package util import ( "errors" "os" "os/user" "path/filepath" "strings" "time" "github.com/seaweedfs/seaweedfs/weed/glog" ) func TestFolderWritable(folder string) (err error) { fileInfo, err := os.Stat(folder) if err != nil { return err } if !fileInfo.IsDir() { return errors.New("Not a valid folder!") } perm := fileInfo.Mode().Perm() glog.V(0).Infoln("Folder", folder, "Permission:", perm) if 0200&perm != 0 { return nil } return errors.New("Not writable!") } func GetFileSize(file *os.File) (size int64, err error) { var fi os.FileInfo if fi, err = file.Stat(); err == nil { size = fi.Size() } return } func FileExists(filename string) bool { _, err := os.Stat(filename) if os.IsNotExist(err) { return false } return true } func CheckFile(filename string) (exists, canRead, canWrite bool, modTime time.Time, fileSize int64) { exists = true fi, err := os.Stat(filename) if os.IsNotExist(err) { exists = false return } if err != nil { glog.Errorf("check %s: %v", filename, err) return } if fi.Mode()&0400 != 0 { canRead = true } if fi.Mode()&0200 != 0 { canWrite = true } modTime = fi.ModTime() fileSize = fi.Size() return } func ResolvePath(path string) string { if !strings.Contains(path, "~") { return path } usr, _ := user.Current() dir := usr.HomeDir if path == "~" { // In case of "~", which won't be caught by the "else if" path = dir } else if strings.HasPrefix(path, "~/") { // Use strings.HasPrefix so we don't match paths like // "/something/~/something/" path = filepath.Join(dir, path[2:]) } return path } func FileNameBase(filename string) string { lastDotIndex := strings.LastIndex(filename, ".") if lastDotIndex < 0 { return filename } return filename[:lastDotIndex] } // Copied from os.WriteFile(), adding file sync. // see https://github.com/golang/go/issues/20599 func WriteFile(name string, data []byte, perm os.FileMode) error { f, err := os.OpenFile(name, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm) if err != nil { return err } _, err = f.Write(data) if err1 := f.Sync(); err1 != nil && err == nil { err = err1 } if err1 := f.Close(); err1 != nil && err == nil { err = err1 } return err }