1099 lines
36 KiB
C
1099 lines
36 KiB
C
/*
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* Copyright (c) 1998 Robert Nordier
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD: src/sbin/newfs_msdos/newfs_msdos.c,v 1.33 2009/04/11 14:56:29 ed Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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#ifndef ANDROID
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#include <sys/fdcio.h>
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#include <sys/disk.h>
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#include <sys/disklabel.h>
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#include <sys/mount.h>
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#else
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#include <stdarg.h>
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#include <linux/fs.h>
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#include <linux/hdreg.h>
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#endif
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <inttypes.h>
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#include <paths.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#define MAXU16 0xffff /* maximum unsigned 16-bit quantity */
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#define BPN 4 /* bits per nibble */
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#define NPB 2 /* nibbles per byte */
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#define DOSMAGIC 0xaa55 /* DOS magic number */
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#define MINBPS 512 /* minimum bytes per sector */
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#define MAXSPC 128 /* maximum sectors per cluster */
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#define MAXNFT 16 /* maximum number of FATs */
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#define DEFBLK 4096 /* default block size */
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#define DEFBLK16 2048 /* default block size FAT16 */
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#define DEFRDE 512 /* default root directory entries */
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#define RESFTE 2 /* reserved FAT entries */
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#define MINCLS12 1 /* minimum FAT12 clusters */
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#define MINCLS16 0x1000 /* minimum FAT16 clusters */
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#define MINCLS32 2 /* minimum FAT32 clusters */
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#define MAXCLS12 0xfed /* maximum FAT12 clusters */
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#define MAXCLS16 0xfff5 /* maximum FAT16 clusters */
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#define MAXCLS32 0xffffff5 /* maximum FAT32 clusters */
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#define mincls(fat) ((fat) == 12 ? MINCLS12 : \
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(fat) == 16 ? MINCLS16 : \
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MINCLS32)
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#define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \
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(fat) == 16 ? MAXCLS16 : \
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MAXCLS32)
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#define mk1(p, x) \
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(p) = (u_int8_t)(x)
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#define mk2(p, x) \
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(p)[0] = (u_int8_t)(x), \
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(p)[1] = (u_int8_t)((x) >> 010)
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#define mk4(p, x) \
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(p)[0] = (u_int8_t)(x), \
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(p)[1] = (u_int8_t)((x) >> 010), \
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(p)[2] = (u_int8_t)((x) >> 020), \
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(p)[3] = (u_int8_t)((x) >> 030)
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#define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg)
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#define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg)
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#define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg)
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#define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg)
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struct bs {
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u_int8_t jmp[3]; /* bootstrap entry point */
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u_int8_t oem[8]; /* OEM name and version */
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};
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struct bsbpb {
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u_int8_t bps[2]; /* bytes per sector */
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u_int8_t spc; /* sectors per cluster */
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u_int8_t res[2]; /* reserved sectors */
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u_int8_t nft; /* number of FATs */
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u_int8_t rde[2]; /* root directory entries */
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u_int8_t sec[2]; /* total sectors */
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u_int8_t mid; /* media descriptor */
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u_int8_t spf[2]; /* sectors per FAT */
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u_int8_t spt[2]; /* sectors per track */
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u_int8_t hds[2]; /* drive heads */
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u_int8_t hid[4]; /* hidden sectors */
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u_int8_t bsec[4]; /* big total sectors */
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};
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struct bsxbpb {
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u_int8_t bspf[4]; /* big sectors per FAT */
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u_int8_t xflg[2]; /* FAT control flags */
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u_int8_t vers[2]; /* file system version */
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u_int8_t rdcl[4]; /* root directory start cluster */
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u_int8_t infs[2]; /* file system info sector */
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u_int8_t bkbs[2]; /* backup boot sector */
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u_int8_t rsvd[12]; /* reserved */
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};
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struct bsx {
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u_int8_t drv; /* drive number */
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u_int8_t rsvd; /* reserved */
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u_int8_t sig; /* extended boot signature */
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u_int8_t volid[4]; /* volume ID number */
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u_int8_t label[11]; /* volume label */
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u_int8_t type[8]; /* file system type */
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};
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struct de {
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u_int8_t namext[11]; /* name and extension */
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u_int8_t attr; /* attributes */
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u_int8_t rsvd[10]; /* reserved */
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u_int8_t time[2]; /* creation time */
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u_int8_t date[2]; /* creation date */
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u_int8_t clus[2]; /* starting cluster */
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u_int8_t size[4]; /* size */
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};
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struct bpb {
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u_int bps; /* bytes per sector */
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u_int spc; /* sectors per cluster */
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u_int res; /* reserved sectors */
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u_int nft; /* number of FATs */
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u_int rde; /* root directory entries */
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u_int sec; /* total sectors */
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u_int mid; /* media descriptor */
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u_int spf; /* sectors per FAT */
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u_int spt; /* sectors per track */
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u_int hds; /* drive heads */
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u_int hid; /* hidden sectors */
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u_int bsec; /* big total sectors */
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u_int bspf; /* big sectors per FAT */
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u_int rdcl; /* root directory start cluster */
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u_int infs; /* file system info sector */
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u_int bkbs; /* backup boot sector */
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};
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#define BPBGAP 0, 0, 0, 0, 0, 0
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static struct {
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const char *name;
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struct bpb bpb;
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} const stdfmt[] = {
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{"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1, BPBGAP}},
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{"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1, BPBGAP}},
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{"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2, BPBGAP}},
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{"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2, BPBGAP}},
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{"640", {512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2, BPBGAP}},
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{"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2, BPBGAP}},
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{"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2, BPBGAP}},
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{"1232", {1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2, BPBGAP}},
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{"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2, BPBGAP}},
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{"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2, BPBGAP}}
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};
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static const u_int8_t bootcode[] = {
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0xfa, /* cli */
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0x31, 0xc0, /* xor ax,ax */
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0x8e, 0xd0, /* mov ss,ax */
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0xbc, 0x00, 0x7c, /* mov sp,7c00h */
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0xfb, /* sti */
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0x8e, 0xd8, /* mov ds,ax */
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0xe8, 0x00, 0x00, /* call $ + 3 */
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0x5e, /* pop si */
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0x83, 0xc6, 0x19, /* add si,+19h */
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0xbb, 0x07, 0x00, /* mov bx,0007h */
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0xfc, /* cld */
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0xac, /* lodsb */
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0x84, 0xc0, /* test al,al */
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0x74, 0x06, /* jz $ + 8 */
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0xb4, 0x0e, /* mov ah,0eh */
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0xcd, 0x10, /* int 10h */
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0xeb, 0xf5, /* jmp $ - 9 */
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0x30, 0xe4, /* xor ah,ah */
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0xcd, 0x16, /* int 16h */
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0xcd, 0x19, /* int 19h */
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0x0d, 0x0a,
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'N', 'o', 'n', '-', 's', 'y', 's', 't',
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'e', 'm', ' ', 'd', 'i', 's', 'k',
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0x0d, 0x0a,
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'P', 'r', 'e', 's', 's', ' ', 'a', 'n',
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'y', ' ', 'k', 'e', 'y', ' ', 't', 'o',
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' ', 'r', 'e', 'b', 'o', 'o', 't',
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0x0d, 0x0a,
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0
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};
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static void check_mounted(const char *, mode_t);
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static void getstdfmt(const char *, struct bpb *);
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static void getdiskinfo(int, const char *, const char *, int, struct bpb *);
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static void print_bpb(struct bpb *);
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static u_int ckgeom(const char *, u_int, const char *);
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static u_int argtou(const char *, u_int, u_int, const char *);
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static off_t argtooff(const char *, const char *);
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static int oklabel(const char *);
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static void mklabel(u_int8_t *, const char *);
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static void setstr(u_int8_t *, const char *, size_t);
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static void usage(void);
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/*
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* Construct a FAT12, FAT16, or FAT32 file system.
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*/
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int newfs_msdos_main(int argc, char *argv[])
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{
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static const char opts[] = "@:NAB:C:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:r:s:u:";
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const char *opt_B = NULL, *opt_L = NULL, *opt_O = NULL, *opt_f = NULL;
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u_int opt_F = 0, opt_I = 0, opt_S = 0, opt_a = 0, opt_b = 0, opt_c = 0;
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u_int opt_e = 0, opt_h = 0, opt_i = 0, opt_k = 0, opt_m = 0, opt_n = 0;
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u_int opt_o = 0, opt_r = 0, opt_s = 0, opt_u = 0;
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u_int opt_A = 0;
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int opt_N = 0;
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int Iflag = 0, mflag = 0, oflag = 0;
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char buf[MAXPATHLEN];
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struct stat sb;
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struct timeval tv;
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struct bpb bpb;
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struct tm *tm;
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struct bs *bs;
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struct bsbpb *bsbpb;
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struct bsxbpb *bsxbpb;
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struct bsx *bsx;
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struct de *de;
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u_int8_t *img;
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const char *fname, *dtype, *bname;
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ssize_t n;
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time_t now;
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u_int fat, bss, rds, cls, dir, lsn, x, x1, x2;
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u_int extra_res, alignment=0, set_res, set_spf, set_spc, tempx, attempts=0;
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int ch, fd, fd1;
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off_t opt_create = 0, opt_ofs = 0;
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while ((ch = getopt(argc, argv, opts)) != -1)
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switch (ch) {
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case '@':
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opt_ofs = argtooff(optarg, "offset");
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break;
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case 'N':
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opt_N = 1;
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break;
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case 'A':
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opt_A = 1;
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break;
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case 'B':
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opt_B = optarg;
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break;
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case 'C':
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opt_create = argtooff(optarg, "create size");
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break;
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case 'F':
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if (strcmp(optarg, "12") && strcmp(optarg, "16") && strcmp(optarg, "32"))
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errx(1, "%s: bad FAT type", optarg);
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opt_F = atoi(optarg);
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break;
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case 'I':
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opt_I = argto4(optarg, 0, "volume ID");
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Iflag = 1;
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break;
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case 'L':
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if (!oklabel(optarg))
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errx(1, "%s: bad volume label", optarg);
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opt_L = optarg;
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break;
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case 'O':
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if (strlen(optarg) > 8)
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errx(1, "%s: bad OEM string", optarg);
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opt_O = optarg;
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break;
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case 'S':
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opt_S = argto2(optarg, 1, "bytes/sector");
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break;
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case 'a':
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opt_a = argto4(optarg, 1, "sectors/FAT");
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break;
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case 'b':
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opt_b = argtox(optarg, 1, "block size");
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opt_c = 0;
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break;
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case 'c':
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opt_c = argto1(optarg, 1, "sectors/cluster");
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opt_b = 0;
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break;
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case 'e':
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opt_e = argto2(optarg, 1, "directory entries");
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break;
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case 'f':
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opt_f = optarg;
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break;
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case 'h':
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opt_h = argto2(optarg, 1, "drive heads");
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break;
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case 'i':
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opt_i = argto2(optarg, 1, "info sector");
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break;
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case 'k':
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opt_k = argto2(optarg, 1, "backup sector");
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break;
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case 'm':
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opt_m = argto1(optarg, 0, "media descriptor");
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mflag = 1;
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break;
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case 'n':
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opt_n = argto1(optarg, 1, "number of FATs");
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break;
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case 'o':
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opt_o = argto4(optarg, 0, "hidden sectors");
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oflag = 1;
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break;
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case 'r':
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opt_r = argto2(optarg, 1, "reserved sectors");
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break;
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case 's':
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opt_s = argto4(optarg, 1, "file system size");
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break;
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case 'u':
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opt_u = argto2(optarg, 1, "sectors/track");
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break;
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc < 1 || argc > 2)
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usage();
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fname = *argv++;
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if (!opt_create && !strchr(fname, '/')) {
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snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname);
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if (!(fname = strdup(buf)))
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err(1, "%s", buf);
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}
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dtype = *argv;
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if (opt_A) {
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if (opt_r)
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errx(1, "align (-A) is incompatible with -r");
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if (opt_N)
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errx(1, "align (-A) is incompatible with -N");
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}
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if (opt_create) {
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if (opt_N)
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errx(1, "create (-C) is incompatible with -N");
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fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644);
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if (fd == -1)
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errx(1, "failed to create %s", fname);
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if (ftruncate(fd, opt_create))
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errx(1, "failed to initialize %jd bytes", (intmax_t)opt_create);
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} else if ((fd = open(fname, opt_N ? O_RDONLY : O_RDWR)) == -1)
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err(1, "%s", fname);
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if (fstat(fd, &sb))
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err(1, "%s", fname);
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if (opt_create) {
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if (!S_ISREG(sb.st_mode))
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warnx("warning, %s is not a regular file", fname);
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} else {
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if (!S_ISCHR(sb.st_mode))
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warnx("warning, %s is not a character device", fname);
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}
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if (!opt_N)
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check_mounted(fname, sb.st_mode);
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if (opt_ofs && opt_ofs != lseek(fd, opt_ofs, SEEK_SET))
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errx(1, "cannot seek to %jd", (intmax_t)opt_ofs);
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memset(&bpb, 0, sizeof(bpb));
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if (opt_f) {
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getstdfmt(opt_f, &bpb);
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bpb.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 (opt_h)
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bpb.hds = opt_h;
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if (opt_u)
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bpb.spt = opt_u;
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if (opt_S)
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bpb.bps = opt_S;
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if (opt_s)
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bpb.bsec = opt_s;
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if (oflag)
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bpb.hid = opt_o;
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if (!(opt_f || (opt_h && opt_u && opt_S && opt_s && oflag))) {
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off_t delta;
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getdiskinfo(fd, fname, dtype, oflag, &bpb);
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if (opt_s) {
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bpb.bsec = opt_s;
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}
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bpb.bsec -= (opt_ofs / bpb.bps);
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delta = bpb.bsec % bpb.spt;
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if (delta != 0) {
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warnx("trim %d sectors from %d to adjust to a multiple of %d",
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(int)delta, bpb.bsec, bpb.spt);
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bpb.bsec -= delta;
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}
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if (bpb.spc == 0) { /* set defaults */
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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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bpb.spc = 16;
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else if (bpb.bsec <= (1<<22)) /* 2G -> 16k, some versions of windows
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require a minimum of 65527 clusters */
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bpb.spc = 32;
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else
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|
bpb.spc = 64; /* otherwise 32k */
|
|
}
|
|
}
|
|
if (!powerof2(bpb.bps))
|
|
errx(1, "bytes/sector (%u) is not a power of 2", bpb.bps);
|
|
if (bpb.bps < MINBPS)
|
|
errx(1, "bytes/sector (%u) is too small; minimum is %u",
|
|
bpb.bps, MINBPS);
|
|
if (!(fat = opt_F)) {
|
|
if (opt_f)
|
|
fat = 12;
|
|
else if (!opt_e && (opt_i || opt_k))
|
|
fat = 32;
|
|
}
|
|
if ((fat == 32 && opt_e) || (fat != 32 && (opt_i || opt_k)))
|
|
errx(1, "-%c is not a legal FAT%s option",
|
|
fat == 32 ? 'e' : opt_i ? 'i' : 'k',
|
|
fat == 32 ? "32" : "12/16");
|
|
if (opt_f && fat == 32)
|
|
bpb.rde = 0;
|
|
if (opt_b) {
|
|
if (!powerof2(opt_b))
|
|
errx(1, "block size (%u) is not a power of 2", opt_b);
|
|
if (opt_b < bpb.bps)
|
|
errx(1, "block size (%u) is too small; minimum is %u",
|
|
opt_b, bpb.bps);
|
|
if (opt_b > bpb.bps * MAXSPC)
|
|
errx(1, "block size (%u) is too large; maximum is %u", opt_b, bpb.bps * MAXSPC);
|
|
bpb.spc = opt_b / bpb.bps;
|
|
}
|
|
if (opt_c) {
|
|
if (!powerof2(opt_c))
|
|
errx(1, "sectors/cluster (%u) is not a power of 2", opt_c);
|
|
bpb.spc = opt_c;
|
|
}
|
|
if (opt_r)
|
|
bpb.res = opt_r;
|
|
if (opt_n) {
|
|
if (opt_n > MAXNFT)
|
|
errx(1, "number of FATs (%u) is too large; maximum is %u", opt_n, MAXNFT);
|
|
bpb.nft = opt_n;
|
|
}
|
|
if (opt_e)
|
|
bpb.rde = opt_e;
|
|
if (mflag) {
|
|
if (opt_m < 0xf0)
|
|
errx(1, "illegal media descriptor (%#x)", opt_m);
|
|
bpb.mid = opt_m;
|
|
}
|
|
if (opt_a)
|
|
bpb.bspf = opt_a;
|
|
if (opt_i)
|
|
bpb.infs = opt_i;
|
|
if (opt_k)
|
|
bpb.bkbs = opt_k;
|
|
bss = 1;
|
|
bname = NULL;
|
|
fd1 = -1;
|
|
if (opt_B) {
|
|
bname = opt_B;
|
|
if (!strchr(bname, '/')) {
|
|
snprintf(buf, sizeof(buf), "/boot/%s", bname);
|
|
if (!(bname = strdup(buf)))
|
|
err(1, "%s", buf);
|
|
}
|
|
if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb))
|
|
err(1, "%s", bname);
|
|
if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bps ||
|
|
sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU16)
|
|
errx(1, "%s: inappropriate file type or format", bname);
|
|
bss = sb.st_size / bpb.bps;
|
|
}
|
|
if (!bpb.nft)
|
|
bpb.nft = 2;
|
|
if (!fat) {
|
|
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)))
|
|
fat = 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)))
|
|
fat = 16;
|
|
else
|
|
fat = 32;
|
|
}
|
|
x = bss;
|
|
if (fat == 32) {
|
|
if (!bpb.infs) {
|
|
if (x == MAXU16 || x == bpb.bkbs)
|
|
errx(1, "no room for info sector");
|
|
bpb.infs = x;
|
|
}
|
|
if (bpb.infs != MAXU16 && x <= bpb.infs)
|
|
x = bpb.infs + 1;
|
|
if (!bpb.bkbs) {
|
|
if (x == MAXU16)
|
|
errx(1, "no room for backup sector");
|
|
bpb.bkbs = x;
|
|
} else if (bpb.bkbs != MAXU16 && bpb.bkbs == bpb.infs)
|
|
errx(1, "backup sector would overwrite info sector");
|
|
if (bpb.bkbs != MAXU16 && x <= bpb.bkbs)
|
|
x = bpb.bkbs + 1;
|
|
}
|
|
|
|
extra_res = 0;
|
|
set_res = !bpb.res;
|
|
set_spf = !bpb.bspf;
|
|
set_spc = !bpb.spc;
|
|
tempx = x;
|
|
/*
|
|
* Attempt to align if opt_A is set. This is done by increasing the number
|
|
* of reserved blocks. This can cause other factors to change, which can in
|
|
* turn change the alignment. This should take at most 2 iterations, as
|
|
* increasing the reserved amount may cause the FAT size to decrease by 1,
|
|
* requiring another nft reserved blocks. If spc changes, it will
|
|
* be half of its previous size, and thus will not throw off alignment.
|
|
*/
|
|
do {
|
|
x = tempx;
|
|
if (set_res)
|
|
bpb.res = (fat == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x) + extra_res;
|
|
else if (bpb.res < x)
|
|
errx(1, "too few reserved sectors");
|
|
if (fat != 32 && !bpb.rde)
|
|
bpb.rde = DEFRDE;
|
|
rds = howmany(bpb.rde, bpb.bps / sizeof(struct de));
|
|
if (set_spc)
|
|
for (bpb.spc = howmany(fat == 16 ? DEFBLK16 : DEFBLK, bpb.bps);
|
|
bpb.spc < MAXSPC &&
|
|
bpb.res +
|
|
howmany((RESFTE + maxcls(fat)) * (fat / BPN),
|
|
bpb.bps * NPB) * bpb.nft +
|
|
rds +
|
|
(u_int64_t)(maxcls(fat) + 1) * bpb.spc <= bpb.bsec;
|
|
bpb.spc <<= 1);
|
|
if (fat != 32 && bpb.bspf > MAXU16)
|
|
errx(1, "too many sectors/FAT for FAT12/16");
|
|
x1 = bpb.res + rds;
|
|
x = bpb.bspf ? bpb.bspf : 1;
|
|
if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec)
|
|
errx(1, "meta data exceeds file system size");
|
|
x1 += x * bpb.nft;
|
|
x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB /
|
|
(bpb.spc * bpb.bps * NPB + fat / BPN * bpb.nft);
|
|
x2 = howmany((RESFTE + MIN(x, maxcls(fat))) * (fat / BPN), bpb.bps * NPB);
|
|
if (set_spf) {
|
|
if (!bpb.bspf) {
|
|
bpb.bspf = x2;
|
|
}
|
|
x1 += (bpb.bspf - 1) * bpb.nft;
|
|
}
|
|
if(set_res) {
|
|
/* attempt to align root directory */
|
|
alignment = (bpb.res + bpb.bspf * bpb.nft) % bpb.spc;
|
|
extra_res += bpb.spc - alignment;
|
|
}
|
|
attempts++;
|
|
} while(opt_A && alignment != 0 && attempts < 2);
|
|
if (alignment != 0)
|
|
warnx("warning: Alignment failed.");
|
|
|
|
cls = (bpb.bsec - x1) / bpb.spc;
|
|
x = (u_int64_t)bpb.bspf * bpb.bps * NPB / (fat / BPN) - RESFTE;
|
|
if (cls > x)
|
|
cls = x;
|
|
if (bpb.bspf < x2)
|
|
warnx("warning: sectors/FAT limits file system to %u clusters", cls);
|
|
if (cls < mincls(fat))
|
|
errx(1, "%u clusters too few clusters for FAT%u, need %u", cls, fat, mincls(fat));
|
|
if (cls > maxcls(fat)) {
|
|
cls = maxcls(fat);
|
|
bpb.bsec = x1 + (cls + 1) * bpb.spc - 1;
|
|
warnx("warning: FAT type limits file system to %u sectors", bpb.bsec);
|
|
}
|
|
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, fat,
|
|
cls == 1 ? "" : "s", bpb.bps * bpb.spc);
|
|
if (!bpb.mid)
|
|
bpb.mid = !bpb.hid ? 0xf0 : 0xf8;
|
|
if (fat == 32)
|
|
bpb.rdcl = RESFTE;
|
|
if (bpb.hid + bpb.bsec <= MAXU16) {
|
|
bpb.sec = bpb.bsec;
|
|
bpb.bsec = 0;
|
|
}
|
|
if (fat != 32) {
|
|
bpb.spf = bpb.bspf;
|
|
bpb.bspf = 0;
|
|
}
|
|
print_bpb(&bpb);
|
|
if (!opt_N) {
|
|
gettimeofday(&tv, NULL);
|
|
now = tv.tv_sec;
|
|
tm = localtime(&now);
|
|
if (!(img = malloc(bpb.bps)))
|
|
err(1, "%u", bpb.bps);
|
|
dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft;
|
|
for (lsn = 0; lsn < dir + (fat == 32 ? bpb.spc : rds); lsn++) {
|
|
x = lsn;
|
|
if (opt_B && fat == 32 && bpb.bkbs != MAXU16 && bss <= bpb.bkbs && x >= bpb.bkbs) {
|
|
x -= bpb.bkbs;
|
|
if (!x && lseek(fd1, opt_ofs, SEEK_SET))
|
|
err(1, "%s", bname);
|
|
}
|
|
if (opt_B && x < bss) {
|
|
if ((n = read(fd1, img, bpb.bps)) == -1)
|
|
err(1, "%s", bname);
|
|
if ((unsigned)n != bpb.bps)
|
|
errx(1, "%s: can't read sector %u", bname, x);
|
|
} else
|
|
memset(img, 0, bpb.bps);
|
|
if (!lsn || (fat == 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 (fat == 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 (Iflag)
|
|
x = opt_I;
|
|
else
|
|
x = (((u_int)(1 + tm->tm_mon) << 8 |
|
|
(u_int)tm->tm_mday) +
|
|
((u_int)tm->tm_sec << 8 |
|
|
(u_int)(tv.tv_usec / 10))) << 16 |
|
|
((u_int)(1900 + tm->tm_year) +
|
|
((u_int)tm->tm_hour << 8 |
|
|
(u_int)tm->tm_min));
|
|
mk4(bsx->volid, x);
|
|
mklabel(bsx->label, opt_L ? opt_L : "NO NAME");
|
|
snprintf(buf, sizeof(buf), "FAT%u", fat);
|
|
setstr(bsx->type, buf, sizeof(bsx->type));
|
|
if (!opt_B) {
|
|
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, opt_O ? opt_O : "BSD 4.4",
|
|
sizeof(bs->oem));
|
|
memcpy(img + x1, bootcode, sizeof(bootcode));
|
|
mk2(img + MINBPS - 2, DOSMAGIC);
|
|
}
|
|
} else if (fat == 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 < fat * (fat == 32 ? 3 : 2) / 8; x++)
|
|
mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff);
|
|
} else if (lsn == dir && opt_L) {
|
|
de = (struct de *)img;
|
|
mklabel(de->namext, opt_L);
|
|
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)
|
|
err(1, "%s", fname);
|
|
if ((unsigned)n != bpb.bps) {
|
|
errx(1, "%s: can't write sector %u", fname, lsn);
|
|
exit(1);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Exit with error if file system is mounted.
|
|
*/
|
|
static void check_mounted(const char *fname, mode_t mode)
|
|
{
|
|
#ifdef ANDROID
|
|
warnx("Skipping mount checks");
|
|
#else
|
|
struct statfs *mp;
|
|
const char *s1, *s2;
|
|
size_t len;
|
|
int n, r;
|
|
|
|
if (!(n = getmntinfo(&mp, MNT_NOWAIT)))
|
|
err(1, "getmntinfo");
|
|
len = strlen(_PATH_DEV);
|
|
s1 = fname;
|
|
if (!strncmp(s1, _PATH_DEV, len))
|
|
s1 += len;
|
|
r = S_ISCHR(mode) && s1 != fname && *s1 == 'r';
|
|
for (; n--; mp++) {
|
|
s2 = mp->f_mntfromname;
|
|
if (!strncmp(s2, _PATH_DEV, len))
|
|
s2 += len;
|
|
if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) || !strcmp(s1, s2))
|
|
errx(1, "%s is mounted on %s", fname, mp->f_mntonname);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Get a standard format.
|
|
*/
|
|
static void getstdfmt(const char *fmt, struct bpb *bpb)
|
|
{
|
|
u_int x, i;
|
|
|
|
x = sizeof(stdfmt) / sizeof(stdfmt[0]);
|
|
for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++);
|
|
if (i == x)
|
|
errx(1, "%s: unknown standard format", fmt);
|
|
*bpb = stdfmt[i].bpb;
|
|
}
|
|
|
|
/*
|
|
* Get disk slice, partition, and geometry information.
|
|
*/
|
|
|
|
#ifdef ANDROID
|
|
static void getdiskinfo(int fd, const char *fname, const char *dtype,
|
|
__unused int oflag,struct bpb *bpb)
|
|
{
|
|
struct hd_geometry geom;
|
|
u_long block_size;
|
|
|
|
if (ioctl(fd, BLKSSZGET, &bpb->bps)) {
|
|
fprintf(stderr, "Error getting bytes / sector (%s)\n", strerror(errno));
|
|
exit(1);
|
|
}
|
|
|
|
ckgeom(fname, bpb->bps, "bytes/sector");
|
|
|
|
if (ioctl(fd, BLKGETSIZE, &block_size)) {
|
|
fprintf(stderr, "Error getting blocksize (%s)\n", strerror(errno));
|
|
exit(1);
|
|
}
|
|
|
|
if (block_size > UINT32_MAX) {
|
|
fprintf(stderr, "Error blocksize too large: %lu\n", block_size);
|
|
exit(1);
|
|
}
|
|
|
|
bpb->bsec = (u_int)block_size;
|
|
|
|
if (ioctl(fd, HDIO_GETGEO, &geom)) {
|
|
fprintf(stderr, "Error getting gemoetry (%s) - trying sane values\n", strerror(errno));
|
|
geom.heads = 64;
|
|
geom.sectors = 63;
|
|
}
|
|
|
|
if (!geom.heads) {
|
|
printf("Bogus heads from kernel - setting sane value\n");
|
|
geom.heads = 64;
|
|
}
|
|
|
|
if (!geom.sectors) {
|
|
printf("Bogus sectors from kernel - setting sane value\n");
|
|
geom.sectors = 63;
|
|
}
|
|
|
|
bpb->spt = geom.sectors;
|
|
ckgeom(fname, bpb->spt, "sectors/track");
|
|
|
|
bpb->hds = geom.heads;
|
|
ckgeom(fname, bpb->hds, "drive heads");
|
|
}
|
|
|
|
#else
|
|
|
|
static void getdiskinfo(int fd, const char *fname, const char *dtype,
|
|
__unused int oflag, struct bpb *bpb)
|
|
{
|
|
struct disklabel *lp, dlp;
|
|
struct fd_type type;
|
|
off_t ms, hs = 0;
|
|
|
|
lp = NULL;
|
|
|
|
/* If the user specified a disk type, try to use that */
|
|
if (dtype != NULL) {
|
|
lp = getdiskbyname(dtype);
|
|
}
|
|
|
|
/* Maybe it's a floppy drive */
|
|
if (lp == NULL) {
|
|
if (ioctl(fd, DIOCGMEDIASIZE, &ms) == -1) {
|
|
struct stat st;
|
|
|
|
if (fstat(fd, &st))
|
|
err(1, "Cannot get disk size");
|
|
/* create a fake geometry for a file image */
|
|
ms = st.st_size;
|
|
dlp.d_secsize = 512;
|
|
dlp.d_nsectors = 63;
|
|
dlp.d_ntracks = 255;
|
|
dlp.d_secperunit = ms / dlp.d_secsize;
|
|
lp = &dlp;
|
|
} else if (ioctl(fd, FD_GTYPE, &type) != -1) {
|
|
dlp.d_secsize = 128 << type.secsize;
|
|
dlp.d_nsectors = type.sectrac;
|
|
dlp.d_ntracks = type.heads;
|
|
dlp.d_secperunit = ms / dlp.d_secsize;
|
|
lp = &dlp;
|
|
}
|
|
}
|
|
|
|
/* Maybe it's a fixed drive */
|
|
if (lp == NULL) {
|
|
if (ioctl(fd, DIOCGDINFO, &dlp) == -1) {
|
|
if (bpb->bps == 0 && ioctl(fd, DIOCGSECTORSIZE, &dlp.d_secsize) == -1)
|
|
errx(1, "Cannot get sector size, %s", strerror(errno));
|
|
|
|
/* XXX Should we use bpb->bps if it's set? */
|
|
dlp.d_secperunit = ms / dlp.d_secsize;
|
|
|
|
if (bpb->spt == 0 && ioctl(fd, DIOCGFWSECTORS, &dlp.d_nsectors) == -1) {
|
|
warnx("Cannot get number of sectors per track, %s", strerror(errno));
|
|
dlp.d_nsectors = 63;
|
|
}
|
|
if (bpb->hds == 0 && ioctl(fd, DIOCGFWHEADS, &dlp.d_ntracks) == -1) {
|
|
warnx("Cannot get number of heads, %s", strerror(errno));
|
|
if (dlp.d_secperunit <= 63*1*1024)
|
|
dlp.d_ntracks = 1;
|
|
else if (dlp.d_secperunit <= 63*16*1024)
|
|
dlp.d_ntracks = 16;
|
|
else
|
|
dlp.d_ntracks = 255;
|
|
}
|
|
}
|
|
|
|
hs = (ms / dlp.d_secsize) - dlp.d_secperunit;
|
|
lp = &dlp;
|
|
}
|
|
|
|
if (bpb->bps == 0)
|
|
bpb->bps = ckgeom(fname, lp->d_secsize, "bytes/sector");
|
|
if (bpb->spt == 0)
|
|
bpb->spt = ckgeom(fname, lp->d_nsectors, "sectors/track");
|
|
if (bpb->hds == 0)
|
|
bpb->hds = ckgeom(fname, lp->d_ntracks, "drive heads");
|
|
if (bpb->bsec == 0)
|
|
bpb->bsec = lp->d_secperunit;
|
|
if (bpb->hid == 0)
|
|
bpb->hid = hs;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* 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 u_int ckgeom(const char *fname, u_int val, const char *msg)
|
|
{
|
|
if (!val)
|
|
errx(1, "%s: no default %s", fname, msg);
|
|
if (val > MAXU16)
|
|
errx(1, "%s: illegal %s %d", fname, msg, val);
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* Convert and check a numeric option argument.
|
|
*/
|
|
static u_int argtou(const char *arg, u_int lo, u_int hi, const char *msg)
|
|
{
|
|
char *s;
|
|
u_long x;
|
|
|
|
errno = 0;
|
|
x = strtoul(arg, &s, 0);
|
|
if (errno || !*arg || *s || x < lo || x > hi)
|
|
errx(1, "%s: bad %s", arg, msg);
|
|
return x;
|
|
}
|
|
|
|
/*
|
|
* Same for off_t, with optional skmgpP suffix
|
|
*/
|
|
static off_t argtooff(const char *arg, const char *msg)
|
|
{
|
|
char *s;
|
|
off_t x;
|
|
|
|
x = strtoll(arg, &s, 0);
|
|
/* allow at most one extra char */
|
|
if (errno || x < 0 || (s[0] && s[1]) )
|
|
errx(1, "%s: bad %s", arg, msg);
|
|
if (*s) { /* the extra char is the multiplier */
|
|
switch (*s) {
|
|
default:
|
|
errx(1, "%s: bad %s", arg, msg);
|
|
/* notreached */
|
|
|
|
case 's': /* sector */
|
|
case 'S':
|
|
x <<= 9; /* times 512 */
|
|
break;
|
|
|
|
case 'k': /* kilobyte */
|
|
case 'K':
|
|
x <<= 10; /* times 1024 */
|
|
break;
|
|
|
|
case 'm': /* megabyte */
|
|
case 'M':
|
|
x <<= 20; /* times 1024*1024 */
|
|
break;
|
|
|
|
case 'g': /* gigabyte */
|
|
case 'G':
|
|
x <<= 30; /* times 1024*1024*1024 */
|
|
break;
|
|
|
|
case 'p': /* partition start */
|
|
case 'P': /* partition start */
|
|
case 'l': /* partition length */
|
|
case 'L': /* partition length */
|
|
errx(1, "%s: not supported yet %s", arg, msg);
|
|
/* notreached */
|
|
}
|
|
}
|
|
return x;
|
|
}
|
|
|
|
/*
|
|
* Check a volume label.
|
|
*/
|
|
static int oklabel(const char *src)
|
|
{
|
|
int c, i;
|
|
|
|
for (i = 0; i <= 11; i++) {
|
|
c = (u_char)*src++;
|
|
if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c))
|
|
break;
|
|
}
|
|
return i && !c;
|
|
}
|
|
|
|
/*
|
|
* Make a volume label.
|
|
*/
|
|
static void mklabel(u_int8_t *dest, const char *src)
|
|
{
|
|
int c, i;
|
|
|
|
for (i = 0; i < 11; i++) {
|
|
c = *src ? toupper(*src++) : ' ';
|
|
*dest++ = !i && c == '\xe5' ? 5 : c;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Copy string, padding with spaces.
|
|
*/
|
|
static void setstr(u_int8_t *dest, const char *src, size_t len)
|
|
{
|
|
while (len--)
|
|
*dest++ = *src ? *src++ : ' ';
|
|
}
|
|
|
|
/*
|
|
* Print usage message.
|
|
*/
|
|
static void usage(void)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: newfs_msdos [ -options ] special [disktype]\n"
|
|
"where the options are:\n"
|
|
"\t-@ create file system at specified offset\n"
|
|
"\t-A Attempt to cluster align root directory\n"
|
|
"\t-B get bootstrap from file\n"
|
|
"\t-C create image file with specified size\n"
|
|
"\t-F FAT type (12, 16, or 32)\n"
|
|
"\t-I volume ID\n"
|
|
"\t-L volume label\n"
|
|
"\t-N don't create file system: just print out parameters\n"
|
|
"\t-O OEM string\n"
|
|
"\t-S bytes/sector\n"
|
|
"\t-a sectors/FAT\n"
|
|
"\t-b block size\n"
|
|
"\t-c sectors/cluster\n"
|
|
"\t-e root directory entries\n"
|
|
"\t-f standard format\n"
|
|
"\t-h drive heads\n"
|
|
"\t-i file system info sector\n"
|
|
"\t-k backup boot sector\n"
|
|
"\t-m media descriptor\n"
|
|
"\t-n number of FATs\n"
|
|
"\t-o hidden sectors\n"
|
|
"\t-r reserved sectors\n"
|
|
"\t-s file system size (sectors)\n"
|
|
"\t-u sectors/track\n");
|
|
exit(1);
|
|
}
|