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;
34 extern int do_progress;
36 extern int relative_paths;
37 extern int keep_dirlinks;
38 extern int preserve_links;
39 extern int preserve_devices;
40 extern int preserve_hard_links;
41 extern int preserve_perms;
42 extern int preserve_uid;
43 extern int preserve_gid;
44 extern int preserve_times;
45 extern int omit_dir_times;
46 extern int delete_before;
47 extern int delete_during;
48 extern int delete_after;
50 extern int ignore_errors;
51 extern int remove_sent_files;
52 extern int delay_updates;
53 extern int update_only;
54 extern int opt_ignore_existing;
56 extern int make_backups;
57 extern int csum_length;
58 extern int ignore_times;
60 extern OFF_T max_size;
61 extern int io_timeout;
63 extern int sock_f_out;
64 extern int ignore_timeout;
65 extern int protocol_version;
66 extern int fuzzy_basis;
67 extern int always_checksum;
68 extern char *partial_dir;
69 extern char *basis_dir[];
70 extern int compare_dest;
73 extern int whole_file;
74 extern int local_server;
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;
94 static int deletion_count = 0; /* used to implement --max-delete */
97 static int is_backup_file(char *fn)
99 int k = strlen(fn) - backup_suffix_len;
100 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
104 /* Delete a file or directory. If DEL_FORCE_RECURSE is set in the flags, or if
105 * force_delete is set, this will delete recursively as long as DEL_NO_RECURSE
106 * is not set in the flags. */
107 static int delete_item(char *fname, int mode, int flags)
109 struct file_list *dirlist;
110 char buf[MAXPATHLEN];
111 int j, dlen, zap_dir, ok;
114 if (!S_ISDIR(mode)) {
115 if (max_delete && ++deletion_count > max_delete)
117 if (make_backups && (backup_dir || !is_backup_file(fname)))
118 ok = make_backup(fname);
120 ok = robust_unlink(fname) == 0;
122 if (!(flags & DEL_TERSE))
123 log_delete(fname, mode);
126 if (errno == ENOENT) {
130 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
135 zap_dir = (flags & DEL_FORCE_RECURSE || (force_delete && recurse))
136 && !(flags & DEL_NO_RECURSE);
137 if ((max_delete && ++deletion_count > max_delete)
138 || (dry_run && zap_dir)) {
141 } else if (make_backups && !backup_dir && !is_backup_file(fname)
142 && !(flags & DEL_FORCE_RECURSE))
143 ok = make_backup(fname);
145 ok = do_rmdir(fname) == 0;
147 if (!(flags & DEL_TERSE))
148 log_delete(fname, mode);
151 if (errno == ENOENT) {
155 if (!zap_dir || (errno != ENOTEMPTY && errno != EEXIST)) {
156 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
160 flags |= DEL_FORCE_RECURSE; /* mark subdir dels as not "in the way" */
163 dlen = strlcpy(buf, fname, MAXPATHLEN);
164 save_filters = push_local_filters(buf, dlen);
166 dirlist = get_dirlist(buf, dlen, 0);
167 for (j = dirlist->count; j--; ) {
168 struct file_struct *fp = dirlist->files[j];
170 if (fp->flags & FLAG_MOUNT_POINT)
174 if (delete_item(buf, fp->mode, flags & ~DEL_TERSE) != 0) {
181 pop_local_filters(save_filters);
183 if (max_delete && ++deletion_count > max_delete)
186 if (do_rmdir(fname) == 0) {
187 if (!(flags & DEL_TERSE))
188 log_delete(fname, mode);
189 } else if (errno != ENOTEMPTY && errno != ENOENT) {
190 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
199 /* This function is used to implement per-directory deletion, and is used by
200 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
201 * MAXPATHLEN buffer with the name of the directory in it (the functions we
202 * call will append names onto the end, but the old dir value will be restored
204 static void delete_in_dir(struct file_list *flist, char *fbuf,
205 struct file_struct *file)
207 static int min_depth = MAXPATHLEN, cur_depth = -1;
208 static void *filt_array[MAXPATHLEN/2+1];
209 static int already_warned = 0;
210 struct file_list *dirlist;
211 char delbuf[MAXPATHLEN];
216 while (cur_depth >= min_depth)
217 pop_local_filters(filt_array[cur_depth--]);
218 min_depth = MAXPATHLEN;
224 rprintf(FINFO, "delete_in_dir(%s)\n", safe_fname(fbuf));
227 maybe_send_keepalive();
229 if (file->dir.depth >= MAXPATHLEN/2+1)
230 return; /* Impossible... */
232 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
236 "IO error encountered -- skipping file deletion\n");
241 while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
242 pop_local_filters(filt_array[cur_depth--]);
243 cur_depth = file->dir.depth;
244 if (min_depth > cur_depth)
245 min_depth = cur_depth;
247 filt_array[cur_depth] = push_local_filters(fbuf, dlen);
249 if (link_stat(fbuf, &st, keep_dirlinks) < 0)
252 if (one_file_system && file->flags & FLAG_TOP_DIR)
253 filesystem_dev = st.st_dev;
255 dirlist = get_dirlist(fbuf, dlen, 0);
257 /* If an item in dirlist is not found in flist, delete it
258 * from the filesystem. */
259 for (i = dirlist->count; i--; ) {
260 if (!dirlist->files[i]->basename)
262 if (flist_find(flist, dirlist->files[i]) < 0) {
263 int mode = dirlist->files[i]->mode;
264 f_name_to(dirlist->files[i], delbuf);
265 if (delete_item(delbuf, mode, DEL_FORCE_RECURSE) < 0)
273 /* This deletes any files on the receiving side that are not present on the
274 * sending side. This is used by --delete-before and --delete-after. */
275 static void do_delete_pass(struct file_list *flist)
277 char fbuf[MAXPATHLEN];
280 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);
297 static int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
300 && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
303 if (am_root && preserve_uid && st->st_uid != file->uid)
306 if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
313 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
314 int32 iflags, uchar fnamecmp_type, char *xname)
317 if (S_ISREG(file->mode) && file->length != st->st_size)
318 iflags |= ITEM_REPORT_SIZE;
319 if (!(iflags & ITEM_NO_DEST_AND_NO_UPDATE)) {
320 int keep_time = !preserve_times ? 0
321 : S_ISDIR(file->mode) ? !omit_dir_times
322 : !S_ISLNK(file->mode);
324 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time)
325 || (keep_time && file->modtime != st->st_mtime))
326 iflags |= ITEM_REPORT_TIME;
327 if (preserve_perms && file->mode != st->st_mode)
328 iflags |= ITEM_REPORT_PERMS;
329 if (preserve_uid && am_root && file->uid != st->st_uid)
330 iflags |= ITEM_REPORT_OWNER;
331 if (preserve_gid && file->gid != GID_NONE
332 && st->st_gid != file->gid)
333 iflags |= ITEM_REPORT_GROUP;
336 iflags |= ITEM_IS_NEW;
339 if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
340 || (xname && *xname)) && !read_batch) {
341 if (protocol_version >= 29) {
343 write_int(sock_f_out, ndx);
344 write_shortint(sock_f_out, iflags);
345 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
346 write_byte(sock_f_out, fnamecmp_type);
347 if (iflags & ITEM_XNAME_FOLLOWS)
348 write_vstring(sock_f_out, xname, strlen(xname));
350 log_item(file, &stats, iflags, xname);
355 /* Perform our quick-check heuristic for determining if a file is unchanged. */
356 static int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
358 if (st->st_size != file->length)
361 /* if always checksum is set then we use the checksum instead
362 of the file time to determine whether to sync */
363 if (always_checksum && S_ISREG(st->st_mode)) {
364 char sum[MD4_SUM_LENGTH];
365 file_checksum(fn, sum, st->st_size);
366 return memcmp(sum, file->u.sum, protocol_version < 21 ? 2
367 : MD4_SUM_LENGTH) == 0;
376 return cmp_modtime(st->st_mtime, file->modtime) == 0;
381 * set (initialize) the size entries in the per-file sum_struct
382 * calculating dynamic block and checksum sizes.
384 * This is only called from generate_and_send_sums() but is a separate
385 * function to encapsulate the logic.
387 * The block size is a rounded square root of file length.
389 * The checksum size is determined according to:
390 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
391 * provided by Donovan Baarda which gives a probability of rsync
392 * algorithm corrupting data and falling back using the whole md4
395 * This might be made one of several selectable heuristics.
397 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
403 blength = block_size;
404 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
405 blength = BLOCK_SIZE;
410 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
411 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
412 blength = MAX_BLOCK_SIZE;
417 if (len < (int64)blength * blength)
420 } while (c >= 8); /* round to multiple of 8 */
421 blength = MAX(blength, BLOCK_SIZE);
425 if (protocol_version < 27) {
426 s2length = csum_length;
427 } else if (csum_length == SUM_LENGTH) {
428 s2length = SUM_LENGTH;
432 int b = BLOCKSUM_BIAS;
433 for (l = len; l >>= 1; b += 2) {}
434 for (c = blength; c >>= 1 && b; b--) {}
435 /* add a bit, subtract rollsum, round up. */
436 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
437 s2length = MAX(s2length, csum_length);
438 s2length = MIN(s2length, SUM_LENGTH);
442 sum->blength = blength;
443 sum->s2length = s2length;
444 sum->count = (len + (blength - 1)) / blength;
445 sum->remainder = (len % blength);
447 if (sum->count && verbose > 2) {
449 "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
450 (double)sum->count, (long)sum->remainder, (long)sum->blength,
451 sum->s2length, (double)sum->flength);
457 * Generate and send a stream of signatures/checksums that describe a buffer
459 * Generate approximately one checksum every block_len bytes.
461 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
464 struct map_struct *mapbuf;
465 struct sum_struct sum;
468 sum_sizes_sqroot(&sum, len);
471 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
475 write_sum_head(f_out, &sum);
477 for (i = 0; i < sum.count; i++) {
478 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
479 char *map = map_ptr(mapbuf, offset, n1);
480 uint32 sum1 = get_checksum1(map, n1);
481 char sum2[SUM_LENGTH];
484 full_write(f_copy, map, n1);
486 get_checksum2(map, n1, sum2);
490 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
491 (double)i, (double)offset, (long)n1,
492 (unsigned long)sum1);
494 write_int(f_out, sum1);
495 write_buf(f_out, sum2, sum.s2length);
505 /* Try to find a filename in the same dir as "fname" with a similar name. */
506 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
508 int fname_len, fname_suf_len;
509 const char *fname_suf, *fname = file->basename;
510 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
511 int j, lowest_j = -1;
513 fname_len = strlen(fname);
514 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
516 for (j = 0; j < dirlist->count; j++) {
517 struct file_struct *fp = dirlist->files[j];
518 const char *suf, *name;
522 if (!S_ISREG(fp->mode) || !fp->length
523 || fp->flags & FLAG_NO_FUZZY)
528 if (fp->length == file->length
529 && fp->modtime == file->modtime) {
532 "fuzzy size/modtime match for %s\n",
539 suf = find_filename_suffix(name, len, &suf_len);
541 dist = fuzzy_distance(name, len, fname, fname_len);
542 /* Add some extra weight to how well the suffixes match. */
543 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
546 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
547 name, (int)(dist>>16), (int)(dist&0xFFFF));
549 if (dist <= lowest_dist) {
558 void check_for_finished_hlinks(int itemizing, enum logcode code)
560 struct file_struct *file;
563 while ((ndx = get_hlink_num()) != -1) {
564 if (ndx < 0 || ndx >= the_file_list->count)
567 file = the_file_list->files[ndx];
568 if (!file->link_u.links)
571 hard_link_cluster(file, ndx, itemizing, code);
575 static int phase = 0;
577 /* Acts on the_file_list->file's ndx'th item, whose name is fname. If a dir,
578 * make sure it exists, and has the right permissions/timestamp info. For
579 * all other non-regular files (symlinks, etc.) we create them here. For
580 * regular files that have changed, we try to find a basis file and then
581 * start sending checksums.
583 * Note that f_out is set to -1 when doing final directory-permission and
584 * modification-time repair. */
585 static void recv_generator(char *fname, struct file_struct *file, int ndx,
586 int itemizing, int maybe_PERMS_REPORT,
587 enum logcode code, int f_out)
589 static int missing_below = -1, excluded_below = -1;
590 static char *fuzzy_dirname = "";
591 static struct file_list *fuzzy_dirlist = NULL;
592 struct file_struct *fuzzy_file = NULL;
593 int fd = -1, f_copy = -1;
594 STRUCT_STAT st, real_st, partial_st;
595 struct file_struct *back_file = NULL;
596 int statret, real_ret, stat_errno;
597 char *fnamecmp, *partialptr, *backupptr = NULL;
598 char fnamecmpbuf[MAXPATHLEN];
606 flist_free(fuzzy_dirlist);
607 fuzzy_dirlist = NULL;
610 if (missing_below >= 0) {
618 rprintf(FINFO, "recv_generator(%s,%d)\n",
619 safe_fname(fname), ndx);
622 if (server_filter_list.head) {
623 if (excluded_below >= 0) {
624 if (file->dir.depth > excluded_below)
628 if (check_filter(&server_filter_list, fname,
629 S_ISDIR(file->mode)) < 0) {
630 if (S_ISDIR(file->mode))
631 excluded_below = file->dir.depth;
635 "skipping server-excluded file \"%s\"\n",
642 if (missing_below >= 0 && file->dir.depth <= missing_below) {
650 if (fuzzy_basis && S_ISREG(file->mode)) {
651 char *dn = file->dirname ? file->dirname : ".";
652 if (fuzzy_dirname != dn
653 && strcmp(fuzzy_dirname, dn) != 0) {
655 flist_free(fuzzy_dirlist);
656 fuzzy_dirlist = get_dirlist(dn, -1, 1);
661 statret = link_stat(fname, &st,
662 keep_dirlinks && S_ISDIR(file->mode));
666 if (only_existing && statret == -1 && stat_errno == ENOENT) {
667 /* we only want to update existing files */
669 rprintf(FINFO, "not creating new file \"%s\"\n",
675 if (statret == 0 && !preserve_perms
676 && S_ISDIR(st.st_mode) == S_ISDIR(file->mode)) {
677 /* if the file exists already and we aren't perserving
678 * permissions then act as though the remote end sent
679 * us the file permissions we already have */
680 file->mode = (file->mode & ~CHMOD_BITS)
681 | (st.st_mode & CHMOD_BITS);
684 if (S_ISDIR(file->mode)) {
685 /* The file to be received is a directory, so we need
686 * to prepare appropriately. If there is already a
687 * file of that name and it is *not* a directory, then
688 * we need to delete it. If it doesn't exist, then
689 * (perhaps recursively) create it. */
690 if (statret == 0 && !S_ISDIR(st.st_mode)) {
691 if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
695 if (dry_run && statret != 0 && missing_below < 0) {
696 missing_below = file->dir.depth;
699 if (itemizing && f_out != -1) {
700 itemize(file, ndx, statret, &st,
701 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
703 if (statret != 0 && do_mkdir(fname,file->mode) != 0 && errno != EEXIST) {
704 if (!relative_paths || errno != ENOENT
705 || create_directory_path(fname, orig_umask) < 0
706 || do_mkdir(fname, file->mode) < 0) {
707 rsyserr(FERROR, errno,
708 "recv_generator: mkdir %s failed",
712 if (set_perms(fname, file, statret ? NULL : &st, 0)
713 && verbose && code && f_out != -1)
714 rprintf(code, "%s/\n", safe_fname(fname));
715 if (delete_during && f_out != -1 && !phase && dry_run < 2
716 && (file->flags & FLAG_DEL_HERE))
717 delete_in_dir(the_file_list, fname, file);
721 if (max_size && file->length > max_size) {
723 rprintf(FINFO, "%s is over max-size\n",
729 if (preserve_links && S_ISLNK(file->mode)) {
731 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
734 "ignoring unsafe symlink %s -> \"%s\"\n",
736 safe_fname(file->u.link));
741 char lnk[MAXPATHLEN];
744 if (!S_ISDIR(st.st_mode)
745 && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
747 /* A link already pointing to the
748 * right place -- no further action
750 if (strcmp(lnk, file->u.link) == 0) {
752 itemize(file, ndx, 0, &st, 0,
755 set_perms(fname, file, &st,
760 /* Not the right symlink (or not a symlink), so
762 if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
764 if (!S_ISLNK(st.st_mode))
767 if (do_symlink(file->u.link,fname) != 0) {
768 rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
769 full_fname(fname), safe_fname(file->u.link));
771 set_perms(fname,file,NULL,0);
773 itemize(file, ndx, statret, &st,
774 ITEM_LOCAL_CHANGE, 0, NULL);
776 if (code && verbose) {
777 rprintf(code, "%s -> %s\n", safe_fname(fname),
778 safe_fname(file->u.link));
780 if (remove_sent_files && !dry_run) {
782 SIVAL(numbuf, 0, ndx);
783 send_msg(MSG_SUCCESS, numbuf, 4);
790 if (am_root && preserve_devices && IS_DEVICE(file->mode)) {
792 st.st_mode != file->mode ||
793 st.st_rdev != file->u.rdev) {
794 if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
796 if (!IS_DEVICE(st.st_mode))
799 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
801 (int)file->mode, (int)file->u.rdev);
803 if (do_mknod(fname,file->mode,file->u.rdev) != 0) {
804 rsyserr(FERROR, errno, "mknod %s failed",
807 set_perms(fname,file,NULL,0);
809 itemize(file, ndx, statret, &st,
810 ITEM_LOCAL_CHANGE, 0, NULL);
812 if (code && verbose) {
813 rprintf(code, "%s\n",
819 itemize(file, ndx, statret, &st, 0, 0, NULL);
820 set_perms(fname, file, &st, maybe_PERMS_REPORT);
825 if (preserve_hard_links && hard_link_check(file, ndx, HL_CHECK_MASTER))
828 if (!S_ISREG(file->mode)) {
829 rprintf(FINFO, "skipping non-regular file \"%s\"\n",
834 if (opt_ignore_existing && statret == 0) {
836 rprintf(FINFO, "%s exists\n", safe_fname(fname));
840 if (update_only && statret == 0
841 && cmp_modtime(st.st_mtime, file->modtime) > 0) {
843 rprintf(FINFO, "%s is newer\n", safe_fname(fname));
848 fnamecmp_type = FNAMECMP_FNAME;
850 if (statret == 0 && !S_ISREG(st.st_mode)) {
851 if (delete_item(fname, st.st_mode, DEL_TERSE) != 0)
857 if (statret != 0 && basis_dir[0] != NULL) {
862 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
863 basis_dir[i], fname);
864 if (link_stat(fnamecmpbuf, &st, 0) < 0
865 || !S_ISREG(st.st_mode))
867 switch (match_level) {
873 if (!unchanged_file(fnamecmpbuf, file, &st))
881 if (!unchanged_attrs(file, &st))
888 } while (basis_dir[++i] != NULL);
891 if (i != best_match) {
893 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
894 basis_dir[i], fname);
895 if (link_stat(fnamecmpbuf, &st, 0) < 0) {
902 if (link_dest && match_level == 3) {
903 if (hard_link_one(file, ndx, fname, -1, &st,
905 itemizing && verbose > 1,
909 rsyserr(FINFO, errno, "link %s => %s",
910 full_fname(fnamecmpbuf),
916 if (match_level == 2) {
917 /* Copy the file locally. */
918 if (copy_file(fnamecmpbuf, fname, file->mode) < 0) {
920 rsyserr(FINFO, errno,
921 "copy_file %s => %s",
922 full_fname(fnamecmpbuf),
928 set_perms(fname, file, NULL, 0);
929 } else if (compare_dest || match_level == 1) {
930 fnamecmp = fnamecmpbuf;
939 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
940 && link_stat(partialptr, &partial_st, 0) == 0
941 && S_ISREG(partial_st.st_mode)) {
943 goto prepare_to_open;
947 if (statret != 0 && fuzzy_basis && dry_run <= 1) {
948 int j = find_fuzzy(file, fuzzy_dirlist);
950 fuzzy_file = fuzzy_dirlist->files[j];
951 f_name_to(fuzzy_file, fnamecmpbuf);
953 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
954 safe_fname(fname), safe_fname(fnamecmpbuf));
956 st.st_size = fuzzy_file->length;
958 fnamecmp = fnamecmpbuf;
959 fnamecmp_type = FNAMECMP_FUZZY;
964 if (preserve_hard_links && hard_link_check(file, ndx, HL_SKIP))
966 if (stat_errno == ENOENT)
969 rsyserr(FERROR, stat_errno,
970 "recv_generator: failed to stat %s",
976 if (!compare_dest && fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
978 else if (fnamecmp_type == FNAMECMP_FUZZY)
980 else if (unchanged_file(fnamecmp, file, &st)) {
981 if (fnamecmp_type == FNAMECMP_FNAME) {
983 itemize(file, ndx, real_ret, &real_st,
986 set_perms(fname, file, &st, maybe_PERMS_REPORT);
987 if (preserve_hard_links && file->link_u.links)
988 hard_link_cluster(file, ndx, itemizing, code);
991 /* Only --compare-dest gets here. */
992 itemize(file, ndx, real_ret, &real_st,
993 ITEM_NO_DEST_AND_NO_UPDATE, 0, NULL);
1000 fnamecmp = partialptr;
1001 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1005 if (dry_run || read_batch || whole_file)
1009 int j = flist_find(fuzzy_dirlist, file);
1010 if (j >= 0) /* don't use changing file as future fuzzy basis */
1011 fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1015 fd = do_open(fnamecmp, O_RDONLY, 0);
1018 rsyserr(FERROR, errno, "failed to open %s, continuing",
1019 full_fname(fnamecmp));
1021 /* pretend the file didn't exist */
1022 if (preserve_hard_links && hard_link_check(file, ndx, HL_SKIP))
1024 statret = real_ret = -1;
1028 if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1029 if (!(backupptr = get_backup_name(fname))) {
1033 if (!(back_file = make_file(fname, NULL, NO_FILTERS))) {
1035 goto pretend_missing;
1037 if (robust_unlink(backupptr) && errno != ENOENT) {
1038 rsyserr(FERROR, errno, "unlink %s",
1039 full_fname(backupptr));
1044 if ((f_copy = do_open(backupptr,
1045 O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1046 rsyserr(FERROR, errno, "open %s",
1047 full_fname(backupptr));
1052 fnamecmp_type = FNAMECMP_BACKUP;
1056 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1057 safe_fname(fnamecmp), (double)st.st_size);
1061 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1064 write_int(f_out, ndx);
1066 int iflags = ITEM_TRANSFER;
1067 if (always_checksum)
1068 iflags |= ITEM_REPORT_CHECKSUM;
1069 if (fnamecmp_type != FNAMECMP_FNAME)
1070 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1071 if (fnamecmp_type == FNAMECMP_FUZZY)
1072 iflags |= ITEM_XNAME_FOLLOWS;
1073 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1074 fuzzy_file ? fuzzy_file->basename : NULL);
1078 if (preserve_hard_links && file->link_u.links)
1079 hard_link_cluster(file, ndx, itemizing, code);
1085 if (statret != 0 || whole_file) {
1086 write_sum_head(f_out, NULL);
1090 generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1094 set_perms(backupptr, back_file, NULL, 0);
1096 rprintf(FINFO, "backed up %s to %s\n",
1097 safe_fname(fname), safe_fname(backupptr));
1106 void generate_files(int f_out, struct file_list *flist, char *local_name)
1109 char fbuf[MAXPATHLEN];
1110 int itemizing, maybe_PERMS_REPORT;
1112 int need_retouch_dir_times = preserve_times && !omit_dir_times;
1113 int need_retouch_dir_perms = 0;
1114 int save_only_existing = only_existing;
1115 int save_opt_ignore_existing = opt_ignore_existing;
1116 int save_do_progress = do_progress;
1118 allowed_lull = read_batch ? 0 : (io_timeout + 1) / 2;
1119 lull_mod = allowed_lull * 5;
1121 if (protocol_version >= 29) {
1123 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1124 code = daemon_log_format_has_i ? 0 : FLOG;
1125 } else if (am_daemon) {
1126 itemizing = daemon_log_format_has_i && !dry_run;
1127 maybe_PERMS_REPORT = PERMS_REPORT;
1128 code = itemizing || dry_run ? FCLIENT : FINFO;
1129 } else if (!am_server) {
1130 itemizing = log_format_has_i;
1131 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1132 code = itemizing ? 0 : FINFO;
1135 maybe_PERMS_REPORT = PERMS_REPORT;
1140 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1141 (long)getpid(), flist->count);
1144 if (delete_before && !local_name && flist->count > 0)
1145 do_delete_pass(flist);
1151 rprintf(FINFO, "delta-transmission %s\n",
1153 ? "disabled for local transfer or --whole-file"
1157 if (protocol_version < 29)
1160 for (i = 0; i < flist->count; i++) {
1161 struct file_struct *file = flist->files[i];
1163 if (!file->basename)
1166 recv_generator(local_name ? local_name : f_name_to(file, fbuf),
1167 file, i, itemizing, maybe_PERMS_REPORT, code,
1170 /* We need to ensure that any dirs we create have writeable
1171 * permissions during the time we are putting files within
1172 * them. This is then fixed after the transfer is done. */
1173 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)) {
1174 int mode = file->mode | S_IWUSR; /* user write */
1175 char *fname = local_name ? local_name : fbuf;
1176 if (do_chmod(fname, mode & CHMOD_BITS) < 0) {
1177 rsyserr(FERROR, errno,
1178 "failed to modify permissions on %s",
1181 need_retouch_dir_perms = 1;
1184 if (preserve_hard_links)
1185 check_for_finished_hlinks(itemizing, code);
1187 if (allowed_lull && !(i % lull_mod))
1188 maybe_send_keepalive();
1190 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1192 delete_in_dir(NULL, NULL, NULL);
1195 csum_length = SUM_LENGTH;
1196 only_existing = max_size = opt_ignore_existing = 0;
1197 update_only = always_checksum = size_only = 0;
1199 make_backups = 0; /* avoid a duplicate backup for inplace processing */
1201 /* We expect to just sit around now, so don't exit on a timeout.
1202 * If we really get a timeout then the other process should exit. */
1206 rprintf(FINFO,"generate_files phase=%d\n",phase);
1208 write_int(f_out, -1);
1210 /* files can cycle through the system more than once
1211 * to catch initial checksum errors */
1212 while ((i = get_redo_num(itemizing, code)) != -1) {
1213 struct file_struct *file = flist->files[i];
1214 recv_generator(local_name ? local_name : f_name_to(file, fbuf),
1215 file, i, itemizing, maybe_PERMS_REPORT, code,
1220 only_existing = save_only_existing;
1221 opt_ignore_existing = save_opt_ignore_existing;
1224 rprintf(FINFO,"generate_files phase=%d\n",phase);
1226 write_int(f_out, -1);
1227 /* Reduce round-trip lag-time for a useless delay-updates phase. */
1228 if (protocol_version >= 29 && !delay_updates)
1229 write_int(f_out, -1);
1231 /* Read MSG_DONE for the redo phase (and any prior messages). */
1232 get_redo_num(itemizing, code);
1234 if (protocol_version >= 29) {
1237 rprintf(FINFO, "generate_files phase=%d\n", phase);
1239 write_int(f_out, -1);
1240 /* Read MSG_DONE for delay-updates phase & prior messages. */
1241 get_redo_num(itemizing, code);
1244 do_progress = save_do_progress;
1245 if (delete_after && !local_name && flist->count > 0)
1246 do_delete_pass(flist);
1248 if ((need_retouch_dir_perms || need_retouch_dir_times)
1249 && !list_only && !local_name && !dry_run) {
1251 /* Now we need to fix any directory permissions that were
1252 * modified during the transfer and/or re-set any tweaked
1253 * modified-time values. */
1254 for (i = 0; i < flist->count; i++) {
1255 struct file_struct *file = flist->files[i];
1256 if (!file->basename || !S_ISDIR(file->mode))
1258 if (!need_retouch_dir_times && file->mode & S_IWUSR)
1260 recv_generator(f_name(file), file, i, itemizing,
1261 maybe_PERMS_REPORT, code, -1);
1262 if (allowed_lull && !(j++ % lull_mod))
1263 maybe_send_keepalive();
1266 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1268 if (max_delete > 0 && deletion_count > max_delete) {
1270 "Deletions stopped due to --max-delete limit (%d skipped)\n",
1271 deletion_count - max_delete);
1272 io_error |= IOERR_DEL_LIMIT;
1276 rprintf(FINFO,"generate_files finished\n");