Topic: Need help! Ubuntu 11.04 wireless problems (Read 2374 times)

ping_pause=$((5*60))

ping_pause=5*60

#!/bin/bash

########################################################################
#
#   we need to be able to restart the network-manager to reconnect
#   automatically.  this usually requires us to type our password, but
#   since we want to be able to run this unattended, we need to tell
#   sudo that we can restart network-manager without typing our password
#   to set that up, run these two commands in a terminal while logged in
#   as your regular user:
#
#     echo "$(whoami) ALL=(ALL) NOPASSWD: /etc/init.d/network-manager" | sudo tee /etc/sudoers.d/network-manager
#     sudo chmod 0440 /etc/sudoers.d/network-manager
#   
########################################################################

ping_pause=10                   # how long, in seconds, to wait between ping attempts
restart_pause=60                # how long, in seconds, to wait after restarting networking

########################################################################

log() {
    echo "$(date) $@"
}

restart-network() {
    log "restarting networking"
    sudo /etc/init.d/network-manager restart > /dev/null
    # give it a minute to reconnect before we start checking again
    log "waiting $restart_pause seconds"
    sleep $restart_pause
}
   
# find the address of our router
log "finding router address"
while true
do
    router=$(route | grep ^default | awk '{print $2}')

    if [[ -z $router ]]
    then
        log "can't determine router"
        restart-network
    else
        break
    fi
done
log "router address '$router'"

# ping it repeatedly
while true
do
    log "pinging router '$router'"
    if ! ping -c 1 $router > /dev/null
    then
        log "ping failed"
        restart-network
    fi
    sleep $ping_pause
done

#!/bin/bash

########################################################################
#
#   we need to be able to restart the network-manager to reconnect
#   automatically.  this usually requires us to type our password, but
#   since we want to be able to run this unattended, we need to tell
#   sudo that we can restart network-manager without typing our password
#   to set that up, run these two commands in a terminal while logged in
#   as your regular user:
#
#     echo "$(whoami) ALL=(ALL) NOPASSWD: /etc/init.d/network-manager" | sudo tee /etc/sudoers.d/network-manager
#     sudo chmod 0440 /etc/sudoers.d/network-manager
#   
########################################################################

# how long, in seconds, to wait between ping attempts
pause=10

########################################################################

# find the address of our router
router=$(route | grep ^default | awk '{print $2}')

if [[ -z $router ]]
then
    echo "can't determine router - is network down already?"
    exit 1
fi

while true
do
    echo "$(date) pinging router '$router'"
    if ! ping -c 1 $router > /dev/null
    then
echo "$(date) ping failed; restarting network-manager"
sudo /etc/init.d/network-manager restart

        # give it a minute to reconnect before we start checking again
sleep 60
    fi
    sleep $pause
done

/path/to/script/scriptname &