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Preparing for release of 3.1.0
[rsync.git] / generator.c
blobb243b07e37b461bbee4034512d28d53ab0d1c256
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) 2003-2013 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 preserve_specials;
43 extern int preserve_hard_links;
44 extern int preserve_executability;
45 extern int preserve_perms;
46 extern int preserve_times;
47 extern int delete_mode;
48 extern int delete_before;
49 extern int delete_during;
50 extern int delete_after;
51 extern int missing_args;
52 extern int msgdone_cnt;
53 extern int ignore_errors;
54 extern int remove_source_files;
55 extern int delay_updates;
56 extern int update_only;
57 extern int human_readable;
58 extern int ignore_existing;
59 extern int ignore_non_existing;
60 extern int inplace;
61 extern int append_mode;
62 extern int make_backups;
63 extern int csum_length;
64 extern int ignore_times;
65 extern int size_only;
66 extern OFF_T max_size;
67 extern OFF_T min_size;
68 extern int io_error;
69 extern int flist_eof;
70 extern int allowed_lull;
71 extern int sock_f_out;
72 extern int protocol_version;
73 extern int file_total;
74 extern int fuzzy_basis;
75 extern int always_checksum;
76 extern int checksum_len;
77 extern char *partial_dir;
78 extern int compare_dest;
79 extern int copy_dest;
80 extern int link_dest;
81 extern int whole_file;
82 extern int list_only;
83 extern int read_batch;
84 extern int write_batch;
85 extern int safe_symlinks;
86 extern long block_size; /* "long" because popt can't set an int32. */
87 extern int unsort_ndx;
88 extern int max_delete;
89 extern int force_delete;
90 extern int one_file_system;
91 extern int skipped_deletes;
92 extern dev_t filesystem_dev;
93 extern mode_t orig_umask;
94 extern uid_t our_uid;
95 extern char *tmpdir;
96 extern char *basis_dir[MAX_BASIS_DIRS+1];
97 extern struct file_list *cur_flist, *first_flist, *dir_flist;
98 extern filter_rule_list filter_list, daemon_filter_list;
99
100 int maybe_ATTRS_REPORT = 0;
101
102 static dev_t dev_zero;
103 static int deldelay_size = 0, deldelay_cnt = 0;
104 static char *deldelay_buf = NULL;
105 static int deldelay_fd = -1;
106 static int loopchk_limit;
107 static int dir_tweaking;
108 static int symlink_timeset_failed_flags;
109 static int need_retouch_dir_times;
110 static int need_retouch_dir_perms;
111 static const char *solo_file = NULL;
112
113 enum nonregtype {
114 TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
115 };
116
117 /* Forward declarations. */
118 #ifdef SUPPORT_HARD_LINKS
119 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
120 enum logcode code, int f_out);
121 #endif
122
123 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
124 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
125
126 static int start_delete_delay_temp(void)
127 {
128 char fnametmp[MAXPATHLEN];
129 int save_dry_run = dry_run;
130
131 dry_run = 0;
132 if (!get_tmpname(fnametmp, "deldelay", False)
133 || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
134 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
135 inc_recurse ? "" : " -- switching to --delete-after");
136 delete_during = 0;
137 delete_after = !inc_recurse;
138 dry_run = save_dry_run;
139 return 0;
140 }
141 unlink(fnametmp);
142 dry_run = save_dry_run;
143 return 1;
144 }
145
146 static int flush_delete_delay(void)
147 {
148 if (deldelay_fd < 0 && !start_delete_delay_temp())
149 return 0;
150 if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
151 rsyserr(FERROR, errno, "flush of delete-delay buffer");
152 delete_during = 0;
153 delete_after = !inc_recurse;
154 close(deldelay_fd);
155 return 0;
156 }
157 deldelay_cnt = 0;
158 return 1;
159 }
160
161 static int remember_delete(struct file_struct *file, const char *fname, int flags)
162 {
163 int len;
164
165 if (deldelay_cnt == deldelay_size && !flush_delete_delay())
166 return 0;
167
168 if (flags & DEL_NO_UID_WRITE)
169 deldelay_buf[deldelay_cnt++] = '!';
170
171 while (1) {
172 len = snprintf(deldelay_buf + deldelay_cnt,
173 deldelay_size - deldelay_cnt,
174 "%x %s%c",
175 (int)file->mode, fname, '\0');
176 if ((deldelay_cnt += len) <= deldelay_size)
177 break;
178 deldelay_cnt -= len;
179 if (!flush_delete_delay())
180 return 0;
181 }
182
183 return 1;
184 }
185
186 static int read_delay_line(char *buf, int *flags_p)
187 {
188 static int read_pos = 0;
189 int j, len, mode;
190 char *bp, *past_space;
191
192 while (1) {
193 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
194 if (j < deldelay_cnt)
195 break;
196 if (deldelay_fd < 0) {
197 if (j > read_pos)
198 goto invalid_data;
199 return -1;
200 }
201 deldelay_cnt -= read_pos;
202 if (deldelay_cnt == deldelay_size)
203 goto invalid_data;
204 if (deldelay_cnt && read_pos) {
205 memmove(deldelay_buf, deldelay_buf + read_pos,
206 deldelay_cnt);
207 }
208 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
209 deldelay_size - deldelay_cnt);
210 if (len == 0) {
211 if (deldelay_cnt) {
212 rprintf(FERROR,
213 "ERROR: unexpected EOF in delete-delay file.\n");
214 }
215 return -1;
216 }
217 if (len < 0) {
218 rsyserr(FERROR, errno,
219 "reading delete-delay file");
220 return -1;
221 }
222 deldelay_cnt += len;
223 read_pos = 0;
224 }
225
226 bp = deldelay_buf + read_pos;
227 if (*bp == '!') {
228 bp++;
229 *flags_p = DEL_NO_UID_WRITE;
230 } else
231 *flags_p = 0;
232
233 if (sscanf(bp, "%x ", &mode) != 1) {
234 invalid_data:
235 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
236 return -1;
237 }
238 past_space = strchr(bp, ' ') + 1;
239 len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
240 read_pos = j + 1;
241
242 if (len > MAXPATHLEN) {
243 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
244 return -1;
245 }
246
247 /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
248 * instead of returning a pointer to our buffer. */
249 memcpy(buf, past_space, len);
250
251 return mode;
252 }
253
254 static void do_delayed_deletions(char *delbuf)
255 {
256 int mode, flags;
257
258 if (deldelay_fd >= 0) {
259 if (deldelay_cnt && !flush_delete_delay())
260 return;
261 lseek(deldelay_fd, 0, 0);
262 }
263 while ((mode = read_delay_line(delbuf, &flags)) >= 0)
264 delete_item(delbuf, mode, flags | DEL_RECURSE);
265 if (deldelay_fd >= 0)
266 close(deldelay_fd);
267 }
268
269 /* This function is used to implement per-directory deletion, and is used by
270 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
271 * MAXPATHLEN buffer with the name of the directory in it (the functions we
272 * call will append names onto the end, but the old dir value will be restored
273 * on exit). */
274 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
275 {
276 static int already_warned = 0;
277 struct file_list *dirlist;
278 char delbuf[MAXPATHLEN];
279 int dlen, i;
280
281 if (!fbuf) {
282 change_local_filter_dir(NULL, 0, 0);
283 return;
284 }
285
286 if (DEBUG_GTE(DEL, 2))
287 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
288
289 if (allowed_lull)
290 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
291
292 if (io_error & IOERR_GENERAL && !ignore_errors) {
293 if (already_warned)
294 return;
295 rprintf(FINFO,
296 "IO error encountered -- skipping file deletion\n");
297 already_warned = 1;
298 return;
299 }
300
301 dlen = strlen(fbuf);
302 change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
303
304 if (one_file_system) {
305 if (file->flags & FLAG_TOP_DIR)
306 filesystem_dev = *fs_dev;
307 else if (filesystem_dev != *fs_dev)
308 return;
309 }
310
311 dirlist = get_dirlist(fbuf, dlen, 0);
312
313 /* If an item in dirlist is not found in flist, delete it
314 * from the filesystem. */
315 for (i = dirlist->used; i--; ) {
316 struct file_struct *fp = dirlist->files[i];
317 if (!F_IS_ACTIVE(fp))
318 continue;
319 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
320 if (INFO_GTE(MOUNT, 1))
321 rprintf(FINFO, "cannot delete mount point: %s\n",
322 f_name(fp, NULL));
323 continue;
324 }
325 /* Here we want to match regardless of file type. Replacement
326 * of a file with one of another type is handled separately by
327 * a delete_item call with a DEL_MAKE_ROOM flag. */
328 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
329 int flags = DEL_RECURSE;
330 if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
331 flags |= DEL_NO_UID_WRITE;
332 f_name(fp, delbuf);
333 if (delete_during == 2) {
334 if (!remember_delete(fp, delbuf, flags))
335 break;
336 } else
337 delete_item(delbuf, fp->mode, flags);
338 }
339 }
340
341 flist_free(dirlist);
342 }
343
344 /* This deletes any files on the receiving side that are not present on the
345 * sending side. This is used by --delete-before and --delete-after. */
346 static void do_delete_pass(void)
347 {
348 char fbuf[MAXPATHLEN];
349 STRUCT_STAT st;
350 int j;
351
352 /* dry_run is incremented when the destination doesn't exist yet. */
353 if (dry_run > 1 || list_only)
354 return;
355
356 for (j = 0; j < cur_flist->used; j++) {
357 struct file_struct *file = cur_flist->sorted[j];
358
359 f_name(file, fbuf);
360
361 if (!(file->flags & FLAG_CONTENT_DIR)) {
362 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
363 continue;
364 }
365
366 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
367 rprintf(FINFO, "deleting in %s\n", fbuf);
368
369 if (link_stat(fbuf, &st, keep_dirlinks) < 0
370 || !S_ISDIR(st.st_mode))
371 continue;
372
373 delete_in_dir(fbuf, file, &st.st_dev);
374 }
375 delete_in_dir(NULL, NULL, &dev_zero);
376
377 if (INFO_GTE(FLIST, 2) && !am_server)
378 rprintf(FINFO, " \r");
379 }
380
381 static inline int time_differs(struct file_struct *file, stat_x *sxp)
382 {
383 return cmp_time(sxp->st.st_mtime, file->modtime);
384 }
385
386 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
387 {
388 if (preserve_perms)
389 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
390
391 if (preserve_executability)
392 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
393
394 return 0;
395 }
396
397 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
398 {
399 if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
400 return 1;
401
402 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
403 return 1;
404
405 return 0;
406 }
407
408 #ifdef SUPPORT_ACLS
409 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
410 {
411 if (preserve_acls) {
412 if (!ACL_READY(*sxp))
413 get_acl(fname, sxp);
414 if (set_acl(NULL, file, sxp, file->mode))
415 return 1;
416 }
417
418 return 0;
419 }
420 #endif
421
422 #ifdef SUPPORT_XATTRS
423 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
424 {
425 if (preserve_xattrs) {
426 if (!XATTR_READY(*sxp))
427 get_xattr(fname, sxp);
428 if (xattr_diff(file, sxp, 0))
429 return 1;
430 }
431
432 return 0;
433 }
434 #endif
435
436 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
437 {
438 if (S_ISLNK(file->mode)) {
439 #ifdef CAN_SET_SYMLINK_TIMES
440 if (preserve_times & PRESERVE_LINK_TIMES && time_differs(file, sxp))
441 return 0;
442 #endif
443 #ifdef CAN_CHMOD_SYMLINK
444 if (perms_differ(file, sxp))
445 return 0;
446 #endif
447 #ifdef CAN_CHOWN_SYMLINK
448 if (ownership_differs(file, sxp))
449 return 0;
450 #endif
451 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
452 if (acls_differ(fname, file, sxp))
453 return 0;
454 #endif
455 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
456 if (xattrs_differ(fname, file, sxp))
457 return 0;
458 #endif
459 } else {
460 if (preserve_times && time_differs(file, sxp))
461 return 0;
462 if (perms_differ(file, sxp))
463 return 0;
464 if (ownership_differs(file, sxp))
465 return 0;
466 #ifdef SUPPORT_ACLS
467 if (acls_differ(fname, file, sxp))
468 return 0;
469 #endif
470 #ifdef SUPPORT_XATTRS
471 if (xattrs_differ(fname, file, sxp))
472 return 0;
473 #endif
474 }
475
476 return 1;
477 }
478
479 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
480 stat_x *sxp, int32 iflags, uchar fnamecmp_type,
481 const char *xname)
482 {
483 if (statret >= 0) { /* A from-dest-dir statret can == 1! */
484 int keep_time = !preserve_times ? 0
485 : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
486 : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
487 : 1;
488
489 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
490 iflags |= ITEM_REPORT_SIZE;
491 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
492 if (iflags & ITEM_LOCAL_CHANGE)
493 iflags |= symlink_timeset_failed_flags;
494 } else if (keep_time
495 ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
496 : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
497 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
498 iflags |= ITEM_REPORT_TIME;
499 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
500 if (S_ISLNK(file->mode)) {
501 ;
502 } else
503 #endif
504 if (preserve_perms) {
505 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
506 iflags |= ITEM_REPORT_PERMS;
507 } else if (preserve_executability
508 && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
509 iflags |= ITEM_REPORT_PERMS;
510 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
511 iflags |= ITEM_REPORT_OWNER;
512 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
513 && sxp->st.st_gid != (gid_t)F_GROUP(file))
514 iflags |= ITEM_REPORT_GROUP;
515 #ifdef SUPPORT_ACLS
516 if (preserve_acls && !S_ISLNK(file->mode)) {
517 if (!ACL_READY(*sxp))
518 get_acl(fnamecmp, sxp);
519 if (set_acl(NULL, file, sxp, file->mode))
520 iflags |= ITEM_REPORT_ACL;
521 }
522 #endif
523 #ifdef SUPPORT_XATTRS
524 if (preserve_xattrs) {
525 if (!XATTR_READY(*sxp))
526 get_xattr(fnamecmp, sxp);
527 if (xattr_diff(file, sxp, 1))
528 iflags |= ITEM_REPORT_XATTR;
529 }
530 #endif
531 } else {
532 #ifdef SUPPORT_XATTRS
533 if (preserve_xattrs && xattr_diff(file, NULL, 1))
534 iflags |= ITEM_REPORT_XATTR;
535 #endif
536 iflags |= ITEM_IS_NEW;
537 }
538
539 iflags &= 0xffff;
540 if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
541 || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
542 if (protocol_version >= 29) {
543 if (ndx >= 0)
544 write_ndx(sock_f_out, ndx);
545 write_shortint(sock_f_out, iflags);
546 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
547 write_byte(sock_f_out, fnamecmp_type);
548 if (iflags & ITEM_XNAME_FOLLOWS)
549 write_vstring(sock_f_out, xname, strlen(xname));
550 #ifdef SUPPORT_XATTRS
551 if (preserve_xattrs && do_xfers
552 && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
553 int fd = iflags & ITEM_REPORT_XATTR
554 && (protocol_version < 31 || !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
555 ? sock_f_out : -1;
556 send_xattr_request(NULL, file, fd);
557 }
558 #endif
559 } else if (ndx >= 0) {
560 enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
561 log_item(code, file, iflags, xname);
562 }
563 }
564 }
565
566
567 /* Perform our quick-check heuristic for determining if a file is unchanged. */
568 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
569 {
570 if (st->st_size != F_LENGTH(file))
571 return 0;
572
573 /* if always checksum is set then we use the checksum instead
574 of the file time to determine whether to sync */
575 if (always_checksum > 0 && S_ISREG(st->st_mode)) {
576 char sum[MAX_DIGEST_LEN];
577 file_checksum(fn, sum, st->st_size);
578 return memcmp(sum, F_SUM(file), checksum_len) == 0;
579 }
580
581 if (size_only > 0)
582 return 1;
583
584 if (ignore_times)
585 return 0;
586
587 return cmp_time(st->st_mtime, file->modtime) == 0;
588 }
589
590
591 /*
592 * set (initialize) the size entries in the per-file sum_struct
593 * calculating dynamic block and checksum sizes.
594 *
595 * This is only called from generate_and_send_sums() but is a separate
596 * function to encapsulate the logic.
597 *
598 * The block size is a rounded square root of file length.
599 *
600 * The checksum size is determined according to:
601 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
602 * provided by Donovan Baarda which gives a probability of rsync
603 * algorithm corrupting data and falling back using the whole md4
604 * checksums.
605 *
606 * This might be made one of several selectable heuristics.
607 */
608 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
609 {
610 int32 blength;
611 int s2length;
612 int64 l;
613
614 if (len < 0) {
615 /* The file length overflowed our int64 var, so we can't process this file. */
616 sum->count = -1; /* indicate overflow error */
617 return;
618 }
619
620 if (block_size)
621 blength = block_size;
622 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
623 blength = BLOCK_SIZE;
624 else {
625 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
626 int32 c;
627 int cnt;
628 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
629 if (c < 0 || c >= max_blength)
630 blength = max_blength;
631 else {
632 blength = 0;
633 do {
634 blength |= c;
635 if (len < (int64)blength * blength)
636 blength &= ~c;
637 c >>= 1;
638 } while (c >= 8); /* round to multiple of 8 */
639 blength = MAX(blength, BLOCK_SIZE);
640 }
641 }
642
643 if (protocol_version < 27) {
644 s2length = csum_length;
645 } else if (csum_length == SUM_LENGTH) {
646 s2length = SUM_LENGTH;
647 } else {
648 int32 c;
649 int b = BLOCKSUM_BIAS;
650 for (l = len; l >>= 1; b += 2) {}
651 for (c = blength; (c >>= 1) && b; b--) {}
652 /* add a bit, subtract rollsum, round up. */
653 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
654 s2length = MAX(s2length, csum_length);
655 s2length = MIN(s2length, SUM_LENGTH);
656 }
657
658 sum->flength = len;
659 sum->blength = blength;
660 sum->s2length = s2length;
661 sum->remainder = (int32)(len % blength);
662 sum->count = (int32)(l = (len / blength) + (sum->remainder != 0));
663
664 if ((int64)sum->count != l)
665 sum->count = -1;
666
667 if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
668 rprintf(FINFO,
669 "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
670 big_num(sum->count), (long)sum->remainder, (long)sum->blength,
671 sum->s2length, big_num(sum->flength));
672 }
673 }
674
675
676 /*
677 * Generate and send a stream of signatures/checksums that describe a buffer
678 *
679 * Generate approximately one checksum every block_len bytes.
680 */
681 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
682 {
683 int32 i;
684 struct map_struct *mapbuf;
685 struct sum_struct sum;
686 OFF_T offset = 0;
687
688 sum_sizes_sqroot(&sum, len);
689 if (sum.count < 0)
690 return -1;
691 write_sum_head(f_out, &sum);
692
693 if (append_mode > 0 && f_copy < 0)
694 return 0;
695
696 if (len > 0)
697 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
698 else
699 mapbuf = NULL;
700
701 for (i = 0; i < sum.count; i++) {
702 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
703 char *map = map_ptr(mapbuf, offset, n1);
704 char sum2[SUM_LENGTH];
705 uint32 sum1;
706
707 len -= n1;
708 offset += n1;
709
710 if (f_copy >= 0) {
711 full_write(f_copy, map, n1);
712 if (append_mode > 0)
713 continue;
714 }
715
716 sum1 = get_checksum1(map, n1);
717 get_checksum2(map, n1, sum2);
718
719 if (DEBUG_GTE(DELTASUM, 3)) {
720 rprintf(FINFO,
721 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
722 big_num(i), big_num(offset - n1), (long)n1,
723 (unsigned long)sum1);
724 }
725 write_int(f_out, sum1);
726 write_buf(f_out, sum2, sum.s2length);
727 }
728
729 if (mapbuf)
730 unmap_file(mapbuf);
731
732 return 0;
733 }
734
735
736 /* Try to find a filename in the same dir as "fname" with a similar name. */
737 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
738 {
739 int fname_len, fname_suf_len;
740 const char *fname_suf, *fname = file->basename;
741 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
742 int i, j;
743 struct file_struct *lowest_fp = NULL;
744
745 fname_len = strlen(fname);
746 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
747
748 /* Try to find an exact size+mtime match first. */
749 for (i = 0; i < fuzzy_basis; i++) {
750 struct file_list *dirlist = dirlist_array[i];
751
752 if (!dirlist)
753 continue;
754
755 for (j = 0; j < dirlist->used; j++) {
756 struct file_struct *fp = dirlist->files[j];
757
758 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
759 continue;
760
761 if (F_LENGTH(fp) == F_LENGTH(file) && cmp_time(fp->modtime, file->modtime) == 0) {
762 if (DEBUG_GTE(FUZZY, 2))
763 rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
764 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
765 return fp;
766 }
767
768 }
769 }
770
771 for (i = 0; i < fuzzy_basis; i++) {
772 struct file_list *dirlist = dirlist_array[i];
773
774 if (!dirlist)
775 continue;
776
777 for (j = 0; j < dirlist->used; j++) {
778 struct file_struct *fp = dirlist->files[j];
779 const char *suf, *name;
780 int len, suf_len;
781 uint32 dist;
782
783 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
784 continue;
785
786 name = fp->basename;
787 len = strlen(name);
788 suf = find_filename_suffix(name, len, &suf_len);
789
790 dist = fuzzy_distance(name, len, fname, fname_len);
791 /* Add some extra weight to how well the suffixes match. */
792 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
793 if (DEBUG_GTE(FUZZY, 2)) {
794 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
795 f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
796 }
797 if (dist <= lowest_dist) {
798 lowest_dist = dist;
799 lowest_fp = fp;
800 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
801 }
802 }
803 }
804
805 return lowest_fp;
806 }
807
808 /* Copy a file found in our --copy-dest handling. */
809 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
810 {
811 char buf[MAXPATHLEN];
812 const char *copy_to, *partialptr;
813 int save_preserve_xattrs = preserve_xattrs;
814 int ok, fd_w;
815
816 if (inplace) {
817 /* Let copy_file open the destination in place. */
818 fd_w = -1;
819 copy_to = dest;
820 } else {
821 fd_w = open_tmpfile(buf, dest, file);
822 if (fd_w < 0)
823 return -1;
824 copy_to = buf;
825 }
826 cleanup_set(copy_to, NULL, NULL, -1, -1);
827 if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
828 if (INFO_GTE(COPY, 1)) {
829 rsyserr(FINFO, errno, "copy_file %s => %s",
830 full_fname(src), copy_to);
831 }
832 /* Try to clean up. */
833 unlink(copy_to);
834 cleanup_disable();
835 return -1;
836 }
837 partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
838 preserve_xattrs = 0; /* xattrs were copied with file */
839 ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
840 preserve_xattrs = save_preserve_xattrs;
841 cleanup_disable();
842 return ok ? 0 : -1;
843 }
844
845 /* This is only called for regular files. We return -2 if we've finished
846 * handling the file, -1 if no dest-linking occurred, or a non-negative
847 * value if we found an alternate basis file. If we're called with the
848 * find_exact_for_existing flag, the destination file already exists, so
849 * we only try to find an exact alt-dest match. In this case, the returns
850 * are only -2 & -1 (both as above). */
851 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
852 char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
853 int itemizing, enum logcode code)
854 {
855 STRUCT_STAT real_st = sxp->st;
856 int best_match = -1;
857 int match_level = 0;
858 int j = 0;
859
860 do {
861 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
862 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
863 continue;
864 switch (match_level) {
865 case 0:
866 best_match = j;
867 match_level = 1;
868 /* FALL THROUGH */
869 case 1:
870 if (!unchanged_file(cmpbuf, file, &sxp->st))
871 continue;
872 best_match = j;
873 match_level = 2;
874 /* FALL THROUGH */
875 case 2:
876 if (!unchanged_attrs(cmpbuf, file, sxp)) {
877 free_stat_x(sxp);
878 continue;
879 }
880 best_match = j;
881 match_level = 3;
882 break;
883 }
884 break;
885 } while (basis_dir[++j] != NULL);
886
887 if (!match_level)
888 return -1;
889
890 if (j != best_match) {
891 j = best_match;
892 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
893 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
894 return -1;
895 }
896
897 if (match_level == 3 && !copy_dest) {
898 if (find_exact_for_existing) {
899 if (link_dest && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
900 return -1;
901 if (do_unlink(fname) < 0 && errno != ENOENT) {
902 sxp->st = real_st;
903 return -1;
904 }
905 }
906 #ifdef SUPPORT_HARD_LINKS
907 if (link_dest) {
908 if (!hard_link_one(file, fname, cmpbuf, 1))
909 goto try_a_copy;
910 if (preserve_hard_links && F_IS_HLINKED(file))
911 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
912 if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
913 itemize(cmpbuf, file, ndx, 1, sxp,
914 ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
915 0, "");
916 }
917 } else
918 #endif
919 {
920 if (itemizing)
921 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
922 }
923 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
924 rprintf(FCLIENT, "%s is uptodate\n", fname);
925 return -2;
926 }
927
928 if (find_exact_for_existing) {
929 sxp->st = real_st;
930 return -1;
931 }
932
933 if (match_level >= 2) {
934 #ifdef SUPPORT_HARD_LINKS
935 try_a_copy: /* Copy the file locally. */
936 #endif
937 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
938 if (find_exact_for_existing) /* Can get here via hard-link failure */
939 sxp->st = real_st;
940 return -1;
941 }
942 if (itemizing)
943 itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
944 if (maybe_ATTRS_REPORT
945 && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
946 || (INFO_GTE(NAME, 2) && match_level == 3))) {
947 code = match_level == 3 ? FCLIENT : FINFO;
948 rprintf(code, "%s%s\n", fname,
949 match_level == 3 ? " is uptodate" : "");
950 }
951 #ifdef SUPPORT_HARD_LINKS
952 if (preserve_hard_links && F_IS_HLINKED(file))
953 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
954 #endif
955 return -2;
956 }
957
958 return FNAMECMP_BASIS_DIR_LOW + j;
959 }
960
961 /* This is only called for non-regular files. We return -2 if we've finished
962 * handling the file, or -1 if no dest-linking occurred, or a non-negative
963 * value if we found an alternate basis file. */
964 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
965 char *cmpbuf, stat_x *sxp, int itemizing,
966 enum logcode code)
967 {
968 int best_match = -1;
969 int match_level = 0;
970 enum nonregtype type;
971 uint32 *devp;
972 #ifdef SUPPORT_LINKS
973 char lnk[MAXPATHLEN];
974 int len;
975 #endif
976 int j = 0;
977
978 #ifndef SUPPORT_LINKS
979 if (S_ISLNK(file->mode))
980 return -1;
981 #endif
982 if (S_ISDIR(file->mode)) {
983 type = TYPE_DIR;
984 } else if (IS_SPECIAL(file->mode))
985 type = TYPE_SPECIAL;
986 else if (IS_DEVICE(file->mode))
987 type = TYPE_DEVICE;
988 #ifdef SUPPORT_LINKS
989 else if (S_ISLNK(file->mode))
990 type = TYPE_SYMLINK;
991 #endif
992 else {
993 rprintf(FERROR,
994 "internal: try_dests_non() called with invalid mode (%o)\n",
995 (int)file->mode);
996 exit_cleanup(RERR_UNSUPPORTED);
997 }
998
999 do {
1000 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1001 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1002 continue;
1003 switch (type) {
1004 case TYPE_DIR:
1005 if (!S_ISDIR(sxp->st.st_mode))
1006 continue;
1007 break;
1008 case TYPE_SPECIAL:
1009 if (!IS_SPECIAL(sxp->st.st_mode))
1010 continue;
1011 break;
1012 case TYPE_DEVICE:
1013 if (!IS_DEVICE(sxp->st.st_mode))
1014 continue;
1015 break;
1016 case TYPE_SYMLINK:
1017 #ifdef SUPPORT_LINKS
1018 if (!S_ISLNK(sxp->st.st_mode))
1019 continue;
1020 break;
1021 #else
1022 return -1;
1023 #endif
1024 }
1025 if (match_level < 1) {
1026 match_level = 1;
1027 best_match = j;
1028 }
1029 switch (type) {
1030 case TYPE_DIR:
1031 case TYPE_SPECIAL:
1032 break;
1033 case TYPE_DEVICE:
1034 devp = F_RDEV_P(file);
1035 if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1036 continue;
1037 break;
1038 case TYPE_SYMLINK:
1039 #ifdef SUPPORT_LINKS
1040 if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1041 continue;
1042 lnk[len] = '\0';
1043 if (strcmp(lnk, F_SYMLINK(file)) != 0)
1044 continue;
1045 break;
1046 #else
1047 return -1;
1048 #endif
1049 }
1050 if (match_level < 2) {
1051 match_level = 2;
1052 best_match = j;
1053 }
1054 if (unchanged_attrs(cmpbuf, file, sxp)) {
1055 match_level = 3;
1056 best_match = j;
1057 break;
1058 }
1059 } while (basis_dir[++j] != NULL);
1060
1061 if (!match_level)
1062 return -1;
1063
1064 if (j != best_match) {
1065 j = best_match;
1066 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1067 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1068 return -1;
1069 }
1070
1071 if (match_level == 3) {
1072 #ifdef SUPPORT_HARD_LINKS
1073 if (link_dest
1074 #ifndef CAN_HARDLINK_SYMLINK
1075 && !S_ISLNK(file->mode)
1076 #endif
1077 #ifndef CAN_HARDLINK_SPECIAL
1078 && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1079 #endif
1080 && !S_ISDIR(file->mode)) {
1081 if (do_link(cmpbuf, fname) < 0) {
1082 rsyserr(FERROR_XFER, errno,
1083 "failed to hard-link %s with %s",
1084 cmpbuf, fname);
1085 return j;
1086 }
1087 if (preserve_hard_links && F_IS_HLINKED(file))
1088 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1089 } else
1090 #endif
1091 match_level = 2;
1092 if (itemizing && stdout_format_has_i
1093 && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1094 int chg = compare_dest && type != TYPE_DIR ? 0
1095 : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1096 char *lp = match_level == 3 ? "" : NULL;
1097 itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1098 }
1099 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1100 rprintf(FCLIENT, "%s%s is uptodate\n",
1101 fname, type == TYPE_DIR ? "/" : "");
1102 }
1103 return -2;
1104 }
1105
1106 return j;
1107 }
1108
1109 static void list_file_entry(struct file_struct *f)
1110 {
1111 char permbuf[PERMSTRING_SIZE];
1112 int64 len;
1113 int colwidth = human_readable ? 14 : 11;
1114
1115 if (!F_IS_ACTIVE(f)) {
1116 /* this can happen if duplicate names were removed */
1117 return;
1118 }
1119
1120 permstring(permbuf, f->mode);
1121 len = F_LENGTH(f);
1122
1123 /* TODO: indicate '+' if the entry has an ACL. */
1124
1125 #ifdef SUPPORT_LINKS
1126 if (preserve_links && S_ISLNK(f->mode)) {
1127 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1128 permbuf, colwidth, human_num(len),
1129 timestring(f->modtime), f_name(f, NULL),
1130 F_SYMLINK(f));
1131 } else
1132 #endif
1133 if (missing_args == 2 && f->mode == 0) {
1134 rprintf(FINFO, "%-*s %s\n",
1135 colwidth + 31, "*missing",
1136 f_name(f, NULL));
1137 } else {
1138 rprintf(FINFO, "%s %*s %s %s\n",
1139 permbuf, colwidth, human_num(len),
1140 timestring(f->modtime), f_name(f, NULL));
1141 }
1142 }
1143
1144 static int phase = 0;
1145 static int dflt_perms;
1146
1147 static int implied_dirs_are_missing;
1148 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1149 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1150 {
1151 return F_DEPTH(file) > F_DEPTH(subtree)
1152 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1153 }
1154
1155 /* Acts on the indicated item in cur_flist whose name is fname. If a dir,
1156 * make sure it exists, and has the right permissions/timestamp info. For
1157 * all other non-regular files (symlinks, etc.) we create them here. For
1158 * regular files that have changed, we try to find a basis file and then
1159 * start sending checksums. The ndx is the file's unique index value.
1160 *
1161 * The fname parameter must point to a MAXPATHLEN buffer! (e.g it gets
1162 * passed to delete_item(), which can use it during a recursive delete.)
1163 *
1164 * Note that f_out is set to -1 when doing final directory-permission and
1165 * modification-time repair. */
1166 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1167 int itemizing, enum logcode code, int f_out)
1168 {
1169 static const char *parent_dirname = "";
1170 /* Missing dir not created due to --dry-run; will still be scanned. */
1171 static struct file_struct *dry_missing_dir = NULL;
1172 /* Missing dir whose contents are skipped altogether due to
1173 * --ignore-non-existing, daemon exclude, or mkdir failure. */
1174 static struct file_struct *skip_dir = NULL;
1175 static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1176 static int need_fuzzy_dirlist = 0;
1177 struct file_struct *fuzzy_file = NULL;
1178 int fd = -1, f_copy = -1;
1179 stat_x sx, real_sx;
1180 STRUCT_STAT partial_st;
1181 struct file_struct *back_file = NULL;
1182 int statret, real_ret, stat_errno;
1183 char *fnamecmp, *partialptr, *backupptr = NULL;
1184 char fnamecmpbuf[MAXPATHLEN];
1185 uchar fnamecmp_type;
1186 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1187 int is_dir = !S_ISDIR(file->mode) ? 0
1188 : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1189 : 1;
1190
1191 if (DEBUG_GTE(GENR, 1))
1192 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1193
1194 if (list_only) {
1195 if (is_dir < 0
1196 || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1197 return;
1198 list_file_entry(file);
1199 return;
1200 }
1201
1202 if (skip_dir) {
1203 if (is_below(file, skip_dir)) {
1204 if (is_dir)
1205 file->flags |= FLAG_MISSING_DIR;
1206 #ifdef SUPPORT_HARD_LINKS
1207 else if (F_IS_HLINKED(file))
1208 handle_skipped_hlink(file, itemizing, code, f_out);
1209 #endif
1210 return;
1211 }
1212 skip_dir = NULL;
1213 }
1214
1215 init_stat_x(&sx);
1216 if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1217 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1218 if (is_dir < 0)
1219 return;
1220 #ifdef SUPPORT_HARD_LINKS
1221 if (F_IS_HLINKED(file))
1222 handle_skipped_hlink(file, itemizing, code, f_out);
1223 #endif
1224 rprintf(FERROR_XFER,
1225 "ERROR: daemon refused to receive %s \"%s\"\n",
1226 is_dir ? "directory" : "file", fname);
1227 if (is_dir)
1228 goto skipping_dir_contents;
1229 return;
1230 }
1231 }
1232
1233 if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1234 int i;
1235 parent_is_dry_missing:
1236 for (i = 0; i < fuzzy_basis; i++) {
1237 if (fuzzy_dirlist[i]) {
1238 flist_free(fuzzy_dirlist[i]);
1239 fuzzy_dirlist[i] = NULL;
1240 }
1241 }
1242 parent_dirname = "";
1243 statret = -1;
1244 stat_errno = ENOENT;
1245 } else {
1246 const char *dn = file->dirname ? file->dirname : ".";
1247 dry_missing_dir = NULL;
1248 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1249 if (relative_paths && !implied_dirs
1250 && do_stat(dn, &sx.st) < 0) {
1251 if (dry_run)
1252 goto parent_is_dry_missing;
1253 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1254 rsyserr(FERROR_XFER, errno,
1255 "recv_generator: mkdir %s failed",
1256 full_fname(dn));
1257 }
1258 }
1259 if (fuzzy_basis) {
1260 int i;
1261 for (i = 0; i < fuzzy_basis; i++) {
1262 if (fuzzy_dirlist[i]) {
1263 flist_free(fuzzy_dirlist[i]);
1264 fuzzy_dirlist[i] = NULL;
1265 }
1266 }
1267 need_fuzzy_dirlist = 1;
1268 }
1269 #ifdef SUPPORT_ACLS
1270 if (!preserve_perms)
1271 dflt_perms = default_perms_for_dir(dn);
1272 #endif
1273 }
1274 parent_dirname = dn;
1275
1276 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1277 int i;
1278 strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1279 for (i = 0; i < fuzzy_basis; i++) {
1280 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1281 continue;
1282 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1283 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1284 flist_free(fuzzy_dirlist[i]);
1285 fuzzy_dirlist[i] = NULL;
1286 }
1287 }
1288 need_fuzzy_dirlist = 0;
1289 }
1290
1291 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1292 stat_errno = errno;
1293 }
1294
1295 if (missing_args == 2 && file->mode == 0) {
1296 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1297 return;
1298 if (statret == 0)
1299 delete_item(fname, sx.st.st_mode, del_opts);
1300 return;
1301 }
1302
1303 if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1304 if (is_dir) {
1305 if (is_dir < 0)
1306 return;
1307 skip_dir = file;
1308 file->flags |= FLAG_MISSING_DIR;
1309 }
1310 #ifdef SUPPORT_HARD_LINKS
1311 else if (F_IS_HLINKED(file))
1312 handle_skipped_hlink(file, itemizing, code, f_out);
1313 #endif
1314 if (INFO_GTE(SKIP, 1)) {
1315 rprintf(FINFO, "not creating new %s \"%s\"\n",
1316 is_dir ? "directory" : "file", fname);
1317 }
1318 return;
1319 }
1320
1321 if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1322 && !am_root && sx.st.st_uid == our_uid)
1323 del_opts |= DEL_NO_UID_WRITE;
1324
1325 if (ignore_existing > 0 && statret == 0
1326 && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1327 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1328 rprintf(FINFO, "%s exists\n", fname);
1329 #ifdef SUPPORT_HARD_LINKS
1330 if (F_IS_HLINKED(file))
1331 handle_skipped_hlink(file, itemizing, code, f_out);
1332 #endif
1333 goto cleanup;
1334 }
1335
1336 fnamecmp = fname;
1337
1338 if (is_dir) {
1339 mode_t added_perms;
1340 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1341 goto cleanup;
1342 if (am_root < 0) {
1343 /* For --fake-super, the dir must be useable by the copying
1344 * user, just like it would be for root. */
1345 added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1346 } else
1347 added_perms = 0;
1348 if (is_dir < 0) {
1349 /* In inc_recurse mode we want to make sure any missing
1350 * directories get created while we're still processing
1351 * the parent dir (which allows us to touch the parent
1352 * dir's mtime right away). We will handle the dir in
1353 * full later (right before we handle its contents). */
1354 if (statret == 0
1355 && (S_ISDIR(sx.st.st_mode)
1356 || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1357 goto cleanup; /* Any errors get reported later. */
1358 if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1359 file->flags |= FLAG_DIR_CREATED;
1360 goto cleanup;
1361 }
1362 /* The file to be received is a directory, so we need
1363 * to prepare appropriately. If there is already a
1364 * file of that name and it is *not* a directory, then
1365 * we need to delete it. If it doesn't exist, then
1366 * (perhaps recursively) create it. */
1367 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1368 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1369 goto skipping_dir_contents;
1370 statret = -1;
1371 }
1372 if (dry_run && statret != 0) {
1373 if (!dry_missing_dir)
1374 dry_missing_dir = file;
1375 file->flags |= FLAG_MISSING_DIR;
1376 }
1377 init_stat_x(&real_sx);
1378 real_sx.st = sx.st;
1379 real_ret = statret;
1380 if (file->flags & FLAG_DIR_CREATED)
1381 statret = -1;
1382 if (!preserve_perms) { /* See comment in non-dir code below. */
1383 file->mode = dest_mode(file->mode, sx.st.st_mode,
1384 dflt_perms, statret == 0);
1385 }
1386 if (statret != 0 && basis_dir[0] != NULL) {
1387 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1388 itemizing, code);
1389 if (j == -2) {
1390 itemizing = 0;
1391 code = FNONE;
1392 statret = 1;
1393 } else if (j >= 0) {
1394 statret = 1;
1395 fnamecmp = fnamecmpbuf;
1396 }
1397 }
1398 if (itemizing && f_out != -1) {
1399 itemize(fnamecmp, file, ndx, statret, &sx,
1400 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1401 }
1402 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1403 if (!relative_paths || errno != ENOENT
1404 || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1405 || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1406 rsyserr(FERROR_XFER, errno,
1407 "recv_generator: mkdir %s failed",
1408 full_fname(fname));
1409 skipping_dir_contents:
1410 rprintf(FERROR,
1411 "*** Skipping any contents from this failed directory ***\n");
1412 skip_dir = file;
1413 file->flags |= FLAG_MISSING_DIR;
1414 goto cleanup;
1415 }
1416 }
1417
1418 #ifdef SUPPORT_XATTRS
1419 if (preserve_xattrs && statret == 1)
1420 copy_xattrs(fnamecmpbuf, fname);
1421 #endif
1422 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1423 && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1424 rprintf(code, "%s/\n", fname);
1425
1426 /* We need to ensure that the dirs in the transfer have both
1427 * readable and writable permissions during the time we are
1428 * putting files within them. This is then restored to the
1429 * former permissions after the transfer is done. */
1430 #ifdef HAVE_CHMOD
1431 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1432 mode_t mode = file->mode | S_IRWXU;
1433 if (do_chmod(fname, mode) < 0) {
1434 rsyserr(FERROR_XFER, errno,
1435 "failed to modify permissions on %s",
1436 full_fname(fname));
1437 }
1438 need_retouch_dir_perms = 1;
1439 }
1440 #endif
1441
1442 if (real_ret != 0 && one_file_system)
1443 real_sx.st.st_dev = filesystem_dev;
1444 if (inc_recurse) {
1445 if (one_file_system) {
1446 uint32 *devp = F_DIR_DEV_P(file);
1447 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1448 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1449 }
1450 }
1451 else if (delete_during && f_out != -1 && !phase
1452 && !(file->flags & FLAG_MISSING_DIR)) {
1453 if (file->flags & FLAG_CONTENT_DIR)
1454 delete_in_dir(fname, file, &real_sx.st.st_dev);
1455 else
1456 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1457 }
1458 goto cleanup;
1459 }
1460
1461 /* If we're not preserving permissions, change the file-list's
1462 * mode based on the local permissions and some heuristics. */
1463 if (!preserve_perms) {
1464 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1465 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1466 exists);
1467 }
1468
1469 #ifdef SUPPORT_HARD_LINKS
1470 if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1471 && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1472 goto cleanup;
1473 #endif
1474
1475 if (preserve_links && S_ISLNK(file->mode)) {
1476 #ifdef SUPPORT_LINKS
1477 const char *sl = F_SYMLINK(file);
1478 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1479 if (INFO_GTE(NAME, 1)) {
1480 if (solo_file) {
1481 /* fname contains the destination path, but we
1482 * want to report the source path. */
1483 fname = f_name(file, NULL);
1484 }
1485 rprintf(FINFO,
1486 "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1487 fname, sl);
1488 }
1489 return;
1490 }
1491 if (statret == 0) {
1492 char lnk[MAXPATHLEN];
1493 int len;
1494
1495 if (S_ISLNK(sx.st.st_mode)
1496 && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1497 && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1498 /* The link is pointing to the right place. */
1499 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1500 if (itemizing)
1501 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1502 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1503 if (preserve_hard_links && F_IS_HLINKED(file))
1504 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1505 #endif
1506 if (remove_source_files == 1)
1507 goto return_with_success;
1508 goto cleanup;
1509 }
1510 } else if (basis_dir[0] != NULL) {
1511 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1512 itemizing, code);
1513 if (j == -2) {
1514 #ifndef CAN_HARDLINK_SYMLINK
1515 if (link_dest) {
1516 /* Resort to --copy-dest behavior. */
1517 } else
1518 #endif
1519 if (!copy_dest)
1520 goto cleanup;
1521 itemizing = 0;
1522 code = FNONE;
1523 } else if (j >= 0)
1524 statret = 1;
1525 }
1526 if (atomic_create(file, fname, sl, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1527 set_file_attrs(fname, file, NULL, NULL, 0);
1528 if (itemizing) {
1529 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1530 statret = -1;
1531 itemize(fname, file, ndx, statret, &sx,
1532 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1533 }
1534 if (code != FNONE && INFO_GTE(NAME, 1))
1535 rprintf(code, "%s -> %s\n", fname, sl);
1536 #ifdef SUPPORT_HARD_LINKS
1537 if (preserve_hard_links && F_IS_HLINKED(file))
1538 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1539 #endif
1540 /* This does not check remove_source_files == 1
1541 * because this is one of the items that the old
1542 * --remove-sent-files option would remove. */
1543 if (remove_source_files)
1544 goto return_with_success;
1545 }
1546 #endif
1547 goto cleanup;
1548 }
1549
1550 if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1551 || (preserve_specials && IS_SPECIAL(file->mode))) {
1552 dev_t rdev;
1553 int del_for_flag = 0;
1554 if (IS_DEVICE(file->mode)) {
1555 uint32 *devp = F_RDEV_P(file);
1556 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1557 } else
1558 rdev = 0;
1559 if (statret == 0) {
1560 if (IS_DEVICE(file->mode)) {
1561 if (!IS_DEVICE(sx.st.st_mode))
1562 statret = -1;
1563 del_for_flag = DEL_FOR_DEVICE;
1564 } else {
1565 if (!IS_SPECIAL(sx.st.st_mode))
1566 statret = -1;
1567 del_for_flag = DEL_FOR_SPECIAL;
1568 }
1569 if (statret == 0
1570 && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1571 && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1572 /* The device or special file is identical. */
1573 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1574 if (itemizing)
1575 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1576 #ifdef SUPPORT_HARD_LINKS
1577 if (preserve_hard_links && F_IS_HLINKED(file))
1578 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1579 #endif
1580 if (remove_source_files == 1)
1581 goto return_with_success;
1582 goto cleanup;
1583 }
1584 } else if (basis_dir[0] != NULL) {
1585 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1586 itemizing, code);
1587 if (j == -2) {
1588 #ifndef CAN_HARDLINK_SPECIAL
1589 if (link_dest) {
1590 /* Resort to --copy-dest behavior. */
1591 } else
1592 #endif
1593 if (!copy_dest)
1594 goto cleanup;
1595 itemizing = 0;
1596 code = FNONE;
1597 } else if (j >= 0)
1598 statret = 1;
1599 }
1600 if (DEBUG_GTE(GENR, 1)) {
1601 rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1602 fname, (int)file->mode,
1603 (long)major(rdev), (long)minor(rdev));
1604 }
1605 if (atomic_create(file, fname, NULL, rdev, &sx, del_for_flag)) {
1606 set_file_attrs(fname, file, NULL, NULL, 0);
1607 if (itemizing) {
1608 itemize(fname, file, ndx, statret, &sx,
1609 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1610 }
1611 if (code != FNONE && INFO_GTE(NAME, 1))
1612 rprintf(code, "%s\n", fname);
1613 #ifdef SUPPORT_HARD_LINKS
1614 if (preserve_hard_links && F_IS_HLINKED(file))
1615 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1616 #endif
1617 if (remove_source_files == 1)
1618 goto return_with_success;
1619 }
1620 goto cleanup;
1621 }
1622
1623 if (!S_ISREG(file->mode)) {
1624 if (solo_file)
1625 fname = f_name(file, NULL);
1626 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1627 goto cleanup;
1628 }
1629
1630 if (max_size >= 0 && F_LENGTH(file) > max_size) {
1631 if (INFO_GTE(SKIP, 1)) {
1632 if (solo_file)
1633 fname = f_name(file, NULL);
1634 rprintf(FINFO, "%s is over max-size\n", fname);
1635 }
1636 goto cleanup;
1637 }
1638 if (min_size >= 0 && F_LENGTH(file) < min_size) {
1639 if (INFO_GTE(SKIP, 1)) {
1640 if (solo_file)
1641 fname = f_name(file, NULL);
1642 rprintf(FINFO, "%s is under min-size\n", fname);
1643 }
1644 goto cleanup;
1645 }
1646
1647 if (update_only > 0 && statret == 0
1648 && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1649 if (INFO_GTE(SKIP, 1))
1650 rprintf(FINFO, "%s is newer\n", fname);
1651 #ifdef SUPPORT_HARD_LINKS
1652 if (F_IS_HLINKED(file))
1653 handle_skipped_hlink(file, itemizing, code, f_out);
1654 #endif
1655 goto cleanup;
1656 }
1657
1658 fnamecmp_type = FNAMECMP_FNAME;
1659
1660 if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1661 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1662 goto cleanup;
1663 statret = -1;
1664 stat_errno = ENOENT;
1665 }
1666
1667 if (basis_dir[0] != NULL && (statret != 0 || !copy_dest)) {
1668 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1669 statret == 0, itemizing, code);
1670 if (j == -2) {
1671 if (remove_source_files == 1)
1672 goto return_with_success;
1673 goto cleanup;
1674 }
1675 if (j >= 0) {
1676 fnamecmp = fnamecmpbuf;
1677 fnamecmp_type = j;
1678 statret = 0;
1679 }
1680 }
1681
1682 init_stat_x(&real_sx);
1683 real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1684 real_ret = statret;
1685
1686 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1687 && link_stat(partialptr, &partial_st, 0) == 0
1688 && S_ISREG(partial_st.st_mode)) {
1689 if (statret != 0)
1690 goto prepare_to_open;
1691 } else
1692 partialptr = NULL;
1693
1694 if (statret != 0 && fuzzy_basis) {
1695 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1696 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1697 if (fuzzy_file) {
1698 f_name(fuzzy_file, fnamecmpbuf);
1699 if (DEBUG_GTE(FUZZY, 1)) {
1700 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1701 fname, fnamecmpbuf);
1702 }
1703 sx.st.st_size = F_LENGTH(fuzzy_file);
1704 statret = 0;
1705 fnamecmp = fnamecmpbuf;
1706 }
1707 }
1708
1709 if (statret != 0) {
1710 #ifdef SUPPORT_HARD_LINKS
1711 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1712 cur_flist->in_progress++;
1713 goto cleanup;
1714 }
1715 #endif
1716 if (stat_errno == ENOENT)
1717 goto notify_others;
1718 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1719 full_fname(fname));
1720 goto cleanup;
1721 }
1722
1723 if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1724 ;
1725 else if (fnamecmp_type == FNAMECMP_FUZZY)
1726 ;
1727 else if (unchanged_file(fnamecmp, file, &sx.st)) {
1728 if (partialptr) {
1729 do_unlink(partialptr);
1730 handle_partial_dir(partialptr, PDIR_DELETE);
1731 }
1732 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1733 if (itemizing)
1734 itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1735 #ifdef SUPPORT_HARD_LINKS
1736 if (preserve_hard_links && F_IS_HLINKED(file))
1737 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1738 #endif
1739 if (remove_source_files != 1)
1740 goto cleanup;
1741 return_with_success:
1742 if (!dry_run)
1743 send_msg_int(MSG_SUCCESS, ndx);
1744 goto cleanup;
1745 }
1746
1747 if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1748 #ifdef SUPPORT_HARD_LINKS
1749 if (F_IS_HLINKED(file))
1750 handle_skipped_hlink(file, itemizing, code, f_out);
1751 #endif
1752 goto cleanup;
1753 }
1754
1755 prepare_to_open:
1756 if (partialptr) {
1757 sx.st = partial_st;
1758 fnamecmp = partialptr;
1759 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1760 statret = 0;
1761 }
1762
1763 if (!do_xfers)
1764 goto notify_others;
1765
1766 if (read_batch || whole_file) {
1767 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1768 if (!(backupptr = get_backup_name(fname)))
1769 goto cleanup;
1770 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1771 goto pretend_missing;
1772 if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1773 unmake_file(back_file);
1774 back_file = NULL;
1775 goto cleanup;
1776 }
1777 }
1778 goto notify_others;
1779 }
1780
1781 if (fuzzy_dirlist[0]) {
1782 int j = flist_find(fuzzy_dirlist[0], file);
1783 if (j >= 0) /* don't use changing file as future fuzzy basis */
1784 fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1785 }
1786
1787 /* open the file */
1788 if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1789 rsyserr(FERROR, errno, "failed to open %s, continuing",
1790 full_fname(fnamecmp));
1791 pretend_missing:
1792 /* pretend the file didn't exist */
1793 #ifdef SUPPORT_HARD_LINKS
1794 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1795 cur_flist->in_progress++;
1796 goto cleanup;
1797 }
1798 #endif
1799 statret = real_ret = -1;
1800 goto notify_others;
1801 }
1802
1803 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1804 if (!(backupptr = get_backup_name(fname))) {
1805 close(fd);
1806 goto cleanup;
1807 }
1808 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1809 close(fd);
1810 goto pretend_missing;
1811 }
1812 if (robust_unlink(backupptr) && errno != ENOENT) {
1813 rsyserr(FERROR_XFER, errno, "unlink %s",
1814 full_fname(backupptr));
1815 unmake_file(back_file);
1816 back_file = NULL;
1817 close(fd);
1818 goto cleanup;
1819 }
1820 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1821 rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1822 unmake_file(back_file);
1823 back_file = NULL;
1824 close(fd);
1825 goto cleanup;
1826 }
1827 fnamecmp_type = FNAMECMP_BACKUP;
1828 }
1829
1830 if (DEBUG_GTE(DELTASUM, 3)) {
1831 rprintf(FINFO, "gen mapped %s of size %s\n",
1832 fnamecmp, big_num(sx.st.st_size));
1833 }
1834
1835 if (DEBUG_GTE(DELTASUM, 2))
1836 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1837
1838 notify_others:
1839 if (remove_source_files && !delay_updates && !phase && !dry_run)
1840 increment_active_files(ndx, itemizing, code);
1841 if (inc_recurse && (!dry_run || write_batch < 0))
1842 cur_flist->in_progress++;
1843 #ifdef SUPPORT_HARD_LINKS
1844 if (preserve_hard_links && F_IS_HLINKED(file))
1845 file->flags |= FLAG_FILE_SENT;
1846 #endif
1847 write_ndx(f_out, ndx);
1848 if (itemizing) {
1849 int iflags = ITEM_TRANSFER;
1850 if (always_checksum > 0)
1851 iflags |= ITEM_REPORT_CHANGE;
1852 if (fnamecmp_type != FNAMECMP_FNAME)
1853 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1854 if (fnamecmp_type >= FNAMECMP_FUZZY)
1855 iflags |= ITEM_XNAME_FOLLOWS;
1856 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1857 fuzzy_file ? fuzzy_file->basename : NULL);
1858 free_stat_x(&real_sx);
1859 }
1860
1861 if (!do_xfers) {
1862 #ifdef SUPPORT_HARD_LINKS
1863 if (preserve_hard_links && F_IS_HLINKED(file))
1864 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1865 #endif
1866 goto cleanup;
1867 }
1868 if (read_batch)
1869 goto cleanup;
1870
1871 if (statret != 0 || whole_file)
1872 write_sum_head(f_out, NULL);
1873 else if (sx.st.st_size <= 0) {
1874 write_sum_head(f_out, NULL);
1875 close(fd);
1876 } else {
1877 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1878 rprintf(FWARNING,
1879 "WARNING: file is too large for checksum sending: %s\n",
1880 fnamecmp);
1881 write_sum_head(f_out, NULL);
1882 }
1883 close(fd);
1884 }
1885
1886 cleanup:
1887 if (back_file) {
1888 int save_preserve_xattrs = preserve_xattrs;
1889 if (f_copy >= 0)
1890 close(f_copy);
1891 #ifdef SUPPORT_XATTRS
1892 if (preserve_xattrs) {
1893 copy_xattrs(fname, backupptr);
1894 preserve_xattrs = 0;
1895 }
1896 #endif
1897 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1898 preserve_xattrs = save_preserve_xattrs;
1899 if (INFO_GTE(BACKUP, 1)) {
1900 rprintf(FINFO, "backed up %s to %s\n",
1901 fname, backupptr);
1902 }
1903 unmake_file(back_file);
1904 }
1905
1906 free_stat_x(&sx);
1907 }
1908
1909 /* If we are replacing an existing hard link, symlink, device, or special file,
1910 * create a temp-name item and rename it into place. Only a symlink or hard
1911 * link puts a non-NULL value into the lnk arg. Only a device puts a non-0
1912 * value into the rdev arg. Specify 0 for the del_for_flag if there is not a
1913 * file to replace. This returns 1 on success and 0 on failure. */
1914 int atomic_create(struct file_struct *file, char *fname, const char *lnk,
1915 dev_t rdev, stat_x *sxp, int del_for_flag)
1916 {
1917 char tmpname[MAXPATHLEN];
1918 const char *create_name;
1919 int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1920
1921 if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1922 skip_atomic = 1;
1923 else
1924 skip_atomic = 0;
1925
1926 if (del_for_flag) {
1927 if (make_backups > 0 && !dir_in_the_way) {
1928 if (!make_backup(fname, skip_atomic))
1929 return 0;
1930 } else if (skip_atomic) {
1931 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1932 if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1933 return 0;
1934 }
1935 }
1936
1937 create_name = skip_atomic ? fname : tmpname;
1938
1939 if (lnk) {
1940 #ifdef SUPPORT_LINKS
1941 if (S_ISLNK(file->mode)
1942 #ifdef SUPPORT_HARD_LINKS /* The first symlink in a hard-linked cluster is always created. */
1943 && (!F_IS_HLINKED(file) || file->flags & FLAG_HLINK_FIRST)
1944 #endif
1945 ) {
1946 if (do_symlink(lnk, create_name) < 0) {
1947 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1948 full_fname(create_name), lnk);
1949 return 0;
1950 }
1951 } else
1952 #endif
1953 #ifdef SUPPORT_HARD_LINKS
1954 if (!hard_link_one(file, create_name, lnk, 0))
1955 return 0;
1956 #endif
1957 } else {
1958 if (do_mknod(create_name, file->mode, rdev) < 0) {
1959 rsyserr(FERROR_XFER, errno, "mknod %s failed",
1960 full_fname(create_name));
1961 return 0;
1962 }
1963 }
1964
1965 if (!skip_atomic) {
1966 if (do_rename(tmpname, fname) < 0) {
1967 rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
1968 full_fname(tmpname), full_fname(fname));
1969 do_unlink(tmpname);
1970 return 0;
1971 }
1972 }
1973
1974 return 1;
1975 }
1976
1977 #ifdef SUPPORT_HARD_LINKS
1978 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1979 enum logcode code, int f_out)
1980 {
1981 char fbuf[MAXPATHLEN];
1982 int new_last_ndx;
1983 struct file_list *save_flist = cur_flist;
1984
1985 /* If we skip the last item in a chain of links and there was a
1986 * prior non-skipped hard-link waiting to finish, finish it now. */
1987 if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1988 return;
1989
1990 file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1991 cur_flist->in_progress--; /* undo prior increment */
1992 f_name(file, fbuf);
1993 recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1994
1995 cur_flist = save_flist;
1996 }
1997 #endif
1998
1999 static void touch_up_dirs(struct file_list *flist, int ndx)
2000 {
2001 static int counter = 0;
2002 struct file_struct *file;
2003 char *fname;
2004 BOOL fix_dir_perms;
2005 int i, start, end;
2006
2007 if (ndx < 0) {
2008 start = 0;
2009 end = flist->used - 1;
2010 } else
2011 start = end = ndx;
2012
2013 /* Fix any directory permissions that were modified during the
2014 * transfer and/or re-set any tweaked modified-time values. */
2015 for (i = start; i <= end; i++, counter++) {
2016 file = flist->files[i];
2017 if (!S_ISDIR(file->mode)
2018 || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2019 continue;
2020 if (DEBUG_GTE(TIME, 2)) {
2021 fname = f_name(file, NULL);
2022 rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2023 NS(fname), i);
2024 }
2025 /* Be sure not to retouch permissions with --fake-super. */
2026 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2027 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2028 || !(need_retouch_dir_times || fix_dir_perms))
2029 continue;
2030 fname = f_name(file, NULL);
2031 if (fix_dir_perms)
2032 do_chmod(fname, file->mode);
2033 if (need_retouch_dir_times) {
2034 STRUCT_STAT st;
2035 if (link_stat(fname, &st, 0) == 0
2036 && cmp_time(st.st_mtime, file->modtime) != 0)
2037 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
2038 }
2039 if (counter >= loopchk_limit) {
2040 if (allowed_lull)
2041 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2042 else
2043 maybe_flush_socket(0);
2044 counter = 0;
2045 }
2046 }
2047 }
2048
2049 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2050 {
2051 struct file_struct *file;
2052 struct file_list *flist;
2053 char fbuf[MAXPATHLEN];
2054 int ndx;
2055
2056 while (1) {
2057 #ifdef SUPPORT_HARD_LINKS
2058 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2059 int send_failed = (ndx == -2);
2060 if (send_failed)
2061 ndx = get_hlink_num();
2062 flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2063 file = flist->files[ndx - flist->ndx_start];
2064 assert(file->flags & FLAG_HLINKED);
2065 if (send_failed)
2066 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2067 else
2068 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2069 flist->in_progress--;
2070 continue;
2071 }
2072 #endif
2073
2074 if (check_redo && (ndx = get_redo_num()) != -1) {
2075 OFF_T save_max_size = max_size;
2076 OFF_T save_min_size = min_size;
2077 csum_length = SUM_LENGTH;
2078 max_size = -1;
2079 min_size = -1;
2080 ignore_existing = -ignore_existing;
2081 ignore_non_existing = -ignore_non_existing;
2082 update_only = -update_only;
2083 always_checksum = -always_checksum;
2084 size_only = -size_only;
2085 append_mode = -append_mode;
2086 make_backups = -make_backups; /* avoid dup backup w/inplace */
2087 ignore_times++;
2088
2089 flist = cur_flist;
2090 cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2091
2092 file = cur_flist->files[ndx - cur_flist->ndx_start];
2093 if (solo_file)
2094 strlcpy(fbuf, solo_file, sizeof fbuf);
2095 else
2096 f_name(file, fbuf);
2097 recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2098 cur_flist->to_redo--;
2099
2100 cur_flist = flist;
2101
2102 csum_length = SHORT_SUM_LENGTH;
2103 max_size = save_max_size;
2104 min_size = save_min_size;
2105 ignore_existing = -ignore_existing;
2106 ignore_non_existing = -ignore_non_existing;
2107 update_only = -update_only;
2108 always_checksum = -always_checksum;
2109 size_only = -size_only;
2110 append_mode = -append_mode;
2111 make_backups = -make_backups;
2112 ignore_times--;
2113 continue;
2114 }
2115
2116 if (cur_flist == first_flist)
2117 break;
2118
2119 /* We only get here if inc_recurse is enabled. */
2120 if (first_flist->in_progress || first_flist->to_redo)
2121 break;
2122
2123 write_ndx(sock_f_out, NDX_DONE);
2124 if (!read_batch && !flist_eof) {
2125 int old_total = 0;
2126 for (flist = first_flist; flist != cur_flist; flist = flist->next)
2127 old_total += flist->used;
2128 maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2129 }
2130
2131 if (delete_during == 2 || !dir_tweaking) {
2132 /* Skip directory touch-up. */
2133 } else if (first_flist->parent_ndx >= 0)
2134 touch_up_dirs(dir_flist, first_flist->parent_ndx);
2135
2136 flist_free(first_flist); /* updates first_flist */
2137 }
2138 }
2139
2140 void generate_files(int f_out, const char *local_name)
2141 {
2142 int i, ndx, next_loopchk = 0;
2143 char fbuf[MAXPATHLEN];
2144 int itemizing;
2145 enum logcode code;
2146 int save_info_flist = info_levels[INFO_FLIST];
2147 int save_info_progress = info_levels[INFO_PROGRESS];
2148
2149 if (protocol_version >= 29) {
2150 itemizing = 1;
2151 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2152 code = logfile_format_has_i ? FNONE : FLOG;
2153 } else if (am_daemon) {
2154 itemizing = logfile_format_has_i && do_xfers;
2155 maybe_ATTRS_REPORT = ATTRS_REPORT;
2156 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2157 } else if (!am_server) {
2158 itemizing = stdout_format_has_i;
2159 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2160 code = itemizing ? FNONE : FINFO;
2161 } else {
2162 itemizing = 0;
2163 maybe_ATTRS_REPORT = ATTRS_REPORT;
2164 code = FINFO;
2165 }
2166 solo_file = local_name;
2167 dir_tweaking = !(list_only || solo_file || dry_run);
2168 need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2169 loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2170 symlink_timeset_failed_flags = ITEM_REPORT_TIME
2171 | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2172 implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2173
2174 if (DEBUG_GTE(GENR, 1))
2175 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2176
2177 if (delete_before && !solo_file && cur_flist->used > 0)
2178 do_delete_pass();
2179 if (delete_during == 2) {
2180 deldelay_size = BIGPATHBUFLEN * 4;
2181 deldelay_buf = new_array(char, deldelay_size);
2182 if (!deldelay_buf)
2183 out_of_memory("delete-delay");
2184 }
2185 info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2186
2187 if (append_mode > 0 || whole_file < 0)
2188 whole_file = 0;
2189 if (DEBUG_GTE(FLIST, 1)) {
2190 rprintf(FINFO, "delta-transmission %s\n",
2191 whole_file
2192 ? "disabled for local transfer or --whole-file"
2193 : "enabled");
2194 }
2195
2196 dflt_perms = (ACCESSPERMS & ~orig_umask);
2197
2198 do {
2199 #ifdef SUPPORT_HARD_LINKS
2200 if (preserve_hard_links && inc_recurse) {
2201 while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2202 wait_for_receiver();
2203 }
2204 #endif
2205
2206 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2207 struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2208 if (solo_file)
2209 strlcpy(fbuf, solo_file, sizeof fbuf);
2210 else
2211 f_name(fp, fbuf);
2212 ndx = cur_flist->ndx_start - 1;
2213 recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2214 if (delete_during && dry_run < 2 && !list_only
2215 && !(fp->flags & FLAG_MISSING_DIR)) {
2216 if (fp->flags & FLAG_CONTENT_DIR) {
2217 dev_t dirdev;
2218 if (one_file_system) {
2219 uint32 *devp = F_DIR_DEV_P(fp);
2220 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2221 } else
2222 dirdev = MAKEDEV(0, 0);
2223 delete_in_dir(fbuf, fp, &dirdev);
2224 } else
2225 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2226 }
2227 }
2228 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2229 struct file_struct *file = cur_flist->sorted[i];
2230
2231 if (!F_IS_ACTIVE(file))
2232 continue;
2233
2234 if (unsort_ndx)
2235 ndx = F_NDX(file);
2236 else
2237 ndx = i + cur_flist->ndx_start;
2238
2239 if (solo_file)
2240 strlcpy(fbuf, solo_file, sizeof fbuf);
2241 else
2242 f_name(file, fbuf);
2243 recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2244
2245 check_for_finished_files(itemizing, code, 0);
2246
2247 if (i + cur_flist->ndx_start >= next_loopchk) {
2248 if (allowed_lull)
2249 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2250 else
2251 maybe_flush_socket(0);
2252 next_loopchk += loopchk_limit;
2253 }
2254 }
2255
2256 if (!inc_recurse) {
2257 write_ndx(f_out, NDX_DONE);
2258 break;
2259 }
2260
2261 while (1) {
2262 check_for_finished_files(itemizing, code, 1);
2263 if (cur_flist->next || flist_eof)
2264 break;
2265 wait_for_receiver();
2266 }
2267 } while ((cur_flist = cur_flist->next) != NULL);
2268
2269 if (delete_during)
2270 delete_in_dir(NULL, NULL, &dev_zero);
2271 phase++;
2272 if (DEBUG_GTE(GENR, 1))
2273 rprintf(FINFO, "generate_files phase=%d\n", phase);
2274
2275 while (1) {
2276 check_for_finished_files(itemizing, code, 1);
2277 if (msgdone_cnt)
2278 break;
2279 wait_for_receiver();
2280 }
2281
2282 phase++;
2283 if (DEBUG_GTE(GENR, 1))
2284 rprintf(FINFO, "generate_files phase=%d\n", phase);
2285
2286 write_ndx(f_out, NDX_DONE);
2287
2288 /* Reduce round-trip lag-time for a useless delay-updates phase. */
2289 if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2290 write_ndx(f_out, NDX_DONE);
2291
2292 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2293 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2294 write_del_stats(f_out);
2295 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2296 write_ndx(f_out, NDX_DONE);
2297 }
2298
2299 /* Read MSG_DONE for the redo phase (and any prior messages). */
2300 while (1) {
2301 check_for_finished_files(itemizing, code, 0);
2302 if (msgdone_cnt > 1)
2303 break;
2304 wait_for_receiver();
2305 }
2306
2307 if (protocol_version >= 29) {
2308 phase++;
2309 if (DEBUG_GTE(GENR, 1))
2310 rprintf(FINFO, "generate_files phase=%d\n", phase);
2311 if (!EARLY_DELAY_DONE_MSG()) {
2312 write_ndx(f_out, NDX_DONE);
2313 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2314 write_ndx(f_out, NDX_DONE);
2315 }
2316 /* Read MSG_DONE for delay-updates phase & prior messages. */
2317 while (msgdone_cnt == 2)
2318 wait_for_receiver();
2319 }
2320
2321 info_levels[INFO_FLIST] = save_info_flist;
2322 info_levels[INFO_PROGRESS] = save_info_progress;
2323
2324 if (delete_during == 2)
2325 do_delayed_deletions(fbuf);
2326 if (delete_after && !solo_file && file_total > 0)
2327 do_delete_pass();
2328
2329 if (max_delete >= 0 && skipped_deletes) {
2330 rprintf(FWARNING,
2331 "Deletions stopped due to --max-delete limit (%d skipped)\n",
2332 skipped_deletes);
2333 io_error |= IOERR_DEL_LIMIT;
2334 }
2335
2336 if (protocol_version >= 31) {
2337 if (!EARLY_DELETE_DONE_MSG()) {
2338 if (INFO_GTE(STATS, 2) || read_batch)
2339 write_del_stats(f_out);
2340 write_ndx(f_out, NDX_DONE);
2341 }
2342
2343 /* Read MSG_DONE for late-delete phase & prior messages. */
2344 while (msgdone_cnt == 3)
2345 wait_for_receiver();
2346 }
2347
2348 if ((need_retouch_dir_perms || need_retouch_dir_times)
2349 && dir_tweaking && (!inc_recurse || delete_during == 2))
2350 touch_up_dirs(dir_flist, -1);
2351
2352 if (DEBUG_GTE(GENR, 1))
2353 rprintf(FINFO, "generate_files finished\n");
2354 }
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