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Log user out of Ubuntu session when the sesion duration has been exceeded or total logon time for today has been exceeded.
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| #!/bin/bash | |
| function current_session_time() { | |
| # Get the duration of the current logon session in seconds | |
| username="$1" | |
| info=$(last -Fn1 $username) | |
| # Get the current time and the session time in seconds | |
| current_time=$(date +%s) | |
| session_time=$(date -d "$(echo $info | awk '{print $5, $6, $7, $8}')" +%s) | |
| # Calculate the difference between the current time and the session time | |
| difference=$((current_time - session_time)) | |
| } | |
| function get_time_previous_sessions() { | |
| # Get the total time of previous logon sessions in seconds. | |
| username="$1" | |
| info=$(last -F --since today $username) | |
| # Example output: | |
| # miguel tty3 tty3 Sun Jul 7 16:14:53 2024 still logged in | |
| # miguel tty3 tty3 Sun Jul 7 14:07:12 2024 - Sun Jul 7 15:03:10 2024 (00:55) | |
| # miguel tty3 tty3 Sun Jul 7 14:01:10 2024 - Sun Jul 7 14:06:59 2024 (00:05) | |
| # miguel tty3 tty3 Sun Jul 7 09:00:17 2024 - Sun Jul 7 14:00:59 2024 (05:00) | |
| # Get the time (xx:xx) from each of the following lines | |
| times=$(echo "$info" | grep -o '([0-9][0-9]:[0-9][0-9])') | |
| # Calculate the total time in seconds from the session durations | |
| for time in $times; do | |
| hours=$(echo $time | cut -d: -f1) | |
| minutes=$(echo $time | cut -d: -f2) | |
| total_time=$((total_time + ($hours * 3600) + ($minutes * 60))) | |
| done | |
| } |
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| #!/bin/bash | |
| function log_user_out() { | |
| # Notify the user that the session will be logged out | |
| username="$1" | |
| export DISPLAY=$username | |
| export XAUTHORITY=/home/$username/.Xauthority | |
| export XDG_RUNTIME_DIR=/run/user/$(id -u $username) | |
| /usr/bin/notify-send 'Je zit te lang op de computer.' | |
| sleep 3 | |
| # Users still have the option here to cancel the logout | |
| #gnome-session-quit --logout | |
| # Force user logout | |
| pkill -SIGKILL -u $(whoami) | |
| } |
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| #!/bin/bash | |
| # Log the user out if the current session duration has been exceeded. | |
| # Provide the full path to the functions file, otherwise cron will not find them | |
| source "$HOME"/cron_jobs/logout.sh | |
| source "$HOME"/cron_jobs/functions.sh | |
| #set -x | |
| duration_limit=1800 # 30 minutes | |
| current_session_time $(whoami) | |
| echo $(date -u) "Current session duration: $difference seconds" | |
| # Check if the session duration exceeds the limit | |
| if (($difference > $duration_limit)); then | |
| echo $(date -u) "Session duration exceeds the limit of 30 minutes" | |
| # Log the user out | |
| log_user_out $username | |
| fi |
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| #!/bin/bash | |
| # Log the user out if the total login time today has been exceeded. | |
| # Provide the full path to the functions file, otherwise cron will not find them | |
| source "$HOME"/cron_jobs/logout.sh | |
| source "$HOME"/cron_jobs/functions.sh | |
| #set -x | |
| username=$(whoami) | |
| total_time_allowed=3600 # One hour a day allowed | |
| current_session_time $username | |
| get_time_previous_sessions $username | |
| total_time=$((difference + total_time)) | |
| echo $(date -u) "Total time logged in today: $total_time seconds" | |
| # Check if the session duration exceeds the limit | |
| if (($total_time > $total_time_allowed)); then | |
| echo $(date -u) "User has been logged in for more than one hour today." | |
| # Log the user out | |
| log_user_out $username | |
| fi |
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