1 // Copyright 2011 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.
7 func isExist(err error
) bool {
8 return checkErrMessageContent(err
, "exists", "is a directory")
11 func isNotExist(err error
) bool {
12 return checkErrMessageContent(err
, "does not exist", "not found",
13 "has been removed", "no parent")
16 func isPermission(err error
) bool {
17 return checkErrMessageContent(err
, "permission denied")
20 // checkErrMessageContent checks if err message contains one of msgs.
21 func checkErrMessageContent(err error
, msgs
...string) bool {
25 err
= underlyingError(err
)
26 for _
, msg
:= range msgs
{
27 if contains(err
.Error(), msg
) {
34 // contains is a local version of strings.Contains. It knows len(sep) > 1.
35 func contains(s
, sep
string) bool {
38 for i
:= 0; i
+n
<= len(s
); i
++ {
39 if s
[i
] == c
&& s
[i
:i
+n
] == sep
{