629 lines
20 KiB
Bash
629 lines
20 KiB
Bash
#!/bin/sh
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#######
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### mailcow backup using borgbackup
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### this assumes three things:
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### 1. standard mailcow-dockerized setup as per the docs
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### 2. using borg to perform backups to ssh-capable remote server
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### 3. remote repo already set-up and configured
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#######
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### text formatting presents
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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)$(tput setaf 3)
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width=$(tput cols)
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yellow=$(tput setaf 3)
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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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width=80
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yellow=""
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fi
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### trap
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trap trapExit 1 2 3 6
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### functions
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# bad configuration value passed in details file
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badDetails () {
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if [ "$1" = "empty" ]; then
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exitError 130 "details:${2} cannot be NULL (undefined)"
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elif [ "$1" = "dne" ]; then
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exitError 131 "details:${2} file or directory does not exist."
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fi
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}
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# bad parameter passed to script
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badParam () {
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if [ "$1" = "dne" ]; then
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printf "\n%sError: '%s %s'\n" "$err" "$2" "$3"
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printf "file or directory does not exist.%s\n\n" "$norm"
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exit 1
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elif [ "$1" = "empty" ]; then
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printf "\n%sError: '%s' cannot have a NULL (empty) value.\n" "$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 [ "$1" = "svc" ]; then
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printf "\n%sError: '%s %s': Service does not exist!%s\n\n" \
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"$err" "$2" "$3" "$norm"
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exit 1
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elif [ "$1" = "user" ]; then
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printf "\n%sError: '%s %s': User does not exist!%s\n\n" \
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"$err" "$2" "$3" "$norm"
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exit 1
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fi
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}
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# cleanup
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cleanup () {
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# cleanup 503 if copied
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if [ "$err503Copied" -eq 1 ]; then
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if ! rm -f "$webroot/$err503File" 2>>"$logFile"; then
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printf "%s[%s] -- [WARNING] Could not remove 503 error page." \
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"$warn" "$(stamp)" >> "$logFile"
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printf " Web interface will not function until this file is " \
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>> "$logFile"
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printf "removed --%s\n" "$norm" >> "$logFile"
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warnCount=$((warnCount+1))
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else
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printf "%s[%s] -- [INFO] 503 error page removed --%s\n" \
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"$cyan" "$(stamp)" "$norm" >> "$logFile"
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fi
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fi
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}
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# call cleanup and then exit with error report
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exitError () {
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printf "%s[%s] -- [ERROR] %s: %s --%s\n" \
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"$err" "$(stamp)" "$1" "$2" "$norm" >> "$logFile"
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cleanup
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# note script completion with error
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printf "%s[%s] --- %s execution completed with error ---%s\n" \
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"$err" "$(stamp)" "$scriptName" "$norm" >> "$logFile"
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exit "$1"
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}
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# display script help information
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scriptHelp () {
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newline
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printf "%sUsage: %s [parameters]%s\n\n" "$bold" "$scriptName" "$norm"
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textblock "There are NO mandatory parameters. If a parameter is not supplied, its default value will be used. In the case of a switch parameter, it will remain DEactivated if NOT specified."
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newline
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textblock "Switches are listed then followed by a description of their effect on the following line. Finally, if a default value exists, it will be listed on the next line in (parentheses)."
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newline
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textblock "${magenta}--- script related parameters ---${norm}"
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newline
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switchTextblock "-c | --config | --details"
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textblock "Path to the configuration key/value-pair file for this script."
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defaultsTextblock "(scriptPath/scriptName.details)"
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newline
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switchTextblock "-h | -? | --help"
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textblock "This help screen"
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newline
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switchTextblock "-l | --log"
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textblock "Path to write log file"
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defaultsTextblock "(scriptPath/scriptName.log)"
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newline
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switchTextblock "[SWITCH] -v | --verbose"
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textblock "Log borg output with increased verbosity (list all files). Careful! Your log file can get very large very quickly!"
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defaultsTextblock "(normal output, option is OFF)"
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newline
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textblock "${magenta}--- 503 functionality ---${norm}"
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newline
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switchTextblock "[SWITCH] -5 | --use-503"
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textblock "Copy an 'error 503' page/indicator file to your webroot for your webserver to find. Specifying this option will enable other 503 options."
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defaultsTextblock "(do NOT copy, option is OFF)"
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newline
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switchTextblock "--503-path"
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textblock "Path to the file you want copied to your webroot as the 'error 503' page."
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defaultsTextblock "(scriptPath/503_backup.html)"
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newline
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switchTextblock "-w | --webroot"
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textblock "Path to where the 'error 503' file should be copied."
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defaultsTextblock "(/usr/share/nginx/html/)"
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newline
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textblock "More details and examples of script usage can be found in the repo wiki at ${yellow}https://git.asifbacchus.app/asif/myGitea/wiki${norm}"
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newline
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}
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# generate dynamic timestamps
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stamp () {
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(date +%F" "%T)
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}
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textblock() {
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printf "%s\n" "$1" | fold -w "$width" -s
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}
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defaultsTextblock() {
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printf "%s%s%s\n" "$yellow" "$1" "$norm"
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}
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switchTextblock() {
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printf "%s%s%s\n" "$cyan" "$1" "$norm"
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}
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# print a blank line
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newline () {
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printf "\n"
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}
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# same as exitError but for signal captures
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trapExit () {
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printf "%s[%s] -- [ERROR] 99: Caught signal --%s\n" \
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"$err" "$(stamp)" "$norm" >> "$logFile"
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cleanup
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# note script completion with error
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printf "%s[%s] --- %s execution was terminated via signal ---%s\n" \
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"$err" "$(stamp)" "$scriptName" "$norm" >> "$logFile"
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exit 99
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}
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### end of functions
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### default variable values
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## script related
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# store logfile in the same directory as this script file using the same file
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# name as the script but with the extension '.log'
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scriptPath="$( CDPATH='' cd -- "$( dirname -- "$0" )" && pwd -P )"
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scriptName="$( basename "$0" )"
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logFile="$scriptPath/${scriptName%.*}.log"
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warnCount=0
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configDetails="$scriptPath/${scriptName%.*}.details"
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err503Copied=0
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exclusions=0
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# borg output verbosity -- normal
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borgCreateParams='--stats'
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borgPruneParams='--list'
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# 503 related
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use503=0
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err503Path="$scriptPath/503_backup.html"
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err503File="${err503Path##*/}"
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webroot="/usr/share/nginx/html"
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# mailcow/docker related
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mcConfig='/opt/mailcow-dockerized/mailcow.conf'
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mcDockerCompose="${mcConfig}/docker-compose.yml"
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dockerStartTimeout=180
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dockerStopTimeout=120
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### process startup parameters
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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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exit 0
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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 empty "$@"
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fi
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;;
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-c|--config|--details)
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# location of config details file
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if [ -n "$2" ]; then
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if [ -f "$2" ]; then
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configDetails="${2%/}"
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shift
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else
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badParam dne "$@"
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fi
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else
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badParam empty "$@"
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fi
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;;
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-v|--verbose)
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# set verbose logging from borg
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borgCreateParams='--list --stats'
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borgPruneParams='--list'
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;;
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-5|--use-503)
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# enable copying 503 error page to webroot
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use503=1
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;;
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--503-path)
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# FULL path to 503 file
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if [ -n "$2" ]; then
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if [ -f "$2" ]; then
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err503Path="${2%/}"
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err503File="${2##*/}"
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shift
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else
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badParam dne "$@"
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fi
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else
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badParam empty "$@"
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fi
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;;
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-w|--webroot)
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# path to webroot (copy 503)
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if [ -n "$2" ]; then
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if [ -d "$2" ]; then
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webroot="${2%/}"
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shift
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else
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badParam dne "$@"
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fi
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else
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badParam empty "$@"
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fi
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;;
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-d|--docker-compose)
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# path to mailcow docker-compose file
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if [ -n "$2" ]; then
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if [ -f "$2" ]; then
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mcDockerCompose="${2%/}"
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shift
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else
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badParam dne "$@"
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fi
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else
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badParam empty "$@"
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fi
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;;
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-m|--mailcow-config)
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# path to mailcow configuration file
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if [ -n "$2" ]; then
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if [ -f "$2" ]; then
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mcConfig="${2%/}"
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shift
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else
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badParam dne "$@"
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fi
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else
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badParam empty "$@"
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fi
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;;
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-t1|--timeout-start)
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if [ -z "$2" ]; then
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badParam empty "$@"
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else
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dockerStartTimeout="$2"
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fi
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;;
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-t2|--timeout-stop)
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if [ -z "$2" ]; then
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badParam empty "$@"
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else
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dockerStopTimeout="$2"
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fi
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;;
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*)
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printf "\n%sUnknown option: %s\n" "$err" "$1"
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printf "%sUse '--help' for valid options.%s\n\n" "$cyan" "$norm"
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exit 1
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;;
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esac
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shift
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done
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### check pre-requisites and default values
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# check if running as root, otherwise exit
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if [ "$( id -u )" -ne 0 ]; then
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printf "\n%sERROR: script MUST be run as ROOT%s\n\n" "$err" "$norm"
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exit 2
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fi
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# does the details file exist?
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if [ ! -f "$configDetails" ]; then
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badParam dne "(--details default)" "$configDetails"
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fi
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# is borg installed?
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if ! command -v borg > /dev/null; then
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printf "\n%sERROR: BORG is not installed on this system!%s\n\n" "$err" "$norm"
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exit 3
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fi
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# if 503 functionality is enabled, do 503 related files exist?
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if [ "$use503" -eq 1 ]; then
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if [ ! -f "$err503Path" ]; then
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badParam dne "(--503-path default)" "$err503Path"
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elif [ ! -d "$webroot" ]; then
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badParam dne "(--webroot default)" "$webroot"
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fi
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fi
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# verify mailcow.conf location and extract path
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if [ -f "$mcConfig" ]; then
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# strip filename and get path
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mcPath=${mcConfig%/*/}
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else
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badParam dne "(--mailcow-config)" "$mcConfig"
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fi
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# verify docker-compose file exists
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if [ ! -f "$mcDockerCompose" ]; then
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badParam dne "(--docker-compose)" "$mcDockerCompose"
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fi
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### start logging
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printf "%s[%s] --- Start %s execution ---%s\n" \
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"$magenta" "$(stamp)" "$scriptName" "$norm" >> "$logFile"
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printf "%s[%s] -- [INFO] Log located at %s%s%s --%s\n" \
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"$cyan" "$(stamp)" "$yellow" "$logFile" "$cyan" "$norm" >> "$logFile"
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### 503 functionality
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if [ "$use503" -eq 1 ]; then
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printf "%s[%s] -- [INFO] Copying 503 error page to " \
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"$cyan" "$(stamp)" >> "$logFile"
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printf "webroot -- %s\n" "$norm">> "$logFile"
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if ! cp --force "${err503Path}" "${webroot}/${err503File}" 2>> "$logFile"
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then
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printf "%s[%s] -- [WARNING] Failed to copy 503 error page. " \
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"$warn" "$(stamp)" >> "$logFile"
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printf "Web users will NOT be notified --%s\n" "$norm" >> "$logFile"
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warnCount=$((warnCount+1))
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else
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printf "%s[%s] -- [SUCCESS] 503 error page copied --%s\n" \
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"$ok" "$(stamp)" "$norm" >> "$logFile"
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# set cleanup flag
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err503Copied=1
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fi
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fi
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### read details file to get variables needed run borg
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# check if config details file was provided as a relative or absolute path
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case "${configDetails}" in
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/*)
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# absolute path, no need to rewrite variable
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. "${configDetails}"
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;;
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*)
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# relative path, prepend './' to create absolute path
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. "./${configDetails}"
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;;
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esac
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printf "%s[%s] -- [INFO] %s%s%s imported --%s\n" \
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"$cyan" "$(stamp)" "$yellow" "$configDetails" "$cyan" "$norm" >> "$logFile"
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### Run borg variable checks
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printf "%s[%s] -- [INFO] Verifying supplied borg details --%s\n" \
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"$cyan" "$(stamp)" "$norm" >> "$logFile"
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## read additional files -- this is required otherwise nothing to backup!
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if [ -z "${borgXtraListPath}" ]; then
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badDetails empty 'xtraLocations'
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else
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# check if file actually exists
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if [ ! -f "${borgXtraListPath}" ]; then
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badDetails dne 'borgXtraListPath'
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fi
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# read file contents into concatenated list for echo to cmdline
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while read -r xtraItem; do
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if [ -z "${xtraList}" ]; then
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xtraList="${xtraItem}"
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else
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xtraList="${xtraList} ${xtraItem}"
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fi
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done <<EOF
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$( sed -e '/^\s*#.*$/d' -e '/^\s*$/d' "${borgXtraListPath}" )
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EOF
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printf "%sdetails:borgXtraListPath %s-- %s[OK]%s\n" \
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"$magenta" "$norm" "$ok" "$norm" >> "$logFile"
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fi
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## verify borg base directory
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if [ -z "${borgBaseDir}" ]; then
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badDetails empty 'borgBaseDir'
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elif [ ! -d "${borgBaseDir}" ]; then
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badDetails dne 'borgBaseDir'
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fi
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printf "%sdetails:borgBaseDir %s-- %s[OK]%s\n" \
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"$magenta" "$norm" "$ok" "$norm" >> "$logFile"
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export BORG_BASE_DIR="${borgBaseDir%/}"
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## check path to SSH keyfile
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if [ -z "${borgSSHKey}" ]; then
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badDetails empty 'borgSSHKey'
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elif [ ! -f "${borgSSHKey}" ]; then
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badDetails dne 'borgSSHKey'
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fi
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printf "%sdetails:borgSSHKey %s-- %s[OK]%s\n" \
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"$magenta" "$norm" "$ok" "$norm" >> "$logFile"
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export BORG_RSH="ssh -i ${borgSSHKey}"
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## check borg repo connect string
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if [ -z "${borgConnectRepo}" ]; then
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badDetails empty 'borgConnectRepo'
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fi
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printf "%sdetails:borgConnectRepo %s-- %s[OK]%s\n" \
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"$magenta" "$norm" "$ok" "$norm" >> "$logFile"
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export BORG_REPO="${borgConnectRepo}"
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## check borg repo password
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if [ -n "${borgRepoPassphrase}" ]; then
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printf "%sdetails:borgRepoPassphrase %s-- %s[OK]%s\n" \
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"$magenta" "$norm" "$ok" "$norm" >> "$logFile"
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export BORG_PASSPHRASE="${borgRepoPassphrase}"
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else
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# if passwd is blank intentionally, this is insecure
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printf "%s-- [WARNING] Using a borg repo without a password is an " \
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"$warn" >> "$logFile"
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printf "insecure configuration --%s\n" "$norm">> "$logFile"
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warnCount=$((warnCount+1))
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# if this was an accident, we need to provide a bogus passwd so borg fails
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# otherwise it will sit forever just waiting for input
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export BORG_PASSPHRASE="DummyPasswordSoBorgFails"
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fi
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## check borg repository keyfile location
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if [ -z "${borgKeyfileLocation}" ]; then
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printf "%sdetails:borgKeyfileLocation %s-- %s[DEFAULT]%s\n" "$magenta" "$norm" "$ok" "$norm" >> "$logFile"
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else
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# check if keyfile location exists
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if [ ! -f "${borgKeyfileLocation}" ]; then
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badDetails dne 'borgKeyfileLocation'
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fi
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printf "%sdetails:borgKeyfileLocation %s-- %s[OK]%s\n" "$magenta" "$norm" "$ok" "$norm" >> "$logFile"
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export BORG_KEY_FILE="${borgKeyfileLocation}"
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fi
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## export borg remote path, if specified
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if [ -n "${borgRemote}" ]; then export BORG_REMOTE_PATH="${borgRemote}"; fi
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## check if exlusion list file is specified
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if [ -n "${borgExcludeListPath}" ]; then
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# check if the file actually exists
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if [ ! -f "${borgExcludeListPath}" ]; then
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badDetails dne 'borgExcludeListPath'
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fi
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exclusions=1
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fi
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### create borg temp dir:
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## python requires a writable temporary directory when unpacking borg and
|
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## executing commands. This defaults to /tmp but many systems mount /tmp with
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## the 'noexec' option for security. Thus, we will use/create a 'tmp' folder
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## within the BORG_BASE_DIR and instruct python to use that instead of /tmp
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# check if BORG_BASE_DIR/tmp exists, if not, create it
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if [ ! -d "${borgBaseDir}/tmp" ]; then
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if ! mkdir "${borgBaseDir}/tmp"; then
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exitError 132 "Unable to create borg ${borgBaseDir}/tmp directory"
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else
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printf "%s[%s] -- [INFO] Created %s%s/tmp " \
|
|
"$cyan" "$(stamp)" "$yellow" "${borgBaseDir}" >> "$logFile"
|
|
printf "%s--%s\n" "$cyan" "$norm">> "$logFile"
|
|
fi
|
|
fi
|
|
export TMPDIR="${borgBaseDir}/tmp"
|
|
|
|
|
|
### execute borg depending on whether exclusions are defined
|
|
|
|
## construct the proper borg commandline
|
|
# base command
|
|
if [ "$exclusions" -eq 0 ]; then
|
|
borgCMD="borg --show-rc create ${borgCreateParams} \
|
|
::$(date +%Y-%m-%d_%H%M%S) \
|
|
${xtraList}"
|
|
elif [ "$exclusions" -eq 1 ]; then
|
|
borgCMD="borg --show-rc create ${borgCreateParams} \
|
|
--exclude-from ${borgExcludeListPath} \
|
|
::$(date +%Y-%m-%d_%H%M%S) \
|
|
${xtraList}"
|
|
fi
|
|
|
|
# execute borg
|
|
printf "%s[%s] -- [INFO] Executing borg backup operation --%s\n" \
|
|
"$cyan" "$(stamp)" "$norm" >> "$logFile"
|
|
${borgCMD} 2>> "$logFile"
|
|
borgResult="$?"
|
|
|
|
## check borg exit status
|
|
if [ "$borgResult" -eq 0 ]; then
|
|
printf "%s[%s] -- [SUCCESS] Borg backup completed --%s\n" \
|
|
"$ok" "$(stamp)" "$norm" >> "$logFile"
|
|
elif [ "$borgResult" -eq 1 ]; then
|
|
printf "%s[%s] -- [WARNING] Borg completed with warnings. " \
|
|
"$warn" "$(stamp)" >> "$logFile"
|
|
printf "Review this logfile for details --%s\n" "$norm">> "$logFile"
|
|
warnCount=$((warnCount+1))
|
|
elif [ "$borgResult" -ge 2 ]; then
|
|
err_1="Borg exited with a critical error. Please review this log file"
|
|
err_2="for details."
|
|
exitError 138 "$err_1 $err_2"
|
|
else
|
|
printf "%s[%s] -- [WARNING] Borg exited with unknown return code. " \
|
|
"$warn" "$(stamp)" >> "$logFile"
|
|
printf "Review this logfile for details --%s\n" "$norm">> "$logFile"
|
|
warnCount=$((warnCount+1))
|
|
fi
|
|
|
|
|
|
### execute borg prune if paramters are provided, otherwise skip with a warning
|
|
if [ -n "${borgPruneSettings}" ]; then
|
|
printf "%s[%s] -- [INFO] Executing borg prune operation --%s\n" \
|
|
"$cyan" "$(stamp)" "$norm" >> "$logFile"
|
|
borg prune --show-rc -v ${borgPruneParams} ${borgPruneSettings} \
|
|
2>> "$logFile"
|
|
borgPruneResult="$?"
|
|
else
|
|
printf "%s[%s] -- [WARNING] No prune parameters provided. " \
|
|
"$warn" "$(stamp)" >> "$logFile"
|
|
printf "Your archive will continue growing with each backup --%s\n" \
|
|
"$norm" >> "$logFile"
|
|
warnCount=$((warnCount+1))
|
|
fi
|
|
|
|
## report on prune operation if executed
|
|
if [ -n "${borgPruneResult}" ]; then
|
|
if [ "${borgPruneResult}" -eq 0 ]; then
|
|
printf "%s[%s] -- [SUCCESS] Borg prune completed --%s\n" \
|
|
"$ok" "$(stamp)" "$norm" >> "$logFile"
|
|
elif [ "$borgPruneResult" -eq 1 ]; then
|
|
printf "%s[%s] -- [WARNING] Borg prune completed with warnings. " \
|
|
"$warn" "$(stamp)" >> "$logFile"
|
|
printf "Review this logfile for details --%s\n" "$norm" >> "$logFile"
|
|
warnCount=$((warnCount+1))
|
|
elif [ "$borgPruneResult" -ge 2 ]; then
|
|
err_1="Borg prune exited with a critical error. Please review this"
|
|
err_2="log file for details."
|
|
exitError 139 "$err_1 $err_2"
|
|
else
|
|
printf "%s[%s] -- [WARNING] Borg prune exited with an unknown " \
|
|
"$warn" "$(stamp)" >> "$logFile"
|
|
printf "return code. Review this logfile for details --%s\n" \
|
|
"$norm" >> "$logFile"
|
|
warnCount=$((warnCount+1))
|
|
fi
|
|
fi
|
|
|
|
|
|
### all processes successfully completed, cleanup and exit gracefully
|
|
|
|
# note successful completion of borg commands
|
|
printf "%s[%s] -- [SUCCESS] Backup operations completed --%s\n" \
|
|
"$ok" "$(stamp)" "$norm" >> "$logFile"
|
|
|
|
# cleanup
|
|
cleanup
|
|
|
|
# note complete success, tally warnings and exit
|
|
printf "%s[%s] -- [SUCCESS] All processes completed --%s\n" \
|
|
"$ok" "$(stamp)" "$norm" >> "$logFile"
|
|
printf "%s[%s] --- %s execution completed ---%s\n" \
|
|
"$magenta" "$(stamp)" "$scriptName" "$norm" >> "$logFile"
|
|
if [ "$warnCount" -gt 0 ]; then
|
|
printf "%s%s warnings issued!%s\n" "$warn" "${warnCount}" "$norm" >> "$logFile"
|
|
else
|
|
printf "%s0 warnings issued.%s\n" "$ok" "$norm" >> "$logFile"
|
|
fi
|
|
exit 0
|
|
|
|
|
|
### error codes
|
|
# 1: parameter error
|
|
# 2: not run as root
|
|
# 3: borg not installed
|
|
# 99: TERM signal trapped
|
|
# 130: null configuration variable in details file
|
|
# 131: invalid configuration variable in details file
|
|
# 138: borg exited with a critical error
|
|
# 139: borg prune exited with a critical error |