mirror of
https://github.com/YunoHost-Apps/linuxdash_ynh.git
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88 lines
2.9 KiB
Bash
88 lines
2.9 KiB
Bash
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#!/bin/bash
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######
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# Credit: http://stackoverflow.com/questions/134906/how-do-i-list-all-cron-jobs-for-all-users#answer-137173
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######
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catCmd=`which cat`
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awkCmd=`which awk`
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sedCmd=`which sed`
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egrepCmd=`which egrep`
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echoCmd=`which echo`
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crontabCmd=`which crontab`
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# System-wide crontab file and cron job directory. Change these for your system.
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CRONTAB='/etc/crontab'
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CRONDIR='/etc/cron.d'
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# Single tab character. Annoyingly necessary.
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tab=$(echo -en "\t")
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# Given a stream of crontab lines, exclude non-cron job lines, replace
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# whitespace characters with a single space, and remove any spaces from the
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# beginning of each line.
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function clean_cron_lines() {
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while read line ; do
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$echoCmd "${line}" |
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$egrepCmd --invert-match '^($|\s*#|\s*[[:alnum:]_]+=)' |
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$sedCmd --regexp-extended "s/\s+/ /g" |
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$sedCmd --regexp-extended "s/^ //"
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done;
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}
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# Given a stream of cleaned crontab lines, $echoCmd any that don't include the
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# run-parts command, and for those that do, show each job file in the run-parts
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# directory as if it were scheduled explicitly.
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function lookup_run_parts() {
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while read line ; do
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match=$($echoCmd "${line}" | $egrepCmd -o 'run-parts (-{1,2}\S+ )*\S+')
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if [[ -z "${match}" ]] ; then
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$echoCmd "${line}"
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else
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cron_fields=$($echoCmd "${line}" | cut -f1-6 -d' ')
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cron_job_dir=$($echoCmd "${match}" | awk '{print $NF}')
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if [[ -d "${cron_job_dir}" ]] ; then
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for cron_job_file in "${cron_job_dir}"/* ; do # */ <not a comment>
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[[ -f "${cron_job_file}" ]] && $echoCmd "${cron_fields} ${cron_job_file}"
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done
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fi
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fi
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done;
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}
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# Temporary file for crontab lines.
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temp=$(mktemp) || exit 1
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# Add all of the jobs from the system-wide crontab file.
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$catCmd "${CRONTAB}" | clean_cron_lines | lookup_run_parts >"${temp}"
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# Add all of the jobs from the system-wide cron directory.
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$catCmd "${CRONDIR}"/* | clean_cron_lines >>"${temp}" # */ <not a comment>
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# Add each user's crontab (if it exists). Insert the user's name between the
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# five time fields and the command.
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while read user ; do
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$crontabCmd -l -u "${user}" 2>/dev/null |
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clean_cron_lines |
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$sedCmd --regexp-extended "s/^((\S+ +){5})(.+)$/\1${user} \3/" >>"${temp}"
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done < <(cut --fields=1 --delimiter=: /etc/passwd)
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# Output the collected crontab lines.
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## Changes: Parses output into JSON
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$catCmd "${temp}" \
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| awk 'BEGIN {print "["} \
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{print "{ \"min(s)\": \"" $1 \
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"\", \"hours(s)\": \"" $2 "\", " \
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" \"day(s)\": \"" $3 "\", " \
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" \"month\": \"" $4 "\", " \
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" \"weekday\": \"" $5 "\", " \
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" \"user\": \"" $6 "\", " \
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" \"command\": \"" $7$8$9$10 "\" " \
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"}," } \
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END {print "]"}' \
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| $sedCmd 'N;$s/,\n/\n/;P;D'
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rm --force "${temp}"
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