Esempio n. 1
0
static void PRS(int argc, char *argv[])
{
	int		flush = 0;
	int		c;
#ifdef MTRACE
	extern void	*mallwatch;
#endif
	errcode_t	retval;

	setbuf(stdout, NULL);
	setbuf(stderr, NULL);
	initialize_ext2_error_table();

	if (argc && *argv)
		program_name = *argv;
	while ((c = getopt (argc, argv, "FI")) != EOF)
		switch (c) {
		case 'F':
			flush = 1;
			break;
		case 'I':
			inode_buffer_blocks = atoi(optarg);
			break;
		default:
			usage ();
		}
	device_name = argv[optind];
	if (flush) {
		int	fd = open(device_name, O_RDONLY, 0);

		if (fd < 0) {
			com_err("open", errno,
			    _("while opening %s for flushing"), device_name);
			exit(FSCK_ERROR);
		}
		if ((retval = ext2fs_sync_device(fd, 1))) {
			com_err("ext2fs_sync_device", retval,
				_("while trying to flush %s"), device_name);
			exit(FSCK_ERROR);
		}
		close(fd);
	}
}
int main (int argc, char ** argv)
{
	errcode_t	retval;
	ext2_filsys	fs;
	int		c;
	int		flags = 0;
	int		flush = 0;
	int		force = 0;
	int		io_flags = 0;
	int		force_min_size = 0;
	int		print_min_size = 0;
	int		fd, ret;
	blk64_t		new_size = 0;
	blk64_t		max_size = 0;
	blk64_t		min_size = 0;
	io_manager	io_ptr;
	char		*new_size_str = 0;
	int		use_stride = -1;
	ext2fs_struct_stat st_buf;
	__s64		new_file_size;
	unsigned int	sys_page_size = 4096;
	long		sysval;
	int		len, mount_flags;
	char		*mtpt;

#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	setlocale(LC_CTYPE, "");
	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	textdomain(NLS_CAT_NAME);
	set_com_err_gettext(gettext);
#endif

	add_error_table(&et_ext2_error_table);

	fprintf (stderr, "resize2fs %s (%s)\n",
		 E2FSPROGS_VERSION, E2FSPROGS_DATE);
	if (argc && *argv)
		program_name = *argv;

	while ((c = getopt (argc, argv, "d:fFhMPpS:")) != EOF) {
		switch (c) {
		case 'h':
			usage(program_name);
			break;
		case 'f':
			force = 1;
			break;
		case 'F':
			flush = 1;
			break;
		case 'M':
			force_min_size = 1;
			break;
		case 'P':
			print_min_size = 1;
			break;
		case 'd':
			flags |= atoi(optarg);
			break;
		case 'p':
			flags |= RESIZE_PERCENT_COMPLETE;
			break;
		case 'S':
			use_stride = atoi(optarg);
			break;
		default:
			usage(program_name);
		}
	}
	if (optind == argc)
		usage(program_name);

	device_name = argv[optind++];
	if (optind < argc)
		new_size_str = argv[optind++];
	if (optind < argc)
		usage(program_name);

	io_options = strchr(device_name, '?');
	if (io_options)
		*io_options++ = 0;

	/*
	 * Figure out whether or not the device is mounted, and if it is
	 * where it is mounted.
	 */
	len=80;
	while (1) {
		mtpt = malloc(len);
		if (!mtpt)
			return ENOMEM;
		mtpt[len-1] = 0;
		retval = ext2fs_check_mount_point(device_name, &mount_flags,
						  mtpt, len);
		if (retval) {
			com_err("ext2fs_check_mount_point", retval,
				_("while determining whether %s is mounted."),
				device_name);
			exit(1);
		}
		if (!(mount_flags & EXT2_MF_MOUNTED) || (mtpt[len-1] == 0))
			break;
		free(mtpt);
		len = 2 * len;
	}

	fd = ext2fs_open_file(device_name, O_RDWR, 0);
	if (fd < 0) {
		com_err("open", errno, _("while opening %s"),
			device_name);
		exit(1);
	}

	ret = ext2fs_fstat(fd, &st_buf);
	if (ret < 0) {
		com_err("open", errno,
			_("while getting stat information for %s"),
			device_name);
		exit(1);
	}

	if (flush) {
		retval = ext2fs_sync_device(fd, 1);
		if (retval) {
			com_err(argv[0], retval,
				_("while trying to flush %s"),
				device_name);
			exit(1);
		}
	}

	if (!S_ISREG(st_buf.st_mode )) {
		close(fd);
		fd = -1;
	}

#ifdef CONFIG_TESTIO_DEBUG
	if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
		io_ptr = test_io_manager;
		test_io_backing_manager = unix_io_manager;
	} else
#endif
		io_ptr = unix_io_manager;

	if (!(mount_flags & EXT2_MF_MOUNTED))
		io_flags = EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE;

	io_flags |= EXT2_FLAG_64BITS;

	retval = ext2fs_open2(device_name, io_options, io_flags,
			      0, 0, io_ptr, &fs);
	if (retval) {
		com_err (program_name, retval, _("while trying to open %s"),
			 device_name);
		printf (_("Couldn't find valid filesystem superblock.\n"));
		exit (1);
	}

	/*
	 * Check for compatibility with the feature sets.  We need to
	 * be more stringent than ext2fs_open().
	 */
	if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
		com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
			"(%s)", device_name);
		exit(1);
	}

	min_size = calculate_minimum_resize_size(fs);

	if (print_min_size) {
		if (!force && ((fs->super->s_state & EXT2_ERROR_FS) ||
			       ((fs->super->s_state & EXT2_VALID_FS) == 0))) {
			fprintf(stderr,
				_("Please run 'e2fsck -f %s' first.\n\n"),
				device_name);
			exit(1);
		}
		printf(_("Estimated minimum size of the filesystem: %llu\n"),
		       min_size);
		exit(0);
	}

	/* Determine the system page size if possible */
#ifdef HAVE_SYSCONF
#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
#define _SC_PAGESIZE _SC_PAGE_SIZE
#endif
#ifdef _SC_PAGESIZE
	sysval = sysconf(_SC_PAGESIZE);
	if (sysval > 0)
		sys_page_size = sysval;
#endif /* _SC_PAGESIZE */
#endif /* HAVE_SYSCONF */

	/*
	 * Get the size of the containing partition, and use this for
	 * defaults and for making sure the new filesystem doesn't
	 * exceed the partition size.
	 */
	retval = ext2fs_get_device_size2(device_name, fs->blocksize,
					 &max_size);
	if (retval) {
		com_err(program_name, retval,
			_("while trying to determine filesystem size"));
		exit(1);
	}
	if (force_min_size)
		new_size = min_size;
	else if (new_size_str) {
		new_size = parse_num_blocks2(new_size_str,
					     fs->super->s_log_block_size);
		if (new_size == 0) {
			com_err(program_name, 0,
				_("Invalid new size: %s\n"), new_size_str);
			exit(1);
		}
	} else {
		new_size = max_size;
		/* Round down to an even multiple of a pagesize */
		if (sys_page_size > fs->blocksize)
			new_size &= ~((sys_page_size / fs->blocksize)-1);
	}
	if (!EXT2_HAS_INCOMPAT_FEATURE(fs->super,
				       EXT4_FEATURE_INCOMPAT_64BIT)) {
		/* Take 16T down to 2^32-1 blocks */
		if (new_size == (1ULL << 32))
			new_size--;
		else if (new_size > (1ULL << 32)) {
			com_err(program_name, 0,
				_("New size too large to be "
				  "expressed in 32 bits\n"));
			exit(1);
		}
	}

	if (!force && new_size < min_size) {
		com_err(program_name, 0,
			_("New size smaller than minimum (%llu)\n"), min_size);
		exit(1);
	}
	if (use_stride >= 0) {
		if (use_stride >= (int) fs->super->s_blocks_per_group) {
			com_err(program_name, 0,
				_("Invalid stride length"));
			exit(1);
		}
		fs->stride = fs->super->s_raid_stride = use_stride;
		ext2fs_mark_super_dirty(fs);
	} else
		  determine_fs_stride(fs);

	/*
	 * If we are resizing a plain file, and it's not big enough,
	 * automatically extend it in a sparse fashion by writing the
	 * last requested block.
	 */
	new_file_size = ((__u64) new_size) * fs->blocksize;
	if ((__u64) new_file_size >
	    (((__u64) 1) << (sizeof(st_buf.st_size)*8 - 1)) - 1)
		fd = -1;
	if ((new_file_size > st_buf.st_size) &&
	    (fd > 0)) {
		if ((ext2fs_llseek(fd, new_file_size-1, SEEK_SET) >= 0) &&
		    (write(fd, "0", 1) == 1))
			max_size = new_size;
	}
	if (!force && (new_size > max_size)) {
		fprintf(stderr, _("The containing partition (or device)"
			" is only %llu (%dk) blocks.\nYou requested a new size"
			" of %llu blocks.\n\n"), max_size,
			fs->blocksize / 1024, new_size);
		exit(1);
	}
	if (new_size == ext2fs_blocks_count(fs->super)) {
		fprintf(stderr, _("The filesystem is already %llu blocks "
			"long.  Nothing to do!\n\n"), new_size);
		exit(0);
	}
	if (mount_flags & EXT2_MF_MOUNTED) {
		retval = online_resize_fs(fs, mtpt, &new_size, flags);
	} else {
		if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) ||
			       (fs->super->s_state & EXT2_ERROR_FS) ||
			       ((fs->super->s_state & EXT2_VALID_FS) == 0))) {
			fprintf(stderr,
				_("Please run 'e2fsck -f %s' first.\n\n"),
				device_name);
			exit(1);
		}
		/*
		 * XXXX The combination of flex_bg and !resize_inode
		 * causes major problems for resize2fs, since when the
		 * group descriptors grow in size this can potentially
		 * require multiple inode tables to be moved aside to
		 * make room, and resize2fs chokes rather badly in
		 * this scenario.  It's a rare combination, except
		 * when a filesystem is expanded more than a certain
		 * size, so for now, we'll just prohibit that
		 * combination.  This is something we should fix
		 * eventually, though.
		 */
		if ((fs->super->s_feature_incompat &
		     EXT4_FEATURE_INCOMPAT_FLEX_BG) &&
		    !(fs->super->s_feature_compat &
		      EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
			com_err(program_name, 0, _("%s: The combination of "
				"flex_bg and\n\t!resize_inode features "
				"is not supported by resize2fs.\n"),
				device_name);
			exit(1);
		}
		printf(_("Resizing the filesystem on "
			 "%s to %llu (%dk) blocks.\n"),
		       device_name, new_size, fs->blocksize / 1024);
		retval = resize_fs(fs, &new_size, flags,
				   ((flags & RESIZE_PERCENT_COMPLETE) ?
				    resize_progress_func : 0));
	}
	free(mtpt);
	if (retval) {
		com_err(program_name, retval, _("while trying to resize %s"),
			device_name);
		fprintf(stderr,
			_("Please run 'e2fsck -fy %s' to fix the filesystem\n"
			  "after the aborted resize operation.\n"),
			device_name);
		ext2fs_close(fs);
		exit(1);
	}
	printf(_("The filesystem on %s is now %llu blocks long.\n\n"),
	       device_name, new_size);

	if ((st_buf.st_size > new_file_size) &&
	    (fd > 0)) {
#ifdef HAVE_FTRUNCATE64
		retval = ftruncate64(fd, new_file_size);
#else
		retval = 0;
		/* Only truncate if new_file_size doesn't overflow off_t */
		if (((off_t) new_file_size) == new_file_size)
			retval = ftruncate(fd, (off_t) new_file_size);
#endif
		if (retval)
			com_err(program_name, retval,
				_("while trying to truncate %s"),
				device_name);
	}
	if (fd > 0)
		close(fd);
	remove_error_table(&et_ext2_error_table);
	return (0);
}
static errcode_t PRS(int argc, char *argv[], e2fsck_t *ret_ctx)
{
	int		flush = 0;
	int		c, fd;
#ifdef MTRACE
	extern void	*mallwatch;
#endif
	e2fsck_t	ctx;
	errcode_t	retval;
#ifdef HAVE_SIGNAL_H
	struct sigaction	sa;
#endif
	char		*extended_opts = 0;
	char		*cp;
	int 		res;		/* result of sscanf */
#ifdef CONFIG_JBD_DEBUG
	char 		*jbd_debug;
#endif

	retval = e2fsck_allocate_context(&ctx);
	if (retval)
		return retval;

	*ret_ctx = ctx;

	setvbuf(stdout, NULL, _IONBF, BUFSIZ);
	setvbuf(stderr, NULL, _IONBF, BUFSIZ);
	if (isatty(0) && isatty(1)) {
		ctx->interactive = 1;
	} else {
		ctx->start_meta[0] = '\001';
		ctx->stop_meta[0] = '\002';
	}
	memset(bar, '=', sizeof(bar)-1);
	memset(spaces, ' ', sizeof(spaces)-1);
	add_error_table(&et_ext2_error_table);
	add_error_table(&et_prof_error_table);
	blkid_get_cache(&ctx->blkid, NULL);

	if (argc && *argv)
		ctx->program_name = *argv;
	else
		ctx->program_name = "e2fsck";
	while ((c = getopt (argc, argv, "panyrcC:B:dE:fvtFVM:b:I:j:P:l:L:N:SsDk")) != EOF)
		switch (c) {
		case 'C':
			ctx->progress = e2fsck_update_progress;
			res = sscanf(optarg, "%d", &ctx->progress_fd);
			if (res != 1)
				goto sscanf_err;

			if (ctx->progress_fd < 0) {
				ctx->progress = 0;
				ctx->progress_fd = ctx->progress_fd * -1;
			}
			if (!ctx->progress_fd)
				break;
			/* Validate the file descriptor to avoid disasters */
			fd = dup(ctx->progress_fd);
			if (fd < 0) {
				fprintf(stderr,
				_("Error validating file descriptor %d: %s\n"),
					ctx->progress_fd,
					error_message(errno));
				fatal_error(ctx,
			_("Invalid completion information file descriptor"));
			} else
				close(fd);
			break;
		case 'D':
			ctx->options |= E2F_OPT_COMPRESS_DIRS;
			break;
		case 'E':
			extended_opts = optarg;
			break;
		case 'p':
		case 'a':
			if (ctx->options & (E2F_OPT_YES|E2F_OPT_NO)) {
			conflict_opt:
				fatal_error(ctx,
	_("Only one of the options -p/-a, -n or -y may be specified."));
			}
			ctx->options |= E2F_OPT_PREEN;
			break;
		case 'n':
			if (ctx->options & (E2F_OPT_YES|E2F_OPT_PREEN))
				goto conflict_opt;
			ctx->options |= E2F_OPT_NO;
			break;
		case 'y':
			if (ctx->options & (E2F_OPT_PREEN|E2F_OPT_NO))
				goto conflict_opt;
			ctx->options |= E2F_OPT_YES;
			break;
		case 't':
#ifdef RESOURCE_TRACK
			if (ctx->options & E2F_OPT_TIME)
				ctx->options |= E2F_OPT_TIME2;
			else
				ctx->options |= E2F_OPT_TIME;
#else
			fprintf(stderr, _("The -t option is not "
				"supported on this version of e2fsck.\n"));
#endif
			break;
		case 'c':
			if (cflag++)
				ctx->options |= E2F_OPT_WRITECHECK;
			ctx->options |= E2F_OPT_CHECKBLOCKS;
			break;
		case 'r':
			/* What we do by default, anyway! */
			break;
		case 'b':
			res = sscanf(optarg, "%u", &ctx->use_superblock);
			if (res != 1)
				goto sscanf_err;
			ctx->flags |= E2F_FLAG_SB_SPECIFIED;
			break;
		case 'B':
			ctx->blocksize = atoi(optarg);
			break;
		case 'I':
			res = sscanf(optarg, "%d", &ctx->inode_buffer_blocks);
			if (res != 1)
				goto sscanf_err;
			break;
		case 'j':
			ctx->journal_name = blkid_get_devname(ctx->blkid,
							      optarg, NULL);
			if (!ctx->journal_name) {
				com_err(ctx->program_name, 0,
					_("Unable to resolve '%s'"),
					optarg);
				fatal_error(ctx, 0);
			}
			break;
		case 'P':
			res = sscanf(optarg, "%d", &ctx->process_inode_size);
			if (res != 1)
				goto sscanf_err;
			break;
		case 'L':
			replace_bad_blocks++;
		case 'l':
			bad_blocks_file = string_copy(ctx, optarg, 0);
			break;
		case 'd':
			ctx->options |= E2F_OPT_DEBUG;
			break;
		case 'f':
			ctx->options |= E2F_OPT_FORCE;
			break;
		case 'F':
			flush = 1;
			break;
		case 'v':
			verbose = 1;
			break;
		case 'V':
			show_version_only = 1;
			break;
#ifdef MTRACE
		case 'M':
			mallwatch = (void *) strtol(optarg, NULL, 0);
			break;
#endif
		case 'N':
			ctx->device_name = string_copy(ctx, optarg, 0);
			break;
		case 'k':
			keep_bad_blocks++;
			break;
		default:
			usage(ctx);
		}
	if (show_version_only)
		return 0;
	if (optind != argc - 1)
		usage(ctx);
	if ((ctx->options & E2F_OPT_NO) &&
	    (ctx->options & E2F_OPT_COMPRESS_DIRS)) {
		com_err(ctx->program_name, 0,
			_("The -n and -D options are incompatible."));
		fatal_error(ctx, 0);
	}
	if ((ctx->options & E2F_OPT_NO) && cflag) {
		com_err(ctx->program_name, 0,
			_("The -n and -c options are incompatible."));
		fatal_error(ctx, 0);
	}
	if ((ctx->options & E2F_OPT_NO) && bad_blocks_file) {
		com_err(ctx->program_name, 0,
			_("The -n and -l/-L options are incompatible."));
		fatal_error(ctx, 0);
	}
	if (ctx->options & E2F_OPT_NO)
		ctx->options |= E2F_OPT_READONLY;

	ctx->io_options = strchr(argv[optind], '?');
	if (ctx->io_options)
		*ctx->io_options++ = 0;
	ctx->filesystem_name = blkid_get_devname(ctx->blkid, argv[optind], 0);
	if (!ctx->filesystem_name) {
		com_err(ctx->program_name, 0, _("Unable to resolve '%s'"),
			argv[optind]);
		fatal_error(ctx, 0);
	}
	if (extended_opts)
		parse_extended_opts(ctx, extended_opts);

	if ((cp = getenv("E2FSCK_CONFIG")) != NULL)
		config_fn[0] = cp;
	profile_set_syntax_err_cb(syntax_err_report);
	profile_init(config_fn, &ctx->profile);

	if (flush) {
		fd = open(ctx->filesystem_name, O_RDONLY, 0);
		if (fd < 0) {
			com_err("open", errno,
				_("while opening %s for flushing"),
				ctx->filesystem_name);
			fatal_error(ctx, 0);
		}
		if ((retval = ext2fs_sync_device(fd, 1))) {
			com_err("ext2fs_sync_device", retval,
				_("while trying to flush %s"),
				ctx->filesystem_name);
			fatal_error(ctx, 0);
		}
		close(fd);
	}
	if (cflag && bad_blocks_file) {
		fprintf(stderr, _("The -c and the -l/-L options may "
				  "not be both used at the same time.\n"));
		exit(FSCK_USAGE);
	}
#ifdef HAVE_SIGNAL_H
	/*
	 * Set up signal action
	 */
	memset(&sa, 0, sizeof(struct sigaction));
	sa.sa_handler = signal_cancel;
	sigaction(SIGINT, &sa, 0);
	sigaction(SIGTERM, &sa, 0);
#ifdef SA_RESTART
	sa.sa_flags = SA_RESTART;
#endif
	e2fsck_global_ctx = ctx;
	sa.sa_handler = signal_progress_on;
	sigaction(SIGUSR1, &sa, 0);
	sa.sa_handler = signal_progress_off;
	sigaction(SIGUSR2, &sa, 0);
#endif

	/* Update our PATH to include /sbin if we need to run badblocks  */
	if (cflag) {
		char *oldpath = getenv("PATH");
		char *newpath;
		int len = sizeof(PATH_SET) + 1;

		if (oldpath)
			len += strlen(oldpath);

		newpath = malloc(len);
		if (!newpath)
			fatal_error(ctx, "Couldn't malloc() newpath");
		strcpy(newpath, PATH_SET);

		if (oldpath) {
			strcat(newpath, ":");
			strcat(newpath, oldpath);
		}
		putenv(newpath);
	}
#ifdef CONFIG_JBD_DEBUG
	jbd_debug = getenv("E2FSCK_JBD_DEBUG");
	if (jbd_debug) {
		res = sscanf(jbd_debug, "%d", &journal_enable_debug);
		if (res != 1) {
			fprintf(stderr,
			        _("E2FSCK_JBD_DEBUG \"%s\" not an integer\n\n"),
			        jbd_debug);
			exit (1);
		}
	}
#endif
	return 0;

sscanf_err:
	fprintf(stderr, _("\nInvalid non-numeric argument to -%c (\"%s\")\n\n"),
	        c, optarg);
	exit (1);
}
Esempio n. 4
0
int main (int argc, char ** argv)
{
	errcode_t	retval;
	ext2_filsys	fs;
	int		c;
	int		flags = 0;
	int		flush = 0;
	int		force = 0;
	int		io_flags = 0;
	int		force_min_size = 0;
	int		print_min_size = 0;
	int		fd, ret;
	blk64_t		new_size = 0;
	blk64_t		max_size = 0;
	blk64_t		min_size = 0;
	io_manager	io_ptr;
	char		*new_size_str = 0;
	int		use_stride = -1;
	ext2fs_struct_stat st_buf;
	__s64		new_file_size;
	unsigned int	sys_page_size = 4096;
	unsigned int	blocksize;
	long		sysval;
	int		len, mount_flags;
	char		*mtpt, *undo_file = NULL;

#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	setlocale(LC_CTYPE, "");
	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	textdomain(NLS_CAT_NAME);
	set_com_err_gettext(gettext);
#endif

	add_error_table(&et_ext2_error_table);

	fprintf (stderr, "resize2fs %s (%s)\n",
		 E2FSPROGS_VERSION, E2FSPROGS_DATE);
	if (argc && *argv)
		program_name = *argv;

	while ((c = getopt(argc, argv, "d:fFhMPpS:bsz:")) != EOF) {
		switch (c) {
		case 'h':
			usage(program_name);
			break;
		case 'f':
			force = 1;
			break;
		case 'F':
			flush = 1;
			break;
		case 'M':
			force_min_size = 1;
			break;
		case 'P':
			print_min_size = 1;
			break;
		case 'd':
			flags |= atoi(optarg);
			break;
		case 'p':
			flags |= RESIZE_PERCENT_COMPLETE;
			break;
		case 'S':
			use_stride = atoi(optarg);
			break;
		case 'b':
			flags |= RESIZE_ENABLE_64BIT;
			break;
		case 's':
			flags |= RESIZE_DISABLE_64BIT;
			break;
		case 'z':
			undo_file = optarg;
			break;
		default:
			usage(program_name);
		}
	}
	if (optind == argc)
		usage(program_name);

	device_name = argv[optind++];
	if (optind < argc)
		new_size_str = argv[optind++];
	if (optind < argc)
		usage(program_name);

	io_options = strchr(device_name, '?');
	if (io_options)
		*io_options++ = 0;

	/*
	 * Figure out whether or not the device is mounted, and if it is
	 * where it is mounted.
	 */
	len=80;
	while (1) {
		mtpt = malloc(len);
		if (!mtpt)
			return ENOMEM;
		mtpt[len-1] = 0;
		retval = ext2fs_check_mount_point(device_name, &mount_flags,
						  mtpt, len);
		if (retval) {
			com_err("ext2fs_check_mount_point", retval,
				_("while determining whether %s is mounted."),
				device_name);
			exit(1);
		}
		if (!(mount_flags & EXT2_MF_MOUNTED) || (mtpt[len-1] == 0))
			break;
		free(mtpt);
		len = 2 * len;
	}

	fd = ext2fs_open_file(device_name, O_RDWR, 0);
	if (fd < 0) {
		com_err("open", errno, _("while opening %s"),
			device_name);
		exit(1);
	}

	ret = ext2fs_fstat(fd, &st_buf);
	if (ret < 0) {
		com_err("open", errno,
			_("while getting stat information for %s"),
			device_name);
		exit(1);
	}

	if (flush) {
		retval = ext2fs_sync_device(fd, 1);
		if (retval) {
			com_err(argv[0], retval,
				_("while trying to flush %s"),
				device_name);
			exit(1);
		}
	}

	if (!S_ISREG(st_buf.st_mode )) {
		close(fd);
		fd = -1;
	}

#ifdef CONFIG_TESTIO_DEBUG
	if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
		io_ptr = test_io_manager;
		test_io_backing_manager = unix_io_manager;
	} else
#endif
		io_ptr = unix_io_manager;

	if (!(mount_flags & EXT2_MF_MOUNTED))
		io_flags = EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE;

	io_flags |= EXT2_FLAG_64BITS;
	if (undo_file) {
		retval = resize2fs_setup_tdb(device_name, undo_file, &io_ptr);
		if (retval)
			exit(1);
	}
	retval = ext2fs_open2(device_name, io_options, io_flags,
			      0, 0, io_ptr, &fs);
	if (retval) {
		com_err(program_name, retval, _("while trying to open %s"),
			device_name);
		printf("%s", _("Couldn't find valid filesystem superblock.\n"));
		exit (1);
	}
	fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;

	/*
	 * Before acting on an unmounted filesystem, make sure it's ok,
	 * unless the user is forcing it.
	 *
	 * We do ERROR and VALID checks even if we're only printing the
	 * minimimum size, because traversal of a badly damaged filesystem
	 * can cause issues as well.  We don't require it to be fscked after
	 * the last mount time in this case, though, as this is a bit less
	 * risky.
	 */
	if (!force && !(mount_flags & EXT2_MF_MOUNTED)) {
		int checkit = 0;

		if (fs->super->s_state & EXT2_ERROR_FS)
			checkit = 1;

		if ((fs->super->s_state & EXT2_VALID_FS) == 0)
			checkit = 1;

		if ((fs->super->s_lastcheck < fs->super->s_mtime) &&
		    !print_min_size)
			checkit = 1;

		if (checkit) {
			fprintf(stderr,
				_("Please run 'e2fsck -f %s' first.\n\n"),
				device_name);
			exit(1);
		}
	}

	/*
	 * Check for compatibility with the feature sets.  We need to
	 * be more stringent than ext2fs_open().
	 */
	if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
		com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
			"(%s)", device_name);
		exit(1);
	}

	min_size = calculate_minimum_resize_size(fs, flags);

	if (print_min_size) {
		printf(_("Estimated minimum size of the filesystem: %llu\n"),
		       min_size);
		exit(0);
	}

	/* Determine the system page size if possible */
#ifdef HAVE_SYSCONF
#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
#define _SC_PAGESIZE _SC_PAGE_SIZE
#endif
#ifdef _SC_PAGESIZE
	sysval = sysconf(_SC_PAGESIZE);
	if (sysval > 0)
		sys_page_size = sysval;
#endif /* _SC_PAGESIZE */
#endif /* HAVE_SYSCONF */

	/*
	 * Get the size of the containing partition, and use this for
	 * defaults and for making sure the new filesystem doesn't
	 * exceed the partition size.
	 */
	blocksize = fs->blocksize;
	retval = ext2fs_get_device_size2(device_name, blocksize,
					 &max_size);
	if (retval) {
		com_err(program_name, retval, "%s",
			_("while trying to determine filesystem size"));
		exit(1);
	}
	if (force_min_size)
		new_size = min_size;
	else if (new_size_str) {
		new_size = parse_num_blocks2(new_size_str,
					     fs->super->s_log_block_size);
		if (new_size == 0) {
			com_err(program_name, 0,
				_("Invalid new size: %s\n"), new_size_str);
			exit(1);
		}
	} else {
		new_size = max_size;
		/* Round down to an even multiple of a pagesize */
		if (sys_page_size > blocksize)
			new_size &= ~((sys_page_size / blocksize)-1);
	}
	/* If changing 64bit, don't change the filesystem size. */
	if (flags & (RESIZE_DISABLE_64BIT | RESIZE_ENABLE_64BIT)) {
		new_size = ext2fs_blocks_count(fs->super);
	}
	if (!ext2fs_has_feature_64bit(fs->super)) {
		/* Take 16T down to 2^32-1 blocks */
		if (new_size == (1ULL << 32))
			new_size--;
		else if (new_size > (1ULL << 32)) {
			com_err(program_name, 0, "%s",
				_("New size too large to be "
				  "expressed in 32 bits\n"));
			exit(1);
		}
	}

	if (!force && new_size < min_size) {
		com_err(program_name, 0,
			_("New size smaller than minimum (%llu)\n"), min_size);
		exit(1);
	}
	if (use_stride >= 0) {
		if (use_stride >= (int) fs->super->s_blocks_per_group) {
			com_err(program_name, 0, "%s",
				_("Invalid stride length"));
			exit(1);
		}
		fs->stride = fs->super->s_raid_stride = use_stride;
		ext2fs_mark_super_dirty(fs);
	} else
		  determine_fs_stride(fs);

	/*
	 * If we are resizing a plain file, and it's not big enough,
	 * automatically extend it in a sparse fashion by writing the
	 * last requested block.
	 */
	new_file_size = ((__u64) new_size) * blocksize;
	if ((__u64) new_file_size >
	    (((__u64) 1) << (sizeof(st_buf.st_size)*8 - 1)) - 1)
		fd = -1;
	if ((new_file_size > st_buf.st_size) &&
	    (fd > 0)) {
		if ((ext2fs_llseek(fd, new_file_size-1, SEEK_SET) >= 0) &&
		    (write(fd, "0", 1) == 1))
			max_size = new_size;
	}
	if (!force && (new_size > max_size)) {
		fprintf(stderr, _("The containing partition (or device)"
			" is only %llu (%dk) blocks.\nYou requested a new size"
			" of %llu blocks.\n\n"), max_size,
			blocksize / 1024, new_size);
		exit(1);
	}
	if ((flags & RESIZE_DISABLE_64BIT) && (flags & RESIZE_ENABLE_64BIT)) {
		fprintf(stderr, _("Cannot set and unset 64bit feature.\n"));
		exit(1);
	} else if (flags & (RESIZE_DISABLE_64BIT | RESIZE_ENABLE_64BIT)) {
		if (new_size >= (1ULL << 32)) {
			fprintf(stderr, _("Cannot change the 64bit feature "
				"on a filesystem that is larger than "
				"2^32 blocks.\n"));
			exit(1);
		}
		if (mount_flags & EXT2_MF_MOUNTED) {
			fprintf(stderr, _("Cannot change the 64bit feature "
				"while the filesystem is mounted.\n"));
			exit(1);
		}
		if (flags & RESIZE_ENABLE_64BIT &&
		    !ext2fs_has_feature_extents(fs->super)) {
			fprintf(stderr, _("Please enable the extents feature "
				"with tune2fs before enabling the 64bit "
				"feature.\n"));
			exit(1);
		}
	} else if (new_size == ext2fs_blocks_count(fs->super)) {
		fprintf(stderr, _("The filesystem is already %llu (%dk) "
			"blocks long.  Nothing to do!\n\n"), new_size,
			blocksize / 1024);
		exit(0);
	}
	if ((flags & RESIZE_ENABLE_64BIT) &&
	    ext2fs_has_feature_64bit(fs->super)) {
		fprintf(stderr, _("The filesystem is already 64-bit.\n"));
		exit(0);
	}
	if ((flags & RESIZE_DISABLE_64BIT) &&
	    !ext2fs_has_feature_64bit(fs->super)) {
		fprintf(stderr, _("The filesystem is already 32-bit.\n"));
		exit(0);
	}
	if (mount_flags & EXT2_MF_MOUNTED) {
		bigalloc_check(fs, force);
		retval = online_resize_fs(fs, mtpt, &new_size, flags);
	} else {
		bigalloc_check(fs, force);
		if (flags & RESIZE_ENABLE_64BIT)
			printf(_("Converting the filesystem to 64-bit.\n"));
		else if (flags & RESIZE_DISABLE_64BIT)
			printf(_("Converting the filesystem to 32-bit.\n"));
		else
			printf(_("Resizing the filesystem on "
				 "%s to %llu (%dk) blocks.\n"),
			       device_name, new_size, blocksize / 1024);
		retval = resize_fs(fs, &new_size, flags,
				   ((flags & RESIZE_PERCENT_COMPLETE) ?
				    resize_progress_func : 0));
	}
	free(mtpt);
	if (retval) {
		com_err(program_name, retval, _("while trying to resize %s"),
			device_name);
		fprintf(stderr,
			_("Please run 'e2fsck -fy %s' to fix the filesystem\n"
			  "after the aborted resize operation.\n"),
			device_name);
		ext2fs_close_free(&fs);
		exit(1);
	}
	printf(_("The filesystem on %s is now %llu (%dk) blocks long.\n\n"),
	       device_name, new_size, blocksize / 1024);

	if ((st_buf.st_size > new_file_size) &&
	    (fd > 0)) {
#ifdef HAVE_FTRUNCATE64
		retval = ftruncate64(fd, new_file_size);
#else
		retval = 0;
		/* Only truncate if new_file_size doesn't overflow off_t */
		if (((off_t) new_file_size) == new_file_size)
			retval = ftruncate(fd, (off_t) new_file_size);
#endif
		if (retval)
			com_err(program_name, retval,
				_("while trying to truncate %s"),
				device_name);
	}
	if (fd > 0)
		close(fd);
	remove_error_table(&et_ext2_error_table);
	return (0);
}