From: Pavel Machek <pavel@ucw.cz>
To: Stefan Seyfried <stefan.seyfried@googlemail.com>
Cc: pm list <linux-pm@lists.linux-foundation.org>
Subject: Re: [PATCH 1/1] Add /sys/power/last_state support
Date: Wed, 6 Jan 2010 08:01:07 +0100 [thread overview]
Message-ID: <20100106070107.GB1382@ucw.cz> (raw)
In-Reply-To: <20091215091945.66b245ed@strolchi.home.s3e.de>
On Tue 2009-12-15 09:19:45, Stefan Seyfried wrote:
> On Mon, 7 Dec 2009 18:17:36 -0600
> Victor Lowther <victor.lowther@gmail.com> wrote:
> > On Dec 7, 2009, at 3:41 PM, "Rafael J. Wysocki" <rjw@sisk.pl> wrote:
> > > Can't you just use the error code returned by "echo mem > /sys/power/
> > > state"?
> >
> > I can, now that I know about it - I did not see anything about error
> > codes when scanning the documentation.
>
> Note that "echo" only will return 0 or 1, not a real error code. You'll
> need a 5-line C program to get the errno that's returned from the
> kernel.
> It might be interesting to know *why* it failed (e.g. no swap
> partition or not enough space in there).
...and if the error codes are not unique enough, I guess we can just
improve them.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
prev parent reply other threads:[~2010-01-06 7:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3c192bd846cc4337d9999c6cd66b649232d9561c.1260074113.git.victor.lowther@gmail.com>
2009-12-07 21:41 ` [PATCH 1/1] Add /sys/power/last_state support Rafael J. Wysocki
2009-12-08 0:17 ` Victor Lowther
2009-12-15 8:19 ` Stefan Seyfried
2010-01-06 7:01 ` Pavel Machek [this message]
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