1 /*-
2 * Copyright (c) 2013,2014 Juniper Networks, Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 */
26
27 #include <sys/param.h>
28 #include <sys/stat.h>
29 #include <errno.h>
30 #include <err.h>
31 #include <fcntl.h>
32 #include <getopt.h>
33 #include <libutil.h>
34 #include <limits.h>
35 #include <stdbool.h>
36 #include <stdint.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <sysexits.h>
41 #include <unistd.h>
42
43 #include "image.h"
44 #include "format.h"
45 #include "mkimg.h"
46 #include "scheme.h"
47
48 #define LONGOPT_FORMATS 0x01000001
49 #define LONGOPT_SCHEMES 0x01000002
50 #define LONGOPT_VERSION 0x01000003
51 #define LONGOPT_CAPACITY 0x01000004
52
53 static struct option longopts[] = {
54 { "formats", no_argument, NULL, LONGOPT_FORMATS },
55 { "schemes", no_argument, NULL, LONGOPT_SCHEMES },
56 { "version", no_argument, NULL, LONGOPT_VERSION },
57 { "capacity", required_argument, NULL, LONGOPT_CAPACITY },
58 { NULL, 0, NULL, 0 }
59 };
60
61 static uint64_t min_capacity = 0;
62 static uint64_t max_capacity = 0;
63
64 /* Fixed timestamp for reproducible builds. */
65 time_t timestamp = (time_t)-1;
66
67 struct partlisthead partlist = TAILQ_HEAD_INITIALIZER(partlist);
68 u_int nparts = 0;
69
70 u_int unit_testing;
71 u_int verbose;
72
73 u_int ncyls = 0;
74 u_int nheads = 1;
75 u_int nsecs = 1;
76 u_int secsz = 512;
77 u_int blksz = 0;
78 uint32_t active_partition = 0;
79
80 static void
print_formats(int usage)81 print_formats(int usage)
82 {
83 struct mkimg_format *f;
84 const char *sep;
85
86 if (usage) {
87 fprintf(stderr, " formats:\n");
88 f = NULL;
89 while ((f = format_iterate(f)) != NULL) {
90 fprintf(stderr, "\t%s\t- %s\n", f->name,
91 f->description);
92 }
93 } else {
94 sep = "";
95 f = NULL;
96 while ((f = format_iterate(f)) != NULL) {
97 printf("%s%s", sep, f->name);
98 sep = " ";
99 }
100 putchar('\n');
101 }
102 }
103
104 static void
print_schemes(int usage)105 print_schemes(int usage)
106 {
107 struct mkimg_scheme *s;
108 const char *sep;
109
110 if (usage) {
111 fprintf(stderr, " schemes:\n");
112 s = NULL;
113 while ((s = scheme_iterate(s)) != NULL) {
114 fprintf(stderr, "\t%s\t- %s\n", s->name,
115 s->description);
116 }
117 } else {
118 sep = "";
119 s = NULL;
120 while ((s = scheme_iterate(s)) != NULL) {
121 printf("%s%s", sep, s->name);
122 sep = " ";
123 }
124 putchar('\n');
125 }
126 }
127
128 static void
print_version(void)129 print_version(void)
130 {
131 u_int width;
132
133 #ifdef __LP64__
134 width = 64;
135 #else
136 width = 32;
137 #endif
138 printf("mkimg %u (%u-bit)\n", MKIMG_VERSION, width);
139 }
140
141 static void
usage(const char * why)142 usage(const char *why)
143 {
144
145 warnx("error: %s", why);
146 fputc('\n', stderr);
147 fprintf(stderr, "usage: %s <options>\n", getprogname());
148
149 fprintf(stderr, " options:\n");
150 fprintf(stderr, "\t--formats\t- list image formats\n");
151 fprintf(stderr, "\t--schemes\t- list partition schemes\n");
152 fprintf(stderr, "\t--version\t- show version information\n");
153 fputc('\n', stderr);
154 fprintf(stderr, "\t-a <num>\t- mark num'th partition as active\n");
155 fprintf(stderr, "\t-b <file>\t- file containing boot code\n");
156 fprintf(stderr, "\t-c <num>\t- minimum capacity (in bytes) of the disk\n");
157 fprintf(stderr, "\t-C <num>\t- maximum capacity (in bytes) of the disk\n");
158 fprintf(stderr, "\t-f <format>\n");
159 fprintf(stderr, "\t-o <file>\t- file to write image into\n");
160 fprintf(stderr, "\t-p <partition>\n");
161 fprintf(stderr, "\t-s <scheme>\n");
162 fprintf(stderr, "\t-v\t\t- increase verbosity\n");
163 fprintf(stderr, "\t-y\t\t- [developers] enable unit test\n");
164 fprintf(stderr, "\t-H <num>\t- number of heads to simulate\n");
165 fprintf(stderr, "\t-P <num>\t- physical sector size\n");
166 fprintf(stderr, "\t-S <num>\t- logical sector size\n");
167 fprintf(stderr, "\t-T <num>\t- number of tracks to simulate\n");
168 fputc('\n', stderr);
169 print_formats(1);
170 fputc('\n', stderr);
171 print_schemes(1);
172 fputc('\n', stderr);
173 fprintf(stderr, " partition specification:\n");
174 fprintf(stderr, "\t<t>[/<l>]::<size>[:[+]<offset>]\t- "
175 "empty partition of given size and\n\t\t\t\t\t"
176 " optional relative or absolute offset\n");
177 fprintf(stderr, "\t<t>[/<l>]:=<file>[:[+]offset]\t- partition "
178 "content and size are\n\t\t\t\t\t"
179 " determined by the named file and\n"
180 "\t\t\t\t\t optional relative or absolute offset\n");
181 fprintf(stderr, "\t<t>[/<l>]:-<cmd>\t\t- partition content and size "
182 "are taken\n\t\t\t\t\t from the output of the command to run\n");
183 fprintf(stderr, "\t-\t\t\t\t- unused partition entry\n");
184 fprintf(stderr, "\t where:\n");
185 fprintf(stderr, "\t\t<t>\t- scheme neutral partition type\n");
186 fprintf(stderr, "\t\t<l>\t- optional scheme-dependent partition "
187 "label\n");
188
189 exit(EX_USAGE);
190 }
191
192 static int
parse_uint32(uint32_t * valp,uint32_t min,uint32_t max,const char * arg)193 parse_uint32(uint32_t *valp, uint32_t min, uint32_t max, const char *arg)
194 {
195 uint64_t val;
196
197 if (expand_number(arg, &val) == -1)
198 return (errno);
199 if (val > UINT_MAX || val < (uint64_t)min || val > (uint64_t)max)
200 return (EINVAL);
201 *valp = (uint32_t)val;
202 return (0);
203 }
204
205 static int
parse_uint64(uint64_t * valp,uint64_t min,uint64_t max,const char * arg)206 parse_uint64(uint64_t *valp, uint64_t min, uint64_t max, const char *arg)
207 {
208 uint64_t val;
209
210 if (expand_number(arg, &val) == -1)
211 return (errno);
212 if (val < min || val > max)
213 return (EINVAL);
214 *valp = val;
215 return (0);
216 }
217
218 static int
pwr_of_two(u_int nr)219 pwr_of_two(u_int nr)
220 {
221
222 return (((nr & (nr - 1)) == 0) ? 1 : 0);
223 }
224
225 /*
226 * A partition specification has the following format:
227 * <type> ':' <kind> <contents>
228 * where:
229 * type the partition type alias
230 * kind the interpretation of the contents specification
231 * ':' contents holds the size of an empty partition
232 * '=' contents holds the name of a file to read
233 * '-' contents holds a command to run; the output of
234 * which is the contents of the partition.
235 * contents the specification of a partition's contents
236 *
237 * A specification that is a single dash indicates an unused partition
238 * entry.
239 */
240 static int
parse_part(const char * spec)241 parse_part(const char *spec)
242 {
243 struct part *part;
244 char *sep;
245 size_t len;
246 int error;
247
248 if (strcmp(spec, "-") == 0) {
249 nparts++;
250 return (0);
251 }
252
253 part = calloc(1, sizeof(struct part));
254 if (part == NULL)
255 return (ENOMEM);
256
257 sep = strchr(spec, ':');
258 if (sep == NULL) {
259 error = EINVAL;
260 goto errout;
261 }
262 len = sep - spec + 1;
263 if (len < 2) {
264 error = EINVAL;
265 goto errout;
266 }
267 part->alias = malloc(len);
268 if (part->alias == NULL) {
269 error = ENOMEM;
270 goto errout;
271 }
272 strlcpy(part->alias, spec, len);
273 spec = sep + 1;
274
275 switch (*spec) {
276 case ':':
277 part->kind = PART_KIND_SIZE;
278 break;
279 case '=':
280 part->kind = PART_KIND_FILE;
281 break;
282 case '-':
283 part->kind = PART_KIND_PIPE;
284 break;
285 default:
286 error = EINVAL;
287 goto errout;
288 }
289 spec++;
290
291 part->contents = strdup(spec);
292 if (part->contents == NULL) {
293 error = ENOMEM;
294 goto errout;
295 }
296
297 spec = part->alias;
298 sep = strchr(spec, '/');
299 if (sep != NULL) {
300 *sep++ = '\0';
301 if (strlen(part->alias) == 0 || strlen(sep) == 0) {
302 error = EINVAL;
303 goto errout;
304 }
305 part->label = strdup(sep);
306 if (part->label == NULL) {
307 error = ENOMEM;
308 goto errout;
309 }
310 }
311
312 part->index = nparts;
313 TAILQ_INSERT_TAIL(&partlist, part, link);
314 nparts++;
315 return (0);
316
317 errout:
318 if (part->alias != NULL)
319 free(part->alias);
320 free(part);
321 return (error);
322 }
323
324 #if defined(SPARSE_WRITE)
325 ssize_t
sparse_write(int fd,const void * ptr,size_t sz)326 sparse_write(int fd, const void *ptr, size_t sz)
327 {
328 const char *buf, *p;
329 off_t ofs;
330 size_t len;
331 ssize_t wr, wrsz;
332
333 buf = ptr;
334 wrsz = 0;
335 p = memchr(buf, 0, sz);
336 while (sz > 0) {
337 len = (p != NULL) ? (size_t)(p - buf) : sz;
338 if (len > 0) {
339 len = (len + secsz - 1) & ~(secsz - 1);
340 if (len > sz)
341 len = sz;
342 wr = write(fd, buf, len);
343 if (wr < 0)
344 return (-1);
345 } else {
346 while (len < sz && *p++ == '\0')
347 len++;
348 if (len < sz)
349 len &= ~(secsz - 1);
350 if (len == 0)
351 continue;
352 ofs = lseek(fd, len, SEEK_CUR);
353 if (ofs < 0)
354 return (-1);
355 wr = len;
356 }
357 buf += wr;
358 sz -= wr;
359 wrsz += wr;
360 p = memchr(buf, 0, sz);
361 }
362 return (wrsz);
363 }
364 #endif /* SPARSE_WRITE */
365
366 void
mkimg_chs(lba_t lba,u_int maxcyl,u_int * cylp,u_int * hdp,u_int * secp)367 mkimg_chs(lba_t lba, u_int maxcyl, u_int *cylp, u_int *hdp, u_int *secp)
368 {
369 u_int hd, sec;
370
371 *cylp = *hdp = *secp = ~0U;
372 if (nsecs == 1 || nheads == 1)
373 return;
374
375 sec = lba % nsecs + 1;
376 lba /= nsecs;
377 hd = lba % nheads;
378 lba /= nheads;
379 if (lba > maxcyl)
380 return;
381
382 *cylp = lba;
383 *hdp = hd;
384 *secp = sec;
385 }
386
387 static int
capacity_resize(lba_t end)388 capacity_resize(lba_t end)
389 {
390 lba_t min_capsz, max_capsz;
391
392 min_capsz = (min_capacity + secsz - 1) / secsz;
393 max_capsz = (max_capacity + secsz - 1) / secsz;
394
395 if (max_capsz != 0 && end > max_capsz)
396 return (ENOSPC);
397 if (end >= min_capsz)
398 return (0);
399
400 return (image_set_size(min_capsz));
401 }
402
403 static void
mkimg_validate(void)404 mkimg_validate(void)
405 {
406 struct part *part, *part2;
407 lba_t start, end, start2, end2;
408 int i, j;
409
410 i = 0;
411
412 TAILQ_FOREACH(part, &partlist, link) {
413 start = part->block;
414 end = part->block + part->size;
415 j = i + 1;
416 part2 = TAILQ_NEXT(part, link);
417 if (part2 == NULL)
418 break;
419
420 TAILQ_FOREACH_FROM(part2, &partlist, link) {
421 start2 = part2->block;
422 end2 = part2->block + part2->size;
423
424 if ((start >= start2 && start < end2) ||
425 (end > start2 && end <= end2)) {
426 errx(1, "partition %d overlaps partition %d",
427 i, j);
428 }
429
430 j++;
431 }
432
433 i++;
434 }
435 }
436
437 static void
mkimg(void)438 mkimg(void)
439 {
440 FILE *fp;
441 struct part *part;
442 lba_t block, blkoffset;
443 uint64_t bytesize, byteoffset;
444 char *size, *offset;
445 bool abs_offset;
446 int error, fd;
447
448 /* First check partition information */
449 TAILQ_FOREACH(part, &partlist, link) {
450 error = scheme_check_part(part);
451 if (error)
452 errc(EX_DATAERR, error, "partition %d", part->index+1);
453 }
454
455 block = scheme_metadata(SCHEME_META_IMG_START, 0);
456 abs_offset = false;
457 TAILQ_FOREACH(part, &partlist, link) {
458 byteoffset = blkoffset = 0;
459 abs_offset = false;
460
461 /* Look for an offset. Set size too if we can. */
462 switch (part->kind) {
463 case PART_KIND_SIZE:
464 case PART_KIND_FILE:
465 offset = part->contents;
466 size = strsep(&offset, ":");
467 if (part->kind == PART_KIND_SIZE &&
468 expand_number(size, &bytesize) == -1)
469 error = errno;
470 if (offset != NULL) {
471 if (*offset != '+')
472 abs_offset = true;
473 else
474 offset++;
475 if (expand_number(offset, &byteoffset) == -1)
476 error = errno;
477 }
478 break;
479 }
480
481 /* Work out exactly where the partition starts. */
482 blkoffset = (byteoffset + secsz - 1) / secsz;
483 if (abs_offset)
484 block = scheme_metadata(SCHEME_META_PART_ABSOLUTE,
485 blkoffset);
486 else
487 block = scheme_metadata(SCHEME_META_PART_BEFORE,
488 block + blkoffset);
489 part->block = block;
490
491 if (verbose)
492 fprintf(stderr, "partition %d: starting block %llu "
493 "... ", part->index + 1, (long long)part->block);
494
495 /* Pull in partition contents, set size if we haven't yet. */
496 switch (part->kind) {
497 case PART_KIND_FILE:
498 fd = open(part->contents, O_RDONLY, 0);
499 if (fd != -1) {
500 error = image_copyin(block, fd, &bytesize);
501 close(fd);
502 } else
503 error = errno;
504 break;
505 case PART_KIND_PIPE:
506 fp = popen(part->contents, "r");
507 if (fp != NULL) {
508 fd = fileno(fp);
509 error = image_copyin(block, fd, &bytesize);
510 pclose(fp);
511 } else
512 error = errno;
513 break;
514 }
515 if (error)
516 errc(EX_IOERR, error, "partition %d", part->index + 1);
517 part->size = (bytesize + secsz - 1) / secsz;
518 if (verbose) {
519 bytesize = part->size * secsz;
520 fprintf(stderr, "size %llu bytes (%llu blocks)\n",
521 (long long)bytesize, (long long)part->size);
522 if (abs_offset) {
523 fprintf(stderr,
524 " location %llu bytes (%llu blocks)\n",
525 (long long)byteoffset,
526 (long long)blkoffset);
527 } else if (blkoffset > 0) {
528 fprintf(stderr,
529 " offset %llu bytes (%llu blocks)\n",
530 (long long)byteoffset,
531 (long long)blkoffset);
532 }
533 }
534 block = scheme_metadata(SCHEME_META_PART_AFTER,
535 part->block + part->size);
536 }
537
538 mkimg_validate();
539
540 block = scheme_metadata(SCHEME_META_IMG_END, block);
541 error = image_set_size(block);
542 if (!error) {
543 error = capacity_resize(block);
544 block = image_get_size();
545 }
546 if (!error) {
547 error = format_resize(block);
548 block = image_get_size();
549 }
550 if (error)
551 errc(EX_IOERR, error, "image sizing");
552 ncyls = block / (nsecs * nheads);
553 error = scheme_write(block);
554 if (error)
555 errc(EX_IOERR, error, "writing metadata");
556 }
557
558 int
main(int argc,char * argv[])559 main(int argc, char *argv[])
560 {
561 const char *format_name;
562 int bcfd, outfd;
563 int c, error;
564
565 bcfd = -1;
566 outfd = 1; /* Write to stdout by default */
567 while ((c = getopt_long(argc, argv, "a:b:c:C:f:o:p:s:t:vyH:P:S:T:",
568 longopts, NULL)) != -1) {
569 switch (c) {
570 case 'a': /* ACTIVE PARTITION, if supported */
571 error = parse_uint32(&active_partition, 1, 100, optarg);
572 if (error)
573 errc(EX_DATAERR, error, "Partition ordinal");
574 break;
575 case 'b': /* BOOT CODE */
576 if (bcfd != -1)
577 usage("multiple bootcode given");
578 bcfd = open(optarg, O_RDONLY, 0);
579 if (bcfd == -1)
580 err(EX_UNAVAILABLE, "%s", optarg);
581 break;
582 case 'c': /* MINIMUM CAPACITY */
583 error = parse_uint64(&min_capacity, 1, INT64_MAX, optarg);
584 if (error)
585 errc(EX_DATAERR, error, "minimum capacity in bytes");
586 break;
587 case 'C': /* MAXIMUM CAPACITY */
588 error = parse_uint64(&max_capacity, 1, INT64_MAX, optarg);
589 if (error)
590 errc(EX_DATAERR, error, "maximum capacity in bytes");
591 break;
592 case 'f': /* OUTPUT FORMAT */
593 if (format_selected() != NULL)
594 usage("multiple formats given");
595 error = format_select(optarg);
596 if (error)
597 errc(EX_DATAERR, error, "format");
598 break;
599 case 'o': /* OUTPUT FILE */
600 if (outfd != 1)
601 usage("multiple output files given");
602 outfd = open(optarg, O_WRONLY | O_CREAT | O_TRUNC,
603 S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH);
604 if (outfd == -1)
605 err(EX_CANTCREAT, "%s", optarg);
606 break;
607 case 'p': /* PARTITION */
608 error = parse_part(optarg);
609 if (error)
610 errc(EX_DATAERR, error, "partition");
611 break;
612 case 's': /* SCHEME */
613 if (scheme_selected() != NULL)
614 usage("multiple schemes given");
615 error = scheme_select(optarg);
616 if (error)
617 errc(EX_DATAERR, error, "scheme");
618 break;
619 case 't': {
620 char *ep;
621 long long val;
622
623 errno = 0;
624 val = strtoll(optarg, &ep, 0);
625 if (ep == optarg || *ep != '\0')
626 errno = EINVAL;
627 if (errno != 0)
628 errc(EX_DATAERR, errno, "timestamp");
629 timestamp = (time_t)val;
630 break;
631 }
632 case 'y':
633 unit_testing++;
634 break;
635 case 'v':
636 verbose++;
637 break;
638 case 'H': /* GEOMETRY: HEADS */
639 error = parse_uint32(&nheads, 1, 255, optarg);
640 if (error)
641 errc(EX_DATAERR, error, "number of heads");
642 break;
643 case 'P': /* GEOMETRY: PHYSICAL SECTOR SIZE */
644 error = parse_uint32(&blksz, 512, INT_MAX+1U, optarg);
645 if (error == 0 && !pwr_of_two(blksz))
646 error = EINVAL;
647 if (error)
648 errc(EX_DATAERR, error, "physical sector size");
649 break;
650 case 'S': /* GEOMETRY: LOGICAL SECTOR SIZE */
651 error = parse_uint32(&secsz, 512, INT_MAX+1U, optarg);
652 if (error == 0 && !pwr_of_two(secsz))
653 error = EINVAL;
654 if (error)
655 errc(EX_DATAERR, error, "logical sector size");
656 break;
657 case 'T': /* GEOMETRY: TRACK SIZE */
658 error = parse_uint32(&nsecs, 1, 63, optarg);
659 if (error)
660 errc(EX_DATAERR, error, "track size");
661 break;
662 case LONGOPT_FORMATS:
663 print_formats(0);
664 exit(EX_OK);
665 /*NOTREACHED*/
666 case LONGOPT_SCHEMES:
667 print_schemes(0);
668 exit(EX_OK);
669 /*NOTREACHED*/
670 case LONGOPT_VERSION:
671 print_version();
672 exit(EX_OK);
673 /*NOTREACHED*/
674 case LONGOPT_CAPACITY:
675 error = parse_uint64(&min_capacity, 1, INT64_MAX, optarg);
676 if (error)
677 errc(EX_DATAERR, error, "capacity in bytes");
678 max_capacity = min_capacity;
679 break;
680 default:
681 usage("unknown option");
682 }
683 }
684
685 if (argc > optind)
686 usage("trailing arguments");
687 if (scheme_selected() == NULL && nparts > 0)
688 usage("no scheme");
689 if (nparts == 0 && min_capacity == 0)
690 usage("no partitions");
691 if (max_capacity != 0 && min_capacity > max_capacity)
692 usage("minimum capacity cannot be larger than the maximum one");
693
694 if (secsz > blksz) {
695 if (blksz != 0)
696 errx(EX_DATAERR, "the physical block size cannot "
697 "be smaller than the sector size");
698 blksz = secsz;
699 }
700
701 if (secsz > scheme_max_secsz())
702 errx(EX_DATAERR, "maximum sector size supported is %u; "
703 "size specified is %u", scheme_max_secsz(), secsz);
704
705 if (nparts > scheme_max_parts())
706 errx(EX_DATAERR, "%d partitions supported; %d given",
707 scheme_max_parts(), nparts);
708
709 if (format_selected() == NULL)
710 format_select("raw");
711
712 if (bcfd != -1) {
713 error = scheme_bootcode(bcfd);
714 close(bcfd);
715 if (error)
716 errc(EX_DATAERR, error, "boot code");
717 }
718
719 format_name = format_selected()->name;
720 if (verbose) {
721 fprintf(stderr, "Logical sector size: %u\n", secsz);
722 fprintf(stderr, "Physical block size: %u\n", blksz);
723 fprintf(stderr, "Sectors per track: %u\n", nsecs);
724 fprintf(stderr, "Number of heads: %u\n", nheads);
725 fputc('\n', stderr);
726 if (scheme_selected())
727 fprintf(stderr, "Partitioning scheme: %s\n",
728 scheme_selected()->name);
729 fprintf(stderr, "Output file format: %s\n",
730 format_name);
731 fputc('\n', stderr);
732 }
733
734 #if defined(SPARSE_WRITE)
735 /*
736 * sparse_write() fails if output is not seekable so fail early
737 * not wasting some load unless output format is raw
738 */
739 if (strcmp("raw", format_name) &&
740 lseek(outfd, (off_t)0, SEEK_CUR) == -1 && errno == ESPIPE)
741 errx(EX_USAGE, "%s: output must be seekable", format_name);
742 #endif
743
744 error = image_init();
745 if (error)
746 errc(EX_OSERR, error, "cannot initialize");
747
748 mkimg();
749
750 if (verbose) {
751 fputc('\n', stderr);
752 fprintf(stderr, "Number of cylinders: %u\n", ncyls);
753 }
754
755 error = format_write(outfd);
756 if (error)
757 errc(EX_IOERR, error, "writing image");
758
759 return (0);
760 }
761