newfs_msdos.c revision 231162
16059Samurai/* 26059Samurai * Copyright (c) 1998 Robert Nordier 36059Samurai * All rights reserved. 46059Samurai * 56059Samurai * Redistribution and use in source and binary forms, with or without 66059Samurai * modification, are permitted provided that the following conditions 76059Samurai * are met: 86059Samurai * 1. Redistributions of source code must retain the above copyright 96059Samurai * notice, this list of conditions and the following disclaimer. 106059Samurai * 2. Redistributions in binary form must reproduce the above copyright 116059Samurai * notice, this list of conditions and the following disclaimer in 126059Samurai * the documentation and/or other materials provided with the 136059Samurai * distribution. 146059Samurai * 156059Samurai * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS 166059Samurai * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 176059Samurai * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 186059Samurai * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY 198857Srgrimes * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2050479Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 218857Srgrimes * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 226059Samurai * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 236059Samurai * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 2443313Sbrian * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 2530715Sbrian * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2636285Sbrian */ 2736285Sbrian 2836285Sbrian#ifndef lint 2930715Sbrianstatic const char rcsid[] = 3043888Sbrian "$FreeBSD: stable/9/sbin/newfs_msdos/newfs_msdos.c 231162 2012-02-07 21:56:58Z delphij $"; 3143888Sbrian#endif /* not lint */ 3237192Sbrian 3336287Sbrian#include <sys/param.h> 3437192Sbrian#include <sys/fdcio.h> 3530715Sbrian#include <sys/disk.h> 3643888Sbrian#include <sys/disklabel.h> 3743888Sbrian#include <sys/mount.h> 3849976Sbrian#include <sys/stat.h> 3930715Sbrian#include <sys/time.h> 4044106Sbrian 4143888Sbrian#include <ctype.h> 4236285Sbrian#include <err.h> 4343888Sbrian#include <errno.h> 4429840Sbrian#include <fcntl.h> 4546686Sbrian#include <inttypes.h> 4630715Sbrian#include <paths.h> 4730715Sbrian#include <signal.h> 4830715Sbrian#include <stdio.h> 4930715Sbrian#include <stdlib.h> 506059Samurai#include <string.h> 5146686Sbrian#include <time.h> 526059Samurai#include <unistd.h> 5336285Sbrian 546059Samurai#define MAXU16 0xffff /* maximum unsigned 16-bit quantity */ 556735Samurai#define BPN 4 /* bits per nibble */ 5636285Sbrian#define NPB 2 /* nibbles per byte */ 5736285Sbrian 5836285Sbrian#define DOSMAGIC 0xaa55 /* DOS magic number */ 5943888Sbrian#define MINBPS 512 /* minimum bytes per sector */ 6036285Sbrian#define MAXSPC 128 /* maximum sectors per cluster */ 6136285Sbrian#define MAXNFT 16 /* maximum number of FATs */ 6236285Sbrian#define DEFBLK 4096 /* default block size */ 6336285Sbrian#define DEFBLK16 2048 /* default block size FAT16 */ 6436285Sbrian#define DEFRDE 512 /* default root directory entries */ 6536285Sbrian#define RESFTE 2 /* reserved FAT entries */ 6636285Sbrian#define MINCLS12 1U /* minimum FAT12 clusters */ 6736285Sbrian#define MINCLS16 0x1000U /* minimum FAT16 clusters */ 6843313Sbrian#define MINCLS32 2U /* minimum FAT32 clusters */ 6943313Sbrian#define MAXCLS12 0xfedU /* maximum FAT12 clusters */ 7043313Sbrian#define MAXCLS16 0xfff5U /* maximum FAT16 clusters */ 7136285Sbrian#define MAXCLS32 0xffffff5U /* maximum FAT32 clusters */ 7236285Sbrian 7338174Sbrian#define mincls(fat) ((fat) == 12 ? MINCLS12 : \ 7443888Sbrian (fat) == 16 ? MINCLS16 : \ 7536285Sbrian MINCLS32) 7637192Sbrian 7736287Sbrian#define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \ 7837192Sbrian (fat) == 16 ? MAXCLS16 : \ 796059Samurai MAXCLS32) 8031343Sbrian 8119866Sphk#define mk1(p, x) \ 826059Samurai (p) = (u_int8_t)(x) 8343693Sbrian 846059Samurai#define mk2(p, x) \ 8530715Sbrian (p)[0] = (u_int8_t)(x), \ 8636285Sbrian (p)[1] = (u_int8_t)((x) >> 010) 8743693Sbrian 886059Samurai#define mk4(p, x) \ 896059Samurai (p)[0] = (u_int8_t)(x), \ 906059Samurai (p)[1] = (u_int8_t)((x) >> 010), \ 916059Samurai (p)[2] = (u_int8_t)((x) >> 020), \ 926059Samurai (p)[3] = (u_int8_t)((x) >> 030) 9328679Sbrian 946059Samurai#define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg) 956059Samurai#define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg) 966059Samurai#define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg) 9754912Sbrian#define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg) 9830715Sbrian 996059Samuraistruct bs { 10030715Sbrian u_int8_t bsJump[3]; /* bootstrap entry point */ 10136285Sbrian u_int8_t bsOemName[8]; /* OEM name and version */ 10237926Sbrian} __packed; 10337926Sbrian 10437926Sbrianstruct bsbpb { 10537926Sbrian u_int8_t bpbBytesPerSec[2]; /* bytes per sector */ 10646686Sbrian u_int8_t bpbSecPerClust; /* sectors per cluster */ 10750867Sbrian u_int8_t bpbResSectors[2]; /* reserved sectors */ 1086059Samurai u_int8_t bpbFATs; /* number of FATs */ 1096059Samurai u_int8_t bpbRootDirEnts[2]; /* root directory entries */ 11043693Sbrian u_int8_t bpbSectors[2]; /* total sectors */ 11144123Sbrian u_int8_t bpbMedia; /* media descriptor */ 11244123Sbrian u_int8_t bpbFATsecs[2]; /* sectors per FAT */ 11344123Sbrian u_int8_t bpbSecPerTrack[2]; /* sectors per track */ 11444123Sbrian u_int8_t bpbHeads[2]; /* drive heads */ 11544123Sbrian u_int8_t bpbHiddenSecs[4]; /* hidden sectors */ 1166059Samurai u_int8_t bpbHugeSectors[4]; /* big total sectors */ 11743693Sbrian} __packed; 11843693Sbrian 11943693Sbrianstruct bsxbpb { 12043693Sbrian u_int8_t bpbBigFATsecs[4]; /* big sectors per FAT */ 12143693Sbrian u_int8_t bpbExtFlags[2]; /* FAT control flags */ 12243693Sbrian u_int8_t bpbFSVers[2]; /* file system version */ 12343693Sbrian u_int8_t bpbRootClust[4]; /* root directory start cluster */ 12444106Sbrian u_int8_t bpbFSInfo[2]; /* file system info sector */ 12543693Sbrian u_int8_t bpbBackup[2]; /* backup boot sector */ 12643693Sbrian u_int8_t bpbReserved[12]; /* reserved */ 12743693Sbrian} __packed; 12843693Sbrian 12943693Sbrianstruct bsx { 13043693Sbrian u_int8_t exDriveNumber; /* drive number */ 13143693Sbrian u_int8_t exReserved1; /* reserved */ 13244106Sbrian u_int8_t exBootSignature; /* extended boot signature */ 13344106Sbrian u_int8_t exVolumeID[4]; /* volume ID number */ 13444106Sbrian u_int8_t exVolumeLabel[11]; /* volume label */ 13544106Sbrian u_int8_t exFileSysType[8]; /* file system type */ 13644106Sbrian} __packed; 13744106Sbrian 13844106Sbrianstruct de { 13944106Sbrian u_int8_t deName[11]; /* name and extension */ 14044106Sbrian u_int8_t deAttributes; /* attributes */ 14143693Sbrian u_int8_t rsvd[10]; /* reserved */ 14244106Sbrian u_int8_t deMTime[2]; /* creation time */ 14344106Sbrian u_int8_t deMDate[2]; /* creation date */ 14444106Sbrian u_int8_t deStartCluster[2]; /* starting cluster */ 14544106Sbrian u_int8_t deFileSize[4]; /* size */ 14644106Sbrian} __packed; 14744106Sbrian 14844106Sbrianstruct bpb { 14944106Sbrian u_int bpbBytesPerSec; /* bytes per sector */ 15044106Sbrian u_int bpbSecPerClust; /* sectors per cluster */ 15144106Sbrian u_int bpbResSectors; /* reserved sectors */ 15244106Sbrian u_int bpbFATs; /* number of FATs */ 15344106Sbrian u_int bpbRootDirEnts; /* root directory entries */ 15444106Sbrian u_int bpbSectors; /* total sectors */ 15544106Sbrian u_int bpbMedia; /* media descriptor */ 15644106Sbrian u_int bpbFATsecs; /* sectors per FAT */ 15744106Sbrian u_int bpbSecPerTrack; /* sectors per track */ 15844106Sbrian u_int bpbHeads; /* drive heads */ 15944106Sbrian u_int bpbHiddenSecs; /* hidden sectors */ 16044106Sbrian u_int bpbHugeSectors; /* big total sectors */ 16143693Sbrian u_int bpbBigFATsecs; /* big sectors per FAT */ 16243693Sbrian u_int bpbRootClust; /* root directory start cluster */ 16344106Sbrian u_int bpbFSInfo; /* file system info sector */ 16444106Sbrian u_int bpbBackup; /* backup boot sector */ 16544106Sbrian}; 16644106Sbrian 16744106Sbrian#define BPBGAP 0, 0, 0, 0, 0, 0 16843693Sbrian 16943693Sbrianstatic struct { 17043693Sbrian const char *name; 17143693Sbrian struct bpb bpb; 17243693Sbrian} const stdfmt[] = { 17343693Sbrian {"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1, BPBGAP}}, 17443693Sbrian {"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1, BPBGAP}}, 17543693Sbrian {"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2, BPBGAP}}, 17643693Sbrian {"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2, BPBGAP}}, 17743693Sbrian {"640", {512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2, BPBGAP}}, 17843693Sbrian {"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2, BPBGAP}}, 17943693Sbrian {"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2, BPBGAP}}, 18043693Sbrian {"1232", {1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2, BPBGAP}}, 18143693Sbrian {"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2, BPBGAP}}, 18243693Sbrian {"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2, BPBGAP}} 18343693Sbrian}; 18443693Sbrian 18543693Sbrianstatic const u_int8_t bootcode[] = { 18643693Sbrian 0xfa, /* cli */ 18743693Sbrian 0x31, 0xc0, /* xor ax,ax */ 18843693Sbrian 0x8e, 0xd0, /* mov ss,ax */ 18943693Sbrian 0xbc, 0x00, 0x7c, /* mov sp,7c00h */ 19043693Sbrian 0xfb, /* sti */ 19143693Sbrian 0x8e, 0xd8, /* mov ds,ax */ 19243693Sbrian 0xe8, 0x00, 0x00, /* call $ + 3 */ 19343693Sbrian 0x5e, /* pop si */ 19443693Sbrian 0x83, 0xc6, 0x19, /* add si,+19h */ 19543693Sbrian 0xbb, 0x07, 0x00, /* mov bx,0007h */ 19643888Sbrian 0xfc, /* cld */ 19743888Sbrian 0xac, /* lodsb */ 19843888Sbrian 0x84, 0xc0, /* test al,al */ 19943888Sbrian 0x74, 0x06, /* jz $ + 8 */ 20043888Sbrian 0xb4, 0x0e, /* mov ah,0eh */ 20147849Sbrian 0xcd, 0x10, /* int 10h */ 20243888Sbrian 0xeb, 0xf5, /* jmp $ - 9 */ 20343888Sbrian 0x30, 0xe4, /* xor ah,ah */ 20443888Sbrian 0xcd, 0x16, /* int 16h */ 20543888Sbrian 0xcd, 0x19, /* int 19h */ 20643888Sbrian 0x0d, 0x0a, 20743888Sbrian 'N', 'o', 'n', '-', 's', 'y', 's', 't', 20843888Sbrian 'e', 'm', ' ', 'd', 'i', 's', 'k', 20943888Sbrian 0x0d, 0x0a, 21043888Sbrian 'P', 'r', 'e', 's', 's', ' ', 'a', 'n', 21143888Sbrian 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o', 21243888Sbrian ' ', 'r', 'e', 'b', 'o', 'o', 't', 21343888Sbrian 0x0d, 0x0a, 21443888Sbrian 0 21543888Sbrian}; 21643888Sbrian 21743888Sbrianstatic volatile sig_atomic_t got_siginfo; 21843888Sbrianstatic void infohandler(int); 21943888Sbrian 22047849Sbrianstatic void check_mounted(const char *, mode_t); 22143888Sbrianstatic void getstdfmt(const char *, struct bpb *); 22243888Sbrianstatic void getdiskinfo(int, const char *, const char *, int, 22343888Sbrian struct bpb *); 22443888Sbrianstatic void print_bpb(struct bpb *); 22543888Sbrianstatic u_int ckgeom(const char *, u_int, const char *); 22643888Sbrianstatic u_int argtou(const char *, u_int, u_int, const char *); 22743888Sbrianstatic off_t argtooff(const char *, const char *); 22843888Sbrianstatic int oklabel(const char *); 22943888Sbrianstatic void mklabel(u_int8_t *, const char *); 23043888Sbrianstatic void setstr(u_int8_t *, const char *, size_t); 23143888Sbrianstatic void usage(void); 23243888Sbrian 23343888Sbrian/* 23443888Sbrian * Construct a FAT12, FAT16, or FAT32 file system. 23549976Sbrian */ 23649976Sbrianint 23743888Sbrianmain(int argc, char *argv[]) 23843888Sbrian{ 23949976Sbrian 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:"; 24049976Sbrian const char *opt_B = NULL, *opt_L = NULL, *opt_O = NULL, *opt_f = NULL; 24143888Sbrian u_int opt_F = 0, opt_I = 0, opt_S = 0, opt_a = 0, opt_b = 0, opt_c = 0; 24243888Sbrian u_int opt_e = 0, opt_h = 0, opt_i = 0, opt_k = 0, opt_m = 0, opt_n = 0; 24343888Sbrian u_int opt_o = 0, opt_r = 0, opt_s = 0, opt_u = 0; 24443888Sbrian int opt_N = 0; 24549976Sbrian int Iflag = 0, mflag = 0, oflag = 0; 24649976Sbrian char buf[MAXPATHLEN]; 24743888Sbrian struct sigaction si_sa; 24843888Sbrian struct stat sb; 24943888Sbrian struct timeval tv; 25047849Sbrian struct bpb bpb; 25143888Sbrian struct tm *tm; 25249976Sbrian struct bs *bs; 25349976Sbrian struct bsbpb *bsbpb; 25443888Sbrian struct bsxbpb *bsxbpb; 25543888Sbrian struct bsx *bsx; 25643888Sbrian struct de *de; 25743888Sbrian u_int8_t *img; 25843888Sbrian const char *fname, *dtype, *bname; 25943888Sbrian ssize_t n; 26043888Sbrian time_t now; 26143888Sbrian u_int fat, bss, rds, cls, dir, lsn, x, x1, x2; 26245907Sbrian int ch, fd, fd1; 26343888Sbrian off_t opt_create = 0, opt_ofs = 0; 26443888Sbrian 26543888Sbrian while ((ch = getopt(argc, argv, opts)) != -1) 26643888Sbrian switch (ch) { 26743888Sbrian case '@': 26843888Sbrian opt_ofs = argtooff(optarg, "offset"); 26943888Sbrian break; 27043888Sbrian case 'N': 27143888Sbrian opt_N = 1; 27243888Sbrian break; 27343888Sbrian case 'B': 27443888Sbrian opt_B = optarg; 27543888Sbrian break; 27643888Sbrian case 'C': 27743888Sbrian opt_create = argtooff(optarg, "create size"); 27843888Sbrian break; 27943888Sbrian case 'F': 28043888Sbrian if (strcmp(optarg, "12") && 28143888Sbrian strcmp(optarg, "16") && 28243888Sbrian strcmp(optarg, "32")) 28343888Sbrian errx(1, "%s: bad FAT type", optarg); 28443888Sbrian opt_F = atoi(optarg); 28543888Sbrian break; 28643888Sbrian case 'I': 28743888Sbrian opt_I = argto4(optarg, 0, "volume ID"); 28843888Sbrian Iflag = 1; 28943888Sbrian break; 29043888Sbrian case 'L': 29145907Sbrian if (!oklabel(optarg)) 29244123Sbrian errx(1, "%s: bad volume label", optarg); 29344106Sbrian opt_L = optarg; 29444123Sbrian break; 29543888Sbrian case 'O': 29643888Sbrian if (strlen(optarg) > 8) 29743888Sbrian errx(1, "%s: bad OEM string", optarg); 29844123Sbrian opt_O = optarg; 29944123Sbrian break; 30044123Sbrian case 'S': 30144123Sbrian opt_S = argto2(optarg, 1, "bytes/sector"); 30244123Sbrian break; 30343888Sbrian case 'a': 30444106Sbrian opt_a = argto4(optarg, 1, "sectors/FAT"); 30543888Sbrian break; 30645907Sbrian case 'b': 30744123Sbrian opt_b = argtox(optarg, 1, "block size"); 30844123Sbrian opt_c = 0; 30944123Sbrian break; 31044123Sbrian case 'c': 31143888Sbrian opt_c = argto1(optarg, 1, "sectors/cluster"); 31243888Sbrian opt_b = 0; 31343888Sbrian break; 31443888Sbrian case 'e': 31544123Sbrian opt_e = argto2(optarg, 1, "directory entries"); 31644106Sbrian break; 31744123Sbrian case 'f': 31843888Sbrian opt_f = optarg; 31943888Sbrian break; 32043888Sbrian case 'h': 32143888Sbrian opt_h = argto2(optarg, 1, "drive heads"); 32243888Sbrian break; 32343888Sbrian case 'i': 32443888Sbrian opt_i = argto2(optarg, 1, "info sector"); 32543888Sbrian break; 32643888Sbrian case 'k': 32743888Sbrian opt_k = argto2(optarg, 1, "backup sector"); 32843888Sbrian break; 32943888Sbrian case 'm': 33043888Sbrian opt_m = argto1(optarg, 0, "media descriptor"); 33143888Sbrian mflag = 1; 33243888Sbrian break; 33343888Sbrian case 'n': 33443888Sbrian opt_n = argto1(optarg, 1, "number of FATs"); 33543888Sbrian break; 33643888Sbrian case 'o': 33743888Sbrian opt_o = argto4(optarg, 0, "hidden sectors"); 33843888Sbrian oflag = 1; 33943888Sbrian break; 34043888Sbrian case 'r': 34143888Sbrian opt_r = argto2(optarg, 1, "reserved sectors"); 34243888Sbrian break; 34343888Sbrian case 's': 34443888Sbrian opt_s = argto4(optarg, 1, "file system size"); 34543888Sbrian break; 34643888Sbrian case 'u': 34743888Sbrian opt_u = argto2(optarg, 1, "sectors/track"); 34843888Sbrian break; 34943888Sbrian default: 35043888Sbrian usage(); 35143888Sbrian } 35243888Sbrian argc -= optind; 35343888Sbrian argv += optind; 35443888Sbrian if (argc < 1 || argc > 2) 35543888Sbrian usage(); 35643888Sbrian fname = *argv++; 35743888Sbrian if (!opt_create && !strchr(fname, '/')) { 35843888Sbrian snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname); 35943888Sbrian if (!(fname = strdup(buf))) 36043888Sbrian err(1, NULL); 36143888Sbrian } 36243888Sbrian dtype = *argv; 36343888Sbrian if (opt_create) { 36443888Sbrian if (opt_N) 36543888Sbrian errx(1, "create (-C) is incompatible with -N"); 36643888Sbrian fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644); 36743888Sbrian if (fd == -1) 36843888Sbrian errx(1, "failed to create %s", fname); 36943888Sbrian if (ftruncate(fd, opt_create)) 37043888Sbrian errx(1, "failed to initialize %jd bytes", (intmax_t)opt_create); 37143888Sbrian } else if ((fd = open(fname, opt_N ? O_RDONLY : O_RDWR)) == -1) 37243888Sbrian err(1, "%s", fname); 37343888Sbrian if (fstat(fd, &sb)) 37443888Sbrian err(1, "%s", fname); 37543888Sbrian if (opt_create) { 37643888Sbrian if (!S_ISREG(sb.st_mode)) 37743888Sbrian warnx("warning, %s is not a regular file", fname); 37843888Sbrian } else { 37943888Sbrian if (!S_ISCHR(sb.st_mode)) 38044123Sbrian warnx("warning, %s is not a character device", fname); 38144106Sbrian } 38244106Sbrian if (!opt_N) 38344106Sbrian check_mounted(fname, sb.st_mode); 38444106Sbrian if (opt_ofs && opt_ofs != lseek(fd, opt_ofs, SEEK_SET)) 38544123Sbrian errx(1, "cannot seek to %jd", (intmax_t)opt_ofs); 38644106Sbrian memset(&bpb, 0, sizeof(bpb)); 38743888Sbrian if (opt_f) { 38843888Sbrian getstdfmt(opt_f, &bpb); 38943888Sbrian bpb.bpbHugeSectors = bpb.bpbSectors; 39043888Sbrian bpb.bpbSectors = 0; 39143888Sbrian bpb.bpbBigFATsecs = bpb.bpbFATsecs; 39243888Sbrian bpb.bpbFATsecs = 0; 39343888Sbrian } 39444123Sbrian if (opt_h) 39544123Sbrian bpb.bpbHeads = opt_h; 39644123Sbrian if (opt_u) 39744123Sbrian bpb.bpbSecPerTrack = opt_u; 39844123Sbrian if (opt_S) 39943888Sbrian bpb.bpbBytesPerSec = opt_S; 40043888Sbrian if (opt_s) 40143888Sbrian bpb.bpbHugeSectors = opt_s; 40243888Sbrian if (oflag) 40343888Sbrian bpb.bpbHiddenSecs = opt_o; 40443888Sbrian if (!(opt_f || (opt_h && opt_u && opt_S && opt_s && oflag))) { 40543888Sbrian off_t delta; 40643888Sbrian getdiskinfo(fd, fname, dtype, oflag, &bpb); 40743888Sbrian bpb.bpbHugeSectors -= (opt_ofs / bpb.bpbBytesPerSec); 40843888Sbrian delta = bpb.bpbHugeSectors % bpb.bpbSecPerTrack; 40943888Sbrian if (delta != 0) { 41043888Sbrian warnx("trim %d sectors to adjust to a multiple of %d", 41143888Sbrian (int)delta, bpb.bpbSecPerTrack); 41243888Sbrian bpb.bpbHugeSectors -= delta; 41343693Sbrian } 41443693Sbrian if (bpb.bpbSecPerClust == 0) { /* set defaults */ 41543693Sbrian if (bpb.bpbHugeSectors <= 6000) /* about 3MB -> 512 bytes */ 41613379Sphk bpb.bpbSecPerClust = 1; 4176059Samurai else if (bpb.bpbHugeSectors <= (1<<17)) /* 64M -> 4k */ 4186059Samurai bpb.bpbSecPerClust = 8; 41943888Sbrian else if (bpb.bpbHugeSectors <= (1<<19)) /* 256M -> 8k */ 42043401Sbrian bpb.bpbSecPerClust = 16; 42145907Sbrian else if (bpb.bpbHugeSectors <= (1<<21)) /* 1G -> 16k */ 42243888Sbrian bpb.bpbSecPerClust = 32; 42345907Sbrian else 42443888Sbrian bpb.bpbSecPerClust = 64; /* otherwise 32k */ 42543313Sbrian } 42643888Sbrian } 42743888Sbrian if (!powerof2(bpb.bpbBytesPerSec)) 42843888Sbrian errx(1, "bytes/sector (%u) is not a power of 2", bpb.bpbBytesPerSec); 42943888Sbrian if (bpb.bpbBytesPerSec < MINBPS) 43043888Sbrian errx(1, "bytes/sector (%u) is too small; minimum is %u", 43143888Sbrian bpb.bpbBytesPerSec, MINBPS); 43243313Sbrian if (!(fat = opt_F)) { 43343888Sbrian if (opt_f) 43444106Sbrian fat = 12; 43544106Sbrian else if (!opt_e && (opt_i || opt_k)) 43644106Sbrian fat = 32; 43744106Sbrian } 43844106Sbrian if ((fat == 32 && opt_e) || (fat != 32 && (opt_i || opt_k))) 43944106Sbrian errx(1, "-%c is not a legal FAT%s option", 44045907Sbrian fat == 32 ? 'e' : opt_i ? 'i' : 'k', 44143888Sbrian fat == 32 ? "32" : "12/16"); 44243888Sbrian if (opt_f && fat == 32) 44343888Sbrian bpb.bpbRootDirEnts = 0; 44443313Sbrian if (opt_b) { 44545907Sbrian if (!powerof2(opt_b)) 44645907Sbrian errx(1, "block size (%u) is not a power of 2", opt_b); 4476059Samurai if (opt_b < bpb.bpbBytesPerSec) 4486059Samurai errx(1, "block size (%u) is too small; minimum is %u", 44930715Sbrian opt_b, bpb.bpbBytesPerSec); 45043693Sbrian if (opt_b > bpb.bpbBytesPerSec * MAXSPC) 4516059Samurai errx(1, "block size (%u) is too large; maximum is %u", 45243693Sbrian opt_b, bpb.bpbBytesPerSec * MAXSPC); 45343693Sbrian bpb.bpbSecPerClust = opt_b / bpb.bpbBytesPerSec; 45443693Sbrian } 45543693Sbrian if (opt_c) { 45643693Sbrian if (!powerof2(opt_c)) 4576059Samurai errx(1, "sectors/cluster (%u) is not a power of 2", opt_c); 45843693Sbrian bpb.bpbSecPerClust = opt_c; 45943693Sbrian } 46043693Sbrian if (opt_r) 46143693Sbrian bpb.bpbResSectors = opt_r; 46243693Sbrian if (opt_n) { 46343693Sbrian if (opt_n > MAXNFT) 46443693Sbrian errx(1, "number of FATs (%u) is too large; maximum is %u", 4656059Samurai opt_n, MAXNFT); 46643693Sbrian bpb.bpbFATs = opt_n; 46743693Sbrian } 46843693Sbrian if (opt_e) 46943693Sbrian bpb.bpbRootDirEnts = opt_e; 47043693Sbrian if (mflag) { 47143693Sbrian if (opt_m < 0xf0) 47237926Sbrian errx(1, "illegal media descriptor (%#x)", opt_m); 47344106Sbrian bpb.bpbMedia = opt_m; 47444123Sbrian } 47544123Sbrian if (opt_a) 47644123Sbrian bpb.bpbBigFATsecs = opt_a; 47744123Sbrian if (opt_i) 47844123Sbrian bpb.bpbFSInfo = opt_i; 47944106Sbrian if (opt_k) 48044106Sbrian bpb.bpbBackup = opt_k; 48144106Sbrian bss = 1; 48244123Sbrian bname = NULL; 48344106Sbrian fd1 = -1; 48444106Sbrian if (opt_B) { 48544106Sbrian bname = opt_B; 48644106Sbrian if (!strchr(bname, '/')) { 48744106Sbrian snprintf(buf, sizeof(buf), "/boot/%s", bname); 48844123Sbrian if (!(bname = strdup(buf))) 48944123Sbrian err(1, NULL); 49044123Sbrian } 49144106Sbrian if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) 49244106Sbrian err(1, "%s", bname); 49344106Sbrian if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bpbBytesPerSec || 49444106Sbrian sb.st_size < bpb.bpbBytesPerSec || 49544106Sbrian sb.st_size > bpb.bpbBytesPerSec * MAXU16) 49644123Sbrian errx(1, "%s: inappropriate file type or format", bname); 49744106Sbrian bss = sb.st_size / bpb.bpbBytesPerSec; 49844106Sbrian } 49944106Sbrian if (!bpb.bpbFATs) 50044106Sbrian bpb.bpbFATs = 2; 50144106Sbrian if (!fat) { 50245907Sbrian if (bpb.bpbHugeSectors < (bpb.bpbResSectors ? bpb.bpbResSectors : bss) + 50344106Sbrian howmany((RESFTE + (bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1)) * 50444106Sbrian (bpb.bpbSecPerClust ? 16 : 12) / BPN, 50544106Sbrian bpb.bpbBytesPerSec * NPB) * 50644106Sbrian bpb.bpbFATs + 50744106Sbrian howmany(bpb.bpbRootDirEnts ? bpb.bpbRootDirEnts : DEFRDE, 50844106Sbrian bpb.bpbBytesPerSec / sizeof(struct de)) + 50944123Sbrian (bpb.bpbSecPerClust ? MINCLS16 : MAXCLS12 + 1) * 51044106Sbrian (bpb.bpbSecPerClust ? bpb.bpbSecPerClust : 51143693Sbrian howmany(DEFBLK, bpb.bpbBytesPerSec))) 51243693Sbrian fat = 12; 51343693Sbrian else if (bpb.bpbRootDirEnts || bpb.bpbHugeSectors < 51443888Sbrian (bpb.bpbResSectors ? bpb.bpbResSectors : bss) + 51543888Sbrian howmany((RESFTE + MAXCLS16) * 2, bpb.bpbBytesPerSec) * 51643888Sbrian bpb.bpbFATs + 51743888Sbrian howmany(DEFRDE, bpb.bpbBytesPerSec / sizeof(struct de)) + 51843888Sbrian (MAXCLS16 + 1) * 51943888Sbrian (bpb.bpbSecPerClust ? bpb.bpbSecPerClust : 52043888Sbrian howmany(8192, bpb.bpbBytesPerSec))) 52143693Sbrian fat = 16; 52245907Sbrian else 52344123Sbrian fat = 32; 52444106Sbrian } 52544106Sbrian x = bss; 52644123Sbrian if (fat == 32) { 52743693Sbrian if (!bpb.bpbFSInfo) { 52829840Sbrian if (x == MAXU16 || x == bpb.bpbBackup) 52943693Sbrian errx(1, "no room for info sector"); 53043888Sbrian bpb.bpbFSInfo = x; 53143888Sbrian } 53243888Sbrian if (bpb.bpbFSInfo != MAXU16 && x <= bpb.bpbFSInfo) 53343888Sbrian x = bpb.bpbFSInfo + 1; 53443888Sbrian if (!bpb.bpbBackup) { 53546686Sbrian if (x == MAXU16) 53646686Sbrian errx(1, "no room for backup sector"); 53743693Sbrian bpb.bpbBackup = x; 53846686Sbrian } else if (bpb.bpbBackup != MAXU16 && bpb.bpbBackup == bpb.bpbFSInfo) 53943693Sbrian errx(1, "backup sector would overwrite info sector"); 54044106Sbrian if (bpb.bpbBackup != MAXU16 && x <= bpb.bpbBackup) 54144123Sbrian x = bpb.bpbBackup + 1; 54248817Sbrian } 54344123Sbrian if (!bpb.bpbResSectors) 54444123Sbrian bpb.bpbResSectors = fat == 32 ? 54544123Sbrian MAX(x, MAX(16384 / bpb.bpbBytesPerSec, 4)) : x; 54629840Sbrian else if (bpb.bpbResSectors < x) 54746686Sbrian errx(1, "too few reserved sectors (need %d have %d)", x, 54846686Sbrian bpb.bpbResSectors); 54954912Sbrian if (fat != 32 && !bpb.bpbRootDirEnts) 55046686Sbrian bpb.bpbRootDirEnts = DEFRDE; 55146686Sbrian rds = howmany(bpb.bpbRootDirEnts, bpb.bpbBytesPerSec / sizeof(struct de)); 55246686Sbrian if (!bpb.bpbSecPerClust) 55346686Sbrian for (bpb.bpbSecPerClust = howmany(fat == 16 ? DEFBLK16 : 55446686Sbrian DEFBLK, bpb.bpbBytesPerSec); 55545220Sbrian bpb.bpbSecPerClust < MAXSPC && 55654912Sbrian bpb.bpbResSectors + 55746686Sbrian howmany((RESFTE + maxcls(fat)) * (fat / BPN), 55845220Sbrian bpb.bpbBytesPerSec * NPB) * 55945220Sbrian bpb.bpbFATs + 56054912Sbrian rds + 56144159Sbrian (u_int64_t) (maxcls(fat) + 1) * 56244159Sbrian bpb.bpbSecPerClust <= bpb.bpbHugeSectors; 56344159Sbrian bpb.bpbSecPerClust <<= 1) 56443693Sbrian continue; 56543693Sbrian if (fat != 32 && bpb.bpbBigFATsecs > MAXU16) 56643693Sbrian errx(1, "too many sectors/FAT for FAT12/16"); 56743693Sbrian x1 = bpb.bpbResSectors + rds; 56854912Sbrian x = bpb.bpbBigFATsecs ? bpb.bpbBigFATsecs : 1; 56943693Sbrian if (x1 + (u_int64_t)x * bpb.bpbFATs > bpb.bpbHugeSectors) 57043693Sbrian errx(1, "meta data exceeds file system size"); 57143693Sbrian x1 += x * bpb.bpbFATs; 57243693Sbrian x = (u_int64_t)(bpb.bpbHugeSectors - x1) * bpb.bpbBytesPerSec * NPB / 57346686Sbrian (bpb.bpbSecPerClust * bpb.bpbBytesPerSec * NPB + fat / 57443693Sbrian BPN * bpb.bpbFATs); 57543693Sbrian x2 = howmany((RESFTE + MIN(x, maxcls(fat))) * (fat / BPN), 57643693Sbrian bpb.bpbBytesPerSec * NPB); 57743693Sbrian if (!bpb.bpbBigFATsecs) { 57854912Sbrian bpb.bpbBigFATsecs = x2; 57946686Sbrian x1 += (bpb.bpbBigFATsecs - 1) * bpb.bpbFATs; 58025630Sbrian } 58143693Sbrian cls = (bpb.bpbHugeSectors - x1) / bpb.bpbSecPerClust; 58229840Sbrian x = (u_int64_t)bpb.bpbBigFATsecs * bpb.bpbBytesPerSec * NPB / (fat / BPN) - 58344123Sbrian RESFTE; 58444106Sbrian if (cls > x) 58544123Sbrian cls = x; 58643693Sbrian if (bpb.bpbBigFATsecs < x2) 58743693Sbrian warnx("warning: sectors/FAT limits file system to %u clusters", 58844106Sbrian cls); 58944106Sbrian if (cls < mincls(fat)) 59043693Sbrian errx(1, "%u clusters too few clusters for FAT%u, need %u", cls, fat, 59143693Sbrian mincls(fat)); 59254912Sbrian if (cls > maxcls(fat)) { 59346686Sbrian cls = maxcls(fat); 59443693Sbrian bpb.bpbHugeSectors = x1 + (cls + 1) * bpb.bpbSecPerClust - 1; 59545907Sbrian warnx("warning: FAT type limits file system to %u sectors", 59645907Sbrian bpb.bpbHugeSectors); 59743693Sbrian } 59844123Sbrian printf("%s: %u sector%s in %u FAT%u cluster%s " 59944106Sbrian "(%u bytes/cluster)\n", fname, cls * bpb.bpbSecPerClust, 60044106Sbrian cls * bpb.bpbSecPerClust == 1 ? "" : "s", cls, fat, 60144106Sbrian cls == 1 ? "" : "s", bpb.bpbBytesPerSec * bpb.bpbSecPerClust); 60244123Sbrian if (!bpb.bpbMedia) 60343693Sbrian bpb.bpbMedia = !bpb.bpbHiddenSecs ? 0xf0 : 0xf8; 60443313Sbrian if (fat == 32) 60543693Sbrian bpb.bpbRootClust = RESFTE; 60643693Sbrian if (bpb.bpbHiddenSecs + bpb.bpbHugeSectors <= MAXU16) { 60743693Sbrian bpb.bpbSectors = bpb.bpbHugeSectors; 60843693Sbrian bpb.bpbHugeSectors = 0; 60943693Sbrian } 61043693Sbrian if (fat != 32) { 61154912Sbrian bpb.bpbFATsecs = bpb.bpbBigFATsecs; 61246686Sbrian bpb.bpbBigFATsecs = 0; 61343693Sbrian } 61443693Sbrian print_bpb(&bpb); 61543693Sbrian if (!opt_N) { 61654912Sbrian gettimeofday(&tv, NULL); 61746686Sbrian now = tv.tv_sec; 61843693Sbrian tm = localtime(&now); 61943693Sbrian if (!(img = malloc(bpb.bpbBytesPerSec))) 62043693Sbrian err(1, NULL); 62143693Sbrian dir = bpb.bpbResSectors + (bpb.bpbFATsecs ? bpb.bpbFATsecs : 62243693Sbrian bpb.bpbBigFATsecs) * bpb.bpbFATs; 62344123Sbrian memset(&si_sa, 0, sizeof(si_sa)); 62444106Sbrian si_sa.sa_handler = infohandler; 62544123Sbrian if (sigaction(SIGINFO, &si_sa, NULL) == -1) 62643693Sbrian err(1, "sigaction SIGINFO"); 62743313Sbrian for (lsn = 0; lsn < dir + (fat == 32 ? bpb.bpbSecPerClust : rds); lsn++) { 62843693Sbrian if (got_siginfo) { 62943693Sbrian fprintf(stderr,"%s: writing sector %u of %u (%u%%)\n", 63043693Sbrian fname, lsn, 63143693Sbrian (dir + (fat == 32 ? bpb.bpbSecPerClust: rds)), 63243693Sbrian (lsn * 100) / (dir + 63354912Sbrian (fat == 32 ? bpb.bpbSecPerClust: rds))); 63446686Sbrian got_siginfo = 0; 63543693Sbrian } 63643693Sbrian x = lsn; 63743693Sbrian if (opt_B && 63843693Sbrian fat == 32 && bpb.bpbBackup != MAXU16 && 63943401Sbrian bss <= bpb.bpbBackup && x >= bpb.bpbBackup) { 64036285Sbrian x -= bpb.bpbBackup; 64143693Sbrian if (!x && lseek(fd1, opt_ofs, SEEK_SET)) 64243693Sbrian err(1, "%s", bname); 64343693Sbrian } 64443693Sbrian if (opt_B && x < bss) { 64544106Sbrian if ((n = read(fd1, img, bpb.bpbBytesPerSec)) == -1) 64644106Sbrian err(1, "%s", bname); 64744106Sbrian if ((unsigned)n != bpb.bpbBytesPerSec) 64844123Sbrian errx(1, "%s: can't read sector %u", bname, x); 64944106Sbrian } else 65044123Sbrian memset(img, 0, bpb.bpbBytesPerSec); 65144123Sbrian if (!lsn || 65244123Sbrian (fat == 32 && bpb.bpbBackup != MAXU16 && 65343693Sbrian lsn == bpb.bpbBackup)) { 65444106Sbrian x1 = sizeof(struct bs); 65544106Sbrian bsbpb = (struct bsbpb *)(img + x1); 65644123Sbrian mk2(bsbpb->bpbBytesPerSec, bpb.bpbBytesPerSec); 65744106Sbrian mk1(bsbpb->bpbSecPerClust, bpb.bpbSecPerClust); 65844123Sbrian mk2(bsbpb->bpbResSectors, bpb.bpbResSectors); 65944123Sbrian mk1(bsbpb->bpbFATs, bpb.bpbFATs); 66044123Sbrian mk2(bsbpb->bpbRootDirEnts, bpb.bpbRootDirEnts); 66143693Sbrian mk2(bsbpb->bpbSectors, bpb.bpbSectors); 66236285Sbrian mk1(bsbpb->bpbMedia, bpb.bpbMedia); 66343693Sbrian mk2(bsbpb->bpbFATsecs, bpb.bpbFATsecs); 66443693Sbrian mk2(bsbpb->bpbSecPerTrack, bpb.bpbSecPerTrack); 66543693Sbrian mk2(bsbpb->bpbHeads, bpb.bpbHeads); 66643693Sbrian mk4(bsbpb->bpbHiddenSecs, bpb.bpbHiddenSecs); 66743693Sbrian mk4(bsbpb->bpbHugeSectors, bpb.bpbHugeSectors); 66843693Sbrian x1 += sizeof(struct bsbpb); 66943693Sbrian if (fat == 32) { 67043693Sbrian bsxbpb = (struct bsxbpb *)(img + x1); 67143693Sbrian mk4(bsxbpb->bpbBigFATsecs, bpb.bpbBigFATsecs); 6726059Samurai mk2(bsxbpb->bpbExtFlags, 0); 6736059Samurai mk2(bsxbpb->bpbFSVers, 0); 67443693Sbrian mk4(bsxbpb->bpbRootClust, bpb.bpbRootClust); 67543693Sbrian mk2(bsxbpb->bpbFSInfo, bpb.bpbFSInfo); 67646686Sbrian mk2(bsxbpb->bpbBackup, bpb.bpbBackup); 67746686Sbrian x1 += sizeof(struct bsxbpb); 67846686Sbrian } 67943888Sbrian bsx = (struct bsx *)(img + x1); 68046686Sbrian mk1(bsx->exBootSignature, 0x29); 68146686Sbrian if (Iflag) 68244123Sbrian x = opt_I; 68344123Sbrian else 68444123Sbrian x = (((u_int)(1 + tm->tm_mon) << 8 | 68544123Sbrian (u_int)tm->tm_mday) + 68643693Sbrian ((u_int)tm->tm_sec << 8 | 6876059Samurai (u_int)(tv.tv_usec / 10))) << 16 | 68843693Sbrian ((u_int)(1900 + tm->tm_year) + 68943693Sbrian ((u_int)tm->tm_hour << 8 | 69043693Sbrian (u_int)tm->tm_min)); 69143693Sbrian mk4(bsx->exVolumeID, x); 69246686Sbrian mklabel(bsx->exVolumeLabel, opt_L ? opt_L : "NO_NAME"); 69348817Sbrian sprintf(buf, "FAT%u", fat); 69448817Sbrian setstr(bsx->exFileSysType, buf, sizeof(bsx->exFileSysType)); 69545907Sbrian if (!opt_B) { 69645907Sbrian x1 += sizeof(struct bsx); 69746686Sbrian bs = (struct bs *)img; 69845907Sbrian mk1(bs->bsJump[0], 0xeb); 69945907Sbrian mk1(bs->bsJump[1], x1 - 2); 70045907Sbrian mk1(bs->bsJump[2], 0x90); 70143693Sbrian setstr(bs->bsOemName, opt_O ? opt_O : "BSD4.4 ", 70243693Sbrian sizeof(bs->bsOemName)); 70343693Sbrian memcpy(img + x1, bootcode, sizeof(bootcode)); 70446686Sbrian mk2(img + MINBPS - 2, DOSMAGIC); 70543693Sbrian } 70644106Sbrian } else if (fat == 32 && bpb.bpbFSInfo != MAXU16 && 70744123Sbrian (lsn == bpb.bpbFSInfo || 70844106Sbrian (bpb.bpbBackup != MAXU16 && 70944106Sbrian lsn == bpb.bpbBackup + bpb.bpbFSInfo))) { 71044106Sbrian mk4(img, 0x41615252); 71144106Sbrian mk4(img + MINBPS - 28, 0x61417272); 71243693Sbrian mk4(img + MINBPS - 24, 0xffffffff); 71344122Sbrian mk4(img + MINBPS - 20, bpb.bpbRootClust); 71444122Sbrian mk2(img + MINBPS - 2, DOSMAGIC); 71544106Sbrian } else if (lsn >= bpb.bpbResSectors && lsn < dir && 71644106Sbrian !((lsn - bpb.bpbResSectors) % 71744106Sbrian (bpb.bpbFATsecs ? bpb.bpbFATsecs : 71844106Sbrian bpb.bpbBigFATsecs))) { 71944123Sbrian mk1(img[0], bpb.bpbMedia); 72044123Sbrian for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++) 72144123Sbrian mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff); 72244106Sbrian } else if (lsn == dir && opt_L) { 72345907Sbrian de = (struct de *)img; 72444123Sbrian mklabel(de->deName, opt_L); 72544123Sbrian mk1(de->deAttributes, 050); 72644123Sbrian x = (u_int)tm->tm_hour << 11 | 72744123Sbrian (u_int)tm->tm_min << 5 | 72844123Sbrian (u_int)tm->tm_sec >> 1; 72944106Sbrian mk2(de->deMTime, x); 73043693Sbrian x = (u_int)(tm->tm_year - 80) << 9 | 73144106Sbrian (u_int)(tm->tm_mon + 1) << 5 | 73244123Sbrian (u_int)tm->tm_mday; 73344123Sbrian mk2(de->deMDate, x); 73444123Sbrian } 73544123Sbrian if ((n = write(fd, img, bpb.bpbBytesPerSec)) == -1) 73644123Sbrian err(1, "%s", fname); 73744123Sbrian if ((unsigned)n != bpb.bpbBytesPerSec) 73844106Sbrian errx(1, "%s: can't write sector %u", fname, lsn); 73944106Sbrian } 74044106Sbrian } 74143693Sbrian return 0; 74243693Sbrian} 7436059Samurai 74443693Sbrian/* 74543693Sbrian * Exit with error if file system is mounted. 74643693Sbrian */ 74743693Sbrianstatic void 74843693Sbriancheck_mounted(const char *fname, mode_t mode) 7496059Samurai{ 75043693Sbrian struct statfs *mp; 7516059Samurai const char *s1, *s2; 7526059Samurai size_t len; 75343693Sbrian int n, r; 75443693Sbrian 75543693Sbrian if (!(n = getmntinfo(&mp, MNT_NOWAIT))) 75643693Sbrian err(1, "getmntinfo"); 75743693Sbrian len = strlen(_PATH_DEV); 75843693Sbrian s1 = fname; 75943693Sbrian if (!strncmp(s1, _PATH_DEV, len)) 76043693Sbrian s1 += len; 76143693Sbrian r = S_ISCHR(mode) && s1 != fname && *s1 == 'r'; 76243693Sbrian for (; n--; mp++) { 76343693Sbrian s2 = mp->f_mntfromname; 76443693Sbrian if (!strncmp(s2, _PATH_DEV, len)) 7656059Samurai s2 += len; 76643693Sbrian if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) || 76743693Sbrian !strcmp(s1, s2)) 7686059Samurai errx(1, "%s is mounted on %s", fname, mp->f_mntonname); 76943693Sbrian } 7706059Samurai} 77143693Sbrian 77254912Sbrian/* 77346686Sbrian * Get a standard format. 7746059Samurai */ 775static void 776getstdfmt(const char *fmt, struct bpb *bpb) 777{ 778 u_int x, i; 779 780 x = sizeof(stdfmt) / sizeof(stdfmt[0]); 781 for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++); 782 if (i == x) 783 errx(1, "%s: unknown standard format", fmt); 784 *bpb = stdfmt[i].bpb; 785} 786 787/* 788 * Get disk slice, partition, and geometry information. 789 */ 790static void 791getdiskinfo(int fd, const char *fname, const char *dtype, __unused int oflag, 792 struct bpb *bpb) 793{ 794 struct disklabel *lp, dlp; 795 struct fd_type type; 796 off_t ms, hs = 0; 797 798 lp = NULL; 799 800 /* If the user specified a disk type, try to use that */ 801 if (dtype != NULL) { 802 lp = getdiskbyname(dtype); 803 } 804 805 /* Maybe it's a floppy drive */ 806 if (lp == NULL) { 807 if (ioctl(fd, DIOCGMEDIASIZE, &ms) == -1) { 808 struct stat st; 809 810 if (fstat(fd, &st)) 811 err(1, "Cannot get disk size"); 812 /* create a fake geometry for a file image */ 813 ms = st.st_size; 814 dlp.d_secsize = 512; 815 dlp.d_nsectors = 63; 816 dlp.d_ntracks = 255; 817 dlp.d_secperunit = ms / dlp.d_secsize; 818 lp = &dlp; 819 } else if (ioctl(fd, FD_GTYPE, &type) != -1) { 820 dlp.d_secsize = 128 << type.secsize; 821 dlp.d_nsectors = type.sectrac; 822 dlp.d_ntracks = type.heads; 823 dlp.d_secperunit = ms / dlp.d_secsize; 824 lp = &dlp; 825 } 826 } 827 828 /* Maybe it's a fixed drive */ 829 if (lp == NULL) { 830 if (bpb->bpbBytesPerSec) 831 dlp.d_secsize = bpb->bpbBytesPerSec; 832 if (ioctl(fd, DIOCGDINFO, &dlp) == -1) { 833 if (bpb->bpbBytesPerSec == 0 && ioctl(fd, DIOCGSECTORSIZE, 834 &dlp.d_secsize) == -1) 835 errx(1, "Cannot get sector size, %s", strerror(errno)); 836 837 dlp.d_secperunit = ms / dlp.d_secsize; 838 839 if (bpb->bpbSecPerTrack == 0 && ioctl(fd, DIOCGFWSECTORS, 840 &dlp.d_nsectors) == -1) { 841 warnx("Cannot get number of sectors per track, %s", strerror(errno)); 842 dlp.d_nsectors = 63; 843 } 844 if (bpb->bpbHeads == 0 && 845 ioctl(fd, DIOCGFWHEADS, &dlp.d_ntracks) == -1) { 846 warnx("Cannot get number of heads, %s", strerror(errno)); 847 if (dlp.d_secperunit <= 63*1*1024) 848 dlp.d_ntracks = 1; 849 else if (dlp.d_secperunit <= 63*16*1024) 850 dlp.d_ntracks = 16; 851 else 852 dlp.d_ntracks = 255; 853 } 854 } 855 856 hs = (ms / dlp.d_secsize) - dlp.d_secperunit; 857 lp = &dlp; 858 } 859 860 if (bpb->bpbBytesPerSec == 0) 861 bpb->bpbBytesPerSec = ckgeom(fname, lp->d_secsize, "bytes/sector"); 862 if (bpb->bpbSecPerTrack == 0) 863 bpb->bpbSecPerTrack = ckgeom(fname, lp->d_nsectors, "sectors/track"); 864 if (bpb->bpbHeads == 0) 865 bpb->bpbHeads = ckgeom(fname, lp->d_ntracks, "drive heads"); 866 if (bpb->bpbHugeSectors == 0) 867 bpb->bpbHugeSectors = lp->d_secperunit; 868 if (bpb->bpbHiddenSecs == 0) 869 bpb->bpbHiddenSecs = hs; 870} 871 872/* 873 * Print out BPB values. 874 */ 875static void 876print_bpb(struct bpb *bpb) 877{ 878 printf("BytesPerSec=%u SecPerClust=%u ResSectors=%u FATs=%u", 879 bpb->bpbBytesPerSec, bpb->bpbSecPerClust, bpb->bpbResSectors, 880 bpb->bpbFATs); 881 if (bpb->bpbRootDirEnts) 882 printf(" RootDirEnts=%u", bpb->bpbRootDirEnts); 883 if (bpb->bpbSectors) 884 printf(" Sectors=%u", bpb->bpbSectors); 885 printf(" Media=%#x", bpb->bpbMedia); 886 if (bpb->bpbFATsecs) 887 printf(" FATsecs=%u", bpb->bpbFATsecs); 888 printf(" SecPerTrack=%u Heads=%u HiddenSecs=%u", bpb->bpbSecPerTrack, 889 bpb->bpbHeads, bpb->bpbHiddenSecs); 890 if (bpb->bpbHugeSectors) 891 printf(" HugeSectors=%u", bpb->bpbHugeSectors); 892 if (!bpb->bpbFATsecs) { 893 printf(" FATsecs=%u RootCluster=%u", bpb->bpbBigFATsecs, 894 bpb->bpbRootClust); 895 printf(" FSInfo="); 896 printf(bpb->bpbFSInfo == MAXU16 ? "%#x" : "%u", bpb->bpbFSInfo); 897 printf(" Backup="); 898 printf(bpb->bpbBackup == MAXU16 ? "%#x" : "%u", bpb->bpbBackup); 899 } 900 printf("\n"); 901} 902 903/* 904 * Check a disk geometry value. 905 */ 906static u_int 907ckgeom(const char *fname, u_int val, const char *msg) 908{ 909 if (!val) 910 errx(1, "%s: no default %s", fname, msg); 911 if (val > MAXU16) 912 errx(1, "%s: illegal %s %d", fname, msg, val); 913 return val; 914} 915 916/* 917 * Convert and check a numeric option argument. 918 */ 919static u_int 920argtou(const char *arg, u_int lo, u_int hi, const char *msg) 921{ 922 char *s; 923 u_long x; 924 925 errno = 0; 926 x = strtoul(arg, &s, 0); 927 if (errno || !*arg || *s || x < lo || x > hi) 928 errx(1, "%s: bad %s", arg, msg); 929 return x; 930} 931 932/* 933 * Same for off_t, with optional skmgpP suffix 934 */ 935static off_t 936argtooff(const char *arg, const char *msg) 937{ 938 char *s; 939 off_t x; 940 941 errno = 0; 942 x = strtoll(arg, &s, 0); 943 /* allow at most one extra char */ 944 if (errno || x < 0 || (s[0] && s[1]) ) 945 errx(1, "%s: bad %s", arg, msg); 946 if (*s) { /* the extra char is the multiplier */ 947 switch (*s) { 948 default: 949 errx(1, "%s: bad %s", arg, msg); 950 /* notreached */ 951 952 case 's': /* sector */ 953 case 'S': 954 x <<= 9; /* times 512 */ 955 break; 956 957 case 'k': /* kilobyte */ 958 case 'K': 959 x <<= 10; /* times 1024 */ 960 break; 961 962 case 'm': /* megabyte */ 963 case 'M': 964 x <<= 20; /* times 1024*1024 */ 965 break; 966 967 case 'g': /* gigabyte */ 968 case 'G': 969 x <<= 30; /* times 1024*1024*1024 */ 970 break; 971 972 case 'p': /* partition start */ 973 case 'P': 974 case 'l': /* partition length */ 975 case 'L': 976 errx(1, "%s: not supported yet %s", arg, msg); 977 /* notreached */ 978 } 979 } 980 return x; 981} 982 983/* 984 * Check a volume label. 985 */ 986static int 987oklabel(const char *src) 988{ 989 int c, i; 990 991 for (i = 0; i <= 11; i++) { 992 c = (u_char)*src++; 993 if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) 994 break; 995 } 996 return i && !c; 997} 998 999/* 1000 * Make a volume label. 1001 */ 1002static void 1003mklabel(u_int8_t *dest, const char *src) 1004{ 1005 int c, i; 1006 1007 for (i = 0; i < 11; i++) { 1008 c = *src ? toupper(*src++) : ' '; 1009 *dest++ = !i && c == '\xe5' ? 5 : c; 1010 } 1011} 1012 1013/* 1014 * Copy string, padding with spaces. 1015 */ 1016static void 1017setstr(u_int8_t *dest, const char *src, size_t len) 1018{ 1019 while (len--) 1020 *dest++ = *src ? *src++ : ' '; 1021} 1022 1023/* 1024 * Print usage message. 1025 */ 1026static void 1027usage(void) 1028{ 1029 fprintf(stderr, 1030 "usage: newfs_msdos [ -options ] special [disktype]\n" 1031 "where the options are:\n" 1032 "\t-@ create file system at specified offset\n" 1033 "\t-B get bootstrap from file\n" 1034 "\t-C create image file with specified size\n" 1035 "\t-F FAT type (12, 16, or 32)\n" 1036 "\t-I volume ID\n" 1037 "\t-L volume label\n" 1038 "\t-N don't create file system: just print out parameters\n" 1039 "\t-O OEM string\n" 1040 "\t-S bytes/sector\n" 1041 "\t-a sectors/FAT\n" 1042 "\t-b block size\n" 1043 "\t-c sectors/cluster\n" 1044 "\t-e root directory entries\n" 1045 "\t-f standard format\n" 1046 "\t-h drive heads\n" 1047 "\t-i file system info sector\n" 1048 "\t-k backup boot sector\n" 1049 "\t-m media descriptor\n" 1050 "\t-n number of FATs\n" 1051 "\t-o hidden sectors\n" 1052 "\t-r reserved sectors\n" 1053 "\t-s file system size (sectors)\n" 1054 "\t-u sectors/track\n"); 1055 exit(1); 1056} 1057 1058static void 1059infohandler(int sig __unused) 1060{ 1061 1062 got_siginfo = 1; 1063} 1064