Monatliche DynDNS-Anmeldung per Script

#!/bin/bash
#
# dyndns web-login. version: 1.21
#
# credits: mxer (www.digital-eliteboard.com), jensebub (IPC.pebkac.at), feissmaik (IPC.pebkac.at)
#
# DynDNS Benutzername
USERNAME="login"

# DynDNS Passwort
PASSWORD="pass"

# Logfile. wenn nicht gewuenscht leer lassen ($0 bewirkt das der dateiname des scripts genutzt wird)
LOGFILE="/tmp/$(basename $0).log"

# Maximale Logfile Grösse in Bytes? (leer lassen falls unbegrenzt) (512000 bytes = 500 kilobytes = 0.48 megabytes)
MAXLOGSIZE="512000"

# falls MAXLOGSIZE genutzt wird: Logfile rotieren(1) oder löschen(0)?
LOGROTATE=0

# EMail verschicken? 0 = Nein, 1 = Ja (Vorraussetzung: apt-get install sendEmail)
SENDMAIL="1"

# EMail nur bei Problemen verschicken? 0 = Nein, 1 = Ja
BUGMAIL="0"

# EMail Absender
SMTPFROM="`hostname`@fqdn.net"

# EMail Empfänger
SMTPTO='an@e-mail.de'

# EMail Server Adresse  (falls port vom std. 25 abweicht, inform von HOST:PORT angeben)
SMTPSERVER='mail.anbieter.de'

# EMail Benutzername
SMTPUSER='user'

# EMail Passwort
SMTPPASS='pass'

# TLS verwenden? 0 = Nein, 1 = Ja
SMTPTLS='0'

# CONFIG - END


#- variables
COOKIE=/tmp/ddnsweblogin_cookie
OUTPUT=/tmp/ddnsweblogin_output
MULTIFORM=/tmp/multiform
TIMESTAMP=$(date +"%d.%m.%Y %H:%M:%S")
UA='Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6'
aDYN="https://account.dyn.com/"
SUBJECT1="Dyndns Login successful"
MESSAGE1="Dyndns Login wurde vom `hostname -f` erfolgreich durchgeführt!"
SUBJECT2="Dyndns Login failed"
MESSAGE2="ACHTUNG! Dyndns Login über `hostname -f` ist fehlgeschlagen!"


#- functions

# write and check log
_LOG() {
    if [ -n "$LOGFILE" ]; then
        #check size of logfile
        if [ -n "$MAXLOGSIZE" ] && [ -f "$LOGFILE" ] && [ "$(stat --printf="%s" $LOGFILE)" -gt "$MAXLOGSIZE" ]; then
            if [ "$LOGROTATE" = 1 ]; then
                echo "rotating log $LOGFILE"
                mv -f $LOGFILE ${LOGFILE}.1 >/dev/null 2>&1
            else
                echo "resetting log $LOGFILE"
                rm -f $LOGFILE >/dev/null 2>&1
            fi
            touch $LOGFILE
        fi
        echo "[$TIMESTAMP]  $1" >> $LOGFILE
    fi
}

#E-Mail senden
mailsend() {
    if [ -n "$SMTPTLS" ]; then
        [ $SMTPTLS = 1 ] && OPT="-o tls=yes" || OPT="-o tls=no"
    else
        OPT=""
    fi
    echo "Sende E-Mail..."
    sendEmail -f $SMTPFROM -t $SMTPTO -u $1 -m $2 $OPT -s $SMTPSERVER -xu $SMTPUSER -xp $SMTPPASS
}

# Simple URL encoding
proc_url_encode() {
    out=${1//%/%25}; out=${out//\{/%7B}; out=${out//\}/%7D}; out=${out//|/%7C};
    out=${out//\\/%5C}; out=${out//^/%5E}; out=${out//~/%7E}; out=${out//[/%5B};
    out=${out//]/%5D}; out=${out//\`/%60}; out=${out//#/%23}; out=${out//>/%3E};
    out=${out//\$/%24}; out=${out//&/%26}; out=${out//+/%2B}; out=${out//,/%2C};
    out=${out//\//%2F}; out=${out//:/%3A}; out=${out//;/%3B}; out=${out//=/%3B};
    out=${out//\?/%3F}; out=${out// /%20}; out=${out//</%3C};
    out=${out//\!/%21}; out=${out//\"/%22}; out=${out//\@/%40}; out=${out//\'/%27};
    out=${out//\(/%28}; out=${out//\)/%29}; out=${out//\*/%2A}; out=${out//\-/%2D};
    out=${out//\_/%5F}; out=${out//\./%2E}; out=${out//\€/%80};
    echo $out
}

#- main code

# encode username / password
USER=$(proc_url_encode "$USERNAME")
PASS=$(proc_url_encode "$PASSWORD")
if [ "$?" -gt 0 ]; then
    USER=$USERNAME
    PASS=$PASSWORD
fi

wget -q -O $MULTIFORM -U "$UA" --save-cookies $COOKIE $aDYN
MULTIFORMo=$(grep -m1 multiform $MULTIFORM | tr '=' '\n' | tail -1 | cut -d "'" -f 2)
wget -q -O $OUTPUT -U "$UA" --load-cookies $COOKIE --save-cookies $COOKIE --post-data "username=$USER&password=$PASS&iov_id&multiform=$MULTIFORMo" $aDYN

if grep -E "Welcome.*$USERNAME" $OUTPUT >/dev/null 2>&1 || "Hi.*$USERNAME" $OUTPUT >/dev/null 2>&1
then
    echo "$SUBJECT1"
    _LOG "$SUBJECT1"
    [ $SENDMAIL = 1 ] && [ $BUGMAIL = 0 ] && mailsend "$SUBJECT1" "$MESSAGE1"
else
    echo "$SUBJECT2"
    _LOG "$SUBJECT2"
    [ $SENDMAIL = 1 ] && mailsend "$SUBJECT2" "$MESSAGE2"
fi

rm -f $COOKIE $OUTPUT $MULTIFORM

exit 0
# EOF

#!/bin/sh

#!/bin/bash

LOGFILE="/var/log/$(basename $0).log"

apt-get remove --purge curl