* win32/win32.c (rb_w32_wreadlink): fixed a bug that a junktion misses

its drive letter.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50352 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Mon Apr 20 15:02:47 2015  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* win32/win32.c (rb_w32_wreadlink): fixed a bug that a junktion misses
+	  its drive letter.
+
 Mon Apr 20 12:54:56 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
 
 	* ext/openssl/*: use license instead of licence.

win32/win32.c

@@ -4731,9 +4731,18 @@ rb_w32_wreadlink(const WCHAR *path, WCHAR *buf, size_t bufsize)
 	e = EINVAL;
     }
     else {
-	void *name = ((char *)rp.SymbolicLinkReparseBuffer.PathBuffer +
-		      rp.SymbolicLinkReparseBuffer.PrintNameOffset);
-	ret = rp.SymbolicLinkReparseBuffer.PrintNameLength;
+	void *name;
+	if (rp.ReparseTag == IO_REPARSE_TAG_SYMLINK) {
+	    name = ((char *)rp.SymbolicLinkReparseBuffer.PathBuffer +
+		    rp.SymbolicLinkReparseBuffer.PrintNameOffset);
+	    ret = rp.SymbolicLinkReparseBuffer.PrintNameLength;
+	}
+	else { /* IO_REPARSE_TAG_MOUNT_POINT */
+	    /* +4/-4 mean to drop "?\" */
+	    name = ((char *)rp.SymbolicLinkReparseBuffer.PathBuffer +
+		    rp.SymbolicLinkReparseBuffer.SubstituteNameOffset + 4);
+	    ret = rp.SymbolicLinkReparseBuffer.SubstituteNameLength - 4;
+	}
 	((WCHAR *)name)[ret/sizeof(WCHAR)] = L'\0';
 	translate_wchar(name, L'\\', L'/');
 	bufsize *= sizeof(WCHAR);