Re: why was the VAR 'optind' never changed in initdb?

2012/4/9 Robert Haas <robertmhaas(at)gmail(dot)com>

> On Mon, Apr 9, 2012 at 7:38 AM, Clover White <mywhiteclover(at)gmail(dot)com>
> wrote:
> > Hi,
> > I'm debugging initdb using gdb.
> > I found that I could not step in the function getopt_long in line 2572
> in
> > initdb.c.
> > I also found that the value of VAR optind never be changed. VAR optind
> is
> > always equal to 1 but how could optind be larger than the value of
> argc(the
> > value of argc is 6) in line 2648 and 2654.
>
> Read the man page for getopt_long. It changes the global variable optind.
>
> It's a silly interface, but also a long and hallowed UNIX tradition,
> so we're stuck with it.
>
> --
> Robert Haas
> EnterpriseDB: http://www.enterprisedb.com
> The Enterprise PostgreSQL Company
>

Thanks Robert. I have read the man page for getopt_long and optind. they
are in the same man page.

but i still could not understand why optind always equal to 1 when I gdb
initdb and print optind?
Was optind supported to increased after getopt_long pasered every
parameter?

--
Clover White