occ_maintenance.sh: don't start if script is already running.

occ_maintenance.sh

@@ -11,7 +11,8 @@ snippet_dir="${script_dir}/snippets"
 declare -a unsorted_website_arr
 declare -a website_arr
 
-log_file="$(mktemp)"
+LOCK_DIR="/tmp/${script_name%%.*}.LOCK"
+log_file="${LOCK_DIR}/${script_name%%.*}.log"
 
 backup_date=$(date +%Y-%m-%d-%H%M)
 
@@ -61,7 +62,7 @@ usage() {
 clean_up() {
 
    # Perform program exit housekeeping
-   rm -f $log_file
+   rm -f "$LOCK_DIR"
    blank_line
    exit $1
 }
@@ -191,10 +192,53 @@ fi
 # - Jobhandling 
 # ----------
 
-# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
+if pgrep -f "$(basename $0)" | grep -v $$ ; then 
+
+   msg="A previos instance of script \"`basename $0`\" seems already be running."
+
+   echo ""
+   if $terminal ; then
+      echo -e "[ \033[31m\033[1mFatal\033[m ]: $msg"
+      echo ""
+      echo -e "           \033[31m\033[1mScript was interupted\033[m!"
+   else
+      echo "   [ Fatal ]: $msg"
+      echo ""
+      echo "              Script was interupted!"
+   fi
+   echo
+
+   exit 1
+fi
+
+
+# - If job already runs, stop execution..
+# -
+if mkdir "$LOCK_DIR" 2> /dev/null ; then
+
+   # - Remove lockdir when the script finishes, or when it receives a signal
    # -
    trap clean_up SIGHUP SIGINT SIGTERM
 
+else
+
+   msg="A previos instance of script \"`basename $0`\" seems already be running."
+
+   echo ""
+   if $terminal ; then
+      echo -e "[ \033[31m\033[1mFatal\033[m ]: $msg"
+      echo ""
+      echo -e "           \033[31m\033[1mScript was interupted\033[m!"
+   else
+      echo "   [ Fatal ]: $msg"
+      echo ""
+      echo "              Script was interupted!"
+   fi
+   echo
+
+   exit 1
+
+fi
 
 
 # -------------