getopt example please

[simendsjo]

On 02/26/2014 11:06 AM, Tobias Pankrath wrote:
> On Wednesday, 26 February 2014 at 09:57:19 UTC, Andrew Edwards wrote:
>> Request a small example of how to use getopt to accomplish the following:
>>
>> [1] program subcommand //process subcommand with default arguments if any
>> [2] program -h subcommand //output help information about subcommand
>> [3] program subcommand --option1 --option2 true option3=log.txt //
>> process subcommand with user specified options
>>
>> Thanks,
>> Andrew
>
> This is not fully automated with getopt. You could use getopt to parse
> all non-positional arguments and than parse the rest by hand.
> --
> getopt(args, ...);
> --
> Now, args[1] (or [0]?) should be "subcommand".

args[0] is the program itself. As Tobias mention, you can check the 
first subcommand and use a different getopt strategy for each.

It's possible to say to getopt that it should not throw an error when it 
encounters unknown parameters so you can parse them yourself.