filewatcher

filewatcher.sh

@@ -0,0 +1,38 @@
+#!/bin/sh
+#
+# Monitor file $1 for changes
+# Send an alert emai to $2 if file $1 changes
+# usage: filewatcher /var/log/messages your.name@domain.com
+#
+
+if [ -z "$2" ]; then
+    echo "Usage: filewatcher /var/log/messages your.name@domain.com"
+    exit 1
+fi
+
+#if a inotifywait for this file is already running
+if [ $(ps aux | grep inotifywait | grep -c "$1" ) -gt '0' ]; then
+        echo "A process monitoring the file $1 is already running: $(ps aux | grep inotifywait | grep "$1" )";
+        exit 1;
+fi
+
+#if inotifywait exists
+type -P inotifywait &>/dev/null || { echo "Error: This script requires inotifywait(http://wiki.github.com/rvoicilas/inotify-tools/) .... apt-get install inotify-tools ... " >&2; exit 1; }
+
+#if the file exists
+# if [ -f $1 ]; then
+
+echo "Monitoring file $1 for changes - sending alerts to $2"
+
+while inotifywait -e modify -e attrib -e move -e delete $1 -o /opt/filewatcher/audit.log; do
+        sleep 1
+
+        # changes="$(tail -n5 $1)"
+
+        changes="$(cat /opt/filewatcher/audit.log)"
+                echo "The following change occurred in the file $1 : $changes" | mail -s "Change in $1" $2
+                rm /opt/filewatcher/audit.log
+                touch /opt/filewatcher/audit.log
+        done
+else
+        echo "Error: File $1 not found"