mirror of
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128 lines
3.0 KiB
Go
128 lines
3.0 KiB
Go
// +build plan9 solaris
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/*
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* MinIO Cloud Storage, (C) 2016-2020 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package cmd
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import (
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"io"
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"os"
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"strings"
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)
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// Return all the entries at the directory dirPath.
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func readDir(dirPath string) (entries []string, err error) {
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return readDirN(dirPath, -1)
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}
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// readDir applies the filter function on each entries at dirPath, doesn't recurse into
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// the directory itself.
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func readDirFilterFn(dirPath string, filter func(name string, typ os.FileMode) error) error {
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d, err := os.Open(dirPath)
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if err != nil {
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// File is really not found.
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if os.IsNotExist(err) {
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return errFileNotFound
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}
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// File path cannot be verified since one of the parents is a file.
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if strings.Contains(err.Error(), "not a directory") {
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return errFileNotFound
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}
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return err
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}
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defer d.Close()
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maxEntries := 1000
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for {
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// Read up to max number of entries.
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fis, err := d.Readdir(maxEntries)
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if err != nil {
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if err == io.EOF {
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break
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}
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return err
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}
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for _, fi := range fis {
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if err = filter(fi.Name(), fi.Mode()); err == errDoneForNow {
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// filtering requested to return by caller.
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return nil
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}
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}
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}
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return nil
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}
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// Return N entries at the directory dirPath. If count is -1, return all entries
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func readDirN(dirPath string, count int) (entries []string, err error) {
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d, err := os.Open(dirPath)
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if err != nil {
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// File is really not found.
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if os.IsNotExist(err) {
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return nil, errFileNotFound
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}
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// File path cannot be verified since one of the parents is a file.
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if strings.Contains(err.Error(), "not a directory") {
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return nil, errFileNotFound
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}
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return nil, err
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}
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defer d.Close()
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maxEntries := 1000
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if count > 0 && count < maxEntries {
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maxEntries = count
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}
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done := false
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remaining := count
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for !done {
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// Read up to max number of entries.
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fis, err := d.Readdir(maxEntries)
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if err != nil {
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if err == io.EOF {
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break
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}
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return nil, err
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}
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if count > 0 {
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if remaining <= len(fis) {
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fis = fis[:remaining]
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done = true
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}
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}
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for _, fi := range fis {
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// Not need to follow symlink.
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if fi.Mode()&os.ModeSymlink == os.ModeSymlink {
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continue
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}
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if fi.Mode().IsDir() {
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// Append SlashSeparator instead of "\" so that sorting is achieved as expected.
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entries = append(entries, fi.Name()+SlashSeparator)
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} else if fi.Mode().IsRegular() {
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entries = append(entries, fi.Name())
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}
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if count > 0 {
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remaining--
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}
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}
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}
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return entries, nil
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}
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