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#!/bin/bash
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# $Id$
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function usage {
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  echo "Usage :" 1>&2
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  echo "$0 [OPTIONS]" 1>&2
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  echo " -h display this message" 1>&2
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  echo " -i interactive mode" 1>&2
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  echo " -T Specify the TID" 1>&2
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}
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function nointeractive {
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if [ "$TID2DEL" == "" ]
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then
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   echo "Please specify a TID ISCSI" 1>&2
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   exit 1
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fi
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TARGET=$(cat /proc/net/iet/session |grep -i tid:$TID2DEL |cut -d ":" -f3)
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TID_FIND=1
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TID_ISACTIVE=1
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for line in $(cat /proc/net/iet/session)
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do
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  if [ $TID_FIND -eq 0 ]
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  then
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     CHECK_STATE=$(echo $line |awk '{ if ( /state:active/ ){ print 0 }else{ print $1 $line} }')
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     if [ "$CHECK_STATE" = "0" ]
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     then
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         TID_ISACTIVE=0
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     fi
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  fi
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  if [ $TID_ISACTIVE -eq 0 ]
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  then
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     echo "iscsi volume in use, please disconnect all clients " 1>&2
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     exit 1
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  fi
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  TID_LISTED=$(echo $line |awk '(/tid:/) { print $1 }')
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  if [ "$TID_LISTED" != "" ]
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  then
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     if [ "tid:$TID2DEL" = "$TID_LISTED" ]
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     then
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        TID_FIND=0
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     else
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       TID_FIND=1
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     fi
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 fi
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done
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ietadm --op delete --tid=$TID2DEL
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if [ $? -eq 0 ]
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then
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   echo "*** La suppression via la commande ietadm s'est termine correctement"
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   echo ""
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   echo "*** Vérification et suppression du volume dans le fichier /etc/iet/ietd.conf ..."
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   COPY_LINE=0
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   >/tmp/.buffer_ietd.conf
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   while read line
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   do
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      echo $line |grep -i "^Target"
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      if [ $? -eq 0 ]
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      then
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         COPY_LINE=0
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      fi
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      echo $line |grep -i "^Target $TARGET"
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      if [ $? -eq 0 ]
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      then
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         COPY_LINE=1
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      fi
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      if [ $COPY_LINE -eq 0 ]
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      then
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         echo $line >> /tmp/.buffer_ietd.conf
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      fi
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    done < "/etc/iet/ietd.conf"
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    echo "*** Sauvegarde du fichier /etc/iet/ietd.conf ..."
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    TODAY=$(date +%Y%m%d%H%M%S)
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    cp /etc/iet/ietd.conf /etc/iet/ietd.conf.$TODAY
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    cp /tmp/.buffer_ietd.conf /etc/iet/ietd.conf
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   echo ""
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   echo "*** Vérification /proc/net/iet/volume :"
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   cat /proc/net/iet/volume
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   echo ""
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   echo "*** Verification repertoire /etc/iet :"
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   ls -ltr /etc/iet
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   echo ""
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   echo "*** Operation de suppression [OK] ..."
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else
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   echo "*** Un probleme est survenu lors de la tentive de suppresion du volume iscsi TID:$TID2DEL"
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   echo "*** Veuillez vérifier que le volume n'est pas en cours d'uilisation (cat /proc/net/iet/session) sinon contacter l'admin en charge de ce serv ce"
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fi
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}
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function interactive {
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echo "*** Choix du volume ISCSI a supprimer ***"
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cat /proc/net/iet/session
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echo "*** Saisir le TID du volume iscsi a supprimer : ***"
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while read inputline
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do
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   TID2DEL=$inputline
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   echo "*** Etes-vous sur du nom : $inputline ? (y/n) ***"
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   while read inputConfirm
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   do
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      if [ "$inputConfirm" = "y" ]||[ "$inputConfirm" = "n" ]
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      then
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         break
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      fi
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      echo "*** Etes-vous certain de vouloir supprimer le TID : $inputline ? (y/n) ***"
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   done
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   if [ "$inputConfirm" = "y" ]
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   then
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      break
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   fi
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   if [ "$inputConfirm" != "y" ]
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   then
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      echo "*** Saisir le TID du volume iscsi a supprimer : ***"
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   fi
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done
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echo "**** Recuperation de la propriété Target (identifiant utilise dans le fichier /etc/iet/ietd.conf) ..."
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TARGET=$(cat /proc/net/iet/session |grep -i tid:$TID2DEL |cut -d ":" -f3)
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echo "Nom de la target a rechercher dans /etc/iet/ietd.conf : $TARGET"
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echo ""
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echo "**** Check si le volume est en cours d'utilisation ..."
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TID_FIND=1
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TID_ISACTIVE=1
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for line in $(cat /proc/net/iet/session)
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do
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  if [ $TID_FIND -eq 0 ]
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  then
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     CHECK_STATE=$(echo $line |awk '{ if ( /state:active/ ){ print 0 }else{ print $1 $line} }')
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     if [ "$CHECK_STATE" = "0" ]
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     then
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         TID_ISACTIVE=0
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     fi
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  fi
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  if [ $TID_ISACTIVE -eq 0 ]
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  then
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     echo "Le volume isci est en cours d'utilisation, suppression impossible"
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     exit 1
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  fi
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  TID_LISTED=$(echo $line |awk '(/tid:/) { print $1 }')
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  if [ "$TID_LISTED" != "" ]
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  then
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     if [ "tid:$TID2DEL" = "$TID_LISTED" ]
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     then
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        TID_FIND=0
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     else
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       TID_FIND=1
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     fi
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 fi
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done
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echo "*** Debut de la procédure de suppression ..."
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echo ""
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ietadm --op delete --tid=$TID2DEL
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if [ $? -eq 0 ]
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then
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   echo "*** La suppression via la commande ietadm s'est termine correctement"
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   echo ""
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   echo "*** Vérification et suppression du volume dans le fichier /etc/iet/ietd.conf ..."
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   COPY_LINE=0
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   >/tmp/.buffer_ietd.conf
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   while read line
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   do
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      echo $line |grep -i "^Target"
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      if [ $? -eq 0 ]
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      then
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         COPY_LINE=0
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      fi
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      echo $line |grep -i "^Target $TARGET"
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      if [ $? -eq 0 ]
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      then
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         COPY_LINE=1
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      fi
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      if [ $COPY_LINE -eq 0 ]
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      then
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         echo $line >> /tmp/.buffer_ietd.conf
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      fi
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    done < "/etc/iet/ietd.conf"
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    echo "*** Sauvegarde du fichier /etc/iet/ietd.conf ..."
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    TODAY=$(date +%Y%m%d%H%M%S)
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    cp /etc/iet/ietd.conf /etc/iet/ietd.conf.$TODAY
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    cp /tmp/.buffer_ietd.conf /etc/iet/ietd.conf
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   echo ""
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   echo "*** Vérification /proc/net/iet/volume :"
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   cat /proc/net/iet/volume
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   echo ""
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   echo "*** Verification repertoire /etc/iet :"
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   ls -ltr /etc/iet
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   echo ""
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   echo "*** Operation de suppression [OK] ..."
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else
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   echo "*** Un probleme est survenu lors de la tentive de suppresion du volume iscsi TID:$TID2DEL"
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   echo "*** Veuillez vérifier que le volume n'est pas en cours d'uilisation (cat /proc/net/iet/session) sinon contacter l'admin en charge de ce service"
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fi
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echo "*** FIN ***"
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}
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while getopts "iT:h" OPTION
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do
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     case $OPTION in
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         h)
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             usage
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             exit 1
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             ;;
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         i)
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             interactive
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             ;;
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         T)
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             TID2DEL=$OPTARG
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             ;;
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         *)
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             usage
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             exit 1
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             ;;
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     esac
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done
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if [ ! -d "/proc/net/iet" ]
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then
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  echo "Please, check if ietd is running ..." 1>&2
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  exit 1
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fi
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if [ -z $TID2DEL ]
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then
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   usage
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   exit 1
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fi
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nointeractive