[U-Boot-Users] u-boot HUSH scripting using local variables.

[Leonid]

Hi:

In the http://www.denx.de/wiki/view/DULG/CommandLineParsing, chapter
14.2.11.2, bullet 3 from the top says:

" In the current implementation, the local variables space and global
environment variables space are separated. Local variables are those you
define by simply typing like name=value. To access a local variable
later on, you have to write '$name' or '${name}'; to execute the
contents of a variable directly you can type '$name' at the command
prompt."

...which implies that local variables can be used to save commands and
execute them later. It doesn't contradict with the statement in previous
bullet that 

"... only environment variables can be used with run  command"

since it merely states that "run <command>" format is invalid for local
variables, not that their execution itself is impossible.

Using local variables I could run some scripts indeed:

U-Boot$ scr='echo Hello World'
U-Boot$ $scr
Hello World
U-Boot$

U-Boot$ scr='a=100 b=200'
U-Boot$ $scr
U-Boot$ echo a=$a b=$b
a=100 b=200
U-Boot$

However it doesn't work for more complicated scripts:

U-Boot$ scr='for ii in 1 2 3; do echo ii=$ii; done;'
U-Boot$ $scr
Unknown command 'for' - try 'help'
U-Boot$

Same command, assigned using setenv is working:

U-Boot$ setenv sscr 'for ii in 1 2 3; do echo ii=$ii; done;'
U-Boot$ run sscr
ii=1
ii=2
ii=3
U-Boot$

Am I doing something wrong? U-boot version is 1.2.0 (official release,
not top of the git tree).

Thanks,

Leonid.