[PATCH] umdns: fix compilation with GCC 10

[Rosen Penev]

> On Aug 31, 2020, at 00:08, Petr Štetiar <ynezz at true.cz> wrote:
> 
> Rosen Penev <rosenp at gmail.com> [2020-08-30 15:07:03]:
> 
> Hi,
> 
>> /service.c:242:10: error: 'strncpy' offset 6 from the object at 'b' is
>> out of the bounds of referenced subobject 'name' with type 'uint8_t[]'
>> {aka 'unsigned char[]'} at offset 6 [-Werror=array-bounds]
>> 242 | s->id = strncpy(d_id, blobmsg_name(b), n);
> 
> how could one reproduce this error message?
GCC10?
> 
>> Signed-off-by: Rosen Penev <rosenp at gmail.com>
>> ---
>> service.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>> 
>> diff --git a/service.c b/service.c
>> index 53f44c1..e649b64 100644
>> --- a/service.c
>> +++ b/service.c
>> @@ -240,7 +240,7 @@ service_load_blob(struct blob_attr *b)
>>        return;
>> 
>>    s->port = blobmsg_get_u32(_tb[SERVICE_PORT]);
>> -    s->id = strncpy(d_id, blobmsg_name(b), n);
>> +    s->id = memcpy(d_id, blobmsg_name(b), n);
> 
> -- ynezz