newfs_msdos.c revision 190930
156893Sfenner/* 256893Sfenner * Copyright (c) 1998 Robert Nordier 356893Sfenner * All rights reserved. 456893Sfenner * 556893Sfenner * Redistribution and use in source and binary forms, with or without 656893Sfenner * modification, are permitted provided that the following conditions 756893Sfenner * are met: 856893Sfenner * 1. Redistributions of source code must retain the above copyright 956893Sfenner * notice, this list of conditions and the following disclaimer. 1056893Sfenner * 2. Redistributions in binary form must reproduce the above copyright 1156893Sfenner * notice, this list of conditions and the following disclaimer in 1256893Sfenner * the documentation and/or other materials provided with the 1356893Sfenner * distribution. 1456893Sfenner * 1556893Sfenner * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS 1656893Sfenner * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 1756893Sfenner * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1856893Sfenner * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY 1956893Sfenner * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2056893Sfenner * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 2175115Sfenner * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2256893Sfenner * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 2356893Sfenner * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 2456893Sfenner * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 2556893Sfenner * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26111726Sfenner */ 2756893Sfenner 2856893Sfenner#ifndef lint 2956893Sfennerstatic const char rcsid[] = 3056893Sfenner "$FreeBSD: head/sbin/newfs_msdos/newfs_msdos.c 190930 2009-04-11 14:43:22Z ed $"; 3156893Sfenner#endif /* not lint */ 3256893Sfenner 3356893Sfenner#include <sys/param.h> 3456893Sfenner#include <sys/fdcio.h> 3556893Sfenner#include <sys/disk.h> 3656893Sfenner#include <sys/disklabel.h> 3756893Sfenner#include <sys/mount.h> 3856893Sfenner#include <sys/stat.h> 3956893Sfenner#include <sys/time.h> 4056893Sfenner 41111726Sfenner#include <ctype.h> 4256893Sfenner#include <err.h> 4356893Sfenner#include <errno.h> 4456893Sfenner#include <fcntl.h> 4556893Sfenner#include <inttypes.h> 4656893Sfenner#include <paths.h> 4756893Sfenner#include <stdio.h> 4856893Sfenner#include <stdlib.h> 4956893Sfenner#include <string.h> 5056893Sfenner#include <time.h> 5156893Sfenner#include <unistd.h> 5256893Sfenner 5398524Sfenner#define MAXU16 0xffff /* maximum unsigned 16-bit quantity */ 5498524Sfenner#define BPN 4 /* bits per nibble */ 5598524Sfenner#define NPB 2 /* nibbles per byte */ 5698524Sfenner 5798524Sfenner#define DOSMAGIC 0xaa55 /* DOS magic number */ 5898524Sfenner#define MINBPS 512 /* minimum bytes per sector */ 5998524Sfenner#define MAXSPC 128 /* maximum sectors per cluster */ 6098524Sfenner#define MAXNFT 16 /* maximum number of FATs */ 6198524Sfenner#define DEFBLK 4096 /* default block size */ 6298524Sfenner#define DEFBLK16 2048 /* default block size FAT16 */ 6398524Sfenner#define DEFRDE 512 /* default root directory entries */ 6498524Sfenner#define RESFTE 2 /* reserved FAT entries */ 6598524Sfenner#define MINCLS12 1 /* minimum FAT12 clusters */ 6698524Sfenner#define MINCLS16 0x1000 /* minimum FAT16 clusters */ 6798524Sfenner#define MINCLS32 2 /* minimum FAT32 clusters */ 6898524Sfenner#define MAXCLS12 0xfed /* maximum FAT12 clusters */ 6998524Sfenner#define MAXCLS16 0xfff5 /* maximum FAT16 clusters */ 7098524Sfenner#define MAXCLS32 0xffffff5 /* maximum FAT32 clusters */ 7198524Sfenner 7298524Sfenner#define mincls(fat) ((fat) == 12 ? MINCLS12 : \ 7398524Sfenner (fat) == 16 ? MINCLS16 : \ 7498524Sfenner MINCLS32) 7598524Sfenner 7698524Sfenner#define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \ 7798524Sfenner (fat) == 16 ? MAXCLS16 : \ 7898524Sfenner MAXCLS32) 7998524Sfenner 8098524Sfenner#define mk1(p, x) \ 8198524Sfenner (p) = (u_int8_t)(x) 8298524Sfenner 8398524Sfenner#define mk2(p, x) \ 8456893Sfenner (p)[0] = (u_int8_t)(x), \ 8556893Sfenner (p)[1] = (u_int8_t)((x) >> 010) 8698524Sfenner 8798524Sfenner#define mk4(p, x) \ 8898524Sfenner (p)[0] = (u_int8_t)(x), \ 8998524Sfenner (p)[1] = (u_int8_t)((x) >> 010), \ 9098524Sfenner (p)[2] = (u_int8_t)((x) >> 020), \ 9198524Sfenner (p)[3] = (u_int8_t)((x) >> 030) 9298524Sfenner 9398524Sfenner#define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg) 9498524Sfenner#define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg) 9598524Sfenner#define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg) 9698524Sfenner#define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg) 9798524Sfenner 9898524Sfennerstruct bs { 9998524Sfenner u_int8_t jmp[3]; /* bootstrap entry point */ 10098524Sfenner u_int8_t oem[8]; /* OEM name and version */ 10198524Sfenner}; 10298524Sfenner 10398524Sfennerstruct bsbpb { 10498524Sfenner u_int8_t bps[2]; /* bytes per sector */ 10598524Sfenner u_int8_t spc; /* sectors per cluster */ 10698524Sfenner u_int8_t res[2]; /* reserved sectors */ 10798524Sfenner u_int8_t nft; /* number of FATs */ 10898524Sfenner u_int8_t rde[2]; /* root directory entries */ 10998524Sfenner u_int8_t sec[2]; /* total sectors */ 11098524Sfenner u_int8_t mid; /* media descriptor */ 11198524Sfenner u_int8_t spf[2]; /* sectors per FAT */ 11298524Sfenner u_int8_t spt[2]; /* sectors per track */ 11398524Sfenner u_int8_t hds[2]; /* drive heads */ 11498524Sfenner u_int8_t hid[4]; /* hidden sectors */ 11598524Sfenner u_int8_t bsec[4]; /* big total sectors */ 11698524Sfenner}; 11798524Sfenner 11898524Sfennerstruct bsxbpb { 11998524Sfenner u_int8_t bspf[4]; /* big sectors per FAT */ 12098524Sfenner u_int8_t xflg[2]; /* FAT control flags */ 12198524Sfenner u_int8_t vers[2]; /* file system version */ 12298524Sfenner u_int8_t rdcl[4]; /* root directory start cluster */ 12398524Sfenner u_int8_t infs[2]; /* file system info sector */ 12498524Sfenner u_int8_t bkbs[2]; /* backup boot sector */ 12598524Sfenner u_int8_t rsvd[12]; /* reserved */ 12698524Sfenner}; 12756893Sfenner 12898524Sfennerstruct bsx { 12998524Sfenner u_int8_t drv; /* drive number */ 13098524Sfenner u_int8_t rsvd; /* reserved */ 13198524Sfenner u_int8_t sig; /* extended boot signature */ 13298524Sfenner u_int8_t volid[4]; /* volume ID number */ 13398524Sfenner u_int8_t label[11]; /* volume label */ 13498524Sfenner u_int8_t type[8]; /* file system type */ 13598524Sfenner}; 13698524Sfenner 13798524Sfennerstruct de { 13898524Sfenner u_int8_t namext[11]; /* name and extension */ 13998524Sfenner u_int8_t attr; /* attributes */ 14098524Sfenner u_int8_t rsvd[10]; /* reserved */ 14198524Sfenner u_int8_t time[2]; /* creation time */ 14298524Sfenner u_int8_t date[2]; /* creation date */ 14398524Sfenner u_int8_t clus[2]; /* starting cluster */ 14498524Sfenner u_int8_t size[4]; /* size */ 14598524Sfenner}; 14698524Sfenner 14798524Sfennerstruct bpb { 14898524Sfenner u_int bps; /* bytes per sector */ 14998524Sfenner u_int spc; /* sectors per cluster */ 15098524Sfenner u_int res; /* reserved sectors */ 15198524Sfenner u_int nft; /* number of FATs */ 15298524Sfenner u_int rde; /* root directory entries */ 15398524Sfenner u_int sec; /* total sectors */ 15498524Sfenner u_int mid; /* media descriptor */ 15598524Sfenner u_int spf; /* sectors per FAT */ 15698524Sfenner u_int spt; /* sectors per track */ 15798524Sfenner u_int hds; /* drive heads */ 15898524Sfenner u_int hid; /* hidden sectors */ 15998524Sfenner u_int bsec; /* big total sectors */ 16098524Sfenner u_int bspf; /* big sectors per FAT */ 16198524Sfenner u_int rdcl; /* root directory start cluster */ 16298524Sfenner u_int infs; /* file system info sector */ 16398524Sfenner u_int bkbs; /* backup boot sector */ 16498524Sfenner}; 16598524Sfenner 16698524Sfenner#define BPBGAP 0, 0, 0, 0, 0, 0 16798524Sfenner 16898524Sfennerstatic struct { 16998524Sfenner const char *name; 17098524Sfenner struct bpb bpb; 17156893Sfenner} const stdfmt[] = { 17256893Sfenner {"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1, BPBGAP}}, 17398524Sfenner {"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1, BPBGAP}}, 17498524Sfenner {"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2, BPBGAP}}, 17598524Sfenner {"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2, BPBGAP}}, 17698524Sfenner {"640", {512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2, BPBGAP}}, 17798524Sfenner {"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2, BPBGAP}}, 17898524Sfenner {"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2, BPBGAP}}, 17998524Sfenner {"1232", {1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2, BPBGAP}}, 18098524Sfenner {"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2, BPBGAP}}, 18198524Sfenner {"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2, BPBGAP}} 18298524Sfenner}; 18398524Sfenner 18498524Sfennerstatic const u_int8_t bootcode[] = { 18598524Sfenner 0xfa, /* cli */ 18698524Sfenner 0x31, 0xc0, /* xor ax,ax */ 18798524Sfenner 0x8e, 0xd0, /* mov ss,ax */ 18898524Sfenner 0xbc, 0x00, 0x7c, /* mov sp,7c00h */ 18998524Sfenner 0xfb, /* sti */ 19098524Sfenner 0x8e, 0xd8, /* mov ds,ax */ 19198524Sfenner 0xe8, 0x00, 0x00, /* call $ + 3 */ 19298524Sfenner 0x5e, /* pop si */ 19398524Sfenner 0x83, 0xc6, 0x19, /* add si,+19h */ 19456893Sfenner 0xbb, 0x07, 0x00, /* mov bx,0007h */ 19556893Sfenner 0xfc, /* cld */ 19656893Sfenner 0xac, /* lodsb */ 19756893Sfenner 0x84, 0xc0, /* test al,al */ 19856893Sfenner 0x74, 0x06, /* jz $ + 8 */ 19956893Sfenner 0xb4, 0x0e, /* mov ah,0eh */ 20056893Sfenner 0xcd, 0x10, /* int 10h */ 20156893Sfenner 0xeb, 0xf5, /* jmp $ - 9 */ 20256893Sfenner 0x30, 0xe4, /* xor ah,ah */ 20356893Sfenner 0xcd, 0x16, /* int 16h */ 20456893Sfenner 0xcd, 0x19, /* int 19h */ 20556893Sfenner 0x0d, 0x0a, 20656893Sfenner 'N', 'o', 'n', '-', 's', 'y', 's', 't', 20756893Sfenner 'e', 'm', ' ', 'd', 'i', 's', 'k', 20856893Sfenner 0x0d, 0x0a, 20956893Sfenner 'P', 'r', 'e', 's', 's', ' ', 'a', 'n', 21056893Sfenner 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o', 21156893Sfenner ' ', 'r', 'e', 'b', 'o', 'o', 't', 21256893Sfenner 0x0d, 0x0a, 21356893Sfenner 0 21456893Sfenner}; 21556893Sfenner 21656893Sfennerstatic void check_mounted(const char *, mode_t); 21756893Sfennerstatic void getstdfmt(const char *, struct bpb *); 21856893Sfennerstatic void getdiskinfo(int, const char *, const char *, int, 21956893Sfenner struct bpb *); 22056893Sfennerstatic void print_bpb(struct bpb *); 22156893Sfennerstatic u_int ckgeom(const char *, u_int, const char *); 22256893Sfennerstatic u_int argtou(const char *, u_int, u_int, const char *); 22356893Sfennerstatic off_t argtooff(const char *, const char *); 22456893Sfennerstatic int oklabel(const char *); 22556893Sfennerstatic void mklabel(u_int8_t *, const char *); 22656893Sfennerstatic void setstr(u_int8_t *, const char *, size_t); 22756893Sfennerstatic void usage(void); 22856893Sfenner 22956893Sfenner/* 23056893Sfenner * Construct a FAT12, FAT16, or FAT32 file system. 23156893Sfenner */ 23256893Sfennerint 23356893Sfennermain(int argc, char *argv[]) 23456893Sfenner{ 23556893Sfenner static const char opts[] = "@:NB:C:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:r:s:u:"; 23656893Sfenner const char *opt_B = NULL, *opt_L = NULL, *opt_O = NULL, *opt_f = NULL; 23756893Sfenner u_int opt_F = 0, opt_I = 0, opt_S = 0, opt_a = 0, opt_b = 0, opt_c = 0; 23856893Sfenner u_int opt_e = 0, opt_h = 0, opt_i = 0, opt_k = 0, opt_m = 0, opt_n = 0; 23956893Sfenner u_int opt_o = 0, opt_r = 0, opt_s = 0, opt_u = 0; 24056893Sfenner int opt_N = 0; 24156893Sfenner int Iflag = 0, mflag = 0, oflag = 0; 24256893Sfenner char buf[MAXPATHLEN]; 24356893Sfenner struct stat sb; 24456893Sfenner struct timeval tv; 24556893Sfenner struct bpb bpb; 24656893Sfenner struct tm *tm; 24756893Sfenner struct bs *bs; 24856893Sfenner struct bsbpb *bsbpb; 24956893Sfenner struct bsxbpb *bsxbpb; 25056893Sfenner struct bsx *bsx; 25156893Sfenner struct de *de; 25256893Sfenner u_int8_t *img; 25356893Sfenner const char *fname, *dtype, *bname; 25456893Sfenner ssize_t n; 25556893Sfenner time_t now; 25656893Sfenner u_int fat, bss, rds, cls, dir, lsn, x, x1, x2; 25756893Sfenner int ch, fd, fd1; 25856893Sfenner off_t opt_create = 0, opt_ofs = 0; 25956893Sfenner 26056893Sfenner while ((ch = getopt(argc, argv, opts)) != -1) 26156893Sfenner switch (ch) { 26256893Sfenner case '@': 26356893Sfenner opt_ofs = argtooff(optarg, "offset"); 26456893Sfenner break; 26598524Sfenner case 'N': 26656893Sfenner opt_N = 1; 267111726Sfenner break; 26856893Sfenner case 'B': 26956893Sfenner opt_B = optarg; 27056893Sfenner break; 27198524Sfenner case 'C': 27256893Sfenner opt_create = argtooff(optarg, "create size"); 273111726Sfenner break; 27456893Sfenner case 'F': 27556893Sfenner if (strcmp(optarg, "12") && 27698524Sfenner strcmp(optarg, "16") && 27798524Sfenner strcmp(optarg, "32")) 27898524Sfenner errx(1, "%s: bad FAT type", optarg); 27956893Sfenner opt_F = atoi(optarg); 28098524Sfenner break; 28156893Sfenner case 'I': 28298524Sfenner opt_I = argto4(optarg, 0, "volume ID"); 28356893Sfenner Iflag = 1; 284111726Sfenner break; 285111726Sfenner case 'L': 28656893Sfenner if (!oklabel(optarg)) 28756893Sfenner errx(1, "%s: bad volume label", optarg); 28856893Sfenner opt_L = optarg; 28956893Sfenner break; 29056893Sfenner case 'O': 29198524Sfenner if (strlen(optarg) > 8) 29256893Sfenner errx(1, "%s: bad OEM string", optarg); 293111726Sfenner opt_O = optarg; 294111726Sfenner break; 295111726Sfenner case 'S': 29656893Sfenner opt_S = argto2(optarg, 1, "bytes/sector"); 297111726Sfenner break; 29898524Sfenner case 'a': 29998524Sfenner opt_a = argto4(optarg, 1, "sectors/FAT"); 30098524Sfenner break; 30156893Sfenner case 'b': 30256893Sfenner opt_b = argtox(optarg, 1, "block size"); 30356893Sfenner opt_c = 0; 30498524Sfenner break; 30556893Sfenner case 'c': 306111726Sfenner opt_c = argto1(optarg, 1, "sectors/cluster"); 307111726Sfenner opt_b = 0; 30856893Sfenner break; 30956893Sfenner case 'e': 31056893Sfenner opt_e = argto2(optarg, 1, "directory entries"); 31198524Sfenner break; 31256893Sfenner case 'f': 31398524Sfenner opt_f = optarg; 31456893Sfenner break; 315111726Sfenner case 'h': 31656893Sfenner opt_h = argto2(optarg, 1, "drive heads"); 31756893Sfenner break; 318111726Sfenner case 'i': 31956893Sfenner opt_i = argto2(optarg, 1, "info sector"); 32056893Sfenner break; 32156893Sfenner case 'k': 32256893Sfenner opt_k = argto2(optarg, 1, "backup sector"); 32356893Sfenner break; 32498524Sfenner case 'm': 32556893Sfenner opt_m = argto1(optarg, 0, "media descriptor"); 32698524Sfenner mflag = 1; 32756893Sfenner break; 328111726Sfenner case 'n': 32956893Sfenner opt_n = argto1(optarg, 1, "number of FATs"); 33056893Sfenner break; 331111726Sfenner case 'o': 33256893Sfenner opt_o = argto4(optarg, 0, "hidden sectors"); 33356893Sfenner oflag = 1; 33456893Sfenner break; 33556893Sfenner case 'r': 33656893Sfenner opt_r = argto2(optarg, 1, "reserved sectors"); 33756893Sfenner break; 33856893Sfenner case 's': 33998524Sfenner opt_s = argto4(optarg, 1, "file system size"); 34056893Sfenner break; 34156893Sfenner case 'u': 34256893Sfenner opt_u = argto2(optarg, 1, "sectors/track"); 34356893Sfenner break; 34456893Sfenner default: 34556893Sfenner usage(); 34656893Sfenner } 34756893Sfenner argc -= optind; 34898524Sfenner argv += optind; 34956893Sfenner if (argc < 1 || argc > 2) 35098524Sfenner usage(); 35156893Sfenner fname = *argv++; 352111726Sfenner if (!strchr(fname, '/')) { 35356893Sfenner snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname); 35456893Sfenner if (!(fname = strdup(buf))) 355111726Sfenner err(1, NULL); 35656893Sfenner } 35756893Sfenner dtype = *argv; 35856893Sfenner if (opt_create) { 35956893Sfenner if (opt_N) 36056893Sfenner errx(1, "create (-C) is incompatible with -N"); 36198524Sfenner fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644); 36256893Sfenner if (fd == -1) 36398524Sfenner errx(1, "failed to create %s", fname); 36456893Sfenner if (ftruncate(fd, opt_create)) 365111726Sfenner errx(1, "failed to initialize %jd bytes", (intmax_t)opt_create); 36656893Sfenner } else if ((fd = open(fname, opt_N ? O_RDONLY : O_RDWR)) == -1) 36756893Sfenner err(1, "%s", fname); 368111726Sfenner if (fstat(fd, &sb)) 36956893Sfenner err(1, "%s", fname); 37056893Sfenner if (!opt_N) 37156893Sfenner check_mounted(fname, sb.st_mode); 37256893Sfenner if (!S_ISCHR(sb.st_mode)) 37356893Sfenner warnx("warning, %s is not a character device", fname); 37498524Sfenner if (opt_ofs && opt_ofs != lseek(fd, opt_ofs, SEEK_SET)) 37556893Sfenner errx(1, "cannot seek to %jd", (intmax_t)opt_ofs); 37656893Sfenner memset(&bpb, 0, sizeof(bpb)); 37756893Sfenner if (opt_f) { 37856893Sfenner getstdfmt(opt_f, &bpb); 37956893Sfenner bpb.bsec = bpb.sec; 38098524Sfenner bpb.sec = 0; 38156893Sfenner bpb.bspf = bpb.spf; 38298524Sfenner bpb.spf = 0; 38356893Sfenner } 38498524Sfenner if (opt_h) 385111726Sfenner bpb.hds = opt_h; 38656893Sfenner if (opt_u) 38756893Sfenner bpb.spt = opt_u; 38856893Sfenner if (opt_S) 38998524Sfenner bpb.bps = opt_S; 39056893Sfenner if (opt_s) 39198524Sfenner bpb.bsec = opt_s; 39256893Sfenner if (oflag) 393111726Sfenner bpb.hid = opt_o; 39456893Sfenner if (!(opt_f || (opt_h && opt_u && opt_S && opt_s && oflag))) { 39556893Sfenner off_t delta; 39656893Sfenner getdiskinfo(fd, fname, dtype, oflag, &bpb); 39798524Sfenner bpb.bsec -= (opt_ofs / bpb.bps); 39856893Sfenner delta = bpb.bsec % bpb.spt; 39998524Sfenner if (delta != 0) { 40098524Sfenner warnx("trim %d sectors to adjust to a multiple of %d", 40198524Sfenner (int)delta, bpb.spt); 40298524Sfenner bpb.bsec -= delta; 40356893Sfenner } 404111726Sfenner if (bpb.spc == 0) { /* set defaults */ 405111726Sfenner if (bpb.bsec <= 6000) /* about 3MB -> 512 bytes */ 40698524Sfenner bpb.spc = 1; 40756893Sfenner else if (bpb.bsec <= (1<<17)) /* 64M -> 4k */ 408111726Sfenner bpb.spc = 8; 409111726Sfenner else if (bpb.bsec <= (1<<19)) /* 256M -> 8k */ 41098524Sfenner bpb.spc = 16; 41156893Sfenner else if (bpb.bsec <= (1<<21)) /* 1G -> 16k */ 412111726Sfenner bpb.spc = 32; 413111726Sfenner else 41498524Sfenner bpb.spc = 64; /* otherwise 32k */ 41556893Sfenner } 416111726Sfenner } 417111726Sfenner if (!powerof2(bpb.bps)) 41898524Sfenner errx(1, "bytes/sector (%u) is not a power of 2", bpb.bps); 41956893Sfenner if (bpb.bps < MINBPS) 420111726Sfenner errx(1, "bytes/sector (%u) is too small; minimum is %u", 421111726Sfenner bpb.bps, MINBPS); 42298524Sfenner if (!(fat = opt_F)) { 42356893Sfenner if (opt_f) 424111726Sfenner fat = 12; 425111726Sfenner else if (!opt_e && (opt_i || opt_k)) 42698524Sfenner fat = 32; 42756893Sfenner } 42856893Sfenner if ((fat == 32 && opt_e) || (fat != 32 && (opt_i || opt_k))) 42956893Sfenner errx(1, "-%c is not a legal FAT%s option", 43098524Sfenner fat == 32 ? 'e' : opt_i ? 'i' : 'k', 43156893Sfenner fat == 32 ? "32" : "12/16"); 43298524Sfenner if (opt_f && fat == 32) 43398524Sfenner bpb.rde = 0; 43456893Sfenner if (opt_b) { 43598524Sfenner if (!powerof2(opt_b)) 43656893Sfenner errx(1, "block size (%u) is not a power of 2", opt_b); 437111726Sfenner if (opt_b < bpb.bps) 438111726Sfenner errx(1, "block size (%u) is too small; minimum is %u", 43998524Sfenner opt_b, bpb.bps); 44098524Sfenner if (opt_b > bpb.bps * MAXSPC) 441111726Sfenner errx(1, "block size (%u) is too large; maximum is %u", 442111726Sfenner opt_b, bpb.bps * MAXSPC); 44398524Sfenner bpb.spc = opt_b / bpb.bps; 44456893Sfenner } 44556893Sfenner if (opt_c) { 44656893Sfenner if (!powerof2(opt_c)) 44798524Sfenner errx(1, "sectors/cluster (%u) is not a power of 2", opt_c); 44856893Sfenner bpb.spc = opt_c; 44998524Sfenner } 45098524Sfenner if (opt_r) 451111726Sfenner bpb.res = opt_r; 452111726Sfenner if (opt_n) { 45398524Sfenner if (opt_n > MAXNFT) 45498524Sfenner errx(1, "number of FATs (%u) is too large; maximum is %u", 45556893Sfenner opt_n, MAXNFT); 45698524Sfenner bpb.nft = opt_n; 45798524Sfenner } 45898524Sfenner if (opt_e) 45998524Sfenner bpb.rde = opt_e; 46056893Sfenner if (mflag) { 46156893Sfenner if (opt_m < 0xf0) 46256893Sfenner errx(1, "illegal media descriptor (%#x)", opt_m); 46398524Sfenner bpb.mid = opt_m; 46456893Sfenner } 46598524Sfenner if (opt_a) 46698524Sfenner bpb.bspf = opt_a; 46798524Sfenner if (opt_i) 46898524Sfenner bpb.infs = opt_i; 46956893Sfenner if (opt_k) 47098524Sfenner bpb.bkbs = opt_k; 47198524Sfenner bss = 1; 47298524Sfenner bname = NULL; 47356893Sfenner fd1 = -1; 47498524Sfenner if (opt_B) { 47556893Sfenner bname = opt_B; 47698524Sfenner if (!strchr(bname, '/')) { 477111726Sfenner snprintf(buf, sizeof(buf), "/boot/%s", bname); 47856893Sfenner if (!(bname = strdup(buf))) 479124486Sfenner err(1, NULL); 480124486Sfenner } 481124486Sfenner if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) 482124486Sfenner err(1, "%s", bname); 483124486Sfenner if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bps || 484124486Sfenner sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU16) 485124486Sfenner errx(1, "%s: inappropriate file type or format", bname); 486124486Sfenner bss = sb.st_size / bpb.bps; 487124486Sfenner } 488124486Sfenner if (!bpb.nft) 489124486Sfenner bpb.nft = 2; 49098524Sfenner if (!fat) { 49198524Sfenner if (bpb.bsec < (bpb.res ? bpb.res : bss) + 49256893Sfenner howmany((RESFTE + (bpb.spc ? MINCLS16 : MAXCLS12 + 1)) * 493111726Sfenner ((bpb.spc ? 16 : 12) / BPN), bpb.bps * NPB) * 49498524Sfenner bpb.nft + 49598524Sfenner howmany(bpb.rde ? bpb.rde : DEFRDE, 496111726Sfenner bpb.bps / sizeof(struct de)) + 49798524Sfenner (bpb.spc ? MINCLS16 : MAXCLS12 + 1) * 49898524Sfenner (bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps))) 49998524Sfenner fat = 12; 50098524Sfenner else if (bpb.rde || bpb.bsec < 50156893Sfenner (bpb.res ? bpb.res : bss) + 502111726Sfenner howmany((RESFTE + MAXCLS16) * 2, bpb.bps) * bpb.nft + 50398524Sfenner howmany(DEFRDE, bpb.bps / sizeof(struct de)) + 504111726Sfenner (MAXCLS16 + 1) * 505111726Sfenner (bpb.spc ? bpb.spc : howmany(8192, bpb.bps))) 50698524Sfenner fat = 16; 50798524Sfenner else 50898524Sfenner fat = 32; 50998524Sfenner } 51098524Sfenner x = bss; 51156893Sfenner if (fat == 32) { 512111726Sfenner if (!bpb.infs) { 51398524Sfenner if (x == MAXU16 || x == bpb.bkbs) 51498524Sfenner errx(1, "no room for info sector"); 51598524Sfenner bpb.infs = x; 51698524Sfenner } 51775115Sfenner if (bpb.infs != MAXU16 && x <= bpb.infs) 51898524Sfenner x = bpb.infs + 1; 51998524Sfenner if (!bpb.bkbs) { 52098524Sfenner if (x == MAXU16) 52198524Sfenner errx(1, "no room for backup sector"); 52298524Sfenner bpb.bkbs = x; 52398524Sfenner } else if (bpb.bkbs != MAXU16 && bpb.bkbs == bpb.infs) 52498524Sfenner errx(1, "backup sector would overwrite info sector"); 52598524Sfenner if (bpb.bkbs != MAXU16 && x <= bpb.bkbs) 52698524Sfenner x = bpb.bkbs + 1; 52798524Sfenner } 52898524Sfenner if (!bpb.res) 52998524Sfenner bpb.res = fat == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x; 53098524Sfenner else if (bpb.res < x) 53198524Sfenner errx(1, "too few reserved sectors"); 53298524Sfenner if (fat != 32 && !bpb.rde) 53398524Sfenner bpb.rde = DEFRDE; 53498524Sfenner rds = howmany(bpb.rde, bpb.bps / sizeof(struct de)); 53598524Sfenner if (!bpb.spc) 53698524Sfenner for (bpb.spc = howmany(fat == 16 ? DEFBLK16 : DEFBLK, bpb.bps); 53798524Sfenner bpb.spc < MAXSPC && 53898524Sfenner bpb.res + 53998524Sfenner howmany((RESFTE + maxcls(fat)) * (fat / BPN), 54098524Sfenner bpb.bps * NPB) * bpb.nft + 54198524Sfenner rds + 54298524Sfenner (u_int64_t)(maxcls(fat) + 1) * bpb.spc <= bpb.bsec; 54398524Sfenner bpb.spc <<= 1); 54498524Sfenner if (fat != 32 && bpb.bspf > MAXU16) 54598524Sfenner errx(1, "too many sectors/FAT for FAT12/16"); 54698524Sfenner x1 = bpb.res + rds; 54798524Sfenner x = bpb.bspf ? bpb.bspf : 1; 54898524Sfenner if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) 54998524Sfenner errx(1, "meta data exceeds file system size"); 55098524Sfenner x1 += x * bpb.nft; 55198524Sfenner x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB / 55298524Sfenner (bpb.spc * bpb.bps * NPB + fat / BPN * bpb.nft); 55398524Sfenner x2 = howmany((RESFTE + MIN(x, maxcls(fat))) * (fat / BPN), 55498524Sfenner bpb.bps * NPB); 55598524Sfenner if (!bpb.bspf) { 55698524Sfenner bpb.bspf = x2; 55798524Sfenner x1 += (bpb.bspf - 1) * bpb.nft; 55898524Sfenner } 55998524Sfenner cls = (bpb.bsec - x1) / bpb.spc; 56098524Sfenner x = (u_int64_t)bpb.bspf * bpb.bps * NPB / (fat / BPN) - RESFTE; 56198524Sfenner if (cls > x) 56298524Sfenner cls = x; 56398524Sfenner if (bpb.bspf < x2) 56498524Sfenner warnx("warning: sectors/FAT limits file system to %u clusters", 56598524Sfenner cls); 56698524Sfenner if (cls < mincls(fat)) 56798524Sfenner errx(1, "%u clusters too few clusters for FAT%u, need %u", cls, fat, 56898524Sfenner mincls(fat)); 56998524Sfenner if (cls > maxcls(fat)) { 57098524Sfenner cls = maxcls(fat); 57198524Sfenner bpb.bsec = x1 + (cls + 1) * bpb.spc - 1; 57298524Sfenner warnx("warning: FAT type limits file system to %u sectors", 57398524Sfenner bpb.bsec); 57498524Sfenner } 57598524Sfenner printf("%s: %u sector%s in %u FAT%u cluster%s " 57698524Sfenner "(%u bytes/cluster)\n", fname, cls * bpb.spc, 57798524Sfenner cls * bpb.spc == 1 ? "" : "s", cls, fat, 57898524Sfenner cls == 1 ? "" : "s", bpb.bps * bpb.spc); 57998524Sfenner if (!bpb.mid) 58098524Sfenner bpb.mid = !bpb.hid ? 0xf0 : 0xf8; 58198524Sfenner if (fat == 32) 58298524Sfenner bpb.rdcl = RESFTE; 58398524Sfenner if (bpb.hid + bpb.bsec <= MAXU16) { 58498524Sfenner bpb.sec = bpb.bsec; 58598524Sfenner bpb.bsec = 0; 58698524Sfenner } 58798524Sfenner if (fat != 32) { 58898524Sfenner bpb.spf = bpb.bspf; 58998524Sfenner bpb.bspf = 0; 59098524Sfenner } 59198524Sfenner print_bpb(&bpb); 59298524Sfenner if (!opt_N) { 59398524Sfenner gettimeofday(&tv, NULL); 59498524Sfenner now = tv.tv_sec; 59598524Sfenner tm = localtime(&now); 59698524Sfenner if (!(img = malloc(bpb.bps))) 59798524Sfenner err(1, NULL); 59898524Sfenner dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft; 59998524Sfenner for (lsn = 0; lsn < dir + (fat == 32 ? bpb.spc : rds); lsn++) { 60098524Sfenner x = lsn; 60198524Sfenner if (opt_B && 60298524Sfenner fat == 32 && bpb.bkbs != MAXU16 && 60356893Sfenner bss <= bpb.bkbs && x >= bpb.bkbs) { 60456893Sfenner x -= bpb.bkbs; 60598524Sfenner if (!x && lseek(fd1, opt_ofs, SEEK_SET)) 60698524Sfenner err(1, "%s", bname); 60756893Sfenner } 60898524Sfenner if (opt_B && x < bss) { 60998524Sfenner if ((n = read(fd1, img, bpb.bps)) == -1) 61098524Sfenner err(1, "%s", bname); 61198524Sfenner if ((unsigned)n != bpb.bps) 61298524Sfenner errx(1, "%s: can't read sector %u", bname, x); 61356893Sfenner } else 61456893Sfenner memset(img, 0, bpb.bps); 61556893Sfenner if (!lsn || 61656893Sfenner (fat == 32 && bpb.bkbs != MAXU16 && lsn == bpb.bkbs)) { 61756893Sfenner x1 = sizeof(struct bs); 61856893Sfenner bsbpb = (struct bsbpb *)(img + x1); 61998524Sfenner mk2(bsbpb->bps, bpb.bps); 62056893Sfenner mk1(bsbpb->spc, bpb.spc); 62198524Sfenner mk2(bsbpb->res, bpb.res); 62256893Sfenner mk1(bsbpb->nft, bpb.nft); 62398524Sfenner mk2(bsbpb->rde, bpb.rde); 62456893Sfenner mk2(bsbpb->sec, bpb.sec); 62556893Sfenner mk1(bsbpb->mid, bpb.mid); 62656893Sfenner mk2(bsbpb->spf, bpb.spf); 62798524Sfenner mk2(bsbpb->spt, bpb.spt); 628111726Sfenner mk2(bsbpb->hds, bpb.hds); 62956893Sfenner mk4(bsbpb->hid, bpb.hid); 630111726Sfenner mk4(bsbpb->bsec, bpb.bsec); 63156893Sfenner x1 += sizeof(struct bsbpb); 63256893Sfenner if (fat == 32) { 63356893Sfenner bsxbpb = (struct bsxbpb *)(img + x1); 63456893Sfenner mk4(bsxbpb->bspf, bpb.bspf); 63556893Sfenner mk2(bsxbpb->xflg, 0); 63656893Sfenner mk2(bsxbpb->vers, 0); 63756893Sfenner mk4(bsxbpb->rdcl, bpb.rdcl); 63856893Sfenner mk2(bsxbpb->infs, bpb.infs); 639111726Sfenner mk2(bsxbpb->bkbs, bpb.bkbs); 64056893Sfenner x1 += sizeof(struct bsxbpb); 64156893Sfenner } 64256893Sfenner bsx = (struct bsx *)(img + x1); 643111726Sfenner mk1(bsx->sig, 0x29); 64456893Sfenner if (Iflag) 64556893Sfenner x = opt_I; 64656893Sfenner else 647111726Sfenner x = (((u_int)(1 + tm->tm_mon) << 8 | 64856893Sfenner (u_int)tm->tm_mday) + 64956893Sfenner ((u_int)tm->tm_sec << 8 | 65056893Sfenner (u_int)(tv.tv_usec / 10))) << 16 | 651111726Sfenner ((u_int)(1900 + tm->tm_year) + 65256893Sfenner ((u_int)tm->tm_hour << 8 | 65356893Sfenner (u_int)tm->tm_min)); 65456893Sfenner mk4(bsx->volid, x); 655111726Sfenner mklabel(bsx->label, opt_L ? opt_L : "NO NAME"); 65656893Sfenner sprintf(buf, "FAT%u", fat); 65756893Sfenner setstr(bsx->type, buf, sizeof(bsx->type)); 65856893Sfenner if (!opt_B) { 65956893Sfenner x1 += sizeof(struct bsx); 66056893Sfenner bs = (struct bs *)img; 66156893Sfenner mk1(bs->jmp[0], 0xeb); 66256893Sfenner mk1(bs->jmp[1], x1 - 2); 66356893Sfenner mk1(bs->jmp[2], 0x90); 66456893Sfenner setstr(bs->oem, opt_O ? opt_O : "BSD 4.4", 66598524Sfenner sizeof(bs->oem)); 666111726Sfenner memcpy(img + x1, bootcode, sizeof(bootcode)); 66756893Sfenner mk2(img + MINBPS - 2, DOSMAGIC); 66856893Sfenner } 66956893Sfenner } else if (fat == 32 && bpb.infs != MAXU16 && 67056893Sfenner (lsn == bpb.infs || 67156893Sfenner (bpb.bkbs != MAXU16 && 67298524Sfenner lsn == bpb.bkbs + bpb.infs))) { 673111726Sfenner mk4(img, 0x41615252); 67498524Sfenner mk4(img + MINBPS - 28, 0x61417272); 67598524Sfenner mk4(img + MINBPS - 24, 0xffffffff); 676111726Sfenner mk4(img + MINBPS - 20, bpb.rdcl); 67798524Sfenner mk2(img + MINBPS - 2, DOSMAGIC); 67856893Sfenner } else if (lsn >= bpb.res && lsn < dir && 67956893Sfenner !((lsn - bpb.res) % 68098524Sfenner (bpb.spf ? bpb.spf : bpb.bspf))) { 681111726Sfenner mk1(img[0], bpb.mid); 68298524Sfenner for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++) 68398524Sfenner mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff); 684111726Sfenner } else if (lsn == dir && opt_L) { 68598524Sfenner de = (struct de *)img; 68656893Sfenner mklabel(de->namext, opt_L); 68756893Sfenner mk1(de->attr, 050); 68856893Sfenner x = (u_int)tm->tm_hour << 11 | 68998524Sfenner (u_int)tm->tm_min << 5 | 690111726Sfenner (u_int)tm->tm_sec >> 1; 69156893Sfenner mk2(de->time, x); 69256893Sfenner x = (u_int)(tm->tm_year - 80) << 9 | 69356893Sfenner (u_int)(tm->tm_mon + 1) << 5 | 69456893Sfenner (u_int)tm->tm_mday; 69556893Sfenner mk2(de->date, x); 69656893Sfenner } 69756893Sfenner if ((n = write(fd, img, bpb.bps)) == -1) 69856893Sfenner err(1, "%s", fname); 69956893Sfenner if ((unsigned)n != bpb.bps) 70056893Sfenner errx(1, "%s: can't write sector %u", fname, lsn); 70156893Sfenner } 70256893Sfenner } 70375115Sfenner return 0; 70456893Sfenner} 70556893Sfenner 70698524Sfenner/* 70798524Sfenner * Exit with error if file system is mounted. 70898524Sfenner */ 70998524Sfennerstatic void 71098524Sfennercheck_mounted(const char *fname, mode_t mode) 71156893Sfenner{ 712 struct statfs *mp; 713 const char *s1, *s2; 714 size_t len; 715 int n, r; 716 717 if (!(n = getmntinfo(&mp, MNT_NOWAIT))) 718 err(1, "getmntinfo"); 719 len = strlen(_PATH_DEV); 720 s1 = fname; 721 if (!strncmp(s1, _PATH_DEV, len)) 722 s1 += len; 723 r = S_ISCHR(mode) && s1 != fname && *s1 == 'r'; 724 for (; n--; mp++) { 725 s2 = mp->f_mntfromname; 726 if (!strncmp(s2, _PATH_DEV, len)) 727 s2 += len; 728 if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) || 729 !strcmp(s1, s2)) 730 errx(1, "%s is mounted on %s", fname, mp->f_mntonname); 731 } 732} 733 734/* 735 * Get a standard format. 736 */ 737static void 738getstdfmt(const char *fmt, struct bpb *bpb) 739{ 740 u_int x, i; 741 742 x = sizeof(stdfmt) / sizeof(stdfmt[0]); 743 for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++); 744 if (i == x) 745 errx(1, "%s: unknown standard format", fmt); 746 *bpb = stdfmt[i].bpb; 747} 748 749/* 750 * Get disk slice, partition, and geometry information. 751 */ 752static void 753getdiskinfo(int fd, const char *fname, const char *dtype, __unused int oflag, 754 struct bpb *bpb) 755{ 756 struct disklabel *lp, dlp; 757 struct fd_type type; 758 off_t ms, hs = 0; 759 760 lp = NULL; 761 762 /* If the user specified a disk type, try to use that */ 763 if (dtype != NULL) { 764 lp = getdiskbyname(dtype); 765 } 766 767 /* Maybe it's a floppy drive */ 768 if (lp == NULL) { 769 if (ioctl(fd, DIOCGMEDIASIZE, &ms) == -1) { 770 struct stat st; 771 772 if (fstat(fd, &st)) 773 err(1, "Cannot get disk size"); 774 /* create a fake geometry for a file image */ 775 ms = st.st_size; 776 dlp.d_secsize = 512; 777 dlp.d_nsectors = 63; 778 dlp.d_ntracks = 255; 779 dlp.d_secperunit = ms / dlp.d_secsize; 780 lp = &dlp; 781 } else if (ioctl(fd, FD_GTYPE, &type) != -1) { 782 dlp.d_secsize = 128 << type.secsize; 783 dlp.d_nsectors = type.sectrac; 784 dlp.d_ntracks = type.heads; 785 dlp.d_secperunit = ms / dlp.d_secsize; 786 lp = &dlp; 787 } 788 } 789 790 /* Maybe it's a fixed drive */ 791 if (lp == NULL) { 792 if (ioctl(fd, DIOCGDINFO, &dlp) == -1) { 793 if (bpb->bps == 0 && ioctl(fd, DIOCGSECTORSIZE, &dlp.d_secsize) == -1) 794 errx(1, "Cannot get sector size, %s", strerror(errno)); 795 796 /* XXX Should we use bpb->bps if it's set? */ 797 dlp.d_secperunit = ms / dlp.d_secsize; 798 799 if (bpb->spt == 0 && ioctl(fd, DIOCGFWSECTORS, &dlp.d_nsectors) == -1) { 800 warnx("Cannot get number of sectors per track, %s", strerror(errno)); 801 dlp.d_nsectors = 63; 802 } 803 if (bpb->hds == 0 && ioctl(fd, DIOCGFWHEADS, &dlp.d_ntracks) == -1) { 804 warnx("Cannot get number of heads, %s", strerror(errno)); 805 if (dlp.d_secperunit <= 63*1*1024) 806 dlp.d_ntracks = 1; 807 else if (dlp.d_secperunit <= 63*16*1024) 808 dlp.d_ntracks = 16; 809 else 810 dlp.d_ntracks = 255; 811 } 812 } 813 814 hs = (ms / dlp.d_secsize) - dlp.d_secperunit; 815 lp = &dlp; 816 } 817 818 if (bpb->bps == 0) 819 bpb->bps = ckgeom(fname, lp->d_secsize, "bytes/sector"); 820 if (bpb->spt == 0) 821 bpb->spt = ckgeom(fname, lp->d_nsectors, "sectors/track"); 822 if (bpb->hds == 0) 823 bpb->hds = ckgeom(fname, lp->d_ntracks, "drive heads"); 824 if (bpb->bsec == 0) 825 bpb->bsec = lp->d_secperunit; 826 if (bpb->hid == 0) 827 bpb->hid = hs; 828} 829 830/* 831 * Print out BPB values. 832 */ 833static void 834print_bpb(struct bpb *bpb) 835{ 836 printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res, 837 bpb->nft); 838 if (bpb->rde) 839 printf(" rde=%u", bpb->rde); 840 if (bpb->sec) 841 printf(" sec=%u", bpb->sec); 842 printf(" mid=%#x", bpb->mid); 843 if (bpb->spf) 844 printf(" spf=%u", bpb->spf); 845 printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid); 846 if (bpb->bsec) 847 printf(" bsec=%u", bpb->bsec); 848 if (!bpb->spf) { 849 printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl); 850 printf(" infs="); 851 printf(bpb->infs == MAXU16 ? "%#x" : "%u", bpb->infs); 852 printf(" bkbs="); 853 printf(bpb->bkbs == MAXU16 ? "%#x" : "%u", bpb->bkbs); 854 } 855 printf("\n"); 856} 857 858/* 859 * Check a disk geometry value. 860 */ 861static u_int 862ckgeom(const char *fname, u_int val, const char *msg) 863{ 864 if (!val) 865 errx(1, "%s: no default %s", fname, msg); 866 if (val > MAXU16) 867 errx(1, "%s: illegal %s %d", fname, msg, val); 868 return val; 869} 870 871/* 872 * Convert and check a numeric option argument. 873 */ 874static u_int 875argtou(const char *arg, u_int lo, u_int hi, const char *msg) 876{ 877 char *s; 878 u_long x; 879 880 errno = 0; 881 x = strtoul(arg, &s, 0); 882 if (errno || !*arg || *s || x < lo || x > hi) 883 errx(1, "%s: bad %s", arg, msg); 884 return x; 885} 886 887/* 888 * Same for off_t, with optional skmgpP suffix 889 */ 890static off_t 891argtooff(const char *arg, const char *msg) 892{ 893 char *s; 894 off_t x; 895 896 x = strtoll(arg, &s, 0); 897 /* allow at most one extra char */ 898 if (errno || x < 0 || (s[0] && s[1]) ) 899 errx(1, "%s: bad %s", arg, msg); 900 if (*s) { /* the extra char is the multiplier */ 901 switch (*s) { 902 default: 903 errx(1, "%s: bad %s", arg, msg); 904 /* notreached */ 905 906 case 's': /* sector */ 907 case 'S': 908 x <<= 9; /* times 512 */ 909 break; 910 911 case 'k': /* kilobyte */ 912 case 'K': 913 x <<= 10; /* times 1024 */ 914 break; 915 916 case 'm': /* megabyte */ 917 case 'M': 918 x <<= 20; /* times 1024*1024 */ 919 break; 920 921 case 'g': /* gigabyte */ 922 case 'G': 923 x <<= 30; /* times 1024*1024*1024 */ 924 break; 925 926 case 'p': /* partition start */ 927 case 'P': /* partition start */ 928 case 'l': /* partition length */ 929 case 'L': /* partition length */ 930 errx(1, "%s: not supported yet %s", arg, msg); 931 /* notreached */ 932 } 933 } 934 return x; 935} 936 937/* 938 * Check a volume label. 939 */ 940static int 941oklabel(const char *src) 942{ 943 int c, i; 944 945 for (i = 0; i <= 11; i++) { 946 c = (u_char)*src++; 947 if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) 948 break; 949 } 950 return i && !c; 951} 952 953/* 954 * Make a volume label. 955 */ 956static void 957mklabel(u_int8_t *dest, const char *src) 958{ 959 int c, i; 960 961 for (i = 0; i < 11; i++) { 962 c = *src ? toupper(*src++) : ' '; 963 *dest++ = !i && c == '\xe5' ? 5 : c; 964 } 965} 966 967/* 968 * Copy string, padding with spaces. 969 */ 970static void 971setstr(u_int8_t *dest, const char *src, size_t len) 972{ 973 while (len--) 974 *dest++ = *src ? *src++ : ' '; 975} 976 977/* 978 * Print usage message. 979 */ 980static void 981usage(void) 982{ 983 fprintf(stderr, 984 "usage: newfs_msdos [ -options ] special [disktype]\n" 985 "where the options are:\n" 986 "\t-@ create file system at specified offset\n" 987 "\t-B get bootstrap from file\n" 988 "\t-C create image file with specified size\n" 989 "\t-F FAT type (12, 16, or 32)\n" 990 "\t-I volume ID\n" 991 "\t-L volume label\n" 992 "\t-N don't create file system: just print out parameters\n" 993 "\t-O OEM string\n" 994 "\t-S bytes/sector\n" 995 "\t-a sectors/FAT\n" 996 "\t-b block size\n" 997 "\t-c sectors/cluster\n" 998 "\t-e root directory entries\n" 999 "\t-f standard format\n" 1000 "\t-h drive heads\n" 1001 "\t-i file system info sector\n" 1002 "\t-k backup boot sector\n" 1003 "\t-m media descriptor\n" 1004 "\t-n number of FATs\n" 1005 "\t-o hidden sectors\n" 1006 "\t-r reserved sectors\n" 1007 "\t-s file system size (sectors)\n" 1008 "\t-u sectors/track\n"); 1009 exit(1); 1010} 1011