Re: Re: Mandatory File Locking in PHP?

So, as of now, do we restrict PHP script to use only advisory file locking? Thanks, Ananth. >>> George Schlossnagle <george@omniti.com> 01/30/03 06:54AM >>> On Wednesday, January 29, 2003, at 07:11 PM, Marcus Börger wrote: > >> The real question is why you need mandatory locks and not advisory >> locks. If everyone is playing on the same team, advisory locks >> should provide all the semantics you need (and are very portable). >> Mandatory locks (on linux at least) require not only special mount >> options, but special perms to the file (g-x, g+s, I believe). That >> seems like a lot to require inside an extension. > > The dba solution so far is based on flock() and where not appropriate > use fctnl(). > I tried to have the lock stuff working on as many systems as possible. Right. Both of these are pretty portable, one being present on all BSD-style systems and the other on POSIX systems. They are also advisory locks. Mandatory locks actually prevent read and write calls from _anyone_ else succeeding on that file. On linux, mandatory locks are set with fcntl, but it's not part of the standard POSIX standard. -- PHP Development Mailing List <http://www.php.net/> To unsubscribe, visit: http://www.php.net/unsub.php