#!/bin/bash

# Author: Alan J. Pippin
# Description: This script calls zfs-restore for each filesystem needing
#              to be restored (that was formerly replicated here) to another ZFS pool.

# source our configuration 
config="${0%/*}/zfs-scripts.conf"
[ -e "${config}.dist" ] && . ${config}.dist
[ -e "${config}" ] && . ${config}

# Setup some default values
logfile="$logdir/zfs-restore-all.log"

# Setup our output
if [[ -z "$SCRIPT_UNDER_TEST" ]]; then
    exec >> $logfile 2>&1
fi

cleanup_and_exit() {
  exit 1
}
trap cleanup_and_exit INT


# See if the user has a specific pool to restore in mind
restore_pool=$1

# Restore every ZFS filesystem we were told to replicate 
echo `date` ZFS restore started

# For each filesystem we are supposed to restore, do it
for filesystem in $filesystems_to_replicate; do
  dst_pool=${filesystem%%/*}
  dst_fs=${filesystem#*/}
  # Check to make sure the dst filesystem does not exist
  ssh $remote "$zfs list ${dst_pool}/${dst_fs}" > /dev/null 2>&1
  if [ $? != 0 ]; then
    echo "$filesystem" | grep -q "$restore_pool" 
    if [ $? == 0 ]; then
      # This filesystem matches our restore pool pattern 
      echo `date` Restoring $filesystem to $remote
      zfs-restore $local_pool $filesystem $dst_pool $dst_fs $remote
    fi
  else
    echo "-I- Filesystem already exists on destination. Skipping: $filesystem"
  fi 
done

# All done
echo `date` ZFS restore complete