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 "lafe_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
115 static int
_open_wrap_sopen(char const * const path,int const oflag,...)116 _open_wrap_sopen(char const *const path, int const oflag, ...)
117 {
118 va_list ap;
119 int r, pmode;
120
121 pmode = 0;
122 if (oflag & _O_CREAT)
123 {
124 va_start(ap, oflag);
125 pmode = va_arg(ap, int);
126 va_end(ap);
127 }
128
129 _sopen_s(&r, path, oflag, _SH_DENYNO, pmode & 0600);
130 if (r < 0)
131 {
132 /* _sopen_s populates errno */
133 return -1;
134 }
135
136 return r;
137 }
138
139 #define open _open_wrap_sopen
140 #define close _close
141 #define read _read
142 #ifdef lseek
143 #undef lseek
144 #endif
145 #define lseek seek_file
146 #endif
147
148 static void
set_writer_options(struct bsdtar * bsdtar,struct archive * a)149 set_writer_options(struct bsdtar *bsdtar, struct archive *a)
150 {
151 const char *writer_options;
152 int r;
153
154 writer_options = getenv(ENV_WRITER_OPTIONS);
155 if (writer_options != NULL) {
156 size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1;
157 size_t opt_len = strlen(writer_options) + 1;
158 char *p;
159 /* Set default write options. */
160 if ((p = malloc(module_len + opt_len)) == NULL)
161 lafe_errc(1, errno, "Out of memory");
162 /* Prepend magic code to ignore options for
163 * a format or filters which are not added to
164 * the archive write object. */
165 memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len);
166 memcpy(p + module_len, writer_options, opt_len);
167 r = archive_write_set_options(a, p);
168 free(p);
169 if (r < ARCHIVE_WARN)
170 lafe_errc(1, 0, "%s", archive_error_string(a));
171 else
172 archive_clear_error(a);
173 }
174 if (ARCHIVE_OK != archive_write_set_options(a, bsdtar->option_options))
175 lafe_errc(1, 0, "%s", archive_error_string(a));
176 }
177
178 static void
set_reader_options(struct bsdtar * bsdtar,struct archive * a)179 set_reader_options(struct bsdtar *bsdtar, struct archive *a)
180 {
181 const char *reader_options;
182 int r;
183
184 (void)bsdtar; /* UNUSED */
185
186 reader_options = getenv(ENV_READER_OPTIONS);
187 if (reader_options != NULL) {
188 size_t module_len = sizeof(IGNORE_WRONG_MODULE_NAME) - 1;
189 size_t opt_len = strlen(reader_options) + 1;
190 char *p;
191 /* Set default write options. */
192 if ((p = malloc(module_len + opt_len)) == NULL)
193 lafe_errc(1, errno, "Out of memory");
194 /* Prepend magic code to ignore options for
195 * a format or filters which are not added to
196 * the archive write object. */
197 memcpy(p, IGNORE_WRONG_MODULE_NAME, module_len);
198 memcpy(p + module_len, reader_options, opt_len);
199 r = archive_read_set_options(a, p);
200 free(p);
201 if (r < ARCHIVE_WARN)
202 lafe_errc(1, 0, "%s", archive_error_string(a));
203 else
204 archive_clear_error(a);
205 }
206 if (bsdtar->flags & OPTFLAG_IGNORE_ZEROS)
207 if (archive_read_set_options(a,
208 "read_concatenated_archives") != ARCHIVE_OK)
209 lafe_errc(1, 0, "%s", archive_error_string(a));
210 }
211
212 void
tar_mode_c(struct bsdtar * bsdtar)213 tar_mode_c(struct bsdtar *bsdtar)
214 {
215 struct archive *a;
216 const void *filter_name;
217 int r;
218
219 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL)
220 lafe_errc(1, 0, "no files or directories specified");
221
222 a = archive_write_new();
223
224 /* Support any format that the library supports. */
225 if (cset_get_format(bsdtar->cset) == NULL) {
226 r = archive_write_set_format_pax_restricted(a);
227 cset_set_format(bsdtar->cset, "pax restricted");
228 } else {
229 r = archive_write_set_format_by_name(a,
230 cset_get_format(bsdtar->cset));
231 }
232 if (r != ARCHIVE_OK) {
233 fprintf(stderr, "Can't use format %s: %s\n",
234 cset_get_format(bsdtar->cset),
235 archive_error_string(a));
236 usage();
237 }
238
239 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block);
240 archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block);
241
242 r = cset_write_add_filters(bsdtar->cset, a, &filter_name);
243 if (r < ARCHIVE_WARN) {
244 lafe_errc(1, 0, "Unsupported compression option --%s",
245 (const char *)filter_name);
246 }
247
248 set_writer_options(bsdtar, a);
249 if (bsdtar->passphrase != NULL)
250 r = archive_write_set_passphrase(a, bsdtar->passphrase);
251 else
252 r = archive_write_set_passphrase_callback(a, bsdtar,
253 &passphrase_callback);
254 if (r != ARCHIVE_OK)
255 lafe_errc(1, 0, "%s", archive_error_string(a));
256 if (ARCHIVE_OK != archive_write_open_filename(a, bsdtar->filename))
257 lafe_errc(1, 0, "%s", archive_error_string(a));
258 write_archive(a, bsdtar);
259 }
260
261 /*
262 * Same as 'c', except we only support tar or empty formats in
263 * uncompressed files on disk.
264 */
265 void
tar_mode_r(struct bsdtar * bsdtar)266 tar_mode_r(struct bsdtar *bsdtar)
267 {
268 int64_t end_offset;
269 int format;
270 struct archive *a;
271 struct archive_entry *entry;
272 int r;
273
274 /* Sanity-test some arguments and the file. */
275 test_for_append(bsdtar);
276
277 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
278
279 #if defined(__BORLANDC__)
280 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY);
281 #else
282 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_CREAT | O_BINARY, 0666);
283 #endif
284 if (bsdtar->fd < 0)
285 lafe_errc(1, errno,
286 "Cannot open %s", bsdtar->filename);
287
288 a = archive_read_new();
289 archive_read_support_filter_all(a);
290 archive_read_support_format_empty(a);
291 archive_read_support_format_tar(a);
292 archive_read_support_format_gnutar(a);
293 set_reader_options(bsdtar, a);
294 r = archive_read_open_fd(a, bsdtar->fd, 10240);
295 if (r != ARCHIVE_OK)
296 lafe_errc(1, archive_errno(a),
297 "Can't read archive %s: %s", bsdtar->filename,
298 archive_error_string(a));
299 while (0 == archive_read_next_header(a, &entry)) {
300 if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) {
301 archive_read_free(a);
302 close(bsdtar->fd);
303 lafe_errc(1, 0,
304 "Cannot append to compressed archive.");
305 }
306 /* Keep going until we hit end-of-archive */
307 format = archive_format(a);
308 }
309
310 end_offset = archive_read_header_position(a);
311 archive_read_free(a);
312
313 /* Re-open archive for writing */
314 a = archive_write_new();
315 /*
316 * Set the format to be used for writing. To allow people to
317 * extend empty files, we need to allow them to specify the format,
318 * which opens the possibility that they will specify a format that
319 * doesn't match the existing format. Hence, the following bit
320 * of arcane ugliness.
321 */
322
323 if (cset_get_format(bsdtar->cset) != NULL) {
324 /* If the user requested a format, use that, but ... */
325 archive_write_set_format_by_name(a,
326 cset_get_format(bsdtar->cset));
327 /* ... complain if it's not compatible. */
328 format &= ARCHIVE_FORMAT_BASE_MASK;
329 if (format != (int)(archive_format(a) & ARCHIVE_FORMAT_BASE_MASK)
330 && format != ARCHIVE_FORMAT_EMPTY) {
331 lafe_errc(1, 0,
332 "Format %s is incompatible with the archive %s.",
333 cset_get_format(bsdtar->cset), bsdtar->filename);
334 }
335 } else {
336 /*
337 * Just preserve the current format, with a little care
338 * for formats that libarchive can't write.
339 */
340 if (format == ARCHIVE_FORMAT_EMPTY)
341 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
342 archive_write_set_format(a, format);
343 }
344 if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0)
345 lafe_errc(1, errno, "Could not seek to archive end");
346 set_writer_options(bsdtar, a);
347 if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd))
348 lafe_errc(1, 0, "%s", archive_error_string(a));
349
350 write_archive(a, bsdtar); /* XXX check return val XXX */
351
352 close(bsdtar->fd);
353 bsdtar->fd = -1;
354 }
355
356 void
tar_mode_u(struct bsdtar * bsdtar)357 tar_mode_u(struct bsdtar *bsdtar)
358 {
359 int64_t end_offset;
360 struct archive *a;
361 struct archive_entry *entry;
362 int format;
363 struct archive_dir_entry *p;
364 struct archive_dir archive_dir;
365
366 bsdtar->archive_dir = &archive_dir;
367 memset(&archive_dir, 0, sizeof(archive_dir));
368
369 format = ARCHIVE_FORMAT_TAR_PAX_RESTRICTED;
370
371 /* Sanity-test some arguments and the file. */
372 test_for_append(bsdtar);
373
374 bsdtar->fd = open(bsdtar->filename, O_RDWR | O_BINARY);
375 if (bsdtar->fd < 0)
376 lafe_errc(1, errno,
377 "Cannot open %s", bsdtar->filename);
378
379 a = archive_read_new();
380 archive_read_support_filter_all(a);
381 archive_read_support_format_tar(a);
382 archive_read_support_format_gnutar(a);
383 set_reader_options(bsdtar, a);
384 if (archive_read_open_fd(a, bsdtar->fd, bsdtar->bytes_per_block)
385 != ARCHIVE_OK) {
386 lafe_errc(1, 0,
387 "Can't open %s: %s", bsdtar->filename,
388 archive_error_string(a));
389 }
390
391 /* Build a list of all entries and their recorded mod times. */
392 while (0 == archive_read_next_header(a, &entry)) {
393 if (archive_filter_code(a, 0) != ARCHIVE_FILTER_NONE) {
394 archive_read_free(a);
395 close(bsdtar->fd);
396 lafe_errc(1, 0,
397 "Cannot append to compressed archive.");
398 }
399 if (archive_match_exclude_entry(bsdtar->matching,
400 ARCHIVE_MATCH_MTIME | ARCHIVE_MATCH_OLDER |
401 ARCHIVE_MATCH_EQUAL, entry) != ARCHIVE_OK)
402 lafe_errc(1, 0, "Error : %s",
403 archive_error_string(bsdtar->matching));
404 /* Record the last format determination we see */
405 format = archive_format(a);
406 /* Keep going until we hit end-of-archive */
407 }
408
409 end_offset = archive_read_header_position(a);
410 archive_read_free(a);
411
412 /* Re-open archive for writing. */
413 a = archive_write_new();
414 /*
415 * Set format to same one auto-detected above.
416 */
417 archive_write_set_format(a, format);
418 archive_write_set_bytes_per_block(a, bsdtar->bytes_per_block);
419 archive_write_set_bytes_in_last_block(a, bsdtar->bytes_in_last_block);
420
421 if (lseek(bsdtar->fd, end_offset, SEEK_SET) < 0)
422 lafe_errc(1, errno, "Could not seek to archive end");
423 set_writer_options(bsdtar, a);
424 if (ARCHIVE_OK != archive_write_open_fd(a, bsdtar->fd))
425 lafe_errc(1, 0, "%s", archive_error_string(a));
426
427 write_archive(a, bsdtar);
428
429 close(bsdtar->fd);
430 bsdtar->fd = -1;
431
432 while (bsdtar->archive_dir->head != NULL) {
433 p = bsdtar->archive_dir->head->next;
434 free(bsdtar->archive_dir->head->name);
435 free(bsdtar->archive_dir->head);
436 bsdtar->archive_dir->head = p;
437 }
438 bsdtar->archive_dir->tail = NULL;
439 }
440
441
442 /*
443 * Write user-specified files/dirs to opened archive.
444 */
445 static void
write_archive(struct archive * a,struct bsdtar * bsdtar)446 write_archive(struct archive *a, struct bsdtar *bsdtar)
447 {
448 const char *arg;
449 struct archive_entry *entry, *sparse_entry;
450
451 /* Choose a suitable copy buffer size */
452 bsdtar->buff_size = 64 * 1024;
453 while (bsdtar->buff_size < (size_t)bsdtar->bytes_per_block)
454 bsdtar->buff_size *= 2;
455 /* Try to compensate for space we'll lose to alignment. */
456 bsdtar->buff_size += 16 * 1024;
457
458 /* Allocate a buffer for file data. */
459 if ((bsdtar->buff = malloc(bsdtar->buff_size)) == NULL)
460 lafe_errc(1, 0, "cannot allocate memory");
461
462 if ((bsdtar->resolver = archive_entry_linkresolver_new()) == NULL)
463 lafe_errc(1, 0, "cannot create link resolver");
464 archive_entry_linkresolver_set_strategy(bsdtar->resolver,
465 archive_format(a));
466
467 /* Create a read_disk object. */
468 if ((bsdtar->diskreader = archive_read_disk_new()) == NULL)
469 lafe_errc(1, 0, "Cannot create read_disk object");
470 /* Tell the read_disk how handle symlink. */
471 switch (bsdtar->symlink_mode) {
472 case 'H':
473 archive_read_disk_set_symlink_hybrid(bsdtar->diskreader);
474 break;
475 case 'L':
476 archive_read_disk_set_symlink_logical(bsdtar->diskreader);
477 break;
478 default:
479 archive_read_disk_set_symlink_physical(bsdtar->diskreader);
480 break;
481 }
482 /* Register entry filters. */
483 archive_read_disk_set_matching(bsdtar->diskreader,
484 bsdtar->matching, excluded_callback, bsdtar);
485 archive_read_disk_set_metadata_filter_callback(
486 bsdtar->diskreader, metadata_filter, bsdtar);
487 /* Set the behavior of archive_read_disk. */
488 archive_read_disk_set_behavior(bsdtar->diskreader,
489 bsdtar->readdisk_flags);
490 archive_read_disk_set_standard_lookup(bsdtar->diskreader);
491
492 if (bsdtar->names_from_file != NULL)
493 archive_names_from_file(bsdtar, a);
494
495 while (*bsdtar->argv) {
496 arg = *bsdtar->argv;
497 if (arg[0] == '-' && arg[1] == 'C') {
498 arg += 2;
499 if (*arg == '\0') {
500 bsdtar->argv++;
501 arg = *bsdtar->argv;
502 if (arg == NULL) {
503 lafe_warnc(0, "%s",
504 "Missing argument for -C");
505 bsdtar->return_value = 1;
506 goto cleanup;
507 }
508 if (*arg == '\0') {
509 lafe_warnc(0,
510 "Meaningless argument for -C: ''");
511 bsdtar->return_value = 1;
512 goto cleanup;
513 }
514 }
515 set_chdir(bsdtar, arg);
516 } else {
517 if (*arg != '/')
518 do_chdir(bsdtar); /* Handle a deferred -C */
519 if (*arg == '@') {
520 if (append_archive_filename(bsdtar, a,
521 arg + 1) != 0)
522 break;
523 } else
524 write_hierarchy(bsdtar, a, arg);
525 }
526 bsdtar->argv++;
527 }
528
529 archive_read_disk_set_matching(bsdtar->diskreader, NULL, NULL, NULL);
530 archive_read_disk_set_metadata_filter_callback(
531 bsdtar->diskreader, NULL, NULL);
532 entry = NULL;
533 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
534 while (entry != NULL) {
535 int r;
536 struct archive_entry *entry2;
537 struct archive *disk = bsdtar->diskreader;
538
539 /*
540 * This tricky code here is to correctly read the contents
541 * of the entry because the disk reader bsdtar->diskreader
542 * is pointing at does not have any information about the
543 * entry by this time and using archive_read_data_block()
544 * with the disk reader consequently must fail. And we
545 * have to re-open the entry to read the contents.
546 */
547 /* TODO: Work with -C option as well. */
548 r = archive_read_disk_open(disk,
549 archive_entry_sourcepath(entry));
550 if (r != ARCHIVE_OK) {
551 lafe_warnc(archive_errno(disk),
552 "%s", archive_error_string(disk));
553 bsdtar->return_value = 1;
554 goto next_entry;
555 }
556
557 /*
558 * Invoke archive_read_next_header2() to work
559 * archive_read_data_block(), which is called via write_file(),
560 * without failure.
561 */
562 entry2 = archive_entry_new();
563 r = archive_read_next_header2(disk, entry2);
564 archive_entry_free(entry2);
565 if (r != ARCHIVE_OK) {
566 lafe_warnc(archive_errno(disk),
567 "%s", archive_error_string(disk));
568 if (r == ARCHIVE_FATAL)
569 bsdtar->return_value = 1;
570 archive_read_close(disk);
571 goto next_entry;
572 }
573
574 write_file(bsdtar, a, entry);
575 archive_read_close(disk);
576 next_entry:
577 archive_entry_free(entry);
578 entry = NULL;
579 archive_entry_linkify(bsdtar->resolver, &entry, &sparse_entry);
580 }
581
582 if (archive_write_close(a)) {
583 lafe_warnc(0, "%s", archive_error_string(a));
584 bsdtar->return_value = 1;
585 }
586
587 cleanup:
588 /* Free file data buffer. */
589 free(bsdtar->buff);
590 archive_entry_linkresolver_free(bsdtar->resolver);
591 bsdtar->resolver = NULL;
592 archive_read_free(bsdtar->diskreader);
593 bsdtar->diskreader = NULL;
594
595 if (bsdtar->flags & OPTFLAG_TOTALS) {
596 fprintf(stderr, "Total bytes written: %s\n",
597 tar_i64toa(archive_filter_bytes(a, -1)));
598 }
599
600 archive_write_free(a);
601 }
602
603 /*
604 * Archive names specified in file.
605 *
606 * Unless --null was specified, a line containing exactly "-C" will
607 * cause the next line to be a directory to pass to chdir(). If
608 * --null is specified, then a line "-C" is just another filename.
609 */
610 static void
archive_names_from_file(struct bsdtar * bsdtar,struct archive * a)611 archive_names_from_file(struct bsdtar *bsdtar, struct archive *a)
612 {
613 struct lafe_line_reader *lr;
614 const char *line;
615
616 bsdtar->next_line_is_dir = 0;
617
618 lr = lafe_line_reader(bsdtar->names_from_file,
619 (bsdtar->flags & OPTFLAG_NULL));
620 while ((line = lafe_line_reader_next(lr)) != NULL) {
621 if (bsdtar->next_line_is_dir) {
622 if (*line != '\0')
623 set_chdir(bsdtar, line);
624 else {
625 lafe_warnc(0,
626 "Meaningless argument for -C: ''");
627 bsdtar->return_value = 1;
628 }
629 bsdtar->next_line_is_dir = 0;
630 } else if (((bsdtar->flags & OPTFLAG_NULL) == 0) &&
631 strcmp(line, "-C") == 0)
632 bsdtar->next_line_is_dir = 1;
633 else {
634 if (*line != '/')
635 do_chdir(bsdtar); /* Handle a deferred -C */
636 write_hierarchy(bsdtar, a, line);
637 }
638 }
639 lafe_line_reader_free(lr);
640 if (bsdtar->next_line_is_dir)
641 lafe_errc(1, errno,
642 "Unexpected end of filename list; "
643 "directory expected after -C");
644 }
645
646 /*
647 * Copy from specified archive to current archive. Returns non-zero
648 * for write errors (which force us to terminate the entire archiving
649 * operation). If there are errors reading the input archive, we set
650 * bsdtar->return_value but return zero, so the overall archiving
651 * operation will complete and return non-zero.
652 */
653 static int
append_archive_filename(struct bsdtar * bsdtar,struct archive * a,const char * raw_filename)654 append_archive_filename(struct bsdtar *bsdtar, struct archive *a,
655 const char *raw_filename)
656 {
657 struct archive *ina;
658 const char *filename = raw_filename;
659 int rc;
660
661 if (strcmp(filename, "-") == 0)
662 filename = NULL; /* Library uses NULL for stdio. */
663
664 ina = archive_read_new();
665 archive_read_support_format_all(ina);
666 archive_read_support_filter_all(ina);
667 set_reader_options(bsdtar, ina);
668 archive_read_set_options(ina, "mtree:checkfs");
669 if (bsdtar->passphrase != NULL)
670 rc = archive_read_add_passphrase(a, bsdtar->passphrase);
671 else
672 rc = archive_read_set_passphrase_callback(ina, bsdtar,
673 &passphrase_callback);
674 if (rc != ARCHIVE_OK)
675 lafe_errc(1, 0, "%s", archive_error_string(a));
676 if (archive_read_open_filename(ina, filename,
677 bsdtar->bytes_per_block)) {
678 lafe_warnc(0, "%s", archive_error_string(ina));
679 bsdtar->return_value = 1;
680 return (0);
681 }
682
683 rc = append_archive(bsdtar, a, ina);
684
685 if (rc != ARCHIVE_OK) {
686 lafe_warnc(0, "Error reading archive %s: %s",
687 raw_filename, archive_error_string(ina));
688 bsdtar->return_value = 1;
689 }
690 archive_read_free(ina);
691
692 return (rc);
693 }
694
695 static int
append_archive(struct bsdtar * bsdtar,struct archive * a,struct archive * ina)696 append_archive(struct bsdtar *bsdtar, struct archive *a, struct archive *ina)
697 {
698 struct archive_entry *in_entry;
699 int e;
700
701 while (ARCHIVE_OK == (e = archive_read_next_header(ina, &in_entry))) {
702 if (archive_match_excluded(bsdtar->matching, in_entry))
703 continue;
704 if(edit_pathname(bsdtar, in_entry))
705 continue;
706 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) &&
707 !yes("copy '%s'", archive_entry_pathname(in_entry)))
708 continue;
709 edit_mtime(bsdtar, in_entry);
710 if (bsdtar->verbose > 1) {
711 safe_fprintf(stderr, "a ");
712 list_item_verbose(bsdtar, stderr, in_entry);
713 } else if (bsdtar->verbose > 0)
714 safe_fprintf(stderr, "a %s",
715 archive_entry_pathname(in_entry));
716 if (need_report())
717 report_write(bsdtar, a, in_entry, 0);
718
719 e = archive_write_header(a, in_entry);
720 if (e != ARCHIVE_OK) {
721 if (!bsdtar->verbose)
722 lafe_warnc(0, "%s: %s",
723 archive_entry_pathname(in_entry),
724 archive_error_string(a));
725 else
726 fprintf(stderr, ": %s", archive_error_string(a));
727 }
728 if (e == ARCHIVE_FATAL)
729 exit(1);
730
731 if (e >= ARCHIVE_WARN) {
732 if (archive_entry_size(in_entry) == 0)
733 archive_read_data_skip(ina);
734 else if (copy_file_data_block(bsdtar, a, ina, in_entry))
735 exit(1);
736 }
737
738 if (bsdtar->verbose)
739 fprintf(stderr, "\n");
740 }
741
742 return (e == ARCHIVE_EOF ? ARCHIVE_OK : e);
743 }
744
745 /* Helper function to copy file to archive. */
746 static int
copy_file_data_block(struct bsdtar * bsdtar,struct archive * a,struct archive * in_a,struct archive_entry * entry)747 copy_file_data_block(struct bsdtar *bsdtar, struct archive *a,
748 struct archive *in_a, struct archive_entry *entry)
749 {
750 size_t bytes_read;
751 ssize_t bytes_written;
752 int64_t offset, progress = 0;
753 char *null_buff = NULL;
754 const void *buff;
755 int r;
756
757 while ((r = archive_read_data_block(in_a, &buff,
758 &bytes_read, &offset)) == ARCHIVE_OK) {
759 if (need_report())
760 report_write(bsdtar, a, entry, progress);
761
762 if (offset > progress) {
763 int64_t sparse = offset - progress;
764 size_t ns;
765
766 if (null_buff == NULL) {
767 null_buff = bsdtar->buff;
768 memset(null_buff, 0, bsdtar->buff_size);
769 }
770
771 while (sparse > 0) {
772 if (sparse > (int64_t)bsdtar->buff_size)
773 ns = bsdtar->buff_size;
774 else
775 ns = (size_t)sparse;
776 bytes_written =
777 archive_write_data(a, null_buff, ns);
778 if (bytes_written < 0) {
779 /* Write failed; this is bad */
780 lafe_warnc(0, "%s",
781 archive_error_string(a));
782 return (-1);
783 }
784 if ((size_t)bytes_written < ns) {
785 /* Write was truncated; warn but
786 * continue. */
787 lafe_warnc(0,
788 "%s: Truncated write; file may "
789 "have grown while being archived.",
790 archive_entry_pathname(entry));
791 return (0);
792 }
793 progress += bytes_written;
794 sparse -= bytes_written;
795 }
796 }
797
798 bytes_written = archive_write_data(a, buff, bytes_read);
799 if (bytes_written < 0) {
800 /* Write failed; this is bad */
801 lafe_warnc(0, "%s", archive_error_string(a));
802 return (-1);
803 }
804 if ((size_t)bytes_written < bytes_read) {
805 /* Write was truncated; warn but continue. */
806 lafe_warnc(0,
807 "%s: Truncated write; file may have grown "
808 "while being archived.",
809 archive_entry_pathname(entry));
810 return (0);
811 }
812 progress += bytes_written;
813 }
814 if (r < ARCHIVE_WARN) {
815 lafe_warnc(archive_errno(a), "%s", archive_error_string(a));
816 return (-1);
817 }
818 return (0);
819 }
820
821 static void
excluded_callback(struct archive * a,void * _data,struct archive_entry * entry)822 excluded_callback(struct archive *a, void *_data, struct archive_entry *entry)
823 {
824 struct bsdtar *bsdtar = (struct bsdtar *)_data;
825
826 if (bsdtar->flags & OPTFLAG_NO_SUBDIRS)
827 return;
828 if (!archive_read_disk_can_descend(a))
829 return;
830 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) &&
831 !yes("add '%s'", archive_entry_pathname(entry)))
832 return;
833 archive_read_disk_descend(a);
834 }
835
836 static int
metadata_filter(struct archive * a,void * _data,struct archive_entry * entry)837 metadata_filter(struct archive *a, void *_data, struct archive_entry *entry)
838 {
839 struct bsdtar *bsdtar = (struct bsdtar *)_data;
840
841 /* XXX TODO: check whether this filesystem is
842 * synthetic and/or local. Add a new
843 * --local-only option to skip non-local
844 * filesystems. Skip synthetic filesystems
845 * regardless.
846 *
847 * The results should be cached, since
848 * tree.c doesn't usually visit a directory
849 * and the directory contents together. A simple
850 * move-to-front list should perform quite well.
851 *
852 * Use archive_read_disk_current_filesystem_is_remote().
853 */
854
855 /*
856 * If the user vetoes this file/directory, skip it.
857 * We want this to be fairly late; if some other
858 * check would veto this file, we shouldn't bother
859 * the user with it.
860 */
861 if ((bsdtar->flags & OPTFLAG_INTERACTIVE) &&
862 !yes("add '%s'", archive_entry_pathname(entry)))
863 return (0);
864
865 /* Note: if user vetoes, we won't descend. */
866 if (((bsdtar->flags & OPTFLAG_NO_SUBDIRS) == 0) &&
867 archive_read_disk_can_descend(a))
868 archive_read_disk_descend(a);
869
870 return (1);
871 }
872
873 /*
874 * Add the file or dir hierarchy named by 'path' to the archive
875 */
876 static void
write_hierarchy(struct bsdtar * bsdtar,struct archive * a,const char * path)877 write_hierarchy(struct bsdtar *bsdtar, struct archive *a, const char *path)
878 {
879 struct archive *disk = bsdtar->diskreader;
880 struct archive_entry *entry = NULL, *spare_entry = NULL;
881 int r;
882
883 r = archive_read_disk_open(disk, path);
884 if (r != ARCHIVE_OK) {
885 lafe_warnc(archive_errno(disk),
886 "%s", archive_error_string(disk));
887 bsdtar->return_value = 1;
888 return;
889 }
890 bsdtar->first_fs = -1;
891
892 for (;;) {
893 archive_entry_free(entry);
894 entry = archive_entry_new();
895 r = archive_read_next_header2(disk, entry);
896 if (r == ARCHIVE_EOF)
897 break;
898 else if (r != ARCHIVE_OK) {
899 lafe_warnc(archive_errno(disk),
900 "%s", archive_error_string(disk));
901 if (r == ARCHIVE_FATAL || r == ARCHIVE_FAILED) {
902 bsdtar->return_value = 1;
903 archive_entry_free(entry);
904 archive_read_close(disk);
905 return;
906 } else if (r < ARCHIVE_WARN)
907 continue;
908 }
909
910 if (bsdtar->uid >= 0) {
911 archive_entry_set_uid(entry, bsdtar->uid);
912 if (!bsdtar->uname)
913 archive_entry_set_uname(entry,
914 archive_read_disk_uname(bsdtar->diskreader,
915 bsdtar->uid));
916 }
917 if (bsdtar->gid >= 0) {
918 archive_entry_set_gid(entry, bsdtar->gid);
919 if (!bsdtar->gname)
920 archive_entry_set_gname(entry,
921 archive_read_disk_gname(bsdtar->diskreader,
922 bsdtar->gid));
923 }
924 if (bsdtar->uname)
925 archive_entry_set_uname(entry, bsdtar->uname);
926 if (bsdtar->gname)
927 archive_entry_set_gname(entry, bsdtar->gname);
928
929 /*
930 * Rewrite the pathname to be archived. If rewrite
931 * fails, skip the entry.
932 */
933 if (edit_pathname(bsdtar, entry))
934 continue;
935
936 /* Rewrite the mtime. */
937 edit_mtime(bsdtar, entry);
938
939 /* Display entry as we process it. */
940 if (bsdtar->verbose > 1) {
941 safe_fprintf(stderr, "a ");
942 list_item_verbose(bsdtar, stderr, entry);
943 } else if (bsdtar->verbose > 0) {
944 /* This format is required by SUSv2. */
945 safe_fprintf(stderr, "a %s",
946 archive_entry_pathname(entry));
947 }
948
949 /* Non-regular files get archived with zero size. */
950 if (archive_entry_filetype(entry) != AE_IFREG)
951 archive_entry_set_size(entry, 0);
952
953 archive_entry_linkify(bsdtar->resolver, &entry, &spare_entry);
954
955 while (entry != NULL) {
956 write_file(bsdtar, a, entry);
957 if (entry != spare_entry) {
958 archive_entry_free(entry);
959 }
960 entry = spare_entry;
961 spare_entry = NULL;
962 }
963
964 if (bsdtar->verbose)
965 fprintf(stderr, "\n");
966 }
967 archive_entry_free(entry);
968 archive_read_close(disk);
969 }
970
971 /*
972 * Write a single file (or directory or other filesystem object) to
973 * the archive.
974 */
975 static void
write_file(struct bsdtar * bsdtar,struct archive * a,struct archive_entry * entry)976 write_file(struct bsdtar *bsdtar, struct archive *a,
977 struct archive_entry *entry)
978 {
979 write_entry(bsdtar, a, entry);
980 }
981
982 /*
983 * Write a single entry to the archive.
984 */
985 static void
write_entry(struct bsdtar * bsdtar,struct archive * a,struct archive_entry * entry)986 write_entry(struct bsdtar *bsdtar, struct archive *a,
987 struct archive_entry *entry)
988 {
989 int e;
990
991 e = archive_write_header(a, entry);
992 if (e != ARCHIVE_OK) {
993 if (bsdtar->verbose > 1) {
994 safe_fprintf(stderr, "a ");
995 list_item_verbose(bsdtar, stderr, entry);
996 lafe_warnc(0, ": %s", archive_error_string(a));
997 } else {
998 lafe_warnc(0, "%s: %s",
999 archive_entry_pathname(entry),
1000 archive_error_string(a));
1001 }
1002 }
1003
1004 if (e == ARCHIVE_FATAL)
1005 exit(1);
1006
1007 /*
1008 * If we opened a file earlier, write it out now. Note that
1009 * the format handler might have reset the size field to zero
1010 * to inform us that the archive body won't get stored. In
1011 * that case, just skip the write.
1012 */
1013 if (e >= ARCHIVE_WARN && archive_entry_size(entry) > 0) {
1014 if (copy_file_data_block(bsdtar, a, bsdtar->diskreader, entry))
1015 exit(1);
1016 }
1017 }
1018
1019 static void
report_write(struct bsdtar * bsdtar,struct archive * a,struct archive_entry * entry,int64_t progress)1020 report_write(struct bsdtar *bsdtar, struct archive *a,
1021 struct archive_entry *entry, int64_t progress)
1022 {
1023 uint64_t comp, uncomp;
1024 int compression;
1025
1026 if (bsdtar->verbose)
1027 fprintf(stderr, "\n");
1028 comp = archive_filter_bytes(a, -1);
1029 uncomp = archive_filter_bytes(a, 0);
1030 fprintf(stderr, "In: %d files, %s bytes;",
1031 archive_file_count(a), tar_i64toa(uncomp));
1032 if (comp >= uncomp)
1033 compression = 0;
1034 else
1035 compression = (int)((uncomp - comp) * 100 / uncomp);
1036 fprintf(stderr,
1037 " Out: %s bytes, compression %d%%\n",
1038 tar_i64toa(comp), compression);
1039 /* Can't have two calls to tar_i64toa() pending, so split the output. */
1040 safe_fprintf(stderr, "Current: %s (%s",
1041 archive_entry_pathname(entry),
1042 tar_i64toa(progress));
1043 fprintf(stderr, "/%s bytes)\n",
1044 tar_i64toa(archive_entry_size(entry)));
1045 }
1046
1047 static void
test_for_append(struct bsdtar * bsdtar)1048 test_for_append(struct bsdtar *bsdtar)
1049 {
1050 struct stat s;
1051
1052 if (*bsdtar->argv == NULL && bsdtar->names_from_file == NULL)
1053 lafe_errc(1, 0, "no files or directories specified");
1054 if (bsdtar->filename == NULL)
1055 lafe_errc(1, 0, "Cannot append to stdout.");
1056
1057 if (stat(bsdtar->filename, &s) != 0)
1058 return;
1059
1060 if (!S_ISREG(s.st_mode) && !S_ISBLK(s.st_mode))
1061 lafe_errc(1, 0,
1062 "Cannot append to %s: not a regular file.",
1063 bsdtar->filename);
1064
1065 /* Is this an appropriate check here on Windows? */
1066 /*
1067 if (GetFileType(handle) != FILE_TYPE_DISK)
1068 lafe_errc(1, 0, "Cannot append");
1069 */
1070
1071 }
1072