Datorlaika ierobežošana

1. Izveido /home/bin failu ar sekojošu saturu:

   #!/bin/bash
   # warning shown to user
   warning="Tavs datorlaiks beigsies pēc 1 minūtes!"
   # Ja pēc tam nerādās pieteikšanās logs, spied: \
   # Ctrl+Alt+F7 vai F8, F9, utt."
   # depending on crontab, set amount of time which should be added
   addtime=2
   
   # Get user, who runs xwindow session (assuming only one simultaneous X window user)
   who=$(who|grep -E "tty([7-9]|1[0-2])"|head -n1) # user info
   user=$(echo $who|cut -d" " -f1)   # current user
   if [ -z "$user" ];then
       user="nobody"
   fi
   #user="ada" # for testing only !!
   #term=$(echo $who|cut -d"(" -f2|cut -d")" -f1) # current terminal
   term=$(echo $who|awk '{print $2}') # current terminal
   cdate=$(date +"%F")
   # time for user logged in before
   daytime=$(grep -aE "^$cdate.*user:$user.*daytime:[0-9]+$" /var/log/timeout.log|tail -n1|awk -F "daytime:" '{print $2}'|awk '{print $1}')
   
   # Calculate total daytime
   daytime=$(expr $daytime + $addtime)
   
   check=true
   daylimit=120
   if [ "$(echo $user|grep -E 'nobody|ieva|odo|valdis')" != "" ]; then
       check=false
   fi
   
   if [ "$(echo $user|grep -E 'ubuntu')" != "" ]; then
       daylimit=1
   fi
   
   message="$(date +'%F %T') user:$user term:$term daytime:$daytime"
   # for debbuging purposes only:
   #echo addtime:$addtime
   #echo who:$who
   #echo user:$user
   #echo term:$term
   #echo cdate:$cdate
   #echo daytime: $daytime
   #echo check: $check
   #echo $message
   #exit 0
   
   if [ $check == true ]; then
   if [ $daytime -gt $daylimit ]; then
   message="$message, Limit exceeded"
   #export DISPLAY=$term
   export DISPLAY=:0.0 # assuming only one Xterm session
   #su - $user -c "/usr/bin/xmessage -display :0.0 -center \"$warning\" &" # old school, doesnt support UTF8
   su -c "zenity --warning --text=\"$warning\"" $user 2>/dev/null & # dialog window
   #su $user -l -c "notify-send -u critical \"$warning\" &" # notification
   sleep 60
   # check if banned user session is still active
   user1=$(who|grep -E "tty([7-9]|1[0-2])"|head -n1|cut -d" " -f1)
   # and kill it, if necessary
   if [ "$user1" == "$user" ]; then
   #/etc/init.d/gdm restart # doesn't work
   /sbin/restart lightdm  # get off user from session by restarting xwindow manager
   /etc/init.d/lightdm restart # get off user from session by restarting xwindow manager
   message="$message, logged off"
   fi
   fi
   fi
   
   # Log
   echo $message >> /var/log/timeout.log
   exit 0

2. Padara failu izpildāmu ar komandu:

   sudo chmod +x /home/bin/check-timeout
3. Pēc vajadzības izmaina lietotāju vārdus un citus parametrus skriptā.

4. Pievieno crontab uzdevumu:

   sudo crontab -e

5. Redaktorā pievieno sekojošu rindu:

   */2 * * * * /home/bin/check-timeout

6. Skripta darbību var pārbaudīt, skatot žurnāla failu /var/log/timeout.log:

   ...
   2013-06-01 20:04:01 user:audris term::0 daytime:88
   2013-06-01 20:06:01 user:audris term::0 daytime:90
   2013-06-01 20:08:01 user:audris term::0 daytime:92, Limit exceeded, logged off
   2013-06-01 20:10:01 user:nobody term: daytime:40
   2013-06-01 20:12:01 user:karlis term::0 daytime:42
   2013-06-01 20:14:01 user:karlis term::0 daytime:44
   2013-06-01 20:16:01 user:karlis term::0 daytime:46
   
   ...

Alternatīvas

Ja darbojas (jo šīs lapas rediģēšanas laikā nestrādāja neviens), tad varētu izmantot:

• Timeoutd
• Timekepr
• Nanny

Skatīt arī

• Dansguardian satura filtrētājs