Re: [patch] The most minor issue ever: set noninteractive on -iL -

[David Fifield <david () bamsoftware com>]

On Wed, Mar 28, 2012 at 12:07:25PM -0500, Daniel Miller wrote:
> List,
>
> While digging through the option parsing in nmap.cc for a
> presentation, I noticed that the input of hostnames (-iL or -i)
> could come from stdin. I think if this is used, then
> o.noninteractive should be set, since there would be no way to get
> keystrokes:
> > Index: nmap.cc
> > ===================================================================
> > --- nmap.cc    (revision 28355)
> > +++ nmap.cc    (working copy)
> > @@ -1048,6 +1048,7 @@
> >       }
> >       if (!strcmp(optarg, "-")) {
> >         o.inputfd = stdin;
> > +        o.noninteractive = true;
> >       } else {
> >         o.inputfd = fopen(optarg, "r");
> >         if (!o.inputfd) {
>
> I doubt this really matters much, but I thought I'd mention it.

Thanks, Dan, but I think this is incorrect. Nmap doesn't get runtime
interaction keystrokes from stdin, but from the tty. I just tested it
and this works:

nmap --scan-delay 10ms -iL - < input.txt

But this doesn't:

cat input.txt | nmap --scan-delay 10ms -iL -

Probably there is some subshell interaction with the tty that prevents
the second example from working.

David Fifield
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