Lock pidfiles with fcntl and create them atomically.
authorBen Pfaff <blp@nicira.com>
Wed, 23 Jul 2008 20:07:02 +0000 (13:07 -0700)
committerBen Pfaff <blp@nicira.com>
Wed, 23 Jul 2008 20:12:23 +0000 (13:12 -0700)
This makes it possible to verify that the program that created the
pidfile is still running.


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