fs.accessSync() with W_OK throws EPERM for directories in Windows

[gromnitsky]

iojs 1.6.4 x86 under Windows 8.1 64 bit

> fs.accessSync(os.tmpDir(), fs.W_OK)
Error: EPERM: operation not permitted, access 'C:\Users\alex\AppData\Local\Temp'

The same check for a directory works fine in Linux:

> fs.accessSync(os.tmpDir(), fs.W_OK)
undefined

[cjihrig]

This is the source of the problem: https://github.com/libuv/libuv/blob/v1.x/src/win/fs.c#L1315

@saghul in nodejs/node-v0.x-archive#8418 (comment), you said using the FILE_ATTRIBUTE_DIRECTORY was adapted from CPython. Do you (or a Windows person) know if that is strictly necessary?

cc: @piscisaureus

[saghul]

Hum, it might not. I'll double check.

[saghul]

@cjihrig should be fixed in libuv/libuv#316

[cjihrig]

Thanks @saghul!

[bnoordhuis]

Should be fixed by 04cc03b. Closing, holler if I should reopen it.