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Actually hook powernow.4 into the build.
[dragonfly.git] / contrib / libarchive / libarchive / archive_read_support_format_cpio.c
blob56247dd1c6d47eaeefc0cbdfcee20b04a72bd58d
1 /*-
2 * Copyright (c) 2003-2007 Tim Kientzle
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(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "archive_platform.h"
27 __FBSDID("$FreeBSD: src/lib/libarchive/archive_read_support_format_cpio.c,v 1.27 2008/12/06 06:45:15 kientzle Exp $");
28
29 #ifdef HAVE_ERRNO_H
30 #include <errno.h>
31 #endif
32 /* #include <stdint.h> */ /* See archive_platform.h */
33 #ifdef HAVE_STDLIB_H
34 #include <stdlib.h>
35 #endif
36 #ifdef HAVE_STRING_H
37 #include <string.h>
38 #endif
39
40 #include "archive.h"
41 #include "archive_entry.h"
42 #include "archive_private.h"
43 #include "archive_read_private.h"
44
45 struct cpio_bin_header {
46 unsigned char c_magic[2];
47 unsigned char c_dev[2];
48 unsigned char c_ino[2];
49 unsigned char c_mode[2];
50 unsigned char c_uid[2];
51 unsigned char c_gid[2];
52 unsigned char c_nlink[2];
53 unsigned char c_rdev[2];
54 unsigned char c_mtime[4];
55 unsigned char c_namesize[2];
56 unsigned char c_filesize[4];
57 };
58
59 struct cpio_odc_header {
60 char c_magic[6];
61 char c_dev[6];
62 char c_ino[6];
63 char c_mode[6];
64 char c_uid[6];
65 char c_gid[6];
66 char c_nlink[6];
67 char c_rdev[6];
68 char c_mtime[11];
69 char c_namesize[6];
70 char c_filesize[11];
71 };
72
73 struct cpio_newc_header {
74 char c_magic[6];
75 char c_ino[8];
76 char c_mode[8];
77 char c_uid[8];
78 char c_gid[8];
79 char c_nlink[8];
80 char c_mtime[8];
81 char c_filesize[8];
82 char c_devmajor[8];
83 char c_devminor[8];
84 char c_rdevmajor[8];
85 char c_rdevminor[8];
86 char c_namesize[8];
87 char c_crc[8];
88 };
89
90 struct links_entry {
91 struct links_entry *next;
92 struct links_entry *previous;
93 int links;
94 dev_t dev;
95 ino_t ino;
96 char *name;
97 };
98
99 #define CPIO_MAGIC 0x13141516
100 struct cpio {
101 int magic;
102 int (*read_header)(struct archive_read *, struct cpio *,
103 struct archive_entry *, size_t *, size_t *);
104 struct links_entry *links_head;
105 struct archive_string entry_name;
106 struct archive_string entry_linkname;
107 off_t entry_bytes_remaining;
108 off_t entry_offset;
109 off_t entry_padding;
110 };
111
112 static int64_t atol16(const char *, unsigned);
113 static int64_t atol8(const char *, unsigned);
114 static int archive_read_format_cpio_bid(struct archive_read *);
115 static int archive_read_format_cpio_cleanup(struct archive_read *);
116 static int archive_read_format_cpio_read_data(struct archive_read *,
117 const void **, size_t *, off_t *);
118 static int archive_read_format_cpio_read_header(struct archive_read *,
119 struct archive_entry *);
120 static int be4(const unsigned char *);
121 static int find_odc_header(struct archive_read *);
122 static int find_newc_header(struct archive_read *);
123 static int header_bin_be(struct archive_read *, struct cpio *,
124 struct archive_entry *, size_t *, size_t *);
125 static int header_bin_le(struct archive_read *, struct cpio *,
126 struct archive_entry *, size_t *, size_t *);
127 static int header_newc(struct archive_read *, struct cpio *,
128 struct archive_entry *, size_t *, size_t *);
129 static int header_odc(struct archive_read *, struct cpio *,
130 struct archive_entry *, size_t *, size_t *);
131 static int is_octal(const char *, size_t);
132 static int is_hex(const char *, size_t);
133 static int le4(const unsigned char *);
134 static void record_hardlink(struct cpio *cpio, struct archive_entry *entry);
135
136 int
137 archive_read_support_format_cpio(struct archive *_a)
138 {
139 struct archive_read *a = (struct archive_read *)_a;
140 struct cpio *cpio;
141 int r;
142
143 cpio = (struct cpio *)malloc(sizeof(*cpio));
144 if (cpio == NULL) {
145 archive_set_error(&a->archive, ENOMEM, "Can't allocate cpio data");
146 return (ARCHIVE_FATAL);
147 }
148 memset(cpio, 0, sizeof(*cpio));
149 cpio->magic = CPIO_MAGIC;
150
151 r = __archive_read_register_format(a,
152 cpio,
153 "cpio",
154 archive_read_format_cpio_bid,
155 NULL,
156 archive_read_format_cpio_read_header,
157 archive_read_format_cpio_read_data,
158 NULL,
159 archive_read_format_cpio_cleanup);
160
161 if (r != ARCHIVE_OK)
162 free(cpio);
163 return (ARCHIVE_OK);
164 }
165
166
167 static int
168 archive_read_format_cpio_bid(struct archive_read *a)
169 {
170 const void *h;
171 const unsigned char *p;
172 struct cpio *cpio;
173 int bid;
174
175 cpio = (struct cpio *)(a->format->data);
176
177 if ((h = __archive_read_ahead(a, 6, NULL)) == NULL)
178 return (-1);
179
180 p = (const unsigned char *)h;
181 bid = 0;
182 if (memcmp(p, "070707", 6) == 0) {
183 /* ASCII cpio archive (odc, POSIX.1) */
184 cpio->read_header = header_odc;
185 bid += 48;
186 /*
187 * XXX TODO: More verification; Could check that only octal
188 * digits appear in appropriate header locations. XXX
189 */
190 } else if (memcmp(p, "070701", 6) == 0) {
191 /* ASCII cpio archive (SVR4 without CRC) */
192 cpio->read_header = header_newc;
193 bid += 48;
194 /*
195 * XXX TODO: More verification; Could check that only hex
196 * digits appear in appropriate header locations. XXX
197 */
198 } else if (memcmp(p, "070702", 6) == 0) {
199 /* ASCII cpio archive (SVR4 with CRC) */
200 /* XXX TODO: Flag that we should check the CRC. XXX */
201 cpio->read_header = header_newc;
202 bid += 48;
203 /*
204 * XXX TODO: More verification; Could check that only hex
205 * digits appear in appropriate header locations. XXX
206 */
207 } else if (p[0] * 256 + p[1] == 070707) {
208 /* big-endian binary cpio archives */
209 cpio->read_header = header_bin_be;
210 bid += 16;
211 /* Is more verification possible here? */
212 } else if (p[0] + p[1] * 256 == 070707) {
213 /* little-endian binary cpio archives */
214 cpio->read_header = header_bin_le;
215 bid += 16;
216 /* Is more verification possible here? */
217 } else
218 return (ARCHIVE_WARN);
219
220 return (bid);
221 }
222
223 static int
224 archive_read_format_cpio_read_header(struct archive_read *a,
225 struct archive_entry *entry)
226 {
227 struct cpio *cpio;
228 const void *h;
229 size_t namelength;
230 size_t name_pad;
231 int r;
232
233 cpio = (struct cpio *)(a->format->data);
234 r = (cpio->read_header(a, cpio, entry, &namelength, &name_pad));
235
236 if (r < ARCHIVE_WARN)
237 return (r);
238
239 /* Read name from buffer. */
240 h = __archive_read_ahead(a, namelength + name_pad, NULL);
241 if (h == NULL)
242 return (ARCHIVE_FATAL);
243 __archive_read_consume(a, namelength + name_pad);
244 archive_strncpy(&cpio->entry_name, (const char *)h, namelength);
245 archive_entry_set_pathname(entry, cpio->entry_name.s);
246 cpio->entry_offset = 0;
247
248 /* If this is a symlink, read the link contents. */
249 if (archive_entry_filetype(entry) == AE_IFLNK) {
250 h = __archive_read_ahead(a, cpio->entry_bytes_remaining, NULL);
251 if (h == NULL)
252 return (ARCHIVE_FATAL);
253 __archive_read_consume(a, cpio->entry_bytes_remaining);
254 archive_strncpy(&cpio->entry_linkname, (const char *)h,
255 cpio->entry_bytes_remaining);
256 archive_entry_set_symlink(entry, cpio->entry_linkname.s);
257 cpio->entry_bytes_remaining = 0;
258 }
259
260 /* Compare name to "TRAILER!!!" to test for end-of-archive. */
261 if (namelength == 11 && strcmp((const char *)h, "TRAILER!!!") == 0) {
262 /* TODO: Store file location of start of block. */
263 archive_set_error(&a->archive, 0, NULL);
264 return (ARCHIVE_EOF);
265 }
266
267 /* Detect and record hardlinks to previously-extracted entries. */
268 record_hardlink(cpio, entry);
269
270 return (r);
271 }
272
273 static int
274 archive_read_format_cpio_read_data(struct archive_read *a,
275 const void **buff, size_t *size, off_t *offset)
276 {
277 ssize_t bytes_read;
278 struct cpio *cpio;
279
280 cpio = (struct cpio *)(a->format->data);
281 if (cpio->entry_bytes_remaining > 0) {
282 *buff = __archive_read_ahead(a, 1, &bytes_read);
283 if (bytes_read <= 0)
284 return (ARCHIVE_FATAL);
285 if (bytes_read > cpio->entry_bytes_remaining)
286 bytes_read = cpio->entry_bytes_remaining;
287 *size = bytes_read;
288 *offset = cpio->entry_offset;
289 cpio->entry_offset += bytes_read;
290 cpio->entry_bytes_remaining -= bytes_read;
291 __archive_read_consume(a, bytes_read);
292 return (ARCHIVE_OK);
293 } else {
294 while (cpio->entry_padding > 0) {
295 *buff = __archive_read_ahead(a, 1, &bytes_read);
296 if (bytes_read <= 0)
297 return (ARCHIVE_FATAL);
298 if (bytes_read > cpio->entry_padding)
299 bytes_read = cpio->entry_padding;
300 __archive_read_consume(a, bytes_read);
301 cpio->entry_padding -= bytes_read;
302 }
303 *buff = NULL;
304 *size = 0;
305 *offset = cpio->entry_offset;
306 return (ARCHIVE_EOF);
307 }
308 }
309
310 /*
311 * Skip forward to the next cpio newc header by searching for the
312 * 07070[12] string. This should be generalized and merged with
313 * find_odc_header below.
314 */
315 static int
316 is_hex(const char *p, size_t len)
317 {
318 while (len-- > 0) {
319 if ((*p >= '0' && *p <= '9')
320 || (*p >= 'a' && *p <= 'f')
321 || (*p >= 'A' && *p <= 'F'))
322 ++p;
323 else
324 return (0);
325 }
326 return (1);
327 }
328
329 static int
330 find_newc_header(struct archive_read *a)
331 {
332 const void *h;
333 const char *p, *q;
334 size_t skip, skipped = 0;
335 ssize_t bytes;
336
337 for (;;) {
338 h = __archive_read_ahead(a, sizeof(struct cpio_newc_header), &bytes);
339 if (h == NULL)
340 return (ARCHIVE_FATAL);
341 p = h;
342 q = p + bytes;
343
344 /* Try the typical case first, then go into the slow search.*/
345 if (memcmp("07070", p, 5) == 0
346 && (p[5] == '1' || p[5] == '2')
347 && is_hex(p, sizeof(struct cpio_newc_header)))
348 return (ARCHIVE_OK);
349
350 /*
351 * Scan ahead until we find something that looks
352 * like an odc header.
353 */
354 while (p + sizeof(struct cpio_newc_header) < q) {
355 switch (p[5]) {
356 case '1':
357 case '2':
358 if (memcmp("07070", p, 5) == 0
359 && is_hex(p, sizeof(struct cpio_newc_header))) {
360 skip = p - (const char *)h;
361 __archive_read_consume(a, skip);
362 skipped += skip;
363 if (skipped > 0) {
364 archive_set_error(&a->archive,
365 0,
366 "Skipped %d bytes before "
367 "finding valid header",
368 (int)skipped);
369 return (ARCHIVE_WARN);
370 }
371 return (ARCHIVE_OK);
372 }
373 p += 2;
374 break;
375 case '0':
376 p++;
377 break;
378 default:
379 p += 6;
380 break;
381 }
382 }
383 skip = p - (const char *)h;
384 __archive_read_consume(a, skip);
385 skipped += skip;
386 }
387 }
388
389 static int
390 header_newc(struct archive_read *a, struct cpio *cpio,
391 struct archive_entry *entry, size_t *namelength, size_t *name_pad)
392 {
393 const void *h;
394 const struct cpio_newc_header *header;
395 int r;
396
397 r = find_newc_header(a);
398 if (r < ARCHIVE_WARN)
399 return (r);
400
401 /* Read fixed-size portion of header. */
402 h = __archive_read_ahead(a, sizeof(struct cpio_newc_header), NULL);
403 if (h == NULL)
404 return (ARCHIVE_FATAL);
405 __archive_read_consume(a, sizeof(struct cpio_newc_header));
406
407 /* Parse out hex fields. */
408 header = (const struct cpio_newc_header *)h;
409
410 if (memcmp(header->c_magic, "070701", 6) == 0) {
411 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_NOCRC;
412 a->archive.archive_format_name = "ASCII cpio (SVR4 with no CRC)";
413 } else if (memcmp(header->c_magic, "070702", 6) == 0) {
414 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_SVR4_CRC;
415 a->archive.archive_format_name = "ASCII cpio (SVR4 with CRC)";
416 } else {
417 /* TODO: Abort here? */
418 }
419
420 archive_entry_set_devmajor(entry, atol16(header->c_devmajor, sizeof(header->c_devmajor)));
421 archive_entry_set_devminor(entry, atol16(header->c_devminor, sizeof(header->c_devminor)));
422 archive_entry_set_ino(entry, atol16(header->c_ino, sizeof(header->c_ino)));
423 archive_entry_set_mode(entry, atol16(header->c_mode, sizeof(header->c_mode)));
424 archive_entry_set_uid(entry, atol16(header->c_uid, sizeof(header->c_uid)));
425 archive_entry_set_gid(entry, atol16(header->c_gid, sizeof(header->c_gid)));
426 archive_entry_set_nlink(entry, atol16(header->c_nlink, sizeof(header->c_nlink)));
427 archive_entry_set_rdevmajor(entry, atol16(header->c_rdevmajor, sizeof(header->c_rdevmajor)));
428 archive_entry_set_rdevminor(entry, atol16(header->c_rdevminor, sizeof(header->c_rdevminor)));
429 archive_entry_set_mtime(entry, atol16(header->c_mtime, sizeof(header->c_mtime)), 0);
430 *namelength = atol16(header->c_namesize, sizeof(header->c_namesize));
431 /* Pad name to 2 more than a multiple of 4. */
432 *name_pad = (2 - *namelength) & 3;
433
434 /*
435 * Note: entry_bytes_remaining is at least 64 bits and
436 * therefore guaranteed to be big enough for a 33-bit file
437 * size.
438 */
439 cpio->entry_bytes_remaining =
440 atol16(header->c_filesize, sizeof(header->c_filesize));
441 archive_entry_set_size(entry, cpio->entry_bytes_remaining);
442 /* Pad file contents to a multiple of 4. */
443 cpio->entry_padding = 3 & -cpio->entry_bytes_remaining;
444 return (r);
445 }
446
447 /*
448 * Skip forward to the next cpio odc header by searching for the
449 * 070707 string. This is a hand-optimized search that could
450 * probably be easily generalized to handle all character-based
451 * cpio variants.
452 */
453 static int
454 is_octal(const char *p, size_t len)
455 {
456 while (len-- > 0) {
457 if (*p < '0' || *p > '7')
458 return (0);
459 ++p;
460 }
461 return (1);
462 }
463
464 static int
465 find_odc_header(struct archive_read *a)
466 {
467 const void *h;
468 const char *p, *q;
469 size_t skip, skipped = 0;
470 ssize_t bytes;
471
472 for (;;) {
473 h = __archive_read_ahead(a, sizeof(struct cpio_odc_header), &bytes);
474 if (h == NULL)
475 return (ARCHIVE_FATAL);
476 p = h;
477 q = p + bytes;
478
479 /* Try the typical case first, then go into the slow search.*/
480 if (memcmp("070707", p, 6) == 0
481 && is_octal(p, sizeof(struct cpio_odc_header)))
482 return (ARCHIVE_OK);
483
484 /*
485 * Scan ahead until we find something that looks
486 * like an odc header.
487 */
488 while (p + sizeof(struct cpio_odc_header) < q) {
489 switch (p[5]) {
490 case '7':
491 if (memcmp("070707", p, 6) == 0
492 && is_octal(p, sizeof(struct cpio_odc_header))) {
493 skip = p - (const char *)h;
494 __archive_read_consume(a, skip);
495 skipped += skip;
496 if (skipped > 0) {
497 archive_set_error(&a->archive,
498 0,
499 "Skipped %d bytes before "
500 "finding valid header",
501 (int)skipped);
502 return (ARCHIVE_WARN);
503 }
504 return (ARCHIVE_OK);
505 }
506 p += 2;
507 break;
508 case '0':
509 p++;
510 break;
511 default:
512 p += 6;
513 break;
514 }
515 }
516 skip = p - (const char *)h;
517 __archive_read_consume(a, skip);
518 skipped += skip;
519 }
520 }
521
522 static int
523 header_odc(struct archive_read *a, struct cpio *cpio,
524 struct archive_entry *entry, size_t *namelength, size_t *name_pad)
525 {
526 const void *h;
527 int r;
528 const struct cpio_odc_header *header;
529
530 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_POSIX;
531 a->archive.archive_format_name = "POSIX octet-oriented cpio";
532
533 /* Find the start of the next header. */
534 r = find_odc_header(a);
535 if (r < ARCHIVE_WARN)
536 return (r);
537
538 /* Read fixed-size portion of header. */
539 h = __archive_read_ahead(a, sizeof(struct cpio_odc_header), NULL);
540 if (h == NULL)
541 return (ARCHIVE_FATAL);
542 __archive_read_consume(a, sizeof(struct cpio_odc_header));
543
544 /* Parse out octal fields. */
545 header = (const struct cpio_odc_header *)h;
546
547 archive_entry_set_dev(entry, atol8(header->c_dev, sizeof(header->c_dev)));
548 archive_entry_set_ino(entry, atol8(header->c_ino, sizeof(header->c_ino)));
549 archive_entry_set_mode(entry, atol8(header->c_mode, sizeof(header->c_mode)));
550 archive_entry_set_uid(entry, atol8(header->c_uid, sizeof(header->c_uid)));
551 archive_entry_set_gid(entry, atol8(header->c_gid, sizeof(header->c_gid)));
552 archive_entry_set_nlink(entry, atol8(header->c_nlink, sizeof(header->c_nlink)));
553 archive_entry_set_rdev(entry, atol8(header->c_rdev, sizeof(header->c_rdev)));
554 archive_entry_set_mtime(entry, atol8(header->c_mtime, sizeof(header->c_mtime)), 0);
555 *namelength = atol8(header->c_namesize, sizeof(header->c_namesize));
556 *name_pad = 0; /* No padding of filename. */
557
558 /*
559 * Note: entry_bytes_remaining is at least 64 bits and
560 * therefore guaranteed to be big enough for a 33-bit file
561 * size.
562 */
563 cpio->entry_bytes_remaining =
564 atol8(header->c_filesize, sizeof(header->c_filesize));
565 archive_entry_set_size(entry, cpio->entry_bytes_remaining);
566 cpio->entry_padding = 0;
567 return (r);
568 }
569
570 static int
571 header_bin_le(struct archive_read *a, struct cpio *cpio,
572 struct archive_entry *entry, size_t *namelength, size_t *name_pad)
573 {
574 const void *h;
575 const struct cpio_bin_header *header;
576
577 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_BIN_LE;
578 a->archive.archive_format_name = "cpio (little-endian binary)";
579
580 /* Read fixed-size portion of header. */
581 h = __archive_read_ahead(a, sizeof(struct cpio_bin_header), NULL);
582 if (h == NULL)
583 return (ARCHIVE_FATAL);
584 __archive_read_consume(a, sizeof(struct cpio_bin_header));
585
586 /* Parse out binary fields. */
587 header = (const struct cpio_bin_header *)h;
588
589 archive_entry_set_dev(entry, header->c_dev[0] + header->c_dev[1] * 256);
590 archive_entry_set_ino(entry, header->c_ino[0] + header->c_ino[1] * 256);
591 archive_entry_set_mode(entry, header->c_mode[0] + header->c_mode[1] * 256);
592 archive_entry_set_uid(entry, header->c_uid[0] + header->c_uid[1] * 256);
593 archive_entry_set_gid(entry, header->c_gid[0] + header->c_gid[1] * 256);
594 archive_entry_set_nlink(entry, header->c_nlink[0] + header->c_nlink[1] * 256);
595 archive_entry_set_rdev(entry, header->c_rdev[0] + header->c_rdev[1] * 256);
596 archive_entry_set_mtime(entry, le4(header->c_mtime), 0);
597 *namelength = header->c_namesize[0] + header->c_namesize[1] * 256;
598 *name_pad = *namelength & 1; /* Pad to even. */
599
600 cpio->entry_bytes_remaining = le4(header->c_filesize);
601 archive_entry_set_size(entry, cpio->entry_bytes_remaining);
602 cpio->entry_padding = cpio->entry_bytes_remaining & 1; /* Pad to even. */
603 return (ARCHIVE_OK);
604 }
605
606 static int
607 header_bin_be(struct archive_read *a, struct cpio *cpio,
608 struct archive_entry *entry, size_t *namelength, size_t *name_pad)
609 {
610 const void *h;
611 const struct cpio_bin_header *header;
612
613 a->archive.archive_format = ARCHIVE_FORMAT_CPIO_BIN_BE;
614 a->archive.archive_format_name = "cpio (big-endian binary)";
615
616 /* Read fixed-size portion of header. */
617 h = __archive_read_ahead(a, sizeof(struct cpio_bin_header), NULL);
618 if (h == NULL)
619 return (ARCHIVE_FATAL);
620 __archive_read_consume(a, sizeof(struct cpio_bin_header));
621
622 /* Parse out binary fields. */
623 header = (const struct cpio_bin_header *)h;
624 archive_entry_set_dev(entry, header->c_dev[0] * 256 + header->c_dev[1]);
625 archive_entry_set_ino(entry, header->c_ino[0] * 256 + header->c_ino[1]);
626 archive_entry_set_mode(entry, header->c_mode[0] * 256 + header->c_mode[1]);
627 archive_entry_set_uid(entry, header->c_uid[0] * 256 + header->c_uid[1]);
628 archive_entry_set_gid(entry, header->c_gid[0] * 256 + header->c_gid[1]);
629 archive_entry_set_nlink(entry, header->c_nlink[0] * 256 + header->c_nlink[1]);
630 archive_entry_set_rdev(entry, header->c_rdev[0] * 256 + header->c_rdev[1]);
631 archive_entry_set_mtime(entry, be4(header->c_mtime), 0);
632 *namelength = header->c_namesize[0] * 256 + header->c_namesize[1];
633 *name_pad = *namelength & 1; /* Pad to even. */
634
635 cpio->entry_bytes_remaining = be4(header->c_filesize);
636 archive_entry_set_size(entry, cpio->entry_bytes_remaining);
637 cpio->entry_padding = cpio->entry_bytes_remaining & 1; /* Pad to even. */
638 return (ARCHIVE_OK);
639 }
640
641 static int
642 archive_read_format_cpio_cleanup(struct archive_read *a)
643 {
644 struct cpio *cpio;
645
646 cpio = (struct cpio *)(a->format->data);
647 /* Free inode->name map */
648 while (cpio->links_head != NULL) {
649 struct links_entry *lp = cpio->links_head->next;
650
651 if (cpio->links_head->name)
652 free(cpio->links_head->name);
653 free(cpio->links_head);
654 cpio->links_head = lp;
655 }
656 archive_string_free(&cpio->entry_name);
657 free(cpio);
658 (a->format->data) = NULL;
659 return (ARCHIVE_OK);
660 }
661
662 static int
663 le4(const unsigned char *p)
664 {
665 return ((p[0]<<16) + (p[1]<<24) + (p[2]<<0) + (p[3]<<8));
666 }
667
668
669 static int
670 be4(const unsigned char *p)
671 {
672 return (p[0] + (p[1]<<8) + (p[2]<<16) + (p[3]<<24));
673 }
674
675 /*
676 * Note that this implementation does not (and should not!) obey
677 * locale settings; you cannot simply substitute strtol here, since
678 * it does obey locale.
679 */
680 static int64_t
681 atol8(const char *p, unsigned char_cnt)
682 {
683 int64_t l;
684 int digit;
685
686 l = 0;
687 while (char_cnt-- > 0) {
688 if (*p >= '0' && *p <= '7')
689 digit = *p - '0';
690 else
691 return (l);
692 p++;
693 l <<= 3;
694 l |= digit;
695 }
696 return (l);
697 }
698
699 static int64_t
700 atol16(const char *p, unsigned char_cnt)
701 {
702 int64_t l;
703 int digit;
704
705 l = 0;
706 while (char_cnt-- > 0) {
707 if (*p >= 'a' && *p <= 'f')
708 digit = *p - 'a' + 10;
709 else if (*p >= 'A' && *p <= 'F')
710 digit = *p - 'A' + 10;
711 else if (*p >= '0' && *p <= '9')
712 digit = *p - '0';
713 else
714 return (l);
715 p++;
716 l <<= 4;
717 l |= digit;
718 }
719 return (l);
720 }
721
722 static void
723 record_hardlink(struct cpio *cpio, struct archive_entry *entry)
724 {
725 struct links_entry *le;
726 dev_t dev;
727 ino_t ino;
728
729 dev = archive_entry_dev(entry);
730 ino = archive_entry_ino(entry);
731
732 /*
733 * First look in the list of multiply-linked files. If we've
734 * already dumped it, convert this entry to a hard link entry.
735 */
736 for (le = cpio->links_head; le; le = le->next) {
737 if (le->dev == dev && le->ino == ino) {
738 archive_entry_copy_hardlink(entry, le->name);
739
740 if (--le->links <= 0) {
741 if (le->previous != NULL)
742 le->previous->next = le->next;
743 if (le->next != NULL)
744 le->next->previous = le->previous;
745 if (cpio->links_head == le)
746 cpio->links_head = le->next;
747 free(le->name);
748 free(le);
749 }
750
751 return;
752 }
753 }
754
755 le = (struct links_entry *)malloc(sizeof(struct links_entry));
756 if (le == NULL)
757 __archive_errx(1, "Out of memory adding file to list");
758 if (cpio->links_head != NULL)
759 cpio->links_head->previous = le;
760 le->next = cpio->links_head;
761 le->previous = NULL;
762 cpio->links_head = le;
763 le->dev = dev;
764 le->ino = ino;
765 le->links = archive_entry_nlink(entry) - 1;
766 le->name = strdup(archive_entry_pathname(entry));
767 if (le->name == NULL)
768 __archive_errx(1, "Out of memory adding file to list");
769 }
DragonFly BSD