68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
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// SPDX-License-Identifier: BSD-3-Clause
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// Code in this file was derived from `go/src/os/path.go`.
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// 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 `go.LICENSE` file.
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//go:build unix
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package ufs
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import (
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"golang.org/x/sys/unix"
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)
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// mkdirAll is a recursive Mkdir implementation that properly handles symlinks.
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func (fs *UnixFS) mkdirAll(name string, mode 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 := fs.Lstat(name)
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if err == nil {
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if dir.Mode()&ModeSymlink != 0 {
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// If the final path is a symlink, resolve its target and use that
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// to check instead.
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dir, err = fs.Stat(name)
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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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if dir.IsDir() {
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return nil
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}
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return convertErrorType(&PathError{Op: "mkdir", Path: name, Err: unix.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(name)
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for i > 0 && name[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 && name[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 = fs.mkdirAll(name[:j-1], mode)
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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 = fs.Mkdir(name, mode)
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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 := fs.Lstat(name)
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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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