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 read_batch;
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;
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, STRUCT_STAT *stp)
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];
228 while (cur_depth >= min_depth)
229 pop_local_filters(filt_array[cur_depth--]);
230 min_depth = MAXPATHLEN;
236 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
239 maybe_send_keepalive();
241 if (file->dir.depth >= MAXPATHLEN/2+1)
242 return; /* Impossible... */
244 if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
248 "IO error encountered -- skipping file deletion\n");
253 while (cur_depth >= file->dir.depth && cur_depth >= min_depth)
254 pop_local_filters(filt_array[cur_depth--]);
255 cur_depth = file->dir.depth;
256 if (min_depth > cur_depth)
257 min_depth = cur_depth;
259 filt_array[cur_depth] = push_local_filters(fbuf, dlen);
261 if (one_file_system) {
262 if (file->flags & FLAG_TOP_DIR)
263 filesystem_dev = stp->st_dev;
264 else if (filesystem_dev != stp->st_dev)
268 dirlist = get_dirlist(fbuf, dlen, 0);
270 /* If an item in dirlist is not found in flist, delete it
271 * from the filesystem. */
272 for (i = dirlist->count; i--; ) {
273 struct file_struct *fp = dirlist->files[i];
274 if (!fp->basename || fp->flags & FLAG_MOUNT_POINT)
276 if (flist_find(flist, fp) < 0) {
278 delete_item(delbuf, fp->mode, DEL_FORCE_RECURSE);
285 /* This deletes any files on the receiving side that are not present on the
286 * sending side. This is used by --delete-before and --delete-after. */
287 static void do_delete_pass(struct file_list *flist)
289 char fbuf[MAXPATHLEN];
293 /* dry_run is incremented when the destination doesn't exist yet. */
294 if (dry_run > 1 || list_only)
297 for (j = 0; j < flist->count; j++) {
298 struct file_struct *file = flist->files[j];
300 if (!(file->flags & FLAG_DEL_HERE))
304 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
305 rprintf(FINFO, "deleting in %s\n", fbuf);
307 if (link_stat(fbuf, &st, keep_dirlinks) < 0
308 || !S_ISDIR(st.st_mode))
311 delete_in_dir(flist, fbuf, file, &st);
313 delete_in_dir(NULL, NULL, NULL, NULL);
315 if (do_progress && !am_server)
316 rprintf(FINFO, " \r");
319 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)
334 void itemize(struct file_struct *file, int ndx, int statret, STRUCT_STAT *st,
335 int32 iflags, uchar fnamecmp_type, char *xname)
337 if (statret >= 0) { /* A from-dest-dir statret can == 1! */
338 int keep_time = !preserve_times ? 0
339 : S_ISDIR(file->mode) ? !omit_dir_times
340 : !S_ISLNK(file->mode);
342 if (S_ISREG(file->mode) && file->length != st->st_size)
343 iflags |= ITEM_REPORT_SIZE;
344 if ((iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !keep_time
345 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
346 || (keep_time && cmp_time(file->modtime, st->st_mtime) != 0))
347 iflags |= ITEM_REPORT_TIME;
348 if ((file->mode & CHMOD_BITS) != (st->st_mode & CHMOD_BITS))
349 iflags |= ITEM_REPORT_PERMS;
350 if (preserve_uid && am_root && file->uid != st->st_uid)
351 iflags |= ITEM_REPORT_OWNER;
352 if (preserve_gid && file->gid != GID_NONE
353 && st->st_gid != file->gid)
354 iflags |= ITEM_REPORT_GROUP;
356 iflags |= ITEM_IS_NEW;
359 if ((iflags & SIGNIFICANT_ITEM_FLAGS || verbose > 1
360 || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
361 if (protocol_version >= 29) {
363 write_int(sock_f_out, ndx);
364 write_shortint(sock_f_out, iflags);
365 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
366 write_byte(sock_f_out, fnamecmp_type);
367 if (iflags & ITEM_XNAME_FOLLOWS)
368 write_vstring(sock_f_out, xname, strlen(xname));
369 } else if (ndx >= 0) {
370 enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
371 log_item(code, file, &stats, iflags, xname);
377 /* Perform our quick-check heuristic for determining if a file is unchanged. */
378 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
380 if (st->st_size != file->length)
383 /* if always checksum is set then we use the checksum instead
384 of the file time to determine whether to sync */
385 if (always_checksum && S_ISREG(st->st_mode)) {
386 char sum[MD4_SUM_LENGTH];
387 file_checksum(fn, sum, st->st_size);
388 return memcmp(sum, file->u.sum, checksum_len) == 0;
397 return cmp_time(st->st_mtime, file->modtime) == 0;
402 * set (initialize) the size entries in the per-file sum_struct
403 * calculating dynamic block and checksum sizes.
405 * This is only called from generate_and_send_sums() but is a separate
406 * function to encapsulate the logic.
408 * The block size is a rounded square root of file length.
410 * The checksum size is determined according to:
411 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
412 * provided by Donovan Baarda which gives a probability of rsync
413 * algorithm corrupting data and falling back using the whole md4
416 * This might be made one of several selectable heuristics.
418 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
424 blength = block_size;
425 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
426 blength = BLOCK_SIZE;
431 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
432 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
433 blength = MAX_BLOCK_SIZE;
438 if (len < (int64)blength * blength)
441 } while (c >= 8); /* round to multiple of 8 */
442 blength = MAX(blength, BLOCK_SIZE);
446 if (protocol_version < 27) {
447 s2length = csum_length;
448 } else if (csum_length == SUM_LENGTH) {
449 s2length = SUM_LENGTH;
453 int b = BLOCKSUM_BIAS;
454 for (l = len; l >>= 1; b += 2) {}
455 for (c = blength; c >>= 1 && b; b--) {}
456 /* add a bit, subtract rollsum, round up. */
457 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
458 s2length = MAX(s2length, csum_length);
459 s2length = MIN(s2length, SUM_LENGTH);
463 sum->blength = blength;
464 sum->s2length = s2length;
465 sum->remainder = len % blength;
466 sum->count = len / blength + (sum->remainder != 0);
468 if (sum->count && verbose > 2) {
470 "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
471 (double)sum->count, (long)sum->remainder, (long)sum->blength,
472 sum->s2length, (double)sum->flength);
478 * Generate and send a stream of signatures/checksums that describe a buffer
480 * Generate approximately one checksum every block_len bytes.
482 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
485 struct map_struct *mapbuf;
486 struct sum_struct sum;
489 sum_sizes_sqroot(&sum, len);
490 write_sum_head(f_out, &sum);
492 if (append_mode > 0 && f_copy < 0)
496 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
500 for (i = 0; i < sum.count; i++) {
501 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
502 char *map = map_ptr(mapbuf, offset, n1);
503 char sum2[SUM_LENGTH];
510 full_write(f_copy, map, n1);
515 sum1 = get_checksum1(map, n1);
516 get_checksum2(map, n1, sum2);
520 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
521 (double)i, (double)offset - n1, (long)n1,
522 (unsigned long)sum1);
524 write_int(f_out, sum1);
525 write_buf(f_out, sum2, sum.s2length);
533 /* Try to find a filename in the same dir as "fname" with a similar name. */
534 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
536 int fname_len, fname_suf_len;
537 const char *fname_suf, *fname = file->basename;
538 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
539 int j, lowest_j = -1;
541 fname_len = strlen(fname);
542 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
544 for (j = 0; j < dirlist->count; j++) {
545 struct file_struct *fp = dirlist->files[j];
546 const char *suf, *name;
550 if (!S_ISREG(fp->mode) || !fp->length
551 || fp->flags & FLAG_NO_FUZZY)
556 if (fp->length == file->length
557 && cmp_time(fp->modtime, file->modtime) == 0) {
560 "fuzzy size/modtime match for %s\n",
567 suf = find_filename_suffix(name, len, &suf_len);
569 dist = fuzzy_distance(name, len, fname, fname_len);
570 /* Add some extra weight to how well the suffixes match. */
571 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
574 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
575 name, (int)(dist>>16), (int)(dist&0xFFFF));
577 if (dist <= lowest_dist) {
586 void check_for_finished_hlinks(int itemizing, enum logcode code)
588 struct file_struct *file;
591 while ((ndx = get_hlink_num()) != -1) {
592 if (ndx < 0 || ndx >= the_file_list->count)
595 file = the_file_list->files[ndx];
596 if (!file->link_u.links)
599 hard_link_cluster(file, ndx, itemizing, code);
603 /* This is only called for regular files. We return -2 if we've finished
604 * handling the file, -1 if no dest-linking occurred, or a non-negative
605 * value if we found an alternate basis file. */
606 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
607 char *cmpbuf, STRUCT_STAT *stp, int itemizing,
608 int maybe_ATTRS_REPORT, enum logcode code)
615 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
616 if (link_stat(cmpbuf, stp, 0) < 0 || !S_ISREG(stp->st_mode))
618 switch (match_level) {
624 if (!unchanged_file(cmpbuf, file, stp))
630 if (!unchanged_attrs(file, stp))
632 if (always_checksum && preserve_times
633 && cmp_time(stp->st_mtime, file->modtime))
640 } while (basis_dir[++j] != NULL);
645 if (j != best_match) {
647 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
648 if (link_stat(cmpbuf, stp, 0) < 0)
652 if (match_level == 3 && !copy_dest) {
653 #ifdef SUPPORT_HARD_LINKS
655 if (hard_link_one(file, ndx, fname, 0, stp,
657 itemizing && verbose > 1,
660 if (preserve_hard_links && file->link_u.links)
661 hard_link_cluster(file, ndx, itemizing, code);
665 itemize(file, ndx, 0, stp, 0, 0, NULL);
666 if (verbose > 1 && maybe_ATTRS_REPORT) {
667 rprintf(FCLIENT, "%s is uptodate\n", fname);
672 if (match_level >= 2) {
673 try_a_copy: /* Copy the file locally. */
674 if (copy_file(cmpbuf, fname, file->mode) < 0) {
676 rsyserr(FINFO, errno, "copy_file %s => %s",
677 full_fname(cmpbuf), fname);
682 itemize(file, ndx, 0, stp, ITEM_LOCAL_CHANGE, 0, NULL);
683 set_file_attrs(fname, file, NULL, 0);
684 if (maybe_ATTRS_REPORT
685 && ((!itemizing && verbose && match_level == 2)
686 || (verbose > 1 && match_level == 3))) {
687 code = match_level == 3 ? FCLIENT : FINFO;
688 rprintf(code, "%s%s\n", fname,
689 match_level == 3 ? " is uptodate" : "");
691 if (preserve_hard_links && file->link_u.links)
692 hard_link_cluster(file, ndx, itemizing, code);
696 return FNAMECMP_BASIS_DIR_LOW + j;
699 /* This is only called for non-regular files. We return -2 if we've finished
700 * handling the file, or -1 if no dest-linking occurred. */
701 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
702 int itemizing, int maybe_ATTRS_REPORT,
705 char fnamebuf[MAXPATHLEN];
710 pathjoin(fnamebuf, MAXPATHLEN, basis_dir[i], fname);
711 if (link_stat(fnamebuf, &st, 0) < 0 || S_ISDIR(st.st_mode)
712 || !unchanged_attrs(file, &st))
714 if (S_ISLNK(file->mode)) {
716 char lnk[MAXPATHLEN];
718 if ((len = readlink(fnamebuf, lnk, MAXPATHLEN-1)) <= 0)
721 if (strcmp(lnk, file->u.link) != 0)
724 } else if (IS_SPECIAL(file->mode)) {
725 if (!IS_SPECIAL(st.st_mode) || st.st_rdev != file->u.rdev)
727 } else if (IS_DEVICE(file->mode)) {
728 if (!IS_DEVICE(st.st_mode) || st.st_rdev != file->u.rdev)
732 "internal: try_dests_non() called with invalid mode (%o)\n",
734 exit_cleanup(RERR_UNSUPPORTED);
736 #ifdef SUPPORT_HARD_LINKS
738 #ifndef CAN_HARDLINK_SYMLINK
739 && !S_ISLNK(file->mode)
741 #ifndef CAN_HARDLINK_SPECIAL
742 && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
745 if (do_link(fnamebuf, fname) < 0) {
746 rsyserr(FERROR, errno,
747 "failed to hard-link %s with %s",
751 if (preserve_hard_links && file->link_u.links)
752 hard_link_cluster(file, ndx, itemizing, code);
755 if (itemizing && stdout_format_has_i && verbose > 1) {
756 int changes = compare_dest ? 0 : ITEM_LOCAL_CHANGE
757 + (link_dest ? ITEM_XNAME_FOLLOWS : 0);
758 char *lp = link_dest ? "" : NULL;
759 itemize(file, ndx, 0, &st, changes, 0, lp);
761 if (verbose > 1 && maybe_ATTRS_REPORT) {
762 rprintf(FCLIENT, "%s is uptodate\n", fname);
765 } while (basis_dir[++i] != NULL);
770 static int phase = 0;
772 /* Acts on the_file_list->file's ndx'th item, whose name is fname. If a dir,
773 * make sure it exists, and has the right permissions/timestamp info. For
774 * all other non-regular files (symlinks, etc.) we create them here. For
775 * regular files that have changed, we try to find a basis file and then
776 * start sending checksums.
778 * When fname is non-null, it must point to a MAXPATHLEN buffer!
780 * Note that f_out is set to -1 when doing final directory-permission and
781 * modification-time repair. */
782 static void recv_generator(char *fname, struct file_struct *file, int ndx,
783 int itemizing, int maybe_ATTRS_REPORT,
784 enum logcode code, int f_out)
786 static int missing_below = -1, excluded_below = -1;
787 static char *parent_dirname = "";
788 static struct file_list *fuzzy_dirlist = NULL;
789 static int need_fuzzy_dirlist = 0;
790 struct file_struct *fuzzy_file = NULL;
791 int fd = -1, f_copy = -1;
792 STRUCT_STAT st, real_st, partial_st;
793 struct file_struct *back_file = NULL;
794 int statret, real_ret, stat_errno;
795 char *fnamecmp, *partialptr, *backupptr = NULL;
796 char fnamecmpbuf[MAXPATHLEN];
798 int del_opts = DEL_TERSE | (delete_mode ? DEL_FORCE_RECURSE : 0);
805 flist_free(fuzzy_dirlist);
806 fuzzy_dirlist = NULL;
808 if (missing_below >= 0) {
818 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
820 if (server_filter_list.head) {
821 if (excluded_below >= 0) {
822 if (file->dir.depth > excluded_below)
826 if (check_filter(&server_filter_list, fname,
827 S_ISDIR(file->mode)) < 0) {
828 if (S_ISDIR(file->mode))
829 excluded_below = file->dir.depth;
833 "skipping server-excluded file \"%s\"\n",
840 if (missing_below >= 0) {
841 if (file->dir.depth <= missing_below) {
852 char *dn = file->dirname ? file->dirname : ".";
853 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
854 if (relative_paths && !implied_dirs
855 && safe_stat(dn, &st) < 0
856 && create_directory_path(fname) < 0) {
857 rsyserr(FERROR, errno,
858 "recv_generator: mkdir %s failed",
862 flist_free(fuzzy_dirlist);
863 fuzzy_dirlist = NULL;
866 need_fuzzy_dirlist = 1;
870 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
871 fuzzy_dirlist = get_dirlist(dn, -1, 1);
872 need_fuzzy_dirlist = 0;
875 statret = link_stat(fname, &st,
876 keep_dirlinks && S_ISDIR(file->mode));
880 if (ignore_non_existing && statret == -1 && stat_errno == ENOENT) {
882 rprintf(FINFO, "not creating new %s \"%s\"\n",
883 S_ISDIR(file->mode) ? "directory" : "file",
889 /* If we're not preserving permissions, change the file-list's
890 * mode based on the local permissions and some heuristics. */
891 if (!preserve_perms) {
892 int exists = statret == 0
893 && S_ISDIR(st.st_mode) == S_ISDIR(file->mode);
894 file->mode = dest_mode(file->mode, st.st_mode, exists);
897 if (S_ISDIR(file->mode)) {
898 /* The file to be received is a directory, so we need
899 * to prepare appropriately. If there is already a
900 * file of that name and it is *not* a directory, then
901 * we need to delete it. If it doesn't exist, then
902 * (perhaps recursively) create it. */
903 if (statret == 0 && !S_ISDIR(st.st_mode)) {
904 if (delete_item(fname, st.st_mode, del_opts) < 0)
908 if (dry_run && statret != 0 && missing_below < 0) {
909 missing_below = file->dir.depth;
912 if (itemizing && f_out != -1) {
913 itemize(file, ndx, statret, &st,
914 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
916 if (statret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
917 if (!relative_paths || errno != ENOENT
918 || create_directory_path(fname) < 0
919 || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
920 rsyserr(FERROR, errno,
921 "recv_generator: mkdir %s failed",
923 file->flags |= FLAG_MISSING;
924 if (ndx+1 < the_file_list->count
925 && the_file_list->files[ndx+1]->dir.depth > file->dir.depth) {
927 "*** Skipping everything below this failed directory ***\n");
928 missing_below = file->dir.depth;
933 if (set_file_attrs(fname, file, statret ? NULL : &st, 0)
934 && verbose && code && f_out != -1)
935 rprintf(code, "%s/\n", fname);
936 if (delete_during && f_out != -1 && !phase && dry_run < 2
937 && (file->flags & FLAG_DEL_HERE))
938 delete_in_dir(the_file_list, fname, file, &st);
942 if (preserve_hard_links && file->link_u.links
943 && hard_link_check(file, ndx, fname, statret, &st,
944 itemizing, code, HL_CHECK_MASTER))
947 if (preserve_links && S_ISLNK(file->mode)) {
949 if (safe_symlinks && unsafe_symlink(file->u.link, fname)) {
951 if (the_file_list->count == 1)
952 fname = f_name(file, NULL);
954 "ignoring unsafe symlink %s -> \"%s\"\n",
955 full_fname(fname), file->u.link);
960 char lnk[MAXPATHLEN];
963 if (!S_ISDIR(st.st_mode)
964 && (len = readlink(fname, lnk, MAXPATHLEN-1)) > 0) {
966 /* A link already pointing to the
967 * right place -- no further action
969 if (strcmp(lnk, file->u.link) == 0) {
971 itemize(file, ndx, 0, &st, 0,
974 set_file_attrs(fname, file, &st,
976 if (preserve_hard_links
977 && file->link_u.links) {
978 hard_link_cluster(file, ndx,
982 if (remove_source_files == 1)
983 goto return_with_success;
987 /* Not the right symlink (or not a symlink), so
989 if (delete_item(fname, st.st_mode, del_opts) < 0)
991 if (!S_ISLNK(st.st_mode))
993 } else if (basis_dir[0] != NULL) {
994 if (try_dests_non(file, fname, ndx, itemizing,
995 maybe_ATTRS_REPORT, code) == -2) {
996 #ifndef CAN_HARDLINK_SYMLINK
998 /* Resort to --copy-dest behavior. */
1003 itemizing = code = 0;
1006 if (preserve_hard_links && file->link_u.links
1007 && hard_link_check(file, ndx, fname, -1, &st,
1008 itemizing, code, HL_SKIP))
1010 if (do_symlink(file->u.link,fname) != 0) {
1011 rsyserr(FERROR, errno, "symlink %s -> \"%s\" failed",
1012 full_fname(fname), file->u.link);
1014 set_file_attrs(fname, file, NULL, 0);
1016 itemize(file, ndx, statret, &st,
1017 ITEM_LOCAL_CHANGE, 0, NULL);
1019 if (code && verbose) {
1020 rprintf(code, "%s -> %s\n", fname,
1023 if (preserve_hard_links && file->link_u.links)
1024 hard_link_cluster(file, ndx, itemizing, code);
1025 if (remove_source_files)
1026 goto return_with_success;
1032 if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1033 || (preserve_specials && IS_SPECIAL(file->mode))) {
1034 if (statret != 0 && basis_dir[0] != NULL) {
1035 if (try_dests_non(file, fname, ndx, itemizing,
1036 maybe_ATTRS_REPORT, code) == -2) {
1037 #ifndef CAN_HARDLINK_SPECIAL
1039 /* Resort to --copy-dest behavior. */
1044 itemizing = code = 0;
1048 || (st.st_mode & ~CHMOD_BITS) != (file->mode & ~CHMOD_BITS)
1049 || st.st_rdev != file->u.rdev) {
1051 && delete_item(fname, st.st_mode, del_opts) < 0)
1053 if (preserve_hard_links && file->link_u.links
1054 && hard_link_check(file, ndx, fname, -1, &st,
1055 itemizing, code, HL_SKIP))
1057 if ((IS_DEVICE(file->mode) && !IS_DEVICE(st.st_mode))
1058 || (IS_SPECIAL(file->mode) && !IS_SPECIAL(st.st_mode)))
1061 rprintf(FINFO,"mknod(%s,0%o,0x%x)\n",
1063 (int)file->mode, (int)file->u.rdev);
1065 if (do_mknod(fname,file->mode,file->u.rdev) < 0) {
1066 rsyserr(FERROR, errno, "mknod %s failed",
1069 set_file_attrs(fname, file, NULL, 0);
1071 itemize(file, ndx, statret, &st,
1072 ITEM_LOCAL_CHANGE, 0, NULL);
1074 if (code && verbose)
1075 rprintf(code, "%s\n", fname);
1076 if (preserve_hard_links && file->link_u.links) {
1077 hard_link_cluster(file, ndx,
1080 if (remove_source_files == 1)
1081 goto return_with_success;
1085 itemize(file, ndx, statret, &st, 0, 0, NULL);
1086 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1087 if (preserve_hard_links && file->link_u.links)
1088 hard_link_cluster(file, ndx, itemizing, code);
1089 if (remove_source_files == 1)
1090 goto return_with_success;
1095 if (!S_ISREG(file->mode)) {
1096 if (the_file_list->count == 1)
1097 fname = f_name(file, NULL);
1098 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1102 if (max_size && file->length > max_size) {
1104 if (the_file_list->count == 1)
1105 fname = f_name(file, NULL);
1106 rprintf(FINFO, "%s is over max-size\n", fname);
1110 if (min_size && file->length < min_size) {
1112 if (the_file_list->count == 1)
1113 fname = f_name(file, NULL);
1114 rprintf(FINFO, "%s is under min-size\n", fname);
1119 if (ignore_existing && statret == 0) {
1121 rprintf(FINFO, "%s exists\n", fname);
1125 if (update_only && statret == 0
1126 && cmp_time(st.st_mtime, file->modtime) > 0) {
1128 rprintf(FINFO, "%s is newer\n", fname);
1133 fnamecmp_type = FNAMECMP_FNAME;
1135 if (statret == 0 && !S_ISREG(st.st_mode)) {
1136 if (delete_item(fname, st.st_mode, del_opts) != 0)
1139 stat_errno = ENOENT;
1142 if (statret != 0 && basis_dir[0] != NULL) {
1143 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &st,
1144 itemizing, maybe_ATTRS_REPORT, code);
1146 if (remove_source_files == 1)
1147 goto return_with_success;
1151 fnamecmp = fnamecmpbuf;
1160 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1161 && link_stat(partialptr, &partial_st, 0) == 0
1162 && S_ISREG(partial_st.st_mode)) {
1164 goto prepare_to_open;
1168 if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
1169 int j = find_fuzzy(file, fuzzy_dirlist);
1171 fuzzy_file = fuzzy_dirlist->files[j];
1172 f_name(fuzzy_file, fnamecmpbuf);
1174 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1175 fname, fnamecmpbuf);
1177 st.st_size = fuzzy_file->length;
1179 fnamecmp = fnamecmpbuf;
1180 fnamecmp_type = FNAMECMP_FUZZY;
1185 if (preserve_hard_links && file->link_u.links
1186 && hard_link_check(file, ndx, fname, statret, &st,
1187 itemizing, code, HL_SKIP))
1189 if (stat_errno == ENOENT)
1191 rsyserr(FERROR, stat_errno, "recv_generator: failed to stat %s",
1196 if (append_mode && st.st_size > file->length)
1199 if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1201 else if (fnamecmp_type == FNAMECMP_FUZZY)
1203 else if (unchanged_file(fnamecmp, file, &st)) {
1205 do_unlink(partialptr);
1206 handle_partial_dir(partialptr, PDIR_DELETE);
1209 itemize(file, ndx, real_ret, &real_st,
1212 set_file_attrs(fname, file, &st, maybe_ATTRS_REPORT);
1213 if (preserve_hard_links && file->link_u.links)
1214 hard_link_cluster(file, ndx, itemizing, code);
1215 if (remove_source_files != 1)
1217 return_with_success:
1220 SIVAL(numbuf, 0, ndx);
1221 send_msg(MSG_SUCCESS, numbuf, 4);
1229 fnamecmp = partialptr;
1230 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1234 if (!do_xfers || read_batch || whole_file)
1237 if (fuzzy_dirlist) {
1238 int j = flist_find(fuzzy_dirlist, file);
1239 if (j >= 0) /* don't use changing file as future fuzzy basis */
1240 fuzzy_dirlist->files[j]->flags |= FLAG_NO_FUZZY;
1244 fd = do_open(fnamecmp, O_RDONLY, 0);
1247 rsyserr(FERROR, errno, "failed to open %s, continuing",
1248 full_fname(fnamecmp));
1250 /* pretend the file didn't exist */
1251 if (preserve_hard_links && file->link_u.links
1252 && hard_link_check(file, ndx, fname, statret, &st,
1253 itemizing, code, HL_SKIP))
1255 statret = real_ret = -1;
1259 if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
1260 if (!(backupptr = get_backup_name(fname))) {
1264 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1266 goto pretend_missing;
1268 if (robust_unlink(backupptr) && errno != ENOENT) {
1269 rsyserr(FERROR, errno, "unlink %s",
1270 full_fname(backupptr));
1275 if ((f_copy = do_open(backupptr,
1276 O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1277 rsyserr(FERROR, errno, "open %s",
1278 full_fname(backupptr));
1283 fnamecmp_type = FNAMECMP_BACKUP;
1287 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1288 fnamecmp, (double)st.st_size);
1292 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1295 if (remove_source_files && !delay_updates && !phase)
1296 increment_active_files(ndx, itemizing, code);
1297 write_int(f_out, ndx);
1299 int iflags = ITEM_TRANSFER;
1300 if (always_checksum)
1301 iflags |= ITEM_REPORT_CHECKSUM;
1302 if (fnamecmp_type != FNAMECMP_FNAME)
1303 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1304 if (fnamecmp_type == FNAMECMP_FUZZY)
1305 iflags |= ITEM_XNAME_FOLLOWS;
1306 itemize(file, -1, real_ret, &real_st, iflags, fnamecmp_type,
1307 fuzzy_file ? fuzzy_file->basename : NULL);
1311 if (preserve_hard_links && file->link_u.links)
1312 hard_link_cluster(file, ndx, itemizing, code);
1318 if (statret != 0 || whole_file) {
1319 write_sum_head(f_out, NULL);
1323 generate_and_send_sums(fd, st.st_size, f_out, f_copy);
1327 set_file_attrs(backupptr, back_file, NULL, 0);
1329 rprintf(FINFO, "backed up %s to %s\n",
1338 void generate_files(int f_out, struct file_list *flist, char *local_name)
1341 char fbuf[MAXPATHLEN];
1342 int itemizing, maybe_ATTRS_REPORT;
1344 int lull_mod = allowed_lull * 5;
1345 int need_retouch_dir_times = preserve_times && !omit_dir_times;
1346 int need_retouch_dir_perms = 0;
1347 int save_ignore_existing = ignore_existing;
1348 int save_ignore_non_existing = ignore_non_existing;
1349 int save_do_progress = do_progress;
1350 int save_make_backups = make_backups;
1351 int dir_tweaking = !(list_only || local_name || dry_run);
1353 if (protocol_version >= 29) {
1355 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1356 code = logfile_format_has_i ? 0 : FLOG;
1357 } else if (am_daemon) {
1358 itemizing = logfile_format_has_i && do_xfers;
1359 maybe_ATTRS_REPORT = ATTRS_REPORT;
1360 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1361 } else if (!am_server) {
1362 itemizing = stdout_format_has_i;
1363 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1364 code = itemizing ? 0 : FINFO;
1367 maybe_ATTRS_REPORT = ATTRS_REPORT;
1372 rprintf(FINFO, "generator starting pid=%ld count=%d\n",
1373 (long)getpid(), flist->count);
1376 if (delete_before && !local_name && flist->count > 0)
1377 do_delete_pass(flist);
1380 if (append_mode || whole_file < 0)
1383 rprintf(FINFO, "delta-transmission %s\n",
1385 ? "disabled for local transfer or --whole-file"
1389 /* Since we often fill up the outgoing socket and then just sit around
1390 * waiting for the other 2 processes to do their thing, we don't want
1391 * to exit on a timeout. If the data stops flowing, the receiver will
1392 * notice that and let us know via the redo pipe (or its closing). */
1395 for (i = 0; i < flist->count; i++) {
1396 struct file_struct *file = flist->files[i];
1398 if (!file->basename)
1402 strlcpy(fbuf, local_name, sizeof fbuf);
1405 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1408 /* We need to ensure that any dirs we create have writeable
1409 * permissions during the time we are putting files within
1410 * them. This is then fixed after the transfer is done. */
1412 if (!am_root && S_ISDIR(file->mode) && !(file->mode & S_IWUSR)
1414 mode_t mode = file->mode | S_IWUSR; /* user write */
1415 char *fname = local_name ? local_name : fbuf;
1416 if (do_chmod(fname, mode) < 0) {
1417 rsyserr(FERROR, errno,
1418 "failed to modify permissions on %s",
1421 need_retouch_dir_perms = 1;
1425 if (preserve_hard_links)
1426 check_for_finished_hlinks(itemizing, code);
1428 if (allowed_lull && !(i % lull_mod))
1429 maybe_send_keepalive();
1430 else if (!(i % 200))
1431 maybe_flush_socket();
1433 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1435 delete_in_dir(NULL, NULL, NULL, NULL);
1438 csum_length = SUM_LENGTH;
1439 max_size = min_size = ignore_existing = ignore_non_existing = 0;
1440 update_only = always_checksum = size_only = 0;
1442 if (append_mode) /* resend w/o append mode */
1443 append_mode = -1; /* ... but only longer files */
1444 make_backups = 0; /* avoid a duplicate backup for inplace processing */
1447 rprintf(FINFO,"generate_files phase=%d\n",phase);
1449 write_int(f_out, -1);
1451 /* files can cycle through the system more than once
1452 * to catch initial checksum errors */
1453 while ((i = get_redo_num(itemizing, code)) != -1) {
1454 struct file_struct *file = flist->files[i];
1456 strlcpy(fbuf, local_name, sizeof fbuf);
1459 recv_generator(fbuf, file, i, itemizing, maybe_ATTRS_REPORT,
1464 ignore_non_existing = save_ignore_non_existing;
1465 ignore_existing = save_ignore_existing;
1466 make_backups = save_make_backups;
1469 rprintf(FINFO,"generate_files phase=%d\n",phase);
1471 write_int(f_out, -1);
1472 /* Reduce round-trip lag-time for a useless delay-updates phase. */
1473 if (protocol_version >= 29 && !delay_updates)
1474 write_int(f_out, -1);
1476 /* Read MSG_DONE for the redo phase (and any prior messages). */
1477 get_redo_num(itemizing, code);
1479 if (protocol_version >= 29) {
1482 rprintf(FINFO, "generate_files phase=%d\n", phase);
1484 write_int(f_out, -1);
1485 /* Read MSG_DONE for delay-updates phase & prior messages. */
1486 get_redo_num(itemizing, code);
1489 do_progress = save_do_progress;
1490 if (delete_after && !local_name && flist->count > 0)
1491 do_delete_pass(flist);
1493 if ((need_retouch_dir_perms || need_retouch_dir_times) && dir_tweaking) {
1495 /* Now we need to fix any directory permissions that were
1496 * modified during the transfer and/or re-set any tweaked
1497 * modified-time values. */
1498 for (i = 0; i < flist->count; i++) {
1499 struct file_struct *file = flist->files[i];
1501 if (!file->basename || !S_ISDIR(file->mode))
1503 if (!need_retouch_dir_times && file->mode & S_IWUSR)
1505 if (file->flags & FLAG_MISSING) {
1506 int missing = file->dir.depth;
1507 while (++i < flist->count) {
1508 file = flist->files[i];
1509 if (file->dir.depth <= missing)
1515 recv_generator(f_name(file, NULL), file, i, itemizing,
1516 maybe_ATTRS_REPORT, code, -1);
1517 if (allowed_lull && !(++j % lull_mod))
1518 maybe_send_keepalive();
1519 else if (!(j % 200))
1520 maybe_flush_socket();
1523 recv_generator(NULL, NULL, 0, 0, 0, code, -1);
1525 if (max_delete > 0 && deletion_count > max_delete) {
1527 "Deletions stopped due to --max-delete limit (%d skipped)\n",
1528 deletion_count - max_delete);
1529 io_error |= IOERR_DEL_LIMIT;
1533 rprintf(FINFO,"generate_files finished\n");