On Wed, Apr 23, 2014 at 12:04:49PM +0200, Kevin Wolf wrote:
> From: Fam Zheng <[email protected]>
>
> Previously, when there is a user error in argv parsing, qemu-img prints
> help text and exits.
>
> Add an error_exit function to print a helpful error message and a hint
> to run 'qemu-img --help' for more information.
>
> As a bonus, "qemu-img <cmd> --help" now has a more reasonable exit code
> 0.
>
> In the future the help text should be split by sub command, and only
> print the information for the specified command.
>
> Signed-off-by: Fam Zheng <[email protected]>
> Signed-off-by: Kevin Wolf <[email protected]>
> ---
This breaks 'qemu-img --help':
./qemu-img --help
qemu-img: Command not found: --help
Try 'qemu-img --help' for more information
See below:
<snip>
> bs = bdrv_new_open("image", filename, fmt,
> @@ -2781,8 +2799,9 @@ int main(int argc, char **argv)
>
> qemu_init_main_loop();
> bdrv_init();
> - if (argc < 2)
> - help();
> + if (argc < 2) {
> + error_exit("Not enough arguments");
> + }
As an aside, are we sure we want './qemu-img' with no arguments to not
return the full help message?
> cmdname = argv[1];
> argc--; argv++;
>
> @@ -2794,6 +2813,5 @@ int main(int argc, char **argv)
> }
>
> /* not found */
> - help();
> - return 0;
> + error_exit("Command not found: %s", cmdname);
Looks like we just relied previously on the default 'not found' case
for help() to provide the "--help" option.
> }
> --
> 1.8.3.1
>
>
