2
* Copyright (c) 2003-2007 Tim Kientzle
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* Redistribution and use in source and binary forms, with or without
6
* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
15
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
#include "archive_platform.h"
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__FBSDID("$FreeBSD: head/lib/libarchive/archive_write_disk.c 201159 2009-12-29 05:35:40Z kientzle $");
30
#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#ifdef HAVE_SYS_EXTATTR_H
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#include <sys/extattr.h>
39
#ifdef HAVE_SYS_XATTR_H
40
#include <sys/xattr.h>
42
#ifdef HAVE_ATTR_XATTR_H
43
#include <attr/xattr.h>
45
#ifdef HAVE_SYS_IOCTL_H
46
#include <sys/ioctl.h>
48
#ifdef HAVE_SYS_STAT_H
51
#ifdef HAVE_SYS_TIME_H
54
#ifdef HAVE_SYS_UTIME_H
55
#include <sys/utime.h>
66
#ifdef HAVE_LINUX_FS_H
67
#include <linux/fs.h> /* for Linux file flags */
70
* Some Linux distributions have both linux/ext2_fs.h and ext2fs/ext2_fs.h.
71
* As the include guards don't agree, the order of include is important.
73
#ifdef HAVE_LINUX_EXT2_FS_H
74
#include <linux/ext2_fs.h> /* for Linux file flags */
76
#if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__)
77
#include <ext2fs/ext2_fs.h> /* Linux file flags, broken on Cygwin */
100
#include "archive_string.h"
101
#include "archive_entry.h"
102
#include "archive_private.h"
109
struct fixup_entry *next;
114
unsigned long atime_nanos;
115
unsigned long birthtime_nanos;
116
unsigned long mtime_nanos;
117
unsigned long fflags_set;
118
int fixup; /* bitmask of what needs fixing */
123
* We use a bitmask to track which operations remain to be done for
124
* this file. In particular, this helps us avoid unnecessary
125
* operations when it's possible to take care of one step as a
126
* side-effect of another. For example, mkdir() can specify the mode
127
* for the newly-created object but symlink() cannot. This means we
128
* can skip chmod() if mkdir() succeeded, but we must explicitly
129
* chmod() if we're trying to create a directory that already exists
130
* (mkdir() failed) or if we're restoring a symlink. Similarly, we
131
* need to verify UID/GID before trying to restore SUID/SGID bits;
132
* that verification can occur explicitly through a stat() call or
133
* implicitly because of a successful chown() call.
135
#define TODO_MODE_FORCE 0x40000000
136
#define TODO_MODE_BASE 0x20000000
137
#define TODO_SUID 0x10000000
138
#define TODO_SUID_CHECK 0x08000000
139
#define TODO_SGID 0x04000000
140
#define TODO_SGID_CHECK 0x02000000
141
#define TODO_MODE (TODO_MODE_BASE|TODO_SUID|TODO_SGID)
142
#define TODO_TIMES ARCHIVE_EXTRACT_TIME
143
#define TODO_OWNER ARCHIVE_EXTRACT_OWNER
144
#define TODO_FFLAGS ARCHIVE_EXTRACT_FFLAGS
145
#define TODO_ACLS ARCHIVE_EXTRACT_ACL
146
#define TODO_XATTR ARCHIVE_EXTRACT_XATTR
148
struct archive_write_disk {
149
struct archive archive;
152
struct fixup_entry *fixup_list;
153
struct fixup_entry *current_fixup;
159
gid_t (*lookup_gid)(void *private, const char *gname, gid_t gid);
160
void (*cleanup_gid)(void *private);
161
void *lookup_gid_data;
162
uid_t (*lookup_uid)(void *private, const char *gname, gid_t gid);
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void (*cleanup_uid)(void *private);
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void *lookup_uid_data;
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* Full path of last file to satisfy symlink checks.
169
struct archive_string path_safe;
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* Cached stat data from disk for the current entry.
173
* If this is valid, pst points to st. Otherwise,
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/* Information about the object being restored right now. */
180
struct archive_entry *entry; /* Entry being extracted. */
181
char *name; /* Name of entry, possibly edited. */
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struct archive_string _name_data; /* backing store for 'name' */
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/* Tasks remaining for this object. */
185
/* Tasks deferred until end-of-archive. */
187
/* Options requested by the client. */
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/* Handle for the file we're restoring. */
191
/* Current offset for writing data to the file. */
193
/* Last offset actually written to disk. */
195
/* Maximum size of file, -1 if unknown. */
197
/* Dir we were in before this restore; only for deep paths. */
199
/* Mode we should use for this entry; affected by _PERM and umask. */
201
/* UID/GID to use in restoring this entry. */
207
* Default mode for dirs created automatically (will be modified by umask).
208
* Note that POSIX specifies 0777 for implicity-created dirs, "modified
209
* by the process' file creation mask."
211
#define DEFAULT_DIR_MODE 0777
213
* Dir modes are restored in two steps: During the extraction, the permissions
214
* in the archive are modified to match the following limits. During
215
* the post-extract fixup pass, the permissions from the archive are
218
#define MINIMUM_DIR_MODE 0700
219
#define MAXIMUM_DIR_MODE 0775
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static int check_symlinks(struct archive_write_disk *);
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static int create_filesystem_object(struct archive_write_disk *);
223
static struct fixup_entry *current_fixup(struct archive_write_disk *, const char *pathname);
225
static void edit_deep_directories(struct archive_write_disk *ad);
227
static int cleanup_pathname(struct archive_write_disk *);
228
static int create_dir(struct archive_write_disk *, char *);
229
static int create_parent_dir(struct archive_write_disk *, char *);
230
static int older(struct stat *, struct archive_entry *);
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static int restore_entry(struct archive_write_disk *);
232
#ifdef HAVE_POSIX_ACL
233
static int set_acl(struct archive_write_disk *, int fd, struct archive_entry *,
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acl_type_t, int archive_entry_acl_type, const char *tn);
236
static int set_acls(struct archive_write_disk *);
237
static int set_xattrs(struct archive_write_disk *);
238
static int set_fflags(struct archive_write_disk *);
239
static int set_fflags_platform(struct archive_write_disk *, int fd,
240
const char *name, mode_t mode,
241
unsigned long fflags_set, unsigned long fflags_clear);
242
static int set_ownership(struct archive_write_disk *);
243
static int set_mode(struct archive_write_disk *, int mode);
244
static int set_time(int, int, const char *, time_t, long, time_t, long);
245
static int set_times(struct archive_write_disk *);
246
static struct fixup_entry *sort_dir_list(struct fixup_entry *p);
247
static gid_t trivial_lookup_gid(void *, const char *, gid_t);
248
static uid_t trivial_lookup_uid(void *, const char *, uid_t);
249
static ssize_t write_data_block(struct archive_write_disk *,
250
const char *, size_t);
252
static struct archive_vtable *archive_write_disk_vtable(void);
254
static int _archive_write_close(struct archive *);
255
static int _archive_write_finish(struct archive *);
256
static int _archive_write_header(struct archive *, struct archive_entry *);
257
static int _archive_write_finish_entry(struct archive *);
258
static ssize_t _archive_write_data(struct archive *, const void *, size_t);
259
static ssize_t _archive_write_data_block(struct archive *, const void *, size_t, off_t);
262
_archive_write_disk_lazy_stat(struct archive_write_disk *a)
264
if (a->pst != NULL) {
265
/* Already have stat() data available. */
269
if (a->fd >= 0 && fstat(a->fd, &a->st) == 0) {
275
* XXX At this point, symlinks should not be hit, otherwise
276
* XXX a race occured. Do we want to check explicitly for that?
278
if (lstat(a->name, &a->st) == 0) {
282
archive_set_error(&a->archive, errno, "Couldn't stat file");
283
return (ARCHIVE_WARN);
286
static struct archive_vtable *
287
archive_write_disk_vtable(void)
289
static struct archive_vtable av;
290
static int inited = 0;
293
av.archive_close = _archive_write_close;
294
av.archive_finish = _archive_write_finish;
295
av.archive_write_header = _archive_write_header;
296
av.archive_write_finish_entry = _archive_write_finish_entry;
297
av.archive_write_data = _archive_write_data;
298
av.archive_write_data_block = _archive_write_data_block;
305
archive_write_disk_set_options(struct archive *_a, int flags)
307
struct archive_write_disk *a = (struct archive_write_disk *)_a;
315
* Extract this entry to disk.
317
* TODO: Validate hardlinks. According to the standards, we're
318
* supposed to check each extracted hardlink and squawk if it refers
319
* to a file that we didn't restore. I'm not entirely convinced this
320
* is a good idea, but more importantly: Is there any way to validate
321
* hardlinks without keeping a complete list of filenames from the
322
* entire archive?? Ugh.
326
_archive_write_header(struct archive *_a, struct archive_entry *entry)
328
struct archive_write_disk *a = (struct archive_write_disk *)_a;
329
struct fixup_entry *fe;
332
__archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
333
ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
334
"archive_write_disk_header");
335
archive_clear_error(&a->archive);
336
if (a->archive.state & ARCHIVE_STATE_DATA) {
337
r = _archive_write_finish_entry(&a->archive);
338
if (r == ARCHIVE_FATAL)
342
/* Set up for this particular entry. */
344
a->current_fixup = NULL;
347
archive_entry_free(a->entry);
350
a->entry = archive_entry_clone(entry);
354
a->uid = a->user_uid;
355
a->mode = archive_entry_mode(a->entry);
356
if (archive_entry_size_is_set(a->entry))
357
a->filesize = archive_entry_size(a->entry);
360
archive_strcpy(&(a->_name_data), archive_entry_pathname(a->entry));
361
a->name = a->_name_data.s;
362
archive_clear_error(&a->archive);
365
* Clean up the requested path. This is necessary for correct
366
* dir restores; the dir restore logic otherwise gets messed
367
* up by nonsense like "dir/.".
369
ret = cleanup_pathname(a);
370
if (ret != ARCHIVE_OK)
374
* Set the umask to zero so we get predictable mode settings.
375
* This gets done on every call to _write_header in case the
376
* user edits their umask during the extraction for some
377
* reason. This will be reset before we return. Note that we
378
* don't need to do this in _finish_entry, as the chmod(), etc,
379
* system calls don't obey umask.
381
a->user_umask = umask(0);
382
/* From here on, early exit requires "goto done" to clean up. */
384
/* Figure out what we need to do for this entry. */
385
a->todo = TODO_MODE_BASE;
386
if (a->flags & ARCHIVE_EXTRACT_PERM) {
387
a->todo |= TODO_MODE_FORCE; /* Be pushy about permissions. */
389
* SGID requires an extra "check" step because we
390
* cannot easily predict the GID that the system will
391
* assign. (Different systems assign GIDs to files
392
* based on a variety of criteria, including process
393
* credentials and the gid of the enclosing
394
* directory.) We can only restore the SGID bit if
395
* the file has the right GID, and we only know the
396
* GID if we either set it (see set_ownership) or if
397
* we've actually called stat() on the file after it
398
* was restored. Since there are several places at
399
* which we might verify the GID, we need a TODO bit
402
if (a->mode & S_ISGID)
403
a->todo |= TODO_SGID | TODO_SGID_CHECK;
405
* Verifying the SUID is simpler, but can still be
406
* done in multiple ways, hence the separate "check" bit.
408
if (a->mode & S_ISUID)
409
a->todo |= TODO_SUID | TODO_SUID_CHECK;
412
* User didn't request full permissions, so don't
413
* restore SUID, SGID bits and obey umask.
418
a->mode &= ~a->user_umask;
420
#if !defined(_WIN32) || defined(__CYGWIN__)
421
if (a->flags & ARCHIVE_EXTRACT_OWNER)
422
a->todo |= TODO_OWNER;
424
if (a->flags & ARCHIVE_EXTRACT_TIME)
425
a->todo |= TODO_TIMES;
426
if (a->flags & ARCHIVE_EXTRACT_ACL)
427
a->todo |= TODO_ACLS;
428
if (a->flags & ARCHIVE_EXTRACT_XATTR)
429
a->todo |= TODO_XATTR;
430
if (a->flags & ARCHIVE_EXTRACT_FFLAGS)
431
a->todo |= TODO_FFLAGS;
432
if (a->flags & ARCHIVE_EXTRACT_SECURE_SYMLINKS) {
433
ret = check_symlinks(a);
434
if (ret != ARCHIVE_OK)
438
/* If path exceeds PATH_MAX, shorten the path. */
439
edit_deep_directories(a);
442
ret = restore_entry(a);
445
* TODO: There are rumours that some extended attributes must
446
* be restored before file data is written. If this is true,
447
* then we either need to write all extended attributes both
448
* before and after restoring the data, or find some rule for
449
* determining which must go first and which last. Due to the
450
* many ways people are using xattrs, this may prove to be an
451
* intractable problem.
455
/* If we changed directory above, restore it here. */
456
if (a->restore_pwd >= 0) {
457
r = fchdir(a->restore_pwd);
459
archive_set_error(&a->archive, errno, "chdir() failure");
462
close(a->restore_pwd);
468
* Fixup uses the unedited pathname from archive_entry_pathname(),
469
* because it is relative to the base dir and the edited path
470
* might be relative to some intermediate dir as a result of the
471
* deep restore logic.
473
if (a->deferred & TODO_MODE) {
474
fe = current_fixup(a, archive_entry_pathname(entry));
475
fe->fixup |= TODO_MODE_BASE;
479
if ((a->deferred & TODO_TIMES)
480
&& (archive_entry_mtime_is_set(entry)
481
|| archive_entry_atime_is_set(entry))) {
482
fe = current_fixup(a, archive_entry_pathname(entry));
483
fe->fixup |= TODO_TIMES;
484
if (archive_entry_atime_is_set(entry)) {
485
fe->atime = archive_entry_atime(entry);
486
fe->atime_nanos = archive_entry_atime_nsec(entry);
488
/* If atime is unset, use start time. */
489
fe->atime = a->start_time;
492
if (archive_entry_mtime_is_set(entry)) {
493
fe->mtime = archive_entry_mtime(entry);
494
fe->mtime_nanos = archive_entry_mtime_nsec(entry);
496
/* If mtime is unset, use start time. */
497
fe->mtime = a->start_time;
500
if (archive_entry_birthtime_is_set(entry)) {
501
fe->birthtime = archive_entry_birthtime(entry);
502
fe->birthtime_nanos = archive_entry_birthtime_nsec(entry);
504
/* If birthtime is unset, use mtime. */
505
fe->birthtime = fe->mtime;
506
fe->birthtime_nanos = fe->mtime_nanos;
510
if (a->deferred & TODO_FFLAGS) {
511
fe = current_fixup(a, archive_entry_pathname(entry));
512
fe->fixup |= TODO_FFLAGS;
513
/* TODO: Complete this.. defer fflags from below. */
516
/* We've created the object and are ready to pour data into it. */
517
if (ret >= ARCHIVE_WARN)
518
a->archive.state = ARCHIVE_STATE_DATA;
520
* If it's not open, tell our client not to try writing.
521
* In particular, dirs, links, etc, don't get written to.
524
archive_entry_set_size(entry, 0);
528
/* Restore the user's umask before returning. */
529
umask(a->user_umask);
535
archive_write_disk_set_skip_file(struct archive *_a, dev_t d, ino_t i)
537
struct archive_write_disk *a = (struct archive_write_disk *)_a;
538
__archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
539
ARCHIVE_STATE_ANY, "archive_write_disk_set_skip_file");
540
a->skip_file_dev = d;
541
a->skip_file_ino = i;
546
write_data_block(struct archive_write_disk *a, const char *buff, size_t size)
548
uint64_t start_size = size;
549
ssize_t bytes_written = 0;
550
ssize_t block_size = 0, bytes_to_write;
555
if (a->filesize == 0 || a->fd < 0) {
556
archive_set_error(&a->archive, 0,
557
"Attempt to write to an empty file");
558
return (ARCHIVE_WARN);
561
if (a->flags & ARCHIVE_EXTRACT_SPARSE) {
562
#if HAVE_STRUCT_STAT_ST_BLKSIZE
564
if ((r = _archive_write_disk_lazy_stat(a)) != ARCHIVE_OK)
566
block_size = a->pst->st_blksize;
568
/* XXX TODO XXX Is there a more appropriate choice here ? */
569
/* This needn't match the filesystem allocation size. */
570
block_size = 16*1024;
574
/* If this write would run beyond the file size, truncate it. */
575
if (a->filesize >= 0 && (off_t)(a->offset + size) > a->filesize)
576
start_size = size = (size_t)(a->filesize - a->offset);
578
/* Write the data. */
580
if (block_size == 0) {
581
bytes_to_write = size;
583
/* We're sparsifying the file. */
587
/* Skip leading zero bytes. */
588
for (p = buff, end = buff + size; p < end; ++p) {
592
a->offset += p - buff;
598
/* Calculate next block boundary after offset. */
600
= (a->offset / block_size + 1) * block_size;
602
/* If the adjusted write would cross block boundary,
603
* truncate it to the block boundary. */
604
bytes_to_write = size;
605
if (a->offset + bytes_to_write > block_end)
606
bytes_to_write = block_end - a->offset;
608
/* Seek if necessary to the specified offset. */
609
if (a->offset != a->fd_offset) {
610
if (lseek(a->fd, a->offset, SEEK_SET) < 0) {
611
archive_set_error(&a->archive, errno,
613
return (ARCHIVE_FATAL);
615
a->fd_offset = a->offset;
616
a->archive.file_position = a->offset;
617
a->archive.raw_position = a->offset;
619
bytes_written = write(a->fd, buff, bytes_to_write);
620
if (bytes_written < 0) {
621
archive_set_error(&a->archive, errno, "Write failed");
622
return (ARCHIVE_WARN);
624
buff += bytes_written;
625
size -= bytes_written;
626
a->offset += bytes_written;
627
a->archive.file_position += bytes_written;
628
a->archive.raw_position += bytes_written;
629
a->fd_offset = a->offset;
631
return (start_size - size);
635
_archive_write_data_block(struct archive *_a,
636
const void *buff, size_t size, off_t offset)
638
struct archive_write_disk *a = (struct archive_write_disk *)_a;
641
__archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
642
ARCHIVE_STATE_DATA, "archive_write_disk_block");
645
r = write_data_block(a, buff, size);
648
if ((size_t)r < size) {
649
archive_set_error(&a->archive, 0,
650
"Write request too large");
651
return (ARCHIVE_WARN);
657
_archive_write_data(struct archive *_a, const void *buff, size_t size)
659
struct archive_write_disk *a = (struct archive_write_disk *)_a;
661
__archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
662
ARCHIVE_STATE_DATA, "archive_write_data");
664
return (write_data_block(a, buff, size));
668
_archive_write_finish_entry(struct archive *_a)
670
struct archive_write_disk *a = (struct archive_write_disk *)_a;
671
int ret = ARCHIVE_OK;
673
__archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
674
ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
675
"archive_write_finish_entry");
676
if (a->archive.state & ARCHIVE_STATE_HEADER)
678
archive_clear_error(&a->archive);
680
/* Pad or truncate file to the right size. */
682
/* There's no file. */
683
} else if (a->filesize < 0) {
684
/* File size is unknown, so we can't set the size. */
685
} else if (a->fd_offset == a->filesize) {
686
/* Last write ended at exactly the filesize; we're done. */
687
/* Hopefully, this is the common case. */
690
if (ftruncate(a->fd, a->filesize) == -1 &&
692
archive_set_error(&a->archive, errno,
693
"File size could not be restored");
694
return (ARCHIVE_FAILED);
698
* Not all platforms implement the XSI option to
699
* extend files via ftruncate. Stat() the file again
700
* to see what happened.
703
if ((ret = _archive_write_disk_lazy_stat(a)) != ARCHIVE_OK)
705
/* We can use lseek()/write() to extend the file if
706
* ftruncate didn't work or isn't available. */
707
if (a->st.st_size < a->filesize) {
708
const char nul = '\0';
709
if (lseek(a->fd, a->filesize - 1, SEEK_SET) < 0) {
710
archive_set_error(&a->archive, errno,
712
return (ARCHIVE_FATAL);
714
if (write(a->fd, &nul, 1) < 0) {
715
archive_set_error(&a->archive, errno,
716
"Write to restore size failed");
717
return (ARCHIVE_FATAL);
723
/* Restore metadata. */
726
* Look up the "real" UID only if we're going to need it.
727
* TODO: the TODO_SGID condition can be dropped here, can't it?
729
if (a->todo & (TODO_OWNER | TODO_SUID | TODO_SGID)) {
730
a->uid = a->lookup_uid(a->lookup_uid_data,
731
archive_entry_uname(a->entry),
732
archive_entry_uid(a->entry));
734
/* Look up the "real" GID only if we're going to need it. */
735
/* TODO: the TODO_SUID condition can be dropped here, can't it? */
736
if (a->todo & (TODO_OWNER | TODO_SGID | TODO_SUID)) {
737
a->gid = a->lookup_gid(a->lookup_gid_data,
738
archive_entry_gname(a->entry),
739
archive_entry_gid(a->entry));
742
* If restoring ownership, do it before trying to restore suid/sgid
743
* bits. If we set the owner, we know what it is and can skip
744
* a stat() call to examine the ownership of the file on disk.
746
if (a->todo & TODO_OWNER)
747
ret = set_ownership(a);
748
if (a->todo & TODO_MODE) {
749
int r2 = set_mode(a, a->mode);
750
if (r2 < ret) ret = r2;
752
if (a->todo & TODO_ACLS) {
753
int r2 = set_acls(a);
754
if (r2 < ret) ret = r2;
758
* Security-related extended attributes (such as
759
* security.capability on Linux) have to be restored last,
760
* since they're implicitly removed by other file changes.
762
if (a->todo & TODO_XATTR) {
763
int r2 = set_xattrs(a);
764
if (r2 < ret) ret = r2;
768
* Some flags prevent file modification; they must be restored after
769
* file contents are written.
771
if (a->todo & TODO_FFLAGS) {
772
int r2 = set_fflags(a);
773
if (r2 < ret) ret = r2;
776
* Time has to be restored after all other metadata;
777
* otherwise atime will get changed.
779
if (a->todo & TODO_TIMES) {
780
int r2 = set_times(a);
781
if (r2 < ret) ret = r2;
784
/* If there's an fd, we can close it now. */
789
/* If there's an entry, we can release it now. */
791
archive_entry_free(a->entry);
794
a->archive.state = ARCHIVE_STATE_HEADER;
799
archive_write_disk_set_group_lookup(struct archive *_a,
801
gid_t (*lookup_gid)(void *private, const char *gname, gid_t gid),
802
void (*cleanup_gid)(void *private))
804
struct archive_write_disk *a = (struct archive_write_disk *)_a;
805
__archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
806
ARCHIVE_STATE_ANY, "archive_write_disk_set_group_lookup");
808
a->lookup_gid = lookup_gid;
809
a->cleanup_gid = cleanup_gid;
810
a->lookup_gid_data = private_data;
815
archive_write_disk_set_user_lookup(struct archive *_a,
817
uid_t (*lookup_uid)(void *private, const char *uname, uid_t uid),
818
void (*cleanup_uid)(void *private))
820
struct archive_write_disk *a = (struct archive_write_disk *)_a;
821
__archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
822
ARCHIVE_STATE_ANY, "archive_write_disk_set_user_lookup");
824
a->lookup_uid = lookup_uid;
825
a->cleanup_uid = cleanup_uid;
826
a->lookup_uid_data = private_data;
832
* Create a new archive_write_disk object and initialize it with global state.
835
archive_write_disk_new(void)
837
struct archive_write_disk *a;
839
a = (struct archive_write_disk *)malloc(sizeof(*a));
842
memset(a, 0, sizeof(*a));
843
a->archive.magic = ARCHIVE_WRITE_DISK_MAGIC;
844
/* We're ready to write a header immediately. */
845
a->archive.state = ARCHIVE_STATE_HEADER;
846
a->archive.vtable = archive_write_disk_vtable();
847
a->lookup_uid = trivial_lookup_uid;
848
a->lookup_gid = trivial_lookup_gid;
849
a->start_time = time(NULL);
851
a->user_uid = geteuid();
852
#endif /* HAVE_GETEUID */
853
if (archive_string_ensure(&a->path_safe, 512) == NULL) {
857
return (&a->archive);
862
* If pathname is longer than PATH_MAX, chdir to a suitable
863
* intermediate dir and edit the path down to a shorter suffix. Note
864
* that this routine never returns an error; if the chdir() attempt
865
* fails for any reason, we just go ahead with the long pathname. The
866
* object creation is likely to fail, but any error will get handled
871
edit_deep_directories(struct archive_write_disk *a)
874
char *tail = a->name;
878
/* If path is short, avoid the open() below. */
879
if (strlen(tail) <= PATH_MAX)
882
/* Try to record our starting dir. */
883
a->restore_pwd = open(".", O_RDONLY | O_BINARY);
884
if (a->restore_pwd < 0)
887
/* As long as the path is too long... */
888
while (strlen(tail) > PATH_MAX) {
889
/* Locate a dir prefix shorter than PATH_MAX. */
890
tail += PATH_MAX - 8;
891
while (tail > a->name && *tail != '/')
893
/* Exit if we find a too-long path component. */
896
/* Create the intermediate dir and chdir to it. */
897
*tail = '\0'; /* Terminate dir portion */
898
ret = create_dir(a, a->name);
899
if (ret == ARCHIVE_OK && chdir(a->name) != 0)
900
ret = ARCHIVE_FAILED;
901
*tail = '/'; /* Restore the / we removed. */
902
if (ret != ARCHIVE_OK)
905
/* The chdir() succeeded; we've now shortened the path. */
913
* The main restore function.
916
restore_entry(struct archive_write_disk *a)
918
int ret = ARCHIVE_OK, en;
920
if (a->flags & ARCHIVE_EXTRACT_UNLINK && !S_ISDIR(a->mode)) {
922
* TODO: Fix this. Apparently, there are platforms
923
* that still allow root to hose the entire filesystem
924
* by unlinking a dir. The S_ISDIR() test above
925
* prevents us from using unlink() here if the new
926
* object is a dir, but that doesn't mean the old
927
* object isn't a dir.
929
if (unlink(a->name) == 0) {
930
/* We removed it, reset cached stat. */
932
} else if (errno == ENOENT) {
933
/* File didn't exist, that's just as good. */
934
} else if (rmdir(a->name) == 0) {
935
/* It was a dir, but now it's gone. */
938
/* We tried, but couldn't get rid of it. */
939
archive_set_error(&a->archive, errno,
941
return(ARCHIVE_FAILED);
945
/* Try creating it first; if this fails, we'll try to recover. */
946
en = create_filesystem_object(a);
948
if ((en == ENOTDIR || en == ENOENT)
949
&& !(a->flags & ARCHIVE_EXTRACT_NO_AUTODIR)) {
950
/* If the parent dir doesn't exist, try creating it. */
951
create_parent_dir(a, a->name);
952
/* Now try to create the object again. */
953
en = create_filesystem_object(a);
956
if ((en == EISDIR || en == EEXIST)
957
&& (a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
958
/* If we're not overwriting, we're done. */
959
archive_set_error(&a->archive, en, "Already exists");
960
return (ARCHIVE_FAILED);
964
* Some platforms return EISDIR if you call
965
* open(O_WRONLY | O_EXCL | O_CREAT) on a directory, some
966
* return EEXIST. POSIX is ambiguous, requiring EISDIR
967
* for open(O_WRONLY) on a dir and EEXIST for open(O_EXCL | O_CREAT)
968
* on an existing item.
971
/* A dir is in the way of a non-dir, rmdir it. */
972
if (rmdir(a->name) != 0) {
973
archive_set_error(&a->archive, errno,
974
"Can't remove already-existing dir");
975
return (ARCHIVE_FAILED);
979
en = create_filesystem_object(a);
980
} else if (en == EEXIST) {
982
* We know something is in the way, but we don't know what;
983
* we need to find out before we go any further.
987
* The SECURE_SYMLINK logic has already removed a
988
* symlink to a dir if the client wants that. So
989
* follow the symlink if we're creating a dir.
991
if (S_ISDIR(a->mode))
992
r = stat(a->name, &a->st);
994
* If it's not a dir (or it's a broken symlink),
995
* then don't follow it.
997
if (r != 0 || !S_ISDIR(a->mode))
998
r = lstat(a->name, &a->st);
1000
archive_set_error(&a->archive, errno,
1001
"Can't stat existing object");
1002
return (ARCHIVE_FAILED);
1006
* NO_OVERWRITE_NEWER doesn't apply to directories.
1008
if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER)
1009
&& !S_ISDIR(a->st.st_mode)) {
1010
if (!older(&(a->st), a->entry)) {
1011
archive_set_error(&a->archive, 0,
1012
"File on disk is not older; skipping.");
1013
return (ARCHIVE_FAILED);
1017
/* If it's our archive, we're done. */
1018
if (a->skip_file_dev > 0 &&
1019
a->skip_file_ino > 0 &&
1020
a->st.st_dev == a->skip_file_dev &&
1021
a->st.st_ino == a->skip_file_ino) {
1022
archive_set_error(&a->archive, 0, "Refusing to overwrite archive");
1023
return (ARCHIVE_FAILED);
1026
if (!S_ISDIR(a->st.st_mode)) {
1027
/* A non-dir is in the way, unlink it. */
1028
if (unlink(a->name) != 0) {
1029
archive_set_error(&a->archive, errno,
1030
"Can't unlink already-existing object");
1031
return (ARCHIVE_FAILED);
1035
en = create_filesystem_object(a);
1036
} else if (!S_ISDIR(a->mode)) {
1037
/* A dir is in the way of a non-dir, rmdir it. */
1038
if (rmdir(a->name) != 0) {
1039
archive_set_error(&a->archive, errno,
1040
"Can't remove already-existing dir");
1041
return (ARCHIVE_FAILED);
1044
en = create_filesystem_object(a);
1047
* There's a dir in the way of a dir. Don't
1048
* waste time with rmdir()/mkdir(), just fix
1049
* up the permissions on the existing dir.
1050
* Note that we don't change perms on existing
1051
* dirs unless _EXTRACT_PERM is specified.
1053
if ((a->mode != a->st.st_mode)
1054
&& (a->todo & TODO_MODE_FORCE))
1055
a->deferred |= (a->todo & TODO_MODE);
1056
/* Ownership doesn't need deferred fixup. */
1057
en = 0; /* Forget the EEXIST. */
1062
/* Everything failed; give up here. */
1063
archive_set_error(&a->archive, en, "Can't create '%s'",
1065
return (ARCHIVE_FAILED);
1068
a->pst = NULL; /* Cached stat data no longer valid. */
1073
* Returns 0 if creation succeeds, or else returns errno value from
1074
* the failed system call. Note: This function should only ever perform
1075
* a single system call.
1078
create_filesystem_object(struct archive_write_disk *a)
1080
/* Create the entry. */
1081
const char *linkname;
1082
mode_t final_mode, mode;
1085
/* We identify hard/symlinks according to the link names. */
1086
/* Since link(2) and symlink(2) don't handle modes, we're done here. */
1087
linkname = archive_entry_hardlink(a->entry);
1088
if (linkname != NULL) {
1092
r = link(linkname, a->name) ? errno : 0;
1094
* New cpio and pax formats allow hardlink entries
1095
* to carry data, so we may have to open the file
1096
* for hardlink entries.
1098
* If the hardlink was successfully created and
1099
* the archive doesn't have carry data for it,
1100
* consider it to be non-authoritive for meta data.
1101
* This is consistent with GNU tar and BSD pax.
1102
* If the hardlink does carry data, let the last
1103
* archive entry decide ownership.
1105
if (r == 0 && a->filesize <= 0) {
1108
} if (r == 0 && a->filesize > 0) {
1109
a->fd = open(a->name, O_WRONLY | O_TRUNC | O_BINARY);
1116
linkname = archive_entry_symlink(a->entry);
1117
if (linkname != NULL) {
1119
return symlink(linkname, a->name) ? errno : 0;
1126
* The remaining system calls all set permissions, so let's
1127
* try to take advantage of that to avoid an extra chmod()
1128
* call. (Recall that umask is set to zero right now!)
1131
/* Mode we want for the final restored object (w/o file type bits). */
1132
final_mode = a->mode & 07777;
1134
* The mode that will actually be restored in this step. Note
1135
* that SUID, SGID, etc, require additional work to ensure
1136
* security, so we never restore them at this point.
1138
mode = final_mode & 0777;
1140
switch (a->mode & AE_IFMT) {
1142
/* POSIX requires that we fall through here. */
1145
a->fd = open(a->name,
1146
O_WRONLY | O_CREAT | O_EXCL | O_BINARY, mode);
1151
/* Note: we use AE_IFCHR for the case label, and
1152
* S_IFCHR for the mknod() call. This is correct. */
1153
r = mknod(a->name, mode | S_IFCHR,
1154
archive_entry_rdev(a->entry));
1157
/* TODO: Find a better way to warn about our inability
1158
* to restore a char device node. */
1160
#endif /* HAVE_MKNOD */
1163
r = mknod(a->name, mode | S_IFBLK,
1164
archive_entry_rdev(a->entry));
1167
/* TODO: Find a better way to warn about our inability
1168
* to restore a block device node. */
1170
#endif /* HAVE_MKNOD */
1172
mode = (mode | MINIMUM_DIR_MODE) & MAXIMUM_DIR_MODE;
1173
r = mkdir(a->name, mode);
1175
/* Defer setting dir times. */
1176
a->deferred |= (a->todo & TODO_TIMES);
1177
a->todo &= ~TODO_TIMES;
1178
/* Never use an immediate chmod(). */
1179
/* We can't avoid the chmod() entirely if EXTRACT_PERM
1180
* because of SysV SGID inheritance. */
1181
if ((mode != final_mode)
1182
|| (a->flags & ARCHIVE_EXTRACT_PERM))
1183
a->deferred |= (a->todo & TODO_MODE);
1184
a->todo &= ~TODO_MODE;
1189
r = mkfifo(a->name, mode);
1192
/* TODO: Find a better way to warn about our inability
1193
* to restore a fifo. */
1195
#endif /* HAVE_MKFIFO */
1198
/* All the system calls above set errno on failure. */
1202
/* If we managed to set the final mode, we've avoided a chmod(). */
1203
if (mode == final_mode)
1204
a->todo &= ~TODO_MODE;
1209
* Cleanup function for archive_extract. Mostly, this involves processing
1210
* the fixup list, which is used to address a number of problems:
1211
* * Dir permissions might prevent us from restoring a file in that
1212
* dir, so we restore the dir with minimum 0700 permissions first,
1213
* then correct the mode at the end.
1214
* * Similarly, the act of restoring a file touches the directory
1215
* and changes the timestamp on the dir, so we have to touch-up dir
1216
* timestamps at the end as well.
1217
* * Some file flags can interfere with the restore by, for example,
1218
* preventing the creation of hardlinks to those files.
1220
* Note that tar/cpio do not require that archives be in a particular
1221
* order; there is no way to know when the last file has been restored
1222
* within a directory, so there's no way to optimize the memory usage
1223
* here by fixing up the directory any earlier than the
1226
* XXX TODO: Directory ACLs should be restored here, for the same
1227
* reason we set directory perms here. XXX
1230
_archive_write_close(struct archive *_a)
1232
struct archive_write_disk *a = (struct archive_write_disk *)_a;
1233
struct fixup_entry *next, *p;
1236
__archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1237
ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
1238
"archive_write_disk_close");
1239
ret = _archive_write_finish_entry(&a->archive);
1241
/* Sort dir list so directories are fixed up in depth-first order. */
1242
p = sort_dir_list(a->fixup_list);
1245
a->pst = NULL; /* Mark stat cache as out-of-date. */
1246
if (p->fixup & TODO_TIMES) {
1248
/* {f,l,}utimes() are preferred, when available. */
1249
#if defined(_WIN32) && !defined(__CYGWIN__)
1250
struct __timeval times[2];
1252
struct timeval times[2];
1254
times[0].tv_sec = p->atime;
1255
times[0].tv_usec = p->atime_nanos / 1000;
1256
#ifdef HAVE_STRUCT_STAT_ST_BIRTHTIME
1257
/* if it's valid and not mtime, push the birthtime first */
1258
if (((times[1].tv_sec = p->birthtime) < p->mtime) &&
1261
times[1].tv_usec = p->birthtime_nanos / 1000;
1262
utimes(p->name, times);
1265
times[1].tv_sec = p->mtime;
1266
times[1].tv_usec = p->mtime_nanos / 1000;
1268
lutimes(p->name, times);
1270
utimes(p->name, times);
1273
/* utime() is more portable, but less precise. */
1274
struct utimbuf times;
1275
times.modtime = p->mtime;
1276
times.actime = p->atime;
1278
utime(p->name, ×);
1281
if (p->fixup & TODO_MODE_BASE)
1282
chmod(p->name, p->mode);
1284
if (p->fixup & TODO_FFLAGS)
1285
set_fflags_platform(a, -1, p->name,
1286
p->mode, p->fflags_set, 0);
1293
a->fixup_list = NULL;
1298
_archive_write_finish(struct archive *_a)
1300
struct archive_write_disk *a = (struct archive_write_disk *)_a;
1302
ret = _archive_write_close(&a->archive);
1303
if (a->cleanup_gid != NULL && a->lookup_gid_data != NULL)
1304
(a->cleanup_gid)(a->lookup_gid_data);
1305
if (a->cleanup_uid != NULL && a->lookup_uid_data != NULL)
1306
(a->cleanup_uid)(a->lookup_uid_data);
1308
archive_entry_free(a->entry);
1309
archive_string_free(&a->_name_data);
1310
archive_string_free(&a->archive.error_string);
1311
archive_string_free(&a->path_safe);
1317
* Simple O(n log n) merge sort to order the fixup list. In
1318
* particular, we want to restore dir timestamps depth-first.
1320
static struct fixup_entry *
1321
sort_dir_list(struct fixup_entry *p)
1323
struct fixup_entry *a, *b, *t;
1327
/* A one-item list is already sorted. */
1328
if (p->next == NULL)
1331
/* Step 1: split the list. */
1335
/* Step a twice, t once. */
1341
/* Now, t is at the mid-point, so break the list here. */
1346
/* Step 2: Recursively sort the two sub-lists. */
1347
a = sort_dir_list(a);
1348
b = sort_dir_list(b);
1350
/* Step 3: Merge the returned lists. */
1351
/* Pick the first element for the merged list. */
1352
if (strcmp(a->name, b->name) > 0) {
1360
/* Always put the later element on the list first. */
1361
while (a != NULL && b != NULL) {
1362
if (strcmp(a->name, b->name) > 0) {
1372
/* Only one list is non-empty, so just splice it on. */
1382
* Returns a new, initialized fixup entry.
1384
* TODO: Reduce the memory requirements for this list by using a tree
1385
* structure rather than a simple list of names.
1387
static struct fixup_entry *
1388
new_fixup(struct archive_write_disk *a, const char *pathname)
1390
struct fixup_entry *fe;
1392
fe = (struct fixup_entry *)malloc(sizeof(struct fixup_entry));
1395
fe->next = a->fixup_list;
1398
fe->name = strdup(pathname);
1403
* Returns a fixup structure for the current entry.
1405
static struct fixup_entry *
1406
current_fixup(struct archive_write_disk *a, const char *pathname)
1408
if (a->current_fixup == NULL)
1409
a->current_fixup = new_fixup(a, pathname);
1410
return (a->current_fixup);
1413
/* TODO: Make this work. */
1415
* TODO: The deep-directory support bypasses this; disable deep directory
1416
* support if we're doing symlink checks.
1419
* TODO: Someday, integrate this with the deep dir support; they both
1420
* scan the path and both can be optimized by comparing against other
1423
/* TODO: Extend this to support symlinks on Windows Vista and later. */
1425
check_symlinks(struct archive_write_disk *a)
1427
#if !defined(HAVE_LSTAT)
1428
/* Platform doesn't have lstat, so we can't look for symlinks. */
1429
(void)a; /* UNUSED */
1430
return (ARCHIVE_OK);
1438
* Guard against symlink tricks. Reject any archive entry whose
1439
* destination would be altered by a symlink.
1441
/* Whatever we checked last time doesn't need to be re-checked. */
1444
while ((*pn != '\0') && (*p == *pn))
1447
/* Keep going until we've checked the entire name. */
1448
while (pn[0] != '\0' && (pn[0] != '/' || pn[1] != '\0')) {
1449
/* Skip the next path element. */
1450
while (*pn != '\0' && *pn != '/')
1454
/* Check that we haven't hit a symlink. */
1455
r = lstat(a->name, &st);
1457
/* We've hit a dir that doesn't exist; stop now. */
1458
if (errno == ENOENT)
1460
} else if (S_ISLNK(st.st_mode)) {
1463
* Last element is symlink; remove it
1464
* so we can overwrite it with the
1465
* item being extracted.
1467
if (unlink(a->name)) {
1468
archive_set_error(&a->archive, errno,
1469
"Could not remove symlink %s",
1472
return (ARCHIVE_FAILED);
1476
* Even if we did remove it, a warning
1477
* is in order. The warning is silly,
1478
* though, if we're just replacing one
1479
* symlink with another symlink.
1481
if (!S_ISLNK(a->mode)) {
1482
archive_set_error(&a->archive, 0,
1483
"Removing symlink %s",
1486
/* Symlink gone. No more problem! */
1489
} else if (a->flags & ARCHIVE_EXTRACT_UNLINK) {
1490
/* User asked us to remove problems. */
1491
if (unlink(a->name) != 0) {
1492
archive_set_error(&a->archive, 0,
1493
"Cannot remove intervening symlink %s",
1496
return (ARCHIVE_FAILED);
1500
archive_set_error(&a->archive, 0,
1501
"Cannot extract through symlink %s",
1504
return (ARCHIVE_FAILED);
1509
/* We've checked and/or cleaned the whole path, so remember it. */
1510
archive_strcpy(&a->path_safe, a->name);
1511
return (ARCHIVE_OK);
1515
#if defined(_WIN32) || defined(__CYGWIN__)
1517
* 1. Convert a path separator from '\' to '/' .
1518
* We shouldn't check multi-byte character directly because some
1519
* character-set have been using the '\' character for a part of
1520
* its multibyte character code.
1521
* 2. Replace unusable characters in Windows with underscore('_').
1522
* See also : http://msdn.microsoft.com/en-us/library/aa365247.aspx
1525
cleanup_pathname_win(struct archive_write_disk *a)
1533
for (p = a->name; *p != '\0'; p++) {
1537
/* Rewrite the path name if its character is a unusable. */
1538
if (*p == ':' || *p == '*' || *p == '?' || *p == '"' ||
1539
*p == '<' || *p == '>' || *p == '|')
1542
if (alen == 0 || l == 0)
1545
* Convert path separator.
1548
while (*p != '\0' && alen) {
1549
l = mbtowc(&wc, p, alen);
1551
while (*p != '\0') {
1558
if (l == 1 && wc == L'\\')
1567
* Canonicalize the pathname. In particular, this strips duplicate
1568
* '/' characters, '.' elements, and trailing '/'. It also raises an
1569
* error for an empty path, a trailing '..' or (if _SECURE_NODOTDOT is
1570
* set) any '..' in the path.
1573
cleanup_pathname(struct archive_write_disk *a)
1576
char separator = '\0';
1578
dest = src = a->name;
1580
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1581
"Invalid empty pathname");
1582
return (ARCHIVE_FAILED);
1585
#if defined(_WIN32) || defined(__CYGWIN__)
1586
cleanup_pathname_win(a);
1588
/* Skip leading '/'. */
1592
/* Scan the pathname one element at a time. */
1594
/* src points to first char after '/' */
1595
if (src[0] == '\0') {
1597
} else if (src[0] == '/') {
1598
/* Found '//', ignore second one. */
1601
} else if (src[0] == '.') {
1602
if (src[1] == '\0') {
1603
/* Ignore trailing '.' */
1605
} else if (src[1] == '/') {
1609
} else if (src[1] == '.') {
1610
if (src[2] == '/' || src[2] == '\0') {
1611
/* Conditionally warn about '..' */
1612
if (a->flags & ARCHIVE_EXTRACT_SECURE_NODOTDOT) {
1613
archive_set_error(&a->archive,
1615
"Path contains '..'");
1616
return (ARCHIVE_FAILED);
1620
* Note: Under no circumstances do we
1621
* remove '..' elements. In
1622
* particular, restoring
1623
* '/foo/../bar/' should create the
1624
* 'foo' dir as a side-effect.
1629
/* Copy current element, including leading '/'. */
1632
while (*src != '\0' && *src != '/') {
1639
/* Skip '/' separator. */
1643
* We've just copied zero or more path elements, not including the
1646
if (dest == a->name) {
1648
* Nothing got copied. The path must have been something
1649
* like '.' or '/' or './' or '/././././/./'.
1656
/* Terminate the result. */
1658
return (ARCHIVE_OK);
1662
* Create the parent directory of the specified path, assuming path
1663
* is already in mutable storage.
1666
create_parent_dir(struct archive_write_disk *a, char *path)
1671
/* Remove tail element to obtain parent name. */
1672
slash = strrchr(path, '/');
1674
return (ARCHIVE_OK);
1676
r = create_dir(a, path);
1682
* Create the specified dir, recursing to create parents as necessary.
1684
* Returns ARCHIVE_OK if the path exists when we're done here.
1685
* Otherwise, returns ARCHIVE_FAILED.
1686
* Assumes path is in mutable storage; path is unchanged on exit.
1689
create_dir(struct archive_write_disk *a, char *path)
1692
struct fixup_entry *le;
1694
mode_t mode_final, mode;
1697
/* Check for special names and just skip them. */
1698
slash = strrchr(path, '/');
1704
if (base[0] == '\0' ||
1705
(base[0] == '.' && base[1] == '\0') ||
1706
(base[0] == '.' && base[1] == '.' && base[2] == '\0')) {
1707
/* Don't bother trying to create null path, '.', or '..'. */
1708
if (slash != NULL) {
1710
r = create_dir(a, path);
1714
return (ARCHIVE_OK);
1718
* Yes, this should be stat() and not lstat(). Using lstat()
1719
* here loses the ability to extract through symlinks. Also note
1720
* that this should not use the a->st cache.
1722
if (stat(path, &st) == 0) {
1723
if (S_ISDIR(st.st_mode))
1724
return (ARCHIVE_OK);
1725
if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
1726
archive_set_error(&a->archive, EEXIST,
1727
"Can't create directory '%s'", path);
1728
return (ARCHIVE_FAILED);
1730
if (unlink(path) != 0) {
1731
archive_set_error(&a->archive, errno,
1732
"Can't create directory '%s': "
1733
"Conflicting file cannot be removed");
1734
return (ARCHIVE_FAILED);
1736
} else if (errno != ENOENT && errno != ENOTDIR) {
1738
archive_set_error(&a->archive, errno, "Can't test directory '%s'", path);
1739
return (ARCHIVE_FAILED);
1740
} else if (slash != NULL) {
1742
r = create_dir(a, path);
1744
if (r != ARCHIVE_OK)
1749
* Mode we want for the final restored directory. Per POSIX,
1750
* implicitly-created dirs must be created obeying the umask.
1751
* There's no mention whether this is different for privileged
1752
* restores (which the rest of this code handles by pretending
1753
* umask=0). I've chosen here to always obey the user's umask for
1754
* implicit dirs, even if _EXTRACT_PERM was specified.
1756
mode_final = DEFAULT_DIR_MODE & ~a->user_umask;
1757
/* Mode we want on disk during the restore process. */
1759
mode |= MINIMUM_DIR_MODE;
1760
mode &= MAXIMUM_DIR_MODE;
1761
if (mkdir(path, mode) == 0) {
1762
if (mode != mode_final) {
1763
le = new_fixup(a, path);
1764
le->fixup |=TODO_MODE_BASE;
1765
le->mode = mode_final;
1767
return (ARCHIVE_OK);
1771
* Without the following check, a/b/../b/c/d fails at the
1772
* second visit to 'b', so 'd' can't be created. Note that we
1773
* don't add it to the fixup list here, as it's already been
1776
if (stat(path, &st) == 0 && S_ISDIR(st.st_mode))
1777
return (ARCHIVE_OK);
1779
archive_set_error(&a->archive, errno, "Failed to create dir '%s'",
1781
return (ARCHIVE_FAILED);
1785
* Note: Although we can skip setting the user id if the desired user
1786
* id matches the current user, we cannot skip setting the group, as
1787
* many systems set the gid based on the containing directory. So
1788
* we have to perform a chown syscall if we want to set the SGID
1789
* bit. (The alternative is to stat() and then possibly chown(); it's
1790
* more efficient to skip the stat() and just always chown().) Note
1791
* that a successful chown() here clears the TODO_SGID_CHECK bit, which
1792
* allows set_mode to skip the stat() check for the GID.
1795
set_ownership(struct archive_write_disk *a)
1798
/* unfortunately, on win32 there is no 'root' user with uid 0,
1799
so we just have to try the chown and see if it works */
1801
/* If we know we can't change it, don't bother trying. */
1802
if (a->user_uid != 0 && a->user_uid != a->uid) {
1803
archive_set_error(&a->archive, errno,
1804
"Can't set UID=%d", a->uid);
1805
return (ARCHIVE_WARN);
1810
/* If we have an fd, we can avoid a race. */
1811
if (a->fd >= 0 && fchown(a->fd, a->uid, a->gid) == 0) {
1812
/* We've set owner and know uid/gid are correct. */
1813
a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
1814
return (ARCHIVE_OK);
1818
/* We prefer lchown() but will use chown() if that's all we have. */
1819
/* Of course, if we have neither, this will always fail. */
1821
if (lchown(a->name, a->uid, a->gid) == 0) {
1822
/* We've set owner and know uid/gid are correct. */
1823
a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
1824
return (ARCHIVE_OK);
1827
if (!S_ISLNK(a->mode) && chown(a->name, a->uid, a->gid) == 0) {
1828
/* We've set owner and know uid/gid are correct. */
1829
a->todo &= ~(TODO_OWNER | TODO_SGID_CHECK | TODO_SUID_CHECK);
1830
return (ARCHIVE_OK);
1834
archive_set_error(&a->archive, errno,
1835
"Can't set user=%d/group=%d for %s", a->uid, a->gid,
1837
return (ARCHIVE_WARN);
1841
#if defined(HAVE_UTIMENSAT) && defined(HAVE_FUTIMENS)
1843
* utimensat() and futimens() are defined in POSIX.1-2008. They provide ns
1844
* resolution and setting times on fd and on symlinks, too.
1847
set_time(int fd, int mode, const char *name,
1848
time_t atime, long atime_nsec,
1849
time_t mtime, long mtime_nsec)
1851
struct timespec ts[2];
1852
ts[0].tv_sec = atime;
1853
ts[0].tv_nsec = atime_nsec;
1854
ts[1].tv_sec = mtime;
1855
ts[1].tv_nsec = mtime_nsec;
1857
return futimens(fd, ts);
1858
return utimensat(AT_FDCWD, name, ts, AT_SYMLINK_NOFOLLOW);
1862
* The utimes()-family functions provide µs-resolution and
1863
* a way to set time on an fd or a symlink. We prefer them
1864
* when they're available and utimensat/futimens aren't there.
1867
set_time(int fd, int mode, const char *name,
1868
time_t atime, long atime_nsec,
1869
time_t mtime, long mtime_nsec)
1871
#if defined(_WIN32) && !defined(__CYGWIN__)
1872
struct __timeval times[2];
1874
struct timeval times[2];
1877
times[0].tv_sec = atime;
1878
times[0].tv_usec = atime_nsec / 1000;
1879
times[1].tv_sec = mtime;
1880
times[1].tv_usec = mtime_nsec / 1000;
1884
return (futimes(fd, times));
1886
(void)fd; /* UNUSED */
1889
(void)mode; /* UNUSED */
1890
return (lutimes(name, times));
1894
return (utimes(name, times));
1897
#elif defined(HAVE_UTIME)
1899
* utime() is an older, more standard interface that we'll use
1900
* if utimes() isn't available.
1903
set_time(int fd, int mode, const char *name,
1904
time_t atime, long atime_nsec,
1905
time_t mtime, long mtime_nsec)
1907
struct utimbuf times;
1908
(void)fd; /* UNUSED */
1909
(void)name; /* UNUSED */
1910
(void)atime_nsec; /* UNUSED */
1911
(void)mtime_nsec; /* UNUSED */
1912
times.actime = atime;
1913
times.modtime = mtime;
1915
return (ARCHIVE_OK);
1916
return (utime(name, ×));
1920
set_time(int fd, int mode, const char *name,
1921
time_t atime, long atime_nsec,
1922
time_t mtime, long mtime_nsec)
1924
return (ARCHIVE_WARN);
1929
set_times(struct archive_write_disk *a)
1931
time_t atime = a->start_time, mtime = a->start_time;
1932
long atime_nsec = 0, mtime_nsec = 0;
1934
/* If no time was provided, we're done. */
1935
if (!archive_entry_atime_is_set(a->entry)
1936
#if HAVE_STRUCT_STAT_ST_BIRTHTIME
1937
&& !archive_entry_birthtime_is_set(a->entry)
1939
&& !archive_entry_mtime_is_set(a->entry))
1940
return (ARCHIVE_OK);
1942
/* If no atime was specified, use start time instead. */
1943
/* In theory, it would be marginally more correct to use
1944
* time(NULL) here, but that would cost us an extra syscall
1945
* for little gain. */
1946
if (archive_entry_atime_is_set(a->entry)) {
1947
atime = archive_entry_atime(a->entry);
1948
atime_nsec = archive_entry_atime_nsec(a->entry);
1952
* If you have struct stat.st_birthtime, we assume BSD birthtime
1953
* semantics, in which {f,l,}utimes() updates birthtime to earliest
1954
* mtime. So we set the time twice, first using the birthtime,
1955
* then using the mtime.
1957
#if HAVE_STRUCT_STAT_ST_BIRTHTIME
1958
/* If birthtime is set, flush that through to disk first. */
1959
if (archive_entry_birthtime_is_set(a->entry))
1960
if (set_time(a->fd, a->mode, a->name, atime, atime_nsec,
1961
archive_entry_birthtime(a->entry),
1962
archive_entry_birthtime_nsec(a->entry))) {
1963
archive_set_error(&a->archive, errno,
1964
"Can't update time for %s",
1966
return (ARCHIVE_WARN);
1970
if (archive_entry_mtime_is_set(a->entry)) {
1971
mtime = archive_entry_mtime(a->entry);
1972
mtime_nsec = archive_entry_mtime_nsec(a->entry);
1974
if (set_time(a->fd, a->mode, a->name,
1975
atime, atime_nsec, mtime, mtime_nsec)) {
1976
archive_set_error(&a->archive, errno,
1977
"Can't update time for %s",
1979
return (ARCHIVE_WARN);
1983
* Note: POSIX does not provide a portable way to restore ctime.
1984
* (Apart from resetting the system clock, which is distasteful.)
1985
* So, any restoration of ctime will necessarily be OS-specific.
1988
return (ARCHIVE_OK);
1992
set_mode(struct archive_write_disk *a, int mode)
1995
mode &= 07777; /* Strip off file type bits. */
1997
if (a->todo & TODO_SGID_CHECK) {
1999
* If we don't know the GID is right, we must stat()
2000
* to verify it. We can't just check the GID of this
2001
* process, since systems sometimes set GID from
2002
* the enclosing dir or based on ACLs.
2004
if ((r = _archive_write_disk_lazy_stat(a)) != ARCHIVE_OK)
2006
if (a->pst->st_gid != a->gid) {
2008
#if !defined(_WIN32) || defined(__CYGWIN__)
2009
if (a->flags & ARCHIVE_EXTRACT_OWNER) {
2011
* This is only an error if you
2012
* requested owner restore. If you
2013
* didn't, we'll try to restore
2014
* sgid/suid, but won't consider it a
2015
* problem if we can't.
2017
archive_set_error(&a->archive, -1,
2018
"Can't restore SGID bit");
2023
/* While we're here, double-check the UID. */
2024
if (a->pst->st_uid != a->uid
2025
&& (a->todo & TODO_SUID)) {
2027
#if !defined(_WIN32) || defined(__CYGWIN__)
2028
if (a->flags & ARCHIVE_EXTRACT_OWNER) {
2029
archive_set_error(&a->archive, -1,
2030
"Can't restore SUID bit");
2035
a->todo &= ~TODO_SGID_CHECK;
2036
a->todo &= ~TODO_SUID_CHECK;
2037
} else if (a->todo & TODO_SUID_CHECK) {
2039
* If we don't know the UID is right, we can just check
2040
* the user, since all systems set the file UID from
2043
if (a->user_uid != a->uid) {
2045
#if !defined(_WIN32) || defined(__CYGWIN__)
2046
if (a->flags & ARCHIVE_EXTRACT_OWNER) {
2047
archive_set_error(&a->archive, -1,
2048
"Can't make file SUID");
2053
a->todo &= ~TODO_SUID_CHECK;
2056
if (S_ISLNK(a->mode)) {
2059
* If this is a symlink, use lchmod(). If the
2060
* platform doesn't support lchmod(), just skip it. A
2061
* platform that doesn't provide a way to set
2062
* permissions on symlinks probably ignores
2063
* permissions on symlinks, so a failure here has no
2066
if (lchmod(a->name, mode) != 0) {
2067
archive_set_error(&a->archive, errno,
2068
"Can't set permissions to 0%o", (int)mode);
2072
} else if (!S_ISDIR(a->mode)) {
2074
* If it's not a symlink and not a dir, then use
2075
* fchmod() or chmod(), depending on whether we have
2076
* an fd. Dirs get their perms set during the
2077
* post-extract fixup, which is handled elsewhere.
2081
if (fchmod(a->fd, mode) != 0) {
2082
archive_set_error(&a->archive, errno,
2083
"Can't set permissions to 0%o", (int)mode);
2088
/* If this platform lacks fchmod(), then
2089
* we'll just use chmod(). */
2090
if (chmod(a->name, mode) != 0) {
2091
archive_set_error(&a->archive, errno,
2092
"Can't set permissions to 0%o", (int)mode);
2100
set_fflags(struct archive_write_disk *a)
2102
struct fixup_entry *le;
2103
unsigned long set, clear;
2106
mode_t mode = archive_entry_mode(a->entry);
2109
* Make 'critical_flags' hold all file flags that can't be
2110
* immediately restored. For example, on BSD systems,
2111
* SF_IMMUTABLE prevents hardlinks from being created, so
2112
* should not be set until after any hardlinks are created. To
2113
* preserve some semblance of portability, this uses #ifdef
2114
* extensively. Ugly, but it works.
2116
* Yes, Virginia, this does create a security race. It's mitigated
2117
* somewhat by the practice of creating dirs 0700 until the extract
2118
* is done, but it would be nice if we could do more than that.
2119
* People restoring critical file systems should be wary of
2120
* other programs that might try to muck with files as they're
2123
/* Hopefully, the compiler will optimize this mess into a constant. */
2126
critical_flags |= SF_IMMUTABLE;
2129
critical_flags |= UF_IMMUTABLE;
2132
critical_flags |= SF_APPEND;
2135
critical_flags |= UF_APPEND;
2137
#ifdef EXT2_APPEND_FL
2138
critical_flags |= EXT2_APPEND_FL;
2140
#ifdef EXT2_IMMUTABLE_FL
2141
critical_flags |= EXT2_IMMUTABLE_FL;
2144
if (a->todo & TODO_FFLAGS) {
2145
archive_entry_fflags(a->entry, &set, &clear);
2148
* The first test encourages the compiler to eliminate
2149
* all of this if it's not necessary.
2151
if ((critical_flags != 0) && (set & critical_flags)) {
2152
le = current_fixup(a, a->name);
2153
le->fixup |= TODO_FFLAGS;
2154
le->fflags_set = set;
2155
/* Store the mode if it's not already there. */
2156
if ((le->fixup & TODO_MODE) == 0)
2159
r = set_fflags_platform(a, a->fd,
2160
a->name, mode, set, clear);
2161
if (r != ARCHIVE_OK)
2165
return (ARCHIVE_OK);
2169
#if ( defined(HAVE_LCHFLAGS) || defined(HAVE_CHFLAGS) || defined(HAVE_FCHFLAGS) ) && defined(HAVE_STRUCT_STAT_ST_FLAGS)
2171
* BSD reads flags using stat() and sets them with one of {f,l,}chflags()
2174
set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
2175
mode_t mode, unsigned long set, unsigned long clear)
2179
(void)mode; /* UNUSED */
2180
if (set == 0 && clear == 0)
2181
return (ARCHIVE_OK);
2184
* XXX Is the stat here really necessary? Or can I just use
2185
* the 'set' flags directly? In particular, I'm not sure
2186
* about the correct approach if we're overwriting an existing
2187
* file that already has flags on it. XXX
2189
if ((r = _archive_write_disk_lazy_stat(a)) != ARCHIVE_OK)
2192
a->st.st_flags &= ~clear;
2193
a->st.st_flags |= set;
2194
#ifdef HAVE_FCHFLAGS
2195
/* If platform has fchflags() and we were given an fd, use it. */
2196
if (fd >= 0 && fchflags(fd, a->st.st_flags) == 0)
2197
return (ARCHIVE_OK);
2200
* If we can't use the fd to set the flags, we'll use the
2201
* pathname to set flags. We prefer lchflags() but will use
2202
* chflags() if we must.
2204
#ifdef HAVE_LCHFLAGS
2205
if (lchflags(name, a->st.st_flags) == 0)
2206
return (ARCHIVE_OK);
2207
#elif defined(HAVE_CHFLAGS)
2208
if (S_ISLNK(a->st.st_mode)) {
2209
archive_set_error(&a->archive, errno,
2210
"Can't set file flags on symlink.");
2211
return (ARCHIVE_WARN);
2213
if (chflags(name, a->st.st_flags) == 0)
2214
return (ARCHIVE_OK);
2216
archive_set_error(&a->archive, errno,
2217
"Failed to set file flags");
2218
return (ARCHIVE_WARN);
2221
#elif defined(EXT2_IOC_GETFLAGS) && defined(EXT2_IOC_SETFLAGS)
2223
* Linux uses ioctl() to read and write file flags.
2226
set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
2227
mode_t mode, unsigned long set, unsigned long clear)
2231
unsigned long newflags, oldflags;
2232
unsigned long sf_mask = 0;
2234
if (set == 0 && clear == 0)
2235
return (ARCHIVE_OK);
2236
/* Only regular files and dirs can have flags. */
2237
if (!S_ISREG(mode) && !S_ISDIR(mode))
2238
return (ARCHIVE_OK);
2240
/* If we weren't given an fd, open it ourselves. */
2242
myfd = open(name, O_RDONLY | O_NONBLOCK | O_BINARY);
2244
return (ARCHIVE_OK);
2247
* Linux has no define for the flags that are only settable by
2248
* the root user. This code may seem a little complex, but
2249
* there seem to be some Linux systems that lack these
2250
* defines. (?) The code below degrades reasonably gracefully
2251
* if sf_mask is incomplete.
2253
#ifdef EXT2_IMMUTABLE_FL
2254
sf_mask |= EXT2_IMMUTABLE_FL;
2256
#ifdef EXT2_APPEND_FL
2257
sf_mask |= EXT2_APPEND_FL;
2260
* XXX As above, this would be way simpler if we didn't have
2261
* to read the current flags from disk. XXX
2264
/* Try setting the flags as given. */
2265
if (ioctl(myfd, EXT2_IOC_GETFLAGS, &oldflags) >= 0) {
2266
newflags = (oldflags & ~clear) | set;
2267
if (ioctl(myfd, EXT2_IOC_SETFLAGS, &newflags) >= 0)
2272
/* If we couldn't set all the flags, try again with a subset. */
2273
if (ioctl(myfd, EXT2_IOC_GETFLAGS, &oldflags) >= 0) {
2274
newflags &= ~sf_mask;
2275
oldflags &= sf_mask;
2276
newflags |= oldflags;
2277
if (ioctl(myfd, EXT2_IOC_SETFLAGS, &newflags) >= 0)
2280
/* We couldn't set the flags, so report the failure. */
2282
archive_set_error(&a->archive, errno,
2283
"Failed to set file flags");
2294
* Of course, some systems have neither BSD chflags() nor Linux' flags
2295
* support through ioctl().
2298
set_fflags_platform(struct archive_write_disk *a, int fd, const char *name,
2299
mode_t mode, unsigned long set, unsigned long clear)
2301
(void)a; /* UNUSED */
2302
(void)fd; /* UNUSED */
2303
(void)name; /* UNUSED */
2304
(void)mode; /* UNUSED */
2305
(void)set; /* UNUSED */
2306
(void)clear; /* UNUSED */
2307
return (ARCHIVE_OK);
2310
#endif /* __linux */
2312
#ifndef HAVE_POSIX_ACL
2313
/* Default empty function body to satisfy mainline code. */
2315
set_acls(struct archive_write_disk *a)
2317
(void)a; /* UNUSED */
2318
return (ARCHIVE_OK);
2324
* XXX TODO: What about ACL types other than ACCESS and DEFAULT?
2327
set_acls(struct archive_write_disk *a)
2331
ret = set_acl(a, a->fd, a->entry, ACL_TYPE_ACCESS,
2332
ARCHIVE_ENTRY_ACL_TYPE_ACCESS, "access");
2333
if (ret != ARCHIVE_OK)
2335
ret = set_acl(a, a->fd, a->entry, ACL_TYPE_DEFAULT,
2336
ARCHIVE_ENTRY_ACL_TYPE_DEFAULT, "default");
2342
set_acl(struct archive_write_disk *a, int fd, struct archive_entry *entry,
2343
acl_type_t acl_type, int ae_requested_type, const char *tname)
2346
acl_entry_t acl_entry;
2347
acl_permset_t acl_permset;
2349
int ae_type, ae_permset, ae_tag, ae_id;
2352
const char *ae_name;
2357
entries = archive_entry_acl_reset(entry, ae_requested_type);
2359
return (ARCHIVE_OK);
2360
acl = acl_init(entries);
2361
while (archive_entry_acl_next(entry, ae_requested_type, &ae_type,
2362
&ae_permset, &ae_tag, &ae_id, &ae_name) == ARCHIVE_OK) {
2363
acl_create_entry(&acl, &acl_entry);
2366
case ARCHIVE_ENTRY_ACL_USER:
2367
acl_set_tag_type(acl_entry, ACL_USER);
2368
ae_uid = a->lookup_uid(a->lookup_uid_data,
2370
acl_set_qualifier(acl_entry, &ae_uid);
2372
case ARCHIVE_ENTRY_ACL_GROUP:
2373
acl_set_tag_type(acl_entry, ACL_GROUP);
2374
ae_gid = a->lookup_gid(a->lookup_gid_data,
2376
acl_set_qualifier(acl_entry, &ae_gid);
2378
case ARCHIVE_ENTRY_ACL_USER_OBJ:
2379
acl_set_tag_type(acl_entry, ACL_USER_OBJ);
2381
case ARCHIVE_ENTRY_ACL_GROUP_OBJ:
2382
acl_set_tag_type(acl_entry, ACL_GROUP_OBJ);
2384
case ARCHIVE_ENTRY_ACL_MASK:
2385
acl_set_tag_type(acl_entry, ACL_MASK);
2387
case ARCHIVE_ENTRY_ACL_OTHER:
2388
acl_set_tag_type(acl_entry, ACL_OTHER);
2395
acl_get_permset(acl_entry, &acl_permset);
2396
acl_clear_perms(acl_permset);
2397
if (ae_permset & ARCHIVE_ENTRY_ACL_EXECUTE)
2398
acl_add_perm(acl_permset, ACL_EXECUTE);
2399
if (ae_permset & ARCHIVE_ENTRY_ACL_WRITE)
2400
acl_add_perm(acl_permset, ACL_WRITE);
2401
if (ae_permset & ARCHIVE_ENTRY_ACL_READ)
2402
acl_add_perm(acl_permset, ACL_READ);
2405
name = archive_entry_pathname(entry);
2407
/* Try restoring the ACL through 'fd' if we can. */
2409
if (fd >= 0 && acl_type == ACL_TYPE_ACCESS && acl_set_fd(fd, acl) == 0)
2413
#if HAVE_ACL_SET_FD_NP
2414
if (fd >= 0 && acl_set_fd_np(fd, acl, acl_type) == 0)
2419
if (acl_set_file(name, acl_type, acl) != 0) {
2420
archive_set_error(&a->archive, errno, "Failed to set %s acl", tname);
2430
* Restore extended attributes - Linux implementation
2433
set_xattrs(struct archive_write_disk *a)
2435
struct archive_entry *entry = a->entry;
2436
static int warning_done = 0;
2437
int ret = ARCHIVE_OK;
2438
int i = archive_entry_xattr_reset(entry);
2444
archive_entry_xattr_next(entry, &name, &value, &size);
2446
strncmp(name, "xfsroot.", 8) != 0 &&
2447
strncmp(name, "system.", 7) != 0) {
2451
e = fsetxattr(a->fd, name, value, size, 0);
2455
e = lsetxattr(archive_entry_pathname(entry),
2456
name, value, size, 0);
2459
if (errno == ENOTSUP) {
2460
if (!warning_done) {
2462
archive_set_error(&a->archive, errno,
2463
"Cannot restore extended "
2464
"attributes on this file "
2468
archive_set_error(&a->archive, errno,
2469
"Failed to set extended attribute");
2473
archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2474
"Invalid extended attribute encountered");
2480
#elif HAVE_EXTATTR_SET_FILE && HAVE_DECL_EXTATTR_NAMESPACE_USER
2482
* Restore extended attributes - FreeBSD implementation
2485
set_xattrs(struct archive_write_disk *a)
2487
struct archive_entry *entry = a->entry;
2488
static int warning_done = 0;
2489
int ret = ARCHIVE_OK;
2490
int i = archive_entry_xattr_reset(entry);
2496
archive_entry_xattr_next(entry, &name, &value, &size);
2501
if (strncmp(name, "user.", 5) == 0) {
2502
/* "user." attributes go to user namespace */
2504
namespace = EXTATTR_NAMESPACE_USER;
2506
/* Warn about other extended attributes. */
2507
archive_set_error(&a->archive,
2508
ARCHIVE_ERRNO_FILE_FORMAT,
2509
"Can't restore extended attribute ``%s''",
2515
#if HAVE_EXTATTR_SET_FD
2517
e = extattr_set_fd(a->fd, namespace, name, value, size);
2520
/* TODO: should we use extattr_set_link() instead? */
2522
e = extattr_set_file(archive_entry_pathname(entry),
2523
namespace, name, value, size);
2525
if (e != (int)size) {
2526
if (errno == ENOTSUP) {
2527
if (!warning_done) {
2529
archive_set_error(&a->archive, errno,
2530
"Cannot restore extended "
2531
"attributes on this file "
2535
archive_set_error(&a->archive, errno,
2536
"Failed to set extended attribute");
2547
* Restore extended attributes - stub implementation for unsupported systems
2550
set_xattrs(struct archive_write_disk *a)
2552
static int warning_done = 0;
2554
/* If there aren't any extended attributes, then it's okay not
2555
* to extract them, otherwise, issue a single warning. */
2556
if (archive_entry_xattr_count(a->entry) != 0 && !warning_done) {
2558
archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2559
"Cannot restore extended attributes on this system");
2560
return (ARCHIVE_WARN);
2562
/* Warning was already emitted; suppress further warnings. */
2563
return (ARCHIVE_OK);
2569
* Trivial implementations of gid/uid lookup functions.
2570
* These are normally overridden by the client, but these stub
2571
* versions ensure that we always have something that works.
2574
trivial_lookup_gid(void *private_data, const char *gname, gid_t gid)
2576
(void)private_data; /* UNUSED */
2577
(void)gname; /* UNUSED */
2582
trivial_lookup_uid(void *private_data, const char *uname, uid_t uid)
2584
(void)private_data; /* UNUSED */
2585
(void)uname; /* UNUSED */
2590
* Test if file on disk is older than entry.
2593
older(struct stat *st, struct archive_entry *entry)
2595
/* First, test the seconds and return if we have a definite answer. */
2596
/* Definitely older. */
2597
if (st->st_mtime < archive_entry_mtime(entry))
2599
/* Definitely younger. */
2600
if (st->st_mtime > archive_entry_mtime(entry))
2602
/* If this platform supports fractional seconds, try those. */
2603
#if HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC
2604
/* Definitely older. */
2605
if (st->st_mtimespec.tv_nsec < archive_entry_mtime_nsec(entry))
2607
#elif HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
2608
/* Definitely older. */
2609
if (st->st_mtim.tv_nsec < archive_entry_mtime_nsec(entry))
2611
#elif HAVE_STRUCT_STAT_ST_MTIME_N
2613
if (st->st_mtime_n < archive_entry_mtime_nsec(entry))
2615
#elif HAVE_STRUCT_STAT_ST_UMTIME
2617
if (st->st_umtime * 1000 < archive_entry_mtime_nsec(entry))
2619
#elif HAVE_STRUCT_STAT_ST_MTIME_USEC
2621
if (st->st_mtime_usec * 1000 < archive_entry_mtime_nsec(entry))
2624
/* This system doesn't have high-res timestamps. */
2626
/* Same age or newer, so not older. */
added
removed
src/libarchive/libarchive/archive_write_disk.c
