| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // +build darwin freebsd linux netbsd openbsd windows |
| |
| package os |
| |
| import "syscall" |
| |
| // IsExist returns whether the error is known to report that a file already exists. |
| // It is satisfied by ErrExist as well as some syscall errors. |
| func IsExist(err error) bool { |
| if pe, ok := err.(*PathError); ok { |
| err = pe.Err |
| } |
| return err == syscall.EEXIST || err == ErrExist |
| } |
| |
| // IsNotExist returns whether the error is known to report that a file does not exist. |
| // It is satisfied by ErrNotExist as well as some syscall errors. |
| func IsNotExist(err error) bool { |
| if pe, ok := err.(*PathError); ok { |
| err = pe.Err |
| } |
| return err == syscall.ENOENT || err == ErrNotExist |
| } |
| |
| // IsPermission returns whether the error is known to report that permission is denied. |
| // It is satisfied by ErrPermission as well as some syscall errors. |
| func IsPermission(err error) bool { |
| if pe, ok := err.(*PathError); ok { |
| err = pe.Err |
| } |
| return err == syscall.EACCES || err == syscall.EPERM || err == ErrPermission |
| } |