Re: [PATCH v1] xentrace: adjust exit code for --help option

[George Dunlap <george.dunlap@xxxxxxxxx>]

On Fri, May 26, 2023 at 1:38 PM Olaf Hering <olaf@xxxxxxxxx> wrote:

Invoking the --help option of any tool should not return with an error,
if that tool does have a documented and implemented help option.

Adjust the usage() function to exit with either error or success.
Handle the existing entry in the option table to call usage accordingly.

Adjust the getopt value for help. The char '?' is returned for unknown
options. Returning 'h' instead of '?' allows to handle --help.

Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>

Reviewed-by: George Dunlap <george.dunlap@xxxxxxxxx>