How to Execute Unix Commands through CIW Window and Store the output in a variable on Unix/CIW Window (Rather than file)?

Hello Support,

I have one query regrading the Execution of Unix Commands through CIW Window. Currently i am using system or sh/shell Command and i am storing the output in a file . Can there be a way that We Can Store the output in a variable itself (Accessible form Unix/CIW Window).

The Query is that i want to have the layer Map File Path and I want to store it to a variable (Don't want output  to redirect to file and i don't want to read the file to get the path in a variable if possible)

; Getting the LayerMapFile Path and Storing in a file 

system("piGetInfo $DKITROOT lyrFilIn  >layermapfile.il")  

Above Command is working Fine and layermapfile.il is containing the LayerMapFile Path

;Getting the LayerMapFile Path and Storing in a Variable

system("setenv layerMapFile `piGetInfo $DKITROOT lyrFilIn` ")

Above Command is throwing a error :- sh: setenv: command not found

Can you please provide some help on this?

Thanks in Advance,

Regards

Sonu