2 * Routines only used by the receiving process.
4 * Copyright (C) 1996-2000 Andrew Tridgell
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2003-2008 Wayne Davison
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, visit the http://fsf.org website.
28 extern int inc_recurse;
29 extern int log_before_transfer;
30 extern int stdout_format_has_i;
31 extern int logfile_format_has_i;
32 extern int csum_length;
33 extern int read_batch;
34 extern int write_batch;
35 extern int batch_gen_fd;
36 extern int protocol_version;
37 extern int relative_paths;
38 extern int preserve_hard_links;
39 extern int preserve_perms;
40 extern int preserve_xattrs;
41 extern int basis_dir_cnt;
42 extern int make_backups;
43 extern int cleanup_got_literal;
44 extern int remove_source_files;
45 extern int append_mode;
46 extern int sparse_files;
47 extern int keep_partial;
48 extern int checksum_len;
49 extern int checksum_seed;
51 extern int delay_updates;
52 extern mode_t orig_umask;
53 extern struct stats stats;
55 extern char *partial_dir;
56 extern char *basis_dir[MAX_BASIS_DIRS+1];
57 extern char sender_file_sum[MAX_DIGEST_LEN];
58 extern struct file_list *cur_flist, *first_flist, *dir_flist;
59 extern struct filter_list_struct daemon_filter_list;
61 static struct bitbag *delayed_bits = NULL;
62 static int phase = 0, redoing = 0;
63 static flist_ndx_list batch_redo_list;
64 /* We're either updating the basis file or an identical copy: */
65 static int updating_basis_or_equiv;
68 * get_tmpname() - create a tmp filename for a given filename
70 * If a tmpdir is defined, use that as the directory to
71 * put it in. Otherwise, the tmp filename is in the same
72 * directory as the given name. Note that there may be no
73 * directory at all in the given name!
75 * The tmp filename is basically the given filename with a
76 * dot prepended, and .XXXXXX appended (for mkstemp() to
77 * put its unique gunk in). Take care to not exceed
78 * either the MAXPATHLEN or NAME_MAX, esp. the last, as
79 * the basename basically becomes 8 chars longer. In that
80 * case, the original name is shortened sufficiently to
83 * Of course, there's no real reason for the tmp name to
84 * look like the original, except to satisfy us humans.
85 * As long as it's unique, rsync will work.
88 int get_tmpname(char *fnametmp, const char *fname)
90 int maxname, added, length = 0;
94 /* Note: this can't overflow, so the return value is safe */
95 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
96 fnametmp[length++] = '/';
99 if ((f = strrchr(fname, '/')) != NULL) {
103 /* copy up to and including the slash */
104 strlcpy(fnametmp, fname, length + 1);
108 fnametmp[length++] = '.';
110 /* The maxname value is bufsize, and includes space for the '\0'.
111 * (Note that NAME_MAX get -8 for the leading '.' above.) */
112 maxname = MIN(MAXPATHLEN - 7 - length, NAME_MAX - 8);
115 rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
120 added = strlcpy(fnametmp + length, f, maxname);
121 if (added >= maxname)
123 memcpy(fnametmp + length + added, ".XXXXXX", 8);
128 /* Opens a temporary file for writing.
129 * Success: Writes name into fnametmp, returns fd.
130 * Failure: Clobbers fnametmp, returns -1.
131 * Calling cleanup_set() is the caller's job. */
132 int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
136 if (!get_tmpname(fnametmp, fname))
139 /* We initially set the perms without the setuid/setgid bits or group
140 * access to ensure that there is no race condition. They will be
141 * correctly updated after the right owner and group info is set.
142 * (Thanks to snabb@epipe.fi for pointing this out.) */
143 fd = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
146 /* In most cases parent directories will already exist because their
147 * information should have been previously transferred, but that may
148 * not be the case with -R */
149 if (fd == -1 && relative_paths && errno == ENOENT
150 && create_directory_path(fnametmp) == 0) {
151 /* Get back to name with XXXXXX in it. */
152 get_tmpname(fnametmp, fname);
153 fd = do_mkstemp(fnametmp, file->mode & INITACCESSPERMS);
158 rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
159 full_fname(fnametmp));
166 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
167 const char *fname, int fd, OFF_T total_size)
169 static char file_sum1[MAX_DIGEST_LEN];
170 struct map_struct *mapbuf;
171 struct sum_struct sum;
179 read_sum_head(f_in, &sum);
181 if (fd_r >= 0 && size_r > 0) {
182 int32 read_size = MAX(sum.blength * 2, 16*1024);
183 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
184 if (DEBUG_GTE(DELTASUM, 2)) {
185 rprintf(FINFO, "recv mapped %s of size %s\n",
186 fname_r, big_num(size_r));
191 sum_init(checksum_seed);
193 if (append_mode > 0) {
195 sum.flength = (OFF_T)sum.count * sum.blength;
197 sum.flength -= sum.blength - sum.remainder;
198 if (append_mode == 2) {
199 for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
200 if (INFO_GTE(PROGRESS, 1))
201 show_progress(offset, total_size);
202 sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
206 if (offset < sum.flength) {
207 int32 len = (int32)(sum.flength - offset);
208 if (INFO_GTE(PROGRESS, 1))
209 show_progress(offset, total_size);
210 sum_update(map_ptr(mapbuf, offset, len), len);
213 offset = sum.flength;
214 if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
215 rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
216 full_fname(fname), big_num(j), big_num(offset));
217 exit_cleanup(RERR_FILEIO);
221 while ((i = recv_token(f_in, &data)) != 0) {
222 if (INFO_GTE(PROGRESS, 1))
223 show_progress(offset, total_size);
226 if (DEBUG_GTE(DELTASUM, 3)) {
227 rprintf(FINFO,"data recv %d at %s\n",
231 stats.literal_data += i;
232 cleanup_got_literal = 1;
236 if (fd != -1 && write_file(fd,data,i) != i)
237 goto report_write_error;
243 offset2 = i * (OFF_T)sum.blength;
245 if (i == (int)sum.count-1 && sum.remainder != 0)
248 stats.matched_data += len;
250 if (DEBUG_GTE(DELTASUM, 3)) {
252 "chunk[%d] of size %ld at %s offset=%s\n",
253 i, (long)len, big_num(offset2), big_num(offset));
257 map = map_ptr(mapbuf,offset2,len);
260 sum_update(map, len);
263 if (updating_basis_or_equiv) {
264 if (offset == offset2 && fd != -1) {
266 if (flush_write_file(fd) < 0)
267 goto report_write_error;
269 if ((pos = do_lseek(fd, len, SEEK_CUR)) != offset) {
270 rsyserr(FERROR_XFER, errno,
271 "lseek of %s returned %s, not %s",
273 big_num(pos), big_num(offset));
274 exit_cleanup(RERR_FILEIO);
279 if (fd != -1 && map && write_file(fd, map, len) != (int)len)
280 goto report_write_error;
284 if (flush_write_file(fd) < 0)
285 goto report_write_error;
287 #ifdef HAVE_FTRUNCATE
288 if (inplace && fd != -1
289 && ftruncate(fd, offset) < 0) {
290 rsyserr(FERROR_XFER, errno, "ftruncate failed on %s",
295 if (INFO_GTE(PROGRESS, 1))
296 end_progress(total_size);
298 if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
300 rsyserr(FERROR_XFER, errno, "write failed on %s",
302 exit_cleanup(RERR_FILEIO);
305 if (sum_end(file_sum1) != checksum_len)
306 overflow_exit("checksum_len"); /* Impossible... */
311 read_buf(f_in, sender_file_sum, checksum_len);
312 if (DEBUG_GTE(DELTASUM, 2))
313 rprintf(FINFO,"got file_sum\n");
314 if (fd != -1 && memcmp(file_sum1, sender_file_sum, checksum_len) != 0)
320 static void discard_receive_data(int f_in, OFF_T length)
322 receive_data(f_in, NULL, -1, 0, NULL, -1, length);
325 static void handle_delayed_updates(char *local_name)
327 char *fname, *partialptr;
330 for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
331 struct file_struct *file = cur_flist->files[ndx];
332 fname = local_name ? local_name : f_name(file, NULL);
333 if ((partialptr = partial_dir_fname(fname)) != NULL) {
334 if (make_backups > 0 && !make_backup(fname))
336 if (DEBUG_GTE(RECV, 1)) {
337 rprintf(FINFO, "renaming %s to %s\n",
340 /* We don't use robust_rename() here because the
341 * partial-dir must be on the same drive. */
342 if (do_rename(partialptr, fname) < 0) {
343 rsyserr(FERROR_XFER, errno,
344 "rename failed for %s (from %s)",
345 full_fname(fname), partialptr);
347 if (remove_source_files
348 || (preserve_hard_links && F_IS_HLINKED(file)))
349 send_msg_int(MSG_SUCCESS, ndx);
350 handle_partial_dir(partialptr, PDIR_DELETE);
356 static void no_batched_update(int ndx, BOOL is_redo)
358 struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
359 struct file_struct *file = flist->files[ndx - flist->ndx_start];
361 rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
362 is_redo ? " resend of" : "", f_name(file, NULL));
365 send_msg_int(MSG_NO_SEND, ndx);
368 static int we_want_redo(int desired_ndx)
370 static int redo_ndx = -1;
372 while (redo_ndx < desired_ndx) {
374 no_batched_update(redo_ndx, True);
375 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
379 if (redo_ndx == desired_ndx) {
387 static int gen_wants_ndx(int desired_ndx)
389 static int next_ndx = -1;
390 static BOOL got_eof = 0;
395 while (next_ndx < desired_ndx) {
397 no_batched_update(next_ndx, False);
398 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
404 if (next_ndx == desired_ndx) {
413 * main routine for receiver process.
415 * Receiver process runs on the same host as the generator process. */
416 int recv_files(int f_in, char *local_name)
421 char *fname, fbuf[MAXPATHLEN];
422 char xname[MAXPATHLEN];
423 char fnametmp[MAXPATHLEN];
424 char *fnamecmp, *partialptr;
425 char fnamecmpbuf[MAXPATHLEN];
427 struct file_struct *file;
428 struct stats initial_stats;
429 int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
430 enum logcode log_code = log_before_transfer ? FLOG : FINFO;
431 int max_phase = protocol_version >= 29 ? 2 : 1;
432 int dflt_perms = (ACCESSPERMS & ~orig_umask);
434 const char *parent_dirname = "";
438 if (DEBUG_GTE(RECV, 1))
439 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
442 delayed_bits = bitbag_create(cur_flist->used + 1);
447 /* This call also sets cur_flist. */
448 ndx = read_ndx_and_attrs(f_in, &iflags, &fnamecmp_type,
450 if (ndx == NDX_DONE) {
451 if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
452 set_current_file_index(NULL, 0);
455 if (inc_recurse && first_flist) {
457 gen_wants_ndx(first_flist->used + first_flist->ndx_start);
458 flist_free(first_flist);
461 } else if (read_batch && first_flist)
462 gen_wants_ndx(first_flist->used);
463 if (++phase > max_phase)
465 if (DEBUG_GTE(RECV, 1))
466 rprintf(FINFO, "recv_files phase=%d\n", phase);
467 if (phase == 2 && delay_updates)
468 handle_delayed_updates(local_name);
469 send_msg(MSG_DONE, "", 0, 0);
473 if (ndx - cur_flist->ndx_start >= 0)
474 file = cur_flist->files[ndx - cur_flist->ndx_start];
476 file = dir_flist->files[cur_flist->parent_ndx];
477 fname = local_name ? local_name : f_name(file, fbuf);
479 if (DEBUG_GTE(RECV, 1))
480 rprintf(FINFO, "recv_files(%s)\n", fname);
482 #ifdef SUPPORT_XATTRS
483 if (iflags & ITEM_REPORT_XATTR && !dry_run)
484 recv_xattr_request(file, f_in);
487 if (!(iflags & ITEM_TRANSFER)) {
488 maybe_log_item(file, iflags, itemizing, xname);
489 #ifdef SUPPORT_XATTRS
490 if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && !dry_run)
491 set_file_attrs(fname, file, NULL, fname, 0);
493 if (iflags & ITEM_IS_NEW) {
494 stats.created_files++;
495 if (S_ISREG(file->mode)) {
496 /* Nothing further to count. */
497 } else if (S_ISDIR(file->mode))
498 stats.created_dirs++;
500 else if (S_ISLNK(file->mode))
501 stats.created_symlinks++;
503 else if (IS_DEVICE(file->mode))
504 stats.created_devices++;
506 stats.created_specials++;
512 "got transfer request in phase 2 [%s]\n",
514 exit_cleanup(RERR_PROTOCOL);
517 if (file->flags & FLAG_FILE_SENT) {
518 if (csum_length == SHORT_SUM_LENGTH) {
519 if (keep_partial && !partial_dir)
520 make_backups = -make_backups; /* prevents double backup */
522 sparse_files = -sparse_files;
523 append_mode = -append_mode;
524 csum_length = SUM_LENGTH;
528 if (csum_length != SHORT_SUM_LENGTH) {
529 if (keep_partial && !partial_dir)
530 make_backups = -make_backups;
532 sparse_files = -sparse_files;
533 append_mode = -append_mode;
534 csum_length = SHORT_SUM_LENGTH;
537 if (iflags & ITEM_IS_NEW)
538 stats.created_files++;
541 if (!am_server && INFO_GTE(PROGRESS, 1))
542 set_current_file_index(file, ndx);
543 stats.xferred_files++;
544 stats.total_transferred_size += F_LENGTH(file);
546 cleanup_got_literal = 0;
548 if (daemon_filter_list.head
549 && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
550 rprintf(FERROR, "attempt to hack rsync failed.\n");
551 exit_cleanup(RERR_PROTOCOL);
554 if (!do_xfers) { /* log the transfer */
555 log_item(FCLIENT, file, &stats, iflags, NULL);
557 discard_receive_data(f_in, F_LENGTH(file));
560 if (write_batch < 0) {
561 log_item(FCLIENT, file, &stats, iflags, NULL);
563 discard_receive_data(f_in, F_LENGTH(file));
568 if (!(redoing ? we_want_redo(ndx) : gen_wants_ndx(ndx))) {
570 "(Skipping batched update for%s \"%s\")\n",
571 redoing ? " resend of" : "",
573 discard_receive_data(f_in, F_LENGTH(file));
574 file->flags |= FLAG_FILE_SENT;
579 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
581 if (protocol_version >= 29) {
582 switch (fnamecmp_type) {
586 case FNAMECMP_PARTIAL_DIR:
587 fnamecmp = partialptr;
589 case FNAMECMP_BACKUP:
590 fnamecmp = get_backup_name(fname);
594 pathjoin(fnamecmpbuf, MAXPATHLEN,
595 file->dirname, xname);
596 fnamecmp = fnamecmpbuf;
601 if (fnamecmp_type >= basis_dir_cnt) {
603 "invalid basis_dir index: %d.\n",
605 exit_cleanup(RERR_PROTOCOL);
607 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
608 basis_dir[fnamecmp_type], fname);
609 fnamecmp = fnamecmpbuf;
612 if (!fnamecmp || (daemon_filter_list.head
613 && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0)) {
615 fnamecmp_type = FNAMECMP_FNAME;
618 /* Reminder: --inplace && --partial-dir are never
619 * enabled at the same time. */
620 if (inplace && make_backups > 0) {
621 if (!(fnamecmp = get_backup_name(fname)))
624 fnamecmp_type = FNAMECMP_BACKUP;
625 } else if (partial_dir && partialptr)
626 fnamecmp = partialptr;
631 initial_stats = stats;
634 fd1 = do_open(fnamecmp, O_RDONLY, 0);
636 if (fd1 == -1 && protocol_version < 29) {
637 if (fnamecmp != fname) {
639 fd1 = do_open(fnamecmp, O_RDONLY, 0);
642 if (fd1 == -1 && basis_dir[0]) {
643 /* pre-29 allowed only one alternate basis */
644 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
645 basis_dir[0], fname);
646 fnamecmp = fnamecmpbuf;
647 fd1 = do_open(fnamecmp, O_RDONLY, 0);
651 updating_basis_or_equiv = inplace
652 && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP);
657 } else if (do_fstat(fd1,&st) != 0) {
658 rsyserr(FERROR_XFER, errno, "fstat %s failed",
659 full_fname(fnamecmp));
660 discard_receive_data(f_in, F_LENGTH(file));
663 send_msg_int(MSG_NO_SEND, ndx);
667 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
668 /* this special handling for directories
669 * wouldn't be necessary if robust_rename()
670 * and the underlying robust_unlink could cope
673 rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
674 full_fname(fnamecmp));
675 discard_receive_data(f_in, F_LENGTH(file));
678 send_msg_int(MSG_NO_SEND, ndx);
682 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
687 /* If we're not preserving permissions, change the file-list's
688 * mode based on the local permissions and some heuristics. */
689 if (!preserve_perms) {
690 int exists = fd1 != -1;
692 const char *dn = file->dirname ? file->dirname : ".";
693 if (parent_dirname != dn
694 && strcmp(parent_dirname, dn) != 0) {
695 dflt_perms = default_perms_for_dir(dn);
699 file->mode = dest_mode(file->mode, st.st_mode,
703 /* We now check to see if we are writing the file "inplace" */
705 fd2 = do_open(fname, O_WRONLY|O_CREAT, 0600);
707 rsyserr(FERROR_XFER, errno, "open %s failed",
711 fd2 = open_tmpfile(fnametmp, fname, file);
713 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
717 discard_receive_data(f_in, F_LENGTH(file));
721 send_msg_int(MSG_NO_SEND, ndx);
725 /* log the transfer */
726 if (log_before_transfer)
727 log_item(FCLIENT, file, &initial_stats, iflags, NULL);
728 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
729 rprintf(FINFO, "%s\n", fname);
732 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
733 fname, fd2, F_LENGTH(file));
735 log_item(log_code, file, &initial_stats, iflags, NULL);
739 if (close(fd2) < 0) {
740 rsyserr(FERROR, errno, "close failed on %s",
741 full_fname(fnametmp));
742 exit_cleanup(RERR_FILEIO);
745 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
746 if (partialptr == fname)
748 if (!finish_transfer(fname, fnametmp, fnamecmp,
749 partialptr, file, recv_ok, 1))
751 else if (fnamecmp == partialptr) {
752 do_unlink(partialptr);
753 handle_partial_dir(partialptr, PDIR_DELETE);
755 } else if (keep_partial && partialptr) {
756 if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
758 "Unable to create partial-dir for %s -- discarding %s.\n",
759 local_name ? local_name : f_name(file, NULL),
760 recv_ok ? "completed file" : "partial file");
763 } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
764 file, recv_ok, !partial_dir))
766 else if (delay_updates && recv_ok) {
767 bitbag_set_bit(delayed_bits, ndx);
777 file->flags |= FLAG_FILE_SENT;
783 if (remove_source_files || inc_recurse
784 || (preserve_hard_links && F_IS_HLINKED(file)))
785 send_msg_int(MSG_SUCCESS, ndx);
788 enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
789 if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
790 char *errstr, *redostr, *keptstr;
791 if (!(keep_partial && partialptr) && !inplace)
792 keptstr = "discarded";
793 else if (partial_dir)
794 keptstr = "put into partial-dir";
796 keptstr = "retained";
797 if (msgtype == FERROR_XFER) {
802 redostr = read_batch ? " (may try again)"
803 : " (will try again)";
806 "%s: %s failed verification -- update %s%s.\n",
807 errstr, local_name ? f_name(file, NULL) : fname,
812 flist_ndx_push(&batch_redo_list, ndx);
813 send_msg_int(MSG_REDO, ndx);
814 file->flags |= FLAG_FILE_SENT;
815 } else if (inc_recurse)
816 send_msg_int(MSG_NO_SEND, ndx);
821 send_msg_int(MSG_NO_SEND, ndx);
825 if (make_backups < 0)
826 make_backups = -make_backups;
828 if (phase == 2 && delay_updates) /* for protocol_version < 29 */
829 handle_delayed_updates(local_name);
832 read_int(batch_gen_fd); /* Discard -1 */
833 read_del_stats(batch_gen_fd);
836 if (DEBUG_GTE(RECV, 1))
837 rprintf(FINFO,"recv_files finished\n");