#!/bin/bash

# usage: share_size <user-share> <output-file>

# Creates an "ini" output file suitable for php parse_ini_function which describes
# the size <user-share> takes up on the cache disk and each data disk.  Since this
# uses the 'du' command, could take awhile.

share="$1"
output="$2"
total=0;

echo "Computing disk usage for $share..."

rm -f "$output"

function check {
  if [[ -e $1/$2 ]] ; then
    echo "calculating $1 usage..."
    size=$(du -s "$1/$2"|cut -f1)
    echo "$(basename $1)=$size" >> "$output"
    total=$(($total + $size))
  fi
}

check /mnt/cache "$share"
for disk in /mnt/disk* ; do
  check $disk "$share"
done
echo "total=$total" >>"$output"

echo "total disk usage: $total"