Check login in Xubuntu and send status in Telegram

README.md

Check Login in Xubuntu

Add premission to file:

chmod +x check-login.sh

Move file check-login.sh:

mv check-login /usr/local/bin/

Create cron in system:

nano /etc/crontab

Add in last line:

# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.

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

# Example of job definition:
# .---------------- minute (0 - 59)
# |  .------------- hour (0 - 23)
# |  |  .---------- day of month (1 - 31)
# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
# |  |  |  |  |
# *  *  *  *  * user-name command to be executed
17 *    * * *   root    cd / && run-parts --report /etc/cron.hourly
25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6    * * 7   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6    1 * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
#
# Check login
*/1 * * * *    root    /usr/local/bin/check-login.sh

check-login.sh

#! /bin/bash
# Francisco Chaves <https://franciscochaves.com.br>

# Alter Token and Chat id

BOT=login_pc_bot
TOKEN=YOUR_TOKEN
URL=https://api.telegram.org/bot${TOKEN}
CHAT_ID=YOUR_CHAT_ID
URL_SEND_MESSAGE=${URL}/sendMessage?chat_id=${CHAT_ID}
MESSAGE_HEADER="⚠️ Novo login ⚠️"
MESSAGE_BODY="{\"Machine\": \"${HOSTNAME}\", \"Uptime\": \"$(uptime)\", \"Users\": \"$(who)\"}"
TEMP_FILE="/tmp/login-pc-bot.txt"

SendMessage() {
  curl --data-urlencode "text=${MESSAGE_HEADER}" ${URL_SEND_MESSAGE}
  sleep 2
  curl --data-urlencode "text=${MESSAGE_BODY}" ${URL_SEND_MESSAGE}
}

CreateFileIfNotExist() {
  if [ ! -f $TEMP_FILE ]; then
    touch ${TEMP_FILE}
  fi
}

CheckLogin() {
  CreateFileIfNotExist

  LOG_LOGIN_NOW=$(cat /var/log/auth.log | grep "xfce4-screensaver-dialog: gkr-pam: unlocked login keyring" | tail -n 1)
  LOG_LOGIN_LAST=$(cat ${TEMP_FILE})

  if [ "${LOG_LOGIN_NOW}" != "${LOG_LOGIN_LAST}" ]; then
    SendMessage
    echo -e $LOG_LOGIN_NOW | tee $TEMP_FILE
  fi

  exit 1
}

CheckLogin