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#!/usr/bin/php4 -q
<?php
###############################################################
#
# This handler slowly creates a backup of each user's maildir
# to a remote server. It is designed to be run with low overhead
# in terms of cpu and bandwidth so it runs pretty slow.
#
##############################################################
getconf rotate yes
getconf remove yes
getconf loadlimit 5
getconf speedlimit 0
getconf keepdaily 7
getconf keepweekly 4
getconf srcdir /var/maildir
getconf destdir
getconf desthost
getconf destport 22
getconf destuser
# used for testing
getconf letter
getconf user
[ -d $srcdir ] || fatal "source directory $srcdir doesn't exist"
[ ! $test ] || testflags="--dry-run -v"
rsyncflags="$testflags -e 'ssh -p $destport'"
flags_mail="$rsyncflags --archive --ignore-existing --delete --numeric-ids --size-only --bwlimit=$speedlimit"
flags_folders="$rsyncflags --archive --delete --numeric-ids"
excludes='--exclude ".Trash/*" --exclude ".Mistakes/*" --exclude ".Spam/*"'
# see if we can login
debug "ssh -o PasswordAuthentication=no $desthost -l $destuser 'echo -n 1'"
if [ ! $test ]; then
result=`ssh -o PasswordAuthentication=no $desthost -l $destuser 'echo -n 1' 2>&1`
if [ "$result" != "1" ]; then
fatal "Can't connect to $desthost as $destuser."
fi
fi
##################################################################
### FUNCTIONS
function do_letters() {
for i in a b c d e f g h i j k l m n o p q r s t u v w x y z; do
do_maildirs "$srcdir/$i"
done
}
function do_maildirs() {
local dir=$1
[ -d $dir ] || fatal "directory $dir not found."
for userdir in `ls -1 $dir`; do
do_userdir $userdir
done
}
function do_user() {
local user=$1
local letter=${user:0:1}
local dir="$srcdir/$letter/$user"
[ -d $dir ] || fatal "maildir $dir not found".
while 1; do
load=`uptime | sed 's/^.*load average: \\([^,]*\\).*$/\\1/'`
if [ $load -lt $loadlimit ]; then
info "load $load, sleeping..."
sleep 600
else
break
fi
done
cmd="rsync $maildirrsyncflags $excludes '$dir' '$destuser@$desthost:$destdir/maildir/$letter'"
debug $cmd
# ret=`rsync $maildirrsyncflags $excludes '$dir' '$destuser@$desthost:$destdir/maildir/$letter' 2>&1`
}
# remove any maildirs from backup which might have been deleted
# and add new ones which have just been created.
function do_remove() {
local tmp1=/tmp/maildirtmpfile$$
local tmp2=/tmp/maildirtmpfile$$
for i in a b c d e f g h i j k l m n o p q r s t u v w x y z; do
ls -1 "$srcdir/$i" | sort > $tmp1
ssh -p $destport $desthost 'ls -1 '$destdir/maildir/$i' | sort > $tmp2
for deluser in `join -v 2 $tmp1 $tmp2`; do
cmd="ssh -p $destport $desthost rm -vr '$destdir/maildir/$i/$deluser/'"
debug $cmd
done
done
rm $tmp1
rm $tmp2
}
###
##################################################################
### ROTATE BACKUPS ###
if [ "$remove" == "yes" ]; then
fi
### REMOVE OLD MAILDIRS ###
if [ "$rotate" == "yes" ]; then
fi
### ROTATE BACKUPS ###
if [ "$letter" != "" ]; then
fi
if [ "$user" != "" ]; then
fi
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