remote_fs=$2
remote_pool=${2%%/*}
+# return non-zero exit code if any command in the pipe fails
+set -o pipefail
+
# get the backup pool from the command line or the config file if not specified
if [[ -n $3 ]]; then
backup_pool=$3
grep ^${backup_pool}/${remote_fs}@ |
grep -v ^${backup_pool}/${current_backup_marker} |
awk "{gsub(/^$backup_pool./,\"\",\$1); print\$1}" > $local_list
-if [ $? != 0 ]; then
- fatal_and_exit "-E- local $zfs list on $hostname command failed" $mailto
-fi
+# If no local snapshots exist, we may need to send the entire filesystem, which we'll do later
+# So, no error check here as a non-zero return code means the local filesystem or snaps are missing
+# We'll catch this later on as a case where we need to send the entire filesystem
# Destroy the current backup marker snapshot on the remote system if it exists
grep -q ${current_backup_marker} $remote_list
# don't check the return codes here because these may not exist, and that is ok
$zfs destroy ${backup_pool}/${previous_backup_marker} > /dev/null 2>&1
$ssh $remote $zfs destroy ${previous_backup_marker} > /dev/null 2>&1
+sleep 1
# Rename the current backup marker to be the previous backup marker
$zfs rename ${backup_pool}/${current_backup_marker} ${backup_pool}/${previous_backup_marker}