flufl.lock 2.2.1

The ``flufl.lock`` library provides an NFS-safe file-based locking algorithm influenced by the GNU/Linux `open(2)` manpage, under the description of the `O_EXCL` option::<br /><br /> [...] O_EXCL is broken on NFS file systems, programs which rely on it for performing locking tasks will contain a race condition. The solution for performing atomic file locking using a lockfile is to create a unique file on the same fs (e.g., incorporating hostname and pid), use link(2) to make a link to the lockfile. If link() returns 0, the lock is successful. Otherwise, use stat(2) on the unique file to check if its link count has increased to 2, in which case the lock<br />is also successful.

Requirements:	No special requirements
Platforms:	*nix, Linux
Keyword:	Check,  Count,  Create,  Excl,  Hostname,  Incorporating,  Increased,  Library,  Link,  Lockfile,  Locking,  Lockis,  Nfssafe,  Performing,  Returns,  Successful,  Unique
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