Run commands using dmenu in st terminal

dmenu.sh

#!/bin/sh
# run commands in dmenu by adding ! at the end
# otherwise runs selected program

cmd="$(dmenu_path | dmenu -p "Run >" $@)" 
case $cmd in 
    *\! ) cmd=$(printf "%s" "${cmd}" | cut -d'!' -f1);
          st -e sh -c "${cmd};exec $SHELL";; 
	* )   ${cmd} ;; 
esac

# it first cuts the `!` and then
# runs st with sh with this command and then runs
# shell to enter shell and have command's output