syncthing/lib/osutil/atomic_unix_test.go

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// Copyright (C) 2016 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
//go:build !windows
// +build !windows
// (No syscall.Umask or the equivalent on Windows)
package osutil
import (
"os"
"syscall"
"testing"
)
func TestTempFilePermissions(t *testing.T) {
// Set a zero umask, so any files created will have the permission bits
// asked for in the create call and nothing less.
oldMask := syscall.Umask(0)
defer syscall.Umask(oldMask)
fd, err := os.CreateTemp("", "test")
if err != nil {
t.Fatal(err)
}
info, err := fd.Stat()
if err != nil {
t.Fatal(err)
}
defer os.Remove(fd.Name())
defer fd.Close()
// The temp file should have 0600 permissions at the most, or we have a
// security problem in CreateAtomic.
t.Logf("Got 0%03o", info.Mode())
if info.Mode()&^0600 != 0 {
t.Errorf("Permission 0%03o is too generous", info.Mode())
}
}