[U-Boot-Users] [PATCH] Propagate Error Status to the Shell on fw_printenv Errors

[Markus Klotzbücher]

Dear Grant,

Grant Erickson <gerickson at nuovations.com> writes:

> Changed implementation such that fw_printenv returns failure status when one or more specified variables do not exist or when incorrect command syntax is used.
>
> This aids scripting fw_printenv such that the script can key of the return status rather than relying on standard error "scraping".

Thank you, I think this is useful.

>   Tested On:
>     AMCC Kilauea
>
>   Tests Run:
> 	root at kilauea# fw_printenv
> 	bootdelay=5
> 	baudrate=115200
> 	...
> 	root at kilauea# echo $?
> 	0
> 	
> 	root at kilauea# fw_printenv -n hostname
> 	kilauea
> 	root at kilauea# echo $?
> 	0
> 	
> 	root at kilauea# fw_printenv -n hostname ipaddr
> 	## Error: `-n' option requires exactly one argument
> 	root at kilauea# echo $?
> 	1

But I don't understand what the purpose of the "-n" option is?

Best regards

Markus Klotzbuecher

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