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/* $OpenBSD: mkfs_msdos.c,v 1.5 2017/11/02 11:06:54 jca Exp $ */ |
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/* $NetBSD: mkfs_msdos.c,v 1.10 2016/04/03 11:00:13 mlelstv 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> |
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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 <paths.h> |
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#include <stdio.h> |
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#include <stdint.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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#include <signal.h> |
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#include <util.h> |
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#include <disktab.h> |
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#include "makefs.h" |
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#include "msdos/mkfs_msdos.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 1 /* minimum FAT12 clusters */ |
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#define MINCLS16 0xff5 /* minimum FAT16 clusters */ |
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#define MINCLS32 0xfff5 /* minimum FAT32 clusters */ |
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#define MAXCLS12 0xff4 /* maximum FAT12 clusters */ |
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#define MAXCLS16 0xfff4 /* maximum FAT16 clusters */ |
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#define MAXCLS32 0xffffff4 /* maximum FAT32 clusters */ |
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#define mincls(fat_type) ((fat_type) == 12 ? MINCLS12 : \ |
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(fat_type) == 16 ? MINCLS16 : \ |
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MINCLS32) |
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#define maxcls(fat_type) ((fat_type) == 12 ? MAXCLS12 : \ |
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(fat_type) == 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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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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#define INIT(a, b, c, d, e, f, g, h, i, j) \ |
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{ .bps = a, .spc = b, .res = c, .nft = d, .rde = e, \ |
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.sec = f, .mid = g, .spf = h, .spt = i, .hds = 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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} 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 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 int got_siginfo = 0; /* received a SIGINFO */ |
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static int getstdfmt(const char *, struct bpb *); |
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static int getbpbinfo(int, const char *, const char *, int, struct bpb *, int); |
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static void print_bpb(struct bpb *); |
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static int ckgeom(const char *, 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 void infohandler(int sig); |
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int |
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mkfs_msdos(const char *fname, const char *dtype, const struct msdos_options *op) |
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{ |
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char buf[MAXPATHLEN]; |
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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 *bname; |
239 |
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ssize_t n; |
240 |
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time_t now; |
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u_int bss, rds, cls, dir, lsn, x, x1, x2; |
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int ch, fd, fd1; |
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struct msdos_options o = *op; |
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int oflags = O_RDWR | O_CREAT; |
245 |
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246 |
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if (o.block_size && o.sectors_per_cluster) { |
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warnx("Cannot specify both block size and sectors per cluster"); |
248 |
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return -1; |
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} |
250 |
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if (o.OEM_string && strlen(o.OEM_string) > 8) { |
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warnx("%s: bad OEM string", o.OEM_string); |
252 |
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return -1; |
253 |
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} |
254 |
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if (o.create_size) { |
255 |
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if (o.offset == 0) |
256 |
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oflags |= O_TRUNC; |
257 |
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fd = open(fname, oflags, 0644); |
258 |
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if (fd == -1) { |
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warnx("failed to create %s", fname); |
260 |
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return -1; |
261 |
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} |
262 |
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(void)lseek(fd, o.create_size - 1, SEEK_SET); |
263 |
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if (write(fd, "\0", 1) != 1) { |
264 |
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warn("failed to set file size"); |
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return -1; |
266 |
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} |
267 |
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(void)lseek(fd, 0, SEEK_SET); |
268 |
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} else if ((fd = open(fname, O_RDWR)) == -1 || |
269 |
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fstat(fd, &sb)) { |
270 |
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warn("%s", fname); |
271 |
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return -1; |
272 |
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} |
273 |
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if (!S_ISCHR(sb.st_mode) && !o.create_size) { |
274 |
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warnx("warning, %s is not a character device", fname); |
275 |
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return -1; |
276 |
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} |
277 |
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if (o.offset && o.offset != lseek(fd, o.offset, SEEK_SET)) { |
278 |
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warnx("cannot seek to %jd", (intmax_t)o.offset); |
279 |
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return -1; |
280 |
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} |
281 |
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memset(&bpb, 0, sizeof(bpb)); |
282 |
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if (o.floppy) { |
283 |
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if (getstdfmt(o.floppy, &bpb) == -1) |
284 |
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return -1; |
285 |
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bpb.bsec = bpb.sec; |
286 |
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bpb.sec = 0; |
287 |
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bpb.bspf = bpb.spf; |
288 |
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bpb.spf = 0; |
289 |
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} |
290 |
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if (o.drive_heads) |
291 |
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bpb.hds = o.drive_heads; |
292 |
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if (o.sectors_per_track) |
293 |
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bpb.spt = o.sectors_per_track; |
294 |
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if (o.bytes_per_sector) |
295 |
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bpb.bps = o.bytes_per_sector; |
296 |
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if (o.size) |
297 |
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bpb.bsec = o.size; |
298 |
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if (o.hidden_sectors_set) |
299 |
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bpb.hid = o.hidden_sectors; |
300 |
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if (!(o.floppy || (o.drive_heads && o.sectors_per_track && |
301 |
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o.bytes_per_sector && o.size && o.hidden_sectors_set))) { |
302 |
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if (getbpbinfo(fd, fname, dtype, o.hidden_sectors_set, &bpb, |
303 |
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o.create_size != 0) == -1) |
304 |
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return -1; |
305 |
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bpb.bsec -= (o.offset / bpb.bps); |
306 |
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if (bpb.spc == 0) { /* set defaults */ |
307 |
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/* minimum cluster size */ |
308 |
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switch (o.fat_type) { |
309 |
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case 12: |
310 |
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bpb.spc = 1; /* use 512 bytes */ |
311 |
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x = 2; /* up to 2MB */ |
312 |
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break; |
313 |
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case 16: |
314 |
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bpb.spc = 1; /* use 512 bytes */ |
315 |
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x = 32; /* up to 32MB */ |
316 |
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break; |
317 |
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default: |
318 |
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bpb.spc = 8; /* use 4k */ |
319 |
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x = 8192; /* up to 8GB */ |
320 |
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break; |
321 |
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} |
322 |
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x1 = howmany(bpb.bsec, (1048576 / 512)); /* -> MB */ |
323 |
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while (bpb.spc < 128 && x < x1) { |
324 |
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x *= 2; |
325 |
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bpb.spc *= 2; |
326 |
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} |
327 |
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} |
328 |
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} |
329 |
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330 |
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if (o.volume_label && !oklabel(o.volume_label)) { |
331 |
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warnx("%s: bad volume label", o.volume_label); |
332 |
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return -1; |
333 |
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} |
334 |
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335 |
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switch (o.fat_type) { |
336 |
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case 0: |
337 |
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if (o.floppy) |
338 |
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o.fat_type = 12; |
339 |
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else if (!o.directory_entries && (o.info_sector || o.backup_sector)) |
340 |
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o.fat_type = 32; |
341 |
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break; |
342 |
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case 12: |
343 |
|
|
case 16: |
344 |
|
|
if (o.info_sector) { |
345 |
|
|
warnx("Cannot specify info sector with FAT%u", o.fat_type); |
346 |
|
|
return -1; |
347 |
|
|
} |
348 |
|
|
if (o.backup_sector) { |
349 |
|
|
warnx("Cannot specify backup sector with FAT%u", o.fat_type); |
350 |
|
|
return -1; |
351 |
|
|
} |
352 |
|
|
break; |
353 |
|
|
case 32: |
354 |
|
|
if (o.directory_entries) { |
355 |
|
|
warnx("Cannot specify directory entries with FAT32"); |
356 |
|
|
return -1; |
357 |
|
|
} |
358 |
|
|
break; |
359 |
|
|
default: |
360 |
|
|
warnx("%d: bad FAT type", o.fat_type); |
361 |
|
|
return -1; |
362 |
|
|
} |
363 |
|
|
if (!powerof2(bpb.bps)) { |
364 |
|
|
warnx("bytes/sector (%u) is not a power of 2", bpb.bps); |
365 |
|
|
return -1; |
366 |
|
|
} |
367 |
|
|
if (bpb.bps < MINBPS) { |
368 |
|
|
warnx("bytes/sector (%u) is too small; minimum is %u", |
369 |
|
|
bpb.bps, MINBPS); |
370 |
|
|
return -1; |
371 |
|
|
} |
372 |
|
|
|
373 |
|
|
if (o.floppy && o.fat_type == 32) |
374 |
|
|
bpb.rde = 0; |
375 |
|
|
if (o.block_size) { |
376 |
|
|
if (!powerof2(o.block_size)) { |
377 |
|
|
warnx("block size (%u) is not a power of 2", o.block_size); |
378 |
|
|
return -1; |
379 |
|
|
} |
380 |
|
|
if (o.block_size < bpb.bps) { |
381 |
|
|
warnx("block size (%u) is too small; minimum is %u", |
382 |
|
|
o.block_size, bpb.bps); |
383 |
|
|
return -1; |
384 |
|
|
} |
385 |
|
|
if (o.block_size > bpb.bps * MAXSPC) { |
386 |
|
|
warnx("block size (%u) is too large; maximum is %u", |
387 |
|
|
o.block_size, bpb.bps * MAXSPC); |
388 |
|
|
return -1; |
389 |
|
|
} |
390 |
|
|
bpb.spc = o.block_size / bpb.bps; |
391 |
|
|
} |
392 |
|
|
if (o.sectors_per_cluster) { |
393 |
|
|
if (!powerof2(o.sectors_per_cluster)) { |
394 |
|
|
warnx("sectors/cluster (%u) is not a power of 2", |
395 |
|
|
o.sectors_per_cluster); |
396 |
|
|
return -1; |
397 |
|
|
} |
398 |
|
|
bpb.spc = o.sectors_per_cluster; |
399 |
|
|
} |
400 |
|
|
if (o.reserved_sectors) |
401 |
|
|
bpb.res = o.reserved_sectors; |
402 |
|
|
if (o.num_FAT) { |
403 |
|
|
if (o.num_FAT > MAXNFT) { |
404 |
|
|
warnx("number of FATs (%u) is too large; maximum is %u", |
405 |
|
|
o.num_FAT, MAXNFT); |
406 |
|
|
return -1; |
407 |
|
|
} |
408 |
|
|
bpb.nft = o.num_FAT; |
409 |
|
|
} |
410 |
|
|
if (o.directory_entries) |
411 |
|
|
bpb.rde = o.directory_entries; |
412 |
|
|
if (o.media_descriptor_set) { |
413 |
|
|
if (o.media_descriptor < 0xf0) { |
414 |
|
|
warnx("illegal media descriptor (%#x)", o.media_descriptor); |
415 |
|
|
return -1; |
416 |
|
|
} |
417 |
|
|
bpb.mid = o.media_descriptor; |
418 |
|
|
} |
419 |
|
|
if (o.sectors_per_fat) |
420 |
|
|
bpb.bspf = o.sectors_per_fat; |
421 |
|
|
if (o.info_sector) |
422 |
|
|
bpb.infs = o.info_sector; |
423 |
|
|
if (o.backup_sector) |
424 |
|
|
bpb.bkbs = o.backup_sector; |
425 |
|
|
bss = 1; |
426 |
|
|
bname = NULL; |
427 |
|
|
fd1 = -1; |
428 |
|
|
if (o.bootstrap) { |
429 |
|
|
bname = o.bootstrap; |
430 |
|
|
if (!strchr(bname, '/')) { |
431 |
|
|
snprintf(buf, sizeof(buf), "/boot/%s", bname); |
432 |
|
|
if (!(bname = strdup(buf))) { |
433 |
|
|
warn(NULL); |
434 |
|
|
return -1; |
435 |
|
|
} |
436 |
|
|
} |
437 |
|
|
if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) { |
438 |
|
|
warn("%s", bname); |
439 |
|
|
return -1; |
440 |
|
|
} |
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 |
|
|
warnx("%s: inappropriate file type or format", bname); |
444 |
|
|
return -1; |
445 |
|
|
} |
446 |
|
|
bss = sb.st_size / bpb.bps; |
447 |
|
|
} |
448 |
|
|
if (!bpb.nft) |
449 |
|
|
bpb.nft = 2; |
450 |
|
|
if (!o.fat_type) { |
451 |
|
|
if (bpb.bsec < (bpb.res ? bpb.res : bss) + |
452 |
|
|
howmany((RESFTE + (bpb.spc ? MINCLS16 : MAXCLS12 + 1)) * |
453 |
|
|
((bpb.spc ? 16 : 12) / BPN), bpb.bps * NPB) * |
454 |
|
|
bpb.nft + |
455 |
|
|
howmany(bpb.rde ? bpb.rde : DEFRDE, |
456 |
|
|
bpb.bps / sizeof(struct de)) + |
457 |
|
|
(bpb.spc ? MINCLS16 : MAXCLS12 + 1) * |
458 |
|
|
(bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps))) |
459 |
|
|
o.fat_type = 12; |
460 |
|
|
else if (bpb.rde || bpb.bsec < |
461 |
|
|
(bpb.res ? bpb.res : bss) + |
462 |
|
|
howmany((RESFTE + MAXCLS16) * 2, bpb.bps) * bpb.nft + |
463 |
|
|
howmany(DEFRDE, bpb.bps / sizeof(struct de)) + |
464 |
|
|
(MAXCLS16 + 1) * |
465 |
|
|
(bpb.spc ? bpb.spc : howmany(8192, bpb.bps))) |
466 |
|
|
o.fat_type = 16; |
467 |
|
|
else |
468 |
|
|
o.fat_type = 32; |
469 |
|
|
} |
470 |
|
|
x = bss; |
471 |
|
|
if (o.fat_type == 32) { |
472 |
|
|
if (!bpb.infs) { |
473 |
|
|
if (x == MAXU16 || x == bpb.bkbs) { |
474 |
|
|
warnx("no room for info sector"); |
475 |
|
|
return -1; |
476 |
|
|
} |
477 |
|
|
bpb.infs = x; |
478 |
|
|
} |
479 |
|
|
if (bpb.infs != MAXU16 && x <= bpb.infs) |
480 |
|
|
x = bpb.infs + 1; |
481 |
|
|
if (!bpb.bkbs) { |
482 |
|
|
if (x == MAXU16) { |
483 |
|
|
warnx("no room for backup sector"); |
484 |
|
|
return -1; |
485 |
|
|
} |
486 |
|
|
bpb.bkbs = x; |
487 |
|
|
} else if (bpb.bkbs != MAXU16 && bpb.bkbs == bpb.infs) { |
488 |
|
|
warnx("backup sector would overwrite info sector"); |
489 |
|
|
return -1; |
490 |
|
|
} |
491 |
|
|
if (bpb.bkbs != MAXU16 && x <= bpb.bkbs) |
492 |
|
|
x = bpb.bkbs + 1; |
493 |
|
|
} |
494 |
|
|
if (!bpb.res) |
495 |
|
|
bpb.res = o.fat_type == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x; |
496 |
|
|
else if (bpb.res < x) { |
497 |
|
|
warnx("too few reserved sectors (need %d have %d)", x, bpb.res); |
498 |
|
|
return -1; |
499 |
|
|
} |
500 |
|
|
if (o.fat_type != 32 && !bpb.rde) |
501 |
|
|
bpb.rde = DEFRDE; |
502 |
|
|
rds = howmany(bpb.rde, bpb.bps / sizeof(struct de)); |
503 |
|
|
if (!bpb.spc) |
504 |
|
|
for (bpb.spc = howmany(o.fat_type == 16 ? DEFBLK16 : DEFBLK, bpb.bps); |
505 |
|
|
bpb.spc < MAXSPC && |
506 |
|
|
bpb.res + |
507 |
|
|
howmany((RESFTE + maxcls(o.fat_type)) * (o.fat_type / BPN), |
508 |
|
|
bpb.bps * NPB) * bpb.nft + |
509 |
|
|
rds + |
510 |
|
|
(u_int64_t)(maxcls(o.fat_type) + 1) * bpb.spc <= bpb.bsec; |
511 |
|
|
bpb.spc <<= 1); |
512 |
|
|
if (o.fat_type != 32 && bpb.bspf > MAXU16) { |
513 |
|
|
warnx("too many sectors/FAT for FAT12/16"); |
514 |
|
|
return -1; |
515 |
|
|
} |
516 |
|
|
x1 = bpb.res + rds; |
517 |
|
|
x = bpb.bspf ? bpb.bspf : 1; |
518 |
|
|
if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) { |
519 |
|
|
warnx("meta data exceeds file system size"); |
520 |
|
|
return -1; |
521 |
|
|
} |
522 |
|
|
x1 += x * bpb.nft; |
523 |
|
|
x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB / |
524 |
|
|
(bpb.spc * bpb.bps * NPB + o.fat_type / BPN * bpb.nft); |
525 |
|
|
x2 = howmany((RESFTE + MIN(x, maxcls(o.fat_type))) * (o.fat_type / BPN), |
526 |
|
|
bpb.bps * NPB); |
527 |
|
|
if (!bpb.bspf) { |
528 |
|
|
bpb.bspf = x2; |
529 |
|
|
x1 += (bpb.bspf - 1) * bpb.nft; |
530 |
|
|
} |
531 |
|
|
cls = (bpb.bsec - x1) / bpb.spc; |
532 |
|
|
x = (u_int64_t)bpb.bspf * bpb.bps * NPB / (o.fat_type / BPN) - RESFTE; |
533 |
|
|
if (cls > x) |
534 |
|
|
cls = x; |
535 |
|
|
if (bpb.bspf < x2) { |
536 |
|
|
warnx("warning: sectors/FAT limits file system to %u clusters", |
537 |
|
|
cls); |
538 |
|
|
return -1; |
539 |
|
|
} |
540 |
|
|
if (cls < mincls(o.fat_type)) { |
541 |
|
|
warnx("%u clusters too few clusters for FAT%u, need %u", cls, |
542 |
|
|
o.fat_type, mincls(o.fat_type)); |
543 |
|
|
return -1; |
544 |
|
|
} |
545 |
|
|
if (cls > maxcls(o.fat_type)) { |
546 |
|
|
cls = maxcls(o.fat_type); |
547 |
|
|
bpb.bsec = x1 + (cls + 1) * bpb.spc - 1; |
548 |
|
|
warnx("warning: FAT type limits file system to %u sectors", |
549 |
|
|
bpb.bsec); |
550 |
|
|
return -1; |
551 |
|
|
} |
552 |
|
|
printf("%s: %u sector%s in %u FAT%u cluster%s " |
553 |
|
|
"(%u bytes/cluster)\n", fname, cls * bpb.spc, |
554 |
|
|
cls * bpb.spc == 1 ? "" : "s", cls, o.fat_type, |
555 |
|
|
cls == 1 ? "" : "s", bpb.bps * bpb.spc); |
556 |
|
|
if (!bpb.mid) |
557 |
|
|
bpb.mid = !bpb.hid ? 0xf0 : 0xf8; |
558 |
|
|
if (o.fat_type == 32) |
559 |
|
|
bpb.rdcl = RESFTE; |
560 |
|
|
if (bpb.hid + bpb.bsec <= MAXU16) { |
561 |
|
|
bpb.sec = bpb.bsec; |
562 |
|
|
bpb.bsec = 0; |
563 |
|
|
} |
564 |
|
|
if (o.fat_type != 32) { |
565 |
|
|
bpb.spf = bpb.bspf; |
566 |
|
|
bpb.bspf = 0; |
567 |
|
|
} |
568 |
|
|
ch = 0; |
569 |
|
|
if (o.fat_type == 12) |
570 |
|
|
ch = 1; /* 001 Primary DOS with 12 bit FAT */ |
571 |
|
|
else if (o.fat_type == 16) { |
572 |
|
|
if (bpb.bsec == 0) |
573 |
|
|
ch = 4; /* 004 Primary DOS with 16 bit FAT <32M */ |
574 |
|
|
else |
575 |
|
|
ch = 6; /* 006 Primary 'big' DOS, 16-bit FAT (> 32MB) */ |
576 |
|
|
/* |
577 |
|
|
* XXX: what about: |
578 |
|
|
* 014 DOS (16-bit FAT) - LBA |
579 |
|
|
* ? |
580 |
|
|
*/ |
581 |
|
|
} else if (o.fat_type == 32) { |
582 |
|
|
ch = 11; /* 011 Primary DOS with 32 bit FAT */ |
583 |
|
|
/* |
584 |
|
|
* XXX: what about: |
585 |
|
|
* 012 Primary DOS with 32 bit FAT - LBA |
586 |
|
|
* ? |
587 |
|
|
*/ |
588 |
|
|
} |
589 |
|
|
if (ch != 0) |
590 |
|
|
printf("MBR type: %d\n", ch); |
591 |
|
|
print_bpb(&bpb); |
592 |
|
|
|
593 |
|
|
gettimeofday(&tv, NULL); |
594 |
|
|
now = tv.tv_sec; |
595 |
|
|
tm = localtime(&now); |
596 |
|
|
img = emalloc(bpb.bps); |
597 |
|
|
dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft; |
598 |
|
|
signal(SIGINFO, infohandler); |
599 |
|
|
for (lsn = 0; lsn < dir + (o.fat_type == 32 ? bpb.spc : rds); lsn++) { |
600 |
|
|
if (got_siginfo) { |
601 |
|
|
fprintf(stderr,"%s: writing sector %u of %u (%u%%)\n", |
602 |
|
|
fname,lsn,(dir + (o.fat_type == 32 ? bpb.spc : rds)), |
603 |
|
|
(lsn*100)/(dir + (o.fat_type == 32 ? bpb.spc : rds))); |
604 |
|
|
got_siginfo = 0; |
605 |
|
|
} |
606 |
|
|
x = lsn; |
607 |
|
|
if (o.bootstrap && |
608 |
|
|
o.fat_type == 32 && bpb.bkbs != MAXU16 && |
609 |
|
|
bss <= bpb.bkbs && x >= bpb.bkbs) { |
610 |
|
|
x -= bpb.bkbs; |
611 |
|
|
if (!x && lseek(fd1, o.offset, SEEK_SET)) { |
612 |
|
|
warn("%s", bname); |
613 |
|
|
return -1; |
614 |
|
|
} |
615 |
|
|
} |
616 |
|
|
if (o.bootstrap && x < bss) { |
617 |
|
|
if ((n = read(fd1, img, bpb.bps)) == -1) { |
618 |
|
|
warn("%s", bname); |
619 |
|
|
return -1; |
620 |
|
|
} |
621 |
|
|
if ((size_t)n != bpb.bps) { |
622 |
|
|
warnx("%s: can't read sector %u", bname, x); |
623 |
|
|
return -1; |
624 |
|
|
} |
625 |
|
|
} else |
626 |
|
|
memset(img, 0, bpb.bps); |
627 |
|
|
if (!lsn || |
628 |
|
|
(o.fat_type == 32 && bpb.bkbs != MAXU16 && lsn == bpb.bkbs)) { |
629 |
|
|
x1 = sizeof(struct bs); |
630 |
|
|
bsbpb = (struct bsbpb *)(img + x1); |
631 |
|
|
mk2(bsbpb->bps, bpb.bps); |
632 |
|
|
mk1(bsbpb->spc, bpb.spc); |
633 |
|
|
mk2(bsbpb->res, bpb.res); |
634 |
|
|
mk1(bsbpb->nft, bpb.nft); |
635 |
|
|
mk2(bsbpb->rde, bpb.rde); |
636 |
|
|
mk2(bsbpb->sec, bpb.sec); |
637 |
|
|
mk1(bsbpb->mid, bpb.mid); |
638 |
|
|
mk2(bsbpb->spf, bpb.spf); |
639 |
|
|
mk2(bsbpb->spt, bpb.spt); |
640 |
|
|
mk2(bsbpb->hds, bpb.hds); |
641 |
|
|
mk4(bsbpb->hid, bpb.hid); |
642 |
|
|
mk4(bsbpb->bsec, bpb.bsec); |
643 |
|
|
x1 += sizeof(struct bsbpb); |
644 |
|
|
if (o.fat_type == 32) { |
645 |
|
|
bsxbpb = (struct bsxbpb *)(img + x1); |
646 |
|
|
mk4(bsxbpb->bspf, bpb.bspf); |
647 |
|
|
mk2(bsxbpb->xflg, 0); |
648 |
|
|
mk2(bsxbpb->vers, 0); |
649 |
|
|
mk4(bsxbpb->rdcl, bpb.rdcl); |
650 |
|
|
mk2(bsxbpb->infs, bpb.infs); |
651 |
|
|
mk2(bsxbpb->bkbs, bpb.bkbs); |
652 |
|
|
x1 += sizeof(struct bsxbpb); |
653 |
|
|
} |
654 |
|
|
bsx = (struct bsx *)(img + x1); |
655 |
|
|
mk1(bsx->sig, 0x29); |
656 |
|
|
if (o.volume_id_set) |
657 |
|
|
x = o.volume_id; |
658 |
|
|
else |
659 |
|
|
x = (((u_int)(1 + tm->tm_mon) << 8 | |
660 |
|
|
(u_int)tm->tm_mday) + |
661 |
|
|
((u_int)tm->tm_sec << 8 | |
662 |
|
|
(u_int)(tv.tv_usec / 10))) << 16 | |
663 |
|
|
((u_int)(1900 + tm->tm_year) + |
664 |
|
|
((u_int)tm->tm_hour << 8 | |
665 |
|
|
(u_int)tm->tm_min)); |
666 |
|
|
mk4(bsx->volid, x); |
667 |
|
|
mklabel(bsx->label, o.volume_label ? o.volume_label : "NO NAME"); |
668 |
|
|
snprintf(buf, sizeof(buf), "FAT%u", o.fat_type); |
669 |
|
|
setstr(bsx->type, buf, sizeof(bsx->type)); |
670 |
|
|
if (!o.bootstrap) { |
671 |
|
|
x1 += sizeof(struct bsx); |
672 |
|
|
bs = (struct bs *)img; |
673 |
|
|
mk1(bs->jmp[0], 0xeb); |
674 |
|
|
mk1(bs->jmp[1], x1 - 2); |
675 |
|
|
mk1(bs->jmp[2], 0x90); |
676 |
|
|
setstr(bs->oem, o.OEM_string ? o.OEM_string : "NetBSD", |
677 |
|
|
sizeof(bs->oem)); |
678 |
|
|
memcpy(img + x1, bootcode, sizeof(bootcode)); |
679 |
|
|
mk2(img + MINBPS - 2, DOSMAGIC); |
680 |
|
|
} |
681 |
|
|
} else if (o.fat_type == 32 && bpb.infs != MAXU16 && |
682 |
|
|
(lsn == bpb.infs || |
683 |
|
|
(bpb.bkbs != MAXU16 && |
684 |
|
|
lsn == bpb.bkbs + bpb.infs))) { |
685 |
|
|
mk4(img, 0x41615252); |
686 |
|
|
mk4(img + MINBPS - 28, 0x61417272); |
687 |
|
|
mk4(img + MINBPS - 24, 0xffffffff); |
688 |
|
|
mk4(img + MINBPS - 20, 0xffffffff); |
689 |
|
|
mk2(img + MINBPS - 2, DOSMAGIC); |
690 |
|
|
} else if (lsn >= bpb.res && lsn < dir && |
691 |
|
|
!((lsn - bpb.res) % |
692 |
|
|
(bpb.spf ? bpb.spf : bpb.bspf))) { |
693 |
|
|
mk1(img[0], bpb.mid); |
694 |
|
|
for (x = 1; x < o.fat_type * (o.fat_type == 32 ? 3U : 2U) / 8U; x++) |
695 |
|
|
mk1(img[x], o.fat_type == 32 && x % 4 == 3 ? 0x0f : 0xff); |
696 |
|
|
} else if (lsn == dir && o.volume_label) { |
697 |
|
|
de = (struct de *)img; |
698 |
|
|
mklabel(de->namext, o.volume_label); |
699 |
|
|
mk1(de->attr, 050); |
700 |
|
|
x = (u_int)tm->tm_hour << 11 | |
701 |
|
|
(u_int)tm->tm_min << 5 | |
702 |
|
|
(u_int)tm->tm_sec >> 1; |
703 |
|
|
mk2(de->time, x); |
704 |
|
|
x = (u_int)(tm->tm_year - 80) << 9 | |
705 |
|
|
(u_int)(tm->tm_mon + 1) << 5 | |
706 |
|
|
(u_int)tm->tm_mday; |
707 |
|
|
mk2(de->date, x); |
708 |
|
|
} |
709 |
|
|
if ((n = write(fd, img, bpb.bps)) == -1) { |
710 |
|
|
warn("%s", fname); |
711 |
|
|
return -1; |
712 |
|
|
} |
713 |
|
|
if ((size_t)n != bpb.bps) { |
714 |
|
|
warnx("%s: can't write sector %u", fname, lsn); |
715 |
|
|
return -1; |
716 |
|
|
} |
717 |
|
|
} |
718 |
|
|
return 0; |
719 |
|
|
} |
720 |
|
|
|
721 |
|
|
|
722 |
|
|
/* |
723 |
|
|
* Get a standard format. |
724 |
|
|
*/ |
725 |
|
|
static int |
726 |
|
|
getstdfmt(const char *fmt, struct bpb *bpb) |
727 |
|
|
{ |
728 |
|
|
u_int x, i; |
729 |
|
|
|
730 |
|
|
x = sizeof(stdfmt) / sizeof(stdfmt[0]); |
731 |
|
|
for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++); |
732 |
|
|
if (i == x) { |
733 |
|
|
warnx("%s: unknown standard format", fmt); |
734 |
|
|
return -1; |
735 |
|
|
} |
736 |
|
|
*bpb = stdfmt[i].bpb; |
737 |
|
|
return 0; |
738 |
|
|
} |
739 |
|
|
|
740 |
|
|
/* |
741 |
|
|
* Get disk slice, partition, and geometry information. |
742 |
|
|
*/ |
743 |
|
|
static int |
744 |
|
|
getbpbinfo(int fd, const char *fname, const char *dtype, int iflag, |
745 |
|
|
struct bpb *bpb, int create) |
746 |
|
|
{ |
747 |
|
|
const char *s1, *s2; |
748 |
|
|
int part; |
749 |
|
|
|
750 |
|
|
part = -1; |
751 |
|
|
s1 = fname; |
752 |
|
|
if ((s2 = strrchr(s1, '/'))) |
753 |
|
|
s1 = s2 + 1; |
754 |
|
|
for (s2 = s1; *s2 && !isdigit((unsigned char)*s2); s2++); |
755 |
|
|
if (!*s2 || s2 == s1) |
756 |
|
|
s2 = NULL; |
757 |
|
|
else |
758 |
|
|
while (isdigit((unsigned char)*++s2)); |
759 |
|
|
s1 = s2; |
760 |
|
|
|
761 |
|
|
if (((part != -1) && ((!iflag && part != -1) || !bpb->bsec)) || |
762 |
|
|
!bpb->bps || !bpb->spt || !bpb->hds) { |
763 |
|
|
u_int sector_size; |
764 |
|
|
u_int nsectors; |
765 |
|
|
u_int ntracks; |
766 |
|
|
u_int size; |
767 |
|
|
{ |
768 |
|
|
struct stat st; |
769 |
|
|
|
770 |
|
|
if (fstat(fd, &st) == -1) { |
771 |
|
|
warnx("Can't get disk size for `%s'", fname); |
772 |
|
|
return -1; |
773 |
|
|
} |
774 |
|
|
/* create a fake geometry for a file image */ |
775 |
|
|
sector_size = 512; |
776 |
|
|
nsectors = 63; |
777 |
|
|
ntracks = 255; |
778 |
|
|
size = st.st_size / sector_size; |
779 |
|
|
} |
780 |
|
|
if (!bpb->bps) { |
781 |
|
|
if (ckgeom(fname, sector_size, "bytes/sector") == -1) |
782 |
|
|
return -1; |
783 |
|
|
bpb->bps = sector_size; |
784 |
|
|
} |
785 |
|
|
|
786 |
|
|
if (nsectors > 63) { |
787 |
|
|
/* |
788 |
|
|
* The kernel doesn't accept BPB with spt > 63. |
789 |
|
|
* (see sys/fs/msdosfs/msdosfs_vfsops.c:msdosfs_mountfs()) |
790 |
|
|
* If values taken from disklabel don't match these |
791 |
|
|
* restrictions, use popular BIOS default values instead. |
792 |
|
|
*/ |
793 |
|
|
nsectors = 63; |
794 |
|
|
} |
795 |
|
|
if (!bpb->spt) { |
796 |
|
|
if (ckgeom(fname, nsectors, "sectors/track") == -1) |
797 |
|
|
return -1; |
798 |
|
|
bpb->spt = nsectors; |
799 |
|
|
} |
800 |
|
|
if (!bpb->hds) { |
801 |
|
|
if (ckgeom(fname, ntracks, "drive heads") == -1) |
802 |
|
|
return -1; |
803 |
|
|
bpb->hds = ntracks; |
804 |
|
|
} |
805 |
|
|
if (!bpb->bsec) |
806 |
|
|
bpb->bsec = size; |
807 |
|
|
} |
808 |
|
|
return 0; |
809 |
|
|
} |
810 |
|
|
|
811 |
|
|
/* |
812 |
|
|
* Print out BPB values. |
813 |
|
|
*/ |
814 |
|
|
static void |
815 |
|
|
print_bpb(struct bpb *bpb) |
816 |
|
|
{ |
817 |
|
|
printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res, |
818 |
|
|
bpb->nft); |
819 |
|
|
if (bpb->rde) |
820 |
|
|
printf(" rde=%u", bpb->rde); |
821 |
|
|
if (bpb->sec) |
822 |
|
|
printf(" sec=%u", bpb->sec); |
823 |
|
|
printf(" mid=%#x", bpb->mid); |
824 |
|
|
if (bpb->spf) |
825 |
|
|
printf(" spf=%u", bpb->spf); |
826 |
|
|
printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid); |
827 |
|
|
if (bpb->bsec) |
828 |
|
|
printf(" bsec=%u", bpb->bsec); |
829 |
|
|
if (!bpb->spf) { |
830 |
|
|
printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl); |
831 |
|
|
printf(" infs="); |
832 |
|
|
printf(bpb->infs == MAXU16 ? "%#x" : "%u", bpb->infs); |
833 |
|
|
printf(" bkbs="); |
834 |
|
|
printf(bpb->bkbs == MAXU16 ? "%#x" : "%u", bpb->bkbs); |
835 |
|
|
} |
836 |
|
|
printf("\n"); |
837 |
|
|
} |
838 |
|
|
|
839 |
|
|
/* |
840 |
|
|
* Check a disk geometry value. |
841 |
|
|
*/ |
842 |
|
|
static int |
843 |
|
|
ckgeom(const char *fname, u_int val, const char *msg) |
844 |
|
|
{ |
845 |
|
|
if (!val) { |
846 |
|
|
warnx("%s: no default %s", fname, msg); |
847 |
|
|
return -1; |
848 |
|
|
} |
849 |
|
|
if (val > MAXU16) { |
850 |
|
|
warnx("%s: illegal %s", fname, msg); |
851 |
|
|
return -1; |
852 |
|
|
} |
853 |
|
|
return 0; |
854 |
|
|
} |
855 |
|
|
/* |
856 |
|
|
* Check a volume label. |
857 |
|
|
*/ |
858 |
|
|
static int |
859 |
|
|
oklabel(const char *src) |
860 |
|
|
{ |
861 |
|
|
int c, i; |
862 |
|
|
|
863 |
|
|
for (i = 0; i <= 11; i++) { |
864 |
|
|
c = (u_char)*src++; |
865 |
|
|
if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) |
866 |
|
|
break; |
867 |
|
|
} |
868 |
|
|
return i && !c; |
869 |
|
|
} |
870 |
|
|
|
871 |
|
|
/* |
872 |
|
|
* Make a volume label. |
873 |
|
|
*/ |
874 |
|
|
static void |
875 |
|
|
mklabel(u_int8_t *dest, const char *src) |
876 |
|
|
{ |
877 |
|
|
int c, i; |
878 |
|
|
|
879 |
|
|
for (i = 0; i < 11; i++) { |
880 |
|
|
c = *src ? toupper((unsigned char)*src++) : ' '; |
881 |
|
|
*dest++ = !i && c == '\xe5' ? 5 : c; |
882 |
|
|
} |
883 |
|
|
} |
884 |
|
|
|
885 |
|
|
/* |
886 |
|
|
* Copy string, padding with spaces. |
887 |
|
|
*/ |
888 |
|
|
static void |
889 |
|
|
setstr(u_int8_t *dest, const char *src, size_t len) |
890 |
|
|
{ |
891 |
|
|
while (len--) |
892 |
|
|
*dest++ = *src ? *src++ : ' '; |
893 |
|
|
} |
894 |
|
|
|
895 |
|
|
static void |
896 |
|
|
infohandler(int sig) |
897 |
|
|
{ |
898 |
|
|
got_siginfo = 1; |
899 |
|
|
} |