Arq Backup Complete Marker

arq-complete.sh

#!/bin/bash
#
# Use with Arq Backup www.arqbackup.com
# To write a backup complete marker file to Amazon AWS S3
# Set as backup complete script in Arq settings for the backup destination
# See related script that checks these files arq-check.sh:
#  https://gist.github.com/prenagha/c5d6c2ebf3de0a4f61afdf3610e57363
#
arg=$1
if [ -z "${arg}" ]
then
  arg=main
fi
backupSet="`/bin/hostname -s`.`/usr/bin/whoami`.${arg}"
file=${backupSet}.txt
tmp=/tmp/arq-${file}
bucket=xxxxxx
resource="/${bucket}/${file}"
contentType="text/plain"
dateValue=`/bin/date "+%a, %d %b %Y %H:%M:%S %z"`

/bin/date +%s > ${tmp}
echo "${dateValue}" >> ${tmp}
/bin/hostname >> ${tmp}
/usr/bin/whoami >> ${tmp}
echo "${arg}" >> ${tmp}
echo "Arq `/usr/bin/defaults read /Applications/Arq.app/Contents/Info CFBundleVersion`" >> ${tmp}
/usr/bin/uname -a >> ${tmp}

 stringToSign="PUT\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`

/usr/bin/curl -X PUT -T "${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}