2 * Copyright (c) 2003-2010 Tim Kientzle
3 * Copyright (c) 2011-2012 Michihiro NAKAJIMA
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer
11 * in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 #include "archive_platform.h"
29 __FBSDID("$FreeBSD$");
31 #if defined(_WIN32) && !defined(__CYGWIN__)
33 #ifdef HAVE_SYS_TYPES_H
34 #include <sys/types.h>
36 #ifdef HAVE_SYS_UTIME_H
37 #include <sys/utime.h>
53 /* TODO: Support Mac OS 'quarantine' feature. This is really just a
54 * standard tag to mark files that have been downloaded as "tainted".
55 * On Mac OS, we should mark the extracted files as tainted if the
56 * archive being read was tainted. Windows has a similar feature; we
57 * should investigate ways to support this generically. */
60 #include "archive_acl_private.h"
61 #include "archive_string.h"
62 #include "archive_entry.h"
63 #include "archive_private.h"
68 #ifndef IO_REPARSE_TAG_SYMLINK
69 /* Old SDKs do not provide IO_REPARSE_TAG_SYMLINK */
70 #define IO_REPARSE_TAG_SYMLINK 0xA000000CL
73 static BOOL SetFilePointerEx_perso(HANDLE hFile,
74 LARGE_INTEGER liDistanceToMove,
75 PLARGE_INTEGER lpNewFilePointer,
79 li.QuadPart = liDistanceToMove.QuadPart;
80 li.LowPart = SetFilePointer(
81 hFile, li.LowPart, &li.HighPart, dwMoveMethod);
82 if(lpNewFilePointer) {
83 lpNewFilePointer->QuadPart = li.QuadPart;
85 return li.LowPart != (DWORD)-1 || GetLastError() == NO_ERROR;
89 struct fixup_entry *next;
90 struct archive_acl acl;
96 unsigned long atime_nanos;
97 unsigned long birthtime_nanos;
98 unsigned long mtime_nanos;
99 unsigned long ctime_nanos;
100 unsigned long fflags_set;
101 int fixup; /* bitmask of what needs fixing */
106 * We use a bitmask to track which operations remain to be done for
107 * this file. In particular, this helps us avoid unnecessary
108 * operations when it's possible to take care of one step as a
109 * side-effect of another. For example, mkdir() can specify the mode
110 * for the newly-created object but symlink() cannot. This means we
111 * can skip chmod() if mkdir() succeeded, but we must explicitly
112 * chmod() if we're trying to create a directory that already exists
113 * (mkdir() failed) or if we're restoring a symlink. Similarly, we
114 * need to verify UID/GID before trying to restore SUID/SGID bits;
115 * that verification can occur explicitly through a stat() call or
116 * implicitly because of a successful chown() call.
118 #define TODO_MODE_FORCE 0x40000000
119 #define TODO_MODE_BASE 0x20000000
120 #define TODO_SUID 0x10000000
121 #define TODO_SUID_CHECK 0x08000000
122 #define TODO_SGID 0x04000000
123 #define TODO_SGID_CHECK 0x02000000
124 #define TODO_MODE (TODO_MODE_BASE|TODO_SUID|TODO_SGID)
125 #define TODO_TIMES ARCHIVE_EXTRACT_TIME
126 #define TODO_OWNER ARCHIVE_EXTRACT_OWNER
127 #define TODO_FFLAGS ARCHIVE_EXTRACT_FFLAGS
128 #define TODO_ACLS ARCHIVE_EXTRACT_ACL
129 #define TODO_XATTR ARCHIVE_EXTRACT_XATTR
130 #define TODO_MAC_METADATA ARCHIVE_EXTRACT_MAC_METADATA
132 struct archive_write_disk {
133 struct archive archive;
136 struct fixup_entry *fixup_list;
137 struct fixup_entry *current_fixup;
140 int64_t skip_file_dev;
141 int64_t skip_file_ino;
144 int64_t (*lookup_gid)(void *private, const char *gname, int64_t gid);
145 void (*cleanup_gid)(void *private);
146 void *lookup_gid_data;
147 int64_t (*lookup_uid)(void *private, const char *uname, int64_t uid);
148 void (*cleanup_uid)(void *private);
149 void *lookup_uid_data;
152 * Full path of last file to satisfy symlink checks.
154 struct archive_wstring path_safe;
157 * Cached stat data from disk for the current entry.
158 * If this is valid, pst points to st. Otherwise,
161 BY_HANDLE_FILE_INFORMATION st;
162 BY_HANDLE_FILE_INFORMATION *pst;
164 /* Information about the object being restored right now. */
165 struct archive_entry *entry; /* Entry being extracted. */
166 wchar_t *name; /* Name of entry, possibly edited. */
167 struct archive_wstring _name_data; /* backing store for 'name' */
168 /* Tasks remaining for this object. */
170 /* Tasks deferred until end-of-archive. */
172 /* Options requested by the client. */
174 /* Handle for the file we're restoring. */
176 /* Current offset for writing data to the file. */
178 /* Last offset actually written to disk. */
180 /* Total bytes actually written to files. */
181 int64_t total_bytes_written;
182 /* Maximum size of file, -1 if unknown. */
184 /* Dir we were in before this restore; only for deep paths. */
186 /* Mode we should use for this entry; affected by _PERM and umask. */
188 /* UID/GID to use in restoring this entry. */
194 * Default mode for dirs created automatically (will be modified by umask).
195 * Note that POSIX specifies 0777 for implicity-created dirs, "modified
196 * by the process' file creation mask."
198 #define DEFAULT_DIR_MODE 0777
200 * Dir modes are restored in two steps: During the extraction, the permissions
201 * in the archive are modified to match the following limits. During
202 * the post-extract fixup pass, the permissions from the archive are
205 #define MINIMUM_DIR_MODE 0700
206 #define MAXIMUM_DIR_MODE 0775
208 static int check_symlinks(struct archive_write_disk *);
209 static int create_filesystem_object(struct archive_write_disk *);
210 static struct fixup_entry *current_fixup(struct archive_write_disk *,
211 const wchar_t *pathname);
212 static int cleanup_pathname(struct archive_write_disk *);
213 static int create_dir(struct archive_write_disk *, wchar_t *);
214 static int create_parent_dir(struct archive_write_disk *, wchar_t *);
215 static int la_chmod(const wchar_t *, mode_t);
216 static int older(BY_HANDLE_FILE_INFORMATION *, struct archive_entry *);
217 static int permissive_name_w(struct archive_write_disk *);
218 static int restore_entry(struct archive_write_disk *);
219 static int set_acls(struct archive_write_disk *, HANDLE h,
220 const wchar_t *, struct archive_acl *);
221 static int set_xattrs(struct archive_write_disk *);
222 static int set_fflags(struct archive_write_disk *);
223 static int set_ownership(struct archive_write_disk *);
224 static int set_mode(struct archive_write_disk *, int mode);
225 static int set_times(struct archive_write_disk *, HANDLE, int,
226 const wchar_t *, time_t, long, time_t, long, time_t,
228 static int set_times_from_entry(struct archive_write_disk *);
229 static struct fixup_entry *sort_dir_list(struct fixup_entry *p);
230 static ssize_t write_data_block(struct archive_write_disk *,
231 const char *, size_t);
233 static struct archive_vtable *archive_write_disk_vtable(void);
235 static int _archive_write_disk_close(struct archive *);
236 static int _archive_write_disk_free(struct archive *);
237 static int _archive_write_disk_header(struct archive *,
238 struct archive_entry *);
239 static int64_t _archive_write_disk_filter_bytes(struct archive *, int);
240 static int _archive_write_disk_finish_entry(struct archive *);
241 static ssize_t _archive_write_disk_data(struct archive *, const void *,
243 static ssize_t _archive_write_disk_data_block(struct archive *, const void *,
246 #define bhfi_dev(bhfi) ((bhfi)->dwVolumeSerialNumber)
247 /* Treat FileIndex as i-node. We should remove a sequence number
248 * which is high-16-bits of nFileIndexHigh. */
249 #define bhfi_ino(bhfi) \
250 ((((int64_t)((bhfi)->nFileIndexHigh & 0x0000FFFFUL)) << 32) \
251 + (bhfi)->nFileIndexLow)
252 #define bhfi_size(bhfi) \
253 ((((int64_t)(bhfi)->nFileSizeHigh) << 32) + (bhfi)->nFileSizeLow)
256 file_information(struct archive_write_disk *a, wchar_t *path,
257 BY_HANDLE_FILE_INFORMATION *st, mode_t *mode, int sim_lstat)
261 DWORD flag = FILE_FLAG_BACKUP_SEMANTICS;
262 WIN32_FIND_DATAW findData;
264 if (sim_lstat || mode != NULL) {
265 h = FindFirstFileW(path, &findData);
266 if (h == INVALID_HANDLE_VALUE &&
267 GetLastError() == ERROR_INVALID_NAME) {
269 full = __la_win_permissive_name_w(path);
270 h = FindFirstFileW(full, &findData);
273 if (h == INVALID_HANDLE_VALUE) {
274 la_dosmaperr(GetLastError());
280 /* Is symlink file ? */
282 ((findData.dwFileAttributes
283 & FILE_ATTRIBUTE_REPARSE_POINT) &&
284 (findData.dwReserved0 == IO_REPARSE_TAG_SYMLINK)))
285 flag |= FILE_FLAG_OPEN_REPARSE_POINT;
287 h = CreateFileW(a->name, 0, 0, NULL,
288 OPEN_EXISTING, flag, NULL);
289 if (h == INVALID_HANDLE_VALUE &&
290 GetLastError() == ERROR_INVALID_NAME) {
292 full = __la_win_permissive_name_w(path);
293 h = CreateFileW(full, 0, 0, NULL,
294 OPEN_EXISTING, flag, NULL);
297 if (h == INVALID_HANDLE_VALUE) {
298 la_dosmaperr(GetLastError());
301 r = GetFileInformationByHandle(h, st);
304 la_dosmaperr(GetLastError());
311 *mode = S_IRUSR | S_IRGRP | S_IROTH;
312 if ((st->dwFileAttributes & FILE_ATTRIBUTE_READONLY) == 0)
313 *mode |= S_IWUSR | S_IWGRP | S_IWOTH;
314 if ((st->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
315 findData.dwReserved0 == IO_REPARSE_TAG_SYMLINK)
317 else if (st->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
318 *mode |= S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH;
323 p = wcsrchr(path, L'.');
324 if (p != NULL && wcslen(p) == 4) {
326 case L'B': case L'b':
327 if ((p[2] == L'A' || p[2] == L'a' ) &&
328 (p[3] == L'T' || p[3] == L't' ))
329 *mode |= S_IXUSR | S_IXGRP | S_IXOTH;
331 case L'C': case L'c':
332 if (((p[2] == L'M' || p[2] == L'm' ) &&
333 (p[3] == L'D' || p[3] == L'd' )) ||
334 ((p[2] == L'M' || p[2] == L'm' ) &&
335 (p[3] == L'D' || p[3] == L'd' )))
336 *mode |= S_IXUSR | S_IXGRP | S_IXOTH;
338 case L'E': case L'e':
339 if ((p[2] == L'X' || p[2] == L'x' ) &&
340 (p[3] == L'E' || p[3] == L'e' ))
341 *mode |= S_IXUSR | S_IXGRP | S_IXOTH;
352 * Note: The path, for example, "aa/a/../b../c" will be converted to "aa/c"
353 * by GetFullPathNameW() W32 API, which __la_win_permissive_name_w uses.
354 * It means we cannot handle multiple dirs in one archive_entry.
355 * So we have to make the full-pathname in another way, which does not
356 * break "../" path string.
359 permissive_name_w(struct archive_write_disk *a)
366 if (wnp[0] == L'\\' && wnp[1] == L'\\' &&
367 wnp[2] == L'?' && wnp[3] == L'\\')
368 /* We have already a permissive name. */
371 if (wnp[0] == L'\\' && wnp[1] == L'\\' &&
372 wnp[2] == L'.' && wnp[3] == L'\\') {
373 /* This is a device name */
374 if (((wnp[4] >= L'a' && wnp[4] <= L'z') ||
375 (wnp[4] >= L'A' && wnp[4] <= L'Z')) &&
376 wnp[5] == L':' && wnp[6] == L'\\') {
377 wnp[2] = L'?';/* Not device name. */
383 * A full-pathname starting with a drive name like "C:\abc".
385 if (((wnp[0] >= L'a' && wnp[0] <= L'z') ||
386 (wnp[0] >= L'A' && wnp[0] <= L'Z')) &&
387 wnp[1] == L':' && wnp[2] == L'\\') {
391 archive_wstring_ensure(&(a->_name_data), 4 + wcslen(wn) + 1);
392 a->name = a->_name_data.s;
394 archive_wstrncpy(&(a->_name_data), L"\\\\?\\", 4);
395 archive_wstrcat(&(a->_name_data), wn);
401 * A full-pathname pointig a network drive
402 * like "\\<server-name>\<share-name>\file".
404 if (wnp[0] == L'\\' && wnp[1] == L'\\' && wnp[2] != L'\\') {
405 const wchar_t *p = &wnp[2];
407 /* Skip server-name letters. */
408 while (*p != L'\\' && *p != L'\0')
411 const wchar_t *rp = ++p;
412 /* Skip share-name letters. */
413 while (*p != L'\\' && *p != L'\0')
415 if (*p == L'\\' && p != rp) {
416 /* Now, match patterns such as
417 * "\\server-name\share-name\" */
421 archive_wstring_ensure(&(a->_name_data),
423 a->name = a->_name_data.s;
424 /* Prepend "\\?\UNC\" */
425 archive_wstrncpy(&(a->_name_data),
427 archive_wstrcat(&(a->_name_data), wn+2);
436 * Get current working directory.
438 l = GetCurrentDirectoryW(0, NULL);
441 ws = malloc(l * sizeof(wchar_t));
442 l = GetCurrentDirectoryW(l, ws);
450 * A full-pathname starting without a drive name like "\abc".
452 if (wnp[0] == L'\\') {
456 archive_wstring_ensure(&(a->_name_data),
457 4 + 2 + wcslen(wn) + 1);
458 a->name = a->_name_data.s;
459 /* Prepend "\\?\" and drive name. */
460 archive_wstrncpy(&(a->_name_data), L"\\\\?\\", 4);
461 archive_wstrncat(&(a->_name_data), wsp, 2);
462 archive_wstrcat(&(a->_name_data), wn);
471 archive_wstring_ensure(&(a->_name_data), 4 + l + 1 + wcslen(wn) + 1);
472 a->name = a->_name_data.s;
473 /* Prepend "\\?\" and drive name. */
474 archive_wstrncpy(&(a->_name_data), L"\\\\?\\", 4);
475 archive_wstrncat(&(a->_name_data), wsp, l);
476 archive_wstrncat(&(a->_name_data), L"\\", 1);
477 archive_wstrcat(&(a->_name_data), wn);
478 a->name = a->_name_data.s;
485 la_chmod(const wchar_t *path, mode_t mode)
493 attr = GetFileAttributesW(path);
494 if (attr == (DWORD)-1 &&
495 GetLastError() == ERROR_INVALID_NAME) {
496 fullname = __la_win_permissive_name_w(path);
497 attr = GetFileAttributesW(fullname);
499 if (attr == (DWORD)-1) {
500 la_dosmaperr(GetLastError());
504 if (mode & _S_IWRITE)
505 attr &= ~FILE_ATTRIBUTE_READONLY;
507 attr |= FILE_ATTRIBUTE_READONLY;
508 if (fullname != NULL)
509 r = SetFileAttributesW(fullname, attr);
511 r = SetFileAttributesW(path, attr);
513 la_dosmaperr(GetLastError());
522 la_GetFunctionKernel32(const char *name)
524 static HINSTANCE lib;
528 lib = LoadLibrary("kernel32.dll");
531 fprintf(stderr, "Can't load kernel32.dll?!\n");
534 return (void *)GetProcAddress(lib, name);
538 la_CreateHardLinkW(wchar_t *linkname, wchar_t *target)
540 static BOOLEAN (WINAPI *f)(LPWSTR, LPWSTR, LPSECURITY_ATTRIBUTES);
546 f = la_GetFunctionKernel32("CreateHardLinkW");
550 ret = (*f)(linkname, target, NULL);
552 /* Under windows 2000, it is necessary to remove
553 * the "\\?\" prefix. */
554 #define IS_UNC(name) ((name[0] == L'U' || name[0] == L'u') && \
555 (name[1] == L'N' || name[1] == L'n') && \
556 (name[2] == L'C' || name[2] == L'c') && \
558 if (!wcsncmp(linkname,L"\\\\?\\", 4)) {
560 if (IS_UNC(linkname))
563 if (!wcsncmp(target,L"\\\\?\\", 4)) {
569 ret = (*f)(linkname, target, NULL);
575 la_ftruncate(HANDLE handle, int64_t length)
577 LARGE_INTEGER distance;
579 if (GetFileType(handle) != FILE_TYPE_DISK) {
583 distance.QuadPart = length;
584 if (!SetFilePointerEx_perso(handle, distance, NULL, FILE_BEGIN)) {
585 la_dosmaperr(GetLastError());
588 if (!SetEndOfFile(handle)) {
589 la_dosmaperr(GetLastError());
596 lazy_stat(struct archive_write_disk *a)
598 if (a->pst != NULL) {
599 /* Already have stat() data available. */
602 if (a->fh != INVALID_HANDLE_VALUE &&
603 GetFileInformationByHandle(a->fh, &a->st) == 0) {
609 * XXX At this point, symlinks should not be hit, otherwise
610 * XXX a race occurred. Do we want to check explicitly for that?
612 if (file_information(a, a->name, &a->st, NULL, 1) == 0) {
616 archive_set_error(&a->archive, errno, "Couldn't stat file");
617 return (ARCHIVE_WARN);
620 static struct archive_vtable *
621 archive_write_disk_vtable(void)
623 static struct archive_vtable av;
624 static int inited = 0;
627 av.archive_close = _archive_write_disk_close;
628 av.archive_filter_bytes = _archive_write_disk_filter_bytes;
629 av.archive_free = _archive_write_disk_free;
630 av.archive_write_header = _archive_write_disk_header;
631 av.archive_write_finish_entry
632 = _archive_write_disk_finish_entry;
633 av.archive_write_data = _archive_write_disk_data;
634 av.archive_write_data_block = _archive_write_disk_data_block;
641 _archive_write_disk_filter_bytes(struct archive *_a, int n)
643 struct archive_write_disk *a = (struct archive_write_disk *)_a;
644 (void)n; /* UNUSED */
645 if (n == -1 || n == 0)
646 return (a->total_bytes_written);
652 archive_write_disk_set_options(struct archive *_a, int flags)
654 struct archive_write_disk *a = (struct archive_write_disk *)_a;
662 * Extract this entry to disk.
664 * TODO: Validate hardlinks. According to the standards, we're
665 * supposed to check each extracted hardlink and squawk if it refers
666 * to a file that we didn't restore. I'm not entirely convinced this
667 * is a good idea, but more importantly: Is there any way to validate
668 * hardlinks without keeping a complete list of filenames from the
669 * entire archive?? Ugh.
673 _archive_write_disk_header(struct archive *_a, struct archive_entry *entry)
675 struct archive_write_disk *a = (struct archive_write_disk *)_a;
676 struct fixup_entry *fe;
679 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
680 ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
681 "archive_write_disk_header");
682 archive_clear_error(&a->archive);
683 if (a->archive.state & ARCHIVE_STATE_DATA) {
684 r = _archive_write_disk_finish_entry(&a->archive);
685 if (r == ARCHIVE_FATAL)
689 /* Set up for this particular entry. */
691 a->current_fixup = NULL;
694 archive_entry_free(a->entry);
697 a->entry = archive_entry_clone(entry);
698 a->fh = INVALID_HANDLE_VALUE;
702 a->uid = a->user_uid;
703 a->mode = archive_entry_mode(a->entry);
704 if (archive_entry_size_is_set(a->entry))
705 a->filesize = archive_entry_size(a->entry);
708 archive_wstrcpy(&(a->_name_data), archive_entry_pathname_w(a->entry));
709 a->name = a->_name_data.s;
710 archive_clear_error(&a->archive);
713 * Clean up the requested path. This is necessary for correct
714 * dir restores; the dir restore logic otherwise gets messed
715 * up by nonsense like "dir/.".
717 ret = cleanup_pathname(a);
718 if (ret != ARCHIVE_OK)
722 * Generate a full-pathname and use it from here.
724 if (permissive_name_w(a) < 0) {
726 return (ARCHIVE_FAILED);
730 * Query the umask so we get predictable mode settings.
731 * This gets done on every call to _write_header in case the
732 * user edits their umask during the extraction for some
735 umask(a->user_umask = umask(0));
737 /* Figure out what we need to do for this entry. */
738 a->todo = TODO_MODE_BASE;
739 if (a->flags & ARCHIVE_EXTRACT_PERM) {
740 a->todo |= TODO_MODE_FORCE; /* Be pushy about permissions. */
742 * SGID requires an extra "check" step because we
743 * cannot easily predict the GID that the system will
744 * assign. (Different systems assign GIDs to files
745 * based on a variety of criteria, including process
746 * credentials and the gid of the enclosing
747 * directory.) We can only restore the SGID bit if
748 * the file has the right GID, and we only know the
749 * GID if we either set it (see set_ownership) or if
750 * we've actually called stat() on the file after it
751 * was restored. Since there are several places at
752 * which we might verify the GID, we need a TODO bit
755 if (a->mode & S_ISGID)
756 a->todo |= TODO_SGID | TODO_SGID_CHECK;
758 * Verifying the SUID is simpler, but can still be
759 * done in multiple ways, hence the separate "check" bit.
761 if (a->mode & S_ISUID)
762 a->todo |= TODO_SUID | TODO_SUID_CHECK;
765 * User didn't request full permissions, so don't
766 * restore SUID, SGID bits and obey umask.
771 a->mode &= ~a->user_umask;
774 if (a->flags & ARCHIVE_EXTRACT_OWNER)
775 a->todo |= TODO_OWNER;
777 if (a->flags & ARCHIVE_EXTRACT_TIME)
778 a->todo |= TODO_TIMES;
779 if (a->flags & ARCHIVE_EXTRACT_ACL) {
780 if (archive_entry_filetype(a->entry) == AE_IFDIR)
781 a->deferred |= TODO_ACLS;
783 a->todo |= TODO_ACLS;
785 if (a->flags & ARCHIVE_EXTRACT_XATTR)
786 a->todo |= TODO_XATTR;
787 if (a->flags & ARCHIVE_EXTRACT_FFLAGS)
788 a->todo |= TODO_FFLAGS;
789 if (a->flags & ARCHIVE_EXTRACT_SECURE_SYMLINKS) {
790 ret = check_symlinks(a);
791 if (ret != ARCHIVE_OK)
795 ret = restore_entry(a);
798 * TODO: There are rumours that some extended attributes must
799 * be restored before file data is written. If this is true,
800 * then we either need to write all extended attributes both
801 * before and after restoring the data, or find some rule for
802 * determining which must go first and which last. Due to the
803 * many ways people are using xattrs, this may prove to be an
804 * intractable problem.
808 * Fixup uses the unedited pathname from archive_entry_pathname(),
809 * because it is relative to the base dir and the edited path
810 * might be relative to some intermediate dir as a result of the
811 * deep restore logic.
813 if (a->deferred & TODO_MODE) {
814 fe = current_fixup(a, archive_entry_pathname_w(entry));
815 fe->fixup |= TODO_MODE_BASE;
819 if ((a->deferred & TODO_TIMES)
820 && (archive_entry_mtime_is_set(entry)
821 || archive_entry_atime_is_set(entry))) {
822 fe = current_fixup(a, archive_entry_pathname_w(entry));
824 fe->fixup |= TODO_TIMES;
825 if (archive_entry_atime_is_set(entry)) {
826 fe->atime = archive_entry_atime(entry);
827 fe->atime_nanos = archive_entry_atime_nsec(entry);
829 /* If atime is unset, use start time. */
830 fe->atime = a->start_time;
833 if (archive_entry_mtime_is_set(entry)) {
834 fe->mtime = archive_entry_mtime(entry);
835 fe->mtime_nanos = archive_entry_mtime_nsec(entry);
837 /* If mtime is unset, use start time. */
838 fe->mtime = a->start_time;
841 if (archive_entry_birthtime_is_set(entry)) {
842 fe->birthtime = archive_entry_birthtime(entry);
843 fe->birthtime_nanos = archive_entry_birthtime_nsec(entry);
845 /* If birthtime is unset, use mtime. */
846 fe->birthtime = fe->mtime;
847 fe->birthtime_nanos = fe->mtime_nanos;
851 if (a->deferred & TODO_ACLS) {
852 fe = current_fixup(a, archive_entry_pathname_w(entry));
853 archive_acl_copy(&fe->acl, archive_entry_acl(entry));
856 if (a->deferred & TODO_FFLAGS) {
857 fe = current_fixup(a, archive_entry_pathname_w(entry));
858 fe->fixup |= TODO_FFLAGS;
859 /* TODO: Complete this.. defer fflags from below. */
863 * On Windows, A creating sparse file requires a special mark.
865 if (a->fh != INVALID_HANDLE_VALUE &&
866 archive_entry_sparse_count(entry) > 0) {
867 int64_t base = 0, offset, length;
868 int i, cnt = archive_entry_sparse_reset(entry);
871 for (i = 0; i < cnt; i++) {
872 archive_entry_sparse_next(entry, &offset, &length);
873 if (offset - base >= 4096) {
874 sparse = 1;/* we have a hole. */
877 base = offset + length;
881 /* Mark this file as sparse. */
882 DeviceIoControl(a->fh, FSCTL_SET_SPARSE,
883 NULL, 0, NULL, 0, &dmy, NULL);
887 /* We've created the object and are ready to pour data into it. */
888 if (ret >= ARCHIVE_WARN)
889 a->archive.state = ARCHIVE_STATE_DATA;
891 * If it's not open, tell our client not to try writing.
892 * In particular, dirs, links, etc, don't get written to.
894 if (a->fh == INVALID_HANDLE_VALUE) {
895 archive_entry_set_size(entry, 0);
903 archive_write_disk_set_skip_file(struct archive *_a, int64_t d, int64_t i)
905 struct archive_write_disk *a = (struct archive_write_disk *)_a;
906 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
907 ARCHIVE_STATE_ANY, "archive_write_disk_set_skip_file");
908 a->skip_file_set = 1;
909 a->skip_file_dev = d;
910 a->skip_file_ino = i;
915 write_data_block(struct archive_write_disk *a, const char *buff, size_t size)
918 uint64_t start_size = size;
919 DWORD bytes_written = 0;
920 ssize_t block_size = 0, bytes_to_write;
925 if (a->filesize == 0 || a->fh == INVALID_HANDLE_VALUE) {
926 archive_set_error(&a->archive, 0,
927 "Attempt to write to an empty file");
928 return (ARCHIVE_WARN);
931 if (a->flags & ARCHIVE_EXTRACT_SPARSE) {
932 /* XXX TODO XXX Is there a more appropriate choice here ? */
933 /* This needn't match the filesystem allocation size. */
934 block_size = 16*1024;
937 /* If this write would run beyond the file size, truncate it. */
938 if (a->filesize >= 0 && (int64_t)(a->offset + size) > a->filesize)
939 start_size = size = (size_t)(a->filesize - a->offset);
941 /* Write the data. */
943 if (block_size == 0) {
944 bytes_to_write = size;
946 /* We're sparsifying the file. */
950 /* Skip leading zero bytes. */
951 for (p = buff, end = buff + size; p < end; ++p) {
955 a->offset += p - buff;
961 /* Calculate next block boundary after offset. */
963 = (a->offset / block_size + 1) * block_size;
965 /* If the adjusted write would cross block boundary,
966 * truncate it to the block boundary. */
967 bytes_to_write = size;
968 if (a->offset + bytes_to_write > block_end)
969 bytes_to_write = (DWORD)(block_end - a->offset);
971 memset(&ol, 0, sizeof(ol));
972 ol.Offset = (DWORD)(a->offset & 0xFFFFFFFF);
973 ol.OffsetHigh = (DWORD)(a->offset >> 32);
974 if (!WriteFile(a->fh, buff, (uint32_t)bytes_to_write,
975 &bytes_written, &ol)) {
978 lasterr = GetLastError();
979 if (lasterr == ERROR_ACCESS_DENIED)
982 la_dosmaperr(lasterr);
983 archive_set_error(&a->archive, errno, "Write failed");
984 return (ARCHIVE_WARN);
986 buff += bytes_written;
987 size -= bytes_written;
988 a->total_bytes_written += bytes_written;
989 a->offset += bytes_written;
990 a->fd_offset = a->offset;
992 return ((ssize_t)(start_size - size));
996 _archive_write_disk_data_block(struct archive *_a,
997 const void *buff, size_t size, int64_t offset)
999 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1002 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1003 ARCHIVE_STATE_DATA, "archive_write_data_block");
1006 r = write_data_block(a, buff, size);
1009 if ((size_t)r < size) {
1010 archive_set_error(&a->archive, 0,
1011 "Write request too large");
1012 return (ARCHIVE_WARN);
1014 return (ARCHIVE_OK);
1018 _archive_write_disk_data(struct archive *_a, const void *buff, size_t size)
1020 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1022 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1023 ARCHIVE_STATE_DATA, "archive_write_data");
1025 return (write_data_block(a, buff, size));
1029 _archive_write_disk_finish_entry(struct archive *_a)
1031 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1032 int ret = ARCHIVE_OK;
1034 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1035 ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
1036 "archive_write_finish_entry");
1037 if (a->archive.state & ARCHIVE_STATE_HEADER)
1038 return (ARCHIVE_OK);
1039 archive_clear_error(&a->archive);
1041 /* Pad or truncate file to the right size. */
1042 if (a->fh == INVALID_HANDLE_VALUE) {
1043 /* There's no file. */
1044 } else if (a->filesize < 0) {
1045 /* File size is unknown, so we can't set the size. */
1046 } else if (a->fd_offset == a->filesize) {
1047 /* Last write ended at exactly the filesize; we're done. */
1048 /* Hopefully, this is the common case. */
1050 if (la_ftruncate(a->fh, a->filesize) == -1) {
1051 archive_set_error(&a->archive, errno,
1052 "File size could not be restored");
1053 return (ARCHIVE_FAILED);
1057 /* Restore metadata. */
1060 * Look up the "real" UID only if we're going to need it.
1061 * TODO: the TODO_SGID condition can be dropped here, can't it?
1063 if (a->todo & (TODO_OWNER | TODO_SUID | TODO_SGID)) {
1064 a->uid = archive_write_disk_uid(&a->archive,
1065 archive_entry_uname(a->entry),
1066 archive_entry_uid(a->entry));
1068 /* Look up the "real" GID only if we're going to need it. */
1069 /* TODO: the TODO_SUID condition can be dropped here, can't it? */
1070 if (a->todo & (TODO_OWNER | TODO_SGID | TODO_SUID)) {
1071 a->gid = archive_write_disk_gid(&a->archive,
1072 archive_entry_gname(a->entry),
1073 archive_entry_gid(a->entry));
1077 * Restore ownership before set_mode tries to restore suid/sgid
1078 * bits. If we set the owner, we know what it is and can skip
1079 * a stat() call to examine the ownership of the file on disk.
1081 if (a->todo & TODO_OWNER)
1082 ret = set_ownership(a);
1085 * set_mode must precede ACLs on systems such as Solaris and
1086 * FreeBSD where setting the mode implicitly clears extended ACLs
1088 if (a->todo & TODO_MODE) {
1089 int r2 = set_mode(a, a->mode);
1090 if (r2 < ret) ret = r2;
1094 * Security-related extended attributes (such as
1095 * security.capability on Linux) have to be restored last,
1096 * since they're implicitly removed by other file changes.
1098 if (a->todo & TODO_XATTR) {
1099 int r2 = set_xattrs(a);
1100 if (r2 < ret) ret = r2;
1104 * Some flags prevent file modification; they must be restored after
1105 * file contents are written.
1107 if (a->todo & TODO_FFLAGS) {
1108 int r2 = set_fflags(a);
1109 if (r2 < ret) ret = r2;
1113 * Time must follow most other metadata;
1114 * otherwise atime will get changed.
1116 if (a->todo & TODO_TIMES) {
1117 int r2 = set_times_from_entry(a);
1118 if (r2 < ret) ret = r2;
1122 * ACLs must be restored after timestamps because there are
1123 * ACLs that prevent attribute changes (including time).
1125 if (a->todo & TODO_ACLS) {
1126 int r2 = set_acls(a, a->fh,
1127 archive_entry_pathname_w(a->entry),
1128 archive_entry_acl(a->entry));
1129 if (r2 < ret) ret = r2;
1132 /* If there's an fd, we can close it now. */
1133 if (a->fh != INVALID_HANDLE_VALUE) {
1135 a->fh = INVALID_HANDLE_VALUE;
1137 /* If there's an entry, we can release it now. */
1139 archive_entry_free(a->entry);
1142 a->archive.state = ARCHIVE_STATE_HEADER;
1147 archive_write_disk_set_group_lookup(struct archive *_a,
1149 int64_t (*lookup_gid)(void *private, const char *gname, int64_t gid),
1150 void (*cleanup_gid)(void *private))
1152 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1153 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1154 ARCHIVE_STATE_ANY, "archive_write_disk_set_group_lookup");
1156 if (a->cleanup_gid != NULL && a->lookup_gid_data != NULL)
1157 (a->cleanup_gid)(a->lookup_gid_data);
1159 a->lookup_gid = lookup_gid;
1160 a->cleanup_gid = cleanup_gid;
1161 a->lookup_gid_data = private_data;
1162 return (ARCHIVE_OK);
1166 archive_write_disk_set_user_lookup(struct archive *_a,
1168 int64_t (*lookup_uid)(void *private, const char *uname, int64_t uid),
1169 void (*cleanup_uid)(void *private))
1171 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1172 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1173 ARCHIVE_STATE_ANY, "archive_write_disk_set_user_lookup");
1175 if (a->cleanup_uid != NULL && a->lookup_uid_data != NULL)
1176 (a->cleanup_uid)(a->lookup_uid_data);
1178 a->lookup_uid = lookup_uid;
1179 a->cleanup_uid = cleanup_uid;
1180 a->lookup_uid_data = private_data;
1181 return (ARCHIVE_OK);
1185 archive_write_disk_gid(struct archive *_a, const char *name, int64_t id)
1187 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1188 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1189 ARCHIVE_STATE_ANY, "archive_write_disk_gid");
1191 return (a->lookup_gid)(a->lookup_gid_data, name, id);
1196 archive_write_disk_uid(struct archive *_a, const char *name, int64_t id)
1198 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1199 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1200 ARCHIVE_STATE_ANY, "archive_write_disk_uid");
1202 return (a->lookup_uid)(a->lookup_uid_data, name, id);
1207 * Create a new archive_write_disk object and initialize it with global state.
1210 archive_write_disk_new(void)
1212 struct archive_write_disk *a;
1214 a = (struct archive_write_disk *)malloc(sizeof(*a));
1217 memset(a, 0, sizeof(*a));
1218 a->archive.magic = ARCHIVE_WRITE_DISK_MAGIC;
1219 /* We're ready to write a header immediately. */
1220 a->archive.state = ARCHIVE_STATE_HEADER;
1221 a->archive.vtable = archive_write_disk_vtable();
1222 a->start_time = time(NULL);
1223 /* Query and restore the umask. */
1224 umask(a->user_umask = umask(0));
1225 if (archive_wstring_ensure(&a->path_safe, 512) == NULL) {
1229 return (&a->archive);
1233 disk_unlink(wchar_t *path)
1239 if (r != 0 && GetLastError() == ERROR_INVALID_NAME) {
1240 fullname = __la_win_permissive_name_w(path);
1241 r = _wunlink(fullname);
1248 disk_rmdir(wchar_t *path)
1254 if (r != 0 && GetLastError() == ERROR_INVALID_NAME) {
1255 fullname = __la_win_permissive_name_w(path);
1256 r = _wrmdir(fullname);
1263 * The main restore function.
1266 restore_entry(struct archive_write_disk *a)
1268 int ret = ARCHIVE_OK, en;
1270 if (a->flags & ARCHIVE_EXTRACT_UNLINK && !S_ISDIR(a->mode)) {
1272 * TODO: Fix this. Apparently, there are platforms
1273 * that still allow root to hose the entire filesystem
1274 * by unlinking a dir. The S_ISDIR() test above
1275 * prevents us from using unlink() here if the new
1276 * object is a dir, but that doesn't mean the old
1277 * object isn't a dir.
1279 if (disk_unlink(a->name) == 0) {
1280 /* We removed it, reset cached stat. */
1282 } else if (errno == ENOENT) {
1283 /* File didn't exist, that's just as good. */
1284 } else if (disk_rmdir(a->name) == 0) {
1285 /* It was a dir, but now it's gone. */
1288 /* We tried, but couldn't get rid of it. */
1289 archive_set_error(&a->archive, errno,
1290 "Could not unlink");
1291 return(ARCHIVE_FAILED);
1295 /* Try creating it first; if this fails, we'll try to recover. */
1296 en = create_filesystem_object(a);
1298 if ((en == ENOTDIR || en == ENOENT)
1299 && !(a->flags & ARCHIVE_EXTRACT_NO_AUTODIR)) {
1301 /* If the parent dir doesn't exist, try creating it. */
1302 create_parent_dir(a, a->name);
1303 /* Now try to create the object again. */
1304 full = __la_win_permissive_name_w(a->name);
1308 /* Remove multiple directories such as "a/../b../c" */
1309 archive_wstrcpy(&(a->_name_data), full);
1310 a->name = a->_name_data.s;
1312 en = create_filesystem_object(a);
1316 if ((en == EISDIR || en == EEXIST)
1317 && (a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
1318 /* If we're not overwriting, we're done. */
1319 archive_entry_unset_size(a->entry);
1320 return (ARCHIVE_OK);
1324 * Some platforms return EISDIR if you call
1325 * open(O_WRONLY | O_EXCL | O_CREAT) on a directory, some
1326 * return EEXIST. POSIX is ambiguous, requiring EISDIR
1327 * for open(O_WRONLY) on a dir and EEXIST for open(O_EXCL | O_CREAT)
1328 * on an existing item.
1331 /* A dir is in the way of a non-dir, rmdir it. */
1332 if (disk_rmdir(a->name) != 0) {
1333 archive_set_error(&a->archive, errno,
1334 "Can't remove already-existing dir");
1335 return (ARCHIVE_FAILED);
1339 en = create_filesystem_object(a);
1340 } else if (en == EEXIST) {
1343 * We know something is in the way, but we don't know what;
1344 * we need to find out before we go any further.
1348 * The SECURE_SYMLINK logic has already removed a
1349 * symlink to a dir if the client wants that. So
1350 * follow the symlink if we're creating a dir.
1352 if (S_ISDIR(a->mode))
1353 r = file_information(a, a->name, &a->st, &st_mode, 0);
1355 * If it's not a dir (or it's a broken symlink),
1356 * then don't follow it.
1358 if (r != 0 || !S_ISDIR(a->mode))
1359 r = file_information(a, a->name, &a->st, &st_mode, 1);
1361 archive_set_error(&a->archive, errno,
1362 "Can't stat existing object");
1363 return (ARCHIVE_FAILED);
1367 * NO_OVERWRITE_NEWER doesn't apply to directories.
1369 if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER)
1370 && !S_ISDIR(st_mode)) {
1371 if (!older(&(a->st), a->entry)) {
1372 archive_entry_unset_size(a->entry);
1373 return (ARCHIVE_OK);
1377 /* If it's our archive, we're done. */
1378 if (a->skip_file_set &&
1379 bhfi_dev(&a->st) == a->skip_file_dev &&
1380 bhfi_ino(&a->st) == a->skip_file_ino) {
1381 archive_set_error(&a->archive, 0,
1382 "Refusing to overwrite archive");
1383 return (ARCHIVE_FAILED);
1386 if (!S_ISDIR(st_mode)) {
1387 /* A non-dir is in the way, unlink it. */
1388 if (disk_unlink(a->name) != 0) {
1389 archive_set_error(&a->archive, errno,
1390 "Can't unlink already-existing object");
1391 return (ARCHIVE_FAILED);
1395 en = create_filesystem_object(a);
1396 } else if (!S_ISDIR(a->mode)) {
1397 /* A dir is in the way of a non-dir, rmdir it. */
1398 if (disk_rmdir(a->name) != 0) {
1399 archive_set_error(&a->archive, errno,
1400 "Can't remove already-existing dir");
1401 return (ARCHIVE_FAILED);
1404 en = create_filesystem_object(a);
1407 * There's a dir in the way of a dir. Don't
1408 * waste time with rmdir()/mkdir(), just fix
1409 * up the permissions on the existing dir.
1410 * Note that we don't change perms on existing
1411 * dirs unless _EXTRACT_PERM is specified.
1413 if ((a->mode != st_mode)
1414 && (a->todo & TODO_MODE_FORCE))
1415 a->deferred |= (a->todo & TODO_MODE);
1416 /* Ownership doesn't need deferred fixup. */
1417 en = 0; /* Forget the EEXIST. */
1422 /* Everything failed; give up here. */
1423 archive_set_error(&a->archive, en, "Can't create '%ls'",
1425 return (ARCHIVE_FAILED);
1428 a->pst = NULL; /* Cached stat data no longer valid. */
1433 * Returns 0 if creation succeeds, or else returns errno value from
1434 * the failed system call. Note: This function should only ever perform
1435 * a single system call.
1438 create_filesystem_object(struct archive_write_disk *a)
1440 /* Create the entry. */
1441 const wchar_t *linkname;
1443 mode_t final_mode, mode;
1446 /* We identify hard/symlinks according to the link names. */
1447 /* Since link(2) and symlink(2) don't handle modes, we're done here. */
1448 linkname = archive_entry_hardlink_w(a->entry);
1449 if (linkname != NULL) {
1450 wchar_t *linkfull, *namefull;
1452 linkfull = __la_win_permissive_name_w(linkname);
1453 namefull = __la_win_permissive_name_w(a->name);
1454 if (linkfull == NULL || namefull == NULL) {
1458 r = la_CreateHardLinkW(namefull, linkfull);
1460 la_dosmaperr(GetLastError());
1466 * New cpio and pax formats allow hardlink entries
1467 * to carry data, so we may have to open the file
1468 * for hardlink entries.
1470 * If the hardlink was successfully created and
1471 * the archive doesn't have carry data for it,
1472 * consider it to be non-authoritative for meta data.
1473 * This is consistent with GNU tar and BSD pax.
1474 * If the hardlink does carry data, let the last
1475 * archive entry decide ownership.
1477 if (r == 0 && a->filesize <= 0) {
1480 } else if (r == 0 && a->filesize > 0) {
1481 a->fh = CreateFileW(namefull, GENERIC_WRITE, 0, NULL,
1482 TRUNCATE_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
1483 if (a->fh == INVALID_HANDLE_VALUE) {
1484 la_dosmaperr(GetLastError());
1492 linkname = archive_entry_symlink_w(a->entry);
1493 if (linkname != NULL) {
1495 return symlink(linkname, a->name) ? errno : 0;
1502 * The remaining system calls all set permissions, so let's
1503 * try to take advantage of that to avoid an extra chmod()
1504 * call. (Recall that umask is set to zero right now!)
1507 /* Mode we want for the final restored object (w/o file type bits). */
1508 final_mode = a->mode & 07777;
1510 * The mode that will actually be restored in this step. Note
1511 * that SUID, SGID, etc, require additional work to ensure
1512 * security, so we never restore them at this point.
1514 mode = final_mode & 0777 & ~a->user_umask;
1516 switch (a->mode & AE_IFMT) {
1518 /* POSIX requires that we fall through here. */
1522 /* O_WRONLY | O_CREAT | O_EXCL */
1523 a->fh = CreateFileW(fullname, GENERIC_WRITE, 0, NULL,
1524 CREATE_NEW, FILE_ATTRIBUTE_NORMAL, NULL);
1525 if (a->fh == INVALID_HANDLE_VALUE &&
1526 GetLastError() == ERROR_INVALID_NAME &&
1527 fullname == a->name) {
1528 fullname = __la_win_permissive_name_w(a->name);
1529 a->fh = CreateFileW(fullname, GENERIC_WRITE, 0, NULL,
1530 CREATE_NEW, FILE_ATTRIBUTE_NORMAL, NULL);
1532 if (a->fh == INVALID_HANDLE_VALUE) {
1533 if (GetLastError() == ERROR_ACCESS_DENIED) {
1535 /* Simulate an errno of POSIX system. */
1536 attr = GetFileAttributesW(fullname);
1537 if (attr == (DWORD)-1)
1538 la_dosmaperr(GetLastError());
1539 else if (attr & FILE_ATTRIBUTE_DIRECTORY)
1544 la_dosmaperr(GetLastError());
1548 if (fullname != a->name)
1553 /* TODO: Find a better way to warn about our inability
1554 * to restore a block device node. */
1557 mode = (mode | MINIMUM_DIR_MODE) & MAXIMUM_DIR_MODE;
1559 r = CreateDirectoryW(fullname, NULL);
1560 if (r == 0 && GetLastError() == ERROR_INVALID_NAME &&
1561 fullname == a->name) {
1562 fullname = __la_win_permissive_name_w(a->name);
1563 r = CreateDirectoryW(fullname, NULL);
1567 /* Defer setting dir times. */
1568 a->deferred |= (a->todo & TODO_TIMES);
1569 a->todo &= ~TODO_TIMES;
1570 /* Never use an immediate chmod(). */
1571 /* We can't avoid the chmod() entirely if EXTRACT_PERM
1572 * because of SysV SGID inheritance. */
1573 if ((mode != final_mode)
1574 || (a->flags & ARCHIVE_EXTRACT_PERM))
1575 a->deferred |= (a->todo & TODO_MODE);
1576 a->todo &= ~TODO_MODE;
1578 la_dosmaperr(GetLastError());
1581 if (fullname != a->name)
1585 /* TODO: Find a better way to warn about our inability
1586 * to restore a fifo. */
1590 /* All the system calls above set errno on failure. */
1594 /* If we managed to set the final mode, we've avoided a chmod(). */
1595 if (mode == final_mode)
1596 a->todo &= ~TODO_MODE;
1601 * Cleanup function for archive_extract. Mostly, this involves processing
1602 * the fixup list, which is used to address a number of problems:
1603 * * Dir permissions might prevent us from restoring a file in that
1604 * dir, so we restore the dir with minimum 0700 permissions first,
1605 * then correct the mode at the end.
1606 * * Similarly, the act of restoring a file touches the directory
1607 * and changes the timestamp on the dir, so we have to touch-up dir
1608 * timestamps at the end as well.
1609 * * Some file flags can interfere with the restore by, for example,
1610 * preventing the creation of hardlinks to those files.
1611 * * Mac OS extended metadata includes ACLs, so must be deferred on dirs.
1613 * Note that tar/cpio do not require that archives be in a particular
1614 * order; there is no way to know when the last file has been restored
1615 * within a directory, so there's no way to optimize the memory usage
1616 * here by fixing up the directory any earlier than the
1619 * XXX TODO: Directory ACLs should be restored here, for the same
1620 * reason we set directory perms here. XXX
1623 _archive_write_disk_close(struct archive *_a)
1625 struct archive_write_disk *a = (struct archive_write_disk *)_a;
1626 struct fixup_entry *next, *p;
1629 archive_check_magic(&a->archive, ARCHIVE_WRITE_DISK_MAGIC,
1630 ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA,
1631 "archive_write_disk_close");
1632 ret = _archive_write_disk_finish_entry(&a->archive);
1634 /* Sort dir list so directories are fixed up in depth-first order. */
1635 p = sort_dir_list(a->fixup_list);
1638 a->pst = NULL; /* Mark stat cache as out-of-date. */
1639 if (p->fixup & TODO_TIMES) {
1640 set_times(a, INVALID_HANDLE_VALUE, p->mode, p->name,
1641 p->atime, p->atime_nanos,
1642 p->birthtime, p->birthtime_nanos,
1643 p->mtime, p->mtime_nanos,
1644 p->ctime, p->ctime_nanos);
1646 if (p->fixup & TODO_MODE_BASE)
1647 la_chmod(p->name, p->mode);
1648 if (p->fixup & TODO_ACLS)
1649 set_acls(a, INVALID_HANDLE_VALUE, p->name, &p->acl);
1651 archive_acl_clear(&p->acl);
1656 a->fixup_list = NULL;
1661 _archive_write_disk_free(struct archive *_a)
1663 struct archive_write_disk *a;
1666 return (ARCHIVE_OK);
1667 archive_check_magic(_a, ARCHIVE_WRITE_DISK_MAGIC,
1668 ARCHIVE_STATE_ANY | ARCHIVE_STATE_FATAL, "archive_write_disk_free");
1669 a = (struct archive_write_disk *)_a;
1670 ret = _archive_write_disk_close(&a->archive);
1671 archive_write_disk_set_group_lookup(&a->archive, NULL, NULL, NULL);
1672 archive_write_disk_set_user_lookup(&a->archive, NULL, NULL, NULL);
1674 archive_entry_free(a->entry);
1675 archive_wstring_free(&a->_name_data);
1676 archive_string_free(&a->archive.error_string);
1677 archive_wstring_free(&a->path_safe);
1678 a->archive.magic = 0;
1679 __archive_clean(&a->archive);
1685 * Simple O(n log n) merge sort to order the fixup list. In
1686 * particular, we want to restore dir timestamps depth-first.
1688 static struct fixup_entry *
1689 sort_dir_list(struct fixup_entry *p)
1691 struct fixup_entry *a, *b, *t;
1695 /* A one-item list is already sorted. */
1696 if (p->next == NULL)
1699 /* Step 1: split the list. */
1703 /* Step a twice, t once. */
1709 /* Now, t is at the mid-point, so break the list here. */
1714 /* Step 2: Recursively sort the two sub-lists. */
1715 a = sort_dir_list(a);
1716 b = sort_dir_list(b);
1718 /* Step 3: Merge the returned lists. */
1719 /* Pick the first element for the merged list. */
1720 if (wcscmp(a->name, b->name) > 0) {
1728 /* Always put the later element on the list first. */
1729 while (a != NULL && b != NULL) {
1730 if (wcscmp(a->name, b->name) > 0) {
1740 /* Only one list is non-empty, so just splice it on. */
1750 * Returns a new, initialized fixup entry.
1752 * TODO: Reduce the memory requirements for this list by using a tree
1753 * structure rather than a simple list of names.
1755 static struct fixup_entry *
1756 new_fixup(struct archive_write_disk *a, const wchar_t *pathname)
1758 struct fixup_entry *fe;
1760 fe = (struct fixup_entry *)calloc(1, sizeof(struct fixup_entry));
1763 fe->next = a->fixup_list;
1766 fe->name = _wcsdup(pathname);
1771 * Returns a fixup structure for the current entry.
1773 static struct fixup_entry *
1774 current_fixup(struct archive_write_disk *a, const wchar_t *pathname)
1776 if (a->current_fixup == NULL)
1777 a->current_fixup = new_fixup(a, pathname);
1778 return (a->current_fixup);
1781 /* TODO: Make this work. */
1783 * TODO: The deep-directory support bypasses this; disable deep directory
1784 * support if we're doing symlink checks.
1787 * TODO: Someday, integrate this with the deep dir support; they both
1788 * scan the path and both can be optimized by comparing against other
1791 /* TODO: Extend this to support symlinks on Windows Vista and later. */
1793 check_symlinks(struct archive_write_disk *a)
1798 BY_HANDLE_FILE_INFORMATION st;
1802 * Guard against symlink tricks. Reject any archive entry whose
1803 * destination would be altered by a symlink.
1805 /* Whatever we checked last time doesn't need to be re-checked. */
1808 while ((*pn != '\0') && (*p == *pn))
1811 /* Keep going until we've checked the entire name. */
1812 while (pn[0] != '\0' && (pn[0] != '\\' || pn[1] != '\0')) {
1813 /* Skip the next path element. */
1814 while (*pn != '\0' && *pn != '\\')
1818 /* Check that we haven't hit a symlink. */
1819 r = file_information(a, a->name, &st, &st_mode, 1);
1821 /* We've hit a dir that doesn't exist; stop now. */
1822 if (errno == ENOENT)
1824 } else if (S_ISLNK(st_mode)) {
1827 * Last element is symlink; remove it
1828 * so we can overwrite it with the
1829 * item being extracted.
1831 if (disk_unlink(a->name)) {
1832 archive_set_error(&a->archive, errno,
1833 "Could not remove symlink %ls",
1836 return (ARCHIVE_FAILED);
1840 * Even if we did remove it, a warning
1841 * is in order. The warning is silly,
1842 * though, if we're just replacing one
1843 * symlink with another symlink.
1845 if (!S_ISLNK(a->mode)) {
1846 archive_set_error(&a->archive, 0,
1847 "Removing symlink %ls",
1850 /* Symlink gone. No more problem! */
1853 } else if (a->flags & ARCHIVE_EXTRACT_UNLINK) {
1854 /* User asked us to remove problems. */
1855 if (disk_unlink(a->name) != 0) {
1856 archive_set_error(&a->archive, 0,
1857 "Cannot remove intervening "
1858 "symlink %ls", a->name);
1860 return (ARCHIVE_FAILED);
1864 archive_set_error(&a->archive, 0,
1865 "Cannot extract through symlink %ls",
1868 return (ARCHIVE_FAILED);
1873 /* We've checked and/or cleaned the whole path, so remember it. */
1874 archive_wstrcpy(&a->path_safe, a->name);
1875 return (ARCHIVE_OK);
1879 guidword(wchar_t *p, int n)
1883 for (i = 0; i < n; i++) {
1884 if ((*p >= L'0' && *p <= L'9') ||
1885 (*p >= L'a' && *p <= L'f') ||
1886 (*p >= L'A' && *p <= L'F'))
1895 * Canonicalize the pathname. In particular, this strips duplicate
1896 * '\' characters, '.' elements, and trailing '\'. It also raises an
1897 * error for an empty path, a trailing '..' or (if _SECURE_NODOTDOT is
1898 * set) any '..' in the path.
1901 cleanup_pathname(struct archive_write_disk *a)
1903 wchar_t *dest, *src, *p, *top;
1904 wchar_t separator = L'\0';
1908 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1909 "Invalid empty pathname");
1910 return (ARCHIVE_FAILED);
1913 /* Replace '/' by '\' */
1914 for (; *p != L'\0'; p++) {
1920 /* Skip leading "\\.\" or "\\?\" or "\\?\UNC\" or
1921 * "\\?\Volume{GUID}\"
1922 * (absolute path prefixes used by Windows API) */
1923 if (p[0] == L'\\' && p[1] == L'\\' &&
1924 (p[2] == L'.' || p[2] == L'?') && p[3] == L'\\')
1926 /* A path begin with "\\?\UNC\" */
1928 (p[4] == L'U' || p[4] == L'u') &&
1929 (p[5] == L'N' || p[5] == L'n') &&
1930 (p[6] == L'C' || p[6] == L'c') &&
1933 /* A path begin with "\\?\Volume{GUID}\" */
1934 else if (p[2] == L'?' &&
1935 (p[4] == L'V' || p[4] == L'v') &&
1936 (p[5] == L'O' || p[5] == L'o') &&
1937 (p[6] == L'L' || p[6] == L'l') &&
1938 (p[7] == L'U' || p[7] == L'u') &&
1939 (p[8] == L'M' || p[8] == L'm') &&
1940 (p[9] == L'E' || p[9] == L'e') &&
1942 if (guidword(p+11, 8) == 0 && p[19] == L'-' &&
1943 guidword(p+20, 4) == 0 && p[24] == L'-' &&
1944 guidword(p+25, 4) == 0 && p[29] == L'-' &&
1945 guidword(p+30, 4) == 0 && p[34] == L'-' &&
1946 guidword(p+35, 12) == 0 && p[47] == L'}' &&
1951 /* A path begin with "\\.\PhysicalDriveX" */
1952 } else if (p[2] == L'.' &&
1953 (p[4] == L'P' || p[4] == L'p') &&
1954 (p[5] == L'H' || p[5] == L'h') &&
1955 (p[6] == L'Y' || p[6] == L'y') &&
1956 (p[7] == L'S' || p[7] == L's') &&
1957 (p[8] == L'I' || p[8] == L'i') &&
1958 (p[9] == L'C' || p[9] == L'c') &&
1959 (p[9] == L'A' || p[9] == L'a') &&
1960 (p[9] == L'L' || p[9] == L'l') &&
1961 (p[9] == L'D' || p[9] == L'd') &&
1962 (p[9] == L'R' || p[9] == L'r') &&
1963 (p[9] == L'I' || p[9] == L'i') &&
1964 (p[9] == L'V' || p[9] == L'v') &&
1965 (p[9] == L'E' || p[9] == L'e') &&
1966 (p[10] >= L'0' && p[10] <= L'9') &&
1968 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1969 "Path is a physical drive name");
1970 return (ARCHIVE_FAILED);
1975 /* Skip leading drive letter from archives created
1977 if (((p[0] >= L'a' && p[0] <= L'z') ||
1978 (p[0] >= L'A' && p[0] <= L'Z')) &&
1980 if (p[2] == L'\0') {
1981 archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
1982 "Path is a drive name");
1983 return (ARCHIVE_FAILED);
1989 top = dest = src = p;
1990 /* Rewrite the path name if its character is a unusable. */
1991 for (; *p != L'\0'; p++) {
1992 if (*p == L':' || *p == L'*' || *p == L'?' || *p == L'"' ||
1993 *p == L'<' || *p == L'>' || *p == L'|')
1996 /* Skip leading '\'. */
2000 /* Scan the pathname one element at a time. */
2002 /* src points to first char after '\' */
2003 if (src[0] == L'\0') {
2005 } else if (src[0] == L'\\') {
2006 /* Found '\\'('//'), ignore second one. */
2009 } else if (src[0] == L'.') {
2010 if (src[1] == L'\0') {
2011 /* Ignore trailing '.' */
2013 } else if (src[1] == L'\\') {
2017 } else if (src[1] == L'.') {
2018 if (src[2] == L'\\' || src[2] == L'\0') {
2019 /* Conditionally warn about '..' */
2021 ARCHIVE_EXTRACT_SECURE_NODOTDOT) {
2022 archive_set_error(&a->archive,
2024 "Path contains '..'");
2025 return (ARCHIVE_FAILED);
2029 * Note: Under no circumstances do we
2030 * remove '..' elements. In
2031 * particular, restoring
2032 * '\foo\..\bar\' should create the
2033 * 'foo' dir as a side-effect.
2038 /* Copy current element, including leading '\'. */
2041 while (*src != L'\0' && *src != L'\\') {
2048 /* Skip '\' separator. */
2052 * We've just copied zero or more path elements, not including the
2057 * Nothing got copied. The path must have been something
2058 * like '.' or '\' or './' or '/././././/./'.
2065 /* Terminate the result. */
2067 return (ARCHIVE_OK);
2071 * Create the parent directory of the specified path, assuming path
2072 * is already in mutable storage.
2075 create_parent_dir(struct archive_write_disk *a, wchar_t *path)
2080 /* Remove tail element to obtain parent name. */
2081 slash = wcsrchr(path, L'\\');
2083 return (ARCHIVE_OK);
2085 r = create_dir(a, path);
2091 * Create the specified dir, recursing to create parents as necessary.
2093 * Returns ARCHIVE_OK if the path exists when we're done here.
2094 * Otherwise, returns ARCHIVE_FAILED.
2095 * Assumes path is in mutable storage; path is unchanged on exit.
2098 create_dir(struct archive_write_disk *a, wchar_t *path)
2100 BY_HANDLE_FILE_INFORMATION st;
2101 struct fixup_entry *le;
2102 wchar_t *slash, *base, *full;
2103 mode_t mode_final, mode, st_mode;
2106 /* Check for special names and just skip them. */
2107 slash = wcsrchr(path, L'\\');
2113 if (base[0] == L'\0' ||
2114 (base[0] == L'.' && base[1] == L'\0') ||
2115 (base[0] == L'.' && base[1] == L'.' && base[2] == L'\0')) {
2116 /* Don't bother trying to create null path, '.', or '..'. */
2117 if (slash != NULL) {
2119 r = create_dir(a, path);
2123 return (ARCHIVE_OK);
2127 * Yes, this should be stat() and not lstat(). Using lstat()
2128 * here loses the ability to extract through symlinks. Also note
2129 * that this should not use the a->st cache.
2131 if (file_information(a, path, &st, &st_mode, 0) == 0) {
2132 if (S_ISDIR(st_mode))
2133 return (ARCHIVE_OK);
2134 if ((a->flags & ARCHIVE_EXTRACT_NO_OVERWRITE)) {
2135 archive_set_error(&a->archive, EEXIST,
2136 "Can't create directory '%ls'", path);
2137 return (ARCHIVE_FAILED);
2139 if (disk_unlink(path) != 0) {
2140 archive_set_error(&a->archive, errno,
2141 "Can't create directory '%ls': "
2142 "Conflicting file cannot be removed",
2144 return (ARCHIVE_FAILED);
2146 } else if (errno != ENOENT && errno != ENOTDIR) {
2148 archive_set_error(&a->archive, errno,
2149 "Can't test directory '%ls'", path);
2150 return (ARCHIVE_FAILED);
2151 } else if (slash != NULL) {
2153 r = create_dir(a, path);
2155 if (r != ARCHIVE_OK)
2160 * Mode we want for the final restored directory. Per POSIX,
2161 * implicitly-created dirs must be created obeying the umask.
2162 * There's no mention whether this is different for privileged
2163 * restores (which the rest of this code handles by pretending
2164 * umask=0). I've chosen here to always obey the user's umask for
2165 * implicit dirs, even if _EXTRACT_PERM was specified.
2167 mode_final = DEFAULT_DIR_MODE & ~a->user_umask;
2168 /* Mode we want on disk during the restore process. */
2170 mode |= MINIMUM_DIR_MODE;
2171 mode &= MAXIMUM_DIR_MODE;
2173 * Apply __la_win_permissive_name_w to path in order to
2174 * remove '../' path string.
2176 full = __la_win_permissive_name_w(path);
2179 else if (CreateDirectoryW(full, NULL) != 0) {
2180 if (mode != mode_final) {
2181 le = new_fixup(a, path);
2182 le->fixup |=TODO_MODE_BASE;
2183 le->mode = mode_final;
2186 return (ARCHIVE_OK);
2188 la_dosmaperr(GetLastError());
2193 * Without the following check, a/b/../b/c/d fails at the
2194 * second visit to 'b', so 'd' can't be created. Note that we
2195 * don't add it to the fixup list here, as it's already been
2198 if (file_information(a, path, &st, &st_mode, 0) == 0 &&
2200 return (ARCHIVE_OK);
2202 archive_set_error(&a->archive, errno, "Failed to create dir '%ls'",
2204 return (ARCHIVE_FAILED);
2208 * Note: Although we can skip setting the user id if the desired user
2209 * id matches the current user, we cannot skip setting the group, as
2210 * many systems set the gid based on the containing directory. So
2211 * we have to perform a chown syscall if we want to set the SGID
2212 * bit. (The alternative is to stat() and then possibly chown(); it's
2213 * more efficient to skip the stat() and just always chown().) Note
2214 * that a successful chown() here clears the TODO_SGID_CHECK bit, which
2215 * allows set_mode to skip the stat() check for the GID.
2218 set_ownership(struct archive_write_disk *a)
2220 /* unfortunately, on win32 there is no 'root' user with uid 0,
2221 so we just have to try the chown and see if it works */
2223 /* If we know we can't change it, don't bother trying. */
2224 if (a->user_uid != 0 && a->user_uid != a->uid) {
2225 archive_set_error(&a->archive, errno,
2226 "Can't set UID=%jd", (intmax_t)a->uid);
2227 return (ARCHIVE_WARN);
2230 archive_set_error(&a->archive, errno,
2231 "Can't set user=%jd/group=%jd for %ls",
2232 (intmax_t)a->uid, (intmax_t)a->gid, a->name);
2233 return (ARCHIVE_WARN);
2237 set_times(struct archive_write_disk *a,
2238 HANDLE h, int mode, const wchar_t *name,
2239 time_t atime, long atime_nanos,
2240 time_t birthtime, long birthtime_nanos,
2241 time_t mtime, long mtime_nanos,
2242 time_t ctime_sec, long ctime_nanos)
2244 #define EPOC_TIME ARCHIVE_LITERAL_ULL(116444736000000000)
2245 #define WINTIME(sec, nsec) ((Int32x32To64(sec, 10000000) + EPOC_TIME)\
2246 + (((nsec)/1000)*10))
2249 ULARGE_INTEGER wintm;
2251 FILETIME fatime, fbtime, fmtime;
2253 (void)ctime_sec; /* UNUSED */
2254 (void)ctime_nanos; /* UNUSED */
2256 if (h != INVALID_HANDLE_VALUE) {
2262 return (ARCHIVE_OK);
2263 ws = __la_win_permissive_name_w(name);
2265 goto settimes_failed;
2266 hw = CreateFileW(ws, FILE_WRITE_ATTRIBUTES,
2267 0, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
2269 if (hw == INVALID_HANDLE_VALUE)
2270 goto settimes_failed;
2274 wintm.QuadPart = WINTIME(atime, atime_nanos);
2275 fatime.dwLowDateTime = wintm.LowPart;
2276 fatime.dwHighDateTime = wintm.HighPart;
2277 wintm.QuadPart = WINTIME(mtime, mtime_nanos);
2278 fmtime.dwLowDateTime = wintm.LowPart;
2279 fmtime.dwHighDateTime = wintm.HighPart;
2281 * SetFileTime() supports birthtime.
2283 if (birthtime > 0 || birthtime_nanos > 0) {
2284 wintm.QuadPart = WINTIME(birthtime, birthtime_nanos);
2285 fbtime.dwLowDateTime = wintm.LowPart;
2286 fbtime.dwHighDateTime = wintm.HighPart;
2290 if (SetFileTime(h, pfbtime, &fatime, &fmtime) == 0)
2291 goto settimes_failed;
2293 return (ARCHIVE_OK);
2297 archive_set_error(&a->archive, EINVAL, "Can't restore time");
2298 return (ARCHIVE_WARN);
2302 set_times_from_entry(struct archive_write_disk *a)
2304 time_t atime, birthtime, mtime, ctime_sec;
2305 long atime_nsec, birthtime_nsec, mtime_nsec, ctime_nsec;
2307 /* Suitable defaults. */
2308 atime = birthtime = mtime = ctime_sec = a->start_time;
2309 atime_nsec = birthtime_nsec = mtime_nsec = ctime_nsec = 0;
2311 /* If no time was provided, we're done. */
2312 if (!archive_entry_atime_is_set(a->entry)
2313 && !archive_entry_birthtime_is_set(a->entry)
2314 && !archive_entry_mtime_is_set(a->entry))
2315 return (ARCHIVE_OK);
2317 if (archive_entry_atime_is_set(a->entry)) {
2318 atime = archive_entry_atime(a->entry);
2319 atime_nsec = archive_entry_atime_nsec(a->entry);
2321 if (archive_entry_birthtime_is_set(a->entry)) {
2322 birthtime = archive_entry_birthtime(a->entry);
2323 birthtime_nsec = archive_entry_birthtime_nsec(a->entry);
2325 if (archive_entry_mtime_is_set(a->entry)) {
2326 mtime = archive_entry_mtime(a->entry);
2327 mtime_nsec = archive_entry_mtime_nsec(a->entry);
2329 if (archive_entry_ctime_is_set(a->entry)) {
2330 ctime_sec = archive_entry_ctime(a->entry);
2331 ctime_nsec = archive_entry_ctime_nsec(a->entry);
2334 return set_times(a, a->fh, a->mode, a->name,
2336 birthtime, birthtime_nsec,
2338 ctime_sec, ctime_nsec);
2342 set_mode(struct archive_write_disk *a, int mode)
2345 mode &= 07777; /* Strip off file type bits. */
2347 if (a->todo & TODO_SGID_CHECK) {
2349 * If we don't know the GID is right, we must stat()
2350 * to verify it. We can't just check the GID of this
2351 * process, since systems sometimes set GID from
2352 * the enclosing dir or based on ACLs.
2354 if ((r = lazy_stat(a)) != ARCHIVE_OK)
2359 /* While we're here, double-check the UID. */
2361 && (a->todo & TODO_SUID)) {
2364 a->todo &= ~TODO_SGID_CHECK;
2365 a->todo &= ~TODO_SUID_CHECK;
2366 } else if (a->todo & TODO_SUID_CHECK) {
2368 * If we don't know the UID is right, we can just check
2369 * the user, since all systems set the file UID from
2372 if (a->user_uid != a->uid) {
2375 a->todo &= ~TODO_SUID_CHECK;
2378 if (S_ISLNK(a->mode)) {
2381 * If this is a symlink, use lchmod(). If the
2382 * platform doesn't support lchmod(), just skip it. A
2383 * platform that doesn't provide a way to set
2384 * permissions on symlinks probably ignores
2385 * permissions on symlinks, so a failure here has no
2388 if (lchmod(a->name, mode) != 0) {
2389 archive_set_error(&a->archive, errno,
2390 "Can't set permissions to 0%o", (int)mode);
2394 } else if (!S_ISDIR(a->mode)) {
2396 * If it's not a symlink and not a dir, then use
2397 * fchmod() or chmod(), depending on whether we have
2398 * an fd. Dirs get their perms set during the
2399 * post-extract fixup, which is handled elsewhere.
2403 if (fchmod(a->fd, mode) != 0) {
2404 archive_set_error(&a->archive, errno,
2405 "Can't set permissions to 0%o", (int)mode);
2410 /* If this platform lacks fchmod(), then
2411 * we'll just use chmod(). */
2412 if (la_chmod(a->name, mode) != 0) {
2413 archive_set_error(&a->archive, errno,
2414 "Can't set permissions to 0%o", (int)mode);
2422 set_fflags(struct archive_write_disk *a)
2424 (void)a; /* UNUSED */
2425 return (ARCHIVE_OK);
2428 /* Default empty function body to satisfy mainline code. */
2430 set_acls(struct archive_write_disk *a, HANDLE h, const wchar_t *name,
2431 struct archive_acl *acl)
2433 (void)a; /* UNUSED */
2434 (void)h; /* UNUSED */
2435 (void)name; /* UNUSED */
2436 (void)acl; /* UNUSED */
2437 return (ARCHIVE_OK);
2441 * Restore extended attributes - stub implementation for unsupported systems
2444 set_xattrs(struct archive_write_disk *a)
2446 static int warning_done = 0;
2448 /* If there aren't any extended attributes, then it's okay not
2449 * to extract them, otherwise, issue a single warning. */
2450 if (archive_entry_xattr_count(a->entry) != 0 && !warning_done) {
2452 archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
2453 "Cannot restore extended attributes on this system");
2454 return (ARCHIVE_WARN);
2456 /* Warning was already emitted; suppress further warnings. */
2457 return (ARCHIVE_OK);
2461 fileTimeToUtc(const FILETIME *filetime, time_t *t, long *ns)
2465 utc.HighPart = filetime->dwHighDateTime;
2466 utc.LowPart = filetime->dwLowDateTime;
2467 if (utc.QuadPart >= EPOC_TIME) {
2468 utc.QuadPart -= EPOC_TIME;
2469 /* milli seconds base */
2470 *t = (time_t)(utc.QuadPart / 10000000);
2471 /* nano seconds base */
2472 *ns = (long)(utc.QuadPart % 10000000) * 100;
2479 * Test if file on disk is older than entry.
2482 older(BY_HANDLE_FILE_INFORMATION *st, struct archive_entry *entry)
2487 fileTimeToUtc(&st->ftLastWriteTime, &sec, &nsec);
2488 /* First, test the seconds and return if we have a definite answer. */
2489 /* Definitely older. */
2490 if (sec < archive_entry_mtime(entry))
2492 /* Definitely younger. */
2493 if (sec > archive_entry_mtime(entry))
2495 if (nsec < archive_entry_mtime_nsec(entry))
2497 /* Same age or newer, so not older. */
2501 #endif /* _WIN32 && !__CYGWIN__ */