126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/*
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* Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org>. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <assert.h>
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#include <err.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "fstyp.h"
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/*
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* https://developer.apple.com/library/archive/technotes/tn/tn1150.html
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*/
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#define VOL_HDR_OFF 1024
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typedef uint32_t hfsp_cat_nodeid;
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typedef struct hfsp_ext_desc {
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uint32_t ex_startBlock;
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uint32_t ex_blockCount;
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} hfsp_ext_desc;
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typedef struct hfsp_fork_data {
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uint64_t fd_logicalSz;
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uint32_t fd_clumpSz;
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uint32_t fd_totalBlocks;
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hfsp_ext_desc fd_extents[8];
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} hfsp_fork_data;
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struct hfsp_vol_hdr {
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char hp_signature[2];
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uint16_t hp_version;
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uint32_t hp_attributes;
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uint32_t hp_lastMounted;
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uint32_t hp_journalInfoBlock;
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/* Creation / etc dates. */
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uint32_t hp_create;
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uint32_t hp_modify;
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uint32_t hp_backup;
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uint32_t hp_checked;
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/* Stats */
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uint32_t hp_files;
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uint32_t hp_folders;
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/* Parameters */
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uint32_t hp_blockSize;
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uint32_t hp_totalBlocks;
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uint32_t hp_freeBlocks;
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uint32_t hp_nextAlloc;
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uint32_t hp_rsrcClumpSz;
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uint32_t hp_dataClumpSz;
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hfsp_cat_nodeid hp_nextCatID;
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uint32_t hp_writeCount;
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uint64_t hp_encodingsBM;
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uint32_t hp_finderInfo[8];
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hfsp_fork_data hp_allocationFile;
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hfsp_fork_data hp_extentsFile;
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hfsp_fork_data hp_catalogFile;
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hfsp_fork_data hp_attributesFile;
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hfsp_fork_data hp_startupFile;
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};
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_Static_assert(sizeof(struct hfsp_vol_hdr) == 512, "");
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int
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fstyp_hfsp(FILE *fp, char *label, size_t size)
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{
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struct hfsp_vol_hdr *hdr;
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int retval;
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retval = 1;
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hdr = read_buf(fp, VOL_HDR_OFF, sizeof(*hdr));
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if (hdr == NULL)
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goto fail;
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if ((strncmp(hdr->hp_signature, "H+", 2) != 0 || hdr->hp_version != 4)
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&&
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(strncmp(hdr->hp_signature, "HX", 2) != 0 || hdr->hp_version != 5))
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goto fail;
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/* This is an HFS+ volume. */
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retval = 0;
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/* No label support yet. */
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fail:
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free(hdr);
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return (retval);
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}
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