os: Windows: os.Stat() failed for junctions

[gopherbot]

by KoRoN.KaoriYa:

Target version: go1.4rc2.windows-amd64


Steps to reproduce:

1. make a junction: mklink /j C:\junction C:\Windows
2. apply os.Stat() to that junction: os.Stat(`C:\junction`)


What happened?:

os.Stat() returns an error always.


What should have happened instead?

Return valid os.FileInfo without any errors.


Please provide any additional information below.

For junctions, file attribute are reported as REPARSE_POINT (ModeSymLink).
But its ReparseTag is MOUNTPOINT, not SYMLINK.
(see http://msdn.microsoft.com/en-us/library/cc232007.aspx)
It makes syscall.Readlink() failed, so os.Stat() is failed too.

[gopherbot]

Comment 1:

CL https://golang.org/cl/180500043 mentions this issue.

[ianlancetaylor]

Comment 2:

Labels changed: added repo-main, release-go1.5, os-windows.

[mattn]

https://go-review.googlesource.com/#/c/1767/

[alexbrainman]

new CL is https://go-review.googlesource.com/#/c/2086/

[alexbrainman]

and another new CL is https://go-review.googlesource.com/#/c/2307/