Question

How can I check to see if a file is already open by another user in javascript? As it is right now, the program I’m trying to fix will open/edit a file then fail on trying to save if the file is already in use.

Also, is there an easy way to add a lock on the file so another process knows it’s in use?

Edit: the program is a .hta using Active X Objects.

i guess i should have been more specific, here’s some code about how it is opening/editing/saving the files.

var FileSystem = new ActiveXObject( "Scripting.FileSystemObject" );
var xmlDoc = new ActiveXObject( "Msxml2.DOMDocument.3.0" );
var fFile = FileSystem.GetFile( strPath );
xmlDoc.load( fFile.Path );
// some method's to edit documentElement in xmlDoc...
xmlDoc.save( fFile.Path );

Answer 1

I’m not too familiar with ActiveX, but maybe when you open a file you could create a temporary file like file.ext.lock (and delete it when you save the file), so when another user tries to open the same file and sees the .lock file exists, you know it’s being used.