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[rsync.git] / generator.c
blobdba97d85451d9f9324102edbee5f015eb61e5517
1 /*
2 * Routines that are exclusive to the generator process.
3 *
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) 2003-2020 Wayne Davison
8 *
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 3 of the License, or
12 * (at your option) any later version.
13 *
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.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, visit the http://fsf.org website.
21 */
22
23 #include "rsync.h"
24 #include "inums.h"
25 #include "ifuncs.h"
26
27 extern int dry_run;
28 extern int do_xfers;
29 extern int stdout_format_has_i;
30 extern int logfile_format_has_i;
31 extern int am_root;
32 extern int am_server;
33 extern int am_daemon;
34 extern int inc_recurse;
35 extern int relative_paths;
36 extern int implied_dirs;
37 extern int keep_dirlinks;
38 extern int preserve_acls;
39 extern int preserve_xattrs;
40 extern int preserve_links;
41 extern int preserve_devices;
42 extern int write_devices;
43 extern int preserve_specials;
44 extern int preserve_hard_links;
45 extern int preserve_executability;
46 extern int preserve_perms;
47 extern int preserve_times;
48 extern int delete_mode;
49 extern int delete_before;
50 extern int delete_during;
51 extern int delete_after;
52 extern int missing_args;
53 extern int msgdone_cnt;
54 extern int ignore_errors;
55 extern int remove_source_files;
56 extern int delay_updates;
57 extern int update_only;
58 extern int human_readable;
59 extern int ignore_existing;
60 extern int ignore_non_existing;
61 extern int want_xattr_optim;
62 extern int inplace;
63 extern int append_mode;
64 extern int make_backups;
65 extern int csum_length;
66 extern int ignore_times;
67 extern int size_only;
68 extern OFF_T max_size;
69 extern OFF_T min_size;
70 extern int io_error;
71 extern int flist_eof;
72 extern int allowed_lull;
73 extern int sock_f_out;
74 extern int protocol_version;
75 extern int file_total;
76 extern int fuzzy_basis;
77 extern int always_checksum;
78 extern int flist_csum_len;
79 extern char *partial_dir;
80 extern int compare_dest;
81 extern int copy_dest;
82 extern int link_dest;
83 extern int whole_file;
84 extern int list_only;
85 extern int read_batch;
86 extern int write_batch;
87 extern int safe_symlinks;
88 extern long block_size; /* "long" because popt can't set an int32. */
89 extern int unsort_ndx;
90 extern int max_delete;
91 extern int force_delete;
92 extern int one_file_system;
93 extern int skipped_deletes;
94 extern dev_t filesystem_dev;
95 extern mode_t orig_umask;
96 extern uid_t our_uid;
97 extern char *tmpdir;
98 extern char *basis_dir[MAX_BASIS_DIRS+1];
99 extern struct file_list *cur_flist, *first_flist, *dir_flist;
100 extern filter_rule_list filter_list, daemon_filter_list;
101
102 int maybe_ATTRS_REPORT = 0;
103 int maybe_ATTRS_SET_NANO = 0;
104
105 static dev_t dev_zero;
106 static int deldelay_size = 0, deldelay_cnt = 0;
107 static char *deldelay_buf = NULL;
108 static int deldelay_fd = -1;
109 static int loopchk_limit;
110 static int dir_tweaking;
111 static int symlink_timeset_failed_flags;
112 static int need_retouch_dir_times;
113 static int need_retouch_dir_perms;
114 static const char *solo_file = NULL;
115
116 enum nonregtype {
117 TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
118 };
119
120 /* Forward declarations. */
121 #ifdef SUPPORT_HARD_LINKS
122 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
123 enum logcode code, int f_out);
124 #endif
125
126 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
127 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
128
129 static int start_delete_delay_temp(void)
130 {
131 char fnametmp[MAXPATHLEN];
132 int save_dry_run = dry_run;
133
134 dry_run = 0;
135 if (!get_tmpname(fnametmp, "deldelay", False)
136 || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
137 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
138 inc_recurse ? "" : " -- switching to --delete-after");
139 delete_during = 0;
140 delete_after = !inc_recurse;
141 dry_run = save_dry_run;
142 return 0;
143 }
144 unlink(fnametmp);
145 dry_run = save_dry_run;
146 return 1;
147 }
148
149 static int flush_delete_delay(void)
150 {
151 if (deldelay_fd < 0 && !start_delete_delay_temp())
152 return 0;
153 if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
154 rsyserr(FERROR, errno, "flush of delete-delay buffer");
155 delete_during = 0;
156 delete_after = !inc_recurse;
157 close(deldelay_fd);
158 return 0;
159 }
160 deldelay_cnt = 0;
161 return 1;
162 }
163
164 static int remember_delete(struct file_struct *file, const char *fname, int flags)
165 {
166 int len;
167
168 if (deldelay_cnt == deldelay_size && !flush_delete_delay())
169 return 0;
170
171 if (flags & DEL_NO_UID_WRITE)
172 deldelay_buf[deldelay_cnt++] = '!';
173
174 while (1) {
175 len = snprintf(deldelay_buf + deldelay_cnt,
176 deldelay_size - deldelay_cnt,
177 "%x %s%c",
178 (int)file->mode, fname, '\0');
179 if ((deldelay_cnt += len) <= deldelay_size)
180 break;
181 deldelay_cnt -= len;
182 if (!flush_delete_delay())
183 return 0;
184 }
185
186 return 1;
187 }
188
189 static int read_delay_line(char *buf, int *flags_p)
190 {
191 static int read_pos = 0;
192 int j, len, mode;
193 char *bp, *past_space;
194
195 while (1) {
196 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
197 if (j < deldelay_cnt)
198 break;
199 if (deldelay_fd < 0) {
200 if (j > read_pos)
201 goto invalid_data;
202 return -1;
203 }
204 deldelay_cnt -= read_pos;
205 if (deldelay_cnt == deldelay_size)
206 goto invalid_data;
207 if (deldelay_cnt && read_pos) {
208 memmove(deldelay_buf, deldelay_buf + read_pos,
209 deldelay_cnt);
210 }
211 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
212 deldelay_size - deldelay_cnt);
213 if (len == 0) {
214 if (deldelay_cnt) {
215 rprintf(FERROR,
216 "ERROR: unexpected EOF in delete-delay file.\n");
217 }
218 return -1;
219 }
220 if (len < 0) {
221 rsyserr(FERROR, errno,
222 "reading delete-delay file");
223 return -1;
224 }
225 deldelay_cnt += len;
226 read_pos = 0;
227 }
228
229 bp = deldelay_buf + read_pos;
230 if (*bp == '!') {
231 bp++;
232 *flags_p = DEL_NO_UID_WRITE;
233 } else
234 *flags_p = 0;
235
236 if (sscanf(bp, "%x ", &mode) != 1) {
237 invalid_data:
238 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
239 return -1;
240 }
241 past_space = strchr(bp, ' ') + 1;
242 len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
243 read_pos = j + 1;
244
245 if (len > MAXPATHLEN) {
246 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
247 return -1;
248 }
249
250 /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
251 * instead of returning a pointer to our buffer. */
252 memcpy(buf, past_space, len);
253
254 return mode;
255 }
256
257 static void do_delayed_deletions(char *delbuf)
258 {
259 int mode, flags;
260
261 if (deldelay_fd >= 0) {
262 if (deldelay_cnt && !flush_delete_delay())
263 return;
264 lseek(deldelay_fd, 0, 0);
265 }
266 while ((mode = read_delay_line(delbuf, &flags)) >= 0)
267 delete_item(delbuf, mode, flags | DEL_RECURSE);
268 if (deldelay_fd >= 0)
269 close(deldelay_fd);
270 }
271
272 /* This function is used to implement per-directory deletion, and is used by
273 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
274 * MAXPATHLEN buffer with the name of the directory in it (the functions we
275 * call will append names onto the end, but the old dir value will be restored
276 * on exit). */
277 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
278 {
279 static int already_warned = 0;
280 struct file_list *dirlist;
281 char delbuf[MAXPATHLEN];
282 int dlen, i;
283
284 if (!fbuf) {
285 change_local_filter_dir(NULL, 0, 0);
286 return;
287 }
288
289 if (DEBUG_GTE(DEL, 2))
290 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
291
292 if (allowed_lull)
293 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
294
295 if (io_error & IOERR_GENERAL && !ignore_errors) {
296 if (already_warned)
297 return;
298 rprintf(FINFO,
299 "IO error encountered -- skipping file deletion\n");
300 already_warned = 1;
301 return;
302 }
303
304 dlen = strlen(fbuf);
305 change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
306
307 if (one_file_system) {
308 if (file->flags & FLAG_TOP_DIR)
309 filesystem_dev = *fs_dev;
310 else if (filesystem_dev != *fs_dev)
311 return;
312 }
313
314 dirlist = get_dirlist(fbuf, dlen, 0);
315
316 /* If an item in dirlist is not found in flist, delete it
317 * from the filesystem. */
318 for (i = dirlist->used; i--; ) {
319 struct file_struct *fp = dirlist->files[i];
320 if (!F_IS_ACTIVE(fp))
321 continue;
322 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
323 if (INFO_GTE(MOUNT, 1))
324 rprintf(FINFO, "cannot delete mount point: %s\n",
325 f_name(fp, NULL));
326 continue;
327 }
328 /* Here we want to match regardless of file type. Replacement
329 * of a file with one of another type is handled separately by
330 * a delete_item call with a DEL_MAKE_ROOM flag. */
331 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
332 int flags = DEL_RECURSE;
333 if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
334 flags |= DEL_NO_UID_WRITE;
335 f_name(fp, delbuf);
336 if (delete_during == 2) {
337 if (!remember_delete(fp, delbuf, flags))
338 break;
339 } else
340 delete_item(delbuf, fp->mode, flags);
341 }
342 }
343
344 flist_free(dirlist);
345 }
346
347 /* This deletes any files on the receiving side that are not present on the
348 * sending side. This is used by --delete-before and --delete-after. */
349 static void do_delete_pass(void)
350 {
351 char fbuf[MAXPATHLEN];
352 STRUCT_STAT st;
353 int j;
354
355 /* dry_run is incremented when the destination doesn't exist yet. */
356 if (dry_run > 1 || list_only)
357 return;
358
359 for (j = 0; j < cur_flist->used; j++) {
360 struct file_struct *file = cur_flist->sorted[j];
361
362 if (!F_IS_ACTIVE(file))
363 continue;
364
365 f_name(file, fbuf);
366
367 if (!(file->flags & FLAG_CONTENT_DIR)) {
368 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
369 continue;
370 }
371
372 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
373 rprintf(FINFO, "deleting in %s\n", fbuf);
374
375 if (link_stat(fbuf, &st, keep_dirlinks) < 0
376 || !S_ISDIR(st.st_mode))
377 continue;
378
379 delete_in_dir(fbuf, file, &st.st_dev);
380 }
381 delete_in_dir(NULL, NULL, &dev_zero);
382
383 if (INFO_GTE(FLIST, 2) && !am_server)
384 rprintf(FINFO, " \r");
385 }
386
387 static inline int time_diff(STRUCT_STAT *stp, struct file_struct *file)
388 {
389 #ifdef ST_MTIME_NSEC
390 return cmp_time(stp->st_mtime, stp->ST_MTIME_NSEC, file->modtime, F_MOD_NSEC_or_0(file));
391 #else
392 return cmp_time(stp->st_mtime, 0L, file->modtime, 0L);
393 #endif
394 }
395
396 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
397 {
398 if (preserve_perms)
399 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
400
401 if (preserve_executability)
402 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
403
404 return 0;
405 }
406
407 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
408 {
409 if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
410 return 1;
411
412 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
413 return 1;
414
415 return 0;
416 }
417
418 #ifdef SUPPORT_ACLS
419 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
420 {
421 if (preserve_acls) {
422 if (!ACL_READY(*sxp))
423 get_acl(fname, sxp);
424 if (set_acl(NULL, file, sxp, file->mode))
425 return 1;
426 }
427
428 return 0;
429 }
430 #endif
431
432 #ifdef SUPPORT_XATTRS
433 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
434 {
435 if (preserve_xattrs) {
436 if (!XATTR_READY(*sxp))
437 get_xattr(fname, sxp);
438 if (xattr_diff(file, sxp, 0))
439 return 1;
440 }
441
442 return 0;
443 }
444 #endif
445
446 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
447 {
448 if (S_ISLNK(file->mode)) {
449 #ifdef CAN_SET_SYMLINK_TIMES
450 if (preserve_times & PRESERVE_LINK_TIMES && time_diff(&sxp->st, file))
451 return 0;
452 #endif
453 #ifdef CAN_CHMOD_SYMLINK
454 if (perms_differ(file, sxp))
455 return 0;
456 #endif
457 #ifdef CAN_CHOWN_SYMLINK
458 if (ownership_differs(file, sxp))
459 return 0;
460 #endif
461 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
462 if (acls_differ(fname, file, sxp))
463 return 0;
464 #endif
465 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
466 if (xattrs_differ(fname, file, sxp))
467 return 0;
468 #endif
469 } else {
470 if (preserve_times && time_diff(&sxp->st, file))
471 return 0;
472 if (perms_differ(file, sxp))
473 return 0;
474 if (ownership_differs(file, sxp))
475 return 0;
476 #ifdef SUPPORT_ACLS
477 if (acls_differ(fname, file, sxp))
478 return 0;
479 #endif
480 #ifdef SUPPORT_XATTRS
481 if (xattrs_differ(fname, file, sxp))
482 return 0;
483 #endif
484 }
485
486 return 1;
487 }
488
489 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
490 stat_x *sxp, int32 iflags, uchar fnamecmp_type,
491 const char *xname)
492 {
493 if (statret >= 0) { /* A from-dest-dir statret can == 1! */
494 int keep_time = !preserve_times ? 0
495 : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
496 : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
497 : 1;
498
499 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
500 iflags |= ITEM_REPORT_SIZE;
501 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
502 if (iflags & ITEM_LOCAL_CHANGE)
503 iflags |= symlink_timeset_failed_flags;
504 } else if (keep_time
505 ? time_diff(&sxp->st, file)
506 : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
507 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
508 iflags |= ITEM_REPORT_TIME;
509 if (atimes_ndx && !S_ISDIR(file->mode) && !S_ISLNK(file->mode)
510 && cmp_time(F_ATIME(file), 0, sxp->st.st_atime, 0) != 0)
511 iflags |= ITEM_REPORT_ATIME;
512 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
513 if (S_ISLNK(file->mode)) {
514 ;
515 } else
516 #endif
517 if (preserve_perms) {
518 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
519 iflags |= ITEM_REPORT_PERMS;
520 } else if (preserve_executability
521 && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
522 iflags |= ITEM_REPORT_PERMS;
523 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
524 iflags |= ITEM_REPORT_OWNER;
525 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
526 && sxp->st.st_gid != (gid_t)F_GROUP(file))
527 iflags |= ITEM_REPORT_GROUP;
528 #ifdef SUPPORT_ACLS
529 if (preserve_acls && !S_ISLNK(file->mode)) {
530 if (!ACL_READY(*sxp))
531 get_acl(fnamecmp, sxp);
532 if (set_acl(NULL, file, sxp, file->mode))
533 iflags |= ITEM_REPORT_ACL;
534 }
535 #endif
536 #ifdef SUPPORT_XATTRS
537 if (preserve_xattrs) {
538 if (!XATTR_READY(*sxp))
539 get_xattr(fnamecmp, sxp);
540 if (xattr_diff(file, sxp, 1))
541 iflags |= ITEM_REPORT_XATTR;
542 }
543 #endif
544 } else {
545 #ifdef SUPPORT_XATTRS
546 if (preserve_xattrs && xattr_diff(file, NULL, 1))
547 iflags |= ITEM_REPORT_XATTR;
548 #endif
549 iflags |= ITEM_IS_NEW;
550 }
551
552 iflags &= 0xffff;
553 if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
554 || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
555 if (protocol_version >= 29) {
556 if (ndx >= 0)
557 write_ndx(sock_f_out, ndx);
558 write_shortint(sock_f_out, iflags);
559 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
560 write_byte(sock_f_out, fnamecmp_type);
561 if (iflags & ITEM_XNAME_FOLLOWS)
562 write_vstring(sock_f_out, xname, strlen(xname));
563 #ifdef SUPPORT_XATTRS
564 if (preserve_xattrs && do_xfers
565 && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
566 int fd = iflags & ITEM_REPORT_XATTR
567 && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
568 ? sock_f_out : -1;
569 send_xattr_request(NULL, file, fd);
570 }
571 #endif
572 } else if (ndx >= 0) {
573 enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
574 log_item(code, file, iflags, xname);
575 }
576 }
577 }
578
579
580 /* Perform our quick-check heuristic for determining if a file is unchanged. */
581 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
582 {
583 if (st->st_size != F_LENGTH(file))
584 return 0;
585
586 /* if always checksum is set then we use the checksum instead
587 of the file time to determine whether to sync */
588 if (always_checksum > 0 && S_ISREG(st->st_mode)) {
589 char sum[MAX_DIGEST_LEN];
590 file_checksum(fn, st, sum);
591 return memcmp(sum, F_SUM(file), flist_csum_len) == 0;
592 }
593
594 if (size_only > 0)
595 return 1;
596
597 if (ignore_times)
598 return 0;
599
600 return time_diff(st, file) == 0;
601 }
602
603
604 /*
605 * set (initialize) the size entries in the per-file sum_struct
606 * calculating dynamic block and checksum sizes.
607 *
608 * This is only called from generate_and_send_sums() but is a separate
609 * function to encapsulate the logic.
610 *
611 * The block size is a rounded square root of file length.
612 *
613 * The checksum size is determined according to:
614 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
615 * provided by Donovan Baarda which gives a probability of rsync
616 * algorithm corrupting data and falling back using the whole md4
617 * checksums.
618 *
619 * This might be made one of several selectable heuristics.
620 */
621 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
622 {
623 int32 blength;
624 int s2length;
625 int64 l;
626
627 if (len < 0) {
628 /* The file length overflowed our int64 var, so we can't process this file. */
629 sum->count = -1; /* indicate overflow error */
630 return;
631 }
632
633 if (block_size)
634 blength = block_size;
635 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
636 blength = BLOCK_SIZE;
637 else {
638 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
639 int32 c;
640 int cnt;
641 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
642 if (c < 0 || c >= max_blength)
643 blength = max_blength;
644 else {
645 blength = 0;
646 do {
647 blength |= c;
648 if (len < (int64)blength * blength)
649 blength &= ~c;
650 c >>= 1;
651 } while (c >= 8); /* round to multiple of 8 */
652 blength = MAX(blength, BLOCK_SIZE);
653 }
654 }
655
656 if (protocol_version < 27) {
657 s2length = csum_length;
658 } else if (csum_length == SUM_LENGTH) {
659 s2length = SUM_LENGTH;
660 } else {
661 int32 c;
662 int b = BLOCKSUM_BIAS;
663 for (l = len; l >>= 1; b += 2) {}
664 for (c = blength; (c >>= 1) && b; b--) {}
665 /* add a bit, subtract rollsum, round up. */
666 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
667 s2length = MAX(s2length, csum_length);
668 s2length = MIN(s2length, SUM_LENGTH);
669 }
670
671 sum->flength = len;
672 sum->blength = blength;
673 sum->s2length = s2length;
674 sum->remainder = (int32)(len % blength);
675 sum->count = (int32)(l = (len / blength) + (sum->remainder != 0));
676
677 if ((int64)sum->count != l)
678 sum->count = -1;
679
680 if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
681 rprintf(FINFO,
682 "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
683 big_num(sum->count), (long)sum->remainder, (long)sum->blength,
684 sum->s2length, big_num(sum->flength));
685 }
686 }
687
688
689 /*
690 * Generate and send a stream of signatures/checksums that describe a buffer
691 *
692 * Generate approximately one checksum every block_len bytes.
693 */
694 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
695 {
696 int32 i;
697 struct map_struct *mapbuf;
698 struct sum_struct sum;
699 OFF_T offset = 0;
700
701 sum_sizes_sqroot(&sum, len);
702 if (sum.count < 0)
703 return -1;
704 write_sum_head(f_out, &sum);
705
706 if (append_mode > 0 && f_copy < 0)
707 return 0;
708
709 if (len > 0)
710 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
711 else
712 mapbuf = NULL;
713
714 for (i = 0; i < sum.count; i++) {
715 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
716 char *map = map_ptr(mapbuf, offset, n1);
717 char sum2[SUM_LENGTH];
718 uint32 sum1;
719
720 len -= n1;
721 offset += n1;
722
723 if (f_copy >= 0) {
724 full_write(f_copy, map, n1);
725 if (append_mode > 0)
726 continue;
727 }
728
729 sum1 = get_checksum1(map, n1);
730 get_checksum2(map, n1, sum2);
731
732 if (DEBUG_GTE(DELTASUM, 3)) {
733 rprintf(FINFO,
734 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
735 big_num(i), big_num(offset - n1), (long)n1,
736 (unsigned long)sum1);
737 }
738 write_int(f_out, sum1);
739 write_buf(f_out, sum2, sum.s2length);
740 }
741
742 if (mapbuf)
743 unmap_file(mapbuf);
744
745 return 0;
746 }
747
748
749 /* Try to find a filename in the same dir as "fname" with a similar name. */
750 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
751 {
752 int fname_len, fname_suf_len;
753 const char *fname_suf, *fname = file->basename;
754 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
755 int i, j;
756 struct file_struct *lowest_fp = NULL;
757
758 fname_len = strlen(fname);
759 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
760
761 /* Try to find an exact size+mtime match first. */
762 for (i = 0; i < fuzzy_basis; i++) {
763 struct file_list *dirlist = dirlist_array[i];
764
765 if (!dirlist)
766 continue;
767
768 for (j = 0; j < dirlist->used; j++) {
769 struct file_struct *fp = dirlist->files[j];
770
771 if (!F_IS_ACTIVE(fp))
772 continue;
773
774 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
775 continue;
776
777 if (F_LENGTH(fp) == F_LENGTH(file) && cmp_time(fp->modtime, 0L, file->modtime, 0L) == 0) {
778 if (DEBUG_GTE(FUZZY, 2))
779 rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
780 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
781 return fp;
782 }
783
784 }
785 }
786
787 for (i = 0; i < fuzzy_basis; i++) {
788 struct file_list *dirlist = dirlist_array[i];
789
790 if (!dirlist)
791 continue;
792
793 for (j = 0; j < dirlist->used; j++) {
794 struct file_struct *fp = dirlist->files[j];
795 const char *suf, *name;
796 int len, suf_len;
797 uint32 dist;
798
799 if (!F_IS_ACTIVE(fp))
800 continue;
801
802 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
803 continue;
804
805 name = fp->basename;
806 len = strlen(name);
807 suf = find_filename_suffix(name, len, &suf_len);
808
809 dist = fuzzy_distance(name, len, fname, fname_len);
810 /* Add some extra weight to how well the suffixes match. */
811 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
812 if (DEBUG_GTE(FUZZY, 2)) {
813 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
814 f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
815 }
816 if (dist <= lowest_dist) {
817 lowest_dist = dist;
818 lowest_fp = fp;
819 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
820 }
821 }
822 }
823
824 return lowest_fp;
825 }
826
827 /* Copy a file found in our --copy-dest handling. */
828 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
829 {
830 char buf[MAXPATHLEN];
831 const char *copy_to, *partialptr;
832 int save_preserve_xattrs = preserve_xattrs;
833 int ok, fd_w;
834
835 if (inplace) {
836 /* Let copy_file open the destination in place. */
837 fd_w = -1;
838 copy_to = dest;
839 } else {
840 fd_w = open_tmpfile(buf, dest, file);
841 if (fd_w < 0)
842 return -1;
843 copy_to = buf;
844 }
845 cleanup_set(copy_to, NULL, NULL, -1, -1);
846 if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
847 if (INFO_GTE(COPY, 1)) {
848 rsyserr(FINFO, errno, "copy_file %s => %s",
849 full_fname(src), copy_to);
850 }
851 /* Try to clean up. */
852 unlink(copy_to);
853 cleanup_disable();
854 return -1;
855 }
856 partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
857 preserve_xattrs = 0; /* xattrs were copied with file */
858 ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
859 preserve_xattrs = save_preserve_xattrs;
860 cleanup_disable();
861 return ok ? 0 : -1;
862 }
863
864 /* This is only called for regular files. We return -2 if we've finished
865 * handling the file, -1 if no dest-linking occurred, or a non-negative
866 * value if we found an alternate basis file. If we're called with the
867 * find_exact_for_existing flag, the destination file already exists, so
868 * we only try to find an exact alt-dest match. In this case, the returns
869 * are only -2 & -1 (both as above). */
870 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
871 char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
872 int itemizing, enum logcode code)
873 {
874 STRUCT_STAT real_st = sxp->st;
875 int best_match = -1;
876 int match_level = 0;
877 int j = 0;
878
879 do {
880 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
881 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
882 continue;
883 if (match_level == 0) {
884 best_match = j;
885 match_level = 1;
886 }
887 if (!unchanged_file(cmpbuf, file, &sxp->st))
888 continue;
889 if (match_level == 1) {
890 best_match = j;
891 match_level = 2;
892 }
893 if (unchanged_attrs(cmpbuf, file, sxp)) {
894 best_match = j;
895 match_level = 3;
896 break;
897 }
898 free_stat_x(sxp);
899 } while (basis_dir[++j] != NULL);
900
901 if (!match_level)
902 goto got_nothing_for_ya;
903
904 if (j != best_match) {
905 j = best_match;
906 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
907 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
908 goto got_nothing_for_ya;
909 }
910
911 if (match_level == 3 && !copy_dest) {
912 if (find_exact_for_existing) {
913 if (link_dest && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
914 return -1;
915 if (do_unlink(fname) < 0 && errno != ENOENT)
916 goto got_nothing_for_ya;
917 }
918 #ifdef SUPPORT_HARD_LINKS
919 if (link_dest) {
920 if (!hard_link_one(file, fname, cmpbuf, 1))
921 goto try_a_copy;
922 if (atimes_ndx)
923 set_file_attrs(fname, file, sxp, NULL, 0);
924 if (preserve_hard_links && F_IS_HLINKED(file))
925 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
926 if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
927 itemize(cmpbuf, file, ndx, 1, sxp,
928 ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
929 0, "");
930 }
931 } else
932 #endif
933 {
934 if (itemizing)
935 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
936 }
937 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
938 rprintf(FCLIENT, "%s is uptodate\n", fname);
939 return -2;
940 }
941
942 if (find_exact_for_existing)
943 goto got_nothing_for_ya;
944
945 if (match_level >= 2) {
946 #ifdef SUPPORT_HARD_LINKS
947 try_a_copy: /* Copy the file locally. */
948 #endif
949 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
950 if (find_exact_for_existing) /* Can get here via hard-link failure */
951 goto got_nothing_for_ya;
952 return -1;
953 }
954 if (itemizing)
955 itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
956 if (maybe_ATTRS_REPORT
957 && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
958 || (INFO_GTE(NAME, 2) && match_level == 3))) {
959 code = match_level == 3 ? FCLIENT : FINFO;
960 rprintf(code, "%s%s\n", fname,
961 match_level == 3 ? " is uptodate" : "");
962 }
963 #ifdef SUPPORT_HARD_LINKS
964 if (preserve_hard_links && F_IS_HLINKED(file))
965 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
966 #endif
967 return -2;
968 }
969
970 return FNAMECMP_BASIS_DIR_LOW + j;
971
972 got_nothing_for_ya:
973 sxp->st = real_st;
974 return -1;
975 }
976
977 /* This is only called for non-regular files. We return -2 if we've finished
978 * handling the file, or -1 if no dest-linking occurred, or a non-negative
979 * value if we found an alternate basis file. */
980 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
981 char *cmpbuf, stat_x *sxp, int itemizing,
982 enum logcode code)
983 {
984 int best_match = -1;
985 int match_level = 0;
986 enum nonregtype type;
987 uint32 *devp;
988 #ifdef SUPPORT_LINKS
989 char lnk[MAXPATHLEN];
990 int len;
991 #endif
992 int j = 0;
993
994 #ifndef SUPPORT_LINKS
995 if (S_ISLNK(file->mode))
996 return -1;
997 #endif
998 if (S_ISDIR(file->mode)) {
999 type = TYPE_DIR;
1000 } else if (IS_SPECIAL(file->mode))
1001 type = TYPE_SPECIAL;
1002 else if (IS_DEVICE(file->mode))
1003 type = TYPE_DEVICE;
1004 #ifdef SUPPORT_LINKS
1005 else if (S_ISLNK(file->mode))
1006 type = TYPE_SYMLINK;
1007 #endif
1008 else {
1009 rprintf(FERROR,
1010 "internal: try_dests_non() called with invalid mode (%o)\n",
1011 (int)file->mode);
1012 exit_cleanup(RERR_UNSUPPORTED);
1013 }
1014
1015 do {
1016 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1017 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1018 continue;
1019 switch (type) {
1020 case TYPE_DIR:
1021 if (!S_ISDIR(sxp->st.st_mode))
1022 continue;
1023 break;
1024 case TYPE_SPECIAL:
1025 if (!IS_SPECIAL(sxp->st.st_mode))
1026 continue;
1027 break;
1028 case TYPE_DEVICE:
1029 if (!IS_DEVICE(sxp->st.st_mode))
1030 continue;
1031 break;
1032 case TYPE_SYMLINK:
1033 #ifdef SUPPORT_LINKS
1034 if (!S_ISLNK(sxp->st.st_mode))
1035 continue;
1036 break;
1037 #else
1038 return -1;
1039 #endif
1040 }
1041 if (match_level < 1) {
1042 match_level = 1;
1043 best_match = j;
1044 }
1045 switch (type) {
1046 case TYPE_DIR:
1047 case TYPE_SPECIAL:
1048 break;
1049 case TYPE_DEVICE:
1050 devp = F_RDEV_P(file);
1051 if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1052 continue;
1053 break;
1054 case TYPE_SYMLINK:
1055 #ifdef SUPPORT_LINKS
1056 if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1057 continue;
1058 lnk[len] = '\0';
1059 if (strcmp(lnk, F_SYMLINK(file)) != 0)
1060 continue;
1061 break;
1062 #else
1063 return -1;
1064 #endif
1065 }
1066 if (match_level < 2) {
1067 match_level = 2;
1068 best_match = j;
1069 }
1070 if (unchanged_attrs(cmpbuf, file, sxp)) {
1071 match_level = 3;
1072 best_match = j;
1073 break;
1074 }
1075 } while (basis_dir[++j] != NULL);
1076
1077 if (!match_level)
1078 return -1;
1079
1080 if (j != best_match) {
1081 j = best_match;
1082 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1083 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1084 return -1;
1085 }
1086
1087 if (match_level == 3) {
1088 #ifdef SUPPORT_HARD_LINKS
1089 if (link_dest
1090 #ifndef CAN_HARDLINK_SYMLINK
1091 && !S_ISLNK(file->mode)
1092 #endif
1093 #ifndef CAN_HARDLINK_SPECIAL
1094 && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1095 #endif
1096 && !S_ISDIR(file->mode)) {
1097 if (do_link(cmpbuf, fname) < 0) {
1098 rsyserr(FERROR_XFER, errno,
1099 "failed to hard-link %s with %s",
1100 cmpbuf, fname);
1101 return j;
1102 }
1103 if (preserve_hard_links && F_IS_HLINKED(file))
1104 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1105 } else
1106 #endif
1107 match_level = 2;
1108 if (itemizing && stdout_format_has_i
1109 && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1110 int chg = compare_dest && type != TYPE_DIR ? 0
1111 : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1112 char *lp = match_level == 3 ? "" : NULL;
1113 itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1114 }
1115 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1116 rprintf(FCLIENT, "%s%s is uptodate\n",
1117 fname, type == TYPE_DIR ? "/" : "");
1118 }
1119 return -2;
1120 }
1121
1122 return j;
1123 }
1124
1125 static void list_file_entry(struct file_struct *f)
1126 {
1127 char permbuf[PERMSTRING_SIZE];
1128 const char *mtime_str = timestring(f->modtime);
1129 int size_width = human_readable ? 14 : 11;
1130 int mtime_width = 1 + strlen(mtime_str);
1131 int atime_width = atimes_ndx ? mtime_width : 0;
1132
1133 if (!F_IS_ACTIVE(f)) {
1134 /* this can happen if duplicate names were removed */
1135 return;
1136 }
1137
1138 /* TODO: indicate '+' if the entry has an ACL. */
1139
1140 if (missing_args == 2 && f->mode == 0) {
1141 rprintf(FINFO, "%-*s %s\n",
1142 10 + 1 + size_width + mtime_width + atime_width, "*missing",
1143 f_name(f, NULL));
1144 } else {
1145 const char *atime_str = atimes_ndx && !S_ISDIR(f->mode) ? timestring(F_ATIME(f)) : "";
1146 const char *arrow, *lnk;
1147
1148 permstring(permbuf, f->mode);
1149
1150 #ifdef SUPPORT_LINKS
1151 if (preserve_links && S_ISLNK(f->mode)) {
1152 arrow = " -> ";
1153 lnk = F_SYMLINK(f);
1154 } else
1155 #endif
1156 arrow = lnk = "";
1157
1158 rprintf(FINFO, "%s %*s %s%*s %s%s%s\n",
1159 permbuf, size_width, human_num(F_LENGTH(f)),
1160 timestring(f->modtime), atime_width, atime_str,
1161 f_name(f, NULL), arrow, lnk);
1162 }
1163 }
1164
1165 static int phase = 0;
1166 static int dflt_perms;
1167
1168 static int implied_dirs_are_missing;
1169 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1170 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1171 {
1172 return F_DEPTH(file) > F_DEPTH(subtree)
1173 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1174 }
1175
1176 /* Acts on the indicated item in cur_flist whose name is fname. If a dir,
1177 * make sure it exists, and has the right permissions/timestamp info. For
1178 * all other non-regular files (symlinks, etc.) we create them here. For
1179 * regular files that have changed, we try to find a basis file and then
1180 * start sending checksums. The ndx is the file's unique index value.
1181 *
1182 * The fname parameter must point to a MAXPATHLEN buffer! (e.g it gets
1183 * passed to delete_item(), which can use it during a recursive delete.)
1184 *
1185 * Note that f_out is set to -1 when doing final directory-permission and
1186 * modification-time repair. */
1187 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1188 int itemizing, enum logcode code, int f_out)
1189 {
1190 static const char *parent_dirname = "";
1191 static struct file_struct *prior_dir_file = NULL;
1192 /* Missing dir not created due to --dry-run; will still be scanned. */
1193 static struct file_struct *dry_missing_dir = NULL;
1194 /* Missing dir whose contents are skipped altogether due to
1195 * --ignore-non-existing, daemon exclude, or mkdir failure. */
1196 static struct file_struct *skip_dir = NULL;
1197 static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1198 static int need_fuzzy_dirlist = 0;
1199 struct file_struct *fuzzy_file = NULL;
1200 int fd = -1, f_copy = -1;
1201 stat_x sx, real_sx;
1202 STRUCT_STAT partial_st;
1203 struct file_struct *back_file = NULL;
1204 int statret, real_ret, stat_errno;
1205 char *fnamecmp, *partialptr, *backupptr = NULL;
1206 char fnamecmpbuf[MAXPATHLEN];
1207 uchar fnamecmp_type;
1208 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1209 int is_dir = !S_ISDIR(file->mode) ? 0
1210 : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1211 : 1;
1212
1213 if (DEBUG_GTE(GENR, 1))
1214 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1215
1216 if (list_only) {
1217 if (is_dir < 0
1218 || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1219 return;
1220 list_file_entry(file);
1221 return;
1222 }
1223
1224 maybe_ATTRS_SET_NANO = always_checksum ? ATTRS_SET_NANO : 0;
1225
1226 if (skip_dir) {
1227 if (is_below(file, skip_dir)) {
1228 if (is_dir)
1229 file->flags |= FLAG_MISSING_DIR;
1230 #ifdef SUPPORT_HARD_LINKS
1231 else if (F_IS_HLINKED(file))
1232 handle_skipped_hlink(file, itemizing, code, f_out);
1233 #endif
1234 return;
1235 }
1236 skip_dir = NULL;
1237 }
1238
1239 init_stat_x(&sx);
1240 if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1241 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1242 if (is_dir < 0)
1243 return;
1244 #ifdef SUPPORT_HARD_LINKS
1245 if (F_IS_HLINKED(file))
1246 handle_skipped_hlink(file, itemizing, code, f_out);
1247 #endif
1248 rprintf(FERROR_XFER,
1249 "ERROR: daemon refused to receive %s \"%s\"\n",
1250 is_dir ? "directory" : "file", fname);
1251 if (is_dir)
1252 goto skipping_dir_contents;
1253 return;
1254 }
1255 }
1256
1257 if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1258 int i;
1259 parent_is_dry_missing:
1260 for (i = 0; i < fuzzy_basis; i++) {
1261 if (fuzzy_dirlist[i]) {
1262 flist_free(fuzzy_dirlist[i]);
1263 fuzzy_dirlist[i] = NULL;
1264 }
1265 }
1266 parent_dirname = "";
1267 statret = -1;
1268 stat_errno = ENOENT;
1269 } else {
1270 const char *dn = file->dirname ? file->dirname : ".";
1271 dry_missing_dir = NULL;
1272 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1273 /* Each parent dir must be in the file list or the flist data is bad.
1274 * Optimization: most of the time the parent dir will be the last dir
1275 * this function was asked to process in the file list. */
1276 if (!inc_recurse
1277 && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
1278 && (!prior_dir_file || strcmp(dn, f_name(prior_dir_file, NULL)) != 0)
1279 && flist_find_name(cur_flist, dn, 1) < 0) {
1280 /* The --delete-missing-args option can actually put invalid entries into
1281 * the file list, so if that option was specified, we'll just complain about
1282 * it and allow it. */
1283 if (missing_args == 2 && file->mode == 0)
1284 rprintf(FERROR, "WARNING: parent dir is absent in the file list: %s\n", dn);
1285 else {
1286 rprintf(FERROR, "ABORTING due to invalid path from sender: %s/%s\n",
1287 dn, file->basename);
1288 exit_cleanup(RERR_PROTOCOL);
1289 }
1290 }
1291 if (relative_paths && !implied_dirs
1292 && do_stat(dn, &sx.st) < 0) {
1293 if (dry_run)
1294 goto parent_is_dry_missing;
1295 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1296 rsyserr(FERROR_XFER, errno,
1297 "recv_generator: mkdir %s failed",
1298 full_fname(dn));
1299 }
1300 }
1301 if (fuzzy_basis) {
1302 int i;
1303 for (i = 0; i < fuzzy_basis; i++) {
1304 if (fuzzy_dirlist[i]) {
1305 flist_free(fuzzy_dirlist[i]);
1306 fuzzy_dirlist[i] = NULL;
1307 }
1308 }
1309 need_fuzzy_dirlist = 1;
1310 }
1311 #ifdef SUPPORT_ACLS
1312 if (!preserve_perms)
1313 dflt_perms = default_perms_for_dir(dn);
1314 #endif
1315 }
1316 parent_dirname = dn;
1317
1318 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1319 stat_errno = errno;
1320 }
1321
1322 if (missing_args == 2 && file->mode == 0) {
1323 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1324 return;
1325 if (statret == 0)
1326 delete_item(fname, sx.st.st_mode, del_opts);
1327 return;
1328 }
1329
1330 if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1331 if (is_dir) {
1332 if (is_dir < 0)
1333 return;
1334 skip_dir = file;
1335 file->flags |= FLAG_MISSING_DIR;
1336 }
1337 #ifdef SUPPORT_HARD_LINKS
1338 else if (F_IS_HLINKED(file))
1339 handle_skipped_hlink(file, itemizing, code, f_out);
1340 #endif
1341 if (INFO_GTE(SKIP, 1)) {
1342 rprintf(FINFO, "not creating new %s \"%s\"\n",
1343 is_dir ? "directory" : "file", fname);
1344 }
1345 return;
1346 }
1347
1348 if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1349 && !am_root && sx.st.st_uid == our_uid)
1350 del_opts |= DEL_NO_UID_WRITE;
1351
1352 if (ignore_existing > 0 && statret == 0
1353 && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1354 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1355 rprintf(FINFO, "%s exists\n", fname);
1356 #ifdef SUPPORT_HARD_LINKS
1357 if (F_IS_HLINKED(file))
1358 handle_skipped_hlink(file, itemizing, code, f_out);
1359 #endif
1360 goto cleanup;
1361 }
1362
1363 fnamecmp = fname;
1364
1365 if (is_dir) {
1366 mode_t added_perms;
1367 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1368 goto cleanup;
1369 if (am_root < 0) {
1370 /* For --fake-super, the dir must be useable by the copying
1371 * user, just like it would be for root. */
1372 added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1373 } else
1374 added_perms = 0;
1375 if (is_dir < 0) {
1376 if (!(preserve_times & PRESERVE_DIR_TIMES))
1377 goto cleanup;
1378 /* In inc_recurse mode we want to make sure any missing
1379 * directories get created while we're still processing
1380 * the parent dir (which allows us to touch the parent
1381 * dir's mtime right away). We will handle the dir in
1382 * full later (right before we handle its contents). */
1383 if (statret == 0
1384 && (S_ISDIR(sx.st.st_mode)
1385 || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1386 goto cleanup; /* Any errors get reported later. */
1387 if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1388 file->flags |= FLAG_DIR_CREATED;
1389 goto cleanup;
1390 }
1391 /* The file to be received is a directory, so we need
1392 * to prepare appropriately. If there is already a
1393 * file of that name and it is *not* a directory, then
1394 * we need to delete it. If it doesn't exist, then
1395 * (perhaps recursively) create it. */
1396 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1397 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1398 goto skipping_dir_contents;
1399 statret = -1;
1400 }
1401 if (dry_run && statret != 0) {
1402 if (!dry_missing_dir)
1403 dry_missing_dir = file;
1404 file->flags |= FLAG_MISSING_DIR;
1405 }
1406 init_stat_x(&real_sx);
1407 real_sx.st = sx.st;
1408 real_ret = statret;
1409 if (file->flags & FLAG_DIR_CREATED)
1410 statret = -1;
1411 if (!preserve_perms) { /* See comment in non-dir code below. */
1412 file->mode = dest_mode(file->mode, sx.st.st_mode,
1413 dflt_perms, statret == 0);
1414 }
1415 if (statret != 0 && basis_dir[0] != NULL) {
1416 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1417 itemizing, code);
1418 if (j == -2) {
1419 itemizing = 0;
1420 code = FNONE;
1421 statret = 1;
1422 } else if (j >= 0) {
1423 statret = 1;
1424 fnamecmp = fnamecmpbuf;
1425 }
1426 }
1427 if (itemizing && f_out != -1) {
1428 itemize(fnamecmp, file, ndx, statret, &sx,
1429 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1430 }
1431 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1432 if (!relative_paths || errno != ENOENT
1433 || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1434 || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1435 rsyserr(FERROR_XFER, errno,
1436 "recv_generator: mkdir %s failed",
1437 full_fname(fname));
1438 skipping_dir_contents:
1439 rprintf(FERROR,
1440 "*** Skipping any contents from this failed directory ***\n");
1441 skip_dir = file;
1442 file->flags |= FLAG_MISSING_DIR;
1443 goto cleanup;
1444 }
1445 }
1446
1447 #ifdef SUPPORT_XATTRS
1448 if (preserve_xattrs && statret == 1)
1449 copy_xattrs(fnamecmpbuf, fname);
1450 #endif
1451 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1452 && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1453 rprintf(code, "%s/\n", fname);
1454
1455 /* We need to ensure that the dirs in the transfer have both
1456 * readable and writable permissions during the time we are
1457 * putting files within them. This is then restored to the
1458 * former permissions after the transfer is done. */
1459 #ifdef HAVE_CHMOD
1460 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1461 mode_t mode = file->mode | S_IRWXU;
1462 if (do_chmod(fname, mode) < 0) {
1463 rsyserr(FERROR_XFER, errno,
1464 "failed to modify permissions on %s",
1465 full_fname(fname));
1466 }
1467 need_retouch_dir_perms = 1;
1468 }
1469 #endif
1470
1471 if (real_ret != 0 && one_file_system)
1472 real_sx.st.st_dev = filesystem_dev;
1473 if (inc_recurse) {
1474 if (one_file_system) {
1475 uint32 *devp = F_DIR_DEV_P(file);
1476 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1477 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1478 }
1479 }
1480 else if (delete_during && f_out != -1 && !phase
1481 && !(file->flags & FLAG_MISSING_DIR)) {
1482 if (file->flags & FLAG_CONTENT_DIR)
1483 delete_in_dir(fname, file, &real_sx.st.st_dev);
1484 else
1485 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1486 }
1487 prior_dir_file = file;
1488 goto cleanup;
1489 }
1490
1491 /* If we're not preserving permissions, change the file-list's
1492 * mode based on the local permissions and some heuristics. */
1493 if (!preserve_perms) {
1494 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1495 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1496 exists);
1497 }
1498
1499 #ifdef SUPPORT_HARD_LINKS
1500 if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1501 && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1502 goto cleanup;
1503 #endif
1504
1505 if (preserve_links && S_ISLNK(file->mode)) {
1506 #ifdef SUPPORT_LINKS
1507 const char *sl = F_SYMLINK(file);
1508 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1509 if (INFO_GTE(NAME, 1)) {
1510 if (solo_file) {
1511 /* fname contains the destination path, but we
1512 * want to report the source path. */
1513 fname = f_name(file, NULL);
1514 }
1515 rprintf(FINFO,
1516 "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1517 fname, sl);
1518 }
1519 goto cleanup;
1520 }
1521 if (statret == 0) {
1522 char lnk[MAXPATHLEN];
1523 int len;
1524
1525 if (S_ISLNK(sx.st.st_mode)
1526 && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1527 && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1528 /* The link is pointing to the right place. */
1529 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1530 if (itemizing)
1531 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1532 #ifdef SUPPORT_HARD_LINKS
1533 if (preserve_hard_links && F_IS_HLINKED(file))
1534 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1535 #endif
1536 if (remove_source_files == 1)
1537 goto return_with_success;
1538 goto cleanup;
1539 }
1540 } else if (basis_dir[0] != NULL) {
1541 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1542 itemizing, code);
1543 if (j == -2) {
1544 #ifndef CAN_HARDLINK_SYMLINK
1545 if (link_dest) {
1546 /* Resort to --copy-dest behavior. */
1547 } else
1548 #endif
1549 if (!copy_dest)
1550 goto cleanup;
1551 itemizing = 0;
1552 code = FNONE;
1553 } else if (j >= 0) {
1554 statret = 1;
1555 fnamecmp = fnamecmpbuf;
1556 }
1557 }
1558 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1559 set_file_attrs(fname, file, NULL, NULL, 0);
1560 if (itemizing) {
1561 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1562 statret = -1;
1563 itemize(fnamecmp, file, ndx, statret, &sx,
1564 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1565 }
1566 if (code != FNONE && INFO_GTE(NAME, 1))
1567 rprintf(code, "%s -> %s\n", fname, sl);
1568 #ifdef SUPPORT_HARD_LINKS
1569 if (preserve_hard_links && F_IS_HLINKED(file))
1570 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1571 #endif
1572 /* This does not check remove_source_files == 1
1573 * because this is one of the items that the old
1574 * --remove-sent-files option would remove. */
1575 if (remove_source_files)
1576 goto return_with_success;
1577 }
1578 #endif
1579 goto cleanup;
1580 }
1581
1582 if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1583 || (preserve_specials && IS_SPECIAL(file->mode))) {
1584 dev_t rdev;
1585 int del_for_flag = 0;
1586 if (IS_DEVICE(file->mode)) {
1587 uint32 *devp = F_RDEV_P(file);
1588 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1589 } else
1590 rdev = 0;
1591 if (statret == 0) {
1592 if (IS_DEVICE(file->mode)) {
1593 if (!IS_DEVICE(sx.st.st_mode))
1594 statret = -1;
1595 del_for_flag = DEL_FOR_DEVICE;
1596 } else {
1597 if (!IS_SPECIAL(sx.st.st_mode))
1598 statret = -1;
1599 del_for_flag = DEL_FOR_SPECIAL;
1600 }
1601 if (statret == 0
1602 && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1603 && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1604 /* The device or special file is identical. */
1605 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1606 if (itemizing)
1607 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1608 #ifdef SUPPORT_HARD_LINKS
1609 if (preserve_hard_links && F_IS_HLINKED(file))
1610 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1611 #endif
1612 if (remove_source_files == 1)
1613 goto return_with_success;
1614 goto cleanup;
1615 }
1616 } else if (basis_dir[0] != NULL) {
1617 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1618 itemizing, code);
1619 if (j == -2) {
1620 #ifndef CAN_HARDLINK_SPECIAL
1621 if (link_dest) {
1622 /* Resort to --copy-dest behavior. */
1623 } else
1624 #endif
1625 if (!copy_dest)
1626 goto cleanup;
1627 itemizing = 0;
1628 code = FNONE;
1629 } else if (j >= 0) {
1630 statret = 1;
1631 fnamecmp = fnamecmpbuf;
1632 }
1633 }
1634 if (DEBUG_GTE(GENR, 1)) {
1635 rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1636 fname, (int)file->mode,
1637 (long)major(rdev), (long)minor(rdev));
1638 }
1639 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1640 set_file_attrs(fname, file, NULL, NULL, 0);
1641 if (itemizing) {
1642 itemize(fnamecmp, file, ndx, statret, &sx,
1643 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1644 }
1645 if (code != FNONE && INFO_GTE(NAME, 1))
1646 rprintf(code, "%s\n", fname);
1647 #ifdef SUPPORT_HARD_LINKS
1648 if (preserve_hard_links && F_IS_HLINKED(file))
1649 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1650 #endif
1651 if (remove_source_files == 1)
1652 goto return_with_success;
1653 }
1654 goto cleanup;
1655 }
1656
1657 if (!S_ISREG(file->mode)) {
1658 if (solo_file)
1659 fname = f_name(file, NULL);
1660 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1661 goto cleanup;
1662 }
1663
1664 if (max_size >= 0 && F_LENGTH(file) > max_size) {
1665 if (INFO_GTE(SKIP, 1)) {
1666 if (solo_file)
1667 fname = f_name(file, NULL);
1668 rprintf(FINFO, "%s is over max-size\n", fname);
1669 }
1670 goto cleanup;
1671 }
1672 if (min_size >= 0 && F_LENGTH(file) < min_size) {
1673 if (INFO_GTE(SKIP, 1)) {
1674 if (solo_file)
1675 fname = f_name(file, NULL);
1676 rprintf(FINFO, "%s is under min-size\n", fname);
1677 }
1678 goto cleanup;
1679 }
1680
1681 if (update_only > 0 && statret == 0 && time_diff(&sx.st, file) > 0) {
1682 if (INFO_GTE(SKIP, 1))
1683 rprintf(FINFO, "%s is newer\n", fname);
1684 #ifdef SUPPORT_HARD_LINKS
1685 if (F_IS_HLINKED(file))
1686 handle_skipped_hlink(file, itemizing, code, f_out);
1687 #endif
1688 goto cleanup;
1689 }
1690
1691 fnamecmp_type = FNAMECMP_FNAME;
1692
1693 if (statret == 0 && !(S_ISREG(sx.st.st_mode) || (write_devices && IS_DEVICE(sx.st.st_mode)))) {
1694 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1695 goto cleanup;
1696 statret = -1;
1697 stat_errno = ENOENT;
1698 }
1699
1700 if (basis_dir[0] != NULL && (statret != 0 || !copy_dest)) {
1701 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1702 statret == 0, itemizing, code);
1703 if (j == -2) {
1704 if (remove_source_files == 1)
1705 goto return_with_success;
1706 goto cleanup;
1707 }
1708 if (j >= 0) {
1709 fnamecmp = fnamecmpbuf;
1710 fnamecmp_type = j;
1711 statret = 0;
1712 }
1713 }
1714
1715 init_stat_x(&real_sx);
1716 real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1717 real_ret = statret;
1718
1719 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1720 && link_stat(partialptr, &partial_st, 0) == 0
1721 && S_ISREG(partial_st.st_mode)) {
1722 if (statret != 0)
1723 goto prepare_to_open;
1724 } else
1725 partialptr = NULL;
1726
1727 if (statret != 0 && fuzzy_basis) {
1728 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1729 const char *dn = file->dirname ? file->dirname : ".";
1730 int i;
1731 strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1732 for (i = 0; i < fuzzy_basis; i++) {
1733 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1734 continue;
1735 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES | GDL_PERHAPS_DIR);
1736 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1737 flist_free(fuzzy_dirlist[i]);
1738 fuzzy_dirlist[i] = NULL;
1739 }
1740 }
1741 need_fuzzy_dirlist = 0;
1742 }
1743
1744 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1745 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1746 if (fuzzy_file) {
1747 f_name(fuzzy_file, fnamecmpbuf);
1748 if (DEBUG_GTE(FUZZY, 1)) {
1749 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1750 fname, fnamecmpbuf);
1751 }
1752 sx.st.st_size = F_LENGTH(fuzzy_file);
1753 statret = 0;
1754 fnamecmp = fnamecmpbuf;
1755 }
1756 }
1757
1758 if (statret != 0) {
1759 #ifdef SUPPORT_HARD_LINKS
1760 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1761 cur_flist->in_progress++;
1762 goto cleanup;
1763 }
1764 #endif
1765 if (stat_errno == ENOENT)
1766 goto notify_others;
1767 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1768 full_fname(fname));
1769 goto cleanup;
1770 }
1771
1772 if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1773 ;
1774 else if (fnamecmp_type >= FNAMECMP_FUZZY)
1775 ;
1776 else if (unchanged_file(fnamecmp, file, &sx.st)) {
1777 if (partialptr) {
1778 do_unlink(partialptr);
1779 handle_partial_dir(partialptr, PDIR_DELETE);
1780 }
1781 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT | maybe_ATTRS_SET_NANO);
1782 if (itemizing)
1783 itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1784 #ifdef SUPPORT_HARD_LINKS
1785 if (preserve_hard_links && F_IS_HLINKED(file))
1786 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1787 #endif
1788 if (remove_source_files != 1)
1789 goto cleanup;
1790 return_with_success:
1791 if (!dry_run)
1792 send_msg_int(MSG_SUCCESS, ndx);
1793 goto cleanup;
1794 }
1795
1796 if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1797 #ifdef SUPPORT_HARD_LINKS
1798 if (F_IS_HLINKED(file))
1799 handle_skipped_hlink(file, itemizing, code, f_out);
1800 #endif
1801 goto cleanup;
1802 }
1803
1804 prepare_to_open:
1805 if (partialptr) {
1806 sx.st = partial_st;
1807 fnamecmp = partialptr;
1808 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1809 statret = 0;
1810 }
1811
1812 if (!do_xfers)
1813 goto notify_others;
1814
1815 if (read_batch || whole_file) {
1816 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1817 if (!(backupptr = get_backup_name(fname)))
1818 goto cleanup;
1819 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1820 goto pretend_missing;
1821 if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1822 unmake_file(back_file);
1823 back_file = NULL;
1824 goto cleanup;
1825 }
1826 }
1827 goto notify_others;
1828 }
1829
1830 if (fuzzy_dirlist[0]) {
1831 int j = flist_find(fuzzy_dirlist[0], file);
1832 if (j >= 0) /* don't use changing file as future fuzzy basis */
1833 fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1834 }
1835
1836 /* open the file */
1837 if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1838 rsyserr(FERROR, errno, "failed to open %s, continuing",
1839 full_fname(fnamecmp));
1840 pretend_missing:
1841 /* pretend the file didn't exist */
1842 #ifdef SUPPORT_HARD_LINKS
1843 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1844 cur_flist->in_progress++;
1845 goto cleanup;
1846 }
1847 #endif
1848 statret = real_ret = -1;
1849 goto notify_others;
1850 }
1851
1852 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1853 if (!(backupptr = get_backup_name(fname))) {
1854 close(fd);
1855 goto cleanup;
1856 }
1857 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1858 close(fd);
1859 goto pretend_missing;
1860 }
1861 if (robust_unlink(backupptr) && errno != ENOENT) {
1862 rsyserr(FERROR_XFER, errno, "unlink %s",
1863 full_fname(backupptr));
1864 unmake_file(back_file);
1865 back_file = NULL;
1866 close(fd);
1867 goto cleanup;
1868 }
1869 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1870 rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1871 unmake_file(back_file);
1872 back_file = NULL;
1873 close(fd);
1874 goto cleanup;
1875 }
1876 fnamecmp_type = FNAMECMP_BACKUP;
1877 }
1878
1879 if (DEBUG_GTE(DELTASUM, 3)) {
1880 rprintf(FINFO, "gen mapped %s of size %s\n",
1881 fnamecmp, big_num(sx.st.st_size));
1882 }
1883
1884 if (DEBUG_GTE(DELTASUM, 2))
1885 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1886
1887 notify_others:
1888 if (remove_source_files && !delay_updates && !phase && !dry_run)
1889 increment_active_files(ndx, itemizing, code);
1890 if (inc_recurse && (!dry_run || write_batch < 0))
1891 cur_flist->in_progress++;
1892 #ifdef SUPPORT_HARD_LINKS
1893 if (preserve_hard_links && F_IS_HLINKED(file))
1894 file->flags |= FLAG_FILE_SENT;
1895 #endif
1896 write_ndx(f_out, ndx);
1897 if (itemizing) {
1898 int iflags = ITEM_TRANSFER;
1899 if (always_checksum > 0)
1900 iflags |= ITEM_REPORT_CHANGE;
1901 if (fnamecmp_type != FNAMECMP_FNAME)
1902 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1903 if (fnamecmp_type >= FNAMECMP_FUZZY)
1904 iflags |= ITEM_XNAME_FOLLOWS;
1905 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1906 fuzzy_file ? fuzzy_file->basename : NULL);
1907 free_stat_x(&real_sx);
1908 }
1909
1910 if (!do_xfers) {
1911 #ifdef SUPPORT_HARD_LINKS
1912 if (preserve_hard_links && F_IS_HLINKED(file))
1913 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1914 #endif
1915 goto cleanup;
1916 }
1917 if (read_batch)
1918 goto cleanup;
1919
1920 if (statret != 0 || whole_file)
1921 write_sum_head(f_out, NULL);
1922 else if (sx.st.st_size <= 0) {
1923 write_sum_head(f_out, NULL);
1924 close(fd);
1925 } else {
1926 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1927 rprintf(FWARNING,
1928 "WARNING: file is too large for checksum sending: %s\n",
1929 fnamecmp);
1930 write_sum_head(f_out, NULL);
1931 }
1932 close(fd);
1933 }
1934
1935 cleanup:
1936 if (back_file) {
1937 int save_preserve_xattrs = preserve_xattrs;
1938 if (f_copy >= 0)
1939 close(f_copy);
1940 #ifdef SUPPORT_XATTRS
1941 if (preserve_xattrs) {
1942 copy_xattrs(fname, backupptr);
1943 preserve_xattrs = 0;
1944 }
1945 #endif
1946 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1947 preserve_xattrs = save_preserve_xattrs;
1948 if (INFO_GTE(BACKUP, 1)) {
1949 rprintf(FINFO, "backed up %s to %s\n",
1950 fname, backupptr);
1951 }
1952 unmake_file(back_file);
1953 }
1954
1955 free_stat_x(&sx);
1956 }
1957
1958 /* If we are replacing an existing hard link, symlink, device, or special file,
1959 * create a temp-name item and rename it into place. A symlimk specifies slnk,
1960 * a hard link specifies hlnk, otherwise we create a device based on rdev.
1961 * Specify 0 for the del_for_flag if there is not a file to replace. This
1962 * returns 1 on success and 0 on failure. */
1963 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1964 dev_t rdev, stat_x *sxp, int del_for_flag)
1965 {
1966 char tmpname[MAXPATHLEN];
1967 const char *create_name;
1968 int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1969
1970 if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1971 skip_atomic = 1;
1972 else
1973 skip_atomic = 0;
1974
1975 if (del_for_flag) {
1976 if (make_backups > 0 && !dir_in_the_way) {
1977 if (!make_backup(fname, skip_atomic))
1978 return 0;
1979 } else if (skip_atomic) {
1980 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1981 if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1982 return 0;
1983 }
1984 }
1985
1986 create_name = skip_atomic ? fname : tmpname;
1987
1988 if (slnk) {
1989 #ifdef SUPPORT_LINKS
1990 if (do_symlink(slnk, create_name) < 0) {
1991 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1992 full_fname(create_name), slnk);
1993 return 0;
1994 }
1995 #else
1996 return 0;
1997 #endif
1998 } else if (hlnk) {
1999 #ifdef SUPPORT_HARD_LINKS
2000 if (!hard_link_one(file, create_name, hlnk, 0))
2001 return 0;
2002 #else
2003 return 0;
2004 #endif
2005 } else {
2006 if (do_mknod(create_name, file->mode, rdev) < 0) {
2007 rsyserr(FERROR_XFER, errno, "mknod %s failed",
2008 full_fname(create_name));
2009 return 0;
2010 }
2011 }
2012
2013 if (!skip_atomic) {
2014 if (do_rename(tmpname, fname) < 0) {
2015 rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
2016 full_fname(tmpname), full_fname(fname));
2017 do_unlink(tmpname);
2018 return 0;
2019 }
2020 }
2021
2022 return 1;
2023 }
2024
2025 #ifdef SUPPORT_HARD_LINKS
2026 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2027 enum logcode code, int f_out)
2028 {
2029 char fbuf[MAXPATHLEN];
2030 int new_last_ndx;
2031 struct file_list *save_flist = cur_flist;
2032
2033 /* If we skip the last item in a chain of links and there was a
2034 * prior non-skipped hard-link waiting to finish, finish it now. */
2035 if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2036 return;
2037
2038 file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2039 cur_flist->in_progress--; /* undo prior increment */
2040 f_name(file, fbuf);
2041 recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2042
2043 cur_flist = save_flist;
2044 }
2045 #endif
2046
2047 static void touch_up_dirs(struct file_list *flist, int ndx)
2048 {
2049 static int counter = 0;
2050 struct file_struct *file;
2051 char *fname;
2052 BOOL fix_dir_perms;
2053 int i, start, end;
2054
2055 if (ndx < 0) {
2056 start = 0;
2057 end = flist->used - 1;
2058 } else
2059 start = end = ndx;
2060
2061 /* Fix any directory permissions that were modified during the
2062 * transfer and/or re-set any tweaked modified-time values. */
2063 for (i = start; i <= end; i++, counter++) {
2064 file = flist->files[i];
2065 if (!F_IS_ACTIVE(file))
2066 continue;
2067 if (!S_ISDIR(file->mode)
2068 || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2069 continue;
2070 if (DEBUG_GTE(TIME, 2)) {
2071 fname = f_name(file, NULL);
2072 rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2073 NS(fname), i);
2074 }
2075 /* Be sure not to retouch permissions with --fake-super. */
2076 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2077 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2078 continue;
2079 fname = f_name(file, NULL);
2080 if (fix_dir_perms)
2081 do_chmod(fname, file->mode);
2082 if (need_retouch_dir_times) {
2083 STRUCT_STAT st;
2084 if (link_stat(fname, &st, 0) == 0 && time_diff(&st, file)) {
2085 st.st_mtime = file->modtime;
2086 #ifdef ST_MTIME_NSEC
2087 st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file);
2088 #endif
2089 set_times(fname, &st);
2090 }
2091 }
2092 if (counter >= loopchk_limit) {
2093 if (allowed_lull)
2094 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2095 else
2096 maybe_flush_socket(0);
2097 counter = 0;
2098 }
2099 }
2100 }
2101
2102 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2103 {
2104 struct file_struct *file;
2105 struct file_list *flist;
2106 char fbuf[MAXPATHLEN];
2107 int ndx;
2108
2109 while (1) {
2110 #ifdef SUPPORT_HARD_LINKS
2111 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2112 int send_failed = (ndx == -2);
2113 if (send_failed)
2114 ndx = get_hlink_num();
2115 flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2116 file = flist->files[ndx - flist->ndx_start];
2117 assert(file->flags & FLAG_HLINKED);
2118 if (send_failed)
2119 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2120 else
2121 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2122 flist->in_progress--;
2123 continue;
2124 }
2125 #endif
2126
2127 if (check_redo && (ndx = get_redo_num()) != -1) {
2128 OFF_T save_max_size = max_size;
2129 OFF_T save_min_size = min_size;
2130 csum_length = SUM_LENGTH;
2131 max_size = -1;
2132 min_size = -1;
2133 ignore_existing = -ignore_existing;
2134 ignore_non_existing = -ignore_non_existing;
2135 update_only = -update_only;
2136 always_checksum = -always_checksum;
2137 size_only = -size_only;
2138 append_mode = -append_mode;
2139 make_backups = -make_backups; /* avoid dup backup w/inplace */
2140 ignore_times++;
2141
2142 flist = cur_flist;
2143 cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2144
2145 file = cur_flist->files[ndx - cur_flist->ndx_start];
2146 if (solo_file)
2147 strlcpy(fbuf, solo_file, sizeof fbuf);
2148 else
2149 f_name(file, fbuf);
2150 recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2151 cur_flist->to_redo--;
2152
2153 cur_flist = flist;
2154
2155 csum_length = SHORT_SUM_LENGTH;
2156 max_size = save_max_size;
2157 min_size = save_min_size;
2158 ignore_existing = -ignore_existing;
2159 ignore_non_existing = -ignore_non_existing;
2160 update_only = -update_only;
2161 always_checksum = -always_checksum;
2162 size_only = -size_only;
2163 append_mode = -append_mode;
2164 make_backups = -make_backups;
2165 ignore_times--;
2166 continue;
2167 }
2168
2169 if (cur_flist == first_flist)
2170 break;
2171
2172 /* We only get here if inc_recurse is enabled. */
2173 if (first_flist->in_progress || first_flist->to_redo)
2174 break;
2175
2176 write_ndx(sock_f_out, NDX_DONE);
2177 if (!read_batch && !flist_eof) {
2178 int old_total = 0;
2179 for (flist = first_flist; flist != cur_flist; flist = flist->next)
2180 old_total += flist->used;
2181 maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2182 }
2183
2184 if (delete_during == 2 || !dir_tweaking) {
2185 /* Skip directory touch-up. */
2186 } else if (first_flist->parent_ndx >= 0)
2187 touch_up_dirs(dir_flist, first_flist->parent_ndx);
2188
2189 flist_free(first_flist); /* updates first_flist */
2190 }
2191 }
2192
2193 void generate_files(int f_out, const char *local_name)
2194 {
2195 int i, ndx, next_loopchk = 0;
2196 char fbuf[MAXPATHLEN];
2197 int itemizing;
2198 enum logcode code;
2199 int save_info_flist = info_levels[INFO_FLIST];
2200 int save_info_progress = info_levels[INFO_PROGRESS];
2201
2202 if (protocol_version >= 29) {
2203 itemizing = 1;
2204 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2205 code = logfile_format_has_i ? FNONE : FLOG;
2206 } else if (am_daemon) {
2207 itemizing = logfile_format_has_i && do_xfers;
2208 maybe_ATTRS_REPORT = ATTRS_REPORT;
2209 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2210 } else if (!am_server) {
2211 itemizing = stdout_format_has_i;
2212 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2213 code = itemizing ? FNONE : FINFO;
2214 } else {
2215 itemizing = 0;
2216 maybe_ATTRS_REPORT = ATTRS_REPORT;
2217 code = FINFO;
2218 }
2219 solo_file = local_name;
2220 dir_tweaking = !(list_only || solo_file || dry_run);
2221 need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2222 loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2223 symlink_timeset_failed_flags = ITEM_REPORT_TIME
2224 | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2225 implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2226
2227 if (DEBUG_GTE(GENR, 1))
2228 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2229
2230 if (delete_before && !solo_file && cur_flist->used > 0)
2231 do_delete_pass();
2232 if (delete_during == 2) {
2233 deldelay_size = BIGPATHBUFLEN * 4;
2234 deldelay_buf = new_array(char, deldelay_size);
2235 if (!deldelay_buf)
2236 out_of_memory("delete-delay");
2237 }
2238 info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2239
2240 if (append_mode > 0 || whole_file < 0)
2241 whole_file = 0;
2242 if (DEBUG_GTE(FLIST, 1)) {
2243 rprintf(FINFO, "delta-transmission %s\n",
2244 whole_file
2245 ? "disabled for local transfer or --whole-file"
2246 : "enabled");
2247 }
2248
2249 dflt_perms = (ACCESSPERMS & ~orig_umask);
2250
2251 do {
2252 #ifdef SUPPORT_HARD_LINKS
2253 if (preserve_hard_links && inc_recurse) {
2254 while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2255 wait_for_receiver();
2256 }
2257 #endif
2258
2259 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2260 struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2261 if (solo_file)
2262 strlcpy(fbuf, solo_file, sizeof fbuf);
2263 else
2264 f_name(fp, fbuf);
2265 ndx = cur_flist->ndx_start - 1;
2266 recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2267 if (delete_during && dry_run < 2 && !list_only
2268 && !(fp->flags & FLAG_MISSING_DIR)) {
2269 if (fp->flags & FLAG_CONTENT_DIR) {
2270 dev_t dirdev;
2271 if (one_file_system) {
2272 uint32 *devp = F_DIR_DEV_P(fp);
2273 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2274 } else
2275 dirdev = MAKEDEV(0, 0);
2276 delete_in_dir(fbuf, fp, &dirdev);
2277 } else
2278 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2279 }
2280 }
2281 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2282 struct file_struct *file = cur_flist->sorted[i];
2283
2284 if (!F_IS_ACTIVE(file))
2285 continue;
2286
2287 if (unsort_ndx)
2288 ndx = F_NDX(file);
2289 else
2290 ndx = i + cur_flist->ndx_start;
2291
2292 if (solo_file)
2293 strlcpy(fbuf, solo_file, sizeof fbuf);
2294 else
2295 f_name(file, fbuf);
2296 recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2297
2298 check_for_finished_files(itemizing, code, 0);
2299
2300 if (i + cur_flist->ndx_start >= next_loopchk) {
2301 if (allowed_lull)
2302 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2303 else
2304 maybe_flush_socket(0);
2305 next_loopchk += loopchk_limit;
2306 }
2307 }
2308
2309 if (!inc_recurse) {
2310 write_ndx(f_out, NDX_DONE);
2311 break;
2312 }
2313
2314 while (1) {
2315 check_for_finished_files(itemizing, code, 1);
2316 if (cur_flist->next || flist_eof)
2317 break;
2318 wait_for_receiver();
2319 }
2320 } while ((cur_flist = cur_flist->next) != NULL);
2321
2322 if (delete_during)
2323 delete_in_dir(NULL, NULL, &dev_zero);
2324 phase++;
2325 if (DEBUG_GTE(GENR, 1))
2326 rprintf(FINFO, "generate_files phase=%d\n", phase);
2327
2328 while (1) {
2329 check_for_finished_files(itemizing, code, 1);
2330 if (msgdone_cnt)
2331 break;
2332 wait_for_receiver();
2333 }
2334
2335 phase++;
2336 if (DEBUG_GTE(GENR, 1))
2337 rprintf(FINFO, "generate_files phase=%d\n", phase);
2338
2339 write_ndx(f_out, NDX_DONE);
2340
2341 /* Reduce round-trip lag-time for a useless delay-updates phase. */
2342 if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2343 write_ndx(f_out, NDX_DONE);
2344
2345 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2346 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2347 write_del_stats(f_out);
2348 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2349 write_ndx(f_out, NDX_DONE);
2350 }
2351
2352 /* Read MSG_DONE for the redo phase (and any prior messages). */
2353 while (1) {
2354 check_for_finished_files(itemizing, code, 0);
2355 if (msgdone_cnt > 1)
2356 break;
2357 wait_for_receiver();
2358 }
2359
2360 if (protocol_version >= 29) {
2361 phase++;
2362 if (DEBUG_GTE(GENR, 1))
2363 rprintf(FINFO, "generate_files phase=%d\n", phase);
2364 if (!EARLY_DELAY_DONE_MSG()) {
2365 write_ndx(f_out, NDX_DONE);
2366 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2367 write_ndx(f_out, NDX_DONE);
2368 }
2369 /* Read MSG_DONE for delay-updates phase & prior messages. */
2370 while (msgdone_cnt == 2)
2371 wait_for_receiver();
2372 }
2373
2374 info_levels[INFO_FLIST] = save_info_flist;
2375 info_levels[INFO_PROGRESS] = save_info_progress;
2376
2377 if (delete_during == 2)
2378 do_delayed_deletions(fbuf);
2379 if (delete_after && !solo_file && file_total > 0)
2380 do_delete_pass();
2381
2382 if (max_delete >= 0 && skipped_deletes) {
2383 rprintf(FWARNING,
2384 "Deletions stopped due to --max-delete limit (%d skipped)\n",
2385 skipped_deletes);
2386 io_error |= IOERR_DEL_LIMIT;
2387 }
2388
2389 if (protocol_version >= 31) {
2390 if (!EARLY_DELETE_DONE_MSG()) {
2391 if (INFO_GTE(STATS, 2) || read_batch)
2392 write_del_stats(f_out);
2393 write_ndx(f_out, NDX_DONE);
2394 }
2395
2396 /* Read MSG_DONE for late-delete phase & prior messages. */
2397 while (msgdone_cnt == 3)
2398 wait_for_receiver();
2399 }
2400
2401 if ((need_retouch_dir_perms || need_retouch_dir_times)
2402 && dir_tweaking && (!inc_recurse || delete_during == 2))
2403 touch_up_dirs(dir_flist, -1);
2404
2405 if (DEBUG_GTE(GENR, 1))
2406 rprintf(FINFO, "generate_files finished\n");
2407 }
rsync: a fast, versatile, remote (and local) file-copying tool