diff options
Diffstat (limited to 'usr.sbin/fstyp/hfsplus.c')
| -rw-r--r-- | usr.sbin/fstyp/hfsplus.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/usr.sbin/fstyp/hfsplus.c b/usr.sbin/fstyp/hfsplus.c new file mode 100644 index 000000000000..bdeaaa3b397c --- /dev/null +++ b/usr.sbin/fstyp/hfsplus.c @@ -0,0 +1,125 @@ +/* + * Copyright (c) 2019 Conrad Meyer <cem@FreeBSD.org>. All rights reserved. + * + * 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 AUTHOR 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 AUTHOR 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> +#include <assert.h> +#include <err.h> +#include <errno.h> +#include <stdbool.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "fstyp.h" + +/* + * https://developer.apple.com/library/archive/technotes/tn/tn1150.html + */ + +#define VOL_HDR_OFF 1024 + +typedef uint32_t hfsp_cat_nodeid; + +typedef struct hfsp_ext_desc { + uint32_t ex_startBlock; + uint32_t ex_blockCount; +} hfsp_ext_desc; + +typedef struct hfsp_fork_data { + uint64_t fd_logicalSz; + uint32_t fd_clumpSz; + uint32_t fd_totalBlocks; + hfsp_ext_desc fd_extents[8]; +} hfsp_fork_data; + +struct hfsp_vol_hdr { + char hp_signature[2]; + uint16_t hp_version; + uint32_t hp_attributes; + uint32_t hp_lastMounted; + uint32_t hp_journalInfoBlock; + + /* Creation / etc dates. */ + uint32_t hp_create; + uint32_t hp_modify; + uint32_t hp_backup; + uint32_t hp_checked; + + /* Stats */ + uint32_t hp_files; + uint32_t hp_folders; + + /* Parameters */ + uint32_t hp_blockSize; + uint32_t hp_totalBlocks; + uint32_t hp_freeBlocks; + + uint32_t hp_nextAlloc; + uint32_t hp_rsrcClumpSz; + uint32_t hp_dataClumpSz; + + hfsp_cat_nodeid hp_nextCatID; + + uint32_t hp_writeCount; + uint64_t hp_encodingsBM; + + uint32_t hp_finderInfo[8]; + + hfsp_fork_data hp_allocationFile; + hfsp_fork_data hp_extentsFile; + hfsp_fork_data hp_catalogFile; + hfsp_fork_data hp_attributesFile; + hfsp_fork_data hp_startupFile; +}; +_Static_assert(sizeof(struct hfsp_vol_hdr) == 512, ""); + +int +fstyp_hfsp(FILE *fp, char *label, size_t size) +{ + struct hfsp_vol_hdr *hdr; + int retval; + + retval = 1; + hdr = read_buf(fp, VOL_HDR_OFF, sizeof(*hdr)); + if (hdr == NULL) + goto fail; + + if ((strncmp(hdr->hp_signature, "H+", 2) != 0 || hdr->hp_version != 4) + && + (strncmp(hdr->hp_signature, "HX", 2) != 0 || hdr->hp_version != 5)) + goto fail; + + /* This is an HFS+ volume. */ + retval = 0; + + /* No label support yet. */ + (void)size; + (void)label; + +fail: + free(hdr); + return (retval); +} |