Watch download directory and scan downloaded files with ClamAV

virus-scan.sh

#!/bin/bash
#
# Watch download directory and scan downloaded files with ClamAV
#
# Check if works by downloading:
# https://secure.eicar.org/eicar_com.zip
#
# Original script by Fitzcarraldo
# https://fitzcarraldoblog.wordpress.com/2016/02/20/\
# automatically-detecting-files-placed-in-my-downloads-directory-in-\
# gentoo-linux-and-scanning-them-for-viruses/

DIR="${HOME}/Downloads"
LOG="${HOME}/.my-virus-scan.log"

while read -r file; do
  # Have to check file length is nonzero otherwise commands may be repeated
  if [[ -s "${file}" ]]; then
    date > "${LOG}"
    clamscan --quiet -l "${LOG}" "${file}"
    # Display notification only if virus found or error occurred
    if [[ $? -ne 0 ]]; then
      zenity --warning --title "Virus scan of ${file##*/}" \
      --text "$(cat "${LOG}")" 2>/dev/null
    fi
  fi
done < <(inotifywait -q -m -e close_write,moved_to --format '%w%f' "${DIR}")