Re: [Qemu-devel] [PATCH 3/3] qemu-img: Add json output option to the info command.

[Eric Blake]

On 08/15/2012 08:54 AM, Benoît Canet wrote:
> This additionnal --machine=json option make qemu-img info output on
> stdout a JSON formated representation of the image informations.
> 
> --machine=json was choosen instead of --format=json because the
> info command already have a -f parameter.

Do we want a counterpart '--machine=text' or '--machine=human' to
explicitly specify current output format?

> @@ -1113,10 +1174,20 @@ static int img_info(int argc, char **argv)
>      char backing_filename[1024];
>      char backing_filename2[1024];
>      BlockDriverInfo bdi;
> +    ImageInfo *image_info;
>  
>      fmt = NULL;
> +    machine = NULL;
>      for(;;) {
> -        c = getopt(argc, argv, "f:h");
> +        int option_index = 0;
> +        static struct option long_options[] = {
> +            {"help", no_argument, 0, 'h'},
> +            {"format", required_argument, 0, 'f'},
> +            {"machine", required_argument, 0, 'm'},
> +            {0, 0, 0, 0}
> +        };
> +        c = getopt_long(argc, argv, "f:h",
> +                        long_options, &option_index);

getopt_long is not in POSIX.  Are you sure this will compile on all
target platforms?

-- 
Eric Blake   address@hidden    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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