Added logwatch.sh

README.md

@@ -26,4 +26,15 @@ Run this as a cronjob. It will send you no more than one Telegram per day if the
 Example crontab entry to check for updates every 4 hours:
 ````
 00 */4  * * *   root    bash /root/scripts/nextcloud-telegram-notify/checkupdates.sh
+````
+
+## logwatch.sh
+
+![screenshot](images/logwatch.png)
+
+Run this as a cronjob. It will send you a Telegram every time the log file receives an update, but only at the log level you preselect.
+
+Example crontab entry to check for updates every 15 minutes:
+````
+*/15 *  * * *   root    bash /root/scripts/nextcloud-telegram-notify/logwatch.sh
 ````

logwatch.sh

@@ -0,0 +1,91 @@
+#!/bin/bash
+
+tgapi=""
+tgch=""
+
+nextcloudpath="/var/www/html"
+wwwuser="www-data"
+logmax="250"
+logprefix="logwatch"
+
+## Level 0 = DEBUG
+## Level 1 = INFO
+## Level 2 = WARNING
+## Level 3 = ERROR
+## Level 4 = FATAL
+## Will send everything from selected log level and up.
+loglevel=3
+
+errorstring=('"level":0,' '"level":1,' '"level":2,' '"level":3,' '"level":4,')
+errorname=('DEBUG' 'INFO' 'WARNING' 'ERROR' 'FATAL')
+
+function sendtelegram {
+  echo "Nextcloud has new log entries..." > /tmp/nclogentryheader.txt
+  echo "Server: $(hostname)" >> /tmp/nclogentryheader.txt
+  echo "Path: $nextcloudpath" >> /tmp/nclogentryheader.txt
+  echo "Date: $(date)" >> /tmp/nclogentryheader.txt
+  echo "" >> /tmp/nclogentryheader.txt
+  string=$(cat /tmp/nclogentryheader.txt /tmp/nclogentry.txt)
+  wget -qO- "https://api.telegram.org/bot$tgapi/sendMessage?chat_id=$tgch&text=$string" &> /dev/null
+  errorcode=$?
+  updatelog $errorcode
+}
+
+function updatelog {
+  logdata="Telegram Sent"
+  if [[ ! -z $1 ]]; then
+    if [[ $1 == "0" ]]; then
+      logerror="Successful!"
+    else
+      logerror="Sending Failed: Exit Code $1"
+    fi
+  fi
+  echo "$(date +%y%m%d).$(date +%H%M) - $logprefix - $logdata - $logerror" >> /var/log/nextcloud-telegram-notify.log
+  logsize=$(cat /var/log/nextcloud-telegram-notify.log | wc -l)
+  if [[ $logsize -gt $logmax ]]; then
+    mv /var/log/nextcloud-telegram-notify.log /tmp/nextcloud-telegram-notify.log
+    tail -n $logmax /tmp/nextcloud-telegram-notify.log > /var/log/nextcloud-telegram-notify.log
+    rm /tmp/nextcloud-telegram-notify.log
+  fi
+}
+
+sudo -u $wwwuser php "$nextcloudpath/occ" user:list > /tmp/ncchecknewusers.txt
+
+array=($(cat $nextcloudpath/config/config.php | grep 'datadirectory'))
+nextcloudfilespath=${array[2]:1:-2}
+cp $nextcloudfilespath/nextcloud.log /tmp/nclog.tmp
+
+if [[ -f /tmp/nclog.old ]]; then
+  rm -f /tmp/nclog.changes.tmp
+  for ((lvl=4; lvl>$((loglevel-1)); lvl--)); do
+    cat /tmp/nclog.old /tmp/nclog.old /tmp/nclog.tmp | grep "${errorstring[$lvl]}" | sort | uniq -u >> /tmp/nclog.changes.tmp
+  done
+  rm -f /tmp/nclog.new.*.tmp
+  size=$(cat /tmp/nclog.changes.tmp | wc -l)
+  if [[ $size -gt 0 ]]; then
+    n=0
+    while read -r entry; do
+      echo "$n" "/tmp/nclog.new.$n.tmp"
+      echo $entry > "/tmp/nclog.new.$((n++)).tmp"
+    done < /tmp/nclog.changes.tmp
+    rm -f /tmp/nclogentry.txt
+    for ((c=0; c<$n; c++)); do
+      log_level=$(cat "/tmp/nclog.new.$c.tmp" | jq -r .level)
+      echo "Log Entry: ${errorname[$log_level]}" >> /tmp/nclogentry.txt
+      echo "Time: $(cat "/tmp/nclog.new.$c.tmp" | jq -r .time)" >> /tmp/nclogentry.txt
+      echo "ReqID: $(cat "/tmp/nclog.new.$c.tmp" | jq -r .reqId)" >> /tmp/nclogentry.txt
+      echo "Remote Address: $(cat "/tmp/nclog.new.$c.tmp" | jq -r .remoteAddr)" >> /tmp/nclogentry.txt
+      echo "Username:  $(cat "/tmp/nclog.new.$c.tmp" | jq -r .user)" >> /tmp/nclogentry.txt
+      echo "App: $(cat "/tmp/nclog.new.$c.tmp" | jq -r .app)" >> /tmp/nclogentry.txt
+      echo "Message: $(cat "/tmp/nclog.new.$c.tmp" | jq -r .message)" >> /tmp/nclogentry.txt
+      echo "" >> /tmp/nclogentry.txt
+    done
+    sendtelegram
+  else
+    echo "There are no log entries to send..."
+  fi
+else
+  echo "First run... saving current log..."
+fi
+
+mv /tmp/nclog.tmp /tmp/nclog.old