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| 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) | |
| } |
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