#!/bin/sh
#
# mail-incremental.sh v1.5
# TiChou <tichou@tichou.org>

BACKUPDIR="/data/backup"

DAY="`date +%e`"
LEVEL=$[(${DAY}-1)/6]

umask 037

# mail
ARCHIVE="$BACKUPDIR/archives/mail-inc-level-$LEVEL.tar.gz"
chattr -i "$ARCHIVE"{,.md5}
: > "$BACKUPDIR/conf/mailstamp.start"
star -cz -sparse -link-dirs -fifo \
	-no-statistics -silent errctl="$BACKUPDIR/conf/errctl" \
	-dump newer="$BACKUPDIR/conf/mailstamp" \
	pat='*/.maildir{%!-*}/*' \
	pat='*/{M!m}ail/*' \
	C=/ /home/*/{.maildir*,mail,Mail} /var/vpopmail/domains /var/qmail/alias > "$ARCHIVE"
md5sum "$ARCHIVE" > "$ARCHIVE.md5"
chattr +i "$ARCHIVE"{,.md5}
mv "$BACKUPDIR/conf/mailstamp.start" "$BACKUPDIR/conf/mailstamp"