refactor: replace BASH script with new POSIX one

This commit is contained in:
Asif Bacchus 2021-05-08 04:00:15 -06:00
parent 124644e38e
commit 52f5ef96e8
2 changed files with 437 additions and 796 deletions

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@ -1,457 +0,0 @@
#!/bin/sh
#
# update CloudFlare DNS records with current (dynamic) IP address
# Script by Asif Bacchus <asif@bacchus.cloud>
# Last modified: May 7, 2021
#
### text formatting presets using tput
if command -v tput >/dev/null; then
bold=$(tput bold)
cyan=$(tput setaf 6)
err=$(tput bold)$(tput setaf 1)
magenta=$(tput setaf 5)
norm=$(tput sgr0)
ok=$(tput setaf 2)
warn=$(tput bold)$(tput setaf 3)
yellow=$(tput setaf 3)
width=$(tput cols)
else
bold=""
cyan=""
err=""
magenta=""
norm=""
ok=""
warn=""
yellow=""
width=80
fi
### functions
badParam() {
if [ "$1" = "null" ]; then
printf "\n%sERROR: '%s' cannot have a NULL (empty) value.\n" "$err" "$2"
printf "%sPlease use '--help' for assistance.%s\n\n" "$cyan" "$norm"
exit 1
elif [ "$1" = "dne" ]; then
printf "\n%sERROR: '%s %s'\n" "$err" "$2" "$3"
printf "file or directory does not exist or is empty.%s\n\n" "$norm"
exit 1
elif [ "$1" = "errMsg" ]; then
printf "\n%sERROR: %s%s\n\n" "$err" "$2" "$norm"
exit 1
fi
}
exitError() {
case "$1" in
10)
errMsg="Unable to auto-detect IP address. Try again later or supply the IP address to be used."
;;
20)
errMsg="CloudFlare authorized email address (cfEmail) is either null or undefined. Please check your CloudFlare credentials file."
;;
21)
errMsg="CloudFlare authorized API key (cfKey) is either null or undefined. Please check your CloudFlare credentials file."
;;
22)
errMsg="CloudFlare zone id (cfZoneId) is either null or undefined. Please check your CloudFlare credentials file."
;;
25)
errMsg="Unable to query CloudFlare account. Please re-check your credentials and try again later."
;;
98)
errMsg="One or more domain updates failed. Please review this log file for details."
;;
*)
printf "%s[%s] ERROR: An unspecified error occurred. Exiting.%s\n" "$err" "$(stamp)" "$norm" >>"$logFile"
exit 99
;;
esac
printf "%s[%s] ERROR: %s (code: %s)%s\n" "$err" "$(stamp)" "$errMsg" "$1" "$norm" >>"$logFile"
printf "%s[%s] -- CloudFlare DDNS update-script: execution completed with error(s) --%s\n" "$err" "$(stamp)" "$norm" >>"$logFile"
exit "$1"
}
exitOK() {
printf "%s[%s] -- CloudFlare DDNS update-script: execution complete --%s\n" "$ok" "$(stamp)" "$norm" >>"$logFile"
exit 0
}
stamp() {
(date +%F" "%T)
}
scriptHelp() {
newline
printf "Update CloudFlare DNS host A/AAAA records with current IP address.\n"
printf "%sUsage: %s --records host.domain.tld[,host2.domain.tld,...] [parameters]%s\n\n" "$bold" "$scriptName" "$norm"
textblock "The only required parameter is '--records' which is a comma-delimited list of hostnames to update. However, there are several other options which may be useful to implement."
textblock "Paramters are listed below and followed by a description of their effect. If a default value exists, it will be listed on the following line in (parentheses)."
newline
textblock "${magenta}--- script related parameters ---${norm}"
newline
textblockSwitches "-c | --cred | --creds | --credentials | -f (deprecated, backward-compatability)"
textblock "Path to file containing your CloudFlare *token* credentials. Please refer to the repo README for more information on format, etc."
textblockDefaults "(${accountFile})"
newline
textblockSwitches "-l | --log"
textblock "Path where the log file should be written."
textblockDefaults "(${logFile})"
newline
textblockSwitches "--nc | --no-color | --no-colour"
textblock "Switch value. Disables ANSI colours in the log. Useful if you review the logs using a reader that does not parse ANSI colour codes."
textblockDefaults "(disabled: print logs in colour)"
newline
textblockSwitches "--log-console"
textblock "Switch value. Output log to console (stdout) instead of a log file. Can be combined with --nc if desired."
textblockDefaults "(disabled: output to log file)"
newline
textblockSwitches "--no-log"
textblock "Switch value. Do not create a log (i.e. no console, no file). You will not have *any* output from the script if you choose this option, so you will not know if updates succeeded or failed."
textblockDefaults "(disabled: output to log file)"
newline
textblockSwitches "-h | --help | -?"
textblock "Display this help screen."
newline
textblockSwitches "--examples"
textblock "Show some usage examples."
newline
textblock "${magenta}--- DNS related parameters ---${norm}"
newline
textblockSwitches "-r | --record | --records"
textblock "Comma-delimited list of hostnames for which IP addresses should be updated in CloudFlare DNS. This parameter is REQUIRED. Note that this script will only *update* records, it will not create new ones. If you supply hostnames that are not already defined in DNS, the script will log a warning and will skip those hostnames."
newline
textblockSwitches "-i | --ip | --ip-address | -a | --address"
textblock "New IP address for DNS host records. If you omit this, the script will attempt to auto-detect your public IP address and use that."
newline
textblockSwitches "-4 | --ip4 | --ipv4"
textblock "Switch value. Update Host 'A' records (IP4) only. Note that this script can only update either A *or* AAAA records. If you need to update both, you'll have to run the script once in IP4 mode and again in IP6 mode. If you specify both this switch and the IP6 switch, the last one specified will take effect."
textblockDefaults "(enabled: update A records)"
newline
textblockSwitches "-6 | --ip6 | --ipv6"
textblock "Switch value. Update Host 'AAAA' records (IP6) only. Note that this script can only update either A *or* AAAA records. If you need to update both, you'll have to run the script once in IP4 mode and again in IP6 mode. If you specify both this switch and the IP4 switch, the last one specified will take effect."
textblockDefaults "(disabled: update A records)"
newline
textblock "Please refer to the repo README for more detailed information regarding this script and how to automate and monitor it."
newline
exit 0
}
scriptExamples() {
newline
printf "Update CloudFlare DNS host A/AAAA records with current IP address.\n"
printf "%sUsage: %s --records host.domain.tld[,host2.domain.tld,...] [parameters]%s\n\n" "$bold" "$scriptName" "$norm"
textblock "${magenta}--- usage examples ---${norm}"
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net"
textblock "Update CloudFlare DNS records for myserver.mydomain.net with the auto-detected public IP4 address. Credentials will be expected in the default location and the log will be written in the default location also."
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net -6"
textblock "Same as above, but update AAAA host records with the auto-detected public IP6 address."
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net,otherserver.mydomain.net -l /var/log/cfddns.log --nc"
textblock "Update DNS entries for both listed hosts using auto-detected IP4 address. Write a non-coloured log to '/var/log/cfddns.log'."
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net,otherserver.mydomain.net -l /var/log/cfddns.log --ip6 --ip fd21:7a62:2737:9c3a::a151"
textblock "Update DNS AAAA entries for listed hosts using the *specified* IP address. Write a colourful log to the location specified."
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net -c /root/cloudflare.creds -l /var/log/cfddns.log --ip 1.2.3.4"
textblock "Update DNS A entry for listed hostname with the provided IP address. Read cloudflare credentials file from specified location, save log in specified location."
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net -c /root/cloudflare.creds -l /var/log/cfddns.log -6 -i fd21:7a62:2737:9c3a::a151"
textblock "Exact same as above, but change the AAAA record. This is how you run the script once for IP4 and again for IP6."
exit 0
}
textblock() {
printf "%s\n" "$1" | fold -w "$width" -s
}
textblockDefaults() {
printf "%s%s%s\n" "$yellow" "$1" "$norm"
}
textblockSwitches() {
printf "%s%s%s\n" "$cyan" "$1" "$norm"
}
newline() {
printf "\n"
}
### default variable values
scriptPath="$(CDPATH='' \cd -- "$(dirname -- "$0")" && pwd -P)"
scriptName="$(basename "$0")"
logFile="$scriptPath/${scriptName%.*}.log"
accountFile="$scriptPath/cloudflare.credentials"
colourizeLogFile=1
dnsRecords=""
dnsSeparator=","
ipAddress=""
ip4=1
ip6=0
ip4DetectionSvc="http://ipv4.icanhazip.com"
ip6DetectionSvc="http://ipv6.icanhazip.com"
invalidDomainCount=0
failedDomainCount=0
### process startup parameters
if [ -z "$1" ]; then
scriptHelp
fi
while [ $# -gt 0 ]; do
case "$1" in
-h | -\? | --help)
# display help
scriptHelp
;;
--examples)
# display sample commands
scriptExamples
;;
-l | --log)
# set log file location
if [ -n "$2" ]; then
logFile="${2%/}"
shift
else
badParam null "$@"
fi
;;
--log-console)
# log to the console instead of a file
logFile="/dev/stdout"
;;
--no-log)
# do not log anything
logFile="/dev/null"
;;
--nc | --no-color | --no-colour)
# do not colourize log file
colourizeLogFile=0
;;
-c | --cred* | -f)
# path to CloudFlare credentials file
if [ -n "$2" ]; then
if [ -f "$2" ] && [ -s "$2" ]; then
accountFile="${2%/}"
shift
else
badParam dne "$@"
fi
else
badParam null "$@"
fi
;;
-r | --record | --records)
# DNS records to update
if [ -n "$2" ]; then
dnsRecords=$(printf "%s" "$2" | sed -e 's/ //g')
shift
else
badParam null "$@"
fi
;;
-i | --ip | --ip-address | -a | --address)
# IP address to use (not parsed for correctness)
if [ -n "$2" ]; then
ipAddress="$2"
shift
else
badParam null "$@"
fi
;;
-4 | --ip4 | --ipv4)
# operate in IP4 mode (default)
ip4=1
ip6=0
;;
-6 | --ip6 | --ipv6)
# operate in IP6 mode
ip6=1
ip4=0
;;
*)
printf "\n%sUnknown option: %s\n" "$err" "$1"
printf "%sUse '--help' for valid options.%s\n\n" "$cyan" "$norm"
exit 1
;;
esac
shift
done
### pre-flight checks
if ! command -v curl >/dev/null; then
printf "\n%sThis script requires 'curl' be installed and accessible. Exiting.%s\n\n" "$err" "$norm"
exit 2
fi
if ! command -v jq >/dev/null; then
printf "\n%sThis script requires 'jq' be installed and accessible. Exiting.%s\n\n" "$err" "$norm"
exit 2
fi
[ -z "$dnsRecords" ] && badParam errMsg "You must specify at least one DNS record to update. Exiting."
# verify credentials file exists and is not empty (default check)
if [ ! -f "$accountFile" ] || [ ! -s "$accountFile" ]; then
badParam errMsg "Cannot find CloudFlare credentials file (${accountFile}). Exiting."
fi
# turn off log file colourization if parameter is set
if [ "$colourizeLogFile" -eq 0 ]; then
bold=""
cyan=""
err=""
magenta=""
norm=""
ok=""
warn=""
yellow=""
fi
### initial log entries
{
printf "%s[%s] -- CloudFlare DDNS update-script: execution starting --%s\n" "$ok" "$(stamp)" "$norm"
printf "%sParameters:\n" "$magenta"
printf "script path: %s\n" "$scriptPath/$scriptName"
printf "credentials file: %s\n" "$accountFile"
} >>"$logFile"
if [ "$ip4" -eq 1 ]; then
printf "mode: IP4\n" >>"$logFile"
elif [ "$ip6" -eq 1 ]; then
printf "mode: IP6\n" >>"$logFile"
fi
# detect and report IP address
if [ -z "$ipAddress" ]; then
# detect public ip address
if [ "$ip4" -eq 1 ]; then
if ! ipAddress="$(curl -s $ip4DetectionSvc)"; then
printf "ddns ip address: %serror%s\n" "$err" "$norm" >>"$logFile"
exitError 10
fi
fi
if [ "$ip6" -eq 1 ]; then
if ! ipAddress="$(curl -s $ip6DetectionSvc)"; then
printf "ddns ip address: %serror%s\n" "$err" "$norm" >>"$logFile"
exitError 10
fi
fi
printf "ddns ip address (detected): %s\n" "$ipAddress" >>"$logFile"
else
printf "ddns ip address (supplied): %s\n" "$ipAddress" >>"$logFile"
fi
# iterate DNS records to update
dnsRecordsToUpdate="$dnsRecords$dnsSeparator"
while [ "$dnsRecordsToUpdate" != "${dnsRecordsToUpdate#*${dnsSeparator}}" ] && { [ -n "${dnsRecordsToUpdate%%${dnsSeparator}*}" ] || [ -n "${dnsRecordsToUpdate#*${dnsSeparator}}" ]; }; do
record="${dnsRecordsToUpdate%%${dnsSeparator}*}"
dnsRecordsToUpdate="${dnsRecordsToUpdate#*${dnsSeparator}}"
printf "updating record: %s\n" "$record" >>"$logFile"
done
printf "(end of parameter list)%s\n" "$norm" >>"$logFile"
### read CloudFlare credentials
printf "[%s] Reading CloudFlare credentials... " "$(stamp)" >>"$logFile"
case "$accountFile" in
/*)
# absolute path, use as-is
# shellcheck source=./cloudflare.credentials
. "$accountFile"
;;
*)
# relative path, rewrite
# shellcheck source=./cloudflare.credentials
. "./$accountFile"
;;
esac
if [ -z "$cfEmail" ]; then
printf "%sERROR%s\n" "$err" "$norm" >>"$logFile"
exitError 20
elif [ -z "$cfKey" ]; then
printf "%sERROR%s\n" "$err" "$norm" >>"$logFile"
exitError 21
elif [ -z "$cfZoneId" ]; then
printf "%sERROR%s\n" "$err" "$norm" >>"$logFile"
exitError 22
fi
printf "DONE%s\n" "$norm" >>"$logFile"
### check if records to be updated exist and if they need updating, update as required
dnsRecordsToUpdate="$dnsRecords$dnsSeparator"
if [ "$ip4" -eq 1 ]; then
recordType="A"
elif [ "$ip6" -eq 1 ]; then
recordType="AAAA"
fi
while [ "$dnsRecordsToUpdate" != "${dnsRecordsToUpdate#*${dnsSeparator}}" ] && { [ -n "${dnsRecordsToUpdate%%${dnsSeparator}*}" ] || [ -n "${dnsRecordsToUpdate#*${dnsSeparator}}" ]; }; do
record="${dnsRecordsToUpdate%%${dnsSeparator}*}"
dnsRecordsToUpdate="${dnsRecordsToUpdate#*${dnsSeparator}}"
printf "[%s] Processing %s... " "$(stamp)" "$record" >>"$logFile"
# check for existing record, else exit with error (this script does NOT create new records, only updates them!)
if ! cfResult="$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/${cfZoneId}/dns_records?name=${record}&type=${recordType}" \
-H "Authorization: Bearer ${cfKey}" \
-H "Content-Type: application/json")"; then
printf "%sERROR%s\n" "$err" "$norm" >>"$logFile"
exitError 25
fi
resultCount="$(printf "%s" "$cfResult" | jq '.result_info.count')"
if [ "$resultCount" = "0" ]; then
printf "%sNOT FOUND%s\n" "$warn" "$norm" >>"$logFile"
printf "%s[%s] WARNING: Cannot find existing record to update for DNS entry: %s%s\n" "$warn" "$(stamp)" "$record" "$norm" >>"$logFile"
invalidDomainCount=$((invalidDomainCount + 1))
else
objectId=$(printf "%s" "$cfResult" | jq -r '.result | .[] | .id')
currentIpAddr=$(printf "%s" "$cfResult" | jq -r '.result | .[] | .content')
printf "FOUND: IP = %s\n" "$currentIpAddr" >>"$logFile"
# check if record needs updating
if [ "$currentIpAddr" = "$ipAddress" ]; then
printf "%s[%s] IP address for %s is already up-to-date%s\n" "$ok" "$(stamp)" "$record" "$norm" >>"$logFile"
else
# update record
printf "%s[%s] Updating IP address for %s... " "$cyan" "$(stamp)" "$record" >>"$logFile"
updateJSON="$(jq -n --arg key0 content --arg value0 "${ipAddress}" '{($key0):$value0}')"
if ! cfResult="$(curl -s -X PATCH "https://api.cloudflare.com/client/v4/zones/${cfZoneId}/dns_records/${objectId}" \
-H "Authorization: Bearer ${cfKey}" \
-H "Content-Type: application/json" \
--data "${updateJSON}")"; then
printf "%sERROR%s\n" "$err" "$norm" >>"$logFile"
exitError 25
fi
updateSuccess="$(printf "%s" "$cfResult" | jq '.success')"
if [ "$updateSuccess" = "true" ]; then
printf "DONE%s\n" "$norm" >>"$logFile"
printf "%s[%s] SUCCESS: IP address for %s updated%s\n" "$ok" "$(stamp)" "$record" "$norm" >>"$logFile"
else
printf "%sFAILED%s\n" "$err" "$norm" >>"$logFile"
printf "%s[%s] ERROR: Unable to update IP address for %s%s\n" "$err" "$(stamp)" "$record" "$norm" >>"$logFile"
failedDomainCount=$((failedDomainCount + 1))
fi
fi
fi
done
# exit
if [ "$invalidDomainCount" -ne 0 ]; then
printf "%s[%s] -- WARNING: %s invalid domain(s) were supplied for updating --%s\n" "$warn" "$(stamp)" "$invalidDomainCount" "$norm" >>"$logFile"
fi
if [ "$failedDomainCount" -ne 0 ]; then
exitError 98
else
exitOK
fi
### exit return codes
# 0: normal exit, no errors
# 1: invalid or unknown parameter
# 2: cannot find or access required external program(s)
# 10: cannot auto-detect IP address
# 20: accountFile has a null or missing cfEmail variable
# 21: accountFile has a null or missing cfKey variable
# 22: accountFile has a null or missing cfZoneId variable
# 25: unable to query CloudFlare account
# 97: script completed with warnings
# 98: one or more updates failed
# 99: unspecified error occurred

736
cfddns.sh Executable file → Normal file
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@ -1,359 +1,457 @@
#!/bin/bash #!/bin/sh
#
# update CloudFlare DNS records with current (dynamic) IP address
# Script by Asif Bacchus <asif@bacchus.cloud>
# Last modified: May 7, 2021
#
### Define functions ### text formatting presets using tput
if command -v tput >/dev/null; then
function scriptHelp { bold=$(tput bold)
echo -e "\e[1;39mUsage:" cyan=$(tput setaf 6)
echo -e "\e[1;36m$(basename "${0}")" \ err=$(tput bold)$(tput setaf 1)
"\e[1;35m-f /path/to/account/details.file" magenta=$(tput setaf 5)
echo -e "\t\e[1;33m-r record.to.update [-r another.record.to.update -r ...]" norm=$(tput sgr0)
echo -e "\t\e[0;92m[optional parameters]\e[0m\n" ok=$(tput setaf 2)
echo -e "\e[1;39mNotes:\e[0m" warn=$(tput bold)$(tput setaf 3)
echo -e "-f and -r parameters are REQUIRED." yellow=$(tput setaf 3)
echo -e "Multiple A/AAAA records to update can be specified by supplying" width=$(tput cols)
echo -e "\tmultiple -r parameters (see examples below)."
echo "This script can operate only in either IP4 OR IP6 mode. See below."
echo "This script will NOT verify the format or validity of supplied IP"
echo -e "\taddresses."
echo -e "\n\e[1;39mOptional parameters\e[0m"
echo -e "-i\tUse this IP address when updating DNS records"
echo -e "\tIf NOT supplied, the script will attempt to auto-detect this"
echo -e "\tmachine's IP address (depending on -4 or -6 parameters) and"
echo -e "\tuse that address for DNS updates. The script does NOT check"
echo -e "\tthe validity of an address supplied using this parameter nor"
echo -e "\tthe protocol type (IP4 vs IP6)."
echo -e "-4\tOperate in IP4 mode and update A records (default)"
echo -e "\tThis is the default operating mode and does not need to be"
echo -e "\texplicitly specified. Ensure you have supplied a valid IP4"
echo -e "\taddress using the -i parameter or that your machine's IP4"
echo -e "\taddress can be correctly detected externally."
echo -e "-6\tOperate in IP6 mode and update AAAA records"
echo -e "\tONLY AAAA records will be updated. Ensure you have supplied"
echo -e "\ta valid IP6 address using the -i parameter or that your"
echo -e "\tmachine's IP6 address can be correctly detected externally."
echo -e "-h\tDisplay this help page"
echo -e "-x\tDisplay script examples"
echo -e "-l\tLocation for log file output"
echo -e "\tDefault: scriptname.log in same directory as this script"
echo -e "\n\e[1;39mExamples:"
echo -e "\e[0;39mRun \e[1;36m$(basename "${0}") \e[1;92m-x\e[0m\n"
echo -e "\n"
# exit with any error code used to call this help screen
quit none "$1"
}
function scriptExamples {
echo -e "\n\e[1;39m$(basename "${0}") Examples:\e[0m"
echo -e "\n\e[1;39mExample: \e[0mUse details from myCloudFlareDetails.info"
echo -e "file in /home/janedoe directory. Update server.mydomain.com A record"
echo -e "with this machine's auto-detected IP4 address."
echo -e "\t\e[1;36m$(basename "${0}")" \
"\e[1;35m-f /home/janedoe/myCloudFlareDetails.info"
echo -e "\t\e[1;33m-r server.mydomain.com\e[0m"
echo -e "\n\e[1;39mExample: \e[0mUse details from myCloudFlareDetails.info"
echo -e "file in /home/janedoe directory. Update server.mydomain.com AND"
echo -e "server2.mydomain.com A records with this machine's auto-detected IP6"
echo -e "address."
echo -e "\t\e[1;36m$(basename "${0}")" \
"\e[1;35m-f /home/janedoe/myCloudFlareDetails.info"
echo -e "\t\e[1;33m-r server.mydomain.com" \
"-r server2.mydomain.com \e[1;92m-6\e[0m"
echo -e "\n\e[1;39mExample: \e[0mUse details from myCloudFlareDetails.info"
echo -e "file in /home/janedoe directory. Update server.mydomain.com A record"
echo -e "using IP4 address 1.2.3.4."
echo -e "\t\e[1;36m$(basename "${0}")" \
"\e[1;35m-f /home/janedoe/myCloudFlareDetails.info"
echo -e "\t\e[1;33m-r server.mydomain.com \e[1;92m-i 1.2.3.4\e[0m"
echo -e "\n\e[1;39mExample: \e[0mUse details from myCloudFlareDetails.info"
echo -e "file in /home/janedoe directory. Update server3.mydomain.com AND"
echo -e "server7.mydomain.com AAAA records using IP6 address FE80::286A:FF91."
echo -e "\t\e[1;36m$(basename "${0}")" \
"\e[1;35m-f /home/janedoe/myCloudFlareDetails.info"
echo -e "\t\e[1;33m-r server.mydomain.com" \
"\e[1;33m-r server2.mydomain.com \e[1;92m-i FE80::286A:FF91\e[0m"
quit none
}
function quit {
if [ -z "$1" ]; then
# exit cleanly
echo -e "${bold}${note}${stamp} -- Script completed --${normal}" \
>> "$logFile"
exit 0
elif [ "$1" = "none" ]; then
if [ -z "$2" ]; then
# exit cleanly
exit 0
else else
# exit with error code but don't log/display it bold=""
exit "$2" cyan=""
err=""
magenta=""
norm=""
ok=""
warn=""
yellow=""
width=80
fi fi
elif [ "$1" = "199" ]; then
# list DNS entries that were not updated ### functions
for failedName in "${failedDNS[@]}"; do badParam() {
echo -e "${bold}${err}${stamp}" \ if [ "$1" = "null" ]; then
"-- [ERROR] $failedName was NOT updated --${normal}" >> "$logFile" printf "\n%sERROR: '%s' cannot have a NULL (empty) value.\n" "$err" "$2"
done printf "%sPlease use '--help' for assistance.%s\n\n" "$cyan" "$norm"
exit "$1" exit 1
else elif [ "$1" = "dne" ]; then
# notify use that error has occurred and provide exit code printf "\n%sERROR: '%s %s'\n" "$err" "$2" "$3"
echo -e "${bold}${err}${stamp}" \ printf "file or directory does not exist or is empty.%s\n\n" "$norm"
"-- [ERROR] ${errorExplain[$1]} (code: $1) --${normal}" >> "$logFile" exit 1
exit "$1" elif [ "$1" = "errMsg" ]; then
printf "\n%sERROR: %s%s\n\n" "$err" "$2" "$norm"
exit 1
fi fi
} }
### end of functions exitError() {
case "$1" in
10)
### unset environment variables used in this script and initialize arrays errMsg="Unable to auto-detect IP address. Try again later or supply the IP address to be used."
unset PARAMS
unset accountFile
unset ipAddress
errorExplain=()
dnsRecords=()
cfDetails=()
cfRecords=()
currentIP=()
recordID=()
failedDNS=()
ip4=1
ip6=0
### define script variables
# timestamp
stamp="[`date +%Y-%m-%d` `date +%H:%M:%S`]"
# formatting
normal="\e[0m"
bold="\e[1m"
ok="\e[32m"
err="\e[31m"
info="\e[96m"
lit="\e[93m"
note="\e[35m"
## define error code explainations
errorExplain[1]="Missing or invalid parameters on script invocation."
errorExplain[2]="curl is required to access CloudFlare API. Please install curl. (apt-get install curl on debian/ubuntu)."
errorExplain[101]="Location of file with CloudFlare account details was NOT provided (-f parameter missing)."
errorExplain[102]="CloudFlare account details file is empty or does not exist"
errorExplain[103]="No DNS records to update were specified (-r parameter(s) missing)."
errorExplain[104]="There are no DNS records specified that match those found in your CloudFlare account to update."
errorExplain[201]="Could not detect this machine's IP address. Please re-run this script with the -i option."
errorExplain[254]="Could not connect with CloudFlare API. Please re-run this script later."
## Logging parameters -- default set to scriptname.ext.log in same
## directory as this script
scriptPath="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
scriptName="$(basename "${0}")"
logFile="$scriptPath/${scriptName%.*}.log"
### Process script parameters
if [ -z "$1" ]; then
scriptHelp 1
fi
while getopts ':f:r:i:46hxl:' PARAMS; do
case "$PARAMS" in
f)
# path to file with CloudFlare account details
accountFile="${OPTARG}"
;; ;;
r) 20)
# DNS records to update errMsg="CloudFlare authorized email address (cfEmail) is either null or undefined. Please check your CloudFlare credentials file."
dnsRecords+=("$OPTARG")
;; ;;
i) 21)
# IP address to use -- NOT parsed for correctness errMsg="CloudFlare authorized API key (cfKey) is either null or undefined. Please check your CloudFlare credentials file."
ipAddress="$OPTARG"
;; ;;
4) 22)
# Put script in IP4 mode (default) errMsg="CloudFlare zone id (cfZoneId) is either null or undefined. Please check your CloudFlare credentials file."
ip4=1
ip6=0
;; ;;
6) 25)
# Put script in IP6 mode errMsg="Unable to query CloudFlare account. Please re-check your credentials and try again later."
ip4=0
ip6=1
;; ;;
h) 98)
# Display info on script usage errMsg="One or more domain updates failed. Please review this log file for details."
scriptHelp
;; ;;
x) *)
# Show examples of script usage printf "%s[%s] ERROR: An unspecified error occurred. Exiting.%s\n" "$err" "$(stamp)" "$norm" >>"$logFile"
scriptExamples exit 99
;;
l)
# Path to write log file
logFile="${OPTARG}"
;;
?)
scriptHelp 1
;; ;;
esac esac
printf "%s[%s] ERROR: %s (code: %s)%s\n" "$err" "$(stamp)" "$errMsg" "$1" "$norm" >>"$logFile"
printf "%s[%s] -- CloudFlare DDNS update-script: execution completed with error(s) --%s\n" "$err" "$(stamp)" "$norm" >>"$logFile"
exit "$1"
}
exitOK() {
printf "%s[%s] -- CloudFlare DDNS update-script: execution complete --%s\n" "$ok" "$(stamp)" "$norm" >>"$logFile"
exit 0
}
stamp() {
(date +%F" "%T)
}
scriptHelp() {
newline
printf "Update CloudFlare DNS host A/AAAA records with current IP address.\n"
printf "%sUsage: %s --records host.domain.tld[,host2.domain.tld,...] [parameters]%s\n\n" "$bold" "$scriptName" "$norm"
textblock "The only required parameter is '--records' which is a comma-delimited list of hostnames to update. However, there are several other options which may be useful to implement."
textblock "Paramters are listed below and followed by a description of their effect. If a default value exists, it will be listed on the following line in (parentheses)."
newline
textblock "${magenta}--- script related parameters ---${norm}"
newline
textblockSwitches "-c | --cred | --creds | --credentials | -f (deprecated, backward-compatability)"
textblock "Path to file containing your CloudFlare *token* credentials. Please refer to the repo README for more information on format, etc."
textblockDefaults "(${accountFile})"
newline
textblockSwitches "-l | --log"
textblock "Path where the log file should be written."
textblockDefaults "(${logFile})"
newline
textblockSwitches "--nc | --no-color | --no-colour"
textblock "Switch value. Disables ANSI colours in the log. Useful if you review the logs using a reader that does not parse ANSI colour codes."
textblockDefaults "(disabled: print logs in colour)"
newline
textblockSwitches "--log-console"
textblock "Switch value. Output log to console (stdout) instead of a log file. Can be combined with --nc if desired."
textblockDefaults "(disabled: output to log file)"
newline
textblockSwitches "--no-log"
textblock "Switch value. Do not create a log (i.e. no console, no file). You will not have *any* output from the script if you choose this option, so you will not know if updates succeeded or failed."
textblockDefaults "(disabled: output to log file)"
newline
textblockSwitches "-h | --help | -?"
textblock "Display this help screen."
newline
textblockSwitches "--examples"
textblock "Show some usage examples."
newline
textblock "${magenta}--- DNS related parameters ---${norm}"
newline
textblockSwitches "-r | --record | --records"
textblock "Comma-delimited list of hostnames for which IP addresses should be updated in CloudFlare DNS. This parameter is REQUIRED. Note that this script will only *update* records, it will not create new ones. If you supply hostnames that are not already defined in DNS, the script will log a warning and will skip those hostnames."
newline
textblockSwitches "-i | --ip | --ip-address | -a | --address"
textblock "New IP address for DNS host records. If you omit this, the script will attempt to auto-detect your public IP address and use that."
newline
textblockSwitches "-4 | --ip4 | --ipv4"
textblock "Switch value. Update Host 'A' records (IP4) only. Note that this script can only update either A *or* AAAA records. If you need to update both, you'll have to run the script once in IP4 mode and again in IP6 mode. If you specify both this switch and the IP6 switch, the last one specified will take effect."
textblockDefaults "(enabled: update A records)"
newline
textblockSwitches "-6 | --ip6 | --ipv6"
textblock "Switch value. Update Host 'AAAA' records (IP6) only. Note that this script can only update either A *or* AAAA records. If you need to update both, you'll have to run the script once in IP4 mode and again in IP6 mode. If you specify both this switch and the IP4 switch, the last one specified will take effect."
textblockDefaults "(disabled: update A records)"
newline
textblock "Please refer to the repo README for more detailed information regarding this script and how to automate and monitor it."
newline
exit 0
}
scriptExamples() {
newline
printf "Update CloudFlare DNS host A/AAAA records with current IP address.\n"
printf "%sUsage: %s --records host.domain.tld[,host2.domain.tld,...] [parameters]%s\n\n" "$bold" "$scriptName" "$norm"
textblock "${magenta}--- usage examples ---${norm}"
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net"
textblock "Update CloudFlare DNS records for myserver.mydomain.net with the auto-detected public IP4 address. Credentials will be expected in the default location and the log will be written in the default location also."
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net -6"
textblock "Same as above, but update AAAA host records with the auto-detected public IP6 address."
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net,otherserver.mydomain.net -l /var/log/cfddns.log --nc"
textblock "Update DNS entries for both listed hosts using auto-detected IP4 address. Write a non-coloured log to '/var/log/cfddns.log'."
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net,otherserver.mydomain.net -l /var/log/cfddns.log --ip6 --ip fd21:7a62:2737:9c3a::a151"
textblock "Update DNS AAAA entries for listed hosts using the *specified* IP address. Write a colourful log to the location specified."
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net -c /root/cloudflare.creds -l /var/log/cfddns.log --ip 1.2.3.4"
textblock "Update DNS A entry for listed hostname with the provided IP address. Read cloudflare credentials file from specified location, save log in specified location."
newline
textblockSwitches "${scriptName} -r myserver.mydomain.net -c /root/cloudflare.creds -l /var/log/cfddns.log -6 -i fd21:7a62:2737:9c3a::a151"
textblock "Exact same as above, but change the AAAA record. This is how you run the script once for IP4 and again for IP6."
exit 0
}
textblock() {
printf "%s\n" "$1" | fold -w "$width" -s
}
textblockDefaults() {
printf "%s%s%s\n" "$yellow" "$1" "$norm"
}
textblockSwitches() {
printf "%s%s%s\n" "$cyan" "$1" "$norm"
}
newline() {
printf "\n"
}
### default variable values
scriptPath="$(CDPATH='' \cd -- "$(dirname -- "$0")" && pwd -P)"
scriptName="$(basename "$0")"
logFile="$scriptPath/${scriptName%.*}.log"
accountFile="$scriptPath/cloudflare.credentials"
colourizeLogFile=1
dnsRecords=""
dnsSeparator=","
ipAddress=""
ip4=1
ip6=0
ip4DetectionSvc="http://ipv4.icanhazip.com"
ip6DetectionSvc="http://ipv6.icanhazip.com"
invalidDomainCount=0
failedDomainCount=0
### process startup parameters
if [ -z "$1" ]; then
scriptHelp
fi
while [ $# -gt 0 ]; do
case "$1" in
-h | -\? | --help)
# display help
scriptHelp
;;
--examples)
# display sample commands
scriptExamples
;;
-l | --log)
# set log file location
if [ -n "$2" ]; then
logFile="${2%/}"
shift
else
badParam null "$@"
fi
;;
--log-console)
# log to the console instead of a file
logFile="/dev/stdout"
;;
--no-log)
# do not log anything
logFile="/dev/null"
;;
--nc | --no-color | --no-colour)
# do not colourize log file
colourizeLogFile=0
;;
-c | --cred* | -f)
# path to CloudFlare credentials file
if [ -n "$2" ]; then
if [ -f "$2" ] && [ -s "$2" ]; then
accountFile="${2%/}"
shift
else
badParam dne "$@"
fi
else
badParam null "$@"
fi
;;
-r | --record | --records)
# DNS records to update
if [ -n "$2" ]; then
dnsRecords=$(printf "%s" "$2" | sed -e 's/ //g')
shift
else
badParam null "$@"
fi
;;
-i | --ip | --ip-address | -a | --address)
# IP address to use (not parsed for correctness)
if [ -n "$2" ]; then
ipAddress="$2"
shift
else
badParam null "$@"
fi
;;
-4 | --ip4 | --ipv4)
# operate in IP4 mode (default)
ip4=1
ip6=0
;;
-6 | --ip6 | --ipv6)
# operate in IP6 mode
ip6=1
ip4=0
;;
*)
printf "\n%sUnknown option: %s\n" "$err" "$1"
printf "%sUse '--help' for valid options.%s\n\n" "$cyan" "$norm"
exit 1
;;
esac
shift
done done
# Log beginning of script ### pre-flight checks
echo -e "${bold}${note}${stamp} -- Start CloudFlare" \ if ! command -v curl >/dev/null; then
"DDNS script execution --${normal}" >> "$logFile" printf "\n%sThis script requires 'curl' be installed and accessible. Exiting.%s\n\n" "$err" "$norm"
exit 2
# Check validity of parameters fi
if [ -z "$accountFile" ] || [[ $accountFile == -* ]]; then if ! command -v jq >/dev/null; then
quit 101 printf "\n%sThis script requires 'jq' be installed and accessible. Exiting.%s\n\n" "$err" "$norm"
elif [ ! -s "$accountFile" ]; then exit 2
quit 102 fi
elif [ -z "${dnsRecords}" ]; then [ -z "$dnsRecords" ] && badParam errMsg "You must specify at least one DNS record to update. Exiting."
quit 103 # verify credentials file exists and is not empty (default check)
if [ ! -f "$accountFile" ] || [ ! -s "$accountFile" ]; then
badParam errMsg "Cannot find CloudFlare credentials file (${accountFile}). Exiting."
fi
# turn off log file colourization if parameter is set
if [ "$colourizeLogFile" -eq 0 ]; then
bold=""
cyan=""
err=""
magenta=""
norm=""
ok=""
warn=""
yellow=""
fi fi
# Check if curl is installed ### initial log entries
command -v curl >> /dev/null {
curlResult="$?" printf "%s[%s] -- CloudFlare DDNS update-script: execution starting --%s\n" "$ok" "$(stamp)" "$norm"
if [ "$curlResult" -ne 0 ]; then printf "%sParameters:\n" "$magenta"
quit 2 printf "script path: %s\n" "$scriptPath/$scriptName"
printf "credentials file: %s\n" "$accountFile"
} >>"$logFile"
if [ "$ip4" -eq 1 ]; then
printf "mode: IP4\n" >>"$logFile"
elif [ "$ip6" -eq 1 ]; then
printf "mode: IP6\n" >>"$logFile"
fi fi
# Log operating mode # detect and report IP address
if [ $ip4 -eq 1 ]; then
echo -e "${info}${stamp} Script running in" \
"IP4 mode${normal}" >> "$logFile"
elif [ $ip6 -eq 1 ]; then
echo -e "${info}${stamp} Script running in" \
"IP6 mode${normal}" >> "$logFile"
fi
## Extract needed information from accountDetails file
mapfile -t cfDetails < "$accountFile"
## Get current IP address, if not provided in parameters
if [ -z "$ipAddress" ]; then if [ -z "$ipAddress" ]; then
echo -e "${info}${stamp} No IP address for" \ # detect public ip address
"update provided. Detecting this machine's IP address...${normal}" \ if [ "$ip4" -eq 1 ]; then
>> "$logFile" if ! ipAddress="$(curl -s $ip4DetectionSvc)"; then
if [ $ip4 -eq 1 ]; then printf "ddns ip address: %serror%s\n" "$err" "$norm" >>"$logFile"
ipAddress=$(curl -s http://ipv4.icanhazip.com) exitError 10
elif [ $ip6 -eq 1 ]; then
ipAddress=$(curl -s http://ipv6.icanhazip.com)
fi
# check if curl reported any errors
ipLookupResult="$?"
if [ "$ipLookupResult" -ne 0 ]; then
quit 201
fi fi
fi fi
echo -e "${info}${stamp} -- [INFO] Using IP address:" \ if [ "$ip6" -eq 1 ]; then
"$ipAddress" >> "$logFile" if ! ipAddress="$(curl -s $ip6DetectionSvc)"; then
printf "ddns ip address: %serror%s\n" "$err" "$norm" >>"$logFile"
exitError 10
## Check if desired record(s) exist at CloudFlare
# perform checks on A or AAAA records based on invocation options
if [ $ip4 -eq 1 ]; then
echo -e "${normal}${stamp} -- [INFO] Updating A records: ${dnsRecords[*]}" \
>> "$logFile"
for cfLookup in "${dnsRecords[@]}"; do
cfRecords+=("$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/${cfDetails[2]}/dns_records?name=$cfLookup&type=A" -H "X-Auth-Email: ${cfDetails[0]}" -H "X-Auth-Key: ${cfDetails[1]}" -H "Content-Type: application/json")")
done
elif [ $ip6 -eq 1 ]; then
echo -e "${normal}${stamp} -- [INFO] Updating AAAA records:"\
"${dnsRecords[*]}" >> "$logFile"
for cfLookup in "${dnsRecords[@]}"; do
cfRecords+=("$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/${cfDetails[2]}/dns_records?name=$cfLookup&type=AAAA" -H "X-Auth-Email: ${cfDetails[0]}" -H "X-Auth-Key: ${cfDetails[1]}" -H "Content-Type: application/json")")
done
fi fi
# check for curl errors
cfLookupResult="$?"
if [ "$cfLookupResult" -ne 0 ]; then
quit 254
fi fi
# check for any non-existant domain names and remove from array printf "ddns ip address (detected): %s\n" "$ipAddress" >>"$logFile"
for recordIdx in "${!cfRecords[@]}"; do
if [[ ${cfRecords[recordIdx]} == *"\"count\":0"* ]]; then
# inform user that domain not found in CloudFlare DNS records
echo -e "${err}${stamp} -- [INFO]" \
"${dnsRecords[recordIdx]} not found in your" \
"CloudFlare DNS records --${normal}" >> "$logFile"
# remove the entry from the dnsRecords array
unset "dnsRecords[$recordIdx]"
# remove the entry from the records array
unset "cfRecords[$recordIdx]"
fi
done
# contract the dnsRecords and cfRecords arrays to re-order them after any
# deleted records
dnsRecords=("${dnsRecords[@]}")
cfRecords=("${cfRecords[@]}")
# after trimming errant records, it's possible dnsRecords array is empty
# check for this condition and exit (nothing to do), otherwise list arrays
if [ -z "${dnsRecords}" ]; then
quit 104
else else
for recordIdx in "${!cfRecords[@]}"; do printf "ddns ip address (supplied): %s\n" "$ipAddress" >>"$logFile"
echo -e "${normal}${stamp} Found" \
"${dnsRecords[recordIdx]} (Index: $recordIdx)" \
>> "$logFile"
done
fi fi
# iterate DNS records to update
## Get existing IP address and identifier in CloudFlare's DNS records dnsRecordsToUpdate="$dnsRecords$dnsSeparator"
for recordIdx in "${!cfRecords[@]}"; do while [ "$dnsRecordsToUpdate" != "${dnsRecordsToUpdate#*${dnsSeparator}}" ] && { [ -n "${dnsRecordsToUpdate%%${dnsSeparator}*}" ] || [ -n "${dnsRecordsToUpdate#*${dnsSeparator}}" ]; }; do
currentIP+=($(echo "${cfRecords[recordIdx]}" | \ record="${dnsRecordsToUpdate%%${dnsSeparator}*}"
grep -Po '(?<="content":")[^"]*')) dnsRecordsToUpdate="${dnsRecordsToUpdate#*${dnsSeparator}}"
recordID+=($(echo "${cfRecords[recordIdx]}" | \ printf "updating record: %s\n" "$record" >>"$logFile"
grep -Po '(?<="id":")[^"]*'))
echo -e "${normal}${stamp} Index $recordIdx:" \
"For record ${lit}${dnsRecords[recordIdx]}${normal}" \
"with ID: ${recordID[recordIdx]}" \
"the current IP is ${lit}${currentIP[recordIdx]}" \
"${normal}" >> "$logFile"
done done
## Check whether new IP matches old IP and update if they do not match printf "(end of parameter list)%s\n" "$norm" >>"$logFile"
for recordIdx in "${!currentIP[@]}"; do
if [ "${currentIP[recordIdx]}" = "$ipAddress" ]; then ### read CloudFlare credentials
echo -e "${bold}${ok}${stamp} -- [STATUS]" \ printf "[%s] Reading CloudFlare credentials... " "$(stamp)" >>"$logFile"
"${dnsRecords[recordIdx]} is up-to-date.${normal}" \ case "$accountFile" in
>> "$logFile" /*)
else # absolute path, use as-is
echo -e "${info}${stamp} -- [STATUS]" \ # shellcheck source=./cloudflare.credentials
"${dnsRecords[recordIdx]} needs updating...${normal}" \ . "$accountFile"
>> "$logFile" ;;
if [ $ip4 -eq 1 ]; then *)
# update record at CloudFlare with new IP # relative path, rewrite
update=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/${cfDetails[2]}/dns_records/${recordID[recordIdx]}" -H "X-Auth-Email: ${cfDetails[0]}" -H "X-Auth-Key: ${cfDetails[1]}" -H "Content-Type: application/json" --data "{\"id\":\"${cfDetails[2]}\",\"type\":\"A\",\"proxied\":false,\"name\":\"${dnsRecords[recordIdx]}\",\"content\":\"$ipAddress\"}") # shellcheck source=./cloudflare.credentials
elif [ $ip6 -eq 1 ]; then . "./$accountFile"
# update record at CloudFlare with new IP ;;
update=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/${cfDetails[2]}/dns_records/${recordID[recordIdx]}" -H "X-Auth-Email: ${cfDetails[0]}" -H "X-Auth-Key: ${cfDetails[1]}" -H "Content-Type: application/json" --data "{\"id\":\"${cfDetails[2]}\",\"type\":\"AAAA\",\"proxied\":false,\"name\":\"${dnsRecords[recordIdx]}\",\"content\":\"$ipAddress\"}") esac
if [ -z "$cfEmail" ]; then
printf "%sERROR%s\n" "$err" "$norm" >>"$logFile"
exitError 20
elif [ -z "$cfKey" ]; then
printf "%sERROR%s\n" "$err" "$norm" >>"$logFile"
exitError 21
elif [ -z "$cfZoneId" ]; then
printf "%sERROR%s\n" "$err" "$norm" >>"$logFile"
exitError 22
fi fi
# check for success code from CloudFlare printf "DONE%s\n" "$norm" >>"$logFile"
if [[ $update == *"\"success\":true"* ]]; then
echo -e "${bold}${ok}${stamp} -- [SUCCESS]" \ ### check if records to be updated exist and if they need updating, update as required
"${dnsRecords[recordIdx]} updated.${normal}" >> "$logFile" dnsRecordsToUpdate="$dnsRecords$dnsSeparator"
if [ "$ip4" -eq 1 ]; then
recordType="A"
elif [ "$ip6" -eq 1 ]; then
recordType="AAAA"
fi
while [ "$dnsRecordsToUpdate" != "${dnsRecordsToUpdate#*${dnsSeparator}}" ] && { [ -n "${dnsRecordsToUpdate%%${dnsSeparator}*}" ] || [ -n "${dnsRecordsToUpdate#*${dnsSeparator}}" ]; }; do
record="${dnsRecordsToUpdate%%${dnsSeparator}*}"
dnsRecordsToUpdate="${dnsRecordsToUpdate#*${dnsSeparator}}"
printf "[%s] Processing %s... " "$(stamp)" "$record" >>"$logFile"
# check for existing record, else exit with error (this script does NOT create new records, only updates them!)
if ! cfResult="$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/${cfZoneId}/dns_records?name=${record}&type=${recordType}" \
-H "Authorization: Bearer ${cfKey}" \
-H "Content-Type: application/json")"; then
printf "%sERROR%s\n" "$err" "$norm" >>"$logFile"
exitError 25
fi
resultCount="$(printf "%s" "$cfResult" | jq '.result_info.count')"
if [ "$resultCount" = "0" ]; then
printf "%sNOT FOUND%s\n" "$warn" "$norm" >>"$logFile"
printf "%s[%s] WARNING: Cannot find existing record to update for DNS entry: %s%s\n" "$warn" "$(stamp)" "$record" "$norm" >>"$logFile"
invalidDomainCount=$((invalidDomainCount + 1))
else else
failedDNS+=("${dnsRecords[recordIdx]}") objectId=$(printf "%s" "$cfResult" | jq -r '.result | .[] | .id')
currentIpAddr=$(printf "%s" "$cfResult" | jq -r '.result | .[] | .content')
printf "FOUND: IP = %s\n" "$currentIpAddr" >>"$logFile"
# check if record needs updating
if [ "$currentIpAddr" = "$ipAddress" ]; then
printf "%s[%s] IP address for %s is already up-to-date%s\n" "$ok" "$(stamp)" "$record" "$norm" >>"$logFile"
else
# update record
printf "%s[%s] Updating IP address for %s... " "$cyan" "$(stamp)" "$record" >>"$logFile"
updateJSON="$(jq -n --arg key0 content --arg value0 "${ipAddress}" '{($key0):$value0}')"
if ! cfResult="$(curl -s -X PATCH "https://api.cloudflare.com/client/v4/zones/${cfZoneId}/dns_records/${objectId}" \
-H "Authorization: Bearer ${cfKey}" \
-H "Content-Type: application/json" \
--data "${updateJSON}")"; then
printf "%sERROR%s\n" "$err" "$norm" >>"$logFile"
exitError 25
fi
updateSuccess="$(printf "%s" "$cfResult" | jq '.success')"
if [ "$updateSuccess" = "true" ]; then
printf "DONE%s\n" "$norm" >>"$logFile"
printf "%s[%s] SUCCESS: IP address for %s updated%s\n" "$ok" "$(stamp)" "$record" "$norm" >>"$logFile"
else
printf "%sFAILED%s\n" "$err" "$norm" >>"$logFile"
printf "%s[%s] ERROR: Unable to update IP address for %s%s\n" "$err" "$(stamp)" "$record" "$norm" >>"$logFile"
failedDomainCount=$((failedDomainCount + 1))
fi
fi fi
fi fi
done done
# Check if failedDNS array contains entries and exit with error, else exit 0 # exit
if [ -z "${failedDNS}" ]; then if [ "$invalidDomainCount" -ne 0 ]; then
quit printf "%s[%s] -- WARNING: %s invalid domain(s) were supplied for updating --%s\n" "$warn" "$(stamp)" "$invalidDomainCount" "$norm" >>"$logFile"
fi
if [ "$failedDomainCount" -ne 0 ]; then
exitError 98
else else
quit 199 exitOK
fi fi
# this code should never be executed ### exit return codes
exit 99 # 0: normal exit, no errors
# 1: invalid or unknown parameter
# 2: cannot find or access required external program(s)
# 10: cannot auto-detect IP address
# 20: accountFile has a null or missing cfEmail variable
# 21: accountFile has a null or missing cfKey variable
# 22: accountFile has a null or missing cfZoneId variable
# 25: unable to query CloudFlare account
# 97: script completed with warnings
# 98: one or more updates failed
# 99: unspecified error occurred