diff options
| -rw-r--r-- | handlers/maildir | 121 |
1 files changed, 109 insertions, 12 deletions
diff --git a/handlers/maildir b/handlers/maildir index c07cd7e..2ea94ff 100644 --- a/handlers/maildir +++ b/handlers/maildir @@ -1,12 +1,18 @@ -#!/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. # +# if destdir is /backup/maildir/, then it will contain the files +# daily.1 +# daily.2 +# daily.3 +# weekly.1 +# weekly.2 +# monthly.1 +# if keepdaily is 3, keepweekly is 2, and keepmonthly is 1. +# ############################################################## getconf rotate yes @@ -14,8 +20,9 @@ getconf remove yes getconf loadlimit 5 getconf speedlimit 0 -getconf keepdaily 7 -getconf keepweekly 4 +getconf keepdaily 5 +getconf keepweekly 3 +getconf keepmonthly 1 getconf srcdir /var/maildir getconf destdir @@ -23,6 +30,10 @@ getconf desthost getconf destport 22 getconf destuser +# strip trailing / +destdir=${destdir%/} +srcdir=${srcdir%/} + # used for testing getconf letter getconf user @@ -47,6 +58,14 @@ fi ################################################################## ### FUNCTIONS +# remote run the args remotely +function rrun() { + debug ssh -o PasswordAuthentication=no $desthost -l $destuser $@ + if [ ! $test ]; then + debug ssh -o PasswordAuthentication=no $desthost -l $destuser $@ + fi +} + function do_letters() { for i in a b c d e f g h i j k l m n o p q r s t u v w x y z; do do_maildirs "$srcdir/$i" @@ -91,7 +110,7 @@ function do_remove() { for i in a b c d e f g h i j k l m n o p q r s t u v w x y z; do ls -1 "$srcdir/$i" | sort > $tmp1 - ssh -p $destport $desthost 'ls -1 '$destdir/maildir/$i' | sort > $tmp2 + 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 @@ -101,27 +120,105 @@ function do_remove() { rm $tmp2 } +function do_rotate() { + backuproot=$destdir + now=`date %s` + seconds_daily=86400 + seconds_weekly=604800 + seconds_monthly=2628000 + + ssh -o PasswordAuthentication=no $desthost -l $destuser <<EOF + keepdaily=$keepdaily + keepweekly=$keepweekly + keepmonthly=$keepmonthly + + for rottype in daily weekly monthly; do + seconds=\`echo seconds_\${rottype}\` + + dir="$backuproot/\$rottype" + if [ ! -d \$dir.1 ]; then + echo "Warning: \$dir.1 does not exist. This backup is missing, so we are skipping the rotation." + continue + elif [ ! -f \$dir.1/created ]; then + echo "Warning: \$dir.1/created does not exist. This backup may be only partially completed, so we are skipping the rotation." + continue + fi + + # Rotate the current list of backups, if we can. + oldest=\`ls -d $\dir.* | sed 's/^.*\.//' | sort -n | tail -1\` + for (( i=\$oldest; i > 0; i-- )); do + if [ -d \$dir.\$i ]; then + if [ -f \$dir.\$i/rotated ]; then + rotated=\`tail -1 \$dir.\$i/rotated\` + else + rotated=0 + fi + cutoff_time=\$(( now - (seconds*i) )) + if [ \$rotated -gt \$cutoff_time ]; then + next=\$(( i + 1 )) + echo "mv \$dir.\$i \$dir.\$next" + mv \$dir.\$i \$dir.\$next + date +%c%n%s > \$dir.\$next/rotated + else + echo "Info: skipping rotation of \$dir.\$i because it was already rotated within the last " \$((cutoff_time/86400)) " days." + fi + fi + done + done + + max=\$((keepdaily+1)) + if [ ( \$keepweekly -a -d $backuproot/daily.\$max ) -a ! -d $backuproot/weekly.1 ]; then + echo mv $backuproot/daily.\$max $backuproot/weekly.1 + mv $backuproot/daily.\$max $backuproot/weekly.1 + date +%c%n%s > $backuproot/weekly.1/rotated + fi + + max=\$((keepweekly+1)) + if [ ( \$keepmonthly -a -d $backuproot/weekly.\$max ) -a ! -d $backuproot/monthly.1 ]; then + echo mv $backuproot/weekly.\$max $backuproot/monthly.1 + mv $backuproot/weekly.\$max $backuproot/monthly.1 + date +%c%n%s > $backuproot/monthly.1/rotated + fi + + for rottype in daily weekly monthly; do + max=\`echo keep\${rottype}\` + max=\$((max+1)) + dir="$backuproot/\$rottype" + oldest=\`ls -d $\dir.* | sed 's/^.*\.//' | sort -n | tail -1\` + + # if we've rotated the last backup off the stack, remove it. + for (( i=\$oldest; i >= \$max; i-- )); do + if [ -d \$dir.\$i ]; then + echo "Info: removing \$dir.\$i" + rm -rf \$dir.\$i + fi + done + done +EOF +} + + ### ################################################################## ### ROTATE BACKUPS ### -if [ "$remove" == "yes" ]; then - +if [ "$rotate" == "yes" ]; then + do_rotate fi ### REMOVE OLD MAILDIRS ### -if [ "$rotate" == "yes" ]; then - +if [ "$remove" == "yes" ]; then + debug remove fi ### ROTATE BACKUPS ### if [ "$letter" != "" ]; then - + debug letter fi if [ "$user" != "" ]; then - + debug user fi |