2 * Routines that are exclusive to the generator process.
4 * Copyright (C) 1996-2000 Andrew Tridgell
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2002 Martin Pool <mbp@samba.org>
7 * Copyright (C) 2003, 2004, 2005, 2006 Wayne Davison
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 along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
29 extern int stdout_format_has_i;
30 extern int logfile_format_has_i;
34 extern int do_progress;
35 extern int relative_paths;
36 extern int implied_dirs;
37 extern int keep_dirlinks;
38 extern int preserve_links;
39 extern int preserve_devices;
40 extern int preserve_specials;
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_mode;
48 extern int delete_before;
49 extern int delete_during;
50 extern int delete_after;
52 extern int ignore_errors;
53 extern int remove_source_files;
54 extern int delay_updates;
55 extern int update_only;
56 extern int ignore_existing;
57 extern int ignore_non_existing;
59 extern int append_mode;
60 extern int make_backups;
61 extern int csum_length;
62 extern int ignore_times;
64 extern OFF_T max_size;
65 extern OFF_T min_size;
67 extern int allowed_lull;
68 extern int sock_f_out;
69 extern int ignore_timeout;
70 extern int protocol_version;
71 extern int fuzzy_basis;
72 extern int always_checksum;
73 extern int checksum_len;
74 extern char *partial_dir;
75 extern char *basis_dir[];
76 extern int compare_dest;
79 extern int whole_file;
81 extern int new_root_dir;
82 extern int read_batch;
83 extern int safe_symlinks;
84 extern long block_size; /* "long" because popt can't set an int32. */
85 extern int max_delete;
86 extern int force_delete;
87 extern int one_file_system;
88 extern struct stats stats;
89 extern dev_t filesystem_dev;
90 extern char *backup_dir;
91 extern char *backup_suffix;
92 extern int backup_suffix_len;
93 extern struct file_list *the_file_list;
94 extern struct filter_list_struct server_filter_list;
96 int ignore_perishable = 0;
97 int non_perishable_cnt = 0;
99 static int deletion_count = 0; /* used to implement --max-delete */
101 /* For calling delete_item() and delete_dir_contents(). */
102 #define DEL_RECURSE (1<<1) /* recurse */
103 #define DEL_DIR_IS_EMPTY (1<<2) /* internal delete_FUNCTIONS use only */
106 TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
110 DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
113 /* Forward declaration for delete_item(). */
114 static enum delret delete_dir_contents(char *fname, int flags);
117 static int is_backup_file(char *fn)
119 int k = strlen(fn) - backup_suffix_len;
120 return k > 0 && strcmp(fn+k, backup_suffix) == 0;
123 /* Delete a file or directory. If DEL_RECURSE is set in the flags, this will
124 * delete recursively.
126 * Note that fname must point to a MAXPATHLEN buffer if the mode indicates it's
127 * a directory! (The buffer is used for recursion, but returned unchanged.)
129 static enum delret delete_item(char *fname, int mode, char *replace, int flags)
136 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
140 if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
141 ignore_perishable = 1;
142 /* If DEL_RECURSE is not set, this just reports emptiness. */
143 ret = delete_dir_contents(fname, flags);
144 ignore_perishable = 0;
145 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
147 /* OK: try to delete the directory. */
150 if (!replace && max_delete >= 0 && ++deletion_count > max_delete)
155 ok = do_rmdir(fname) == 0;
156 } else if (make_backups && (backup_dir || !is_backup_file(fname))) {
157 what = "make_backup";
158 ok = make_backup(fname);
161 ok = robust_unlink(fname) == 0;
166 log_delete(fname, mode);
169 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
170 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
173 } else if (errno != ENOENT) {
174 rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
175 what, full_fname(fname));
184 if (replace && ret != DR_SUCCESS) {
185 rprintf(FERROR, "could not make way for new %s: %s\n",
191 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
192 * its contents, otherwise just checks for content. Returns DR_SUCCESS or
193 * DR_NOT_EMPTY. Note that fname must point to a MAXPATHLEN buffer! (The
194 * buffer is used for recursion, but returned unchanged.)
196 static enum delret delete_dir_contents(char *fname, int flags)
198 struct file_list *dirlist;
206 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
210 dlen = strlen(fname);
211 save_filters = push_local_filters(fname, dlen);
213 non_perishable_cnt = 0;
214 dirlist = get_dirlist(fname, dlen, 0);
215 ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
220 if (!(flags & DEL_RECURSE)) {
226 if (dlen != 1 || *fname != '/')
228 remainder = MAXPATHLEN - (p - fname);
230 /* We do our own recursion, so make delete_item() non-recursive. */
231 flags = (flags & ~DEL_RECURSE) | DEL_DIR_IS_EMPTY;
233 for (j = dirlist->count; j--; ) {
234 struct file_struct *fp = dirlist->files[j];
236 if (fp->flags & FLAG_MOUNT_POINT) {
239 "mount point, %s, pins parent directory\n",
246 strlcpy(p, fp->basename, remainder);
247 /* Save stack by recursing to ourself directly. */
248 if (S_ISDIR(fp->mode)
249 && delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
251 if (delete_item(fname, fp->mode, NULL, flags) != DR_SUCCESS)
259 pop_local_filters(save_filters);
261 if (ret == DR_NOT_EMPTY) {
262 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
269 /* This function is used to implement per-directory deletion, and is used by
270 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
271 * MAXPATHLEN buffer with the name of the directory in it (the functions we
272 * call will append names onto the end, but the old dir value will be restored
274 static void delete_in_dir(struct file_list *flist, char *fbuf,
275 struct file_struct *file, STRUCT_STAT *stp)
277 static int min_depth = MAXPATHLEN, cur_depth = -1;
278 static void *filt_array[MAXPATHLEN/2+1];
279 static int already_warned = 0;
280 struct file_list *dirlist;
281 char delbuf[MAXPATHLEN];
285 while (cur_depth >= min_depth)
286 pop_local_filters(filt_array[cur_depth--]);
287 min_depth = MAXPATHLEN;
293 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
296 maybe_send_keepalive();
298 if (file->dir.depth >= MAXPATHLEN/2+1)
299 return; /* Impossible... */
301 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
305 "IO error encountered -- skipping file deletion\n");
310 while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
311 pop_local_filters(filt_array[cur_depth--]);
312 cur_depth = file->dir.depth;
313 if (min_depth > cur_depth)
314 min_depth = cur_depth;
316 filt_array[cur_depth] = push_local_filters(fbuf, dlen);
318 if (one_file_system) {
319 if (file->flags & FLAG_TOP_DIR)
320 filesystem_dev = stp->st_dev;
321 else if (filesystem_dev != stp->st_dev)
325 dirlist = get_dirlist(fbuf, dlen, 0);
327 /* If an item in dirlist is not found in flist, delete it
328 * from the filesystem. */
329 for (i = dirlist->count; i--; ) {
330 struct file_struct *fp = dirlist->files[i];
333 if (fp->flags & FLAG_MOUNT_POINT) {
335 rprintf(FINFO, "cannot delete mount point: %s\n",
339 if (flist_find(flist, fp) < 0) {
341 delete_item(delbuf, fp->mode, NULL, DEL_RECURSE);
348 /* This deletes any files on the receiving side that are not present on the
349 * sending side. This is used by --delete-before and --delete-after. */
350 static void do_delete_pass(struct file_list *flist)
352 char fbuf[MAXPATHLEN];
356 /* dry_run is incremented when the destination doesn't exist yet. */
357 if (dry_run > 1 || list_only)
360 for (j = 0; j < flist->count; j++) {
361 struct file_struct *file = flist->files[j];
363 if (!(file->flags & FLAG_DEL_HERE))
367 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
368 rprintf(FINFO, "deleting in %s\n", fbuf);
370 if (link_stat(fbuf, &st, keep_dirlinks) < 0
371 || !S_ISDIR(st.st_mode))
374 delete_in_dir(flist, fbuf, file, &st);
376 delete_in_dir(NULL, NULL, NULL, NULL);
378 if (do_progress && !am_server)
379 rprintf(FINFO, " \r");
382 int unchanged_attrs(struct file_struct *file, STRUCT_STAT *st)
385 && (st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS))
388 if (am_root && preserve_uid && st->st_uid != file->uid)
391 if (preserve_gid && file->gid != GID_NONE && st->st_gid != file->gid)
397 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
398 int32 iflags, uchar fnamecmp_type, const char *xname)
400 if (statret >= 0) { /* A from-dest-dir statret can == 1! */
401 int keep_time = !preserve_times ? 0
402 : S_ISDIR(file->mode) ? !omit_dir_times
403 : !S_ISLNK(file->mode);
405 if (S_ISREG(file->mode) && file->length != st->st_size)
406 iflags |= ITEM_REPORT_SIZE;
407 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
408 && !(iflags & ITEM_MATCHED)
409 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
410 || (keep_time && cmp_time(file->modtime, st->st_mtime) != 0))
411 iflags |= ITEM_REPORT_TIME;
412 if ((file->mode & CHMOD_BITS) != (st->st_mode & CHMOD_BITS))
413 iflags |= ITEM_REPORT_PERMS;
414 if (preserve_uid && am_root && file->uid != st->st_uid)
415 iflags |= ITEM_REPORT_OWNER;
416 if (preserve_gid && file->gid != GID_NONE
417 && st->st_gid != file->gid)
418 iflags |= ITEM_REPORT_GROUP;
420 iflags |= ITEM_IS_NEW;
423 if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
424 || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
425 if (protocol_version >= 29) {
427 write_int(sock_f_out, ndx);
428 write_shortint(sock_f_out, iflags);
429 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
430 write_byte(sock_f_out, fnamecmp_type);
431 if (iflags & ITEM_XNAME_FOLLOWS)
432 write_vstring(sock_f_out, xname, strlen(xname));
433 } else if (ndx >= 0) {
434 enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
435 log_item(code, file, &stats, iflags, xname);
441 /* Perform our quick-check heuristic for determining if a file is unchanged. */
442 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
444 if (st->st_size != file->length)
447 /* if always checksum is set then we use the checksum instead
448 of the file time to determine whether to sync */
449 if (always_checksum && S_ISREG(st->st_mode)) {
450 char sum[MD4_SUM_LENGTH];
451 file_checksum(fn, sum, st->st_size);
452 return memcmp(sum, file->u.sum, checksum_len) == 0;
461 return cmp_time(st->st_mtime, file->modtime) == 0;
466 * set (initialize) the size entries in the per-file sum_struct
467 * calculating dynamic block and checksum sizes.
469 * This is only called from generate_and_send_sums() but is a separate
470 * function to encapsulate the logic.
472 * The block size is a rounded square root of file length.
474 * The checksum size is determined according to:
475 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
476 * provided by Donovan Baarda which gives a probability of rsync
477 * algorithm corrupting data and falling back using the whole md4
480 * This might be made one of several selectable heuristics.
482 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
488 blength = block_size;
489 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
490 blength = BLOCK_SIZE;
495 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
496 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
497 blength = MAX_BLOCK_SIZE;
502 if (len < (int64)blength * blength)
505 } while (c >= 8); /* round to multiple of 8 */
506 blength = MAX(blength, BLOCK_SIZE);
510 if (protocol_version < 27) {
511 s2length = csum_length;
512 } else if (csum_length == SUM_LENGTH) {
513 s2length = SUM_LENGTH;
517 int b = BLOCKSUM_BIAS;
518 for (l = len; l >>= 1; b += 2) {}
519 for (c = blength; (c >>= 1) && b; b--) {}
520 /* add a bit, subtract rollsum, round up. */
521 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
522 s2length = MAX(s2length, csum_length);
523 s2length = MIN(s2length, SUM_LENGTH);
527 sum->blength = blength;
528 sum->s2length = s2length;
529 sum->remainder = len % blength;
530 sum->count = len / blength + (sum->remainder != 0);
532 if (sum->count && verbose > 2) {
534 "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
535 (double)sum->count, (long)sum->remainder, (long)sum->blength,
536 sum->s2length, (double)sum->flength);
542 * Generate and send a stream of signatures/checksums that describe a buffer
544 * Generate approximately one checksum every block_len bytes.
546 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
549 struct map_struct *mapbuf;
550 struct sum_struct sum;
553 sum_sizes_sqroot(&sum, len);
554 write_sum_head(f_out, &sum);
556 if (append_mode > 0 && f_copy < 0)
560 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
564 for (i = 0; i < sum.count; i++) {
565 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
566 char *map = map_ptr(mapbuf, offset, n1);
567 char sum2[SUM_LENGTH];
574 full_write(f_copy, map, n1);
579 sum1 = get_checksum1(map, n1);
580 get_checksum2(map, n1, sum2);
584 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
585 (double)i, (double)offset - n1, (long)n1,
586 (unsigned long)sum1);
588 write_int(f_out, sum1);
589 write_buf(f_out, sum2, sum.s2length);
597 /* Try to find a filename in the same dir as "fname" with a similar name. */
598 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
600 int fname_len, fname_suf_len;
601 const char *fname_suf, *fname = file->basename;
602 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
603 int j, lowest_j = -1;
605 fname_len = strlen(fname);
606 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
608 for (j = 0; j < dirlist->count; j++) {
609 struct file_struct *fp = dirlist->files[j];
610 const char *suf, *name;
614 if (!S_ISREG(fp->mode) || !fp->length
615 || fp->flags & FLAG_NO_FUZZY)
620 if (fp->length == file->length
621 && cmp_time(fp->modtime, file->modtime) == 0) {
624 "fuzzy size/modtime match for %s\n",
631 suf = find_filename_suffix(name, len, &suf_len);
633 dist = fuzzy_distance(name, len, fname, fname_len);
634 /* Add some extra weight to how well the suffixes match. */
635 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
638 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
639 name, (int)(dist>>16), (int)(dist&0xFFFF));
641 if (dist <= lowest_dist) {
650 void check_for_finished_hlinks(int itemizing, enum logcode code)
652 struct file_struct *file;
655 while ((ndx = get_hlink_num()) != -1) {
656 if (ndx < 0 || ndx >= the_file_list->count)
659 file = the_file_list->files[ndx];
660 if (!file->link_u.links)
663 hard_link_cluster(file, ndx, itemizing, code);
667 /* This is only called for regular files. We return -2 if we've finished
668 * handling the file, -1 if no dest-linking occurred, or a non-negative
669 * value if we found an alternate basis file. */
670 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
671 char *cmpbuf, STRUCT_STAT *stp, int itemizing,
672 int maybe_ATTRS_REPORT, enum logcode code)
679 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
680 if (link_stat(cmpbuf, stp, 0) < 0 || !S_ISREG(stp->st_mode))
682 switch (match_level) {
688 if (!unchanged_file(cmpbuf, file, stp))
694 if (!unchanged_attrs(file, stp))
696 if (always_checksum && preserve_times
697 && cmp_time(stp->st_mtime, file->modtime))
704 } while (basis_dir[++j] != NULL);
709 if (j != best_match) {
711 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
712 if (link_stat(cmpbuf, stp, 0) < 0)
716 if (match_level == 3 && !copy_dest) {
717 #ifdef SUPPORT_HARD_LINKS
719 int i = itemizing && (verbose > 1 || stdout_format_has_i > 1);
720 if (hard_link_one(file, ndx, fname, 0, stp,
721 cmpbuf, 1, i, code) < 0)
723 if (preserve_hard_links && file->link_u.links) {
725 file->link_u.links->link_dest_used = j + 1;
726 hard_link_cluster(file, ndx, itemizing, code);
731 itemize(file, ndx, 0, stp, 0, 0, NULL);
732 if (verbose > 1 && maybe_ATTRS_REPORT) {
733 rprintf(FCLIENT, "%s is uptodate\n", fname);
738 if (match_level >= 2) {
739 try_a_copy: /* Copy the file locally. */
740 if (copy_file(cmpbuf, fname, file->mode) < 0) {
742 rsyserr(FINFO, errno, "copy_file %s => %s",
743 full_fname(cmpbuf), fname);
748 itemize(file, ndx, 0, stp, ITEM_LOCAL_CHANGE, 0, NULL);
749 set_file_attrs(fname, file, NULL, 0);
750 if (maybe_ATTRS_REPORT
751 && ((!itemizing && verbose && match_level == 2)
752 || (verbose > 1 && match_level == 3))) {
753 code = match_level == 3 ? FCLIENT : FINFO;
754 rprintf(code, "%s%s\n", fname,
755 match_level == 3 ? " is uptodate" : "");
757 if (preserve_hard_links && file->link_u.links)
758 hard_link_cluster(file, ndx, itemizing, code);
762 return FNAMECMP_BASIS_DIR_LOW + j;
765 /* This is only called for non-regular files. We return -2 if we've finished
766 * handling the file, or -1 if no dest-linking occurred, or a non-negative
767 * value if we found an alternate basis file. */
768 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
769 char *cmpbuf, STRUCT_STAT *stp, int itemizing,
770 int maybe_ATTRS_REPORT, enum logcode code)
772 char lnk[MAXPATHLEN];
775 enum nonregtype type;
778 #ifndef SUPPORT_LINKS
779 if (S_ISLNK(file->mode))
782 if (S_ISDIR(file->mode)) {
784 } else if (IS_SPECIAL(file->mode))
786 else if (IS_DEVICE(file->mode))
789 else if (S_ISLNK(file->mode))
794 "internal: try_dests_non() called with invalid mode (%o)\n",
796 exit_cleanup(RERR_UNSUPPORTED);
800 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
801 if (link_stat(cmpbuf, stp, 0) < 0)
805 if (!S_ISDIR(stp->st_mode))
809 if (!IS_SPECIAL(stp->st_mode))
813 if (!IS_DEVICE(stp->st_mode))
818 if (!S_ISLNK(stp->st_mode))
823 if (match_level < 1) {
832 if (stp->st_rdev != file->u.rdev)
837 if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
840 if (strcmp(lnk, file->u.link) != 0)
845 if (match_level < 2) {
849 if (unchanged_attrs(file, stp)) {
854 } while (basis_dir[++j] != NULL);
859 if (j != best_match) {
861 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
862 if (link_stat(cmpbuf, stp, 0) < 0)
866 if (match_level == 3) {
867 #ifdef SUPPORT_HARD_LINKS
869 #ifndef CAN_HARDLINK_SYMLINK
870 && !S_ISLNK(file->mode)
872 #ifndef CAN_HARDLINK_SPECIAL
873 && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
875 && !S_ISDIR(file->mode)) {
876 if (do_link(cmpbuf, fname) < 0) {
877 rsyserr(FERROR, errno,
878 "failed to hard-link %s with %s",
882 if (preserve_hard_links && file->link_u.links)
883 hard_link_cluster(file, ndx, itemizing, code);
887 if (itemizing && stdout_format_has_i
888 && (verbose > 1 || stdout_format_has_i > 1)) {
889 int chg = compare_dest && type != TYPE_DIR ? 0
891 + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
892 char *lp = match_level == 3 ? "" : NULL;
893 itemize(file, ndx, 0, stp, chg + ITEM_MATCHED, 0, lp);
895 if (verbose > 1 && maybe_ATTRS_REPORT) {
896 rprintf(FCLIENT, "%s%s is uptodate\n",
897 fname, type == TYPE_DIR ? "/" : "");
905 static int phase = 0;
907 /* Acts on the_file_list->file's ndx'th item, whose name is fname. If a dir,
908 * make sure it exists, and has the right permissions/timestamp info. For
909 * all other non-regular files (symlinks, etc.) we create them here. For
910 * regular files that have changed, we try to find a basis file and then
911 * start sending checksums.
913 * When fname is non-null, it must point to a MAXPATHLEN buffer!
915 * Note that f_out is set to -1 when doing final directory-permission and
916 * modification-time repair. */
917 static void recv_generator(char *fname, struct file_struct *file, int ndx,
918 int itemizing, int maybe_ATTRS_REPORT,
919 enum logcode code, int f_out)
921 static int missing_below = -1, excluded_below = -1;
922 static const char *parent_dirname = "";
923 static struct file_list *fuzzy_dirlist = NULL;
924 static int need_fuzzy_dirlist = 0;
925 struct file_struct *fuzzy_file = NULL;
926 int fd = -1, f_copy = -1;
927 STRUCT_STAT st, real_st, partial_st;
928 struct file_struct *back_file = NULL;
929 int statret, real_ret, stat_errno;
930 char *fnamecmp, *partialptr, *backupptr = NULL;
931 char fnamecmpbuf[MAXPATHLEN];
933 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
940 flist_free(fuzzy_dirlist);
941 fuzzy_dirlist = NULL;
943 if (missing_below >= 0) {
953 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
955 if (server_filter_list.head) {
956 if (excluded_below >= 0) {
957 if (file->dir.depth > excluded_below)
961 if (check_filter(&server_filter_list, fname,
962 S_ISDIR(file->mode)) < 0) {
963 if (S_ISDIR(file->mode))
964 excluded_below = file->dir.depth;
968 "skipping server-excluded file \"%s\"\n",
975 if (missing_below >= 0) {
976 if (file->dir.depth <= missing_below) {
987 const char *dn = file->dirname ? file->dirname : ".";
988 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
989 if (relative_paths && !implied_dirs
990 && do_stat(dn, &st) < 0
991 && create_directory_path(fname) < 0) {
992 rsyserr(FERROR, errno,
993 "recv_generator: mkdir %s failed",
997 flist_free(fuzzy_dirlist);
998 fuzzy_dirlist = NULL;
1001 need_fuzzy_dirlist = 1;
1003 parent_dirname = dn;
1005 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1006 strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1007 fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1008 need_fuzzy_dirlist = 0;
1011 statret = link_stat(fname, &st,
1012 keep_dirlinks && S_ISDIR(file->mode));
1016 if (ignore_non_existing && statret == -1 && stat_errno == ENOENT) {
1018 rprintf(FINFO, "not creating new %s \"%s\"\n",
1019 S_ISDIR(file->mode) ? "directory" : "file",
1025 /* If we're not preserving permissions, change the file-list's
1026 * mode based on the local permissions and some heuristics. */
1027 if (!preserve_perms) {
1028 int exists = statret == 0
1029 && S_ISDIR(st.st_mode) == S_ISDIR(file->mode);
1030 file->mode = dest_mode(file->mode, st.st_mode, exists);
1033 if (S_ISDIR(file->mode)) {
1034 /* The file to be received is a directory, so we need
1035 * to prepare appropriately. If there is already a
1036 * file of that name and it is *not* a directory, then
1037 * we need to delete it. If it doesn't exist, then
1038 * (perhaps recursively) create it. */
1039 if (statret == 0 && !S_ISDIR(st.st_mode)) {
1040 if (delete_item(fname, st.st_mode, "directory", del_opts) != 0)
1044 if (dry_run && statret != 0 && missing_below < 0) {
1045 missing_below = file->dir.depth;
1051 if (*fname == '.' && fname[1] == '\0')
1055 if (statret != 0 && basis_dir[0] != NULL) {
1056 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &st,
1057 itemizing, maybe_ATTRS_REPORT, code);
1064 if (itemizing && f_out != -1) {
1065 itemize(file, ndx, statret, &st,
1066 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1068 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1069 if (!relative_paths || errno != ENOENT
1070 || create_directory_path(fname) < 0
1071 || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1072 rsyserr(FERROR, errno,
1073 "recv_generator: mkdir %s failed",
1075 file->flags |= FLAG_MISSING;
1076 if (ndx+1 < the_file_list->count
1077 && the_file_list->files[ndx+1]->dir.depth > file->dir.depth) {
1079 "*** Skipping everything below this failed directory ***\n");
1080 missing_below = file->dir.depth;
1085 if (set_file_attrs(fname, file, real_ret ? NULL : &real_st, 0)
1086 && verbose && code != FNONE && f_out != -1)
1087 rprintf(code, "%s/\n", fname);
1088 if (real_ret != 0 && one_file_system)
1089 real_st.st_dev = filesystem_dev;
1090 if (delete_during && f_out != -1 && !phase && dry_run < 2
1091 && (file->flags & FLAG_DEL_HERE))
1092 delete_in_dir(the_file_list, fname, file, &real_st);
1096 if (preserve_hard_links && file->link_u.links
1097 && hard_link_check(file, ndx, fname, statret, &st,
1098 itemizing, code, HL_CHECK_MASTER))
1101 if (preserve_links && S_ISLNK(file->mode)) {
1102 #ifdef SUPPORT_LINKS
1103 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
1105 if (the_file_list->count == 1)
1106 fname = f_name(file, NULL);
1108 "ignoring unsafe symlink %s -> \"%s\"\n",
1109 full_fname(fname), file->u.link);
1114 char lnk[MAXPATHLEN];
1117 if (!S_ISLNK(st.st_mode))
1119 else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1120 && strncmp(lnk, file->u.link, len) == 0
1121 && file->u.link[len] == '\0') {
1122 /* The link is pointing to the right place. */
1124 itemize(file, ndx, 0, &st, 0, 0, NULL);
1125 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1126 if (preserve_hard_links && file->link_u.links)
1127 hard_link_cluster(file, ndx, itemizing, code);
1128 if (remove_source_files == 1)
1129 goto return_with_success;
1132 /* Not the right symlink (or not a symlink), so
1134 if (delete_item(fname, st.st_mode, "symlink", del_opts) != 0)
1136 } else if (basis_dir[0] != NULL) {
1137 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &st,
1138 itemizing, maybe_ATTRS_REPORT, code);
1140 #ifndef CAN_HARDLINK_SYMLINK
1142 /* Resort to --copy-dest behavior. */
1152 if (preserve_hard_links && file->link_u.links
1153 && hard_link_check(file, ndx, fname, -1, &st,
1154 itemizing, code, HL_SKIP))
1156 if (do_symlink(file->u.link, fname) != 0) {
1157 rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
1158 full_fname(fname), file->u.link);
1160 set_file_attrs(fname, file, NULL, 0);
1162 itemize(file, ndx, statret, &st,
1163 ITEM_LOCAL_CHANGE, 0, NULL);
1165 if (code != FNONE && verbose)
1166 rprintf(code, "%s -> %s\n", fname, file->u.link);
1167 if (preserve_hard_links && file->link_u.links)
1168 hard_link_cluster(file, ndx, itemizing, code);
1169 /* This does not check remove_source_files == 1
1170 * because this is one of the items that the old
1171 * --remove-sent-files option would remove. */
1172 if (remove_source_files)
1173 goto return_with_success;
1179 if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1180 || (preserve_specials && IS_SPECIAL(file->mode))) {
1183 if (IS_DEVICE(file->mode)) {
1184 if (!IS_DEVICE(st.st_mode))
1188 if (!IS_SPECIAL(st.st_mode))
1193 && (st.st_mode & ~CHMOD_BITS) == (file->mode & ~CHMOD_BITS)
1194 && st.st_rdev == file->u.rdev) {
1195 /* The device or special file is identical. */
1197 itemize(file, ndx, 0, &st, 0, 0, NULL);
1198 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1199 if (preserve_hard_links && file->link_u.links)
1200 hard_link_cluster(file, ndx, itemizing, code);
1201 if (remove_source_files == 1)
1202 goto return_with_success;
1205 if (delete_item(fname, st.st_mode, t, del_opts) != 0)
1207 } else if (basis_dir[0] != NULL) {
1208 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &st,
1209 itemizing, maybe_ATTRS_REPORT, code);
1211 #ifndef CAN_HARDLINK_SPECIAL
1213 /* Resort to --copy-dest behavior. */
1223 if (preserve_hard_links && file->link_u.links
1224 && hard_link_check(file, ndx, fname, -1, &st,
1225 itemizing, code, HL_SKIP))
1228 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
1229 fname, (int)file->mode, (int)file->u.rdev);
1231 if (do_mknod(fname, file->mode, file->u.rdev) < 0) {
1232 rsyserr(FERROR, errno, "mknod %s failed",
1235 set_file_attrs(fname, file, NULL, 0);
1237 itemize(file, ndx, statret, &st,
1238 ITEM_LOCAL_CHANGE, 0, NULL);
1240 if (code != FNONE && verbose)
1241 rprintf(code, "%s\n", fname);
1242 if (preserve_hard_links && file->link_u.links)
1243 hard_link_cluster(file, ndx, itemizing, code);
1244 if (remove_source_files == 1)
1245 goto return_with_success;
1250 if (!S_ISREG(file->mode)) {
1251 if (the_file_list->count == 1)
1252 fname = f_name(file, NULL);
1253 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1257 if (max_size && file->length > max_size) {
1259 if (the_file_list->count == 1)
1260 fname = f_name(file, NULL);
1261 rprintf(FINFO, "%s is over max-size\n", fname);
1265 if (min_size && file->length < min_size) {
1267 if (the_file_list->count == 1)
1268 fname = f_name(file, NULL);
1269 rprintf(FINFO, "%s is under min-size\n", fname);
1274 if (ignore_existing && statret == 0) {
1276 rprintf(FINFO, "%s exists\n", fname);
1280 if (update_only && statret == 0
1281 && cmp_time(st.st_mtime, file->modtime) > 0) {
1283 rprintf(FINFO, "%s is newer\n", fname);
1288 fnamecmp_type = FNAMECMP_FNAME;
1290 if (statret == 0 && !S_ISREG(st.st_mode)) {
1291 if (delete_item(fname, st.st_mode, "regular file", del_opts) != 0)
1294 stat_errno = ENOENT;
1297 if (statret != 0 && basis_dir[0] != NULL) {
1298 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &st,
1299 itemizing, maybe_ATTRS_REPORT, code);
1301 if (remove_source_files == 1)
1302 goto return_with_success;
1306 fnamecmp = fnamecmpbuf;
1315 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1316 && link_stat(partialptr, &partial_st, 0) == 0
1317 && S_ISREG(partial_st.st_mode)) {
1319 goto prepare_to_open;
1323 if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
1324 int j = find_fuzzy(file, fuzzy_dirlist);
1326 fuzzy_file = fuzzy_dirlist->files[j];
1327 f_name(fuzzy_file, fnamecmpbuf);
1329 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1330 fname, fnamecmpbuf);
1332 st.st_size = fuzzy_file->length;
1334 fnamecmp = fnamecmpbuf;
1335 fnamecmp_type = FNAMECMP_FUZZY;
1340 if (preserve_hard_links && file->link_u.links
1341 && hard_link_check(file, ndx, fname, statret, &st,
1342 itemizing, code, HL_SKIP))
1344 if (stat_errno == ENOENT)
1346 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1351 if (append_mode && st.st_size > file->length)
1354 if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1356 else if (fnamecmp_type == FNAMECMP_FUZZY)
1358 else if (unchanged_file(fnamecmp, file, &st)) {
1360 do_unlink(partialptr);
1361 handle_partial_dir(partialptr, PDIR_DELETE);
1364 itemize(file, ndx, real_ret, &real_st,
1367 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1368 if (preserve_hard_links && file->link_u.links)
1369 hard_link_cluster(file, ndx, itemizing, code);
1370 if (remove_source_files != 1)
1372 return_with_success:
1375 SIVAL(numbuf, 0, ndx);
1376 send_msg(MSG_SUCCESS, numbuf, 4);
1384 fnamecmp = partialptr;
1385 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1389 if (!do_xfers || read_batch || whole_file)
1392 if (fuzzy_dirlist) {
1393 int j = flist_find(fuzzy_dirlist, file);
1394 if (j >= 0) /* don't use changing file as future fuzzy basis */
1395 fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1399 fd = do_open(fnamecmp, O_RDONLY, 0);
1402 rsyserr(FERROR, errno, "failed to open %s, continuing",
1403 full_fname(fnamecmp));
1405 /* pretend the file didn't exist */
1406 if (preserve_hard_links && file->link_u.links
1407 && hard_link_check(file, ndx, fname, statret, &st,
1408 itemizing, code, HL_SKIP))
1410 statret = real_ret = -1;
1414 if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1415 if (!(backupptr = get_backup_name(fname))) {
1419 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1421 goto pretend_missing;
1423 if (robust_unlink(backupptr) && errno != ENOENT) {
1424 rsyserr(FERROR, errno, "unlink %s",
1425 full_fname(backupptr));
1430 if ((f_copy = do_open(backupptr,
1431 O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1432 rsyserr(FERROR, errno, "open %s",
1433 full_fname(backupptr));
1438 fnamecmp_type = FNAMECMP_BACKUP;
1442 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1443 fnamecmp, (double)st.st_size);
1447 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1450 if (remove_source_files && !delay_updates && !phase)
1451 increment_active_files(ndx, itemizing, code);
1452 write_int(f_out, ndx);
1454 int iflags = ITEM_TRANSFER;
1455 if (always_checksum)
1456 iflags |= ITEM_REPORT_CHECKSUM;
1457 if (fnamecmp_type != FNAMECMP_FNAME)
1458 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1459 if (fnamecmp_type == FNAMECMP_FUZZY)
1460 iflags |= ITEM_XNAME_FOLLOWS;
1461 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1462 fuzzy_file ? fuzzy_file->basename : NULL);
1466 if (preserve_hard_links && file->link_u.links)
1467 hard_link_cluster(file, ndx, itemizing, code);
1473 if (statret != 0 || whole_file) {
1474 write_sum_head(f_out, NULL);
1478 generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1482 set_file_attrs(backupptr, back_file, NULL, 0);
1484 rprintf(FINFO, "backed up %s to %s\n",
1493 void generate_files(int f_out, struct file_list *flist, char *local_name)
1496 char fbuf[MAXPATHLEN];
1497 int itemizing, maybe_ATTRS_REPORT;
1499 int lull_mod = allowed_lull * 5;
1500 int need_retouch_dir_times = preserve_times && !omit_dir_times;
1501 int need_retouch_dir_perms = 0;
1502 int save_ignore_existing = ignore_existing;
1503 int save_ignore_non_existing = ignore_non_existing;
1504 int save_do_progress = do_progress;
1505 int save_make_backups = make_backups;
1506 int dir_tweaking = !(list_only || local_name || dry_run);
1508 if (protocol_version >= 29) {
1510 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1511 code = logfile_format_has_i ? FNONE : FLOG;
1512 } else if (am_daemon) {
1513 itemizing = logfile_format_has_i && do_xfers;
1514 maybe_ATTRS_REPORT = ATTRS_REPORT;
1515 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1516 } else if (!am_server) {
1517 itemizing = stdout_format_has_i;
1518 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1519 code = itemizing ? FNONE : FINFO;
1522 maybe_ATTRS_REPORT = ATTRS_REPORT;
1527 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1528 (long)getpid(), flist->count);
1531 if (delete_before && !local_name && flist->count > 0)
1532 do_delete_pass(flist);
1535 if (append_mode || whole_file < 0)
1538 rprintf(FINFO, "delta-transmission %s\n",
1540 ? "disabled for local transfer or --whole-file"
1544 /* Since we often fill up the outgoing socket and then just sit around
1545 * waiting for the other 2 processes to do their thing, we don't want
1546 * to exit on a timeout. If the data stops flowing, the receiver will
1547 * notice that and let us know via the redo pipe (or its closing). */
1550 for (i = 0; i < flist->count; i++) {
1551 struct file_struct *file = flist->files[i];
1553 if (!file->basename)
1557 strlcpy(fbuf, local_name, sizeof fbuf);
1560 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1563 /* We need to ensure that any dirs we create have writeable
1564 * permissions during the time we are putting files within
1565 * them. This is then fixed after the transfer is done. */
1567 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1569 mode_t mode = file->mode | S_IWUSR; /* user write */
1570 char *fname = local_name ? local_name : fbuf;
1571 if (do_chmod(fname, mode) < 0) {
1572 rsyserr(FERROR, errno,
1573 "failed to modify permissions on %s",
1576 need_retouch_dir_perms = 1;
1580 if (preserve_hard_links)
1581 check_for_finished_hlinks(itemizing, code);
1583 if (allowed_lull && !(i % lull_mod))
1584 maybe_send_keepalive();
1585 else if (!(i % 200))
1586 maybe_flush_socket();
1588 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1590 delete_in_dir(NULL, NULL, NULL, NULL);
1593 csum_length = SUM_LENGTH;
1594 max_size = min_size = ignore_existing = ignore_non_existing = 0;
1595 update_only = always_checksum = size_only = 0;
1597 if (append_mode) /* resend w/o append mode */
1598 append_mode = -1; /* ... but only longer files */
1599 make_backups = 0; /* avoid a duplicate backup for inplace processing */
1602 rprintf(FINFO,"generate_files phase=%d\n",phase);
1604 write_int(f_out, -1);
1606 /* files can cycle through the system more than once
1607 * to catch initial checksum errors */
1608 while ((i = get_redo_num(itemizing, code)) != -1) {
1609 struct file_struct *file = flist->files[i];
1611 strlcpy(fbuf, local_name, sizeof fbuf);
1614 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1619 ignore_non_existing = save_ignore_non_existing;
1620 ignore_existing = save_ignore_existing;
1621 make_backups = save_make_backups;
1624 rprintf(FINFO,"generate_files phase=%d\n",phase);
1626 write_int(f_out, -1);
1627 /* Reduce round-trip lag-time for a useless delay-updates phase. */
1628 if (protocol_version >= 29 && !delay_updates)
1629 write_int(f_out, -1);
1631 /* Read MSG_DONE for the redo phase (and any prior messages). */
1632 get_redo_num(itemizing, code);
1634 if (protocol_version >= 29) {
1637 rprintf(FINFO, "generate_files phase=%d\n", phase);
1639 write_int(f_out, -1);
1640 /* Read MSG_DONE for delay-updates phase & prior messages. */
1641 get_redo_num(itemizing, code);
1644 do_progress = save_do_progress;
1645 if (delete_after && !local_name && flist->count > 0)
1646 do_delete_pass(flist);
1648 if ((need_retouch_dir_perms || need_retouch_dir_times) && dir_tweaking) {
1650 /* Now we need to fix any directory permissions that were
1651 * modified during the transfer and/or re-set any tweaked
1652 * modified-time values. */
1653 for (i = 0; i < flist->count; i++) {
1654 struct file_struct *file = flist->files[i];
1656 if (!file->basename || !S_ISDIR(file->mode))
1658 if (!need_retouch_dir_times && file->mode & S_IWUSR)
1660 if (file->flags & FLAG_MISSING) {
1661 int missing = file->dir.depth;
1662 while (++i < flist->count) {
1663 file = flist->files[i];
1664 if (file->dir.depth <= missing)
1670 recv_generator(f_name(file, NULL), file, i, itemizing,
1671 maybe_ATTRS_REPORT, code, -1);
1672 if (allowed_lull && !(++j % lull_mod))
1673 maybe_send_keepalive();
1674 else if (!(j % 200))
1675 maybe_flush_socket();
1678 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1680 if (max_delete >= 0 && deletion_count > max_delete) {
1682 "Deletions stopped due to --max-delete limit (%d skipped)\n",
1683 deletion_count - max_delete);
1684 io_error |= IOERR_DEL_LIMIT;
1688 rprintf(FINFO,"generate_files finished\n");