blob: 80527e227c9964cbb631db7cd42445bbf9c416b9 [file] [log] [blame]
// 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.
// +build !aix,!darwin,!dragonfly,!freebsd,!linux,!netbsd,!openbsd,!solaris
package os
import (
"io"
"syscall"
)
// RemoveAll removes path and any children it contains.
// It removes everything it can but returns the first error
// it encounters. If the path does not exist, RemoveAll
// returns nil (no error).
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{"RemoveAll", path, 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 request = 1024
names, err1 := fd.Readdirnames(request)
// 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()
for _, name := range names {
err1 := RemoveAll(path + string(PathSeparator) + name)
if err == nil {
err = err1
}
}
if err1 == io.EOF {
break
}
// If Readdirnames returned an error, use it.
if err == nil {
err = err1
}
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) < request {
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 err == nil {
err = err1
}
return err
}