/* Write a store to stdout

   Copyright (C) 1996, 1997 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.,
   59 Temple Place - Suite 330, Boston, MA 02111, USA. */

#include <unistd.h>
#include <argp.h>
#include <error.h>

#include <hurd/store.h>

int
main (int argc, char **argv)
{
  error_t err;
  struct store *s;
  char *name;
  off_t addr;
  size_t left;
  const struct argp_child kids[] = { { &store_argp }, { 0 }};
  struct argp argp =
    { 0, 0, 0, "Write the contents of a store to stdout", kids };
  struct store_argp_params p = { 0 };

  argp_parse (&argp, argc, argv, 0, 0, &p);
  err = store_parsed_name (p.result, &name);
  if (err)
    error (2, err, "store_parsed_name");

  err = store_parsed_open (p.result, STORE_READONLY, &s);
  if (err)
    error (4, err, "%s", name);

  addr = 0;
  left = s->size;
  while (left > 0)
    {
      size_t read = left > 1024*1024 ? 1024*1024 : left;
      char buf[4096];
      void *data = buf;
      size_t data_len = sizeof (buf);
     
      err = store_read (s, addr, read, &data, &data_len);
      if (err)
	error (5, err, "%s", name);
      if (write (1, data, data_len) < 0)
	error (6, errno, "stdout");

      addr += data_len >> s->log2_block_size;
      left -= data_len;
    }

  exit (0);
}