XPost: alt.privacy.anon-server, sci.crypt   
   From: virebent@tcpreset.invalid   
      
   A dual approach (file creation + flock) provides the strongest possible   
   locking mechanism and should completely eliminate the concurrent execution   
   issue.   
   The system-level flock is particularly powerful because it's enforced by the   
   operating system kernel, not just by convention among processes.   
      
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