60 lines
1.3 KiB
Bash
Executable file
60 lines
1.3 KiB
Bash
Executable file
#!/bin/sh
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if [[ -z "$1" || -z "$2" || -z "$3" ]] ; then
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echo "usage: $0 <ssh_remote> <remote_zfs_object> <local_zfs_object>" >&2
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exit 1
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fi
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timestamp () {
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t="`echo \"$1\" |sed -ne 's/^.*@zb-//p' |tr 'p_' '+ '`"
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[[ -z "$t" ]] && return 1
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date --date="$t" +%s
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return $?
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}
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ssh_remote="$1"
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remote_zfs="$2"
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local_zfs="$3"
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# find newest available and newest common snapshot
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newest="N/A"
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newest_common="N/A"
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ssh $ssh_remote "zfs list -t snapshot -r -d 1 -H \"${remote_zfs}\" " | awk '{print $1;}' | while read l ; do
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#link unix timestamps
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unixtime=`timestamp "$l"` || continue
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echo "$unixtime" "$l"
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done | sort -n | while read l ; do
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curtime=${l%% *}
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snapname=${l#* }
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newest="$snapname"
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if zfs list -t snapshot -H "${local_zfs}@zb-${snapname}" >/dev/null ; then
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newest_common="$snapname"
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fi
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done
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# some checks
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if [ "$newest" = "N/A" ] ; then
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echo "$0: no remote snapshots available to pull" >&2
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exit 2
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fi
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if [ "$newest" = "$newest_common" ] ; then
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echo "$0: nothing new to pull" >&2
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exit 0
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fi
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if [ "$newest_common" = "N/A" ] ; then
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#do a full send
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ssh $ssh_remote "zfs send \"${remote_zfs}@zb-${newest}\"" | zfs recv -F "${local_zfs}"
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exit $?
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else
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#do incremental send
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ssh $ssh_remote "zfs send -I \"${remote_zfs}@zb-${newest_common}\" \"${remote_zfs}@zb-${$newest}\"" | zfs recv -F "${local_zfs}"
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exit $?
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fi
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