Re: [microblaze-uclinux] setenv in uClinux

[John Williams <jwilliams@xxxxxxxxxxxxxx>]

Leonid wrote:
> I basically want to be able to run u-boot HUSH script in the Linux
> shell. U-boot has "setenv" commands with effect, similar to that of bash
> "export" - it defines global variables, visible from everywhere:

export makes environment variables visible to *child* processes of the 
current process - not the parent process.

> setenv ipaddr 1.2.3.4
> echo $ipaddr
> 1.2.3.4


> I thought I'll write small application "setenv" which will be setting
> environment variables... Do you have a better idea?

In bash you can use "source"

*** ipaddr.sh ***
export ipaddr 1.2.3.4


# source ipaddr.sh
# echo $ipaddr
1.2.3.4

I'm not sure which shells support source.

Another option is to put in /etc/rc, that gets interpreted on startup 
and any environment variables placed there will be visible to the login 
shell

Finally you have the option of using temp files, in /var for example.

Regards,

John
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