diff options
Diffstat (limited to 'src/main.go')
| -rw-r--r-- | src/main.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/main.go b/src/main.go index 4bece16..0857999 100644 --- a/src/main.go +++ b/src/main.go @@ -1,11 +1,17 @@ package main import ( + "fmt" "log" "os" "runtime" ) +func printUsage() { + fmt.Printf("usage:\n") + fmt.Printf("%s [-f/--foreground] INTERFACE-NAME\n", os.Args[0]) +} + func main() { // parse arguments @@ -13,6 +19,7 @@ func main() { var foreground bool var interfaceName string if len(os.Args) < 2 || len(os.Args) > 3 { + printUsage() return } @@ -21,6 +28,7 @@ func main() { case "-f", "--foreground": foreground = true if len(os.Args) != 3 { + printUsage() return } interfaceName = os.Args[2] @@ -28,6 +36,7 @@ func main() { default: foreground = false if len(os.Args) != 2 { + printUsage() return } interfaceName = os.Args[1] |