cd9660.c revision 1.2.2.2
1 1.2.2.2 martin /* $NetBSD: cd9660.c,v 1.2.2.2 2024/06/22 10:57:10 martin Exp $ */ 2 1.2.2.2 martin 3 1.2.2.2 martin /*- 4 1.2.2.2 martin * Copyright (c) 2005 Izumi Tsutsui. All rights reserved. 5 1.2.2.2 martin * 6 1.2.2.2 martin * Redistribution and use in source and binary forms, with or without 7 1.2.2.2 martin * modification, are permitted provided that the following conditions 8 1.2.2.2 martin * are met: 9 1.2.2.2 martin * 1. Redistributions of source code must retain the above copyright 10 1.2.2.2 martin * notice, this list of conditions and the following disclaimer. 11 1.2.2.2 martin * 2. Redistributions in binary form must reproduce the above copyright 12 1.2.2.2 martin * notice, this list of conditions and the following disclaimer in the 13 1.2.2.2 martin * documentation and/or other materials provided with the distribution. 14 1.2.2.2 martin * 15 1.2.2.2 martin * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 1.2.2.2 martin * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 1.2.2.2 martin * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 1.2.2.2 martin * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 1.2.2.2 martin * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 1.2.2.2 martin * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 1.2.2.2 martin * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 1.2.2.2 martin * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 1.2.2.2 martin * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 1.2.2.2 martin * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 1.2.2.2 martin */ 26 1.2.2.2 martin 27 1.2.2.2 martin #if HAVE_NBTOOL_CONFIG_H 28 1.2.2.2 martin #include "nbtool_config.h" 29 1.2.2.2 martin #endif 30 1.2.2.2 martin 31 1.2.2.2 martin #include <sys/cdefs.h> 32 1.2.2.2 martin #if defined(__RCSID) && !defined(__lint) 33 1.2.2.2 martin __RCSID("$NetBSD: cd9660.c,v 1.2.2.2 2024/06/22 10:57:10 martin Exp $"); 34 1.2.2.2 martin #endif /* !__lint */ 35 1.2.2.2 martin 36 1.2.2.2 martin #include <sys/param.h> 37 1.2.2.2 martin 38 1.2.2.2 martin #if !HAVE_NBTOOL_CONFIG_H 39 1.2.2.2 martin #include <sys/mount.h> 40 1.2.2.2 martin #endif 41 1.2.2.2 martin #if !HAVE_NBTOOL_CONFIG_H || HAVE_SYS_ENDIAN_H 42 1.2.2.2 martin #include <sys/endian.h> 43 1.2.2.2 martin #endif 44 1.2.2.2 martin 45 1.2.2.2 martin #include <assert.h> 46 1.2.2.2 martin #include <err.h> 47 1.2.2.2 martin #include <errno.h> 48 1.2.2.2 martin #include <fcntl.h> 49 1.2.2.2 martin #include <stdarg.h> 50 1.2.2.2 martin #include <stdio.h> 51 1.2.2.2 martin #include <stdlib.h> 52 1.2.2.2 martin #include <string.h> 53 1.2.2.2 martin #include <unistd.h> 54 1.2.2.2 martin #include <dirent.h> 55 1.2.2.2 martin 56 1.2.2.2 martin #include <fs/cd9660/iso.h> 57 1.2.2.2 martin #include <fs/cd9660/cd9660_extern.h> 58 1.2.2.2 martin 59 1.2.2.2 martin #include "installboot.h" 60 1.2.2.2 martin 61 1.2.2.2 martin #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) 62 1.2.2.2 martin #define MAXLEN 16 63 1.2.2.2 martin 64 1.2.2.2 martin 65 1.2.2.2 martin int 66 1.2.2.2 martin cd9660_match(ib_params *params) 67 1.2.2.2 martin { 68 1.2.2.2 martin int rv, blocksize; 69 1.2.2.2 martin struct iso_primary_descriptor ipd; 70 1.2.2.2 martin 71 1.2.2.2 martin assert(params != NULL); 72 1.2.2.2 martin assert(params->fstype != NULL); 73 1.2.2.2 martin assert(params->fsfd != -1); 74 1.2.2.2 martin 75 1.2.2.2 martin rv = pread(params->fsfd, &ipd, sizeof(ipd), 76 1.2.2.2 martin ISO_DEFAULT_BLOCK_SIZE * 16); 77 1.2.2.2 martin if (rv == -1) { 78 1.2.2.2 martin warn("Reading primary descriptor in `%s'", params->filesystem); 79 1.2.2.2 martin return 0; 80 1.2.2.2 martin } else if (rv != sizeof(ipd)) { 81 1.2.2.2 martin warnx("Reading primary descriptor in `%s': short read", 82 1.2.2.2 martin params->filesystem); 83 1.2.2.2 martin return 0; 84 1.2.2.2 martin } 85 1.2.2.2 martin 86 1.2.2.2 martin if (ipd.type[0] != ISO_VD_PRIMARY || 87 1.2.2.2 martin strncmp(ipd.id, ISO_STANDARD_ID, sizeof(ipd.id)) != 0 || 88 1.2.2.2 martin ipd.version[0] != 1) { 89 1.2.2.2 martin warnx("Filesystem `%s' is not ISO9660 format", 90 1.2.2.2 martin params->filesystem); 91 1.2.2.2 martin return 0; 92 1.2.2.2 martin } 93 1.2.2.2 martin 94 1.2.2.2 martin blocksize = isonum_723((u_char *)ipd.logical_block_size); 95 1.2.2.2 martin if (blocksize != ISO_DEFAULT_BLOCK_SIZE) { 96 1.2.2.2 martin warnx("Invalid blocksize %d in `%s'", 97 1.2.2.2 martin blocksize, params->filesystem); 98 1.2.2.2 martin return 0; 99 1.2.2.2 martin } 100 1.2.2.2 martin 101 1.2.2.2 martin params->fstype->blocksize = blocksize; 102 1.2.2.2 martin params->fstype->needswap = 0; 103 1.2.2.2 martin 104 1.2.2.2 martin return 1; 105 1.2.2.2 martin } 106 1.2.2.2 martin 107 1.2.2.2 martin int 108 1.2.2.2 martin cd9660_findstage2(ib_params *params, uint32_t *maxblk, ib_block *blocks) 109 1.2.2.2 martin { 110 1.2.2.2 martin uint8_t buf[ISO_DEFAULT_BLOCK_SIZE]; 111 1.2.2.2 martin char name[ISO_MAXNAMLEN]; 112 1.2.2.2 martin char *stage2; 113 1.2.2.2 martin off_t loc; 114 1.2.2.2 martin int rv, blocksize, found; 115 1.2.2.2 martin u_int i; 116 1.2.2.2 martin struct iso_primary_descriptor ipd; 117 1.2.2.2 martin struct iso_directory_record *idr; 118 1.2.2.2 martin 119 1.2.2.2 martin assert(params != NULL); 120 1.2.2.2 martin assert(params->stage2 != NULL); 121 1.2.2.2 martin assert(maxblk != NULL); 122 1.2.2.2 martin assert(blocks != NULL); 123 1.2.2.2 martin 124 1.2.2.2 martin #if 0 125 1.2.2.2 martin if (params->flags & IB_STAGE2START) 126 1.2.2.2 martin return hardcode_stage2(params, maxblk, blocks); 127 1.2.2.2 martin #endif 128 1.2.2.2 martin 129 1.2.2.2 martin /* The secondary bootstrap must be clearly in /. */ 130 1.2.2.2 martin strlcpy(name, params->stage2, ISO_MAXNAMLEN); 131 1.2.2.2 martin stage2 = name; 132 1.2.2.2 martin if (stage2[0] == '/') 133 1.2.2.2 martin stage2++; 134 1.2.2.2 martin if (strchr(stage2, '/') != NULL) { 135 1.2.2.2 martin warnx("The secondary bootstrap `%s' must be in / " 136 1.2.2.2 martin "on filesystem `%s'", params->stage2, params->filesystem); 137 1.2.2.2 martin return 0; 138 1.2.2.2 martin } 139 1.2.2.2 martin if (strchr(stage2, '.') == NULL) { 140 1.2.2.2 martin /* 141 1.2.2.2 martin * XXX should fix isofncmp()? 142 1.2.2.2 martin */ 143 1.2.2.2 martin strlcat(name, ".", ISO_MAXNAMLEN); 144 1.2.2.2 martin } 145 1.2.2.2 martin 146 1.2.2.2 martin rv = pread(params->fsfd, &ipd, sizeof(ipd), 147 1.2.2.2 martin ISO_DEFAULT_BLOCK_SIZE * 16); 148 1.2.2.2 martin if (rv == -1) { 149 1.2.2.2 martin warn("Reading primary descriptor in `%s'", params->filesystem); 150 1.2.2.2 martin return 0; 151 1.2.2.2 martin } else if (rv != sizeof(ipd)) { 152 1.2.2.2 martin warnx("Reading primary descriptor in `%s': short read", 153 1.2.2.2 martin params->filesystem); 154 1.2.2.2 martin return 0; 155 1.2.2.2 martin } 156 1.2.2.2 martin blocksize = isonum_723((u_char *)ipd.logical_block_size); 157 1.2.2.2 martin 158 1.2.2.2 martin idr = (void *)ipd.root_directory_record; 159 1.2.2.2 martin loc = (off_t)isonum_733(idr->extent) * blocksize; 160 1.2.2.2 martin rv = pread(params->fsfd, buf, blocksize, loc); 161 1.2.2.2 martin if (rv == -1) { 162 1.2.2.2 martin warn("Reading root directory record in `%s'", 163 1.2.2.2 martin params->filesystem); 164 1.2.2.2 martin return 0; 165 1.2.2.2 martin } else if (rv != sizeof(ipd)) { 166 1.2.2.2 martin warnx("Reading root directory record in `%s': short read", 167 1.2.2.2 martin params->filesystem); 168 1.2.2.2 martin return 0; 169 1.2.2.2 martin } 170 1.2.2.2 martin 171 1.2.2.2 martin found = 0; 172 1.2.2.2 martin for (i = 0; i < blocksize - sizeof(struct iso_directory_record); 173 1.2.2.2 martin i += (u_char)idr->length[0]) { 174 1.2.2.2 martin idr = (void *)&buf[i]; 175 1.2.2.2 martin 176 1.2.2.2 martin #ifdef DEBUG 177 1.2.2.2 martin printf("i = %d, idr->length[0] = %3d\n", 178 1.2.2.2 martin i, (u_char)idr->length[0]); 179 1.2.2.2 martin #endif 180 1.2.2.2 martin /* check end of entries */ 181 1.2.2.2 martin if (idr->length[0] == 0) { 182 1.2.2.2 martin #ifdef DEBUG 183 1.2.2.2 martin printf("end of entries\n"); 184 1.2.2.2 martin #endif 185 1.2.2.2 martin break; 186 1.2.2.2 martin } 187 1.2.2.2 martin 188 1.2.2.2 martin if (idr->flags[0] & 2) { 189 1.2.2.2 martin /* skip directory entries */ 190 1.2.2.2 martin #ifdef DEBUG 191 1.2.2.2 martin printf("skip directory entry\n"); 192 1.2.2.2 martin #endif 193 1.2.2.2 martin continue; 194 1.2.2.2 martin } 195 1.2.2.2 martin if (idr->name_len[0] == 1 && 196 1.2.2.2 martin (idr->name[0] == 0 || idr->name[0] == 1)) { 197 1.2.2.2 martin /* skip "." and ".." */ 198 1.2.2.2 martin #ifdef DEBUG 199 1.2.2.2 martin printf("skip dot dot\n"); 200 1.2.2.2 martin #endif 201 1.2.2.2 martin continue; 202 1.2.2.2 martin } 203 1.2.2.2 martin #ifdef DEBUG 204 1.2.2.2 martin { 205 1.2.2.2 martin int j; 206 1.2.2.2 martin 207 1.2.2.2 martin printf("filename:"); 208 1.2.2.2 martin for (j = 0; j < isonum_711(idr->name_len); j++) 209 1.2.2.2 martin printf("%c", idr->name[j]); 210 1.2.2.2 martin printf("\n"); 211 1.2.2.2 martin } 212 1.2.2.2 martin #endif 213 1.2.2.2 martin if (isofncmp((u_char *)stage2, strlen(stage2), 214 1.2.2.2 martin (u_char *)idr->name, 215 1.2.2.2 martin isonum_711((u_char *)idr->name_len), 0) == 0) { 216 1.2.2.2 martin found = 1; 217 1.2.2.2 martin /* ISO filesystem always has contiguous file blocks */ 218 1.2.2.2 martin blocks[0].block = (int64_t)isonum_733(idr->extent); 219 1.2.2.2 martin blocks[0].blocksize = 220 1.2.2.2 martin roundup(isonum_733(idr->size), blocksize); 221 1.2.2.2 martin *maxblk = 1; 222 1.2.2.2 martin #ifdef DEBUG 223 1.2.2.2 martin printf("block = %ld, blocksize = %ld\n", 224 1.2.2.2 martin (long)blocks[0].block, blocks[0].blocksize); 225 1.2.2.2 martin #endif 226 1.2.2.2 martin break; 227 1.2.2.2 martin } 228 1.2.2.2 martin } 229 1.2.2.2 martin 230 1.2.2.2 martin if (found == 0) { 231 1.2.2.2 martin warnx("Can't find secondary bootstrap `%s' in filesystem `%s'", 232 1.2.2.2 martin params->stage2, params->filesystem); 233 1.2.2.2 martin return 0; 234 1.2.2.2 martin } 235 1.2.2.2 martin 236 1.2.2.2 martin return 1; 237 1.2.2.2 martin } 238
Indexes created Fri Oct 03 17:10:05 GMT 2025