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#!/usr/local/bin/bash
# DO NOT USE THIS SCRIPT
# It is in a state of hot garbage and will probably be deleted soon
print_help_and_exit() {
echo "Please run this program with a source and a target dataset name as arguments"
echo "e.g. $0 zpool/dataset1 zpool/dataset2"
exit
}
SIMULATION=0
args=$(getopt n $*)
test $? == 0 || print_help_and_exit
set -- $args
while :; do
sleep 1
echo $1
case "$1" in
--) shift; break ;;
-n) SIMULATION=1 ; shift ;;
esac
done
DATASET_ROOT=$1
DATASET_TARGET=$2
if ! zfs get mountpoint $DATASET_TARGET >/dev/null; then
echo "Dataset $DATASET_TARGET does not exist and will be created."
echo "You have 10 seconds to abort this with CTRL-C"
sleep 10
if ! $SIMULATION; then
zfs create $DATASET_TARGET
fi
fi
if zfs get -H -t filesystem -o name,value -r snapdir zeus/data/projects | grep -v visible >/dev/null; then
echo Please make all snapdirs visible:
zfs get -H -t filesystem -o name,value -r snapdir zeus/data/projects
exit 2
fi
MOUNTPOINT_TARGET=$(zfs get -o value -H mountpoint $DATASET_TARGET)
test ${SIMULATION:0} = 1 && test $MOUNTPOINT_TARGET == "" && MOUNTPOINT_TARGET="datapool/simulation"
test -d "$MOUNTPOINT_TARGET" || print_help_and_exit
# make sure, that ctrl-c also works in the inner loops
trap exit INT
# recursively contains all snapshot names (the part after the @) from root on, sorted and only once
SNAPSHOTS=$(zfs list -H -oname -tsnap -r $DATASET_ROOT | cut -d@ -f2 | sort -u)
DATASETS=$(zfs list -H -oname -t filesystem -r $DATASET_ROOT)
test "${SIMULATION:-0}" = 1 && echo "SIMULATION MODE"
$DATASETS
echo "We are going to flatten the hierachy of this dataset:"
printf "\t%s\n" $DATASETS
echo -e "into the dataset with the name:"
echo -e "\t$DATASET_TARGET"
echo -e "mounted under:"
echo -e "\t$MOUNTPOINT_TARGET"
echo -e "with the following snapshots:"
printf "\t%s\n" $SNAPSHOTS
echo ""
echo "You have 10 seconds to abort this with CTRL-C"
sleep 10
set -- $SNAPSHOTS
SNAPSHOTS_TOTAL=$#
SNAPSHOT_CURRENT=0
set -- $DATASETS
shift
SUBDATASETS=$@
for SNAPSHOT in $SNAPSHOTS; do
echo ""
echo ""
SNAPSHOT_CURRENT=$((SNAPSHOT_CURRENT + 1))
echo "[$SNAPSHOT_CURRENT/$SNAPSHOTS_TOTAL] Next snapshot is: $SNAPSHOT"
for DATASET in $SUBDATASETS; do
DATASET_RELATIVE=${DATASET##$DATASET_ROOT}
MOUNTPOINT=$(zfs get -H -o value mountpoint $DATASET)
echo "RELATIVE=$DATASET_RELATIVE"
if [[ $MOUNTPOINT == "legacy" ]]; then
MOUNTPOINT=$(findmnt -n -o target $DATASET)
if test -d $MOUNTPOINT; then
>&2 echo "Dataset has a legacy mountpoint, but was not found in the fstab: $DATASET"
continue
fi
fi
if [[ $MOUNTPOINT == "-" ]]; then
>&2 echo "Dataset does not have a mount point or is a vdev: $DATASET"
continue
fi
SNAPDIR=$MOUNTPOINT/.zfs/snapshot/$SNAPSHOT
if test -d $SNAPDIR; then
TARGET_DIR="${MOUNTPOINT_TARGET}${DATASET_RELATIVE}"
echo -e \\trsync --info=stats3 --delete -a "$SNAPDIR/" "$TARGET_DIR/"
if test "${SIMULATION:-0}" = 0; then
mkdir -p "$TARGET_DIR"
if ! rsync --info=stats3 --delete -a "$SNAPDIR/" "$TARGET_DIR/" ; then
>&2 echo "rsync could not entirely copy from $SNAPDIR to $DATASET_TARGET"
fi
fi
else
echo -e "\tSKIP: Snapshot $SNAPSHOT does not exist for dataset $DATASET"
fi
done
NEW_SNAPSHOT="$DATASET_TARGET@$SNAPSHOT"
echo ""
echo -e "\t> Concluding snapshot: ${NEW_SNAPSHOT} <"
echo ""
if test "${SIMULATION:-0}" = 0; then
zfs snap $NEW_SNAPSHOT
fi
done
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