qemu-io: Make filename optional
Giving a filename is actually not essential, since it can be specified through the options as well - on the contrary: Sometimes a filename must not be given. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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		| @@ -163,11 +163,13 @@ static int open_f(BlockDriverState *bs, int argc, char **argv) | ||||
|         flags |= BDRV_O_RDWR; | ||||
|     } | ||||
|  | ||||
|     if (optind != argc - 1) { | ||||
|     if (optind == argc - 1) { | ||||
|         return openfile(argv[optind], flags, growable, opts); | ||||
|     } else if (optind == argc) { | ||||
|         return openfile(NULL, flags, growable, opts); | ||||
|     } else { | ||||
|         return qemuio_command_usage(&open_cmd); | ||||
|     } | ||||
|  | ||||
|     return openfile(argv[optind], flags, growable, opts); | ||||
| } | ||||
|  | ||||
| static int quit_f(BlockDriverState *bs, int argc, char **argv) | ||||
|   | ||||
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