Dependencies for the affinity router and the
affinity routing daemon.
Change-Id: Icda72c3594ef7f8f0bc0c33dc03087a4c25529ca
diff --git a/vendor/github.com/coreos/etcd/pkg/fileutil/fileutil.go b/vendor/github.com/coreos/etcd/pkg/fileutil/fileutil.go
new file mode 100644
index 0000000..fce5126
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/pkg/fileutil/fileutil.go
@@ -0,0 +1,122 @@
+// Copyright 2015 The etcd 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 fileutil implements utility functions related to files and paths.
+package fileutil
+
+import (
+ "fmt"
+ "io"
+ "io/ioutil"
+ "os"
+ "path/filepath"
+ "sort"
+
+ "github.com/coreos/pkg/capnslog"
+)
+
+const (
+ // PrivateFileMode grants owner to read/write a file.
+ PrivateFileMode = 0600
+ // PrivateDirMode grants owner to make/remove files inside the directory.
+ PrivateDirMode = 0700
+)
+
+var (
+ plog = capnslog.NewPackageLogger("github.com/coreos/etcd", "pkg/fileutil")
+)
+
+// IsDirWriteable checks if dir is writable by writing and removing a file
+// to dir. It returns nil if dir is writable.
+func IsDirWriteable(dir string) error {
+ f := filepath.Join(dir, ".touch")
+ if err := ioutil.WriteFile(f, []byte(""), PrivateFileMode); err != nil {
+ return err
+ }
+ return os.Remove(f)
+}
+
+// ReadDir returns the filenames in the given directory in sorted order.
+func ReadDir(dirpath string) ([]string, error) {
+ dir, err := os.Open(dirpath)
+ if err != nil {
+ return nil, err
+ }
+ defer dir.Close()
+ names, err := dir.Readdirnames(-1)
+ if err != nil {
+ return nil, err
+ }
+ sort.Strings(names)
+ return names, nil
+}
+
+// TouchDirAll is similar to os.MkdirAll. It creates directories with 0700 permission if any directory
+// does not exists. TouchDirAll also ensures the given directory is writable.
+func TouchDirAll(dir string) error {
+ // If path is already a directory, MkdirAll does nothing
+ // and returns nil.
+ err := os.MkdirAll(dir, PrivateDirMode)
+ if err != nil {
+ // if mkdirAll("a/text") and "text" is not
+ // a directory, this will return syscall.ENOTDIR
+ return err
+ }
+ return IsDirWriteable(dir)
+}
+
+// CreateDirAll is similar to TouchDirAll but returns error
+// if the deepest directory was not empty.
+func CreateDirAll(dir string) error {
+ err := TouchDirAll(dir)
+ if err == nil {
+ var ns []string
+ ns, err = ReadDir(dir)
+ if err != nil {
+ return err
+ }
+ if len(ns) != 0 {
+ err = fmt.Errorf("expected %q to be empty, got %q", dir, ns)
+ }
+ }
+ return err
+}
+
+func Exist(name string) bool {
+ _, err := os.Stat(name)
+ return err == nil
+}
+
+// ZeroToEnd zeros a file starting from SEEK_CUR to its SEEK_END. May temporarily
+// shorten the length of the file.
+func ZeroToEnd(f *os.File) error {
+ // TODO: support FALLOC_FL_ZERO_RANGE
+ off, err := f.Seek(0, io.SeekCurrent)
+ if err != nil {
+ return err
+ }
+ lenf, lerr := f.Seek(0, io.SeekEnd)
+ if lerr != nil {
+ return lerr
+ }
+ if err = f.Truncate(off); err != nil {
+ return err
+ }
+ // make sure blocks remain allocated
+ if err = Preallocate(f, lenf, true); err != nil {
+ return err
+ }
+ _, err = f.Seek(off, io.SeekStart)
+ return err
+}