newfs_msdos.c revision e7aa2b2c8378b458345477d1f6d9904490263bb6
1d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek/* 2d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * Copyright (c) 1998 Robert Nordier 3d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * All rights reserved. 4d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * 5d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * Redistribution and use in source and binary forms, with or without 6d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * modification, are permitted provided that the following conditions 7d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * are met: 8d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * 1. Redistributions of source code must retain the above copyright 9d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * notice, this list of conditions and the following disclaimer. 10843e934ba8c6ebc00d2f6969a50af7074597e8e3Gabor Greif * 2. Redistributions in binary form must reproduce the above copyright 11d2592a34a059e7cbb2b11dc53649ac4912422909Argyrios Kyrtzidis * notice, this list of conditions and the following disclaimer in 12d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * the documentation and/or other materials provided with the 13d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * distribution. 14d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * 15176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS 16176edba5311f6eff0cad2631449885ddf4fbc9eaStephen Hines * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY 19d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 205e2d2c2ee3cf410643e0f9a5701708e51409d973Benjamin Kramer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 21d47d3b0cfeb7e8564ff77f48130fe63282b6d127Chris Lattner * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 224967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 23882998923889a2fcce9b49696506c499e22cf38fTed Kremenek * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 244967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 25882998923889a2fcce9b49696506c499e22cf38fTed Kremenek * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2630a2e16f6c27f888dd11eba6bbbae1e980078fcbChandler Carruth */ 2730a2e16f6c27f888dd11eba6bbbae1e980078fcbChandler Carruth 28651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#ifndef lint 2930a2e16f6c27f888dd11eba6bbbae1e980078fcbChandler Carruthstatic const char rcsid[] = 30d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek "$FreeBSD: src/sbin/newfs_msdos/newfs_msdos.c,v 1.33 2009/04/11 14:56:29 ed Exp $"; 311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#endif /* not lint */ 32e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek 335a4f98ff943e6a501b0fe47ade007c9bbf96cb88Argyrios Kyrtzidis#include <sys/param.h> 345a4f98ff943e6a501b0fe47ade007c9bbf96cb88Argyrios Kyrtzidis 359ef6537a894c33003359b1f9b9676e9178e028b7Ted Kremenek#ifndef ANDROID 36e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek#include <sys/fdcio.h> 3732f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose#include <sys/disk.h> 389697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek#include <sys/disklabel.h> 39edeb5b6b50e773b243e0ee0d84589cd1f7dea9b0Ted Kremenek#include <sys/mount.h> 401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#else 415fc7def35ee858791e591d005b4ae343632ca931Anna Zaks#include <stdarg.h> 42d9b6ad609ef0b90527e848ba69dc2e492771be4fZhongxing Xu#include <linux/fs.h> 439697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek#include <linux/hdreg.h> 4445257c37a4e9a8f915661e0f964aec375909eb4cZhongxing Xu#endif 45d763eb91aab5bdecd11825fadb35d6d8cc905f63Ted Kremenek 469697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek#include <sys/stat.h> 474967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar#include <sys/time.h> 481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 499697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek#include <ctype.h> 509ab6b9cfb76ee56a61829e2bdb08e5cdc288726eTed Kremenek#include <err.h> 519697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek#include <errno.h> 524967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar#include <fcntl.h> 539ab6b9cfb76ee56a61829e2bdb08e5cdc288726eTed Kremenek#include <inttypes.h> 5400a3a5f024ac54088ab887712b292171188064f0Ted Kremenek#include <paths.h> 551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#include <stdio.h> 56651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#include <stdlib.h> 5714d2328ecfc5102b077fa2c2c129dce1574c8831Zhongxing Xu#include <string.h> 5800a3a5f024ac54088ab887712b292171188064f0Ted Kremenek#include <time.h> 591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#include <unistd.h> 60651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 614967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar#define MAXU16 0xffff /* maximum unsigned 16-bit quantity */ 621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#define BPN 4 /* bits per nibble */ 63651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines#define NPB 2 /* nibbles per byte */ 649ab6b9cfb76ee56a61829e2bdb08e5cdc288726eTed Kremenek 65d763eb91aab5bdecd11825fadb35d6d8cc905f63Ted Kremenek#define DOSMAGIC 0xaa55 /* DOS magic number */ 669c378f705405d37f49795d5e915989de774fe11fTed Kremenek#define MINBPS 512 /* minimum bytes per sector */ 674967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar#define MAXSPC 128 /* maximum sectors per cluster */ 68eabf776661662a8e652eb692084d20fddffd5ccaZhongxing Xu#define MAXNFT 16 /* maximum number of FATs */ 69eabf776661662a8e652eb692084d20fddffd5ccaZhongxing Xu#define DEFBLK 4096 /* default block size */ 70eabf776661662a8e652eb692084d20fddffd5ccaZhongxing Xu#define DEFBLK16 2048 /* default block size FAT16 */ 713cdf584e068056540769dab56cad333e95a89750Anna Zaks#define DEFRDE 512 /* default root directory entries */ 723cdf584e068056540769dab56cad333e95a89750Anna Zaks#define RESFTE 2 /* reserved FAT entries */ 73361fa8ecd122a5b06c2c59d44419e202f42e1c5dTed Kremenek#define MINCLS12 1 /* minimum FAT12 clusters */ 749c378f705405d37f49795d5e915989de774fe11fTed Kremenek#define MINCLS16 0x1000 /* minimum FAT16 clusters */ 7560a6e0ce72a24d6247602625c631fc3dc7bfd8d4Ted Kremenek#define MINCLS32 2 /* minimum FAT32 clusters */ 7600a3a5f024ac54088ab887712b292171188064f0Ted Kremenek#define MAXCLS12 0xfed /* maximum FAT12 clusters */ 773133f79cf451e6302dd05262b4bb53a3e4fd6300Ted Kremenek#define MAXCLS16 0xfff5 /* maximum FAT16 clusters */ 789c378f705405d37f49795d5e915989de774fe11fTed Kremenek#define MAXCLS32 0xffffff5 /* maximum FAT32 clusters */ 7900a3a5f024ac54088ab887712b292171188064f0Ted Kremenek 8000a3a5f024ac54088ab887712b292171188064f0Ted Kremenek#define mincls(fat) ((fat) == 12 ? MINCLS12 : \ 813133f79cf451e6302dd05262b4bb53a3e4fd6300Ted Kremenek (fat) == 16 ? MINCLS16 : \ 824967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar MINCLS32) 834967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar 844967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar#define maxcls(fat) ((fat) == 12 ? MAXCLS12 : \ 851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (fat) == 16 ? MAXCLS16 : \ 869c378f705405d37f49795d5e915989de774fe11fTed Kremenek MAXCLS32) 87a880b66d6e0e446501fcbc27b87a1ec0e4ecde4cTed Kremenek 889c378f705405d37f49795d5e915989de774fe11fTed Kremenek#define mk1(p, x) \ 891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (p) = (u_int8_t)(x) 90651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump#define mk2(p, x) \ 92651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines (p)[0] = (u_int8_t)(x), \ 931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (p)[1] = (u_int8_t)((x) >> 010) 949c378f705405d37f49795d5e915989de774fe11fTed Kremenek 953133f79cf451e6302dd05262b4bb53a3e4fd6300Ted Kremenek#define mk4(p, x) \ 963133f79cf451e6302dd05262b4bb53a3e4fd6300Ted Kremenek (p)[0] = (u_int8_t)(x), \ 974967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar (p)[1] = (u_int8_t)((x) >> 010), \ 98b5abb429e7aac731c3b4363a6118a6b3a6e27abcTed Kremenek (p)[2] = (u_int8_t)((x) >> 020), \ 993133f79cf451e6302dd05262b4bb53a3e4fd6300Ted Kremenek (p)[3] = (u_int8_t)((x) >> 030) 10060a6e0ce72a24d6247602625c631fc3dc7bfd8d4Ted Kremenek 10100a3a5f024ac54088ab887712b292171188064f0Ted Kremenek#define argto1(arg, lo, msg) argtou(arg, lo, 0xff, msg) 102a880b66d6e0e446501fcbc27b87a1ec0e4ecde4cTed Kremenek#define argto2(arg, lo, msg) argtou(arg, lo, 0xffff, msg) 10300a3a5f024ac54088ab887712b292171188064f0Ted Kremenek#define argto4(arg, lo, msg) argtou(arg, lo, 0xffffffff, msg) 104a880b66d6e0e446501fcbc27b87a1ec0e4ecde4cTed Kremenek#define argtox(arg, lo, msg) argtou(arg, lo, UINT_MAX, msg) 105651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 1063133f79cf451e6302dd05262b4bb53a3e4fd6300Ted Kremenekstruct bs { 10700a3a5f024ac54088ab887712b292171188064f0Ted Kremenek u_int8_t jmp[3]; /* bootstrap entry point */ 108a880b66d6e0e446501fcbc27b87a1ec0e4ecde4cTed Kremenek u_int8_t oem[8]; /* OEM name and version */ 10900a3a5f024ac54088ab887712b292171188064f0Ted Kremenek}; 1109c378f705405d37f49795d5e915989de774fe11fTed Kremenek 1114967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainarstruct bsbpb { 1121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump u_int8_t bps[2]; /* bytes per sector */ 11300a3a5f024ac54088ab887712b292171188064f0Ted Kremenek u_int8_t spc; /* sectors per cluster */ 1141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump u_int8_t res[2]; /* reserved sectors */ 11575eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks u_int8_t nft; /* number of FATs */ 11675eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks u_int8_t rde[2]; /* root directory entries */ 117fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek u_int8_t sec[2]; /* total sectors */ 118fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek u_int8_t mid; /* media descriptor */ 1199697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek u_int8_t spf[2]; /* sectors per FAT */ 1201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump u_int8_t spt[2]; /* sectors per track */ 121fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek u_int8_t hds[2]; /* drive heads */ 1229697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek u_int8_t hid[4]; /* hidden sectors */ 1234967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar u_int8_t bsec[4]; /* big total sectors */ 124fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek}; 125fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek 1269697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenekstruct bsxbpb { 1271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump u_int8_t bspf[4]; /* big sectors per FAT */ 128651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines u_int8_t xflg[2]; /* FAT control flags */ 1291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump u_int8_t vers[2]; /* file system version */ 130651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines u_int8_t rdcl[4]; /* root directory start cluster */ 1314967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar u_int8_t infs[2]; /* file system info sector */ 1321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump u_int8_t bkbs[2]; /* backup boot sector */ 133fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek u_int8_t rsvd[12]; /* reserved */ 1349697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek}; 1354967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar 136fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenekstruct bsx { 137fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek u_int8_t drv; /* drive number */ 138fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek u_int8_t rsvd; /* reserved */ 1391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump u_int8_t sig; /* extended boot signature */ 140651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines u_int8_t volid[4]; /* volume ID number */ 141fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek u_int8_t label[11]; /* volume label */ 142fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek u_int8_t type[8]; /* file system type */ 1431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump}; 144fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek 1459c378f705405d37f49795d5e915989de774fe11fTed Kremenekstruct de { 1464967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar u_int8_t namext[11]; /* name and extension */ 1471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump u_int8_t attr; /* attributes */ 148fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek u_int8_t rsvd[10]; /* reserved */ 149d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek u_int8_t time[2]; /* creation time */ 150bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose u_int8_t date[2]; /* creation date */ 151bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose u_int8_t clus[2]; /* starting cluster */ 152bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose u_int8_t size[4]; /* size */ 15332f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose}; 15432f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose 15532f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rosestruct bpb { 15632f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose u_int bps; /* bytes per sector */ 15732f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose u_int spc; /* sectors per cluster */ 1584967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar u_int res; /* reserved sectors */ 15932f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose u_int nft; /* number of FATs */ 16032f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose u_int rde; /* root directory entries */ 16132f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose u_int sec; /* total sectors */ 162651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines u_int mid; /* media descriptor */ 16332f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose u_int spf; /* sectors per FAT */ 164651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines u_int spt; /* sectors per track */ 16532f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose u_int hds; /* drive heads */ 16632f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose u_int hid; /* hidden sectors */ 1674967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar u_int bsec; /* big total sectors */ 16832f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose u_int bspf; /* big sectors per FAT */ 16932f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose u_int rdcl; /* root directory start cluster */ 17032f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose u_int infs; /* file system info sector */ 171651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines u_int bkbs; /* backup boot sector */ 17232f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose}; 17332f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose 17432f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose#define BPBGAP 0, 0, 0, 0, 0, 0 17532f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose 1769c378f705405d37f49795d5e915989de774fe11fTed Kremenekstatic struct { 1774967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar const char *name; 17832f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose struct bpb bpb; 17932f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose} const stdfmt[] = { 18032f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose {"160", {512, 1, 1, 2, 64, 320, 0xfe, 1, 8, 1, BPBGAP}}, 181bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose {"180", {512, 1, 1, 2, 64, 360, 0xfc, 2, 9, 1, BPBGAP}}, 182bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose {"320", {512, 2, 1, 2, 112, 640, 0xff, 1, 8, 2, BPBGAP}}, 183bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose {"360", {512, 2, 1, 2, 112, 720, 0xfd, 2, 9, 2, BPBGAP}}, 184bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose {"640", {512, 2, 1, 2, 112, 1280, 0xfb, 2, 8, 2, BPBGAP}}, 185bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose {"720", {512, 2, 1, 2, 112, 1440, 0xf9, 3, 9, 2, BPBGAP}}, 186bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose {"1200", {512, 1, 1, 2, 224, 2400, 0xf9, 7, 15, 2, BPBGAP}}, 1879c378f705405d37f49795d5e915989de774fe11fTed Kremenek {"1232", {1024,1, 1, 2, 192, 1232, 0xfe, 2, 8, 2, BPBGAP}}, 188bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose {"1440", {512, 1, 1, 2, 224, 2880, 0xf0, 9, 18, 2, BPBGAP}}, 189bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose {"2880", {512, 2, 1, 2, 240, 5760, 0xf0, 9, 36, 2, BPBGAP}} 1909c378f705405d37f49795d5e915989de774fe11fTed Kremenek}; 191bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 1929c378f705405d37f49795d5e915989de774fe11fTed Kremenekstatic const u_int8_t bootcode[] = { 1939c378f705405d37f49795d5e915989de774fe11fTed Kremenek 0xfa, /* cli */ 1944967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar 0x31, 0xc0, /* xor ax,ax */ 195bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0x8e, 0xd0, /* mov ss,ax */ 196bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0xbc, 0x00, 0x7c, /* mov sp,7c00h */ 1979c378f705405d37f49795d5e915989de774fe11fTed Kremenek 0xfb, /* sti */ 198bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0x8e, 0xd8, /* mov ds,ax */ 1999c378f705405d37f49795d5e915989de774fe11fTed Kremenek 0xe8, 0x00, 0x00, /* call $ + 3 */ 200bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0x5e, /* pop si */ 201651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 0x83, 0xc6, 0x19, /* add si,+19h */ 202bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0xbb, 0x07, 0x00, /* mov bx,0007h */ 203651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 0xfc, /* cld */ 204bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0xac, /* lodsb */ 205bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0x84, 0xc0, /* test al,al */ 206bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0x74, 0x06, /* jz $ + 8 */ 207bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0xb4, 0x0e, /* mov ah,0eh */ 2084967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar 0xcd, 0x10, /* int 10h */ 209bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0xeb, 0xf5, /* jmp $ - 9 */ 210bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0x30, 0xe4, /* xor ah,ah */ 211bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0xcd, 0x16, /* int 16h */ 212bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0xcd, 0x19, /* int 19h */ 213bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0x0d, 0x0a, 214bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 'N', 'o', 'n', '-', 's', 'y', 's', 't', 215bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 'e', 'm', ' ', 'd', 'i', 's', 'k', 216651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines 0x0d, 0x0a, 217bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 'P', 'r', 'e', 's', 's', ' ', 'a', 'n', 218bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 'y', ' ', 'k', 'e', 'y', ' ', 't', 'o', 219bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose ' ', 'r', 'e', 'b', 'o', 'o', 't', 220bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 0x0d, 0x0a, 2219c378f705405d37f49795d5e915989de774fe11fTed Kremenek 0 2224967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar}; 223bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 224bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rosestatic void check_mounted(const char *, mode_t); 225bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rosestatic void getstdfmt(const char *, struct bpb *); 226aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaksstatic void getdiskinfo(int, const char *, const char *, int, struct bpb *); 227aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaksstatic void print_bpb(struct bpb *); 228aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaksstatic u_int ckgeom(const char *, u_int, const char *); 229aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaksstatic u_int argtou(const char *, u_int, u_int, const char *); 230aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaksstatic off_t argtooff(const char *, const char *); 231aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaksstatic int oklabel(const char *); 232aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaksstatic void mklabel(u_int8_t *, const char *); 233aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaksstatic void setstr(u_int8_t *, const char *, size_t); 234aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaksstatic void usage(void); 235aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks 2364967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar/* 237aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks * Construct a FAT12, FAT16, or FAT32 file system. 238651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines */ 239aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaksint newfs_msdos_main(int argc, char *argv[]) 2404617e2843e711136746865d7d6d27c7cead21f2bEli Friedman{ 241aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks static const char opts[] = "@:NAB:C:F:I:L:O:S:a:b:c:e:f:h:i:k:m:n:o:r:s:u:"; 242651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines const char *opt_B = NULL, *opt_L = NULL, *opt_O = NULL, *opt_f = NULL; 243aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks u_int opt_F = 0, opt_I = 0, opt_S = 0, opt_a = 0, opt_b = 0, opt_c = 0; 244aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks u_int opt_e = 0, opt_h = 0, opt_i = 0, opt_k = 0, opt_m = 0, opt_n = 0; 245aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks u_int opt_o = 0, opt_r = 0, opt_s = 0, opt_u = 0; 2464967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar u_int opt_A = 0; 247aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks int opt_N = 0; 248aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks int Iflag = 0, mflag = 0, oflag = 0; 249aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks char buf[MAXPATHLEN]; 250aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks struct stat sb; 251aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks struct timeval tv; 252651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines struct bpb bpb; 253aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks struct tm *tm; 254aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks struct bs *bs; 255aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks struct bsbpb *bsbpb; 256aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks struct bsxbpb *bsxbpb; 257aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks struct bsx *bsx; 2584967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar struct de *de; 259aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks u_int8_t *img; 260aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks const char *fname, *dtype, *bname; 261aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks ssize_t n; 2624de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes time_t now; 2634de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes u_int fat, bss, rds, cls, dir, lsn, x, x1, x2; 264a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu u_int extra_res, alignment=0, set_res, set_spf, set_spc, tempx, attempts=0; 265a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu int ch, fd, fd1; 266a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu off_t opt_create = 0, opt_ofs = 0; 2674de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes 2684de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes while ((ch = getopt(argc, argv, opts)) != -1) 2694de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes switch (ch) { 270a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu case '@': 2714de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes opt_ofs = argtooff(optarg, "offset"); 272e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek break; 273e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek case 'N': 274651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines opt_N = 1; 2751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump break; 276e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek case 'A': 2771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump opt_A = 1; 2784de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes break; 2794de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes case 'B': 2804de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes opt_B = optarg; 2814de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes break; 2824de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes case 'C': 2834de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes opt_create = argtooff(optarg, "create size"); 2844de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes break; 2854de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes case 'F': 2864de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes if (strcmp(optarg, "12") && strcmp(optarg, "16") && strcmp(optarg, "32")) 2874de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes errx(1, "%s: bad FAT type", optarg); 2884de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes opt_F = atoi(optarg); 2894de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes break; 2904de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes case 'I': 2914de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes opt_I = argto4(optarg, 0, "volume ID"); 2924de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes Iflag = 1; 2934967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar break; 2944de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes case 'L': 295651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (!oklabel(optarg)) 2961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump errx(1, "%s: bad volume label", optarg); 297e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek opt_L = optarg; 298e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek break; 299a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu case 'O': 3001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (strlen(optarg) > 8) 301e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek errx(1, "%s: bad OEM string", optarg); 302a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu opt_O = optarg; 3034967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar break; 304e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek case 'S': 305a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu opt_S = argto2(optarg, 1, "bytes/sector"); 306e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek break; 307a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu case 'a': 308a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu opt_a = argto4(optarg, 1, "sectors/FAT"); 309a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu break; 310651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines case 'b': 3114de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes opt_b = argtox(optarg, 1, "block size"); 312a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu opt_c = 0; 3131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump break; 314e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek case 'c': 3159c378f705405d37f49795d5e915989de774fe11fTed Kremenek opt_c = argto1(optarg, 1, "sectors/cluster"); 3164967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar opt_b = 0; 3171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump break; 318a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu case 'e': 319a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu opt_e = argto2(optarg, 1, "directory entries"); 3204de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes break; 3214de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes case 'f': 3226d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks opt_f = optarg; 3236d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks break; 3246d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks case 'h': 3256d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks opt_h = argto2(optarg, 1, "drive heads"); 3266d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks break; 3276d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks case 'i': 3284967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar opt_i = argto2(optarg, 1, "info sector"); 3296d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks break; 330651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines case 'k': 3316d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks opt_k = argto2(optarg, 1, "backup sector"); 3326d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks break; 3336d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks case 'm': 3346d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks opt_m = argto1(optarg, 0, "media descriptor"); 3356d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks mflag = 1; 3366d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks break; 3376d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks case 'n': 3384967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar opt_n = argto1(optarg, 1, "number of FATs"); 3396d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks break; 3406d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks case 'o': 3416d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks opt_o = argto4(optarg, 0, "hidden sectors"); 3426d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks oflag = 1; 3436d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks break; 3446d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks case 'r': 345651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines opt_r = argto2(optarg, 1, "reserved sectors"); 3464de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes break; 3476d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks case 's': 3486d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks opt_s = argto4(optarg, 1, "file system size"); 3496d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks break; 3506d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks case 'u': 3514967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar opt_u = argto2(optarg, 1, "sectors/track"); 3526d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks break; 3536d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks default: 3546d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks usage(); 3554de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes } 3564de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes argc -= optind; 357e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek argv += optind; 358e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek if (argc < 1 || argc > 2) 359a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu usage(); 360a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu fname = *argv++; 361e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek if (!opt_create && !strchr(fname, '/')) { 362e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek snprintf(buf, sizeof(buf), "%s%s", _PATH_DEV, fname); 3634967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar if (!(fname = strdup(buf))) 364a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu err(1, "%s", buf); 365e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek } 366e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek dtype = *argv; 3671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (opt_A) { 368651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (opt_r) 3691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump errx(1, "align (-A) is incompatible with -r"); 370e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek if (opt_N) 371d9b6ad609ef0b90527e848ba69dc2e492771be4fZhongxing Xu errx(1, "align (-A) is incompatible with -N"); 3724967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar } 373e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek if (opt_create) { 374a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu if (opt_N) 375e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek errx(1, "create (-C) is incompatible with -N"); 376a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644); 377a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu if (fd == -1) 378a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu errx(1, "failed to create %s", fname); 379651f13cea278ec967336033dd032faef0e9fc2ecStephen Hines if (ftruncate(fd, opt_create)) 3804de561f470be0cffeff5a92a286e9d6bf9bd8cffRyan Govostes errx(1, "failed to initialize %jd bytes", (intmax_t)opt_create); 381a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu } else if ((fd = open(fname, opt_N ? O_RDONLY : O_RDWR)) == -1) 3821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump err(1, "%s", fname); 383e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek if (fstat(fd, &sb)) 3849c378f705405d37f49795d5e915989de774fe11fTed Kremenek err(1, "%s", fname); 3854967a710c84587c654b56c828382219c3937dacbPirama Arumuga Nainar if (opt_create) { 3861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!S_ISREG(sb.st_mode)) 387d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek warnx("warning, %s is not a regular file", fname); 388d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek } else { 389d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek if (!S_ISCHR(sb.st_mode)) 390e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek warnx("warning, %s is not a character device", fname); 391579ad7ac56f7940cc543b7216ee1b1a7de1ed712Anna Zaks } 39275eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks if (!opt_N) 3931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump check_mounted(fname, sb.st_mode); 39489f920940de4b414616cabb310c37fa84ed2476aAnna Zaks if (opt_ofs && opt_ofs != lseek(fd, opt_ofs, SEEK_SET)) 39589f920940de4b414616cabb310c37fa84ed2476aAnna Zaks errx(1, "cannot seek to %jd", (intmax_t)opt_ofs); 39689f920940de4b414616cabb310c37fa84ed2476aAnna Zaks memset(&bpb, 0, sizeof(bpb)); 39700a3a5f024ac54088ab887712b292171188064f0Ted Kremenek if (opt_f) { 39800a3a5f024ac54088ab887712b292171188064f0Ted Kremenek getstdfmt(opt_f, &bpb); 399e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek bpb.bsec = bpb.sec; 4009c378f705405d37f49795d5e915989de774fe11fTed Kremenek bpb.sec = 0; 4011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bpb.bspf = bpb.spf; 402d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek bpb.spf = 0; 4039c378f705405d37f49795d5e915989de774fe11fTed Kremenek } 404e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek if (opt_h) 405579ad7ac56f7940cc543b7216ee1b1a7de1ed712Anna Zaks bpb.hds = opt_h; 406579ad7ac56f7940cc543b7216ee1b1a7de1ed712Anna Zaks if (opt_u) 4071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bpb.spt = opt_u; 408d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek if (opt_S) 4091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump bpb.bps = opt_S; 410693de5d7feb92c096431c98ea6ee637494bfe6fbTed Kremenek if (opt_s) 4114193eca10ce0cc8b2dae887e935a43b26f492b5bZhongxing Xu bpb.bsec = opt_s; 41275eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks if (oflag) 4139697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek bpb.hid = opt_o; 41414d2328ecfc5102b077fa2c2c129dce1574c8831Zhongxing Xu if (!(opt_f || (opt_h && opt_u && opt_S && opt_s && oflag))) { 4153b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek off_t delta; 4163b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek getdiskinfo(fd, fname, dtype, oflag, &bpb); 4173b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek if (opt_s) { 4183b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek bpb.bsec = opt_s; 4196bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines } 4203b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek bpb.bsec -= (opt_ofs / bpb.bps); 4213b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek delta = bpb.bsec % bpb.spt; 4223b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek if (delta != 0) { 4233b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek warnx("trim %d sectors from %d to adjust to a multiple of %d", 4246bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines (int)delta, bpb.bsec, bpb.spt); 4253b1df8bb941a18c4a7256d7cfcbccb9de7e39995Ted Kremenek bpb.bsec -= delta; 42660a6e0ce72a24d6247602625c631fc3dc7bfd8d4Ted Kremenek } 4271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (bpb.spc == 0) { /* set defaults */ 428fb91c70e24e20f8704edf9bc5049ffbe7e234a38Ted Kremenek if (bpb.bsec <= 6000) /* about 3MB -> 512 bytes */ 4299697934650354bed2e509d8e7e44f21a1fb00f76Ted Kremenek bpb.spc = 1; 430a129eb974d8ff0ad4a4dd94ad1e6c5f98897ddb4Zhongxing Xu else if (bpb.bsec <= (1<<17)) /* 64M -> 4k */ 43132f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose bpb.spc = 8; 43232f2656b90900ac04c4b50e87c16749d0ceb9ef2Jordy Rose else if (bpb.bsec <= (1<<19)) /* 256M -> 8k */ 43375eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks bpb.spc = 16; 43475eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks else if (bpb.bsec <= (1<<22)) /* 2G -> 16k, some versions of windows 4353f10e32b15e54f507aed90cb72d73c7acaa500bbAnna Zaks require a minimum of 65527 clusters */ 4363f10e32b15e54f507aed90cb72d73c7acaa500bbAnna Zaks bpb.spc = 32; 4376bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines else 438bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose bpb.spc = 64; /* otherwise 32k */ 4396bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines } 440bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose } 441aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks if (!powerof2(bpb.bps)) 442aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks errx(1, "bytes/sector (%u) is not a power of 2", bpb.bps); 443aace9ef279be3dadd53b481aee568bd7701178b4Anna Zaks if (bpb.bps < MINBPS) 444d9b6ad609ef0b90527e848ba69dc2e492771be4fZhongxing Xu errx(1, "bytes/sector (%u) is too small; minimum is %u", 445e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek bpb.bps, MINBPS); 4461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (!(fat = opt_F)) { 447e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek if (opt_f) 448e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek fat = 12; 449e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek else if (!opt_e && (opt_i || opt_k)) 450e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek fat = 32; 451e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek } 4526d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks if ((fat == 32 && opt_e) || (fat != 32 && (opt_i || opt_k))) 4536d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks errx(1, "-%c is not a legal FAT%s option", 4546d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks fat == 32 ? 'e' : opt_i ? 'i' : 'k', 4556d6a83c3754b449ac24cb83bc6d3a50b10535061Anna Zaks fat == 32 ? "32" : "12/16"); 456e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek if (opt_f && fat == 32) 457e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek bpb.rde = 0; 4581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (opt_b) { 459e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek if (!powerof2(opt_b)) 460732cdf383f9030ff2b9fb28dfbdae2285ded80c6Ted Kremenek errx(1, "block size (%u) is not a power of 2", opt_b); 461d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek if (opt_b < bpb.bps) 4621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump errx(1, "block size (%u) is too small; minimum is %u", 46389f920940de4b414616cabb310c37fa84ed2476aAnna Zaks opt_b, bpb.bps); 46489f920940de4b414616cabb310c37fa84ed2476aAnna Zaks if (opt_b > bpb.bps * MAXSPC) 46589f920940de4b414616cabb310c37fa84ed2476aAnna Zaks errx(1, "block size (%u) is too large; maximum is %u", opt_b, bpb.bps * MAXSPC); 46689f920940de4b414616cabb310c37fa84ed2476aAnna Zaks bpb.spc = opt_b / bpb.bps; 46789f920940de4b414616cabb310c37fa84ed2476aAnna Zaks } 46889f920940de4b414616cabb310c37fa84ed2476aAnna Zaks if (opt_c) { 46989f920940de4b414616cabb310c37fa84ed2476aAnna Zaks if (!powerof2(opt_c)) 470e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek errx(1, "sectors/cluster (%u) is not a power of 2", opt_c); 471e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek bpb.spc = opt_c; 472d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek } 4731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (opt_r) 474914edfbb07c34d8cad8d0451193b4f9dd02a2d5aDavid Blaikie bpb.res = opt_r; 475241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek if (opt_n) { 476579ad7ac56f7940cc543b7216ee1b1a7de1ed712Anna Zaks if (opt_n > MAXNFT) 477579ad7ac56f7940cc543b7216ee1b1a7de1ed712Anna Zaks errx(1, "number of FATs (%u) is too large; maximum is %u", opt_n, MAXNFT); 478579ad7ac56f7940cc543b7216ee1b1a7de1ed712Anna Zaks bpb.nft = opt_n; 479579ad7ac56f7940cc543b7216ee1b1a7de1ed712Anna Zaks } 480579ad7ac56f7940cc543b7216ee1b1a7de1ed712Anna Zaks if (opt_e) 481bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek bpb.rde = opt_e; 482579ad7ac56f7940cc543b7216ee1b1a7de1ed712Anna Zaks if (mflag) { 483bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek if (opt_m < 0xf0) 4841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump errx(1, "illegal media descriptor (%#x)", opt_m); 485579ad7ac56f7940cc543b7216ee1b1a7de1ed712Anna Zaks bpb.mid = opt_m; 486bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek } 487bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek if (opt_a) 488bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek bpb.bspf = opt_a; 489bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek if (opt_i) 490bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek bpb.infs = opt_i; 4917fa9b4f258636d89342eda28f21a986c8ac353b1Ted Kremenek if (opt_k) 4927dadf79bd809cc01fe275f9a7243593bc2af5c10Jordy Rose bpb.bkbs = opt_k; 493241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek bss = 1; 494882998923889a2fcce9b49696506c499e22cf38fTed Kremenek bname = NULL; 495882998923889a2fcce9b49696506c499e22cf38fTed Kremenek fd1 = -1; 4961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (opt_B) { 497241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek bname = opt_B; 4980b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (!strchr(bname, '/')) { 4990b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks snprintf(buf, sizeof(buf), "/boot/%s", bname); 5000b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks if (!(bname = strdup(buf))) 5010b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks err(1, "%s", buf); 5020b3ade86a1c60cf0c7b56aa238aff458eb7f5974Anna Zaks } 5038501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks if ((fd1 = open(bname, O_RDONLY)) == -1 || fstat(fd1, &sb)) 5048501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks err(1, "%s", bname); 5058501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks if (!S_ISREG(sb.st_mode) || sb.st_size % bpb.bps || 506882998923889a2fcce9b49696506c499e22cf38fTed Kremenek sb.st_size < bpb.bps || sb.st_size > bpb.bps * MAXU16) 5078501b7a1c4c4a9ba0ea6cb8e500e601ef3759debAnna Zaks errx(1, "%s: inappropriate file type or format", bname); 5086bcf27bb9a4b5c3f79cb44c0e4654a6d7619ad89Stephen Hines bss = sb.st_size / bpb.bps; 5091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 510c179a7fbb294fe3ff6cf5479f6239a10f39628c7Zhongxing Xu if (!bpb.nft) 511c179a7fbb294fe3ff6cf5479f6239a10f39628c7Zhongxing Xu bpb.nft = 2; 512241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek if (!fat) { 513bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek if (bpb.bsec < (bpb.res ? bpb.res : bss) + 5145eca482fe895ea57bc82410222e6426c09e63284Ted Kremenek howmany((RESFTE + (bpb.spc ? MINCLS16 : MAXCLS12 + 1)) * 515882998923889a2fcce9b49696506c499e22cf38fTed Kremenek ((bpb.spc ? 16 : 12) / BPN), bpb.bps * NPB) * 516bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose bpb.nft + 51775eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks howmany(bpb.rde ? bpb.rde : DEFRDE, 51875eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks bpb.bps / sizeof(struct de)) + 51975eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks (bpb.spc ? MINCLS16 : MAXCLS12 + 1) * 52075eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks (bpb.spc ? bpb.spc : howmany(DEFBLK, bpb.bps))) 52175eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks fat = 12; 522241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek else if (bpb.rde || bpb.bsec < 523bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose (bpb.res ? bpb.res : bss) + 52475eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks howmany((RESFTE + MAXCLS16) * 2, bpb.bps) * bpb.nft + 52575eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks howmany(DEFRDE, bpb.bps / sizeof(struct de)) + 52675eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks (MAXCLS16 + 1) * 52775eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks (bpb.spc ? bpb.spc : howmany(8192, bpb.bps))) 52875eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks fat = 16; 52975eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks else 53075eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks fat = 32; 531bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose } 532bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose x = bss; 53375eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks if (fat == 32) { 53475eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks if (!bpb.infs) { 53575eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks if (x == MAXU16 || x == bpb.bkbs) 53675eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks errx(1, "no room for info sector"); 537241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek bpb.infs = x; 5381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump } 539bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek if (bpb.infs != MAXU16 && x <= bpb.infs) 540241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek x = bpb.infs + 1; 541241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek if (!bpb.bkbs) { 5421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (x == MAXU16) 543241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek errx(1, "no room for backup sector"); 544a97d54c165ca6b6e57b9f333059a84c2188dd591Ted Kremenek bpb.bkbs = x; 545241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek } else if (bpb.bkbs != MAXU16 && bpb.bkbs == bpb.infs) 546bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek errx(1, "backup sector would overwrite info sector"); 547bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek if (bpb.bkbs != MAXU16 && x <= bpb.bkbs) 548bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek x = bpb.bkbs + 1; 549bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek } 550bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose 55175eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks extra_res = 0; 55275eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks set_res = !bpb.res; 55375eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks set_spf = !bpb.bspf; 55475eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks set_spc = !bpb.spc; 555bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose tempx = x; 556bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose /* 557bd533aa4ff8895c676d4634d0d3de254962569d0Jordy Rose * Attempt to align if opt_A is set. This is done by increasing the number 558882998923889a2fcce9b49696506c499e22cf38fTed Kremenek * of reserved blocks. This can cause other factors to change, which can in 559bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek * turn change the alignment. This should take at most 2 iterations, as 56087d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar * increasing the reserved amount may cause the FAT size to decrease by 1, 561bea2753da897ede723e70bcd17023d050b0603d0Ted Kremenek * requiring another nft reserved blocks. If spc changes, it will 56275eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks * be half of its previous size, and thus will not throw off alignment. 563882998923889a2fcce9b49696506c499e22cf38fTed Kremenek */ 564882998923889a2fcce9b49696506c499e22cf38fTed Kremenek do { 56589f920940de4b414616cabb310c37fa84ed2476aAnna Zaks x = tempx; 56689f920940de4b414616cabb310c37fa84ed2476aAnna Zaks if (set_res) 56789f920940de4b414616cabb310c37fa84ed2476aAnna Zaks bpb.res = (fat == 32 ? MAX(x, MAX(16384 / bpb.bps, 4)) : x) + extra_res; 56889f920940de4b414616cabb310c37fa84ed2476aAnna Zaks else if (bpb.res < x) 569241677a13cc46647a8f5098b3e3239bd9480dca2Ted Kremenek errx(1, "too few reserved sectors"); 5701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (fat != 32 && !bpb.rde) 5715216ad7e095873f19e535ad1efba91973f05d8e8Ted Kremenek bpb.rde = DEFRDE; 57287d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar rds = howmany(bpb.rde, bpb.bps / sizeof(struct de)); 57387d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar if (set_spc) 57487d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar for (bpb.spc = howmany(fat == 16 ? DEFBLK16 : DEFBLK, bpb.bps); 5755216ad7e095873f19e535ad1efba91973f05d8e8Ted Kremenek bpb.spc < MAXSPC && 57687d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar bpb.res + 57787d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar howmany((RESFTE + maxcls(fat)) * (fat / BPN), 57887d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar bpb.bps * NPB) * bpb.nft + 57987d948ecccffea9e9e37d0d053b246e2d6d6c47bPirama Arumuga Nainar rds + 58018c66fdc3c4008d335885695fe36fb5353c5f672Ted Kremenek (u_int64_t)(maxcls(fat) + 1) * bpb.spc <= bpb.bsec; 58175eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks bpb.spc <<= 1); 58275eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks if (fat != 32 && bpb.bspf > MAXU16) 58375eeeb173cd3f6425247d3686c19e49117834fc3Anna Zaks errx(1, "too many sectors/FAT for FAT12/16"); 5845216ad7e095873f19e535ad1efba91973f05d8e8Ted Kremenek x1 = bpb.res + rds; 585cb9657cfba92d5a3009e1b37109e03258c20d327Bill Wendling x = bpb.bspf ? bpb.bspf : 1; 5865216ad7e095873f19e535ad1efba91973f05d8e8Ted Kremenek if (x1 + (u_int64_t)x * bpb.nft > bpb.bsec) 5871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump errx(1, "meta data exceeds file system size"); 5885a4f98ff943e6a501b0fe47ade007c9bbf96cb88Argyrios Kyrtzidis x1 += x * bpb.nft; 5895a4f98ff943e6a501b0fe47ade007c9bbf96cb88Argyrios Kyrtzidis x = (u_int64_t)(bpb.bsec - x1) * bpb.bps * NPB / 590d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek (bpb.spc * bpb.bps * NPB + fat / BPN * bpb.nft); 591d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek x2 = howmany((RESFTE + MIN(x, maxcls(fat))) * (fat / BPN), bpb.bps * NPB); 592e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek if (set_spf) { 5939c378f705405d37f49795d5e915989de774fe11fTed Kremenek if (!bpb.bspf) { 5943352ea914644edb2b56e999c94319ce915d68707Anna Zaks bpb.bspf = x2; 5958800ad4eaa1621f6d23c8264971063b9f8da6a2eTed Kremenek } 5968800ad4eaa1621f6d23c8264971063b9f8da6a2eTed Kremenek x1 += (bpb.bspf - 1) * bpb.nft; 597e0e4ebf6bfca5a71b2344d8a1b748b852509279cTed Kremenek } 5988800ad4eaa1621f6d23c8264971063b9f8da6a2eTed Kremenek if(set_res) { 599d70d0b05e5143be9e952eceb5aad7914b2ecab97Ted Kremenek /* attempt to align root directory */ 600 alignment = (bpb.res + bpb.bspf * bpb.nft) % bpb.spc; 601 extra_res += bpb.spc - alignment; 602 } 603 attempts++; 604 } while(opt_A && alignment != 0 && attempts < 2); 605 if (alignment != 0) 606 warnx("warning: Alignment failed."); 607 608 cls = (bpb.bsec - x1) / bpb.spc; 609 x = (u_int64_t)bpb.bspf * bpb.bps * NPB / (fat / BPN) - RESFTE; 610 if (cls > x) 611 cls = x; 612 if (bpb.bspf < x2) 613 warnx("warning: sectors/FAT limits file system to %u clusters", cls); 614 if (cls < mincls(fat)) 615 errx(1, "%u clusters too few clusters for FAT%u, need %u", cls, fat, mincls(fat)); 616 if (cls > maxcls(fat)) { 617 cls = maxcls(fat); 618 bpb.bsec = x1 + (cls + 1) * bpb.spc - 1; 619 warnx("warning: FAT type limits file system to %u sectors", bpb.bsec); 620 } 621 printf("%s: %u sector%s in %u FAT%u cluster%s (%u bytes/cluster)\n", 622 fname, cls * bpb.spc, cls * bpb.spc == 1 ? "" : "s", cls, fat, 623 cls == 1 ? "" : "s", bpb.bps * bpb.spc); 624 if (!bpb.mid) 625 bpb.mid = !bpb.hid ? 0xf0 : 0xf8; 626 if (fat == 32) 627 bpb.rdcl = RESFTE; 628 if (bpb.hid + bpb.bsec <= MAXU16) { 629 bpb.sec = bpb.bsec; 630 bpb.bsec = 0; 631 } 632 if (fat != 32) { 633 bpb.spf = bpb.bspf; 634 bpb.bspf = 0; 635 } 636 print_bpb(&bpb); 637 if (!opt_N) { 638 gettimeofday(&tv, NULL); 639 now = tv.tv_sec; 640 tm = localtime(&now); 641 if (!(img = malloc(bpb.bps))) 642 err(1, "%u", bpb.bps); 643 dir = bpb.res + (bpb.spf ? bpb.spf : bpb.bspf) * bpb.nft; 644 for (lsn = 0; lsn < dir + (fat == 32 ? bpb.spc : rds); lsn++) { 645 x = lsn; 646 if (opt_B && fat == 32 && bpb.bkbs != MAXU16 && bss <= bpb.bkbs && x >= bpb.bkbs) { 647 x -= bpb.bkbs; 648 if (!x && lseek(fd1, opt_ofs, SEEK_SET)) 649 err(1, "%s", bname); 650 } 651 if (opt_B && x < bss) { 652 if ((n = read(fd1, img, bpb.bps)) == -1) 653 err(1, "%s", bname); 654 if ((unsigned)n != bpb.bps) 655 errx(1, "%s: can't read sector %u", bname, x); 656 } else 657 memset(img, 0, bpb.bps); 658 if (!lsn || (fat == 32 && bpb.bkbs != MAXU16 && lsn == bpb.bkbs)) { 659 x1 = sizeof(struct bs); 660 bsbpb = (struct bsbpb *)(img + x1); 661 mk2(bsbpb->bps, bpb.bps); 662 mk1(bsbpb->spc, bpb.spc); 663 mk2(bsbpb->res, bpb.res); 664 mk1(bsbpb->nft, bpb.nft); 665 mk2(bsbpb->rde, bpb.rde); 666 mk2(bsbpb->sec, bpb.sec); 667 mk1(bsbpb->mid, bpb.mid); 668 mk2(bsbpb->spf, bpb.spf); 669 mk2(bsbpb->spt, bpb.spt); 670 mk2(bsbpb->hds, bpb.hds); 671 mk4(bsbpb->hid, bpb.hid); 672 mk4(bsbpb->bsec, bpb.bsec); 673 x1 += sizeof(struct bsbpb); 674 if (fat == 32) { 675 bsxbpb = (struct bsxbpb *)(img + x1); 676 mk4(bsxbpb->bspf, bpb.bspf); 677 mk2(bsxbpb->xflg, 0); 678 mk2(bsxbpb->vers, 0); 679 mk4(bsxbpb->rdcl, bpb.rdcl); 680 mk2(bsxbpb->infs, bpb.infs); 681 mk2(bsxbpb->bkbs, bpb.bkbs); 682 x1 += sizeof(struct bsxbpb); 683 } 684 bsx = (struct bsx *)(img + x1); 685 mk1(bsx->sig, 0x29); 686 if (Iflag) 687 x = opt_I; 688 else 689 x = (((u_int)(1 + tm->tm_mon) << 8 | 690 (u_int)tm->tm_mday) + 691 ((u_int)tm->tm_sec << 8 | 692 (u_int)(tv.tv_usec / 10))) << 16 | 693 ((u_int)(1900 + tm->tm_year) + 694 ((u_int)tm->tm_hour << 8 | 695 (u_int)tm->tm_min)); 696 mk4(bsx->volid, x); 697 mklabel(bsx->label, opt_L ? opt_L : "NO NAME"); 698 snprintf(buf, sizeof(buf), "FAT%u", fat); 699 setstr(bsx->type, buf, sizeof(bsx->type)); 700 if (!opt_B) { 701 x1 += sizeof(struct bsx); 702 bs = (struct bs *)img; 703 mk1(bs->jmp[0], 0xeb); 704 mk1(bs->jmp[1], x1 - 2); 705 mk1(bs->jmp[2], 0x90); 706 setstr(bs->oem, opt_O ? opt_O : "BSD 4.4", 707 sizeof(bs->oem)); 708 memcpy(img + x1, bootcode, sizeof(bootcode)); 709 mk2(img + MINBPS - 2, DOSMAGIC); 710 } 711 } else if (fat == 32 && bpb.infs != MAXU16 && 712 (lsn == bpb.infs || (bpb.bkbs != MAXU16 && 713 lsn == bpb.bkbs + bpb.infs))) { 714 mk4(img, 0x41615252); 715 mk4(img + MINBPS - 28, 0x61417272); 716 mk4(img + MINBPS - 24, 0xffffffff); 717 mk4(img + MINBPS - 20, bpb.rdcl); 718 mk2(img + MINBPS - 2, DOSMAGIC); 719 } else if (lsn >= bpb.res && lsn < dir && 720 !((lsn - bpb.res) % (bpb.spf ? bpb.spf : bpb.bspf))) { 721 mk1(img[0], bpb.mid); 722 for (x = 1; x < fat * (fat == 32 ? 3 : 2) / 8; x++) 723 mk1(img[x], fat == 32 && x % 4 == 3 ? 0x0f : 0xff); 724 } else if (lsn == dir && opt_L) { 725 de = (struct de *)img; 726 mklabel(de->namext, opt_L); 727 mk1(de->attr, 050); 728 x = (u_int)tm->tm_hour << 11 | 729 (u_int)tm->tm_min << 5 | 730 (u_int)tm->tm_sec >> 1; 731 mk2(de->time, x); 732 x = (u_int)(tm->tm_year - 80) << 9 | 733 (u_int)(tm->tm_mon + 1) << 5 | 734 (u_int)tm->tm_mday; 735 mk2(de->date, x); 736 } 737 if ((n = write(fd, img, bpb.bps)) == -1) 738 err(1, "%s", fname); 739 if ((unsigned)n != bpb.bps) { 740 errx(1, "%s: can't write sector %u", fname, lsn); 741 exit(1); 742 } 743 } 744 } 745 return 0; 746} 747 748/* 749 * Exit with error if file system is mounted. 750 */ 751static void check_mounted(const char *fname, mode_t mode) 752{ 753#ifdef ANDROID 754 warnx("Skipping mount checks"); 755#else 756 struct statfs *mp; 757 const char *s1, *s2; 758 size_t len; 759 int n, r; 760 761 if (!(n = getmntinfo(&mp, MNT_NOWAIT))) 762 err(1, "getmntinfo"); 763 len = strlen(_PATH_DEV); 764 s1 = fname; 765 if (!strncmp(s1, _PATH_DEV, len)) 766 s1 += len; 767 r = S_ISCHR(mode) && s1 != fname && *s1 == 'r'; 768 for (; n--; mp++) { 769 s2 = mp->f_mntfromname; 770 if (!strncmp(s2, _PATH_DEV, len)) 771 s2 += len; 772 if ((r && s2 != mp->f_mntfromname && !strcmp(s1 + 1, s2)) || !strcmp(s1, s2)) 773 errx(1, "%s is mounted on %s", fname, mp->f_mntonname); 774 } 775#endif 776} 777 778/* 779 * Get a standard format. 780 */ 781static void getstdfmt(const char *fmt, struct bpb *bpb) 782{ 783 u_int x, i; 784 785 x = sizeof(stdfmt) / sizeof(stdfmt[0]); 786 for (i = 0; i < x && strcmp(fmt, stdfmt[i].name); i++); 787 if (i == x) 788 errx(1, "%s: unknown standard format", fmt); 789 *bpb = stdfmt[i].bpb; 790} 791 792/* 793 * Get disk slice, partition, and geometry information. 794 */ 795 796#ifdef ANDROID 797static void getdiskinfo(int fd, const char *fname, const char *dtype, 798 __unused int oflag,struct bpb *bpb) 799{ 800 struct hd_geometry geom; 801 u_long block_size; 802 803 if (ioctl(fd, BLKSSZGET, &bpb->bps)) { 804 fprintf(stderr, "Error getting bytes / sector (%s)\n", strerror(errno)); 805 exit(1); 806 } 807 808 ckgeom(fname, bpb->bps, "bytes/sector"); 809 810 if (ioctl(fd, BLKGETSIZE, &block_size)) { 811 fprintf(stderr, "Error getting blocksize (%s)\n", strerror(errno)); 812 exit(1); 813 } 814 815 if (block_size > UINT32_MAX) { 816 fprintf(stderr, "Error blocksize too large: %lu\n", block_size); 817 exit(1); 818 } 819 820 bpb->bsec = (u_int)block_size; 821 822 if (ioctl(fd, HDIO_GETGEO, &geom)) { 823 fprintf(stderr, "Error getting gemoetry (%s) - trying sane values\n", strerror(errno)); 824 geom.heads = 64; 825 geom.sectors = 63; 826 } 827 828 if (!geom.heads) { 829 printf("Bogus heads from kernel - setting sane value\n"); 830 geom.heads = 64; 831 } 832 833 if (!geom.sectors) { 834 printf("Bogus sectors from kernel - setting sane value\n"); 835 geom.sectors = 63; 836 } 837 838 bpb->spt = geom.sectors; 839 ckgeom(fname, bpb->spt, "sectors/track"); 840 841 bpb->hds = geom.heads; 842 ckgeom(fname, bpb->hds, "drive heads"); 843} 844 845#else 846 847static void getdiskinfo(int fd, const char *fname, const char *dtype, 848 __unused int oflag, struct bpb *bpb) 849{ 850 struct disklabel *lp, dlp; 851 struct fd_type type; 852 off_t ms, hs = 0; 853 854 lp = NULL; 855 856 /* If the user specified a disk type, try to use that */ 857 if (dtype != NULL) { 858 lp = getdiskbyname(dtype); 859 } 860 861 /* Maybe it's a floppy drive */ 862 if (lp == NULL) { 863 if (ioctl(fd, DIOCGMEDIASIZE, &ms) == -1) { 864 struct stat st; 865 866 if (fstat(fd, &st)) 867 err(1, "Cannot get disk size"); 868 /* create a fake geometry for a file image */ 869 ms = st.st_size; 870 dlp.d_secsize = 512; 871 dlp.d_nsectors = 63; 872 dlp.d_ntracks = 255; 873 dlp.d_secperunit = ms / dlp.d_secsize; 874 lp = &dlp; 875 } else if (ioctl(fd, FD_GTYPE, &type) != -1) { 876 dlp.d_secsize = 128 << type.secsize; 877 dlp.d_nsectors = type.sectrac; 878 dlp.d_ntracks = type.heads; 879 dlp.d_secperunit = ms / dlp.d_secsize; 880 lp = &dlp; 881 } 882 } 883 884 /* Maybe it's a fixed drive */ 885 if (lp == NULL) { 886 if (ioctl(fd, DIOCGDINFO, &dlp) == -1) { 887 if (bpb->bps == 0 && ioctl(fd, DIOCGSECTORSIZE, &dlp.d_secsize) == -1) 888 errx(1, "Cannot get sector size, %s", strerror(errno)); 889 890 /* XXX Should we use bpb->bps if it's set? */ 891 dlp.d_secperunit = ms / dlp.d_secsize; 892 893 if (bpb->spt == 0 && ioctl(fd, DIOCGFWSECTORS, &dlp.d_nsectors) == -1) { 894 warnx("Cannot get number of sectors per track, %s", strerror(errno)); 895 dlp.d_nsectors = 63; 896 } 897 if (bpb->hds == 0 && ioctl(fd, DIOCGFWHEADS, &dlp.d_ntracks) == -1) { 898 warnx("Cannot get number of heads, %s", strerror(errno)); 899 if (dlp.d_secperunit <= 63*1*1024) 900 dlp.d_ntracks = 1; 901 else if (dlp.d_secperunit <= 63*16*1024) 902 dlp.d_ntracks = 16; 903 else 904 dlp.d_ntracks = 255; 905 } 906 } 907 908 hs = (ms / dlp.d_secsize) - dlp.d_secperunit; 909 lp = &dlp; 910 } 911 912 if (bpb->bps == 0) 913 bpb->bps = ckgeom(fname, lp->d_secsize, "bytes/sector"); 914 if (bpb->spt == 0) 915 bpb->spt = ckgeom(fname, lp->d_nsectors, "sectors/track"); 916 if (bpb->hds == 0) 917 bpb->hds = ckgeom(fname, lp->d_ntracks, "drive heads"); 918 if (bpb->bsec == 0) 919 bpb->bsec = lp->d_secperunit; 920 if (bpb->hid == 0) 921 bpb->hid = hs; 922} 923#endif 924 925/* 926 * Print out BPB values. 927 */ 928static void print_bpb(struct bpb *bpb) 929{ 930 printf("bps=%u spc=%u res=%u nft=%u", bpb->bps, bpb->spc, bpb->res, 931 bpb->nft); 932 if (bpb->rde) 933 printf(" rde=%u", bpb->rde); 934 if (bpb->sec) 935 printf(" sec=%u", bpb->sec); 936 printf(" mid=%#x", bpb->mid); 937 if (bpb->spf) 938 printf(" spf=%u", bpb->spf); 939 printf(" spt=%u hds=%u hid=%u", bpb->spt, bpb->hds, bpb->hid); 940 if (bpb->bsec) 941 printf(" bsec=%u", bpb->bsec); 942 if (!bpb->spf) { 943 printf(" bspf=%u rdcl=%u", bpb->bspf, bpb->rdcl); 944 printf(" infs="); 945 printf(bpb->infs == MAXU16 ? "%#x" : "%u", bpb->infs); 946 printf(" bkbs="); 947 printf(bpb->bkbs == MAXU16 ? "%#x" : "%u", bpb->bkbs); 948 } 949 printf("\n"); 950} 951 952/* 953 * Check a disk geometry value. 954 */ 955static u_int ckgeom(const char *fname, u_int val, const char *msg) 956{ 957 if (!val) 958 errx(1, "%s: no default %s", fname, msg); 959 if (val > MAXU16) 960 errx(1, "%s: illegal %s %d", fname, msg, val); 961 return val; 962} 963 964/* 965 * Convert and check a numeric option argument. 966 */ 967static u_int argtou(const char *arg, u_int lo, u_int hi, const char *msg) 968{ 969 char *s; 970 u_long x; 971 972 errno = 0; 973 x = strtoul(arg, &s, 0); 974 if (errno || !*arg || *s || x < lo || x > hi) 975 errx(1, "%s: bad %s", arg, msg); 976 return x; 977} 978 979/* 980 * Same for off_t, with optional skmgpP suffix 981 */ 982static off_t argtooff(const char *arg, const char *msg) 983{ 984 char *s; 985 off_t x; 986 987 x = strtoll(arg, &s, 0); 988 /* allow at most one extra char */ 989 if (errno || x < 0 || (s[0] && s[1]) ) 990 errx(1, "%s: bad %s", arg, msg); 991 if (*s) { /* the extra char is the multiplier */ 992 switch (*s) { 993 default: 994 errx(1, "%s: bad %s", arg, msg); 995 /* notreached */ 996 997 case 's': /* sector */ 998 case 'S': 999 x <<= 9; /* times 512 */ 1000 break; 1001 1002 case 'k': /* kilobyte */ 1003 case 'K': 1004 x <<= 10; /* times 1024 */ 1005 break; 1006 1007 case 'm': /* megabyte */ 1008 case 'M': 1009 x <<= 20; /* times 1024*1024 */ 1010 break; 1011 1012 case 'g': /* gigabyte */ 1013 case 'G': 1014 x <<= 30; /* times 1024*1024*1024 */ 1015 break; 1016 1017 case 'p': /* partition start */ 1018 case 'P': /* partition start */ 1019 case 'l': /* partition length */ 1020 case 'L': /* partition length */ 1021 errx(1, "%s: not supported yet %s", arg, msg); 1022 /* notreached */ 1023 } 1024 } 1025 return x; 1026} 1027 1028/* 1029 * Check a volume label. 1030 */ 1031static int oklabel(const char *src) 1032{ 1033 int c, i; 1034 1035 for (i = 0; i <= 11; i++) { 1036 c = (u_char)*src++; 1037 if (c < ' ' + !i || strchr("\"*+,./:;<=>?[\\]|", c)) 1038 break; 1039 } 1040 return i && !c; 1041} 1042 1043/* 1044 * Make a volume label. 1045 */ 1046static void mklabel(u_int8_t *dest, const char *src) 1047{ 1048 int c, i; 1049 1050 for (i = 0; i < 11; i++) { 1051 c = *src ? toupper(*src++) : ' '; 1052 *dest++ = !i && c == '\xe5' ? 5 : c; 1053 } 1054} 1055 1056/* 1057 * Copy string, padding with spaces. 1058 */ 1059static void setstr(u_int8_t *dest, const char *src, size_t len) 1060{ 1061 while (len--) 1062 *dest++ = *src ? *src++ : ' '; 1063} 1064 1065/* 1066 * Print usage message. 1067 */ 1068static void usage(void) 1069{ 1070 fprintf(stderr, 1071 "usage: newfs_msdos [ -options ] special [disktype]\n" 1072 "where the options are:\n" 1073 "\t-@ create file system at specified offset\n" 1074 "\t-A Attempt to cluster align root directory\n" 1075 "\t-B get bootstrap from file\n" 1076 "\t-C create image file with specified size\n" 1077 "\t-F FAT type (12, 16, or 32)\n" 1078 "\t-I volume ID\n" 1079 "\t-L volume label\n" 1080 "\t-N don't create file system: just print out parameters\n" 1081 "\t-O OEM string\n" 1082 "\t-S bytes/sector\n" 1083 "\t-a sectors/FAT\n" 1084 "\t-b block size\n" 1085 "\t-c sectors/cluster\n" 1086 "\t-e root directory entries\n" 1087 "\t-f standard format\n" 1088 "\t-h drive heads\n" 1089 "\t-i file system info sector\n" 1090 "\t-k backup boot sector\n" 1091 "\t-m media descriptor\n" 1092 "\t-n number of FATs\n" 1093 "\t-o hidden sectors\n" 1094 "\t-r reserved sectors\n" 1095 "\t-s file system size (sectors)\n" 1096 "\t-u sectors/track\n"); 1097 exit(1); 1098} 1099