Anons79 Mini Shell

#!/bin/bash
################################################
#  script for NC CXS scan logs monitoring      #
################################################

# Nagios exit codes: [0=OK] [WARNING=1] [CRITICAL=2] [UNKNOWN=3];

PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin

# Include ini files with configuration;
SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
source "${SCRIPT_DIR}/check-vps-cxs-log.ini"

verbose=0

PROGNAME=${0##*/}

IFS=','
read -a PATCHES_TO_BIN_ARR <<< "/usr/sbin/cxs"
read -a LOG_FILES_ARR <<< "scandaily.log,scanweekly.log"
read -a SEARCH_PATTERNS_ARR <<< "${SEARCH_PATTERNS}"
LOG_FILES_FOLDER="/var/log/cxsreports/"

print_usage() {
    echo ""
    echo "Usage: $PROGNAME [-v be Verbose] [-l Logfiles dir]"
    echo "Usage: $PROGNAME -h | --help"
}

print_help() {
        print_usage
        echo ""
        echo "This script checks logs of CXS scan with NC custom signatures (see TOP-64)"
        echo ""
        echo "-v be Verbose (should be last argument)"
        echo "-l Logfiles dir, string. Default - /var/log/cxsreports/"
        echo "--help Print this help screen"
        echo ""
        exit 3
}

while [ $# -gt 0 ]; do
        case "$1" in
        --help)
                print_help
                exit 3
                ;;

        -h)
                print_help
                exit 3
                ;;

        -l)
                LOG_FILES_FOLDER=$2; shift
                ;;

        -v)
                verbose=1; shift;shift
                ;;

        *)
                echo >&2 "Unknown argument: $1"
                print_usage
                exit 3
                ;;
        esac
        shift
done

if [ "${verbose}"  == 1 ]; then
echo "Patch to bin file: ${PATCHES_TO_BIN_ARR[@]}"
echo "Log files array: ${LOG_FILES_ARR[@]}"
echo -e "Search patterns: ${SEARCH_PATTERNS_ARR[@]}\n"
fi

# Array for output information;
declare -a echo_array

####### BIN FILES CHECK SECTION BEGIN ######
# Check if BIN file exists;
for element in "${PATCHES_TO_BIN_ARR[@]}";
do
  if [[ ! -f "${element}" ]]; then
    # If file doesn't exists, we add it to array;
    echo_array+=(${element})
  fi
done
# Output all not found bin files and UNKNOWN;
if [[ "${#echo_array[@]}" -gt 0 ]]; then
  echo "UNKNOWN. Bin file(s) not found. Path to file(s) = ${echo_array[*]}"
  exit 3
fi
####### BIN FILES CHECK SECTION END ######

####### LOG FILES CHECK SECTION BEGIN ######
# Check if log file exists;
for file in "${LOG_FILES_ARR[@]}";
do
  if [[ ! -f "${LOG_FILES_FOLDER}${file}" ]]; then
    # If file doesn't exists, we add it to array;
    echo_array+=(${LOG_FILES_FOLDER}${file})
  fi
done
# Output all not found files and WARNING;
if [[ "${#echo_array[@]}" -gt 0 ]]; then
  echo "WARNING. Log file(s) not found. Path to file(s) = ${echo_array[*]}"
  exit 1
fi
####### LOG FILES CHECK SECTION END ######

####### CHECK DATE OF LOG FILE begin ######
DAYS_THRESHOLD=0
for log_file_name in "${LOG_FILES_ARR[@]}"; do
  if [[ "${log_file_name}" == "scandaily.log" ]]; then
    DAYS_THRESHOLD=1
  elif [[ "${log_file_name}" == "scanweekly.log" ]]; then
    DAYS_THRESHOLD=7
  fi
  FIND_OUT=$(find "${LOG_FILES_FOLDER}" -iname "${log_file_name}" -mtime -"${DAYS_THRESHOLD}" 2>/dev/null)
  if [ -z "${FIND_OUT}" ]; then
    echo_array+=(${log_file_name})
  fi
done
# Output all not found bin files and UNKNOWN;
if [[ "${#echo_array[@]}" -gt 0 ]]; then
  echo "WARNING. Log file(s) is old. File(s) = ${echo_array[*]}"
  exit 1
fi
####### CHECK DATE OF LOG FILE end   ######

####### CHECK LOG FILE FORMAT,PATTERN BEGIN ######
for file in "${LOG_FILES_ARR[@]}"; do
  CHECK_PATTERN=$(grep "\- SCAN REPORT \-" "${LOG_FILES_FOLDER}${file}")
  if [ -z "${CHECK_PATTERN}" ]; then
    echo "WARNING. Log file(s) have invalid structure. File(s) = ${file}"
    exit 1
  fi
  for pattern in "${SEARCH_PATTERNS_ARR[@]}"; do
    INFECTED=$(grep "${pattern}" "${LOG_FILES_FOLDER}${file}" | tr -s '\n' ' ')
    if [ -n "${INFECTED}" ]; then
      echo_array+=("${file}:${INFECTED}")
    fi
  done
done
# Output all not found bin files and UNKNOWN;
if [[ "${#echo_array[@]}" -gt 0 ]]; then
  echo "CRITICAL. Viruses were found ${echo_array[*]}"
  exit 2
fi
####### CHECK LOG FILE FORMAT,PATTERN END ########

echo "OK. There are no infected files."
exit 0