2 * Copyright (c) 2018 iXsystems, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
37 #include "cd9660_eltorito.h"
42 system_id_string(u_char system_id)
60 media_type_string(u_char media_type)
65 return ("no emulation");
69 return ("1.44MB FDD");
71 return ("2.88MB FDD");
80 read_sector(FILE *iso, daddr_t sector, char *buffer)
83 fseek(iso, sector * ISO_DEFAULT_BLOCK_SIZE, SEEK_SET);
84 if (fread(buffer, ISO_DEFAULT_BLOCK_SIZE, 1, iso) != 1) {
91 boot_catalog_valid(char *entry)
93 boot_catalog_validation_entry *ve;
94 int16_t checksum, sum;
98 ve = (boot_catalog_validation_entry *)entry;
100 checksum = isonum_721(ve->checksum);
101 cd9660_721(0, ve->checksum);
102 csptr = (unsigned char *)ve;
104 for (i = sum = 0; i < sizeof(*ve); i += 2) {
105 sum += (int16_t)csptr[i];
106 sum += 256 * (int16_t)csptr[i + 1];
108 if (sum + checksum != 0) {
112 cd9660_721(checksum, ve->checksum);
117 dump_section(char *buffer, size_t offset, FILE *outfile, const char *filename,
118 struct outputter *outputter)
120 boot_catalog_section_header *sh;
124 boot_catalog_section_entry *entry;
126 sh = (boot_catalog_section_header *)&buffer[offset];
127 if (outputter->output_section != NULL) {
128 outputter->output_section(outfile, filename, sh);
131 platform_id = sh->platform_id[0];
133 if (outputter->output_entry != NULL) {
134 for (i = 1; i <= (int)sh->num_section_entries[0]; i++) {
135 entry_offset = offset + i * ET_BOOT_ENTRY_SIZE;
137 (boot_catalog_section_entry *)&buffer[entry_offset];
138 outputter->output_entry(outfile, filename, entry,
143 return (1 + (int)sh->num_section_entries[0]);
147 dump_eltorito(FILE *iso, const char *filename, FILE *outfile,
148 struct outputter *outputter)
150 char buffer[ISO_DEFAULT_BLOCK_SIZE], *entry;
151 boot_volume_descriptor *bvd;
152 daddr_t boot_catalog;
156 if (read_sector(iso, 17, buffer) != 0)
157 err(1, "failed to read from image");
159 bvd = (boot_volume_descriptor *)buffer;
160 if (memcmp(bvd->identifier, ISO_VOLUME_DESCRIPTOR_STANDARD_ID, 5) != 0)
161 warnx("%s: not a valid ISO", filename);
162 if (bvd->boot_record_indicator[0] != ISO_VOLUME_DESCRIPTOR_BOOT)
163 warnx("%s: not an El Torito bootable ISO", filename);
164 if (memcmp(bvd->boot_system_identifier, ET_ID, 23) != 0)
165 warnx("%s: not an El Torito bootable ISO", filename);
167 boot_catalog = isonum_731(bvd->boot_catalog_pointer);
169 if (read_sector(iso, boot_catalog, buffer) != 0)
170 err(1, "failed to read from image");
175 if (!boot_catalog_valid(entry))
176 warnx("%s: boot catalog checksum is invalid", filename);
178 if (outputter->output_image != NULL)
179 outputter->output_image(outfile, filename, bvd);
181 offset += ET_BOOT_ENTRY_SIZE;
182 entry = &buffer[offset];
183 if (outputter->output_entry != NULL)
184 outputter->output_entry(outfile, filename,
185 (boot_catalog_section_entry *)entry, 0, true);
187 offset += ET_BOOT_ENTRY_SIZE;
189 while (offset < ISO_DEFAULT_BLOCK_SIZE) {
190 entry = &buffer[offset];
192 if ((uint8_t)entry[0] != ET_SECTION_HEADER_MORE &&
193 (uint8_t)entry[0] != ET_SECTION_HEADER_LAST)
196 entry_count = dump_section(buffer, offset, outfile, filename,
199 offset += entry_count * ET_BOOT_ENTRY_SIZE;
204 usage(const char *progname)
208 path = strdup(progname);
210 fprintf(stderr, "usage: %s [-f format] [-o filename] filename [...]\n",
212 fprintf(stderr, "\tsupported output formats: shell, text\n");
217 main(int argc, char **argv)
221 struct outputter *outputter;
224 outputter = output_text;
226 static struct option longopts[] = {
227 { "format", required_argument, NULL, 'f' },
228 { "output", required_argument, NULL, 'o' },
229 { NULL, 0, NULL, 0 },
232 while ((ch = getopt_long(argc, argv, "f:o:", longopts, NULL)) != -1) {
235 if (strcmp(optarg, "shell") == 0)
236 outputter = output_shell;
237 else if (strcmp(optarg, "text") == 0)
238 outputter = output_text;
243 if (strcmp(optarg, "-") == 0) {
245 } else if ((outfile = fopen(optarg, "w")) == NULL) {
246 err(1, "unable to open %s for output", optarg);
257 for (i = 0; i < argc; i++) {
258 printf("%d %s\n", optind, argv[i]);
259 if (strcmp(argv[i], "-") == 0) {
262 iso = fopen(argv[i], "r");
264 err(1, "could not open %s", argv[1]);
266 dump_eltorito(iso, argv[i], outfile, outputter);