lockfile type locks

[Peter da Silva]

In practice, storing a PID in the file and doing a kill() on it may give
false positives, but they're usually harmless. It will never give a false
negative (well, except over a network... in which case kernel locking is
likely a lost cause as well).

The problem with kernel locking is all the incompatible "standards".
-- 
Peter da Silva.   `-_-'
+1 713 274 5180.
<peter at ficc.ferranti.com>