2 * Copyright (c) 2003-2009 Tim Kientzle
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include "archive_platform.h"
27 __FBSDID("$FreeBSD$");
29 #ifdef HAVE_SYS_TYPES_H
30 /* Mac OSX requires sys/types.h before sys/acl.h. */
31 #include <sys/types.h>
36 #ifdef HAVE_SYS_EXTATTR_H
37 #include <sys/extattr.h>
39 #ifdef HAVE_SYS_PARAM_H
40 #include <sys/param.h>
42 #ifdef HAVE_SYS_STAT_H
45 #ifdef HAVE_SYS_XATTR_H
46 #include <sys/xattr.h>
48 #ifdef HAVE_ACL_LIBACL_H
49 #include <acl/libacl.h>
51 #ifdef HAVE_ATTR_XATTR_H
52 #include <attr/xattr.h>
65 #include "archive_entry.h"
66 #include "archive_private.h"
67 #include "archive_read_disk_private.h"
70 * Linux and FreeBSD plug this obvious hole in POSIX.1e in
74 #define ACL_GET_PERM acl_get_perm
75 #elif HAVE_ACL_GET_PERM_NP
76 #define ACL_GET_PERM acl_get_perm_np
79 static int setup_acls_posix1e(struct archive_read_disk *,
80 struct archive_entry *, int fd);
81 static int setup_xattrs(struct archive_read_disk *,
82 struct archive_entry *, int fd);
85 archive_read_disk_entry_from_file(struct archive *_a,
86 struct archive_entry *entry,
87 int fd, const struct stat *st)
89 struct archive_read_disk *a = (struct archive_read_disk *)_a;
90 const char *path, *name;
95 path = archive_entry_sourcepath(entry);
97 path = archive_entry_pathname(entry);
99 #ifdef EXT2_IOC_GETFLAGS
100 /* Linux requires an extra ioctl to pull the flags. Although
101 * this is an extra step, it has a nice side-effect: We get an
102 * open file descriptor which we can use in the subsequent lookups. */
103 if ((S_ISREG(st->st_mode) || S_ISDIR(st->st_mode))) {
105 fd = open(pathname, O_RDONLY | O_NONBLOCK);
107 unsigned long stflags;
108 int r = ioctl(fd, EXT2_IOC_GETFLAGS, &stflags);
109 if (r == 0 && stflags != 0)
110 archive_entry_set_fflags(entry, stflags, 0);
118 if (fstat(fd, &s) != 0)
119 return (ARCHIVE_FATAL);
123 if (!a->follow_symlinks) {
124 if (lstat(path, &s) != 0)
125 return (ARCHIVE_FATAL);
128 if (stat(path, &s) != 0)
129 return (ARCHIVE_FATAL);
132 archive_entry_copy_stat(entry, st);
134 /* Lookup uname/gname */
135 name = archive_read_disk_uname(_a, archive_entry_uid(entry));
137 archive_entry_copy_uname(entry, name);
138 name = archive_read_disk_gname(_a, archive_entry_gid(entry));
140 archive_entry_copy_gname(entry, name);
142 #ifdef HAVE_STRUCT_STAT_ST_FLAGS
143 /* On FreeBSD, we get flags for free with the stat. */
144 /* TODO: Does this belong in copy_stat()? */
145 if (st->st_flags != 0)
146 archive_entry_set_fflags(entry, st->st_flags, 0);
150 if (S_ISLNK(st->st_mode)) {
151 char linkbuffer[PATH_MAX + 1];
152 int lnklen = readlink(path, linkbuffer, PATH_MAX);
154 archive_set_error(&a->archive, errno,
155 "Couldn't read link data");
156 return (ARCHIVE_WARN);
158 linkbuffer[lnklen] = 0;
159 archive_entry_set_symlink(entry, linkbuffer);
163 r = setup_acls_posix1e(a, entry, fd);
164 r1 = setup_xattrs(a, entry, fd);
167 /* If we opened the file earlier in this function, close it. */
168 if (initial_fd != fd)
173 #ifdef HAVE_POSIX_ACL
174 static void setup_acl_posix1e(struct archive_read_disk *a,
175 struct archive_entry *entry, acl_t acl, int archive_entry_acl_type);
178 setup_acls_posix1e(struct archive_read_disk *a,
179 struct archive_entry *entry, int fd)
184 accpath = archive_entry_sourcepath(entry);
186 accpath = archive_entry_pathname(entry);
188 archive_entry_acl_clear(entry);
190 /* Retrieve access ACL from file. */
192 acl = acl_get_fd(fd);
193 #if HAVE_ACL_GET_LINK_NP
194 else if (!a->follow_symlinks)
195 acl = acl_get_link_np(accpath, ACL_TYPE_ACCESS);
198 acl = acl_get_file(accpath, ACL_TYPE_ACCESS);
200 setup_acl_posix1e(a, entry, acl,
201 ARCHIVE_ENTRY_ACL_TYPE_ACCESS);
205 /* Only directories can have default ACLs. */
206 if (S_ISDIR(archive_entry_mode(entry))) {
207 acl = acl_get_file(accpath, ACL_TYPE_DEFAULT);
209 setup_acl_posix1e(a, entry, acl,
210 ARCHIVE_ENTRY_ACL_TYPE_DEFAULT);
218 * Translate POSIX.1e ACL into libarchive internal structure.
221 setup_acl_posix1e(struct archive_read_disk *a,
222 struct archive_entry *entry, acl_t acl, int archive_entry_acl_type)
225 acl_entry_t acl_entry;
226 acl_permset_t acl_permset;
227 int s, ae_id, ae_tag, ae_perm;
230 s = acl_get_entry(acl, ACL_FIRST_ENTRY, &acl_entry);
235 acl_get_tag_type(acl_entry, &acl_tag);
236 if (acl_tag == ACL_USER) {
237 ae_id = (int)*(uid_t *)acl_get_qualifier(acl_entry);
238 ae_name = archive_read_disk_uname(&a->archive, ae_id);
239 ae_tag = ARCHIVE_ENTRY_ACL_USER;
240 } else if (acl_tag == ACL_GROUP) {
241 ae_id = (int)*(gid_t *)acl_get_qualifier(acl_entry);
242 ae_name = archive_read_disk_gname(&a->archive, ae_id);
243 ae_tag = ARCHIVE_ENTRY_ACL_GROUP;
244 } else if (acl_tag == ACL_MASK) {
245 ae_tag = ARCHIVE_ENTRY_ACL_MASK;
246 } else if (acl_tag == ACL_USER_OBJ) {
247 ae_tag = ARCHIVE_ENTRY_ACL_USER_OBJ;
248 } else if (acl_tag == ACL_GROUP_OBJ) {
249 ae_tag = ARCHIVE_ENTRY_ACL_GROUP_OBJ;
250 } else if (acl_tag == ACL_OTHER) {
251 ae_tag = ARCHIVE_ENTRY_ACL_OTHER;
253 /* Skip types that libarchive can't support. */
257 acl_get_permset(acl_entry, &acl_permset);
260 * acl_get_perm() is spelled differently on different
261 * platforms; see above.
263 if (ACL_GET_PERM(acl_permset, ACL_EXECUTE))
264 ae_perm |= ARCHIVE_ENTRY_ACL_EXECUTE;
265 if (ACL_GET_PERM(acl_permset, ACL_READ))
266 ae_perm |= ARCHIVE_ENTRY_ACL_READ;
267 if (ACL_GET_PERM(acl_permset, ACL_WRITE))
268 ae_perm |= ARCHIVE_ENTRY_ACL_WRITE;
270 archive_entry_acl_add_entry(entry,
271 archive_entry_acl_type, ae_perm, ae_tag,
274 s = acl_get_entry(acl, ACL_NEXT_ENTRY, &acl_entry);
279 setup_acls_posix1e(struct archive_read_disk *a,
280 struct archive_entry *entry, int fd)
282 (void)a; /* UNUSED */
283 (void)entry; /* UNUSED */
284 (void)fd; /* UNUSED */
289 #if HAVE_LISTXATTR && HAVE_LLISTXATTR && HAVE_GETXATTR && HAVE_LGETXATTR
292 * Linux extended attribute support.
294 * TODO: By using a stack-allocated buffer for the first
295 * call to getxattr(), we might be able to avoid the second
296 * call entirely. We only need the second call if the
297 * stack-allocated buffer is too small. But a modest buffer
298 * of 1024 bytes or so will often be big enough. Same applies
304 setup_xattr(struct archive_read_disk *a,
305 struct archive_entry *entry, const char *name, int fd)
311 (void)fd; /* UNUSED */
313 accpath = archive_entry_sourcepath(entry);
315 accpath = archive_entry_pathname(entry);
317 if (!a->follow_symlinks)
318 size = lgetxattr(accpath, name, NULL, 0);
320 size = getxattr(accpath, name, NULL, 0);
323 archive_set_error(&a->archive, errno,
324 "Couldn't query extended attribute");
325 return (ARCHIVE_WARN);
328 if (size > 0 && (value = malloc(size)) == NULL) {
329 archive_set_error(&a->archive, errno, "Out of memory");
330 return (ARCHIVE_FATAL);
333 if (!a->follow_symlinks)
334 size = lgetxattr(accpath, name, value, size);
336 size = getxattr(accpath, name, value, size);
339 archive_set_error(&a->archive, errno,
340 "Couldn't read extended attribute");
341 return (ARCHIVE_WARN);
344 archive_entry_xattr_add_entry(entry, name, value, size);
351 setup_xattrs(struct archive_read_disk *a,
352 struct archive_entry *entry, int fd)
359 path = archive_entry_sourcepath(entry);
361 path = archive_entry_pathname(entry);
363 if (!a->follow_symlinks)
364 list_size = llistxattr(path, NULL, 0);
366 list_size = listxattr(path, NULL, 0);
368 if (list_size == -1) {
369 if (errno == ENOTSUP)
371 archive_set_error(&a->archive, errno,
372 "Couldn't list extended attributes");
373 return (ARCHIVE_WARN);
379 if ((list = malloc(list_size)) == NULL) {
380 archive_set_error(&a->archive, errno, "Out of memory");
381 return (ARCHIVE_FATAL);
384 if (!a->follow_symlinks)
385 list_size = llistxattr(path, list, list_size);
387 list_size = listxattr(path, list, list_size);
389 if (list_size == -1) {
390 archive_set_error(&a->archive, errno,
391 "Couldn't retrieve extended attributes");
393 return (ARCHIVE_WARN);
396 for (p = list; (p - list) < list_size; p += strlen(p) + 1) {
397 if (strncmp(p, "system.", 7) == 0 ||
398 strncmp(p, "xfsroot.", 8) == 0)
400 setup_xattr(a, entry, p, fd);
407 #elif HAVE_EXTATTR_GET_FILE && HAVE_EXTATTR_LIST_FILE
410 * FreeBSD extattr interface.
413 /* TODO: Implement this. Follow the Linux model above, but
414 * with FreeBSD-specific system calls, of course. Be careful
415 * to not include the system extattrs that hold ACLs; we handle
419 setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
420 int namespace, const char *name, const char *fullname, int fd);
423 setup_xattr(struct archive_read_disk *a, struct archive_entry *entry,
424 int namespace, const char *name, const char *fullname, int fd)
430 (void)fd; /* UNUSED */
432 accpath = archive_entry_sourcepath(entry);
434 accpath = archive_entry_pathname(entry);
436 if (!a->follow_symlinks)
437 size = extattr_get_link(accpath, namespace, name, NULL, 0);
439 size = extattr_get_file(accpath, namespace, name, NULL, 0);
442 archive_set_error(&a->archive, errno,
443 "Couldn't query extended attribute");
444 return (ARCHIVE_WARN);
447 if (size > 0 && (value = malloc(size)) == NULL) {
448 archive_set_error(&a->archive, errno, "Out of memory");
449 return (ARCHIVE_FATAL);
452 if (!a->follow_symlinks)
453 size = extattr_get_link(accpath, namespace, name, value, size);
455 size = extattr_get_file(accpath, namespace, name, value, size);
458 archive_set_error(&a->archive, errno,
459 "Couldn't read extended attribute");
460 return (ARCHIVE_WARN);
463 archive_entry_xattr_add_entry(entry, fullname, value, size);
470 setup_xattrs(struct archive_read_disk *a,
471 struct archive_entry *entry, int fd)
477 int namespace = EXTATTR_NAMESPACE_USER;
479 path = archive_entry_sourcepath(entry);
481 path = archive_entry_pathname(entry);
483 if (!a->follow_symlinks)
484 list_size = extattr_list_link(path, namespace, NULL, 0);
486 list_size = extattr_list_file(path, namespace, NULL, 0);
488 if (list_size == -1 && errno == EOPNOTSUPP)
490 if (list_size == -1) {
491 archive_set_error(&a->archive, errno,
492 "Couldn't list extended attributes");
493 return (ARCHIVE_WARN);
499 if ((list = malloc(list_size)) == NULL) {
500 archive_set_error(&a->archive, errno, "Out of memory");
501 return (ARCHIVE_FATAL);
504 if (!a->follow_symlinks)
505 list_size = extattr_list_link(path, namespace, list, list_size);
507 list_size = extattr_list_file(path, namespace, list, list_size);
509 if (list_size == -1) {
510 archive_set_error(&a->archive, errno,
511 "Couldn't retrieve extended attributes");
513 return (ARCHIVE_WARN);
517 while ((p - list) < list_size) {
518 size_t len = 255 & (int)*p;
521 strcpy(buff, "user.");
522 name = buff + strlen(buff);
523 memcpy(name, p + 1, len);
525 setup_xattr(a, entry, namespace, name, buff, fd);
536 * Generic (stub) extended attribute support.
539 setup_xattrs(struct archive_read_disk *a,
540 struct archive_entry *entry, int fd)
542 (void)a; /* UNUSED */
543 (void)entry; /* UNUSED */
544 (void)fd; /* UNUSED */