X-Git-Url: https://hackdaworld.org/gitweb/?p=outofuni%2Fbackup.git;a=blobdiff_plain;f=bin%2Fbackup;h=4489388ed213b91a74d9e4f515bca478bc3e84be;hp=f69dfa02f70bade18eb36ddb24eb6763fe796404;hb=49bb0cd550add3fc0a2339c555daf7f94c8ff83b;hpb=1886f8c05a4588aef021fec4c9868a955d4e8040

diff --git a/bin/backup b/bin/backup
index f69dfa0..4489388 100755
--- a/bin/backup
+++ b/bin/backup
@@ -1,5 +1,10 @@
 #!/bin/bash
 
+function log {
+	conf=`basename $config | sed 's/\.conf$//'`
+	[ "$dolog" = "1" ] && echo "`date` - $@" >> $logdir/${conf}.log
+}
+
 if [ -z "$1" ]; then
 	echo usage: $0 configfile
 	exit -1
@@ -13,6 +18,7 @@ fi
 config=$1
 
 host=`grep ^host $config | cut -d ' ' -f 2`
+aliases="`grep ^aliases $config | cut -d ' ' -f 2-`"
 user=`grep ^user $config | cut -d ' ' -f 2`
 homedirs="` grep ^homedirs $config | cut -d ' ' -f 2-`"
 extradirs="`grep ^extradirs $config | cut -d ' ' -f 2-`" 
@@ -20,65 +26,176 @@ replicas=`grep ^replicas $config | cut -d ' ' -f 2`
 oldest=`grep ^oldest $config | cut -d ' ' -f 2`
 data=`grep ^data $config | cut -d ' ' -f 2`
 bandwidth=`grep ^bandwidth $config | cut -d ' ' -f 2`
+bwconn="`grep ^bandwidth $config | cut -d ' ' -f 3-`"
+compression=`grep ^compression $config | cut -d ' ' -f 2`
+compconn="`grep ^compression $config | cut -d ' ' -f 3-`"
+cipher=`grep ^cipher $config | cut -d ' ' -f 2`
+ciconn=`grep ^cipher $config | cut -d ' ' -f 3-`
+logdir=`grep ^logdir $config | cut -d ' ' -f 2`
 
-ping -c1 $host > /dev/null 2>&1
-ret=$?
+dolog=0
+if [ ! -z "$logdir" ]; then
+	mkdir -p $logdir
+	[ -d $logdir ] && dolog=1
+fi
 
-if [ "$ret" = "0" ]; then
-	echo "host $host is online ..."
-else
-	echo "host $host unreachable ..."
+hit=0
+for conn in $host $aliases; do
+	ping -c1 $conn > /dev/null 2>&1
+	ret=$?
+	if [ "$ret" = "0" ]; then
+		remote=$conn
+		break
+	fi
+done
+if [ -z "$remote" ]; then
+	log "host $host ($aliases) unreachable ..."
 	exit -3
+else
+	log "host $host (via $remote) is online ..."
+fi
+
+if [ ! -z "`ssh $user@$remote 'cat ~/.backup | grep ^no'`" ]; then
+	log "backup rejected by client ..."
+	exit 0
+fi
+
+comp=6
+if [ ! -z "$compression" ]; then
+	comp=$compression
+	for cpair in "$compconn"; do
+		ch=`echo $cpair | cut -d ':' -f 1`
+		if [[ "$remote" == "$ch"* ]]; then
+			cl=`echo $cpair | cut -d ':' -f 2`
+			[[ "$cl" == [0-9] ]] && comp=$cl
+		fi
+	done
+fi
+rcomp="-z --compress-level $comp"
+log using compression level $comp ...
+
+bw=0
+if [ ! -z "$bandwidth" ]; then
+	bw=$bandwidth
+	for bwpair in "$bwconn"; do
+		ch=`echo $bwpair | cut -d ':' -f 1`
+		if [[ "$remote" == "$ch"* ]]; then
+			bwl=`echo $cpair | cut -d ':' -f 2`
+			[ ! -z "$bwl" ] && bw=$bwl
+		fi
+	done
+fi
+rbw="--bwlimit=$bw"
+log applying bandwidth of $bw ...
+
+ciph=""
+if [ ! -z "$cipher" ]; then
+	ciph=$cipher
+	for cipair in "$ciconn"; do
+		ch=`echo $cipair | cut -d ':' -f 1`
+		if [[ "$remote" == "$ch"* ]]; then
+			cl=`echo $cipair | cut -d ':' -f 2`
+			[ ! -z "$cl" ] && ciph=$cl
+		fi
+	done
+fi
+if [ ! -z "$ciph" ]; then
+	log using cipher $ciph ...
 fi
 
 if [ ! -d $data ]; then
-	echo "no data directory ..."
+	log no data directory ...
 	exit -4
 fi
+log backing up to $data ...
 
 today=`date -I`
 backupdir=$data/${user}_at_${host}
-
 cbd=$backupdir/$today
-mkdir -p $cbd
-
-rsync="rsync -azR --delete --bwlimit=$bandwidth"
 
 ob=""
+lpb=""
 for pb in $backupdir/[0-9]*; do
+	[ ! -d $pb ] && continue
 	bdd=`basename $pb`
 	if [ ! -f $backupdir/.$bdd ]; then
 		if [ "$pb" != "$cbd" ]; then
 			rm -rf $cbd
 			mv $pb $cbd
+			log continuing $pb as $cbd ...
 		fi
-
-		rsrc=""
-		for dir in $homedirs; do
-			rsrc="$rsrc :/home/$user/$dir"
-		done
-		rsrc="`echo $rsrc | sed 's/^\ //'`"
-		for dir in $extradirs; do
-			rsrc="$rsrc :$dir"
-		done
-		$rsync $user@$host$rsrc $cbd
-		ret=$?
-		[ "$ret" != "0" ] && exit -50
-		touch $backupdir/.$pb
+	else
+		lpb=$pb
+		ob="$ob $pb"
 	fi
-	ob="$ob $pb"
 done
 
+
+if [ ! -d $cbd ]; then
+	if [ ! -z "$lpb" ]; then
+		cp -r $lpb $cbd
+		log starting backup $today from $lpb ...
+	else
+		mkdir -p $cbd
+		log starting backup $today from scratch ...
+	fi
+fi
+
+if [ ! -f $backupdir/.$today ]; then
+	rsrc=""
+	for dir in $homedirs; do
+		rsrc="$rsrc :/home/$user/$dir"
+	done
+	rsrc="`echo $rsrc | sed 's/^\ //'`"
+	for dir in $extradirs; do
+		rsrc="$rsrc :$dir"
+	done
+	[ ! -z "$homedirs" ] && \
+		log backing up home directories $homedirs ...
+	[ ! -z "$extradirs" ] && \
+		log backing up directories $extradirs ...
+
+	if [ -z "$ciph" ]; then
+		rsync=(rsync -aR $rcomp --delete $rbw $user@$remote$rsrc $cbd)
+	else
+		rsync=(rsync -aR -e "ssh -c $ciph" $rcomp --delete)
+		rsync+=($rbw $user@$remote$rsrc $cbd)
+	fi
+	"${rsync[@]}"
+
+	ret=$?
+	if [ "$ret" != "0" ]; then
+		log backup terminated before completion ...
+		exit -50
+	fi
+	
+	touch $backupdir/.$today
+	log "backup $today completed :)"
+else
+	log backup $bdd found completed ...
+fi
+
+[ -z "$replicas" ] && replicas=3
+[ -z "$oldest" ] && oldest=0
+
 cob=`echo $ob | wc -w`
 if [ $cob -gt $replicas ]; then
 	((numdel=cob-replicas))
 	todel="`echo $ob | cut -d ' ' -f 1-${numdel}`"
-	echo "to delete: $todel"
-	#for dirdel in $todel; do
-	#	bdd=`basename $dirdel`
-	#	rm -r $dirdel
-	#	rm $backupdir/$bdd
-	#done
+	for dirdel in $todel; do
+		past=`basename $dirdel`
+		ns=`date --date="$today" +%s`
+		ps=`date --date="$past" +%s`
+		((delta=(ns-ps)/86400))
+		if [ $delta -gt $oldest ]; then
+			log "deleting $dirdel ($delta days old) ..."
+			bdd=`basename $dirdel`
+			rm -r $dirdel
+			rm $backupdir/.$bdd
+		else
+			log "keeping $dirdel ($delta days old) ..."
+		fi
+	done
 fi
 
 exit 0