script 1

root@timekeeper:~# cat arec.sh
#!/bin/sh
while [ 1==1 ] ; do
    ping=0
    for n in `awk '/nameserver/{print $2}' /etc/resolv.conf | xargs` ; do
        if ping -c 1 $n > /dev/null ; then
            ping=1
        fi
    done
    if ! [ $ping == "1" ] ; then
        logger ADSL connection restarted
        /etc/init.d/dial start
        #killall pppd
        #ifconfig nas0 0
        #killall br2684ctl
        #/etc/init.d/dial start
    fi
    sleep 60
done
root@timekeeper:~#


script 2

root@timekeeper:~# cat autorecon.sh
#!/bin/bash

SLEEP=60
GATEWAY=$(ip addr show dev ppp0 | \
          sed -n 3p | \
          awk '{ print $4 }' | \
          sed -e 's:/[0-9]*::' \
)

#TIMER=/var/run/autorecon.timer
TIMER=/tmp/autorecon.timer # for non-root tests
PASS=0

do_dnsstuff()
{
# Whatever ;)
echo "DNS stuff..."
}

do_pass()
{
  ((PASS++))
  echo $(($(date +%s)+($SLEEP*2+5))) > $TIMER
  echo $PASS >> $TIMER
  take_action
}

take_action()
{
# Here are the reconnect attemps number and actions to take.
  case $PASS in
    2|4|5|6) echo /etc/init.d/dial restart;;
    3) echo /etc/init.d/natfire restart;;
    7) echo reboot;;
  esac
  exit -$PASS
}

if [ -e $TIMER ]; then
  if [ $(date +%s) -lt $(sed -n "1p" $TIMER) ]; then
    PASS=$(sed -n "2p" $TIMER)
    rm $TIMER
  else
    rm $TIMER
  fi
fi

# See if the ATM bridge or pppd died.
if [ -z $(pidof pppd) ] || [ -z $(pidof br2684ctl) ]; then
  echo "pppd or ATM bridge died."
  do_pass
fi

# See if ppp0 exist in the links.
if [ -z $GATEWAY ]; then
  echo "ppp0 does not exist."
  do_pass
fi

# If ping fails, take actions.
ping -c 3 $GATEWAY > /dev/null || do_pass
echo "Ping OK"

# If DNS fails, take actions for DNS.
host google.com > /dev/null || do_dnsstuff
echo "DNS OK"

exit 0
root@timekeeper:~#



script 3


root@timekeeper:~# cat check_host.sh
#!/bin/sh
# check_host.sh

# SETEAZA variabilele de mai jos
##################################################

# fis. in care vor fi logate intreruperile
LOG_FILE=/var/log/check_host
# daca exista fis. $LOCK_FILE o alta instanta a scriptului inca ruleaza
LOCK_FILE=/tmp/check_host.sh.lock
# daca exista fis. $TAG_FILE inseamna ca si testul anterior a esuat sa
# stabileasca conexiunea
TAG_FILE=/tmp/chech_host.sh.tag
# hostul fol. pentru verificarea conexiunii; poate fi gateway-ul, de ex.
HOST=www.yahoo.com
# numele fis. care contine setarile pentru conexiunea ADSL
# acest fis. se afla deobicei in dir. /etc/ppp/peers/
CONEXIUNE=speedtch

if ! ping -c 3 $HOST &>/dev/null && ! test -f $LOCK_FILE ; then
  touch $LOCK_FILE

  # aici incercam sa restabilim conexiunea
  killall -9 pppd
  sleep 35
  pppd call $CONEXIUNE

  ping -c 3 $HOST &>/dev/null
  TEST=$?

  if [ $TEST -eq 0 ]; then
    if [ ! -f $TAG_FILE ]; then
      echo "SINGLE >" `date`>>$LOG_FILE
    else
      echo "END >" `date`>>$LOG_FILE
      rm -f $TAG_FILE
    fi
  else
    if [ ! -f $TAG_FILE ]; then
      echo "BEGINING >" `date`>>$LOG_FILE
      touch $TAG_FILE
    fi
  fi

  rm -f $LOCK_FILE
fi

root@timekeeper:~#



script 4


root@timekeeper:~# cat try.sh
#!/bin/sh
if ! ping -c 1 -n 193.231.100.2 > /dev/null ; then /etc/init.d/dial start ; logger ADSL connection restarted ; fi

root@timekeeper:~#