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

["Benoît Canet" <benoit.canet@irqsave.net>]

Le Wednesday 15 Aug 2012 à 10:23:32 (-0600), Eric Blake a écrit :
> 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?

benoit@Laure:~/qemu$ git grep getopt_long
fsdev/virtfs-proxy-helper.c:        c = getopt_long(argc, argv, "p:nh?f:s:u:g:", helper_opts,
qemu-ga.c:    while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
qemu-io.c:    while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
qemu-nbd.c:    while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) {
savevm.c:#define getopt_long_only getopt_long

A few occurence of getopg_long are already in qemu.

Is it a sufficient reason to keep getopt_long ?
If not what would be the alternatives ?

Benoît
> 
> -- 
> Eric Blake   eblake@redhat.com    +1-919-301-3266
> Libvirt virtualization library http://libvirt.org
>