Re: [PATCH] cangw: Print error message on misspelled interface

[Oliver Hartkopp <socketcan@hartkopp.net>]

On 05.02.2014 16:48, Michal Sojka wrote:
> If can interface is misspelled or the kernel is configured without netlink
> cangw displayed only generic usage instruction. Now, an appropriate error
> message is displayed.
> 
> Signed-off-by: Michal Sojka <sojkam1@fel.cvut.cz>

Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>

Tnx Michal!

> ---
>  cangw.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/cangw.c b/cangw.c
> index b908fe4..effb7ed 100644
> --- a/cangw.c
> +++ b/cangw.c
> @@ -595,10 +595,18 @@ int main(int argc, char **argv)
>  
>  		case 's':
>  			src_ifindex = if_nametoindex(optarg);
> +			if (src_ifindex == 0) {
> +				perror(optarg);
> +				return 1;
> +			}
>  			break;
>  
>  		case 'd':
>  			dst_ifindex = if_nametoindex(optarg);
> +			if (dst_ifindex == 0) {
> +				perror(optarg);
> +				return 1;
> +			}
>  			break;
>  
>  		case 't':
>