[Toybox] FTP commands

[ibid.ag at gmail.com]

On Thu, Dec 12, 2013 at 02:25:38PM +0530, Ashwini Sharma wrote:
> Hi,
> 
> The input parameter port was kept as string, so that the
>  user can also give service name like "ftp" instead of numeric PORT.
> 
> Which will be resolved by getaddrinfo() using /etc/services.
> 
> regards,
> Ashwini
> 
Thanks for the explanation.
Unfortunately it doesn't always work that way:

//TT.port is initialized to "ftp" if not set
static void get_sockaddr(char *host)
{
  struct addrinfo hints, *result;
  char *ptr;
  int status, port;

  errno = 0;
  port = strtoul(TT.port, &ptr, 10); // <- may set errno if non-numeric port
  if (errno || port > 65535) error_exit("Invalid port, Range
    is [0-65535]"); // <- we hit this by default on musl

  memset(&hints, 0 , sizeof(struct addrinfo));
  hints.ai_family = AF_UNSPEC;
  hints.ai_socktype = SOCK_STREAM;

  status = getaddrinfo(host, TT.port, &hints,
    &result);
  if (status) error_exit("bad address '%s' : %s",
    host, gai_strerror(status));

  memcpy(TT.buf, result->ai_addr, result->ai_addrlen);
  freeaddrinfo(result);
}

I'm thinking that should be 
-  port = strtoul(TT.port, &ptr, 10);
+  if (isdigit(TT.port[0])) port = strtoul(TT.port, &ptr, 10);

and initialize port to 0, if we want to keep support for -P ftp.
(I don't imagine anyone using -P ssh or any non-numeric port other
than "ftp".)

OK, yes that works...

Attaching my full diff, which also addresses a couple nitpicks:

-Rob adds new applets to toys/pending/, default n. 
They get default y when he thinks they're ready.
-Any user-supplied value is all-caps in the help messages, so
we have -u USER -p PASSWORD -P PORT

Thanks,
Isaac Dunham

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