package main
import (
"fmt"
"os"
"flag"
"path/filepath"
)
func usage() {
fmt.Fprintf(os.Stderr, "usage: %v arg\n", filepath.Base(os.Args[0]))
os.Exit(2)
}
func main() {
flag.Usage = usage
flag.Parse()
if flag.NArg() == 0 {
usage()
}
arg := flag.Arg(0)
}