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Preparing for release of 3.1.1
[rsync.git] / generator.c
blob91009a535116e903f3ebd77d4e2abaf18b126b76
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) 2003-2014 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 want_xattr_optim;
61 extern int inplace;
62 extern int append_mode;
63 extern int make_backups;
64 extern int csum_length;
65 extern int ignore_times;
66 extern int size_only;
67 extern OFF_T max_size;
68 extern OFF_T min_size;
69 extern int io_error;
70 extern int flist_eof;
71 extern int allowed_lull;
72 extern int sock_f_out;
73 extern int protocol_version;
74 extern int file_total;
75 extern int fuzzy_basis;
76 extern int always_checksum;
77 extern int checksum_len;
78 extern char *partial_dir;
79 extern int compare_dest;
80 extern int copy_dest;
81 extern int link_dest;
82 extern int whole_file;
83 extern int list_only;
84 extern int read_batch;
85 extern int write_batch;
86 extern int safe_symlinks;
87 extern long block_size; /* "long" because popt can't set an int32. */
88 extern int unsort_ndx;
89 extern int max_delete;
90 extern int force_delete;
91 extern int one_file_system;
92 extern int skipped_deletes;
93 extern dev_t filesystem_dev;
94 extern mode_t orig_umask;
95 extern uid_t our_uid;
96 extern char *tmpdir;
97 extern char *basis_dir[MAX_BASIS_DIRS+1];
98 extern struct file_list *cur_flist, *first_flist, *dir_flist;
99 extern filter_rule_list filter_list, daemon_filter_list;
100
101 int maybe_ATTRS_REPORT = 0;
102
103 static dev_t dev_zero;
104 static int deldelay_size = 0, deldelay_cnt = 0;
105 static char *deldelay_buf = NULL;
106 static int deldelay_fd = -1;
107 static int loopchk_limit;
108 static int dir_tweaking;
109 static int symlink_timeset_failed_flags;
110 static int need_retouch_dir_times;
111 static int need_retouch_dir_perms;
112 static const char *solo_file = NULL;
113
114 enum nonregtype {
115 TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
116 };
117
118 /* Forward declarations. */
119 #ifdef SUPPORT_HARD_LINKS
120 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
121 enum logcode code, int f_out);
122 #endif
123
124 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
125 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
126
127 static int start_delete_delay_temp(void)
128 {
129 char fnametmp[MAXPATHLEN];
130 int save_dry_run = dry_run;
131
132 dry_run = 0;
133 if (!get_tmpname(fnametmp, "deldelay", False)
134 || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
135 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
136 inc_recurse ? "" : " -- switching to --delete-after");
137 delete_during = 0;
138 delete_after = !inc_recurse;
139 dry_run = save_dry_run;
140 return 0;
141 }
142 unlink(fnametmp);
143 dry_run = save_dry_run;
144 return 1;
145 }
146
147 static int flush_delete_delay(void)
148 {
149 if (deldelay_fd < 0 && !start_delete_delay_temp())
150 return 0;
151 if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
152 rsyserr(FERROR, errno, "flush of delete-delay buffer");
153 delete_during = 0;
154 delete_after = !inc_recurse;
155 close(deldelay_fd);
156 return 0;
157 }
158 deldelay_cnt = 0;
159 return 1;
160 }
161
162 static int remember_delete(struct file_struct *file, const char *fname, int flags)
163 {
164 int len;
165
166 if (deldelay_cnt == deldelay_size && !flush_delete_delay())
167 return 0;
168
169 if (flags & DEL_NO_UID_WRITE)
170 deldelay_buf[deldelay_cnt++] = '!';
171
172 while (1) {
173 len = snprintf(deldelay_buf + deldelay_cnt,
174 deldelay_size - deldelay_cnt,
175 "%x %s%c",
176 (int)file->mode, fname, '\0');
177 if ((deldelay_cnt += len) <= deldelay_size)
178 break;
179 deldelay_cnt -= len;
180 if (!flush_delete_delay())
181 return 0;
182 }
183
184 return 1;
185 }
186
187 static int read_delay_line(char *buf, int *flags_p)
188 {
189 static int read_pos = 0;
190 int j, len, mode;
191 char *bp, *past_space;
192
193 while (1) {
194 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
195 if (j < deldelay_cnt)
196 break;
197 if (deldelay_fd < 0) {
198 if (j > read_pos)
199 goto invalid_data;
200 return -1;
201 }
202 deldelay_cnt -= read_pos;
203 if (deldelay_cnt == deldelay_size)
204 goto invalid_data;
205 if (deldelay_cnt && read_pos) {
206 memmove(deldelay_buf, deldelay_buf + read_pos,
207 deldelay_cnt);
208 }
209 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
210 deldelay_size - deldelay_cnt);
211 if (len == 0) {
212 if (deldelay_cnt) {
213 rprintf(FERROR,
214 "ERROR: unexpected EOF in delete-delay file.\n");
215 }
216 return -1;
217 }
218 if (len < 0) {
219 rsyserr(FERROR, errno,
220 "reading delete-delay file");
221 return -1;
222 }
223 deldelay_cnt += len;
224 read_pos = 0;
225 }
226
227 bp = deldelay_buf + read_pos;
228 if (*bp == '!') {
229 bp++;
230 *flags_p = DEL_NO_UID_WRITE;
231 } else
232 *flags_p = 0;
233
234 if (sscanf(bp, "%x ", &mode) != 1) {
235 invalid_data:
236 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
237 return -1;
238 }
239 past_space = strchr(bp, ' ') + 1;
240 len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
241 read_pos = j + 1;
242
243 if (len > MAXPATHLEN) {
244 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
245 return -1;
246 }
247
248 /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
249 * instead of returning a pointer to our buffer. */
250 memcpy(buf, past_space, len);
251
252 return mode;
253 }
254
255 static void do_delayed_deletions(char *delbuf)
256 {
257 int mode, flags;
258
259 if (deldelay_fd >= 0) {
260 if (deldelay_cnt && !flush_delete_delay())
261 return;
262 lseek(deldelay_fd, 0, 0);
263 }
264 while ((mode = read_delay_line(delbuf, &flags)) >= 0)
265 delete_item(delbuf, mode, flags | DEL_RECURSE);
266 if (deldelay_fd >= 0)
267 close(deldelay_fd);
268 }
269
270 /* This function is used to implement per-directory deletion, and is used by
271 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
272 * MAXPATHLEN buffer with the name of the directory in it (the functions we
273 * call will append names onto the end, but the old dir value will be restored
274 * on exit). */
275 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
276 {
277 static int already_warned = 0;
278 struct file_list *dirlist;
279 char delbuf[MAXPATHLEN];
280 int dlen, i;
281
282 if (!fbuf) {
283 change_local_filter_dir(NULL, 0, 0);
284 return;
285 }
286
287 if (DEBUG_GTE(DEL, 2))
288 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
289
290 if (allowed_lull)
291 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
292
293 if (io_error & IOERR_GENERAL && !ignore_errors) {
294 if (already_warned)
295 return;
296 rprintf(FINFO,
297 "IO error encountered -- skipping file deletion\n");
298 already_warned = 1;
299 return;
300 }
301
302 dlen = strlen(fbuf);
303 change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
304
305 if (one_file_system) {
306 if (file->flags & FLAG_TOP_DIR)
307 filesystem_dev = *fs_dev;
308 else if (filesystem_dev != *fs_dev)
309 return;
310 }
311
312 dirlist = get_dirlist(fbuf, dlen, 0);
313
314 /* If an item in dirlist is not found in flist, delete it
315 * from the filesystem. */
316 for (i = dirlist->used; i--; ) {
317 struct file_struct *fp = dirlist->files[i];
318 if (!F_IS_ACTIVE(fp))
319 continue;
320 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
321 if (INFO_GTE(MOUNT, 1))
322 rprintf(FINFO, "cannot delete mount point: %s\n",
323 f_name(fp, NULL));
324 continue;
325 }
326 /* Here we want to match regardless of file type. Replacement
327 * of a file with one of another type is handled separately by
328 * a delete_item call with a DEL_MAKE_ROOM flag. */
329 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
330 int flags = DEL_RECURSE;
331 if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
332 flags |= DEL_NO_UID_WRITE;
333 f_name(fp, delbuf);
334 if (delete_during == 2) {
335 if (!remember_delete(fp, delbuf, flags))
336 break;
337 } else
338 delete_item(delbuf, fp->mode, flags);
339 }
340 }
341
342 flist_free(dirlist);
343 }
344
345 /* This deletes any files on the receiving side that are not present on the
346 * sending side. This is used by --delete-before and --delete-after. */
347 static void do_delete_pass(void)
348 {
349 char fbuf[MAXPATHLEN];
350 STRUCT_STAT st;
351 int j;
352
353 /* dry_run is incremented when the destination doesn't exist yet. */
354 if (dry_run > 1 || list_only)
355 return;
356
357 for (j = 0; j < cur_flist->used; j++) {
358 struct file_struct *file = cur_flist->sorted[j];
359
360 if (!F_IS_ACTIVE(file))
361 continue;
362
363 f_name(file, fbuf);
364
365 if (!(file->flags & FLAG_CONTENT_DIR)) {
366 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
367 continue;
368 }
369
370 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
371 rprintf(FINFO, "deleting in %s\n", fbuf);
372
373 if (link_stat(fbuf, &st, keep_dirlinks) < 0
374 || !S_ISDIR(st.st_mode))
375 continue;
376
377 delete_in_dir(fbuf, file, &st.st_dev);
378 }
379 delete_in_dir(NULL, NULL, &dev_zero);
380
381 if (INFO_GTE(FLIST, 2) && !am_server)
382 rprintf(FINFO, " \r");
383 }
384
385 static inline int time_differs(struct file_struct *file, stat_x *sxp)
386 {
387 return cmp_time(sxp->st.st_mtime, file->modtime);
388 }
389
390 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
391 {
392 if (preserve_perms)
393 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
394
395 if (preserve_executability)
396 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
397
398 return 0;
399 }
400
401 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
402 {
403 if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
404 return 1;
405
406 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
407 return 1;
408
409 return 0;
410 }
411
412 #ifdef SUPPORT_ACLS
413 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
414 {
415 if (preserve_acls) {
416 if (!ACL_READY(*sxp))
417 get_acl(fname, sxp);
418 if (set_acl(NULL, file, sxp, file->mode))
419 return 1;
420 }
421
422 return 0;
423 }
424 #endif
425
426 #ifdef SUPPORT_XATTRS
427 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
428 {
429 if (preserve_xattrs) {
430 if (!XATTR_READY(*sxp))
431 get_xattr(fname, sxp);
432 if (xattr_diff(file, sxp, 0))
433 return 1;
434 }
435
436 return 0;
437 }
438 #endif
439
440 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
441 {
442 if (S_ISLNK(file->mode)) {
443 #ifdef CAN_SET_SYMLINK_TIMES
444 if (preserve_times & PRESERVE_LINK_TIMES && time_differs(file, sxp))
445 return 0;
446 #endif
447 #ifdef CAN_CHMOD_SYMLINK
448 if (perms_differ(file, sxp))
449 return 0;
450 #endif
451 #ifdef CAN_CHOWN_SYMLINK
452 if (ownership_differs(file, sxp))
453 return 0;
454 #endif
455 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
456 if (acls_differ(fname, file, sxp))
457 return 0;
458 #endif
459 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
460 if (xattrs_differ(fname, file, sxp))
461 return 0;
462 #endif
463 } else {
464 if (preserve_times && time_differs(file, sxp))
465 return 0;
466 if (perms_differ(file, sxp))
467 return 0;
468 if (ownership_differs(file, sxp))
469 return 0;
470 #ifdef SUPPORT_ACLS
471 if (acls_differ(fname, file, sxp))
472 return 0;
473 #endif
474 #ifdef SUPPORT_XATTRS
475 if (xattrs_differ(fname, file, sxp))
476 return 0;
477 #endif
478 }
479
480 return 1;
481 }
482
483 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
484 stat_x *sxp, int32 iflags, uchar fnamecmp_type,
485 const char *xname)
486 {
487 if (statret >= 0) { /* A from-dest-dir statret can == 1! */
488 int keep_time = !preserve_times ? 0
489 : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
490 : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
491 : 1;
492
493 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
494 iflags |= ITEM_REPORT_SIZE;
495 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
496 if (iflags & ITEM_LOCAL_CHANGE)
497 iflags |= symlink_timeset_failed_flags;
498 } else if (keep_time
499 ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
500 : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
501 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
502 iflags |= ITEM_REPORT_TIME;
503 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
504 if (S_ISLNK(file->mode)) {
505 ;
506 } else
507 #endif
508 if (preserve_perms) {
509 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
510 iflags |= ITEM_REPORT_PERMS;
511 } else if (preserve_executability
512 && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
513 iflags |= ITEM_REPORT_PERMS;
514 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
515 iflags |= ITEM_REPORT_OWNER;
516 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
517 && sxp->st.st_gid != (gid_t)F_GROUP(file))
518 iflags |= ITEM_REPORT_GROUP;
519 #ifdef SUPPORT_ACLS
520 if (preserve_acls && !S_ISLNK(file->mode)) {
521 if (!ACL_READY(*sxp))
522 get_acl(fnamecmp, sxp);
523 if (set_acl(NULL, file, sxp, file->mode))
524 iflags |= ITEM_REPORT_ACL;
525 }
526 #endif
527 #ifdef SUPPORT_XATTRS
528 if (preserve_xattrs) {
529 if (!XATTR_READY(*sxp))
530 get_xattr(fnamecmp, sxp);
531 if (xattr_diff(file, sxp, 1))
532 iflags |= ITEM_REPORT_XATTR;
533 }
534 #endif
535 } else {
536 #ifdef SUPPORT_XATTRS
537 if (preserve_xattrs && xattr_diff(file, NULL, 1))
538 iflags |= ITEM_REPORT_XATTR;
539 #endif
540 iflags |= ITEM_IS_NEW;
541 }
542
543 iflags &= 0xffff;
544 if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
545 || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
546 if (protocol_version >= 29) {
547 if (ndx >= 0)
548 write_ndx(sock_f_out, ndx);
549 write_shortint(sock_f_out, iflags);
550 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
551 write_byte(sock_f_out, fnamecmp_type);
552 if (iflags & ITEM_XNAME_FOLLOWS)
553 write_vstring(sock_f_out, xname, strlen(xname));
554 #ifdef SUPPORT_XATTRS
555 if (preserve_xattrs && do_xfers
556 && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
557 int fd = iflags & ITEM_REPORT_XATTR
558 && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
559 ? sock_f_out : -1;
560 send_xattr_request(NULL, file, fd);
561 }
562 #endif
563 } else if (ndx >= 0) {
564 enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
565 log_item(code, file, iflags, xname);
566 }
567 }
568 }
569
570
571 /* Perform our quick-check heuristic for determining if a file is unchanged. */
572 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
573 {
574 if (st->st_size != F_LENGTH(file))
575 return 0;
576
577 /* if always checksum is set then we use the checksum instead
578 of the file time to determine whether to sync */
579 if (always_checksum > 0 && S_ISREG(st->st_mode)) {
580 char sum[MAX_DIGEST_LEN];
581 file_checksum(fn, st, sum);
582 return memcmp(sum, F_SUM(file), checksum_len) == 0;
583 }
584
585 if (size_only > 0)
586 return 1;
587
588 if (ignore_times)
589 return 0;
590
591 return cmp_time(st->st_mtime, file->modtime) == 0;
592 }
593
594
595 /*
596 * set (initialize) the size entries in the per-file sum_struct
597 * calculating dynamic block and checksum sizes.
598 *
599 * This is only called from generate_and_send_sums() but is a separate
600 * function to encapsulate the logic.
601 *
602 * The block size is a rounded square root of file length.
603 *
604 * The checksum size is determined according to:
605 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
606 * provided by Donovan Baarda which gives a probability of rsync
607 * algorithm corrupting data and falling back using the whole md4
608 * checksums.
609 *
610 * This might be made one of several selectable heuristics.
611 */
612 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
613 {
614 int32 blength;
615 int s2length;
616 int64 l;
617
618 if (len < 0) {
619 /* The file length overflowed our int64 var, so we can't process this file. */
620 sum->count = -1; /* indicate overflow error */
621 return;
622 }
623
624 if (block_size)
625 blength = block_size;
626 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
627 blength = BLOCK_SIZE;
628 else {
629 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
630 int32 c;
631 int cnt;
632 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
633 if (c < 0 || c >= max_blength)
634 blength = max_blength;
635 else {
636 blength = 0;
637 do {
638 blength |= c;
639 if (len < (int64)blength * blength)
640 blength &= ~c;
641 c >>= 1;
642 } while (c >= 8); /* round to multiple of 8 */
643 blength = MAX(blength, BLOCK_SIZE);
644 }
645 }
646
647 if (protocol_version < 27) {
648 s2length = csum_length;
649 } else if (csum_length == SUM_LENGTH) {
650 s2length = SUM_LENGTH;
651 } else {
652 int32 c;
653 int b = BLOCKSUM_BIAS;
654 for (l = len; l >>= 1; b += 2) {}
655 for (c = blength; (c >>= 1) && b; b--) {}
656 /* add a bit, subtract rollsum, round up. */
657 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
658 s2length = MAX(s2length, csum_length);
659 s2length = MIN(s2length, SUM_LENGTH);
660 }
661
662 sum->flength = len;
663 sum->blength = blength;
664 sum->s2length = s2length;
665 sum->remainder = (int32)(len % blength);
666 sum->count = (int32)(l = (len / blength) + (sum->remainder != 0));
667
668 if ((int64)sum->count != l)
669 sum->count = -1;
670
671 if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
672 rprintf(FINFO,
673 "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
674 big_num(sum->count), (long)sum->remainder, (long)sum->blength,
675 sum->s2length, big_num(sum->flength));
676 }
677 }
678
679
680 /*
681 * Generate and send a stream of signatures/checksums that describe a buffer
682 *
683 * Generate approximately one checksum every block_len bytes.
684 */
685 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
686 {
687 int32 i;
688 struct map_struct *mapbuf;
689 struct sum_struct sum;
690 OFF_T offset = 0;
691
692 sum_sizes_sqroot(&sum, len);
693 if (sum.count < 0)
694 return -1;
695 write_sum_head(f_out, &sum);
696
697 if (append_mode > 0 && f_copy < 0)
698 return 0;
699
700 if (len > 0)
701 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
702 else
703 mapbuf = NULL;
704
705 for (i = 0; i < sum.count; i++) {
706 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
707 char *map = map_ptr(mapbuf, offset, n1);
708 char sum2[SUM_LENGTH];
709 uint32 sum1;
710
711 len -= n1;
712 offset += n1;
713
714 if (f_copy >= 0) {
715 full_write(f_copy, map, n1);
716 if (append_mode > 0)
717 continue;
718 }
719
720 sum1 = get_checksum1(map, n1);
721 get_checksum2(map, n1, sum2);
722
723 if (DEBUG_GTE(DELTASUM, 3)) {
724 rprintf(FINFO,
725 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
726 big_num(i), big_num(offset - n1), (long)n1,
727 (unsigned long)sum1);
728 }
729 write_int(f_out, sum1);
730 write_buf(f_out, sum2, sum.s2length);
731 }
732
733 if (mapbuf)
734 unmap_file(mapbuf);
735
736 return 0;
737 }
738
739
740 /* Try to find a filename in the same dir as "fname" with a similar name. */
741 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
742 {
743 int fname_len, fname_suf_len;
744 const char *fname_suf, *fname = file->basename;
745 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
746 int i, j;
747 struct file_struct *lowest_fp = NULL;
748
749 fname_len = strlen(fname);
750 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
751
752 /* Try to find an exact size+mtime match first. */
753 for (i = 0; i < fuzzy_basis; i++) {
754 struct file_list *dirlist = dirlist_array[i];
755
756 if (!dirlist)
757 continue;
758
759 for (j = 0; j < dirlist->used; j++) {
760 struct file_struct *fp = dirlist->files[j];
761
762 if (!F_IS_ACTIVE(fp))
763 continue;
764
765 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
766 continue;
767
768 if (F_LENGTH(fp) == F_LENGTH(file) && cmp_time(fp->modtime, file->modtime) == 0) {
769 if (DEBUG_GTE(FUZZY, 2))
770 rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
771 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
772 return fp;
773 }
774
775 }
776 }
777
778 for (i = 0; i < fuzzy_basis; i++) {
779 struct file_list *dirlist = dirlist_array[i];
780
781 if (!dirlist)
782 continue;
783
784 for (j = 0; j < dirlist->used; j++) {
785 struct file_struct *fp = dirlist->files[j];
786 const char *suf, *name;
787 int len, suf_len;
788 uint32 dist;
789
790 if (!F_IS_ACTIVE(fp))
791 continue;
792
793 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
794 continue;
795
796 name = fp->basename;
797 len = strlen(name);
798 suf = find_filename_suffix(name, len, &suf_len);
799
800 dist = fuzzy_distance(name, len, fname, fname_len);
801 /* Add some extra weight to how well the suffixes match. */
802 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
803 if (DEBUG_GTE(FUZZY, 2)) {
804 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
805 f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
806 }
807 if (dist <= lowest_dist) {
808 lowest_dist = dist;
809 lowest_fp = fp;
810 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
811 }
812 }
813 }
814
815 return lowest_fp;
816 }
817
818 /* Copy a file found in our --copy-dest handling. */
819 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
820 {
821 char buf[MAXPATHLEN];
822 const char *copy_to, *partialptr;
823 int save_preserve_xattrs = preserve_xattrs;
824 int ok, fd_w;
825
826 if (inplace) {
827 /* Let copy_file open the destination in place. */
828 fd_w = -1;
829 copy_to = dest;
830 } else {
831 fd_w = open_tmpfile(buf, dest, file);
832 if (fd_w < 0)
833 return -1;
834 copy_to = buf;
835 }
836 cleanup_set(copy_to, NULL, NULL, -1, -1);
837 if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
838 if (INFO_GTE(COPY, 1)) {
839 rsyserr(FINFO, errno, "copy_file %s => %s",
840 full_fname(src), copy_to);
841 }
842 /* Try to clean up. */
843 unlink(copy_to);
844 cleanup_disable();
845 return -1;
846 }
847 partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
848 preserve_xattrs = 0; /* xattrs were copied with file */
849 ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
850 preserve_xattrs = save_preserve_xattrs;
851 cleanup_disable();
852 return ok ? 0 : -1;
853 }
854
855 /* This is only called for regular files. We return -2 if we've finished
856 * handling the file, -1 if no dest-linking occurred, or a non-negative
857 * value if we found an alternate basis file. If we're called with the
858 * find_exact_for_existing flag, the destination file already exists, so
859 * we only try to find an exact alt-dest match. In this case, the returns
860 * are only -2 & -1 (both as above). */
861 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
862 char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
863 int itemizing, enum logcode code)
864 {
865 STRUCT_STAT real_st = sxp->st;
866 int best_match = -1;
867 int match_level = 0;
868 int j = 0;
869
870 do {
871 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
872 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
873 continue;
874 switch (match_level) {
875 case 0:
876 best_match = j;
877 match_level = 1;
878 /* FALL THROUGH */
879 case 1:
880 if (!unchanged_file(cmpbuf, file, &sxp->st))
881 continue;
882 best_match = j;
883 match_level = 2;
884 /* FALL THROUGH */
885 case 2:
886 if (!unchanged_attrs(cmpbuf, file, sxp)) {
887 free_stat_x(sxp);
888 continue;
889 }
890 best_match = j;
891 match_level = 3;
892 break;
893 }
894 break;
895 } while (basis_dir[++j] != NULL);
896
897 if (!match_level)
898 return -1;
899
900 if (j != best_match) {
901 j = best_match;
902 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
903 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
904 return -1;
905 }
906
907 if (match_level == 3 && !copy_dest) {
908 if (find_exact_for_existing) {
909 if (link_dest && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
910 return -1;
911 if (do_unlink(fname) < 0 && errno != ENOENT) {
912 sxp->st = real_st;
913 return -1;
914 }
915 }
916 #ifdef SUPPORT_HARD_LINKS
917 if (link_dest) {
918 if (!hard_link_one(file, fname, cmpbuf, 1))
919 goto try_a_copy;
920 if (preserve_hard_links && F_IS_HLINKED(file))
921 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
922 if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
923 itemize(cmpbuf, file, ndx, 1, sxp,
924 ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
925 0, "");
926 }
927 } else
928 #endif
929 {
930 if (itemizing)
931 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
932 }
933 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
934 rprintf(FCLIENT, "%s is uptodate\n", fname);
935 return -2;
936 }
937
938 if (find_exact_for_existing) {
939 sxp->st = real_st;
940 return -1;
941 }
942
943 if (match_level >= 2) {
944 #ifdef SUPPORT_HARD_LINKS
945 try_a_copy: /* Copy the file locally. */
946 #endif
947 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
948 if (find_exact_for_existing) /* Can get here via hard-link failure */
949 sxp->st = real_st;
950 return -1;
951 }
952 if (itemizing)
953 itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
954 if (maybe_ATTRS_REPORT
955 && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
956 || (INFO_GTE(NAME, 2) && match_level == 3))) {
957 code = match_level == 3 ? FCLIENT : FINFO;
958 rprintf(code, "%s%s\n", fname,
959 match_level == 3 ? " is uptodate" : "");
960 }
961 #ifdef SUPPORT_HARD_LINKS
962 if (preserve_hard_links && F_IS_HLINKED(file))
963 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
964 #endif
965 return -2;
966 }
967
968 return FNAMECMP_BASIS_DIR_LOW + j;
969 }
970
971 /* This is only called for non-regular files. We return -2 if we've finished
972 * handling the file, or -1 if no dest-linking occurred, or a non-negative
973 * value if we found an alternate basis file. */
974 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
975 char *cmpbuf, stat_x *sxp, int itemizing,
976 enum logcode code)
977 {
978 int best_match = -1;
979 int match_level = 0;
980 enum nonregtype type;
981 uint32 *devp;
982 #ifdef SUPPORT_LINKS
983 char lnk[MAXPATHLEN];
984 int len;
985 #endif
986 int j = 0;
987
988 #ifndef SUPPORT_LINKS
989 if (S_ISLNK(file->mode))
990 return -1;
991 #endif
992 if (S_ISDIR(file->mode)) {
993 type = TYPE_DIR;
994 } else if (IS_SPECIAL(file->mode))
995 type = TYPE_SPECIAL;
996 else if (IS_DEVICE(file->mode))
997 type = TYPE_DEVICE;
998 #ifdef SUPPORT_LINKS
999 else if (S_ISLNK(file->mode))
1000 type = TYPE_SYMLINK;
1001 #endif
1002 else {
1003 rprintf(FERROR,
1004 "internal: try_dests_non() called with invalid mode (%o)\n",
1005 (int)file->mode);
1006 exit_cleanup(RERR_UNSUPPORTED);
1007 }
1008
1009 do {
1010 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1011 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1012 continue;
1013 switch (type) {
1014 case TYPE_DIR:
1015 if (!S_ISDIR(sxp->st.st_mode))
1016 continue;
1017 break;
1018 case TYPE_SPECIAL:
1019 if (!IS_SPECIAL(sxp->st.st_mode))
1020 continue;
1021 break;
1022 case TYPE_DEVICE:
1023 if (!IS_DEVICE(sxp->st.st_mode))
1024 continue;
1025 break;
1026 case TYPE_SYMLINK:
1027 #ifdef SUPPORT_LINKS
1028 if (!S_ISLNK(sxp->st.st_mode))
1029 continue;
1030 break;
1031 #else
1032 return -1;
1033 #endif
1034 }
1035 if (match_level < 1) {
1036 match_level = 1;
1037 best_match = j;
1038 }
1039 switch (type) {
1040 case TYPE_DIR:
1041 case TYPE_SPECIAL:
1042 break;
1043 case TYPE_DEVICE:
1044 devp = F_RDEV_P(file);
1045 if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1046 continue;
1047 break;
1048 case TYPE_SYMLINK:
1049 #ifdef SUPPORT_LINKS
1050 if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1051 continue;
1052 lnk[len] = '\0';
1053 if (strcmp(lnk, F_SYMLINK(file)) != 0)
1054 continue;
1055 break;
1056 #else
1057 return -1;
1058 #endif
1059 }
1060 if (match_level < 2) {
1061 match_level = 2;
1062 best_match = j;
1063 }
1064 if (unchanged_attrs(cmpbuf, file, sxp)) {
1065 match_level = 3;
1066 best_match = j;
1067 break;
1068 }
1069 } while (basis_dir[++j] != NULL);
1070
1071 if (!match_level)
1072 return -1;
1073
1074 if (j != best_match) {
1075 j = best_match;
1076 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1077 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1078 return -1;
1079 }
1080
1081 if (match_level == 3) {
1082 #ifdef SUPPORT_HARD_LINKS
1083 if (link_dest
1084 #ifndef CAN_HARDLINK_SYMLINK
1085 && !S_ISLNK(file->mode)
1086 #endif
1087 #ifndef CAN_HARDLINK_SPECIAL
1088 && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1089 #endif
1090 && !S_ISDIR(file->mode)) {
1091 if (do_link(cmpbuf, fname) < 0) {
1092 rsyserr(FERROR_XFER, errno,
1093 "failed to hard-link %s with %s",
1094 cmpbuf, fname);
1095 return j;
1096 }
1097 if (preserve_hard_links && F_IS_HLINKED(file))
1098 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1099 } else
1100 #endif
1101 match_level = 2;
1102 if (itemizing && stdout_format_has_i
1103 && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1104 int chg = compare_dest && type != TYPE_DIR ? 0
1105 : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1106 char *lp = match_level == 3 ? "" : NULL;
1107 itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1108 }
1109 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1110 rprintf(FCLIENT, "%s%s is uptodate\n",
1111 fname, type == TYPE_DIR ? "/" : "");
1112 }
1113 return -2;
1114 }
1115
1116 return j;
1117 }
1118
1119 static void list_file_entry(struct file_struct *f)
1120 {
1121 char permbuf[PERMSTRING_SIZE];
1122 int64 len;
1123 int colwidth = human_readable ? 14 : 11;
1124
1125 if (!F_IS_ACTIVE(f)) {
1126 /* this can happen if duplicate names were removed */
1127 return;
1128 }
1129
1130 permstring(permbuf, f->mode);
1131 len = F_LENGTH(f);
1132
1133 /* TODO: indicate '+' if the entry has an ACL. */
1134
1135 #ifdef SUPPORT_LINKS
1136 if (preserve_links && S_ISLNK(f->mode)) {
1137 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1138 permbuf, colwidth, human_num(len),
1139 timestring(f->modtime), f_name(f, NULL),
1140 F_SYMLINK(f));
1141 } else
1142 #endif
1143 if (missing_args == 2 && f->mode == 0) {
1144 rprintf(FINFO, "%-*s %s\n",
1145 colwidth + 31, "*missing",
1146 f_name(f, NULL));
1147 } else {
1148 rprintf(FINFO, "%s %*s %s %s\n",
1149 permbuf, colwidth, human_num(len),
1150 timestring(f->modtime), f_name(f, NULL));
1151 }
1152 }
1153
1154 static int phase = 0;
1155 static int dflt_perms;
1156
1157 static int implied_dirs_are_missing;
1158 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1159 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1160 {
1161 return F_DEPTH(file) > F_DEPTH(subtree)
1162 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1163 }
1164
1165 /* Acts on the indicated item in cur_flist whose name is fname. If a dir,
1166 * make sure it exists, and has the right permissions/timestamp info. For
1167 * all other non-regular files (symlinks, etc.) we create them here. For
1168 * regular files that have changed, we try to find a basis file and then
1169 * start sending checksums. The ndx is the file's unique index value.
1170 *
1171 * The fname parameter must point to a MAXPATHLEN buffer! (e.g it gets
1172 * passed to delete_item(), which can use it during a recursive delete.)
1173 *
1174 * Note that f_out is set to -1 when doing final directory-permission and
1175 * modification-time repair. */
1176 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1177 int itemizing, enum logcode code, int f_out)
1178 {
1179 static const char *parent_dirname = "";
1180 /* Missing dir not created due to --dry-run; will still be scanned. */
1181 static struct file_struct *dry_missing_dir = NULL;
1182 /* Missing dir whose contents are skipped altogether due to
1183 * --ignore-non-existing, daemon exclude, or mkdir failure. */
1184 static struct file_struct *skip_dir = NULL;
1185 static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1186 static int need_fuzzy_dirlist = 0;
1187 struct file_struct *fuzzy_file = NULL;
1188 int fd = -1, f_copy = -1;
1189 stat_x sx, real_sx;
1190 STRUCT_STAT partial_st;
1191 struct file_struct *back_file = NULL;
1192 int statret, real_ret, stat_errno;
1193 char *fnamecmp, *partialptr, *backupptr = NULL;
1194 char fnamecmpbuf[MAXPATHLEN];
1195 uchar fnamecmp_type;
1196 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1197 int is_dir = !S_ISDIR(file->mode) ? 0
1198 : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1199 : 1;
1200
1201 if (DEBUG_GTE(GENR, 1))
1202 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1203
1204 if (list_only) {
1205 if (is_dir < 0
1206 || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1207 return;
1208 list_file_entry(file);
1209 return;
1210 }
1211
1212 if (skip_dir) {
1213 if (is_below(file, skip_dir)) {
1214 if (is_dir)
1215 file->flags |= FLAG_MISSING_DIR;
1216 #ifdef SUPPORT_HARD_LINKS
1217 else if (F_IS_HLINKED(file))
1218 handle_skipped_hlink(file, itemizing, code, f_out);
1219 #endif
1220 return;
1221 }
1222 skip_dir = NULL;
1223 }
1224
1225 init_stat_x(&sx);
1226 if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1227 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1228 if (is_dir < 0)
1229 return;
1230 #ifdef SUPPORT_HARD_LINKS
1231 if (F_IS_HLINKED(file))
1232 handle_skipped_hlink(file, itemizing, code, f_out);
1233 #endif
1234 rprintf(FERROR_XFER,
1235 "ERROR: daemon refused to receive %s \"%s\"\n",
1236 is_dir ? "directory" : "file", fname);
1237 if (is_dir)
1238 goto skipping_dir_contents;
1239 return;
1240 }
1241 }
1242
1243 if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1244 int i;
1245 parent_is_dry_missing:
1246 for (i = 0; i < fuzzy_basis; i++) {
1247 if (fuzzy_dirlist[i]) {
1248 flist_free(fuzzy_dirlist[i]);
1249 fuzzy_dirlist[i] = NULL;
1250 }
1251 }
1252 parent_dirname = "";
1253 statret = -1;
1254 stat_errno = ENOENT;
1255 } else {
1256 const char *dn = file->dirname ? file->dirname : ".";
1257 dry_missing_dir = NULL;
1258 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1259 if (relative_paths && !implied_dirs
1260 && do_stat(dn, &sx.st) < 0) {
1261 if (dry_run)
1262 goto parent_is_dry_missing;
1263 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1264 rsyserr(FERROR_XFER, errno,
1265 "recv_generator: mkdir %s failed",
1266 full_fname(dn));
1267 }
1268 }
1269 if (fuzzy_basis) {
1270 int i;
1271 for (i = 0; i < fuzzy_basis; i++) {
1272 if (fuzzy_dirlist[i]) {
1273 flist_free(fuzzy_dirlist[i]);
1274 fuzzy_dirlist[i] = NULL;
1275 }
1276 }
1277 need_fuzzy_dirlist = 1;
1278 }
1279 #ifdef SUPPORT_ACLS
1280 if (!preserve_perms)
1281 dflt_perms = default_perms_for_dir(dn);
1282 #endif
1283 }
1284 parent_dirname = dn;
1285
1286 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1287 int i;
1288 strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1289 for (i = 0; i < fuzzy_basis; i++) {
1290 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1291 continue;
1292 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1293 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1294 flist_free(fuzzy_dirlist[i]);
1295 fuzzy_dirlist[i] = NULL;
1296 }
1297 }
1298 need_fuzzy_dirlist = 0;
1299 }
1300
1301 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1302 stat_errno = errno;
1303 }
1304
1305 if (missing_args == 2 && file->mode == 0) {
1306 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1307 return;
1308 if (statret == 0)
1309 delete_item(fname, sx.st.st_mode, del_opts);
1310 return;
1311 }
1312
1313 if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1314 if (is_dir) {
1315 if (is_dir < 0)
1316 return;
1317 skip_dir = file;
1318 file->flags |= FLAG_MISSING_DIR;
1319 }
1320 #ifdef SUPPORT_HARD_LINKS
1321 else if (F_IS_HLINKED(file))
1322 handle_skipped_hlink(file, itemizing, code, f_out);
1323 #endif
1324 if (INFO_GTE(SKIP, 1)) {
1325 rprintf(FINFO, "not creating new %s \"%s\"\n",
1326 is_dir ? "directory" : "file", fname);
1327 }
1328 return;
1329 }
1330
1331 if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1332 && !am_root && sx.st.st_uid == our_uid)
1333 del_opts |= DEL_NO_UID_WRITE;
1334
1335 if (ignore_existing > 0 && statret == 0
1336 && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1337 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1338 rprintf(FINFO, "%s exists\n", fname);
1339 #ifdef SUPPORT_HARD_LINKS
1340 if (F_IS_HLINKED(file))
1341 handle_skipped_hlink(file, itemizing, code, f_out);
1342 #endif
1343 goto cleanup;
1344 }
1345
1346 fnamecmp = fname;
1347
1348 if (is_dir) {
1349 mode_t added_perms;
1350 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1351 goto cleanup;
1352 if (am_root < 0) {
1353 /* For --fake-super, the dir must be useable by the copying
1354 * user, just like it would be for root. */
1355 added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1356 } else
1357 added_perms = 0;
1358 if (is_dir < 0) {
1359 if (!(preserve_times & PRESERVE_DIR_TIMES))
1360 return;
1361 /* In inc_recurse mode we want to make sure any missing
1362 * directories get created while we're still processing
1363 * the parent dir (which allows us to touch the parent
1364 * dir's mtime right away). We will handle the dir in
1365 * full later (right before we handle its contents). */
1366 if (statret == 0
1367 && (S_ISDIR(sx.st.st_mode)
1368 || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1369 goto cleanup; /* Any errors get reported later. */
1370 if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1371 file->flags |= FLAG_DIR_CREATED;
1372 goto cleanup;
1373 }
1374 /* The file to be received is a directory, so we need
1375 * to prepare appropriately. If there is already a
1376 * file of that name and it is *not* a directory, then
1377 * we need to delete it. If it doesn't exist, then
1378 * (perhaps recursively) create it. */
1379 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1380 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1381 goto skipping_dir_contents;
1382 statret = -1;
1383 }
1384 if (dry_run && statret != 0) {
1385 if (!dry_missing_dir)
1386 dry_missing_dir = file;
1387 file->flags |= FLAG_MISSING_DIR;
1388 }
1389 init_stat_x(&real_sx);
1390 real_sx.st = sx.st;
1391 real_ret = statret;
1392 if (file->flags & FLAG_DIR_CREATED)
1393 statret = -1;
1394 if (!preserve_perms) { /* See comment in non-dir code below. */
1395 file->mode = dest_mode(file->mode, sx.st.st_mode,
1396 dflt_perms, statret == 0);
1397 }
1398 if (statret != 0 && basis_dir[0] != NULL) {
1399 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1400 itemizing, code);
1401 if (j == -2) {
1402 itemizing = 0;
1403 code = FNONE;
1404 statret = 1;
1405 } else if (j >= 0) {
1406 statret = 1;
1407 fnamecmp = fnamecmpbuf;
1408 }
1409 }
1410 if (itemizing && f_out != -1) {
1411 itemize(fnamecmp, file, ndx, statret, &sx,
1412 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1413 }
1414 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1415 if (!relative_paths || errno != ENOENT
1416 || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1417 || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1418 rsyserr(FERROR_XFER, errno,
1419 "recv_generator: mkdir %s failed",
1420 full_fname(fname));
1421 skipping_dir_contents:
1422 rprintf(FERROR,
1423 "*** Skipping any contents from this failed directory ***\n");
1424 skip_dir = file;
1425 file->flags |= FLAG_MISSING_DIR;
1426 goto cleanup;
1427 }
1428 }
1429
1430 #ifdef SUPPORT_XATTRS
1431 if (preserve_xattrs && statret == 1)
1432 copy_xattrs(fnamecmpbuf, fname);
1433 #endif
1434 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1435 && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1436 rprintf(code, "%s/\n", fname);
1437
1438 /* We need to ensure that the dirs in the transfer have both
1439 * readable and writable permissions during the time we are
1440 * putting files within them. This is then restored to the
1441 * former permissions after the transfer is done. */
1442 #ifdef HAVE_CHMOD
1443 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1444 mode_t mode = file->mode | S_IRWXU;
1445 if (do_chmod(fname, mode) < 0) {
1446 rsyserr(FERROR_XFER, errno,
1447 "failed to modify permissions on %s",
1448 full_fname(fname));
1449 }
1450 need_retouch_dir_perms = 1;
1451 }
1452 #endif
1453
1454 if (real_ret != 0 && one_file_system)
1455 real_sx.st.st_dev = filesystem_dev;
1456 if (inc_recurse) {
1457 if (one_file_system) {
1458 uint32 *devp = F_DIR_DEV_P(file);
1459 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1460 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1461 }
1462 }
1463 else if (delete_during && f_out != -1 && !phase
1464 && !(file->flags & FLAG_MISSING_DIR)) {
1465 if (file->flags & FLAG_CONTENT_DIR)
1466 delete_in_dir(fname, file, &real_sx.st.st_dev);
1467 else
1468 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1469 }
1470 goto cleanup;
1471 }
1472
1473 /* If we're not preserving permissions, change the file-list's
1474 * mode based on the local permissions and some heuristics. */
1475 if (!preserve_perms) {
1476 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1477 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1478 exists);
1479 }
1480
1481 #ifdef SUPPORT_HARD_LINKS
1482 if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1483 && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1484 goto cleanup;
1485 #endif
1486
1487 if (preserve_links && S_ISLNK(file->mode)) {
1488 #ifdef SUPPORT_LINKS
1489 const char *sl = F_SYMLINK(file);
1490 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1491 if (INFO_GTE(NAME, 1)) {
1492 if (solo_file) {
1493 /* fname contains the destination path, but we
1494 * want to report the source path. */
1495 fname = f_name(file, NULL);
1496 }
1497 rprintf(FINFO,
1498 "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1499 fname, sl);
1500 }
1501 return;
1502 }
1503 if (statret == 0) {
1504 char lnk[MAXPATHLEN];
1505 int len;
1506
1507 if (S_ISLNK(sx.st.st_mode)
1508 && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1509 && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1510 /* The link is pointing to the right place. */
1511 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1512 if (itemizing)
1513 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1514 #ifdef SUPPORT_HARD_LINKS
1515 if (preserve_hard_links && F_IS_HLINKED(file))
1516 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1517 #endif
1518 if (remove_source_files == 1)
1519 goto return_with_success;
1520 goto cleanup;
1521 }
1522 } else if (basis_dir[0] != NULL) {
1523 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1524 itemizing, code);
1525 if (j == -2) {
1526 #ifndef CAN_HARDLINK_SYMLINK
1527 if (link_dest) {
1528 /* Resort to --copy-dest behavior. */
1529 } else
1530 #endif
1531 if (!copy_dest)
1532 goto cleanup;
1533 itemizing = 0;
1534 code = FNONE;
1535 } else if (j >= 0) {
1536 statret = 1;
1537 fnamecmp = fnamecmpbuf;
1538 }
1539 }
1540 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1541 set_file_attrs(fname, file, NULL, NULL, 0);
1542 if (itemizing) {
1543 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1544 statret = -1;
1545 itemize(fnamecmp, file, ndx, statret, &sx,
1546 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1547 }
1548 if (code != FNONE && INFO_GTE(NAME, 1))
1549 rprintf(code, "%s -> %s\n", fname, sl);
1550 #ifdef SUPPORT_HARD_LINKS
1551 if (preserve_hard_links && F_IS_HLINKED(file))
1552 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1553 #endif
1554 /* This does not check remove_source_files == 1
1555 * because this is one of the items that the old
1556 * --remove-sent-files option would remove. */
1557 if (remove_source_files)
1558 goto return_with_success;
1559 }
1560 #endif
1561 goto cleanup;
1562 }
1563
1564 if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1565 || (preserve_specials && IS_SPECIAL(file->mode))) {
1566 dev_t rdev;
1567 int del_for_flag = 0;
1568 if (IS_DEVICE(file->mode)) {
1569 uint32 *devp = F_RDEV_P(file);
1570 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1571 } else
1572 rdev = 0;
1573 if (statret == 0) {
1574 if (IS_DEVICE(file->mode)) {
1575 if (!IS_DEVICE(sx.st.st_mode))
1576 statret = -1;
1577 del_for_flag = DEL_FOR_DEVICE;
1578 } else {
1579 if (!IS_SPECIAL(sx.st.st_mode))
1580 statret = -1;
1581 del_for_flag = DEL_FOR_SPECIAL;
1582 }
1583 if (statret == 0
1584 && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1585 && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1586 /* The device or special file is identical. */
1587 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1588 if (itemizing)
1589 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1590 #ifdef SUPPORT_HARD_LINKS
1591 if (preserve_hard_links && F_IS_HLINKED(file))
1592 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1593 #endif
1594 if (remove_source_files == 1)
1595 goto return_with_success;
1596 goto cleanup;
1597 }
1598 } else if (basis_dir[0] != NULL) {
1599 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1600 itemizing, code);
1601 if (j == -2) {
1602 #ifndef CAN_HARDLINK_SPECIAL
1603 if (link_dest) {
1604 /* Resort to --copy-dest behavior. */
1605 } else
1606 #endif
1607 if (!copy_dest)
1608 goto cleanup;
1609 itemizing = 0;
1610 code = FNONE;
1611 } else if (j >= 0) {
1612 statret = 1;
1613 fnamecmp = fnamecmpbuf;
1614 }
1615 }
1616 if (DEBUG_GTE(GENR, 1)) {
1617 rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1618 fname, (int)file->mode,
1619 (long)major(rdev), (long)minor(rdev));
1620 }
1621 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1622 set_file_attrs(fname, file, NULL, NULL, 0);
1623 if (itemizing) {
1624 itemize(fnamecmp, file, ndx, statret, &sx,
1625 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1626 }
1627 if (code != FNONE && INFO_GTE(NAME, 1))
1628 rprintf(code, "%s\n", fname);
1629 #ifdef SUPPORT_HARD_LINKS
1630 if (preserve_hard_links && F_IS_HLINKED(file))
1631 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1632 #endif
1633 if (remove_source_files == 1)
1634 goto return_with_success;
1635 }
1636 goto cleanup;
1637 }
1638
1639 if (!S_ISREG(file->mode)) {
1640 if (solo_file)
1641 fname = f_name(file, NULL);
1642 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1643 goto cleanup;
1644 }
1645
1646 if (max_size >= 0 && F_LENGTH(file) > max_size) {
1647 if (INFO_GTE(SKIP, 1)) {
1648 if (solo_file)
1649 fname = f_name(file, NULL);
1650 rprintf(FINFO, "%s is over max-size\n", fname);
1651 }
1652 goto cleanup;
1653 }
1654 if (min_size >= 0 && F_LENGTH(file) < min_size) {
1655 if (INFO_GTE(SKIP, 1)) {
1656 if (solo_file)
1657 fname = f_name(file, NULL);
1658 rprintf(FINFO, "%s is under min-size\n", fname);
1659 }
1660 goto cleanup;
1661 }
1662
1663 if (update_only > 0 && statret == 0
1664 && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1665 if (INFO_GTE(SKIP, 1))
1666 rprintf(FINFO, "%s is newer\n", fname);
1667 #ifdef SUPPORT_HARD_LINKS
1668 if (F_IS_HLINKED(file))
1669 handle_skipped_hlink(file, itemizing, code, f_out);
1670 #endif
1671 goto cleanup;
1672 }
1673
1674 fnamecmp_type = FNAMECMP_FNAME;
1675
1676 if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1677 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1678 goto cleanup;
1679 statret = -1;
1680 stat_errno = ENOENT;
1681 }
1682
1683 if (basis_dir[0] != NULL && (statret != 0 || !copy_dest)) {
1684 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1685 statret == 0, itemizing, code);
1686 if (j == -2) {
1687 if (remove_source_files == 1)
1688 goto return_with_success;
1689 goto cleanup;
1690 }
1691 if (j >= 0) {
1692 fnamecmp = fnamecmpbuf;
1693 fnamecmp_type = j;
1694 statret = 0;
1695 }
1696 }
1697
1698 init_stat_x(&real_sx);
1699 real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1700 real_ret = statret;
1701
1702 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1703 && link_stat(partialptr, &partial_st, 0) == 0
1704 && S_ISREG(partial_st.st_mode)) {
1705 if (statret != 0)
1706 goto prepare_to_open;
1707 } else
1708 partialptr = NULL;
1709
1710 if (statret != 0 && fuzzy_basis) {
1711 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1712 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1713 if (fuzzy_file) {
1714 f_name(fuzzy_file, fnamecmpbuf);
1715 if (DEBUG_GTE(FUZZY, 1)) {
1716 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1717 fname, fnamecmpbuf);
1718 }
1719 sx.st.st_size = F_LENGTH(fuzzy_file);
1720 statret = 0;
1721 fnamecmp = fnamecmpbuf;
1722 }
1723 }
1724
1725 if (statret != 0) {
1726 #ifdef SUPPORT_HARD_LINKS
1727 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1728 cur_flist->in_progress++;
1729 goto cleanup;
1730 }
1731 #endif
1732 if (stat_errno == ENOENT)
1733 goto notify_others;
1734 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1735 full_fname(fname));
1736 goto cleanup;
1737 }
1738
1739 if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1740 ;
1741 else if (fnamecmp_type == FNAMECMP_FUZZY)
1742 ;
1743 else if (unchanged_file(fnamecmp, file, &sx.st)) {
1744 if (partialptr) {
1745 do_unlink(partialptr);
1746 handle_partial_dir(partialptr, PDIR_DELETE);
1747 }
1748 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1749 if (itemizing)
1750 itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1751 #ifdef SUPPORT_HARD_LINKS
1752 if (preserve_hard_links && F_IS_HLINKED(file))
1753 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1754 #endif
1755 if (remove_source_files != 1)
1756 goto cleanup;
1757 return_with_success:
1758 if (!dry_run)
1759 send_msg_int(MSG_SUCCESS, ndx);
1760 goto cleanup;
1761 }
1762
1763 if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1764 #ifdef SUPPORT_HARD_LINKS
1765 if (F_IS_HLINKED(file))
1766 handle_skipped_hlink(file, itemizing, code, f_out);
1767 #endif
1768 goto cleanup;
1769 }
1770
1771 prepare_to_open:
1772 if (partialptr) {
1773 sx.st = partial_st;
1774 fnamecmp = partialptr;
1775 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1776 statret = 0;
1777 }
1778
1779 if (!do_xfers)
1780 goto notify_others;
1781
1782 if (read_batch || whole_file) {
1783 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1784 if (!(backupptr = get_backup_name(fname)))
1785 goto cleanup;
1786 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1787 goto pretend_missing;
1788 if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1789 unmake_file(back_file);
1790 back_file = NULL;
1791 goto cleanup;
1792 }
1793 }
1794 goto notify_others;
1795 }
1796
1797 if (fuzzy_dirlist[0]) {
1798 int j = flist_find(fuzzy_dirlist[0], file);
1799 if (j >= 0) /* don't use changing file as future fuzzy basis */
1800 fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1801 }
1802
1803 /* open the file */
1804 if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1805 rsyserr(FERROR, errno, "failed to open %s, continuing",
1806 full_fname(fnamecmp));
1807 pretend_missing:
1808 /* pretend the file didn't exist */
1809 #ifdef SUPPORT_HARD_LINKS
1810 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1811 cur_flist->in_progress++;
1812 goto cleanup;
1813 }
1814 #endif
1815 statret = real_ret = -1;
1816 goto notify_others;
1817 }
1818
1819 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1820 if (!(backupptr = get_backup_name(fname))) {
1821 close(fd);
1822 goto cleanup;
1823 }
1824 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1825 close(fd);
1826 goto pretend_missing;
1827 }
1828 if (robust_unlink(backupptr) && errno != ENOENT) {
1829 rsyserr(FERROR_XFER, errno, "unlink %s",
1830 full_fname(backupptr));
1831 unmake_file(back_file);
1832 back_file = NULL;
1833 close(fd);
1834 goto cleanup;
1835 }
1836 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1837 rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1838 unmake_file(back_file);
1839 back_file = NULL;
1840 close(fd);
1841 goto cleanup;
1842 }
1843 fnamecmp_type = FNAMECMP_BACKUP;
1844 }
1845
1846 if (DEBUG_GTE(DELTASUM, 3)) {
1847 rprintf(FINFO, "gen mapped %s of size %s\n",
1848 fnamecmp, big_num(sx.st.st_size));
1849 }
1850
1851 if (DEBUG_GTE(DELTASUM, 2))
1852 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1853
1854 notify_others:
1855 if (remove_source_files && !delay_updates && !phase && !dry_run)
1856 increment_active_files(ndx, itemizing, code);
1857 if (inc_recurse && (!dry_run || write_batch < 0))
1858 cur_flist->in_progress++;
1859 #ifdef SUPPORT_HARD_LINKS
1860 if (preserve_hard_links && F_IS_HLINKED(file))
1861 file->flags |= FLAG_FILE_SENT;
1862 #endif
1863 write_ndx(f_out, ndx);
1864 if (itemizing) {
1865 int iflags = ITEM_TRANSFER;
1866 if (always_checksum > 0)
1867 iflags |= ITEM_REPORT_CHANGE;
1868 if (fnamecmp_type != FNAMECMP_FNAME)
1869 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1870 if (fnamecmp_type >= FNAMECMP_FUZZY)
1871 iflags |= ITEM_XNAME_FOLLOWS;
1872 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1873 fuzzy_file ? fuzzy_file->basename : NULL);
1874 free_stat_x(&real_sx);
1875 }
1876
1877 if (!do_xfers) {
1878 #ifdef SUPPORT_HARD_LINKS
1879 if (preserve_hard_links && F_IS_HLINKED(file))
1880 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1881 #endif
1882 goto cleanup;
1883 }
1884 if (read_batch)
1885 goto cleanup;
1886
1887 if (statret != 0 || whole_file)
1888 write_sum_head(f_out, NULL);
1889 else if (sx.st.st_size <= 0) {
1890 write_sum_head(f_out, NULL);
1891 close(fd);
1892 } else {
1893 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1894 rprintf(FWARNING,
1895 "WARNING: file is too large for checksum sending: %s\n",
1896 fnamecmp);
1897 write_sum_head(f_out, NULL);
1898 }
1899 close(fd);
1900 }
1901
1902 cleanup:
1903 if (back_file) {
1904 int save_preserve_xattrs = preserve_xattrs;
1905 if (f_copy >= 0)
1906 close(f_copy);
1907 #ifdef SUPPORT_XATTRS
1908 if (preserve_xattrs) {
1909 copy_xattrs(fname, backupptr);
1910 preserve_xattrs = 0;
1911 }
1912 #endif
1913 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1914 preserve_xattrs = save_preserve_xattrs;
1915 if (INFO_GTE(BACKUP, 1)) {
1916 rprintf(FINFO, "backed up %s to %s\n",
1917 fname, backupptr);
1918 }
1919 unmake_file(back_file);
1920 }
1921
1922 free_stat_x(&sx);
1923 }
1924
1925 /* If we are replacing an existing hard link, symlink, device, or special file,
1926 * create a temp-name item and rename it into place. A symlimk specifies slnk,
1927 * a hard link specifies hlnk, otherwise we create a device based on rdev.
1928 * Specify 0 for the del_for_flag if there is not a file to replace. This
1929 * returns 1 on success and 0 on failure. */
1930 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1931 dev_t rdev, stat_x *sxp, int del_for_flag)
1932 {
1933 char tmpname[MAXPATHLEN];
1934 const char *create_name;
1935 int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1936
1937 if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1938 skip_atomic = 1;
1939 else
1940 skip_atomic = 0;
1941
1942 if (del_for_flag) {
1943 if (make_backups > 0 && !dir_in_the_way) {
1944 if (!make_backup(fname, skip_atomic))
1945 return 0;
1946 } else if (skip_atomic) {
1947 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1948 if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1949 return 0;
1950 }
1951 }
1952
1953 create_name = skip_atomic ? fname : tmpname;
1954
1955 if (slnk) {
1956 #ifdef SUPPORT_LINKS
1957 if (do_symlink(slnk, create_name) < 0) {
1958 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1959 full_fname(create_name), slnk);
1960 return 0;
1961 }
1962 #else
1963 return 0;
1964 #endif
1965 } else if (hlnk) {
1966 #ifdef SUPPORT_HARD_LINKS
1967 if (!hard_link_one(file, create_name, hlnk, 0))
1968 return 0;
1969 #else
1970 return 0;
1971 #endif
1972 } else {
1973 if (do_mknod(create_name, file->mode, rdev) < 0) {
1974 rsyserr(FERROR_XFER, errno, "mknod %s failed",
1975 full_fname(create_name));
1976 return 0;
1977 }
1978 }
1979
1980 if (!skip_atomic) {
1981 if (do_rename(tmpname, fname) < 0) {
1982 rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
1983 full_fname(tmpname), full_fname(fname));
1984 do_unlink(tmpname);
1985 return 0;
1986 }
1987 }
1988
1989 return 1;
1990 }
1991
1992 #ifdef SUPPORT_HARD_LINKS
1993 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1994 enum logcode code, int f_out)
1995 {
1996 char fbuf[MAXPATHLEN];
1997 int new_last_ndx;
1998 struct file_list *save_flist = cur_flist;
1999
2000 /* If we skip the last item in a chain of links and there was a
2001 * prior non-skipped hard-link waiting to finish, finish it now. */
2002 if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2003 return;
2004
2005 file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2006 cur_flist->in_progress--; /* undo prior increment */
2007 f_name(file, fbuf);
2008 recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2009
2010 cur_flist = save_flist;
2011 }
2012 #endif
2013
2014 static void touch_up_dirs(struct file_list *flist, int ndx)
2015 {
2016 static int counter = 0;
2017 struct file_struct *file;
2018 char *fname;
2019 BOOL fix_dir_perms;
2020 int i, start, end;
2021
2022 if (ndx < 0) {
2023 start = 0;
2024 end = flist->used - 1;
2025 } else
2026 start = end = ndx;
2027
2028 /* Fix any directory permissions that were modified during the
2029 * transfer and/or re-set any tweaked modified-time values. */
2030 for (i = start; i <= end; i++, counter++) {
2031 file = flist->files[i];
2032 if (!F_IS_ACTIVE(file))
2033 continue;
2034 if (!S_ISDIR(file->mode)
2035 || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2036 continue;
2037 if (DEBUG_GTE(TIME, 2)) {
2038 fname = f_name(file, NULL);
2039 rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2040 NS(fname), i);
2041 }
2042 /* Be sure not to retouch permissions with --fake-super. */
2043 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2044 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2045 continue;
2046 fname = f_name(file, NULL);
2047 if (fix_dir_perms)
2048 do_chmod(fname, file->mode);
2049 if (need_retouch_dir_times) {
2050 STRUCT_STAT st;
2051 if (link_stat(fname, &st, 0) == 0
2052 && cmp_time(st.st_mtime, file->modtime) != 0)
2053 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
2054 }
2055 if (counter >= loopchk_limit) {
2056 if (allowed_lull)
2057 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2058 else
2059 maybe_flush_socket(0);
2060 counter = 0;
2061 }
2062 }
2063 }
2064
2065 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2066 {
2067 struct file_struct *file;
2068 struct file_list *flist;
2069 char fbuf[MAXPATHLEN];
2070 int ndx;
2071
2072 while (1) {
2073 #ifdef SUPPORT_HARD_LINKS
2074 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2075 int send_failed = (ndx == -2);
2076 if (send_failed)
2077 ndx = get_hlink_num();
2078 flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2079 file = flist->files[ndx - flist->ndx_start];
2080 assert(file->flags & FLAG_HLINKED);
2081 if (send_failed)
2082 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2083 else
2084 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2085 flist->in_progress--;
2086 continue;
2087 }
2088 #endif
2089
2090 if (check_redo && (ndx = get_redo_num()) != -1) {
2091 OFF_T save_max_size = max_size;
2092 OFF_T save_min_size = min_size;
2093 csum_length = SUM_LENGTH;
2094 max_size = -1;
2095 min_size = -1;
2096 ignore_existing = -ignore_existing;
2097 ignore_non_existing = -ignore_non_existing;
2098 update_only = -update_only;
2099 always_checksum = -always_checksum;
2100 size_only = -size_only;
2101 append_mode = -append_mode;
2102 make_backups = -make_backups; /* avoid dup backup w/inplace */
2103 ignore_times++;
2104
2105 flist = cur_flist;
2106 cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2107
2108 file = cur_flist->files[ndx - cur_flist->ndx_start];
2109 if (solo_file)
2110 strlcpy(fbuf, solo_file, sizeof fbuf);
2111 else
2112 f_name(file, fbuf);
2113 recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2114 cur_flist->to_redo--;
2115
2116 cur_flist = flist;
2117
2118 csum_length = SHORT_SUM_LENGTH;
2119 max_size = save_max_size;
2120 min_size = save_min_size;
2121 ignore_existing = -ignore_existing;
2122 ignore_non_existing = -ignore_non_existing;
2123 update_only = -update_only;
2124 always_checksum = -always_checksum;
2125 size_only = -size_only;
2126 append_mode = -append_mode;
2127 make_backups = -make_backups;
2128 ignore_times--;
2129 continue;
2130 }
2131
2132 if (cur_flist == first_flist)
2133 break;
2134
2135 /* We only get here if inc_recurse is enabled. */
2136 if (first_flist->in_progress || first_flist->to_redo)
2137 break;
2138
2139 write_ndx(sock_f_out, NDX_DONE);
2140 if (!read_batch && !flist_eof) {
2141 int old_total = 0;
2142 for (flist = first_flist; flist != cur_flist; flist = flist->next)
2143 old_total += flist->used;
2144 maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2145 }
2146
2147 if (delete_during == 2 || !dir_tweaking) {
2148 /* Skip directory touch-up. */
2149 } else if (first_flist->parent_ndx >= 0)
2150 touch_up_dirs(dir_flist, first_flist->parent_ndx);
2151
2152 flist_free(first_flist); /* updates first_flist */
2153 }
2154 }
2155
2156 void generate_files(int f_out, const char *local_name)
2157 {
2158 int i, ndx, next_loopchk = 0;
2159 char fbuf[MAXPATHLEN];
2160 int itemizing;
2161 enum logcode code;
2162 int save_info_flist = info_levels[INFO_FLIST];
2163 int save_info_progress = info_levels[INFO_PROGRESS];
2164
2165 if (protocol_version >= 29) {
2166 itemizing = 1;
2167 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2168 code = logfile_format_has_i ? FNONE : FLOG;
2169 } else if (am_daemon) {
2170 itemizing = logfile_format_has_i && do_xfers;
2171 maybe_ATTRS_REPORT = ATTRS_REPORT;
2172 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2173 } else if (!am_server) {
2174 itemizing = stdout_format_has_i;
2175 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2176 code = itemizing ? FNONE : FINFO;
2177 } else {
2178 itemizing = 0;
2179 maybe_ATTRS_REPORT = ATTRS_REPORT;
2180 code = FINFO;
2181 }
2182 solo_file = local_name;
2183 dir_tweaking = !(list_only || solo_file || dry_run);
2184 need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2185 loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2186 symlink_timeset_failed_flags = ITEM_REPORT_TIME
2187 | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2188 implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2189
2190 if (DEBUG_GTE(GENR, 1))
2191 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2192
2193 if (delete_before && !solo_file && cur_flist->used > 0)
2194 do_delete_pass();
2195 if (delete_during == 2) {
2196 deldelay_size = BIGPATHBUFLEN * 4;
2197 deldelay_buf = new_array(char, deldelay_size);
2198 if (!deldelay_buf)
2199 out_of_memory("delete-delay");
2200 }
2201 info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2202
2203 if (append_mode > 0 || whole_file < 0)
2204 whole_file = 0;
2205 if (DEBUG_GTE(FLIST, 1)) {
2206 rprintf(FINFO, "delta-transmission %s\n",
2207 whole_file
2208 ? "disabled for local transfer or --whole-file"
2209 : "enabled");
2210 }
2211
2212 dflt_perms = (ACCESSPERMS & ~orig_umask);
2213
2214 do {
2215 #ifdef SUPPORT_HARD_LINKS
2216 if (preserve_hard_links && inc_recurse) {
2217 while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2218 wait_for_receiver();
2219 }
2220 #endif
2221
2222 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2223 struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2224 if (solo_file)
2225 strlcpy(fbuf, solo_file, sizeof fbuf);
2226 else
2227 f_name(fp, fbuf);
2228 ndx = cur_flist->ndx_start - 1;
2229 recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2230 if (delete_during && dry_run < 2 && !list_only
2231 && !(fp->flags & FLAG_MISSING_DIR)) {
2232 if (fp->flags & FLAG_CONTENT_DIR) {
2233 dev_t dirdev;
2234 if (one_file_system) {
2235 uint32 *devp = F_DIR_DEV_P(fp);
2236 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2237 } else
2238 dirdev = MAKEDEV(0, 0);
2239 delete_in_dir(fbuf, fp, &dirdev);
2240 } else
2241 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2242 }
2243 }
2244 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2245 struct file_struct *file = cur_flist->sorted[i];
2246
2247 if (!F_IS_ACTIVE(file))
2248 continue;
2249
2250 if (unsort_ndx)
2251 ndx = F_NDX(file);
2252 else
2253 ndx = i + cur_flist->ndx_start;
2254
2255 if (solo_file)
2256 strlcpy(fbuf, solo_file, sizeof fbuf);
2257 else
2258 f_name(file, fbuf);
2259 recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2260
2261 check_for_finished_files(itemizing, code, 0);
2262
2263 if (i + cur_flist->ndx_start >= next_loopchk) {
2264 if (allowed_lull)
2265 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2266 else
2267 maybe_flush_socket(0);
2268 next_loopchk += loopchk_limit;
2269 }
2270 }
2271
2272 if (!inc_recurse) {
2273 write_ndx(f_out, NDX_DONE);
2274 break;
2275 }
2276
2277 while (1) {
2278 check_for_finished_files(itemizing, code, 1);
2279 if (cur_flist->next || flist_eof)
2280 break;
2281 wait_for_receiver();
2282 }
2283 } while ((cur_flist = cur_flist->next) != NULL);
2284
2285 if (delete_during)
2286 delete_in_dir(NULL, NULL, &dev_zero);
2287 phase++;
2288 if (DEBUG_GTE(GENR, 1))
2289 rprintf(FINFO, "generate_files phase=%d\n", phase);
2290
2291 while (1) {
2292 check_for_finished_files(itemizing, code, 1);
2293 if (msgdone_cnt)
2294 break;
2295 wait_for_receiver();
2296 }
2297
2298 phase++;
2299 if (DEBUG_GTE(GENR, 1))
2300 rprintf(FINFO, "generate_files phase=%d\n", phase);
2301
2302 write_ndx(f_out, NDX_DONE);
2303
2304 /* Reduce round-trip lag-time for a useless delay-updates phase. */
2305 if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2306 write_ndx(f_out, NDX_DONE);
2307
2308 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2309 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2310 write_del_stats(f_out);
2311 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2312 write_ndx(f_out, NDX_DONE);
2313 }
2314
2315 /* Read MSG_DONE for the redo phase (and any prior messages). */
2316 while (1) {
2317 check_for_finished_files(itemizing, code, 0);
2318 if (msgdone_cnt > 1)
2319 break;
2320 wait_for_receiver();
2321 }
2322
2323 if (protocol_version >= 29) {
2324 phase++;
2325 if (DEBUG_GTE(GENR, 1))
2326 rprintf(FINFO, "generate_files phase=%d\n", phase);
2327 if (!EARLY_DELAY_DONE_MSG()) {
2328 write_ndx(f_out, NDX_DONE);
2329 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2330 write_ndx(f_out, NDX_DONE);
2331 }
2332 /* Read MSG_DONE for delay-updates phase & prior messages. */
2333 while (msgdone_cnt == 2)
2334 wait_for_receiver();
2335 }
2336
2337 info_levels[INFO_FLIST] = save_info_flist;
2338 info_levels[INFO_PROGRESS] = save_info_progress;
2339
2340 if (delete_during == 2)
2341 do_delayed_deletions(fbuf);
2342 if (delete_after && !solo_file && file_total > 0)
2343 do_delete_pass();
2344
2345 if (max_delete >= 0 && skipped_deletes) {
2346 rprintf(FWARNING,
2347 "Deletions stopped due to --max-delete limit (%d skipped)\n",
2348 skipped_deletes);
2349 io_error |= IOERR_DEL_LIMIT;
2350 }
2351
2352 if (protocol_version >= 31) {
2353 if (!EARLY_DELETE_DONE_MSG()) {
2354 if (INFO_GTE(STATS, 2) || read_batch)
2355 write_del_stats(f_out);
2356 write_ndx(f_out, NDX_DONE);
2357 }
2358
2359 /* Read MSG_DONE for late-delete phase & prior messages. */
2360 while (msgdone_cnt == 3)
2361 wait_for_receiver();
2362 }
2363
2364 if ((need_retouch_dir_perms || need_retouch_dir_times)
2365 && dir_tweaking && (!inc_recurse || delete_during == 2))
2366 touch_up_dirs(dir_flist, -1);
2367
2368 if (DEBUG_GTE(GENR, 1))
2369 rprintf(FINFO, "generate_files finished\n");
2370 }
rsync: a fast, versatile, remote (and local) file-copying tool