1// Copyright 2021 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5//go:build unix
6
7package testenv
8
9import (
10	"errors"
11	"io/fs"
12	"syscall"
13)
14
15// Sigquit is the signal to send to kill a hanging subprocess.
16// Send SIGQUIT to get a stack trace.
17var Sigquit = syscall.SIGQUIT
18
19func syscallIsNotSupported(err error) bool {
20	if err == nil {
21		return false
22	}
23
24	var errno syscall.Errno
25	if errors.As(err, &errno) {
26		switch errno {
27		case syscall.EPERM, syscall.EROFS:
28			// User lacks permission: either the call requires root permission and the
29			// user is not root, or the call is denied by a container security policy.
30			return true
31		case syscall.EINVAL:
32			// Some containers return EINVAL instead of EPERM if a system call is
33			// denied by security policy.
34			return true
35		}
36	}
37
38	if errors.Is(err, fs.ErrPermission) || errors.Is(err, errors.ErrUnsupported) {
39		return true
40	}
41
42	return false
43}
44