For now i got around this problem with a negative test set x

if test $x != 1 then echo "No"; else echo "Yes"; fi

with this if x is not present i get No, even in the case when x is present and set any other value (not 1) when i do "set x 1" and run the test again i get "Yes"

Thanks Sridhar

________________________________ From: Wolfgang Denk wd@denx.de To: Sridhar Addagada sridhar_a@yahoo.com Cc: "u-boot@lists.denx.de" u-boot@lists.denx.de Sent: Tuesday, January 24, 2012 4:13 PM Subject: Re: [U-Boot] u-boot script "test"

Dear Sridhar Addagada,

In message 1327396047.99588.YahooMailNeo@web120201.mail.ne1.yahoo.com you wrote:

What is the behavior of test command when the variable is not present in the uboot env

It should be the same as in any other bourne compatible shell.

set x

Note that "set" for "setenv" may or may not work, depending on your command selection.

if test $x = 1; then echo "Yes"; else echo "No"; fi

This should provoke an error from the "test" command which misses an argument.

in the above case I get Yes echoed back.

That's a bug then.  Patches welcome...

Is there any way to test the presence of a variable in uboot script?

This should be possible like in any other shell...

Best regards,

Wolfgang Denk