set timeout 60 spawn socat unix-connect:foo.sock - send "\r\n" expect "login:" { send "root\r\n" } expect "/ #" set FINISHED 0 set EXIT "1" while { $FINISHED < 5 } { send "ip address show dev ppp0 | grep ppp0\r\n" expect { "192.168.100.1" { set FINISHED 10; set EXIT 0; } "can't find device" { send_user "waiting ..." ; send "\r\n"; sleep 3 } } set FINISHED [ expr $FINISHED + 1 ] } exit $EXIT