MRTG Reconfigure script
=======================

Public domain    
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### Version 2.0
    
    #!/bin/bash
    PATH="/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/usr/bin:/bin"
    
    ##### localhost #####
    CFG="/usr/local/mrtg-2/etc/mrtg.cfg"
    WRK="/var/www/htdocs/mrtg"
    SNMP="public@127.0.0.1"

    mkdir -p "${WRK}"
    mkdir -p $(dirname "${CFG}")

    /usr/local/mrtg-2/bin/cfgmaker  \
      --zero-speed=100000000 \
      --if-filter="\$default && \$if_type!=23" \
      --ifref=name --ifdesc=name    \
      --global "Options[_]: bits"   \
      --global "kilo[_]: 1024"      \
      --global "MaxBytes[_]: 125000" \
      --global "WithPeak[_]: ymw" \
      --global "WorkDir: ${WRK}" \
      --output=${CFG}   \
      ${SNMP}

    /usr/local/mrtg-2/bin/indexmaker ${CFG} > ${WRK}/index.html
    /bin/sed -i -e 's,</td><td>,,' ${WRK}/index.html
    /usr/local/mrtg-2/bin/mrtg ${CFG}
    
    
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### Version 1.0
    
    #!/bin/bash
    # MRTG re-configuration and re-run script
    # By : Pejman Moghadam
    # crontab usage : */5 * * * * /path/to/mrtg-reconfigure > /dev/null 2>&1
    
    # Configuration
    MAXBPS="4000000"
    COMMUNITY="public"
    WORKDIR="/var/www/htdocs/mrtg"
    MRTG="/usr/local/mrtg-2/bin/mrtg"
    CFGDIR="/usr/local/mrtg-2/etc/"
    CFGMAKER="/usr/local/mrtg-2/bin/cfgmaker"
    INDEXMAKER="/usr/local/mrtg-2/bin/indexmaker"
    
    # Create directories if not exist
    /bin/mkdir -p ${WORKDIR}
    /bin/mkdir -p ${CFGDIR}
    
    # Create config file
    /bin/echo "WorkDir: ${WORKDIR}" > ${CFGDIR}/mrtg.cfg
    /bin/echo "Options[_]: bits" >> ${CFGDIR}/mrtg.cfg
    ${CFGMAKER} ${COMMUNITY}@127.0.0.1 | /bin/egrep -v '^#|^ *$' >> ${CFGDIR}/mrtg.cfg
    
    # Change MaxBytes
    let "MAX=${MAXBPS}/8"
    for OLDMAX in $(/bin/grep "MaxBytes" ${CFGDIR}/mrtg.cfg|/bin/awk '{print$2}'); do
      /bin/sed -i -e "s,${OLDMAX},${MAX}," ${CFGDIR}/mrtg.cfg
    done
    
    # Change filenames in config file from ip_num to ip_ifname
    # Gather ethernet interfaces list
    IFLST=$(/sbin/ifconfig | /bin/grep "Link encap:Ethernet" | /bin/awk '{print $1}')
    # For each interface
    for INTF in ${IFLST}; do
      # Find ip address of interface
      IP=$(/sbin/ifconfig ${INTF} | /bin/grep "inet addr:" | /bin/sed -e 's,.*inet addr:,,' | /bin/awk '{print $1}')
      # Find old filename in config file
      OLDFILE=$(/bin/grep "\"${IP}\"" ${CFGDIR}/mrtg.cfg | /bin/sed -e 's,.*\[,,' -e 's,\].*,,')
      # Separate first part of old filename
      START=$(/bin/echo ${OLDFILE} | /bin/sed -e 's,_.*,,')
      # Separate last part of old filename
      END=$(/bin/echo ${OLDFILE} | /bin/sed -e 's,.*_,,')
      # Make new filename
      NEWFILE="${START}_${INTF}"
      # Remove alias interfaces from NEWFILE name
      NEWFILE=$(/bin/echo ${NEWFILE} | /bin/sed -e 's,:.*,,')
    
      # Debug info
      #echo INTF=${INTF}
      #echo IP=${IP}
      #echo OLDFILE=${OLDFILE}
      #echo START=${START}
      #echo END=${END}
      #echo NEWFILE=${NEWFILE}
      #echo
    
      # Change old filename to new
      if [ "${OLDFILE}" != "" ]; then
        /bin/sed -i -e "s,${OLDFILE},${NEWFILE}," ${CFGDIR}/mrtg.cfg
        /bin/sed -i -e "s,Traffic Analysis for ${END} --,Traffic Analysis for ${INTF} --," ${CFGDIR}/mrtg.cfg
      fi
    done
    
    # Create index file
    ${INDEXMAKER} ${CFGDIR}/mrtg.cfg > ${WORKDIR}/index.html
    
    # Change index file to display everything in a column
    /bin/sed -i -e 's,</td><td><DIV><B>,<DIV><B>,' ${WORKDIR}/index.html
    
    # Lunch
    ${MRTG} ${CFGDIR}/mrtg.cfg > /dev/null 2>&1

 
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_BY: Pejman Moghadam_  
_TAG: mrtg, bash, bash-script_  
_DATE: 2009-05-18 14:18:44_