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@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