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/* Gopher filesystem. Argument handling routines.
Copyright (C) 2001, 2002 James A. Morrison <ja2morri@uwaterloo.ca>
Copyright (C) 2000 Igor Khavkine <igor@twu.net>
Gopherfs is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
Gopherfs is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include <string.h>
#include <limits.h>
#include <unistd.h>
#include <error.h>
#include <stdio.h>
#include <argp.h>
#include <argz.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <hurd/netfs.h>
#include "gopherfs.h"
/* ARGP data */
const char *argp_program_version = GOPHER_SERVER_NAME " " GOPHER_SERVER_VERSION;
const char *argp_program_bug_address = "ja2morri@uwaterloo.ca";
char args_doc[] = "SERVER [REMOTE_FS]";
char doc[] = "Hurd gopher filesystem translator";
static const struct argp_option options[] = {
{"port", 'P', "NUMBER", 0, "Specify a non-standard port"},
{"debug", 'D', "FILE", 0, "Print debug output to FILE"},
{0}
};
/* the function that groks the arguments and fills
* global options
*/
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
struct gopherfs_params *params = state->input;
error_t err = 0;
FILE *debug_stream = NULL;
char *tail;
switch (key)
{
case 'D':
if (arg)
{
debug_stream = fopen (arg, "w+");
if (! debug_stream)
{
err = errno;
argp_failure (state, 0, errno, "Cannot open debugging file %s", arg);
}
}
else
debug_stream = stderr;
if (!err)
debug_init (debug_stream);
break;
case 'P':
params->port = (unsigned short) strtol (arg, &tail, 10);
if (tail == arg || params->port > USHRT_MAX)
{
/* XXX bad integer conversion */
error (1, errno, "bad port number");
}
break;
case ARGP_KEY_ARG:
if (state->arg_num == 0)
{
params->dir = "";
params->server = arg;
}
else if (state->arg_num == 1)
{
params->dir = arg;
}
else
return ARGP_ERR_UNKNOWN;
break;
case ARGP_KEY_SUCCESS:
if (state->arg_num == 0)
argp_error (state, "No remote filesystem specified");
else
{
/* No port was provided. Get gopher default port. */
if (params->port == 0)
{
struct servent *se = getservbyname ("gopher", "tcp");
if (! se)
argp_error (state, "Couldn't get gopher port");
params->port = ntohs(se->s_port);
}
/* Check if the given address resolves. */
error_t err;
struct addrinfo *addr;
err = lookup_host (params->server, params->port, &addr);
if (err)
argp_failure (state, 10, 0, "%s: %s", params->server, gai_strerror (err));
}
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static struct argp_child argp_children[] = { {&netfs_std_startup_argp}, {0} };
static struct argp parser =
{ options, parse_opt, args_doc, doc, argp_children };
/* Used by netfs_set_options to handle runtime option parsing. */
struct argp *netfs_runtime_argp = &parser;
/* maybe overwrite this some time later */
error_t netfs_append_args (char **argz, size_t * argz_len);
/* handle all initial parameter parsing */
error_t
gopherfs_parse_args (int argc, char **argv, struct gopherfs_params *params)
{
return argp_parse (&parser, argc, argv, 0, 0, params);
}
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