router.db controls for rancid: Remove existing line or add new, using snmp to fetch hostname if not presented by user

updaterancidCPE.sh

#!/usr/bin/env bash

##
## updaterancid.sh v.2012-12-06
##
## jd@nianet.dk
##

if [[ $(id -un) != "rancid" ]]; then
  echo "Must be rancid user to run this script."
  exit 1
fi

date=$(date +%Y-%m-%d-kl-%H-%m)
ip=$1

function aboutMe {
  echo -e "Rancid Updater v. 2012-12-06"
  echo -e "\n\tOpdater linje i Rancid baseret paa \033[1;31mIP-adresse\033[1;0m"
  echo -e "\n\tEksempel:\n\t\t`basename $0` \033[1;31mIP-adresse\033[1;0m\n"
  echo -e "\n\tCPEens \033[1;31mhostname\033[0m hentes efter behov automatisk vha. snmp"
  echo -e "\n\tHvis \033[1;31mhostname\033[0m skal forceres eller CPE er nede skriver du"
  echo -e "\n\t\t`basename $0` \033[1;31mIP-adresse hostname\033[0m\n\n"
  exit 0
}

function wantToDestroyLine {
  removedline=`sed -n "/^$ip:/p" /usr/local/var/rancid/rancid-cpe/router.db | sed -e "s/:cisco:up:/ /"`
  echo -e "\n\tFound \033[1;31m$removedline\033[1;0m\n"
  read -n 1 -p "        Would you like me to erase that line (y/j/n)? " yno 
  case $yno in 
    [yYjJ] )
      cp /usr/local/var/rancid/rancid-cpe/router.db /usr/local/var/rancid/rancid-cpe/router.db.$date

      sed -e "/^$ip:/d" /usr/local/var/rancid/rancid-cpe/router.db.$date > /usr/local/var/rancid/rancid-cpe/router.db

      echo -e "\n\n\t\033[1;31m$removedline\033[1;0m sent to the farm.\n"
      exit 0
      ;;

    [nN] )
      echo -e "\n\tFine! Have it your way!\n\tDoing nothing.\n"
      exit 0
      ;;

    *)
      echo -e "\n\tWhatchutalkinboutwillis?\n\n\tInvalid input detected.\n\n\t\033[1;31mDoing nothing.\033[1;0m\n"
      exit 1
      ;;
  esac 
}

function wantToCreateLine {
  string="$ip:cisco:up:$hostname"
  cp /usr/local/var/rancid/rancid-cpe/router.db /usr/local/var/rancid/rancid-cpe/router.db.$date

  echo $string >> /usr/local/var/rancid/rancid-cpe/router.db
  echo -e "\n\tAdded \033[1;31m$string\033[0m\n"
  exit 0
}

function checkForLine {
  if `grep -q "^$ip\:" /usr/local/var/rancid/rancid-cpe/router.db` 
    then
    wantToDestroyLine
  fi

  wantToCreateLine
}

function getHostNameViaSNMP {
  echo -e "\nTrying to fetch hostname from the CPE...\n"
  if [ ! `ping -c 1 $ip > /dev/null` ]
    then
    echo -e "\n\tUnfortunately, \033[1;31m$ip\033[0m does not seem to be responsive at the moment,"
    echo -e "\ttherefore I cannot ascertain \033[1;31mhostname\033[0m via SNMP.\n"
    echo -e "\n\tYou can still add the entry using the following syntax:"
    echo -e "\n\t\t`basename $0` \033[1;31mIP-adresse hostname\033[0m\n\n"
    exit 1
  fi

  hostname=$(snmpwalk -v 2c -c nianetcpemgmtread $ip .1.3.6.1.4.1.9.2.1.3 | awk -F\" '{ print $2 }')
}


case $# in
  0)
    aboutMe
  ;;

  1)
    getHostNameViaSNMP
    checkForLine
    ;;

  2)
    cpehostname=$2
    checkForLine
    ;;
esac

Bloody hell, måske skal jeg lave et simplere script uden $# in 1 og så lave en wrapper på ny-cm1 der evt. laver snmpwalk og så giver det videre til cm1