Windows: hardlink support is broken on shared drives

[Patrick Mézard]

Le 23/08/10 22:22, Gavin Erry a écrit :
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> I’ve been reading this thread with interest since I posted the problem on the discussion list.  Thanks for the fix – I will test it in the next build of Hg.  It seemed strange that GetFileInformationByHandle doesn’t work too well so I had a look (in C++ though)
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> It seems that you can get different results depending on how the handle was created with the CreateFile function.
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> If I use GENERIC_READ or FILE_GENERIC_READ for the desired access in CreateFile then I get an incorrect hardlink count.
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> Using FILE_READ_ATTRIBUTES | SYNCHRONIZE (which is a subset of FILE_GENERIC_READ) then I get the correct hardlink count over the network.

OK, I have seen correct links count returned with FILE_READ_ATTRIBUTES. Do you need the SYNCHRONIZE flag too? I am asking because I first tried without it and it failed then with it alone and it succeeds and now without it, it succeeds again. It's late and I will retry again tomorrow. But I cannot make sense of SYNCHRONIZE in this context.

These flags are really promising, I managed to get the correct link count with all my setups, except when reading through Parallels share, in which case the serial number was zero.

Thanks for this excellent insight.

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Patrick Mézard