658029e0d8
change the on-disk format in an incompatible way. Without this change, msdosfs created on FreeBSD/arm would not be mountable. PR: bin/162486 Submitted by: Ian Lepore <freebsd damnhippie dyndns org> Reported by: Mattia Rossi <mrossi at swin.edu.au> MFC after: 3 days
1044 lines
32 KiB
C
1044 lines
32 KiB
C
/*
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* Copyright (c) 1998 Robert Nordier
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* 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
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/fdcio.h>
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#include <sys/disk.h>
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#include <sys/disklabel.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <paths.h>
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#include <signal.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 <time.h>
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#include <unistd.h>
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#define MAXU16 0xffff /* maximum unsigned 16-bit quantity */
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#define BPN 4 /* bits per nibble */
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#define NPB 2 /* nibbles per byte */
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#define DOSMAGIC 0xaa55 /* DOS magic number */
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#define MINBPS 512 /* minimum bytes per sector */
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#define MAXSPC 128 /* maximum sectors per cluster */
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#define MAXNFT 16 /* maximum number of FATs */
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#define DEFBLK 4096 /* default block size */
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#define DEFBLK16 2048 /* default block size FAT16 */
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#define DEFRDE 512 /* default root directory entries */
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#define RESFTE 2 /* reserved FAT entries */
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#define MINCLS12 1U /* minimum FAT12 clusters */
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#define MINCLS16 0x1000U /* minimum FAT16 clusters */
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#define MINCLS32 2U /* minimum FAT32 clusters */
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#define MAXCLS12 0xfedU /* maximum FAT12 clusters */
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#define MAXCLS16 0xfff5U /* maximum FAT16 clusters */
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#define MAXCLS32 0xffffff5U /* maximum FAT32 clusters */
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#define mincls(fat) ((fat) == 12 ? MINCLS12 : \
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(fat) == 16 ? MINCLS16 : \
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MINCLS32)
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#define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \
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(fat) == 16 ? MAXCLS16 : \
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MAXCLS32)
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#define mk1(p, x) \
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(p) = (u_int8_t)(x)
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#define mk2(p, x) \
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(p)[0] = (u_int8_t)(x), \
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(p)[1] = (u_int8_t)((x) >> 010)
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#define mk4(p, x) \
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(p)[0] = (u_int8_t)(x), \
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(p)[1] = (u_int8_t)((x) >> 010), \
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(p)[2] = (u_int8_t)((x) >> 020), \
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(p)[3] = (u_int8_t)((x) >> 030)
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#define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg)
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#define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg)
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#define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg)
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#define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg)
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struct bs {
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u_int8_t bsJump[3]; /* bootstrap entry point */
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u_int8_t bsOemName[8]; /* OEM name and version */
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} __packed;
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struct bsbpb {
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u_int8_t bpbBytesPerSec[2]; /* bytes per sector */
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u_int8_t bpbSecPerClust; /* sectors per cluster */
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u_int8_t bpbResSectors[2]; /* reserved sectors */
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u_int8_t bpbFATs; /* number of FATs */
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u_int8_t bpbRootDirEnts[2]; /* root directory entries */
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u_int8_t bpbSectors[2]; /* total sectors */
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u_int8_t bpbMedia; /* media descriptor */
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u_int8_t bpbFATsecs[2]; /* sectors per FAT */
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u_int8_t bpbSecPerTrack[2]; /* sectors per track */
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u_int8_t bpbHeads[2]; /* drive heads */
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u_int8_t bpbHiddenSecs[4]; /* hidden sectors */
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u_int8_t bpbHugeSectors[4]; /* big total sectors */
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} __packed;
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struct bsxbpb {
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u_int8_t bpbBigFATsecs[4]; /* big sectors per FAT */
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u_int8_t bpbExtFlags[2]; /* FAT control flags */
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u_int8_t bpbFSVers[2]; /* file system version */
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u_int8_t bpbRootClust[4]; /* root directory start cluster */
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u_int8_t bpbFSInfo[2]; /* file system info sector */
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u_int8_t bpbBackup[2]; /* backup boot sector */
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u_int8_t bpbReserved[12]; /* reserved */
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} __packed;
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struct bsx {
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u_int8_t exDriveNumber; /* drive number */
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u_int8_t exReserved1; /* reserved */
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u_int8_t exBootSignature; /* extended boot signature */
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u_int8_t exVolumeID[4]; /* volume ID number */
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u_int8_t exVolumeLabel[11]; /* volume label */
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u_int8_t exFileSysType[8]; /* file system type */
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} __packed;
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struct de {
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u_int8_t deName[11]; /* name and extension */
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u_int8_t deAttributes; /* attributes */
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u_int8_t rsvd[10]; /* reserved */
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u_int8_t deMTime[2]; /* creation time */
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u_int8_t deMDate[2]; /* creation date */
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u_int8_t deStartCluster[2]; /* starting cluster */
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u_int8_t deFileSize[4]; /* size */
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} __packed;
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struct bpb {
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u_int bpbBytesPerSec; /* bytes per sector */
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u_int bpbSecPerClust; /* sectors per cluster */
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u_int bpbResSectors; /* reserved sectors */
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u_int bpbFATs; /* number of FATs */
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u_int bpbRootDirEnts; /* root directory entries */
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u_int bpbSectors; /* total sectors */
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u_int bpbMedia; /* media descriptor */
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u_int bpbFATsecs; /* sectors per FAT */
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u_int bpbSecPerTrack; /* sectors per track */
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u_int bpbHeads; /* drive heads */
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u_int bpbHiddenSecs; /* hidden sectors */
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u_int bpbHugeSectors; /* big total sectors */
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u_int bpbBigFATsecs; /* big sectors per FAT */
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u_int bpbRootClust; /* root directory start cluster */
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u_int bpbFSInfo; /* file system info sector */
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u_int bpbBackup; /* backup boot sector */
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};
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#define BPBGAP 0, 0, 0, 0, 0, 0
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#define INIT(a, b, c, d, e, f, g, h, i, j) \
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{ .bpbBytesPerSec = a, .bpbSecPerClust = b, .bpbResSectors = c, .bpbFATs = d, .bpbRootDirEnts = e, \
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.bpbSectors = f, .bpbMedia = g, .bpbFATsecs = h, .bpbSecPerTrack = i, .bpbHeads = j, }
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static struct {
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const char *name;
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struct bpb bpb;
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} const stdfmt[] = {
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{"160", INIT(512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1)},
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{"180", INIT(512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1)},
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{"320", INIT(512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2)},
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{"360", INIT(512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2)},
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{"640", INIT(512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2)},
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{"720", INIT(512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2)},
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{"1200", INIT(512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2)},
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{"1232", INIT(1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2)},
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{"1440", INIT(512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2)},
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{"2880", INIT(512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2)}
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};
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static const u_int8_t bootcode[] = {
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0xfa, /* cli */
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0x31, 0xc0, /* xor ax,ax */
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0x8e, 0xd0, /* mov ss,ax */
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0xbc, 0x00, 0x7c, /* mov sp,7c00h */
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0xfb, /* sti */
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0x8e, 0xd8, /* mov ds,ax */
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0xe8, 0x00, 0x00, /* call $ + 3 */
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0x5e, /* pop si */
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0x83, 0xc6, 0x19, /* add si,+19h */
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0xbb, 0x07, 0x00, /* mov bx,0007h */
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0xfc, /* cld */
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0xac, /* lodsb */
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0x84, 0xc0, /* test al,al */
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0x74, 0x06, /* jz $ + 8 */
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0xb4, 0x0e, /* mov ah,0eh */
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0xcd, 0x10, /* int 10h */
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0xeb, 0xf5, /* jmp $ - 9 */
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0x30, 0xe4, /* xor ah,ah */
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0xcd, 0x16, /* int 16h */
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0xcd, 0x19, /* int 19h */
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0x0d, 0x0a,
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'N', 'o', 'n', '-', 's', 'y', 's', 't',
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'e', 'm', ' ', 'd', 'i', 's', 'k',
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0x0d, 0x0a,
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'P', 'r', 'e', 's', 's', ' ', 'a', 'n',
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'y', ' ', 'k', 'e', 'y', ' ', 't', 'o',
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' ', 'r', 'e', 'b', 'o', 'o', 't',
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0x0d, 0x0a,
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0
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};
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static volatile sig_atomic_t got_siginfo;
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static void infohandler(int);
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static void check_mounted(const char *, mode_t);
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static void getstdfmt(const char *, struct bpb *);
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static void getdiskinfo(int, const char *, const char *, int,
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struct bpb *);
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static void print_bpb(struct bpb *);
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static u_int ckgeom(const char *, u_int, const char *);
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static u_int argtou(const char *, u_int, u_int, const char *);
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static off_t argtooff(const char *, const char *);
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static int oklabel(const char *);
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static void mklabel(u_int8_t *, const char *);
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static void setstr(u_int8_t *, const char *, size_t);
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static void usage(void);
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/*
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* Construct a FAT12, FAT16, or FAT32 file system.
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*/
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int
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main(int argc, char *argv[])
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{
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static const char opts[] = "@:NB:C:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:r:s:u:";
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const char *opt_B = NULL, *opt_L = NULL, *opt_O = NULL, *opt_f = NULL;
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u_int opt_F = 0, opt_I = 0, opt_S = 0, opt_a = 0, opt_b = 0, opt_c = 0;
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u_int opt_e = 0, opt_h = 0, opt_i = 0, opt_k = 0, opt_m = 0, opt_n = 0;
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u_int opt_o = 0, opt_r = 0, opt_s = 0, opt_u = 0;
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int opt_N = 0;
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int Iflag = 0, mflag = 0, oflag = 0;
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char buf[MAXPATHLEN];
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struct sigaction si_sa;
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struct stat sb;
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struct timeval tv;
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struct bpb bpb;
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struct tm *tm;
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struct bs *bs;
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struct bsbpb *bsbpb;
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struct bsxbpb *bsxbpb;
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struct bsx *bsx;
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struct de *de;
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u_int8_t *img;
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const char *fname, *dtype, *bname;
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ssize_t n;
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time_t now;
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u_int fat, bss, rds, cls, dir, lsn, x, x1, x2;
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int ch, fd, fd1;
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off_t opt_create = 0, opt_ofs = 0;
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while ((ch = getopt(argc, argv, opts)) != -1)
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switch (ch) {
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case '@':
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opt_ofs = argtooff(optarg, "offset");
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break;
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case 'N':
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opt_N = 1;
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break;
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case 'B':
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opt_B = optarg;
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break;
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case 'C':
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opt_create = argtooff(optarg, "create size");
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break;
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case 'F':
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if (strcmp(optarg, "12") &&
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strcmp(optarg, "16") &&
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strcmp(optarg, "32"))
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errx(1, "%s: bad FAT type", optarg);
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opt_F = atoi(optarg);
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break;
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case 'I':
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opt_I = argto4(optarg, 0, "volume ID");
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Iflag = 1;
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break;
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case 'L':
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if (!oklabel(optarg))
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errx(1, "%s: bad volume label", optarg);
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opt_L = optarg;
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break;
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case 'O':
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if (strlen(optarg) > 8)
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errx(1, "%s: bad OEM string", optarg);
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opt_O = optarg;
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break;
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case 'S':
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opt_S = argto2(optarg, 1, "bytes/sector");
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break;
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case 'a':
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opt_a = argto4(optarg, 1, "sectors/FAT");
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break;
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case 'b':
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opt_b = argtox(optarg, 1, "block size");
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opt_c = 0;
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break;
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case 'c':
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opt_c = argto1(optarg, 1, "sectors/cluster");
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opt_b = 0;
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break;
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case 'e':
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opt_e = argto2(optarg, 1, "directory entries");
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break;
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case 'f':
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opt_f = optarg;
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break;
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case 'h':
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opt_h = argto2(optarg, 1, "drive heads");
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break;
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case 'i':
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opt_i = argto2(optarg, 1, "info sector");
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break;
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case 'k':
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opt_k = argto2(optarg, 1, "backup sector");
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break;
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case 'm':
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opt_m = argto1(optarg, 0, "media descriptor");
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mflag = 1;
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break;
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case 'n':
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opt_n = argto1(optarg, 1, "number of FATs");
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break;
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case 'o':
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opt_o = argto4(optarg, 0, "hidden sectors");
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oflag = 1;
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break;
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case 'r':
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opt_r = argto2(optarg, 1, "reserved sectors");
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break;
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case 's':
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opt_s = argto4(optarg, 1, "file system size");
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break;
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case 'u':
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opt_u = argto2(optarg, 1, "sectors/track");
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc < 1 || argc > 2)
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usage();
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fname = *argv++;
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if (!opt_create && !strchr(fname, '/')) {
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snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname);
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if (!(fname = strdup(buf)))
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err(1, NULL);
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}
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dtype = *argv;
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if (opt_create) {
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if (opt_N)
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errx(1, "create (-C) is incompatible with -N");
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fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644);
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if (fd == -1)
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errx(1, "failed to create %s", fname);
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if (ftruncate(fd, opt_create))
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errx(1, "failed to initialize %jd bytes", (intmax_t)opt_create);
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} else if ((fd = open(fname, opt_N ? O_RDONLY : O_RDWR)) == -1)
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err(1, "%s", fname);
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if (fstat(fd, &sb))
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err(1, "%s", fname);
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if (opt_create) {
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if (!S_ISREG(sb.st_mode))
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warnx("warning, %s is not a regular file", fname);
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} else {
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if (!S_ISCHR(sb.st_mode))
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warnx("warning, %s is not a character device", fname);
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}
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if (!opt_N)
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check_mounted(fname, sb.st_mode);
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if (opt_ofs && opt_ofs != lseek(fd, opt_ofs, SEEK_SET))
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errx(1, "cannot seek to %jd", (intmax_t)opt_ofs);
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memset(&bpb, 0, sizeof(bpb));
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if (opt_f) {
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getstdfmt(opt_f, &bpb);
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bpb.bpbHugeSectors = bpb.bpbSectors;
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bpb.bpbSectors = 0;
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bpb.bpbBigFATsecs = bpb.bpbFATsecs;
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bpb.bpbFATsecs = 0;
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}
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if (opt_h)
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bpb.bpbHeads = opt_h;
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if (opt_u)
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bpb.bpbSecPerTrack = opt_u;
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if (opt_S)
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bpb.bpbBytesPerSec = opt_S;
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if (opt_s)
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bpb.bpbHugeSectors = opt_s;
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if (oflag)
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bpb.bpbHiddenSecs = opt_o;
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if (!(opt_f || (opt_h && opt_u && opt_S && opt_s && oflag))) {
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off_t delta;
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getdiskinfo(fd, fname, dtype, oflag, &bpb);
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bpb.bpbHugeSectors -= (opt_ofs / bpb.bpbBytesPerSec);
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delta = bpb.bpbHugeSectors % bpb.bpbSecPerTrack;
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if (delta != 0) {
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warnx("trim %d sectors to adjust to a multiple of %d",
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(int)delta, bpb.bpbSecPerTrack);
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bpb.bpbHugeSectors -= delta;
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}
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if (bpb.bpbSecPerClust == 0) { /* set defaults */
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if (bpb.bpbHugeSectors <= 6000) /* about 3MB -> 512 bytes */
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bpb.bpbSecPerClust = 1;
|
|
else if (bpb.bpbHugeSectors <= (1<<17)) /* 64M -> 4k */
|
|
bpb.bpbSecPerClust = 8;
|
|
else if (bpb.bpbHugeSectors <= (1<<19)) /* 256M -> 8k */
|
|
bpb.bpbSecPerClust = 16;
|
|
else if (bpb.bpbHugeSectors <= (1<<21)) /* 1G -> 16k */
|
|
bpb.bpbSecPerClust = 32;
|
|
else
|
|
bpb.bpbSecPerClust = 64; /* otherwise 32k */
|
|
}
|
|
}
|
|
if (!powerof2(bpb.bpbBytesPerSec))
|
|
errx(1, "bytes/sector (%u) is not a power of 2", bpb.bpbBytesPerSec);
|
|
if (bpb.bpbBytesPerSec < MINBPS)
|
|
errx(1, "bytes/sector (%u) is too small; minimum is %u",
|
|
bpb.bpbBytesPerSec, MINBPS);
|
|
if (!(fat = opt_F)) {
|
|
if (opt_f)
|
|
fat = 12;
|
|
else if (!opt_e && (opt_i || opt_k))
|
|
fat = 32;
|
|
}
|
|
if ((fat == 32 && opt_e) || (fat != 32 && (opt_i || opt_k)))
|
|
errx(1, "-%c is not a legal FAT%s option",
|
|
fat == 32 ? 'e' : opt_i ? 'i' : 'k',
|
|
fat == 32 ? "32" : "12/16");
|
|
if (opt_f && fat == 32)
|
|
bpb.bpbRootDirEnts = 0;
|
|
if (opt_b) {
|
|
if (!powerof2(opt_b))
|
|
errx(1, "block size (%u) is not a power of 2", opt_b);
|
|
if (opt_b < bpb.bpbBytesPerSec)
|
|
errx(1, "block size (%u) is too small; minimum is %u",
|
|
opt_b, bpb.bpbBytesPerSec);
|
|
if (opt_b > bpb.bpbBytesPerSec * MAXSPC)
|
|
errx(1, "block size (%u) is too large; maximum is %u",
|
|
opt_b, bpb.bpbBytesPerSec * MAXSPC);
|
|
bpb.bpbSecPerClust = opt_b / bpb.bpbBytesPerSec;
|
|
}
|
|
if (opt_c) {
|
|
if (!powerof2(opt_c))
|
|
errx(1, "sectors/cluster (%u) is not a power of 2", opt_c);
|
|
bpb.bpbSecPerClust = opt_c;
|
|
}
|
|
if (opt_r)
|
|
bpb.bpbResSectors = opt_r;
|
|
if (opt_n) {
|
|
if (opt_n > MAXNFT)
|
|
errx(1, "number of FATs (%u) is too large; maximum is %u",
|
|
opt_n, MAXNFT);
|
|
bpb.bpbFATs = opt_n;
|
|
}
|
|
if (opt_e)
|
|
bpb.bpbRootDirEnts = opt_e;
|
|
if (mflag) {
|
|
if (opt_m < 0xf0)
|
|
errx(1, "illegal media descriptor (%#x)", opt_m);
|
|
bpb.bpbMedia = opt_m;
|
|
}
|
|
if (opt_a)
|
|
bpb.bpbBigFATsecs = opt_a;
|
|
if (opt_i)
|
|
bpb.bpbFSInfo = opt_i;
|
|
if (opt_k)
|
|
bpb.bpbBackup = opt_k;
|
|
bss = 1;
|
|
bname = NULL;
|
|
fd1 = -1;
|
|
if (opt_B) {
|
|
bname = opt_B;
|
|
if (!strchr(bname, '/')) {
|
|
snprintf(buf, sizeof(buf), "/boot/%s", bname);
|
|
if (!(bname = strdup(buf)))
|
|
err(1, NULL);
|
|
}
|
|
if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb))
|
|
err(1, "%s", bname);
|
|
if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bpbBytesPerSec ||
|
|
sb.st_size < bpb.bpbBytesPerSec || sb.st_size > bpb.bpbBytesPerSec * MAXU16)
|
|
errx(1, "%s: inappropriate file type or format", bname);
|
|
bss = sb.st_size / bpb.bpbBytesPerSec;
|
|
}
|
|
if (!bpb.bpbFATs)
|
|
bpb.bpbFATs = 2;
|
|
if (!fat) {
|
|
if (bpb.bpbHugeSectors < (bpb.bpbResSectors ? bpb.bpbResSectors : bss) +
|
|
howmany((RESFTE + (bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1)) *
|
|
((bpb.bpbSecPerClust ? 16 : 12) / BPN), bpb.bpbBytesPerSec * NPB) *
|
|
bpb.bpbFATs +
|
|
howmany(bpb.bpbRootDirEnts ? bpb.bpbRootDirEnts : DEFRDE,
|
|
bpb.bpbBytesPerSec / sizeof(struct de)) +
|
|
(bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1) *
|
|
(bpb.bpbSecPerClust ? bpb.bpbSecPerClust : howmany(DEFBLK, bpb.bpbBytesPerSec)))
|
|
fat = 12;
|
|
else if (bpb.bpbRootDirEnts || bpb.bpbHugeSectors <
|
|
(bpb.bpbResSectors ? bpb.bpbResSectors : bss) +
|
|
howmany((RESFTE + MAXCLS16) * 2, bpb.bpbBytesPerSec) * bpb.bpbFATs +
|
|
howmany(DEFRDE, bpb.bpbBytesPerSec / sizeof(struct de)) +
|
|
(MAXCLS16 + 1) *
|
|
(bpb.bpbSecPerClust ? bpb.bpbSecPerClust : howmany(8192, bpb.bpbBytesPerSec)))
|
|
fat = 16;
|
|
else
|
|
fat = 32;
|
|
}
|
|
x = bss;
|
|
if (fat == 32) {
|
|
if (!bpb.bpbFSInfo) {
|
|
if (x == MAXU16 || x == bpb.bpbBackup)
|
|
errx(1, "no room for info sector");
|
|
bpb.bpbFSInfo = x;
|
|
}
|
|
if (bpb.bpbFSInfo != MAXU16 && x <= bpb.bpbFSInfo)
|
|
x = bpb.bpbFSInfo + 1;
|
|
if (!bpb.bpbBackup) {
|
|
if (x == MAXU16)
|
|
errx(1, "no room for backup sector");
|
|
bpb.bpbBackup = x;
|
|
} else if (bpb.bpbBackup != MAXU16 && bpb.bpbBackup == bpb.bpbFSInfo)
|
|
errx(1, "backup sector would overwrite info sector");
|
|
if (bpb.bpbBackup != MAXU16 && x <= bpb.bpbBackup)
|
|
x = bpb.bpbBackup + 1;
|
|
}
|
|
if (!bpb.bpbResSectors)
|
|
bpb.bpbResSectors = fat == 32 ? MAX(x, MAX(16384 / bpb.bpbBytesPerSec, 4)) : x;
|
|
else if (bpb.bpbResSectors < x)
|
|
errx(1, "too few reserved sectors (need %d have %d)", x, bpb.bpbResSectors);
|
|
if (fat != 32 && !bpb.bpbRootDirEnts)
|
|
bpb.bpbRootDirEnts = DEFRDE;
|
|
rds = howmany(bpb.bpbRootDirEnts, bpb.bpbBytesPerSec / sizeof(struct de));
|
|
if (!bpb.bpbSecPerClust)
|
|
for (bpb.bpbSecPerClust = howmany(fat == 16 ? DEFBLK16 : DEFBLK, bpb.bpbBytesPerSec);
|
|
bpb.bpbSecPerClust < MAXSPC &&
|
|
bpb.bpbResSectors +
|
|
howmany((RESFTE + maxcls(fat)) * (fat / BPN),
|
|
bpb.bpbBytesPerSec * NPB) * bpb.bpbFATs +
|
|
rds +
|
|
(u_int64_t)(maxcls(fat) + 1) * bpb.bpbSecPerClust <= bpb.bpbHugeSectors;
|
|
bpb.bpbSecPerClust <<= 1);
|
|
if (fat != 32 && bpb.bpbBigFATsecs > MAXU16)
|
|
errx(1, "too many sectors/FAT for FAT12/16");
|
|
x1 = bpb.bpbResSectors + rds;
|
|
x = bpb.bpbBigFATsecs ? bpb.bpbBigFATsecs : 1;
|
|
if (x1 + (u_int64_t)x * bpb.bpbFATs > bpb.bpbHugeSectors)
|
|
errx(1, "meta data exceeds file system size");
|
|
x1 += x * bpb.bpbFATs;
|
|
x = (u_int64_t)(bpb.bpbHugeSectors - x1) * bpb.bpbBytesPerSec * NPB /
|
|
(bpb.bpbSecPerClust * bpb.bpbBytesPerSec * NPB + fat / BPN * bpb.bpbFATs);
|
|
x2 = howmany((RESFTE + MIN(x, maxcls(fat))) * (fat / BPN),
|
|
bpb.bpbBytesPerSec * NPB);
|
|
if (!bpb.bpbBigFATsecs) {
|
|
bpb.bpbBigFATsecs = x2;
|
|
x1 += (bpb.bpbBigFATsecs - 1) * bpb.bpbFATs;
|
|
}
|
|
cls = (bpb.bpbHugeSectors - x1) / bpb.bpbSecPerClust;
|
|
x = (u_int64_t)bpb.bpbBigFATsecs * bpb.bpbBytesPerSec * NPB / (fat / BPN) - RESFTE;
|
|
if (cls > x)
|
|
cls = x;
|
|
if (bpb.bpbBigFATsecs < x2)
|
|
warnx("warning: sectors/FAT limits file system to %u clusters",
|
|
cls);
|
|
if (cls < mincls(fat))
|
|
errx(1, "%u clusters too few clusters for FAT%u, need %u", cls, fat,
|
|
mincls(fat));
|
|
if (cls > maxcls(fat)) {
|
|
cls = maxcls(fat);
|
|
bpb.bpbHugeSectors = x1 + (cls + 1) * bpb.bpbSecPerClust - 1;
|
|
warnx("warning: FAT type limits file system to %u sectors",
|
|
bpb.bpbHugeSectors);
|
|
}
|
|
printf("%s: %u sector%s in %u FAT%u cluster%s "
|
|
"(%u bytes/cluster)\n", fname, cls * bpb.bpbSecPerClust,
|
|
cls * bpb.bpbSecPerClust == 1 ? "" : "s", cls, fat,
|
|
cls == 1 ? "" : "s", bpb.bpbBytesPerSec * bpb.bpbSecPerClust);
|
|
if (!bpb.bpbMedia)
|
|
bpb.bpbMedia = !bpb.bpbHiddenSecs ? 0xf0 : 0xf8;
|
|
if (fat == 32)
|
|
bpb.bpbRootClust = RESFTE;
|
|
if (bpb.bpbHiddenSecs + bpb.bpbHugeSectors <= MAXU16) {
|
|
bpb.bpbSectors = bpb.bpbHugeSectors;
|
|
bpb.bpbHugeSectors = 0;
|
|
}
|
|
if (fat != 32) {
|
|
bpb.bpbFATsecs = bpb.bpbBigFATsecs;
|
|
bpb.bpbBigFATsecs = 0;
|
|
}
|
|
print_bpb(&bpb);
|
|
if (!opt_N) {
|
|
gettimeofday(&tv, NULL);
|
|
now = tv.tv_sec;
|
|
tm = localtime(&now);
|
|
if (!(img = malloc(bpb.bpbBytesPerSec)))
|
|
err(1, NULL);
|
|
dir = bpb.bpbResSectors + (bpb.bpbFATsecs ? bpb.bpbFATsecs : bpb.bpbBigFATsecs) * bpb.bpbFATs;
|
|
memset(&si_sa, 0, sizeof(si_sa));
|
|
si_sa.sa_handler = infohandler;
|
|
if (sigaction(SIGINFO, &si_sa, NULL) == -1)
|
|
err(1, "sigaction SIGINFO");
|
|
for (lsn = 0; lsn < dir + (fat == 32 ? bpb.bpbSecPerClust : rds); lsn++) {
|
|
if (got_siginfo) {
|
|
fprintf(stderr,"%s: writing sector %u of %u (%u%%)\n",
|
|
fname, lsn,
|
|
(dir + (fat == 32 ? bpb.bpbSecPerClust: rds)),
|
|
(lsn * 100) / (dir +
|
|
(fat == 32 ? bpb.bpbSecPerClust: rds)));
|
|
got_siginfo = 0;
|
|
}
|
|
x = lsn;
|
|
if (opt_B &&
|
|
fat == 32 && bpb.bpbBackup != MAXU16 &&
|
|
bss <= bpb.bpbBackup && x >= bpb.bpbBackup) {
|
|
x -= bpb.bpbBackup;
|
|
if (!x && lseek(fd1, opt_ofs, SEEK_SET))
|
|
err(1, "%s", bname);
|
|
}
|
|
if (opt_B && x < bss) {
|
|
if ((n = read(fd1, img, bpb.bpbBytesPerSec)) == -1)
|
|
err(1, "%s", bname);
|
|
if ((unsigned)n != bpb.bpbBytesPerSec)
|
|
errx(1, "%s: can't read sector %u", bname, x);
|
|
} else
|
|
memset(img, 0, bpb.bpbBytesPerSec);
|
|
if (!lsn ||
|
|
(fat == 32 && bpb.bpbBackup != MAXU16 && lsn == bpb.bpbBackup)) {
|
|
x1 = sizeof(struct bs);
|
|
bsbpb = (struct bsbpb *)(img + x1);
|
|
mk2(bsbpb->bpbBytesPerSec, bpb.bpbBytesPerSec);
|
|
mk1(bsbpb->bpbSecPerClust, bpb.bpbSecPerClust);
|
|
mk2(bsbpb->bpbResSectors, bpb.bpbResSectors);
|
|
mk1(bsbpb->bpbFATs, bpb.bpbFATs);
|
|
mk2(bsbpb->bpbRootDirEnts, bpb.bpbRootDirEnts);
|
|
mk2(bsbpb->bpbSectors, bpb.bpbSectors);
|
|
mk1(bsbpb->bpbMedia, bpb.bpbMedia);
|
|
mk2(bsbpb->bpbFATsecs, bpb.bpbFATsecs);
|
|
mk2(bsbpb->bpbSecPerTrack, bpb.bpbSecPerTrack);
|
|
mk2(bsbpb->bpbHeads, bpb.bpbHeads);
|
|
mk4(bsbpb->bpbHiddenSecs, bpb.bpbHiddenSecs);
|
|
mk4(bsbpb->bpbHugeSectors, bpb.bpbHugeSectors);
|
|
x1 += sizeof(struct bsbpb);
|
|
if (fat == 32) {
|
|
bsxbpb = (struct bsxbpb *)(img + x1);
|
|
mk4(bsxbpb->bpbBigFATsecs, bpb.bpbBigFATsecs);
|
|
mk2(bsxbpb->bpbExtFlags, 0);
|
|
mk2(bsxbpb->bpbFSVers, 0);
|
|
mk4(bsxbpb->bpbRootClust, bpb.bpbRootClust);
|
|
mk2(bsxbpb->bpbFSInfo, bpb.bpbFSInfo);
|
|
mk2(bsxbpb->bpbBackup, bpb.bpbBackup);
|
|
x1 += sizeof(struct bsxbpb);
|
|
}
|
|
bsx = (struct bsx *)(img + x1);
|
|
mk1(bsx->exBootSignature, 0x29);
|
|
if (Iflag)
|
|
x = opt_I;
|
|
else
|
|
x = (((u_int)(1 + tm->tm_mon) << 8 |
|
|
(u_int)tm->tm_mday) +
|
|
((u_int)tm->tm_sec << 8 |
|
|
(u_int)(tv.tv_usec / 10))) << 16 |
|
|
((u_int)(1900 + tm->tm_year) +
|
|
((u_int)tm->tm_hour << 8 |
|
|
(u_int)tm->tm_min));
|
|
mk4(bsx->exVolumeID, x);
|
|
mklabel(bsx->exVolumeLabel, opt_L ? opt_L : "NO_NAME");
|
|
sprintf(buf, "FAT%u", fat);
|
|
setstr(bsx->exFileSysType, buf, sizeof(bsx->exFileSysType));
|
|
if (!opt_B) {
|
|
x1 += sizeof(struct bsx);
|
|
bs = (struct bs *)img;
|
|
mk1(bs->bsJump[0], 0xeb);
|
|
mk1(bs->bsJump[1], x1 - 2);
|
|
mk1(bs->bsJump[2], 0x90);
|
|
setstr(bs->bsOemName, opt_O ? opt_O : "BSD4.4 ",
|
|
sizeof(bs->bsOemName));
|
|
memcpy(img + x1, bootcode, sizeof(bootcode));
|
|
mk2(img + MINBPS - 2, DOSMAGIC);
|
|
}
|
|
} else if (fat == 32 && bpb.bpbFSInfo != MAXU16 &&
|
|
(lsn == bpb.bpbFSInfo ||
|
|
(bpb.bpbBackup != MAXU16 &&
|
|
lsn == bpb.bpbBackup + bpb.bpbFSInfo))) {
|
|
mk4(img, 0x41615252);
|
|
mk4(img + MINBPS - 28, 0x61417272);
|
|
mk4(img + MINBPS - 24, 0xffffffff);
|
|
mk4(img + MINBPS - 20, bpb.bpbRootClust);
|
|
mk2(img + MINBPS - 2, DOSMAGIC);
|
|
} else if (lsn >= bpb.bpbResSectors && lsn < dir &&
|
|
!((lsn - bpb.bpbResSectors) %
|
|
(bpb.bpbFATsecs ? bpb.bpbFATsecs : bpb.bpbBigFATsecs))) {
|
|
mk1(img[0], bpb.bpbMedia);
|
|
for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++)
|
|
mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff);
|
|
} else if (lsn == dir && opt_L) {
|
|
de = (struct de *)img;
|
|
mklabel(de->deName, opt_L);
|
|
mk1(de->deAttributes, 050);
|
|
x = (u_int)tm->tm_hour << 11 |
|
|
(u_int)tm->tm_min << 5 |
|
|
(u_int)tm->tm_sec >> 1;
|
|
mk2(de->deMTime, x);
|
|
x = (u_int)(tm->tm_year - 80) << 9 |
|
|
(u_int)(tm->tm_mon + 1) << 5 |
|
|
(u_int)tm->tm_mday;
|
|
mk2(de->deMDate, x);
|
|
}
|
|
if ((n = write(fd, img, bpb.bpbBytesPerSec)) == -1)
|
|
err(1, "%s", fname);
|
|
if ((unsigned)n != bpb.bpbBytesPerSec)
|
|
errx(1, "%s: can't write sector %u", fname, lsn);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Exit with error if file system is mounted.
|
|
*/
|
|
static void
|
|
check_mounted(const char *fname, mode_t mode)
|
|
{
|
|
struct statfs *mp;
|
|
const char *s1, *s2;
|
|
size_t len;
|
|
int n, r;
|
|
|
|
if (!(n = getmntinfo(&mp, MNT_NOWAIT)))
|
|
err(1, "getmntinfo");
|
|
len = strlen(_PATH_DEV);
|
|
s1 = fname;
|
|
if (!strncmp(s1, _PATH_DEV, len))
|
|
s1 += len;
|
|
r = S_ISCHR(mode) && s1 != fname && *s1 == 'r';
|
|
for (; n--; mp++) {
|
|
s2 = mp->f_mntfromname;
|
|
if (!strncmp(s2, _PATH_DEV, len))
|
|
s2 += len;
|
|
if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) ||
|
|
!strcmp(s1, s2))
|
|
errx(1, "%s is mounted on %s", fname, mp->f_mntonname);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get a standard format.
|
|
*/
|
|
static void
|
|
getstdfmt(const char *fmt, struct bpb *bpb)
|
|
{
|
|
u_int x, i;
|
|
|
|
x = sizeof(stdfmt) / sizeof(stdfmt[0]);
|
|
for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++);
|
|
if (i == x)
|
|
errx(1, "%s: unknown standard format", fmt);
|
|
*bpb = stdfmt[i].bpb;
|
|
}
|
|
|
|
/*
|
|
* Get disk slice, partition, and geometry information.
|
|
*/
|
|
static void
|
|
getdiskinfo(int fd, const char *fname, const char *dtype, __unused int oflag,
|
|
struct bpb *bpb)
|
|
{
|
|
struct disklabel *lp, dlp;
|
|
struct fd_type type;
|
|
off_t ms, hs = 0;
|
|
|
|
lp = NULL;
|
|
|
|
/* If the user specified a disk type, try to use that */
|
|
if (dtype != NULL) {
|
|
lp = getdiskbyname(dtype);
|
|
}
|
|
|
|
/* Maybe it's a floppy drive */
|
|
if (lp == NULL) {
|
|
if (ioctl(fd, DIOCGMEDIASIZE, &ms) == -1) {
|
|
struct stat st;
|
|
|
|
if (fstat(fd, &st))
|
|
err(1, "Cannot get disk size");
|
|
/* create a fake geometry for a file image */
|
|
ms = st.st_size;
|
|
dlp.d_secsize = 512;
|
|
dlp.d_nsectors = 63;
|
|
dlp.d_ntracks = 255;
|
|
dlp.d_secperunit = ms / dlp.d_secsize;
|
|
lp = &dlp;
|
|
} else if (ioctl(fd, FD_GTYPE, &type) != -1) {
|
|
dlp.d_secsize = 128 << type.secsize;
|
|
dlp.d_nsectors = type.sectrac;
|
|
dlp.d_ntracks = type.heads;
|
|
dlp.d_secperunit = ms / dlp.d_secsize;
|
|
lp = &dlp;
|
|
}
|
|
}
|
|
|
|
/* Maybe it's a fixed drive */
|
|
if (lp == NULL) {
|
|
if (bpb->bpbBytesPerSec)
|
|
dlp.d_secsize = bpb->bpbBytesPerSec;
|
|
if (ioctl(fd, DIOCGDINFO, &dlp) == -1) {
|
|
if (bpb->bpbBytesPerSec == 0 && ioctl(fd, DIOCGSECTORSIZE, &dlp.d_secsize) == -1)
|
|
errx(1, "Cannot get sector size, %s", strerror(errno));
|
|
|
|
dlp.d_secperunit = ms / dlp.d_secsize;
|
|
|
|
if (bpb->bpbSecPerTrack == 0 && ioctl(fd, DIOCGFWSECTORS, &dlp.d_nsectors) == -1) {
|
|
warnx("Cannot get number of sectors per track, %s", strerror(errno));
|
|
dlp.d_nsectors = 63;
|
|
}
|
|
if (bpb->bpbHeads == 0 && ioctl(fd, DIOCGFWHEADS, &dlp.d_ntracks) == -1) {
|
|
warnx("Cannot get number of heads, %s", strerror(errno));
|
|
if (dlp.d_secperunit <= 63*1*1024)
|
|
dlp.d_ntracks = 1;
|
|
else if (dlp.d_secperunit <= 63*16*1024)
|
|
dlp.d_ntracks = 16;
|
|
else
|
|
dlp.d_ntracks = 255;
|
|
}
|
|
}
|
|
|
|
hs = (ms / dlp.d_secsize) - dlp.d_secperunit;
|
|
lp = &dlp;
|
|
}
|
|
|
|
if (bpb->bpbBytesPerSec == 0)
|
|
bpb->bpbBytesPerSec = ckgeom(fname, lp->d_secsize, "bytes/sector");
|
|
if (bpb->bpbSecPerTrack == 0)
|
|
bpb->bpbSecPerTrack = ckgeom(fname, lp->d_nsectors, "sectors/track");
|
|
if (bpb->bpbHeads == 0)
|
|
bpb->bpbHeads = ckgeom(fname, lp->d_ntracks, "drive heads");
|
|
if (bpb->bpbHugeSectors == 0)
|
|
bpb->bpbHugeSectors = lp->d_secperunit;
|
|
if (bpb->bpbHiddenSecs == 0)
|
|
bpb->bpbHiddenSecs = hs;
|
|
}
|
|
|
|
/*
|
|
* Print out BPB values.
|
|
*/
|
|
static void
|
|
print_bpb(struct bpb *bpb)
|
|
{
|
|
printf("BytesPerSec=%u SecPerClust=%u ResSectors=%u FATs=%u", bpb->bpbBytesPerSec, bpb->bpbSecPerClust, bpb->bpbResSectors,
|
|
bpb->bpbFATs);
|
|
if (bpb->bpbRootDirEnts)
|
|
printf(" RootDirEnts=%u", bpb->bpbRootDirEnts);
|
|
if (bpb->bpbSectors)
|
|
printf(" Sectors=%u", bpb->bpbSectors);
|
|
printf(" Media=%#x", bpb->bpbMedia);
|
|
if (bpb->bpbFATsecs)
|
|
printf(" FATsecs=%u", bpb->bpbFATsecs);
|
|
printf(" SecPerTrack=%u Heads=%u HiddenSecs=%u", bpb->bpbSecPerTrack, bpb->bpbHeads, bpb->bpbHiddenSecs);
|
|
if (bpb->bpbHugeSectors)
|
|
printf(" HugeSectors=%u", bpb->bpbHugeSectors);
|
|
if (!bpb->bpbFATsecs) {
|
|
printf(" FATsecs=%u RootCluster=%u", bpb->bpbBigFATsecs, bpb->bpbRootClust);
|
|
printf(" FSInfo=");
|
|
printf(bpb->bpbFSInfo == MAXU16 ? "%#x" : "%u", bpb->bpbFSInfo);
|
|
printf(" Backup=");
|
|
printf(bpb->bpbBackup == MAXU16 ? "%#x" : "%u", bpb->bpbBackup);
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
/*
|
|
* Check a disk geometry value.
|
|
*/
|
|
static u_int
|
|
ckgeom(const char *fname, u_int val, const char *msg)
|
|
{
|
|
if (!val)
|
|
errx(1, "%s: no default %s", fname, msg);
|
|
if (val > MAXU16)
|
|
errx(1, "%s: illegal %s %d", fname, msg, val);
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* Convert and check a numeric option argument.
|
|
*/
|
|
static u_int
|
|
argtou(const char *arg, u_int lo, u_int hi, const char *msg)
|
|
{
|
|
char *s;
|
|
u_long x;
|
|
|
|
errno = 0;
|
|
x = strtoul(arg, &s, 0);
|
|
if (errno || !*arg || *s || x < lo || x > hi)
|
|
errx(1, "%s: bad %s", arg, msg);
|
|
return x;
|
|
}
|
|
|
|
/*
|
|
* Same for off_t, with optional skmgpP suffix
|
|
*/
|
|
static off_t
|
|
argtooff(const char *arg, const char *msg)
|
|
{
|
|
char *s;
|
|
off_t x;
|
|
|
|
x = strtoll(arg, &s, 0);
|
|
/* allow at most one extra char */
|
|
if (errno || x < 0 || (s[0] && s[1]) )
|
|
errx(1, "%s: bad %s", arg, msg);
|
|
if (*s) { /* the extra char is the multiplier */
|
|
switch (*s) {
|
|
default:
|
|
errx(1, "%s: bad %s", arg, msg);
|
|
/* notreached */
|
|
|
|
case 's': /* sector */
|
|
case 'S':
|
|
x <<= 9; /* times 512 */
|
|
break;
|
|
|
|
case 'k': /* kilobyte */
|
|
case 'K':
|
|
x <<= 10; /* times 1024 */
|
|
break;
|
|
|
|
case 'm': /* megabyte */
|
|
case 'M':
|
|
x <<= 20; /* times 1024*1024 */
|
|
break;
|
|
|
|
case 'g': /* gigabyte */
|
|
case 'G':
|
|
x <<= 30; /* times 1024*1024*1024 */
|
|
break;
|
|
|
|
case 'p': /* partition start */
|
|
case 'P': /* partition start */
|
|
case 'l': /* partition length */
|
|
case 'L': /* partition length */
|
|
errx(1, "%s: not supported yet %s", arg, msg);
|
|
/* notreached */
|
|
}
|
|
}
|
|
return x;
|
|
}
|
|
|
|
/*
|
|
* Check a volume label.
|
|
*/
|
|
static int
|
|
oklabel(const char *src)
|
|
{
|
|
int c, i;
|
|
|
|
for (i = 0; i <= 11; i++) {
|
|
c = (u_char)*src++;
|
|
if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c))
|
|
break;
|
|
}
|
|
return i && !c;
|
|
}
|
|
|
|
/*
|
|
* Make a volume label.
|
|
*/
|
|
static void
|
|
mklabel(u_int8_t *dest, const char *src)
|
|
{
|
|
int c, i;
|
|
|
|
for (i = 0; i < 11; i++) {
|
|
c = *src ? toupper(*src++) : ' ';
|
|
*dest++ = !i && c == '\xe5' ? 5 : c;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Copy string, padding with spaces.
|
|
*/
|
|
static void
|
|
setstr(u_int8_t *dest, const char *src, size_t len)
|
|
{
|
|
while (len--)
|
|
*dest++ = *src ? *src++ : ' ';
|
|
}
|
|
|
|
/*
|
|
* Print usage message.
|
|
*/
|
|
static void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: newfs_msdos [ -options ] special [disktype]\n"
|
|
"where the options are:\n"
|
|
"\t-@ create file system at specified offset\n"
|
|
"\t-B get bootstrap from file\n"
|
|
"\t-C create image file with specified size\n"
|
|
"\t-F FAT type (12, 16, or 32)\n"
|
|
"\t-I volume ID\n"
|
|
"\t-L volume label\n"
|
|
"\t-N don't create file system: just print out parameters\n"
|
|
"\t-O OEM string\n"
|
|
"\t-S bytes/sector\n"
|
|
"\t-a sectors/FAT\n"
|
|
"\t-b block size\n"
|
|
"\t-c sectors/cluster\n"
|
|
"\t-e root directory entries\n"
|
|
"\t-f standard format\n"
|
|
"\t-h drive heads\n"
|
|
"\t-i file system info sector\n"
|
|
"\t-k backup boot sector\n"
|
|
"\t-m media descriptor\n"
|
|
"\t-n number of FATs\n"
|
|
"\t-o hidden sectors\n"
|
|
"\t-r reserved sectors\n"
|
|
"\t-s file system size (sectors)\n"
|
|
"\t-u sectors/track\n");
|
|
exit(1);
|
|
}
|
|
|
|
static void
|
|
infohandler(int sig __unused)
|
|
{
|
|
|
|
got_siginfo = 1;
|
|
}
|