add hpUpdateNotify (checks for changes in websites)

hpUpdateNotify

@@ -0,0 +1,51 @@
+#!/bin/bash
+
+#####################################################
+## hpUpdateNotify ###################################
+#####################################################
+# Checks for changed websites and notifies via mail #
+#####################################################
+
+# where do you want to keep your files?
+cwd="~/hpUpdateNotify/"
+
+# add any homepage (its name) you want to be notified about
+files=( "foobar" )
+
+# and just put the address in the array below at the corresponding index
+addresses=( "http://www.foobar.com" )
+
+lastIndex=`expr ${#addresses[@]} - 1` # do not change
+suffix=".html"
+
+# who should be notified? eg. "foo@bar.de spam@eggs.com"
+mailto="foo@bar.de"
+
+mailContent=""
+
+for i in $(seq 0 $lastIndex); do
+    date=`date`
+    file=${files[$i]}
+    address=${addresses[$i]}
+    checksum="0"
+    if [ -f $cwd$file$suffix ]; then
+	checksum=`md5sum $cwd$file$suffix` &&
+	    rm $cwd$file$suffix
+    fi
+    wget -o /dev/null --output-document=$cwd$file$suffix $address &&
+	newchecksum=`md5sum $cwd$file$suffix` &&
+	if [ "$newchecksum" = "$checksum" ]; then
+	    echo $date $file  "nothing updated"
+	elif [ "$checksum" = "0" ]; then
+	    echo $date $file$suffix " created"
+	else
+	    echo $date $file "has changed"
+	    mailContent=$mailContent$date" "$file"( "$address" ) has changed \n\n"
+	fi
+done
+
+if [ "$mailContent" != "" ]; then
+    for recipient in $mailto; do
+	echo -e $mailContent|mutt -s "[HP Updates]" $recipient && echo "mail to "$recipient" successfully sent"
+    done
+fi