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package main
import (
"bufio"
"flag"
"fmt"
"math/rand"
"os"
"strings"
"time"
)
var numWords = flag.Int("w", 4, "Number of words in passphrase")
func readLines(path string) ([]string, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
defer file.Close()
var lines []string
scanner := bufio.NewScanner(file)
for scanner.Scan() {
lines = append(lines, scanner.Text())
}
return lines, scanner.Err()
}
func init() {
rand.Seed(time.Now().UTC().UnixNano())
}
func main() {
flag.Parse()
args := flag.Args()
wordsFile := "/usr/share/dict/words"
if len(args) > 0 {
wordsFile = args[0]
}
words, err := readLines(wordsFile)
if err != nil {
fmt.Println(err)
return
}
phraseWords := make([]string, *numWords)
for index := 0; index < *numWords; index++ {
randInt := rand.Intn((len(words) - 1))
phraseWords[index] = words[randInt]
}
fmt.Println(strings.Join(phraseWords, " "))
}
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