1 /* $OpenBSD: msdos.c,v 1.12 2021/09/01 15:19:00 deraadt Exp $ */ 2 /* $NetBSD: msdos.c,v 1.16 2016/01/30 09:59:27 mlelstv Exp $ */ 3 4 /*- 5 * Copyright (c) 2013 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Christos Zoulas. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <assert.h> 34 #include <fcntl.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 39 #include "ffs/buf.h" 40 #include "msdos/denode.h" 41 #include "makefs.h" 42 #include "msdos.h" 43 #include "msdos/mkfs_msdos.h" 44 45 static int msdos_populate_dir(const char *, struct denode *, fsnode *, 46 fsnode *, fsinfo_t *); 47 48 void 49 msdos_prep_opts(fsinfo_t *fsopts) 50 { 51 struct msdos_options *msdos_opt = ecalloc(1, sizeof(*msdos_opt)); 52 const option_t msdos_options[] = { 53 #define AOPT(_type, _name, _min) { \ 54 .name = # _name, \ 55 .type = _min == -1 ? OPT_STRPTR : \ 56 (_min == -2 ? OPT_BOOL : \ 57 (sizeof(_type) == 1 ? OPT_INT8 : \ 58 (sizeof(_type) == 2 ? OPT_INT16 : \ 59 (sizeof(_type) == 4 ? OPT_INT32 : OPT_INT64)))), \ 60 .value = &msdos_opt->_name, \ 61 .minimum = _min, \ 62 .maximum = sizeof(_type) == 1 ? 0xff : \ 63 (sizeof(_type) == 2 ? 0xffff : \ 64 (sizeof(_type) == 4 ? 0xffffffff : 0x7fffffffffffffffLL)), \ 65 }, 66 ALLOPTS 67 #undef AOPT 68 { .name = NULL } 69 }; 70 71 fsopts->fs_specific = msdos_opt; 72 fsopts->fs_options = copy_opts(msdos_options); 73 } 74 75 void 76 msdos_cleanup_opts(fsinfo_t *fsopts) 77 { 78 free(fsopts->fs_specific); 79 free(fsopts->fs_options); 80 } 81 82 int 83 msdos_parse_opts(const char *option, fsinfo_t *fsopts) 84 { 85 struct msdos_options *msdos_opt = fsopts->fs_specific; 86 option_t *msdos_options = fsopts->fs_options; 87 88 int rv; 89 90 assert(option != NULL); 91 assert(fsopts != NULL); 92 assert(msdos_opt != NULL); 93 94 rv = set_option(msdos_options, option, NULL, 0); 95 if (rv == -1) 96 return rv; 97 98 if (strcmp(msdos_options[rv].name, "volume_id") == 0) 99 msdos_opt->volume_id_set = 1; 100 else if (strcmp(msdos_options[rv].name, "media_descriptor") == 0) 101 msdos_opt->media_descriptor_set = 1; 102 else if (strcmp(msdos_options[rv].name, "hidden_sectors") == 0) 103 msdos_opt->hidden_sectors_set = 1; 104 return 1; 105 } 106 107 108 void 109 msdos_makefs(const char *image, const char *dir, fsnode *root, fsinfo_t *fsopts) 110 { 111 struct msdos_options *msdos_opt = fsopts->fs_specific; 112 struct mkfsvnode vp, rootvp; 113 struct msdosfsmount *pmp; 114 115 assert(image != NULL); 116 assert(dir != NULL); 117 assert(root != NULL); 118 assert(fsopts != NULL); 119 120 /* 121 * XXX: pick up other options from the msdos specific ones? 122 * Is minsize right here? 123 */ 124 msdos_opt->create_size = MAX(msdos_opt->create_size, 125 fsopts->minsize); 126 msdos_opt->offset = fsopts->offset; 127 if (msdos_opt->bytes_per_sector == 0) { 128 if (fsopts->sectorsize == -1) 129 fsopts->sectorsize = 512; 130 msdos_opt->bytes_per_sector = fsopts->sectorsize; 131 } else if (fsopts->sectorsize == -1) { 132 fsopts->sectorsize = msdos_opt->bytes_per_sector; 133 } else if (fsopts->sectorsize != msdos_opt->bytes_per_sector) { 134 err(1, "inconsistent sectorsize -S %u" 135 "!= -o bytes_per_sector %u", 136 fsopts->sectorsize, msdos_opt->bytes_per_sector); 137 } 138 139 /* create image */ 140 printf("Creating `%s'\n", image); 141 if (mkfs_msdos(image, NULL, msdos_opt) == -1) 142 return; 143 144 fsopts->fd = open(image, O_RDWR); 145 vp.fs = fsopts; 146 147 if ((pmp = msdosfs_mount(&vp, 0)) == NULL) 148 err(1, "msdosfs_mount"); 149 150 if (msdosfs_root(pmp, &rootvp) != 0) 151 err(1, "msdosfs_root"); 152 153 /* populate image */ 154 printf("Populating `%s'\n", image); 155 if (msdos_populate_dir(dir, VTODE(&rootvp), root, root, fsopts) == -1) 156 errx(1, "Image file `%s' not created.", image); 157 158 bcleanup(); 159 160 printf("Image `%s' complete\n", image); 161 } 162 163 static int 164 msdos_populate_dir(const char *path, struct denode *dir, fsnode *root, 165 fsnode *parent, fsinfo_t *fsopts) 166 { 167 fsnode *cur; 168 char pbuf[MAXPATHLEN]; 169 170 assert(dir != NULL); 171 assert(root != NULL); 172 assert(fsopts != NULL); 173 174 for (cur = root->next; cur != NULL; cur = cur->next) { 175 if ((size_t)snprintf(pbuf, sizeof(pbuf), "%s/%s", path, 176 cur->name) >= sizeof(pbuf)) { 177 warnx("path %s too long", pbuf); 178 return -1; 179 } 180 181 if ((cur->inode->flags & FI_ALLOCATED) == 0) { 182 cur->inode->flags |= FI_ALLOCATED; 183 if (cur != root) { 184 fsopts->curinode++; 185 cur->inode->ino = fsopts->curinode; 186 cur->parent = parent; 187 } 188 } 189 190 if (cur->inode->flags & FI_WRITTEN) { 191 continue; // hard link 192 } 193 cur->inode->flags |= FI_WRITTEN; 194 195 if (cur->child) { 196 struct denode *de; 197 if ((de = msdosfs_mkdire(pbuf, dir, cur)) == NULL) { 198 warn("msdosfs_mkdire %s", pbuf); 199 return -1; 200 } 201 if (msdos_populate_dir(pbuf, de, cur->child, cur, 202 fsopts) == -1) { 203 warn("msdos_populate_dir %s", pbuf); 204 return -1; 205 } 206 continue; 207 } else if (!S_ISREG(cur->type)) { 208 warnx("skipping non-regular file %s/%s", cur->path, 209 cur->name); 210 continue; 211 } 212 if (msdosfs_mkfile(pbuf, dir, cur) == NULL) { 213 warn("msdosfs_mkfile %s", pbuf); 214 return -1; 215 } 216 } 217 return 0; 218 } 219