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_specials;
42 extern int preserve_hard_links;
43 extern int preserve_perms;
44 extern int preserve_uid;
45 extern int preserve_gid;
46 extern int preserve_times;
47 extern int omit_dir_times;
48 extern int delete_mode;
49 extern int delete_before;
50 extern int delete_during;
51 extern int delete_after;
53 extern int ignore_errors;
54 extern int remove_sent_files;
55 extern int delay_updates;
56 extern int update_only;
57 extern int ignore_existing;
58 extern int ignore_non_existing;
60 extern int append_mode;
61 extern int make_backups;
62 extern int csum_length;
63 extern int ignore_times;
65 extern OFF_T max_size;
66 extern OFF_T min_size;
68 extern int allowed_lull;
69 extern int sock_f_out;
70 extern int ignore_timeout;
71 extern int protocol_version;
72 extern int fuzzy_basis;
73 extern int always_checksum;
74 extern int checksum_len;
75 extern char *partial_dir;
76 extern char *basis_dir[];
77 extern int compare_dest;
80 extern int whole_file;
82 extern int read_batch;
83 extern int orig_umask;
84 extern int safe_symlinks;
85 extern long block_size; /* "long" because popt can't set an int32. */
86 extern int max_delete;
87 extern int force_delete;
88 extern int one_file_system;
89 extern struct stats stats;
90 extern dev_t filesystem_dev;
91 extern char *backup_dir;
92 extern char *backup_suffix;
93 extern int backup_suffix_len;
94 extern struct file_list *the_file_list;
95 extern struct filter_list_struct server_filter_list;
97 static int deletion_count = 0; /* used to implement --max-delete */
98 static int can_link_symlinks = 1; /* start out optimistic */
99 static int can_link_devices = 1;
101 /* For calling delete_file() */
102 #define DEL_FORCE_RECURSE (1<<1) /* recurse even w/o --force */
103 #define DEL_TERSE (1<<3)
106 static int is_backup_file(char *fn)
108 int k = strlen(fn) - backup_suffix_len;
109 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
113 /* Delete a file or directory. If DEL_FORCE_RECURSE is set in the flags, or if
114 * force_delete is set, this will delete recursively.
116 * Note that fname must point to a MAXPATHLEN buffer if the mode indicates it's
117 * a directory! (The buffer is used for recursion, but returned unchanged.)
119 static int delete_item(char *fname, int mode, int flags)
121 struct file_list *dirlist;
122 int j, dlen, zap_dir, ok;
127 if (!S_ISDIR(mode)) {
128 if (max_delete && ++deletion_count > max_delete)
130 if (make_backups && (backup_dir || !is_backup_file(fname)))
131 ok = make_backup(fname);
133 ok = robust_unlink(fname) == 0;
135 if (!(flags & DEL_TERSE))
136 log_delete(fname, mode);
139 if (errno == ENOENT) {
143 rsyserr(FERROR, errno, "delete_file: unlink %s failed",
148 zap_dir = flags & DEL_FORCE_RECURSE || force_delete;
149 if ((max_delete && ++deletion_count > max_delete)
150 || (dry_run && zap_dir)) {
153 } else if (make_backups && !backup_dir && !is_backup_file(fname)
154 && !(flags & DEL_FORCE_RECURSE))
155 ok = make_backup(fname);
157 ok = do_rmdir(fname) == 0;
159 if (!(flags & DEL_TERSE))
160 log_delete(fname, mode);
163 if (errno == ENOENT) {
168 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
172 flags |= DEL_FORCE_RECURSE; /* mark subdir dels as not "in the way" */
175 dlen = strlen(fname);
176 save_filters = push_local_filters(fname, dlen);
178 dirlist = get_dirlist(fname, dlen, 0);
181 if (dlen != 1 || *fname != '/')
183 remainder = MAXPATHLEN - (p - fname);
185 for (j = dirlist->count; j--; ) {
186 struct file_struct *fp = dirlist->files[j];
188 if (fp->flags & FLAG_MOUNT_POINT)
191 strlcpy(p, fp->basename, remainder);
192 delete_item(fname, fp->mode, flags & ~DEL_TERSE);
198 pop_local_filters(save_filters);
200 if (max_delete && ++deletion_count > max_delete)
203 if (do_rmdir(fname) == 0) {
204 if (!(flags & DEL_TERSE))
205 log_delete(fname, mode);
206 } else if (errno != ENOTEMPTY && errno != EEXIST && errno != ENOENT) {
207 rsyserr(FERROR, errno, "delete_file: rmdir %s failed",
216 /* This function is used to implement per-directory deletion, and is used by
217 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
218 * MAXPATHLEN buffer with the name of the directory in it (the functions we
219 * call will append names onto the end, but the old dir value will be restored
221 static void delete_in_dir(struct file_list *flist, char *fbuf,
222 struct file_struct *file, STRUCT_STAT *stp)
224 static int min_depth = MAXPATHLEN, cur_depth = -1;
225 static void *filt_array[MAXPATHLEN/2+1];
226 static int already_warned = 0;
227 struct file_list *dirlist;
228 char delbuf[MAXPATHLEN];
232 while (cur_depth >= min_depth)
233 pop_local_filters(filt_array[cur_depth--]);
234 min_depth = MAXPATHLEN;
240 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
243 maybe_send_keepalive();
245 if (file->dir.depth >= MAXPATHLEN/2+1)
246 return; /* Impossible... */
248 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
252 "IO error encountered -- skipping file deletion\n");
257 while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
258 pop_local_filters(filt_array[cur_depth--]);
259 cur_depth = file->dir.depth;
260 if (min_depth > cur_depth)
261 min_depth = cur_depth;
263 filt_array[cur_depth] = push_local_filters(fbuf, dlen);
265 if (one_file_system) {
266 if (file->flags & FLAG_TOP_DIR)
267 filesystem_dev = stp->st_dev;
268 else if (filesystem_dev != stp->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 delete_item(delbuf, fp->mode, DEL_FORCE_RECURSE);
289 /* This deletes any files on the receiving side that are not present on the
290 * sending side. This is used by --delete-before and --delete-after. */
291 static void do_delete_pass(struct file_list *flist)
293 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))
308 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
309 rprintf(FINFO, "deleting in %s\n", fbuf);
311 if (link_stat(fbuf, &st, keep_dirlinks) < 0
312 || !S_ISDIR(st.st_mode))
315 delete_in_dir(flist, fbuf, file, &st);
317 delete_in_dir(NULL, NULL, NULL, NULL);
319 if (do_progress && !am_server)
320 rprintf(FINFO, " \r");
323 int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
326 && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
329 if (am_root && preserve_uid && st->st_uid != file->uid)
332 if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
338 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
339 int32 iflags, uchar fnamecmp_type, char *xname)
341 if (statret >= 0) { /* A from-dest-dir statret can == 1! */
342 int keep_time = !preserve_times ? 0
343 : S_ISDIR(file->mode) ? !omit_dir_times
344 : !S_ISLNK(file->mode);
346 if (S_ISREG(file->mode) && file->length != st->st_size)
347 iflags |= ITEM_REPORT_SIZE;
348 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
349 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
350 || (keep_time && cmp_modtime(file->modtime, st->st_mtime) != 0))
351 iflags |= ITEM_REPORT_TIME;
353 && (file->mode & CHMOD_BITS) != (st->st_mode & CHMOD_BITS))
354 iflags |= ITEM_REPORT_PERMS;
355 if (preserve_uid && am_root && file->uid != st->st_uid)
356 iflags |= ITEM_REPORT_OWNER;
357 if (preserve_gid && file->gid != GID_NONE
358 && st->st_gid != file->gid)
359 iflags |= ITEM_REPORT_GROUP;
361 iflags |= ITEM_IS_NEW;
364 if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
365 || log_format_has_i > 1 || (xname && *xname)) && !read_batch) {
366 if (protocol_version >= 29) {
368 write_int(sock_f_out, ndx);
369 write_shortint(sock_f_out, iflags);
370 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
371 write_byte(sock_f_out, fnamecmp_type);
372 if (iflags & ITEM_XNAME_FOLLOWS)
373 write_vstring(sock_f_out, xname, strlen(xname));
375 log_item(file, &stats, iflags, xname);
380 /* Perform our quick-check heuristic for determining if a file is unchanged. */
381 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
383 if (st->st_size != file->length)
386 /* if always checksum is set then we use the checksum instead
387 of the file time to determine whether to sync */
388 if (always_checksum && S_ISREG(st->st_mode)) {
389 char sum[MD4_SUM_LENGTH];
390 file_checksum(fn, sum, st->st_size);
391 return memcmp(sum, file->u.sum, checksum_len) == 0;
400 return cmp_modtime(st->st_mtime, file->modtime) == 0;
405 * set (initialize) the size entries in the per-file sum_struct
406 * calculating dynamic block and checksum sizes.
408 * This is only called from generate_and_send_sums() but is a separate
409 * function to encapsulate the logic.
411 * The block size is a rounded square root of file length.
413 * The checksum size is determined according to:
414 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
415 * provided by Donovan Baarda which gives a probability of rsync
416 * algorithm corrupting data and falling back using the whole md4
419 * This might be made one of several selectable heuristics.
421 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
427 blength = block_size;
428 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
429 blength = BLOCK_SIZE;
434 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
435 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
436 blength = MAX_BLOCK_SIZE;
441 if (len < (int64)blength * blength)
444 } while (c >= 8); /* round to multiple of 8 */
445 blength = MAX(blength, BLOCK_SIZE);
449 if (protocol_version < 27) {
450 s2length = csum_length;
451 } else if (csum_length == SUM_LENGTH) {
452 s2length = SUM_LENGTH;
456 int b = BLOCKSUM_BIAS;
457 for (l = len; l >>= 1; b += 2) {}
458 for (c = blength; c >>= 1 && b; b--) {}
459 /* add a bit, subtract rollsum, round up. */
460 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
461 s2length = MAX(s2length, csum_length);
462 s2length = MIN(s2length, SUM_LENGTH);
466 sum->blength = blength;
467 sum->s2length = s2length;
468 sum->remainder = len % blength;
469 sum->count = len / blength + (sum->remainder != 0);
471 if (sum->count && verbose > 2) {
473 "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
474 (double)sum->count, (long)sum->remainder, (long)sum->blength,
475 sum->s2length, (double)sum->flength);
481 * Generate and send a stream of signatures/checksums that describe a buffer
483 * Generate approximately one checksum every block_len bytes.
485 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
488 struct map_struct *mapbuf;
489 struct sum_struct sum;
492 sum_sizes_sqroot(&sum, len);
493 write_sum_head(f_out, &sum);
495 if (append_mode > 0 && f_copy < 0)
499 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
503 for (i = 0; i < sum.count; i++) {
504 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
505 char *map = map_ptr(mapbuf, offset, n1);
506 char sum2[SUM_LENGTH];
513 full_write(f_copy, map, n1);
518 sum1 = get_checksum1(map, n1);
519 get_checksum2(map, n1, sum2);
523 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
524 (double)i, (double)offset - n1, (long)n1,
525 (unsigned long)sum1);
527 write_int(f_out, sum1);
528 write_buf(f_out, sum2, sum.s2length);
536 /* Try to find a filename in the same dir as "fname" with a similar name. */
537 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
539 int fname_len, fname_suf_len;
540 const char *fname_suf, *fname = file->basename;
541 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
542 int j, lowest_j = -1;
544 fname_len = strlen(fname);
545 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
547 for (j = 0; j < dirlist->count; j++) {
548 struct file_struct *fp = dirlist->files[j];
549 const char *suf, *name;
553 if (!S_ISREG(fp->mode) || !fp->length
554 || fp->flags & FLAG_NO_FUZZY)
559 if (fp->length == file->length
560 && cmp_modtime(fp->modtime, file->modtime) == 0) {
563 "fuzzy size/modtime match for %s\n",
570 suf = find_filename_suffix(name, len, &suf_len);
572 dist = fuzzy_distance(name, len, fname, fname_len);
573 /* Add some extra weight to how well the suffixes match. */
574 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
577 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
578 name, (int)(dist>>16), (int)(dist&0xFFFF));
580 if (dist <= lowest_dist) {
589 void check_for_finished_hlinks(int itemizing, enum logcode code)
591 struct file_struct *file;
594 while ((ndx = get_hlink_num()) != -1) {
595 if (ndx < 0 || ndx >= the_file_list->count)
598 file = the_file_list->files[ndx];
599 if (!file->link_u.links)
602 hard_link_cluster(file, ndx, itemizing, code);
606 /* This is only called for regular files. We return -2 if we've finished
607 * handling the file, -1 if no dest-linking occurred, or a non-negative
608 * value if we found an alternate basis file. */
609 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
610 char *cmpbuf, STRUCT_STAT *stp, int itemizing,
611 int maybe_ATTRS_REPORT, enum logcode code)
618 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
619 if (link_stat(cmpbuf, stp, 0) < 0 || !S_ISREG(stp->st_mode))
621 switch (match_level) {
627 if (!unchanged_file(cmpbuf, file, stp))
633 if (!unchanged_attrs(file, stp))
635 if ((always_checksum || ignore_times)
636 && cmp_modtime(stp->st_mtime, file->modtime))
643 } while (basis_dir[++j] != NULL);
648 if (j != best_match) {
650 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
651 if (link_stat(cmpbuf, stp, 0) < 0)
656 if (match_level == 3 && !copy_dest) {
658 if (hard_link_one(file, ndx, fname, 0, stp,
660 itemizing && verbose > 1,
663 if (preserve_hard_links && file->link_u.links)
664 hard_link_cluster(file, ndx, itemizing, code);
665 } else if (itemizing)
666 itemize(file, ndx, 0, stp, 0, 0, NULL);
667 if (verbose > 1 && maybe_ATTRS_REPORT) {
668 code = daemon_log_format_has_i || dry_run
670 rprintf(code, "%s is uptodate\n", fname);
676 if (match_level >= 2) {
677 try_a_copy: /* Copy the file locally. */
678 if (copy_file(cmpbuf, fname, file->mode) < 0) {
680 rsyserr(FINFO, errno, "copy_file %s => %s",
681 full_fname(cmpbuf), fname);
686 itemize(file, ndx, 0, stp, ITEM_LOCAL_CHANGE, 0, NULL);
687 set_file_attrs(fname, file, NULL, 0);
688 if (maybe_ATTRS_REPORT
689 && ((!itemizing && verbose && match_level == 2)
690 || (verbose > 1 && match_level == 3))) {
691 code = daemon_log_format_has_i || dry_run
693 rprintf(code, "%s%s\n", fname,
694 match_level == 3 ? " is uptodate" : "");
696 if (preserve_hard_links && file->link_u.links)
697 hard_link_cluster(file, ndx, itemizing, code);
701 return FNAMECMP_BASIS_DIR_LOW + j;
704 /* This is only called for non-regular files. We return -2 if we've finished
705 * handling the file, or -1 if no dest-linking occurred. */
706 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
707 int itemizing, int *possible_ptr,
708 int maybe_ATTRS_REPORT, enum logcode code)
710 char fnamebuf[MAXPATHLEN], lnk[MAXPATHLEN];
715 pathjoin(fnamebuf, MAXPATHLEN, basis_dir[i], fname);
716 if (link_stat(fnamebuf, &st, 0) < 0 || S_ISDIR(st.st_mode)
717 || !unchanged_attrs(file, &st))
719 if (S_ISLNK(file->mode)) {
721 if ((len = readlink(fnamebuf, lnk, MAXPATHLEN-1)) <= 0)
724 if (strcmp(lnk, file->u.link) != 0)
728 if (!IS_DEVICE(st.st_mode) || st.st_rdev != file->u.rdev)
732 if (do_link(fnamebuf, fname) < 0) {
733 /* TODO improve this to be based on errno? */
737 if (preserve_hard_links && file->link_u.links)
738 hard_link_cluster(file, ndx, itemizing, code);
740 if (itemizing && log_format_has_i && verbose > 1) {
741 int changes = compare_dest ? 0 : ITEM_LOCAL_CHANGE
742 + (link_dest ? ITEM_XNAME_FOLLOWS : 0);
743 char *lp = link_dest ? "" : NULL;
744 itemize(file, ndx, 0, &st, changes, 0, lp);
746 if (verbose > 1 && maybe_ATTRS_REPORT) {
747 code = daemon_log_format_has_i || dry_run
749 rprintf(code, "%s is uptodate\n", fname);
752 } while (basis_dir[++i] != NULL);
757 static int phase = 0;
759 /* Acts on the_file_list->file's ndx'th item, whose name is fname. If a dir,
760 * make sure it exists, and has the right permissions/timestamp info. For
761 * all other non-regular files (symlinks, etc.) we create them here. For
762 * regular files that have changed, we try to find a basis file and then
763 * start sending checksums.
765 * When fname is non-null, it must point to a MAXPATHLEN buffer!
767 * Note that f_out is set to -1 when doing final directory-permission and
768 * modification-time repair. */
769 static void recv_generator(char *fname, struct file_struct *file, int ndx,
770 int itemizing, int maybe_ATTRS_REPORT,
771 enum logcode code, int f_out)
773 static int missing_below = -1, excluded_below = -1;
774 static char *fuzzy_dirname = "";
775 static struct file_list *fuzzy_dirlist = NULL;
776 struct file_struct *fuzzy_file = NULL;
777 int fd = -1, f_copy = -1;
778 STRUCT_STAT st, real_st, partial_st;
779 struct file_struct *back_file = NULL;
780 int statret, real_ret, stat_errno;
781 char *fnamecmp, *partialptr, *backupptr = NULL;
782 char fnamecmpbuf[MAXPATHLEN];
784 int del_opts = DEL_TERSE | (delete_mode ? DEL_FORCE_RECURSE : 0);
791 flist_free(fuzzy_dirlist);
792 fuzzy_dirlist = NULL;
795 if (missing_below >= 0) {
803 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
805 if (server_filter_list.head) {
806 if (excluded_below >= 0) {
807 if (file->dir.depth > excluded_below)
811 if (check_filter(&server_filter_list, fname,
812 S_ISDIR(file->mode)) < 0) {
813 if (S_ISDIR(file->mode))
814 excluded_below = file->dir.depth;
818 "skipping server-excluded file \"%s\"\n",
825 if (missing_below >= 0 && file->dir.depth <= missing_below) {
833 if (fuzzy_basis && S_ISREG(file->mode)) {
834 char *dn = file->dirname ? file->dirname : ".";
835 if (fuzzy_dirname != dn
836 && strcmp(fuzzy_dirname, dn) != 0) {
838 flist_free(fuzzy_dirlist);
839 fuzzy_dirlist = get_dirlist(dn, -1, 1);
844 statret = link_stat(fname, &st,
845 keep_dirlinks && S_ISDIR(file->mode));
849 if (ignore_non_existing && statret == -1 && stat_errno == ENOENT) {
851 rprintf(FINFO, "not creating new %s \"%s\"\n",
852 S_ISDIR(file->mode) ? "directory" : "file",
858 if (statret == 0 && !preserve_perms
859 && S_ISDIR(st.st_mode) == S_ISDIR(file->mode)) {
860 /* if the file exists already and we aren't perserving
861 * permissions then act as though the remote end sent
862 * us the file permissions we already have */
863 file->mode = (file->mode & ~CHMOD_BITS)
864 | (st.st_mode & CHMOD_BITS);
867 if (S_ISDIR(file->mode)) {
868 /* The file to be received is a directory, so we need
869 * to prepare appropriately. If there is already a
870 * file of that name and it is *not* a directory, then
871 * we need to delete it. If it doesn't exist, then
872 * (perhaps recursively) create it. */
873 if (statret == 0 && !S_ISDIR(st.st_mode)) {
874 if (delete_item(fname, st.st_mode, del_opts) < 0)
878 if (dry_run && statret != 0 && missing_below < 0) {
879 missing_below = file->dir.depth;
882 if (itemizing && f_out != -1) {
883 itemize(file, ndx, statret, &st,
884 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
886 if (statret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
887 if (!relative_paths || errno != ENOENT
888 || create_directory_path(fname, orig_umask) < 0
889 || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
890 rsyserr(FERROR, errno,
891 "recv_generator: mkdir %s failed",
895 if (set_file_attrs(fname, file, statret ? NULL : &st, 0)
896 && verbose && code && f_out != -1)
897 rprintf(code, "%s/\n", fname);
898 if (delete_during && f_out != -1 && !phase && dry_run < 2
899 && (file->flags & FLAG_DEL_HERE))
900 delete_in_dir(the_file_list, fname, file, &st);
904 if (preserve_hard_links && file->link_u.links
905 && hard_link_check(file, ndx, fname, statret, &st,
906 itemizing, code, HL_CHECK_MASTER))
909 if (preserve_links && S_ISLNK(file->mode)) {
911 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
913 if (the_file_list->count == 1)
914 fname = f_name(file, NULL);
916 "ignoring unsafe symlink %s -> \"%s\"\n",
917 full_fname(fname), file->u.link);
922 char lnk[MAXPATHLEN];
925 if (!S_ISDIR(st.st_mode)
926 && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
928 /* A link already pointing to the
929 * right place -- no further action
931 if (strcmp(lnk, file->u.link) == 0) {
933 itemize(file, ndx, 0, &st, 0,
936 set_file_attrs(fname, file, &st,
938 if (preserve_hard_links
939 && file->link_u.links) {
940 hard_link_cluster(file, ndx,
947 /* Not the right symlink (or not a symlink), so
949 if (delete_item(fname, st.st_mode, del_opts) < 0)
951 if (!S_ISLNK(st.st_mode))
953 } else if (basis_dir[0] != NULL && can_link_symlinks) {
954 if (try_dests_non(file, fname, ndx, itemizing,
956 maybe_ATTRS_REPORT, code) == -2) {
959 itemizing = code = 0;
962 if (preserve_hard_links && file->link_u.links
963 && hard_link_check(file, ndx, fname, -1, &st,
964 itemizing, code, HL_SKIP))
966 if (do_symlink(file->u.link,fname) != 0) {
967 rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
968 full_fname(fname), file->u.link);
970 set_file_attrs(fname, file, NULL, 0);
972 itemize(file, ndx, statret, &st,
973 ITEM_LOCAL_CHANGE, 0, NULL);
975 if (code && verbose) {
976 rprintf(code, "%s -> %s\n", fname,
979 if (remove_sent_files && !dry_run) {
981 SIVAL(numbuf, 0, ndx);
982 send_msg(MSG_SUCCESS, numbuf, 4);
984 if (preserve_hard_links && file->link_u.links)
985 hard_link_cluster(file, ndx, itemizing, code);
991 if ((am_root && preserve_devices && IS_DEVICE(file->mode))
992 || (preserve_specials && IS_SPECIAL(file->mode))) {
994 && (basis_dir[0] != NULL && can_link_devices)) {
995 if (try_dests_non(file, fname, ndx, itemizing,
997 maybe_ATTRS_REPORT, code) == -2) {
1000 itemizing = code = 0;
1004 || (st.st_mode & ~CHMOD_BITS) != (file->mode & ~CHMOD_BITS)
1005 || st.st_rdev != file->u.rdev) {
1007 && delete_item(fname, st.st_mode, del_opts) < 0)
1009 if (preserve_hard_links && file->link_u.links
1010 && hard_link_check(file, ndx, fname, -1, &st,
1011 itemizing, code, HL_SKIP))
1013 if ((IS_DEVICE(file->mode) && !IS_DEVICE(st.st_mode))
1014 || (IS_SPECIAL(file->mode) && !IS_SPECIAL(st.st_mode)))
1017 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
1019 (int)file->mode, (int)file->u.rdev);
1021 if (do_mknod(fname,file->mode,file->u.rdev) < 0) {
1022 rsyserr(FERROR, errno, "mknod %s failed",
1025 set_file_attrs(fname, file, NULL, 0);
1027 itemize(file, ndx, statret, &st,
1028 ITEM_LOCAL_CHANGE, 0, NULL);
1030 if (code && verbose)
1031 rprintf(code, "%s\n", fname);
1032 if (preserve_hard_links && file->link_u.links) {
1033 hard_link_cluster(file, ndx,
1039 itemize(file, ndx, statret, &st, 0, 0, NULL);
1040 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1041 if (preserve_hard_links && file->link_u.links)
1042 hard_link_cluster(file, ndx, itemizing, code);
1047 if (!S_ISREG(file->mode)) {
1048 if (the_file_list->count == 1)
1049 fname = f_name(file, NULL);
1050 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1054 if (max_size && file->length > max_size) {
1056 if (the_file_list->count == 1)
1057 fname = f_name(file, NULL);
1058 rprintf(FINFO, "%s is over max-size\n", fname);
1062 if (min_size && file->length < min_size) {
1064 if (the_file_list->count == 1)
1065 fname = f_name(file, NULL);
1066 rprintf(FINFO, "%s is under min-size\n", fname);
1071 if (ignore_existing && statret == 0) {
1073 rprintf(FINFO, "%s exists\n", fname);
1077 if (update_only && statret == 0
1078 && cmp_modtime(st.st_mtime, file->modtime) > 0) {
1080 rprintf(FINFO, "%s is newer\n", fname);
1085 fnamecmp_type = FNAMECMP_FNAME;
1087 if (statret == 0 && !S_ISREG(st.st_mode)) {
1088 if (delete_item(fname, st.st_mode, del_opts) != 0)
1091 stat_errno = ENOENT;
1094 if (statret != 0 && basis_dir[0] != NULL) {
1095 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &st,
1096 itemizing, maybe_ATTRS_REPORT, code);
1100 fnamecmp = fnamecmpbuf;
1109 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1110 && link_stat(partialptr, &partial_st, 0) == 0
1111 && S_ISREG(partial_st.st_mode)) {
1113 goto prepare_to_open;
1117 if (statret != 0 && fuzzy_basis && dry_run <= 1) {
1118 int j = find_fuzzy(file, fuzzy_dirlist);
1120 fuzzy_file = fuzzy_dirlist->files[j];
1121 f_name(fuzzy_file, fnamecmpbuf);
1123 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1124 fname, fnamecmpbuf);
1126 st.st_size = fuzzy_file->length;
1128 fnamecmp = fnamecmpbuf;
1129 fnamecmp_type = FNAMECMP_FUZZY;
1134 if (preserve_hard_links && file->link_u.links
1135 && hard_link_check(file, ndx, fname, statret, &st,
1136 itemizing, code, HL_SKIP))
1138 if (stat_errno == ENOENT)
1140 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1145 if (append_mode && st.st_size > file->length)
1148 if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1150 else if (fnamecmp_type == FNAMECMP_FUZZY)
1152 else if (unchanged_file(fnamecmp, file, &st)) {
1154 do_unlink(partialptr);
1155 handle_partial_dir(partialptr, PDIR_DELETE);
1158 itemize(file, ndx, real_ret, &real_st,
1161 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1162 if (preserve_hard_links && file->link_u.links)
1163 hard_link_cluster(file, ndx, itemizing, code);
1170 fnamecmp = partialptr;
1171 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1175 if (!do_xfers || read_batch || whole_file)
1179 int j = flist_find(fuzzy_dirlist, file);
1180 if (j >= 0) /* don't use changing file as future fuzzy basis */
1181 fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1185 fd = do_open(fnamecmp, O_RDONLY, 0);
1188 rsyserr(FERROR, errno, "failed to open %s, continuing",
1189 full_fname(fnamecmp));
1191 /* pretend the file didn't exist */
1192 if (preserve_hard_links && file->link_u.links
1193 && hard_link_check(file, ndx, fname, statret, &st,
1194 itemizing, code, HL_SKIP))
1196 statret = real_ret = -1;
1200 if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1201 if (!(backupptr = get_backup_name(fname))) {
1205 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1207 goto pretend_missing;
1209 if (robust_unlink(backupptr) && errno != ENOENT) {
1210 rsyserr(FERROR, errno, "unlink %s",
1211 full_fname(backupptr));
1216 if ((f_copy = do_open(backupptr,
1217 O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1218 rsyserr(FERROR, errno, "open %s",
1219 full_fname(backupptr));
1224 fnamecmp_type = FNAMECMP_BACKUP;
1228 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1229 fnamecmp, (double)st.st_size);
1233 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1236 write_int(f_out, ndx);
1238 int iflags = ITEM_TRANSFER;
1239 if (always_checksum)
1240 iflags |= ITEM_REPORT_CHECKSUM;
1241 if (fnamecmp_type != FNAMECMP_FNAME)
1242 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1243 if (fnamecmp_type == FNAMECMP_FUZZY)
1244 iflags |= ITEM_XNAME_FOLLOWS;
1245 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1246 fuzzy_file ? fuzzy_file->basename : NULL);
1250 if (preserve_hard_links && file->link_u.links)
1251 hard_link_cluster(file, ndx, itemizing, code);
1257 if (statret != 0 || whole_file) {
1258 write_sum_head(f_out, NULL);
1262 generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1266 set_file_attrs(backupptr, back_file, NULL, 0);
1268 rprintf(FINFO, "backed up %s to %s\n",
1277 void generate_files(int f_out, struct file_list *flist, char *local_name)
1280 char fbuf[MAXPATHLEN];
1281 int itemizing, maybe_ATTRS_REPORT;
1283 int lull_mod = allowed_lull * 5;
1284 int need_retouch_dir_times = preserve_times && !omit_dir_times;
1285 int need_retouch_dir_perms = 0;
1286 int save_ignore_existing = ignore_existing;
1287 int save_ignore_non_existing = ignore_non_existing;
1288 int save_do_progress = do_progress;
1289 int save_make_backups = make_backups;
1291 if (protocol_version >= 29) {
1293 maybe_ATTRS_REPORT = log_format_has_i ? 0 : ATTRS_REPORT;
1294 code = daemon_log_format_has_i ? 0 : FLOG;
1295 } else if (am_daemon) {
1296 itemizing = daemon_log_format_has_i && do_xfers;
1297 maybe_ATTRS_REPORT = ATTRS_REPORT;
1298 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1299 } else if (!am_server) {
1300 itemizing = log_format_has_i;
1301 maybe_ATTRS_REPORT = log_format_has_i ? 0 : ATTRS_REPORT;
1302 code = itemizing ? 0 : FINFO;
1305 maybe_ATTRS_REPORT = ATTRS_REPORT;
1310 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1311 (long)getpid(), flist->count);
1314 if (delete_before && !local_name && flist->count > 0)
1315 do_delete_pass(flist);
1318 if (append_mode || whole_file < 0)
1321 rprintf(FINFO, "delta-transmission %s\n",
1323 ? "disabled for local transfer or --whole-file"
1327 /* Since we often fill up the outgoing socket and then just sit around
1328 * waiting for the other 2 processes to do their thing, we don't want
1329 * to exit on a timeout. If the data stops flowing, the receiver will
1330 * notice that and let us know via the redo pipe (or its closing). */
1333 for (i = 0; i < flist->count; i++) {
1334 struct file_struct *file = flist->files[i];
1336 if (!file->basename)
1340 strlcpy(fbuf, local_name, sizeof fbuf);
1343 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1346 /* We need to ensure that any dirs we create have writeable
1347 * permissions during the time we are putting files within
1348 * them. This is then fixed after the transfer is done. */
1350 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1352 mode_t mode = file->mode | S_IWUSR; /* user write */
1353 char *fname = local_name ? local_name : fbuf;
1354 if (do_chmod(fname, mode) < 0) {
1355 rsyserr(FERROR, errno,
1356 "failed to modify permissions on %s",
1359 need_retouch_dir_perms = 1;
1363 if (preserve_hard_links)
1364 check_for_finished_hlinks(itemizing, code);
1366 if (allowed_lull && !(i % lull_mod))
1367 maybe_send_keepalive();
1368 else if (!(i % 200))
1369 maybe_flush_socket();
1371 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1373 delete_in_dir(NULL, NULL, NULL, NULL);
1376 csum_length = SUM_LENGTH;
1377 max_size = min_size = ignore_existing = ignore_non_existing = 0;
1378 update_only = always_checksum = size_only = 0;
1380 if (append_mode) /* resend w/o append mode */
1381 append_mode = -1; /* ... but only longer files */
1382 make_backups = 0; /* avoid a duplicate backup for inplace processing */
1385 rprintf(FINFO,"generate_files phase=%d\n",phase);
1387 write_int(f_out, -1);
1389 /* files can cycle through the system more than once
1390 * to catch initial checksum errors */
1391 while ((i = get_redo_num(itemizing, code)) != -1) {
1392 struct file_struct *file = flist->files[i];
1394 strlcpy(fbuf, local_name, sizeof fbuf);
1397 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1402 ignore_non_existing = save_ignore_non_existing;
1403 ignore_existing = save_ignore_existing;
1404 make_backups = save_make_backups;
1407 rprintf(FINFO,"generate_files phase=%d\n",phase);
1409 write_int(f_out, -1);
1410 /* Reduce round-trip lag-time for a useless delay-updates phase. */
1411 if (protocol_version >= 29 && !delay_updates)
1412 write_int(f_out, -1);
1414 /* Read MSG_DONE for the redo phase (and any prior messages). */
1415 get_redo_num(itemizing, code);
1417 if (protocol_version >= 29) {
1420 rprintf(FINFO, "generate_files phase=%d\n", phase);
1422 write_int(f_out, -1);
1423 /* Read MSG_DONE for delay-updates phase & prior messages. */
1424 get_redo_num(itemizing, code);
1427 do_progress = save_do_progress;
1428 if (delete_after && !local_name && flist->count > 0)
1429 do_delete_pass(flist);
1431 if ((need_retouch_dir_perms || need_retouch_dir_times)
1432 && !list_only && !local_name && !dry_run) {
1434 /* Now we need to fix any directory permissions that were
1435 * modified during the transfer and/or re-set any tweaked
1436 * modified-time values. */
1437 for (i = 0; i < flist->count; i++) {
1438 struct file_struct *file = flist->files[i];
1440 if (!file->basename || !S_ISDIR(file->mode))
1442 if (!need_retouch_dir_times && file->mode & S_IWUSR)
1444 recv_generator(f_name(file, NULL), file, i, itemizing,
1445 maybe_ATTRS_REPORT, code, -1);
1446 if (allowed_lull && !(++j % lull_mod))
1447 maybe_send_keepalive();
1448 else if (!(j % 200))
1449 maybe_flush_socket();
1452 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1454 if (max_delete > 0 && deletion_count > max_delete) {
1456 "Deletions stopped due to --max-delete limit (%d skipped)\n",
1457 deletion_count - max_delete);
1458 io_error |= IOERR_DEL_LIMIT;
1462 rprintf(FINFO,"generate_files finished\n");