Re: [PATCH v3 26/30] qemu-img: Use user_creatable_process_cmdline() for --object

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Am 13.03.2021 um 13:30 hat Markus Armbruster geschrieben:
> Paolo Bonzini <pbonzini@xxxxxxxxxx> writes:
> 
> > On 13/03/21 08:40, Markus Armbruster wrote:
> >>> +                if (!user_creatable_add_from_str(optarg, &local_err)) {
> >>> +                    if (local_err) {
> >>> +                        error_report_err(local_err);
> >>> +                        exit(2);
> >>> +                    } else {
> >>> +                        /* Help was printed */
> >>> +                        exit(EXIT_SUCCESS);
> >>> +                    }
> >>> +                }
> >>> +                break;
> >>>               }
> >>> -        }   break;
> >>>           case OPTION_IMAGE_OPTS:
> >>>               image_opts = true;
> >>>               break;
> >> Why is this one different?  The others all call
> >> user_creatable_process_cmdline().
> >> 
> >> 
> >
> > It's to exit with status code 2 instead of 1.
> 
> I see.  Worth a comment?

There is a comment at the start of the function (which is just a few
lines above) that explains the exit codes:

 * Compares two images. Exit codes:
 *
 * 0 - Images are identical or the requested help was printed
 * 1 - Images differ
 * >1 - Error occurred

Kevin




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