how does barebox deal with more than one environment?
Robert P. J. Day
rpjday at crashcourse.ca
Mon Dec 3 07:48:43 EST 2012
On Mon, 3 Dec 2012, Sascha Hauer wrote:
> On Sat, Dec 01, 2012 at 08:19:26AM -0500, Robert P. J. Day wrote:
> > On Sat, 1 Dec 2012, Robert P. J. Day wrote:
> > >
> > > writing up a simple barebox exercise for students and on this page:
> > >
> > > http://wiki.barebox.org/doku.php?id=user:first_steps
> > >
> > > it seems clear(?) that you can define multiple environments that will
> > > appear at /dev/env0, /dev/env1, etc, but that page also claims that
> > > *only* the configuration on /dev/env0 will be executed automatically
> > > if barebox finds that it's a valid configuration sector.
> > >
> > > so what happens with the additional environments? that page doesn't
> > > make it clear. i'm just about to read the source to see if i can
> > > figure this out.
> > oh, wait, i think i see ... the "loadenv" command will load a
> > given environment into a directory so i'm *assuming* that
> > additional environments are simply available to be loaded, but
> > /dev/env0 is the only one treated special. or feel free to
> > correct me if i'm hopelessly wrong.
> /dev/env0 is the only environment used by barebox by default. As you
> correctly found out loadenv/saveenv could be used to load arbitrary
> envfs images to arbitrary directories. We could also think about
> adding some kind of redundancy, but currently this would be board
> specific, there is no generic heuristic to fall back to a second env
> if the first one is corrupted.
oh, i wasn't suggesting getting that carried away, just wanted to
clarify that only the first environment is automatically consulted,
while additional environments are available only *manually* to the
developer. that's fine, i just wanted to make sure i understood that.
Robert P. J. Day Ottawa, Ontario, CANADA
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