f4372710bf
This is a mostly pointless change to make security scanners and static analysis tools happy, as they all hate seeing md5. None of our md5 uses were security relevant, but still. Only visible effect of this change is that our temp file names for very long file names become slightly longer than they were previously...
98 lines
1.7 KiB
Go
98 lines
1.7 KiB
Go
// Copyright (C) 2015 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package main
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import (
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"flag"
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"fmt"
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"io"
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"os"
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"time"
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"github.com/syncthing/syncthing/lib/sha256"
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)
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func main() {
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period := flag.Duration("period", 200*time.Millisecond, "Sleep period between checks")
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flag.Parse()
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file := flag.Arg(0)
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if file == "" {
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fmt.Println("Expects a path as an argument")
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return
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}
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exists := true
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size := int64(0)
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mtime := time.Time{}
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var hash [sha256.Size]byte
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for {
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time.Sleep(*period)
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newExists := true
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fi, err := os.Stat(file)
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if err != nil && os.IsNotExist(err) {
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newExists = false
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} else if err != nil {
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fmt.Println("stat:", err)
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return
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}
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if newExists != exists {
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exists = newExists
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if !newExists {
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fmt.Println(file, "does not exist")
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} else {
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fmt.Println(file, "appeared")
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}
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}
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if !exists {
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size = 0
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mtime = time.Time{}
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hash = [sha256.Size]byte{}
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continue
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}
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if fi.IsDir() {
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fmt.Println(file, "is directory")
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return
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}
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newSize := fi.Size()
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newMtime := fi.ModTime()
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newHash, err := sha256file(file)
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if err != nil {
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fmt.Println("sha256file:", err)
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}
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if newSize != size || newMtime != mtime || newHash != hash {
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fmt.Println(file, "Size:", newSize, "Mtime:", newMtime, "Hash:", fmt.Sprintf("%x", newHash))
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hash = newHash
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size = newSize
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mtime = newMtime
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}
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}
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}
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func sha256file(fname string) (hash [sha256.Size]byte, err error) {
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f, err := os.Open(fname)
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if err != nil {
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return
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}
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defer f.Close()
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h := sha256.New()
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io.Copy(h, f)
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hb := h.Sum(nil)
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copy(hash[:], hb)
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return
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}
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