65 lines
1.1 KiB
Go
65 lines
1.1 KiB
Go
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package main
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import "fmt"
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import "crypto/sha256"
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import "io"
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import "log"
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import "os"
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import "path/filepath"
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import "sync/atomic"
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var chan_hash chan string
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var running int32
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func walk(path string, info os.FileInfo, err error) error {
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if err != nil {
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log.Fatalln(err)
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return err
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}
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if info.IsDir() {
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return nil
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} else {
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atomic.AddInt32(&running, 1)
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go hash(info.Name(), path)
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}
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return nil
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}
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func hash(name string, path string) {
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h, err := sha256File(path)
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if err != nil {
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log.Fatalln(err)
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}
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chan_hash <- fmt.Sprintf("SHA256 (%s) = %x", name, h)
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}
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func sha256File(path string) ([]byte, error) {
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f, err := os.Open(path)
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if err != nil {
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log.Fatalln(err)
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return nil, err
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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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return h.Sum(nil), nil
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}
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func main() {
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if len(os.Args) < 2 {
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log.Fatalln("Usage shadir file")
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}
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chan_hash = make(chan string)
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if err := filepath.Walk(os.Args[1], walk); err != nil {
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panic(err)
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}
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for str := range chan_hash {
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fmt.Println(str)
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atomic.AddInt32(&running, -1)
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if running <= 0 {
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return
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}
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}
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}
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