separo funciones, creo variable DATE e inserto mas checks

zonebackuptozone.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/bash
 
+DATE=`date +%Y%m%d`
+
 usage()
 {
     echo "Usage: $0 [ -s hostname ] [ -z UUID ] [ -b backupzone ] [ -i idbackupzone ]" >&2
@@ -56,59 +58,111 @@ check_err()
 check_snap()
 {
     ZONE=$1
-    echo "Checking for snapshot of ${ZONE}..."
-    zfs list -t snapshot zones/${ZONE}@`date +%Y%m%d` 2>/dev/null 1>&2
+    echo "Checking for local snapshot of ${ZONE}..."
+    zfs list -t snapshot zones/${ZONE}@${DATE} 2>/dev/null 1>&2
+}
+
+check_remote_snap()
+{
+    DATASET=$1
+    echo "Checking for an existing remote snapshot of ${DATASET}..."
+    ssh -i /usbkey/ssh/id_rsa -p 2221 $BACKUPZ zfs list zones/${IDBACKUPZ}/data/${SOURCEGZ}/${DATASET}@${DATE} 2>/dev/null 1>&2
+}
+
+check_remote_dataset()
+{
+    DATASET=$1
+    echo "Checking for an existing remote dataset of ${DATASET}..."
+    ssh -i /usbkey/ssh/id_rsa -p 2221 $BACKUPZ zfs list zones/${IDBACKUPZ}/data/${SOURCEGZ}/${DATASET} 2>/dev/null 1>&2
 }
 
 create_snap()
 {
     DS=$1
     echo "Creating snapshot of ${DS}..."
-    zfs snapshot zones/${DS}@`date +%Y%m%d`
+    zfs snapshot zones/${DS}@${DATE}
     check_err
     echo "done."
 }
 
-send_snap ()
+delete_local_snap()
 {
     DATASET=$1
-    echo "Deleting dataset ${DATASET} on ${BACKUPZ}..."
-    ssh -i /usbkey/ssh/id_rsa -p 2221 $BACKUPZ zfs destroy -r zones/${IDBACKUPZ}/data/${SOURCEGZ}/${DATASET}
+    echo "Deleting local snapshot zones/${DATASET}@${DATE}..."
+    zfs destroy zones/${DATASET}@${DATE}
     check_err
     echo "done."
-    echo "Sending snapshot to ${BACKUPZ}..."
-    zfs send zones/${DATASET}@`date +%Y%m%d` | ssh -i /usbkey/ssh/id_rsa -p 2221 $BACKUPZ zfs receive -F zones/${IDBACKUPZ}/data/${SOURCEGZ}/${DATASET}
+}
+
+delete_remote_dataset()
+{
+    DATASET=$1
+    echo "Deleting remote dataset ${DATASET} on ${BACKUPZ}..."
+    ssh -i /usbkey/ssh/id_rsa -p 2221 $BACKUPZ zfs destroy -r zones/${IDBACKUPZ}/data/${SOURCEGZ}/${DATASET} 2>/dev/null 1>&2
     check_err
     echo "done."
-    echo "Deleting snapshot on ${BACKUPZ}..."
-    ssh -i /usbkey/ssh/id_rsa -p 2221 $BACKUPZ zfs destroy zones/${IDBACKUPZ}/data/${SOURCEGZ}/${DATASET}@`date +%Y%m%d`
+}
+
+delete_remote_snap()
+{
+    DATASET=$1
+    echo "Deleting remote snapshot zones/${DATASET}@${DATE} on ${BACKUPZ}..."
+    ssh -i /usbkey/ssh/id_rsa -p 2221 $BACKUPZ zfs destroy -r zones/${IDBACKUPZ}/data/${SOURCEGZ}/${DATASET}@${DATE} 2>/dev/null 1>&2
     check_err
     echo "done."
-    echo "deleting local snapshot zones/${DATASET}@`date +%Y%m%d`..."
-    zfs destroy zones/${DATASET}@`date +%Y%m%d`
+}
+
+send_snap ()
+{
+    DATASET=$1
+    echo "Sending snapshot to ${BACKUPZ}..."
+    zfs send zones/${DATASET}@${DATE} | ssh -i /usbkey/ssh/id_rsa -p 2221 $BACKUPZ zfs receive -F zones/${IDBACKUPZ}/data/${SOURCEGZ}/${DATASET}
     check_err
     echo "done."
 }
 
 # main
 
+
 echo "---
 BACKUP_ZONE: ${IDBACKUPZ}
 BACKUP_ZONE_IP: ${BACKUPZ}
 UUID to backup: ${UUID}
+DATE of backup: ${DATE}
 ---"
 
 check_snap ${UUID}
-
 if [ $? -ne 0 ]; then
+    echo "There is no snapshot available of ${UUID}"
     create_snap ${UUID}
 else
     echo "Snapshot of ${UUID} already available"
     echo "done."
 fi
 
+check_remote_dataset ${UUID}
+if [ $? -eq 0 ]; then
+    delete_remote_dataset ${UUID}
+else
+    echo "There is no remote dataset of ${UUID}"
+    echo "done."
+fi
+
 send_snap ${UUID}
 
+check_remote_snap ${UUID}
+if [ $? -eq 0 ]; then
+    delete_remote_snap ${UUID}
+else
+    echo "There is no remote snapshot of ${UUID}"
+    echo "done."
+fi
+
+check_snap ${UUID}
+if [ $? -eq 0 ]; then
+    delete_local_snap ${UUID}
+fi
+
 # we check this UUID for additional datasets
 
 echo "Looking for addtional children datasets in ${UUID}..."