Re: [PATCH 07/14] nstool: Add magic number to advertized information

[Stefano Brivio <sbrivio@redhat.com>]

On Tue,  4 Apr 2023 11:46:31 +1000
David Gibson <david@gibson.dropbear.id.au> wrote:

> So that we'll probably give a better error if you point it at something
> that's not an nstool hold control socket.
> 
> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
> ---
>  test/nstool.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/test/nstool.c b/test/nstool.c
> index 428c9c4..e995f3e 100644
> --- a/test/nstool.c
> +++ b/test/nstool.c
> @@ -12,6 +12,7 @@
>  #include <stdlib.h>
>  #include <string.h>
>  #include <stdbool.h>
> +#include <stdint.h>
>  #include <errno.h>
>  #include <unistd.h>
>  #include <getopt.h>
> @@ -45,7 +46,10 @@ const struct ns_type nstypes[] = {
>  	{ CLONE_NEWUTS, "uts" },
>  };
>  
> +#define NSTOOL_MAGIC	0x75601d75
> +
>  struct holder_info {
> +	uint64_t magic;

Is uint64_t with just 32 bits "set" a trick to detect endianness
problems (perhaps it's a common pattern I'm not aware of)?

-- 
Stefano