1 /* -*- c-file-style: "linux" -*-
3 rsync -- fast file replication program
5 Copyright (C) 1996-2000 by Andrew Tridgell
6 Copyright (C) Paul Mackerras 1996
7 Copyright (C) 2002 by Martin Pool <mbp@samba.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 extern int log_format_has_i;
29 extern int log_format_has_o_or_i;
30 extern int daemon_log_format_has_i;
35 extern int relative_paths;
36 extern int keep_dirlinks;
37 extern int preserve_links;
38 extern int preserve_devices;
39 extern int preserve_hard_links;
40 extern int preserve_perms;
41 extern int preserve_uid;
42 extern int preserve_gid;
43 extern int preserve_times;
44 extern int omit_dir_times;
45 extern int delete_before;
46 extern int delete_during;
47 extern int delete_after;
49 extern int ignore_errors;
50 extern int remove_sent_files;
51 extern int update_only;
52 extern int opt_ignore_existing;
54 extern int make_backups;
55 extern int csum_length;
56 extern int ignore_times;
58 extern OFF_T max_size;
59 extern int io_timeout;
61 extern int ignore_timeout;
62 extern int protocol_version;
63 extern int fuzzy_basis;
64 extern int always_checksum;
65 extern char *partial_dir;
66 extern char *basis_dir[];
67 extern int compare_dest;
69 extern int whole_file;
70 extern int local_server;
72 extern int read_batch;
73 extern int only_existing;
74 extern int orig_umask;
75 extern int safe_symlinks;
76 extern long block_size; /* "long" because popt can't set an int32. */
77 extern int max_delete;
78 extern int force_delete;
79 extern int one_file_system;
80 extern struct stats stats;
81 extern dev_t filesystem_dev;
82 extern char *backup_dir;
83 extern char *backup_suffix;
84 extern int backup_suffix_len;
86 extern struct filter_list_struct server_filter_list;
88 static int deletion_count = 0; /* used to implement --max-delete */
91 static int is_backup_file(char *fn)
93 int k = strlen(fn) - backup_suffix_len;
94 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
98 /* Delete a file or directory. If DEL_FORCE_RECURSE is set in the flags, or if
99 * force_delete is set, this will delete recursively as long as DEL_NO_RECURSE
100 * is not set in the flags. */
101 static int delete_item(char *fname, int mode, int flags)
103 struct file_list *dirlist;
104 char buf[MAXPATHLEN];
105 int j, dlen, zap_dir, ok;
108 if (max_delete && deletion_count >= max_delete)
111 if (!S_ISDIR(mode)) {
112 if (make_backups && (backup_dir || !is_backup_file(fname)))
113 ok = make_backup(fname);
115 ok = robust_unlink(fname) == 0;
117 if (!(flags & DEL_TERSE))
118 log_delete(fname, mode);
124 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
129 zap_dir = (flags & DEL_FORCE_RECURSE || (force_delete && recurse))
130 && !(flags & DEL_NO_RECURSE);
131 if (dry_run && zap_dir) {
134 } else if (make_backups && !backup_dir && !is_backup_file(fname)
135 && !(flags & DEL_FORCE_RECURSE))
136 ok = make_backup(fname);
138 ok = do_rmdir(fname) == 0;
140 if (!(flags & DEL_TERSE))
141 log_delete(fname, mode);
147 if (!zap_dir || (errno != ENOTEMPTY && errno != EEXIST)) {
148 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
152 flags |= DEL_FORCE_RECURSE; /* mark subdir dels as not "in the way" */
154 dlen = strlcpy(buf, fname, MAXPATHLEN);
155 save_filters = push_local_filters(buf, dlen);
157 dirlist = get_dirlist(buf, dlen, 0);
158 for (j = dirlist->count; j--; ) {
159 struct file_struct *fp = dirlist->files[j];
161 if (fp->flags & FLAG_MOUNT_POINT)
165 if (delete_item(buf, fp->mode, flags & ~DEL_TERSE) != 0) {
172 pop_local_filters(save_filters);
174 if (max_delete && deletion_count >= max_delete)
177 if (do_rmdir(fname) == 0) {
178 if (!(flags & DEL_TERSE))
179 log_delete(fname, mode);
181 } else if (errno != ENOTEMPTY && errno != ENOENT) {
182 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
191 /* This function is used to implement per-directory deletion, and is used by
192 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
193 * MAXPATHLEN buffer with the name of the directory in it (the functions we
194 * call will append names onto the end, but the old dir value will be restored
196 static void delete_in_dir(struct file_list *flist, char *fbuf,
197 struct file_struct *file, int allowed_lull)
199 static int min_depth = MAXPATHLEN, cur_depth = -1;
200 static void *filt_array[MAXPATHLEN/2+1];
201 struct file_list *dirlist;
202 char delbuf[MAXPATHLEN];
207 while (cur_depth >= min_depth)
208 pop_local_filters(filt_array[cur_depth--]);
209 min_depth = MAXPATHLEN;
215 rprintf(FINFO, "delete_in_dir(%s)\n", safe_fname(fbuf));
218 maybe_send_keepalive(allowed_lull, flist->count);
220 if (file->dir.depth >= MAXPATHLEN/2+1)
221 return; /* Impossible... */
223 if (max_delete && deletion_count >= max_delete)
226 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
228 "IO error encountered -- skipping file deletion\n");
229 max_delete = -1; /* avoid duplicating the above warning */
233 while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
234 pop_local_filters(filt_array[cur_depth--]);
235 cur_depth = file->dir.depth;
236 if (min_depth > cur_depth)
237 min_depth = cur_depth;
239 filt_array[cur_depth] = push_local_filters(fbuf, dlen);
241 if (link_stat(fbuf, &st, keep_dirlinks) < 0)
244 if (one_file_system && file->flags & FLAG_TOP_DIR)
245 filesystem_dev = st.st_dev;
247 dirlist = get_dirlist(fbuf, dlen, 0);
249 /* If an item in dirlist is not found in flist, delete it
250 * from the filesystem. */
251 for (i = dirlist->count; i--; ) {
252 if (!dirlist->files[i]->basename)
254 if (flist_find(flist, dirlist->files[i]) < 0) {
255 int mode = dirlist->files[i]->mode;
256 f_name_to(dirlist->files[i], delbuf);
257 if (delete_item(delbuf, mode, DEL_FORCE_RECURSE) < 0)
265 /* This deletes any files on the receiving side that are not present on the
266 * sending side. This is used by --delete-before and --delete-after. */
267 static void do_delete_pass(struct file_list *flist, int allowed_lull)
269 char fbuf[MAXPATHLEN];
272 for (j = 0; j < flist->count; j++) {
273 struct file_struct *file = flist->files[j];
275 if (!(file->flags & FLAG_DEL_HERE))
278 f_name_to(file, fbuf);
279 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
280 rprintf(FINFO, "deleting in %s\n", safe_fname(fbuf));
282 delete_in_dir(flist, fbuf, file, allowed_lull);
286 static int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
289 && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
292 if (am_root && preserve_uid && st->st_uid != file->uid)
295 if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
302 static void itemize(struct file_struct *file, int statret, STRUCT_STAT *st,
303 int32 iflags, int f_out, int ndx)
306 if (S_ISREG(file->mode) && file->length != st->st_size)
307 iflags |= ITEM_REPORT_SIZE;
308 if (!(iflags & ITEM_NO_DEST_AND_NO_UPDATE)) {
309 int keep_time = !preserve_times ? 0
310 : S_ISDIR(file->mode) ? !omit_dir_times
311 : !S_ISLNK(file->mode);
313 if ((iflags & ITEM_UPDATING && !keep_time)
314 || (keep_time && file->modtime != st->st_mtime))
315 iflags |= ITEM_REPORT_TIME;
316 if (preserve_perms && file->mode != st->st_mode)
317 iflags |= ITEM_REPORT_PERMS;
318 if (preserve_uid && am_root && file->uid != st->st_uid)
319 iflags |= ITEM_REPORT_OWNER;
320 if (preserve_gid && file->gid != GID_NONE
321 && st->st_gid != file->gid)
322 iflags |= ITEM_REPORT_GROUP;
325 iflags |= ITEM_IS_NEW | ITEM_UPDATING;
328 if ((iflags || verbose > 1) && !read_batch) {
329 if (protocol_version >= 29) {
331 write_int(f_out, ndx);
332 write_shortint(f_out, iflags);
334 log_recv(file, &stats, iflags);
339 /* Perform our quick-check heuristic for determining if a file is unchanged. */
340 static int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
342 if (st->st_size != file->length)
345 /* if always checksum is set then we use the checksum instead
346 of the file time to determine whether to sync */
347 if (always_checksum && S_ISREG(st->st_mode)) {
348 char sum[MD4_SUM_LENGTH];
349 file_checksum(fn, sum, st->st_size);
350 return memcmp(sum, file->u.sum, protocol_version < 21 ? 2
351 : MD4_SUM_LENGTH) == 0;
360 return cmp_modtime(st->st_mtime, file->modtime) == 0;
365 * set (initialize) the size entries in the per-file sum_struct
366 * calculating dynamic block and checksum sizes.
368 * This is only called from generate_and_send_sums() but is a separate
369 * function to encapsulate the logic.
371 * The block size is a rounded square root of file length.
373 * The checksum size is determined according to:
374 * blocksum_bits = BLOCKSUM_EXP + 2*log2(file_len) - log2(block_len)
375 * provided by Donovan Baarda which gives a probability of rsync
376 * algorithm corrupting data and falling back using the whole md4
379 * This might be made one of several selectable heuristics.
381 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
387 blength = block_size;
388 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
389 blength = BLOCK_SIZE;
394 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
395 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
396 blength = MAX_BLOCK_SIZE;
401 if (len < (int64)blength * blength)
404 } while (c >= 8); /* round to multiple of 8 */
405 blength = MAX(blength, BLOCK_SIZE);
409 if (protocol_version < 27) {
410 s2length = csum_length;
411 } else if (csum_length == SUM_LENGTH) {
412 s2length = SUM_LENGTH;
416 int b = BLOCKSUM_BIAS;
417 for (l = len; l >>= 1; b += 2) {}
418 for (c = blength; c >>= 1 && b; b--) {}
419 /* add a bit, subtract rollsum, round up. */
420 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
421 s2length = MAX(s2length, csum_length);
422 s2length = MIN(s2length, SUM_LENGTH);
426 sum->blength = blength;
427 sum->s2length = s2length;
428 sum->count = (len + (blength - 1)) / blength;
429 sum->remainder = (len % blength);
431 if (sum->count && verbose > 2) {
433 "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
434 (double)sum->count, (long)sum->remainder, (long)sum->blength,
435 sum->s2length, (double)sum->flength);
441 * Generate and send a stream of signatures/checksums that describe a buffer
443 * Generate approximately one checksum every block_len bytes.
445 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
448 struct map_struct *mapbuf;
449 struct sum_struct sum;
452 sum_sizes_sqroot(&sum, len);
455 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
459 write_sum_head(f_out, &sum);
461 for (i = 0; i < sum.count; i++) {
462 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
463 char *map = map_ptr(mapbuf, offset, n1);
464 uint32 sum1 = get_checksum1(map, n1);
465 char sum2[SUM_LENGTH];
468 full_write(f_copy, map, n1);
470 get_checksum2(map, n1, sum2);
474 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
475 (double)i, (double)offset, (long)n1,
476 (unsigned long)sum1);
478 write_int(f_out, sum1);
479 write_buf(f_out, sum2, sum.s2length);
489 /* Try to find a filename in the same dir as "fname" with a similar name. */
490 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
492 int fname_len, fname_suf_len;
493 const char *fname_suf, *fname = file->basename;
494 uint32 lowest_dist = 0x7FFFFFFF;
495 int j, lowest_j = -1;
497 fname_len = strlen(fname);
498 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
500 for (j = 0; j < dirlist->count; j++) {
501 struct file_struct *fp = dirlist->files[j];
502 const char *suf, *name;
506 if (!S_ISREG(fp->mode) || !fp->length
507 || fp->flags & FLAG_NO_FUZZY)
512 if (fp->length == file->length
513 && fp->modtime == file->modtime) {
516 "fuzzy size/modtime match for %s\n",
523 suf = find_filename_suffix(name, len, &suf_len);
525 dist = fuzzy_distance(name, len, fname, fname_len);
526 /* Add some extra weight to how well the suffixes match. */
527 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
530 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
531 name, (int)(dist>>16), (int)(dist&0xFFFF));
533 if (dist <= lowest_dist) {
543 /* Acts on flist->file's ndx'th item, whose name is fname. If a directory,
544 * make sure it exists, and has the right permissions/timestamp info. For
545 * all other non-regular files (symlinks, etc.) we create them here. For
546 * regular files that have changed, we try to find a basis file and then
547 * start sending checksums.
549 * Note that f_out is set to -1 when doing final directory-permission and
550 * modification-time repair. */
551 static void recv_generator(char *fname, struct file_list *flist,
552 struct file_struct *file, int ndx,
553 int itemizing, int maybe_PERMS_REPORT,
554 enum logcode code, int allowed_lull,
555 int f_out, int f_out_name)
557 static int missing_below = -1, excluded_below = -1;
558 static char *fuzzy_dirname = NULL;
559 static struct file_list *fuzzy_dirlist = NULL;
560 struct file_struct *fuzzy_file = NULL;
561 int fd = -1, f_copy = -1;
562 STRUCT_STAT st, partial_st;
563 struct file_struct *back_file = NULL;
564 int statret, stat_errno;
565 char *fnamecmp, *partialptr, *backupptr = NULL;
566 char fnamecmpbuf[MAXPATHLEN];
574 flist_free(fuzzy_dirlist);
575 fuzzy_dirlist = NULL;
576 fuzzy_dirname = NULL;
578 if (missing_below >= 0) {
586 rprintf(FINFO, "recv_generator(%s,%d)\n",
587 safe_fname(fname), ndx);
590 if (server_filter_list.head) {
591 if (excluded_below >= 0) {
592 if (file->dir.depth > excluded_below)
596 if (check_filter(&server_filter_list, fname,
597 S_ISDIR(file->mode)) < 0) {
598 if (S_ISDIR(file->mode))
599 excluded_below = file->dir.depth;
603 "skipping server-excluded file \"%s\"\n",
610 if (missing_below >= 0 && file->dir.depth <= missing_below) {
618 if (fuzzy_basis && S_ISREG(file->mode)) {
619 char *dn = file->dirname ? file->dirname : ".";
620 /* Yes, identical dirnames are guaranteed to have
621 * identical pointers at this point. */
622 if (fuzzy_dirname != dn) {
624 flist_free(fuzzy_dirlist);
626 fuzzy_dirlist = get_dirlist(fuzzy_dirname, -1,
631 statret = link_stat(fname, &st,
632 keep_dirlinks && S_ISDIR(file->mode));
636 if (only_existing && statret == -1 && stat_errno == ENOENT) {
637 /* we only want to update existing files */
639 rprintf(FINFO, "not creating new file \"%s\"\n",
645 if (statret == 0 && !preserve_perms
646 && S_ISDIR(st.st_mode) == S_ISDIR(file->mode)) {
647 /* if the file exists already and we aren't perserving
648 * permissions then act as though the remote end sent
649 * us the file permissions we already have */
650 file->mode = (file->mode & ~CHMOD_BITS)
651 | (st.st_mode & CHMOD_BITS);
654 if (S_ISDIR(file->mode)) {
655 /* The file to be received is a directory, so we need
656 * to prepare appropriately. If there is already a
657 * file of that name and it is *not* a directory, then
658 * we need to delete it. If it doesn't exist, then
659 * (perhaps recursively) create it. */
660 if (statret == 0 && !S_ISDIR(st.st_mode)) {
661 delete_item(fname, st.st_mode, DEL_TERSE);
664 if (dry_run && statret != 0 && missing_below < 0) {
665 missing_below = file->dir.depth;
668 if (itemizing && f_out != -1)
669 itemize(file, statret, &st, 0, f_out, ndx);
670 if (statret != 0 && do_mkdir(fname,file->mode) != 0 && errno != EEXIST) {
671 if (!relative_paths || errno != ENOENT
672 || create_directory_path(fname, orig_umask) < 0
673 || do_mkdir(fname, file->mode) < 0) {
674 rsyserr(FERROR, errno,
675 "recv_generator: mkdir %s failed",
679 if (set_perms(fname, file, statret ? NULL : &st, 0)
680 && verbose && code && f_out != -1)
681 rprintf(code, "%s/\n", safe_fname(fname));
682 if (delete_during && f_out != -1 && csum_length != SUM_LENGTH
683 && (file->flags & FLAG_DEL_HERE))
684 delete_in_dir(flist, fname, file, allowed_lull);
688 if (max_size && file->length > max_size) {
690 rprintf(FINFO, "%s is over max-size\n",
696 if (preserve_links && S_ISLNK(file->mode)) {
698 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
701 "ignoring unsafe symlink %s -> \"%s\"\n",
703 safe_fname(file->u.link));
708 char lnk[MAXPATHLEN];
711 if (!S_ISDIR(st.st_mode)
712 && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
714 /* A link already pointing to the
715 * right place -- no further action
717 if (strcmp(lnk, file->u.link) == 0) {
719 itemize(file, 0, &st, 0,
722 set_perms(fname, file, &st,
727 /* Not the right symlink (or not a symlink), so
729 if (S_ISLNK(st.st_mode))
730 delete_item(fname, st.st_mode, DEL_TERSE);
732 delete_item(fname, st.st_mode, DEL_TERSE);
736 if (do_symlink(file->u.link,fname) != 0) {
737 rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
738 full_fname(fname), safe_fname(file->u.link));
740 set_perms(fname,file,NULL,0);
742 itemize(file, statret, &st, ITEM_UPDATING,
745 if (code && verbose) {
746 rprintf(code, "%s -> %s\n", safe_fname(fname),
747 safe_fname(file->u.link));
749 if (remove_sent_files && !dry_run) {
751 SIVAL(numbuf, 0, ndx);
752 send_msg(MSG_SUCCESS, numbuf, 4);
759 if (am_root && preserve_devices && IS_DEVICE(file->mode)) {
761 st.st_mode != file->mode ||
762 st.st_rdev != file->u.rdev) {
763 delete_item(fname, st.st_mode, DEL_TERSE);
764 if (!IS_DEVICE(st.st_mode))
767 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
769 (int)file->mode, (int)file->u.rdev);
771 if (do_mknod(fname,file->mode,file->u.rdev) != 0) {
772 rsyserr(FERROR, errno, "mknod %s failed",
775 set_perms(fname,file,NULL,0);
777 itemize(file, statret, &st, ITEM_UPDATING,
780 if (code && verbose) {
781 rprintf(code, "%s\n",
787 itemize(file, statret, &st, 0,
790 set_perms(fname, file, &st, maybe_PERMS_REPORT);
795 if (preserve_hard_links && hard_link_check(file, HL_CHECK_MASTER))
798 if (!S_ISREG(file->mode)) {
799 rprintf(FINFO, "skipping non-regular file \"%s\"\n",
804 if (opt_ignore_existing && statret == 0) {
806 rprintf(FINFO, "%s exists\n", safe_fname(fname));
810 if (update_only && statret == 0
811 && cmp_modtime(st.st_mtime, file->modtime) > 0) {
813 rprintf(FINFO, "%s is newer\n", safe_fname(fname));
818 fnamecmp_type = FNAMECMP_FNAME;
820 if (statret != 0 && basis_dir[0] != NULL) {
825 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
826 basis_dir[i], fname);
827 if (link_stat(fnamecmpbuf, &st, 0) < 0
828 || !S_ISREG(st.st_mode))
830 switch (match_level) {
836 if (!unchanged_file(fnamecmpbuf, file, &st))
842 if (!unchanged_attrs(file, &st))
849 } while (basis_dir[++i] != NULL);
852 if (i != best_match) {
854 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
855 basis_dir[i], fname);
856 if (link_stat(fnamecmpbuf, &st, 0) < 0) {
863 if (link_dest && match_level == 3
864 && do_link(fnamecmpbuf, fname) < 0) {
866 rsyserr(FINFO, errno, "link %s => %s",
867 full_fname(fnamecmpbuf),
873 if (compare_dest || (match_level && match_level < 3)) {
874 fnamecmp = fnamecmpbuf;
880 if (statret == 0 && !S_ISREG(st.st_mode)) {
881 if (delete_item(fname, st.st_mode, DEL_TERSE) != 0)
887 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
888 && link_stat(partialptr, &partial_st, 0) == 0
889 && S_ISREG(partial_st.st_mode)) {
891 goto prepare_to_open;
895 if (statret != 0 && fuzzy_basis && dry_run <= 1) {
896 int j = find_fuzzy(file, fuzzy_dirlist);
898 fuzzy_file = fuzzy_dirlist->files[j];
899 f_name_to(fuzzy_file, fnamecmpbuf);
901 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
902 safe_fname(fname), safe_fname(fnamecmpbuf));
904 st.st_mode = fuzzy_file->mode;
905 st.st_size = fuzzy_file->length;
906 st.st_mtime = fuzzy_file->modtime;
908 fnamecmp = fnamecmpbuf;
909 fnamecmp_type = FNAMECMP_FUZZY;
914 if (preserve_hard_links && hard_link_check(file, HL_SKIP))
916 if (stat_errno == ENOENT)
919 rsyserr(FERROR, stat_errno,
920 "recv_generator: failed to stat %s",
926 if (!compare_dest && fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
928 else if (fnamecmp_type == FNAMECMP_FUZZY)
930 else if (unchanged_file(fnamecmp, file, &st)) {
931 if (fnamecmp_type == FNAMECMP_FNAME) {
933 itemize(file, statret, &st, 0, f_out, ndx);
934 set_perms(fname, file, &st, maybe_PERMS_REPORT);
937 /* Only --compare-dest gets here. */
938 if (unchanged_attrs(file, &st)) {
939 itemize(file, statret, &st, ITEM_NO_DEST_AND_NO_UPDATE,
948 fnamecmp = partialptr;
949 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
953 if (dry_run || read_batch || whole_file)
957 int j = flist_find(fuzzy_dirlist, file);
958 if (j >= 0) /* don't use changing file as future fuzzy basis */
959 fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
963 fd = do_open(fnamecmp, O_RDONLY, 0);
966 rsyserr(FERROR, errno, "failed to open %s, continuing",
967 full_fname(fnamecmp));
969 /* pretend the file didn't exist */
970 if (preserve_hard_links && hard_link_check(file, HL_SKIP))
976 if (inplace && make_backups) {
977 if (!(backupptr = get_backup_name(fname))) {
981 if (!(back_file = make_file(fname, NULL, NO_FILTERS))) {
983 goto pretend_missing;
985 if (robust_unlink(backupptr) && errno != ENOENT) {
986 rsyserr(FERROR, errno, "unlink %s",
987 full_fname(backupptr));
992 if ((f_copy = do_open(backupptr,
993 O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
994 rsyserr(FERROR, errno, "open %s",
995 full_fname(backupptr));
1000 fnamecmp_type = FNAMECMP_BACKUP;
1004 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1005 safe_fname(fnamecmp), (double)st.st_size);
1009 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1012 write_int(f_out, ndx);
1014 int iflags = ITEM_UPDATING;
1015 if (always_checksum)
1016 iflags |= ITEM_REPORT_CHECKSUM;
1017 if (fnamecmp_type != FNAMECMP_FNAME)
1018 iflags |= ITEM_USING_ALT_BASIS;
1019 itemize(file, statret, &st, iflags, f_out, -1);
1021 if (f_out_name >= 0) {
1022 write_byte(f_out_name, fnamecmp_type);
1023 if (fnamecmp_type == FNAMECMP_FUZZY) {
1024 write_vstring(f_out_name, fuzzy_file->basename,
1025 strlen(fuzzy_file->basename));
1029 if (dry_run || read_batch)
1032 if (statret != 0 || whole_file) {
1033 write_sum_head(f_out, NULL);
1037 generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1041 set_perms(backupptr, back_file, NULL, 0);
1043 rprintf(FINFO, "backed up %s to %s\n",
1044 safe_fname(fname), safe_fname(backupptr));
1053 void generate_files(int f_out, struct file_list *flist, char *local_name,
1058 char fbuf[MAXPATHLEN];
1059 int itemizing, maybe_PERMS_REPORT;
1061 int need_retouch_dir_times = preserve_times && !omit_dir_times;
1062 int need_retouch_dir_perms = 0;
1063 int save_only_existing = only_existing;
1064 int save_opt_ignore_existing = opt_ignore_existing;
1065 int allowed_lull = read_batch ? 0 : (io_timeout + 1) / 2;
1066 int lull_mod = allowed_lull * 5;
1068 if (protocol_version >= 29) {
1070 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1071 code = daemon_log_format_has_i ? 0 : FLOG;
1072 } else if (am_daemon) {
1073 itemizing = daemon_log_format_has_i && !dry_run;
1074 maybe_PERMS_REPORT = PERMS_REPORT;
1075 code = itemizing || dry_run ? FCLIENT : FINFO;
1076 } else if (!am_server) {
1077 itemizing = log_format_has_i;
1078 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1079 code = itemizing ? 0 : FINFO;
1082 maybe_PERMS_REPORT = PERMS_REPORT;
1087 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1088 (long)getpid(), flist->count);
1091 if (delete_before && !local_name && flist->count > 0)
1092 do_delete_pass(flist, allowed_lull);
1097 rprintf(FINFO, "delta-transmission %s\n",
1099 ? "disabled for local transfer or --whole-file"
1103 if (protocol_version < 29)
1106 for (i = 0; i < flist->count; i++) {
1107 struct file_struct *file = flist->files[i];
1108 struct file_struct copy;
1110 if (!file->basename)
1113 /* We need to ensure that any dirs we create have writeable
1114 * permissions during the time we are putting files within
1115 * them. This is then fixed after the transfer is done. */
1116 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)) {
1118 copy.mode |= S_IWUSR; /* user write */
1120 need_retouch_dir_perms = 1;
1123 recv_generator(local_name ? local_name : f_name_to(file, fbuf),
1124 flist, file, i, itemizing, maybe_PERMS_REPORT,
1125 code, allowed_lull, f_out, f_out_name);
1127 if (allowed_lull && !(i % lull_mod))
1128 maybe_send_keepalive(allowed_lull, flist->count);
1130 recv_generator(NULL, NULL, NULL, 0, 0, 0, code, 0, -1, -1);
1132 delete_in_dir(NULL, NULL, NULL, 0);
1135 csum_length = SUM_LENGTH;
1136 only_existing = max_size = opt_ignore_existing = 0;
1137 update_only = always_checksum = size_only = 0;
1139 make_backups = 0; /* avoid a duplicate backup for inplace processing */
1141 /* We expect to just sit around now, so don't exit on a timeout.
1142 * If we really get a timeout then the other process should exit. */
1146 rprintf(FINFO,"generate_files phase=%d\n",phase);
1148 write_int(f_out, -1);
1150 /* files can cycle through the system more than once
1151 * to catch initial checksum errors */
1152 while ((i = get_redo_num()) != -1) {
1153 struct file_struct *file = flist->files[i];
1154 recv_generator(local_name ? local_name : f_name_to(file, fbuf),
1155 flist, file, i, itemizing, maybe_PERMS_REPORT,
1156 code, allowed_lull, f_out, f_out_name);
1160 only_existing = save_only_existing;
1161 opt_ignore_existing = save_opt_ignore_existing;
1164 rprintf(FINFO,"generate_files phase=%d\n",phase);
1166 write_int(f_out, -1);
1168 /* Read post-redo-phase MSG_DONE and any prior messages. */
1171 if (preserve_hard_links)
1172 do_hard_links(allowed_lull, flist->count);
1174 if (delete_after && !local_name && flist->count > 0)
1175 do_delete_pass(flist, allowed_lull);
1177 if ((need_retouch_dir_perms || need_retouch_dir_times)
1178 && !list_only && !local_name && !dry_run) {
1180 /* Now we need to fix any directory permissions that were
1181 * modified during the transfer and/or re-set any tweaked
1182 * modified-time values. */
1183 for (i = 0; i < flist->count; i++) {
1184 struct file_struct *file = flist->files[i];
1185 if (!file->basename || !S_ISDIR(file->mode))
1187 if (!need_retouch_dir_times && file->mode & S_IWUSR)
1189 recv_generator(local_name ? local_name : f_name(file),
1190 flist, file, i, itemizing,
1191 maybe_PERMS_REPORT, code, allowed_lull,
1193 if (allowed_lull && !(j++ % lull_mod))
1194 maybe_send_keepalive(allowed_lull, flist->count);
1197 recv_generator(NULL, NULL, NULL, 0, 0, 0, code, 0, -1, -1);
1200 rprintf(FINFO,"generate_files finished\n");