View difference between Paste ID: CtTfvime and yVSnJn3U

 # Prints out the relative path between to absolute paths. Trivial.
 #
 # Parameters:
 # $1 = first path
 # $2 = second path
 #
 # Output: the relative path between 1st and 2nd paths
 relpath() {
     local pos="${1%%/}" ref="${2%%/}" down=''
 
     while :; do
         test "$pos" = '/' && break
         case "$ref" in $pos/*) break;; esac
         down="../$down"
         pos=${pos%/*}
     done
 
     echo "$down${ref##$pos/}"
 }