// Copyright 2017 The go-ethereum Authors // This file is part of the go-ethereum library. // // The go-ethereum library is free software: you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // The go-ethereum library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public License // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. package keystore import ( "io/ioutil" "os" "path/filepath" "strings" "sync" "time" mapset "github.com/deckarep/golang-set" "github.com/ethereum/go-ethereum/log" ) // fileCache is a cache of files seen during scan of keystore. type fileCache struct { all mapset.Set // Set of all files from the keystore folder lastMod time.Time // Last time instance when a file was modified mu sync.RWMutex } // scan performs a new scan on the given directory, compares against the already // cached filenames, and returns file sets: creates, deletes, updates. func (fc *fileCache) scan(keyDir string) (mapset.Set, mapset.Set, mapset.Set, error) { t0 := time.Now() // List all the failes from the keystore folder files, err := ioutil.ReadDir(keyDir) if err != nil { return nil, nil, nil, err } t1 := time.Now() fc.mu.Lock() defer fc.mu.Unlock() // Iterate all the files and gather their metadata all := mapset.NewThreadUnsafeSet() mods := mapset.NewThreadUnsafeSet() var newLastMod time.Time for _, fi := range files { path := filepath.Join(keyDir, fi.Name()) // Skip any non-key files from the folder if nonKeyFile(fi) { log.Trace("Ignoring file on account scan", "path", path) continue } // Gather the set of all and fresly modified files all.Add(path) modified := fi.ModTime() if modified.After(fc.lastMod) { mods.Add(path) } if modified.After(newLastMod) { newLastMod = modified } } t2 := time.Now() // Update the tracked files and return the three sets deletes := fc.all.Difference(all) // Deletes = previous - current creates := all.Difference(fc.all) // Creates = current - previous updates := mods.Difference(creates) // Updates = modified - creates fc.all, fc.lastMod = all, newLastMod t3 := time.Now() // Report on the scanning stats and return log.Debug("FS scan times", "list", t1.Sub(t0), "set", t2.Sub(t1), "diff", t3.Sub(t2)) return creates, deletes, updates, nil } // nonKeyFile ignores editor backups, hidden files and folders/symlinks. func nonKeyFile(fi os.FileInfo) bool { // Skip editor backups and UNIX-style hidden files. if strings.HasSuffix(fi.Name(), "~") || strings.HasPrefix(fi.Name(), ".") { return true } // Skip misc special files, directories (yes, symlinks too). if fi.IsDir() || fi.Mode()&os.ModeType != 0 { return true } return false }