132 lines
2.9 KiB
Go
132 lines
2.9 KiB
Go
// Copyright 2009 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 (
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"io"
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"syscall"
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)
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// MkdirAll creates a directory named path,
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// along with any necessary parents, and returns nil,
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// or else returns an error.
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// The permission bits perm are used for all
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// directories that MkdirAll creates.
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// If path is already a directory, MkdirAll does nothing
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// and returns nil.
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func MkdirAll(path string, perm FileMode) error {
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// Fast path: if we can tell whether path is a directory or file, stop with success or error.
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dir, err := Stat(path)
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if err == nil {
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if dir.IsDir() {
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return nil
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}
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return &PathError{"mkdir", path, syscall.ENOTDIR}
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}
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// Slow path: make sure parent exists and then call Mkdir for path.
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i := len(path)
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for i > 0 && IsPathSeparator(path[i-1]) { // Skip trailing path separator.
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i--
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}
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j := i
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for j > 0 && !IsPathSeparator(path[j-1]) { // Scan backward over element.
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j--
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}
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if j > 1 {
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// Create parent
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err = MkdirAll(path[0:j-1], perm)
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if err != nil {
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return err
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}
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}
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// Parent now exists; invoke Mkdir and use its result.
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err = Mkdir(path, perm)
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if err != nil {
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// Handle arguments like "foo/." by
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// double-checking that directory doesn't exist.
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dir, err1 := Lstat(path)
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if err1 == nil && dir.IsDir() {
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return nil
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}
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return err
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}
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return nil
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}
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// RemoveAll removes path and any children it contains.
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// It removes everything it can but returns the first error
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// it encounters. If the path does not exist, RemoveAll
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// returns nil (no error).
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func RemoveAll(path string) error {
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// Simple case: if Remove works, we're done.
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err := Remove(path)
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if err == nil || IsNotExist(err) {
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return nil
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}
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// Otherwise, is this a directory we need to recurse into?
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dir, serr := Lstat(path)
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if serr != nil {
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if serr, ok := serr.(*PathError); ok && (IsNotExist(serr.Err) || serr.Err == syscall.ENOTDIR) {
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return nil
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}
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return serr
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}
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if !dir.IsDir() {
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// Not a directory; return the error from Remove.
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return err
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}
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// Directory.
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fd, err := Open(path)
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if err != nil {
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if IsNotExist(err) {
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// Race. It was deleted between the Lstat and Open.
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// Return nil per RemoveAll's docs.
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return nil
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}
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return err
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}
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// Remove contents & return first error.
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err = nil
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for {
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names, err1 := fd.Readdirnames(100)
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for _, name := range names {
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err1 := RemoveAll(path + string(PathSeparator) + name)
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if err == nil {
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err = err1
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}
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}
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if err1 == io.EOF {
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break
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}
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// If Readdirnames returned an error, use it.
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if err == nil {
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err = err1
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}
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if len(names) == 0 {
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break
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}
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}
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// Close directory, because windows won't remove opened directory.
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fd.Close()
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// Remove directory.
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err1 := Remove(path)
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if err1 == nil || IsNotExist(err1) {
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return nil
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}
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if err == nil {
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err = err1
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}
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return err
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}
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