1 /* @(#)eltorito.c 1.52 15/11/23 joerg */
2 #include <schily/mconfig.h>
3 #ifndef lint
4 static UConst char sccsid[] =
5 "@(#)eltorito.c 1.52 15/11/23 joerg";
6
7 #endif
8 /*
9 * Program eltorito.c - Handle El Torito specific extensions to iso9660.
10 *
11 *
12 * Written by Michael Fulbright <msf@redhat.com> (1996).
13 *
14 * Copyright 1996 RedHat Software, Incorporated
15 * Copyright (c) 1999-2015 J. Schilling
16 *
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License as published by
19 * the Free Software Foundation; either version 2, or (at your option)
20 * any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 */
31
32 #include "mkisofs.h"
33 #include <schily/fcntl.h>
34 #include <schily/utypes.h>
35 #include <schily/intcvt.h>
36 #include "match.h"
37 #include "diskmbr.h"
38 #include "bootinfo.h"
39 #include <schily/schily.h>
40
41 #undef MIN
42 #define MIN(a, b) (((a) < (b))? (a): (b))
43
44 EXPORT void init_boot_catalog __PR((const char *path));
45 EXPORT void insert_boot_cat __PR((void));
46 LOCAL void get_torito_desc __PR((struct eltorito_boot_descriptor *boot_desc));
47 LOCAL void fill_boot_shdr __PR((struct eltorito_sectionheader_entry *boot_shdr_entry,
48 int arch));
49 LOCAL void fill_boot_desc __PR((struct eltorito_defaultboot_entry *boot_desc_entry,
50 struct eltorito_boot_entry_info *boot_entry));
51 EXPORT void get_boot_entry __PR((void));
52 EXPORT int new_boot_entry __PR((void));
53 EXPORT void ex_boot_enoent __PR((char *msg, char *pname));
54 LOCAL int tvd_write __PR((FILE *outfile));
55
56
57 LOCAL struct eltorito_validation_entry valid_desc;
58 LOCAL struct eltorito_boot_descriptor gboot_desc;
59 LOCAL struct disk_master_boot_record disk_mbr;
60 LOCAL unsigned int bcat_de_flags;
61 LOCAL char *bootcat_path; /* name of bootcatalog */
62
63 /*
64 * Make sure any existing boot catalog is excluded
65 */
66 EXPORT void
init_boot_catalog(path)67 init_boot_catalog(path)
68 const char *path;
69 {
70 #ifdef SORTING
71 struct eltorito_boot_entry_info *cbe;
72
73 for (cbe = first_boot_entry;
74 cbe != NULL;
75 cbe = cbe->next) {
76 char *p;
77
78 if (cbe->boot_image == NULL)
79 comerrno(EX_BAD, _("Missing boot image name, use -eltorito-boot option.\n"));
80 p = (char *)e_malloc(strlen(cbe->boot_image) + strlen(path) + 2);
81 strcpy(p, path);
82 if (p[strlen(p) - 1] != '/') {
83 strcat(p, "/");
84 }
85 strcat(p, cbe->boot_image);
86 add_sort_match(p, sort_matches(p, 1));
87 free(p);
88 }
89 #endif
90 bootcat_path = (char *)e_malloc(strlen(boot_catalog) + strlen(path) + 2);
91 strcpy(bootcat_path, path);
92 if (bootcat_path[strlen(bootcat_path) - 1] != '/') {
93 strcat(bootcat_path, "/");
94 }
95 strcat(bootcat_path, boot_catalog);
96
97 /*
98 * we are going to create a virtual catalog file
99 * - so make sure any existing is excluded
100 */
101 add_match(bootcat_path);
102
103 /* flag the file as a memory file */
104 bcat_de_flags = MEMORY_FILE;
105
106 /* find out if we want to "hide" this file */
107 if (i_matches(boot_catalog) || i_matches(bootcat_path))
108 bcat_de_flags |= INHIBIT_ISO9660_ENTRY;
109
110 if (j_matches(boot_catalog) || j_matches(bootcat_path))
111 bcat_de_flags |= INHIBIT_JOLIET_ENTRY;
112
113 if (u_matches(boot_catalog) || u_matches(bootcat_path))
114 bcat_de_flags |= INHIBIT_UDF_ENTRY;
115
116 } /* init_boot_catalog(... */
117
118 /*
119 * Create a boot catalog file in memory - mkisofs already uses this type of
120 * file for the TRANS.TBL files. Therefore the boot catalog is set up in
121 * similar way
122 */
123 EXPORT void
insert_boot_cat()124 insert_boot_cat()
125 {
126 struct directory_entry *de;
127 struct directory_entry *s_entry;
128 char *p1;
129 char *p2;
130 char *p3;
131 struct directory *this_dir;
132 struct directory *dir;
133 char *buffer;
134
135 init_fstatbuf();
136
137 buffer = (char *)e_malloc(SECTOR_SIZE);
138 memset(buffer, 0, SECTOR_SIZE);
139
140 /*
141 * try to find the directory that will contain the boot.cat file
142 * - not very neat, but I can't think of a better way
143 */
144 p1 = e_strdup(boot_catalog);
145
146 /* get dirname (p1) and basename (p2) of boot.cat */
147 if ((p2 = strrchr(p1, '/')) != NULL) {
148 *p2 = '\0';
149 p2++;
150
151 /* find the dirname directory entry */
152 de = search_tree_file(root, p1);
153 if (!de) {
154 ex_boot_enoent(_("catalog directory"), p1);
155 /* NOTREACHED */
156 }
157 this_dir = 0;
158
159 /* get the basename (p3) of the directory */
160 if ((p3 = strrchr(p1, '/')) != NULL)
161 p3++;
162 else
163 p3 = p1;
164
165 /* find the correct sub-directory entry */
166 for (dir = de->filedir->subdir; dir; dir = dir->next)
167 if (strcmp(dir->de_name, p3) == 0)
168 this_dir = dir;
169
170 if (this_dir == 0) {
171 ex_boot_enoent(_("catalog directory"), p3);
172 /* NOTREACHED */
173 }
174 } else {
175 /* boot.cat is in the root directory */
176 this_dir = root;
177 p2 = p1;
178 }
179
180 /*
181 * make a directory entry in memory (using the same set up as for table
182 * entries
183 */
184 s_entry = (struct directory_entry *)
185 e_malloc(sizeof (struct directory_entry));
186 memset(s_entry, 0, sizeof (struct directory_entry));
187 s_entry->next = this_dir->contents;
188 this_dir->contents = s_entry;
189
190 #ifdef SORTING
191 /* inherit any sort weight from parent directory */
192 s_entry->sort = this_dir->sort;
193 s_entry->sort += 2;
194
195 /* see if this entry should have a new weighting */
196 if (do_sort) {
197 s_entry->sort = sort_matches(bootcat_path, s_entry->sort);
198 }
199 #endif /* SORTING */
200
201 s_entry->isorec.flags[0] = ISO_FILE;
202 s_entry->priority = 32768;
203 iso9660_date(s_entry->isorec.date, fstatbuf.st_mtime);
204 s_entry->inode = TABLE_INODE;
205 s_entry->dev = (dev_t)UNCACHED_DEVICE;
206 set_723(s_entry->isorec.volume_sequence_number,
207 volume_sequence_number);
208 set_733((char *)s_entry->isorec.size, SECTOR_SIZE);
209 s_entry->size = SECTOR_SIZE;
210 s_entry->filedir = this_dir;
211 s_entry->name = e_strdup(p2);
212 iso9660_file_length(p2, s_entry, 0);
213
214 /* flag file as necessary */
215 s_entry->de_flags = bcat_de_flags;
216
217 if ((use_XA || use_RockRidge) &&
218 !(bcat_de_flags & INHIBIT_ISO9660_ENTRY)) {
219 fstatbuf.st_mode = 0444 | S_IFREG;
220 fstatbuf.st_nlink = 1;
221 generate_xa_rr_attributes("",
222 p2, s_entry,
223 &fstatbuf, &fstatbuf, 0);
224 }
225 /*
226 * memory files are stored at s_entry->table
227 * - but this is also used for each s_entry to generate
228 * TRANS.TBL entries. So if we are generating tables,
229 * store the TRANS.TBL data here for the moment
230 */
231 if (generate_tables && !(bcat_de_flags & INHIBIT_ISO9660_ENTRY)) {
232 sprintf(buffer, "F\t%s\n", s_entry->name);
233
234 /* copy the TRANS.TBL entry info and clear the buffer */
235 s_entry->table = e_strdup(buffer);
236 memset(buffer, 0, SECTOR_SIZE);
237
238 /*
239 * store the (empty) file data in the
240 * unused s_entry->whole_name element for the time being
241 * - this will be transferred to s_entry->table after any
242 * TRANS.TBL processing later
243 */
244 s_entry->whole_name = buffer;
245 } else {
246 /* store the (empty) file data in the s_entry->table element */
247 s_entry->table = buffer;
248 s_entry->whole_name = NULL;
249 }
250 }
251
252 LOCAL void
get_torito_desc(boot_desc)253 get_torito_desc(boot_desc)
254 struct eltorito_boot_descriptor *boot_desc;
255 {
256 int checksum;
257 unsigned char *checksum_ptr;
258 struct directory_entry *de2; /* Boot catalog */
259 int i;
260 int offset;
261 int arch = 0;
262 int nentries = 0;
263 struct eltorito_defaultboot_entry boot_desc_record;
264 struct eltorito_sectionheader_entry boot_shdr_record;
265 #ifdef __needed__
266 struct eltorito_section_entry boot_section_record;
267 #endif
268 struct eltorito_sectionheader_entry *last_section_header = 0;
269
270 memset(boot_desc, 0, sizeof (*boot_desc));
271 boot_desc->type[0] = 0;
272 strncpy(boot_desc->id, ISO_STANDARD_ID, sizeof (boot_desc->id));
273 boot_desc->version[0] = 1;
274
275 memcpy(boot_desc->system_id, EL_TORITO_ID, sizeof (EL_TORITO_ID));
276
277 /*
278 * search from root of iso fs to find boot catalog
279 * - we already know where the boot catalog is
280 * - we created it above - but lets search for it anyway
281 * - good sanity check!
282 */
283 de2 = search_tree_file(root, boot_catalog);
284 if (!de2 || !(de2->de_flags & MEMORY_FILE)) {
285 ex_boot_enoent(_("catalog"), boot_catalog);
286 /* NOTREACHED */
287 }
288 set_731(boot_desc->bootcat_ptr,
289 (unsigned int) get_733(de2->isorec.extent));
290
291 /*
292 * If the platform id for the first (default) boot entry has not been
293 * explicitly set, we default to EL_TORITO_ARCH_x86
294 */
295 if ((first_boot_entry->type & ELTORITO_BOOT_ID) == 0) {
296 first_boot_entry->boot_platform = EL_TORITO_ARCH_x86;
297 }
298 arch = first_boot_entry->boot_platform;
299
300 /*
301 * we have the boot image, so write boot catalog information
302 * Next we write out the primary descriptor for the disc
303 */
304 memset(&valid_desc, 0, sizeof (valid_desc));
305 valid_desc.headerid[0] = 1;
306 valid_desc.arch[0] = arch; /* Platform id for the default boot */
307
308 /*
309 * we'll shove start of publisher id into id field,
310 * may get truncated but who really reads this stuff!
311 */
312 if (publisher)
313 memcpy_max(valid_desc.id, publisher,
314 MIN(23, strlen(publisher)));
315
316 valid_desc.key1[0] = (char)0x55;
317 valid_desc.key2[0] = (char)0xAA;
318
319 /* compute the checksum */
320 checksum = 0;
321 checksum_ptr = (unsigned char *) &valid_desc;
322 /* Set checksum to 0 before computing checksum */
323 set_721(valid_desc.cksum, 0);
324 for (i = 0; i < (int)sizeof (valid_desc); i += 2) {
325 checksum += (unsigned int) checksum_ptr[i];
326 checksum += ((unsigned int) checksum_ptr[i + 1]) * 256;
327 }
328
329 /* now find out the real checksum */
330 checksum = -checksum;
331 set_721(valid_desc.cksum, (unsigned int) checksum);
332
333 /* now write it to the virtual boot catalog */
334 memcpy(de2->table, &valid_desc, 32);
335
336 for (current_boot_entry = first_boot_entry, offset = sizeof (valid_desc);
337 current_boot_entry != NULL;
338 current_boot_entry = current_boot_entry->next,
339 offset += sizeof (boot_desc_record)) {
340 int newarch = arch;
341
342 if (current_boot_entry->type & ELTORITO_BOOT_ID)
343 newarch = current_boot_entry->boot_platform;
344 else
345 current_boot_entry->boot_platform = arch;
346
347 /*
348 * El Torito has no such limitation but we currently have...
349 */
350 if (offset >= (SECTOR_SIZE - sizeof (boot_desc_record))) {
351 comerrno(EX_BAD,
352 _("Too many El Torito boot entries\n"));
353 }
354 if (current_boot_entry == first_boot_entry) {
355 ;
356 /* EMPTY */
357 } else if ((current_boot_entry == first_boot_entry->next) ||
358 (arch != newarch) ||
359 (current_boot_entry->type & ELTORITO_SECTION_HEADER)) {
360 if (last_section_header)
361 set_721(&last_section_header->entry_count, nentries);
362 nentries = 1;
363 last_section_header = (struct eltorito_sectionheader_entry *)
364 (de2->table + offset);
365 fill_boot_shdr(&boot_shdr_record, newarch);
366 memcpy(de2->table + offset, &boot_shdr_record,
367 sizeof (boot_shdr_record));
368 offset += sizeof (boot_desc_record);
369 } else {
370 nentries++; /* Add entry to this section header */
371 }
372 /*
373 * This works because a section entry has the same essential
374 * layout as a default entry (and we do not populate the
375 * selection criteria fields).
376 */
377 fill_boot_desc(&boot_desc_record, current_boot_entry);
378 memcpy(de2->table + offset, &boot_desc_record,
379 sizeof (boot_desc_record));
380 }
381
382 if (last_section_header) {
383 set_721(&last_section_header->entry_count, nentries);
384 last_section_header->header_id[0] = EL_TORITO_SHDR_ID_LAST_SHDR;
385 }
386
387 } /* get_torito_desc(... */
388
389 LOCAL void
fill_boot_shdr(boot_shdr_entry,arch)390 fill_boot_shdr(boot_shdr_entry, arch)
391 struct eltorito_sectionheader_entry *boot_shdr_entry;
392 int arch;
393 {
394 memset(boot_shdr_entry, 0, sizeof (struct eltorito_sectionheader_entry));
395 boot_shdr_entry->header_id[0] = EL_TORITO_SHDR_ID_SHDR;
396 boot_shdr_entry->platform_id[0] = arch;
397 }
398
399 LOCAL void
fill_boot_desc(boot_desc_entry,boot_entry)400 fill_boot_desc(boot_desc_entry, boot_entry)
401 struct eltorito_defaultboot_entry *boot_desc_entry;
402 struct eltorito_boot_entry_info *boot_entry;
403 {
404 struct directory_entry *de; /* Boot file */
405 int bootmbr;
406 int i;
407 int nsectors;
408 int geosec;
409
410 if (!boot_desc_entry || !boot_entry)
411 return;
412
413 /* now adjust boot catalog lets find boot image first */
414 de = search_tree_file(root, boot_entry->boot_image);
415 if (!de) {
416 ex_boot_enoent(_("image"), boot_entry->boot_image);
417 /* NOTREACHED */
418 }
419 /* now make the initial/default entry for boot catalog */
420 memset(boot_desc_entry, 0, sizeof (*boot_desc_entry));
421 boot_desc_entry->boot_id[0] = (char)boot_entry->not_bootable ?
422 EL_TORITO_NOT_BOOTABLE : EL_TORITO_BOOTABLE;
423
424 /* use default BIOS loadpnt */
425 set_721(boot_desc_entry->loadseg, boot_entry->load_addr);
426
427 /*
428 * figure out size of boot image in 512-byte sectors.
429 * However, round up to the nearest integral CD (2048-byte) sector.
430 * This is only used for no-emulation booting.
431 */
432 nsectors = boot_entry->load_size ? boot_entry->load_size :
433 ISO_BLOCKS(de->size) * (SECTOR_SIZE/512);
434
435 if (verbose > 0) {
436 fprintf(stderr,
437 _("Size of boot image is %d sectors -> "), nsectors);
438 }
439
440 if (boot_entry->hard_disk_boot) {
441 /* sanity test hard disk boot image */
442 boot_desc_entry->boot_media[0] = EL_TORITO_MEDIA_HD;
443 if (verbose > 0)
444 fprintf(stderr, _("Emulating a hard disk\n"));
445
446 /* read MBR */
447 bootmbr = open(de->whole_name, O_RDONLY | O_BINARY);
448 if (bootmbr == -1) {
449 comerr(_("Error opening boot image '%s' for read.\n"),
450 de->whole_name);
451 }
452 if (read(bootmbr, &disk_mbr, sizeof (disk_mbr)) !=
453 sizeof (disk_mbr)) {
454 comerr(_("Error reading MBR from boot image '%s'.\n"),
455 de->whole_name);
456 }
457 close(bootmbr);
458 if (la_to_u_2_byte(disk_mbr.magic) != MBR_MAGIC) {
459 errmsgno(EX_BAD,
460 _("Warning: boot image '%s' MBR is not a boot sector.\n"),
461 de->whole_name);
462 }
463 /* find partition type */
464 boot_desc_entry->sys_type[0] = PARTITION_UNUSED;
465 for (i = 0; i < PARTITION_COUNT; ++i) {
466 int s_cyl_sec;
467 int e_cyl_sec;
468
469 s_cyl_sec =
470 la_to_u_2_byte(disk_mbr.partition[i].s_cyl_sec);
471 e_cyl_sec =
472 la_to_u_2_byte(disk_mbr.partition[i].e_cyl_sec);
473
474 if (disk_mbr.partition[i].type != PARTITION_UNUSED) {
475 if (boot_desc_entry->sys_type[0] !=
476 PARTITION_UNUSED) {
477 comerrno(EX_BAD,
478 _("Boot image '%s' has multiple partitions.\n"),
479 de->whole_name);
480 }
481 boot_desc_entry->sys_type[0] =
482 disk_mbr.partition[i].type;
483
484 /* a few simple sanity warnings */
485 if (!boot_entry->not_bootable &&
486 disk_mbr.partition[i].status !=
487 PARTITION_ACTIVE) {
488 fprintf(stderr,
489 _("Warning: partition not marked active.\n"));
490 }
491 if (MBR_CYLINDER(s_cyl_sec) != 0 ||
492 disk_mbr.partition[i].s_head != 1 ||
493 MBR_SECTOR(s_cyl_sec != 1)) {
494 fprintf(stderr,
495 _("Warning: partition does not start at 0/1/1.\n"));
496 }
497 geosec = (MBR_CYLINDER(e_cyl_sec) + 1) *
498 (disk_mbr.partition[i].e_head + 1) *
499 MBR_SECTOR(e_cyl_sec);
500 if (geosec != nsectors) {
501 fprintf(stderr,
502 _("Warning: image size does not match geometry (%d)\n"),
503 geosec);
504 }
505 #ifdef DEBUG_TORITO
506 fprintf(stderr, "Partition start %u/%u/%u\n",
507 MBR_CYLINDER(s_cyl_sec),
508 disk_mbr.partition[i].s_head,
509 MBR_SECTOR(s_cyl_sec));
510 fprintf(stderr, "Partition end %u/%u/%u\n",
511 MBR_CYLINDER(e_cyl_sec),
512 disk_mbr.partition[i].e_head,
513 MBR_SECTOR(e_cyl_sec));
514 #endif
515 }
516 }
517 if (boot_desc_entry->sys_type[0] == PARTITION_UNUSED) {
518 comerrno(EX_BAD,
519 _("Boot image '%s' has no partitions.\n"),
520 de->whole_name);
521 }
522 #ifdef DEBUG_TORITO
523 fprintf(stderr, "Partition type %u\n",
524 boot_desc_entry->sys_type[0]);
525 #endif
526 /* load single boot sector, in this case the MBR */
527 nsectors = 1;
528
529 } else if (boot_entry->no_emul_boot) {
530 /*
531 * no emulation is a simple image boot of all the sectors
532 * in the boot image
533 */
534 boot_desc_entry->boot_media[0] = EL_TORITO_MEDIA_NOEMUL;
535 if (verbose > 0)
536 fprintf(stderr, _("No emulation\n"));
537
538 } else {
539 /* choose size of emulated floppy based on boot image size */
540 if (nsectors == 2880) {
541 boot_desc_entry->boot_media[0] = EL_TORITO_MEDIA_144FLOP;
542 if (verbose > 0)
543 fprintf(stderr, _("Emulating a 1440 kB floppy\n"));
544
545 } else if (nsectors == 5760) {
546 boot_desc_entry->boot_media[0] = EL_TORITO_MEDIA_288FLOP;
547 if (verbose > 0)
548 fprintf(stderr, _("Emulating a 2880 kB floppy\n"));
549
550 } else if (nsectors == 2400) {
551 boot_desc_entry->boot_media[0] = EL_TORITO_MEDIA_12FLOP;
552 if (verbose > 0)
553 fprintf(stderr, _("Emulating a 1200 kB floppy\n"));
554
555 } else {
556 comerrno(EX_BAD,
557 _("Error - boot image '%s' has not an allowable size.\n"),
558 de->whole_name);
559 }
560
561 /* load single boot sector for floppies */
562 nsectors = 1;
563 }
564
565 /* fill in boot image details */
566 #ifdef DEBUG_TORITO
567 fprintf(stderr, "Boot %u sectors\n", nsectors);
568 fprintf(stderr, "Extent of boot images is %d\n",
569 get_733(de->isorec.extent));
570 #endif
571 set_721(boot_desc_entry->nsect, (unsigned int) nsectors);
572 set_731(boot_desc_entry->bootoff,
573 (unsigned int) get_733(de->isorec.extent));
574
575
576 /* If the user has asked for it, patch the boot image */
577 if (boot_entry->boot_info_table) {
578 int bootimage;
579 unsigned int bi_checksum;
580 unsigned int total_len;
581 static char csum_buffer[SECTOR_SIZE];
582 int len;
583 struct mkisofs_boot_info bi_table;
584
585 bootimage = open(de->whole_name, O_RDWR | O_BINARY);
586 if (bootimage == -1) {
587 comerr(
588 _("Error opening boot image file '%s' for update.\n"),
589 de->whole_name);
590 }
591 /* Compute checksum of boot image, sans 64 bytes */
592 total_len = 0;
593 bi_checksum = 0;
594 while ((len = read(bootimage, csum_buffer, SECTOR_SIZE)) > 0) {
595 if (total_len & 3) {
596 comerrno(EX_BAD,
597 _("Odd alignment at non-end-of-file in boot image '%s'.\n"),
598 de->whole_name);
599 }
600 if (total_len < 64)
601 memset(csum_buffer, 0, 64 - total_len);
602 if (len < SECTOR_SIZE)
603 memset(csum_buffer + len, 0, SECTOR_SIZE-len);
604 for (i = 0; i < SECTOR_SIZE; i += 4)
605 bi_checksum += get_731(&csum_buffer[i]);
606 total_len += len;
607 }
608
609 if (total_len != de->size) {
610 comerrno(EX_BAD,
611 _("Boot image file '%s' changed underneath us!\n"),
612 de->whole_name);
613 }
614 /* End of file, set position to byte 8 */
615 lseek(bootimage, (off_t)8, SEEK_SET);
616 memset(&bi_table, 0, sizeof (bi_table));
617 /* Is it always safe to assume PVD is at session_start+16? */
618 set_731(bi_table.bi_pvd, session_start + 16);
619 set_731(bi_table.bi_file, de->starting_block);
620 set_731(bi_table.bi_length, de->size);
621 set_731(bi_table.bi_csum, bi_checksum);
622
623 write(bootimage, &bi_table, sizeof (bi_table));
624 close(bootimage);
625 }
626 } /* fill_boot_desc(... */
627
628 EXPORT void
get_boot_entry()629 get_boot_entry()
630 {
631 if (current_boot_entry)
632 return;
633
634 current_boot_entry = (struct eltorito_boot_entry_info *)
635 e_malloc(sizeof (struct eltorito_boot_entry_info));
636 memset(current_boot_entry, 0, sizeof (*current_boot_entry));
637
638 if (!first_boot_entry) {
639 first_boot_entry = current_boot_entry;
640 last_boot_entry = current_boot_entry;
641 current_boot_entry->boot_platform = EL_TORITO_ARCH_x86;
642 } else {
643 current_boot_entry->boot_platform = last_boot_entry->boot_platform;
644 last_boot_entry->next = current_boot_entry;
645 last_boot_entry = current_boot_entry;
646 }
647 }
648
649 EXPORT int
new_boot_entry()650 new_boot_entry()
651 {
652 current_boot_entry = NULL;
653 return (1);
654 }
655
656 /*
657 * Exit with a boot no entry message.
658 */
659 EXPORT void
ex_boot_enoent(msg,pname)660 ex_boot_enoent(msg, pname)
661 char *msg;
662 char *pname;
663 {
664 comerrno(EX_BAD, _("Uh oh, I cant find the boot %s '%s' inside the target tree.\n"), msg, pname);
665 /* NOTREACHED */
666 }
667
668 /*
669 * Function to write the EVD for the disc.
670 */
671 LOCAL int
tvd_write(outfile)672 tvd_write(outfile)
673 FILE *outfile;
674 {
675 /* check the boot image is not NULL */
676 if (!boot_image) {
677 comerrno(EX_BAD, _("No boot image specified.\n"));
678 }
679 /* Next we write out the boot volume descriptor for the disc */
680 get_torito_desc(&gboot_desc);
681 xfwrite(&gboot_desc, SECTOR_SIZE, 1, outfile, 0, FALSE);
682 last_extent_written++;
683 return (0);
684 }
685
686 struct output_fragment torito_desc = {NULL, oneblock_size, NULL, tvd_write, "Eltorito Volume Descriptor"};
687