From df674d41890a52e20cd49d3b39edd621585e6deb Mon Sep 17 00:00:00 2001
From: Brad Fitzpatrick <bradfitz@tailscale.com>
Date: Wed, 15 Jul 2020 12:31:40 -0700
Subject: [PATCH] atomicfile: don't Chmod on windows

Not supported.
---
 atomicfile/atomicfile.go | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/atomicfile/atomicfile.go b/atomicfile/atomicfile.go
index ec3025340..41c56106a 100644
--- a/atomicfile/atomicfile.go
+++ b/atomicfile/atomicfile.go
@@ -12,6 +12,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"runtime"
 )
 
 // WriteFile writes data to filename+some suffix, then renames it
@@ -31,8 +32,10 @@ func WriteFile(filename string, data []byte, perm os.FileMode) (err error) {
 	if _, err := f.Write(data); err != nil {
 		return err
 	}
-	if err := f.Chmod(perm); err != nil {
-		return err
+	if runtime.GOOS != "windows" {
+		if err := f.Chmod(perm); err != nil {
+			return err
+		}
 	}
 	if err := f.Sync(); err != nil {
 		return err