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/* Main entry point for the ext2 file system translator
Copyright (C) 1994,95,96,97,98,99,2002 Free Software Foundation, Inc.
Converted for ext2fs by Miles Bader <miles@gnu.ai.mit.edu>
This program 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.
This program 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 <stdarg.h>
#include <stdio.h>
#include <device/device.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <error.h>
#include <argz.h>
#include <argp.h>
#include <hurd/store.h>
#include <version.h>
#include "ext2fs.h"
/* ---------------------------------------------------------------- */
int diskfs_link_max = EXT2_LINK_MAX;
int diskfs_name_max = EXT2_NAME_LEN;
int diskfs_maxsymlinks = 8;
int diskfs_shortcut_symlink = 1;
int diskfs_shortcut_chrdev = 1;
int diskfs_shortcut_blkdev = 1;
int diskfs_shortcut_fifo = 1;
int diskfs_shortcut_ifsock = 1;
char *diskfs_server_name = "ext2fs";
char *diskfs_server_version = HURD_VERSION;
char *diskfs_extra_version = "GNU Hurd; ext2 " EXT2FS_VERSION;
int diskfs_synchronous;
struct node *diskfs_root_node;
struct store *store;
struct store_parsed *store_parsed;
char *diskfs_disk_name;
#ifdef EXT2FS_DEBUG
int ext2_debug_flag;
#endif
/* Ext2fs-specific options. */
static const struct argp_option
options[] =
{
{"debug", 'D', 0, 0, "Toggle debugging output"
#ifndef EXT2FS_DEBUG
" (not compiled in)"
#endif
},
{"sblock", 'S', "BLOCKNO", 0,
"Use alternate superblock location (1kb blocks)"},
{0}
};
/* Parse a command line option. */
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
/* We save our parsed values in this structure, hung off STATE->hook.
Only after parsing all options successfully will we use these values. */
struct
{
int debug_flag;
unsigned int sb_block;
} *values = state->hook;
switch (key)
{
case 'D':
values->debug_flag = 1;
break;
case 'S':
values->sb_block = strtoul (arg, &arg, 0);
if (!arg || *arg != '\0')
{
argp_error (state, "invalid number for --sblock");
return EINVAL;
}
break;
case ARGP_KEY_INIT:
state->child_inputs[0] = state->input;
values = malloc (sizeof *values);
if (values == 0)
return ENOMEM;
state->hook = values;
bzero (values, sizeof *values);
values->sb_block = SBLOCK_BLOCK;
break;
case ARGP_KEY_SUCCESS:
/* All options parse successfully, so implement ours if possible. */
if (values->debug_flag)
{
#ifdef EXT2FS_DEBUG
ext2_debug_flag = !ext2_debug_flag;
#else
argp_failure (state, 2, 0, "debugging support not compiled in");
return EINVAL;
#endif
}
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
/* 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);
#ifdef EXT2FS_DEBUG
if (!err && ext2_debug_flag)
err = argz_add (argz, argz_len, "--debug");
#endif
if (! err)
err = store_parsed_append_args (store_parsed, argz, argz_len);
return err;
}
/* Add our startup arguments to the standard diskfs set. */
static const struct argp_child startup_children[] =
{{&diskfs_store_startup_argp}, {0}};
static struct argp startup_argp = {options, parse_opt, 0, 0, startup_children};
/* Similarly at runtime. */
static const struct argp_child runtime_children[] =
{{&diskfs_std_runtime_argp}, {0}};
static struct argp runtime_argp = {options, parse_opt, 0, 0, runtime_children};
struct argp *diskfs_runtime_argp = (struct argp *)&runtime_argp;
int
main (int argc, char **argv)
{
error_t err;
mach_port_t bootstrap;
/* Initialize the diskfs library, parse arguments, and open the store.
This starts the first diskfs thread for us. */
store = diskfs_init_main (&startup_argp, argc, argv,
&store_parsed, &bootstrap);
if (store->size < SBLOCK_OFFS + SBLOCK_SIZE)
ext2_panic ("device too small for superblock (%Ld bytes)", store->size);
if (store->log2_blocks_per_page < 0)
ext2_panic ("device block size (%zu) greater than page size (%zd)",
store->block_size, vm_page_size);
/* Map the entire disk. */
create_disk_pager ();
pokel_init (&global_pokel, diskfs_disk_pager, disk_image);
get_hypermetadata();
inode_init ();
/* Set diskfs_root_node to the root inode. */
err = diskfs_cached_lookup (EXT2_ROOT_INO, &diskfs_root_node);
if (err)
ext2_panic ("can't get root: %s", strerror (err));
else if ((diskfs_root_node->dn_stat.st_mode & S_IFMT) == 0)
ext2_panic ("no root node!");
pthread_mutex_unlock (&diskfs_root_node->lock);
/* Now that we are all set up to handle requests, and diskfs_root_node is
set properly, it is safe to export our fsys control port to the
outside world. */
diskfs_startup_diskfs (bootstrap, 0);
/* and so we die, leaving others to do the real work. */
pthread_exit (NULL);
/* NOTREACHED */
return 0;
}
error_t
diskfs_reload_global_state ()
{
pokel_flush (&global_pokel);
pager_flush (diskfs_disk_pager, 1);
get_hypermetadata ();
return 0;
}
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