Re: [help-gengetopt] show help if no input

[Lorenzo Bettini]

On 17/08/2010 22.15, Duke wrote:
>  Hi folks,
Hi there
> I just heard about gengetopt, tried it and like it very much. I want 
> to change the default reaction of gengetopt a little bit to suit my 
> purpose better, so I have two questions below:
>
>  * When Print help, is there a way showing that one option is optional 
> and the other is required? For now, help shows only options and their 
> descriptions and values, no way to know if an option is optional or 
> required until one tries the program and some of its options.
for the moment this is not implemented, although in the summary of 
command invocation optional options should be printed differently (I 
should check this, I don't remember it right now and cannot check it now).

Surely, this behavior could be added (by using a command line switch of 
gengetopt itself); I should work on this (or if you want to try to 
implement it...)
>  * When there is no input (no argument or argc < 2), is there a way of 
> telling gengetopt to show help, even if there are required options? 
> For now, if there is required option, and if the program is invoked 
> without argument, then "option required" shows up, not the help.
this could be implemented in your program itself; as long as you init an 
args_info structure, then you could check argc and in case call the 
print help generated function directly; have you tried this?

hope to hear from you soon
cheers
    Lorenzo

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Lorenzo Bettini, PhD in Computer Science, DI, Univ. Torino
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