set timeout 60

spawn socat unix-connect:vm/console -
send "\r\n"
expect "#"
set FINISHED 0
set EXIT "1" 
while { $FINISHED < 10 } {
  send "ip address show dev ppp0 | grep ppp0\r\n"
  expect {
    "192.168.100.1" { set FINISHED 20; set EXIT 0; }
    "can't find device" { send_user "waiting ..." ; send "\r\n"; sleep 3 }
    "DOWN" { send_user "waiting ..." ; send "\r\n"; sleep 3 }
  }
  set FINISHED [ expr $FINISHED + 1 ]
}

exit $EXIT