====== SCRIPT: list  ALL cron on Debian ======
 
====== all_ban.sh ======


  #!/bin/bash
  # System-wide crontab file and cron job directory. Change these for your system.
  CRONTAB='/etc/crontab'
  CRONDIR='/etc/cron.d'
  # Single tab character. Annoyingly necessary.
  tab=$(echo -en "\t")
  # Given a stream of crontab lines, exclude non-cron job lines, replace
  # whitespace characters with a single space, and remove any spaces from the
  # beginning of each line.
  function clean_cron_lines() {
    while read line ; do
        echo "${line}" |
            egrep --invert-match '^($|\s*#|\s*[[:alnum:]_]+=)' |
            sed --regexp-extended "s/\s+/ /g" |
            sed --regexp-extended "s/^ //"
    done;
  }
  # Given a stream of cleaned crontab lines, echo any that don't include the
  # run-parts command, and for those that do, show each job file in the run-parts
  # directory as if it were scheduled explicitly.
  function lookup_run_parts() {
    while read line ; do
        match=$(echo "${line}" | egrep -o 'run-parts (-{1,2}\S+ )*\S+')
        if [[ -z "${match}" ]] ; then
            echo "${line}"
        else
            cron_fields=$(echo "${line}" | cut -f1-6 -d' ')
            cron_job_dir=$(echo  "${match}" | awk '{print $NF}')
            if [[ -d "${cron_job_dir}" ]] ; then
                for cron_job_file in "${cron_job_dir}"/* ; do  # */ <not a comment>
                    [[ -f "${cron_job_file}" ]] && echo "${cron_fields} ${cron_job_file}"
                done
            fi
        fi
    done;
  }
  # Temporary file for crontab lines.
  temp=$(mktemp) || exit 1
  # Add all of the jobs from the system-wide crontab file.
  cat "${CRONTAB}" | clean_cron_lines | lookup_run_parts >"${temp}" 
  # Add all of the jobs from the system-wide cron directory.
  cat "${CRONDIR}"/* | clean_cron_lines >>"${temp}"  # */ <not a comment>
  # Add each user's crontab (if it exists). Insert the user's name between the
  # five time fields and the command.
  while read user ; do
    crontab -l -u "${user}" 2>/dev/null |
        clean_cron_lines |
        sed --regexp-extended "s/^((\S+ +){5})(.+)$/\1${user} \3/" >>"${temp}"
  done < <(cut --fields=1 --delimiter=: /etc/passwd)
  # Output the collected crontab lines. Replace the single spaces between the
  # fields with tab characters, sort the lines by hour and minute, insert the
  # header line, and format the results as a table.
  cat "${temp}" |
    sed --regexp-extended "s/^(\S+) +(\S+) +(\S+) +(\S+) +(\S+) +(\S+) +(.*)$/\1\t\2\t\3\t\4\t\5\t\6\t\7/" |
    sort --numeric-sort --field-separator="${tab}" --key=2,1 |
    sed "1i\mi\th\td\tm\tw\tuser\tcommand" |
    column -s"${tab}" -t
  rm --force "${temp}" 

 
{{tag>tips cron script}}