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.
29 extern int log_format_has_i;
30 extern int log_format_has_o_or_i;
31 extern int daemon_log_format_has_i;
35 extern int do_progress;
37 extern int relative_paths;
38 extern int keep_dirlinks;
39 extern int preserve_links;
40 extern int preserve_devices;
41 extern int preserve_hard_links;
42 extern int preserve_perms;
43 extern int preserve_uid;
44 extern int preserve_gid;
45 extern int preserve_times;
46 extern int omit_dir_times;
47 extern int delete_before;
48 extern int delete_during;
49 extern int delete_after;
51 extern int ignore_errors;
52 extern int remove_sent_files;
53 extern int delay_updates;
54 extern int update_only;
55 extern int opt_ignore_existing;
57 extern int make_backups;
58 extern int csum_length;
59 extern int ignore_times;
61 extern OFF_T max_size;
63 extern int allowed_lull;
64 extern int sock_f_out;
65 extern int ignore_timeout;
66 extern int protocol_version;
67 extern int fuzzy_basis;
68 extern int always_checksum;
69 extern char *partial_dir;
70 extern char *basis_dir[];
71 extern int compare_dest;
74 extern int whole_file;
76 extern int read_batch;
77 extern int only_existing;
78 extern int orig_umask;
79 extern int safe_symlinks;
80 extern long block_size; /* "long" because popt can't set an int32. */
81 extern int max_delete;
82 extern int force_delete;
83 extern int one_file_system;
84 extern struct stats stats;
85 extern dev_t filesystem_dev;
86 extern char *backup_dir;
87 extern char *backup_suffix;
88 extern int backup_suffix_len;
89 extern struct file_list *the_file_list;
90 extern struct filter_list_struct server_filter_list;
92 static int deletion_count = 0; /* used to implement --max-delete */
95 static int is_backup_file(char *fn)
97 int k = strlen(fn) - backup_suffix_len;
98 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
102 /* Delete a file or directory. If DEL_FORCE_RECURSE is set in the flags, or if
103 * force_delete is set, this will delete recursively as long as DEL_NO_RECURSE
104 * is not set in the flags. */
105 static int delete_item(char *fname, int mode, int flags)
107 struct file_list *dirlist;
108 char buf[MAXPATHLEN];
109 int j, dlen, zap_dir, ok;
112 if (!S_ISDIR(mode)) {
113 if (max_delete && ++deletion_count > max_delete)
115 if (make_backups && (backup_dir || !is_backup_file(fname)))
116 ok = make_backup(fname);
118 ok = robust_unlink(fname) == 0;
120 if (!(flags & DEL_TERSE))
121 log_delete(fname, mode);
124 if (errno == ENOENT) {
128 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
133 zap_dir = (flags & DEL_FORCE_RECURSE || (force_delete && recurse))
134 && !(flags & DEL_NO_RECURSE);
135 if ((max_delete && ++deletion_count > max_delete)
136 || (dry_run && zap_dir)) {
139 } else if (make_backups && !backup_dir && !is_backup_file(fname)
140 && !(flags & DEL_FORCE_RECURSE))
141 ok = make_backup(fname);
143 ok = do_rmdir(fname) == 0;
145 if (!(flags & DEL_TERSE))
146 log_delete(fname, mode);
149 if (errno == ENOENT) {
154 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
158 flags |= DEL_FORCE_RECURSE; /* mark subdir dels as not "in the way" */
161 dlen = strlcpy(buf, fname, MAXPATHLEN);
162 save_filters = push_local_filters(buf, dlen);
164 dirlist = get_dirlist(buf, dlen, 0);
165 for (j = dirlist->count; j--; ) {
166 struct file_struct *fp = dirlist->files[j];
168 if (fp->flags & FLAG_MOUNT_POINT)
172 delete_item(buf, fp->mode, flags & ~DEL_TERSE);
176 pop_local_filters(save_filters);
178 if (max_delete && ++deletion_count > max_delete)
181 if (do_rmdir(fname) == 0) {
182 if (!(flags & DEL_TERSE))
183 log_delete(fname, mode);
184 } else if (errno != ENOTEMPTY && errno != EEXIST && errno != ENOENT) {
185 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
194 /* This function is used to implement per-directory deletion, and is used by
195 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
196 * MAXPATHLEN buffer with the name of the directory in it (the functions we
197 * call will append names onto the end, but the old dir value will be restored
199 static void delete_in_dir(struct file_list *flist, char *fbuf,
200 struct file_struct *file)
202 static int min_depth = MAXPATHLEN, cur_depth = -1;
203 static void *filt_array[MAXPATHLEN/2+1];
204 static int already_warned = 0;
205 struct file_list *dirlist;
206 char delbuf[MAXPATHLEN];
211 while (cur_depth >= min_depth)
212 pop_local_filters(filt_array[cur_depth--]);
213 min_depth = MAXPATHLEN;
219 rprintf(FINFO, "delete_in_dir(%s)\n", safe_fname(fbuf));
222 maybe_send_keepalive();
224 if (file->dir.depth >= MAXPATHLEN/2+1)
225 return; /* Impossible... */
227 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
231 "IO error encountered -- skipping file deletion\n");
236 while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
237 pop_local_filters(filt_array[cur_depth--]);
238 cur_depth = file->dir.depth;
239 if (min_depth > cur_depth)
240 min_depth = cur_depth;
242 filt_array[cur_depth] = push_local_filters(fbuf, dlen);
244 if (link_stat(fbuf, &st, keep_dirlinks) < 0)
247 if (one_file_system) {
248 if (file->flags & FLAG_TOP_DIR)
249 filesystem_dev = st.st_dev;
250 else if (filesystem_dev != st.st_dev)
254 dirlist = get_dirlist(fbuf, dlen, 0);
256 /* If an item in dirlist is not found in flist, delete it
257 * from the filesystem. */
258 for (i = dirlist->count; i--; ) {
259 struct file_struct *fp = dirlist->files[i];
260 if (!fp->basename || fp->flags & FLAG_MOUNT_POINT)
262 if (flist_find(flist, fp) < 0) {
264 f_name_to(fp, delbuf);
265 delete_item(delbuf, mode, DEL_FORCE_RECURSE);
272 /* This deletes any files on the receiving side that are not present on the
273 * sending side. This is used by --delete-before and --delete-after. */
274 static void do_delete_pass(struct file_list *flist)
276 char fbuf[MAXPATHLEN];
279 if (dry_run > 1 /* destination doesn't exist yet */
283 for (j = 0; j < flist->count; j++) {
284 struct file_struct *file = flist->files[j];
286 if (!(file->flags & FLAG_DEL_HERE))
289 f_name_to(file, fbuf);
290 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
291 rprintf(FINFO, "deleting in %s\n", safe_fname(fbuf));
293 delete_in_dir(flist, fbuf, file);
295 if (do_progress && !am_server)
296 rprintf(FINFO, " \r");
299 static int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
302 && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
305 if (am_root && preserve_uid && st->st_uid != file->uid)
308 if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
315 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
316 int32 iflags, uchar fnamecmp_type, char *xname)
319 if (S_ISREG(file->mode) && file->length != st->st_size)
320 iflags |= ITEM_REPORT_SIZE;
321 if (!(iflags & ITEM_NO_DEST_AND_NO_UPDATE)) {
322 int keep_time = !preserve_times ? 0
323 : S_ISDIR(file->mode) ? !omit_dir_times
324 : !S_ISLNK(file->mode);
326 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
327 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
328 || (keep_time && cmp_modtime(file->modtime, st->st_mtime) != 0))
329 iflags |= ITEM_REPORT_TIME;
331 && (file->mode & CHMOD_BITS) != (st->st_mode & CHMOD_BITS))
332 iflags |= ITEM_REPORT_PERMS;
333 if (preserve_uid && am_root && file->uid != st->st_uid)
334 iflags |= ITEM_REPORT_OWNER;
335 if (preserve_gid && file->gid != GID_NONE
336 && st->st_gid != file->gid)
337 iflags |= ITEM_REPORT_GROUP;
340 iflags |= ITEM_IS_NEW;
343 if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
344 || (xname && *xname)) && !read_batch) {
345 if (protocol_version >= 29) {
347 write_int(sock_f_out, ndx);
348 write_shortint(sock_f_out, iflags);
349 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
350 write_byte(sock_f_out, fnamecmp_type);
351 if (iflags & ITEM_XNAME_FOLLOWS)
352 write_vstring(sock_f_out, xname, strlen(xname));
354 log_item(file, &stats, iflags, xname);
359 /* Perform our quick-check heuristic for determining if a file is unchanged. */
360 static int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
362 if (st->st_size != file->length)
365 /* if always checksum is set then we use the checksum instead
366 of the file time to determine whether to sync */
367 if (always_checksum && S_ISREG(st->st_mode)) {
368 char sum[MD4_SUM_LENGTH];
369 file_checksum(fn, sum, st->st_size);
370 return memcmp(sum, file->u.sum, protocol_version < 21 ? 2
371 : MD4_SUM_LENGTH) == 0;
380 return cmp_modtime(st->st_mtime, file->modtime) == 0;
385 * set (initialize) the size entries in the per-file sum_struct
386 * calculating dynamic block and checksum sizes.
388 * This is only called from generate_and_send_sums() but is a separate
389 * function to encapsulate the logic.
391 * The block size is a rounded square root of file length.
393 * The checksum size is determined according to:
394 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
395 * provided by Donovan Baarda which gives a probability of rsync
396 * algorithm corrupting data and falling back using the whole md4
399 * This might be made one of several selectable heuristics.
401 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
407 blength = block_size;
408 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
409 blength = BLOCK_SIZE;
414 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
415 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
416 blength = MAX_BLOCK_SIZE;
421 if (len < (int64)blength * blength)
424 } while (c >= 8); /* round to multiple of 8 */
425 blength = MAX(blength, BLOCK_SIZE);
429 if (protocol_version < 27) {
430 s2length = csum_length;
431 } else if (csum_length == SUM_LENGTH) {
432 s2length = SUM_LENGTH;
436 int b = BLOCKSUM_BIAS;
437 for (l = len; l >>= 1; b += 2) {}
438 for (c = blength; c >>= 1 && b; b--) {}
439 /* add a bit, subtract rollsum, round up. */
440 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
441 s2length = MAX(s2length, csum_length);
442 s2length = MIN(s2length, SUM_LENGTH);
446 sum->blength = blength;
447 sum->s2length = s2length;
448 sum->count = (len + (blength - 1)) / blength;
449 sum->remainder = (len % blength);
451 if (sum->count && verbose > 2) {
453 "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
454 (double)sum->count, (long)sum->remainder, (long)sum->blength,
455 sum->s2length, (double)sum->flength);
461 * Generate and send a stream of signatures/checksums that describe a buffer
463 * Generate approximately one checksum every block_len bytes.
465 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
468 struct map_struct *mapbuf;
469 struct sum_struct sum;
472 sum_sizes_sqroot(&sum, len);
475 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
479 write_sum_head(f_out, &sum);
481 for (i = 0; i < sum.count; i++) {
482 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
483 char *map = map_ptr(mapbuf, offset, n1);
484 uint32 sum1 = get_checksum1(map, n1);
485 char sum2[SUM_LENGTH];
488 full_write(f_copy, map, n1);
490 get_checksum2(map, n1, sum2);
494 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
495 (double)i, (double)offset, (long)n1,
496 (unsigned long)sum1);
498 write_int(f_out, sum1);
499 write_buf(f_out, sum2, sum.s2length);
509 /* Try to find a filename in the same dir as "fname" with a similar name. */
510 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
512 int fname_len, fname_suf_len;
513 const char *fname_suf, *fname = file->basename;
514 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
515 int j, lowest_j = -1;
517 fname_len = strlen(fname);
518 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
520 for (j = 0; j < dirlist->count; j++) {
521 struct file_struct *fp = dirlist->files[j];
522 const char *suf, *name;
526 if (!S_ISREG(fp->mode) || !fp->length
527 || fp->flags & FLAG_NO_FUZZY)
532 if (fp->length == file->length
533 && cmp_modtime(fp->modtime, file->modtime) == 0) {
536 "fuzzy size/modtime match for %s\n",
543 suf = find_filename_suffix(name, len, &suf_len);
545 dist = fuzzy_distance(name, len, fname, fname_len);
546 /* Add some extra weight to how well the suffixes match. */
547 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
550 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
551 name, (int)(dist>>16), (int)(dist&0xFFFF));
553 if (dist <= lowest_dist) {
562 void check_for_finished_hlinks(int itemizing, enum logcode code)
564 struct file_struct *file;
567 while ((ndx = get_hlink_num()) != -1) {
568 if (ndx < 0 || ndx >= the_file_list->count)
571 file = the_file_list->files[ndx];
572 if (!file->link_u.links)
575 hard_link_cluster(file, ndx, itemizing, code);
579 static int phase = 0;
581 /* Acts on the_file_list->file's ndx'th item, whose name is fname. If a dir,
582 * make sure it exists, and has the right permissions/timestamp info. For
583 * all other non-regular files (symlinks, etc.) we create them here. For
584 * regular files that have changed, we try to find a basis file and then
585 * start sending checksums.
587 * Note that f_out is set to -1 when doing final directory-permission and
588 * modification-time repair. */
589 static void recv_generator(char *fname, struct file_struct *file, int ndx,
590 int itemizing, int maybe_PERMS_REPORT,
591 enum logcode code, int f_out)
593 static int missing_below = -1, excluded_below = -1;
594 static char *fuzzy_dirname = "";
595 static struct file_list *fuzzy_dirlist = NULL;
596 struct file_struct *fuzzy_file = NULL;
597 int fd = -1, f_copy = -1;
598 STRUCT_STAT st, real_st, partial_st;
599 struct file_struct *back_file = NULL;
600 int statret, real_ret, stat_errno;
601 char *fnamecmp, *partialptr, *backupptr = NULL;
602 char fnamecmpbuf[MAXPATHLEN];
610 flist_free(fuzzy_dirlist);
611 fuzzy_dirlist = NULL;
614 if (missing_below >= 0) {
622 rprintf(FINFO, "recv_generator(%s,%d)\n",
623 safe_fname(fname), ndx);
626 if (server_filter_list.head) {
627 if (excluded_below >= 0) {
628 if (file->dir.depth > excluded_below)
632 if (check_filter(&server_filter_list, fname,
633 S_ISDIR(file->mode)) < 0) {
634 if (S_ISDIR(file->mode))
635 excluded_below = file->dir.depth;
639 "skipping server-excluded file \"%s\"\n",
646 if (missing_below >= 0 && file->dir.depth <= missing_below) {
654 if (fuzzy_basis && S_ISREG(file->mode)) {
655 char *dn = file->dirname ? file->dirname : ".";
656 if (fuzzy_dirname != dn
657 && strcmp(fuzzy_dirname, dn) != 0) {
659 flist_free(fuzzy_dirlist);
660 fuzzy_dirlist = get_dirlist(dn, -1, 1);
665 statret = link_stat(fname, &st,
666 keep_dirlinks && S_ISDIR(file->mode));
670 if (only_existing && statret == -1 && stat_errno == ENOENT) {
671 /* we only want to update existing files */
673 rprintf(FINFO, "not creating new %s \"%s\"\n",
674 S_ISDIR(file->mode) ? "directory" : "file",
680 if (statret == 0 && !preserve_perms
681 && S_ISDIR(st.st_mode) == S_ISDIR(file->mode)) {
682 /* if the file exists already and we aren't perserving
683 * permissions then act as though the remote end sent
684 * us the file permissions we already have */
685 file->mode = (file->mode & ~CHMOD_BITS)
686 | (st.st_mode & CHMOD_BITS);
689 if (S_ISDIR(file->mode)) {
690 /* The file to be received is a directory, so we need
691 * to prepare appropriately. If there is already a
692 * file of that name and it is *not* a directory, then
693 * we need to delete it. If it doesn't exist, then
694 * (perhaps recursively) create it. */
695 if (statret == 0 && !S_ISDIR(st.st_mode)) {
696 if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
700 if (dry_run && statret != 0 && missing_below < 0) {
701 missing_below = file->dir.depth;
704 if (itemizing && f_out != -1) {
705 itemize(file, ndx, statret, &st,
706 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
708 if (statret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
709 if (!relative_paths || errno != ENOENT
710 || create_directory_path(fname, orig_umask) < 0
711 || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
712 rsyserr(FERROR, errno,
713 "recv_generator: mkdir %s failed",
717 if (set_perms(fname, file, statret ? NULL : &st, 0)
718 && verbose && code && f_out != -1)
719 rprintf(code, "%s/\n", safe_fname(fname));
720 if (delete_during && f_out != -1 && !phase && dry_run < 2
721 && (file->flags & FLAG_DEL_HERE))
722 delete_in_dir(the_file_list, fname, file);
726 if (preserve_links && S_ISLNK(file->mode)) {
728 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
730 if (the_file_list->count == 1)
731 fname = f_name(file);
733 "ignoring unsafe symlink %s -> \"%s\"\n",
735 safe_fname(file->u.link));
740 char lnk[MAXPATHLEN];
743 if (!S_ISDIR(st.st_mode)
744 && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
746 /* A link already pointing to the
747 * right place -- no further action
749 if (strcmp(lnk, file->u.link) == 0) {
751 itemize(file, ndx, 0, &st, 0,
754 set_perms(fname, file, &st,
759 /* Not the right symlink (or not a symlink), so
761 if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
763 if (!S_ISLNK(st.st_mode))
766 if (do_symlink(file->u.link,fname) != 0) {
767 rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
768 full_fname(fname), safe_fname(file->u.link));
770 set_perms(fname,file,NULL,0);
772 itemize(file, ndx, statret, &st,
773 ITEM_LOCAL_CHANGE, 0, NULL);
775 if (code && verbose) {
776 rprintf(code, "%s -> %s\n", safe_fname(fname),
777 safe_fname(file->u.link));
779 if (remove_sent_files && !dry_run) {
781 SIVAL(numbuf, 0, ndx);
782 send_msg(MSG_SUCCESS, numbuf, 4);
789 if (am_root && preserve_devices && IS_DEVICE(file->mode)) {
791 st.st_mode != file->mode ||
792 st.st_rdev != file->u.rdev) {
793 if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
795 if (!IS_DEVICE(st.st_mode))
798 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
800 (int)file->mode, (int)file->u.rdev);
802 if (do_mknod(fname,file->mode,file->u.rdev) < 0) {
803 rsyserr(FERROR, errno, "mknod %s failed",
806 set_perms(fname,file,NULL,0);
808 itemize(file, ndx, statret, &st,
809 ITEM_LOCAL_CHANGE, 0, NULL);
811 if (code && verbose) {
812 rprintf(code, "%s\n",
818 itemize(file, ndx, statret, &st, 0, 0, NULL);
819 set_perms(fname, file, &st, maybe_PERMS_REPORT);
824 if (preserve_hard_links
825 && hard_link_check(file, ndx, fname, statret, &st,
826 itemizing, code, HL_CHECK_MASTER))
829 if (!S_ISREG(file->mode)) {
830 if (the_file_list->count == 1)
831 fname = f_name(file);
832 rprintf(FINFO, "skipping non-regular file \"%s\"\n",
837 if (max_size && file->length > max_size) {
839 if (the_file_list->count == 1)
840 fname = f_name(file);
841 rprintf(FINFO, "%s is over max-size\n",
847 if (opt_ignore_existing && statret == 0) {
849 rprintf(FINFO, "%s exists\n", safe_fname(fname));
853 if (update_only && statret == 0
854 && cmp_modtime(st.st_mtime, file->modtime) > 0) {
856 rprintf(FINFO, "%s is newer\n", safe_fname(fname));
861 fnamecmp_type = FNAMECMP_FNAME;
863 if (statret == 0 && !S_ISREG(st.st_mode)) {
864 if (delete_item(fname, st.st_mode, DEL_TERSE) != 0)
870 if (statret != 0 && basis_dir[0] != NULL) {
875 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
876 basis_dir[i], fname);
877 if (link_stat(fnamecmpbuf, &st, 0) < 0
878 || !S_ISREG(st.st_mode))
880 switch (match_level) {
886 if (!unchanged_file(fnamecmpbuf, file, &st))
894 if (!unchanged_attrs(file, &st))
901 } while (basis_dir[++i] != NULL);
904 if (i != best_match) {
906 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
907 basis_dir[i], fname);
908 if (link_stat(fnamecmpbuf, &st, 0) < 0) {
915 if (link_dest && match_level == 3) {
916 if (hard_link_one(file, ndx, fname, -1, &st,
918 itemizing && verbose > 1,
920 if (preserve_hard_links
921 && file->link_u.links) {
922 hard_link_cluster(file, ndx,
931 if (match_level == 2) {
932 /* Copy the file locally. */
933 if (copy_file(fnamecmpbuf, fname, file->mode) < 0) {
935 rsyserr(FINFO, errno,
936 "copy_file %s => %s",
937 full_fname(fnamecmpbuf),
944 itemize(file, ndx, 0, &st,
945 ITEM_LOCAL_CHANGE, 0,
947 } else if (verbose && code) {
948 rprintf(code, "%s\n",
951 set_perms(fname, file, NULL,
953 if (preserve_hard_links
954 && file->link_u.links) {
955 hard_link_cluster(file, ndx,
961 } else if (compare_dest || match_level == 1) {
962 fnamecmp = fnamecmpbuf;
971 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
972 && link_stat(partialptr, &partial_st, 0) == 0
973 && S_ISREG(partial_st.st_mode)) {
975 goto prepare_to_open;
979 if (statret != 0 && fuzzy_basis && dry_run <= 1) {
980 int j = find_fuzzy(file, fuzzy_dirlist);
982 fuzzy_file = fuzzy_dirlist->files[j];
983 f_name_to(fuzzy_file, fnamecmpbuf);
985 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
986 safe_fname(fname), safe_fname(fnamecmpbuf));
988 st.st_size = fuzzy_file->length;
990 fnamecmp = fnamecmpbuf;
991 fnamecmp_type = FNAMECMP_FUZZY;
996 if (preserve_hard_links
997 && hard_link_check(file, ndx, fname, statret, &st,
998 itemizing, code, HL_SKIP))
1000 if (stat_errno == ENOENT)
1003 rsyserr(FERROR, stat_errno,
1004 "recv_generator: failed to stat %s",
1010 if (!compare_dest && fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1012 else if (fnamecmp_type == FNAMECMP_FUZZY)
1014 else if (unchanged_file(fnamecmp, file, &st)) {
1015 if (fnamecmp_type == FNAMECMP_FNAME) {
1017 itemize(file, ndx, real_ret, &real_st,
1020 set_perms(fname, file, &st, maybe_PERMS_REPORT);
1021 if (preserve_hard_links && file->link_u.links)
1022 hard_link_cluster(file, ndx, itemizing, code);
1025 /* Only --compare-dest gets here. */
1026 itemize(file, ndx, real_ret, &real_st,
1027 ITEM_NO_DEST_AND_NO_UPDATE, 0, NULL);
1034 fnamecmp = partialptr;
1035 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1039 if (!do_xfers || read_batch || whole_file)
1043 int j = flist_find(fuzzy_dirlist, file);
1044 if (j >= 0) /* don't use changing file as future fuzzy basis */
1045 fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1049 fd = do_open(fnamecmp, O_RDONLY, 0);
1052 rsyserr(FERROR, errno, "failed to open %s, continuing",
1053 full_fname(fnamecmp));
1055 /* pretend the file didn't exist */
1056 if (preserve_hard_links
1057 && hard_link_check(file, ndx, fname, statret, &st,
1058 itemizing, code, HL_SKIP))
1060 statret = real_ret = -1;
1064 if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1065 if (!(backupptr = get_backup_name(fname))) {
1069 if (!(back_file = make_file(fname, NULL, NO_FILTERS))) {
1071 goto pretend_missing;
1073 if (robust_unlink(backupptr) && errno != ENOENT) {
1074 rsyserr(FERROR, errno, "unlink %s",
1075 full_fname(backupptr));
1080 if ((f_copy = do_open(backupptr,
1081 O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1082 rsyserr(FERROR, errno, "open %s",
1083 full_fname(backupptr));
1088 fnamecmp_type = FNAMECMP_BACKUP;
1092 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1093 safe_fname(fnamecmp), (double)st.st_size);
1097 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1100 write_int(f_out, ndx);
1102 int iflags = ITEM_TRANSFER;
1103 if (always_checksum)
1104 iflags |= ITEM_REPORT_CHECKSUM;
1105 if (fnamecmp_type != FNAMECMP_FNAME)
1106 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1107 if (fnamecmp_type == FNAMECMP_FUZZY)
1108 iflags |= ITEM_XNAME_FOLLOWS;
1109 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1110 fuzzy_file ? fuzzy_file->basename : NULL);
1114 if (preserve_hard_links && file->link_u.links)
1115 hard_link_cluster(file, ndx, itemizing, code);
1121 if (statret != 0 || whole_file) {
1122 write_sum_head(f_out, NULL);
1126 generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1130 set_perms(backupptr, back_file, NULL, 0);
1132 rprintf(FINFO, "backed up %s to %s\n",
1133 safe_fname(fname), safe_fname(backupptr));
1142 void generate_files(int f_out, struct file_list *flist, char *local_name)
1145 char fbuf[MAXPATHLEN];
1146 int itemizing, maybe_PERMS_REPORT;
1148 int lull_mod = allowed_lull * 5;
1149 int need_retouch_dir_times = preserve_times && !omit_dir_times;
1150 int need_retouch_dir_perms = 0;
1151 int save_only_existing = only_existing;
1152 int save_opt_ignore_existing = opt_ignore_existing;
1153 int save_do_progress = do_progress;
1154 int save_make_backups = make_backups;
1156 if (protocol_version >= 29) {
1158 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1159 code = daemon_log_format_has_i ? 0 : FLOG;
1160 } else if (am_daemon) {
1161 itemizing = daemon_log_format_has_i && do_xfers;
1162 maybe_PERMS_REPORT = PERMS_REPORT;
1163 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1164 } else if (!am_server) {
1165 itemizing = log_format_has_i;
1166 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1167 code = itemizing ? 0 : FINFO;
1170 maybe_PERMS_REPORT = PERMS_REPORT;
1175 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1176 (long)getpid(), flist->count);
1179 if (delete_before && !local_name && flist->count > 0)
1180 do_delete_pass(flist);
1186 rprintf(FINFO, "delta-transmission %s\n",
1188 ? "disabled for local transfer or --whole-file"
1192 /* Since we often fill up the outgoing socket and then just sit around
1193 * waiting for the other 2 processes to do their thing, we don't want
1194 * to exit on a timeout. If the data stops flowing, the receiver will
1195 * notice that and let us know via the redo pipe (or its closing). */
1198 for (i = 0; i < flist->count; i++) {
1199 struct file_struct *file = flist->files[i];
1201 if (!file->basename)
1204 recv_generator(local_name ? local_name : f_name_to(file, fbuf),
1205 file, i, itemizing, maybe_PERMS_REPORT, code,
1208 /* We need to ensure that any dirs we create have writeable
1209 * permissions during the time we are putting files within
1210 * them. This is then fixed after the transfer is done. */
1212 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1214 int mode = file->mode | S_IWUSR; /* user write */
1215 char *fname = local_name ? local_name : fbuf;
1216 if (do_chmod(fname, mode) < 0) {
1217 rsyserr(FERROR, errno,
1218 "failed to modify permissions on %s",
1221 need_retouch_dir_perms = 1;
1225 if (preserve_hard_links)
1226 check_for_finished_hlinks(itemizing, code);
1228 if (allowed_lull && !(i % lull_mod))
1229 maybe_send_keepalive();
1230 else if (!(i % 200))
1231 maybe_flush_socket();
1233 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1235 delete_in_dir(NULL, NULL, NULL);
1238 csum_length = SUM_LENGTH;
1239 only_existing = max_size = opt_ignore_existing = 0;
1240 update_only = always_checksum = size_only = 0;
1242 make_backups = 0; /* avoid a duplicate backup for inplace processing */
1245 rprintf(FINFO,"generate_files phase=%d\n",phase);
1247 write_int(f_out, -1);
1249 /* files can cycle through the system more than once
1250 * to catch initial checksum errors */
1251 while ((i = get_redo_num(itemizing, code)) != -1) {
1252 struct file_struct *file = flist->files[i];
1253 recv_generator(local_name ? local_name : f_name_to(file, fbuf),
1254 file, i, itemizing, maybe_PERMS_REPORT, code,
1259 only_existing = save_only_existing;
1260 opt_ignore_existing = save_opt_ignore_existing;
1261 make_backups = save_make_backups;
1264 rprintf(FINFO,"generate_files phase=%d\n",phase);
1266 write_int(f_out, -1);
1267 /* Reduce round-trip lag-time for a useless delay-updates phase. */
1268 if (protocol_version >= 29 && !delay_updates)
1269 write_int(f_out, -1);
1271 /* Read MSG_DONE for the redo phase (and any prior messages). */
1272 get_redo_num(itemizing, code);
1274 if (protocol_version >= 29) {
1277 rprintf(FINFO, "generate_files phase=%d\n", phase);
1279 write_int(f_out, -1);
1280 /* Read MSG_DONE for delay-updates phase & prior messages. */
1281 get_redo_num(itemizing, code);
1284 do_progress = save_do_progress;
1285 if (delete_after && !local_name && flist->count > 0)
1286 do_delete_pass(flist);
1288 if ((need_retouch_dir_perms || need_retouch_dir_times)
1289 && !list_only && !local_name && !dry_run) {
1291 /* Now we need to fix any directory permissions that were
1292 * modified during the transfer and/or re-set any tweaked
1293 * modified-time values. */
1294 for (i = 0; i < flist->count; i++) {
1295 struct file_struct *file = flist->files[i];
1296 if (!file->basename || !S_ISDIR(file->mode))
1298 if (!need_retouch_dir_times && file->mode & S_IWUSR)
1300 recv_generator(f_name(file), file, i, itemizing,
1301 maybe_PERMS_REPORT, code, -1);
1302 if (allowed_lull && !(++j % lull_mod))
1303 maybe_send_keepalive();
1304 else if (!(j % 200))
1305 maybe_flush_socket();
1308 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1310 if (max_delete > 0 && deletion_count > max_delete) {
1312 "Deletions stopped due to --max-delete limit (%d skipped)\n",
1313 deletion_count - max_delete);
1314 io_error |= IOERR_DEL_LIMIT;
1318 rprintf(FINFO,"generate_files finished\n");