diff options
| -rw-r--r-- | tools/ipconverter/main.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/ipconverter/main.go b/tools/ipconverter/main.go index 1211970..e0893a1 100644 --- a/tools/ipconverter/main.go +++ b/tools/ipconverter/main.go @@ -11,6 +11,11 @@ import ( ) func main() { + if len(os.Args) < 2 { + fmt.Fprintf(os.Stderr, "usage: %s <ip2int|int2ip> <values>\n", os.Args[0]) + os.Exit(1) + } + cmd := path.Base(os.Args[1]) switch cmd { |