Set environment variable on remote target

[Jie Zhang]

Andreas Schwab wrote:
> Jie Zhang <jie.zhang@analog.com> writes:
> 
>> Andreas Schwab wrote:
>>> Jie Zhang <jie.zhang@analog.com> writes:
>>>
>>>> @@ -261,7 +262,11 @@ proc rsh_exec { boardname program pargs inp outp } {
>>>>  	set inp "/dev/null"
>>>>      }
>>>>  -    set ret [local_exec "$RSH $rsh_useropts $hostname sh -c '$program
>>>> $pargs \\; echo XYZ\\\${?}ZYX'" $inp $outp $timeout]
>>>> +    set remote_envs ""
>>>> +    foreach envvar [array names remote_env] {
>>>> +	set remote_envs "$remote_envs $envvar=$remote_env($envvar)"
>>> That needs to do proper quoting to protect shell meta characters.
>>>
>> Thanks for pointing out this. A new patch is attached. Is the quoting right?
> 
> That won't protect all meta characters.  Inside double quotes the dollar
> sign, backslash and backquote are still special.
> 
So we have to use single quotes. The updated patch is attached.

Thanks,
Jie
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