From: ianmdlvl <ianmdlvl>
Date: Wed, 7 Jun 2006 00:11:28 +0000 (+0000)
Subject: wip
X-Git-Tag: debian_version_4_1_0~7
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=chiark-utils.git;a=commitdiff_plain;h=e1335e736b64e6123950276c44dc8d82fc96b655

wip
---

diff --git a/backup/snaprsync b/backup/snaprsync
index a2bc96d..c9e77fd 100755
--- a/backup/snaprsync
+++ b/backup/snaprsync
@@ -11,6 +11,9 @@
 	rsharedir=/usr/share/chiark-backup 
 	retcdir=/etc/chiark-backup
 	rvardir=/var/lib/chiark-backup
+	bwlimit=
+
+set -e
 
 badusage () { echo >&2 "snaprsync: bad usage: $1"; exit 12; }
 x () { echo "+ $@"; "$@"; }
@@ -22,7 +25,7 @@ while true; do
 		value=${1#--*=}
 		case "$name" in
 		rhost|device|mountpoint|localarea);;
-		localprevious|rsharedir|retcdir|rvardir);;
+		localprevious|rsharedir|retcdir|rvardir|bwlimit);;
 		*) badusage "unknown setting $name";;
 		esac
 		eval "$name=\$value"
@@ -43,8 +46,10 @@ for name in rhost device mountpoint localarea; do
 done
 
 datefmt='%Y-%m-%d %H:%M:%S Z'
+rsync="rsync ${bwlimit:+--bwlimit} $bwlimit"
+export RSYNC_RSH='ssh -o compression=no'
 
-ssh $rhost "date -u '+$rhost $datefmt'"
+ssh $rhost "date -u '+$rhost $datefmt start'"
 ssh $rhost id
 ssh $rhost ls -d $rsharedir
 ssh $rhost ls -d $rvardir
@@ -53,26 +58,40 @@ test -d $localarea || x mkdir $localarea
 ournode=`uname -n`
 rsumsfile=for-$ournode.sums
 
+td=/dev/enoent
+rc=12
+trap 'rm -rf $td; exit $rc' 0
+td=`mktemp -td`
+
+mkfifo -m 600 $td/sentinel
+exec 4<>$td/sentinel
+
 x ssh $rhost "$rsharedir/snap-drop"
 x ssh $rhost "$retcdir/snap/$snapkind snap $rvardir $device $mountpoint"
-ssh $rhost "
-  set -ex
+ssh $rhost <$td/sentinel 4<&- "
+  set -e
+  date -u '+$rhost $datefmt main'
+  exec 3<&0 0</dev/null
+  (set +e; read x <&3; kill 0) &
   cd $rvardir
   umask 077
   exec 3>$rsumsfile
   cd snap-mount
-  summer -Cqf . >&3
-  date -u +'sums done $datefmt'
+  summer -Ctqf . | sort -t'	' -k2 >&3
+  test x"${PIPESTATUS[*]}" = 'x0 0'
+  date -u '+$rhost $datefmt sumsdone'
   cd ..
 " &
-fixme kill this thing if we die
 rsumpid=$!
-RSYNC_RSH='ssh -o compression=no' \
- x rsync -aHSxz --numeric-ids --delete \
+x $rsync -aHSxz --numeric-ids --delete \
 	${localprevious:+--link-dest} $localprevious \
 	$rhost:$rvardir/snap-mount/. $localarea/.
 wait $rsumpid
 x ssh $rhost "$rsharedir/snap-drop"
-RSYNC_RSH=ssh rsync -p 
- fixme use localprevious,rsums as seed if available
- $rhost:$rvardir/$rsumsfile $localarea,rsums
+
+if [ "x${localprevious}" != x ]; then
+	cp "$localprevious,rsums" "$localarea,rsums"
+fi
+x $rsync -p \
+	$rhost:$rvardir/$rsumsfile \
+	"$localarea,rsums"