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- // Copyright 2018 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.
- //go:build !aix && !darwin && !dragonfly && !freebsd && !hurd && !linux && !netbsd && !openbsd && !solaris
- package os
- import (
- "io"
- "runtime"
- "syscall"
- )
- func removeAll(path string) error {
- if path == "" {
- // fail silently to retain compatibility with previous behavior
- // of RemoveAll. See issue 28830.
- return nil
- }
- // The rmdir system call permits removing "." on Plan 9,
- // so we don't permit it to remain consistent with the
- // "at" implementation of RemoveAll.
- if endsWithDot(path) {
- return &PathError{Op: "RemoveAll", Path: path, Err: syscall.EINVAL}
- }
- // Simple case: if Remove works, we're done.
- err := Remove(path)
- if err == nil || IsNotExist(err) {
- return nil
- }
- // Otherwise, is this a directory we need to recurse into?
- dir, serr := Lstat(path)
- if serr != nil {
- if serr, ok := serr.(*PathError); ok && (IsNotExist(serr.Err) || serr.Err == syscall.ENOTDIR) {
- return nil
- }
- return serr
- }
- if !dir.IsDir() {
- // Not a directory; return the error from Remove.
- return err
- }
- // Remove contents & return first error.
- err = nil
- for {
- fd, err := Open(path)
- if err != nil {
- if IsNotExist(err) {
- // Already deleted by someone else.
- return nil
- }
- return err
- }
- const reqSize = 1024
- var names []string
- var readErr error
- for {
- numErr := 0
- names, readErr = fd.Readdirnames(reqSize)
- for _, name := range names {
- err1 := RemoveAll(path + string(PathSeparator) + name)
- if err == nil {
- err = err1
- }
- if err1 != nil {
- numErr++
- }
- }
- // If we can delete any entry, break to start new iteration.
- // Otherwise, we discard current names, get next entries and try deleting them.
- if numErr != reqSize {
- break
- }
- }
- // Removing files from the directory may have caused
- // the OS to reshuffle it. Simply calling Readdirnames
- // again may skip some entries. The only reliable way
- // to avoid this is to close and re-open the
- // directory. See issue 20841.
- fd.Close()
- if readErr == io.EOF {
- break
- }
- // If Readdirnames returned an error, use it.
- if err == nil {
- err = readErr
- }
- if len(names) == 0 {
- break
- }
- // We don't want to re-open unnecessarily, so if we
- // got fewer than request names from Readdirnames, try
- // simply removing the directory now. If that
- // succeeds, we are done.
- if len(names) < reqSize {
- err1 := Remove(path)
- if err1 == nil || IsNotExist(err1) {
- return nil
- }
- if err != nil {
- // We got some error removing the
- // directory contents, and since we
- // read fewer names than we requested
- // there probably aren't more files to
- // remove. Don't loop around to read
- // the directory again. We'll probably
- // just get the same error.
- return err
- }
- }
- }
- // Remove directory.
- err1 := Remove(path)
- if err1 == nil || IsNotExist(err1) {
- return nil
- }
- if runtime.GOOS == "windows" && IsPermission(err1) {
- if fs, err := Stat(path); err == nil {
- if err = Chmod(path, FileMode(0200|int(fs.Mode()))); err == nil {
- err1 = Remove(path)
- }
- }
- }
- if err == nil {
- err = err1
- }
- return err
- }
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