backupessential

#!/bin/sh
#########################################################
#   Script Requirements
#
#   Files:
#      vars_to_skip
#      vars_preferred
#      vars_to_include
#
#   Programs:
#      curl
#########################################################

#########################################################
# setup variables
#
# DATE          - Date
# MAC           - Mac address
# FILE          - File Name Prefix
# CUR_DIR       - Current Directory
# TRANSFER      - FTP Transfer ON/OFF (Default is OFF)
# FOLDER        - Location where backup scripts are stored
# VARFILE       - Location & Name of Temp File
# TO_ALL        - Location & Name of script File with all nvram variables
# TO_INCLUDE    - Location & Name of script File with essential nvram variables
# TO_EXCLUDE    - Location & Name of script File with dangerous nvram variables
# TO_PREFERRED  - Location & Name of script File with preferred nvram variables
#
# wget -O backupessential https://raw2.github.com/WolverineFan/dd-wrt.backupessential/master/vars_preferred
# wget -O vars_to_skip https://raw2.github.com/WolverineFan/dd-wrt.backupessential/master/vars_to_skip
# wget -O vars_to_include https://raw2.github.com/WolverineFan/dd-wrt.backupessential/master/vars_to_include
# wget -O vars_preferred https://raw2.github.com/WolverineFan/dd-wrt.backupessential/master/vars_preferred
#
#########################################################
export PATH=/opt/bin:/opt/sbin:/opt/usr/sbin:/bin:/usr/bin:/sbin:/usr/sbin:/jffs/sbin:/jffs/bin:/jffs/usr/sbin:/jffs/usr/bin:/mmc/sbin:/mmc/bin:/mmc/usr/sbin:/mmc/usr/bin

DATE=`date +%m%d%Y`
MAC=`nvram get lan_hwaddr | tr -d ":"`
FILE=${MAC}.${DATE}
NAME="$0"
[ -z "`which readlink`" ] || NAME="`readlink -f "${NAME}"`"
CUR_DIR=`dirname ${NAME}`
TRANSFER=0
if [ -d /opt/tmp ]; then
  FOLDER=/opt/var/backups
  VARFILE=/opt/tmp/all_vars
elif [ -d /mmc/jffs ]; then
  FOLDER=/mmc/jffs
  VARFILE=/mmc/jffs/all_vars
else
  FOLDER=/tmp/backups
  VARFILE=/tmp/all_vars
fi

flavours='all
essential
dangerous
preferred
minimal'

#########################################################
#FTP Login information change to your info
#########################################################

FTPS=ftp://192.168.10.210/backups
USERPASS=user:pass

#########################################################
# read command line switches
#
#   example command lines
#
#   ./backupessential -t
#
#   The above command with use the user and password and
#   server information embedded in this script.
#   (See FTP Login information above)
#
#
#   ./backupessential -d <backupdir> -t -u user:pass -f ftp://192.168.1.100/backups
#
#   The above command with use the user and password and
#   server information from the command line
#
#########################################################

while getopts tu:f:d: name
do
  case $name in
  t)   TRANSFER=1;;
  u)   USERPASS="$OPTARG";;
  f)   FTPS="$OPTARG";;
  d)   BACKUPDIR="$OPTARG";;
  ?)   printf "Usage: %s: [-t] [-u username:password] [-f ftpserver]\n" $0
       exit 2;;
  esac
done
shift $(($OPTIND - 1))

if [ "${BACKUPDIR}" != "" ]; then
  if [ ! -d "${BACKUPDIR}" ]; then
    echo "ERROR: ${BACKUPDIR} does not exist"
    exit 1
  fi
  FOLDER="${BACKUPDIR}"
  VARFILE="${BACKUPDIR}"/all_vars
else
  mkdir -p $FOLDER
  if [ ! -d $FOLDER ]; then
    echo "ERROR: Unable to write to $FOLDER"
    exit 1
  fi
fi
TO_ALL="${FOLDER}/${MAC}.${DATE}.all.sh"
TO_INCLUDE="${FOLDER}/${MAC}.${DATE}.essential.sh"
TO_EXCLUDE="${FOLDER}/${MAC}.${DATE}.dangerous.sh"
TO_PREFERRED="${FOLDER}/${MAC}.${DATE}.preferred.sh"
TO_MINIMAL="${FOLDER}/${MAC}.${DATE}.minimal.sh"
CR=`printf "\r"`

if [ ! -f "${CUR_DIR}/vars_to_skip" ] ; then
 echo "${CUR_DIR}/vars_to_skip is missing"
 exit 1
fi
if [ ! -f "${CUR_DIR}/vars_to_include" ] ; then
 echo "${CUR_DIR}/vars_to_include is missing"
 exit 1
fi
if [ ! -f "${CUR_DIR}/vars_preferred" ] ; then
 echo "${CUR_DIR}/vars_preferred is missing"
 exit 1
fi
if [ ! -f "${CUR_DIR}/vars_minimal" ] ; then
 echo '^cron
^wan_wins
^wan_up
^wl_ssid
^wl_net_mode
^wl_channel
^wl_nm
^wl_net_mode
^wl_nband
^wl_mrate
^wl0_wds1_
^wl0_wds
^wl0_ssid
^wl0_wchannel
^wl0_ssid
^wl0_phy
^wl0_net_mode
^wl0_nctrlsb
^wl0_nbw
^wl0_nband
^wl0_nm
^wl0_nreqd
^wk_mode
^wan_proto
^wan_hostname
^wan_dns
^wan_domain
^usb_
^qos
^wshaper_uplink
^wshaper_downlink
^wshaper_enable
^wshaper_downlink
^wshaper_dev
^svqos_svcs
^svqos_macs
^static_lease
^sshd_enable
^sshd_wanport
^sshd_authorized_keys
^snmpd_
^syslogd_enable
^remote_mgt_ssh
^remote_management
^dns_dnsmasq
^dnsmasq_
^dmz_
^enable_jffs2
^log_
^local_dns
^lan_ipaddr
^lan_domain
^rc_
^http_wanport
^http_username
^http_passwd
^http_lanport
^https_enable
^http_enable
^fullswitch
^forwardspec_entries
^forward_port$
^forward_spec
^forward_entries
^forward_cur
^ddns_enable
^ddns_username
^ddns_hostname
^ddns_passwd
^dhcp_
^block_wan
^cron' > "${CUR_DIR}/vars_minimal"
fi

grep -q "${CR}" "${CUR_DIR}/vars_to_skip"    && sed -i -e 's/\r//g' "${CUR_DIR}/vars_to_skip"
grep -q "${CR}" "${CUR_DIR}/vars_to_include" && sed -i -e 's/\r//g' "${CUR_DIR}/vars_to_include"
grep -q "${CR}" "${CUR_DIR}/vars_preferred"  && sed -i -e 's/\r//g' "${CUR_DIR}/vars_preferred"
grep -q "${CR}" "${CUR_DIR}/vars_minimal"  && sed -i -e 's/\r//g' "${CUR_DIR}/vars_minimal"

grep -q "^ *$" "${CUR_DIR}/vars_minimal"     && sed -i -e '/^ *$/d' "${CUR_DIR}/vars_minimal"
grep -q "^ *$" "${CUR_DIR}/vars_preferred"   && sed -i -e '/^ *$/d' "${CUR_DIR}/vars_preferred"
grep -q "^ *$" "${CUR_DIR}/vars_to_include"  && sed -i -e '/^ *$/d' "${CUR_DIR}/vars_to_include"
grep -q "^ *$" "${CUR_DIR}/vars_to_skip"     && sed -i -e '/^ *$/d' "${CUR_DIR}/vars_to_skip"

#########################################################
# Create NVRAM variale list and write to /opt/tmp/all_vars
#########################################################

nvram show 2>/dev/null | egrep '^[A-Za-z][A-Za-z0-9_\.\-]*=' | awk -F= '{print $1}' | sort -ruo "${VARFILE}"

#########################################################
# Write header to restore scripts
#########################################################

echo -e "#!/bin/sh\n#\necho \"Write variables\"\n" | tee -i "${TO_EXCLUDE}" | tee -i "${TO_PREFERRED}" | tee -i  "${TO_ALL}" | tee -i "${TO_MINIMAL}" > "${TO_INCLUDE}"

#########################################################
# Scan NVRAM variable list and send variable to proper
# restore script
#########################################################

while read var ; do
  pref=0
  minim=0
  if echo "${var}" | grep -q -f "${CUR_DIR}/vars_to_skip" ; then
    bfile="$TO_EXCLUDE"
  else
    bfile="$TO_INCLUDE"
    pref=`echo "${var}"  | grep -cf "${CUR_DIR}/vars_preferred"`
    minim=`echo "${var}" | grep -cf "${CUR_DIR}/vars_minimal"`
  fi

  # get the data out of the variable
  data="`nvram get ${var}`"
  # write the var to the file and use \ for special chars: (\$`")
  echo -en "nvram set ${var}=\"" | tee -ia ${TO_ALL} >> ${bfile}
  echo -n "${data}" |  sed -e 's/[$`"\]/\\&/g' | tee -ia  ${TO_ALL} >> ${bfile}
  echo -e "\"" | tee -ia  ${TO_ALL} >> ${bfile}
  if [ ${pref} -ne 0 ]; then
    echo -en "nvram set ${var}=\"" >> ${TO_PREFERRED}
    echo -n "${data}" |  sed -e 's/[$`"\]/\\&/g' >> ${TO_PREFERRED}
    echo -e "\"" >> ${TO_PREFERRED}
  fi
  if [ ${minim} -ne 0 ]; then
    echo -en "nvram set ${var}=\"" >> ${TO_MINIMAL}
    echo -n "${data}" |  sed -e 's/[$`"\]/\\&/g' >> ${TO_MINIMAL}
    echo -e "\"" >> ${TO_MINIMAL}
  fi
done <"${VARFILE}"

#########################################################
# Cleanup remove /opt/tmp/all_vars
# uncomment to remove file
#########################################################

# rm ${VARFILE}

#########################################################
# Write footer to restore script
#########################################################

echo -e "\n# Commit variables\necho \"Save variables to nvram\"\nnvram commit"  | tee -ia  "${TO_ALL}" | tee -ia  "${TO_PREFERRED}" | tee -ia  "${TO_EXCLUDE}" | tee -ia  "${TO_MINIMAL}" >> "${TO_INCLUDE}"

#########################################################
# Change permissions on restore scripts to make them
# executable
#########################################################

chmod +x "${TO_INCLUDE}"
chmod +x "${TO_PREFERRED}"
chmod +x "${TO_EXCLUDE}"
chmod +x "${TO_ALL}"
chmod +x "${TO_MINIMAL}"

# Remove the previous backup if it's (almost) the same
if cd "${FOLDER}" ; then
  for flavour in ${flavours} ; do

    echo "Checking ${MAC}.*.${flavour}.sh"

    LAST3=`ls --color=never -1rt ${MAC}.*.${flavour}.sh | tail -n3`
    PREVIOUS=`echo "${LAST3}" | tail -n+2 | head -n1`
    CURRENT=`echo  "${LAST3}" | tail -n1`

    if [ ! -z "${PREVIOUS}" ] && [ ! "${PREVIOUS}" = "${CURRENT}" ]; then

      grep -vE 'nvram set (forward_|traff|dnsmasq_lease_|http_client_)' ${PREVIOUS} >/tmp/chk1
      grep -vE 'nvram set (forward_|traff|dnsmasq_lease_|http_client_)' ${CURRENT}  >/tmp/chk2
      echo "Comparing ${PREVIOUS} with ${CURRENT}"

      if [ -z "`diff /tmp/chk1 /tmp/chk2`" ] ; then
        echo "Removing ${PREVIOUS} because it's the same as ${CURRENT}"
        rm -f ${PREVIOUS}
      fi

    fi
  done
  rm -f /tmp/chk1
  rm -f /tmp/chk2
fi

[ -h /opt/restore ] && rm /opt/restore
ln -s ${TO_MINIMAL} /opt/restore

#########################################################
# Compress restore scripts and send them to ftp server
#########################################################

if [ "${TRANSFER}" -ne 0 ] ; then
  tar cpf - -C / "${TO_INCLUDE}" 2>/dev/null | gzip -c |  /opt/bin/curl -s -u ${USERPASS} "${FTPS}/${FILE}.essential.sh.tgz" -T -
  tar cpf - -C / "${TO_MINIMAL}" 2>/dev/null | gzip -c |  /opt/bin/curl -s -u ${USERPASS} "${FTPS}/${FILE}.minimal.sh.tgz" -T -
  tar cpf - -C / "${TO_PREFERRED}" 2>/dev/null | gzip -c |  /opt/bin/curl -s -u ${USERPASS} "${FTPS}/${FILE}.preferred.sh.tgz" -T -
  tar cpf - -C / "${TO_EXCLUDE}" 2>/dev/null | gzip -c |  /opt/bin/curl -s -u ${USERPASS} "${FTPS}/${FILE}.dangerous.sh.tgz" -T -
  tar cpf - -C / "${TO_ALL}" 2>/dev/null | gzip -c |  /opt/bin/curl -s -u ${USERPASS} "${FTPS}/${FILE}.all.sh.tgz" -T -
fi