0638ccbfc6
Add fstyp(8). This utility, named after its SVR4 counterpart, detects filesystems. It differs from file(1) in that it gives machine-parseable output, it outputs filesystem labels, doesn't get confused by other formats metadata, and runs in Capsicum sandbox. Differential Revision: https://reviews.freebsd.org/D1255 Relnotes: yes Sponsored by: The FreeBSD Foundation
141 lines
4.1 KiB
C
141 lines
4.1 KiB
C
/*-
|
|
* Copyright (c) 2006 Tobias Reifenberger
|
|
* 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 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.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
|
|
/*
|
|
* Conversion macros for little endian encoded unsigned integers
|
|
* in byte streams to the local unsigned integer format.
|
|
*/
|
|
#define UINT16BYTES(p) ((uint32_t)((p)[0] + (256*(p)[1])))
|
|
#define UINT32BYTES(p) ((uint32_t)((p)[0] + (256*(p)[1]) + \
|
|
(65536*(p)[2]) + (16777216*(p)[3])))
|
|
|
|
/*
|
|
* All following structures are according to:
|
|
*
|
|
* Microsoft Extensible Firmware Initiative FAT32 File System Specification
|
|
* FAT: General Overview of On-Disk Format
|
|
* Version 1.03, December 6, 2000
|
|
* Microsoft Corporation
|
|
*/
|
|
|
|
/*
|
|
* FAT boot sector and boot parameter block for
|
|
* FAT12 and FAT16 volumes
|
|
*/
|
|
typedef struct fat_bsbpb {
|
|
/* common fields */
|
|
uint8_t BS_jmpBoot[3];
|
|
uint8_t BS_OEMName[8];
|
|
uint8_t BPB_BytsPerSec[2];
|
|
uint8_t BPB_SecPerClus;
|
|
uint8_t BPB_RsvdSecCnt[2];
|
|
uint8_t BPB_NumFATs;
|
|
uint8_t BPB_RootEntCnt[2];
|
|
uint8_t BPB_TotSec16[2];
|
|
uint8_t BPB_Media;
|
|
uint8_t BPB_FATSz16[2];
|
|
uint8_t BPB_SecPerTrack[2];
|
|
uint8_t BPB_NumHeads[2];
|
|
uint8_t BPB_HiddSec[4];
|
|
uint8_t BPB_TotSec32[4];
|
|
/* FAT12/FAT16 only fields */
|
|
uint8_t BS_DrvNum;
|
|
uint8_t BS_Reserved1;
|
|
uint8_t BS_BootSig;
|
|
uint8_t BS_VolID[4];
|
|
uint8_t BS_VolLab[11];
|
|
uint8_t BS_FilSysType[8];
|
|
} FAT_BSBPB; /* 62 bytes */
|
|
|
|
/*
|
|
* FAT boot sector and boot parameter block for
|
|
* FAT32 volumes
|
|
*/
|
|
typedef struct fat32_bsbpb {
|
|
/* common fields */
|
|
uint8_t BS_jmpBoot[3];
|
|
uint8_t BS_OEMName[8];
|
|
uint8_t BPB_BytsPerSec[2];
|
|
uint8_t BPB_SecPerClus;
|
|
uint8_t BPB_RsvdSecCnt[2];
|
|
uint8_t BPB_NumFATs;
|
|
uint8_t BPB_RootEntCnt[2];
|
|
uint8_t BPB_TotSec16[2];
|
|
uint8_t BPB_Media;
|
|
uint8_t BPB_FATSz16[2];
|
|
uint8_t BPB_SecPerTrack[2];
|
|
uint8_t BPB_NumHeads[2];
|
|
uint8_t BPB_HiddSec[4];
|
|
uint8_t BPB_TotSec32[4];
|
|
/* FAT32 only fields */
|
|
uint8_t BPB_FATSz32[4];
|
|
uint8_t BPB_ExtFlags[2];
|
|
uint8_t BPB_FSVer[2];
|
|
uint8_t BPB_RootClus[4];
|
|
uint8_t BPB_FSInfo[2];
|
|
uint8_t BPB_BkBootSec[2];
|
|
uint8_t BPB_Reserved[12];
|
|
uint8_t BS_DrvNum;
|
|
uint8_t BS_Reserved1;
|
|
uint8_t BS_BootSig;
|
|
uint8_t BS_VolID[4];
|
|
uint8_t BS_VolLab[11];
|
|
uint8_t BS_FilSysType[8];
|
|
} FAT32_BSBPB; /* 90 bytes */
|
|
|
|
/*
|
|
* FAT directory entry structure
|
|
*/
|
|
#define FAT_DES_ATTR_READ_ONLY 0x01
|
|
#define FAT_DES_ATTR_HIDDEN 0x02
|
|
#define FAT_DES_ATTR_SYSTEM 0x04
|
|
#define FAT_DES_ATTR_VOLUME_ID 0x08
|
|
#define FAT_DES_ATTR_DIRECTORY 0x10
|
|
#define FAT_DES_ATTR_ARCHIVE 0x20
|
|
#define FAT_DES_ATTR_LONG_NAME (FAT_DES_ATTR_READ_ONLY | \
|
|
FAT_DES_ATTR_HIDDEN | \
|
|
FAT_DES_ATTR_SYSTEM | \
|
|
FAT_DES_ATTR_VOLUME_ID)
|
|
|
|
typedef struct fat_des {
|
|
uint8_t DIR_Name[11];
|
|
uint8_t DIR_Attr;
|
|
uint8_t DIR_NTRes;
|
|
uint8_t DIR_CrtTimeTenth;
|
|
uint8_t DIR_CrtTime[2];
|
|
uint8_t DIR_CrtDate[2];
|
|
uint8_t DIR_LstAccDate[2];
|
|
uint8_t DIR_FstClusHI[2];
|
|
uint8_t DIR_WrtTime[2];
|
|
uint8_t DIR_WrtDate[2];
|
|
uint8_t DIR_FstClusLO[2];
|
|
uint8_t DIR_FileSize[4];
|
|
} FAT_DES;
|