Using BackupPC to archive backups via SFTP

#!/usr/bin/env csh
# Create temporary directory
mkdir -p /tmp/backuppc-archive

# Clean previous archive, if any
rm "/tmp/backuppc-archive/$4.$5.tar$7"

# Call BackupPC_archiveHost
BackupPC_archiveHost "$1" "$2" "$3" "$4" "$5" "$6" "$7" "$8" "/tmp/backuppc-archive" "${10}" "${11}"

# Copy to SFTP
scp "/tmp/backuppc-archive/$4.$5.tar$7" user@host:/

# Remove temporary archive
rm "/tmp/backuppc-archive/$4.$5.tar$7"

To use this, save the script, set its executable flag, and configure BackupPC to use it instead of the default script - either in the global config.pl or a client-specific config:

$Conf{ArchiveClientCmd} = '/path/to/script/above.sh $tarCreatePath $splitpath $parpath $host $backupnumber $compression $compext $splitsize $archiveloc $parfile *';