924 lines
26 KiB
C
924 lines
26 KiB
C
/*
|
|
* Copyright (c) 1998 Robert Nordier
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
|
|
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
|
|
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
|
|
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
|
|
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char rcsid[] =
|
|
"$Id: newfs_msdos.c,v 1.2 1998/07/15 06:30:38 charnier Exp $";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/diskslice.h>
|
|
#include <sys/disklabel.h>
|
|
#include <sys/mount.h>
|
|
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <paths.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#define MAXU16 0xffff /* maximum unsigned 16-bit quantity */
|
|
#define BPN 4 /* bits per nibble */
|
|
#define NPB 2 /* nibbles per byte */
|
|
|
|
#define DOSMAGIC 0xaa55 /* DOS magic number */
|
|
#define MINBPS 128 /* minimum bytes per sector */
|
|
#define MAXSPC 128 /* maximum sectors per cluster */
|
|
#define MAXNFT 16 /* maximum number of FATs */
|
|
#define DEFBLK 4096 /* default block size */
|
|
#define DEFBLK16 2048 /* default block size FAT16 */
|
|
#define DEFRDE 512 /* default root directory entries */
|
|
#define RESFTE 2 /* reserved FAT entries */
|
|
#define MINCLS12 1 /* minimum FAT12 clusters */
|
|
#define MINCLS16 0x1000 /* minimum FAT16 clusters */
|
|
#define MINCLS32 2 /* minimum FAT32 clusters */
|
|
#define MAXCLS12 0xfed /* maximum FAT12 clusters */
|
|
#define MAXCLS16 0xfff5 /* maximum FAT16 clusters */
|
|
#define MAXCLS32 0xffffff5 /* maximum FAT32 clusters */
|
|
|
|
#define mincls(fat) ((fat) == 12 ? MINCLS12 : \
|
|
(fat) == 16 ? MINCLS16 : \
|
|
MINCLS32)
|
|
|
|
#define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \
|
|
(fat) == 16 ? MAXCLS16 : \
|
|
MAXCLS32)
|
|
|
|
#define mk1(p, x) \
|
|
(p) = (u_int8_t)(x)
|
|
|
|
#define mk2(p, x) \
|
|
(p)[0] = (u_int8_t)(x), \
|
|
(p)[1] = (u_int8_t)((x) >> 010)
|
|
|
|
#define mk4(p, x) \
|
|
(p)[0] = (u_int8_t)(x), \
|
|
(p)[1] = (u_int8_t)((x) >> 010), \
|
|
(p)[2] = (u_int8_t)((x) >> 020), \
|
|
(p)[3] = (u_int8_t)((x) >> 030)
|
|
|
|
#define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg)
|
|
#define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg)
|
|
#define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg)
|
|
#define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg)
|
|
|
|
struct bs {
|
|
u_int8_t jmp[3]; /* bootstrap entry point */
|
|
u_int8_t oem[8]; /* OEM name and version */
|
|
};
|
|
|
|
struct bsbpb {
|
|
u_int8_t bps[2]; /* bytes per sector */
|
|
u_int8_t spc; /* sectors per cluster */
|
|
u_int8_t res[2]; /* reserved sectors */
|
|
u_int8_t nft; /* number of FATs */
|
|
u_int8_t rde[2]; /* root directory entries */
|
|
u_int8_t sec[2]; /* total sectors */
|
|
u_int8_t mid; /* media descriptor */
|
|
u_int8_t spf[2]; /* sectors per FAT */
|
|
u_int8_t spt[2]; /* sectors per track */
|
|
u_int8_t hds[2]; /* drive heads */
|
|
u_int8_t hid[4]; /* hidden sectors */
|
|
u_int8_t bsec[4]; /* big total sectors */
|
|
};
|
|
|
|
struct bsxbpb {
|
|
u_int8_t bspf[4]; /* big sectors per FAT */
|
|
u_int8_t xflg[2]; /* FAT control flags */
|
|
u_int8_t vers[2]; /* file system version */
|
|
u_int8_t rdcl[4]; /* root directory start cluster */
|
|
u_int8_t infs[2]; /* file system info sector */
|
|
u_int8_t bkbs[2]; /* backup boot sector */
|
|
u_int8_t rsvd[12]; /* reserved */
|
|
};
|
|
|
|
struct bsx {
|
|
u_int8_t drv; /* drive number */
|
|
u_int8_t rsvd; /* reserved */
|
|
u_int8_t sig; /* extended boot signature */
|
|
u_int8_t volid[4]; /* volume ID number */
|
|
u_int8_t label[11]; /* volume label */
|
|
u_int8_t type[8]; /* file system type */
|
|
};
|
|
|
|
struct de {
|
|
u_int8_t namext[11]; /* name and extension */
|
|
u_int8_t attr; /* attributes */
|
|
u_int8_t rsvd[10]; /* reserved */
|
|
u_int8_t time[2]; /* creation time */
|
|
u_int8_t date[2]; /* creation date */
|
|
u_int8_t clus[2]; /* starting cluster */
|
|
u_int8_t size[4]; /* size */
|
|
};
|
|
|
|
struct bpb {
|
|
u_int bps; /* bytes per sector */
|
|
u_int spc; /* sectors per cluster */
|
|
u_int res; /* reserved sectors */
|
|
u_int nft; /* number of FATs */
|
|
u_int rde; /* root directory entries */
|
|
u_int sec; /* total sectors */
|
|
u_int mid; /* media descriptor */
|
|
u_int spf; /* sectors per FAT */
|
|
u_int spt; /* sectors per track */
|
|
u_int hds; /* drive heads */
|
|
u_int hid; /* hidden sectors */
|
|
u_int bsec; /* big total sectors */
|
|
u_int bspf; /* big sectors per FAT */
|
|
u_int rdcl; /* root directory start cluster */
|
|
u_int infs; /* file system info sector */
|
|
u_int bkbs; /* backup boot sector */
|
|
};
|
|
|
|
static struct {
|
|
const char *name;
|
|
struct bpb bpb;
|
|
} stdfmt[] = {
|
|
{"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1}},
|
|
{"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1}},
|
|
{"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2}},
|
|
{"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2}},
|
|
{"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2}},
|
|
{"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2}},
|
|
{"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2}},
|
|
{"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2}}
|
|
};
|
|
|
|
static u_int8_t bootcode[] = {
|
|
0xfa, /* cli */
|
|
0x31, 0xc0, /* xor ax,ax */
|
|
0x8e, 0xd0, /* mov ss,ax */
|
|
0xbc, 0x00, 0x7c, /* mov sp,7c00h */
|
|
0xfb, /* sti */
|
|
0x8e, 0xd8, /* mov ds,ax */
|
|
0xe8, 0x00, 0x00, /* call $ + 3 */
|
|
0x5e, /* pop si */
|
|
0x83, 0xc6, 0x19, /* add si,+19h */
|
|
0xbb, 0x07, 0x00, /* mov bx,0007h */
|
|
0xfc, /* cld */
|
|
0xac, /* lodsb */
|
|
0x84, 0xc0, /* test al,al */
|
|
0x74, 0x06, /* jz $ + 8 */
|
|
0xb4, 0x0e, /* mov ah,0eh */
|
|
0xcd, 0x10, /* int 10h */
|
|
0xeb, 0xf5, /* jmp $ - 9 */
|
|
0x30, 0xe4, /* xor ah,ah */
|
|
0xcd, 0x16, /* int 16h */
|
|
0xcd, 0x19, /* int 19h */
|
|
0x0d, 0x0a,
|
|
'N', 'o', 'n', '-', 's', 'y', 's', 't',
|
|
'e', 'm', ' ', 'd', 'i', 's', 'k',
|
|
0x0d, 0x0a,
|
|
'P', 'r', 'e', 's', 's', ' ', 'a', 'n',
|
|
'y', ' ', 'k', 'e', 'y', ' ', 't', 'o',
|
|
' ', 'r', 'e', 'b', 'o', 'o', 't',
|
|
0x0d, 0x0a,
|
|
0
|
|
};
|
|
|
|
static void check_mounted(const char *, mode_t);
|
|
static void getstdfmt(const char *, struct bpb *);
|
|
static void getdiskinfo(int, const char *, const char *, int,
|
|
struct bpb *);
|
|
static void print_bpb(struct bpb *);
|
|
static u_int ckgeom(const char *, u_int, const char *);
|
|
static u_int argtou(const char *, u_int, u_int, const char *);
|
|
static int oklabel(const char *);
|
|
static void mklabel(u_int8_t *, const char *);
|
|
static void setstr(u_int8_t *, const char *, size_t);
|
|
static void usage(void);
|
|
|
|
/*
|
|
* Construct a FAT12, FAT16, or FAT32 file system.
|
|
*/
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
static char opts[] = "NB:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:r:s:u:";
|
|
static const char *opt_B, *opt_L, *opt_O, *opt_f;
|
|
static u_int opt_F, opt_I, opt_S, opt_a, opt_b, opt_c, opt_e;
|
|
static u_int opt_h, opt_i, opt_k, opt_m, opt_n, opt_o, opt_r;
|
|
static u_int opt_s, opt_u;
|
|
static int opt_N;
|
|
static int Iflag, mflag, oflag;
|
|
char buf[MAXPATHLEN];
|
|
struct stat sb;
|
|
struct timeval tv;
|
|
struct bpb bpb;
|
|
struct tm *tm;
|
|
struct bs *bs;
|
|
struct bsbpb *bsbpb;
|
|
struct bsxbpb *bsxbpb;
|
|
struct bsx *bsx;
|
|
struct de *de;
|
|
u_int8_t *img;
|
|
const char *fname, *dtype, *bname;
|
|
ssize_t n;
|
|
u_int fat, bss, rds, cls, dir, lsn, x, x1, x2;
|
|
int ch, fd, fd1;
|
|
|
|
while ((ch = getopt(argc, argv, opts)) != -1)
|
|
switch (ch) {
|
|
case 'N':
|
|
opt_N = 1;
|
|
break;
|
|
case 'B':
|
|
opt_B = optarg;
|
|
break;
|
|
case 'F':
|
|
if (strcmp(optarg, "12") &&
|
|
strcmp(optarg, "16") &&
|
|
strcmp(optarg, "32"))
|
|
errx(1, "%s: bad FAT type", optarg);
|
|
opt_F = atoi(optarg);
|
|
break;
|
|
case 'I':
|
|
opt_I = argto4(optarg, 0, "volume ID");
|
|
Iflag = 1;
|
|
break;
|
|
case 'L':
|
|
if (!oklabel(optarg))
|
|
errx(1, "%s: bad volume label", optarg);
|
|
opt_L = optarg;
|
|
break;
|
|
case 'O':
|
|
if (strlen(optarg) > 8)
|
|
errx(1, "%s: bad OEM string", optarg);
|
|
opt_O = optarg;
|
|
break;
|
|
case 'S':
|
|
opt_S = argto2(optarg, 1, "bytes/sector");
|
|
break;
|
|
case 'a':
|
|
opt_a = argto4(optarg, 1, "sectors/FAT");
|
|
break;
|
|
case 'b':
|
|
opt_b = argtox(optarg, 1, "block size");
|
|
opt_c = 0;
|
|
break;
|
|
case 'c':
|
|
opt_c = argto1(optarg, 1, "sectors/cluster");
|
|
opt_b = 0;
|
|
break;
|
|
case 'e':
|
|
opt_e = argto2(optarg, 1, "directory entries");
|
|
break;
|
|
case 'f':
|
|
opt_f = optarg;
|
|
break;
|
|
case 'h':
|
|
opt_h = argto2(optarg, 1, "drive heads");
|
|
break;
|
|
case 'i':
|
|
opt_i = argto2(optarg, 1, "info sector");
|
|
break;
|
|
case 'k':
|
|
opt_k = argto2(optarg, 1, "backup sector");
|
|
break;
|
|
case 'm':
|
|
opt_m = argto1(optarg, 0, "media descriptor");
|
|
mflag = 1;
|
|
break;
|
|
case 'n':
|
|
opt_n = argto1(optarg, 1, "number of FATs");
|
|
break;
|
|
case 'o':
|
|
opt_o = argto4(optarg, 0, "hidden sectors");
|
|
oflag = 1;
|
|
break;
|
|
case 'r':
|
|
opt_r = argto2(optarg, 1, "reserved sectors");
|
|
break;
|
|
case 's':
|
|
opt_s = argto4(optarg, 1, "file system size");
|
|
break;
|
|
case 'u':
|
|
opt_u = argto2(optarg, 1, "sectors/track");
|
|
break;
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
if (argc < 1 || argc > 2)
|
|
usage();
|
|
fname = *argv++;
|
|
if (!strchr(fname, '/')) {
|
|
snprintf(buf, sizeof(buf), "%sr%s", _PATH_DEV, fname);
|
|
if (stat(buf, &sb))
|
|
snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname);
|
|
if (!(fname = strdup(buf)))
|
|
err(1, NULL);
|
|
}
|
|
dtype = *argv;
|
|
if ((fd = open(fname, opt_N ? O_RDONLY : O_RDWR)) == -1 ||
|
|
fstat(fd, &sb))
|
|
err(1, "%s", fname);
|
|
if (!opt_N)
|
|
check_mounted(fname, sb.st_mode);
|
|
if (!S_ISCHR(sb.st_mode))
|
|
warnx("warning: %s is not a character device", fname);
|
|
memset(&bpb, 0, sizeof(bpb));
|
|
if (opt_f) {
|
|
getstdfmt(opt_f, &bpb);
|
|
bpb.bsec = bpb.sec;
|
|
bpb.sec = 0;
|
|
bpb.bspf = bpb.spf;
|
|
bpb.spf = 0;
|
|
}
|
|
if (opt_h)
|
|
bpb.hds = opt_h;
|
|
if (opt_u)
|
|
bpb.spt = opt_u;
|
|
if (opt_S)
|
|
bpb.bps = opt_S;
|
|
if (opt_s)
|
|
bpb.bsec = opt_s;
|
|
if (oflag)
|
|
bpb.hid = opt_o;
|
|
if (!(opt_f || (opt_h && opt_u && opt_S && opt_s && oflag)))
|
|
getdiskinfo(fd, fname, dtype, oflag, &bpb);
|
|
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 (0x%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), "/usr/mdec/%s", bname);
|
|
if (!(bname = strdup(buf)))
|
|
err(1, NULL);
|
|
}
|
|
if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb))
|
|
err(1, "%s", bname);
|
|
if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.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;
|
|
}
|
|
if (!bpb.res)
|
|
bpb.res = fat == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x;
|
|
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 (!bpb.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 (!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 / (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, "too few clusters for FAT%u", 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.bsec <= MAXU16 && bpb.hid <= MAXU16 &&
|
|
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);
|
|
tm = localtime(&tv.tv_sec);
|
|
if (!(img = malloc(bpb.bps)))
|
|
err(1, NULL);
|
|
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, 0, SEEK_SET))
|
|
err(1, "%s", bname);
|
|
}
|
|
if (opt_B && x < bss) {
|
|
if ((n = read(fd1, img, bpb.bps)) == -1)
|
|
err(1, "%s", bname);
|
|
if (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");
|
|
sprintf(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 + bpb.bps - 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 + bpb.bps - 28, 0x61417272);
|
|
mk4(img + bpb.bps - 24, 0xffffffff);
|
|
mk4(img + bpb.bps - 20, 2);
|
|
mk2(img + bpb.bps - 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 (n != bpb.bps)
|
|
errx(1, "%s: can't write sector %u", fname, lsn);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Exit with error if file system is mounted.
|
|
*/
|
|
static void
|
|
check_mounted(const char *fname, mode_t mode)
|
|
{
|
|
struct statfs *mp;
|
|
const char *s1, *s2;
|
|
size_t len;
|
|
int n, r;
|
|
|
|
if (!(n = getmntinfo(&mp, MNT_NOWAIT)))
|
|
err(1, "getmntinfo");
|
|
len = strlen(_PATH_DEV);
|
|
s1 = fname;
|
|
if (!strncmp(s1, _PATH_DEV, len))
|
|
s1 += len;
|
|
r = S_ISCHR(mode) && s1 != fname && *s1 == 'r';
|
|
for (; n--; mp++) {
|
|
s2 = mp->f_mntfromname;
|
|
if (!strncmp(s2, _PATH_DEV, len))
|
|
s2 += len;
|
|
if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) ||
|
|
!strcmp(s1, s2))
|
|
errx(1, "%s is mounted on %s", fname, mp->f_mntonname);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get a standard format.
|
|
*/
|
|
static void
|
|
getstdfmt(const char *fmt, struct bpb *bpb)
|
|
{
|
|
u_int x, i;
|
|
|
|
x = sizeof(stdfmt) / sizeof(stdfmt[0]);
|
|
for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++);
|
|
if (i == x)
|
|
errx(1, "%s: unknown standard format", fmt);
|
|
*bpb = stdfmt[i].bpb;
|
|
}
|
|
|
|
/*
|
|
* Get disk slice, partition, and geometry information.
|
|
*/
|
|
static void
|
|
getdiskinfo(int fd, const char *fname, const char *dtype, int oflag,
|
|
struct bpb *bpb)
|
|
{
|
|
struct diskslices ds;
|
|
struct disklabel dl, *lp;
|
|
const char *s1, *s2;
|
|
char *s;
|
|
int slice, part, fd1, i, e;
|
|
|
|
slice = part = -1;
|
|
s1 = fname;
|
|
if ((s2 = strrchr(s1, '/')))
|
|
s1 = s2 + 1;
|
|
for (s2 = s1; *s2 && !isdigit(*s2); s2++);
|
|
if (!*s2 || s2 == s1)
|
|
s2 = NULL;
|
|
else
|
|
while (isdigit(*++s2));
|
|
s1 = s2;
|
|
if (s2 && *s2 == 's') {
|
|
slice = (int)strtol(s2 + 1, &s, 10);
|
|
if (slice < 1 || slice > MAX_SLICES - BASE_SLICE)
|
|
s2 = NULL;
|
|
else {
|
|
slice = BASE_SLICE + slice - 1;
|
|
s2 = s;
|
|
}
|
|
}
|
|
if (s2 && *s2 >= 'a' && *s2 <= 'a' + MAXPARTITIONS - 1) {
|
|
if (slice == -1)
|
|
slice = COMPATIBILITY_SLICE;
|
|
part = *s2++ - 'a';
|
|
}
|
|
if (!s2 || (*s2 && *s2 != '.'))
|
|
errx(1, "%s: can't figure out partition info", fname);
|
|
if (slice != -1 && (!oflag || (!bpb->bsec && part == -1))) {
|
|
if (ioctl(fd, DIOCGSLICEINFO, &ds) == -1) {
|
|
warn("ioctl (GSLICEINFO)");
|
|
errx(1, "%s: can't get slice info", fname);
|
|
}
|
|
if (slice >= ds.dss_nslices || !ds.dss_slices[slice].ds_size)
|
|
errx(1, "%s: slice is unavailable", fname);
|
|
if (!oflag)
|
|
bpb->hid = (u_int32_t)ds.dss_slices[slice].ds_offset;
|
|
if (!bpb->bsec && part == -1)
|
|
bpb->bsec = (u_int32_t)ds.dss_slices[slice].ds_size;
|
|
}
|
|
if (((slice == -1 || part != -1) &&
|
|
((!oflag && part != -1) || !bpb->bsec)) ||
|
|
!bpb->bps || !bpb->spt || !bpb->hds) {
|
|
lp = &dl;
|
|
i = ioctl(fd, DIOCGDINFO, lp);
|
|
if (i == -1 && slice != -1 && part == -1) {
|
|
e = errno;
|
|
if (!(s = strdup(fname)))
|
|
err(1, NULL);
|
|
s[s1 - fname] = 0;
|
|
if ((fd1 = open(s, O_RDONLY)) != -1) {
|
|
i = ioctl(fd1, DIOCGDINFO, lp);
|
|
close(fd1);
|
|
}
|
|
free(s);
|
|
errno = e;
|
|
}
|
|
if (i == -1)
|
|
if (!dtype) {
|
|
warn("ioctl (GDINFO)");
|
|
errx(1, "%s: can't read disk label; "
|
|
"disk type must be specified", fname);
|
|
} else if (!(lp = getdiskbyname(dtype)))
|
|
errx(1, "%s: unknown disk type", dtype);
|
|
if (slice == -1 || part != -1) {
|
|
if (part == -1)
|
|
part = RAW_PART;
|
|
if (part >= lp->d_npartitions ||
|
|
!lp->d_partitions[part].p_size)
|
|
errx(1, "%s: partition is unavailable", fname);
|
|
if (!oflag && part != -1)
|
|
bpb->hid += lp->d_partitions[part].p_offset;
|
|
if (!bpb->bsec)
|
|
bpb->bsec = lp->d_partitions[part].p_size;
|
|
}
|
|
if (!bpb->bps)
|
|
bpb->bps = ckgeom(fname, lp->d_secsize, "bytes/sector");
|
|
if (!bpb->spt)
|
|
bpb->spt = ckgeom(fname, lp->d_nsectors, "sectors/track");
|
|
if (!bpb->hds)
|
|
bpb->hds = ckgeom(fname, lp->d_ntracks, "drive heads");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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=0x%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 ? "0x%x" : "%u", bpb->infs);
|
|
printf(" bkbs=");
|
|
printf(bpb->bkbs == MAXU16 ? "0x%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", fname, msg);
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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");
|
|
fprintf(stderr, "where the options are:\n");
|
|
fprintf(stderr, "\t-N don't create file system: "
|
|
"just print out parameters\n");
|
|
fprintf(stderr, "\t-B get bootstrap from file\n");
|
|
fprintf(stderr, "\t-F FAT type (12, 16, or 32)\n");
|
|
fprintf(stderr, "\t-I volume ID\n");
|
|
fprintf(stderr, "\t-L volume label\n");
|
|
fprintf(stderr, "\t-O OEM string\n");
|
|
fprintf(stderr, "\t-S bytes/sector\n");
|
|
fprintf(stderr, "\t-a sectors/FAT\n");
|
|
fprintf(stderr, "\t-b block size\n");
|
|
fprintf(stderr, "\t-c sectors/cluster\n");
|
|
fprintf(stderr, "\t-e root directory entries\n");
|
|
fprintf(stderr, "\t-f standard format\n");
|
|
fprintf(stderr, "\t-h drive heads\n");
|
|
fprintf(stderr, "\t-i file system info sector\n");
|
|
fprintf(stderr, "\t-k backup boot sector\n");
|
|
fprintf(stderr, "\t-m media descriptor\n");
|
|
fprintf(stderr, "\t-n number of FATs\n");
|
|
fprintf(stderr, "\t-o hidden sectors\n");
|
|
fprintf(stderr, "\t-r reserved sectors\n");
|
|
fprintf(stderr, "\t-s file system size (sectors)\n");
|
|
fprintf(stderr, "\t-u sectors/track\n");
|
|
exit(1);
|
|
}
|