#!/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="$1"
output="/var/local/emhttp/$share.$2"
pools=${3//,/ }
total=0;

echo "Computing disk usage for $share..."
rm -f "$output"

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

for pool in $pools; do
  check "/mnt/$pool" "$share"
done;
while IFS=$'\n' read -r disk; do
  check "$disk" "$share"
done <<< $(ls -vd /mnt/disk[0-9]*)
echo "disk.total=$total" >>"$output"
echo "total disk usage: $total"