1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2003-2007 Tim Kientzle
5 * Copyright (c) 2012 Michihiro NAKAJIMA
6 * All rights reserved.
7 */
8
9 #include "bsdtar_platform.h"
10
11 #ifdef HAVE_SYS_TYPES_H
12 #include <sys/types.h>
13 #endif
14 #ifdef HAVE_SYS_STAT_H
15 #include <sys/stat.h>
16 #endif
17 #if HAVE_SYS_XATTR_H
18 #include <sys/xattr.h>
19 #elif HAVE_ATTR_XATTR_H
20 #include <attr/xattr.h>
21 #endif
22 #ifdef HAVE_ERRNO_H
23 #include <errno.h>
24 #endif
25 #ifdef HAVE_FCNTL_H
26 #include <fcntl.h>
27 #endif
28 #ifdef HAVE_GRP_H
29 #include <grp.h>
30 #endif
31 #ifdef HAVE_IO_H
32 #include <io.h>
33 #endif
34 #ifdef HAVE_LIBGEN_H
35 #include <libgen.h>
36 #endif
37 #ifdef HAVE_LIMITS_H
38 #include <limits.h>
39 #endif
40 #ifdef HAVE_PATHS_H
41 #include <paths.h>
42 #endif
43 #ifdef HAVE_PWD_H
44 #include <pwd.h>
45 #endif
46 #ifdef HAVE_STDINT_H
47 #include <stdint.h>
48 #endif
49 #include <stdio.h>
50 #ifdef HAVE_STDLIB_H
51 #include <stdlib.h>
52 #endif
53 #ifdef HAVE_STRING_H
54 #include <string.h>
55 #endif
56 #ifdef HAVE_UNISTD_H
57 #include <unistd.h>
58 #endif
59
60 #include "bsdtar.h"
61 #include "err.h"
62 #include "line_reader.h"
63
64 #ifndef O_BINARY
65 #define O_BINARY 0
66 #endif
67
68 struct archive_dir_entry {
69 struct archive_dir_entry *next;
70 time_t mtime_sec;
71 int mtime_nsec;
72 char *name;
73 };
74
75 struct archive_dir {
76 struct archive_dir_entry *head, *tail;
77 };
78
79 static int append_archive(struct bsdtar *, struct archive *,
80 struct archive *ina);
81 static int append_archive_filename(struct bsdtar *,
82 struct archive *, const char *fname);
83 static void archive_names_from_file(struct bsdtar *bsdtar,
84 struct archive *a);
85 static int copy_file_data_block(struct bsdtar *,
86 struct archive *a, struct archive *,
87 struct archive_entry *);
88 static void excluded_callback(struct archive *, void *,
89 struct archive_entry *);
90 static void report_write(struct bsdtar *, struct archive *,
91 struct archive_entry *, int64_t progress);
92 static void test_for_append(struct bsdtar *);
93 static int metadata_filter(struct archive *, void *,
94 struct archive_entry *);
95 static void write_archive(struct archive *, struct bsdtar *);
96 static void write_entry(struct bsdtar *, struct archive *,
97 struct archive_entry *);
98 static void write_file(struct bsdtar *, struct archive *,
99 struct archive_entry *);
100 static void write_hierarchy(struct bsdtar *, struct archive *,
101 const char *);
102
103 #if defined(_WIN32) && !defined(__CYGWIN__)
104 /* Not a full lseek() emulation, but enough for our needs here. */
105 static int
seek_file(int fd,int64_t offset,int whence)106 seek_file(int fd, int64_t offset, int whence)
107 {
108 LARGE_INTEGER distance;
109 (void)whence; /* UNUSED */
110 distance.QuadPart = offset;
111 return (SetFilePointerEx((HANDLE)_get_osfhandle(fd),
112 distance, NULL, FILE_BEGIN) ? 1 : -1);
113 }
114 #define open _open
115 #define close _close
116 #define read _read
117 #ifdef lseek
118 #undef lseek
119 #endif
120 #define lseek seek_file
121 #endif
122
123 static void
set_writer_options(struct bsdtar * bsdtar,struct archive * a)124 set_writer_options(struct bsdtar *bsdtar, struct archive *a)
125 {
126 const char *writer_options;
127 int r;
128
129 writer_options = getenv(ENV_WRITER_OPTIONS);
130 if (writer_options != NULL) {
131 size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1;
132 size_t opt_len = strlen(writer_options) + 1;
133 char *p;
134 /* Set default write options. */
135 if ((p = malloc(module_len + opt_len)) == NULL)
136 lafe_errc(1, errno, "Out of memory");
137 /* Prepend magic code to ignore options for
138 * a format or filters which are not added to
139 * the archive write object. */
140 memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len);
141 memcpy(p, writer_options, opt_len);
142 r = archive_write_set_options(a, p);
143 free(p);
144 if (r < ARCHIVE_WARN)
145 lafe_errc(1, 0, "%s", archive_error_string(a));
146 else
147 archive_clear_error(a);
148 }
149 if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options))
150 lafe_errc(1, 0, "%s", archive_error_string(a));
151 }
152
153 static void
set_reader_options(struct bsdtar * bsdtar,struct archive * a)154 set_reader_options(struct bsdtar *bsdtar, struct archive *a)
155 {
156 const char *reader_options;
157 int r;
158
159 (void)bsdtar; /* UNUSED */
160
161 reader_options = getenv(ENV_READER_OPTIONS);
162 if (reader_options != NULL) {
163 size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1;
164 size_t opt_len = strlen(reader_options) + 1;
165 char *p;
166 /* Set default write options. */
167 if ((p = malloc(module_len + opt_len)) == NULL)
168 if (p == NULL)
169 lafe_errc(1, errno, "Out of memory");
170 /* Prepend magic code to ignore options for
171 * a format or filters which are not added to
172 * the archive write object. */
173 memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len);
174 memcpy(p, reader_options, opt_len);
175 r = archive_read_set_options(a, p);
176 free(p);
177 if (r < ARCHIVE_WARN)
178 lafe_errc(1, 0, "%s", archive_error_string(a));
179 else
180 archive_clear_error(a);
181 }
182 if (bsdtar->flags & OPTFLAG_IGNORE_ZEROS)
183 if (archive_read_set_options(a,
184 "read_concatenated_archives") != ARCHIVE_OK)
185 lafe_errc(1, 0, "%s", archive_error_string(a));
186 }
187
188 void
tar_mode_c(struct bsdtar * bsdtar)189 tar_mode_c(struct bsdtar *bsdtar)
190 {
191 struct archive *a;
192 const void *filter_name;
193 int r;
194
195 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL)
196 lafe_errc(1, 0, "no files or directories specified");
197
198 a = archive_write_new();
199
200 /* Support any format that the library supports. */
201 if (cset_get_format(bsdtar->cset) == NULL) {
202 r = archive_write_set_format_pax_restricted(a);
203 cset_set_format(bsdtar->cset, "pax restricted");
204 } else {
205 r = archive_write_set_format_by_name(a,
206 cset_get_format(bsdtar->cset));
207 }
208 if (r != ARCHIVE_OK) {
209 fprintf(stderr, "Can't use format %s: %s\n",
210 cset_get_format(bsdtar->cset),
211 archive_error_string(a));
212 usage();
213 }
214
215 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block);
216 archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block);
217
218 r = cset_write_add_filters(bsdtar->cset, a, &filter_name);
219 if (r < ARCHIVE_WARN) {
220 lafe_errc(1, 0, "Unsupported compression option --%s",
221 (const char *)filter_name);
222 }
223
224 set_writer_options(bsdtar, a);
225 if (bsdtar->passphrase != NULL)
226 r = archive_write_set_passphrase(a, bsdtar->passphrase);
227 else
228 r = archive_write_set_passphrase_callback(a, bsdtar,
229 &passphrase_callback);
230 if (r != ARCHIVE_OK)
231 lafe_errc(1, 0, "%s", archive_error_string(a));
232 if (ARCHIVE_OK != archive_write_open_filename(a, bsdtar->filename))
233 lafe_errc(1, 0, "%s", archive_error_string(a));
234 write_archive(a, bsdtar);
235 }
236
237 /*
238 * Same as 'c', except we only support tar or empty formats in
239 * uncompressed files on disk.
240 */
241 void
tar_mode_r(struct bsdtar * bsdtar)242 tar_mode_r(struct bsdtar *bsdtar)
243 {
244 int64_t end_offset;
245 int format;
246 struct archive *a;
247 struct archive_entry *entry;
248 int r;
249
250 /* Sanity-test some arguments and the file. */
251 test_for_append(bsdtar);
252
253 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
254
255 #if defined(__BORLANDC__)
256 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY);
257 #else
258 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY, 0666);
259 #endif
260 if (bsdtar->fd < 0)
261 lafe_errc(1, errno,
262 "Cannot open %s", bsdtar->filename);
263
264 a = archive_read_new();
265 archive_read_support_filter_all(a);
266 archive_read_support_format_empty(a);
267 archive_read_support_format_tar(a);
268 archive_read_support_format_gnutar(a);
269 set_reader_options(bsdtar, a);
270 r = archive_read_open_fd(a, bsdtar->fd, 10240);
271 if (r != ARCHIVE_OK)
272 lafe_errc(1, archive_errno(a),
273 "Can't read archive %s: %s", bsdtar->filename,
274 archive_error_string(a));
275 while (0 == archive_read_next_header(a, &entry)) {
276 if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) {
277 archive_read_free(a);
278 close(bsdtar->fd);
279 lafe_errc(1, 0,
280 "Cannot append to compressed archive.");
281 }
282 /* Keep going until we hit end-of-archive */
283 format = archive_format(a);
284 }
285
286 end_offset = archive_read_header_position(a);
287 archive_read_free(a);
288
289 /* Re-open archive for writing */
290 a = archive_write_new();
291 /*
292 * Set the format to be used for writing. To allow people to
293 * extend empty files, we need to allow them to specify the format,
294 * which opens the possibility that they will specify a format that
295 * doesn't match the existing format. Hence, the following bit
296 * of arcane ugliness.
297 */
298
299 if (cset_get_format(bsdtar->cset) != NULL) {
300 /* If the user requested a format, use that, but ... */
301 archive_write_set_format_by_name(a,
302 cset_get_format(bsdtar->cset));
303 /* ... complain if it's not compatible. */
304 format &= ARCHIVE_FORMAT_BASE_MASK;
305 if (format != (int)(archive_format(a) & ARCHIVE_FORMAT_BASE_MASK)
306 && format != ARCHIVE_FORMAT_EMPTY) {
307 lafe_errc(1, 0,
308 "Format %s is incompatible with the archive %s.",
309 cset_get_format(bsdtar->cset), bsdtar->filename);
310 }
311 } else {
312 /*
313 * Just preserve the current format, with a little care
314 * for formats that libarchive can't write.
315 */
316 if (format == ARCHIVE_FORMAT_EMPTY)
317 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
318 archive_write_set_format(a, format);
319 }
320 if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0)
321 lafe_errc(1, errno, "Could not seek to archive end");
322 set_writer_options(bsdtar, a);
323 if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd))
324 lafe_errc(1, 0, "%s", archive_error_string(a));
325
326 write_archive(a, bsdtar); /* XXX check return val XXX */
327
328 close(bsdtar->fd);
329 bsdtar->fd = -1;
330 }
331
332 void
tar_mode_u(struct bsdtar * bsdtar)333 tar_mode_u(struct bsdtar *bsdtar)
334 {
335 int64_t end_offset;
336 struct archive *a;
337 struct archive_entry *entry;
338 int format;
339 struct archive_dir_entry *p;
340 struct archive_dir archive_dir;
341
342 bsdtar->archive_dir = &archive_dir;
343 memset(&archive_dir, 0, sizeof(archive_dir));
344
345 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
346
347 /* Sanity-test some arguments and the file. */
348 test_for_append(bsdtar);
349
350 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_BINARY);
351 if (bsdtar->fd < 0)
352 lafe_errc(1, errno,
353 "Cannot open %s", bsdtar->filename);
354
355 a = archive_read_new();
356 archive_read_support_filter_all(a);
357 archive_read_support_format_tar(a);
358 archive_read_support_format_gnutar(a);
359 set_reader_options(bsdtar, a);
360 if (archive_read_open_fd(a, bsdtar->fd, bsdtar->bytes_per_block)
361 != ARCHIVE_OK) {
362 lafe_errc(1, 0,
363 "Can't open %s: %s", bsdtar->filename,
364 archive_error_string(a));
365 }
366
367 /* Build a list of all entries and their recorded mod times. */
368 while (0 == archive_read_next_header(a, &entry)) {
369 if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) {
370 archive_read_free(a);
371 close(bsdtar->fd);
372 lafe_errc(1, 0,
373 "Cannot append to compressed archive.");
374 }
375 if (archive_match_exclude_entry(bsdtar->matching,
376 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER |
377 ARCHIVE_MATCH_EQUAL, entry) != ARCHIVE_OK)
378 lafe_errc(1, 0, "Error : %s",
379 archive_error_string(bsdtar->matching));
380 /* Record the last format determination we see */
381 format = archive_format(a);
382 /* Keep going until we hit end-of-archive */
383 }
384
385 end_offset = archive_read_header_position(a);
386 archive_read_free(a);
387
388 /* Re-open archive for writing. */
389 a = archive_write_new();
390 /*
391 * Set format to same one auto-detected above.
392 */
393 archive_write_set_format(a, format);
394 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block);
395 archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block);
396
397 if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0)
398 lafe_errc(1, errno, "Could not seek to archive end");
399 set_writer_options(bsdtar, a);
400 if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd))
401 lafe_errc(1, 0, "%s", archive_error_string(a));
402
403 write_archive(a, bsdtar);
404
405 close(bsdtar->fd);
406 bsdtar->fd = -1;
407
408 while (bsdtar->archive_dir->head != NULL) {
409 p = bsdtar->archive_dir->head->next;
410 free(bsdtar->archive_dir->head->name);
411 free(bsdtar->archive_dir->head);
412 bsdtar->archive_dir->head = p;
413 }
414 bsdtar->archive_dir->tail = NULL;
415 }
416
417
418 /*
419 * Write user-specified files/dirs to opened archive.
420 */
421 static void
write_archive(struct archive * a,struct bsdtar * bsdtar)422 write_archive(struct archive *a, struct bsdtar *bsdtar)
423 {
424 const char *arg;
425 struct archive_entry *entry, *sparse_entry;
426
427 /* Choose a suitable copy buffer size */
428 bsdtar->buff_size = 64 * 1024;
429 while (bsdtar->buff_size < (size_t)bsdtar->bytes_per_block)
430 bsdtar->buff_size *= 2;
431 /* Try to compensate for space we'll lose to alignment. */
432 bsdtar->buff_size += 16 * 1024;
433
434 /* Allocate a buffer for file data. */
435 if ((bsdtar->buff = malloc(bsdtar->buff_size)) == NULL)
436 lafe_errc(1, 0, "cannot allocate memory");
437
438 if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL)
439 lafe_errc(1, 0, "cannot create link resolver");
440 archive_entry_linkresolver_set_strategy(bsdtar->resolver,
441 archive_format(a));
442
443 /* Create a read_disk object. */
444 if ((bsdtar->diskreader = archive_read_disk_new()) == NULL)
445 lafe_errc(1, 0, "Cannot create read_disk object");
446 /* Tell the read_disk how handle symlink. */
447 switch (bsdtar->symlink_mode) {
448 case 'H':
449 archive_read_disk_set_symlink_hybrid(bsdtar->diskreader);
450 break;
451 case 'L':
452 archive_read_disk_set_symlink_logical(bsdtar->diskreader);
453 break;
454 default:
455 archive_read_disk_set_symlink_physical(bsdtar->diskreader);
456 break;
457 }
458 /* Register entry filters. */
459 archive_read_disk_set_matching(bsdtar->diskreader,
460 bsdtar->matching, excluded_callback, bsdtar);
461 archive_read_disk_set_metadata_filter_callback(
462 bsdtar->diskreader, metadata_filter, bsdtar);
463 /* Set the behavior of archive_read_disk. */
464 archive_read_disk_set_behavior(bsdtar->diskreader,
465 bsdtar->readdisk_flags);
466 archive_read_disk_set_standard_lookup(bsdtar->diskreader);
467
468 if (bsdtar->names_from_file != NULL)
469 archive_names_from_file(bsdtar, a);
470
471 while (*bsdtar->argv) {
472 arg = *bsdtar->argv;
473 if (arg[0] == '-' && arg[1] == 'C') {
474 arg += 2;
475 if (*arg == '\0') {
476 bsdtar->argv++;
477 arg = *bsdtar->argv;
478 if (arg == NULL) {
479 lafe_warnc(0, "%s",
480 "Missing argument for -C");
481 bsdtar->return_value = 1;
482 goto cleanup;
483 }
484 if (*arg == '\0') {
485 lafe_warnc(0,
486 "Meaningless argument for -C: ''");
487 bsdtar->return_value = 1;
488 goto cleanup;
489 }
490 }
491 set_chdir(bsdtar, arg);
492 } else {
493 if (*arg != '/')
494 do_chdir(bsdtar); /* Handle a deferred -C */
495 if (*arg == '@') {
496 if (append_archive_filename(bsdtar, a,
497 arg + 1) != 0)
498 break;
499 } else
500 write_hierarchy(bsdtar, a, arg);
501 }
502 bsdtar->argv++;
503 }
504
505 archive_read_disk_set_matching(bsdtar->diskreader, NULL, NULL, NULL);
506 archive_read_disk_set_metadata_filter_callback(
507 bsdtar->diskreader, NULL, NULL);
508 entry = NULL;
509 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
510 while (entry != NULL) {
511 int r;
512 struct archive_entry *entry2;
513 struct archive *disk = bsdtar->diskreader;
514
515 /*
516 * This tricky code here is to correctly read the contents
517 * of the entry because the disk reader bsdtar->diskreader
518 * is pointing at does not have any information about the
519 * entry by this time and using archive_read_data_block()
520 * with the disk reader consequently must fail. And we
521 * have to re-open the entry to read the contents.
522 */
523 /* TODO: Work with -C option as well. */
524 r = archive_read_disk_open(disk,
525 archive_entry_sourcepath(entry));
526 if (r != ARCHIVE_OK) {
527 lafe_warnc(archive_errno(disk),
528 "%s", archive_error_string(disk));
529 bsdtar->return_value = 1;
530 goto next_entry;
531 }
532
533 /*
534 * Invoke archive_read_next_header2() to work
535 * archive_read_data_block(), which is called via write_file(),
536 * without failure.
537 */
538 entry2 = archive_entry_new();
539 r = archive_read_next_header2(disk, entry2);
540 archive_entry_free(entry2);
541 if (r != ARCHIVE_OK) {
542 lafe_warnc(archive_errno(disk),
543 "%s", archive_error_string(disk));
544 if (r == ARCHIVE_FATAL)
545 bsdtar->return_value = 1;
546 archive_read_close(disk);
547 goto next_entry;
548 }
549
550 write_file(bsdtar, a, entry);
551 archive_read_close(disk);
552 next_entry:
553 archive_entry_free(entry);
554 entry = NULL;
555 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
556 }
557
558 if (archive_write_close(a)) {
559 lafe_warnc(0, "%s", archive_error_string(a));
560 bsdtar->return_value = 1;
561 }
562
563 cleanup:
564 /* Free file data buffer. */
565 free(bsdtar->buff);
566 archive_entry_linkresolver_free(bsdtar->resolver);
567 bsdtar->resolver = NULL;
568 archive_read_free(bsdtar->diskreader);
569 bsdtar->diskreader = NULL;
570
571 if (bsdtar->flags & OPTFLAG_TOTALS) {
572 fprintf(stderr, "Total bytes written: %s\n",
573 tar_i64toa(archive_filter_bytes(a, -1)));
574 }
575
576 archive_write_free(a);
577 }
578
579 /*
580 * Archive names specified in file.
581 *
582 * Unless --null was specified, a line containing exactly "-C" will
583 * cause the next line to be a directory to pass to chdir(). If
584 * --null is specified, then a line "-C" is just another filename.
585 */
586 static void
archive_names_from_file(struct bsdtar * bsdtar,struct archive * a)587 archive_names_from_file(struct bsdtar *bsdtar, struct archive *a)
588 {
589 struct lafe_line_reader *lr;
590 const char *line;
591
592 bsdtar->next_line_is_dir = 0;
593
594 lr = lafe_line_reader(bsdtar->names_from_file,
595 (bsdtar->flags & OPTFLAG_NULL));
596 while ((line = lafe_line_reader_next(lr)) != NULL) {
597 if (bsdtar->next_line_is_dir) {
598 if (*line != '\0')
599 set_chdir(bsdtar, line);
600 else {
601 lafe_warnc(0,
602 "Meaningless argument for -C: ''");
603 bsdtar->return_value = 1;
604 }
605 bsdtar->next_line_is_dir = 0;
606 } else if (((bsdtar->flags & OPTFLAG_NULL) == 0) &&
607 strcmp(line, "-C") == 0)
608 bsdtar->next_line_is_dir = 1;
609 else {
610 if (*line != '/')
611 do_chdir(bsdtar); /* Handle a deferred -C */
612 write_hierarchy(bsdtar, a, line);
613 }
614 }
615 lafe_line_reader_free(lr);
616 if (bsdtar->next_line_is_dir)
617 lafe_errc(1, errno,
618 "Unexpected end of filename list; "
619 "directory expected after -C");
620 }
621
622 /*
623 * Copy from specified archive to current archive. Returns non-zero
624 * for write errors (which force us to terminate the entire archiving
625 * operation). If there are errors reading the input archive, we set
626 * bsdtar->return_value but return zero, so the overall archiving
627 * operation will complete and return non-zero.
628 */
629 static int
append_archive_filename(struct bsdtar * bsdtar,struct archive * a,const char * raw_filename)630 append_archive_filename(struct bsdtar *bsdtar, struct archive *a,
631 const char *raw_filename)
632 {
633 struct archive *ina;
634 const char *filename = raw_filename;
635 int rc;
636
637 if (strcmp(filename, "-") == 0)
638 filename = NULL; /* Library uses NULL for stdio. */
639
640 ina = archive_read_new();
641 archive_read_support_format_all(ina);
642 archive_read_support_filter_all(ina);
643 set_reader_options(bsdtar, ina);
644 archive_read_set_options(ina, "mtree:checkfs");
645 if (bsdtar->passphrase != NULL)
646 rc = archive_read_add_passphrase(a, bsdtar->passphrase);
647 else
648 rc = archive_read_set_passphrase_callback(ina, bsdtar,
649 &passphrase_callback);
650 if (rc != ARCHIVE_OK)
651 lafe_errc(1, 0, "%s", archive_error_string(a));
652 if (archive_read_open_filename(ina, filename,
653 bsdtar->bytes_per_block)) {
654 lafe_warnc(0, "%s", archive_error_string(ina));
655 bsdtar->return_value = 1;
656 return (0);
657 }
658
659 rc = append_archive(bsdtar, a, ina);
660
661 if (rc != ARCHIVE_OK) {
662 lafe_warnc(0, "Error reading archive %s: %s",
663 raw_filename, archive_error_string(ina));
664 bsdtar->return_value = 1;
665 }
666 archive_read_free(ina);
667
668 return (rc);
669 }
670
671 static int
append_archive(struct bsdtar * bsdtar,struct archive * a,struct archive * ina)672 append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
673 {
674 struct archive_entry *in_entry;
675 int e;
676
677 while (ARCHIVE_OK == (e = archive_read_next_header(ina, &in_entry))) {
678 if (archive_match_excluded(bsdtar->matching, in_entry))
679 continue;
680 if(edit_pathname(bsdtar, in_entry))
681 continue;
682 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) &&
683 !yes("copy '%s'", archive_entry_pathname(in_entry)))
684 continue;
685 if (bsdtar->verbose > 1) {
686 safe_fprintf(stderr, "a ");
687 list_item_verbose(bsdtar, stderr, in_entry);
688 } else if (bsdtar->verbose > 0)
689 safe_fprintf(stderr, "a %s",
690 archive_entry_pathname(in_entry));
691 if (need_report())
692 report_write(bsdtar, a, in_entry, 0);
693
694 e = archive_write_header(a, in_entry);
695 if (e != ARCHIVE_OK) {
696 if (!bsdtar->verbose)
697 lafe_warnc(0, "%s: %s",
698 archive_entry_pathname(in_entry),
699 archive_error_string(a));
700 else
701 fprintf(stderr, ": %s", archive_error_string(a));
702 }
703 if (e == ARCHIVE_FATAL)
704 exit(1);
705
706 if (e >= ARCHIVE_WARN) {
707 if (archive_entry_size(in_entry) == 0)
708 archive_read_data_skip(ina);
709 else if (copy_file_data_block(bsdtar, a, ina, in_entry))
710 exit(1);
711 }
712
713 if (bsdtar->verbose)
714 fprintf(stderr, "\n");
715 }
716
717 return (e == ARCHIVE_EOF ? ARCHIVE_OK : e);
718 }
719
720 /* Helper function to copy file to archive. */
721 static int
copy_file_data_block(struct bsdtar * bsdtar,struct archive * a,struct archive * in_a,struct archive_entry * entry)722 copy_file_data_block(struct bsdtar *bsdtar, struct archive *a,
723 struct archive *in_a, struct archive_entry *entry)
724 {
725 size_t bytes_read;
726 ssize_t bytes_written;
727 int64_t offset, progress = 0;
728 char *null_buff = NULL;
729 const void *buff;
730 int r;
731
732 while ((r = archive_read_data_block(in_a, &buff,
733 &bytes_read, &offset)) == ARCHIVE_OK) {
734 if (need_report())
735 report_write(bsdtar, a, entry, progress);
736
737 if (offset > progress) {
738 int64_t sparse = offset - progress;
739 size_t ns;
740
741 if (null_buff == NULL) {
742 null_buff = bsdtar->buff;
743 memset(null_buff, 0, bsdtar->buff_size);
744 }
745
746 while (sparse > 0) {
747 if (sparse > (int64_t)bsdtar->buff_size)
748 ns = bsdtar->buff_size;
749 else
750 ns = (size_t)sparse;
751 bytes_written =
752 archive_write_data(a, null_buff, ns);
753 if (bytes_written < 0) {
754 /* Write failed; this is bad */
755 lafe_warnc(0, "%s",
756 archive_error_string(a));
757 return (-1);
758 }
759 if ((size_t)bytes_written < ns) {
760 /* Write was truncated; warn but
761 * continue. */
762 lafe_warnc(0,
763 "%s: Truncated write; file may "
764 "have grown while being archived.",
765 archive_entry_pathname(entry));
766 return (0);
767 }
768 progress += bytes_written;
769 sparse -= bytes_written;
770 }
771 }
772
773 bytes_written = archive_write_data(a, buff, bytes_read);
774 if (bytes_written < 0) {
775 /* Write failed; this is bad */
776 lafe_warnc(0, "%s", archive_error_string(a));
777 return (-1);
778 }
779 if ((size_t)bytes_written < bytes_read) {
780 /* Write was truncated; warn but continue. */
781 lafe_warnc(0,
782 "%s: Truncated write; file may have grown "
783 "while being archived.",
784 archive_entry_pathname(entry));
785 return (0);
786 }
787 progress += bytes_written;
788 }
789 if (r < ARCHIVE_WARN) {
790 const char *s = archive_error_string(a);
791 if (s)
792 lafe_warnc(archive_errno(a), "%s", s);
793 return (-1);
794 }
795 return (0);
796 }
797
798 static void
excluded_callback(struct archive * a,void * _data,struct archive_entry * entry)799 excluded_callback(struct archive *a, void *_data, struct archive_entry *entry)
800 {
801 struct bsdtar *bsdtar = (struct bsdtar *)_data;
802
803 if (bsdtar->flags & OPTFLAG_NO_SUBDIRS)
804 return;
805 if (!archive_read_disk_can_descend(a))
806 return;
807 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) &&
808 !yes("add '%s'", archive_entry_pathname(entry)))
809 return;
810 archive_read_disk_descend(a);
811 }
812
813 static int
metadata_filter(struct archive * a,void * _data,struct archive_entry * entry)814 metadata_filter(struct archive *a, void *_data, struct archive_entry *entry)
815 {
816 struct bsdtar *bsdtar = (struct bsdtar *)_data;
817
818 /* XXX TODO: check whether this filesystem is
819 * synthetic and/or local. Add a new
820 * --local-only option to skip non-local
821 * filesystems. Skip synthetic filesystems
822 * regardless.
823 *
824 * The results should be cached, since
825 * tree.c doesn't usually visit a directory
826 * and the directory contents together. A simple
827 * move-to-front list should perform quite well.
828 *
829 * Use archive_read_disk_current_filesystem_is_remote().
830 */
831
832 /*
833 * If the user vetoes this file/directory, skip it.
834 * We want this to be fairly late; if some other
835 * check would veto this file, we shouldn't bother
836 * the user with it.
837 */
838 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) &&
839 !yes("add '%s'", archive_entry_pathname(entry)))
840 return (0);
841
842 /* Note: if user vetoes, we won't descend. */
843 if (((bsdtar->flags & OPTFLAG_NO_SUBDIRS) == 0) &&
844 archive_read_disk_can_descend(a))
845 archive_read_disk_descend(a);
846
847 return (1);
848 }
849
850 /*
851 * Add the file or dir hierarchy named by 'path' to the archive
852 */
853 static void
write_hierarchy(struct bsdtar * bsdtar,struct archive * a,const char * path)854 write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path)
855 {
856 struct archive *disk = bsdtar->diskreader;
857 struct archive_entry *entry = NULL, *spare_entry = NULL;
858 int r;
859
860 r = archive_read_disk_open(disk, path);
861 if (r != ARCHIVE_OK) {
862 lafe_warnc(archive_errno(disk),
863 "%s", archive_error_string(disk));
864 bsdtar->return_value = 1;
865 return;
866 }
867 bsdtar->first_fs = -1;
868
869 for (;;) {
870 archive_entry_free(entry);
871 entry = archive_entry_new();
872 r = archive_read_next_header2(disk, entry);
873 if (r == ARCHIVE_EOF)
874 break;
875 else if (r != ARCHIVE_OK) {
876 lafe_warnc(archive_errno(disk),
877 "%s", archive_error_string(disk));
878 if (r == ARCHIVE_FATAL || r == ARCHIVE_FAILED) {
879 bsdtar->return_value = 1;
880 archive_entry_free(entry);
881 archive_read_close(disk);
882 return;
883 } else if (r < ARCHIVE_WARN)
884 continue;
885 }
886
887 if (bsdtar->uid >= 0) {
888 archive_entry_set_uid(entry, bsdtar->uid);
889 if (!bsdtar->uname)
890 archive_entry_set_uname(entry,
891 archive_read_disk_uname(bsdtar->diskreader,
892 bsdtar->uid));
893 }
894 if (bsdtar->gid >= 0) {
895 archive_entry_set_gid(entry, bsdtar->gid);
896 if (!bsdtar->gname)
897 archive_entry_set_gname(entry,
898 archive_read_disk_gname(bsdtar->diskreader,
899 bsdtar->gid));
900 }
901 if (bsdtar->uname)
902 archive_entry_set_uname(entry, bsdtar->uname);
903 if (bsdtar->gname)
904 archive_entry_set_gname(entry, bsdtar->gname);
905
906 /*
907 * Rewrite the pathname to be archived. If rewrite
908 * fails, skip the entry.
909 */
910 if (edit_pathname(bsdtar, entry))
911 continue;
912
913 /* Display entry as we process it. */
914 if (bsdtar->verbose > 1) {
915 safe_fprintf(stderr, "a ");
916 list_item_verbose(bsdtar, stderr, entry);
917 } else if (bsdtar->verbose > 0) {
918 /* This format is required by SUSv2. */
919 safe_fprintf(stderr, "a %s",
920 archive_entry_pathname(entry));
921 }
922
923 /* Non-regular files get archived with zero size. */
924 if (archive_entry_filetype(entry) != AE_IFREG)
925 archive_entry_set_size(entry, 0);
926
927 archive_entry_linkify(bsdtar->resolver, &entry, &spare_entry);
928
929 while (entry != NULL) {
930 write_file(bsdtar, a, entry);
931 if (entry != spare_entry) {
932 archive_entry_free(entry);
933 }
934 entry = spare_entry;
935 spare_entry = NULL;
936 }
937
938 if (bsdtar->verbose)
939 fprintf(stderr, "\n");
940 }
941 archive_entry_free(entry);
942 archive_read_close(disk);
943 }
944
945 /*
946 * Write a single file (or directory or other filesystem object) to
947 * the archive.
948 */
949 static void
write_file(struct bsdtar * bsdtar,struct archive * a,struct archive_entry * entry)950 write_file(struct bsdtar *bsdtar, struct archive *a,
951 struct archive_entry *entry)
952 {
953 write_entry(bsdtar, a, entry);
954 }
955
956 /*
957 * Write a single entry to the archive.
958 */
959 static void
write_entry(struct bsdtar * bsdtar,struct archive * a,struct archive_entry * entry)960 write_entry(struct bsdtar *bsdtar, struct archive *a,
961 struct archive_entry *entry)
962 {
963 int e;
964
965 e = archive_write_header(a, entry);
966 if (e != ARCHIVE_OK) {
967 if (bsdtar->verbose > 0) {
968 safe_fprintf(stderr, "a ");
969 list_item_verbose(bsdtar, stderr, entry);
970 lafe_warnc(0, ": %s", archive_error_string(a));
971 } else {
972 lafe_warnc(0, "%s: %s",
973 archive_entry_pathname(entry),
974 archive_error_string(a));
975 }
976 }
977
978 if (e == ARCHIVE_FATAL)
979 exit(1);
980
981 /*
982 * If we opened a file earlier, write it out now. Note that
983 * the format handler might have reset the size field to zero
984 * to inform us that the archive body won't get stored. In
985 * that case, just skip the write.
986 */
987 if (e >= ARCHIVE_WARN && archive_entry_size(entry) > 0) {
988 if (copy_file_data_block(bsdtar, a, bsdtar->diskreader, entry))
989 exit(1);
990 }
991 }
992
993 static void
report_write(struct bsdtar * bsdtar,struct archive * a,struct archive_entry * entry,int64_t progress)994 report_write(struct bsdtar *bsdtar, struct archive *a,
995 struct archive_entry *entry, int64_t progress)
996 {
997 uint64_t comp, uncomp;
998 int compression;
999
1000 if (bsdtar->verbose)
1001 fprintf(stderr, "\n");
1002 comp = archive_filter_bytes(a, -1);
1003 uncomp = archive_filter_bytes(a, 0);
1004 fprintf(stderr, "In: %d files, %s bytes;",
1005 archive_file_count(a), tar_i64toa(uncomp));
1006 if (comp >= uncomp)
1007 compression = 0;
1008 else
1009 compression = (int)((uncomp - comp) * 100 / uncomp);
1010 fprintf(stderr,
1011 " Out: %s bytes, compression %d%%\n",
1012 tar_i64toa(comp), compression);
1013 /* Can't have two calls to tar_i64toa() pending, so split the output. */
1014 safe_fprintf(stderr, "Current: %s (%s",
1015 archive_entry_pathname(entry),
1016 tar_i64toa(progress));
1017 fprintf(stderr, "/%s bytes)\n",
1018 tar_i64toa(archive_entry_size(entry)));
1019 }
1020
1021 static void
test_for_append(struct bsdtar * bsdtar)1022 test_for_append(struct bsdtar *bsdtar)
1023 {
1024 struct stat s;
1025
1026 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL)
1027 lafe_errc(1, 0, "no files or directories specified");
1028 if (bsdtar->filename == NULL)
1029 lafe_errc(1, 0, "Cannot append to stdout.");
1030
1031 if (stat(bsdtar->filename, &s) != 0)
1032 return;
1033
1034 if (!S_ISREG(s.st_mode) && !S_ISBLK(s.st_mode))
1035 lafe_errc(1, 0,
1036 "Cannot append to %s: not a regular file.",
1037 bsdtar->filename);
1038
1039 /* Is this an appropriate check here on Windows? */
1040 /*
1041 if (GetFileType(handle) != FILE_TYPE_DISK)
1042 lafe_errc(1, 0, "Cannot append");
1043 */
1044
1045 }
1046