tools: Print usage for frrinit.sh when running without arguments

```
root@spine1-debian-11:~/frr# /usr/lib/frr/frrinit.sh
Usage:
    /usr/lib/frr/frrinit.sh (start|stop|restart|force-reload|reload|status)
```

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>

diff --git a/tools/frrinit.sh.in b/tools/frrinit.sh.in
index df5f0853da0ee3887654a4edba027022263ecb71..bc93ea33f0c77f4886a94bf87eb6e83b3abae6f3 100644 (file)
--- a/tools/frrinit.sh.in
+++ b/tools/frrinit.sh.in
@@ -127,6 +127,8 @@ reload)
        ;;
 
 *)
-       log_failure_msg "Unknown command: $1" >&2
+       echo "Usage:"
+       echo "    ${0} (start|stop|restart|force-reload|reload|status)"
        exit 1
+       ;;
 esac