diff --git a/upsnapz.sh b/upsnapz.sh
index 6a2bed1..2358dc5 100755
--- a/upsnapz.sh
+++ b/upsnapz.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Time-stamp: <2025-02-25 06:36:02 nomad>
+# Time-stamp: <2025-02-26 08:02:52 nomad>
 
 # Michel Le Cocq <lecocq@ipgp.fr>
 #                <nomad@neuronfarm.net>
@@ -70,6 +70,20 @@
 # 
 # +------------------------------------------------------------------------------------------------+
 
+function showsnap
+{
+    zfs list -o name,used,usedbysnapshots -r zroot/ROOT -s creation | grep -v '^zroot/ROOT .*' > /tmp/upsnap.tmp
+    for line in $(cat /tmp/upsnap.tmp | grep zroot | cut -d' ' -f1)
+    do
+	nbr=$(zfs list -H -t snapshot -r $line | wc -l)
+	z=$(echo $line | cut -d'/' -f3)
+	sed -i "/$z/ s/$/ $nbr/" /tmp/upsnap.tmp
+    done
+    sed -i "/USEDSNAP/ s/$/ NBRSNAP/" /tmp/upsnap.tmp
+    cat /tmp/upsnap.tmp
+    rm /tmp/upsnap.*
+}
+
 function cleansnap
 {
    printf '\nClean snapshot.\n'
@@ -347,9 +361,10 @@ function usage()
 {
     echo "Usage: $(basename $0) [-h]"
     echo "-b : only check zfs boot menu"
+    echo "-s : only show zfs snap"
 }
 
-while getopts 'hb' OPTION; do
+while getopts 'hbs' OPTION; do
  case "$OPTION" in 
  h) 
      usage
@@ -360,6 +375,11 @@ while getopts 'hb' OPTION; do
      echo
      exit 1
      ;; 
+ s)
+     showsnap
+     echo
+     exit 1
+     ;; 
  ?) 
  usage
  exit 1