
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