Problems with file creation, what means L"\\??\\C:\\" vs. L"C:\\"

[Tobias Burnus]

Hello,

I try to create a file with Origin 6.0 and saving (only) in Origin's internal
format fails. Writing other file types (in Origin) to that directory
works flawlessly.
(Below the output using +file,+ntdll)

First, kernel/file.c's CreateFileW is called
-------------
trace:file:CreateFileW L"C:\Program Files\origin6.0\UNTITLED.OPJ"
GENERIC_READ GENERIC_WRITE FILE_SHARE_READ FILE_SHARE_WRITE  creation 5
attributes 0x80
-------------
(creation 5 = TRUNCATE_EXISTING; attributes 0x80 = FILE_ATTRIBUTE_NORMAL)

which then calls NtCreateFile:

-------------
trace:ntdll:NtCreateFile handle=0x406de164 access=c0000000
name=L"\??\C:\Program Files\origin6.0\UNTITLED.OPJ"
objattr=00000040 root=(nil) sec=(nil) io=0x406de168
alloc_size=(nil)attr=00000080 sharing=00000001 disp=1 options=00000050
ea=(nil).0x00000000
-------------
(access=c0000000 = GENERIC_READ|GENERIC_WRITE = 0x80000000|0x40000000 
objattr=00000040 = OBJ_CASE_INSENSITIVE)

Which fails then with:
-------------
warn:file:wine_nt_to_unix_file_name L"UNTITLED.OPJ" not found in /home/wine/.wine/dosdevices/c:/Program Files/origin6.0
warn:ntdll:NtCreateFile L"\??\C:\Program Files\origin6.0\UNTITLED.OPJ" not found (c0000034)
warn:file:CreateFileW Unable to create file L"C:\Program Files\origin6.0\UNTITLED.OPJ" (status c0000034)
trace:file:CreateFileW returning 0xffffffff
-----------

Except for the L"\??\" whick looks odd to me, I frankly have no idea
what's going wrong. Any tips welcome.

(Details can be found from line 675 on in
http://bugs.winehq.org/attachment.cgi?id=958 of Bug
http://bugs.winehq.org/show_bug.cgi?id=3115 )

Tobias

[Alexandre Julliard]

Tobias Burnus  writes:
> Hello,
>
> I try to create a file with Origin 6.0 and saving (only) in Origin's internal
> format fails. Writing other file types (in Origin) to that directory
> works flawlessly.
> (Below the output using +file,+ntdll)
> First, kernel/file.c's CreateFileW is called
>
> trace:file:CreateFileW L"C:\Program Files\origin6.0\UNTITLED.OPJ"
> GENERIC_READ GENERIC_WRITE FILE_SHARE_READ FILE_SHARE_WRITE  creation 5
> attributes 0x80
>
> (creation 5 = TRUNCATE_EXISTING; attributes 0x80 = FILE_ATTRIBUTE_NORMAL)
>
> which then calls NtCreateFile:
>
> trace:ntdll:NtCreateFile handle=0x406de164 access=c0000000
> name=L"\??\C:\Program Files\origin6.0\UNTITLED.OPJ"
> objattr=00000040 root=(nil) sec=(nil) io=0x406de168
> alloc_size=(nil)attr=00000080 sharing=00000001 disp=1 options=00000050
> ea=(nil).0x00000000
>
> (access=c0000000 = GENERIC_READ|GENERIC_WRITE = 0x80000000|0x40000000 
> objattr=00000040 = OBJ_CASE_INSENSITIVE)
> Which fails then with:
>
> warn:file:wine_nt_to_unix_file_name L"UNTITLED.OPJ" not found in /home/wine/.wine/dosdevices/c:/Program Files/origin6.0
> warn:ntdll:NtCreateFile L"\??\C:\Program Files\origin6.0\UNTITLED.OPJ" not found (c0000034)
> warn:file:CreateFileW Unable to create file L"C:\Program Files\origin6.0\UNTITLED.OPJ" (status c0000034)
> trace:file:CreateFileW returning 0xffffffff
>
> Except for the L"\??\" whick looks odd to me, I frankly have no idea
> what's going wrong. Any tips welcome.

The ??\ is the NT prefix, that's normal. The problem is apparently
that the app wants to create a new file using TRUNCATE_EXISTING, which
fails if the file does not exist. So either the file should have been
created earlier on, or the app is using the wrong creation argument
for some reason.