newfs_msdos.c revision 40487
137446Srnordier/* 237446Srnordier * Copyright (c) 1998 Robert Nordier 337446Srnordier * All rights reserved. 437446Srnordier * 537446Srnordier * Redistribution and use in source and binary forms, with or without 637446Srnordier * modification, are permitted provided that the following conditions 737446Srnordier * are met: 837446Srnordier * 1. Redistributions of source code must retain the above copyright 937446Srnordier * notice, this list of conditions and the following disclaimer. 1037446Srnordier * 2. Redistributions in binary form must reproduce the above copyright 1137446Srnordier * notice, this list of conditions and the following disclaimer in 1237446Srnordier * the documentation and/or other materials provided with the 1337446Srnordier * distribution. 1437446Srnordier * 1537446Srnordier * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS 1637446Srnordier * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 1737446Srnordier * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1837446Srnordier * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY 1937446Srnordier * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2037446Srnordier * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 2137446Srnordier * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2237446Srnordier * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 2337446Srnordier * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 2437446Srnordier * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 2537446Srnordier * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2637446Srnordier */ 2737446Srnordier 2837446Srnordier#ifndef lint 2937446Srnordierstatic const char rcsid[] = 3040487Sbde "$Id: newfs_msdos.c,v 1.4 1998/07/19 15:02:39 rnordier Exp $"; 3137446Srnordier#endif /* not lint */ 3237446Srnordier 3337446Srnordier#include <sys/param.h> 3437446Srnordier#include <sys/stat.h> 3537446Srnordier#include <sys/diskslice.h> 3637446Srnordier#include <sys/disklabel.h> 3737446Srnordier#include <sys/mount.h> 3837446Srnordier 3937446Srnordier#include <ctype.h> 4037446Srnordier#include <err.h> 4137446Srnordier#include <errno.h> 4237446Srnordier#include <fcntl.h> 4337446Srnordier#include <paths.h> 4437446Srnordier#include <stdio.h> 4537446Srnordier#include <stdlib.h> 4637446Srnordier#include <string.h> 4737446Srnordier#include <unistd.h> 4837446Srnordier 4937446Srnordier#define MAXU16 0xffff /* maximum unsigned 16-bit quantity */ 5037446Srnordier#define BPN 4 /* bits per nibble */ 5137446Srnordier#define NPB 2 /* nibbles per byte */ 5237446Srnordier 5337446Srnordier#define DOSMAGIC 0xaa55 /* DOS magic number */ 5437446Srnordier#define MINBPS 128 /* minimum bytes per sector */ 5537446Srnordier#define MAXSPC 128 /* maximum sectors per cluster */ 5637446Srnordier#define MAXNFT 16 /* maximum number of FATs */ 5737446Srnordier#define DEFBLK 4096 /* default block size */ 5837446Srnordier#define DEFBLK16 2048 /* default block size FAT16 */ 5937446Srnordier#define DEFRDE 512 /* default root directory entries */ 6037446Srnordier#define RESFTE 2 /* reserved FAT entries */ 6137446Srnordier#define MINCLS12 1 /* minimum FAT12 clusters */ 6237446Srnordier#define MINCLS16 0x1000 /* minimum FAT16 clusters */ 6337446Srnordier#define MINCLS32 2 /* minimum FAT32 clusters */ 6437446Srnordier#define MAXCLS12 0xfed /* maximum FAT12 clusters */ 6537446Srnordier#define MAXCLS16 0xfff5 /* maximum FAT16 clusters */ 6637446Srnordier#define MAXCLS32 0xffffff5 /* maximum FAT32 clusters */ 6737446Srnordier 6837446Srnordier#define mincls(fat) ((fat) == 12 ? MINCLS12 : \ 6937446Srnordier (fat) == 16 ? MINCLS16 : \ 7037446Srnordier MINCLS32) 7137446Srnordier 7237446Srnordier#define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \ 7337446Srnordier (fat) == 16 ? MAXCLS16 : \ 7437446Srnordier MAXCLS32) 7537446Srnordier 7637446Srnordier#define mk1(p, x) \ 7737446Srnordier (p) = (u_int8_t)(x) 7837446Srnordier 7937446Srnordier#define mk2(p, x) \ 8037446Srnordier (p)[0] = (u_int8_t)(x), \ 8137446Srnordier (p)[1] = (u_int8_t)((x) >> 010) 8237446Srnordier 8337446Srnordier#define mk4(p, x) \ 8437446Srnordier (p)[0] = (u_int8_t)(x), \ 8537446Srnordier (p)[1] = (u_int8_t)((x) >> 010), \ 8637446Srnordier (p)[2] = (u_int8_t)((x) >> 020), \ 8737446Srnordier (p)[3] = (u_int8_t)((x) >> 030) 8837446Srnordier 8937446Srnordier#define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg) 9037446Srnordier#define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg) 9137446Srnordier#define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg) 9237446Srnordier#define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg) 9337446Srnordier 9437446Srnordierstruct bs { 9537446Srnordier u_int8_t jmp[3]; /* bootstrap entry point */ 9637446Srnordier u_int8_t oem[8]; /* OEM name and version */ 9737446Srnordier}; 9837446Srnordier 9937446Srnordierstruct bsbpb { 10037446Srnordier u_int8_t bps[2]; /* bytes per sector */ 10137446Srnordier u_int8_t spc; /* sectors per cluster */ 10237446Srnordier u_int8_t res[2]; /* reserved sectors */ 10337446Srnordier u_int8_t nft; /* number of FATs */ 10437446Srnordier u_int8_t rde[2]; /* root directory entries */ 10537446Srnordier u_int8_t sec[2]; /* total sectors */ 10637446Srnordier u_int8_t mid; /* media descriptor */ 10737446Srnordier u_int8_t spf[2]; /* sectors per FAT */ 10837446Srnordier u_int8_t spt[2]; /* sectors per track */ 10937446Srnordier u_int8_t hds[2]; /* drive heads */ 11037446Srnordier u_int8_t hid[4]; /* hidden sectors */ 11137446Srnordier u_int8_t bsec[4]; /* big total sectors */ 11237446Srnordier}; 11337446Srnordier 11437446Srnordierstruct bsxbpb { 11537446Srnordier u_int8_t bspf[4]; /* big sectors per FAT */ 11637446Srnordier u_int8_t xflg[2]; /* FAT control flags */ 11737446Srnordier u_int8_t vers[2]; /* file system version */ 11837446Srnordier u_int8_t rdcl[4]; /* root directory start cluster */ 11937446Srnordier u_int8_t infs[2]; /* file system info sector */ 12037446Srnordier u_int8_t bkbs[2]; /* backup boot sector */ 12137446Srnordier u_int8_t rsvd[12]; /* reserved */ 12237446Srnordier}; 12337446Srnordier 12437446Srnordierstruct bsx { 12537446Srnordier u_int8_t drv; /* drive number */ 12637446Srnordier u_int8_t rsvd; /* reserved */ 12737446Srnordier u_int8_t sig; /* extended boot signature */ 12837446Srnordier u_int8_t volid[4]; /* volume ID number */ 12937446Srnordier u_int8_t label[11]; /* volume label */ 13037446Srnordier u_int8_t type[8]; /* file system type */ 13137446Srnordier}; 13237446Srnordier 13337446Srnordierstruct de { 13437446Srnordier u_int8_t namext[11]; /* name and extension */ 13537446Srnordier u_int8_t attr; /* attributes */ 13637446Srnordier u_int8_t rsvd[10]; /* reserved */ 13737446Srnordier u_int8_t time[2]; /* creation time */ 13837446Srnordier u_int8_t date[2]; /* creation date */ 13937446Srnordier u_int8_t clus[2]; /* starting cluster */ 14037446Srnordier u_int8_t size[4]; /* size */ 14137446Srnordier}; 14237446Srnordier 14337446Srnordierstruct bpb { 14437446Srnordier u_int bps; /* bytes per sector */ 14537446Srnordier u_int spc; /* sectors per cluster */ 14637446Srnordier u_int res; /* reserved sectors */ 14737446Srnordier u_int nft; /* number of FATs */ 14837446Srnordier u_int rde; /* root directory entries */ 14937446Srnordier u_int sec; /* total sectors */ 15037446Srnordier u_int mid; /* media descriptor */ 15137446Srnordier u_int spf; /* sectors per FAT */ 15237446Srnordier u_int spt; /* sectors per track */ 15337446Srnordier u_int hds; /* drive heads */ 15437446Srnordier u_int hid; /* hidden sectors */ 15537446Srnordier u_int bsec; /* big total sectors */ 15637446Srnordier u_int bspf; /* big sectors per FAT */ 15737446Srnordier u_int rdcl; /* root directory start cluster */ 15837446Srnordier u_int infs; /* file system info sector */ 15937446Srnordier u_int bkbs; /* backup boot sector */ 16037446Srnordier}; 16137446Srnordier 16237446Srnordierstatic struct { 16337446Srnordier const char *name; 16437446Srnordier struct bpb bpb; 16537446Srnordier} stdfmt[] = { 16637446Srnordier {"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1}}, 16737446Srnordier {"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1}}, 16837446Srnordier {"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2}}, 16937446Srnordier {"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2}}, 17037446Srnordier {"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2}}, 17137446Srnordier {"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2}}, 17237446Srnordier {"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2}}, 17337446Srnordier {"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2}} 17437446Srnordier}; 17537446Srnordier 17637446Srnordierstatic u_int8_t bootcode[] = { 17737446Srnordier 0xfa, /* cli */ 17837446Srnordier 0x31, 0xc0, /* xor ax,ax */ 17937446Srnordier 0x8e, 0xd0, /* mov ss,ax */ 18037446Srnordier 0xbc, 0x00, 0x7c, /* mov sp,7c00h */ 18137446Srnordier 0xfb, /* sti */ 18237446Srnordier 0x8e, 0xd8, /* mov ds,ax */ 18337446Srnordier 0xe8, 0x00, 0x00, /* call $ + 3 */ 18437446Srnordier 0x5e, /* pop si */ 18537446Srnordier 0x83, 0xc6, 0x19, /* add si,+19h */ 18637446Srnordier 0xbb, 0x07, 0x00, /* mov bx,0007h */ 18737446Srnordier 0xfc, /* cld */ 18837446Srnordier 0xac, /* lodsb */ 18937446Srnordier 0x84, 0xc0, /* test al,al */ 19037446Srnordier 0x74, 0x06, /* jz $ + 8 */ 19137446Srnordier 0xb4, 0x0e, /* mov ah,0eh */ 19237446Srnordier 0xcd, 0x10, /* int 10h */ 19337446Srnordier 0xeb, 0xf5, /* jmp $ - 9 */ 19437446Srnordier 0x30, 0xe4, /* xor ah,ah */ 19537446Srnordier 0xcd, 0x16, /* int 16h */ 19637446Srnordier 0xcd, 0x19, /* int 19h */ 19737446Srnordier 0x0d, 0x0a, 19837446Srnordier 'N', 'o', 'n', '-', 's', 'y', 's', 't', 19937446Srnordier 'e', 'm', ' ', 'd', 'i', 's', 'k', 20037446Srnordier 0x0d, 0x0a, 20137446Srnordier 'P', 'r', 'e', 's', 's', ' ', 'a', 'n', 20237446Srnordier 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o', 20337446Srnordier ' ', 'r', 'e', 'b', 'o', 'o', 't', 20437446Srnordier 0x0d, 0x0a, 20537446Srnordier 0 20637446Srnordier}; 20737446Srnordier 20837446Srnordierstatic void check_mounted(const char *, mode_t); 20937446Srnordierstatic void getstdfmt(const char *, struct bpb *); 21037446Srnordierstatic void getdiskinfo(int, const char *, const char *, int, 21137446Srnordier struct bpb *); 21237446Srnordierstatic void print_bpb(struct bpb *); 21337446Srnordierstatic u_int ckgeom(const char *, u_int, const char *); 21437446Srnordierstatic u_int argtou(const char *, u_int, u_int, const char *); 21537446Srnordierstatic int oklabel(const char *); 21637446Srnordierstatic void mklabel(u_int8_t *, const char *); 21737446Srnordierstatic void setstr(u_int8_t *, const char *, size_t); 21837446Srnordierstatic void usage(void); 21937446Srnordier 22037446Srnordier/* 22137446Srnordier * Construct a FAT12, FAT16, or FAT32 file system. 22237446Srnordier */ 22337446Srnordierint 22437446Srnordiermain(int argc, char *argv[]) 22537446Srnordier{ 22637446Srnordier static char opts[] = "NB:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:r:s:u:"; 22737446Srnordier static const char *opt_B, *opt_L, *opt_O, *opt_f; 22837446Srnordier static u_int opt_F, opt_I, opt_S, opt_a, opt_b, opt_c, opt_e; 22937446Srnordier static u_int opt_h, opt_i, opt_k, opt_m, opt_n, opt_o, opt_r; 23037446Srnordier static u_int opt_s, opt_u; 23137446Srnordier static int opt_N; 23237446Srnordier static int Iflag, mflag, oflag; 23337446Srnordier char buf[MAXPATHLEN]; 23437446Srnordier struct stat sb; 23537446Srnordier struct timeval tv; 23637446Srnordier struct bpb bpb; 23737446Srnordier struct tm *tm; 23837446Srnordier struct bs *bs; 23937446Srnordier struct bsbpb *bsbpb; 24037446Srnordier struct bsxbpb *bsxbpb; 24137446Srnordier struct bsx *bsx; 24237446Srnordier struct de *de; 24337446Srnordier u_int8_t *img; 24437446Srnordier const char *fname, *dtype, *bname; 24537446Srnordier ssize_t n; 24640487Sbde time_t now; 24737446Srnordier u_int fat, bss, rds, cls, dir, lsn, x, x1, x2; 24837446Srnordier int ch, fd, fd1; 24937446Srnordier 25037446Srnordier while ((ch = getopt(argc, argv, opts)) != -1) 25137446Srnordier switch (ch) { 25237446Srnordier case 'N': 25337446Srnordier opt_N = 1; 25437446Srnordier break; 25537446Srnordier case 'B': 25637446Srnordier opt_B = optarg; 25737446Srnordier break; 25837446Srnordier case 'F': 25937446Srnordier if (strcmp(optarg, "12") && 26037446Srnordier strcmp(optarg, "16") && 26137446Srnordier strcmp(optarg, "32")) 26237446Srnordier errx(1, "%s: bad FAT type", optarg); 26337446Srnordier opt_F = atoi(optarg); 26437446Srnordier break; 26537446Srnordier case 'I': 26637446Srnordier opt_I = argto4(optarg, 0, "volume ID"); 26737446Srnordier Iflag = 1; 26837446Srnordier break; 26937446Srnordier case 'L': 27037446Srnordier if (!oklabel(optarg)) 27137446Srnordier errx(1, "%s: bad volume label", optarg); 27237446Srnordier opt_L = optarg; 27337446Srnordier break; 27437446Srnordier case 'O': 27537446Srnordier if (strlen(optarg) > 8) 27637446Srnordier errx(1, "%s: bad OEM string", optarg); 27737446Srnordier opt_O = optarg; 27837446Srnordier break; 27937446Srnordier case 'S': 28037446Srnordier opt_S = argto2(optarg, 1, "bytes/sector"); 28137446Srnordier break; 28237446Srnordier case 'a': 28337446Srnordier opt_a = argto4(optarg, 1, "sectors/FAT"); 28437446Srnordier break; 28537446Srnordier case 'b': 28637446Srnordier opt_b = argtox(optarg, 1, "block size"); 28737446Srnordier opt_c = 0; 28837446Srnordier break; 28937446Srnordier case 'c': 29037446Srnordier opt_c = argto1(optarg, 1, "sectors/cluster"); 29137446Srnordier opt_b = 0; 29237446Srnordier break; 29337446Srnordier case 'e': 29437446Srnordier opt_e = argto2(optarg, 1, "directory entries"); 29537446Srnordier break; 29637446Srnordier case 'f': 29737446Srnordier opt_f = optarg; 29837446Srnordier break; 29937446Srnordier case 'h': 30037446Srnordier opt_h = argto2(optarg, 1, "drive heads"); 30137446Srnordier break; 30237446Srnordier case 'i': 30337446Srnordier opt_i = argto2(optarg, 1, "info sector"); 30437446Srnordier break; 30537446Srnordier case 'k': 30637446Srnordier opt_k = argto2(optarg, 1, "backup sector"); 30737446Srnordier break; 30837446Srnordier case 'm': 30937446Srnordier opt_m = argto1(optarg, 0, "media descriptor"); 31037446Srnordier mflag = 1; 31137446Srnordier break; 31237446Srnordier case 'n': 31337446Srnordier opt_n = argto1(optarg, 1, "number of FATs"); 31437446Srnordier break; 31537446Srnordier case 'o': 31637446Srnordier opt_o = argto4(optarg, 0, "hidden sectors"); 31737446Srnordier oflag = 1; 31837446Srnordier break; 31937446Srnordier case 'r': 32037446Srnordier opt_r = argto2(optarg, 1, "reserved sectors"); 32137446Srnordier break; 32237446Srnordier case 's': 32337446Srnordier opt_s = argto4(optarg, 1, "file system size"); 32437446Srnordier break; 32537446Srnordier case 'u': 32637446Srnordier opt_u = argto2(optarg, 1, "sectors/track"); 32737446Srnordier break; 32837446Srnordier default: 32937446Srnordier usage(); 33037446Srnordier } 33137446Srnordier argc -= optind; 33237446Srnordier argv += optind; 33337446Srnordier if (argc < 1 || argc > 2) 33437446Srnordier usage(); 33537446Srnordier fname = *argv++; 33637446Srnordier if (!strchr(fname, '/')) { 33737446Srnordier snprintf(buf, sizeof(buf), "%sr%s", _PATH_DEV, fname); 33837446Srnordier if (stat(buf, &sb)) 33937446Srnordier snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname); 34037446Srnordier if (!(fname = strdup(buf))) 34137446Srnordier err(1, NULL); 34237446Srnordier } 34337446Srnordier dtype = *argv; 34437446Srnordier if ((fd = open(fname, opt_N ? O_RDONLY : O_RDWR)) == -1 || 34537446Srnordier fstat(fd, &sb)) 34637446Srnordier err(1, "%s", fname); 34737446Srnordier if (!opt_N) 34837446Srnordier check_mounted(fname, sb.st_mode); 34937446Srnordier if (!S_ISCHR(sb.st_mode)) 35037446Srnordier warnx("warning: %s is not a character device", fname); 35137446Srnordier memset(&bpb, 0, sizeof(bpb)); 35237446Srnordier if (opt_f) { 35337446Srnordier getstdfmt(opt_f, &bpb); 35437446Srnordier bpb.bsec = bpb.sec; 35537446Srnordier bpb.sec = 0; 35637446Srnordier bpb.bspf = bpb.spf; 35737446Srnordier bpb.spf = 0; 35837446Srnordier } 35937446Srnordier if (opt_h) 36037446Srnordier bpb.hds = opt_h; 36137446Srnordier if (opt_u) 36237446Srnordier bpb.spt = opt_u; 36337446Srnordier if (opt_S) 36437446Srnordier bpb.bps = opt_S; 36537446Srnordier if (opt_s) 36637446Srnordier bpb.bsec = opt_s; 36737446Srnordier if (oflag) 36837446Srnordier bpb.hid = opt_o; 36937446Srnordier if (!(opt_f || (opt_h && opt_u && opt_S && opt_s && oflag))) 37037446Srnordier getdiskinfo(fd, fname, dtype, oflag, &bpb); 37137446Srnordier if (!powerof2(bpb.bps)) 37237446Srnordier errx(1, "bytes/sector (%u) is not a power of 2", bpb.bps); 37337446Srnordier if (bpb.bps < MINBPS) 37437446Srnordier errx(1, "bytes/sector (%u) is too small; minimum is %u", 37537446Srnordier bpb.bps, MINBPS); 37637446Srnordier if (!(fat = opt_F)) 37737446Srnordier if (opt_f) 37837446Srnordier fat = 12; 37937446Srnordier else if (!opt_e && (opt_i || opt_k)) 38037446Srnordier fat = 32; 38137446Srnordier if ((fat == 32 && opt_e) || (fat != 32 && (opt_i || opt_k))) 38237446Srnordier errx(1, "-%c is not a legal FAT%s option", 38337446Srnordier fat == 32 ? 'e' : opt_i ? 'i' : 'k', 38437446Srnordier fat == 32 ? "32" : "12/16"); 38537446Srnordier if (opt_f && fat == 32) 38637446Srnordier bpb.rde = 0; 38737446Srnordier if (opt_b) { 38837446Srnordier if (!powerof2(opt_b)) 38937446Srnordier errx(1, "block size (%u) is not a power of 2", opt_b); 39037446Srnordier if (opt_b < bpb.bps) 39137446Srnordier errx(1, "block size (%u) is too small; minimum is %u", 39237446Srnordier opt_b, bpb.bps); 39337446Srnordier if (opt_b > bpb.bps * MAXSPC) 39437446Srnordier errx(1, "block size (%u) is too large; maximum is %u", 39537446Srnordier opt_b, bpb.bps * MAXSPC); 39637446Srnordier bpb.spc = opt_b / bpb.bps; 39737446Srnordier } 39837446Srnordier if (opt_c) { 39937446Srnordier if (!powerof2(opt_c)) 40037446Srnordier errx(1, "sectors/cluster (%u) is not a power of 2", opt_c); 40137446Srnordier bpb.spc = opt_c; 40237446Srnordier } 40337446Srnordier if (opt_r) 40437446Srnordier bpb.res = opt_r; 40537446Srnordier if (opt_n) { 40637446Srnordier if (opt_n > MAXNFT) 40737446Srnordier errx(1, "number of FATs (%u) is too large; maximum is %u", 40837446Srnordier opt_n, MAXNFT); 40937446Srnordier bpb.nft = opt_n; 41037446Srnordier } 41137446Srnordier if (opt_e) 41237446Srnordier bpb.rde = opt_e; 41337446Srnordier if (mflag) { 41437446Srnordier if (opt_m < 0xf0) 41537446Srnordier errx(1, "illegal media descriptor (0x%x)", opt_m); 41637446Srnordier bpb.mid = opt_m; 41737446Srnordier } 41837446Srnordier if (opt_a) 41937446Srnordier bpb.bspf = opt_a; 42037446Srnordier if (opt_i) 42137446Srnordier bpb.infs = opt_i; 42237446Srnordier if (opt_k) 42337446Srnordier bpb.bkbs = opt_k; 42437446Srnordier bss = 1; 42537446Srnordier bname = NULL; 42637446Srnordier fd1 = -1; 42737446Srnordier if (opt_B) { 42837446Srnordier bname = opt_B; 42937446Srnordier if (!strchr(bname, '/')) { 43037446Srnordier snprintf(buf, sizeof(buf), "/usr/mdec/%s", bname); 43137446Srnordier if (!(bname = strdup(buf))) 43237446Srnordier err(1, NULL); 43337446Srnordier } 43437446Srnordier if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) 43537446Srnordier err(1, "%s", bname); 43637446Srnordier if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bps || 43737446Srnordier sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU16) 43837446Srnordier errx(1, "%s: inappropriate file type or format", bname); 43937446Srnordier bss = sb.st_size / bpb.bps; 44037446Srnordier } 44137446Srnordier if (!bpb.nft) 44237446Srnordier bpb.nft = 2; 44337446Srnordier if (!fat) 44437446Srnordier if (bpb.bsec < (bpb.res ? bpb.res : bss) + 44537446Srnordier howmany((RESFTE + (bpb.spc ? MINCLS16 : MAXCLS12 + 1)) * 44637446Srnordier ((bpb.spc ? 16 : 12) / BPN), bpb.bps * NPB) * 44737446Srnordier bpb.nft + 44837446Srnordier howmany(bpb.rde ? bpb.rde : DEFRDE, 44937446Srnordier bpb.bps / sizeof(struct de)) + 45037446Srnordier (bpb.spc ? MINCLS16 : MAXCLS12 + 1) * 45137446Srnordier (bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps))) 45237446Srnordier fat = 12; 45337446Srnordier else if (bpb.rde || bpb.bsec < 45437446Srnordier (bpb.res ? bpb.res : bss) + 45537446Srnordier howmany((RESFTE + MAXCLS16) * 2, bpb.bps) * bpb.nft + 45637446Srnordier howmany(DEFRDE, bpb.bps / sizeof(struct de)) + 45737446Srnordier (MAXCLS16 + 1) * 45837446Srnordier (bpb.spc ? bpb.spc : howmany(8192, bpb.bps))) 45937446Srnordier fat = 16; 46037446Srnordier else 46137446Srnordier fat = 32; 46237446Srnordier x = bss; 46337446Srnordier if (fat == 32) { 46437446Srnordier if (!bpb.infs) { 46537446Srnordier if (x == MAXU16 || x == bpb.bkbs) 46637446Srnordier errx(1, "no room for info sector"); 46737446Srnordier bpb.infs = x; 46837446Srnordier } 46937446Srnordier if (bpb.infs != MAXU16 && x <= bpb.infs) 47037446Srnordier x = bpb.infs + 1; 47137446Srnordier if (!bpb.bkbs) { 47237446Srnordier if (x == MAXU16) 47337446Srnordier errx(1, "no room for backup sector"); 47437446Srnordier bpb.bkbs = x; 47537446Srnordier } else if (bpb.bkbs != MAXU16 && bpb.bkbs == bpb.infs) 47637446Srnordier errx(1, "backup sector would overwrite info sector"); 47737446Srnordier if (bpb.bkbs != MAXU16 && x <= bpb.bkbs) 47837446Srnordier x = bpb.bkbs + 1; 47937446Srnordier } 48037446Srnordier if (!bpb.res) 48137446Srnordier bpb.res = fat == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x; 48237446Srnordier else if (bpb.res < x) 48337446Srnordier errx(1, "too few reserved sectors"); 48437446Srnordier if (fat != 32 && !bpb.rde) 48537446Srnordier bpb.rde = DEFRDE; 48637446Srnordier rds = howmany(bpb.rde, bpb.bps / sizeof(struct de)); 48737446Srnordier if (!bpb.spc) 48837446Srnordier for (bpb.spc = howmany(fat == 16 ? DEFBLK16 : DEFBLK, bpb.bps); 48937446Srnordier bpb.spc < MAXSPC && 49037446Srnordier bpb.res + 49137446Srnordier howmany((RESFTE + maxcls(fat)) * (fat / BPN), 49237446Srnordier bpb.bps * NPB) * bpb.nft + 49337446Srnordier rds + 49437446Srnordier (u_int64_t)(maxcls(fat) + 1) * bpb.spc <= bpb.bsec; 49537446Srnordier bpb.spc <<= 1); 49637446Srnordier if (fat != 32 && bpb.bspf > MAXU16) 49737446Srnordier errx(1, "too many sectors/FAT for FAT12/16"); 49837446Srnordier x1 = bpb.res + rds; 49937446Srnordier x = bpb.bspf ? bpb.bspf : 1; 50037446Srnordier if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) 50137446Srnordier errx(1, "meta data exceeds file system size"); 50237446Srnordier x1 += x * bpb.nft; 50337446Srnordier x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB / 50437446Srnordier (bpb.spc * bpb.bps * NPB + fat / BPN * bpb.nft); 50537446Srnordier x2 = howmany((RESFTE + MIN(x, maxcls(fat))) * (fat / BPN), 50637446Srnordier bpb.bps * NPB); 50737446Srnordier if (!bpb.bspf) { 50837446Srnordier bpb.bspf = x2; 50937446Srnordier x1 += (bpb.bspf - 1) * bpb.nft; 51037446Srnordier } 51137446Srnordier cls = (bpb.bsec - x1) / bpb.spc; 51237446Srnordier x = (u_int64_t)bpb.bspf * bpb.bps * NPB / (fat / BPN) - RESFTE; 51337446Srnordier if (cls > x) 51437446Srnordier cls = x; 51537446Srnordier if (bpb.bspf < x2) 51637446Srnordier warnx("warning: sectors/FAT limits file system to %u clusters", 51737446Srnordier cls); 51837446Srnordier if (cls < mincls(fat)) 51937446Srnordier errx(1, "too few clusters for FAT%u", fat); 52037446Srnordier if (cls > maxcls(fat)) { 52137446Srnordier cls = maxcls(fat); 52237446Srnordier bpb.bsec = x1 + (cls + 1) * bpb.spc - 1; 52337446Srnordier warnx("warning: FAT type limits file system to %u sectors", 52437446Srnordier bpb.bsec); 52537446Srnordier } 52637446Srnordier printf("%s: %u sector%s in %u FAT%u cluster%s " 52737446Srnordier "(%u bytes/cluster)\n", fname, cls * bpb.spc, 52837446Srnordier cls * bpb.spc == 1 ? "" : "s", cls, fat, 52937446Srnordier cls == 1 ? "" : "s", bpb.bps * bpb.spc); 53037446Srnordier if (!bpb.mid) 53137446Srnordier bpb.mid = !bpb.hid ? 0xf0 : 0xf8; 53237446Srnordier if (fat == 32) 53337446Srnordier bpb.rdcl = RESFTE; 53437759Srnordier if (bpb.hid + bpb.bsec <= MAXU16) { 53537446Srnordier bpb.sec = bpb.bsec; 53637446Srnordier bpb.bsec = 0; 53737446Srnordier } 53837446Srnordier if (fat != 32) { 53937446Srnordier bpb.spf = bpb.bspf; 54037446Srnordier bpb.bspf = 0; 54137446Srnordier } 54237446Srnordier print_bpb(&bpb); 54337446Srnordier if (!opt_N) { 54437446Srnordier gettimeofday(&tv, NULL); 54540487Sbde now = tv.tv_sec; 54640487Sbde tm = localtime(&now); 54737446Srnordier if (!(img = malloc(bpb.bps))) 54837446Srnordier err(1, NULL); 54937446Srnordier dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft; 55037446Srnordier for (lsn = 0; lsn < dir + (fat == 32 ? bpb.spc : rds); lsn++) { 55137446Srnordier x = lsn; 55237446Srnordier if (opt_B && 55337446Srnordier fat == 32 && bpb.bkbs != MAXU16 && 55437446Srnordier bss <= bpb.bkbs && x >= bpb.bkbs) { 55537446Srnordier x -= bpb.bkbs; 55637446Srnordier if (!x && lseek(fd1, 0, SEEK_SET)) 55737446Srnordier err(1, "%s", bname); 55837446Srnordier } 55937446Srnordier if (opt_B && x < bss) { 56037446Srnordier if ((n = read(fd1, img, bpb.bps)) == -1) 56137446Srnordier err(1, "%s", bname); 56237446Srnordier if (n != bpb.bps) 56337446Srnordier errx(1, "%s: can't read sector %u", bname, x); 56437446Srnordier } else 56537446Srnordier memset(img, 0, bpb.bps); 56637446Srnordier if (!lsn || 56737446Srnordier (fat == 32 && bpb.bkbs != MAXU16 && lsn == bpb.bkbs)) { 56837446Srnordier x1 = sizeof(struct bs); 56937446Srnordier bsbpb = (struct bsbpb *)(img + x1); 57037446Srnordier mk2(bsbpb->bps, bpb.bps); 57137446Srnordier mk1(bsbpb->spc, bpb.spc); 57237446Srnordier mk2(bsbpb->res, bpb.res); 57337446Srnordier mk1(bsbpb->nft, bpb.nft); 57437446Srnordier mk2(bsbpb->rde, bpb.rde); 57537446Srnordier mk2(bsbpb->sec, bpb.sec); 57637446Srnordier mk1(bsbpb->mid, bpb.mid); 57737446Srnordier mk2(bsbpb->spf, bpb.spf); 57837446Srnordier mk2(bsbpb->spt, bpb.spt); 57937446Srnordier mk2(bsbpb->hds, bpb.hds); 58037446Srnordier mk4(bsbpb->hid, bpb.hid); 58137446Srnordier mk4(bsbpb->bsec, bpb.bsec); 58237446Srnordier x1 += sizeof(struct bsbpb); 58337446Srnordier if (fat == 32) { 58437446Srnordier bsxbpb = (struct bsxbpb *)(img + x1); 58537446Srnordier mk4(bsxbpb->bspf, bpb.bspf); 58637446Srnordier mk2(bsxbpb->xflg, 0); 58737446Srnordier mk2(bsxbpb->vers, 0); 58837446Srnordier mk4(bsxbpb->rdcl, bpb.rdcl); 58937446Srnordier mk2(bsxbpb->infs, bpb.infs); 59037446Srnordier mk2(bsxbpb->bkbs, bpb.bkbs); 59137446Srnordier x1 += sizeof(struct bsxbpb); 59237446Srnordier } 59337446Srnordier bsx = (struct bsx *)(img + x1); 59437446Srnordier mk1(bsx->sig, 0x29); 59537446Srnordier if (Iflag) 59637446Srnordier x = opt_I; 59737446Srnordier else 59837446Srnordier x = (((u_int)(1 + tm->tm_mon) << 8 | 59937446Srnordier (u_int)tm->tm_mday) + 60037446Srnordier ((u_int)tm->tm_sec << 8 | 60137446Srnordier (u_int)(tv.tv_usec / 10))) << 16 | 60237446Srnordier ((u_int)(1900 + tm->tm_year) + 60337446Srnordier ((u_int)tm->tm_hour << 8 | 60437446Srnordier (u_int)tm->tm_min)); 60537446Srnordier mk4(bsx->volid, x); 60637446Srnordier mklabel(bsx->label, opt_L ? opt_L : "NO NAME"); 60737446Srnordier sprintf(buf, "FAT%u", fat); 60837446Srnordier setstr(bsx->type, buf, sizeof(bsx->type)); 60937446Srnordier if (!opt_B) { 61037446Srnordier x1 += sizeof(struct bsx); 61137446Srnordier bs = (struct bs *)img; 61237446Srnordier mk1(bs->jmp[0], 0xeb); 61337446Srnordier mk1(bs->jmp[1], x1 - 2); 61437446Srnordier mk1(bs->jmp[2], 0x90); 61537446Srnordier setstr(bs->oem, opt_O ? opt_O : "BSD 4.4", 61637446Srnordier sizeof(bs->oem)); 61737446Srnordier memcpy(img + x1, bootcode, sizeof(bootcode)); 61837446Srnordier mk2(img + bpb.bps - 2, DOSMAGIC); 61937446Srnordier } 62037446Srnordier } else if (fat == 32 && bpb.infs != MAXU16 && 62137446Srnordier (lsn == bpb.infs || 62237446Srnordier (bpb.bkbs != MAXU16 && 62337446Srnordier lsn == bpb.bkbs + bpb.infs))) { 62437446Srnordier mk4(img, 0x41615252); 62537446Srnordier mk4(img + bpb.bps - 28, 0x61417272); 62637446Srnordier mk4(img + bpb.bps - 24, 0xffffffff); 62737759Srnordier mk4(img + bpb.bps - 20, bpb.rdcl); 62837446Srnordier mk2(img + bpb.bps - 2, DOSMAGIC); 62937446Srnordier } else if (lsn >= bpb.res && lsn < dir && 63037446Srnordier !((lsn - bpb.res) % 63137446Srnordier (bpb.spf ? bpb.spf : bpb.bspf))) { 63237446Srnordier mk1(img[0], bpb.mid); 63337446Srnordier for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++) 63437446Srnordier mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff); 63537446Srnordier } else if (lsn == dir && opt_L) { 63637759Srnordier de = (struct de *)img; 63737446Srnordier mklabel(de->namext, opt_L); 63837446Srnordier mk1(de->attr, 050); 63937446Srnordier x = (u_int)tm->tm_hour << 11 | 64037446Srnordier (u_int)tm->tm_min << 5 | 64137446Srnordier (u_int)tm->tm_sec >> 1; 64237446Srnordier mk2(de->time, x); 64337446Srnordier x = (u_int)(tm->tm_year - 80) << 9 | 64437446Srnordier (u_int)(tm->tm_mon + 1) << 5 | 64537446Srnordier (u_int)tm->tm_mday; 64637446Srnordier mk2(de->date, x); 64737446Srnordier } 64837446Srnordier if ((n = write(fd, img, bpb.bps)) == -1) 64937446Srnordier err(1, "%s", fname); 65037446Srnordier if (n != bpb.bps) 65137446Srnordier errx(1, "%s: can't write sector %u", fname, lsn); 65237446Srnordier } 65337446Srnordier } 65437446Srnordier return 0; 65537446Srnordier} 65637446Srnordier 65737446Srnordier/* 65837446Srnordier * Exit with error if file system is mounted. 65937446Srnordier */ 66037446Srnordierstatic void 66137446Srnordiercheck_mounted(const char *fname, mode_t mode) 66237446Srnordier{ 66337446Srnordier struct statfs *mp; 66437446Srnordier const char *s1, *s2; 66537446Srnordier size_t len; 66637446Srnordier int n, r; 66737446Srnordier 66837446Srnordier if (!(n = getmntinfo(&mp, MNT_NOWAIT))) 66937446Srnordier err(1, "getmntinfo"); 67037446Srnordier len = strlen(_PATH_DEV); 67137446Srnordier s1 = fname; 67237446Srnordier if (!strncmp(s1, _PATH_DEV, len)) 67337446Srnordier s1 += len; 67437446Srnordier r = S_ISCHR(mode) && s1 != fname && *s1 == 'r'; 67537446Srnordier for (; n--; mp++) { 67637446Srnordier s2 = mp->f_mntfromname; 67737446Srnordier if (!strncmp(s2, _PATH_DEV, len)) 67837446Srnordier s2 += len; 67937446Srnordier if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) || 68037446Srnordier !strcmp(s1, s2)) 68137446Srnordier errx(1, "%s is mounted on %s", fname, mp->f_mntonname); 68237446Srnordier } 68337446Srnordier} 68437446Srnordier 68537446Srnordier/* 68637446Srnordier * Get a standard format. 68737446Srnordier */ 68837446Srnordierstatic void 68937446Srnordiergetstdfmt(const char *fmt, struct bpb *bpb) 69037446Srnordier{ 69137446Srnordier u_int x, i; 69237446Srnordier 69337446Srnordier x = sizeof(stdfmt) / sizeof(stdfmt[0]); 69437446Srnordier for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++); 69537446Srnordier if (i == x) 69637446Srnordier errx(1, "%s: unknown standard format", fmt); 69737446Srnordier *bpb = stdfmt[i].bpb; 69837446Srnordier} 69937446Srnordier 70037446Srnordier/* 70137446Srnordier * Get disk slice, partition, and geometry information. 70237446Srnordier */ 70337446Srnordierstatic void 70437446Srnordiergetdiskinfo(int fd, const char *fname, const char *dtype, int oflag, 70537446Srnordier struct bpb *bpb) 70637446Srnordier{ 70737446Srnordier struct diskslices ds; 70837446Srnordier struct disklabel dl, *lp; 70937446Srnordier const char *s1, *s2; 71037446Srnordier char *s; 71137446Srnordier int slice, part, fd1, i, e; 71237446Srnordier 71337446Srnordier slice = part = -1; 71437446Srnordier s1 = fname; 71537446Srnordier if ((s2 = strrchr(s1, '/'))) 71637446Srnordier s1 = s2 + 1; 71737446Srnordier for (s2 = s1; *s2 && !isdigit(*s2); s2++); 71837446Srnordier if (!*s2 || s2 == s1) 71937446Srnordier s2 = NULL; 72037446Srnordier else 72137446Srnordier while (isdigit(*++s2)); 72237446Srnordier s1 = s2; 72337446Srnordier if (s2 && *s2 == 's') { 72437759Srnordier slice = strtol(s2 + 1, &s, 10); 72537446Srnordier if (slice < 1 || slice > MAX_SLICES - BASE_SLICE) 72637446Srnordier s2 = NULL; 72737446Srnordier else { 72837446Srnordier slice = BASE_SLICE + slice - 1; 72937446Srnordier s2 = s; 73037446Srnordier } 73137446Srnordier } 73237446Srnordier if (s2 && *s2 >= 'a' && *s2 <= 'a' + MAXPARTITIONS - 1) { 73337446Srnordier if (slice == -1) 73437446Srnordier slice = COMPATIBILITY_SLICE; 73537446Srnordier part = *s2++ - 'a'; 73637446Srnordier } 73737446Srnordier if (!s2 || (*s2 && *s2 != '.')) 73837446Srnordier errx(1, "%s: can't figure out partition info", fname); 73937446Srnordier if (slice != -1 && (!oflag || (!bpb->bsec && part == -1))) { 74037446Srnordier if (ioctl(fd, DIOCGSLICEINFO, &ds) == -1) { 74137446Srnordier warn("ioctl (GSLICEINFO)"); 74237446Srnordier errx(1, "%s: can't get slice info", fname); 74337446Srnordier } 74437446Srnordier if (slice >= ds.dss_nslices || !ds.dss_slices[slice].ds_size) 74537446Srnordier errx(1, "%s: slice is unavailable", fname); 74637446Srnordier if (!oflag) 74737759Srnordier bpb->hid = ds.dss_slices[slice].ds_offset; 74837446Srnordier if (!bpb->bsec && part == -1) 74937759Srnordier bpb->bsec = ds.dss_slices[slice].ds_size; 75037446Srnordier } 75137446Srnordier if (((slice == -1 || part != -1) && 75237446Srnordier ((!oflag && part != -1) || !bpb->bsec)) || 75337446Srnordier !bpb->bps || !bpb->spt || !bpb->hds) { 75437446Srnordier lp = &dl; 75537446Srnordier i = ioctl(fd, DIOCGDINFO, lp); 75637446Srnordier if (i == -1 && slice != -1 && part == -1) { 75737446Srnordier e = errno; 75837446Srnordier if (!(s = strdup(fname))) 75937446Srnordier err(1, NULL); 76037446Srnordier s[s1 - fname] = 0; 76137446Srnordier if ((fd1 = open(s, O_RDONLY)) != -1) { 76237446Srnordier i = ioctl(fd1, DIOCGDINFO, lp); 76337446Srnordier close(fd1); 76437446Srnordier } 76537446Srnordier free(s); 76637446Srnordier errno = e; 76737446Srnordier } 76837446Srnordier if (i == -1) 76937446Srnordier if (!dtype) { 77037446Srnordier warn("ioctl (GDINFO)"); 77137446Srnordier errx(1, "%s: can't read disk label; " 77237446Srnordier "disk type must be specified", fname); 77337446Srnordier } else if (!(lp = getdiskbyname(dtype))) 77437446Srnordier errx(1, "%s: unknown disk type", dtype); 77537446Srnordier if (slice == -1 || part != -1) { 77637446Srnordier if (part == -1) 77737446Srnordier part = RAW_PART; 77837446Srnordier if (part >= lp->d_npartitions || 77937446Srnordier !lp->d_partitions[part].p_size) 78037446Srnordier errx(1, "%s: partition is unavailable", fname); 78137446Srnordier if (!oflag && part != -1) 78237446Srnordier bpb->hid += lp->d_partitions[part].p_offset; 78337446Srnordier if (!bpb->bsec) 78437446Srnordier bpb->bsec = lp->d_partitions[part].p_size; 78537446Srnordier } 78637446Srnordier if (!bpb->bps) 78737446Srnordier bpb->bps = ckgeom(fname, lp->d_secsize, "bytes/sector"); 78837446Srnordier if (!bpb->spt) 78937446Srnordier bpb->spt = ckgeom(fname, lp->d_nsectors, "sectors/track"); 79037446Srnordier if (!bpb->hds) 79137446Srnordier bpb->hds = ckgeom(fname, lp->d_ntracks, "drive heads"); 79237446Srnordier } 79337446Srnordier} 79437446Srnordier 79537446Srnordier/* 79637446Srnordier * Print out BPB values. 79737446Srnordier */ 79837446Srnordierstatic void 79937446Srnordierprint_bpb(struct bpb *bpb) 80037446Srnordier{ 80137446Srnordier printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res, 80237446Srnordier bpb->nft); 80337446Srnordier if (bpb->rde) 80437446Srnordier printf(" rde=%u", bpb->rde); 80537446Srnordier if (bpb->sec) 80637446Srnordier printf(" sec=%u", bpb->sec); 80737446Srnordier printf(" mid=0x%x", bpb->mid); 80837446Srnordier if (bpb->spf) 80937446Srnordier printf(" spf=%u", bpb->spf); 81037446Srnordier printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid); 81137446Srnordier if (bpb->bsec) 81237446Srnordier printf(" bsec=%u", bpb->bsec); 81337446Srnordier if (!bpb->spf) { 81437446Srnordier printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl); 81537446Srnordier printf(" infs="); 81637446Srnordier printf(bpb->infs == MAXU16 ? "0x%x" : "%u", bpb->infs); 81737446Srnordier printf(" bkbs="); 81837446Srnordier printf(bpb->bkbs == MAXU16 ? "0x%x" : "%u", bpb->bkbs); 81937446Srnordier } 82037446Srnordier printf("\n"); 82137446Srnordier} 82237446Srnordier 82337446Srnordier/* 82437446Srnordier * Check a disk geometry value. 82537446Srnordier */ 82637446Srnordierstatic u_int 82737446Srnordierckgeom(const char *fname, u_int val, const char *msg) 82837446Srnordier{ 82937446Srnordier if (!val) 83037446Srnordier errx(1, "%s: no default %s", fname, msg); 83137446Srnordier if (val > MAXU16) 83237446Srnordier errx(1, "%s: illegal %s", fname, msg); 83337446Srnordier return val; 83437446Srnordier} 83537446Srnordier 83637446Srnordier/* 83737446Srnordier * Convert and check a numeric option argument. 83837446Srnordier */ 83937446Srnordierstatic u_int 84037446Srnordierargtou(const char *arg, u_int lo, u_int hi, const char *msg) 84137446Srnordier{ 84237446Srnordier char *s; 84337446Srnordier u_long x; 84437446Srnordier 84537446Srnordier errno = 0; 84637446Srnordier x = strtoul(arg, &s, 0); 84737446Srnordier if (errno || !*arg || *s || x < lo || x > hi) 84837446Srnordier errx(1, "%s: bad %s", arg, msg); 84937446Srnordier return x; 85037446Srnordier} 85137446Srnordier 85237446Srnordier/* 85337446Srnordier * Check a volume label. 85437446Srnordier */ 85537446Srnordierstatic int 85637446Srnordieroklabel(const char *src) 85737446Srnordier{ 85837446Srnordier int c, i; 85937446Srnordier 86037446Srnordier for (i = 0; i <= 11; i++) { 86137446Srnordier c = (u_char)*src++; 86237446Srnordier if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) 86337446Srnordier break; 86437446Srnordier } 86537446Srnordier return i && !c; 86637446Srnordier} 86737446Srnordier 86837446Srnordier/* 86937446Srnordier * Make a volume label. 87037446Srnordier */ 87137446Srnordierstatic void 87237446Srnordiermklabel(u_int8_t *dest, const char *src) 87337446Srnordier{ 87437446Srnordier int c, i; 87537446Srnordier 87637446Srnordier for (i = 0; i < 11; i++) { 87737446Srnordier c = *src ? toupper(*src++) : ' '; 87837446Srnordier *dest++ = !i && c == '\xe5' ? 5 : c; 87937446Srnordier } 88037446Srnordier} 88137446Srnordier 88237446Srnordier/* 88337446Srnordier * Copy string, padding with spaces. 88437446Srnordier */ 88537446Srnordierstatic void 88637446Srnordiersetstr(u_int8_t *dest, const char *src, size_t len) 88737446Srnordier{ 88837446Srnordier while (len--) 88937446Srnordier *dest++ = *src ? *src++ : ' '; 89037446Srnordier} 89137446Srnordier 89237446Srnordier/* 89337446Srnordier * Print usage message. 89437446Srnordier */ 89537446Srnordierstatic void 89637446Srnordierusage(void) 89737446Srnordier{ 89837708Srnordier fprintf(stderr, 89937708Srnordier "usage: newfs_msdos [ -options ] special [disktype]\n"); 90037708Srnordier fprintf(stderr, "where the options are:\n"); 90137708Srnordier fprintf(stderr, "\t-N don't create file system: " 90237708Srnordier "just print out parameters\n"); 90337708Srnordier fprintf(stderr, "\t-B get bootstrap from file\n"); 90437708Srnordier fprintf(stderr, "\t-F FAT type (12, 16, or 32)\n"); 90537708Srnordier fprintf(stderr, "\t-I volume ID\n"); 90637708Srnordier fprintf(stderr, "\t-L volume label\n"); 90737708Srnordier fprintf(stderr, "\t-O OEM string\n"); 90837708Srnordier fprintf(stderr, "\t-S bytes/sector\n"); 90937708Srnordier fprintf(stderr, "\t-a sectors/FAT\n"); 91037708Srnordier fprintf(stderr, "\t-b block size\n"); 91137708Srnordier fprintf(stderr, "\t-c sectors/cluster\n"); 91237708Srnordier fprintf(stderr, "\t-e root directory entries\n"); 91337708Srnordier fprintf(stderr, "\t-f standard format\n"); 91437708Srnordier fprintf(stderr, "\t-h drive heads\n"); 91537708Srnordier fprintf(stderr, "\t-i file system info sector\n"); 91637708Srnordier fprintf(stderr, "\t-k backup boot sector\n"); 91737708Srnordier fprintf(stderr, "\t-m media descriptor\n"); 91837708Srnordier fprintf(stderr, "\t-n number of FATs\n"); 91937708Srnordier fprintf(stderr, "\t-o hidden sectors\n"); 92037708Srnordier fprintf(stderr, "\t-r reserved sectors\n"); 92137708Srnordier fprintf(stderr, "\t-s file system size (sectors)\n"); 92237708Srnordier fprintf(stderr, "\t-u sectors/track\n"); 92337446Srnordier exit(1); 92437446Srnordier} 925