2 * Encode and decode standard Unix attributes and
3 * Extended attributes for Win32 and
4 * other non-Unix systems, or Unix systems with ACLs, ...
6 * Kern Sibbald, October MMII
12 Copyright (C) 2000-2005 Kern Sibbald
14 This program is free software; you can redistribute it and/or
15 modify it under the terms of the GNU General Public License
16 version 2 as amended with additional clauses defined in the
17 file LICENSE in the main source directory.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 the file LICENSE for additional details.
29 #if defined(HAVE_CYGWIN) || defined(HAVE_WIN32)
31 #include "../lib/winapi.h"
34 /* Forward referenced subroutines */
35 static bool set_win32_attributes(JCR *jcr, ATTR *attr, BFILE *ofd);
36 void unix_name_to_win32(POOLMEM **win32_name, char *name);
37 void win_error(JCR *jcr, char *prefix, POOLMEM *ofile);
38 HANDLE bget_handle(BFILE *bfd);
41 /* For old systems that don't have lchown() use chown() */
46 /*=============================================================*/
48 /* *** A l l S y s t e m s *** */
50 /*=============================================================*/
53 * Return the data stream that will be used
55 int select_data_stream(FF_PKT *ff_pkt)
60 * Fix all incompatible options
63 /* No sparse option for encrypted data */
64 if (ff_pkt->flags & FO_ENCRYPT) {
65 ff_pkt->flags &= ~FO_SPARSE;
68 /* Note, no sparse option for win32_data */
69 if (!is_portable_backup(&ff_pkt->bfd)) {
70 stream = STREAM_WIN32_DATA;
71 ff_pkt->flags &= ~FO_SPARSE;
72 } else if (ff_pkt->flags & FO_SPARSE) {
73 stream = STREAM_SPARSE_DATA;
75 stream = STREAM_FILE_DATA;
78 /* Encryption is only supported for file data */
79 if (stream != STREAM_FILE_DATA && stream != STREAM_WIN32_DATA &&
80 stream != STREAM_MACOS_FORK_DATA) {
81 ff_pkt->flags &= ~FO_ENCRYPT;
84 /* Compression is not supported for Mac fork data */
85 if (stream == STREAM_MACOS_FORK_DATA) {
86 ff_pkt->flags &= ~FO_GZIP;
90 * Handle compression and encryption options
93 if (ff_pkt->flags & FO_GZIP) {
95 case STREAM_WIN32_DATA:
96 stream = STREAM_WIN32_GZIP_DATA;
98 case STREAM_SPARSE_DATA:
99 stream = STREAM_SPARSE_GZIP_DATA;
101 case STREAM_FILE_DATA:
102 stream = STREAM_GZIP_DATA;
105 /* All stream types that do not support gzip should clear out
106 * FO_GZIP above, and this code block should be unreachable. */
107 ASSERT(!ff_pkt->flags & FO_GZIP);
113 if (ff_pkt->flags & FO_ENCRYPT) {
115 case STREAM_WIN32_DATA:
116 stream = STREAM_ENCRYPTED_WIN32_DATA;
118 case STREAM_WIN32_GZIP_DATA:
119 stream = STREAM_ENCRYPTED_WIN32_GZIP_DATA;
121 case STREAM_FILE_DATA:
122 stream = STREAM_ENCRYPTED_FILE_DATA;
124 case STREAM_GZIP_DATA:
125 stream = STREAM_ENCRYPTED_FILE_GZIP_DATA;
128 /* All stream types that do not support encryption should clear out
129 * FO_ENCRYPT above, and this code block should be unreachable. */
130 ASSERT(!ff_pkt->flags & FO_ENCRYPT);
141 * Encode a stat structure into a base64 character string
142 * All systems must create such a structure.
143 * In addition, we tack on the LinkFI, which is non-zero in
144 * the case of a hard linked file that has no data. This
145 * is a File Index pointing to the link that does have the
146 * data (always the first one encountered in a save).
147 * You may piggyback attributes on this packet by encoding
148 * them in the encode_attribsEx() subroutine, but this is
151 void encode_stat(char *buf, FF_PKT *ff_pkt, int data_stream)
154 struct stat *statp = &ff_pkt->statp;
156 * Encode a stat packet. I should have done this more intelligently
157 * with a length so that it could be easily expanded.
159 p += to_base64((int64_t)statp->st_dev, p);
160 *p++ = ' '; /* separate fields with a space */
161 p += to_base64((int64_t)statp->st_ino, p);
163 p += to_base64((int64_t)statp->st_mode, p);
165 p += to_base64((int64_t)statp->st_nlink, p);
167 p += to_base64((int64_t)statp->st_uid, p);
169 p += to_base64((int64_t)statp->st_gid, p);
171 p += to_base64((int64_t)statp->st_rdev, p);
173 p += to_base64((int64_t)statp->st_size, p);
176 p += to_base64((int64_t)statp->st_blksize, p);
178 p += to_base64((int64_t)statp->st_blocks, p);
181 p += to_base64((int64_t)0, p); /* output place holder */
183 p += to_base64((int64_t)0, p); /* output place holder */
186 p += to_base64((int64_t)statp->st_atime, p);
188 p += to_base64((int64_t)statp->st_mtime, p);
190 p += to_base64((int64_t)statp->st_ctime, p);
192 p += to_base64((int64_t)ff_pkt->LinkFI, p);
196 /* FreeBSD function */
197 p += to_base64((int64_t)statp->st_flags, p); /* output st_flags */
199 p += to_base64((int64_t)0, p); /* output place holder */
202 p += to_base64((int64_t)data_stream, p);
208 /* Do casting according to unknown type to keep compiler happy */
209 #if !HAVE_GCC & HAVE_SUN_OS
210 #define plug(st, val) st = val /* brain damaged compiler */
212 template <class T> void plug(T &st, uint64_t val)
213 { st = static_cast<T>(val); }
217 /* Decode a stat packet from base64 characters */
218 int decode_stat(char *buf, struct stat *statp, int32_t *LinkFI)
223 p += from_base64(&val, p);
224 plug(statp->st_dev, val);
226 p += from_base64(&val, p);
227 plug(statp->st_ino, val);
229 p += from_base64(&val, p);
230 plug(statp->st_mode, val);
232 p += from_base64(&val, p);
233 plug(statp->st_nlink, val);
235 p += from_base64(&val, p);
236 plug(statp->st_uid, val);
238 p += from_base64(&val, p);
239 plug(statp->st_gid, val);
241 p += from_base64(&val, p);
242 plug(statp->st_rdev, val);
244 p += from_base64(&val, p);
245 plug(statp->st_size, val);
248 p += from_base64(&val, p);
249 plug(statp->st_blksize, val);
251 p += from_base64(&val, p);
252 plug(statp->st_blocks, val);
255 p += from_base64(&val, p);
256 // plug(statp->st_blksize, val);
258 p += from_base64(&val, p);
259 // plug(statp->st_blocks, val);
262 p += from_base64(&val, p);
263 plug(statp->st_atime, val);
265 p += from_base64(&val, p);
266 plug(statp->st_mtime, val);
268 p += from_base64(&val, p);
269 plug(statp->st_ctime, val);
271 /* Optional FileIndex of hard linked file data */
272 if (*p == ' ' || (*p != 0 && *(p+1) == ' ')) {
274 p += from_base64(&val, p);
275 *LinkFI = (uint32_t)val;
281 /* FreeBSD user flags */
282 if (*p == ' ' || (*p != 0 && *(p+1) == ' ')) {
284 p += from_base64(&val, p);
286 plug(statp->st_flags, val);
292 /* Look for data stream id */
293 if (*p == ' ' || (*p != 0 && *(p+1) == ' ')) {
295 p += from_base64(&val, p);
302 /* Decode a LinkFI field of encoded stat packet */
303 int32_t decode_LinkFI(char *buf, struct stat *statp)
308 skip_nonspaces(&p); /* st_dev */
309 p++; /* skip space */
310 skip_nonspaces(&p); /* st_ino */
312 p += from_base64(&val, p);
313 plug(statp->st_mode, val); /* st_mode */
315 skip_nonspaces(&p); /* st_nlink */
317 skip_nonspaces(&p); /* st_uid */
319 skip_nonspaces(&p); /* st_gid */
321 skip_nonspaces(&p); /* st_rdev */
323 skip_nonspaces(&p); /* st_size */
325 skip_nonspaces(&p); /* st_blksize */
327 skip_nonspaces(&p); /* st_blocks */
329 skip_nonspaces(&p); /* st_atime */
331 skip_nonspaces(&p); /* st_mtime */
333 skip_nonspaces(&p); /* st_ctime */
335 /* Optional FileIndex of hard linked file data */
336 if (*p == ' ' || (*p != 0 && *(p+1) == ' ')) {
338 p += from_base64(&val, p);
345 * Set file modes, permissions and times
347 * fname is the original filename
348 * ofile is the output filename (may be in a different directory)
350 * Returns: true on success
353 bool set_attributes(JCR *jcr, ATTR *attr, BFILE *ofd)
360 #if defined(HAVE_CYGWIN) || defined(HAVE_WIN32)
361 if (attr->stream == STREAM_UNIX_ATTRIBUTES_EX &&
362 set_win32_attributes(jcr, attr, ofd)) {
366 pm_strcpy(attr->ofname, "*none*");
369 if (attr->data_stream == STREAM_WIN32_DATA ||
370 attr->data_stream == STREAM_WIN32_GZIP_DATA) {
374 pm_strcpy(attr->ofname, "*none*");
380 * If Windows stuff failed, e.g. attempt to restore Unix file
381 * to Windows, simply fall through and we will do it the
388 char ec1[50], ec2[50];
389 fsize = blseek(ofd, 0, SEEK_END);
390 bclose(ofd); /* first close file */
391 if (fsize > 0 && fsize != (off_t)attr->statp.st_size) {
392 Jmsg3(jcr, M_ERROR, 0, _("File size of restored file %s not correct. Original %s, restored %s.\n"),
393 attr->ofname, edit_uint64(attr->statp.st_size, ec1),
394 edit_uint64(fsize, ec2));
398 ut.actime = attr->statp.st_atime;
399 ut.modtime = attr->statp.st_mtime;
401 /* ***FIXME**** optimize -- don't do if already correct */
403 * For link, change owner of link using lchown, but don't
404 * try to do a chmod as that will update the file behind it.
406 if (attr->type == FT_LNK) {
407 /* Change owner of link, not of real file */
408 if (lchown(attr->ofname, attr->statp.st_uid, attr->statp.st_gid) < 0) {
410 Jmsg2(jcr, M_ERROR, 0, _("Unable to set file owner %s: ERR=%s\n"),
411 attr->ofname, be.strerror());
415 if (chown(attr->ofname, attr->statp.st_uid, attr->statp.st_gid) < 0) {
417 Jmsg2(jcr, M_ERROR, 0, _("Unable to set file owner %s: ERR=%s\n"),
418 attr->ofname, be.strerror());
421 if (chmod(attr->ofname, attr->statp.st_mode) < 0) {
423 Jmsg2(jcr, M_ERROR, 0, _("Unable to set file modes %s: ERR=%s\n"),
424 attr->ofname, be.strerror());
431 if (utime(attr->ofname, &ut) < 0) {
433 Jmsg2(jcr, M_ERROR, 0, _("Unable to set file times %s: ERR=%s\n"),
434 attr->ofname, be.strerror());
441 * Note, this should really be done before the utime() above,
442 * but if the immutable bit is set, it will make the utimes()
445 if (chflags(attr->ofname, attr->statp.st_flags) < 0) {
447 Jmsg2(jcr, M_ERROR, 0, _("Unable to set file flags %s: ERR=%s\n"),
448 attr->ofname, be.strerror());
453 pm_strcpy(attr->ofname, "*none*");
459 /*=============================================================*/
461 /* * * * U n i x * * * * */
463 /*=============================================================*/
465 #if !defined(HAVE_CYGWIN) && !defined(HAVE_WIN32)
468 * It is possible to piggyback additional data e.g. ACLs on
469 * the encode_stat() data by returning the extended attributes
470 * here. They must be "self-contained" (i.e. you keep track
471 * of your own length), and they must be in ASCII string
472 * format. Using this feature is not recommended.
473 * The code below shows how to return nothing. See the Win32
474 * code below for returning something in the attributes.
476 int encode_attribsEx(JCR *jcr, char *attribsEx, FF_PKT *ff_pkt)
478 #ifdef HAVE_DARWIN_OS
480 * We save the Mac resource fork length so that on a
481 * restore, we can be sure we put back the whole resource.
485 if (ff_pkt->flags & FO_HFSPLUS) {
486 p += to_base64((uint64_t)(ff_pkt->hfsinfo.rsrclength), p);
490 *attribsEx = 0; /* no extended attributes */
492 return STREAM_UNIX_ATTRIBUTES;
499 /*=============================================================*/
501 /* * * * W i n 3 2 * * * * */
503 /*=============================================================*/
505 #if defined(HAVE_CYGWIN) || defined(HAVE_WIN32)
507 int encode_attribsEx(JCR *jcr, char *attribsEx, FF_PKT *ff_pkt)
510 WIN32_FILE_ATTRIBUTE_DATA atts;
513 attribsEx[0] = 0; /* no extended attributes */
515 // try unicode version
516 if (p_GetFileAttributesExW) {
517 unix_name_to_win32(&ff_pkt->sys_fname, ff_pkt->fname);
519 POOLMEM* pwszBuf = get_pool_memory (PM_FNAME);
520 UTF8_2_wchar(&pwszBuf, ff_pkt->sys_fname);
522 BOOL b=p_GetFileAttributesExW((LPCWSTR) pwszBuf, GetFileExInfoStandard, (LPVOID)&atts);
523 free_pool_memory(pwszBuf);
526 win_error(jcr, "GetFileAttributesExW:", ff_pkt->sys_fname);
527 return STREAM_UNIX_ATTRIBUTES;
531 if (!p_GetFileAttributesExA)
532 return STREAM_UNIX_ATTRIBUTES;
534 unix_name_to_win32(&ff_pkt->sys_fname, ff_pkt->fname);
536 if (!p_GetFileAttributesExA(ff_pkt->sys_fname, GetFileExInfoStandard,
538 win_error(jcr, "GetFileAttributesExA:", ff_pkt->sys_fname);
539 return STREAM_UNIX_ATTRIBUTES;
543 p += to_base64((uint64_t)atts.dwFileAttributes, p);
544 *p++ = ' '; /* separate fields with a space */
545 li.LowPart = atts.ftCreationTime.dwLowDateTime;
546 li.HighPart = atts.ftCreationTime.dwHighDateTime;
547 p += to_base64((uint64_t)li.QuadPart, p);
549 li.LowPart = atts.ftLastAccessTime.dwLowDateTime;
550 li.HighPart = atts.ftLastAccessTime.dwHighDateTime;
551 p += to_base64((uint64_t)li.QuadPart, p);
553 li.LowPart = atts.ftLastWriteTime.dwLowDateTime;
554 li.HighPart = atts.ftLastWriteTime.dwHighDateTime;
555 p += to_base64((uint64_t)li.QuadPart, p);
557 p += to_base64((uint64_t)atts.nFileSizeHigh, p);
559 p += to_base64((uint64_t)atts.nFileSizeLow, p);
561 return STREAM_UNIX_ATTRIBUTES_EX;
564 /* Define attributes that are legal to set with SetFileAttributes() */
565 #define SET_ATTRS ( \
566 FILE_ATTRIBUTE_ARCHIVE| \
567 FILE_ATTRIBUTE_HIDDEN| \
568 FILE_ATTRIBUTE_NORMAL| \
569 FILE_ATTRIBUTE_NOT_CONTENT_INDEXED| \
570 FILE_ATTRIBUTE_OFFLINE| \
571 FILE_ATTRIBUTE_READONLY| \
572 FILE_ATTRIBUTE_SYSTEM| \
573 FILE_ATTRIBUTE_TEMPORARY)
577 * Set Extended File Attributes for Win32
579 * fname is the original filename
580 * ofile is the output filename (may be in a different directory)
582 * Returns: true on success
585 static bool set_win32_attributes(JCR *jcr, ATTR *attr, BFILE *ofd)
587 char *p = attr->attrEx;
589 WIN32_FILE_ATTRIBUTE_DATA atts;
591 POOLMEM *win32_ofile;
593 // if we have neither ansi nor wchar version, we leave
594 if (!(p_SetFileAttributesW || p_SetFileAttributesA))
597 if (!p || !*p) { /* we should have attributes */
598 Dmsg2(100, "Attributes missing. of=%s ofd=%d\n", attr->ofname, ofd->fid);
604 Dmsg2(100, "Attribs %s = %s\n", attr->ofname, attr->attrEx);
607 p += from_base64(&val, p);
608 plug(atts.dwFileAttributes, val);
609 p++; /* skip space */
610 p += from_base64(&val, p);
612 atts.ftCreationTime.dwLowDateTime = li.LowPart;
613 atts.ftCreationTime.dwHighDateTime = li.HighPart;
614 p++; /* skip space */
615 p += from_base64(&val, p);
617 atts.ftLastAccessTime.dwLowDateTime = li.LowPart;
618 atts.ftLastAccessTime.dwHighDateTime = li.HighPart;
619 p++; /* skip space */
620 p += from_base64(&val, p);
622 atts.ftLastWriteTime.dwLowDateTime = li.LowPart;
623 atts.ftLastWriteTime.dwHighDateTime = li.HighPart;
625 p += from_base64(&val, p);
626 plug(atts.nFileSizeHigh, val);
628 p += from_base64(&val, p);
629 plug(atts.nFileSizeLow, val);
631 /* Convert to Windows path format */
632 win32_ofile = get_pool_memory(PM_FNAME);
633 unix_name_to_win32(&win32_ofile, attr->ofname);
637 /* At this point, we have reconstructed the WIN32_FILE_ATTRIBUTE_DATA pkt */
639 if (!is_bopen(ofd)) {
640 Dmsg1(100, "File not open: %s\n", attr->ofname);
641 bopen(ofd, attr->ofname, O_WRONLY|O_BINARY, 0); /* attempt to open the file */
645 Dmsg1(100, "SetFileTime %s\n", attr->ofname);
646 if (!SetFileTime(bget_handle(ofd),
647 &atts.ftCreationTime,
648 &atts.ftLastAccessTime,
649 &atts.ftLastWriteTime)) {
650 win_error(jcr, "SetFileTime:", win32_ofile);
655 Dmsg1(100, "SetFileAtts %s\n", attr->ofname);
656 if (!(atts.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
658 if (p_SetFileAttributesW) {
659 POOLMEM* pwszBuf = get_pool_memory (PM_FNAME);
660 UTF8_2_wchar(&pwszBuf, win32_ofile);
662 BOOL b=p_SetFileAttributesW((LPCWSTR)pwszBuf, atts.dwFileAttributes & SET_ATTRS);
663 free_pool_memory(pwszBuf);
666 win_error(jcr, "SetFileAttributesW:", win32_ofile);
669 if (!p_SetFileAttributesA(win32_ofile, atts.dwFileAttributes & SET_ATTRS)) {
670 win_error(jcr, "SetFileAttributesA:", win32_ofile);
674 free_pool_memory(win32_ofile);
678 void win_error(JCR *jcr, char *prefix, POOLMEM *win32_ofile)
680 DWORD lerror = GetLastError();
682 FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|
683 FORMAT_MESSAGE_FROM_SYSTEM,
690 Dmsg3(100, "Error in %s on file %s: ERR=%s\n", prefix, win32_ofile, msg);
691 strip_trailing_junk(msg);
692 Jmsg(jcr, M_ERROR, 0, _("Error in %s file %s: ERR=%s\n"), prefix, win32_ofile, msg);
696 void win_error(JCR *jcr, char *prefix, DWORD lerror)
699 FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|
700 FORMAT_MESSAGE_FROM_SYSTEM,
707 strip_trailing_junk(msg);
709 Jmsg2(jcr, M_ERROR, 0, _("Error in %s: ERR=%s\n"), prefix, msg);
711 MessageBox(NULL, msg, prefix, MB_OK);
717 /* Conversion of a Unix filename to a Win32 filename */
718 extern void conv_unix_to_win32_path(const char *path, char *win32_path, DWORD dwSize);
719 void unix_name_to_win32(POOLMEM **win32_name, char *name)
721 /* One extra byte should suffice, but we double it */
722 /* add MAX_PATH bytes for VSS shadow copy name */
723 DWORD dwSize = 2*strlen(name)+MAX_PATH;
724 *win32_name = check_pool_memory_size(*win32_name, dwSize);
725 conv_unix_to_win32_path(name, *win32_name, dwSize);
728 #endif /* HAVE_CYGWIN */