From b65f8589e847826f7a353011823558c41491cda0 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Fri, 16 Apr 2021 17:30:12 -0400
Subject: [PATCH] cmd/dist: defend self against misc/reboot test

Change-Id: Ice89ecae980d46b16b5ed32ac733bd23c92115af
Reviewed-on: https://go-review.googlesource.com/c/go/+/310870
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
---
 src/cmd/dist/util.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/cmd/dist/util.go b/src/cmd/dist/util.go
index e99375f5380..df60145d1e2 100644
--- a/src/cmd/dist/util.go
+++ b/src/cmd/dist/util.go
@@ -249,6 +249,7 @@ func writefile(text, file string, flag int) {
 	if flag&writeExec != 0 {
 		mode = 0777
 	}
+	xremove(file) // in case of symlink tricks by misc/reboot test
 	err := ioutil.WriteFile(file, new, mode)
 	if err != nil {
 		fatalf("%v", err)