977 lines
26 KiB
C
977 lines
26 KiB
C
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/* $NetBSD: mkfs_msdos.c,v 1.8 2013/10/19 01:09:59 christos 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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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static const char rcsid[] =
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"$FreeBSD: src/sbin/newfs_msdos/newfs_msdos.c,v 1.15 2000/10/10 01:49:37 wollman Exp $";
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#else
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__RCSID("$NetBSD: mkfs_msdos.c,v 1.8 2013/10/19 01:09:59 christos Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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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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#ifndef MAKEFS
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#include <sys/mount.h>
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#include <sys/disk.h>
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#endif
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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 <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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#ifndef MAKEFS
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#include "partutil.h"
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#endif
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#include "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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#ifndef MAKEFS
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static int check_mounted(const char *, mode_t);
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#endif
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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;
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ssize_t n;
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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;
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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");
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return -1;
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}
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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);
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return -1;
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}
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if (o.create_size) {
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if (o.no_create) {
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warnx("create (-C) is incompatible with -N");
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return -1;
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}
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if (o.offset == 0)
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oflags |= O_TRUNC;
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fd = open(fname, oflags, 0644);
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if (fd == -1) {
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warnx("failed to create %s", fname);
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return -1;
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}
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(void)lseek(fd, o.create_size - 1, SEEK_SET);
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if (write(fd, "\0", 1) != 1) {
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warn("failed to set file size");
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return -1;
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}
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(void)lseek(fd, 0, SEEK_SET);
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} else if ((fd = open(fname, o.no_create ? O_RDONLY : O_RDWR)) == -1 ||
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fstat(fd, &sb)) {
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warn("%s", fname);
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return -1;
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}
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#ifndef MAKEFS
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if (!o.no_create)
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if (check_mounted(fname, sb.st_mode) == -1)
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return -1;
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#endif
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if (!S_ISCHR(sb.st_mode) && !o.create_size) {
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warnx("warning, %s is not a character device", fname);
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return -1;
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}
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if (o.offset && o.offset != lseek(fd, o.offset, SEEK_SET)) {
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warnx("cannot seek to %jd", (intmax_t)o.offset);
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return -1;
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|
}
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memset(&bpb, 0, sizeof(bpb));
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if (o.floppy) {
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if (getstdfmt(o.floppy, &bpb) == -1)
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return -1;
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bpb.bsec = bpb.sec;
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bpb.sec = 0;
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bpb.bspf = bpb.spf;
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bpb.spf = 0;
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}
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if (o.drive_heads)
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bpb.hds = o.drive_heads;
|
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|
if (o.sectors_per_track)
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bpb.spt = o.sectors_per_track;
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if (o.bytes_per_sector)
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bpb.bps = o.bytes_per_sector;
|
||
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if (o.size)
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bpb.bsec = o.size;
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if (o.hidden_sectors_set)
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bpb.hid = o.hidden_sectors;
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if (!(o.floppy || (o.drive_heads && o.sectors_per_track &&
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o.bytes_per_sector && o.size && o.hidden_sectors_set))) {
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if (getbpbinfo(fd, fname, dtype, o.hidden_sectors_set, &bpb,
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o.create_size != 0) == -1)
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return -1;
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|
bpb.bsec -= (o.offset / bpb.bps);
|
||
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if (bpb.spc == 0) { /* set defaults */
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||
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if (bpb.bsec <= 6000) /* about 3MB -> 512 bytes */
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bpb.spc = 1;
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else if (bpb.bsec <= (1<<17)) /* 64M -> 4k */
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bpb.spc = 8;
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else if (bpb.bsec <= (1<<19)) /* 256M -> 8k */
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||
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bpb.spc = 16;
|
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else if (bpb.bsec <= (1<<21)) /* 1G -> 16k */
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bpb.spc = 32;
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|
else
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bpb.spc = 64; /* otherwise 32k */
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (o.volume_label && !oklabel(o.volume_label)) {
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warnx("%s: bad volume label", o.volume_label);
|
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|
return -1;
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||
|
}
|
||
|
|
||
|
switch (o.fat_type) {
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||
|
case 0:
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||
|
if (o.floppy)
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o.fat_type = 12;
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||
|
else if (!o.directory_entries && (o.info_sector || o.backup_sector))
|
||
|
o.fat_type = 32;
|
||
|
break;
|
||
|
case 12:
|
||
|
case 16:
|
||
|
if (o.info_sector) {
|
||
|
warnx("Cannot specify info sector with FAT%u", o.fat_type);
|
||
|
return -1;
|
||
|
}
|
||
|
if (o.backup_sector) {
|
||
|
warnx("Cannot specify backup sector with FAT%u", o.fat_type);
|
||
|
return -1;
|
||
|
}
|
||
|
break;
|
||
|
case 32:
|
||
|
if (o.directory_entries) {
|
||
|
warnx("Cannot specify directory entries with FAT32");
|
||
|
return -1;
|
||
|
}
|
||
|
break;
|
||
|
default:
|
||
|
warnx("%d: bad FAT type", o.fat_type);
|
||
|
return -1;
|
||
|
}
|
||
|
if (!powerof2(bpb.bps)) {
|
||
|
warnx("bytes/sector (%u) is not a power of 2", bpb.bps);
|
||
|
return -1;
|
||
|
}
|
||
|
if (bpb.bps < MINBPS) {
|
||
|
warnx("bytes/sector (%u) is too small; minimum is %u",
|
||
|
bpb.bps, MINBPS);
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
if (o.floppy && o.fat_type == 32)
|
||
|
bpb.rde = 0;
|
||
|
if (o.block_size) {
|
||
|
if (!powerof2(o.block_size)) {
|
||
|
warnx("block size (%u) is not a power of 2", o.block_size);
|
||
|
return -1;
|
||
|
}
|
||
|
if (o.block_size < bpb.bps) {
|
||
|
warnx("block size (%u) is too small; minimum is %u",
|
||
|
o.block_size, bpb.bps);
|
||
|
return -1;
|
||
|
}
|
||
|
if (o.block_size > bpb.bps * MAXSPC) {
|
||
|
warnx("block size (%u) is too large; maximum is %u",
|
||
|
o.block_size, bpb.bps * MAXSPC);
|
||
|
return -1;
|
||
|
}
|
||
|
bpb.spc = o.block_size / bpb.bps;
|
||
|
}
|
||
|
if (o.sectors_per_cluster) {
|
||
|
if (!powerof2(o.sectors_per_cluster)) {
|
||
|
warnx("sectors/cluster (%u) is not a power of 2",
|
||
|
o.sectors_per_cluster);
|
||
|
return -1;
|
||
|
}
|
||
|
bpb.spc = o.sectors_per_cluster;
|
||
|
}
|
||
|
if (o.reserved_sectors)
|
||
|
bpb.res = o.reserved_sectors;
|
||
|
if (o.num_FAT) {
|
||
|
if (o.num_FAT > MAXNFT) {
|
||
|
warnx("number of FATs (%u) is too large; maximum is %u",
|
||
|
o.num_FAT, MAXNFT);
|
||
|
return -1;
|
||
|
}
|
||
|
bpb.nft = o.num_FAT;
|
||
|
}
|
||
|
if (o.directory_entries)
|
||
|
bpb.rde = o.directory_entries;
|
||
|
if (o.media_descriptor_set) {
|
||
|
if (o.media_descriptor < 0xf0) {
|
||
|
warnx("illegal media descriptor (%#x)", o.media_descriptor);
|
||
|
return -1;
|
||
|
}
|
||
|
bpb.mid = o.media_descriptor;
|
||
|
}
|
||
|
if (o.sectors_per_fat)
|
||
|
bpb.bspf = o.sectors_per_fat;
|
||
|
if (o.info_sector)
|
||
|
bpb.infs = o.info_sector;
|
||
|
if (o.backup_sector)
|
||
|
bpb.bkbs = o.backup_sector;
|
||
|
bss = 1;
|
||
|
bname = NULL;
|
||
|
fd1 = -1;
|
||
|
if (o.bootstrap) {
|
||
|
bname = o.bootstrap;
|
||
|
if (!strchr(bname, '/')) {
|
||
|
snprintf(buf, sizeof(buf), "/boot/%s", bname);
|
||
|
if (!(bname = strdup(buf))) {
|
||
|
warn(NULL);
|
||
|
return -1;
|
||
|
}
|
||
|
}
|
||
|
if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) {
|
||
|
warn("%s", bname);
|
||
|
return -1;
|
||
|
}
|
||
|
if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bps ||
|
||
|
sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU16) {
|
||
|
warnx("%s: inappropriate file type or format", bname);
|
||
|
return -1;
|
||
|
}
|
||
|
bss = sb.st_size / bpb.bps;
|
||
|
}
|
||
|
if (!bpb.nft)
|
||
|
bpb.nft = 2;
|
||
|
if (!o.fat_type) {
|
||
|
if (bpb.bsec < (bpb.res ? bpb.res : bss) +
|
||
|
howmany((RESFTE + (bpb.spc ? MINCLS16 : MAXCLS12 + 1)) *
|
||
|
((bpb.spc ? 16 : 12) / BPN), bpb.bps * NPB) *
|
||
|
bpb.nft +
|
||
|
howmany(bpb.rde ? bpb.rde : DEFRDE,
|
||
|
bpb.bps / sizeof(struct de)) +
|
||
|
(bpb.spc ? MINCLS16 : MAXCLS12 + 1) *
|
||
|
(bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps)))
|
||
|
o.fat_type = 12;
|
||
|
else if (bpb.rde || bpb.bsec <
|
||
|
(bpb.res ? bpb.res : bss) +
|
||
|
howmany((RESFTE + MAXCLS16) * 2, bpb.bps) * bpb.nft +
|
||
|
howmany(DEFRDE, bpb.bps / sizeof(struct de)) +
|
||
|
(MAXCLS16 + 1) *
|
||
|
(bpb.spc ? bpb.spc : howmany(8192, bpb.bps)))
|
||
|
o.fat_type = 16;
|
||
|
else
|
||
|
o.fat_type = 32;
|
||
|
}
|
||
|
x = bss;
|
||
|
if (o.fat_type == 32) {
|
||
|
if (!bpb.infs) {
|
||
|
if (x == MAXU16 || x == bpb.bkbs) {
|
||
|
warnx("no room for info sector");
|
||
|
return -1;
|
||
|
}
|
||
|
bpb.infs = x;
|
||
|
}
|
||
|
if (bpb.infs != MAXU16 && x <= bpb.infs)
|
||
|
x = bpb.infs + 1;
|
||
|
if (!bpb.bkbs) {
|
||
|
if (x == MAXU16) {
|
||
|
warnx("no room for backup sector");
|
||
|
return -1;
|
||
|
}
|
||
|
bpb.bkbs = x;
|
||
|
} else if (bpb.bkbs != MAXU16 && bpb.bkbs == bpb.infs) {
|
||
|
warnx("backup sector would overwrite info sector");
|
||
|
return -1;
|
||
|
}
|
||
|
if (bpb.bkbs != MAXU16 && x <= bpb.bkbs)
|
||
|
x = bpb.bkbs + 1;
|
||
|
}
|
||
|
if (!bpb.res)
|
||
|
bpb.res = o.fat_type == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x;
|
||
|
else if (bpb.res < x) {
|
||
|
warnx("too few reserved sectors (need %d have %d)", x, bpb.res);
|
||
|
return -1;
|
||
|
}
|
||
|
if (o.fat_type != 32 && !bpb.rde)
|
||
|
bpb.rde = DEFRDE;
|
||
|
rds = howmany(bpb.rde, bpb.bps / sizeof(struct de));
|
||
|
if (!bpb.spc)
|
||
|
for (bpb.spc = howmany(o.fat_type == 16 ? DEFBLK16 : DEFBLK, bpb.bps);
|
||
|
bpb.spc < MAXSPC &&
|
||
|
bpb.res +
|
||
|
howmany((RESFTE + maxcls(o.fat_type)) * (o.fat_type / BPN),
|
||
|
bpb.bps * NPB) * bpb.nft +
|
||
|
rds +
|
||
|
(u_int64_t)(maxcls(o.fat_type) + 1) * bpb.spc <= bpb.bsec;
|
||
|
bpb.spc <<= 1);
|
||
|
if (o.fat_type != 32 && bpb.bspf > MAXU16) {
|
||
|
warnx("too many sectors/FAT for FAT12/16");
|
||
|
return -1;
|
||
|
}
|
||
|
x1 = bpb.res + rds;
|
||
|
x = bpb.bspf ? bpb.bspf : 1;
|
||
|
if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) {
|
||
|
warnx("meta data exceeds file system size");
|
||
|
return -1;
|
||
|
}
|
||
|
x1 += x * bpb.nft;
|
||
|
x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB /
|
||
|
(bpb.spc * bpb.bps * NPB + o.fat_type / BPN * bpb.nft);
|
||
|
x2 = howmany((RESFTE + MIN(x, maxcls(o.fat_type))) * (o.fat_type / BPN),
|
||
|
bpb.bps * NPB);
|
||
|
if (!bpb.bspf) {
|
||
|
bpb.bspf = x2;
|
||
|
x1 += (bpb.bspf - 1) * bpb.nft;
|
||
|
}
|
||
|
cls = (bpb.bsec - x1) / bpb.spc;
|
||
|
x = (u_int64_t)bpb.bspf * bpb.bps * NPB / (o.fat_type / BPN) - RESFTE;
|
||
|
if (cls > x)
|
||
|
cls = x;
|
||
|
if (bpb.bspf < x2) {
|
||
|
warnx("warning: sectors/FAT limits file system to %u clusters",
|
||
|
cls);
|
||
|
return -1;
|
||
|
}
|
||
|
if (cls < mincls(o.fat_type)) {
|
||
|
warnx("%u clusters too few clusters for FAT%u, need %u", cls,
|
||
|
o.fat_type, mincls(o.fat_type));
|
||
|
return -1;
|
||
|
}
|
||
|
if (cls > maxcls(o.fat_type)) {
|
||
|
cls = maxcls(o.fat_type);
|
||
|
bpb.bsec = x1 + (cls + 1) * bpb.spc - 1;
|
||
|
warnx("warning: FAT type limits file system to %u sectors",
|
||
|
bpb.bsec);
|
||
|
return -1;
|
||
|
}
|
||
|
printf("%s: %u sector%s in %u FAT%u cluster%s "
|
||
|
"(%u bytes/cluster)\n", fname, cls * bpb.spc,
|
||
|
cls * bpb.spc == 1 ? "" : "s", cls, o.fat_type,
|
||
|
cls == 1 ? "" : "s", bpb.bps * bpb.spc);
|
||
|
if (!bpb.mid)
|
||
|
bpb.mid = !bpb.hid ? 0xf0 : 0xf8;
|
||
|
if (o.fat_type == 32)
|
||
|
bpb.rdcl = RESFTE;
|
||
|
if (bpb.hid + bpb.bsec <= MAXU16) {
|
||
|
bpb.sec = bpb.bsec;
|
||
|
bpb.bsec = 0;
|
||
|
}
|
||
|
if (o.fat_type != 32) {
|
||
|
bpb.spf = bpb.bspf;
|
||
|
bpb.bspf = 0;
|
||
|
}
|
||
|
ch = 0;
|
||
|
if (o.fat_type == 12)
|
||
|
ch = 1; /* 001 Primary DOS with 12 bit FAT */
|
||
|
else if (o.fat_type == 16) {
|
||
|
if (bpb.bsec == 0)
|
||
|
ch = 4; /* 004 Primary DOS with 16 bit FAT <32M */
|
||
|
else
|
||
|
ch = 6; /* 006 Primary 'big' DOS, 16-bit FAT (> 32MB) */
|
||
|
/*
|
||
|
* XXX: what about:
|
||
|
* 014 DOS (16-bit FAT) - LBA
|
||
|
* ?
|
||
|
*/
|
||
|
} else if (o.fat_type == 32) {
|
||
|
ch = 11; /* 011 Primary DOS with 32 bit FAT */
|
||
|
/*
|
||
|
* XXX: what about:
|
||
|
* 012 Primary DOS with 32 bit FAT - LBA
|
||
|
* ?
|
||
|
*/
|
||
|
}
|
||
|
if (ch != 0)
|
||
|
printf("MBR type: %d\n", ch);
|
||
|
print_bpb(&bpb);
|
||
|
if (!o.no_create) {
|
||
|
gettimeofday(&tv, NULL);
|
||
|
now = tv.tv_sec;
|
||
|
tm = localtime(&now);
|
||
|
if (!(img = malloc(bpb.bps)))
|
||
|
err(1, NULL);
|
||
|
dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft;
|
||
|
#ifdef SIGINFO
|
||
|
signal(SIGINFO, infohandler);
|
||
|
#endif
|
||
|
for (lsn = 0; lsn < dir + (o.fat_type == 32 ? bpb.spc : rds); lsn++) {
|
||
|
if (got_siginfo) {
|
||
|
fprintf(stderr,"%s: writing sector %u of %u (%u%%)\n",
|
||
|
fname,lsn,(dir + (o.fat_type == 32 ? bpb.spc : rds)),
|
||
|
(lsn*100)/(dir + (o.fat_type == 32 ? bpb.spc : rds)));
|
||
|
got_siginfo = 0;
|
||
|
}
|
||
|
x = lsn;
|
||
|
if (o.bootstrap &&
|
||
|
o.fat_type == 32 && bpb.bkbs != MAXU16 &&
|
||
|
bss <= bpb.bkbs && x >= bpb.bkbs) {
|
||
|
x -= bpb.bkbs;
|
||
|
if (!x && lseek(fd1, o.offset, SEEK_SET)) {
|
||
|
warn("%s", bname);
|
||
|
return -1;
|
||
|
}
|
||
|
}
|
||
|
if (o.bootstrap && x < bss) {
|
||
|
if ((n = read(fd1, img, bpb.bps)) == -1) {
|
||
|
warn("%s", bname);
|
||
|
return -1;
|
||
|
}
|
||
|
if ((size_t)n != bpb.bps) {
|
||
|
warnx("%s: can't read sector %u", bname, x);
|
||
|
return -1;
|
||
|
}
|
||
|
} else
|
||
|
memset(img, 0, bpb.bps);
|
||
|
if (!lsn ||
|
||
|
(o.fat_type == 32 && bpb.bkbs != MAXU16 && lsn == bpb.bkbs)) {
|
||
|
x1 = sizeof(struct bs);
|
||
|
bsbpb = (struct bsbpb *)(img + x1);
|
||
|
mk2(bsbpb->bps, bpb.bps);
|
||
|
mk1(bsbpb->spc, bpb.spc);
|
||
|
mk2(bsbpb->res, bpb.res);
|
||
|
mk1(bsbpb->nft, bpb.nft);
|
||
|
mk2(bsbpb->rde, bpb.rde);
|
||
|
mk2(bsbpb->sec, bpb.sec);
|
||
|
mk1(bsbpb->mid, bpb.mid);
|
||
|
mk2(bsbpb->spf, bpb.spf);
|
||
|
mk2(bsbpb->spt, bpb.spt);
|
||
|
mk2(bsbpb->hds, bpb.hds);
|
||
|
mk4(bsbpb->hid, bpb.hid);
|
||
|
mk4(bsbpb->bsec, bpb.bsec);
|
||
|
x1 += sizeof(struct bsbpb);
|
||
|
if (o.fat_type == 32) {
|
||
|
bsxbpb = (struct bsxbpb *)(img + x1);
|
||
|
mk4(bsxbpb->bspf, bpb.bspf);
|
||
|
mk2(bsxbpb->xflg, 0);
|
||
|
mk2(bsxbpb->vers, 0);
|
||
|
mk4(bsxbpb->rdcl, bpb.rdcl);
|
||
|
mk2(bsxbpb->infs, bpb.infs);
|
||
|
mk2(bsxbpb->bkbs, bpb.bkbs);
|
||
|
x1 += sizeof(struct bsxbpb);
|
||
|
}
|
||
|
bsx = (struct bsx *)(img + x1);
|
||
|
mk1(bsx->sig, 0x29);
|
||
|
if (o.volume_id_set)
|
||
|
x = o.volume_id;
|
||
|
else
|
||
|
x = (((u_int)(1 + tm->tm_mon) << 8 |
|
||
|
(u_int)tm->tm_mday) +
|
||
|
((u_int)tm->tm_sec << 8 |
|
||
|
(u_int)(tv.tv_usec / 10))) << 16 |
|
||
|
((u_int)(1900 + tm->tm_year) +
|
||
|
((u_int)tm->tm_hour << 8 |
|
||
|
(u_int)tm->tm_min));
|
||
|
mk4(bsx->volid, x);
|
||
|
mklabel(bsx->label, o.volume_label ? o.volume_label : "NO NAME");
|
||
|
snprintf(buf, sizeof(buf), "FAT%u", o.fat_type);
|
||
|
setstr(bsx->type, buf, sizeof(bsx->type));
|
||
|
if (!o.bootstrap) {
|
||
|
x1 += sizeof(struct bsx);
|
||
|
bs = (struct bs *)img;
|
||
|
mk1(bs->jmp[0], 0xeb);
|
||
|
mk1(bs->jmp[1], x1 - 2);
|
||
|
mk1(bs->jmp[2], 0x90);
|
||
|
setstr(bs->oem, o.OEM_string ? o.OEM_string : "NetBSD",
|
||
|
sizeof(bs->oem));
|
||
|
memcpy(img + x1, bootcode, sizeof(bootcode));
|
||
|
mk2(img + MINBPS - 2, DOSMAGIC);
|
||
|
}
|
||
|
} else if (o.fat_type == 32 && bpb.infs != MAXU16 &&
|
||
|
(lsn == bpb.infs ||
|
||
|
(bpb.bkbs != MAXU16 &&
|
||
|
lsn == bpb.bkbs + bpb.infs))) {
|
||
|
mk4(img, 0x41615252);
|
||
|
mk4(img + MINBPS - 28, 0x61417272);
|
||
|
mk4(img + MINBPS - 24, 0xffffffff);
|
||
|
mk4(img + MINBPS - 20, bpb.rdcl);
|
||
|
mk2(img + MINBPS - 2, DOSMAGIC);
|
||
|
} else if (lsn >= bpb.res && lsn < dir &&
|
||
|
!((lsn - bpb.res) %
|
||
|
(bpb.spf ? bpb.spf : bpb.bspf))) {
|
||
|
mk1(img[0], bpb.mid);
|
||
|
for (x = 1; x < o.fat_type * (o.fat_type == 32 ? 3U : 2U) / 8U; x++)
|
||
|
mk1(img[x], o.fat_type == 32 && x % 4 == 3 ? 0x0f : 0xff);
|
||
|
} else if (lsn == dir && o.volume_label) {
|
||
|
de = (struct de *)img;
|
||
|
mklabel(de->namext, o.volume_label);
|
||
|
mk1(de->attr, 050);
|
||
|
x = (u_int)tm->tm_hour << 11 |
|
||
|
(u_int)tm->tm_min << 5 |
|
||
|
(u_int)tm->tm_sec >> 1;
|
||
|
mk2(de->time, x);
|
||
|
x = (u_int)(tm->tm_year - 80) << 9 |
|
||
|
(u_int)(tm->tm_mon + 1) << 5 |
|
||
|
(u_int)tm->tm_mday;
|
||
|
mk2(de->date, x);
|
||
|
}
|
||
|
if ((n = write(fd, img, bpb.bps)) == -1) {
|
||
|
warn("%s", fname);
|
||
|
return -1;
|
||
|
}
|
||
|
if ((size_t)n != bpb.bps) {
|
||
|
warnx("%s: can't write sector %u", fname, lsn);
|
||
|
return -1;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
#ifndef MAKEFS
|
||
|
/*
|
||
|
* return -1 with error if file system is mounted.
|
||
|
*/
|
||
|
static int
|
||
|
check_mounted(const char *fname, mode_t mode)
|
||
|
{
|
||
|
struct statvfs *mp;
|
||
|
const char *s1, *s2;
|
||
|
size_t len;
|
||
|
int n, r;
|
||
|
|
||
|
if (!(n = getmntinfo(&mp, MNT_NOWAIT))) {
|
||
|
warn("getmntinfo");
|
||
|
return -1;
|
||
|
}
|
||
|
len = strlen(_PATH_DEV);
|
||
|
s1 = fname;
|
||
|
if (!strncmp(s1, _PATH_DEV, len))
|
||
|
s1 += len;
|
||
|
r = S_ISCHR(mode) && s1 != fname && *s1 == 'r';
|
||
|
for (; n--; mp++) {
|
||
|
s2 = mp->f_mntfromname;
|
||
|
if (!strncmp(s2, _PATH_DEV, len))
|
||
|
s2 += len;
|
||
|
if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) ||
|
||
|
!strcmp(s1, s2)) {
|
||
|
warnx("%s is mounted on %s", fname, mp->f_mntonname);
|
||
|
return -1;
|
||
|
}
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* Get a standard format.
|
||
|
*/
|
||
|
static int
|
||
|
getstdfmt(const char *fmt, struct bpb *bpb)
|
||
|
{
|
||
|
u_int x, i;
|
||
|
|
||
|
x = sizeof(stdfmt) / sizeof(stdfmt[0]);
|
||
|
for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++);
|
||
|
if (i == x) {
|
||
|
warnx("%s: unknown standard format", fmt);
|
||
|
return -1;
|
||
|
}
|
||
|
*bpb = stdfmt[i].bpb;
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Get disk slice, partition, and geometry information.
|
||
|
*/
|
||
|
static int
|
||
|
getbpbinfo(int fd, const char *fname, const char *dtype, int iflag,
|
||
|
struct bpb *bpb, int create)
|
||
|
{
|
||
|
const char *s1, *s2;
|
||
|
int part;
|
||
|
|
||
|
part = -1;
|
||
|
s1 = fname;
|
||
|
if ((s2 = strrchr(s1, '/')))
|
||
|
s1 = s2 + 1;
|
||
|
for (s2 = s1; *s2 && !isdigit((unsigned char)*s2); s2++);
|
||
|
if (!*s2 || s2 == s1)
|
||
|
s2 = NULL;
|
||
|
else
|
||
|
while (isdigit((unsigned char)*++s2));
|
||
|
s1 = s2;
|
||
|
|
||
|
#ifndef MAKEFS
|
||
|
int maxpartitions = getmaxpartitions();
|
||
|
|
||
|
// XXX: Does not work with wedges
|
||
|
if (s2 && *s2 >= 'a' && *s2 <= 'a' + maxpartitions - 1) {
|
||
|
part = *s2++ - 'a';
|
||
|
}
|
||
|
#endif
|
||
|
if (((part != -1) && ((!iflag && part != -1) || !bpb->bsec)) ||
|
||
|
!bpb->bps || !bpb->spt || !bpb->hds) {
|
||
|
u_int sector_size;
|
||
|
u_int nsectors;
|
||
|
u_int ntracks;
|
||
|
u_int size;
|
||
|
#ifndef MAKEFS
|
||
|
struct disk_geom geo;
|
||
|
struct dkwedge_info dkw;
|
||
|
|
||
|
if (!create && getdiskinfo(fname, fd, NULL, &geo, &dkw) != -1) {
|
||
|
sector_size = geo.dg_secsize = 512;
|
||
|
nsectors = geo.dg_nsectors = 63;
|
||
|
ntracks = geo.dg_ntracks = 255;
|
||
|
size = dkw.dkw_size;
|
||
|
} else
|
||
|
#endif
|
||
|
{
|
||
|
struct stat st;
|
||
|
|
||
|
if (fstat(fd, &st) == -1) {
|
||
|
warnx("Can't get disk size for `%s'", fname);
|
||
|
return -1;
|
||
|
}
|
||
|
/* create a fake geometry for a file image */
|
||
|
sector_size = 512;
|
||
|
nsectors = 63;
|
||
|
ntracks = 255;
|
||
|
size = st.st_size / sector_size;
|
||
|
}
|
||
|
if (!bpb->bps) {
|
||
|
if (ckgeom(fname, sector_size, "bytes/sector") == -1)
|
||
|
return -1;
|
||
|
bpb->bps = sector_size;
|
||
|
}
|
||
|
|
||
|
if (nsectors > 63) {
|
||
|
/*
|
||
|
* The kernel doesn't accept BPB with spt > 63.
|
||
|
* (see sys/fs/msdosfs/msdosfs_vfsops.c:msdosfs_mountfs())
|
||
|
* If values taken from disklabel don't match these
|
||
|
* restrictions, use popular BIOS default values instead.
|
||
|
*/
|
||
|
nsectors = 63;
|
||
|
}
|
||
|
if (!bpb->spt) {
|
||
|
if (ckgeom(fname, nsectors, "sectors/track") == -1)
|
||
|
return -1;
|
||
|
bpb->spt = nsectors;
|
||
|
}
|
||
|
if (!bpb->hds)
|
||
|
if (ckgeom(fname, ntracks, "drive heads") == -1)
|
||
|
return -1;
|
||
|
bpb->hds = ntracks;
|
||
|
if (!bpb->bsec)
|
||
|
bpb->bsec = size;
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Print out BPB values.
|
||
|
*/
|
||
|
static void
|
||
|
print_bpb(struct bpb *bpb)
|
||
|
{
|
||
|
printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res,
|
||
|
bpb->nft);
|
||
|
if (bpb->rde)
|
||
|
printf(" rde=%u", bpb->rde);
|
||
|
if (bpb->sec)
|
||
|
printf(" sec=%u", bpb->sec);
|
||
|
printf(" mid=%#x", bpb->mid);
|
||
|
if (bpb->spf)
|
||
|
printf(" spf=%u", bpb->spf);
|
||
|
printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid);
|
||
|
if (bpb->bsec)
|
||
|
printf(" bsec=%u", bpb->bsec);
|
||
|
if (!bpb->spf) {
|
||
|
printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl);
|
||
|
printf(" infs=");
|
||
|
printf(bpb->infs == MAXU16 ? "%#x" : "%u", bpb->infs);
|
||
|
printf(" bkbs=");
|
||
|
printf(bpb->bkbs == MAXU16 ? "%#x" : "%u", bpb->bkbs);
|
||
|
}
|
||
|
printf("\n");
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Check a disk geometry value.
|
||
|
*/
|
||
|
static int
|
||
|
ckgeom(const char *fname, u_int val, const char *msg)
|
||
|
{
|
||
|
if (!val) {
|
||
|
warnx("%s: no default %s", fname, msg);
|
||
|
return -1;
|
||
|
}
|
||
|
if (val > MAXU16) {
|
||
|
warnx("%s: illegal %s", fname, msg);
|
||
|
return -1;
|
||
|
}
|
||
|
return 0;
|
||
|
}
|
||
|
/*
|
||
|
* Check a volume label.
|
||
|
*/
|
||
|
static int
|
||
|
oklabel(const char *src)
|
||
|
{
|
||
|
int c, i;
|
||
|
|
||
|
for (i = 0; i <= 11; i++) {
|
||
|
c = (u_char)*src++;
|
||
|
if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c))
|
||
|
break;
|
||
|
}
|
||
|
return i && !c;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Make a volume label.
|
||
|
*/
|
||
|
static void
|
||
|
mklabel(u_int8_t *dest, const char *src)
|
||
|
{
|
||
|
int c, i;
|
||
|
|
||
|
for (i = 0; i < 11; i++) {
|
||
|
c = *src ? toupper((unsigned char)*src++) : ' ';
|
||
|
*dest++ = !i && c == '\xe5' ? 5 : c;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Copy string, padding with spaces.
|
||
|
*/
|
||
|
static void
|
||
|
setstr(u_int8_t *dest, const char *src, size_t len)
|
||
|
{
|
||
|
while (len--)
|
||
|
*dest++ = *src ? *src++ : ' ';
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
infohandler(int sig)
|
||
|
{
|
||
|
got_siginfo = 1;
|
||
|
}
|