Differential D13369 Diff 36205 usr.sbin/fstyp/hammer2.c

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usr.sbin/fstyp/hammer2.c

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				/*-
				* Copyright (c) 2017 The DragonFly Project
				* All rights reserved.
				*
				* This software was developed by Edward Tomasz Napierala under sponsorship
				* from the FreeBSD Foundation.
				*
				* Redistribution and use in source and binary forms, with or without
				* modification, are permitted provided that the following conditions
				* are met:
				* 1. Redistributions of source code must retain the above copyright
				* notice, this list of conditions and the following disclaimer.
				* 2. Redistributions in binary form must reproduce the above copyright
				* notice, this list of conditions and the following disclaimer in the
				* documentation and/or other materials provided with the distribution.
				*
				* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
				* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
				* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
				* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
				* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
				* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
				* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
				* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
				* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
				* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
				* SUCH DAMAGE.
				*/

				#include <sys/cdefs.h>
				__FBSDID("$FreeBSD$");

				#include <stdio.h>
				#include <stdlib.h>
				#include <string.h>
				#include <err.h>
				eadlerUnsubmitted Not Done Inline Actions nit: sort eadler: nit: sort

				#include <sys/types.h>

				#include "hammer2_disk.h"

				#include "fstyp.h"

				static hammer2_volume_data_t*
				__read_voldata(FILE *fp)
				{
				hammer2_volume_data_t *voldata;

				voldata = read_buf(fp, 0, sizeof(*voldata));
				if (voldata == NULL)
				err(1, "failed to read volume data");

				return (voldata);
				}

				static int
				__test_voldata(const hammer2_volume_data_t *voldata)
				{
				if (voldata->magic != HAMMER2_VOLUME_ID_HBO &&
				voldata->magic != HAMMER2_VOLUME_ID_ABO)
				return (1);

				return (0);
				}

				int
				fstyp_hammer2(FILE fp, char label, size_t size)
				{
				hammer2_volume_data_t *voldata;
				int error = 1;
				eadlerUnsubmitted Not Done Inline Actions nit: I feel like FreeBSD style frowns on mixing declarations and init like this, though I'm not sure that's a good thing eadler: nit: I feel like FreeBSD style frowns on mixing declarations and init like this, though I'm not…

				voldata = __read_voldata(fp);
				if (__test_voldata(voldata))
				goto done;

				// XXX -l option not supported yet
				//strlcpy(label, "label", size);

				error = 0;
				done:
				free(voldata);
				return (error);
				}