/* syncfs -- User interface to file_syncfs, synchronize filesystems.
   Copyright (C) 1994, 95, 96, 97, 98 Free Software Foundation, Inc.

   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 <hurd.h>
#include <argp.h>
#include <error.h>
#include <version.h>

const char *argp_program_version = STANDARD_HURD_VERSION (sync);

static int synchronous = 1, do_children = 1;

static void
sync_one (const char *name, file_t port)
{
  error_t err = (port == MACH_PORT_NULL ? errno
		 : file_syncfs (port, synchronous, do_children));
  if (err)
    error (1, err, "%s", name);
}

static error_t
parser (int key, char *arg, struct argp_state *state)
{
  switch (key)
    {
    case 'a': synchronous = 0; break;
    case 'c': do_children = 0; break;

    case ARGP_KEY_NO_ARGS:
      sync_one ("/", getcrdir ());
      break;

    case ARGP_KEY_ARG:
      sync_one (arg, file_name_lookup (arg, 0, 0));
      break;

    default:
      return ARGP_ERR_UNKNOWN;
    }
  return 0;
}


int
main (int argc, char *argv[])
{
  static struct argp_option options[] =
  {
    {"asynchronous", 'a', 0, 0, "Do not wait for completion"},
    {"no-children", 'c', 0, 0, "Do not synchronize child filesystems"},
    {0}
  };
  struct argp argp =
  {options, parser,
   "[FILE...]", "Force all pending disk writes to be done immediately"
   "\vThe filesystem containing each FILE is synchronized, and its child"
   " filesystems unless --no-children is specified.  With no FILE argument"
   " synchronizes the root filesystem."};

  argp_parse (&argp, argc, argv, 0, 0, 0);

  return 0;
}