Import libarchive-3.0.4.
[dragonfly.git] / contrib / libarchive / libarchive / archive_read_disk_entry_from_file.c
CommitLineData
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1/*-
2 * Copyright (c) 2003-2009 Tim Kientzle
59bf7050 3 * Copyright (c) 2010-2012 Michihiro NAKAJIMA
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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"
9c82a63e 28__FBSDID("$FreeBSD: head/lib/libarchive/archive_read_disk_entry_from_file.c 201084 2009-12-28 02:14:09Z kientzle $");
8029ab02 29
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30/* This is the tree-walking code for POSIX systems. */
31#if !defined(_WIN32) || defined(__CYGWIN__)
32
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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
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43#ifdef HAVE_SYS_IOCTL_H
44#include <sys/ioctl.h>
45#endif
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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#ifdef HAVE_SYS_XATTR_H
53#include <sys/xattr.h>
54#endif
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55#ifdef HAVE_SYS_EA_H
56#include <sys/ea.h>
57#endif
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58#ifdef HAVE_ACL_LIBACL_H
59#include <acl/libacl.h>
60#endif
61#ifdef HAVE_ATTR_XATTR_H
62#include <attr/xattr.h>
63#endif
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64#ifdef HAVE_COPYFILE_H
65#include <copyfile.h>
66#endif
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67#ifdef HAVE_ERRNO_H
68#include <errno.h>
69#endif
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70#ifdef HAVE_FCNTL_H
71#include <fcntl.h>
72#endif
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73#ifdef HAVE_LIMITS_H
74#include <limits.h>
75#endif
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76#ifdef HAVE_LINUX_TYPES_H
77#include <linux/types.h>
78#endif
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79#ifdef HAVE_LINUX_FIEMAP_H
80#include <linux/fiemap.h>
81#endif
82#ifdef HAVE_LINUX_FS_H
83#include <linux/fs.h>
84#endif
85/*
86 * Some Linux distributions have both linux/ext2_fs.h and ext2fs/ext2_fs.h.
87 * As the include guards don't agree, the order of include is important.
88 */
89#ifdef HAVE_LINUX_EXT2_FS_H
90#include <linux/ext2_fs.h> /* for Linux file flags */
91#endif
92#if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__)
93#include <ext2fs/ext2_fs.h> /* Linux file flags, broken on Cygwin */
94#endif
95#ifdef HAVE_PATHS_H
96#include <paths.h>
97#endif
98#ifdef HAVE_UNISTD_H
99#include <unistd.h>
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100#endif
101
102#include "archive.h"
103#include "archive_entry.h"
104#include "archive_private.h"
105#include "archive_read_disk_private.h"
106
107/*
108 * Linux and FreeBSD plug this obvious hole in POSIX.1e in
109 * different ways.
110 */
111#if HAVE_ACL_GET_PERM
112#define ACL_GET_PERM acl_get_perm
113#elif HAVE_ACL_GET_PERM_NP
114#define ACL_GET_PERM acl_get_perm_np
115#endif
116
117static int setup_acls_posix1e(struct archive_read_disk *,
59bf7050 118 struct archive_entry *, int *fd);
c09f92d2 119static int setup_mac_metadata(struct archive_read_disk *,
59bf7050 120 struct archive_entry *, int *fd);
8029ab02 121static int setup_xattrs(struct archive_read_disk *,
59bf7050 122 struct archive_entry *, int *fd);
c09f92d2 123static int setup_sparse(struct archive_read_disk *,
59bf7050 124 struct archive_entry *, int *fd);
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125
126int
127archive_read_disk_entry_from_file(struct archive *_a,
128 struct archive_entry *entry,
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129 int fd,
130 const struct stat *st)
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131{
132 struct archive_read_disk *a = (struct archive_read_disk *)_a;
133 const char *path, *name;
134 struct stat s;
135 int initial_fd = fd;
136 int r, r1;
137
898be84c 138 archive_clear_error(_a);
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139 path = archive_entry_sourcepath(entry);
140 if (path == NULL)
141 path = archive_entry_pathname(entry);
142
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143 if (a->tree == NULL) {
144 if (st == NULL) {
8029ab02 145#if HAVE_FSTAT
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146 if (fd >= 0) {
147 if (fstat(fd, &s) != 0) {
148 archive_set_error(&a->archive, errno,
149 "Can't fstat");
150 return (ARCHIVE_FAILED);
151 }
152 } else
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153#endif
154#if HAVE_LSTAT
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155 if (!a->follow_symlinks) {
156 if (lstat(path, &s) != 0) {
157 archive_set_error(&a->archive, errno,
158 "Can't lstat %s", path);
159 return (ARCHIVE_FAILED);
160 }
161 } else
162#endif
163 if (stat(path, &s) != 0) {
9c82a63e 164 archive_set_error(&a->archive, errno,
c09f92d2 165 "Can't stat %s", path);
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166 return (ARCHIVE_FAILED);
167 }
c09f92d2 168 st = &s;
9c82a63e 169 }
c09f92d2 170 archive_entry_copy_stat(entry, st);
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171 /* Lookup uname/gname */
172 name = archive_read_disk_uname(_a, archive_entry_uid(entry));
173 if (name != NULL)
174 archive_entry_copy_uname(entry, name);
175 name = archive_read_disk_gname(_a, archive_entry_gid(entry));
176 if (name != NULL)
177 archive_entry_copy_gname(entry, name);
8029ab02 178 }
8029ab02 179
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180#ifdef HAVE_STRUCT_STAT_ST_FLAGS
181 /* On FreeBSD, we get flags for free with the stat. */
182 /* TODO: Does this belong in copy_stat()? */
183 if (st->st_flags != 0)
184 archive_entry_set_fflags(entry, st->st_flags, 0);
185#endif
186
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187#if defined(EXT2_IOC_GETFLAGS) && defined(HAVE_WORKING_EXT2_IOC_GETFLAGS)
188 /* Linux requires an extra ioctl to pull the flags. Although
189 * this is an extra step, it has a nice side-effect: We get an
190 * open file descriptor which we can use in the subsequent lookups. */
191 if ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode))) {
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192 if (fd < 0) {
193 if (a->tree != NULL)
194 fd = a->open_on_current_dir(a->tree, path,
195 O_RDONLY | O_NONBLOCK);
196 else
197 fd = open(path, O_RDONLY | O_NONBLOCK);
198 }
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199 if (fd >= 0) {
200 unsigned long stflags;
59bf7050 201 r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags);
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202 if (r == 0 && stflags != 0)
203 archive_entry_set_fflags(entry, stflags, 0);
204 }
205 }
206#endif
207
208#if defined(HAVE_READLINK) || defined(HAVE_READLINKAT)
8029ab02 209 if (S_ISLNK(st->st_mode)) {
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210 size_t linkbuffer_len = st->st_size + 1;
211 char *linkbuffer;
212 int lnklen;
213
214 linkbuffer = malloc(linkbuffer_len);
215 if (linkbuffer == NULL) {
216 archive_set_error(&a->archive, ENOMEM,
217 "Couldn't read link data");
218 return (ARCHIVE_FAILED);
219 }
59bf7050 220 if (a->tree != NULL) {
c09f92d2 221#ifdef HAVE_READLINKAT
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222 lnklen = readlinkat(a->tree_current_dir_fd(a->tree),
223 path, linkbuffer, linkbuffer_len);
224#else
225 if (a->tree_enter_working_dir(a->tree) != 0) {
226 archive_set_error(&a->archive, errno,
227 "Couldn't read link data");
228 free(linkbuffer);
229 return (ARCHIVE_FAILED);
230 }
231 lnklen = readlink(path, linkbuffer, linkbuffer_len);
c09f92d2 232#endif /* HAVE_READLINKAT */
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233 } else
234 lnklen = readlink(path, linkbuffer, linkbuffer_len);
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235 if (lnklen < 0) {
236 archive_set_error(&a->archive, errno,
237 "Couldn't read link data");
c09f92d2 238 free(linkbuffer);
9c82a63e 239 return (ARCHIVE_FAILED);
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240 }
241 linkbuffer[lnklen] = 0;
242 archive_entry_set_symlink(entry, linkbuffer);
c09f92d2 243 free(linkbuffer);
8029ab02 244 }
c09f92d2 245#endif /* HAVE_READLINK || HAVE_READLINKAT */
8029ab02 246
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247 r = setup_acls_posix1e(a, entry, &fd);
248 r1 = setup_xattrs(a, entry, &fd);
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249 if (r1 < r)
250 r = r1;
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251 if (a->enable_copyfile) {
252 r1 = setup_mac_metadata(a, entry, &fd);
253 if (r1 < r)
254 r = r1;
255 }
256 r1 = setup_sparse(a, entry, &fd);
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257 if (r1 < r)
258 r = r1;
259
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260 /* If we opened the file earlier in this function, close it. */
261 if (initial_fd != fd)
262 close(fd);
263 return (r);
264}
265
55c601bb 266#if defined(__APPLE__) && defined(HAVE_COPYFILE_H)
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267/*
268 * The Mac OS "copyfile()" API copies the extended metadata for a
269 * file into a separate file in AppleDouble format (see RFC 1740).
270 *
271 * Mac OS tar and cpio implementations store this extended
272 * metadata as a separate entry just before the regular entry
273 * with a "._" prefix added to the filename.
274 *
275 * Note that this is currently done unconditionally; the tar program has
276 * an option to discard this information before the archive is written.
277 *
278 * TODO: If there's a failure, report it and return ARCHIVE_WARN.
279 */
280static int
281setup_mac_metadata(struct archive_read_disk *a,
59bf7050 282 struct archive_entry *entry, int *fd)
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283{
284 int tempfd = -1;
285 int copyfile_flags = COPYFILE_NOFOLLOW | COPYFILE_ACL | COPYFILE_XATTR;
286 struct stat copyfile_stat;
287 int ret = ARCHIVE_OK;
288 void *buff;
289 int have_attrs;
290 const char *name, *tempdir, *tempfile = NULL;
291
59bf7050 292 (void)fd; /* UNUSED */
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293 name = archive_entry_sourcepath(entry);
294 if (name == NULL)
295 name = archive_entry_pathname(entry);
296 if (name == NULL) {
297 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
298 "Can't open file to read extended attributes: No name");
299 return (ARCHIVE_WARN);
300 }
301
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302 if (a->tree != NULL) {
303 if (a->tree_enter_working_dir(a->tree) != 0) {
304 archive_set_error(&a->archive, errno,
305 "Couldn't change dir");
306 return (ARCHIVE_FAILED);
307 }
308 }
309
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310 /* Short-circuit if there's nothing to do. */
311 have_attrs = copyfile(name, NULL, 0, copyfile_flags | COPYFILE_CHECK);
312 if (have_attrs == -1) {
313 archive_set_error(&a->archive, errno,
314 "Could not check extended attributes");
315 return (ARCHIVE_WARN);
316 }
317 if (have_attrs == 0)
318 return (ARCHIVE_OK);
319
320 tempdir = NULL;
321 if (issetugid() == 0)
322 tempdir = getenv("TMPDIR");
323 if (tempdir == NULL)
324 tempdir = _PATH_TMP;
325 tempfile = tempnam(tempdir, "tar.md.");
326
327 /* XXX I wish copyfile() could pack directly to a memory
328 * buffer; that would avoid the temp file here. For that
329 * matter, it would be nice if fcopyfile() actually worked,
330 * that would reduce the many open/close races here. */
331 if (copyfile(name, tempfile, 0, copyfile_flags | COPYFILE_PACK)) {
332 archive_set_error(&a->archive, errno,
333 "Could not pack extended attributes");
334 ret = ARCHIVE_WARN;
335 goto cleanup;
336 }
337 tempfd = open(tempfile, O_RDONLY);
338 if (tempfd < 0) {
339 archive_set_error(&a->archive, errno,
340 "Could not open extended attribute file");
341 ret = ARCHIVE_WARN;
342 goto cleanup;
343 }
344 if (fstat(tempfd, &copyfile_stat)) {
345 archive_set_error(&a->archive, errno,
346 "Could not check size of extended attributes");
347 ret = ARCHIVE_WARN;
348 goto cleanup;
349 }
350 buff = malloc(copyfile_stat.st_size);
351 if (buff == NULL) {
352 archive_set_error(&a->archive, errno,
353 "Could not allocate memory for extended attributes");
354 ret = ARCHIVE_WARN;
355 goto cleanup;
356 }
357 if (copyfile_stat.st_size != read(tempfd, buff, copyfile_stat.st_size)) {
358 archive_set_error(&a->archive, errno,
359 "Could not read extended attributes into memory");
360 ret = ARCHIVE_WARN;
361 goto cleanup;
362 }
363 archive_entry_copy_mac_metadata(entry, buff, copyfile_stat.st_size);
364
365cleanup:
366 if (tempfd >= 0)
367 close(tempfd);
368 if (tempfile != NULL)
369 unlink(tempfile);
370 return (ret);
371}
372
373#else
374
375/*
376 * Stub implementation for non-Mac systems.
377 */
378static int
379setup_mac_metadata(struct archive_read_disk *a,
59bf7050 380 struct archive_entry *entry, int *fd)
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381{
382 (void)a; /* UNUSED */
383 (void)entry; /* UNUSED */
384 (void)fd; /* UNUSED */
385 return (ARCHIVE_OK);
386}
387#endif
388
389
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390#ifdef HAVE_POSIX_ACL
391static void setup_acl_posix1e(struct archive_read_disk *a,
392 struct archive_entry *entry, acl_t acl, int archive_entry_acl_type);
393
394static int
395setup_acls_posix1e(struct archive_read_disk *a,
59bf7050 396 struct archive_entry *entry, int *fd)
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397{
398 const char *accpath;
399 acl_t acl;
400
401 accpath = archive_entry_sourcepath(entry);
402 if (accpath == NULL)
403 accpath = archive_entry_pathname(entry);
404
405 archive_entry_acl_clear(entry);
406
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407 if (*fd < 0 && a->tree != NULL &&
408 (a->follow_symlinks || archive_entry_filetype(entry) != AE_IFLNK)){
409 *fd = a->open_on_current_dir(a->tree, accpath,
410 O_RDONLY | O_NONBLOCK);
411 if (*fd < 0) {
412 archive_set_error(&a->archive, errno,
413 "Couldn't access %s", accpath);
414 return (ARCHIVE_FAILED);
415 }
416 }
417
8029ab02 418 /* Retrieve access ACL from file. */
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419 if (*fd >= 0)
420 acl = acl_get_fd(*fd);
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421#if HAVE_ACL_GET_LINK_NP
422 else if (!a->follow_symlinks)
423 acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS);
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424#else
425 else if ((!a->follow_symlinks)
426 && (archive_entry_filetype(entry) == AE_IFLNK))
427 /* We can't get the ACL of a symlink, so we assume it can't
428 have one. */
429 acl = NULL;
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430#endif
431 else
432 acl = acl_get_file(accpath, ACL_TYPE_ACCESS);
433 if (acl != NULL) {
434 setup_acl_posix1e(a, entry, acl,
435 ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
436 acl_free(acl);
437 }
438
439 /* Only directories can have default ACLs. */
440 if (S_ISDIR(archive_entry_mode(entry))) {
441 acl = acl_get_file(accpath, ACL_TYPE_DEFAULT);
442 if (acl != NULL) {
443 setup_acl_posix1e(a, entry, acl,
444 ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
445 acl_free(acl);
446 }
447 }
448 return (ARCHIVE_OK);
449}
450
451/*
452 * Translate POSIX.1e ACL into libarchive internal structure.
453 */
454static void
455setup_acl_posix1e(struct archive_read_disk *a,
456 struct archive_entry *entry, acl_t acl, int archive_entry_acl_type)
457{
458 acl_tag_t acl_tag;
459 acl_entry_t acl_entry;
460 acl_permset_t acl_permset;
461 int s, ae_id, ae_tag, ae_perm;
462 const char *ae_name;
463
464 s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
465 while (s == 1) {
466 ae_id = -1;
467 ae_name = NULL;
468
469 acl_get_tag_type(acl_entry, &acl_tag);
470 if (acl_tag == ACL_USER) {
471 ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry);
472 ae_name = archive_read_disk_uname(&a->archive, ae_id);
473 ae_tag = ARCHIVE_ENTRY_ACL_USER;
474 } else if (acl_tag == ACL_GROUP) {
475 ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry);
476 ae_name = archive_read_disk_gname(&a->archive, ae_id);
477 ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
478 } else if (acl_tag == ACL_MASK) {
479 ae_tag = ARCHIVE_ENTRY_ACL_MASK;
480 } else if (acl_tag == ACL_USER_OBJ) {
481 ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
482 } else if (acl_tag == ACL_GROUP_OBJ) {
483 ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
484 } else if (acl_tag == ACL_OTHER) {
485 ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
486 } else {
487 /* Skip types that libarchive can't support. */
488 continue;
489 }
490
491 acl_get_permset(acl_entry, &acl_permset);
492 ae_perm = 0;
493 /*
494 * acl_get_perm() is spelled differently on different
495 * platforms; see above.
496 */
497 if (ACL_GET_PERM(acl_permset, ACL_EXECUTE))
498 ae_perm |= ARCHIVE_ENTRY_ACL_EXECUTE;
499 if (ACL_GET_PERM(acl_permset, ACL_READ))
500 ae_perm |= ARCHIVE_ENTRY_ACL_READ;
501 if (ACL_GET_PERM(acl_permset, ACL_WRITE))
502 ae_perm |= ARCHIVE_ENTRY_ACL_WRITE;
503
504 archive_entry_acl_add_entry(entry,
505 archive_entry_acl_type, ae_perm, ae_tag,
506 ae_id, ae_name);
507
508 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
509 }
510}
511#else
512static int
513setup_acls_posix1e(struct archive_read_disk *a,
59bf7050 514 struct archive_entry *entry, int *fd)
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515{
516 (void)a; /* UNUSED */
517 (void)entry; /* UNUSED */
518 (void)fd; /* UNUSED */
519 return (ARCHIVE_OK);
520}
521#endif
522
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523#if (HAVE_FGETXATTR && HAVE_FLISTXATTR && HAVE_LISTXATTR && \
524 HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR) || \
525 (HAVE_FGETEA && HAVE_FLISTEA && HAVE_LISTEA)
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526
527/*
c09f92d2 528 * Linux and AIX extended attribute support.
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529 *
530 * TODO: By using a stack-allocated buffer for the first
531 * call to getxattr(), we might be able to avoid the second
532 * call entirely. We only need the second call if the
533 * stack-allocated buffer is too small. But a modest buffer
534 * of 1024 bytes or so will often be big enough. Same applies
535 * to listxattr().
536 */
537
538
539static int
540setup_xattr(struct archive_read_disk *a,
541 struct archive_entry *entry, const char *name, int fd)
542{
543 ssize_t size;
544 void *value = NULL;
545 const char *accpath;
546
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547 accpath = archive_entry_sourcepath(entry);
548 if (accpath == NULL)
549 accpath = archive_entry_pathname(entry);
550
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551#if HAVE_FGETXATTR
552 if (fd >= 0)
553 size = fgetxattr(fd, name, NULL, 0);
554 else if (!a->follow_symlinks)
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555 size = lgetxattr(accpath, name, NULL, 0);
556 else
557 size = getxattr(accpath, name, NULL, 0);
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558#elif HAVE_FGETEA
559 if (fd >= 0)
560 size = fgetea(fd, name, NULL, 0);
561 else if (!a->follow_symlinks)
562 size = lgetea(accpath, name, NULL, 0);
563 else
564 size = getea(accpath, name, NULL, 0);
565#endif
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566
567 if (size == -1) {
568 archive_set_error(&a->archive, errno,
569 "Couldn't query extended attribute");
570 return (ARCHIVE_WARN);
571 }
572
573 if (size > 0 && (value = malloc(size)) == NULL) {
574 archive_set_error(&a->archive, errno, "Out of memory");
575 return (ARCHIVE_FATAL);
576 }
577
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578#if HAVE_FGETXATTR
579 if (fd >= 0)
580 size = fgetxattr(fd, name, value, size);
581 else if (!a->follow_symlinks)
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582 size = lgetxattr(accpath, name, value, size);
583 else
584 size = getxattr(accpath, name, value, size);
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585#elif HAVE_FGETEA
586 if (fd >= 0)
587 size = fgetea(fd, name, value, size);
588 else if (!a->follow_symlinks)
589 size = lgetea(accpath, name, value, size);
590 else
591 size = getea(accpath, name, value, size);
592#endif
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593
594 if (size == -1) {
595 archive_set_error(&a->archive, errno,
596 "Couldn't read extended attribute");
597 return (ARCHIVE_WARN);
598 }
599
600 archive_entry_xattr_add_entry(entry, name, value, size);
601
602 free(value);
603 return (ARCHIVE_OK);
604}
605
606static int
607setup_xattrs(struct archive_read_disk *a,
59bf7050 608 struct archive_entry *entry, int *fd)
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609{
610 char *list, *p;
611 const char *path;
612 ssize_t list_size;
613
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614 path = archive_entry_sourcepath(entry);
615 if (path == NULL)
616 path = archive_entry_pathname(entry);
617
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618 if (*fd < 0 && a->tree != NULL) {
619 if (a->follow_symlinks ||
620 archive_entry_filetype(entry) != AE_IFLNK)
621 *fd = a->open_on_current_dir(a->tree, path,
622 O_RDONLY | O_NONBLOCK);
623 if (*fd < 0) {
624 if (a->tree_enter_working_dir(a->tree) != 0) {
625 archive_set_error(&a->archive, errno,
626 "Couldn't access %s", path);
627 return (ARCHIVE_FAILED);
628 }
629 }
630 }
631
c09f92d2 632#if HAVE_FLISTXATTR
59bf7050
PA
633 if (*fd >= 0)
634 list_size = flistxattr(*fd, NULL, 0);
c09f92d2 635 else if (!a->follow_symlinks)
8029ab02
PA
636 list_size = llistxattr(path, NULL, 0);
637 else
638 list_size = listxattr(path, NULL, 0);
c09f92d2 639#elif HAVE_FLISTEA
59bf7050
PA
640 if (*fd >= 0)
641 list_size = flistea(*fd, NULL, 0);
c09f92d2
PA
642 else if (!a->follow_symlinks)
643 list_size = llistea(path, NULL, 0);
644 else
645 list_size = listea(path, NULL, 0);
646#endif
8029ab02
PA
647
648 if (list_size == -1) {
c09f92d2 649 if (errno == ENOTSUP || errno == ENOSYS)
8029ab02
PA
650 return (ARCHIVE_OK);
651 archive_set_error(&a->archive, errno,
652 "Couldn't list extended attributes");
653 return (ARCHIVE_WARN);
654 }
655
656 if (list_size == 0)
657 return (ARCHIVE_OK);
658
659 if ((list = malloc(list_size)) == NULL) {
660 archive_set_error(&a->archive, errno, "Out of memory");
661 return (ARCHIVE_FATAL);
662 }
663
c09f92d2 664#if HAVE_FLISTXATTR
59bf7050
PA
665 if (*fd >= 0)
666 list_size = flistxattr(*fd, list, list_size);
c09f92d2 667 else if (!a->follow_symlinks)
8029ab02
PA
668 list_size = llistxattr(path, list, list_size);
669 else
670 list_size = listxattr(path, list, list_size);
c09f92d2 671#elif HAVE_FLISTEA
59bf7050
PA
672 if (*fd >= 0)
673 list_size = flistea(*fd, list, list_size);
c09f92d2
PA
674 else if (!a->follow_symlinks)
675 list_size = llistea(path, list, list_size);
676 else
677 list_size = listea(path, list, list_size);
678#endif
8029ab02
PA
679
680 if (list_size == -1) {
681 archive_set_error(&a->archive, errno,
682 "Couldn't retrieve extended attributes");
683 free(list);
684 return (ARCHIVE_WARN);
685 }
686
687 for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
688 if (strncmp(p, "system.", 7) == 0 ||
689 strncmp(p, "xfsroot.", 8) == 0)
690 continue;
59bf7050 691 setup_xattr(a, entry, p, *fd);
8029ab02
PA
692 }
693
694 free(list);
695 return (ARCHIVE_OK);
696}
697
9c82a63e
PA
698#elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE && \
699 HAVE_DECL_EXTATTR_NAMESPACE_USER
8029ab02
PA
700
701/*
702 * FreeBSD extattr interface.
703 */
704
705/* TODO: Implement this. Follow the Linux model above, but
706 * with FreeBSD-specific system calls, of course. Be careful
707 * to not include the system extattrs that hold ACLs; we handle
708 * those separately.
709 */
9c82a63e 710static int
8029ab02
PA
711setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
712 int namespace, const char *name, const char *fullname, int fd);
713
9c82a63e 714static int
8029ab02
PA
715setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
716 int namespace, const char *name, const char *fullname, int fd)
717{
718 ssize_t size;
719 void *value = NULL;
720 const char *accpath;
721
8029ab02
PA
722 accpath = archive_entry_sourcepath(entry);
723 if (accpath == NULL)
724 accpath = archive_entry_pathname(entry);
725
c09f92d2
PA
726 if (fd >= 0)
727 size = extattr_get_fd(fd, namespace, name, NULL, 0);
728 else if (!a->follow_symlinks)
8029ab02
PA
729 size = extattr_get_link(accpath, namespace, name, NULL, 0);
730 else
731 size = extattr_get_file(accpath, namespace, name, NULL, 0);
732
733 if (size == -1) {
734 archive_set_error(&a->archive, errno,
735 "Couldn't query extended attribute");
736 return (ARCHIVE_WARN);
737 }
738
739 if (size > 0 && (value = malloc(size)) == NULL) {
740 archive_set_error(&a->archive, errno, "Out of memory");
741 return (ARCHIVE_FATAL);
742 }
743
c09f92d2
PA
744 if (fd >= 0)
745 size = extattr_get_fd(fd, namespace, name, value, size);
746 else if (!a->follow_symlinks)
8029ab02
PA
747 size = extattr_get_link(accpath, namespace, name, value, size);
748 else
749 size = extattr_get_file(accpath, namespace, name, value, size);
750
751 if (size == -1) {
59bf7050 752 free(value);
8029ab02
PA
753 archive_set_error(&a->archive, errno,
754 "Couldn't read extended attribute");
755 return (ARCHIVE_WARN);
756 }
757
758 archive_entry_xattr_add_entry(entry, fullname, value, size);
759
760 free(value);
761 return (ARCHIVE_OK);
762}
763
764static int
765setup_xattrs(struct archive_read_disk *a,
59bf7050 766 struct archive_entry *entry, int *fd)
8029ab02
PA
767{
768 char buff[512];
769 char *list, *p;
770 ssize_t list_size;
771 const char *path;
772 int namespace = EXTATTR_NAMESPACE_USER;
773
774 path = archive_entry_sourcepath(entry);
775 if (path == NULL)
776 path = archive_entry_pathname(entry);
777
59bf7050
PA
778 if (*fd < 0 && a->tree != NULL) {
779 if (a->follow_symlinks ||
780 archive_entry_filetype(entry) != AE_IFLNK)
781 *fd = a->open_on_current_dir(a->tree, path,
782 O_RDONLY | O_NONBLOCK);
783 if (*fd < 0) {
784 if (a->tree_enter_working_dir(a->tree) != 0) {
785 archive_set_error(&a->archive, errno,
786 "Couldn't access %s", path);
787 return (ARCHIVE_FAILED);
788 }
789 }
790 }
791
792 if (*fd >= 0)
793 list_size = extattr_list_fd(*fd, namespace, NULL, 0);
c09f92d2 794 else if (!a->follow_symlinks)
8029ab02
PA
795 list_size = extattr_list_link(path, namespace, NULL, 0);
796 else
797 list_size = extattr_list_file(path, namespace, NULL, 0);
798
799 if (list_size == -1 && errno == EOPNOTSUPP)
800 return (ARCHIVE_OK);
801 if (list_size == -1) {
802 archive_set_error(&a->archive, errno,
803 "Couldn't list extended attributes");
804 return (ARCHIVE_WARN);
805 }
806
807 if (list_size == 0)
808 return (ARCHIVE_OK);
809
810 if ((list = malloc(list_size)) == NULL) {
811 archive_set_error(&a->archive, errno, "Out of memory");
812 return (ARCHIVE_FATAL);
813 }
814
59bf7050
PA
815 if (*fd >= 0)
816 list_size = extattr_list_fd(*fd, namespace, list, list_size);
c09f92d2 817 else if (!a->follow_symlinks)
8029ab02
PA
818 list_size = extattr_list_link(path, namespace, list, list_size);
819 else
820 list_size = extattr_list_file(path, namespace, list, list_size);
821
822 if (list_size == -1) {
823 archive_set_error(&a->archive, errno,
824 "Couldn't retrieve extended attributes");
825 free(list);
826 return (ARCHIVE_WARN);
827 }
828
829 p = list;
830 while ((p - list) < list_size) {
831 size_t len = 255 & (int)*p;
832 char *name;
833
834 strcpy(buff, "user.");
835 name = buff + strlen(buff);
836 memcpy(name, p + 1, len);
837 name[len] = '\0';
59bf7050 838 setup_xattr(a, entry, namespace, name, buff, *fd);
8029ab02
PA
839 p += 1 + len;
840 }
841
842 free(list);
843 return (ARCHIVE_OK);
844}
845
846#else
847
848/*
849 * Generic (stub) extended attribute support.
850 */
851static int
852setup_xattrs(struct archive_read_disk *a,
59bf7050 853 struct archive_entry *entry, int *fd)
8029ab02
PA
854{
855 (void)a; /* UNUSED */
856 (void)entry; /* UNUSED */
857 (void)fd; /* UNUSED */
858 return (ARCHIVE_OK);
859}
860
861#endif
c09f92d2
PA
862
863#if defined(HAVE_LINUX_FIEMAP_H)
864
865/*
866 * Linux sparse interface.
867 *
868 * The FIEMAP ioctl returns an "extent" for each physical allocation
869 * on disk. We need to process those to generate a more compact list
870 * of logical file blocks. We also need to be very careful to use
871 * FIEMAP_FLAG_SYNC here, since there are reports that Linux sometimes
872 * does not report allocations for newly-written data that hasn't
873 * been synced to disk.
874 *
875 * It's important to return a minimal sparse file list because we want
876 * to not trigger sparse file extensions if we don't have to, since
877 * not all readers support them.
878 */
879
880static int
881setup_sparse(struct archive_read_disk *a,
59bf7050 882 struct archive_entry *entry, int *fd)
c09f92d2
PA
883{
884 char buff[4096];
885 struct fiemap *fm;
886 struct fiemap_extent *fe;
887 int64_t size;
888 int count, do_fiemap;
c09f92d2
PA
889 int exit_sts = ARCHIVE_OK;
890
891 if (archive_entry_filetype(entry) != AE_IFREG
892 || archive_entry_size(entry) <= 0
893 || archive_entry_hardlink(entry) != NULL)
894 return (ARCHIVE_OK);
895
59bf7050 896 if (*fd < 0) {
c09f92d2
PA
897 const char *path;
898
899 path = archive_entry_sourcepath(entry);
900 if (path == NULL)
901 path = archive_entry_pathname(entry);
59bf7050
PA
902 if (a->tree != NULL)
903 *fd = a->open_on_current_dir(a->tree, path,
904 O_RDONLY | O_NONBLOCK);
905 else
906 *fd = open(path, O_RDONLY | O_NONBLOCK);
907 if (*fd < 0) {
c09f92d2
PA
908 archive_set_error(&a->archive, errno,
909 "Can't open `%s'", path);
910 return (ARCHIVE_FAILED);
911 }
912 }
913
914 count = (sizeof(buff) - sizeof(*fm))/sizeof(*fe);
915 fm = (struct fiemap *)buff;
916 fm->fm_start = 0;
917 fm->fm_length = ~0ULL;;
918 fm->fm_flags = FIEMAP_FLAG_SYNC;
919 fm->fm_extent_count = count;
920 do_fiemap = 1;
921 size = archive_entry_size(entry);
922 for (;;) {
923 int i, r;
924
59bf7050 925 r = ioctl(*fd, FS_IOC_FIEMAP, fm);
c09f92d2 926 if (r < 0) {
59bf7050
PA
927 /* When something error happens, it is better we
928 * should return ARCHIVE_OK because an earlier
929 * version(<2.6.28) cannot perfom FS_IOC_FIEMAP. */
c09f92d2
PA
930 goto exit_setup_sparse;
931 }
932 if (fm->fm_mapped_extents == 0)
933 break;
934 fe = fm->fm_extents;
59bf7050 935 for (i = 0; i < (int)fm->fm_mapped_extents; i++, fe++) {
c09f92d2
PA
936 if (!(fe->fe_flags & FIEMAP_EXTENT_UNWRITTEN)) {
937 /* The fe_length of the last block does not
938 * adjust itself to its size files. */
939 int64_t length = fe->fe_length;
59bf7050 940 if (fe->fe_logical + length > (uint64_t)size)
c09f92d2
PA
941 length -= fe->fe_logical + length - size;
942 if (fe->fe_logical == 0 && length == size) {
943 /* This is not sparse. */
944 do_fiemap = 0;
945 break;
946 }
947 if (length > 0)
948 archive_entry_sparse_add_entry(entry,
949 fe->fe_logical, length);
950 }
951 if (fe->fe_flags & FIEMAP_EXTENT_LAST)
952 do_fiemap = 0;
953 }
954 if (do_fiemap) {
955 fe = fm->fm_extents + fm->fm_mapped_extents -1;
956 fm->fm_start = fe->fe_logical + fe->fe_length;
957 } else
958 break;
959 }
960exit_setup_sparse:
c09f92d2
PA
961 return (exit_sts);
962}
963
964#elif defined(SEEK_HOLE) && defined(SEEK_DATA) && defined(_PC_MIN_HOLE_SIZE)
965
966/*
967 * FreeBSD and Solaris sparse interface.
968 */
969
970static int
971setup_sparse(struct archive_read_disk *a,
59bf7050 972 struct archive_entry *entry, int *fd)
c09f92d2
PA
973{
974 int64_t size;
c09f92d2
PA
975 off_t initial_off; /* FreeBSD/Solaris only, so off_t okay here */
976 off_t off_s, off_e; /* FreeBSD/Solaris only, so off_t okay here */
977 int exit_sts = ARCHIVE_OK;
978
979 if (archive_entry_filetype(entry) != AE_IFREG
980 || archive_entry_size(entry) <= 0
981 || archive_entry_hardlink(entry) != NULL)
982 return (ARCHIVE_OK);
983
984 /* Does filesystem support the reporting of hole ? */
59bf7050
PA
985 if (*fd < 0 && a->tree != NULL) {
986 const char *path;
987
988 path = archive_entry_sourcepath(entry);
989 if (path == NULL)
990 path = archive_entry_pathname(entry);
991 *fd = a->open_on_current_dir(a->tree, path,
992 O_RDONLY | O_NONBLOCK);
993 if (*fd < 0) {
994 archive_set_error(&a->archive, errno,
995 "Can't open `%s'", path);
996 return (ARCHIVE_FAILED);
997 }
998 }
999
1000 if (*fd >= 0) {
1001 if (fpathconf(*fd, _PC_MIN_HOLE_SIZE) <= 0)
c09f92d2 1002 return (ARCHIVE_OK);
59bf7050 1003 initial_off = lseek(*fd, 0, SEEK_CUR);
c09f92d2 1004 if (initial_off != 0)
59bf7050 1005 lseek(*fd, 0, SEEK_SET);
c09f92d2
PA
1006 } else {
1007 const char *path;
1008
1009 path = archive_entry_sourcepath(entry);
1010 if (path == NULL)
1011 path = archive_entry_pathname(entry);
59bf7050 1012
c09f92d2
PA
1013 if (pathconf(path, _PC_MIN_HOLE_SIZE) <= 0)
1014 return (ARCHIVE_OK);
59bf7050
PA
1015 *fd = open(path, O_RDONLY | O_NONBLOCK);
1016 if (*fd < 0) {
c09f92d2
PA
1017 archive_set_error(&a->archive, errno,
1018 "Can't open `%s'", path);
1019 return (ARCHIVE_FAILED);
1020 }
1021 initial_off = 0;
1022 }
1023
1024 off_s = 0;
1025 size = archive_entry_size(entry);
1026 while (off_s < size) {
59bf7050 1027 off_s = lseek(*fd, off_s, SEEK_DATA);
c09f92d2
PA
1028 if (off_s == (off_t)-1) {
1029 if (errno == ENXIO)
1030 break;/* no more hole */
1031 archive_set_error(&a->archive, errno,
1032 "lseek(SEEK_HOLE) failed");
1033 exit_sts = ARCHIVE_FAILED;
1034 goto exit_setup_sparse;
1035 }
59bf7050
PA
1036 off_e = lseek(*fd, off_s, SEEK_HOLE);
1037 if (off_e == (off_t)-1) {
c09f92d2 1038 if (errno == ENXIO) {
59bf7050 1039 off_e = lseek(*fd, 0, SEEK_END);
c09f92d2
PA
1040 if (off_e != (off_t)-1)
1041 break;/* no more data */
1042 }
1043 archive_set_error(&a->archive, errno,
1044 "lseek(SEEK_DATA) failed");
1045 exit_sts = ARCHIVE_FAILED;
1046 goto exit_setup_sparse;
1047 }
1048 if (off_s == 0 && off_e == size)
1049 break;/* This is not spase. */
1050 archive_entry_sparse_add_entry(entry, off_s,
1051 off_e - off_s);
1052 off_s = off_e;
1053 }
1054exit_setup_sparse:
59bf7050 1055 lseek(*fd, initial_off, SEEK_SET);
c09f92d2
PA
1056 return (exit_sts);
1057}
1058
1059#else
1060
1061/*
1062 * Generic (stub) sparse support.
1063 */
1064static int
1065setup_sparse(struct archive_read_disk *a,
59bf7050 1066 struct archive_entry *entry, int *fd)
c09f92d2
PA
1067{
1068 (void)a; /* UNUSED */
1069 (void)entry; /* UNUSED */
1070 (void)fd; /* UNUSED */
1071 return (ARCHIVE_OK);
1072}
1073
1074#endif
1075
1076#endif /* !defined(_WIN32) || defined(__CYGWIN__) */
1077