command documentation

[Jasper van Santen]

Hi Ralph,

Thanks a lot for the info.

I had already seen the movie, the book would have been better ;)

Unfortunately I don't have easy access to the prompt since it's embedded.
So i can't prompt for help.
Fortunately I build U-Boot with buildroot, so i have the source code.
It is a big meager, but I ended up grepping the man pages from source:

pcregrep -M -r --buffer-size 9000000 "U_BOOT_CMD\([^;]+.*" . >
U_BOOT_CMD_HELP.txt

Cheers,

Jasper

On Wed, 9 Sep 2020 at 20:53, Ralph Siemsen <ralph.siemsen at linaro.org> wrote:

> Hi Jasper,
>
> On Wed, Sep 09, 2020 at 07:03:58PM +0200, Jasper van Santen wrote:
> >
> >I am sorry to ask such a basic question, but i really can't find any
> >documentation on the commands possible in scripting.
> >Documentation of Hush and its commands i can't find.
>
> The hush shell gives you the ability to do loops/conditionals. It uses
> the same syntax as most Linux/unix shells, such as ash/bash/dash. You
> will find many tutorials/documents online for these. Some examples:
> https://www.xilinx.com/video/soc/u-boot-hush-shell-scripting.html
> https://www.man7.org/linux/man-pages/man1/dash.1.html
> Keep in mind that some more fancy features may not be supported in the
> u-boot hush shell.
>
> As far as official documentation, I am only aware of brief mention
> in https://github.com/u-boot/u-boot/blob/master/README#L3530
>
> The other aspect is the commands which can be run. This depends on how
> you configure your u-boot, eg. the CONFIG_CMD_* parameters. You can get
> a brief overview of commands by typing "help" at the u-boot prompt. And
> somewhat more help by typing "help <cmdname>".
>
> Hope this helps,
> Ralph
>