173 lines
4.3 KiB
Bash
173 lines
4.3 KiB
Bash
#!/bin/sh
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#
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# update CloudFlare DNS records with current (dynamic) IP address
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# Script by Asif Bacchus <asif@bacchus.cloud>
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# Last modified: May 7, 2021
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#
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### text formatting presets using tput
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if command -v tput >/dev/null; then
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bold=$(tput bold)
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cyan=$(tput setaf 6)
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err=$(tput bold)$(tput setaf 1)
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magenta=$(tput setaf 5)
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norm=$(tput sgr0)
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ok=$(tput setaf 2)
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warn=$(tput bold)$(tput setaf 3)
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yellow=$(tput setaf 3)
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width=$(tput cols)
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else
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bold=""
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cyan=""
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err=""
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magenta=""
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norm=""
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ok=""
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warn=""
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yellow=""
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width=80
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fi
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### functions
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badParam() {
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if [ "$1" = "null" ]; then
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printf "\n%sERROR: '%s' cannot have a NULL (empty) value.\n" "$err" "$2"
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printf "%sPlease use '--help' for assistance.%s\n\n" "$cyan" "$norm"
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exit 1
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elif [ "$1" = "dne" ]; then
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printf "\n%sERROR: '%s %s'\n" "$err" "$2" "$3"
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printf "file or directory does not exist or is empty.%s\n\n" "$norm"
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exit 1
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elif [ "$1" = "errMsg" ]; then
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printf "\n%sERROR: %s%s\n\n" "$err" "$2" "$norm"
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exit 1
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fi
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}
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stamp() {
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(date +%F" "%T)
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}
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scriptHelp() {
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printf "\nEventually an in-script help will be here...\n\n"
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exit 0
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}
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quit() {
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if [ -z "$1" ]; then
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# exit gracefully
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printf "\n%s%s -- %s completed --%s\n\n" "$ok" "$(stamp)" "$scriptName" "$norm" >>"$logFile"
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exit 0
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fi
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}
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### default variable values
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scriptPath="$(CDPATH='' \cd -- "$(dirname -- "$0")" && pwd -P)"
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scriptName="$(basename "$0")"
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logFile="$scriptPath/${scriptName%.*}.log"
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accountFile="$scriptPath/cloudflare.credentials"
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colourizeLogFile=1
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dnsRecords=""
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dnsSeparator=","
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ipAddress="$(hostname -i)"
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ip4=1
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ip6=0
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errCount=0
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warnCount=0
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### process startup parameters
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if [ -z "$1" ]; then
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scriptHelp
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fi
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while [ $# -gt 0 ]; do
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case "$1" in
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-h | -\? | --help)
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# display help
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scriptHelp
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;;
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-l | --log)
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# set log file location
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if [ -n "$2" ]; then
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logFile="${2%/}"
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shift
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else
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badParam null "$@"
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fi
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;;
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--nc | --no-color | --no-colour)
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# do not colourize log file
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colourizeLogFile=0
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;;
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-c | --cred* | -f)
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# path to CloudFlare credentials file
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if [ -n "$2" ]; then
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if [ -f "$2" ] && [ -s "$2" ]; then
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accountFile="${2%/}"
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shift
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else
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badParam dne "$@"
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fi
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else
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badParam null "$@"
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fi
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;;
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-r | --record | --records)
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# DNS records to update
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if [ -n "$2" ]; then
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dnsRecords=$(printf "%s" "$2" | sed -e 's/ //g')
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shift
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else
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badParam null "$@"
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fi
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;;
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-i | --ip | --ip-address | -a | --address)
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# IP address to use (not parsed for correctness)
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if [ -n "$2" ]; then
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ipAddress="$2"
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shift
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else
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badParam null "$@"
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fi
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;;
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-4 | --ip4 | --ipv4)
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# operate in IP4 mode (default)
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ip4=1
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;;
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-6 | --ip6 | --ipv6)
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# operate in IP6 mode
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ip6=1
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;;
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*)
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printf "\n%sUnknown option: %s\n" "$err" "$1"
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printf "%sUse '--help' for valid options.%s\n\n" "$cyan" "$norm"
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exit 1
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;;
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esac
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shift
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done
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### pre-flight checks
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[ -z "$dnsRecords" ] && badParam errMsg "You must specify at least one DNS record to update. Exiting."
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[ "$ip4" -eq 1 ] && [ "$ip6" -eq 1 ] && badParam errMsg "Cannot operate in IP4 and IP6 modes simultaneously. Exiting."
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printf "\nscript: %s\n" "$scriptPath/$scriptName"
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printf "accountFile: %s\n" "$accountFile"
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printf "colourize: %s\n" "$colourizeLogFile"
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if [ "$ip4" = 1 ]; then
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printf "mode: IP4\n"
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elif [ "$ip6" = 1 ]; then
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printf "mode: IP6\n"
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fi
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printf "ip address: %s\n" "$ipAddress"
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# iterate DNS records to update
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dnsRecordsToUpdate="$dnsRecords$dnsSeparator"
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while [ "$dnsRecordsToUpdate" != "${dnsRecordsToUpdate#*${dnsSeparator}}" ] && { [ -n "${dnsRecordsToUpdate%%${dnsSeparator}*}" ] || [ -n "${dnsRecordsToUpdate#*${dnsSeparator}}" ]; }; do
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record="${dnsRecordsToUpdate%%${dnsSeparator}*}"
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dnsRecordsToUpdate="${dnsRecordsToUpdate#*${dnsSeparator}}"
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printf "update record: %s\n" "$record"
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done
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exit 0
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