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Ubuntu on Windows

(blog.dustinkirkland.com)
2049 points bpierre | 1 comments | 30 Mar 16 16:35 UTC | HN request time: 0.2s | source
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cabirum ◴[30 Mar 16 17:21 UTC] No.11391054[source]▶
Are posix permissions supported/emulated? Or are they set to 777 for all Windows drives in /mnt like shared folders in a VM?
replies(4): >>11391267 #>>11393116 #>>11393552 #>>11445615 #
the_mitsuhiko ◴[30 Mar 16 17:39 UTC] No.11391267[source]▶
Yeah, that's something that really interests me. Likewise I want to know how extended attributes and streams are mapped.
replies(1): >>11391408 #
andoma ◴[30 Mar 16 17:52 UTC] No.11391408[source]▶
Or unlinking an open file. Something you can't do on traditional Windows kernels IIRC.
replies(1): >>11415366 #
1. JdeBP ◴[03 Apr 16 08:10 UTC] No.11415366[source]▶
You recall incorrectly. Windows NT kernels have been able to unlink open files right from the get-go, at the start of the 1990s. They had to be, in order to support the POSIX subsystem.

When files are manipulated through the Win32 subsystem they are (normally) opened in "deny delete" mode (i.e. without passing FILE_SHARE_DELETE to CreateFile and thence to NtCreateFile). But that's Win32 programs and language runtime libraries explicitly setting the sharing mode flags that they like, not an inability of the Windows NT kernel that is below the Win32 subsystem, nor even an inability of the Win32 subsystem itself.

* https://msdn.microsoft.com/en-gb/library/windows/desktop/aa3...