vendor files

vendor/k8s.io/kubernetes/pkg/util/removeall/removeall.go

@@ -0,0 +1,108 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package removeall
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"syscall"
+
+	"k8s.io/kubernetes/pkg/util/mount"
+)
+
+// RemoveAllOneFilesystem 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).
+// It makes sure it does not cross mount boundary, i.e. it does *not* remove
+// files from another filesystems. Like 'rm -rf --one-file-system'.
+// It is copied from RemoveAll() sources, with IsLikelyNotMountPoint
+func RemoveAllOneFilesystem(mounter mount.Interface, path string) error {
+	// Simple case: if Remove works, we're done.
+	err := os.Remove(path)
+	if err == nil || os.IsNotExist(err) {
+		return nil
+	}
+
+	// Otherwise, is this a directory we need to recurse into?
+	dir, serr := os.Lstat(path)
+	if serr != nil {
+		if serr, ok := serr.(*os.PathError); ok && (os.IsNotExist(serr.Err) || serr.Err == syscall.ENOTDIR) {
+			return nil
+		}
+		return serr
+	}
+	if !dir.IsDir() {
+		// Not a directory; return the error from Remove.
+		return err
+	}
+
+	// Directory.
+	isNotMount, err := mounter.IsLikelyNotMountPoint(path)
+	if err != nil {
+		return err
+	}
+	if !isNotMount {
+		return fmt.Errorf("cannot delete directory %s: it is a mount point", path)
+	}
+
+	fd, err := os.Open(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			// Race. It was deleted between the Lstat and Open.
+			// Return nil per RemoveAll's docs.
+			return nil
+		}
+		return err
+	}
+
+	// Remove contents & return first error.
+	err = nil
+	for {
+		names, err1 := fd.Readdirnames(100)
+		for _, name := range names {
+			err1 := RemoveAllOneFilesystem(mounter, path+string(os.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
+		}
+	}
+
+	// Close directory, because windows won't remove opened directory.
+	fd.Close()
+
+	// Remove directory.
+	err1 := os.Remove(path)
+	if err1 == nil || os.IsNotExist(err1) {
+		return nil
+	}
+	if err == nil {
+		err = err1
+	}
+	return err
+}