OpenFromLock

Opens a file you have a Lock on (V36)

Given a Lock, this function performs an open on that Lock. If the open succeeds, the Lock is (effectively) relinquished, and should not be UnLock()ed or used. If the open fails, the Lock is still usable. The Lock associated with the file internally is of the same access mode as the Lock you gave up - shared is similar to MODE_OLDFILE, exclusive is similar to MODE_NEWFILE.

lock

Lock on object to be opened. This should be a file or a hard link to a file.

fh

Newly opened FileHandle or NULL for failure

In the original V36 documentation, this was shown (incorrectly) as taking a Mode parameter as well. The prototypes and pragmas were also wrong.

Open(), Close(), Lock(), UnLock()