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\??\ in rename callback

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The cross-platform framework that simplifies synchronizing data between mobile and desktop applications and servers and cloud storages
#11836
Posted: 11/27/2009 22:16:01
by Aidan Salvi (Standard support level)
Joined: 11/27/2009
Posts: 14

I wanted to know why I get the extra "\??\ when the rename callback is returned with the new file name.

For Exaample it is: \??\C:\<New file name path>, the old file name is correctly C:\...
#11837
Posted: 11/28/2009 01:52:47
by Volodymyr Zinin (Team)

What a product are you asking about? CallbackDisk doesn't have the rename callback.
#11863
Posted: 12/01/2009 16:25:19
by Aidan Salvi (Standard support level)
Joined: 11/27/2009
Posts: 14

Callback filter.
#11866
Posted: 12/02/2009 04:20:46
by Vladimir Cherniga (Team)

This prefix (\??) is a synonym for "\DosDevices" directory in the object manager name space. In Windows XP and later each session has its own drive letter map. This prefix means that drive letter name will be resolved to the global MS-DOS device name, visible for all sessions.
Search for the "Local and Global MS-DOS Device Names" in MSDN for more details.

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