1 /*-
2 * Copyright (c) 2003-2009 Tim Kientzle
3 * Copyright (c) 2010-2012 Michihiro NAKAJIMA
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "archive_platform.h"
28 __FBSDID("$FreeBSD$");
29
30 /* This is the tree-walking code for POSIX systems. */
31 #if !defined(_WIN32) || defined(__CYGWIN__)
32
33 #ifdef HAVE_SYS_TYPES_H
34 /* Mac OSX requires sys/types.h before sys/acl.h. */
35 #include <sys/types.h>
36 #endif
37 #ifdef HAVE_SYS_ACL_H
38 #include <sys/acl.h>
39 #endif
40 #ifdef HAVE_SYS_EXTATTR_H
41 #include <sys/extattr.h>
42 #endif
43 #ifdef HAVE_SYS_IOCTL_H
44 #include <sys/ioctl.h>
45 #endif
46 #ifdef HAVE_SYS_PARAM_H
47 #include <sys/param.h>
48 #endif
49 #ifdef HAVE_SYS_STAT_H
50 #include <sys/stat.h>
51 #endif
52 #if defined(HAVE_SYS_XATTR_H)
53 #include <sys/xattr.h>
54 #elif defined(HAVE_ATTR_XATTR_H)
55 #include <attr/xattr.h>
56 #endif
57 #ifdef HAVE_SYS_EA_H
58 #include <sys/ea.h>
59 #endif
60 #ifdef HAVE_ACL_LIBACL_H
61 #include <acl/libacl.h>
62 #endif
63 #ifdef HAVE_COPYFILE_H
64 #include <copyfile.h>
65 #endif
66 #ifdef HAVE_ERRNO_H
67 #include <errno.h>
68 #endif
69 #ifdef HAVE_FCNTL_H
70 #include <fcntl.h>
71 #endif
72 #ifdef HAVE_LIMITS_H
73 #include <limits.h>
74 #endif
75 #ifdef HAVE_LINUX_TYPES_H
76 #include <linux/types.h>
77 #endif
78 #ifdef HAVE_LINUX_FIEMAP_H
79 #include <linux/fiemap.h>
80 #endif
81 #ifdef HAVE_LINUX_FS_H
82 #include <linux/fs.h>
83 #endif
84 /*
85 * Some Linux distributions have both linux/ext2_fs.h and ext2fs/ext2_fs.h.
86 * As the include guards don't agree, the order of include is important.
87 */
88 #ifdef HAVE_LINUX_EXT2_FS_H
89 #include <linux/ext2_fs.h> /* for Linux file flags */
90 #endif
91 #if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__)
92 #include <ext2fs/ext2_fs.h> /* Linux file flags, broken on Cygwin */
93 #endif
94 #ifdef HAVE_PATHS_H
95 #include <paths.h>
96 #endif
97 #ifdef HAVE_UNISTD_H
98 #include <unistd.h>
99 #endif
100
101 #include "archive.h"
102 #include "archive_entry.h"
103 #include "archive_private.h"
104 #include "archive_read_disk_private.h"
105
106 #ifndef O_CLOEXEC
107 #define O_CLOEXEC 0
108 #endif
109
110 /*
111 * Linux and FreeBSD plug this obvious hole in POSIX.1e in
112 * different ways.
113 */
114 #if HAVE_ACL_GET_PERM
115 #define ACL_GET_PERM acl_get_perm
116 #elif HAVE_ACL_GET_PERM_NP
117 #define ACL_GET_PERM acl_get_perm_np
118 #endif
119
120 static int setup_acls(struct archive_read_disk *,
121 struct archive_entry *, int *fd);
122 static int setup_mac_metadata(struct archive_read_disk *,
123 struct archive_entry *, int *fd);
124 static int setup_xattrs(struct archive_read_disk *,
125 struct archive_entry *, int *fd);
126 static int setup_sparse(struct archive_read_disk *,
127 struct archive_entry *, int *fd);
128
129 int
archive_read_disk_entry_from_file(struct archive * _a,struct archive_entry * entry,int fd,const struct stat * st)130 archive_read_disk_entry_from_file(struct archive *_a,
131 struct archive_entry *entry,
132 int fd,
133 const struct stat *st)
134 {
135 struct archive_read_disk *a = (struct archive_read_disk *)_a;
136 const char *path, *name;
137 struct stat s;
138 int initial_fd = fd;
139 int r, r1;
140
141 archive_clear_error(_a);
142 path = archive_entry_sourcepath(entry);
143 if (path == NULL)
144 path = archive_entry_pathname(entry);
145
146 if (a->tree == NULL) {
147 if (st == NULL) {
148 #if HAVE_FSTAT
149 if (fd >= 0) {
150 if (fstat(fd, &s) != 0) {
151 archive_set_error(&a->archive, errno,
152 "Can't fstat");
153 return (ARCHIVE_FAILED);
154 }
155 } else
156 #endif
157 #if HAVE_LSTAT
158 if (!a->follow_symlinks) {
159 if (lstat(path, &s) != 0) {
160 archive_set_error(&a->archive, errno,
161 "Can't lstat %s", path);
162 return (ARCHIVE_FAILED);
163 }
164 } else
165 #endif
166 if (stat(path, &s) != 0) {
167 archive_set_error(&a->archive, errno,
168 "Can't stat %s", path);
169 return (ARCHIVE_FAILED);
170 }
171 st = &s;
172 }
173 archive_entry_copy_stat(entry, st);
174 }
175
176 /* Lookup uname/gname */
177 name = archive_read_disk_uname(_a, archive_entry_uid(entry));
178 if (name != NULL)
179 archive_entry_copy_uname(entry, name);
180 name = archive_read_disk_gname(_a, archive_entry_gid(entry));
181 if (name != NULL)
182 archive_entry_copy_gname(entry, name);
183
184 #ifdef HAVE_STRUCT_STAT_ST_FLAGS
185 /* On FreeBSD, we get flags for free with the stat. */
186 /* TODO: Does this belong in copy_stat()? */
187 if (st->st_flags != 0)
188 archive_entry_set_fflags(entry, st->st_flags, 0);
189 #endif
190
191 #if defined(EXT2_IOC_GETFLAGS) && defined(HAVE_WORKING_EXT2_IOC_GETFLAGS)
192 /* Linux requires an extra ioctl to pull the flags. Although
193 * this is an extra step, it has a nice side-effect: We get an
194 * open file descriptor which we can use in the subsequent lookups. */
195 if ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode))) {
196 if (fd < 0) {
197 if (a->tree != NULL)
198 fd = a->open_on_current_dir(a->tree, path,
199 O_RDONLY | O_NONBLOCK | O_CLOEXEC);
200 else
201 fd = open(path, O_RDONLY | O_NONBLOCK |
202 O_CLOEXEC);
203 __archive_ensure_cloexec_flag(fd);
204 }
205 if (fd >= 0) {
206 int stflags;
207 r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags);
208 if (r == 0 && stflags != 0)
209 archive_entry_set_fflags(entry, stflags, 0);
210 }
211 }
212 #endif
213
214 #if defined(HAVE_READLINK) || defined(HAVE_READLINKAT)
215 if (S_ISLNK(st->st_mode)) {
216 size_t linkbuffer_len = st->st_size + 1;
217 char *linkbuffer;
218 int lnklen;
219
220 linkbuffer = malloc(linkbuffer_len);
221 if (linkbuffer == NULL) {
222 archive_set_error(&a->archive, ENOMEM,
223 "Couldn't read link data");
224 return (ARCHIVE_FAILED);
225 }
226 if (a->tree != NULL) {
227 #ifdef HAVE_READLINKAT
228 lnklen = readlinkat(a->tree_current_dir_fd(a->tree),
229 path, linkbuffer, linkbuffer_len);
230 #else
231 if (a->tree_enter_working_dir(a->tree) != 0) {
232 archive_set_error(&a->archive, errno,
233 "Couldn't read link data");
234 free(linkbuffer);
235 return (ARCHIVE_FAILED);
236 }
237 lnklen = readlink(path, linkbuffer, linkbuffer_len);
238 #endif /* HAVE_READLINKAT */
239 } else
240 lnklen = readlink(path, linkbuffer, linkbuffer_len);
241 if (lnklen < 0) {
242 archive_set_error(&a->archive, errno,
243 "Couldn't read link data");
244 free(linkbuffer);
245 return (ARCHIVE_FAILED);
246 }
247 linkbuffer[lnklen] = 0;
248 archive_entry_set_symlink(entry, linkbuffer);
249 free(linkbuffer);
250 }
251 #endif /* HAVE_READLINK || HAVE_READLINKAT */
252
253 r = setup_acls(a, entry, &fd);
254 r1 = setup_xattrs(a, entry, &fd);
255 if (r1 < r)
256 r = r1;
257 if (a->enable_copyfile) {
258 r1 = setup_mac_metadata(a, entry, &fd);
259 if (r1 < r)
260 r = r1;
261 }
262 r1 = setup_sparse(a, entry, &fd);
263 if (r1 < r)
264 r = r1;
265
266 /* If we opened the file earlier in this function, close it. */
267 if (initial_fd != fd)
268 close(fd);
269 return (r);
270 }
271
272 #if defined(__APPLE__) && defined(HAVE_COPYFILE_H)
273 /*
274 * The Mac OS "copyfile()" API copies the extended metadata for a
275 * file into a separate file in AppleDouble format (see RFC 1740).
276 *
277 * Mac OS tar and cpio implementations store this extended
278 * metadata as a separate entry just before the regular entry
279 * with a "._" prefix added to the filename.
280 *
281 * Note that this is currently done unconditionally; the tar program has
282 * an option to discard this information before the archive is written.
283 *
284 * TODO: If there's a failure, report it and return ARCHIVE_WARN.
285 */
286 static int
setup_mac_metadata(struct archive_read_disk * a,struct archive_entry * entry,int * fd)287 setup_mac_metadata(struct archive_read_disk *a,
288 struct archive_entry *entry, int *fd)
289 {
290 int tempfd = -1;
291 int copyfile_flags = COPYFILE_NOFOLLOW | COPYFILE_ACL | COPYFILE_XATTR;
292 struct stat copyfile_stat;
293 int ret = ARCHIVE_OK;
294 void *buff = NULL;
295 int have_attrs;
296 const char *name, *tempdir;
297 struct archive_string tempfile;
298
299 (void)fd; /* UNUSED */
300 name = archive_entry_sourcepath(entry);
301 if (name == NULL)
302 name = archive_entry_pathname(entry);
303 if (name == NULL) {
304 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
305 "Can't open file to read extended attributes: No name");
306 return (ARCHIVE_WARN);
307 }
308
309 if (a->tree != NULL) {
310 if (a->tree_enter_working_dir(a->tree) != 0) {
311 archive_set_error(&a->archive, errno,
312 "Couldn't change dir");
313 return (ARCHIVE_FAILED);
314 }
315 }
316
317 /* Short-circuit if there's nothing to do. */
318 have_attrs = copyfile(name, NULL, 0, copyfile_flags | COPYFILE_CHECK);
319 if (have_attrs == -1) {
320 archive_set_error(&a->archive, errno,
321 "Could not check extended attributes");
322 return (ARCHIVE_WARN);
323 }
324 if (have_attrs == 0)
325 return (ARCHIVE_OK);
326
327 tempdir = NULL;
328 if (issetugid() == 0)
329 tempdir = getenv("TMPDIR");
330 if (tempdir == NULL)
331 tempdir = _PATH_TMP;
332 archive_string_init(&tempfile);
333 archive_strcpy(&tempfile, tempdir);
334 archive_strcat(&tempfile, "tar.md.XXXXXX");
335 tempfd = mkstemp(tempfile.s);
336 if (tempfd < 0) {
337 archive_set_error(&a->archive, errno,
338 "Could not open extended attribute file");
339 ret = ARCHIVE_WARN;
340 goto cleanup;
341 }
342 __archive_ensure_cloexec_flag(tempfd);
343
344 /* XXX I wish copyfile() could pack directly to a memory
345 * buffer; that would avoid the temp file here. For that
346 * matter, it would be nice if fcopyfile() actually worked,
347 * that would reduce the many open/close races here. */
348 if (copyfile(name, tempfile.s, 0, copyfile_flags | COPYFILE_PACK)) {
349 archive_set_error(&a->archive, errno,
350 "Could not pack extended attributes");
351 ret = ARCHIVE_WARN;
352 goto cleanup;
353 }
354 if (fstat(tempfd, ©file_stat)) {
355 archive_set_error(&a->archive, errno,
356 "Could not check size of extended attributes");
357 ret = ARCHIVE_WARN;
358 goto cleanup;
359 }
360 buff = malloc(copyfile_stat.st_size);
361 if (buff == NULL) {
362 archive_set_error(&a->archive, errno,
363 "Could not allocate memory for extended attributes");
364 ret = ARCHIVE_WARN;
365 goto cleanup;
366 }
367 if (copyfile_stat.st_size != read(tempfd, buff, copyfile_stat.st_size)) {
368 archive_set_error(&a->archive, errno,
369 "Could not read extended attributes into memory");
370 ret = ARCHIVE_WARN;
371 goto cleanup;
372 }
373 archive_entry_copy_mac_metadata(entry, buff, copyfile_stat.st_size);
374
375 cleanup:
376 if (tempfd >= 0) {
377 close(tempfd);
378 unlink(tempfile.s);
379 }
380 archive_string_free(&tempfile);
381 free(buff);
382 return (ret);
383 }
384
385 #else
386
387 /*
388 * Stub implementation for non-Mac systems.
389 */
390 static int
setup_mac_metadata(struct archive_read_disk * a,struct archive_entry * entry,int * fd)391 setup_mac_metadata(struct archive_read_disk *a,
392 struct archive_entry *entry, int *fd)
393 {
394 (void)a; /* UNUSED */
395 (void)entry; /* UNUSED */
396 (void)fd; /* UNUSED */
397 return (ARCHIVE_OK);
398 }
399 #endif
400
401
402 #if defined(HAVE_POSIX_ACL) && defined(ACL_TYPE_NFS4)
403 static int translate_acl(struct archive_read_disk *a,
404 struct archive_entry *entry, acl_t acl, int archive_entry_acl_type);
405
406 static int
setup_acls(struct archive_read_disk * a,struct archive_entry * entry,int * fd)407 setup_acls(struct archive_read_disk *a,
408 struct archive_entry *entry, int *fd)
409 {
410 const char *accpath;
411 acl_t acl;
412 #if HAVE_ACL_IS_TRIVIAL_NP
413 int r;
414 #endif
415
416 accpath = archive_entry_sourcepath(entry);
417 if (accpath == NULL)
418 accpath = archive_entry_pathname(entry);
419
420 archive_entry_acl_clear(entry);
421
422 /* Try NFS4 ACL first. */
423 if (*fd >= 0)
424 acl = acl_get_fd(*fd);
425 #if HAVE_ACL_GET_LINK_NP
426 else if (!a->follow_symlinks)
427 acl = acl_get_link_np(accpath, ACL_TYPE_NFS4);
428 #else
429 else if ((!a->follow_symlinks)
430 && (archive_entry_filetype(entry) == AE_IFLNK))
431 /* We can't get the ACL of a symlink, so we assume it can't
432 have one. */
433 acl = NULL;
434 #endif
435 else
436 acl = acl_get_file(accpath, ACL_TYPE_NFS4);
437 #if HAVE_ACL_IS_TRIVIAL_NP
438 /* Ignore "trivial" ACLs that just mirror the file mode. */
439 acl_is_trivial_np(acl, &r);
440 if (r) {
441 acl_free(acl);
442 acl = NULL;
443 }
444 #endif
445 if (acl != NULL) {
446 translate_acl(a, entry, acl, ARCHIVE_ENTRY_ACL_TYPE_NFS4);
447 acl_free(acl);
448 return (ARCHIVE_OK);
449 }
450
451 /* Retrieve access ACL from file. */
452 if (*fd >= 0)
453 acl = acl_get_fd(*fd);
454 #if HAVE_ACL_GET_LINK_NP
455 else if (!a->follow_symlinks)
456 acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS);
457 #else
458 else if ((!a->follow_symlinks)
459 && (archive_entry_filetype(entry) == AE_IFLNK))
460 /* We can't get the ACL of a symlink, so we assume it can't
461 have one. */
462 acl = NULL;
463 #endif
464 else
465 acl = acl_get_file(accpath, ACL_TYPE_ACCESS);
466 if (acl != NULL) {
467 translate_acl(a, entry, acl,
468 ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
469 acl_free(acl);
470 }
471
472 /* Only directories can have default ACLs. */
473 if (S_ISDIR(archive_entry_mode(entry))) {
474 acl = acl_get_file(accpath, ACL_TYPE_DEFAULT);
475 if (acl != NULL) {
476 translate_acl(a, entry, acl,
477 ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
478 acl_free(acl);
479 }
480 }
481 return (ARCHIVE_OK);
482 }
483
484 /*
485 * Translate system ACL into libarchive internal structure.
486 */
487
488 static struct {
489 int archive_perm;
490 int platform_perm;
491 } acl_perm_map[] = {
492 {ARCHIVE_ENTRY_ACL_EXECUTE, ACL_EXECUTE},
493 {ARCHIVE_ENTRY_ACL_WRITE, ACL_WRITE},
494 {ARCHIVE_ENTRY_ACL_READ, ACL_READ},
495 {ARCHIVE_ENTRY_ACL_READ_DATA, ACL_READ_DATA},
496 {ARCHIVE_ENTRY_ACL_LIST_DIRECTORY, ACL_LIST_DIRECTORY},
497 {ARCHIVE_ENTRY_ACL_WRITE_DATA, ACL_WRITE_DATA},
498 {ARCHIVE_ENTRY_ACL_ADD_FILE, ACL_ADD_FILE},
499 {ARCHIVE_ENTRY_ACL_APPEND_DATA, ACL_APPEND_DATA},
500 {ARCHIVE_ENTRY_ACL_ADD_SUBDIRECTORY, ACL_ADD_SUBDIRECTORY},
501 {ARCHIVE_ENTRY_ACL_READ_NAMED_ATTRS, ACL_READ_NAMED_ATTRS},
502 {ARCHIVE_ENTRY_ACL_WRITE_NAMED_ATTRS, ACL_WRITE_NAMED_ATTRS},
503 {ARCHIVE_ENTRY_ACL_DELETE_CHILD, ACL_DELETE_CHILD},
504 {ARCHIVE_ENTRY_ACL_READ_ATTRIBUTES, ACL_READ_ATTRIBUTES},
505 {ARCHIVE_ENTRY_ACL_WRITE_ATTRIBUTES, ACL_WRITE_ATTRIBUTES},
506 {ARCHIVE_ENTRY_ACL_DELETE, ACL_DELETE},
507 {ARCHIVE_ENTRY_ACL_READ_ACL, ACL_READ_ACL},
508 {ARCHIVE_ENTRY_ACL_WRITE_ACL, ACL_WRITE_ACL},
509 {ARCHIVE_ENTRY_ACL_WRITE_OWNER, ACL_WRITE_OWNER},
510 {ARCHIVE_ENTRY_ACL_SYNCHRONIZE, ACL_SYNCHRONIZE}
511 };
512
513 static struct {
514 int archive_inherit;
515 int platform_inherit;
516 } acl_inherit_map[] = {
517 {ARCHIVE_ENTRY_ACL_ENTRY_FILE_INHERIT, ACL_ENTRY_FILE_INHERIT},
518 {ARCHIVE_ENTRY_ACL_ENTRY_DIRECTORY_INHERIT, ACL_ENTRY_DIRECTORY_INHERIT},
519 {ARCHIVE_ENTRY_ACL_ENTRY_NO_PROPAGATE_INHERIT, ACL_ENTRY_NO_PROPAGATE_INHERIT},
520 {ARCHIVE_ENTRY_ACL_ENTRY_INHERIT_ONLY, ACL_ENTRY_INHERIT_ONLY}
521 };
522
523 static int
translate_acl(struct archive_read_disk * a,struct archive_entry * entry,acl_t acl,int default_entry_acl_type)524 translate_acl(struct archive_read_disk *a,
525 struct archive_entry *entry, acl_t acl, int default_entry_acl_type)
526 {
527 acl_tag_t acl_tag;
528 acl_entry_type_t acl_type;
529 acl_flagset_t acl_flagset;
530 acl_entry_t acl_entry;
531 acl_permset_t acl_permset;
532 int brand, i, r, entry_acl_type;
533 int s, ae_id, ae_tag, ae_perm;
534 const char *ae_name;
535
536 // FreeBSD "brands" ACLs as POSIX.1e or NFSv4
537 // Make sure the "brand" on this ACL is consistent
538 // with the default_entry_acl_type bits provided.
539 acl_get_brand_np(acl, &brand);
540 switch (brand) {
541 case ACL_BRAND_POSIX:
542 switch (default_entry_acl_type) {
543 case ARCHIVE_ENTRY_ACL_TYPE_ACCESS:
544 case ARCHIVE_ENTRY_ACL_TYPE_DEFAULT:
545 break;
546 default:
547 // XXX set warning message?
548 return ARCHIVE_FAILED;
549 }
550 break;
551 case ACL_BRAND_NFS4:
552 if (default_entry_acl_type & ~ARCHIVE_ENTRY_ACL_TYPE_NFS4) {
553 // XXX set warning message?
554 return ARCHIVE_FAILED;
555 }
556 break;
557 default:
558 // XXX set warning message?
559 return ARCHIVE_FAILED;
560 break;
561 }
562
563
564 s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
565 while (s == 1) {
566 ae_id = -1;
567 ae_name = NULL;
568 ae_perm = 0;
569
570 acl_get_tag_type(acl_entry, &acl_tag);
571 switch (acl_tag) {
572 case ACL_USER:
573 ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry);
574 ae_name = archive_read_disk_uname(&a->archive, ae_id);
575 ae_tag = ARCHIVE_ENTRY_ACL_USER;
576 break;
577 case ACL_GROUP:
578 ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry);
579 ae_name = archive_read_disk_gname(&a->archive, ae_id);
580 ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
581 break;
582 case ACL_MASK:
583 ae_tag = ARCHIVE_ENTRY_ACL_MASK;
584 break;
585 case ACL_USER_OBJ:
586 ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
587 break;
588 case ACL_GROUP_OBJ:
589 ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
590 break;
591 case ACL_OTHER:
592 ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
593 break;
594 case ACL_EVERYONE:
595 ae_tag = ARCHIVE_ENTRY_ACL_EVERYONE;
596 break;
597 default:
598 /* Skip types that libarchive can't support. */
599 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
600 continue;
601 }
602
603 // XXX acl type maps to allow/deny/audit/YYYY bits
604 // XXX acl_get_entry_type_np on FreeBSD returns EINVAL for
605 // non-NFSv4 ACLs
606 entry_acl_type = default_entry_acl_type;
607 r = acl_get_entry_type_np(acl_entry, &acl_type);
608 if (r == 0) {
609 switch (acl_type) {
610 case ACL_ENTRY_TYPE_ALLOW:
611 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALLOW;
612 break;
613 case ACL_ENTRY_TYPE_DENY:
614 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_DENY;
615 break;
616 case ACL_ENTRY_TYPE_AUDIT:
617 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_AUDIT;
618 break;
619 case ACL_ENTRY_TYPE_ALARM:
620 entry_acl_type = ARCHIVE_ENTRY_ACL_TYPE_ALARM;
621 break;
622 }
623 }
624
625 /*
626 * Libarchive stores "flag" (NFSv4 inheritance bits)
627 * in the ae_perm bitmap.
628 */
629 acl_get_flagset_np(acl_entry, &acl_flagset);
630 for (i = 0; i < (int)(sizeof(acl_inherit_map) / sizeof(acl_inherit_map[0])); ++i) {
631 if (acl_get_flag_np(acl_flagset,
632 acl_inherit_map[i].platform_inherit))
633 ae_perm |= acl_inherit_map[i].archive_inherit;
634
635 }
636
637 acl_get_permset(acl_entry, &acl_permset);
638 for (i = 0; i < (int)(sizeof(acl_perm_map) / sizeof(acl_perm_map[0])); ++i) {
639 /*
640 * acl_get_perm() is spelled differently on different
641 * platforms; see above.
642 */
643 if (ACL_GET_PERM(acl_permset, acl_perm_map[i].platform_perm))
644 ae_perm |= acl_perm_map[i].archive_perm;
645 }
646
647 archive_entry_acl_add_entry(entry, entry_acl_type,
648 ae_perm, ae_tag,
649 ae_id, ae_name);
650
651 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
652 }
653 return (ARCHIVE_OK);
654 }
655 #else
656 static int
setup_acls(struct archive_read_disk * a,struct archive_entry * entry,int * fd)657 setup_acls(struct archive_read_disk *a,
658 struct archive_entry *entry, int *fd)
659 {
660 (void)a; /* UNUSED */
661 (void)entry; /* UNUSED */
662 (void)fd; /* UNUSED */
663 return (ARCHIVE_OK);
664 }
665 #endif
666
667 #if (HAVE_FGETXATTR && HAVE_FLISTXATTR && HAVE_LISTXATTR && \
668 HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR) || \
669 (HAVE_FGETEA && HAVE_FLISTEA && HAVE_LISTEA)
670
671 /*
672 * Linux and AIX extended attribute support.
673 *
674 * TODO: By using a stack-allocated buffer for the first
675 * call to getxattr(), we might be able to avoid the second
676 * call entirely. We only need the second call if the
677 * stack-allocated buffer is too small. But a modest buffer
678 * of 1024 bytes or so will often be big enough. Same applies
679 * to listxattr().
680 */
681
682
683 static int
setup_xattr(struct archive_read_disk * a,struct archive_entry * entry,const char * name,int fd)684 setup_xattr(struct archive_read_disk *a,
685 struct archive_entry *entry, const char *name, int fd)
686 {
687 ssize_t size;
688 void *value = NULL;
689 const char *accpath;
690
691 accpath = archive_entry_sourcepath(entry);
692 if (accpath == NULL)
693 accpath = archive_entry_pathname(entry);
694
695 #if HAVE_FGETXATTR
696 if (fd >= 0)
697 size = fgetxattr(fd, name, NULL, 0);
698 else if (!a->follow_symlinks)
699 size = lgetxattr(accpath, name, NULL, 0);
700 else
701 size = getxattr(accpath, name, NULL, 0);
702 #elif HAVE_FGETEA
703 if (fd >= 0)
704 size = fgetea(fd, name, NULL, 0);
705 else if (!a->follow_symlinks)
706 size = lgetea(accpath, name, NULL, 0);
707 else
708 size = getea(accpath, name, NULL, 0);
709 #endif
710
711 if (size == -1) {
712 archive_set_error(&a->archive, errno,
713 "Couldn't query extended attribute");
714 return (ARCHIVE_WARN);
715 }
716
717 if (size > 0 && (value = malloc(size)) == NULL) {
718 archive_set_error(&a->archive, errno, "Out of memory");
719 return (ARCHIVE_FATAL);
720 }
721
722 #if HAVE_FGETXATTR
723 if (fd >= 0)
724 size = fgetxattr(fd, name, value, size);
725 else if (!a->follow_symlinks)
726 size = lgetxattr(accpath, name, value, size);
727 else
728 size = getxattr(accpath, name, value, size);
729 #elif HAVE_FGETEA
730 if (fd >= 0)
731 size = fgetea(fd, name, value, size);
732 else if (!a->follow_symlinks)
733 size = lgetea(accpath, name, value, size);
734 else
735 size = getea(accpath, name, value, size);
736 #endif
737
738 if (size == -1) {
739 archive_set_error(&a->archive, errno,
740 "Couldn't read extended attribute");
741 return (ARCHIVE_WARN);
742 }
743
744 archive_entry_xattr_add_entry(entry, name, value, size);
745
746 free(value);
747 return (ARCHIVE_OK);
748 }
749
750 static int
setup_xattrs(struct archive_read_disk * a,struct archive_entry * entry,int * fd)751 setup_xattrs(struct archive_read_disk *a,
752 struct archive_entry *entry, int *fd)
753 {
754 char *list, *p;
755 const char *path;
756 ssize_t list_size;
757
758 path = archive_entry_sourcepath(entry);
759 if (path == NULL)
760 path = archive_entry_pathname(entry);
761
762 if (*fd < 0 && a->tree != NULL) {
763 if (a->follow_symlinks ||
764 archive_entry_filetype(entry) != AE_IFLNK)
765 *fd = a->open_on_current_dir(a->tree, path,
766 O_RDONLY | O_NONBLOCK);
767 if (*fd < 0) {
768 if (a->tree_enter_working_dir(a->tree) != 0) {
769 archive_set_error(&a->archive, errno,
770 "Couldn't access %s", path);
771 return (ARCHIVE_FAILED);
772 }
773 }
774 }
775
776 #if HAVE_FLISTXATTR
777 if (*fd >= 0)
778 list_size = flistxattr(*fd, NULL, 0);
779 else if (!a->follow_symlinks)
780 list_size = llistxattr(path, NULL, 0);
781 else
782 list_size = listxattr(path, NULL, 0);
783 #elif HAVE_FLISTEA
784 if (*fd >= 0)
785 list_size = flistea(*fd, NULL, 0);
786 else if (!a->follow_symlinks)
787 list_size = llistea(path, NULL, 0);
788 else
789 list_size = listea(path, NULL, 0);
790 #endif
791
792 if (list_size == -1) {
793 if (errno == ENOTSUP || errno == ENOSYS)
794 return (ARCHIVE_OK);
795 archive_set_error(&a->archive, errno,
796 "Couldn't list extended attributes");
797 return (ARCHIVE_WARN);
798 }
799
800 if (list_size == 0)
801 return (ARCHIVE_OK);
802
803 if ((list = malloc(list_size)) == NULL) {
804 archive_set_error(&a->archive, errno, "Out of memory");
805 return (ARCHIVE_FATAL);
806 }
807
808 #if HAVE_FLISTXATTR
809 if (*fd >= 0)
810 list_size = flistxattr(*fd, list, list_size);
811 else if (!a->follow_symlinks)
812 list_size = llistxattr(path, list, list_size);
813 else
814 list_size = listxattr(path, list, list_size);
815 #elif HAVE_FLISTEA
816 if (*fd >= 0)
817 list_size = flistea(*fd, list, list_size);
818 else if (!a->follow_symlinks)
819 list_size = llistea(path, list, list_size);
820 else
821 list_size = listea(path, list, list_size);
822 #endif
823
824 if (list_size == -1) {
825 archive_set_error(&a->archive, errno,
826 "Couldn't retrieve extended attributes");
827 free(list);
828 return (ARCHIVE_WARN);
829 }
830
831 for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
832 if (strncmp(p, "system.", 7) == 0 ||
833 strncmp(p, "xfsroot.", 8) == 0)
834 continue;
835 setup_xattr(a, entry, p, *fd);
836 }
837
838 free(list);
839 return (ARCHIVE_OK);
840 }
841
842 #elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE && \
843 HAVE_DECL_EXTATTR_NAMESPACE_USER
844
845 /*
846 * FreeBSD extattr interface.
847 */
848
849 /* TODO: Implement this. Follow the Linux model above, but
850 * with FreeBSD-specific system calls, of course. Be careful
851 * to not include the system extattrs that hold ACLs; we handle
852 * those separately.
853 */
854 static int
855 setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
856 int namespace, const char *name, const char *fullname, int fd);
857
858 static int
setup_xattr(struct archive_read_disk * a,struct archive_entry * entry,int namespace,const char * name,const char * fullname,int fd)859 setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
860 int namespace, const char *name, const char *fullname, int fd)
861 {
862 ssize_t size;
863 void *value = NULL;
864 const char *accpath;
865
866 accpath = archive_entry_sourcepath(entry);
867 if (accpath == NULL)
868 accpath = archive_entry_pathname(entry);
869
870 if (fd >= 0)
871 size = extattr_get_fd(fd, namespace, name, NULL, 0);
872 else if (!a->follow_symlinks)
873 size = extattr_get_link(accpath, namespace, name, NULL, 0);
874 else
875 size = extattr_get_file(accpath, namespace, name, NULL, 0);
876
877 if (size == -1) {
878 archive_set_error(&a->archive, errno,
879 "Couldn't query extended attribute");
880 return (ARCHIVE_WARN);
881 }
882
883 if (size > 0 && (value = malloc(size)) == NULL) {
884 archive_set_error(&a->archive, errno, "Out of memory");
885 return (ARCHIVE_FATAL);
886 }
887
888 if (fd >= 0)
889 size = extattr_get_fd(fd, namespace, name, value, size);
890 else if (!a->follow_symlinks)
891 size = extattr_get_link(accpath, namespace, name, value, size);
892 else
893 size = extattr_get_file(accpath, namespace, name, value, size);
894
895 if (size == -1) {
896 free(value);
897 archive_set_error(&a->archive, errno,
898 "Couldn't read extended attribute");
899 return (ARCHIVE_WARN);
900 }
901
902 archive_entry_xattr_add_entry(entry, fullname, value, size);
903
904 free(value);
905 return (ARCHIVE_OK);
906 }
907
908 static int
setup_xattrs(struct archive_read_disk * a,struct archive_entry * entry,int * fd)909 setup_xattrs(struct archive_read_disk *a,
910 struct archive_entry *entry, int *fd)
911 {
912 char buff[512];
913 char *list, *p;
914 ssize_t list_size;
915 const char *path;
916 int namespace = EXTATTR_NAMESPACE_USER;
917
918 path = archive_entry_sourcepath(entry);
919 if (path == NULL)
920 path = archive_entry_pathname(entry);
921
922 if (*fd < 0 && a->tree != NULL) {
923 if (a->follow_symlinks ||
924 archive_entry_filetype(entry) != AE_IFLNK)
925 *fd = a->open_on_current_dir(a->tree, path,
926 O_RDONLY | O_NONBLOCK);
927 if (*fd < 0) {
928 if (a->tree_enter_working_dir(a->tree) != 0) {
929 archive_set_error(&a->archive, errno,
930 "Couldn't access %s", path);
931 return (ARCHIVE_FAILED);
932 }
933 }
934 }
935
936 if (*fd >= 0)
937 list_size = extattr_list_fd(*fd, namespace, NULL, 0);
938 else if (!a->follow_symlinks)
939 list_size = extattr_list_link(path, namespace, NULL, 0);
940 else
941 list_size = extattr_list_file(path, namespace, NULL, 0);
942
943 if (list_size == -1 && errno == EOPNOTSUPP)
944 return (ARCHIVE_OK);
945 if (list_size == -1) {
946 archive_set_error(&a->archive, errno,
947 "Couldn't list extended attributes");
948 return (ARCHIVE_WARN);
949 }
950
951 if (list_size == 0)
952 return (ARCHIVE_OK);
953
954 if ((list = malloc(list_size)) == NULL) {
955 archive_set_error(&a->archive, errno, "Out of memory");
956 return (ARCHIVE_FATAL);
957 }
958
959 if (*fd >= 0)
960 list_size = extattr_list_fd(*fd, namespace, list, list_size);
961 else if (!a->follow_symlinks)
962 list_size = extattr_list_link(path, namespace, list, list_size);
963 else
964 list_size = extattr_list_file(path, namespace, list, list_size);
965
966 if (list_size == -1) {
967 archive_set_error(&a->archive, errno,
968 "Couldn't retrieve extended attributes");
969 free(list);
970 return (ARCHIVE_WARN);
971 }
972
973 p = list;
974 while ((p - list) < list_size) {
975 size_t len = 255 & (int)*p;
976 char *name;
977
978 strcpy(buff, "user.");
979 name = buff + strlen(buff);
980 memcpy(name, p + 1, len);
981 name[len] = '\0';
982 setup_xattr(a, entry, namespace, name, buff, *fd);
983 p += 1 + len;
984 }
985
986 free(list);
987 return (ARCHIVE_OK);
988 }
989
990 #else
991
992 /*
993 * Generic (stub) extended attribute support.
994 */
995 static int
setup_xattrs(struct archive_read_disk * a,struct archive_entry * entry,int * fd)996 setup_xattrs(struct archive_read_disk *a,
997 struct archive_entry *entry, int *fd)
998 {
999 (void)a; /* UNUSED */
1000 (void)entry; /* UNUSED */
1001 (void)fd; /* UNUSED */
1002 return (ARCHIVE_OK);
1003 }
1004
1005 #endif
1006
1007 #if defined(HAVE_LINUX_FIEMAP_H)
1008
1009 /*
1010 * Linux sparse interface.
1011 *
1012 * The FIEMAP ioctl returns an "extent" for each physical allocation
1013 * on disk. We need to process those to generate a more compact list
1014 * of logical file blocks. We also need to be very careful to use
1015 * FIEMAP_FLAG_SYNC here, since there are reports that Linux sometimes
1016 * does not report allocations for newly-written data that hasn't
1017 * been synced to disk.
1018 *
1019 * It's important to return a minimal sparse file list because we want
1020 * to not trigger sparse file extensions if we don't have to, since
1021 * not all readers support them.
1022 */
1023
1024 static int
setup_sparse(struct archive_read_disk * a,struct archive_entry * entry,int * fd)1025 setup_sparse(struct archive_read_disk *a,
1026 struct archive_entry *entry, int *fd)
1027 {
1028 char buff[4096];
1029 struct fiemap *fm;
1030 struct fiemap_extent *fe;
1031 int64_t size;
1032 int count, do_fiemap;
1033 int exit_sts = ARCHIVE_OK;
1034
1035 if (archive_entry_filetype(entry) != AE_IFREG
1036 || archive_entry_size(entry) <= 0
1037 || archive_entry_hardlink(entry) != NULL)
1038 return (ARCHIVE_OK);
1039
1040 if (*fd < 0) {
1041 const char *path;
1042
1043 path = archive_entry_sourcepath(entry);
1044 if (path == NULL)
1045 path = archive_entry_pathname(entry);
1046 if (a->tree != NULL)
1047 *fd = a->open_on_current_dir(a->tree, path,
1048 O_RDONLY | O_NONBLOCK | O_CLOEXEC);
1049 else
1050 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
1051 if (*fd < 0) {
1052 archive_set_error(&a->archive, errno,
1053 "Can't open `%s'", path);
1054 return (ARCHIVE_FAILED);
1055 }
1056 __archive_ensure_cloexec_flag(*fd);
1057 }
1058
1059 /* Initialize buffer to avoid the error valgrind complains about. */
1060 memset(buff, 0, sizeof(buff));
1061 count = (sizeof(buff) - sizeof(*fm))/sizeof(*fe);
1062 fm = (struct fiemap *)buff;
1063 fm->fm_start = 0;
1064 fm->fm_length = ~0ULL;;
1065 fm->fm_flags = FIEMAP_FLAG_SYNC;
1066 fm->fm_extent_count = count;
1067 do_fiemap = 1;
1068 size = archive_entry_size(entry);
1069 for (;;) {
1070 int i, r;
1071
1072 r = ioctl(*fd, FS_IOC_FIEMAP, fm);
1073 if (r < 0) {
1074 /* When something error happens, it is better we
1075 * should return ARCHIVE_OK because an earlier
1076 * version(<2.6.28) cannot perfom FS_IOC_FIEMAP. */
1077 goto exit_setup_sparse;
1078 }
1079 if (fm->fm_mapped_extents == 0)
1080 break;
1081 fe = fm->fm_extents;
1082 for (i = 0; i < (int)fm->fm_mapped_extents; i++, fe++) {
1083 if (!(fe->fe_flags & FIEMAP_EXTENT_UNWRITTEN)) {
1084 /* The fe_length of the last block does not
1085 * adjust itself to its size files. */
1086 int64_t length = fe->fe_length;
1087 if (fe->fe_logical + length > (uint64_t)size)
1088 length -= fe->fe_logical + length - size;
1089 if (fe->fe_logical == 0 && length == size) {
1090 /* This is not sparse. */
1091 do_fiemap = 0;
1092 break;
1093 }
1094 if (length > 0)
1095 archive_entry_sparse_add_entry(entry,
1096 fe->fe_logical, length);
1097 }
1098 if (fe->fe_flags & FIEMAP_EXTENT_LAST)
1099 do_fiemap = 0;
1100 }
1101 if (do_fiemap) {
1102 fe = fm->fm_extents + fm->fm_mapped_extents -1;
1103 fm->fm_start = fe->fe_logical + fe->fe_length;
1104 } else
1105 break;
1106 }
1107 exit_setup_sparse:
1108 return (exit_sts);
1109 }
1110
1111 #elif defined(SEEK_HOLE) && defined(SEEK_DATA) && defined(_PC_MIN_HOLE_SIZE)
1112
1113 /*
1114 * FreeBSD and Solaris sparse interface.
1115 */
1116
1117 static int
setup_sparse(struct archive_read_disk * a,struct archive_entry * entry,int * fd)1118 setup_sparse(struct archive_read_disk *a,
1119 struct archive_entry *entry, int *fd)
1120 {
1121 int64_t size;
1122 off_t initial_off; /* FreeBSD/Solaris only, so off_t okay here */
1123 off_t off_s, off_e; /* FreeBSD/Solaris only, so off_t okay here */
1124 int exit_sts = ARCHIVE_OK;
1125
1126 if (archive_entry_filetype(entry) != AE_IFREG
1127 || archive_entry_size(entry) <= 0
1128 || archive_entry_hardlink(entry) != NULL)
1129 return (ARCHIVE_OK);
1130
1131 /* Does filesystem support the reporting of hole ? */
1132 if (*fd < 0 && a->tree != NULL) {
1133 const char *path;
1134
1135 path = archive_entry_sourcepath(entry);
1136 if (path == NULL)
1137 path = archive_entry_pathname(entry);
1138 *fd = a->open_on_current_dir(a->tree, path,
1139 O_RDONLY | O_NONBLOCK);
1140 if (*fd < 0) {
1141 archive_set_error(&a->archive, errno,
1142 "Can't open `%s'", path);
1143 return (ARCHIVE_FAILED);
1144 }
1145 }
1146
1147 if (*fd >= 0) {
1148 if (fpathconf(*fd, _PC_MIN_HOLE_SIZE) <= 0)
1149 return (ARCHIVE_OK);
1150 initial_off = lseek(*fd, 0, SEEK_CUR);
1151 if (initial_off != 0)
1152 lseek(*fd, 0, SEEK_SET);
1153 } else {
1154 const char *path;
1155
1156 path = archive_entry_sourcepath(entry);
1157 if (path == NULL)
1158 path = archive_entry_pathname(entry);
1159
1160 if (pathconf(path, _PC_MIN_HOLE_SIZE) <= 0)
1161 return (ARCHIVE_OK);
1162 *fd = open(path, O_RDONLY | O_NONBLOCK | O_CLOEXEC);
1163 if (*fd < 0) {
1164 archive_set_error(&a->archive, errno,
1165 "Can't open `%s'", path);
1166 return (ARCHIVE_FAILED);
1167 }
1168 __archive_ensure_cloexec_flag(*fd);
1169 initial_off = 0;
1170 }
1171
1172 off_s = 0;
1173 size = archive_entry_size(entry);
1174 while (off_s < size) {
1175 off_s = lseek(*fd, off_s, SEEK_DATA);
1176 if (off_s == (off_t)-1) {
1177 if (errno == ENXIO)
1178 break;/* no more hole */
1179 archive_set_error(&a->archive, errno,
1180 "lseek(SEEK_HOLE) failed");
1181 exit_sts = ARCHIVE_FAILED;
1182 goto exit_setup_sparse;
1183 }
1184 off_e = lseek(*fd, off_s, SEEK_HOLE);
1185 if (off_e == (off_t)-1) {
1186 if (errno == ENXIO) {
1187 off_e = lseek(*fd, 0, SEEK_END);
1188 if (off_e != (off_t)-1)
1189 break;/* no more data */
1190 }
1191 archive_set_error(&a->archive, errno,
1192 "lseek(SEEK_DATA) failed");
1193 exit_sts = ARCHIVE_FAILED;
1194 goto exit_setup_sparse;
1195 }
1196 if (off_s == 0 && off_e == size)
1197 break;/* This is not spase. */
1198 archive_entry_sparse_add_entry(entry, off_s,
1199 off_e - off_s);
1200 off_s = off_e;
1201 }
1202 exit_setup_sparse:
1203 lseek(*fd, initial_off, SEEK_SET);
1204 return (exit_sts);
1205 }
1206
1207 #else
1208
1209 /*
1210 * Generic (stub) sparse support.
1211 */
1212 static int
setup_sparse(struct archive_read_disk * a,struct archive_entry * entry,int * fd)1213 setup_sparse(struct archive_read_disk *a,
1214 struct archive_entry *entry, int *fd)
1215 {
1216 (void)a; /* UNUSED */
1217 (void)entry; /* UNUSED */
1218 (void)fd; /* UNUSED */
1219 return (ARCHIVE_OK);
1220 }
1221
1222 #endif
1223
1224 #endif /* !defined(_WIN32) || defined(__CYGWIN__) */
1225
1226