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/* $OpenBSD: newfs_msdos.c,v 1.27 2015/11/23 19:19:30 deraadt Exp $ */ |
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/* |
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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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#include <sys/param.h> /* powerof2 */ |
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#include <sys/stat.h> |
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#include <sys/disklabel.h> |
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#include <sys/ioctl.h> |
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#include <sys/dkio.h> |
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#include <sys/mount.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 <paths.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 <unistd.h> |
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#include <limits.h> |
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#include <util.h> |
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#define MINIMUM(a, b) (((a) < (b)) ? (a) : (b)) |
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#define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b)) |
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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 1 /* minimum FAT12 clusters */ |
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#define MINCLS16 0x1000 /* minimum FAT16 clusters */ |
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#define MINCLS32 2 /* minimum FAT32 clusters */ |
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#define MAXCLS12 0xfed /* maximum FAT12 clusters */ |
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#define MAXCLS16 0xfff5 /* maximum FAT16 clusters */ |
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#define MAXCLS32 0xffffff5 /* 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 jmp[3]; /* bootstrap entry point */ |
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u_int8_t oem[8]; /* OEM name and version */ |
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}; |
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struct bsbpb { |
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u_int8_t bps[2]; /* bytes per sector */ |
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u_int8_t spc; /* sectors per cluster */ |
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u_int8_t res[2]; /* reserved sectors */ |
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u_int8_t nft; /* number of FATs */ |
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u_int8_t rde[2]; /* root directory entries */ |
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u_int8_t sec[2]; /* total sectors */ |
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u_int8_t mid; /* media descriptor */ |
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u_int8_t spf[2]; /* sectors per FAT */ |
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u_int8_t spt[2]; /* sectors per track */ |
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u_int8_t hds[2]; /* drive heads */ |
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u_int8_t hid[4]; /* hidden sectors */ |
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u_int8_t bsec[4]; /* big total sectors */ |
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}; |
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struct bsxbpb { |
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u_int8_t bspf[4]; /* big sectors per FAT */ |
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u_int8_t xflg[2]; /* FAT control flags */ |
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u_int8_t vers[2]; /* file system version */ |
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u_int8_t rdcl[4]; /* root directory start cluster */ |
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u_int8_t infs[2]; /* file system info sector */ |
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u_int8_t bkbs[2]; /* backup boot sector */ |
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u_int8_t rsvd[12]; /* reserved */ |
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}; |
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struct bsx { |
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u_int8_t drv; /* drive number */ |
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u_int8_t rsvd; /* reserved */ |
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u_int8_t sig; /* extended boot signature */ |
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u_int8_t volid[4]; /* volume ID number */ |
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u_int8_t label[11]; /* volume label */ |
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u_int8_t type[8]; /* file system type */ |
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}; |
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struct de { |
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u_int8_t namext[11]; /* name and extension */ |
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u_int8_t attr; /* attributes */ |
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u_int8_t rsvd[10]; /* reserved */ |
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u_int8_t time[2]; /* creation time */ |
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u_int8_t date[2]; /* creation date */ |
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u_int8_t clus[2]; /* starting cluster */ |
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u_int8_t size[4]; /* size */ |
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}; |
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struct bpb { |
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u_int bps; /* bytes per sector */ |
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u_int spc; /* sectors per cluster */ |
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u_int res; /* reserved sectors */ |
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u_int nft; /* number of FATs */ |
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u_int rde; /* root directory entries */ |
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u_int sec; /* total sectors */ |
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u_int mid; /* media descriptor */ |
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u_int spf; /* sectors per FAT */ |
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u_int spt; /* sectors per track */ |
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u_int hds; /* drive heads */ |
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u_int hid; /* hidden sectors */ |
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u_int bsec; /* big total sectors */ |
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u_int bspf; /* big sectors per FAT */ |
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u_int rdcl; /* root directory start cluster */ |
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u_int infs; /* file system info sector */ |
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u_int bkbs; /* backup boot sector */ |
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}; |
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static struct { |
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const char *name; |
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struct bpb bpb; |
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} stdfmt[] = { |
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{"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1}}, |
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{"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1}}, |
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{"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2}}, |
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{"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2}}, |
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{"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2}}, |
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{"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2}}, |
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{"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2}}, |
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{"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2}} |
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}; |
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static 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 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 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 __dead 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 char opts[] = "NB:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:qr:s:t:u:"; |
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static const char *opt_B, *opt_L, *opt_O, *opt_f; |
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static u_int opt_F, opt_I, opt_S, opt_a, opt_b, opt_c, opt_e; |
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static u_int opt_h, opt_i, opt_k, opt_m, opt_n, opt_o, opt_r; |
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static u_int opt_s, opt_u; |
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static int opt_N; |
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static int Iflag, mflag, oflag; |
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char buf[PATH_MAX]; |
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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 *dtype, *bname; |
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char *sname, *fname; |
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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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if (pledge("stdio rpath wpath disklabel cpath", NULL) == -1) |
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err(1, "pledge"); |
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while ((ch = getopt(argc, argv, opts)) != -1) |
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switch (ch) { |
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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 'F': |
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opt_F = strtonum(optarg, 1, INT_MAX, NULL); |
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if (!(opt_F == 12 || opt_F == 16 || opt_F == 32)) |
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errx(1, "%s: bad FAT type", 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 'q': /* Compat with newfs -q */ |
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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 't': /* Compat with newfs -t */ |
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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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sname = *argv++; |
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dtype = *argv; |
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if ((fd = opendev(sname, opt_N ? O_RDONLY : O_RDWR, 0, &fname)) == -1 || |
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fstat(fd, &sb)) |
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err(1, "%s", fname); |
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|
|
if (!opt_N) |
350 |
|
|
check_mounted(fname, sb.st_mode); |
351 |
|
|
if (S_ISBLK(sb.st_mode)) |
352 |
|
|
errx(1, "%s: block device", fname); |
353 |
|
|
if (!S_ISCHR(sb.st_mode)) |
354 |
|
|
warnx("warning: %s is not a character device", fname); |
355 |
|
|
memset(&bpb, 0, sizeof(bpb)); |
356 |
|
|
if (opt_f) { |
357 |
|
|
getstdfmt(opt_f, &bpb); |
358 |
|
|
bpb.bsec = bpb.sec; |
359 |
|
|
bpb.sec = 0; |
360 |
|
|
bpb.bspf = bpb.spf; |
361 |
|
|
bpb.spf = 0; |
362 |
|
|
} |
363 |
|
|
if (opt_h) |
364 |
|
|
bpb.hds = opt_h; |
365 |
|
|
if (opt_u) |
366 |
|
|
bpb.spt = opt_u; |
367 |
|
|
if (opt_S) |
368 |
|
|
bpb.bps = opt_S; |
369 |
|
|
if (opt_s) |
370 |
|
|
bpb.bsec = opt_s; |
371 |
|
|
if (oflag) |
372 |
|
|
bpb.hid = opt_o; |
373 |
|
|
if (!(opt_f || (opt_h && opt_u && opt_S && opt_s && oflag))) |
374 |
|
|
getdiskinfo(fd, fname, dtype, oflag, &bpb); |
375 |
|
|
if (!powerof2(bpb.bps)) |
376 |
|
|
errx(1, "bytes/sector (%u) is not a power of 2", bpb.bps); |
377 |
|
|
if (bpb.bps < MINBPS) |
378 |
|
|
errx(1, "bytes/sector (%u) is too small; minimum is %u", |
379 |
|
|
bpb.bps, MINBPS); |
380 |
|
|
if (!(fat = opt_F)) { |
381 |
|
|
if (opt_f) |
382 |
|
|
fat = 12; |
383 |
|
|
else if (!opt_e && (opt_i || opt_k)) |
384 |
|
|
fat = 32; |
385 |
|
|
} |
386 |
|
|
if ((fat == 32 && opt_e) || (fat != 32 && (opt_i || opt_k))) |
387 |
|
|
errx(1, "-%c is not a legal FAT%s option", |
388 |
|
|
fat == 32 ? 'e' : opt_i ? 'i' : 'k', |
389 |
|
|
fat == 32 ? "32" : "12/16"); |
390 |
|
|
if (opt_f && fat == 32) |
391 |
|
|
bpb.rde = 0; |
392 |
|
|
if (opt_b) { |
393 |
|
|
if (!powerof2(opt_b)) |
394 |
|
|
errx(1, "block size (%u) is not a power of 2", opt_b); |
395 |
|
|
if (opt_b < bpb.bps) |
396 |
|
|
errx(1, "block size (%u) is too small; minimum is %u", |
397 |
|
|
opt_b, bpb.bps); |
398 |
|
|
if (opt_b > bpb.bps * MAXSPC) |
399 |
|
|
errx(1, "block size (%u) is too large; maximum is %u", |
400 |
|
|
opt_b, bpb.bps * MAXSPC); |
401 |
|
|
bpb.spc = opt_b / bpb.bps; |
402 |
|
|
} |
403 |
|
|
if (opt_c) { |
404 |
|
|
if (!powerof2(opt_c)) |
405 |
|
|
errx(1, "sectors/cluster (%u) is not a power of 2", opt_c); |
406 |
|
|
bpb.spc = opt_c; |
407 |
|
|
} |
408 |
|
|
if (opt_r) |
409 |
|
|
bpb.res = opt_r; |
410 |
|
|
if (opt_n) { |
411 |
|
|
if (opt_n > MAXNFT) |
412 |
|
|
errx(1, "number of FATs (%u) is too large; maximum is %u", |
413 |
|
|
opt_n, MAXNFT); |
414 |
|
|
bpb.nft = opt_n; |
415 |
|
|
} |
416 |
|
|
if (opt_e) |
417 |
|
|
bpb.rde = opt_e; |
418 |
|
|
if (mflag) { |
419 |
|
|
if (opt_m < 0xf0) |
420 |
|
|
errx(1, "illegal media descriptor (%#x)", opt_m); |
421 |
|
|
bpb.mid = opt_m; |
422 |
|
|
} |
423 |
|
|
if (opt_a) |
424 |
|
|
bpb.bspf = opt_a; |
425 |
|
|
if (opt_i) |
426 |
|
|
bpb.infs = opt_i; |
427 |
|
|
if (opt_k) |
428 |
|
|
bpb.bkbs = opt_k; |
429 |
|
|
bss = 1; |
430 |
|
|
bname = NULL; |
431 |
|
|
fd1 = -1; |
432 |
|
|
if (opt_B) { |
433 |
|
|
bname = opt_B; |
434 |
|
|
if (!strchr(bname, '/')) { |
435 |
|
|
snprintf(buf, sizeof(buf), "/boot/%s", bname); |
436 |
|
|
if (!(bname = strdup(buf))) |
437 |
|
|
err(1, NULL); |
438 |
|
|
} |
439 |
|
|
if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) |
440 |
|
|
err(1, "%s", bname); |
441 |
|
|
if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bps || |
442 |
|
|
sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU16) |
443 |
|
|
errx(1, "%s: inappropriate file type or format", bname); |
444 |
|
|
bss = sb.st_size / bpb.bps; |
445 |
|
|
} |
446 |
|
|
if (!bpb.nft) |
447 |
|
|
bpb.nft = 2; |
448 |
|
|
if (!fat) { |
449 |
|
|
if (bpb.bsec < (bpb.res ? bpb.res : bss) + |
450 |
|
|
howmany((RESFTE + (bpb.spc ? MINCLS16 : MAXCLS12 + 1)) * |
451 |
|
|
((bpb.spc ? 16 : 12) / BPN), bpb.bps * NPB) * |
452 |
|
|
bpb.nft + |
453 |
|
|
howmany(bpb.rde ? bpb.rde : DEFRDE, |
454 |
|
|
bpb.bps / sizeof(struct de)) + |
455 |
|
|
(bpb.spc ? MINCLS16 : MAXCLS12 + 1) * |
456 |
|
|
(bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps))) |
457 |
|
|
fat = 12; |
458 |
|
|
else if (bpb.rde || bpb.bsec < |
459 |
|
|
(bpb.res ? bpb.res : bss) + |
460 |
|
|
howmany((RESFTE + MAXCLS16) * 2, bpb.bps) * bpb.nft + |
461 |
|
|
howmany(DEFRDE, bpb.bps / sizeof(struct de)) + |
462 |
|
|
(MAXCLS16 + 1) * |
463 |
|
|
(bpb.spc ? bpb.spc : howmany(8192, bpb.bps))) |
464 |
|
|
fat = 16; |
465 |
|
|
else |
466 |
|
|
fat = 32; |
467 |
|
|
} |
468 |
|
|
x = bss; |
469 |
|
|
if (fat == 32) { |
470 |
|
|
if (!bpb.infs) { |
471 |
|
|
if (x == MAXU16 || x == bpb.bkbs) |
472 |
|
|
errx(1, "no room for info sector"); |
473 |
|
|
bpb.infs = x; |
474 |
|
|
} |
475 |
|
|
if (bpb.infs != MAXU16 && x <= bpb.infs) |
476 |
|
|
x = bpb.infs + 1; |
477 |
|
|
if (!bpb.bkbs) { |
478 |
|
|
if (x == MAXU16) |
479 |
|
|
errx(1, "no room for backup sector"); |
480 |
|
|
bpb.bkbs = x; |
481 |
|
|
} else if (bpb.bkbs != MAXU16 && bpb.bkbs == bpb.infs) |
482 |
|
|
errx(1, "backup sector would overwrite info sector"); |
483 |
|
|
if (bpb.bkbs != MAXU16 && x <= bpb.bkbs) |
484 |
|
|
x = bpb.bkbs + 1; |
485 |
|
|
} |
486 |
|
|
if (!bpb.res) |
487 |
|
|
bpb.res = fat == 32 ? MAXIMUM(x, MAXIMUM(16384 / bpb.bps, 4)) : x; |
488 |
|
|
else if (bpb.res < x) |
489 |
|
|
errx(1, "too few reserved sectors"); |
490 |
|
|
if (fat != 32 && !bpb.rde) |
491 |
|
|
bpb.rde = DEFRDE; |
492 |
|
|
rds = howmany(bpb.rde, bpb.bps / sizeof(struct de)); |
493 |
|
|
if (!bpb.spc) |
494 |
|
|
for (bpb.spc = howmany(fat == 16 ? DEFBLK16 : DEFBLK, bpb.bps); |
495 |
|
|
bpb.spc < MAXSPC && |
496 |
|
|
bpb.res + |
497 |
|
|
howmany((RESFTE + maxcls(fat)) * (fat / BPN), |
498 |
|
|
bpb.bps * NPB) * bpb.nft + |
499 |
|
|
rds + |
500 |
|
|
(u_int64_t)(maxcls(fat) + 1) * bpb.spc <= bpb.bsec; |
501 |
|
|
bpb.spc <<= 1); |
502 |
|
|
if (fat != 32 && bpb.bspf > MAXU16) |
503 |
|
|
errx(1, "too many sectors/FAT for FAT12/16"); |
504 |
|
|
x1 = bpb.res + rds; |
505 |
|
|
x = bpb.bspf ? bpb.bspf : 1; |
506 |
|
|
if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) |
507 |
|
|
errx(1, "meta data exceeds file system size"); |
508 |
|
|
x1 += x * bpb.nft; |
509 |
|
|
x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB / |
510 |
|
|
(bpb.spc * bpb.bps * NPB + fat / BPN * bpb.nft); |
511 |
|
|
x2 = howmany((RESFTE + MINIMUM(x, maxcls(fat))) * (fat / BPN), |
512 |
|
|
bpb.bps * NPB); |
513 |
|
|
if (!bpb.bspf) { |
514 |
|
|
bpb.bspf = x2; |
515 |
|
|
x1 += (bpb.bspf - 1) * bpb.nft; |
516 |
|
|
} |
517 |
|
|
cls = (bpb.bsec - x1) / bpb.spc; |
518 |
|
|
x = (u_int64_t)bpb.bspf * bpb.bps * NPB / (fat / BPN) - RESFTE; |
519 |
|
|
if (cls > x) |
520 |
|
|
cls = x; |
521 |
|
|
if (bpb.bspf < x2) |
522 |
|
|
warnx("warning: sectors/FAT limits file system to %u clusters", |
523 |
|
|
cls); |
524 |
|
|
if (cls < mincls(fat)) |
525 |
|
|
errx(1, "%u clusters too few clusters for FAT%u, need %u", cls, fat, |
526 |
|
|
mincls(fat)); |
527 |
|
|
if (cls > maxcls(fat)) { |
528 |
|
|
cls = maxcls(fat); |
529 |
|
|
bpb.bsec = x1 + (cls + 1) * bpb.spc - 1; |
530 |
|
|
warnx("warning: FAT type limits file system to %u sectors", |
531 |
|
|
bpb.bsec); |
532 |
|
|
} |
533 |
|
|
printf("%s: %u sector%s in %u FAT%u cluster%s " |
534 |
|
|
"(%u bytes/cluster)\n", fname, cls * bpb.spc, |
535 |
|
|
cls * bpb.spc == 1 ? "" : "s", cls, fat, |
536 |
|
|
cls == 1 ? "" : "s", bpb.bps * bpb.spc); |
537 |
|
|
if (!bpb.mid) |
538 |
|
|
bpb.mid = !bpb.hid ? 0xf0 : 0xf8; |
539 |
|
|
if (fat == 32) |
540 |
|
|
bpb.rdcl = RESFTE; |
541 |
|
|
if (bpb.hid + bpb.bsec <= MAXU16) { |
542 |
|
|
bpb.sec = bpb.bsec; |
543 |
|
|
bpb.bsec = 0; |
544 |
|
|
} |
545 |
|
|
if (fat != 32) { |
546 |
|
|
bpb.spf = bpb.bspf; |
547 |
|
|
bpb.bspf = 0; |
548 |
|
|
} |
549 |
|
|
print_bpb(&bpb); |
550 |
|
|
if (!opt_N) { |
551 |
|
|
gettimeofday(&tv, NULL); |
552 |
|
|
now = tv.tv_sec; |
553 |
|
|
tm = localtime(&now); |
554 |
|
|
if (!(img = malloc(bpb.bps))) |
555 |
|
|
err(1, NULL); |
556 |
|
|
dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft; |
557 |
|
|
for (lsn = 0; lsn < dir + (fat == 32 ? bpb.spc : rds); lsn++) { |
558 |
|
|
x = lsn; |
559 |
|
|
if (opt_B && |
560 |
|
|
fat == 32 && bpb.bkbs != MAXU16 && |
561 |
|
|
bss <= bpb.bkbs && x >= bpb.bkbs) { |
562 |
|
|
x -= bpb.bkbs; |
563 |
|
|
if (!x && lseek(fd1, 0, SEEK_SET)) |
564 |
|
|
err(1, "%s", bname); |
565 |
|
|
} |
566 |
|
|
if (opt_B && x < bss) { |
567 |
|
|
if ((n = read(fd1, img, bpb.bps)) == -1) |
568 |
|
|
err(1, "%s", bname); |
569 |
|
|
if (n != bpb.bps) |
570 |
|
|
errx(1, "%s: can't read sector %u", bname, x); |
571 |
|
|
} else |
572 |
|
|
memset(img, 0, bpb.bps); |
573 |
|
|
if (!lsn || |
574 |
|
|
(fat == 32 && bpb.bkbs != MAXU16 && lsn == bpb.bkbs)) { |
575 |
|
|
x1 = sizeof(struct bs); |
576 |
|
|
bsbpb = (struct bsbpb *)(img + x1); |
577 |
|
|
mk2(bsbpb->bps, bpb.bps); |
578 |
|
|
mk1(bsbpb->spc, bpb.spc); |
579 |
|
|
mk2(bsbpb->res, bpb.res); |
580 |
|
|
mk1(bsbpb->nft, bpb.nft); |
581 |
|
|
mk2(bsbpb->rde, bpb.rde); |
582 |
|
|
mk2(bsbpb->sec, bpb.sec); |
583 |
|
|
mk1(bsbpb->mid, bpb.mid); |
584 |
|
|
mk2(bsbpb->spf, bpb.spf); |
585 |
|
|
mk2(bsbpb->spt, bpb.spt); |
586 |
|
|
mk2(bsbpb->hds, bpb.hds); |
587 |
|
|
mk4(bsbpb->hid, bpb.hid); |
588 |
|
|
mk4(bsbpb->bsec, bpb.bsec); |
589 |
|
|
x1 += sizeof(struct bsbpb); |
590 |
|
|
if (fat == 32) { |
591 |
|
|
bsxbpb = (struct bsxbpb *)(img + x1); |
592 |
|
|
mk4(bsxbpb->bspf, bpb.bspf); |
593 |
|
|
mk2(bsxbpb->xflg, 0); |
594 |
|
|
mk2(bsxbpb->vers, 0); |
595 |
|
|
mk4(bsxbpb->rdcl, bpb.rdcl); |
596 |
|
|
mk2(bsxbpb->infs, bpb.infs); |
597 |
|
|
mk2(bsxbpb->bkbs, bpb.bkbs); |
598 |
|
|
x1 += sizeof(struct bsxbpb); |
599 |
|
|
} |
600 |
|
|
bsx = (struct bsx *)(img + x1); |
601 |
|
|
mk1(bsx->sig, 0x29); |
602 |
|
|
if (Iflag) |
603 |
|
|
x = opt_I; |
604 |
|
|
else |
605 |
|
|
x = (((u_int)(1 + tm->tm_mon) << 8 | |
606 |
|
|
(u_int)tm->tm_mday) + |
607 |
|
|
((u_int)tm->tm_sec << 8 | |
608 |
|
|
(u_int)(tv.tv_usec / 10))) << 16 | |
609 |
|
|
((u_int)(1900 + tm->tm_year) + |
610 |
|
|
((u_int)tm->tm_hour << 8 | |
611 |
|
|
(u_int)tm->tm_min)); |
612 |
|
|
mk4(bsx->volid, x); |
613 |
|
|
mklabel(bsx->label, opt_L ? opt_L : "NO NAME"); |
614 |
|
|
snprintf(buf, sizeof buf, "FAT%u", fat); |
615 |
|
|
setstr(bsx->type, buf, sizeof(bsx->type)); |
616 |
|
|
if (!opt_B) { |
617 |
|
|
x1 += sizeof(struct bsx); |
618 |
|
|
bs = (struct bs *)img; |
619 |
|
|
mk1(bs->jmp[0], 0xeb); |
620 |
|
|
mk1(bs->jmp[1], x1 - 2); |
621 |
|
|
mk1(bs->jmp[2], 0x90); |
622 |
|
|
setstr(bs->oem, opt_O ? opt_O : "BSD 4.4", |
623 |
|
|
sizeof(bs->oem)); |
624 |
|
|
memcpy(img + x1, bootcode, sizeof(bootcode)); |
625 |
|
|
mk2(img + MINBPS - 2, DOSMAGIC); |
626 |
|
|
} |
627 |
|
|
} else if (fat == 32 && bpb.infs != MAXU16 && |
628 |
|
|
(lsn == bpb.infs || |
629 |
|
|
(bpb.bkbs != MAXU16 && |
630 |
|
|
lsn == bpb.bkbs + bpb.infs))) { |
631 |
|
|
mk4(img, 0x41615252); |
632 |
|
|
mk4(img + MINBPS - 28, 0x61417272); |
633 |
|
|
mk4(img + MINBPS - 24, 0xffffffff); |
634 |
|
|
mk4(img + MINBPS - 20, 0xffffffff); |
635 |
|
|
mk2(img + MINBPS - 2, DOSMAGIC); |
636 |
|
|
} else if (lsn >= bpb.res && lsn < dir && |
637 |
|
|
!((lsn - bpb.res) % |
638 |
|
|
(bpb.spf ? bpb.spf : bpb.bspf))) { |
639 |
|
|
mk1(img[0], bpb.mid); |
640 |
|
|
for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++) |
641 |
|
|
mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff); |
642 |
|
|
} else if (lsn == dir && opt_L) { |
643 |
|
|
de = (struct de *)img; |
644 |
|
|
mklabel(de->namext, opt_L); |
645 |
|
|
mk1(de->attr, 050); |
646 |
|
|
x = (u_int)tm->tm_hour << 11 | |
647 |
|
|
(u_int)tm->tm_min << 5 | |
648 |
|
|
(u_int)tm->tm_sec >> 1; |
649 |
|
|
mk2(de->time, x); |
650 |
|
|
x = (u_int)(tm->tm_year - 80) << 9 | |
651 |
|
|
(u_int)(tm->tm_mon + 1) << 5 | |
652 |
|
|
(u_int)tm->tm_mday; |
653 |
|
|
mk2(de->date, x); |
654 |
|
|
} |
655 |
|
|
if ((n = write(fd, img, bpb.bps)) == -1) |
656 |
|
|
err(1, "%s", fname); |
657 |
|
|
if (n != bpb.bps) |
658 |
|
|
errx(1, "%s: can't write sector %u", fname, lsn); |
659 |
|
|
} |
660 |
|
|
} |
661 |
|
|
return 0; |
662 |
|
|
} |
663 |
|
|
|
664 |
|
|
/* |
665 |
|
|
* Exit with error if file system is mounted. |
666 |
|
|
*/ |
667 |
|
|
static void |
668 |
|
|
check_mounted(const char *fname, mode_t mode) |
669 |
|
|
{ |
670 |
|
|
struct statfs *mp; |
671 |
|
|
const char *s1, *s2; |
672 |
|
|
size_t len; |
673 |
|
|
int n, r; |
674 |
|
|
|
675 |
|
|
if (!(n = getmntinfo(&mp, MNT_NOWAIT))) |
676 |
|
|
err(1, "getmntinfo"); |
677 |
|
|
len = sizeof(_PATH_DEV) - 1; |
678 |
|
|
s1 = fname; |
679 |
|
|
if (!strncmp(s1, _PATH_DEV, len)) |
680 |
|
|
s1 += len; |
681 |
|
|
r = S_ISCHR(mode) && s1 != fname && *s1 == 'r'; |
682 |
|
|
for (; n--; mp++) { |
683 |
|
|
s2 = mp->f_mntfromname; |
684 |
|
|
if (!strncmp(s2, _PATH_DEV, len)) |
685 |
|
|
s2 += len; |
686 |
|
|
if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) || |
687 |
|
|
!strcmp(s1, s2)) |
688 |
|
|
errx(1, "%s is mounted on %s", fname, mp->f_mntonname); |
689 |
|
|
} |
690 |
|
|
} |
691 |
|
|
|
692 |
|
|
/* |
693 |
|
|
* Get a standard format. |
694 |
|
|
*/ |
695 |
|
|
static void |
696 |
|
|
getstdfmt(const char *fmt, struct bpb *bpb) |
697 |
|
|
{ |
698 |
|
|
u_int x, i; |
699 |
|
|
|
700 |
|
|
x = sizeof(stdfmt) / sizeof(stdfmt[0]); |
701 |
|
|
for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++); |
702 |
|
|
if (i == x) |
703 |
|
|
errx(1, "%s: unknown standard format", fmt); |
704 |
|
|
*bpb = stdfmt[i].bpb; |
705 |
|
|
} |
706 |
|
|
|
707 |
|
|
/* |
708 |
|
|
* Get disk slice, partition, and geometry information. |
709 |
|
|
*/ |
710 |
|
|
static void |
711 |
|
|
getdiskinfo(int fd, const char *fname, const char *dtype, int oflag, |
712 |
|
|
struct bpb *bpb) |
713 |
|
|
{ |
714 |
|
|
struct disklabel dl, *lp; |
715 |
|
|
const char *s1, *s2; |
716 |
|
|
int part, i; |
717 |
|
|
|
718 |
|
|
part = -1; |
719 |
|
|
s1 = fname; |
720 |
|
|
if ((s2 = strrchr(s1, '/'))) |
721 |
|
|
s1 = s2 + 1; |
722 |
|
|
for (s2 = s1; *s2 && !isdigit((unsigned char)*s2); s2++); |
723 |
|
|
if (!*s2 || s2 == s1) |
724 |
|
|
s2 = NULL; |
725 |
|
|
else |
726 |
|
|
while (isdigit((unsigned char)*++s2)); |
727 |
|
|
s1 = s2; |
728 |
|
|
if (s2 && *s2 >= 'a' && *s2 <= 'a' + MAXPARTITIONS - 1) { |
729 |
|
|
part = *s2++ - 'a'; |
730 |
|
|
} |
731 |
|
|
if (!s2 || (*s2 && *s2 != '.')) |
732 |
|
|
errx(1, "%s: can't figure out partition info", fname); |
733 |
|
|
if ((((!oflag && part != -1) || !bpb->bsec)) || |
734 |
|
|
!bpb->bps || !bpb->spt || !bpb->hds) { |
735 |
|
|
lp = &dl; |
736 |
|
|
i = ioctl(fd, DIOCGDINFO, lp); |
737 |
|
|
if (i == -1) { |
738 |
|
|
if (!dtype) { |
739 |
|
|
warn("ioctl (GDINFO)"); |
740 |
|
|
errx(1, "%s: can't read disk label; " |
741 |
|
|
"disk type must be specified", fname); |
742 |
|
|
} else if (!(lp = getdiskbyname(dtype))) |
743 |
|
|
errx(1, "%s: unknown disk type", dtype); |
744 |
|
|
} |
745 |
|
|
if (part == -1) |
746 |
|
|
part = RAW_PART; |
747 |
|
|
if (part >= lp->d_npartitions || |
748 |
|
|
!DL_GETPSIZE(&lp->d_partitions[part])) |
749 |
|
|
errx(1, "%s: partition is unavailable", fname); |
750 |
|
|
if (!oflag && part != -1) |
751 |
|
|
bpb->hid += DL_GETPOFFSET(&lp->d_partitions[part]); |
752 |
|
|
if (!bpb->bsec) |
753 |
|
|
bpb->bsec = DL_GETPSIZE(&lp->d_partitions[part]); |
754 |
|
|
if (!bpb->bps) |
755 |
|
|
bpb->bps = ckgeom(fname, lp->d_secsize, "bytes/sector"); |
756 |
|
|
if (!bpb->spt) |
757 |
|
|
bpb->spt = ckgeom(fname, lp->d_nsectors, "sectors/track"); |
758 |
|
|
if (!bpb->hds) |
759 |
|
|
bpb->hds = ckgeom(fname, lp->d_ntracks, "drive heads"); |
760 |
|
|
if (bpb->spt > 63) { |
761 |
|
|
bpb->hds = bpb->hds * bpb->spt / 63; |
762 |
|
|
bpb->spt = 63; |
763 |
|
|
} |
764 |
|
|
} |
765 |
|
|
} |
766 |
|
|
|
767 |
|
|
/* |
768 |
|
|
* Print out BPB values. |
769 |
|
|
*/ |
770 |
|
|
static void |
771 |
|
|
print_bpb(struct bpb *bpb) |
772 |
|
|
{ |
773 |
|
|
printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res, |
774 |
|
|
bpb->nft); |
775 |
|
|
if (bpb->rde) |
776 |
|
|
printf(" rde=%u", bpb->rde); |
777 |
|
|
if (bpb->sec) |
778 |
|
|
printf(" sec=%u", bpb->sec); |
779 |
|
|
printf(" mid=%#x", bpb->mid); |
780 |
|
|
if (bpb->spf) |
781 |
|
|
printf(" spf=%u", bpb->spf); |
782 |
|
|
printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid); |
783 |
|
|
if (bpb->bsec) |
784 |
|
|
printf(" bsec=%u", bpb->bsec); |
785 |
|
|
if (!bpb->spf) { |
786 |
|
|
printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl); |
787 |
|
|
printf(" infs="); |
788 |
|
|
printf(bpb->infs == MAXU16 ? "%#x" : "%u", bpb->infs); |
789 |
|
|
printf(" bkbs="); |
790 |
|
|
printf(bpb->bkbs == MAXU16 ? "%#x" : "%u", bpb->bkbs); |
791 |
|
|
} |
792 |
|
|
printf("\n"); |
793 |
|
|
} |
794 |
|
|
|
795 |
|
|
/* |
796 |
|
|
* Check a disk geometry value. |
797 |
|
|
*/ |
798 |
|
|
static u_int |
799 |
|
|
ckgeom(const char *fname, u_int val, const char *msg) |
800 |
|
|
{ |
801 |
|
|
if (!val) |
802 |
|
|
errx(1, "%s: no default %s", fname, msg); |
803 |
|
|
if (val > MAXU16) |
804 |
|
|
errx(1, "%s: illegal %s", fname, msg); |
805 |
|
|
return val; |
806 |
|
|
} |
807 |
|
|
|
808 |
|
|
/* |
809 |
|
|
* Convert and check a numeric option argument. |
810 |
|
|
*/ |
811 |
|
|
static u_int |
812 |
|
|
argtou(const char *arg, u_int lo, u_int hi, const char *msg) |
813 |
|
|
{ |
814 |
|
|
char *s; |
815 |
|
|
u_long x; |
816 |
|
|
|
817 |
|
|
errno = 0; |
818 |
|
|
x = strtoul(arg, &s, 0); |
819 |
|
|
if (errno || !*arg || *s || x < lo || x > hi) |
820 |
|
|
errx(1, "%s: bad %s", arg, msg); |
821 |
|
|
return x; |
822 |
|
|
} |
823 |
|
|
|
824 |
|
|
/* |
825 |
|
|
* Check a volume label. |
826 |
|
|
*/ |
827 |
|
|
static int |
828 |
|
|
oklabel(const char *src) |
829 |
|
|
{ |
830 |
|
|
int c = 0, i; |
831 |
|
|
|
832 |
|
|
for (i = 0; i <= 11; i++) { |
833 |
|
|
c = (u_char)*src++; |
834 |
|
|
if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) |
835 |
|
|
break; |
836 |
|
|
} |
837 |
|
|
return i && !c; |
838 |
|
|
} |
839 |
|
|
|
840 |
|
|
/* |
841 |
|
|
* Make a volume label. |
842 |
|
|
*/ |
843 |
|
|
static void |
844 |
|
|
mklabel(u_int8_t *dest, const char *src) |
845 |
|
|
{ |
846 |
|
|
int c, i; |
847 |
|
|
|
848 |
|
|
for (i = 0; i < 11; i++) { |
849 |
|
|
c = *src ? toupper((unsigned char)*src++) : ' '; |
850 |
|
|
*dest++ = !i && c == '\xe5' ? 5 : c; |
851 |
|
|
} |
852 |
|
|
} |
853 |
|
|
|
854 |
|
|
/* |
855 |
|
|
* Copy string, padding with spaces. |
856 |
|
|
*/ |
857 |
|
|
static void |
858 |
|
|
setstr(u_int8_t *dest, const char *src, size_t len) |
859 |
|
|
{ |
860 |
|
|
while (len--) |
861 |
|
|
*dest++ = *src ? *src++ : ' '; |
862 |
|
|
} |
863 |
|
|
|
864 |
|
|
/* |
865 |
|
|
* Print usage message. |
866 |
|
|
*/ |
867 |
|
|
static __dead void |
868 |
|
|
usage(void) |
869 |
|
|
{ |
870 |
|
|
extern const char *__progname; |
871 |
|
|
|
872 |
|
|
fprintf(stderr, "usage: %s " |
873 |
|
|
"[-N] [-a FAT-size] [-B boot] [-b block-size]\n" |
874 |
|
|
"\t[-c cluster-size] [-e dirents] [-F FAT-type] [-f format]\n" |
875 |
|
|
"\t[-h heads] [-I volid] [-i info] [-k backup] [-L label]\n" |
876 |
|
|
"\t[-m media] [-n FATs] [-O OEM] [-o hidden] [-r reserved]\n" |
877 |
|
|
"\t[-S sector-size] [-s total] [-u track-size] special\n" |
878 |
|
|
"\t[disktype]\n", |
879 |
|
|
__progname); |
880 |
|
|
exit(1); |
881 |
|
|
} |