87 lines
2.1 KiB
Bash
87 lines
2.1 KiB
Bash
#!/usr/bin/env zsh
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# Default config file
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default_cfg='/usr/local/etc/backup.cfg'
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# Default date postfix
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default_postfix=$(date +%F-%H%M)
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function err
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{
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[[ -n $2 ]] && echo $2 >&2
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return $1
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}
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function default_ports
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{
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if [[ -z $port_remote ]]; then
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case $protocol in
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('ftp') remote_port='21';;
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('sftp'|'ssh') remote_port='22';;
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(*) err 1 "$protocol is not a valid value for the protocol option.";;
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esac
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fi
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}
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function generate_fullpath
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{
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src_basename=${src_fullpath:t}
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src_basedir=${src_fullpath:h}
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if [[ -s $snap_file ]]; then
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backup_type='incr'
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else
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backup_type='full'
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fi
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if [[ -z $backup_directory && $protocol != 'ssh' ]]; then
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err 1 "You have not set the backup directory path."
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elif [[ -z $backup_filename ]]; then
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outfile="$backup_directory/$host_local\-$src_basename\_$postfix\_$backup_type.t${compress_format:-ar}"
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else
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outfile=$backup_filename
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fi
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}
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function compress # compress to stdout
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{
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case $compress_format in
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('xz') compress_flag='J' ;;
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('bz2') compress_flag='j' ;;
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('gz') compress_flag='z' ;;
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('') unset compress_flag; unset compress_format ;;
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(*) err 1 "$compress_format is not a valid value for the compression format option.";;
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esac
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if [[ -n $exclude_list ]]; then
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if [[ -r $exclude_list ]]; then
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exclude_option='-X'
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else
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err 1 "Exclusion list $exclude_list is either unreadable or does not exist."
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fi
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fi
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if [[ -n $snap_file && -n $incremental_backup ]]; then
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if printf '' >> $snap_file; then
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snapshot_option='-g'
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else
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err 1 "Snapshot file $snap_file cannot be written."
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fi
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fi
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tar cf$compress_flag - -C $src_basedir $src_basename $snapshot_option $snapshot_file $exclude_option $exclude_list --ignore-failed-read
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}
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function encrypt # encrypt if encryption is needed
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{
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if [[ -n $gnupg_key ]]; then
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gpg -r $gnupg_key -e -
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else
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read _
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print $_
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fi
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}
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function store # store to local or remote
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{
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case $protocol in
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('local') dd of=$outfile ;;
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('ssh') ssh -p$port_remote $user_remote@$host_remote "dd of=$outfile" ;;
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('sftp'|'ftp'|'ftps') curl -ksS -T - $protocol://$host_remote:$port_remote/$outfile -u $user_remote:$pass_remote ;;
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(*) err 1 'Wrong protocol!' ;;
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esac
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}
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