Arq Backup Check

arq-check.sh

#!/bin/bash
#
# Use with Arq Backup www.arqbackup.com
# To check backup complete marker files in Amazon AWS S3
# See related script that writes these files arq-complete.sh:
#   https://gist.github.com/prenagha/f11e0b800d7f1a5733dab1289febad51
#
set -e

trap 'notify' INT TERM ERR

function notify {
  msg=$1
  if [ -z "$1" ]
  then
    msg="Failed checking ${bset}"
  fi
  /usr/local/bin/terminal-notifier  \
    -title "Arq Backup Check" \
    -message "${msg}" \
    -sound default \
    -activate com.haystacksoftware.Arq \
    -sender com.haystacksoftware.Arq
}

files="xxx.main.txt xxx.main.txt"
for file in ${files}
do
  bset=`basename ${file} .txt`
  tmp=/tmp/arq-check-${file}
  bucket=xxxxx
  resource="/${bucket}/${file}"
  contentType="text/plain"
  dateValue=`/bin/date "+%a, %d %b %Y %H:%M:%S %z"`

  stringToSign="GET\n\n${contentType}\n${dateValue}\n${resource}"
  s3Key=xxxxxx
  s3Secret="xxxxxx"

  signature=`echo -en ${stringToSign} | /usr/bin/openssl sha1 -hmac ${s3Secret} -binary | /usr/bin/base64`

  echo "000" > "${tmp}"
  /usr/bin/curl --silent --fail --output "${tmp}" \
    -H "Host: ${bucket}.s3.amazonaws.com" \
    -H "Date: ${dateValue}" \
    -H "Content-Type: ${contentType}" \
    -H "Authorization: AWS ${s3Key}:${signature}" \
    https://${bucket}.s3.amazonaws.com/${file}

  tooOld=`date -v-2w +%s | bc`
  last=`head -1 ${tmp} | bc`
  if [ "${last}" -lt "${tooOld}" ]
  then
    notify "Stale ${bset} `date -r ${last} +%m/%d/%Y`"
  fi
done
exit 0