perl-LockFile-Simple
Simple file locking scheme
This simple locking scheme is not based on any file locking system calls such as 'flock()' or 'lockf()' but rather relies on basic file system primitives and properties, such as the atomicity of the 'write()' system call. It is not meant to be exempt from all race conditions, especially over NFS. The algorithm used is described below in the *ALGORITHM* section. It is possible to customize the locking operations to attempt locking once every 5 seconds for 30 times, or delete stale locks (files that are deemed too ancient) before attempting the locking.
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