blspec - autoboot + timeout/default

Sascha Hauer sha at
Mon Feb 7 00:59:30 PST 2022

On Sat, Feb 05, 2022 at 03:58:54PM +0100, Frank Wunderlich wrote:
> Hi,
> can i boot directly to blspec-menu (boot -m sd.1) with setting in
> default env and boot a specific entry (by title/filename) after some
> time (e.g.3-5 sec)?

There is a -t <secs> option to the boot command. It seems however that
there is no possibility to select a specfic entry beforehand. The first
one would be booted.

> i have defined some blspec files in /mnt/sd.1/loader/entries/ and i
> want to show the menu by default and after some time the entry from
> specific file should be booted. this gives user the possibility to
> modify this conf to define his kernel for autoboot in headless mode.
> i tried to modify defaultenv/nv/boot.default, but this needs filenames
> in /env/boot, no commands and if i use a script, it cannot start the
> "boot -m sd.1" because the /env/boot scripts run bootm (tried loading
> barebox with such script - ended with putting a separate script in
> /env/bin/)

It should work by setting:

nv boot.default=myboot

With /env/boot/myboot:


boot -m sd.1 -t 3

> btw. is there a way to load environment from a txt file from a
> specific partition (similar to uboots uEnv.txt)?

The barebox environment is a directory tree rather than a list of
variables, so there is no way to load a text file as environment.
There is the loadenv command which takes the path to an environment
image as argument. You can generate such an image on the host
with the bareboxenv tool and then load it under barebox with loadenv.


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