/* Standard startup-time command line parser

   Copyright (C) 1995 Free Software Foundation, Inc.

   Written by Miles Bader <miles@gnu.ai.mit.edu>

   This file is part of the GNU Hurd.

   The GNU Hurd 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.

   The GNU Hurd 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., 675 Mass Ave, Cambridge, MA 02139, USA. */

#include <stdio.h>
#include <argp.h>
#include "priv.h"

char *diskfs_boot_flags = 0;

extern char **diskfs_argv;

mach_port_t diskfs_exec_server_task = MACH_PORT_NULL;

/* ---------------------------------------------------------------- */

#define OPT_HOST_PRIV_PORT	(-1)
#define OPT_DEVICE_MASTER_PORT	(-2)
#define OPT_EXEC_SERVER_TASK	(-3)
#define OPT_BOOTFLAGS		(-4)

static struct argp_option
startup_options[] =
{
  {"readonly", 'r', 0, 0, "Never write to disk or allow opens for writing"},
  {"rdonly",   0,   0, OPTION_ALIAS | OPTION_HIDDEN},
  {"writable", 'w', 0, 0, "Use normal read/write behavior"},
  {"rdwr",     0,   0, OPTION_ALIAS | OPTION_HIDDEN},
  {"sync",     's', "INTERVAL", OPTION_ARG_OPTIONAL,
     "If INTERVAL is supplied, sync all data not actually written to disk"
     " every INTERVAL seconds, otherwise operate in synchronous mode (the"
     " default is to sync every 30 seconds)"},
  {"nosync",  'n',  0, 0, "Don't automatically sync data to disk"},
  {"version", 'V'},

  {"host-priv-port",     OPT_HOST_PRIV_PORT,     "PORT"},
  {"device-master-port", OPT_DEVICE_MASTER_PORT, "PORT"},
  {"exec-server-task",   OPT_EXEC_SERVER_TASK,   "PORT"},
  {"bootflags",          OPT_BOOTFLAGS,          "FLAGS"},

  {0, 0, 0, 0}
};

static error_t
parse_startup_opt (int opt, char *arg, struct argp_state *state)
{
  switch (opt)
    {
    case 'r':
      diskfs_readonly = 1; break;
    case 'w':
      diskfs_readonly = 0; break;
    case 's':
      if (arg == NULL)
	diskfs_synchronous = 1;
      else
	diskfs_default_sync_interval = atoi (arg);
      break;
    case 'n':
      diskfs_synchronous = 0;
      diskfs_default_sync_interval = 0;
      break;
    case 'V':
      printf("%s %d.%d.%d\n", diskfs_server_name, diskfs_major_version,
	     diskfs_minor_version, diskfs_edit_version);
      exit(0);

      /* Boot options */
    case OPT_DEVICE_MASTER_PORT:
      _hurd_device_master = atoi (arg); break;
    case OPT_HOST_PRIV_PORT:
      _hurd_host_priv = atoi (arg); break;
    case OPT_EXEC_SERVER_TASK:
      diskfs_exec_server_task = atoi (arg); break;
    case OPT_BOOTFLAGS:
      diskfs_boot_flags = arg; break;

    case ARGP_KEY_END:
      diskfs_argv = state->argv; break;

    default:
      return EINVAL;
    }

  return 0;
}

/* This may be used with argp_parse to parse standard diskfs startup
   options, possible chained onto the end of a user argp structure.  */
static struct argp startup_argp =
  { startup_options, parse_startup_opt };

struct argp *diskfs_startup_argp = &startup_argp;

/* ---------------------------------------------------------------- */

int diskfs_use_mach_device = 0;
char *diskfs_device_arg = 0;

static struct argp_option
dev_startup_options[] =
{
  {"machdev", 'm', 0, 0, "DEVICE is a mach device, not a file"},
  {0, 0}
};

static error_t
parse_dev_startup_opt (int opt, char *arg, struct argp_state *state)
{
  switch (opt)
    {
    case 'm':
      diskfs_use_mach_device = 1;
      break;
    case ARGP_KEY_ARG:
      diskfs_device_arg = arg;
      break;

    case ARGP_KEY_END:
      if (diskfs_boot_flags)
	diskfs_use_mach_device = 1; /* Can't do much else... */
      break;

    case ARGP_KEY_NO_ARGS:
      fprintf (stderr, "%s: No device specified\n", program_invocation_name);
      argp_help (state->argp, stderr, ARGP_HELP_STD_ERR); /* exits */

    default: return EINVAL;
    }

  return 0;
}

static struct argp *dev_startup_argp_parents[] = { &startup_argp, 0 };
static struct argp dev_startup_argp =
  { dev_startup_options, parse_dev_startup_opt, "DEVICE", 0,
      &dev_startup_argp_parents };

struct argp *diskfs_device_startup_argp = &dev_startup_argp;