Bug Summary

File:src/usr.sbin/makefs/cd9660/cd9660_eltorito.c
Warning:line 139, column 3
Value stored to 'mode_msg' is never read

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name cd9660_eltorito.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/usr.sbin/makefs/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/usr.sbin/makefs -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/usr.sbin/makefs/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/usr.sbin/makefs/cd9660/cd9660_eltorito.c
1/* $OpenBSD: cd9660_eltorito.c,v 1.15 2021/07/12 15:09:21 beck Exp $ */
2/* $NetBSD: cd9660_eltorito.c,v 1.20 2013/01/28 21:03:28 christos Exp $ */
3
4/*
5 * Copyright (c) 2005 Daniel Watt, Walter Deignan, Ryan Gabrys, Alan
6 * Perez-Rathke and Ram Vedam. All rights reserved.
7 *
8 * This code was written by Daniel Watt, Walter Deignan, Ryan Gabrys,
9 * Alan Perez-Rathke and Ram Vedam.
10 *
11 * Redistribution and use in source and binary forms, with or
12 * without modification, are permitted provided that the following
13 * conditions 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
17 * copyright notice, this list of conditions and the following
18 * disclaimer in the documentation and/or other materials provided
19 * with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY DANIEL WATT, WALTER DEIGNAN, RYAN
22 * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 * DISCLAIMED. IN NO EVENT SHALL DANIEL WATT, WALTER DEIGNAN, RYAN
26 * GABRYS, ALAN PEREZ-RATHKE AND RAM VEDAM BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
29 * USE,DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
30 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
33 * OF SUCH DAMAGE.
34 */
35
36
37#include "cd9660.h"
38#include "cd9660_eltorito.h"
39#include <inttypes.h>
40
41/*
42 * Partition Status Information from Apple Tech Note 1189
43 */
44#define APPLE_PS_VALID0x00000001 0x00000001 /* Entry is valid */
45#define APPLE_PS_ALLOCATED0x00000002 0x00000002 /* Entry is allocated */
46#define APPLE_PS_READABLE0x00000010 0x00000010 /* Entry is readable */
47#define APPLE_PS_WRITABLE0x00000020 0x00000020 /* Entry is writable */
48
49#ifdef DEBUG
50#define ELTORITO_DPRINTF(__x) printf __x
51#else
52#define ELTORITO_DPRINTF(__x)
53#endif
54
55static struct boot_catalog_entry *cd9660_init_boot_catalog_entry(void);
56static struct boot_catalog_entry *cd9660_boot_setup_validation_entry(char);
57static struct boot_catalog_entry *cd9660_boot_setup_default_entry(
58 struct cd9660_boot_image *);
59static struct boot_catalog_entry *cd9660_boot_setup_section_head(char);
60static struct boot_catalog_entry *cd9660_boot_setup_validation_entry(char);
61#if 0
62static u_char cd9660_boot_get_system_type(struct cd9660_boot_image *);
63#endif
64
65int
66cd9660_add_boot_disk(iso9660_disk *diskStructure, const char *boot_info)
67{
68 struct stat stbuf;
69 const char *mode_msg;
70 char *temp;
71 char *sysname;
72 char *filename;
73 struct cd9660_boot_image *new_image, *tmp_image;
74
75 assert(boot_info != NULL)((boot_info != ((void *)0)) ? (void)0 : __assert2("/usr/src/usr.sbin/makefs/cd9660/cd9660_eltorito.c"
, 75, __func__, "boot_info != NULL"));
76
77 if (*boot_info == '\0') {
78 warnx("Error: Boot disk information must be in the "
79 "format 'system;filename'");
80 return 0;
81 }
82
83 /* First decode the boot information */
84 temp = estrdup(boot_info);
85
86 sysname = temp;
87 filename = strchr(sysname, ';');
88 if (filename == NULL((void *)0)) {
89 warnx("supply boot disk information in the format "
90 "'system;filename'");
91 free(temp);
92 return 0;
93 }
94
95 *filename++ = '\0';
96
97 new_image = ecalloc(1, sizeof(*new_image));
98 new_image->loadSegment = 0; /* default for now */
99
100 /* Decode System */
101 if (strcmp(sysname, "i386") == 0)
102 new_image->system = ET_SYS_X860;
103 else if (strcmp(sysname, "powerpc") == 0)
104 new_image->system = ET_SYS_PPC1;
105 else if (strcmp(sysname, "macppc") == 0)
106 new_image->system = ET_SYS_MAC2;
107 else if (strcmp(sysname, "efi") == 0)
108 new_image->system = ET_SYS_EFI0xef;
109 else {
110 warnx("boot disk system must be "
111 "i386, macppc, powerpc, or efi");
112 free(temp);
113 free(new_image);
114 return 0;
115 }
116
117
118 new_image->filename = estrdup(filename);
119
120 free(temp);
121
122 if (unveil(new_image->filename, "r") == -1)
123 err(1, "unveil %s", new_image->filename);
124 /* Get information about the file */
125 if (lstat(new_image->filename, &stbuf) == -1)
126 err(1, "%s: lstat(\"%s\")", __func__, new_image->filename);
127
128 switch (stbuf.st_size) {
129 case 1440 * 1024:
130 new_image->targetMode = ET_MEDIA_144FDD2;
131 mode_msg = "Assigned boot image to 1.44 emulation mode";
132 break;
133 case 1200 * 1024:
134 new_image->targetMode = ET_MEDIA_12FDD1;
135 mode_msg = "Assigned boot image to 1.2 emulation mode";
136 break;
137 case 2880 * 1024:
138 new_image->targetMode = ET_MEDIA_288FDD3;
139 mode_msg = "Assigned boot image to 2.88 emulation mode";
Value stored to 'mode_msg' is never read
140 break;
141 default:
142 new_image->targetMode = ET_MEDIA_NOEM0;
143 mode_msg = "Assigned boot image to no emulation mode";
144 break;
145 }
146
147 new_image->size = stbuf.st_size;
148 new_image->num_sectors =
149 howmany(new_image->size, diskStructure->sectorSize)(((new_image->size) + ((diskStructure->sectorSize) - 1)
) / (diskStructure->sectorSize)) *
150 howmany(diskStructure->sectorSize, 512)(((diskStructure->sectorSize) + ((512) - 1)) / (512));
151 new_image->sector = -1;
152 /* Bootable by default */
153 new_image->bootable = ET_BOOTABLE0x88;
154 /* Add boot disk */
155
156 /* Group images for the same platform together. */
157 TAILQ_FOREACH(tmp_image, &diskStructure->boot_images, image_list)for((tmp_image) = ((&diskStructure->boot_images)->tqh_first
); (tmp_image) != ((void *)0); (tmp_image) = ((tmp_image)->
image_list.tqe_next)) {
158 if (tmp_image->system != new_image->system)
159 break;
160 }
161
162 if (tmp_image == NULL((void *)0))
163 TAILQ_INSERT_HEAD(&diskStructure->boot_images, new_image,do { if (((new_image)->image_list.tqe_next = (&diskStructure
->boot_images)->tqh_first) != ((void *)0)) (&diskStructure
->boot_images)->tqh_first->image_list.tqe_prev = &
(new_image)->image_list.tqe_next; else (&diskStructure
->boot_images)->tqh_last = &(new_image)->image_list
.tqe_next; (&diskStructure->boot_images)->tqh_first
= (new_image); (new_image)->image_list.tqe_prev = &(&
diskStructure->boot_images)->tqh_first; } while (0)
164 image_list)do { if (((new_image)->image_list.tqe_next = (&diskStructure
->boot_images)->tqh_first) != ((void *)0)) (&diskStructure
->boot_images)->tqh_first->image_list.tqe_prev = &
(new_image)->image_list.tqe_next; else (&diskStructure
->boot_images)->tqh_last = &(new_image)->image_list
.tqe_next; (&diskStructure->boot_images)->tqh_first
= (new_image); (new_image)->image_list.tqe_prev = &(&
diskStructure->boot_images)->tqh_first; } while (0);
165 else
166 TAILQ_INSERT_AFTER(&diskStructure->boot_images, tmp_image,do { if (((new_image)->image_list.tqe_next = (tmp_image)->
image_list.tqe_next) != ((void *)0)) (new_image)->image_list
.tqe_next->image_list.tqe_prev = &(new_image)->image_list
.tqe_next; else (&diskStructure->boot_images)->tqh_last
= &(new_image)->image_list.tqe_next; (tmp_image)->
image_list.tqe_next = (new_image); (new_image)->image_list
.tqe_prev = &(tmp_image)->image_list.tqe_next; } while
(0)
167 new_image, image_list)do { if (((new_image)->image_list.tqe_next = (tmp_image)->
image_list.tqe_next) != ((void *)0)) (new_image)->image_list
.tqe_next->image_list.tqe_prev = &(new_image)->image_list
.tqe_next; else (&diskStructure->boot_images)->tqh_last
= &(new_image)->image_list.tqe_next; (tmp_image)->
image_list.tqe_next = (new_image); (new_image)->image_list
.tqe_prev = &(tmp_image)->image_list.tqe_next; } while
(0);
168
169 new_image->serialno = diskStructure->image_serialno++;
170
171 /* TODO : Need to do anything about the boot image in the tree? */
172 diskStructure->is_bootable = 1;
173
174 return 1;
175}
176
177int
178cd9660_eltorito_add_boot_option(iso9660_disk *diskStructure,
179 const char *option_string, const char *value)
180{
181 char *eptr;
182 struct cd9660_boot_image *image;
183
184 assert(option_string != NULL)((option_string != ((void *)0)) ? (void)0 : __assert2("/usr/src/usr.sbin/makefs/cd9660/cd9660_eltorito.c"
, 184, __func__, "option_string != NULL"));
185
186 /* Find the last image added */
187 TAILQ_FOREACH(image, &diskStructure->boot_images, image_list)for((image) = ((&diskStructure->boot_images)->tqh_first
); (image) != ((void *)0); (image) = ((image)->image_list.
tqe_next)) {
188 if (image->serialno + 1 == diskStructure->image_serialno)
189 break;
190 }
191 if (image == NULL((void *)0))
192 errx(1, "Attempted to add boot option, "
193 "but no boot images have been specified");
194
195 if (strcmp(option_string, "no-emul-boot") == 0) {
196 image->targetMode = ET_MEDIA_NOEM0;
197 } else if (strcmp(option_string, "no-boot") == 0) {
198 image->bootable = ET_NOT_BOOTABLE0;
199 } else if (strcmp(option_string, "hard-disk-boot") == 0) {
200 image->targetMode = ET_MEDIA_HDD4;
201 } else if (strcmp(option_string, "boot-load-segment") == 0) {
202 image->loadSegment = strtoul(value, &eptr, 16);
203 if (eptr == value || *eptr != '\0' || errno(*__errno()) != ERANGE34) {
204 warn("%s: strtoul", __func__);
205 return 0;
206 }
207 } else {
208 return 0;
209 }
210 return 1;
211}
212
213static struct boot_catalog_entry *
214cd9660_init_boot_catalog_entry(void)
215{
216 return ecalloc(1, sizeof(struct boot_catalog_entry));
217}
218
219static struct boot_catalog_entry *
220cd9660_boot_setup_validation_entry(char sys)
221{
222 struct boot_catalog_entry *entry;
223 boot_catalog_validation_entry *ve;
224 int16_t checksum;
225 unsigned char *csptr;
226 size_t i;
227 entry = cd9660_init_boot_catalog_entry();
228
229 entry->entry_type = ET_ENTRY_VE1;
230 ve = &entry->entry_data.VE;
231
232 ve->header_id[0] = 1;
233 ve->platform_id[0] = sys;
234 ve->key[0] = 0x55;
235 ve->key[1] = 0xAA;
236
237 /* Calculate checksum */
238 checksum = 0;
239 cd9660_721(0, ve->checksum);
240 csptr = (unsigned char*)ve;
241 for (i = 0; i < sizeof(*ve); i += 2) {
242 checksum += (int16_t)csptr[i];
243 checksum += 256 * (int16_t)csptr[i + 1];
244 }
245 checksum = -checksum;
246 cd9660_721(checksum, ve->checksum);
247
248 ELTORITO_DPRINTF(("%s: header_id %d, platform_id %d, key[0] %d, key[1] %d, "
249 "checksum %04x\n", __func__, ve->header_id[0], ve->platform_id[0],
250 ve->key[0], ve->key[1], checksum));
251 return entry;
252}
253
254static struct boot_catalog_entry *
255cd9660_boot_setup_default_entry(struct cd9660_boot_image *disk)
256{
257 struct boot_catalog_entry *default_entry;
258 boot_catalog_initial_entry *ie;
259
260 default_entry = cd9660_init_boot_catalog_entry();
261 if (default_entry == NULL((void *)0))
262 return NULL((void *)0);
263
264 default_entry->entry_type = ET_ENTRY_IE2;
265 ie = &default_entry->entry_data.IE;
266
267 ie->boot_indicator[0] = disk->bootable;
268 ie->media_type[0] = disk->targetMode;
269 cd9660_721(disk->loadSegment, ie->load_segment);
270 ie->system_type[0] = disk->system;
271 cd9660_721(disk->num_sectors, ie->sector_count);
272 cd9660_731(disk->sector, ie->load_rba);
273
274 ELTORITO_DPRINTF(("%s: boot indicator %d, media type %d, "
275 "load segment %04x, system type %d, sector count %d, "
276 "load rba %d\n", __func__, ie->boot_indicator[0],
277 ie->media_type[0], disk->loadSegment, ie->system_type[0],
278 disk->num_sectors, disk->sector));
279 return default_entry;
280}
281
282static struct boot_catalog_entry *
283cd9660_boot_setup_section_head(char platform)
284{
285 struct boot_catalog_entry *entry;
286 boot_catalog_section_header *sh;
287
288 entry = cd9660_init_boot_catalog_entry();
289 if (entry == NULL((void *)0))
290 return NULL((void *)0);
291
292 entry->entry_type = ET_ENTRY_SH3;
293 sh = &entry->entry_data.SH;
294 /* More by default. The last one will manually be set to 0x91 */
295 sh->header_indicator[0] = ET_SECTION_HEADER_MORE0x90;
296 sh->platform_id[0] = platform;
297 sh->num_section_entries[0] = 0;
298 return entry;
299}
300
301static struct boot_catalog_entry *
302cd9660_boot_setup_section_entry(struct cd9660_boot_image *disk)
303{
304 struct boot_catalog_entry *entry;
305 boot_catalog_section_entry *se;
306 if ((entry = cd9660_init_boot_catalog_entry()) == NULL((void *)0))
307 return NULL((void *)0);
308
309 entry->entry_type = ET_ENTRY_SE4;
310 se = &entry->entry_data.SE;
311
312 se->boot_indicator[0] = ET_BOOTABLE0x88;
313 se->media_type[0] = disk->targetMode;
314 cd9660_721(disk->loadSegment, se->load_segment);
315 cd9660_721(disk->num_sectors, se->sector_count);
316 cd9660_731(disk->sector, se->load_rba);
317 return entry;
318}
319
320#if 0
321static u_char
322cd9660_boot_get_system_type(struct cd9660_boot_image *disk)
323{
324 /*
325 For hard drive booting, we need to examine the MBR to figure
326 out what the partition type is
327 */
328 return 0;
329}
330#endif
331
332/*
333 * Set up the BVD, Boot catalog, and the boot entries, but do no writing
334 */
335int
336cd9660_setup_boot(iso9660_disk *diskStructure, int first_sector)
337{
338 int sector;
339 int used_sectors;
340 int num_entries = 0;
341 int catalog_sectors;
342 struct boot_catalog_entry *x86_head, *mac_head, *ppc_head, *efi_head,
343 *valid_entry, *default_entry, *temp, *head, **headp, *next;
344 struct cd9660_boot_image *tmp_disk;
345
346 headp = NULL((void *)0);
347 x86_head = mac_head = ppc_head = efi_head = NULL((void *)0);
348
349 /* If there are no boot disks, don't bother building boot information */
350 if (TAILQ_EMPTY(&diskStructure->boot_images)(((&diskStructure->boot_images)->tqh_first) == ((void
*)0)))
351 return 0;
352
353 /* Point to catalog: For now assume it consumes one sector */
354 ELTORITO_DPRINTF(("Boot catalog will go in sector %d\n", first_sector));
355 diskStructure->boot_catalog_sector = first_sector;
356 cd9660_bothendian_dword(first_sector,
357 diskStructure->boot_descriptor->boot_catalog_pointer);
358
359 /* Step 1: Generate boot catalog */
360 /* Step 1a: Validation entry */
361 valid_entry = cd9660_boot_setup_validation_entry(ET_SYS_X860);
362 if (valid_entry == NULL((void *)0))
363 return -1;
364
365 /*
366 * Count how many boot images there are,
367 * and how many sectors they consume.
368 */
369 num_entries = 1;
370 used_sectors = 0;
371
372 TAILQ_FOREACH(tmp_disk, &diskStructure->boot_images, image_list)for((tmp_disk) = ((&diskStructure->boot_images)->tqh_first
); (tmp_disk) != ((void *)0); (tmp_disk) = ((tmp_disk)->image_list
.tqe_next)) {
373 used_sectors += tmp_disk->num_sectors;
374
375 /* One default entry per image */
376 num_entries++;
377 }
378 catalog_sectors = howmany(num_entries * 0x20, diskStructure->sectorSize)(((num_entries * 0x20) + ((diskStructure->sectorSize) - 1)
) / (diskStructure->sectorSize));
379 used_sectors += catalog_sectors;
380
381 /* Populate sector numbers */
382 sector = first_sector + catalog_sectors;
383 TAILQ_FOREACH(tmp_disk, &diskStructure->boot_images, image_list)for((tmp_disk) = ((&diskStructure->boot_images)->tqh_first
); (tmp_disk) != ((void *)0); (tmp_disk) = ((tmp_disk)->image_list
.tqe_next)) {
384 tmp_disk->sector = sector;
385 sector += tmp_disk->num_sectors;
386 }
387
388 LIST_INSERT_HEAD(&diskStructure->boot_entries, valid_entry, ll_struct)do { if (((valid_entry)->ll_struct.le_next = (&diskStructure
->boot_entries)->lh_first) != ((void *)0)) (&diskStructure
->boot_entries)->lh_first->ll_struct.le_prev = &
(valid_entry)->ll_struct.le_next; (&diskStructure->
boot_entries)->lh_first = (valid_entry); (valid_entry)->
ll_struct.le_prev = &(&diskStructure->boot_entries
)->lh_first; } while (0);
389
390 /* Step 1b: Initial/default entry */
391 /* TODO : PARAM */
392 tmp_disk = TAILQ_FIRST(&diskStructure->boot_images)((&diskStructure->boot_images)->tqh_first);
393 default_entry = cd9660_boot_setup_default_entry(tmp_disk);
394 if (default_entry == NULL((void *)0)) {
395 warnx("Error: memory allocation failed in cd9660_setup_boot");
396 return -1;
397 }
398
399 LIST_INSERT_AFTER(valid_entry, default_entry, ll_struct)do { if (((default_entry)->ll_struct.le_next = (valid_entry
)->ll_struct.le_next) != ((void *)0)) (valid_entry)->ll_struct
.le_next->ll_struct.le_prev = &(default_entry)->ll_struct
.le_next; (valid_entry)->ll_struct.le_next = (default_entry
); (default_entry)->ll_struct.le_prev = &(valid_entry)
->ll_struct.le_next; } while (0);
400
401 /* Todo: multiple default entries? */
402
403 tmp_disk = TAILQ_NEXT(tmp_disk, image_list)((tmp_disk)->image_list.tqe_next);
404
405 temp = default_entry;
406
407 /* If multiple boot images are given : */
408 while (tmp_disk != NULL((void *)0)) {
409 /* Step 2: Section header */
410 switch (tmp_disk->system) {
411 case ET_SYS_X860:
412 headp = &x86_head;
413 break;
414 case ET_SYS_PPC1:
415 headp = &ppc_head;
416 break;
417 case ET_SYS_MAC2:
418 headp = &mac_head;
419 break;
420 case ET_SYS_EFI0xef:
421 headp = &efi_head;
422 break;
423 default:
424 warnx("%s: internal error: unknown system type",
425 __func__);
426 return -1;
427 }
428
429 if (*headp == NULL((void *)0)) {
430 head =
431 cd9660_boot_setup_section_head(tmp_disk->system);
432 if (head == NULL((void *)0)) {
433 warnx("Error: memory allocation failed in "
434 "cd9660_setup_boot");
435 return -1;
436 }
437 LIST_INSERT_AFTER(default_entry, head, ll_struct)do { if (((head)->ll_struct.le_next = (default_entry)->
ll_struct.le_next) != ((void *)0)) (default_entry)->ll_struct
.le_next->ll_struct.le_prev = &(head)->ll_struct.le_next
; (default_entry)->ll_struct.le_next = (head); (head)->
ll_struct.le_prev = &(default_entry)->ll_struct.le_next
; } while (0);
438 *headp = head;
439 } else
440 head = *headp;
441
442 head->entry_data.SH.num_section_entries[0]++;
443
444 /* Step 2a: Section entry and extensions */
445 temp = cd9660_boot_setup_section_entry(tmp_disk);
446 if (temp == NULL((void *)0)) {
447 warn("%s: cd9660_boot_setup_section_entry", __func__);
448 return -1;
449 }
450
451 while ((next = LIST_NEXT(head, ll_struct)((head)->ll_struct.le_next)) != NULL((void *)0) &&
452 next->entry_type == ET_ENTRY_SE4)
453 head = next;
454
455 LIST_INSERT_AFTER(head, temp, ll_struct)do { if (((temp)->ll_struct.le_next = (head)->ll_struct
.le_next) != ((void *)0)) (head)->ll_struct.le_next->ll_struct
.le_prev = &(temp)->ll_struct.le_next; (head)->ll_struct
.le_next = (temp); (temp)->ll_struct.le_prev = &(head)
->ll_struct.le_next; } while (0);
456 tmp_disk = TAILQ_NEXT(tmp_disk, image_list)((tmp_disk)->image_list.tqe_next);
457 }
458
459 /* TODO: Remaining boot disks when implemented */
460
461 return first_sector + used_sectors;
462}
463
464int
465cd9660_setup_boot_volume_descriptor(iso9660_disk *diskStructure,
466 volume_descriptor *bvd)
467{
468 boot_volume_descriptor *bvdData =
469 (boot_volume_descriptor*)bvd->volumeDescriptorData;
470
471 bvdData->boot_record_indicator[0] = ISO_VOLUME_DESCRIPTOR_BOOT0;
472 memcpy(bvdData->identifier, ISO_VOLUME_DESCRIPTOR_STANDARD_ID"CD001", 5);
473 bvdData->version[0] = 1;
474 memcpy(bvdData->boot_system_identifier, ET_ID"EL TORITO SPECIFICATION", 23);
475 memcpy(bvdData->identifier, ISO_VOLUME_DESCRIPTOR_STANDARD_ID"CD001", 5);
476 diskStructure->boot_descriptor =
477 (boot_volume_descriptor*) bvd->volumeDescriptorData;
478 return 1;
479}
480
481static int
482cd9660_write_mbr_partition_entry(FILE *fd, int idx, off_t sector_start,
483 off_t nsectors, int type)
484{
485 uint8_t val;
486 uint32_t lba;
487
488 if (fseeko(fd, (off_t)(idx) * 16 + 0x1be, SEEK_SET0) == -1)
489 err(1, "fseeko");
490
491 val = 0x80; /* Bootable */
492 fwrite(&val, sizeof(val), 1, fd);
493
494 val = 0xff; /* CHS begin */
495 fwrite(&val, sizeof(val), 1, fd);
496 fwrite(&val, sizeof(val), 1, fd);
497 fwrite(&val, sizeof(val), 1, fd);
498
499 val = type; /* Part type */
500 fwrite(&val, sizeof(val), 1, fd);
501
502 val = 0xff; /* CHS end */
503 fwrite(&val, sizeof(val), 1, fd);
504 fwrite(&val, sizeof(val), 1, fd);
505 fwrite(&val, sizeof(val), 1, fd);
506
507 /* LBA extent */
508 lba = htole32(sector_start)((__uint32_t)(sector_start));
509 fwrite(&lba, sizeof(lba), 1, fd);
510 lba = htole32(nsectors)((__uint32_t)(nsectors));
511 fwrite(&lba, sizeof(lba), 1, fd);
512
513 return 0;
514}
515
516static int
517cd9660_write_apm_partition_entry(FILE *fd, int idx, int total_partitions,
518 off_t sector_start, off_t nsectors, off_t sector_size,
519 const char *part_name, const char *part_type)
520{
521 uint32_t apm32, part_status;
522 uint16_t apm16;
523
524 part_status = APPLE_PS_VALID0x00000001 | APPLE_PS_ALLOCATED0x00000002 | APPLE_PS_READABLE0x00000010 |
525 APPLE_PS_WRITABLE0x00000020;
526
527 if (fseeko(fd, (off_t)(idx + 1) * sector_size, SEEK_SET0) == -1)
528 err(1, "fseeko");
529
530 /* Signature */
531 apm16 = htobe16(0x504d)(__uint16_t)(__builtin_constant_p(0x504d) ? (__uint16_t)(((__uint16_t
)(0x504d) & 0xffU) << 8 | ((__uint16_t)(0x504d) &
0xff00U) >> 8) : __swap16md(0x504d));
532 fwrite(&apm16, sizeof(apm16), 1, fd);
533 apm16 = 0;
534 fwrite(&apm16, sizeof(apm16), 1, fd);
535
536 /* Total number of partitions */
537 apm32 = htobe32(total_partitions)(__uint32_t)(__builtin_constant_p(total_partitions) ? (__uint32_t
)(((__uint32_t)(total_partitions) & 0xff) << 24 | (
(__uint32_t)(total_partitions) & 0xff00) << 8 | ((__uint32_t
)(total_partitions) & 0xff0000) >> 8 | ((__uint32_t
)(total_partitions) & 0xff000000) >> 24) : __swap32md
(total_partitions));
538 fwrite(&apm32, sizeof(apm32), 1, fd);
539 /* Bounds */
540 apm32 = htobe32(sector_start)(__uint32_t)(__builtin_constant_p(sector_start) ? (__uint32_t
)(((__uint32_t)(sector_start) & 0xff) << 24 | ((__uint32_t
)(sector_start) & 0xff00) << 8 | ((__uint32_t)(sector_start
) & 0xff0000) >> 8 | ((__uint32_t)(sector_start) &
0xff000000) >> 24) : __swap32md(sector_start));
541 fwrite(&apm32, sizeof(apm32), 1, fd);
542 apm32 = htobe32(nsectors)(__uint32_t)(__builtin_constant_p(nsectors) ? (__uint32_t)(((
__uint32_t)(nsectors) & 0xff) << 24 | ((__uint32_t)
(nsectors) & 0xff00) << 8 | ((__uint32_t)(nsectors)
& 0xff0000) >> 8 | ((__uint32_t)(nsectors) & 0xff000000
) >> 24) : __swap32md(nsectors));
543 fwrite(&apm32, sizeof(apm32), 1, fd);
544
545 fwrite(part_name, strlen(part_name) + 1, 1, fd);
546 fseek(fd, 32 - strlen(part_name) - 1, SEEK_CUR1);
547 fwrite(part_type, strlen(part_type) + 1, 1, fd);
548 fseek(fd, 32 - strlen(part_type) - 1, SEEK_CUR1);
549
550 apm32 = 0;
551 /* pmLgDataStart */
552 fwrite(&apm32, sizeof(apm32), 1, fd);
553 /* pmDataCnt */
554 apm32 = htobe32(nsectors)(__uint32_t)(__builtin_constant_p(nsectors) ? (__uint32_t)(((
__uint32_t)(nsectors) & 0xff) << 24 | ((__uint32_t)
(nsectors) & 0xff00) << 8 | ((__uint32_t)(nsectors)
& 0xff0000) >> 8 | ((__uint32_t)(nsectors) & 0xff000000
) >> 24) : __swap32md(nsectors));
555 fwrite(&apm32, sizeof(apm32), 1, fd);
556 /* pmPartStatus */
557 apm32 = htobe32(part_status)(__uint32_t)(__builtin_constant_p(part_status) ? (__uint32_t)
(((__uint32_t)(part_status) & 0xff) << 24 | ((__uint32_t
)(part_status) & 0xff00) << 8 | ((__uint32_t)(part_status
) & 0xff0000) >> 8 | ((__uint32_t)(part_status) &
0xff000000) >> 24) : __swap32md(part_status));
558 fwrite(&apm32, sizeof(apm32), 1, fd);
559
560 return 0;
561}
562
563int
564cd9660_write_boot(iso9660_disk *diskStructure, FILE *fd)
565{
566 struct boot_catalog_entry *e;
567 struct cd9660_boot_image *t;
568 int apm_partitions = 0;
569 int mbr_partitions = 0;
570
571 /* write boot catalog */
572 if (fseeko(fd, (off_t)diskStructure->boot_catalog_sector *
573 diskStructure->sectorSize, SEEK_SET0) == -1)
574 err(1, "fseeko");
575
576 LIST_FOREACH(e, &diskStructure->boot_entries, ll_struct)for((e) = ((&diskStructure->boot_entries)->lh_first
); (e)!= ((void *)0); (e) = ((e)->ll_struct.le_next)) {
577 /*
578 * It doesnt matter which one gets written
579 * since they are the same size
580 */
581 fwrite(&(e->entry_data.VE), 1, 32, fd);
582 }
583
584 /* copy boot images */
585 TAILQ_FOREACH(t, &diskStructure->boot_images, image_list)for((t) = ((&diskStructure->boot_images)->tqh_first
); (t) != ((void *)0); (t) = ((t)->image_list.tqe_next)) {
586 cd9660_copy_file(diskStructure, fd, t->sector, t->filename);
587
588 if (t->system == ET_SYS_MAC2)
589 apm_partitions++;
590 if (t->system == ET_SYS_PPC1)
591 mbr_partitions++;
592 }
593
594 /* some systems need partition tables as well */
595 if (mbr_partitions > 0) {
596 uint16_t sig;
597
598 fseek(fd, 0x1fe, SEEK_SET0);
599 sig = htole16(0xaa55)((__uint16_t)(0xaa55));
600 fwrite(&sig, sizeof(sig), 1, fd);
601
602 mbr_partitions = 0;
603
604 /* Write all partition entries */
605 TAILQ_FOREACH(t, &diskStructure->boot_images, image_list)for((t) = ((&diskStructure->boot_images)->tqh_first
); (t) != ((void *)0); (t) = ((t)->image_list.tqe_next)) {
606 if (t->system != ET_SYS_PPC1)
607 continue;
608 cd9660_write_mbr_partition_entry(fd, mbr_partitions++,
609 t->sector * (diskStructure->sectorSize / 512),
610 t->num_sectors * (diskStructure->sectorSize / 512),
611 0x41 /* PReP Boot */);
612 }
613 }
614
615 if (apm_partitions > 0) {
616 /* Write DDR and global APM info */
617 uint32_t apm32;
618 uint16_t apm16;
619 int total_parts;
620
621 fseek(fd, 0, SEEK_SET0);
622 apm16 = htobe16(0x4552)(__uint16_t)(__builtin_constant_p(0x4552) ? (__uint16_t)(((__uint16_t
)(0x4552) & 0xffU) << 8 | ((__uint16_t)(0x4552) &
0xff00U) >> 8) : __swap16md(0x4552));
623 fwrite(&apm16, sizeof(apm16), 1, fd);
624 /* Device block size */
625 apm16 = htobe16(512)(__uint16_t)(__builtin_constant_p(512) ? (__uint16_t)(((__uint16_t
)(512) & 0xffU) << 8 | ((__uint16_t)(512) & 0xff00U
) >> 8) : __swap16md(512));
626 fwrite(&apm16, sizeof(apm16), 1, fd);
627 /* Device block count */
628 apm32 = htobe32(diskStructure->totalSectors *(__uint32_t)(__builtin_constant_p(diskStructure->totalSectors
* (diskStructure->sectorSize / 512)) ? (__uint32_t)(((__uint32_t
)(diskStructure->totalSectors * (diskStructure->sectorSize
/ 512)) & 0xff) << 24 | ((__uint32_t)(diskStructure
->totalSectors * (diskStructure->sectorSize / 512)) &
0xff00) << 8 | ((__uint32_t)(diskStructure->totalSectors
* (diskStructure->sectorSize / 512)) & 0xff0000) >>
8 | ((__uint32_t)(diskStructure->totalSectors * (diskStructure
->sectorSize / 512)) & 0xff000000) >> 24) : __swap32md
(diskStructure->totalSectors * (diskStructure->sectorSize
/ 512)))
629 (diskStructure->sectorSize / 512))(__uint32_t)(__builtin_constant_p(diskStructure->totalSectors
* (diskStructure->sectorSize / 512)) ? (__uint32_t)(((__uint32_t
)(diskStructure->totalSectors * (diskStructure->sectorSize
/ 512)) & 0xff) << 24 | ((__uint32_t)(diskStructure
->totalSectors * (diskStructure->sectorSize / 512)) &
0xff00) << 8 | ((__uint32_t)(diskStructure->totalSectors
* (diskStructure->sectorSize / 512)) & 0xff0000) >>
8 | ((__uint32_t)(diskStructure->totalSectors * (diskStructure
->sectorSize / 512)) & 0xff000000) >> 24) : __swap32md
(diskStructure->totalSectors * (diskStructure->sectorSize
/ 512)));
630 fwrite(&apm32, sizeof(apm32), 1, fd);
631 /* Device type/id */
632 apm16 = htobe16(1)(__uint16_t)(__builtin_constant_p(1) ? (__uint16_t)(((__uint16_t
)(1) & 0xffU) << 8 | ((__uint16_t)(1) & 0xff00U
) >> 8) : __swap16md(1));
633 fwrite(&apm16, sizeof(apm16), 1, fd);
634 fwrite(&apm16, sizeof(apm16), 1, fd);
635
636 /* Count total needed entries */
637 total_parts = 2 + apm_partitions; /* Self + ISO9660 */
638
639 /* Write self-descriptor */
640 cd9660_write_apm_partition_entry(fd, 0, total_parts, 1,
641 total_parts, 512, "Apple", "Apple_partition_map");
642
643 /* Write all partition entries */
644 apm_partitions = 0;
645 TAILQ_FOREACH(t, &diskStructure->boot_images, image_list)for((t) = ((&diskStructure->boot_images)->tqh_first
); (t) != ((void *)0); (t) = ((t)->image_list.tqe_next)) {
646 if (t->system != ET_SYS_MAC2)
647 continue;
648
649 cd9660_write_apm_partition_entry(fd,
650 1 + apm_partitions++, total_parts,
651 t->sector * (diskStructure->sectorSize / 512),
652 t->num_sectors * (diskStructure->sectorSize / 512),
653 512, "CD Boot", "Apple_Bootstrap");
654 }
655
656 /* Write ISO9660 descriptor, enclosing the whole disk */
657 cd9660_write_apm_partition_entry(fd, 2 + apm_partitions,
658 total_parts, 0, diskStructure->totalSectors *
659 (diskStructure->sectorSize / 512), 512, "ISO9660",
660 "CD_ROM_Mode_1");
661 }
662
663 return 0;
664}