Re: filexfer-07

[Bill Sommerfeld <sommerfeld%sun.com@localhost>]

On Mon, 2005-04-04 at 18:39, Jeffrey Hutzelman wrote:

> On most Unix systems, an SFTP server can guarantee to its client that I 
> can't get a lock on a file, but it can't guarantee that I won't just write 
> to the file without bothering to get a lock.

unix systems which implement mandatory file locking (typically
SVR4-derived) typically do so on a file-by-file basis -- one particular
combination of file mode bits was recast to mean that  normally-advisory
byte-range locks become mandatory, blocking attempts to do I/O in
conflict with the lock.  this prevents you from mixing advisory and
mandatory locks on the same file.

							- Bill