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 ignore_existing;
56 extern int ignore_non_existing;
58 extern int append_mode;
59 extern int make_backups;
60 extern int csum_length;
61 extern int ignore_times;
63 extern OFF_T max_size;
64 extern OFF_T min_size;
66 extern int allowed_lull;
67 extern int sock_f_out;
68 extern int ignore_timeout;
69 extern int protocol_version;
70 extern int fuzzy_basis;
71 extern int always_checksum;
72 extern int checksum_len;
73 extern char *partial_dir;
74 extern char *basis_dir[];
75 extern int compare_dest;
78 extern int whole_file;
80 extern int read_batch;
81 extern int orig_umask;
82 extern int safe_symlinks;
83 extern long block_size; /* "long" because popt can't set an int32. */
84 extern int max_delete;
85 extern int force_delete;
86 extern int one_file_system;
87 extern struct stats stats;
88 extern dev_t filesystem_dev;
89 extern char *backup_dir;
90 extern char *backup_suffix;
91 extern int backup_suffix_len;
92 extern struct file_list *the_file_list;
93 extern struct filter_list_struct server_filter_list;
95 static int deletion_count = 0; /* used to implement --max-delete */
97 /* For calling delete_file() */
98 #define DEL_FORCE_RECURSE (1<<1) /* recurse even w/o --force */
99 #define DEL_TERSE (1<<3)
102 static int is_backup_file(char *fn)
104 int k = strlen(fn) - backup_suffix_len;
105 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
109 /* Delete a file or directory. If DEL_FORCE_RECURSE is set in the flags, or if
110 * force_delete is set, this will delete recursively.
112 * Note that fname must point to a MAXPATHLEN buffer if the mode indicates it's
113 * a directory! (The buffer is used for recursion, but returned unchanged.)
115 static int delete_item(char *fname, int mode, int flags)
117 struct file_list *dirlist;
118 int j, dlen, zap_dir, ok;
123 if (!S_ISDIR(mode)) {
124 if (max_delete && ++deletion_count > max_delete)
126 if (make_backups && (backup_dir || !is_backup_file(fname)))
127 ok = make_backup(fname);
129 ok = robust_unlink(fname) == 0;
131 if (!(flags & DEL_TERSE))
132 log_delete(fname, mode);
135 if (errno == ENOENT) {
139 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
144 zap_dir = flags & DEL_FORCE_RECURSE || (force_delete && recurse);
145 if ((max_delete && ++deletion_count > max_delete)
146 || (dry_run && zap_dir)) {
149 } else if (make_backups && !backup_dir && !is_backup_file(fname)
150 && !(flags & DEL_FORCE_RECURSE))
151 ok = make_backup(fname);
153 ok = do_rmdir(fname) == 0;
155 if (!(flags & DEL_TERSE))
156 log_delete(fname, mode);
159 if (errno == ENOENT) {
164 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
168 flags |= DEL_FORCE_RECURSE; /* mark subdir dels as not "in the way" */
171 dlen = strlen(fname);
172 save_filters = push_local_filters(fname, dlen);
174 dirlist = get_dirlist(fname, dlen, 0);
177 if (dlen != 1 || *fname != '/')
179 remainder = MAXPATHLEN - (p - fname);
181 for (j = dirlist->count; j--; ) {
182 struct file_struct *fp = dirlist->files[j];
184 if (fp->flags & FLAG_MOUNT_POINT)
187 strlcpy(p, fp->basename, remainder);
188 delete_item(fname, fp->mode, flags & ~DEL_TERSE);
194 pop_local_filters(save_filters);
196 if (max_delete && ++deletion_count > max_delete)
199 if (do_rmdir(fname) == 0) {
200 if (!(flags & DEL_TERSE))
201 log_delete(fname, mode);
202 } else if (errno != ENOTEMPTY && errno != EEXIST && errno != ENOENT) {
203 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
212 /* This function is used to implement per-directory deletion, and is used by
213 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
214 * MAXPATHLEN buffer with the name of the directory in it (the functions we
215 * call will append names onto the end, but the old dir value will be restored
217 static void delete_in_dir(struct file_list *flist, char *fbuf,
218 struct file_struct *file)
220 static int min_depth = MAXPATHLEN, cur_depth = -1;
221 static void *filt_array[MAXPATHLEN/2+1];
222 static int already_warned = 0;
223 struct file_list *dirlist;
224 char delbuf[MAXPATHLEN];
229 while (cur_depth >= min_depth)
230 pop_local_filters(filt_array[cur_depth--]);
231 min_depth = MAXPATHLEN;
237 rprintf(FINFO, "delete_in_dir(%s)\n", safe_fname(fbuf));
240 maybe_send_keepalive();
242 if (file->dir.depth >= MAXPATHLEN/2+1)
243 return; /* Impossible... */
245 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
249 "IO error encountered -- skipping file deletion\n");
254 while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
255 pop_local_filters(filt_array[cur_depth--]);
256 cur_depth = file->dir.depth;
257 if (min_depth > cur_depth)
258 min_depth = cur_depth;
260 filt_array[cur_depth] = push_local_filters(fbuf, dlen);
262 if (link_stat(fbuf, &st, keep_dirlinks) < 0)
265 if (one_file_system) {
266 if (file->flags & FLAG_TOP_DIR)
267 filesystem_dev = st.st_dev;
268 else if (filesystem_dev != st.st_dev)
272 dirlist = get_dirlist(fbuf, dlen, 0);
274 /* If an item in dirlist is not found in flist, delete it
275 * from the filesystem. */
276 for (i = dirlist->count; i--; ) {
277 struct file_struct *fp = dirlist->files[i];
278 if (!fp->basename || fp->flags & FLAG_MOUNT_POINT)
280 if (flist_find(flist, fp) < 0) {
282 f_name_to(fp, delbuf);
283 delete_item(delbuf, mode, DEL_FORCE_RECURSE);
290 /* This deletes any files on the receiving side that are not present on the
291 * sending side. This is used by --delete-before and --delete-after. */
292 static void do_delete_pass(struct file_list *flist)
294 char fbuf[MAXPATHLEN];
297 if (dry_run > 1 /* destination doesn't exist yet */
301 for (j = 0; j < flist->count; j++) {
302 struct file_struct *file = flist->files[j];
304 if (!(file->flags & FLAG_DEL_HERE))
307 f_name_to(file, fbuf);
308 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
309 rprintf(FINFO, "deleting in %s\n", safe_fname(fbuf));
311 delete_in_dir(flist, fbuf, file);
313 delete_in_dir(NULL, NULL, NULL);
315 if (do_progress && !am_server)
316 rprintf(FINFO, " \r");
319 static int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
322 && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
325 if (am_root && preserve_uid && st->st_uid != file->uid)
328 if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
335 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
336 int32 iflags, uchar fnamecmp_type, char *xname)
339 if (S_ISREG(file->mode) && file->length != st->st_size)
340 iflags |= ITEM_REPORT_SIZE;
341 if (!(iflags & ITEM_NO_DEST_AND_NO_UPDATE)) {
342 int keep_time = !preserve_times ? 0
343 : S_ISDIR(file->mode) ? !omit_dir_times
344 : !S_ISLNK(file->mode);
346 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
347 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
348 || (keep_time && cmp_modtime(file->modtime, st->st_mtime) != 0))
349 iflags |= ITEM_REPORT_TIME;
351 && (file->mode & CHMOD_BITS) != (st->st_mode & CHMOD_BITS))
352 iflags |= ITEM_REPORT_PERMS;
353 if (preserve_uid && am_root && file->uid != st->st_uid)
354 iflags |= ITEM_REPORT_OWNER;
355 if (preserve_gid && file->gid != GID_NONE
356 && st->st_gid != file->gid)
357 iflags |= ITEM_REPORT_GROUP;
360 iflags |= ITEM_IS_NEW;
363 if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
364 || (xname && *xname)) && !read_batch) {
365 if (protocol_version >= 29) {
367 write_int(sock_f_out, ndx);
368 write_shortint(sock_f_out, iflags);
369 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
370 write_byte(sock_f_out, fnamecmp_type);
371 if (iflags & ITEM_XNAME_FOLLOWS)
372 write_vstring(sock_f_out, xname, strlen(xname));
374 log_item(file, &stats, iflags, xname);
379 /* Perform our quick-check heuristic for determining if a file is unchanged. */
380 static int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
382 if (st->st_size != file->length)
385 /* if always checksum is set then we use the checksum instead
386 of the file time to determine whether to sync */
387 if (always_checksum && S_ISREG(st->st_mode)) {
388 char sum[MD4_SUM_LENGTH];
389 file_checksum(fn, sum, st->st_size);
390 return memcmp(sum, file->u.sum, checksum_len) == 0;
399 return cmp_modtime(st->st_mtime, file->modtime) == 0;
404 * set (initialize) the size entries in the per-file sum_struct
405 * calculating dynamic block and checksum sizes.
407 * This is only called from generate_and_send_sums() but is a separate
408 * function to encapsulate the logic.
410 * The block size is a rounded square root of file length.
412 * The checksum size is determined according to:
413 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
414 * provided by Donovan Baarda which gives a probability of rsync
415 * algorithm corrupting data and falling back using the whole md4
418 * This might be made one of several selectable heuristics.
420 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
426 blength = block_size;
427 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
428 blength = BLOCK_SIZE;
433 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
434 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
435 blength = MAX_BLOCK_SIZE;
440 if (len < (int64)blength * blength)
443 } while (c >= 8); /* round to multiple of 8 */
444 blength = MAX(blength, BLOCK_SIZE);
448 if (protocol_version < 27) {
449 s2length = csum_length;
450 } else if (csum_length == SUM_LENGTH) {
451 s2length = SUM_LENGTH;
455 int b = BLOCKSUM_BIAS;
456 for (l = len; l >>= 1; b += 2) {}
457 for (c = blength; c >>= 1 && b; b--) {}
458 /* add a bit, subtract rollsum, round up. */
459 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
460 s2length = MAX(s2length, csum_length);
461 s2length = MIN(s2length, SUM_LENGTH);
465 sum->blength = blength;
466 sum->s2length = s2length;
467 sum->remainder = len % blength;
468 sum->count = len / blength + (sum->remainder != 0);
470 if (sum->count && verbose > 2) {
472 "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
473 (double)sum->count, (long)sum->remainder, (long)sum->blength,
474 sum->s2length, (double)sum->flength);
480 * Generate and send a stream of signatures/checksums that describe a buffer
482 * Generate approximately one checksum every block_len bytes.
484 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
487 struct map_struct *mapbuf;
488 struct sum_struct sum;
491 sum_sizes_sqroot(&sum, len);
492 write_sum_head(f_out, &sum);
494 if (append_mode > 0 && f_copy < 0)
498 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
502 for (i = 0; i < sum.count; i++) {
503 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
504 char *map = map_ptr(mapbuf, offset, n1);
505 char sum2[SUM_LENGTH];
512 full_write(f_copy, map, n1);
517 sum1 = get_checksum1(map, n1);
518 get_checksum2(map, n1, sum2);
522 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
523 (double)i, (double)offset - n1, (long)n1,
524 (unsigned long)sum1);
526 write_int(f_out, sum1);
527 write_buf(f_out, sum2, sum.s2length);
535 /* Try to find a filename in the same dir as "fname" with a similar name. */
536 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
538 int fname_len, fname_suf_len;
539 const char *fname_suf, *fname = file->basename;
540 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
541 int j, lowest_j = -1;
543 fname_len = strlen(fname);
544 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
546 for (j = 0; j < dirlist->count; j++) {
547 struct file_struct *fp = dirlist->files[j];
548 const char *suf, *name;
552 if (!S_ISREG(fp->mode) || !fp->length
553 || fp->flags & FLAG_NO_FUZZY)
558 if (fp->length == file->length
559 && cmp_modtime(fp->modtime, file->modtime) == 0) {
562 "fuzzy size/modtime match for %s\n",
569 suf = find_filename_suffix(name, len, &suf_len);
571 dist = fuzzy_distance(name, len, fname, fname_len);
572 /* Add some extra weight to how well the suffixes match. */
573 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
576 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
577 name, (int)(dist>>16), (int)(dist&0xFFFF));
579 if (dist <= lowest_dist) {
588 void check_for_finished_hlinks(int itemizing, enum logcode code)
590 struct file_struct *file;
593 while ((ndx = get_hlink_num()) != -1) {
594 if (ndx < 0 || ndx >= the_file_list->count)
597 file = the_file_list->files[ndx];
598 if (!file->link_u.links)
601 hard_link_cluster(file, ndx, itemizing, code);
605 static int phase = 0;
607 /* Acts on the_file_list->file's ndx'th item, whose name is fname. If a dir,
608 * make sure it exists, and has the right permissions/timestamp info. For
609 * all other non-regular files (symlinks, etc.) we create them here. For
610 * regular files that have changed, we try to find a basis file and then
611 * start sending checksums.
613 * When fname is non-null, it must point to a MAXPATHLEN buffer!
615 * Note that f_out is set to -1 when doing final directory-permission and
616 * modification-time repair. */
617 static void recv_generator(char *fname, struct file_struct *file, int ndx,
618 int itemizing, int maybe_PERMS_REPORT,
619 enum logcode code, int f_out)
621 static int missing_below = -1, excluded_below = -1;
622 static char *fuzzy_dirname = "";
623 static struct file_list *fuzzy_dirlist = NULL;
624 struct file_struct *fuzzy_file = NULL;
625 int fd = -1, f_copy = -1;
626 STRUCT_STAT st, real_st, partial_st;
627 struct file_struct *back_file = NULL;
628 int statret, real_ret, stat_errno;
629 char *fnamecmp, *partialptr, *backupptr = NULL;
630 char fnamecmpbuf[MAXPATHLEN];
638 flist_free(fuzzy_dirlist);
639 fuzzy_dirlist = NULL;
642 if (missing_below >= 0) {
650 rprintf(FINFO, "recv_generator(%s,%d)\n",
651 safe_fname(fname), ndx);
654 if (server_filter_list.head) {
655 if (excluded_below >= 0) {
656 if (file->dir.depth > excluded_below)
660 if (check_filter(&server_filter_list, fname,
661 S_ISDIR(file->mode)) < 0) {
662 if (S_ISDIR(file->mode))
663 excluded_below = file->dir.depth;
667 "skipping server-excluded file \"%s\"\n",
674 if (missing_below >= 0 && file->dir.depth <= missing_below) {
682 if (fuzzy_basis && S_ISREG(file->mode)) {
683 char *dn = file->dirname ? file->dirname : ".";
684 if (fuzzy_dirname != dn
685 && strcmp(fuzzy_dirname, dn) != 0) {
687 flist_free(fuzzy_dirlist);
688 fuzzy_dirlist = get_dirlist(dn, -1, 1);
693 statret = link_stat(fname, &st,
694 keep_dirlinks && S_ISDIR(file->mode));
698 if (ignore_non_existing && statret == -1 && stat_errno == ENOENT) {
700 rprintf(FINFO, "not creating new %s \"%s\"\n",
701 S_ISDIR(file->mode) ? "directory" : "file",
707 if (statret == 0 && !preserve_perms
708 && S_ISDIR(st.st_mode) == S_ISDIR(file->mode)) {
709 /* if the file exists already and we aren't perserving
710 * permissions then act as though the remote end sent
711 * us the file permissions we already have */
712 file->mode = (file->mode & ~CHMOD_BITS)
713 | (st.st_mode & CHMOD_BITS);
716 if (S_ISDIR(file->mode)) {
717 /* The file to be received is a directory, so we need
718 * to prepare appropriately. If there is already a
719 * file of that name and it is *not* a directory, then
720 * we need to delete it. If it doesn't exist, then
721 * (perhaps recursively) create it. */
722 if (statret == 0 && !S_ISDIR(st.st_mode)) {
723 if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
727 if (dry_run && statret != 0 && missing_below < 0) {
728 missing_below = file->dir.depth;
731 if (itemizing && f_out != -1) {
732 itemize(file, ndx, statret, &st,
733 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
735 if (statret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
736 if (!relative_paths || errno != ENOENT
737 || create_directory_path(fname, orig_umask) < 0
738 || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
739 rsyserr(FERROR, errno,
740 "recv_generator: mkdir %s failed",
744 if (set_perms(fname, file, statret ? NULL : &st, 0)
745 && verbose && code && f_out != -1)
746 rprintf(code, "%s/\n", safe_fname(fname));
747 if (delete_during && f_out != -1 && !phase && dry_run < 2
748 && (file->flags & FLAG_DEL_HERE))
749 delete_in_dir(the_file_list, fname, file);
753 if (preserve_hard_links && file->link_u.links
754 && hard_link_check(file, ndx, fname, statret, &st,
755 itemizing, code, HL_CHECK_MASTER))
758 if (preserve_links && S_ISLNK(file->mode)) {
760 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
762 if (the_file_list->count == 1)
763 fname = f_name(file);
765 "ignoring unsafe symlink %s -> \"%s\"\n",
767 safe_fname(file->u.link));
772 char lnk[MAXPATHLEN];
775 if (!S_ISDIR(st.st_mode)
776 && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
778 /* A link already pointing to the
779 * right place -- no further action
781 if (strcmp(lnk, file->u.link) == 0) {
783 itemize(file, ndx, 0, &st, 0,
786 set_perms(fname, file, &st,
788 if (preserve_hard_links
789 && file->link_u.links) {
790 hard_link_cluster(file, ndx,
797 /* Not the right symlink (or not a symlink), so
799 if (delete_item(fname, st.st_mode, DEL_TERSE) < 0)
801 if (!S_ISLNK(st.st_mode))
804 if (preserve_hard_links && file->link_u.links
805 && hard_link_check(file, ndx, fname, -1, &st,
806 itemizing, code, HL_SKIP))
808 if (do_symlink(file->u.link,fname) != 0) {
809 rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
810 full_fname(fname), safe_fname(file->u.link));
812 set_perms(fname,file,NULL,0);
814 itemize(file, ndx, statret, &st,
815 ITEM_LOCAL_CHANGE, 0, NULL);
817 if (code && verbose) {
818 rprintf(code, "%s -> %s\n", safe_fname(fname),
819 safe_fname(file->u.link));
821 if (remove_sent_files && !dry_run) {
823 SIVAL(numbuf, 0, ndx);
824 send_msg(MSG_SUCCESS, numbuf, 4);
826 if (preserve_hard_links && file->link_u.links)
827 hard_link_cluster(file, ndx, itemizing, code);
833 if (am_root && preserve_devices && IS_DEVICE(file->mode)) {
835 || (st.st_mode & ~CHMOD_BITS) != (file->mode & ~CHMOD_BITS)
836 || st.st_rdev != file->u.rdev) {
838 && delete_item(fname, st.st_mode, DEL_TERSE) < 0)
840 if (preserve_hard_links && file->link_u.links
841 && hard_link_check(file, ndx, fname, -1, &st,
842 itemizing, code, HL_SKIP))
844 if (!IS_DEVICE(st.st_mode))
847 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
849 (int)file->mode, (int)file->u.rdev);
851 if (do_mknod(fname,file->mode,file->u.rdev) < 0) {
852 rsyserr(FERROR, errno, "mknod %s failed",
855 set_perms(fname,file,NULL,0);
857 itemize(file, ndx, statret, &st,
858 ITEM_LOCAL_CHANGE, 0, NULL);
860 if (code && verbose) {
861 rprintf(code, "%s\n",
864 if (preserve_hard_links && file->link_u.links) {
865 hard_link_cluster(file, ndx,
871 itemize(file, ndx, statret, &st, 0, 0, NULL);
872 set_perms(fname, file, &st, maybe_PERMS_REPORT);
873 if (preserve_hard_links && file->link_u.links)
874 hard_link_cluster(file, ndx, itemizing, code);
879 if (!S_ISREG(file->mode)) {
880 if (the_file_list->count == 1)
881 fname = f_name(file);
882 rprintf(FINFO, "skipping non-regular file \"%s\"\n",
887 if (max_size && file->length > max_size) {
889 if (the_file_list->count == 1)
890 fname = f_name(file);
891 rprintf(FINFO, "%s is over max-size\n",
896 if (min_size && file->length < min_size) {
898 if (the_file_list->count == 1)
899 fname = f_name(file);
900 rprintf(FINFO, "%s is under min-size\n",
906 if (ignore_existing && statret == 0) {
908 rprintf(FINFO, "%s exists\n", safe_fname(fname));
912 if (update_only && statret == 0
913 && cmp_modtime(st.st_mtime, file->modtime) > 0) {
915 rprintf(FINFO, "%s is newer\n", safe_fname(fname));
920 fnamecmp_type = FNAMECMP_FNAME;
922 if (statret == 0 && !S_ISREG(st.st_mode)) {
923 if (delete_item(fname, st.st_mode, DEL_TERSE) != 0)
929 if (statret != 0 && basis_dir[0] != NULL) {
934 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
935 basis_dir[i], fname);
936 if (link_stat(fnamecmpbuf, &st, 0) < 0
937 || !S_ISREG(st.st_mode))
939 switch (match_level) {
945 if (!unchanged_file(fnamecmpbuf, file, &st))
953 if (!unchanged_attrs(file, &st))
960 } while (basis_dir[++i] != NULL);
963 if (i != best_match) {
965 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
966 basis_dir[i], fname);
967 if (link_stat(fnamecmpbuf, &st, 0) < 0) {
974 if (link_dest && match_level == 3) {
975 if (hard_link_one(file, ndx, fname, -1, &st,
977 itemizing && verbose > 1,
979 if (preserve_hard_links
980 && file->link_u.links) {
981 hard_link_cluster(file, ndx,
990 if (match_level == 2) {
991 /* Copy the file locally. */
992 if (copy_file(fnamecmpbuf, fname, file->mode) < 0) {
994 rsyserr(FINFO, errno,
995 "copy_file %s => %s",
996 full_fname(fnamecmpbuf),
1003 itemize(file, ndx, 0, &st,
1004 ITEM_LOCAL_CHANGE, 0,
1006 } else if (verbose && code) {
1007 rprintf(code, "%s\n",
1010 set_perms(fname, file, NULL,
1011 maybe_PERMS_REPORT);
1012 if (preserve_hard_links
1013 && file->link_u.links) {
1014 hard_link_cluster(file, ndx,
1020 } else if (compare_dest || match_level == 1) {
1021 fnamecmp = fnamecmpbuf;
1030 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1031 && link_stat(partialptr, &partial_st, 0) == 0
1032 && S_ISREG(partial_st.st_mode)) {
1034 goto prepare_to_open;
1038 if (statret != 0 && fuzzy_basis && dry_run <= 1) {
1039 int j = find_fuzzy(file, fuzzy_dirlist);
1041 fuzzy_file = fuzzy_dirlist->files[j];
1042 f_name_to(fuzzy_file, fnamecmpbuf);
1044 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1045 safe_fname(fname), safe_fname(fnamecmpbuf));
1047 st.st_size = fuzzy_file->length;
1049 fnamecmp = fnamecmpbuf;
1050 fnamecmp_type = FNAMECMP_FUZZY;
1055 if (preserve_hard_links && file->link_u.links
1056 && hard_link_check(file, ndx, fname, statret, &st,
1057 itemizing, code, HL_SKIP))
1059 if (stat_errno == ENOENT)
1061 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1066 if (append_mode && st.st_size > file->length)
1069 if (!compare_dest && fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1071 else if (fnamecmp_type == FNAMECMP_FUZZY)
1073 else if (unchanged_file(fnamecmp, file, &st)) {
1075 do_unlink(partialptr);
1076 handle_partial_dir(partialptr, PDIR_DELETE);
1078 if (fnamecmp_type == FNAMECMP_FNAME) {
1080 itemize(file, ndx, real_ret, &real_st,
1083 set_perms(fname, file, &st, maybe_PERMS_REPORT);
1084 if (preserve_hard_links && file->link_u.links)
1085 hard_link_cluster(file, ndx, itemizing, code);
1088 /* Only --compare-dest gets here. */
1089 itemize(file, ndx, real_ret, &real_st,
1090 ITEM_NO_DEST_AND_NO_UPDATE, 0, NULL);
1097 fnamecmp = partialptr;
1098 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1102 if (!do_xfers || read_batch || whole_file)
1106 int j = flist_find(fuzzy_dirlist, file);
1107 if (j >= 0) /* don't use changing file as future fuzzy basis */
1108 fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1112 fd = do_open(fnamecmp, O_RDONLY, 0);
1115 rsyserr(FERROR, errno, "failed to open %s, continuing",
1116 full_fname(fnamecmp));
1118 /* pretend the file didn't exist */
1119 if (preserve_hard_links && file->link_u.links
1120 && hard_link_check(file, ndx, fname, statret, &st,
1121 itemizing, code, HL_SKIP))
1123 statret = real_ret = -1;
1127 if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1128 if (!(backupptr = get_backup_name(fname))) {
1132 if (!(back_file = make_file(fname, NULL, NO_FILTERS))) {
1134 goto pretend_missing;
1136 if (robust_unlink(backupptr) && errno != ENOENT) {
1137 rsyserr(FERROR, errno, "unlink %s",
1138 full_fname(backupptr));
1143 if ((f_copy = do_open(backupptr,
1144 O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1145 rsyserr(FERROR, errno, "open %s",
1146 full_fname(backupptr));
1151 fnamecmp_type = FNAMECMP_BACKUP;
1155 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1156 safe_fname(fnamecmp), (double)st.st_size);
1160 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1163 write_int(f_out, ndx);
1165 int iflags = ITEM_TRANSFER;
1166 if (always_checksum)
1167 iflags |= ITEM_REPORT_CHECKSUM;
1168 if (fnamecmp_type != FNAMECMP_FNAME)
1169 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1170 if (fnamecmp_type == FNAMECMP_FUZZY)
1171 iflags |= ITEM_XNAME_FOLLOWS;
1172 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1173 fuzzy_file ? fuzzy_file->basename : NULL);
1177 if (preserve_hard_links && file->link_u.links)
1178 hard_link_cluster(file, ndx, itemizing, code);
1184 if (statret != 0 || whole_file) {
1185 write_sum_head(f_out, NULL);
1189 generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1193 set_perms(backupptr, back_file, NULL, 0);
1195 rprintf(FINFO, "backed up %s to %s\n",
1196 safe_fname(fname), safe_fname(backupptr));
1205 void generate_files(int f_out, struct file_list *flist, char *local_name)
1208 char fbuf[MAXPATHLEN];
1209 int itemizing, maybe_PERMS_REPORT;
1211 int lull_mod = allowed_lull * 5;
1212 int need_retouch_dir_times = preserve_times && !omit_dir_times;
1213 int need_retouch_dir_perms = 0;
1214 int save_ignore_existing = ignore_existing;
1215 int save_ignore_non_existing = ignore_non_existing;
1216 int save_do_progress = do_progress;
1217 int save_make_backups = make_backups;
1219 if (protocol_version >= 29) {
1221 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1222 code = daemon_log_format_has_i ? 0 : FLOG;
1223 } else if (am_daemon) {
1224 itemizing = daemon_log_format_has_i && do_xfers;
1225 maybe_PERMS_REPORT = PERMS_REPORT;
1226 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1227 } else if (!am_server) {
1228 itemizing = log_format_has_i;
1229 maybe_PERMS_REPORT = log_format_has_i ? 0 : PERMS_REPORT;
1230 code = itemizing ? 0 : FINFO;
1233 maybe_PERMS_REPORT = PERMS_REPORT;
1238 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1239 (long)getpid(), flist->count);
1242 if (delete_before && !local_name && flist->count > 0)
1243 do_delete_pass(flist);
1246 if (append_mode || whole_file < 0)
1249 rprintf(FINFO, "delta-transmission %s\n",
1251 ? "disabled for local transfer or --whole-file"
1255 /* Since we often fill up the outgoing socket and then just sit around
1256 * waiting for the other 2 processes to do their thing, we don't want
1257 * to exit on a timeout. If the data stops flowing, the receiver will
1258 * notice that and let us know via the redo pipe (or its closing). */
1261 for (i = 0; i < flist->count; i++) {
1262 struct file_struct *file = flist->files[i];
1264 if (!file->basename)
1268 strlcpy(fbuf, local_name, sizeof fbuf);
1270 f_name_to(file, fbuf);
1271 recv_generator(fbuf, file, i, itemizing, maybe_PERMS_REPORT,
1274 /* We need to ensure that any dirs we create have writeable
1275 * permissions during the time we are putting files within
1276 * them. This is then fixed after the transfer is done. */
1278 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1280 int mode = file->mode | S_IWUSR; /* user write */
1281 char *fname = local_name ? local_name : fbuf;
1282 if (do_chmod(fname, mode) < 0) {
1283 rsyserr(FERROR, errno,
1284 "failed to modify permissions on %s",
1287 need_retouch_dir_perms = 1;
1291 if (preserve_hard_links)
1292 check_for_finished_hlinks(itemizing, code);
1294 if (allowed_lull && !(i % lull_mod))
1295 maybe_send_keepalive();
1296 else if (!(i % 200))
1297 maybe_flush_socket();
1299 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1301 delete_in_dir(NULL, NULL, NULL);
1304 csum_length = SUM_LENGTH;
1305 max_size = min_size = ignore_existing = ignore_non_existing = 0;
1306 update_only = always_checksum = size_only = 0;
1308 if (append_mode) /* resend w/o append mode */
1309 append_mode = -1; /* ... but only longer files */
1310 make_backups = 0; /* avoid a duplicate backup for inplace processing */
1313 rprintf(FINFO,"generate_files phase=%d\n",phase);
1315 write_int(f_out, -1);
1317 /* files can cycle through the system more than once
1318 * to catch initial checksum errors */
1319 while ((i = get_redo_num(itemizing, code)) != -1) {
1320 struct file_struct *file = flist->files[i];
1322 strlcpy(fbuf, local_name, sizeof fbuf);
1324 f_name_to(file, fbuf);
1325 recv_generator(fbuf, file, i, itemizing, maybe_PERMS_REPORT,
1330 ignore_non_existing = save_ignore_non_existing;
1331 ignore_existing = save_ignore_existing;
1332 make_backups = save_make_backups;
1335 rprintf(FINFO,"generate_files phase=%d\n",phase);
1337 write_int(f_out, -1);
1338 /* Reduce round-trip lag-time for a useless delay-updates phase. */
1339 if (protocol_version >= 29 && !delay_updates)
1340 write_int(f_out, -1);
1342 /* Read MSG_DONE for the redo phase (and any prior messages). */
1343 get_redo_num(itemizing, code);
1345 if (protocol_version >= 29) {
1348 rprintf(FINFO, "generate_files phase=%d\n", phase);
1350 write_int(f_out, -1);
1351 /* Read MSG_DONE for delay-updates phase & prior messages. */
1352 get_redo_num(itemizing, code);
1355 do_progress = save_do_progress;
1356 if (delete_after && !local_name && flist->count > 0)
1357 do_delete_pass(flist);
1359 if ((need_retouch_dir_perms || need_retouch_dir_times)
1360 && !list_only && !local_name && !dry_run) {
1362 /* Now we need to fix any directory permissions that were
1363 * modified during the transfer and/or re-set any tweaked
1364 * modified-time values. */
1365 for (i = 0; i < flist->count; i++) {
1366 struct file_struct *file = flist->files[i];
1367 if (!file->basename || !S_ISDIR(file->mode))
1369 if (!need_retouch_dir_times && file->mode & S_IWUSR)
1371 recv_generator(f_name(file), file, i, itemizing,
1372 maybe_PERMS_REPORT, code, -1);
1373 if (allowed_lull && !(++j % lull_mod))
1374 maybe_send_keepalive();
1375 else if (!(j % 200))
1376 maybe_flush_socket();
1379 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1381 if (max_delete > 0 && deletion_count > max_delete) {
1383 "Deletions stopped due to --max-delete limit (%d skipped)\n",
1384 deletion_count - max_delete);
1385 io_error |= IOERR_DEL_LIMIT;
1389 rprintf(FINFO,"generate_files finished\n");