func setCurrentFile(dirname string, fs db.FileSystem, fileNum uint64) error {
newFilename := dbFilename(dirname, fileTypeCurrent, fileNum)
oldFilename := fmt.Sprintf("%s.%06d.dbtmp", newFilename, fileNum)
fs.Remove(oldFilename)
f, err := fs.Create(oldFilename)
if err != nil {
return err
}
if _, err := fmt.Fprintf(f, "MANIFEST-%06d\n", fileNum); err != nil {
return err
}
if err := f.Close(); err != nil {
return err
}
return fs.Rename(oldFilename, newFilename)
}
