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/*
Copyright (C) 1997,98,99,2002 Free Software Foundation, Inc.
Written by Thomas Bushnell, n/BSG.
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 <string.h>
#include <error.h>
#include <argp.h>
#include <version.h>
#include <limits.h>
#include "isofs.h"
struct node *diskfs_root_node;
struct store *store = 0;
struct store_parsed *store_parsed = 0;
char *diskfs_disk_name = 0;
char *diskfs_server_name = "iso9660fs";
char *diskfs_server_version = HURD_VERSION;
char *diskfs_extra_version = "GNU Hurd";
int diskfs_synchronous = 0;
int diskfs_link_max = INT_MAX;
int diskfs_name_max = 255; /* see iso9660.h: struct dirrect::namelen */
int diskfs_maxsymlinks = 8;
/* Fetch the root node */
static void
fetch_root ()
{
struct lookup_context ctx;
ino_t id;
error_t err;
ctx.dr = (struct dirrect *) sblock->root;
/* First check for SUSP and all relevant extensions */
rrip_initialize (ctx.dr);
/* Now rescan the node for real */
rrip_lookup (ctx.dr, &ctx.rr, 1);
err = cache_id (ctx.dr, &ctx.rr, &id);
assert_perror (err);
/* And fetch the node. */
err = diskfs_cached_lookup_context (id, &diskfs_root_node, &ctx);
assert_perror (err);
pthread_mutex_unlock (&diskfs_root_node->lock);
}
/* Find and read the superblock. */
static void
read_sblock ()
{
struct voldesc *vd;
error_t err;
struct sblock * volatile sb = 0;
err = diskfs_catch_exception ();
if (err)
error (4, err, "reading superblock");
/* Start at logical sector 16 and keep going until
we find a matching superblock */
for (vd = disk_image + (logical_sector_size * 16);
(void *) vd < disk_image + (logical_sector_size * 500); /* for sanity */
vd = (void *) vd + logical_sector_size)
{
if (vd->type == VOLDESC_END)
break;
if (vd->type == VOLDESC_PRIMARY
&& !memcmp (ISO_STANDARD_ID, vd->id, 5)
&& vd->version == 1)
{
/* Here's a valid primary descriptor. */
sb = (struct sblock *) vd;
break;
}
}
if (!sb)
error (1, 0, "Could not find valid superblock");
sblock = malloc (sizeof (struct sblock));
if (!sblock)
error (1, errno, "Could not allocate memory for superblock");
memcpy (sblock, sb, sizeof (struct sblock));
diskfs_end_catch_exception ();
/* Parse some important bits of this */
logical_block_size = isonum_723 (sblock->blksize);
}
/* Override the standard diskfs routine so we can add our own output. */
error_t
diskfs_append_args (char **argz, size_t *argz_len)
{
error_t err;
/* Get the standard things. */
err = diskfs_append_std_options (argz, argz_len);
if (! err)
err = store_parsed_append_args (store_parsed, argz, argz_len);
return err;
}
int
main (int argc, char **argv)
{
mach_port_t bootstrap;
/* This filesystem is never capable of writing. */
diskfs_readonly = 1;
diskfs_hard_readonly = 1;
/* Initialize the diskfs library, parse arguments, and open the store.
This starts the first diskfs thread for us. */
store = diskfs_init_main (NULL, argc, argv, &store_parsed, &bootstrap);
create_disk_pager ();
read_sblock ();
fetch_root ();
diskfs_startup_diskfs (bootstrap, 0);
pthread_exit (NULL);
return 0;
}
/* Nothing to do for read-only medium */
error_t
diskfs_reload_global_state ()
{
return 0;
}
error_t
diskfs_set_hypermetadata (int wait, int clean)
{
return 0;
}
void
diskfs_readonly_changed (int readonly)
{
/* We should never get here because we set diskfs_hard_readonly above. */
abort ();
}
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