This creates a race condition. You must wrap it in some atomical locking mechanism. Between the time you check and the time you create, even if you ask sysopen for an exclusive create, several processes may think they possess the lock at the same time.

not a Good Thing™

-nuffin
zz zZ Z Z #!perl

In reply to Re: Re: Using flock() on files by nothingmuch
in thread Using flock() on files by SiMac

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