Perform setgrp $1 $2 $3 to $4 instructions
Have an interactive interface (y/n), after interaction
Output the contents of the corresponding

Personal writing (wrong) :, every brother please give advice or comments!!!!!
#! Bin/sh
Mess=$(echo y | setgrp $1, $2 $3 to $4)
Echo $mess & gt; Filename

Results cannot save to file filename,, help me teach