go version of sha1sum

sha1sum.go

package main

import (
	"crypto/sha1"
	"fmt"
	"io/ioutil"
	"log"
	"os"
)

func main() {
	if len(os.Args) < 2 {
		fmt.Println("Filename(s) missing")
		os.Exit(1)
	}

	h := sha1.New()

	for _, filename := range os.Args[1:] {
		fdesc, error := ioutil.ReadFile(filename)
		if error != nil {
			defer log.Fatal(error)
			continue
		}

		h.Write(fdesc)
		h.Reset()
		fmt.Printf("%s - %x\n", filename, h.Sum(nil))

	}
}