RE: [PHP] File Locking during *other* file operations

No really good reason that I can think of. I don't see any reason as to why it wouldn't work with just 'x'. Must have been having a 'beer' moment. yes, it should probably clear out stale lock files but the files I protect with this are better left untouched if the lock fails. I think that locks fail for a reason and you should find that reason before you unlock and potentially break something. M -----Original Message----- From: Richard Lynch [mailto:ceo@l-i-e.com] Sent: 20 December 2004 18:26 To: Robinson, Matthew Cc: Michael Sims; php-general Subject: RE: [PHP] File Locking during *other* file operations Robinson, Matthew wrote: > I use this code, Not all my own, some from the php manual (probably > most of it in fact) I lock the file as filename.lock so that I can > muck about with it completely and then unlock the .lock and remove it. > > M > > function LockFile($file) > { > > $LockFile = $file . ".lock"; # Lock the file > $lf = fopen ($LockFile, "wx"); > > while ($lf === FALSE && $i++ < 20) > { > clearstatcache(); > usleep(rand(5,85)); > $lf = @fopen ($LockFile, 'x'); How come you use "wx" up there, and just 'x' here? Is there some reason for that? One may (or may not) want to consider a mechanism for throwing out really old lock files, since it's possible your PHP script or application would eventually fail to remove a lock file... Or not, depending on how you code the rest of it. -- Like Music? http://l-i-e.com/artists.htm ________________________________________________________________________ This message has been checked for all known viruses by the CitC Virus Scanning Service powered by SkyLabs. For further information visit http://www.citc.it ___ ________________________________________________________________________ This message has been checked for all known viruses by the CitC Virus Scanning Service powered by SkyLabs. For further information visit http://www.citc.it ___