noip/install at master · f3flight/noip · GitHub

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#!/bin/bash

prg=`basename $0`
localCommand=install
declare -A folder=(
  [bin]=/usr/sbin
  [cfg]=/etc/noip
  [systemd]=/etc/systemd/system
)


function info()
{
    echo "INFO: $1"
}


function fail()
{
    echo "ERROR: $1" 1>&2
    exit 1
}

function usage() {
    cat <<EOH

usage:
    ${prg} {[--install|-i|--uninstall|-u]}

    --uninstall|-u : uninstall noip
    --install|-i   : install noip

EOH

}

function createFolders() {
    for i in "${!folder[@]}"; do
      mkdir -p ${folder[$i]}
    done
}

function callerUserId() {
  ## identify user in a bash script called by sudo
  ## https://stackoverflow.com/questions/3522341/identify-user-in-a-bash-script-called-by-sudo/3522393

  ## Login name of the user who invoked sudo
  ## https://www.sudo.ws/man/sudo.man.html#SUDO_USER
  local user=${SUDO_USER:-$(whoami)}
  echo $user
}

function secureConfig() {
  chown -R `callerUserId` ${folder[cfg]}
  chmod -R 600 ${folder[cfg]}/*.netrc
}

function copyCfgFiles() {
    for filepath in `ls etc/noip/*`; do
        destFile=${folder[cfg]}/`basename $filepath`
        [[  ! -e  $destFile ]] && \
            cp $filepath $destFile
    done
}

function copyFiles() {
  cp usr/sbin/* ${folder[bin]}
  copyCfgFiles
  cp -R etc/systemd/system/* ${folder[systemd]}
}

function install() {
  rootCheck
  createFolders
  copyFiles
  secureConfig
  systemctl daemon-reload
  postInstallInstructions
  info "Done!"
}

function postInstallInstructions() {
  cat <<END

  DON'T FORGET to edit config file ${folder[cfg]}/noip.conf

  Useful commands :
    Start noip : sudo systemctl start noip
    Check noip status and log : sudo systemctl status noip
    Enable noip to start on boot : sudo systemctl enable noip

END
}

function removeUnmodifiedCfgFiles() {
    for filepath in `ls etc/noip/*`; do
        filename=`basename $filepath`
        cmp $filepath ${folder[cfg]}/$filename > /dev/null 2>&1
        bothEquals=$?
        [[ -f ${folder[cfg]}/$filename && $bothEquals -eq 0 ]] && \
            rm ${folder[cfg]}/$filename > /dev/null 2>&1
    done

    rmdir ${folder[cfg]} > /dev/null 2>&1
}

function uninstall() {
    rootCheck
    systemctl stop noip
    systemctl disable noip
    rm ${folder[bin]}/noip > /dev/null 2>&1
    removeUnmodifiedCfgFiles
    rm ${folder[systemd]}/noip.service > /dev/null 2>&1
    systemctl daemon-reload
    info "Done!"
}

function parseArgs() {
  while [ $# -gt 0 ]; do
      case "$1" in
          --uninstall|-u)
              localCommand=uninstall
              ;;
          --install|-i)
              localCommand=install
              ;;
          *)
              usage
              exit 1
              ;;
      esac
      shift
  done
}

function rootCheck() {
  if [ "$EUID" -ne 0 ];then
    fail "Please run as root"
  fi
}

parseArgs $*
$localCommand