Whoops, sorry. Of course I meant
sudo python -c "import os, fcntl; fd = os.open('/var/crash/.lock', os.O_WRONLY|os.O_CREAT|os.O_NOFOLLOW); fcntl.lockf(fd, fcntl.LOCK_EX | fcntl.LOCK_NB)"
Whoops, sorry. Of course I meant
sudo python -c "import os, fcntl; fd = os.open( '/var/crash/ .lock', os.O_WRONLY| os.O_CREAT| os.O_NOFOLLOW) ; fcntl.lockf(fd, fcntl.LOCK_EX | fcntl.LOCK_NB)"