init.c

wget讓你可以在console介面下

    }
  *(SUM_SIZE_INT *) place = (SUM_SIZE_INT) byte_value;
  return 1;
}

/* Store the value of VAL to *OUT.  The value is a time period, by
   default expressed in seconds, but also accepting suffixes "m", "h",
   "d", and "w" for minutes, hours, days, and weeks respectively.  */

static int
cmd_time (const char *com, const char *val, void *place)
{
  double number, mult;
  const char *end = val + strlen (val);

  /* Strip trailing whitespace.  */
  while (val < end && ISSPACE (end[-1]))
    --end;

  if (val == end)
    {
    err:
      fprintf (stderr, _("%s: %s: Invalid time period `%s'\n"),
	       exec_name, com, val);
      return 0;
    }

  switch (TOLOWER (end[-1]))
    {
    case 's':
      --end, mult = 1;		/* seconds */
      break;
    case 'm':
      --end, mult = 60;		/* minutes */
      break;
    case 'h':
      --end, mult = 3600;	/* hours */
      break;
    case 'd':
      --end, mult = 86400.0;	/* days */
      break;
    case 'w':
      --end, mult = 604800.0;	/* weeks */
      break;
    default:
      /* Not a recognized suffix: assume it belongs to the number.
	 (If not, simple_atof will raise an error.)  */
      mult = 1;
    }

  /* Skip leading and trailing whitespace. */
  while (val < end && ISSPACE (*val))
    ++val;
  while (val < end && ISSPACE (end[-1]))
    --end;
  if (val == end)
    goto err;

  if (!simple_atof (val, end, &number))
    goto err;

  *(double *)place = number * mult;
  return 1;
}

#ifdef HAVE_SSL
static int
cmd_cert_type (const char *com, const char *val, void *place)
{
  static const struct decode_item choices[] = {
    { "pem", keyfile_pem },
    { "der", keyfile_asn1 },
    { "asn1", keyfile_asn1 },
  };
  int ok = decode_string (val, choices, countof (choices), place);
  if (!ok)
    fprintf (stderr, _("%s: %s: Invalid value `%s'.\n"), exec_name, com, val);
  return ok;
}
#endif

/* Specialized helper functions, used by `commands' to handle some
   options specially.  */

static int check_user_specified_header PARAMS ((const char *));

static int
cmd_spec_dirstruct (const char *com, const char *val, void *place_ignored)
{
  if (!cmd_boolean (com, val, &opt.dirstruct))
    return 0;
  /* Since dirstruct behaviour is explicitly changed, no_dirstruct
     must be affected inversely.  */
  if (opt.dirstruct)
    opt.no_dirstruct = 0;
  else
    opt.no_dirstruct = 1;
  return 1;
}

static int
cmd_spec_header (const char *com, const char *val, void *place_ignored)
{
  /* Empty value means reset the list of headers. */
  if (*val == '\0')
    {
      free_vec (opt.user_headers);
      opt.user_headers = NULL;
      return 1;
    }

  if (!check_user_specified_header (val))
    {
      fprintf (stderr, _("%s: %s: Invalid header `%s'.\n"),
	       exec_name, com, val);
      return 0;
    }
  opt.user_headers = vec_append (opt.user_headers, val);
  return 1;
}

static int
cmd_spec_htmlify (const char *com, const char *val, void *place_ignored)
{
  int flag = cmd_boolean (com, val, &opt.htmlify);
  if (flag && !opt.htmlify)
    opt.remove_listing = 0;
  return flag;
}

/* Set the "mirror" mode.  It means: recursive download, timestamping,
   no limit on max. recursion depth, and don't remove listings.  */

static int
cmd_spec_mirror (const char *com, const char *val, void *place_ignored)
{
  int mirror;

  if (!cmd_boolean (com, val, &mirror))
    return 0;
  if (mirror)
    {
      opt.recursive = 1;
      if (!opt.no_dirstruct)
	opt.dirstruct = 1;
      opt.timestamping = 1;
      opt.reclevel = INFINITE_RECURSION;
      opt.remove_listing = 0;
    }
  return 1;
}

/* Validate --prefer-family and set the choice.  Allowed values are
   "IPv4", "IPv6", and "none".  */

static int
cmd_spec_prefer_family (const char *com, const char *val, void *place_ignored)
{
  static const struct decode_item choices[] = {
    { "IPv4", prefer_ipv4 },
    { "IPv6", prefer_ipv6 },
    { "none", prefer_none },
  };
  int ok = decode_string (val, choices, countof (choices),
			  (int *) &opt.prefer_family);
  if (!ok)
    fprintf (stderr, _("%s: %s: Invalid value `%s'.\n"), exec_name, com, val);
  return ok;
}

/* Set progress.type to VAL, but verify that it's a valid progress
   implementation before that.  */

static int
cmd_spec_progress (const char *com, const char *val, void *place_ignored)
{
  if (!valid_progress_implementation_p (val))
    {
      fprintf (stderr, _("%s: %s: Invalid progress type `%s'.\n"),
	       exec_name, com, val);
      return 0;
    }
  xfree_null (opt.progress_type);

  /* Don't call set_progress_implementation here.  It will be called
     in main() when it becomes clear what the log output is.  */
  opt.progress_type = xstrdup (val);
  return 1;
}

/* Set opt.recursive to VAL as with cmd_boolean.  If opt.recursive is
   set to true, also set opt.dirstruct to 1, unless opt.no_dirstruct
   is specified.  */

static int
cmd_spec_recursive (const char *com, const char *val, void *place_ignored)
{
  if (!cmd_boolean (com, val, &opt.recursive))
    return 0;
  else
    {
      if (opt.recursive && !opt.no_dirstruct)
	opt.dirstruct = 1;
    }
  return 1;
}

static int
cmd_spec_restrict_file_names (const char *com, const char *val, void *place_ignored)
{
  int restrict_os = opt.restrict_files_os;
  int restrict_ctrl = opt.restrict_files_ctrl;

  const char *end = strchr (val, ',');
  if (!end)
    end = val + strlen (val);

#define VAL_IS(string_literal) BOUNDED_EQUAL (val, end, string_literal)

  if (VAL_IS ("unix"))
    restrict_os = restrict_unix;
  else if (VAL_IS ("windows"))
    restrict_os = restrict_windows;
  else if (VAL_IS ("nocontrol"))
    restrict_ctrl = 0;
  else
    {
    err:
      fprintf (stderr,
	       _("%s: %s: Invalid restriction `%s', use `unix' or `windows'.\n"),
	       exec_name, com, val);
      return 0;
    }

#undef VAL_IS

  if (*end)
    {
      if (!strcmp (end + 1, "nocontrol"))
	restrict_ctrl = 0;
      else
	goto err;
    }

  opt.restrict_files_os = restrict_os;
  opt.restrict_files_ctrl = restrict_ctrl;
  return 1;
}

#ifdef HAVE_SSL
static int
cmd_spec_secure_protocol (const char *com, const char *val, void *place)
{
  static const struct decode_item choices[] = {
    { "auto", secure_protocol_auto },
    { "sslv2", secure_protocol_sslv2 },
    { "sslv3", secure_protocol_sslv3 },
    { "tlsv1", secure_protocol_tlsv1 },
  };
  int ok = decode_string (val, choices, countof (choices), place);
  if (!ok)
    fprintf (stderr, _("%s: %s: Invalid value `%s'.\n"), exec_name, com, val);
  return ok;
}
#endif

/* Set all three timeout values. */

static int
cmd_spec_timeout (const char *com, const char *val, void *place_ignored)
{
  double value;
  if (!cmd_time (com, val, &value))
    return 0;
  opt.read_timeout = value;
  opt.connect_timeout = value;
  opt.dns_timeout = value;
  return 1;
}

static int
cmd_spec_useragent (const char *com, const char *val, void *place_ignored)
{
  /* Disallow embedded newlines.  */
  if (strchr (val, '\n'))
    {
      fprintf (stderr, _("%s: %s: Invalid value `%s'.\n"),
	       exec_name, com, val);
      return 0;
    }
  xfree_null (opt.useragent);
  opt.useragent = xstrdup (val);
  return 1;
}

/* Miscellaneous useful routines.  */

/* A very simple atoi clone, more useful than atoi because it works on
   delimited strings, and has error reportage.  Returns 1 on success,
   0 on failure.  If successful, stores result to *DEST.  */

static int
simple_atoi (const char *beg, const char *end, int *dest)
{
  int result = 0;
  int negative = 0;
  const char *p = beg;

  while (p < end && ISSPACE (*p))
    ++p;
  if (p < end && (*p == '-' || *p == '+'))
    {
      negative = (*p == '-');
      ++p;
    }
  if (p == end)
    return 0;

  /* Read negative numbers in a separate loop because the most
     negative integer cannot be represented as a positive number.  */

  if (!negative)
    for (; p < end && ISDIGIT (*p); p++)
      {
	int next = (10 * result) + (*p - '0');
	if (next < result)
	  return 0;		/* overflow */
	result = next;
      }
  else
    for (; p < end && ISDIGIT (*p); p++)
      {
	int next = (10 * result) - (*p - '0');
	if (next > result)
	  return 0;		/* underflow */
	result = next;
      }

  if (p != end)
    return 0;

  *dest = result;
  return 1;
}

/* Trivial atof, with error reporting.  Handles "<digits>[.<digits>]",
   doesn't handle exponential notation.  Returns 1 on success, 0 on
   failure.  In case of success, stores its result to *DEST.  */

static int
simple_atof (const char *beg, const char *end, double *dest)
{
  double result = 0;

  int negative = 0;
  int seen_dot = 0;
  int seen_digit = 0;
  double divider = 1;

  const char *p = beg;

  while (p < end && ISSPACE (*p))
    ++p;
  if (p < end && (*p == '-' || *p == '+'))
    {
      negative = (*p == '-');
      ++p;
    }

  for (; p < end; p++)
    {
      char ch = *p;
      if (ISDIGIT (ch))
	{
	  if (!seen_dot)
	    result = (10 * result) + (ch - '0');
	  else
	    result += (ch - '0') / (divider *= 10);
	  seen_digit = 1;
	}
      else if (ch == '.')
	{
	  if (!seen_dot)
	    seen_dot = 1;
	  else
	    return 0;
	}
      else
	return 0;
    }
  if (!seen_digit)
    return 0;
  if (negative)
    result = -result;

  *dest = result;
  return 1;
}

/* Verify that the user-specified header in S is valid.  It must
   contain a colon preceded by non-white-space characters and must not
   contain newlines.  */

static int
check_user_specified_header (const char *s)
{
  const char *p;

  for (p = s; *p && *p != ':' && !ISSPACE (*p); p++);
  /* The header MUST contain `:' preceded by at least one
     non-whitespace character.  */
  if (*p != ':' || p == s)
    return 0;
  /* The header MUST NOT contain newlines.  */
  if (strchr (s, '\n'))
    return 0;
  return 1;
}

/* Decode VAL into a number, according to ITEMS. */

static int
decode_string (const char *val, const struct decode_item *items, int itemcount,
	       int *place)
{
  int i;
  for (i = 0; i < itemcount; i++)
    if (0 == strcasecmp (val, items[i].name))
      {
	*place = items[i].code;
	return 1;
      }
  return 0;
}


void cleanup_html_url PARAMS ((void));
void http_cleanup PARAMS ((void));


/* Free the memory allocated by global variables.  */
void
cleanup (void)
{
  /* Free external resources, close files, etc. */

  {
    extern FILE *output_stream;
    if (output_stream)
      fclose (output_stream);
    /* No need to check for error because Wget flushes its output (and
       checks for errors) after any data arrives.  */
  }

  /* We're exiting anyway so there's no real need to call free()
     hundreds of times.  Skipping the frees will make Wget exit
     faster.

     However, when detecting leaks, it's crucial to free() everything
     because then you can find the real leaks, i.e. the allocated
     memory which grows with the size of the program.  */

#ifdef DEBUG_MALLOC
  convert_cleanup ();
  res_cleanup ();
  http_cleanup ();
  cleanup_html_url ();
  host_cleanup ();
  log_cleanup ();

  {
    extern acc_t *netrc_list;
    free_netrc (netrc_list);
  }
  xfree_null (opt.lfilename);
  xfree_null (opt.dir_prefix);
  xfree_null (opt.input_filename);
  xfree_null (opt.output_document);
  free_vec (opt.accepts);
  free_vec (opt.rejects);
  free_vec (opt.excludes);
  free_vec (opt.includes);
  free_vec (opt.domains);
  free_vec (opt.follow_tags);
  free_vec (opt.ignore_tags);
  xfree_null (opt.progress_type);
  xfree_null (opt.ftp_user);
  xfree_null (opt.ftp_passwd);
  xfree_null (opt.ftp_proxy);
  xfree_null (opt.https_proxy);
  xfree_null (opt.http_proxy);
  free_vec (opt.no_proxy);
  xfree_null (opt.useragent);
  xfree_null (opt.referer);
  xfree_null (opt.http_user);
  xfree_null (opt.http_passwd);
  free_vec (opt.user_headers);
# ifdef HAVE_SSL
  xfree_null (opt.cert_file);
  xfree_null (opt.private_key);
  xfree_null (opt.ca_directory);
  xfree_null (opt.ca_cert);
  xfree_null (opt.random_file);
  xfree_null (opt.egd_file);
# endif
  xfree_null (opt.bind_address);
  xfree_null (opt.cookies_input);
  xfree_null (opt.cookies_output);
  xfree_null (opt.user);
  xfree_null (opt.passwd);
#endif /* DEBUG_MALLOC */
}