05-23-2014
Polling the folder and hoping that everything is done is asking for trouble. If you actually care about not copying over a half-written file, you need an atomic step.
First of all, the directory that you monitor and the directory which is the landing place for the transfers should not be the same. Secondly, they should lie on the same filesystem. Thridly, when a file arrives on the monitored directory (given the conditions above, it would be a POSIX atomic rename(2) operation), that file is always complete and any counts can be considred completed.
Regards,
Alister
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