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Fix a comment.
[rsync/qnx.git] / generator.c
blob631a559e5c2b3e7d16b130caa0acdd607cfad555
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) 2003-2009 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 safe_symlinks;
85 extern long block_size; /* "long" because popt can't set an int32. */
86 extern int unsort_ndx;
87 extern int max_delete;
88 extern int force_delete;
89 extern int one_file_system;
90 extern int skipped_deletes;
91 extern dev_t filesystem_dev;
92 extern mode_t orig_umask;
93 extern uid_t our_uid;
94 extern char *tmpdir;
95 extern char *basis_dir[MAX_BASIS_DIRS+1];
96 extern struct file_list *cur_flist, *first_flist, *dir_flist;
97 extern filter_rule_list filter_list, daemon_filter_list;
98
99 int maybe_ATTRS_REPORT = 0;
100
101 static dev_t dev_zero;
102 static int deldelay_size = 0, deldelay_cnt = 0;
103 static char *deldelay_buf = NULL;
104 static int deldelay_fd = -1;
105 static int loopchk_limit;
106 static int dir_tweaking;
107 static int symlink_timeset_failed_flags;
108 static int need_retouch_dir_times;
109 static int need_retouch_dir_perms;
110 static const char *solo_file = NULL;
111
112 enum nonregtype {
113 TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
114 };
115
116 /* Forward declarations. */
117 #ifdef SUPPORT_HARD_LINKS
118 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
119 enum logcode code, int f_out);
120 #endif
121
122 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
123 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
124
125 static int start_delete_delay_temp(void)
126 {
127 char fnametmp[MAXPATHLEN];
128 int save_dry_run = dry_run;
129
130 dry_run = 0;
131 if (!get_tmpname(fnametmp, "deldelay", False)
132 || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
133 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
134 inc_recurse ? "" : " -- switching to --delete-after");
135 delete_during = 0;
136 delete_after = !inc_recurse;
137 dry_run = save_dry_run;
138 return 0;
139 }
140 unlink(fnametmp);
141 dry_run = save_dry_run;
142 return 1;
143 }
144
145 static int flush_delete_delay(void)
146 {
147 if (deldelay_fd < 0 && !start_delete_delay_temp())
148 return 0;
149 if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
150 rsyserr(FERROR, errno, "flush of delete-delay buffer");
151 delete_during = 0;
152 delete_after = !inc_recurse;
153 close(deldelay_fd);
154 return 0;
155 }
156 deldelay_cnt = 0;
157 return 1;
158 }
159
160 static int remember_delete(struct file_struct *file, const char *fname, int flags)
161 {
162 int len;
163
164 if (deldelay_cnt == deldelay_size && !flush_delete_delay())
165 return 0;
166
167 if (flags & DEL_NO_UID_WRITE)
168 deldelay_buf[deldelay_cnt++] = '!';
169
170 while (1) {
171 len = snprintf(deldelay_buf + deldelay_cnt,
172 deldelay_size - deldelay_cnt,
173 "%x %s%c",
174 (int)file->mode, fname, '\0');
175 if ((deldelay_cnt += len) <= deldelay_size)
176 break;
177 deldelay_cnt -= len;
178 if (!flush_delete_delay())
179 return 0;
180 }
181
182 return 1;
183 }
184
185 static int read_delay_line(char *buf, int *flags_p)
186 {
187 static int read_pos = 0;
188 int j, len, mode;
189 char *bp, *past_space;
190
191 while (1) {
192 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
193 if (j < deldelay_cnt)
194 break;
195 if (deldelay_fd < 0) {
196 if (j > read_pos)
197 goto invalid_data;
198 return -1;
199 }
200 deldelay_cnt -= read_pos;
201 if (deldelay_cnt == deldelay_size)
202 goto invalid_data;
203 if (deldelay_cnt && read_pos) {
204 memmove(deldelay_buf, deldelay_buf + read_pos,
205 deldelay_cnt);
206 }
207 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
208 deldelay_size - deldelay_cnt);
209 if (len == 0) {
210 if (deldelay_cnt) {
211 rprintf(FERROR,
212 "ERROR: unexpected EOF in delete-delay file.\n");
213 }
214 return -1;
215 }
216 if (len < 0) {
217 rsyserr(FERROR, errno,
218 "reading delete-delay file");
219 return -1;
220 }
221 deldelay_cnt += len;
222 read_pos = 0;
223 }
224
225 bp = deldelay_buf + read_pos;
226 if (*bp == '!') {
227 bp++;
228 *flags_p = DEL_NO_UID_WRITE;
229 } else
230 *flags_p = 0;
231
232 if (sscanf(bp, "%x ", &mode) != 1) {
233 invalid_data:
234 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
235 return -1;
236 }
237 past_space = strchr(bp, ' ') + 1;
238 len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
239 read_pos = j + 1;
240
241 if (len > MAXPATHLEN) {
242 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
243 return -1;
244 }
245
246 /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
247 * instead of returning a pointer to our buffer. */
248 memcpy(buf, past_space, len);
249
250 return mode;
251 }
252
253 static void do_delayed_deletions(char *delbuf)
254 {
255 int mode, flags;
256
257 if (deldelay_fd >= 0) {
258 if (deldelay_cnt && !flush_delete_delay())
259 return;
260 lseek(deldelay_fd, 0, 0);
261 }
262 while ((mode = read_delay_line(delbuf, &flags)) >= 0)
263 delete_item(delbuf, mode, flags | DEL_RECURSE);
264 if (deldelay_fd >= 0)
265 close(deldelay_fd);
266 }
267
268 /* This function is used to implement per-directory deletion, and is used by
269 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
270 * MAXPATHLEN buffer with the name of the directory in it (the functions we
271 * call will append names onto the end, but the old dir value will be restored
272 * on exit). */
273 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
274 {
275 static int already_warned = 0;
276 struct file_list *dirlist;
277 char delbuf[MAXPATHLEN];
278 int dlen, i;
279
280 if (!fbuf) {
281 change_local_filter_dir(NULL, 0, 0);
282 return;
283 }
284
285 if (DEBUG_GTE(DEL, 2))
286 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
287
288 if (allowed_lull)
289 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
290
291 if (io_error & IOERR_GENERAL && !ignore_errors) {
292 if (already_warned)
293 return;
294 rprintf(FINFO,
295 "IO error encountered -- skipping file deletion\n");
296 already_warned = 1;
297 return;
298 }
299
300 dlen = strlen(fbuf);
301 change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
302
303 if (one_file_system) {
304 if (file->flags & FLAG_TOP_DIR)
305 filesystem_dev = *fs_dev;
306 else if (filesystem_dev != *fs_dev)
307 return;
308 }
309
310 dirlist = get_dirlist(fbuf, dlen, 0);
311
312 /* If an item in dirlist is not found in flist, delete it
313 * from the filesystem. */
314 for (i = dirlist->used; i--; ) {
315 struct file_struct *fp = dirlist->files[i];
316 if (!F_IS_ACTIVE(fp))
317 continue;
318 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
319 if (INFO_GTE(MOUNT, 1))
320 rprintf(FINFO, "cannot delete mount point: %s\n",
321 f_name(fp, NULL));
322 continue;
323 }
324 /* Here we want to match regardless of file type. Replacement
325 * of a file with one of another type is handled separately by
326 * a delete_item call with a DEL_MAKE_ROOM flag. */
327 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
328 int flags = DEL_RECURSE;
329 if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
330 flags |= DEL_NO_UID_WRITE;
331 f_name(fp, delbuf);
332 if (delete_during == 2) {
333 if (!remember_delete(fp, delbuf, flags))
334 break;
335 } else
336 delete_item(delbuf, fp->mode, flags);
337 }
338 }
339
340 flist_free(dirlist);
341 }
342
343 /* This deletes any files on the receiving side that are not present on the
344 * sending side. This is used by --delete-before and --delete-after. */
345 static void do_delete_pass(void)
346 {
347 char fbuf[MAXPATHLEN];
348 STRUCT_STAT st;
349 int j;
350
351 /* dry_run is incremented when the destination doesn't exist yet. */
352 if (dry_run > 1 || list_only)
353 return;
354
355 for (j = 0; j < cur_flist->used; j++) {
356 struct file_struct *file = cur_flist->sorted[j];
357
358 f_name(file, fbuf);
359
360 if (!(file->flags & FLAG_CONTENT_DIR)) {
361 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
362 continue;
363 }
364
365 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
366 rprintf(FINFO, "deleting in %s\n", fbuf);
367
368 if (link_stat(fbuf, &st, keep_dirlinks) < 0
369 || !S_ISDIR(st.st_mode))
370 continue;
371
372 delete_in_dir(fbuf, file, &st.st_dev);
373 }
374 delete_in_dir(NULL, NULL, &dev_zero);
375
376 if (INFO_GTE(FLIST, 2) && !am_server)
377 rprintf(FINFO, " \r");
378 }
379
380 static inline int time_differs(struct file_struct *file, stat_x *sxp)
381 {
382 return cmp_time(sxp->st.st_mtime, file->modtime);
383 }
384
385 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
386 {
387 if (preserve_perms)
388 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
389
390 if (preserve_executability)
391 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
392
393 return 0;
394 }
395
396 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
397 {
398 if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
399 return 1;
400
401 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
402 return 1;
403
404 return 0;
405 }
406
407 #ifdef SUPPORT_ACLS
408 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
409 {
410 if (preserve_acls) {
411 if (!ACL_READY(*sxp))
412 get_acl(fname, sxp);
413 if (set_acl(NULL, file, sxp, file->mode))
414 return 1;
415 }
416
417 return 0;
418 }
419 #endif
420
421 #ifdef SUPPORT_XATTRS
422 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
423 {
424 if (preserve_xattrs) {
425 if (!XATTR_READY(*sxp))
426 get_xattr(fname, sxp);
427 if (xattr_diff(file, sxp, 0))
428 return 1;
429 }
430
431 return 0;
432 }
433 #endif
434
435 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
436 {
437 if (S_ISLNK(file->mode)) {
438 #ifdef CAN_SET_SYMLINK_TIMES
439 if (preserve_times & PRESERVE_LINK_TIMES && time_differs(file, sxp))
440 return 0;
441 #endif
442 #ifdef CAN_CHMOD_SYMLINK
443 if (perms_differ(file, sxp))
444 return 0;
445 #endif
446 #ifdef CAN_CHOWN_SYMLINK
447 if (ownership_differs(file, sxp))
448 return 0;
449 #endif
450 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
451 if (acls_differ(fname, file, sxp))
452 return 0;
453 #endif
454 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
455 if (xattrs_differ(fname, file, sxp))
456 return 0;
457 #endif
458 } else {
459 if (preserve_times && time_differs(file, sxp))
460 return 0;
461 if (perms_differ(file, sxp))
462 return 0;
463 if (ownership_differs(file, sxp))
464 return 0;
465 #ifdef SUPPORT_ACLS
466 if (acls_differ(fname, file, sxp))
467 return 0;
468 #endif
469 #ifdef SUPPORT_XATTRS
470 if (xattrs_differ(fname, file, sxp))
471 return 0;
472 #endif
473 }
474
475 return 1;
476 }
477
478 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
479 stat_x *sxp, int32 iflags, uchar fnamecmp_type,
480 const char *xname)
481 {
482 if (statret >= 0) { /* A from-dest-dir statret can == 1! */
483 int keep_time = !preserve_times ? 0
484 : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
485 : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
486 : 1;
487
488 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
489 iflags |= ITEM_REPORT_SIZE;
490 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
491 if (iflags & ITEM_LOCAL_CHANGE)
492 iflags |= symlink_timeset_failed_flags;
493 } else if (keep_time
494 ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
495 : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
496 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
497 iflags |= ITEM_REPORT_TIME;
498 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
499 if (S_ISLNK(file->mode)) {
500 ;
501 } else
502 #endif
503 if (preserve_perms) {
504 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
505 iflags |= ITEM_REPORT_PERMS;
506 } else if (preserve_executability
507 && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
508 iflags |= ITEM_REPORT_PERMS;
509 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
510 iflags |= ITEM_REPORT_OWNER;
511 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
512 && sxp->st.st_gid != (gid_t)F_GROUP(file))
513 iflags |= ITEM_REPORT_GROUP;
514 #ifdef SUPPORT_ACLS
515 if (preserve_acls && !S_ISLNK(file->mode)) {
516 if (!ACL_READY(*sxp))
517 get_acl(fnamecmp, sxp);
518 if (set_acl(NULL, file, sxp, file->mode))
519 iflags |= ITEM_REPORT_ACL;
520 }
521 #endif
522 #ifdef SUPPORT_XATTRS
523 if (preserve_xattrs) {
524 if (!XATTR_READY(*sxp))
525 get_xattr(fnamecmp, sxp);
526 if (xattr_diff(file, sxp, 1))
527 iflags |= ITEM_REPORT_XATTR;
528 }
529 #endif
530 } else {
531 #ifdef SUPPORT_XATTRS
532 if (preserve_xattrs && xattr_diff(file, NULL, 1))
533 iflags |= ITEM_REPORT_XATTR;
534 #endif
535 iflags |= ITEM_IS_NEW;
536 }
537
538 iflags &= 0xffff;
539 if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
540 || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
541 if (protocol_version >= 29) {
542 if (ndx >= 0)
543 write_ndx(sock_f_out, ndx);
544 write_shortint(sock_f_out, iflags);
545 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
546 write_byte(sock_f_out, fnamecmp_type);
547 if (iflags & ITEM_XNAME_FOLLOWS)
548 write_vstring(sock_f_out, xname, strlen(xname));
549 #ifdef SUPPORT_XATTRS
550 if (preserve_xattrs && do_xfers
551 && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
552 int fd = iflags & ITEM_REPORT_XATTR
553 && (protocol_version < 31 || !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
554 ? sock_f_out : -1;
555 send_xattr_request(NULL, file, fd);
556 }
557 #endif
558 } else if (ndx >= 0) {
559 enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
560 log_item(code, file, iflags, xname);
561 }
562 }
563 }
564
565
566 /* Perform our quick-check heuristic for determining if a file is unchanged. */
567 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
568 {
569 if (st->st_size != F_LENGTH(file))
570 return 0;
571
572 /* if always checksum is set then we use the checksum instead
573 of the file time to determine whether to sync */
574 if (always_checksum > 0 && S_ISREG(st->st_mode)) {
575 char sum[MAX_DIGEST_LEN];
576 file_checksum(fn, sum, st->st_size);
577 return memcmp(sum, F_SUM(file), checksum_len) == 0;
578 }
579
580 if (size_only > 0)
581 return 1;
582
583 if (ignore_times)
584 return 0;
585
586 return cmp_time(st->st_mtime, file->modtime) == 0;
587 }
588
589
590 /*
591 * set (initialize) the size entries in the per-file sum_struct
592 * calculating dynamic block and checksum sizes.
593 *
594 * This is only called from generate_and_send_sums() but is a separate
595 * function to encapsulate the logic.
596 *
597 * The block size is a rounded square root of file length.
598 *
599 * The checksum size is determined according to:
600 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
601 * provided by Donovan Baarda which gives a probability of rsync
602 * algorithm corrupting data and falling back using the whole md4
603 * checksums.
604 *
605 * This might be made one of several selectable heuristics.
606 */
607 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
608 {
609 int32 blength;
610 int s2length;
611 int64 l;
612
613 if (len < 0) {
614 /* The file length overflowed our int64 var, so we can't process this file. */
615 sum->count = -1; /* indicate overflow error */
616 return;
617 }
618
619 if (block_size)
620 blength = block_size;
621 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
622 blength = BLOCK_SIZE;
623 else {
624 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
625 int32 c;
626 int cnt;
627 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
628 if (c < 0 || c >= max_blength)
629 blength = max_blength;
630 else {
631 blength = 0;
632 do {
633 blength |= c;
634 if (len < (int64)blength * blength)
635 blength &= ~c;
636 c >>= 1;
637 } while (c >= 8); /* round to multiple of 8 */
638 blength = MAX(blength, BLOCK_SIZE);
639 }
640 }
641
642 if (protocol_version < 27) {
643 s2length = csum_length;
644 } else if (csum_length == SUM_LENGTH) {
645 s2length = SUM_LENGTH;
646 } else {
647 int32 c;
648 int b = BLOCKSUM_BIAS;
649 for (l = len; l >>= 1; b += 2) {}
650 for (c = blength; (c >>= 1) && b; b--) {}
651 /* add a bit, subtract rollsum, round up. */
652 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
653 s2length = MAX(s2length, csum_length);
654 s2length = MIN(s2length, SUM_LENGTH);
655 }
656
657 sum->flength = len;
658 sum->blength = blength;
659 sum->s2length = s2length;
660 sum->remainder = (int32)(len % blength);
661 sum->count = (int32)(l = (len / blength) + (sum->remainder != 0));
662
663 if ((int64)sum->count != l)
664 sum->count = -1;
665
666 if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
667 rprintf(FINFO,
668 "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
669 big_num(sum->count), (long)sum->remainder, (long)sum->blength,
670 sum->s2length, big_num(sum->flength));
671 }
672 }
673
674
675 /*
676 * Generate and send a stream of signatures/checksums that describe a buffer
677 *
678 * Generate approximately one checksum every block_len bytes.
679 */
680 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
681 {
682 int32 i;
683 struct map_struct *mapbuf;
684 struct sum_struct sum;
685 OFF_T offset = 0;
686
687 sum_sizes_sqroot(&sum, len);
688 if (sum.count < 0)
689 return -1;
690 write_sum_head(f_out, &sum);
691
692 if (append_mode > 0 && f_copy < 0)
693 return 0;
694
695 if (len > 0)
696 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
697 else
698 mapbuf = NULL;
699
700 for (i = 0; i < sum.count; i++) {
701 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
702 char *map = map_ptr(mapbuf, offset, n1);
703 char sum2[SUM_LENGTH];
704 uint32 sum1;
705
706 len -= n1;
707 offset += n1;
708
709 if (f_copy >= 0) {
710 full_write(f_copy, map, n1);
711 if (append_mode > 0)
712 continue;
713 }
714
715 sum1 = get_checksum1(map, n1);
716 get_checksum2(map, n1, sum2);
717
718 if (DEBUG_GTE(DELTASUM, 3)) {
719 rprintf(FINFO,
720 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
721 big_num(i), big_num(offset - n1), (long)n1,
722 (unsigned long)sum1);
723 }
724 write_int(f_out, sum1);
725 write_buf(f_out, sum2, sum.s2length);
726 }
727
728 if (mapbuf)
729 unmap_file(mapbuf);
730
731 return 0;
732 }
733
734
735 /* Try to find a filename in the same dir as "fname" with a similar name. */
736 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
737 {
738 int fname_len, fname_suf_len;
739 const char *fname_suf, *fname = file->basename;
740 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
741 int j, lowest_j = -1;
742
743 fname_len = strlen(fname);
744 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
745
746 for (j = 0; j < dirlist->used; j++) {
747 struct file_struct *fp = dirlist->files[j];
748 const char *suf, *name;
749 int len, suf_len;
750 uint32 dist;
751
752 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
753 || fp->flags & FLAG_FILE_SENT)
754 continue;
755
756 name = fp->basename;
757
758 if (F_LENGTH(fp) == F_LENGTH(file)
759 && cmp_time(fp->modtime, file->modtime) == 0) {
760 if (DEBUG_GTE(FUZZY, 2)) {
761 rprintf(FINFO,
762 "fuzzy size/modtime match for %s\n",
763 name);
764 }
765 return j;
766 }
767
768 len = strlen(name);
769 suf = find_filename_suffix(name, len, &suf_len);
770
771 dist = fuzzy_distance(name, len, fname, fname_len);
772 /* Add some extra weight to how well the suffixes match. */
773 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
774 * 10;
775 if (DEBUG_GTE(FUZZY, 2)) {
776 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
777 name, (int)(dist>>16), (int)(dist&0xFFFF));
778 }
779 if (dist <= lowest_dist) {
780 lowest_dist = dist;
781 lowest_j = j;
782 }
783 }
784
785 return lowest_j;
786 }
787
788 /* Copy a file found in our --copy-dest handling. */
789 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
790 {
791 char buf[MAXPATHLEN];
792 const char *copy_to, *partialptr;
793 int save_preserve_xattrs = preserve_xattrs;
794 int ok, fd_w;
795
796 if (inplace) {
797 /* Let copy_file open the destination in place. */
798 fd_w = -1;
799 copy_to = dest;
800 } else {
801 fd_w = open_tmpfile(buf, dest, file);
802 if (fd_w < 0)
803 return -1;
804 copy_to = buf;
805 }
806 cleanup_set(copy_to, NULL, NULL, -1, -1);
807 if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
808 if (INFO_GTE(COPY, 1)) {
809 rsyserr(FINFO, errno, "copy_file %s => %s",
810 full_fname(src), copy_to);
811 }
812 /* Try to clean up. */
813 unlink(copy_to);
814 cleanup_disable();
815 return -1;
816 }
817 partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
818 preserve_xattrs = 0; /* xattrs were copied with file */
819 ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
820 preserve_xattrs = save_preserve_xattrs;
821 cleanup_disable();
822 return ok ? 0 : -1;
823 }
824
825 /* This is only called for regular files. We return -2 if we've finished
826 * handling the file, -1 if no dest-linking occurred, or a non-negative
827 * value if we found an alternate basis file. */
828 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
829 char *cmpbuf, stat_x *sxp, int itemizing,
830 enum logcode code)
831 {
832 int best_match = -1;
833 int match_level = 0;
834 int j = 0;
835
836 do {
837 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
838 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
839 continue;
840 switch (match_level) {
841 case 0:
842 best_match = j;
843 match_level = 1;
844 /* FALL THROUGH */
845 case 1:
846 if (!unchanged_file(cmpbuf, file, &sxp->st))
847 continue;
848 best_match = j;
849 match_level = 2;
850 /* FALL THROUGH */
851 case 2:
852 if (!unchanged_attrs(cmpbuf, file, sxp))
853 continue;
854 best_match = j;
855 match_level = 3;
856 break;
857 }
858 break;
859 } while (basis_dir[++j] != NULL);
860
861 if (!match_level)
862 return -1;
863
864 if (j != best_match) {
865 j = best_match;
866 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
867 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
868 return -1;
869 }
870
871 if (match_level == 3 && !copy_dest) {
872 #ifdef SUPPORT_HARD_LINKS
873 if (link_dest) {
874 if (!hard_link_one(file, fname, cmpbuf, 1))
875 goto try_a_copy;
876 if (preserve_hard_links && F_IS_HLINKED(file))
877 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
878 if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
879 itemize(cmpbuf, file, ndx, 1, sxp,
880 ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
881 0, "");
882 }
883 } else
884 #endif
885 if (itemizing)
886 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
887 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
888 rprintf(FCLIENT, "%s is uptodate\n", fname);
889 return -2;
890 }
891
892 if (match_level >= 2) {
893 #ifdef SUPPORT_HARD_LINKS
894 try_a_copy: /* Copy the file locally. */
895 #endif
896 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
897 return -1;
898 if (itemizing)
899 itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
900 if (maybe_ATTRS_REPORT
901 && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
902 || (INFO_GTE(NAME, 2) && match_level == 3))) {
903 code = match_level == 3 ? FCLIENT : FINFO;
904 rprintf(code, "%s%s\n", fname,
905 match_level == 3 ? " is uptodate" : "");
906 }
907 #ifdef SUPPORT_HARD_LINKS
908 if (preserve_hard_links && F_IS_HLINKED(file))
909 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
910 #endif
911 return -2;
912 }
913
914 return FNAMECMP_BASIS_DIR_LOW + j;
915 }
916
917 /* This is only called for non-regular files. We return -2 if we've finished
918 * handling the file, or -1 if no dest-linking occurred, or a non-negative
919 * value if we found an alternate basis file. */
920 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
921 char *cmpbuf, stat_x *sxp, int itemizing,
922 enum logcode code)
923 {
924 int best_match = -1;
925 int match_level = 0;
926 enum nonregtype type;
927 uint32 *devp;
928 #ifdef SUPPORT_LINKS
929 char lnk[MAXPATHLEN];
930 int len;
931 #endif
932 int j = 0;
933
934 #ifndef SUPPORT_LINKS
935 if (S_ISLNK(file->mode))
936 return -1;
937 #endif
938 if (S_ISDIR(file->mode)) {
939 type = TYPE_DIR;
940 } else if (IS_SPECIAL(file->mode))
941 type = TYPE_SPECIAL;
942 else if (IS_DEVICE(file->mode))
943 type = TYPE_DEVICE;
944 #ifdef SUPPORT_LINKS
945 else if (S_ISLNK(file->mode))
946 type = TYPE_SYMLINK;
947 #endif
948 else {
949 rprintf(FERROR,
950 "internal: try_dests_non() called with invalid mode (%o)\n",
951 (int)file->mode);
952 exit_cleanup(RERR_UNSUPPORTED);
953 }
954
955 do {
956 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
957 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
958 continue;
959 switch (type) {
960 case TYPE_DIR:
961 if (!S_ISDIR(sxp->st.st_mode))
962 continue;
963 break;
964 case TYPE_SPECIAL:
965 if (!IS_SPECIAL(sxp->st.st_mode))
966 continue;
967 break;
968 case TYPE_DEVICE:
969 if (!IS_DEVICE(sxp->st.st_mode))
970 continue;
971 break;
972 case TYPE_SYMLINK:
973 #ifdef SUPPORT_LINKS
974 if (!S_ISLNK(sxp->st.st_mode))
975 continue;
976 break;
977 #else
978 return -1;
979 #endif
980 }
981 if (match_level < 1) {
982 match_level = 1;
983 best_match = j;
984 }
985 switch (type) {
986 case TYPE_DIR:
987 case TYPE_SPECIAL:
988 break;
989 case TYPE_DEVICE:
990 devp = F_RDEV_P(file);
991 if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
992 continue;
993 break;
994 case TYPE_SYMLINK:
995 #ifdef SUPPORT_LINKS
996 if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
997 continue;
998 lnk[len] = '\0';
999 if (strcmp(lnk, F_SYMLINK(file)) != 0)
1000 continue;
1001 break;
1002 #else
1003 return -1;
1004 #endif
1005 }
1006 if (match_level < 2) {
1007 match_level = 2;
1008 best_match = j;
1009 }
1010 if (unchanged_attrs(cmpbuf, file, sxp)) {
1011 match_level = 3;
1012 best_match = j;
1013 break;
1014 }
1015 } while (basis_dir[++j] != NULL);
1016
1017 if (!match_level)
1018 return -1;
1019
1020 if (j != best_match) {
1021 j = best_match;
1022 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1023 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1024 return -1;
1025 }
1026
1027 if (match_level == 3) {
1028 #ifdef SUPPORT_HARD_LINKS
1029 if (link_dest
1030 #ifndef CAN_HARDLINK_SYMLINK
1031 && !S_ISLNK(file->mode)
1032 #endif
1033 #ifndef CAN_HARDLINK_SPECIAL
1034 && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1035 #endif
1036 && !S_ISDIR(file->mode)) {
1037 if (do_link(cmpbuf, fname) < 0) {
1038 rsyserr(FERROR_XFER, errno,
1039 "failed to hard-link %s with %s",
1040 cmpbuf, fname);
1041 return j;
1042 }
1043 if (preserve_hard_links && F_IS_HLINKED(file))
1044 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1045 } else
1046 #endif
1047 match_level = 2;
1048 if (itemizing && stdout_format_has_i
1049 && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1050 int chg = compare_dest && type != TYPE_DIR ? 0
1051 : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1052 char *lp = match_level == 3 ? "" : NULL;
1053 itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1054 }
1055 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1056 rprintf(FCLIENT, "%s%s is uptodate\n",
1057 fname, type == TYPE_DIR ? "/" : "");
1058 }
1059 return -2;
1060 }
1061
1062 return j;
1063 }
1064
1065 static void list_file_entry(struct file_struct *f)
1066 {
1067 char permbuf[PERMSTRING_SIZE];
1068 int64 len;
1069 int colwidth = human_readable ? 14 : 11;
1070
1071 if (!F_IS_ACTIVE(f)) {
1072 /* this can happen if duplicate names were removed */
1073 return;
1074 }
1075
1076 permstring(permbuf, f->mode);
1077 len = F_LENGTH(f);
1078
1079 /* TODO: indicate '+' if the entry has an ACL. */
1080
1081 #ifdef SUPPORT_LINKS
1082 if (preserve_links && S_ISLNK(f->mode)) {
1083 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1084 permbuf, colwidth, human_num(len),
1085 timestring(f->modtime), f_name(f, NULL),
1086 F_SYMLINK(f));
1087 } else
1088 #endif
1089 if (missing_args == 2 && f->mode == 0) {
1090 rprintf(FINFO, "%-*s %s\n",
1091 colwidth + 31, "*missing",
1092 f_name(f, NULL));
1093 } else {
1094 rprintf(FINFO, "%s %*s %s %s\n",
1095 permbuf, colwidth, human_num(len),
1096 timestring(f->modtime), f_name(f, NULL));
1097 }
1098 }
1099
1100 static int phase = 0;
1101 static int dflt_perms;
1102
1103 static int implied_dirs_are_missing;
1104 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1105 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1106 {
1107 return F_DEPTH(file) > F_DEPTH(subtree)
1108 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1109 }
1110
1111 /* Acts on the indicated item in cur_flist whose name is fname. If a dir,
1112 * make sure it exists, and has the right permissions/timestamp info. For
1113 * all other non-regular files (symlinks, etc.) we create them here. For
1114 * regular files that have changed, we try to find a basis file and then
1115 * start sending checksums. The ndx is the file's unique index value.
1116 *
1117 * The fname parameter must point to a MAXPATHLEN buffer! (e.g it gets
1118 * passed to delete_item(), which can use it during a recursive delete.)
1119 *
1120 * Note that f_out is set to -1 when doing final directory-permission and
1121 * modification-time repair. */
1122 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1123 int itemizing, enum logcode code, int f_out)
1124 {
1125 static const char *parent_dirname = "";
1126 /* Missing dir not created due to --dry-run; will still be scanned. */
1127 static struct file_struct *dry_missing_dir = NULL;
1128 /* Missing dir whose contents are skipped altogether due to
1129 * --ignore-non-existing, daemon exclude, or mkdir failure. */
1130 static struct file_struct *skip_dir = NULL;
1131 static struct file_list *fuzzy_dirlist = NULL;
1132 static int need_fuzzy_dirlist = 0;
1133 struct file_struct *fuzzy_file = NULL;
1134 int fd = -1, f_copy = -1;
1135 stat_x sx, real_sx;
1136 STRUCT_STAT partial_st;
1137 struct file_struct *back_file = NULL;
1138 int statret, real_ret, stat_errno;
1139 char *fnamecmp, *partialptr, *backupptr = NULL;
1140 char fnamecmpbuf[MAXPATHLEN];
1141 uchar fnamecmp_type;
1142 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1143 int is_dir = !S_ISDIR(file->mode) ? 0
1144 : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1145 : 1;
1146
1147 if (DEBUG_GTE(GENR, 1))
1148 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1149
1150 if (list_only) {
1151 if (is_dir < 0
1152 || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1153 return;
1154 list_file_entry(file);
1155 return;
1156 }
1157
1158 if (skip_dir) {
1159 if (is_below(file, skip_dir)) {
1160 if (is_dir)
1161 file->flags |= FLAG_MISSING_DIR;
1162 #ifdef SUPPORT_HARD_LINKS
1163 else if (F_IS_HLINKED(file))
1164 handle_skipped_hlink(file, itemizing, code, f_out);
1165 #endif
1166 return;
1167 }
1168 skip_dir = NULL;
1169 }
1170
1171 init_stat_x(&sx);
1172 if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1173 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1174 if (is_dir < 0)
1175 return;
1176 #ifdef SUPPORT_HARD_LINKS
1177 if (F_IS_HLINKED(file))
1178 handle_skipped_hlink(file, itemizing, code, f_out);
1179 #endif
1180 rprintf(FERROR_XFER,
1181 "ERROR: daemon refused to receive %s \"%s\"\n",
1182 is_dir ? "directory" : "file", fname);
1183 if (is_dir)
1184 goto skipping_dir_contents;
1185 return;
1186 }
1187 }
1188
1189 if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1190 parent_is_dry_missing:
1191 if (fuzzy_dirlist) {
1192 flist_free(fuzzy_dirlist);
1193 fuzzy_dirlist = NULL;
1194 }
1195 parent_dirname = "";
1196 statret = -1;
1197 stat_errno = ENOENT;
1198 } else {
1199 const char *dn = file->dirname ? file->dirname : ".";
1200 dry_missing_dir = NULL;
1201 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1202 if (relative_paths && !implied_dirs
1203 && do_stat(dn, &sx.st) < 0) {
1204 if (dry_run)
1205 goto parent_is_dry_missing;
1206 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1207 rsyserr(FERROR_XFER, errno,
1208 "recv_generator: mkdir %s failed",
1209 full_fname(dn));
1210 }
1211 }
1212 if (fuzzy_dirlist) {
1213 flist_free(fuzzy_dirlist);
1214 fuzzy_dirlist = NULL;
1215 }
1216 if (fuzzy_basis)
1217 need_fuzzy_dirlist = 1;
1218 #ifdef SUPPORT_ACLS
1219 if (!preserve_perms)
1220 dflt_perms = default_perms_for_dir(dn);
1221 #endif
1222 }
1223 parent_dirname = dn;
1224
1225 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1226 strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1227 fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1228 need_fuzzy_dirlist = 0;
1229 }
1230
1231 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1232 stat_errno = errno;
1233 }
1234
1235 if (missing_args == 2 && file->mode == 0) {
1236 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1237 return;
1238 if (statret == 0)
1239 delete_item(fname, sx.st.st_mode, del_opts);
1240 return;
1241 }
1242
1243 if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1244 if (is_dir) {
1245 if (is_dir < 0)
1246 return;
1247 skip_dir = file;
1248 file->flags |= FLAG_MISSING_DIR;
1249 }
1250 #ifdef SUPPORT_HARD_LINKS
1251 else if (F_IS_HLINKED(file))
1252 handle_skipped_hlink(file, itemizing, code, f_out);
1253 #endif
1254 if (INFO_GTE(SKIP, 1)) {
1255 rprintf(FINFO, "not creating new %s \"%s\"\n",
1256 is_dir ? "directory" : "file", fname);
1257 }
1258 return;
1259 }
1260
1261 if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1262 && !am_root && sx.st.st_uid == our_uid)
1263 del_opts |= DEL_NO_UID_WRITE;
1264
1265 if (ignore_existing > 0 && statret == 0
1266 && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1267 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1268 rprintf(FINFO, "%s exists\n", fname);
1269 #ifdef SUPPORT_HARD_LINKS
1270 if (F_IS_HLINKED(file))
1271 handle_skipped_hlink(file, itemizing, code, f_out);
1272 #endif
1273 goto cleanup;
1274 }
1275
1276 fnamecmp = fname;
1277
1278 if (is_dir) {
1279 mode_t added_perms;
1280 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1281 goto cleanup;
1282 if (am_root < 0) {
1283 /* For --fake-super, the dir must be useable by the copying
1284 * user, just like it would be for root. */
1285 added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1286 } else
1287 added_perms = 0;
1288 if (is_dir < 0) {
1289 /* In inc_recurse mode we want to make sure any missing
1290 * directories get created while we're still processing
1291 * the parent dir (which allows us to touch the parent
1292 * dir's mtime right away). We will handle the dir in
1293 * full later (right before we handle its contents). */
1294 if (statret == 0
1295 && (S_ISDIR(sx.st.st_mode)
1296 || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1297 goto cleanup; /* Any errors get reported later. */
1298 if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1299 file->flags |= FLAG_DIR_CREATED;
1300 goto cleanup;
1301 }
1302 /* The file to be received is a directory, so we need
1303 * to prepare appropriately. If there is already a
1304 * file of that name and it is *not* a directory, then
1305 * we need to delete it. If it doesn't exist, then
1306 * (perhaps recursively) create it. */
1307 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1308 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1309 goto skipping_dir_contents;
1310 statret = -1;
1311 }
1312 if (dry_run && statret != 0) {
1313 if (!dry_missing_dir)
1314 dry_missing_dir = file;
1315 file->flags |= FLAG_MISSING_DIR;
1316 }
1317 real_ret = statret;
1318 real_sx = sx;
1319 if (file->flags & FLAG_DIR_CREATED)
1320 statret = -1;
1321 if (!preserve_perms) { /* See comment in non-dir code below. */
1322 file->mode = dest_mode(file->mode, sx.st.st_mode,
1323 dflt_perms, statret == 0);
1324 }
1325 if (statret != 0 && basis_dir[0] != NULL) {
1326 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1327 itemizing, code);
1328 if (j == -2) {
1329 itemizing = 0;
1330 code = FNONE;
1331 statret = 1;
1332 } else if (j >= 0) {
1333 statret = 1;
1334 fnamecmp = fnamecmpbuf;
1335 }
1336 }
1337 if (itemizing && f_out != -1) {
1338 itemize(fnamecmp, file, ndx, statret, &sx,
1339 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1340 }
1341 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1342 if (!relative_paths || errno != ENOENT
1343 || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1344 || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1345 rsyserr(FERROR_XFER, errno,
1346 "recv_generator: mkdir %s failed",
1347 full_fname(fname));
1348 skipping_dir_contents:
1349 rprintf(FERROR,
1350 "*** Skipping any contents from this failed directory ***\n");
1351 skip_dir = file;
1352 file->flags |= FLAG_MISSING_DIR;
1353 goto cleanup;
1354 }
1355 }
1356
1357 #ifdef SUPPORT_XATTRS
1358 if (preserve_xattrs && statret == 1)
1359 copy_xattrs(fnamecmpbuf, fname);
1360 #endif
1361 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1362 && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1363 rprintf(code, "%s/\n", fname);
1364
1365 /* We need to ensure that the dirs in the transfer have writable
1366 * permissions during the time we are putting files within them.
1367 * This is then fixed after the transfer is done. */
1368 #ifdef HAVE_CHMOD
1369 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1370 mode_t mode = file->mode | S_IWUSR;
1371 if (do_chmod(fname, mode) < 0) {
1372 rsyserr(FERROR_XFER, errno,
1373 "failed to modify permissions on %s",
1374 full_fname(fname));
1375 }
1376 need_retouch_dir_perms = 1;
1377 }
1378 #endif
1379
1380 if (real_ret != 0 && one_file_system)
1381 real_sx.st.st_dev = filesystem_dev;
1382 if (inc_recurse) {
1383 if (one_file_system) {
1384 uint32 *devp = F_DIR_DEV_P(file);
1385 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1386 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1387 }
1388 }
1389 else if (delete_during && f_out != -1 && !phase
1390 && !(file->flags & FLAG_MISSING_DIR)) {
1391 if (file->flags & FLAG_CONTENT_DIR)
1392 delete_in_dir(fname, file, &real_sx.st.st_dev);
1393 else
1394 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1395 }
1396 goto cleanup;
1397 }
1398
1399 /* If we're not preserving permissions, change the file-list's
1400 * mode based on the local permissions and some heuristics. */
1401 if (!preserve_perms) {
1402 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1403 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1404 exists);
1405 }
1406
1407 #ifdef SUPPORT_HARD_LINKS
1408 if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1409 && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1410 goto cleanup;
1411 #endif
1412
1413 if (preserve_links && S_ISLNK(file->mode)) {
1414 #ifdef SUPPORT_LINKS
1415 const char *sl = F_SYMLINK(file);
1416 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1417 if (INFO_GTE(NAME, 1)) {
1418 if (solo_file) {
1419 /* fname contains the destination path, but we
1420 * want to report the source path. */
1421 fname = f_name(file, NULL);
1422 }
1423 rprintf(FINFO,
1424 "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1425 fname, sl);
1426 }
1427 return;
1428 }
1429 if (statret == 0) {
1430 char lnk[MAXPATHLEN];
1431 int len;
1432
1433 if (S_ISLNK(sx.st.st_mode)
1434 && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1435 && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1436 /* The link is pointing to the right place. */
1437 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1438 if (itemizing)
1439 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1440 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1441 if (preserve_hard_links && F_IS_HLINKED(file))
1442 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1443 #endif
1444 if (remove_source_files == 1)
1445 goto return_with_success;
1446 goto cleanup;
1447 }
1448 } else if (basis_dir[0] != NULL) {
1449 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1450 itemizing, code);
1451 if (j == -2) {
1452 #ifndef CAN_HARDLINK_SYMLINK
1453 if (link_dest) {
1454 /* Resort to --copy-dest behavior. */
1455 } else
1456 #endif
1457 if (!copy_dest)
1458 goto cleanup;
1459 itemizing = 0;
1460 code = FNONE;
1461 } else if (j >= 0)
1462 statret = 1;
1463 }
1464 if (atomic_create(file, fname, sl, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1465 set_file_attrs(fname, file, NULL, NULL, 0);
1466 if (itemizing) {
1467 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1468 statret = -1;
1469 itemize(fname, file, ndx, statret, &sx,
1470 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1471 }
1472 if (code != FNONE && INFO_GTE(NAME, 1))
1473 rprintf(code, "%s -> %s\n", fname, sl);
1474 #ifdef SUPPORT_HARD_LINKS
1475 if (preserve_hard_links && F_IS_HLINKED(file))
1476 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1477 #endif
1478 /* This does not check remove_source_files == 1
1479 * because this is one of the items that the old
1480 * --remove-sent-files option would remove. */
1481 if (remove_source_files)
1482 goto return_with_success;
1483 }
1484 #endif
1485 goto cleanup;
1486 }
1487
1488 if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1489 || (preserve_specials && IS_SPECIAL(file->mode))) {
1490 dev_t rdev;
1491 int del_for_flag = 0;
1492 if (IS_DEVICE(file->mode)) {
1493 uint32 *devp = F_RDEV_P(file);
1494 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1495 } else
1496 rdev = 0;
1497 if (statret == 0) {
1498 if (IS_DEVICE(file->mode)) {
1499 if (!IS_DEVICE(sx.st.st_mode))
1500 statret = -1;
1501 del_for_flag = DEL_FOR_DEVICE;
1502 } else {
1503 if (!IS_SPECIAL(sx.st.st_mode))
1504 statret = -1;
1505 del_for_flag = DEL_FOR_SPECIAL;
1506 }
1507 if (statret == 0
1508 && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1509 && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1510 /* The device or special file is identical. */
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_SPECIAL
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 }
1538 if (DEBUG_GTE(GENR, 1)) {
1539 rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1540 fname, (int)file->mode,
1541 (long)major(rdev), (long)minor(rdev));
1542 }
1543 if (atomic_create(file, fname, NULL, rdev, &sx, del_for_flag)) {
1544 set_file_attrs(fname, file, NULL, NULL, 0);
1545 if (itemizing) {
1546 itemize(fname, file, ndx, statret, &sx,
1547 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1548 }
1549 if (code != FNONE && INFO_GTE(NAME, 1))
1550 rprintf(code, "%s\n", fname);
1551 #ifdef SUPPORT_HARD_LINKS
1552 if (preserve_hard_links && F_IS_HLINKED(file))
1553 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1554 #endif
1555 if (remove_source_files == 1)
1556 goto return_with_success;
1557 }
1558 goto cleanup;
1559 }
1560
1561 if (!S_ISREG(file->mode)) {
1562 if (solo_file)
1563 fname = f_name(file, NULL);
1564 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1565 goto cleanup;
1566 }
1567
1568 if (max_size > 0 && F_LENGTH(file) > max_size) {
1569 if (INFO_GTE(SKIP, 1)) {
1570 if (solo_file)
1571 fname = f_name(file, NULL);
1572 rprintf(FINFO, "%s is over max-size\n", fname);
1573 }
1574 goto cleanup;
1575 }
1576 if (min_size > 0 && F_LENGTH(file) < min_size) {
1577 if (INFO_GTE(SKIP, 1)) {
1578 if (solo_file)
1579 fname = f_name(file, NULL);
1580 rprintf(FINFO, "%s is under min-size\n", fname);
1581 }
1582 goto cleanup;
1583 }
1584
1585 if (update_only > 0 && statret == 0
1586 && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1587 if (INFO_GTE(SKIP, 1))
1588 rprintf(FINFO, "%s is newer\n", fname);
1589 #ifdef SUPPORT_HARD_LINKS
1590 if (F_IS_HLINKED(file))
1591 handle_skipped_hlink(file, itemizing, code, f_out);
1592 #endif
1593 goto cleanup;
1594 }
1595
1596 fnamecmp_type = FNAMECMP_FNAME;
1597
1598 if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1599 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1600 goto cleanup;
1601 statret = -1;
1602 stat_errno = ENOENT;
1603 }
1604
1605 if (statret != 0 && basis_dir[0] != NULL) {
1606 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1607 itemizing, code);
1608 if (j == -2) {
1609 if (remove_source_files == 1)
1610 goto return_with_success;
1611 goto cleanup;
1612 }
1613 if (j >= 0) {
1614 fnamecmp = fnamecmpbuf;
1615 fnamecmp_type = j;
1616 statret = 0;
1617 }
1618 }
1619
1620 real_ret = statret;
1621 real_sx = sx;
1622
1623 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1624 && link_stat(partialptr, &partial_st, 0) == 0
1625 && S_ISREG(partial_st.st_mode)) {
1626 if (statret != 0)
1627 goto prepare_to_open;
1628 } else
1629 partialptr = NULL;
1630
1631 if (statret != 0 && fuzzy_dirlist) {
1632 int j = find_fuzzy(file, fuzzy_dirlist);
1633 if (j >= 0) {
1634 fuzzy_file = fuzzy_dirlist->files[j];
1635 f_name(fuzzy_file, fnamecmpbuf);
1636 if (DEBUG_GTE(FUZZY, 1)) {
1637 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1638 fname, fnamecmpbuf);
1639 }
1640 sx.st.st_size = F_LENGTH(fuzzy_file);
1641 statret = 0;
1642 fnamecmp = fnamecmpbuf;
1643 fnamecmp_type = FNAMECMP_FUZZY;
1644 }
1645 }
1646
1647 if (statret != 0) {
1648 #ifdef SUPPORT_HARD_LINKS
1649 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1650 cur_flist->in_progress++;
1651 goto cleanup;
1652 }
1653 #endif
1654 if (stat_errno == ENOENT)
1655 goto notify_others;
1656 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1657 full_fname(fname));
1658 goto cleanup;
1659 }
1660
1661 if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1662 ;
1663 else if (fnamecmp_type == FNAMECMP_FUZZY)
1664 ;
1665 else if (unchanged_file(fnamecmp, file, &sx.st)) {
1666 if (partialptr) {
1667 do_unlink(partialptr);
1668 handle_partial_dir(partialptr, PDIR_DELETE);
1669 }
1670 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1671 if (itemizing)
1672 itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1673 #ifdef SUPPORT_HARD_LINKS
1674 if (preserve_hard_links && F_IS_HLINKED(file))
1675 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1676 #endif
1677 if (remove_source_files != 1)
1678 goto cleanup;
1679 return_with_success:
1680 if (!dry_run)
1681 send_msg_int(MSG_SUCCESS, ndx);
1682 goto cleanup;
1683 }
1684
1685 if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1686 #ifdef SUPPORT_HARD_LINKS
1687 if (F_IS_HLINKED(file))
1688 handle_skipped_hlink(file, itemizing, code, f_out);
1689 #endif
1690 goto cleanup;
1691 }
1692
1693 prepare_to_open:
1694 if (partialptr) {
1695 sx.st = partial_st;
1696 fnamecmp = partialptr;
1697 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1698 statret = 0;
1699 }
1700
1701 if (!do_xfers)
1702 goto notify_others;
1703
1704 if (read_batch || whole_file) {
1705 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1706 if (!(backupptr = get_backup_name(fname)))
1707 goto cleanup;
1708 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1709 goto pretend_missing;
1710 if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1711 unmake_file(back_file);
1712 back_file = NULL;
1713 goto cleanup;
1714 }
1715 }
1716 goto notify_others;
1717 }
1718
1719 if (fuzzy_dirlist) {
1720 int j = flist_find(fuzzy_dirlist, file);
1721 if (j >= 0) /* don't use changing file as future fuzzy basis */
1722 fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1723 }
1724
1725 /* open the file */
1726 if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1727 rsyserr(FERROR, errno, "failed to open %s, continuing",
1728 full_fname(fnamecmp));
1729 pretend_missing:
1730 /* pretend the file didn't exist */
1731 #ifdef SUPPORT_HARD_LINKS
1732 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1733 cur_flist->in_progress++;
1734 goto cleanup;
1735 }
1736 #endif
1737 statret = real_ret = -1;
1738 goto notify_others;
1739 }
1740
1741 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1742 if (!(backupptr = get_backup_name(fname))) {
1743 close(fd);
1744 goto cleanup;
1745 }
1746 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1747 close(fd);
1748 goto pretend_missing;
1749 }
1750 if (robust_unlink(backupptr) && errno != ENOENT) {
1751 rsyserr(FERROR_XFER, errno, "unlink %s",
1752 full_fname(backupptr));
1753 unmake_file(back_file);
1754 back_file = NULL;
1755 close(fd);
1756 goto cleanup;
1757 }
1758 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1759 rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1760 unmake_file(back_file);
1761 back_file = NULL;
1762 close(fd);
1763 goto cleanup;
1764 }
1765 fnamecmp_type = FNAMECMP_BACKUP;
1766 }
1767
1768 if (DEBUG_GTE(DELTASUM, 3)) {
1769 rprintf(FINFO, "gen mapped %s of size %s\n",
1770 fnamecmp, big_num(sx.st.st_size));
1771 }
1772
1773 if (DEBUG_GTE(DELTASUM, 2))
1774 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1775
1776 notify_others:
1777 if (remove_source_files && !delay_updates && !phase && !dry_run)
1778 increment_active_files(ndx, itemizing, code);
1779 if (inc_recurse && !dry_run)
1780 cur_flist->in_progress++;
1781 #ifdef SUPPORT_HARD_LINKS
1782 if (preserve_hard_links && F_IS_HLINKED(file))
1783 file->flags |= FLAG_FILE_SENT;
1784 #endif
1785 write_ndx(f_out, ndx);
1786 if (itemizing) {
1787 int iflags = ITEM_TRANSFER;
1788 if (always_checksum > 0)
1789 iflags |= ITEM_REPORT_CHANGE;
1790 if (fnamecmp_type != FNAMECMP_FNAME)
1791 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1792 if (fnamecmp_type == FNAMECMP_FUZZY)
1793 iflags |= ITEM_XNAME_FOLLOWS;
1794 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1795 fuzzy_file ? fuzzy_file->basename : NULL);
1796 #ifdef SUPPORT_ACLS
1797 if (preserve_acls)
1798 free_acl(&real_sx);
1799 #endif
1800 #ifdef SUPPORT_XATTRS
1801 if (preserve_xattrs)
1802 free_xattr(&real_sx);
1803 #endif
1804 }
1805
1806 if (!do_xfers) {
1807 #ifdef SUPPORT_HARD_LINKS
1808 if (preserve_hard_links && F_IS_HLINKED(file))
1809 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1810 #endif
1811 goto cleanup;
1812 }
1813 if (read_batch)
1814 goto cleanup;
1815
1816 if (statret != 0 || whole_file)
1817 write_sum_head(f_out, NULL);
1818 else if (sx.st.st_size <= 0) {
1819 write_sum_head(f_out, NULL);
1820 close(fd);
1821 } else {
1822 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1823 rprintf(FWARNING,
1824 "WARNING: file is too large for checksum sending: %s\n",
1825 fnamecmp);
1826 write_sum_head(f_out, NULL);
1827 }
1828 close(fd);
1829 }
1830
1831 cleanup:
1832 if (back_file) {
1833 int save_preserve_xattrs = preserve_xattrs;
1834 if (f_copy >= 0)
1835 close(f_copy);
1836 #ifdef SUPPORT_XATTRS
1837 if (preserve_xattrs) {
1838 copy_xattrs(fname, backupptr);
1839 preserve_xattrs = 0;
1840 }
1841 #endif
1842 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1843 preserve_xattrs = save_preserve_xattrs;
1844 if (INFO_GTE(BACKUP, 1)) {
1845 rprintf(FINFO, "backed up %s to %s\n",
1846 fname, backupptr);
1847 }
1848 unmake_file(back_file);
1849 }
1850
1851 #ifdef SUPPORT_ACLS
1852 if (preserve_acls)
1853 free_acl(&sx);
1854 #endif
1855 #ifdef SUPPORT_XATTRS
1856 if (preserve_xattrs)
1857 free_xattr(&sx);
1858 #endif
1859 return;
1860 }
1861
1862 /* If we are replacing an existing hard link, symlink, device, or special file,
1863 * create a temp-name item and rename it into place. Only a symlink or hard
1864 * link puts a non-NULL value into the lnk arg. Only a device puts a non-0
1865 * value into the rdev arg. Specify 0 for the del_for_flag if there is not a
1866 * file to replace. This returns 1 on success and 0 on failure. */
1867 int atomic_create(struct file_struct *file, char *fname, const char *lnk,
1868 dev_t rdev, stat_x *sxp, int del_for_flag)
1869 {
1870 char tmpname[MAXPATHLEN];
1871 const char *create_name;
1872 int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1873
1874 if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1875 skip_atomic = 1;
1876 else
1877 skip_atomic = 0;
1878
1879 if (del_for_flag) {
1880 if (make_backups > 0 && !dir_in_the_way) {
1881 if (!make_backup(fname, skip_atomic))
1882 return 0;
1883 } else if (skip_atomic) {
1884 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1885 if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1886 return 0;
1887 }
1888 }
1889
1890 create_name = skip_atomic ? fname : tmpname;
1891
1892 if (lnk) {
1893 #ifdef SUPPORT_LINKS
1894 if (S_ISLNK(file->mode)
1895 #ifdef SUPPORT_HARD_LINKS /* The first symlink in a hard-linked cluster is always created. */
1896 && (!F_IS_HLINKED(file) || file->flags & FLAG_HLINK_FIRST)
1897 #endif
1898 ) {
1899 if (do_symlink(lnk, create_name) < 0) {
1900 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1901 full_fname(create_name), lnk);
1902 return 0;
1903 }
1904 } else
1905 #endif
1906 #ifdef SUPPORT_HARD_LINKS
1907 if (!hard_link_one(file, create_name, lnk, 0))
1908 return 0;
1909 #endif
1910 } else {
1911 if (do_mknod(create_name, file->mode, rdev) < 0) {
1912 rsyserr(FERROR_XFER, errno, "mknod %s failed",
1913 full_fname(create_name));
1914 return 0;
1915 }
1916 }
1917
1918 if (!skip_atomic) {
1919 if (do_rename(tmpname, fname) < 0) {
1920 rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
1921 full_fname(tmpname), full_fname(fname));
1922 do_unlink(tmpname);
1923 return 0;
1924 }
1925 }
1926
1927 return 1;
1928 }
1929
1930 #ifdef SUPPORT_HARD_LINKS
1931 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1932 enum logcode code, int f_out)
1933 {
1934 char fbuf[MAXPATHLEN];
1935 int new_last_ndx;
1936 struct file_list *save_flist = cur_flist;
1937
1938 /* If we skip the last item in a chain of links and there was a
1939 * prior non-skipped hard-link waiting to finish, finish it now. */
1940 if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1941 return;
1942
1943 file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1944 cur_flist->in_progress--; /* undo prior increment */
1945 f_name(file, fbuf);
1946 recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1947
1948 cur_flist = save_flist;
1949 }
1950 #endif
1951
1952 static void touch_up_dirs(struct file_list *flist, int ndx)
1953 {
1954 static int counter = 0;
1955 struct file_struct *file;
1956 char *fname;
1957 BOOL fix_dir_perms;
1958 int i, start, end;
1959
1960 if (ndx < 0) {
1961 start = 0;
1962 end = flist->used - 1;
1963 } else
1964 start = end = ndx;
1965
1966 /* Fix any directory permissions that were modified during the
1967 * transfer and/or re-set any tweaked modified-time values. */
1968 for (i = start; i <= end; i++, counter++) {
1969 file = flist->files[i];
1970 if (!S_ISDIR(file->mode)
1971 || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1972 continue;
1973 if (DEBUG_GTE(TIME, 2)) {
1974 fname = f_name(file, NULL);
1975 rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
1976 NS(fname), i);
1977 }
1978 /* Be sure not to retouch permissions with --fake-super. */
1979 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
1980 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
1981 || !(need_retouch_dir_times || fix_dir_perms))
1982 continue;
1983 fname = f_name(file, NULL);
1984 if (fix_dir_perms)
1985 do_chmod(fname, file->mode);
1986 if (need_retouch_dir_times) {
1987 STRUCT_STAT st;
1988 if (link_stat(fname, &st, 0) == 0
1989 && cmp_time(st.st_mtime, file->modtime) != 0)
1990 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
1991 }
1992 if (counter >= loopchk_limit) {
1993 if (allowed_lull)
1994 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
1995 else
1996 maybe_flush_socket(0);
1997 counter = 0;
1998 }
1999 }
2000 }
2001
2002 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2003 {
2004 struct file_struct *file;
2005 struct file_list *flist;
2006 char fbuf[MAXPATHLEN];
2007 int ndx;
2008
2009 while (1) {
2010 #ifdef SUPPORT_HARD_LINKS
2011 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2012 int send_failed = (ndx == -2);
2013 if (send_failed)
2014 ndx = get_hlink_num();
2015 flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2016 file = flist->files[ndx - flist->ndx_start];
2017 assert(file->flags & FLAG_HLINKED);
2018 if (send_failed)
2019 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2020 else
2021 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2022 flist->in_progress--;
2023 continue;
2024 }
2025 #endif
2026
2027 if (check_redo && (ndx = get_redo_num()) != -1) {
2028 csum_length = SUM_LENGTH;
2029 max_size = -max_size;
2030 min_size = -min_size;
2031 ignore_existing = -ignore_existing;
2032 ignore_non_existing = -ignore_non_existing;
2033 update_only = -update_only;
2034 always_checksum = -always_checksum;
2035 size_only = -size_only;
2036 append_mode = -append_mode;
2037 make_backups = -make_backups; /* avoid dup backup w/inplace */
2038 ignore_times++;
2039
2040 flist = cur_flist;
2041 cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2042
2043 file = cur_flist->files[ndx - cur_flist->ndx_start];
2044 if (solo_file)
2045 strlcpy(fbuf, solo_file, sizeof fbuf);
2046 else
2047 f_name(file, fbuf);
2048 recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2049 cur_flist->to_redo--;
2050
2051 cur_flist = flist;
2052
2053 csum_length = SHORT_SUM_LENGTH;
2054 max_size = -max_size;
2055 min_size = -min_size;
2056 ignore_existing = -ignore_existing;
2057 ignore_non_existing = -ignore_non_existing;
2058 update_only = -update_only;
2059 always_checksum = -always_checksum;
2060 size_only = -size_only;
2061 append_mode = -append_mode;
2062 make_backups = -make_backups;
2063 ignore_times--;
2064 continue;
2065 }
2066
2067 if (cur_flist == first_flist)
2068 break;
2069
2070 /* We only get here if inc_recurse is enabled. */
2071 if (first_flist->in_progress || first_flist->to_redo)
2072 break;
2073
2074 write_ndx(sock_f_out, NDX_DONE);
2075 if (!read_batch && !flist_eof) {
2076 int old_total = 0;
2077 for (flist = first_flist; flist != cur_flist; flist = flist->next)
2078 old_total += flist->used;
2079 maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2080 }
2081
2082 if (delete_during == 2 || !dir_tweaking) {
2083 /* Skip directory touch-up. */
2084 } else if (first_flist->parent_ndx >= 0)
2085 touch_up_dirs(dir_flist, first_flist->parent_ndx);
2086
2087 flist_free(first_flist); /* updates first_flist */
2088 }
2089 }
2090
2091 void generate_files(int f_out, const char *local_name)
2092 {
2093 int i, ndx, next_loopchk = 0;
2094 char fbuf[MAXPATHLEN];
2095 int itemizing;
2096 enum logcode code;
2097 int save_info_flist = info_levels[INFO_FLIST];
2098 int save_info_progress = info_levels[INFO_PROGRESS];
2099
2100 if (protocol_version >= 29) {
2101 itemizing = 1;
2102 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2103 code = logfile_format_has_i ? FNONE : FLOG;
2104 } else if (am_daemon) {
2105 itemizing = logfile_format_has_i && do_xfers;
2106 maybe_ATTRS_REPORT = ATTRS_REPORT;
2107 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2108 } else if (!am_server) {
2109 itemizing = stdout_format_has_i;
2110 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2111 code = itemizing ? FNONE : FINFO;
2112 } else {
2113 itemizing = 0;
2114 maybe_ATTRS_REPORT = ATTRS_REPORT;
2115 code = FINFO;
2116 }
2117 solo_file = local_name;
2118 dir_tweaking = !(list_only || solo_file || dry_run);
2119 need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2120 loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2121 symlink_timeset_failed_flags = ITEM_REPORT_TIME
2122 | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2123 implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2124
2125 if (DEBUG_GTE(GENR, 1))
2126 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2127
2128 if (delete_before && !solo_file && cur_flist->used > 0)
2129 do_delete_pass();
2130 if (delete_during == 2) {
2131 deldelay_size = BIGPATHBUFLEN * 4;
2132 deldelay_buf = new_array(char, deldelay_size);
2133 if (!deldelay_buf)
2134 out_of_memory("delete-delay");
2135 }
2136 info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2137
2138 if (append_mode > 0 || whole_file < 0)
2139 whole_file = 0;
2140 if (DEBUG_GTE(FLIST, 1)) {
2141 rprintf(FINFO, "delta-transmission %s\n",
2142 whole_file
2143 ? "disabled for local transfer or --whole-file"
2144 : "enabled");
2145 }
2146
2147 dflt_perms = (ACCESSPERMS & ~orig_umask);
2148
2149 do {
2150 #ifdef SUPPORT_HARD_LINKS
2151 if (preserve_hard_links && inc_recurse) {
2152 while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2153 wait_for_receiver();
2154 }
2155 #endif
2156
2157 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2158 struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2159 if (solo_file)
2160 strlcpy(fbuf, solo_file, sizeof fbuf);
2161 else
2162 f_name(fp, fbuf);
2163 ndx = cur_flist->ndx_start - 1;
2164 recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2165 if (delete_during && dry_run < 2 && !list_only
2166 && !(fp->flags & FLAG_MISSING_DIR)) {
2167 if (fp->flags & FLAG_CONTENT_DIR) {
2168 dev_t dirdev;
2169 if (one_file_system) {
2170 uint32 *devp = F_DIR_DEV_P(fp);
2171 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2172 } else
2173 dirdev = MAKEDEV(0, 0);
2174 delete_in_dir(fbuf, fp, &dirdev);
2175 } else
2176 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2177 }
2178 }
2179 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2180 struct file_struct *file = cur_flist->sorted[i];
2181
2182 if (!F_IS_ACTIVE(file))
2183 continue;
2184
2185 if (unsort_ndx)
2186 ndx = F_NDX(file);
2187 else
2188 ndx = i + cur_flist->ndx_start;
2189
2190 if (solo_file)
2191 strlcpy(fbuf, solo_file, sizeof fbuf);
2192 else
2193 f_name(file, fbuf);
2194 recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2195
2196 check_for_finished_files(itemizing, code, 0);
2197
2198 if (i + cur_flist->ndx_start >= next_loopchk) {
2199 if (allowed_lull)
2200 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2201 else
2202 maybe_flush_socket(0);
2203 next_loopchk += loopchk_limit;
2204 }
2205 }
2206
2207 if (!inc_recurse) {
2208 write_ndx(f_out, NDX_DONE);
2209 break;
2210 }
2211
2212 while (1) {
2213 check_for_finished_files(itemizing, code, 1);
2214 if (cur_flist->next || flist_eof)
2215 break;
2216 wait_for_receiver();
2217 }
2218 } while ((cur_flist = cur_flist->next) != NULL);
2219
2220 if (delete_during)
2221 delete_in_dir(NULL, NULL, &dev_zero);
2222 phase++;
2223 if (DEBUG_GTE(GENR, 1))
2224 rprintf(FINFO, "generate_files phase=%d\n", phase);
2225
2226 while (1) {
2227 check_for_finished_files(itemizing, code, 1);
2228 if (msgdone_cnt)
2229 break;
2230 wait_for_receiver();
2231 }
2232
2233 phase++;
2234 if (DEBUG_GTE(GENR, 1))
2235 rprintf(FINFO, "generate_files phase=%d\n", phase);
2236
2237 write_ndx(f_out, NDX_DONE);
2238
2239 /* Reduce round-trip lag-time for a useless delay-updates phase. */
2240 if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2241 write_ndx(f_out, NDX_DONE);
2242
2243 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2244 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2245 write_del_stats(f_out);
2246 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2247 write_ndx(f_out, NDX_DONE);
2248 }
2249
2250 /* Read MSG_DONE for the redo phase (and any prior messages). */
2251 while (1) {
2252 check_for_finished_files(itemizing, code, 0);
2253 if (msgdone_cnt > 1)
2254 break;
2255 wait_for_receiver();
2256 }
2257
2258 if (protocol_version >= 29) {
2259 phase++;
2260 if (DEBUG_GTE(GENR, 1))
2261 rprintf(FINFO, "generate_files phase=%d\n", phase);
2262 if (!EARLY_DELAY_DONE_MSG()) {
2263 write_ndx(f_out, NDX_DONE);
2264 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2265 write_ndx(f_out, NDX_DONE);
2266 }
2267 /* Read MSG_DONE for delay-updates phase & prior messages. */
2268 while (msgdone_cnt == 2)
2269 wait_for_receiver();
2270 }
2271
2272 info_levels[INFO_FLIST] = save_info_flist;
2273 info_levels[INFO_PROGRESS] = save_info_progress;
2274
2275 if (delete_during == 2)
2276 do_delayed_deletions(fbuf);
2277 if (delete_after && !solo_file && file_total > 0)
2278 do_delete_pass();
2279
2280 if (max_delete >= 0 && skipped_deletes) {
2281 rprintf(FWARNING,
2282 "Deletions stopped due to --max-delete limit (%d skipped)\n",
2283 skipped_deletes);
2284 io_error |= IOERR_DEL_LIMIT;
2285 }
2286
2287 if (protocol_version >= 31) {
2288 if (!EARLY_DELETE_DONE_MSG()) {
2289 if (INFO_GTE(STATS, 2) || read_batch)
2290 write_del_stats(f_out);
2291 write_ndx(f_out, NDX_DONE);
2292 }
2293
2294 /* Read MSG_DONE for late-delete phase & prior messages. */
2295 while (msgdone_cnt == 3)
2296 wait_for_receiver();
2297 }
2298
2299 if ((need_retouch_dir_perms || need_retouch_dir_times)
2300 && dir_tweaking && (!inc_recurse || delete_during == 2))
2301 touch_up_dirs(dir_flist, -1);
2302
2303 if (DEBUG_GTE(GENR, 1))
2304 rprintf(FINFO, "generate_files finished\n");
2305 }