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https://github.com/golang/go
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os, syscall: windows really isn't posix compliant, fix os.IsExist()
R=golang-dev, rsc, bradfitz, alex.brainman CC=golang-dev https://golang.org/cl/5754083
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@ -2,7 +2,7 @@
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin freebsd linux netbsd openbsd windows
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// +build darwin freebsd linux netbsd openbsd
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package os
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31
src/pkg/os/error_test.go
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31
src/pkg/os/error_test.go
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@ -0,0 +1,31 @@
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// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package os_test
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import (
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"io/ioutil"
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"os"
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"testing"
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)
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func TestErrIsExist(t *testing.T) {
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f, err := ioutil.TempFile("", "_Go_ErrIsExist")
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if err != nil {
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t.Fatalf("open ErrIsExist tempfile: %s", err)
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return
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}
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defer os.Remove(f.Name())
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defer f.Close()
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f2, err := os.OpenFile(f.Name(), os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600)
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if err == nil {
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f2.Close()
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t.Fatal("Open should have failed")
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return
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}
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if !os.IsExist(err) {
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t.Fatalf("os.IsExist does not work as expected for %#v", err)
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return
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}
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}
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35
src/pkg/os/error_windows.go
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35
src/pkg/os/error_windows.go
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@ -0,0 +1,35 @@
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// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package os
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import "syscall"
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// IsExist returns whether the error is known to report that a file already exists.
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// It is satisfied by ErrExist as well as some syscall errors.
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func IsExist(err error) bool {
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if pe, ok := err.(*PathError); ok {
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err = pe.Err
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}
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return err == syscall.EEXIST || err == syscall.ERROR_ALREADY_EXISTS ||
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err == syscall.ERROR_FILE_EXISTS || err == ErrExist
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}
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// IsNotExist returns whether the error is known to report that a file does not exist.
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// It is satisfied by ErrNotExist as well as some syscall errors.
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func IsNotExist(err error) bool {
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if pe, ok := err.(*PathError); ok {
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err = pe.Err
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}
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return err == syscall.ENOENT || err == ErrNotExist
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}
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// IsPermission returns whether the error is known to report that permission is denied.
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// It is satisfied by ErrPermission as well as some syscall errors.
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func IsPermission(err error) bool {
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if pe, ok := err.(*PathError); ok {
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err = pe.Err
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}
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return err == syscall.EACCES || err == syscall.EPERM || err == ErrPermission
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}
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@ -10,11 +10,13 @@ const (
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ERROR_PATH_NOT_FOUND Errno = 3
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ERROR_ACCESS_DENIED Errno = 5
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ERROR_NO_MORE_FILES Errno = 18
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ERROR_FILE_EXISTS Errno = 80
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ERROR_BROKEN_PIPE Errno = 109
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ERROR_BUFFER_OVERFLOW Errno = 111
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ERROR_INSUFFICIENT_BUFFER Errno = 122
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ERROR_MOD_NOT_FOUND Errno = 126
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ERROR_PROC_NOT_FOUND Errno = 127
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ERROR_ALREADY_EXISTS Errno = 183
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ERROR_ENVVAR_NOT_FOUND Errno = 203
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ERROR_OPERATION_ABORTED Errno = 995
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ERROR_IO_PENDING Errno = 997
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