From cd589c8a73415afbf94a8976f20cbed9d4061ba6 Mon Sep 17 00:00:00 2001
From: qmuntal <quimmuntal@gmail.com>
Date: Tue, 8 Aug 2023 15:31:43 +0200
Subject: os: make MkdirAll support volume names

MkdirAll fails to create directories under root paths using volume
names (e.g. //?/Volume{GUID}/foo). This is because fixRootDirectory
only handle extended length paths using drive letters (e.g. //?/C:/foo).

This CL fixes that issue by also detecting volume names without path
separator.

Updates #22230
Fixes #39785

Change-Id: I813fdc0b968ce71a4297f69245b935558e6cd789
Reviewed-on: https://go-review.googlesource.com/c/go/+/517015
Run-TryBot: Quim Muntal <quimmuntal@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
---
 src/os/path_plan9.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/os/path_plan9.go')

diff --git a/src/os/path_plan9.go b/src/os/path_plan9.go
index a54b4b98f1..f1c9dbc048 100644
--- a/src/os/path_plan9.go
+++ b/src/os/path_plan9.go
@@ -14,6 +14,6 @@ func IsPathSeparator(c uint8) bool {
 	return PathSeparator == c
 }
 
-func fixRootDirectory(p string) string {
-	return p
+func volumeName(p string) string {
+	return ""
 }
-- 
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