added monitorize_save_file

monitorize_save_file.sh

@@ -0,0 +1,39 @@
+#!/bin/bash
+
+readonly USAGE="
+USAGE:
+$(basename "$0") [FILE]"
+
+function help_message() {
+    echo "$USAGE"
+}
+
+# check if there is any parameter
+if [ "$#" -ne 1 ]; then
+    help_message
+    exit 0
+fi
+
+# check if the parameter is valid
+if ! test -f "$1"; then
+    echo "file $1 does not exist."
+    exit 0
+fi
+
+# variables
+readonly FILE_DIR="$(cd "$(dirname "$1")" && pwd)"
+readonly FILE="$(basename "$1")"
+
+OLD_DATE="$(date -r "$1" "+%Y-%m-%d_%H:%M:%S")"
+echo "${FILE}.${OLD_DATE}"
+cp "${FILE_DIR}/${FILE}" "${FILE_DIR}/${FILE}.${OLD_DATE}"
+
+while true; do
+    sleep 5
+    DATE="$(date -r "$1" "+%Y-%m-%d_%H:%M:%S")"
+    if [ "$DATE" != "$OLD_DATE" ]; then
+        echo "${FILE}.${DATE}"
+        cp "${FILE_DIR}/${FILE}" "${FILE_DIR}/${FILE}.${DATE}"
+        OLD_DATE=$DATE
+    fi
+done