From: Russ Cox <rsc@golang.org>
Date: Fri, 16 Apr 2021 21:30:12 +0000 (-0400)
Subject: cmd/dist: defend self against misc/reboot test
X-Git-Tag: go1.17beta1~585
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=b65f8589e8;p=gostls13.git

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>
---

diff --git a/src/cmd/dist/util.go b/src/cmd/dist/util.go
index e99375f538..df60145d1e 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)