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Preparing for release of 3.1.1pre1
[rsync.git] / generator.c
blob4dcc73a4198305e632a43fe69a1b57febbd3cd75
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 inplace;
61 extern int append_mode;
62 extern int make_backups;
63 extern int csum_length;
64 extern int ignore_times;
65 extern int size_only;
66 extern OFF_T max_size;
67 extern OFF_T min_size;
68 extern int io_error;
69 extern int flist_eof;
70 extern int allowed_lull;
71 extern int sock_f_out;
72 extern int protocol_version;
73 extern int file_total;
74 extern int fuzzy_basis;
75 extern int always_checksum;
76 extern int checksum_len;
77 extern char *partial_dir;
78 extern int compare_dest;
79 extern int copy_dest;
80 extern int link_dest;
81 extern int whole_file;
82 extern int list_only;
83 extern int read_batch;
84 extern int write_batch;
85 extern int safe_symlinks;
86 extern long block_size; /* "long" because popt can't set an int32. */
87 extern int unsort_ndx;
88 extern int max_delete;
89 extern int force_delete;
90 extern int one_file_system;
91 extern int skipped_deletes;
92 extern dev_t filesystem_dev;
93 extern mode_t orig_umask;
94 extern uid_t our_uid;
95 extern char *tmpdir;
96 extern char *basis_dir[MAX_BASIS_DIRS+1];
97 extern struct file_list *cur_flist, *first_flist, *dir_flist;
98 extern filter_rule_list filter_list, daemon_filter_list;
99
100 int maybe_ATTRS_REPORT = 0;
101
102 static dev_t dev_zero;
103 static int deldelay_size = 0, deldelay_cnt = 0;
104 static char *deldelay_buf = NULL;
105 static int deldelay_fd = -1;
106 static int loopchk_limit;
107 static int dir_tweaking;
108 static int symlink_timeset_failed_flags;
109 static int need_retouch_dir_times;
110 static int need_retouch_dir_perms;
111 static const char *solo_file = NULL;
112
113 enum nonregtype {
114 TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
115 };
116
117 /* Forward declarations. */
118 #ifdef SUPPORT_HARD_LINKS
119 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
120 enum logcode code, int f_out);
121 #endif
122
123 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
124 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
125
126 static int start_delete_delay_temp(void)
127 {
128 char fnametmp[MAXPATHLEN];
129 int save_dry_run = dry_run;
130
131 dry_run = 0;
132 if (!get_tmpname(fnametmp, "deldelay", False)
133 || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
134 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
135 inc_recurse ? "" : " -- switching to --delete-after");
136 delete_during = 0;
137 delete_after = !inc_recurse;
138 dry_run = save_dry_run;
139 return 0;
140 }
141 unlink(fnametmp);
142 dry_run = save_dry_run;
143 return 1;
144 }
145
146 static int flush_delete_delay(void)
147 {
148 if (deldelay_fd < 0 && !start_delete_delay_temp())
149 return 0;
150 if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
151 rsyserr(FERROR, errno, "flush of delete-delay buffer");
152 delete_during = 0;
153 delete_after = !inc_recurse;
154 close(deldelay_fd);
155 return 0;
156 }
157 deldelay_cnt = 0;
158 return 1;
159 }
160
161 static int remember_delete(struct file_struct *file, const char *fname, int flags)
162 {
163 int len;
164
165 if (deldelay_cnt == deldelay_size && !flush_delete_delay())
166 return 0;
167
168 if (flags & DEL_NO_UID_WRITE)
169 deldelay_buf[deldelay_cnt++] = '!';
170
171 while (1) {
172 len = snprintf(deldelay_buf + deldelay_cnt,
173 deldelay_size - deldelay_cnt,
174 "%x %s%c",
175 (int)file->mode, fname, '\0');
176 if ((deldelay_cnt += len) <= deldelay_size)
177 break;
178 deldelay_cnt -= len;
179 if (!flush_delete_delay())
180 return 0;
181 }
182
183 return 1;
184 }
185
186 static int read_delay_line(char *buf, int *flags_p)
187 {
188 static int read_pos = 0;
189 int j, len, mode;
190 char *bp, *past_space;
191
192 while (1) {
193 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
194 if (j < deldelay_cnt)
195 break;
196 if (deldelay_fd < 0) {
197 if (j > read_pos)
198 goto invalid_data;
199 return -1;
200 }
201 deldelay_cnt -= read_pos;
202 if (deldelay_cnt == deldelay_size)
203 goto invalid_data;
204 if (deldelay_cnt && read_pos) {
205 memmove(deldelay_buf, deldelay_buf + read_pos,
206 deldelay_cnt);
207 }
208 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
209 deldelay_size - deldelay_cnt);
210 if (len == 0) {
211 if (deldelay_cnt) {
212 rprintf(FERROR,
213 "ERROR: unexpected EOF in delete-delay file.\n");
214 }
215 return -1;
216 }
217 if (len < 0) {
218 rsyserr(FERROR, errno,
219 "reading delete-delay file");
220 return -1;
221 }
222 deldelay_cnt += len;
223 read_pos = 0;
224 }
225
226 bp = deldelay_buf + read_pos;
227 if (*bp == '!') {
228 bp++;
229 *flags_p = DEL_NO_UID_WRITE;
230 } else
231 *flags_p = 0;
232
233 if (sscanf(bp, "%x ", &mode) != 1) {
234 invalid_data:
235 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
236 return -1;
237 }
238 past_space = strchr(bp, ' ') + 1;
239 len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
240 read_pos = j + 1;
241
242 if (len > MAXPATHLEN) {
243 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
244 return -1;
245 }
246
247 /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
248 * instead of returning a pointer to our buffer. */
249 memcpy(buf, past_space, len);
250
251 return mode;
252 }
253
254 static void do_delayed_deletions(char *delbuf)
255 {
256 int mode, flags;
257
258 if (deldelay_fd >= 0) {
259 if (deldelay_cnt && !flush_delete_delay())
260 return;
261 lseek(deldelay_fd, 0, 0);
262 }
263 while ((mode = read_delay_line(delbuf, &flags)) >= 0)
264 delete_item(delbuf, mode, flags | DEL_RECURSE);
265 if (deldelay_fd >= 0)
266 close(deldelay_fd);
267 }
268
269 /* This function is used to implement per-directory deletion, and is used by
270 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
271 * MAXPATHLEN buffer with the name of the directory in it (the functions we
272 * call will append names onto the end, but the old dir value will be restored
273 * on exit). */
274 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
275 {
276 static int already_warned = 0;
277 struct file_list *dirlist;
278 char delbuf[MAXPATHLEN];
279 int dlen, i;
280
281 if (!fbuf) {
282 change_local_filter_dir(NULL, 0, 0);
283 return;
284 }
285
286 if (DEBUG_GTE(DEL, 2))
287 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
288
289 if (allowed_lull)
290 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
291
292 if (io_error & IOERR_GENERAL && !ignore_errors) {
293 if (already_warned)
294 return;
295 rprintf(FINFO,
296 "IO error encountered -- skipping file deletion\n");
297 already_warned = 1;
298 return;
299 }
300
301 dlen = strlen(fbuf);
302 change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
303
304 if (one_file_system) {
305 if (file->flags & FLAG_TOP_DIR)
306 filesystem_dev = *fs_dev;
307 else if (filesystem_dev != *fs_dev)
308 return;
309 }
310
311 dirlist = get_dirlist(fbuf, dlen, 0);
312
313 /* If an item in dirlist is not found in flist, delete it
314 * from the filesystem. */
315 for (i = dirlist->used; i--; ) {
316 struct file_struct *fp = dirlist->files[i];
317 if (!F_IS_ACTIVE(fp))
318 continue;
319 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
320 if (INFO_GTE(MOUNT, 1))
321 rprintf(FINFO, "cannot delete mount point: %s\n",
322 f_name(fp, NULL));
323 continue;
324 }
325 /* Here we want to match regardless of file type. Replacement
326 * of a file with one of another type is handled separately by
327 * a delete_item call with a DEL_MAKE_ROOM flag. */
328 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
329 int flags = DEL_RECURSE;
330 if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
331 flags |= DEL_NO_UID_WRITE;
332 f_name(fp, delbuf);
333 if (delete_during == 2) {
334 if (!remember_delete(fp, delbuf, flags))
335 break;
336 } else
337 delete_item(delbuf, fp->mode, flags);
338 }
339 }
340
341 flist_free(dirlist);
342 }
343
344 /* This deletes any files on the receiving side that are not present on the
345 * sending side. This is used by --delete-before and --delete-after. */
346 static void do_delete_pass(void)
347 {
348 char fbuf[MAXPATHLEN];
349 STRUCT_STAT st;
350 int j;
351
352 /* dry_run is incremented when the destination doesn't exist yet. */
353 if (dry_run > 1 || list_only)
354 return;
355
356 for (j = 0; j < cur_flist->used; j++) {
357 struct file_struct *file = cur_flist->sorted[j];
358
359 f_name(file, fbuf);
360
361 if (!(file->flags & FLAG_CONTENT_DIR)) {
362 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
363 continue;
364 }
365
366 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
367 rprintf(FINFO, "deleting in %s\n", fbuf);
368
369 if (link_stat(fbuf, &st, keep_dirlinks) < 0
370 || !S_ISDIR(st.st_mode))
371 continue;
372
373 delete_in_dir(fbuf, file, &st.st_dev);
374 }
375 delete_in_dir(NULL, NULL, &dev_zero);
376
377 if (INFO_GTE(FLIST, 2) && !am_server)
378 rprintf(FINFO, " \r");
379 }
380
381 static inline int time_differs(struct file_struct *file, stat_x *sxp)
382 {
383 return cmp_time(sxp->st.st_mtime, file->modtime);
384 }
385
386 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
387 {
388 if (preserve_perms)
389 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
390
391 if (preserve_executability)
392 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
393
394 return 0;
395 }
396
397 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
398 {
399 if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
400 return 1;
401
402 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
403 return 1;
404
405 return 0;
406 }
407
408 #ifdef SUPPORT_ACLS
409 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
410 {
411 if (preserve_acls) {
412 if (!ACL_READY(*sxp))
413 get_acl(fname, sxp);
414 if (set_acl(NULL, file, sxp, file->mode))
415 return 1;
416 }
417
418 return 0;
419 }
420 #endif
421
422 #ifdef SUPPORT_XATTRS
423 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
424 {
425 if (preserve_xattrs) {
426 if (!XATTR_READY(*sxp))
427 get_xattr(fname, sxp);
428 if (xattr_diff(file, sxp, 0))
429 return 1;
430 }
431
432 return 0;
433 }
434 #endif
435
436 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
437 {
438 if (S_ISLNK(file->mode)) {
439 #ifdef CAN_SET_SYMLINK_TIMES
440 if (preserve_times & PRESERVE_LINK_TIMES && time_differs(file, sxp))
441 return 0;
442 #endif
443 #ifdef CAN_CHMOD_SYMLINK
444 if (perms_differ(file, sxp))
445 return 0;
446 #endif
447 #ifdef CAN_CHOWN_SYMLINK
448 if (ownership_differs(file, sxp))
449 return 0;
450 #endif
451 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
452 if (acls_differ(fname, file, sxp))
453 return 0;
454 #endif
455 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
456 if (xattrs_differ(fname, file, sxp))
457 return 0;
458 #endif
459 } else {
460 if (preserve_times && time_differs(file, sxp))
461 return 0;
462 if (perms_differ(file, sxp))
463 return 0;
464 if (ownership_differs(file, sxp))
465 return 0;
466 #ifdef SUPPORT_ACLS
467 if (acls_differ(fname, file, sxp))
468 return 0;
469 #endif
470 #ifdef SUPPORT_XATTRS
471 if (xattrs_differ(fname, file, sxp))
472 return 0;
473 #endif
474 }
475
476 return 1;
477 }
478
479 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
480 stat_x *sxp, int32 iflags, uchar fnamecmp_type,
481 const char *xname)
482 {
483 if (statret >= 0) { /* A from-dest-dir statret can == 1! */
484 int keep_time = !preserve_times ? 0
485 : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
486 : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
487 : 1;
488
489 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
490 iflags |= ITEM_REPORT_SIZE;
491 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
492 if (iflags & ITEM_LOCAL_CHANGE)
493 iflags |= symlink_timeset_failed_flags;
494 } else if (keep_time
495 ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
496 : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
497 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
498 iflags |= ITEM_REPORT_TIME;
499 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
500 if (S_ISLNK(file->mode)) {
501 ;
502 } else
503 #endif
504 if (preserve_perms) {
505 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
506 iflags |= ITEM_REPORT_PERMS;
507 } else if (preserve_executability
508 && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
509 iflags |= ITEM_REPORT_PERMS;
510 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
511 iflags |= ITEM_REPORT_OWNER;
512 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
513 && sxp->st.st_gid != (gid_t)F_GROUP(file))
514 iflags |= ITEM_REPORT_GROUP;
515 #ifdef SUPPORT_ACLS
516 if (preserve_acls && !S_ISLNK(file->mode)) {
517 if (!ACL_READY(*sxp))
518 get_acl(fnamecmp, sxp);
519 if (set_acl(NULL, file, sxp, file->mode))
520 iflags |= ITEM_REPORT_ACL;
521 }
522 #endif
523 #ifdef SUPPORT_XATTRS
524 if (preserve_xattrs) {
525 if (!XATTR_READY(*sxp))
526 get_xattr(fnamecmp, sxp);
527 if (xattr_diff(file, sxp, 1))
528 iflags |= ITEM_REPORT_XATTR;
529 }
530 #endif
531 } else {
532 #ifdef SUPPORT_XATTRS
533 if (preserve_xattrs && xattr_diff(file, NULL, 1))
534 iflags |= ITEM_REPORT_XATTR;
535 #endif
536 iflags |= ITEM_IS_NEW;
537 }
538
539 iflags &= 0xffff;
540 if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
541 || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
542 if (protocol_version >= 29) {
543 if (ndx >= 0)
544 write_ndx(sock_f_out, ndx);
545 write_shortint(sock_f_out, iflags);
546 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
547 write_byte(sock_f_out, fnamecmp_type);
548 if (iflags & ITEM_XNAME_FOLLOWS)
549 write_vstring(sock_f_out, xname, strlen(xname));
550 #ifdef SUPPORT_XATTRS
551 if (preserve_xattrs && do_xfers
552 && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
553 int fd = iflags & ITEM_REPORT_XATTR ? sock_f_out : -1;
554 send_xattr_request(NULL, file, fd);
555 }
556 #endif
557 } else if (ndx >= 0) {
558 enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
559 log_item(code, file, iflags, xname);
560 }
561 }
562 }
563
564
565 /* Perform our quick-check heuristic for determining if a file is unchanged. */
566 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
567 {
568 if (st->st_size != F_LENGTH(file))
569 return 0;
570
571 /* if always checksum is set then we use the checksum instead
572 of the file time to determine whether to sync */
573 if (always_checksum > 0 && S_ISREG(st->st_mode)) {
574 char sum[MAX_DIGEST_LEN];
575 file_checksum(fn, sum, st->st_size);
576 return memcmp(sum, F_SUM(file), checksum_len) == 0;
577 }
578
579 if (size_only > 0)
580 return 1;
581
582 if (ignore_times)
583 return 0;
584
585 return cmp_time(st->st_mtime, file->modtime) == 0;
586 }
587
588
589 /*
590 * set (initialize) the size entries in the per-file sum_struct
591 * calculating dynamic block and checksum sizes.
592 *
593 * This is only called from generate_and_send_sums() but is a separate
594 * function to encapsulate the logic.
595 *
596 * The block size is a rounded square root of file length.
597 *
598 * The checksum size is determined according to:
599 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
600 * provided by Donovan Baarda which gives a probability of rsync
601 * algorithm corrupting data and falling back using the whole md4
602 * checksums.
603 *
604 * This might be made one of several selectable heuristics.
605 */
606 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
607 {
608 int32 blength;
609 int s2length;
610 int64 l;
611
612 if (len < 0) {
613 /* The file length overflowed our int64 var, so we can't process this file. */
614 sum->count = -1; /* indicate overflow error */
615 return;
616 }
617
618 if (block_size)
619 blength = block_size;
620 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
621 blength = BLOCK_SIZE;
622 else {
623 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
624 int32 c;
625 int cnt;
626 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
627 if (c < 0 || c >= max_blength)
628 blength = max_blength;
629 else {
630 blength = 0;
631 do {
632 blength |= c;
633 if (len < (int64)blength * blength)
634 blength &= ~c;
635 c >>= 1;
636 } while (c >= 8); /* round to multiple of 8 */
637 blength = MAX(blength, BLOCK_SIZE);
638 }
639 }
640
641 if (protocol_version < 27) {
642 s2length = csum_length;
643 } else if (csum_length == SUM_LENGTH) {
644 s2length = SUM_LENGTH;
645 } else {
646 int32 c;
647 int b = BLOCKSUM_BIAS;
648 for (l = len; l >>= 1; b += 2) {}
649 for (c = blength; (c >>= 1) && b; b--) {}
650 /* add a bit, subtract rollsum, round up. */
651 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
652 s2length = MAX(s2length, csum_length);
653 s2length = MIN(s2length, SUM_LENGTH);
654 }
655
656 sum->flength = len;
657 sum->blength = blength;
658 sum->s2length = s2length;
659 sum->remainder = (int32)(len % blength);
660 sum->count = (int32)(l = (len / blength) + (sum->remainder != 0));
661
662 if ((int64)sum->count != l)
663 sum->count = -1;
664
665 if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
666 rprintf(FINFO,
667 "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
668 big_num(sum->count), (long)sum->remainder, (long)sum->blength,
669 sum->s2length, big_num(sum->flength));
670 }
671 }
672
673
674 /*
675 * Generate and send a stream of signatures/checksums that describe a buffer
676 *
677 * Generate approximately one checksum every block_len bytes.
678 */
679 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
680 {
681 int32 i;
682 struct map_struct *mapbuf;
683 struct sum_struct sum;
684 OFF_T offset = 0;
685
686 sum_sizes_sqroot(&sum, len);
687 if (sum.count < 0)
688 return -1;
689 write_sum_head(f_out, &sum);
690
691 if (append_mode > 0 && f_copy < 0)
692 return 0;
693
694 if (len > 0)
695 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
696 else
697 mapbuf = NULL;
698
699 for (i = 0; i < sum.count; i++) {
700 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
701 char *map = map_ptr(mapbuf, offset, n1);
702 char sum2[SUM_LENGTH];
703 uint32 sum1;
704
705 len -= n1;
706 offset += n1;
707
708 if (f_copy >= 0) {
709 full_write(f_copy, map, n1);
710 if (append_mode > 0)
711 continue;
712 }
713
714 sum1 = get_checksum1(map, n1);
715 get_checksum2(map, n1, sum2);
716
717 if (DEBUG_GTE(DELTASUM, 3)) {
718 rprintf(FINFO,
719 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
720 big_num(i), big_num(offset - n1), (long)n1,
721 (unsigned long)sum1);
722 }
723 write_int(f_out, sum1);
724 write_buf(f_out, sum2, sum.s2length);
725 }
726
727 if (mapbuf)
728 unmap_file(mapbuf);
729
730 return 0;
731 }
732
733
734 /* Try to find a filename in the same dir as "fname" with a similar name. */
735 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
736 {
737 int fname_len, fname_suf_len;
738 const char *fname_suf, *fname = file->basename;
739 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
740 int i, j;
741 struct file_struct *lowest_fp = NULL;
742
743 fname_len = strlen(fname);
744 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
745
746 /* Try to find an exact size+mtime match first. */
747 for (i = 0; i < fuzzy_basis; i++) {
748 struct file_list *dirlist = dirlist_array[i];
749
750 if (!dirlist)
751 continue;
752
753 for (j = 0; j < dirlist->used; j++) {
754 struct file_struct *fp = dirlist->files[j];
755
756 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
757 continue;
758
759 if (F_LENGTH(fp) == F_LENGTH(file) && cmp_time(fp->modtime, file->modtime) == 0) {
760 if (DEBUG_GTE(FUZZY, 2))
761 rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
762 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
763 return fp;
764 }
765
766 }
767 }
768
769 for (i = 0; i < fuzzy_basis; i++) {
770 struct file_list *dirlist = dirlist_array[i];
771
772 if (!dirlist)
773 continue;
774
775 for (j = 0; j < dirlist->used; j++) {
776 struct file_struct *fp = dirlist->files[j];
777 const char *suf, *name;
778 int len, suf_len;
779 uint32 dist;
780
781 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
782 continue;
783
784 name = fp->basename;
785 len = strlen(name);
786 suf = find_filename_suffix(name, len, &suf_len);
787
788 dist = fuzzy_distance(name, len, fname, fname_len);
789 /* Add some extra weight to how well the suffixes match. */
790 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
791 if (DEBUG_GTE(FUZZY, 2)) {
792 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
793 f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
794 }
795 if (dist <= lowest_dist) {
796 lowest_dist = dist;
797 lowest_fp = fp;
798 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
799 }
800 }
801 }
802
803 return lowest_fp;
804 }
805
806 /* Copy a file found in our --copy-dest handling. */
807 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
808 {
809 char buf[MAXPATHLEN];
810 const char *copy_to, *partialptr;
811 int save_preserve_xattrs = preserve_xattrs;
812 int ok, fd_w;
813
814 if (inplace) {
815 /* Let copy_file open the destination in place. */
816 fd_w = -1;
817 copy_to = dest;
818 } else {
819 fd_w = open_tmpfile(buf, dest, file);
820 if (fd_w < 0)
821 return -1;
822 copy_to = buf;
823 }
824 cleanup_set(copy_to, NULL, NULL, -1, -1);
825 if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
826 if (INFO_GTE(COPY, 1)) {
827 rsyserr(FINFO, errno, "copy_file %s => %s",
828 full_fname(src), copy_to);
829 }
830 /* Try to clean up. */
831 unlink(copy_to);
832 cleanup_disable();
833 return -1;
834 }
835 partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
836 preserve_xattrs = 0; /* xattrs were copied with file */
837 ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
838 preserve_xattrs = save_preserve_xattrs;
839 cleanup_disable();
840 return ok ? 0 : -1;
841 }
842
843 /* This is only called for regular files. We return -2 if we've finished
844 * handling the file, -1 if no dest-linking occurred, or a non-negative
845 * value if we found an alternate basis file. If we're called with the
846 * find_exact_for_existing flag, the destination file already exists, so
847 * we only try to find an exact alt-dest match. In this case, the returns
848 * are only -2 & -1 (both as above). */
849 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
850 char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
851 int itemizing, enum logcode code)
852 {
853 STRUCT_STAT real_st = sxp->st;
854 int best_match = -1;
855 int match_level = 0;
856 int j = 0;
857
858 do {
859 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
860 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
861 continue;
862 switch (match_level) {
863 case 0:
864 best_match = j;
865 match_level = 1;
866 /* FALL THROUGH */
867 case 1:
868 if (!unchanged_file(cmpbuf, file, &sxp->st))
869 continue;
870 best_match = j;
871 match_level = 2;
872 /* FALL THROUGH */
873 case 2:
874 if (!unchanged_attrs(cmpbuf, file, sxp)) {
875 free_stat_x(sxp);
876 continue;
877 }
878 best_match = j;
879 match_level = 3;
880 break;
881 }
882 break;
883 } while (basis_dir[++j] != NULL);
884
885 if (!match_level)
886 return -1;
887
888 if (j != best_match) {
889 j = best_match;
890 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
891 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
892 return -1;
893 }
894
895 if (match_level == 3 && !copy_dest) {
896 if (find_exact_for_existing) {
897 if (link_dest && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
898 return -1;
899 if (do_unlink(fname) < 0 && errno != ENOENT) {
900 sxp->st = real_st;
901 return -1;
902 }
903 }
904 #ifdef SUPPORT_HARD_LINKS
905 if (link_dest) {
906 if (!hard_link_one(file, fname, cmpbuf, 1))
907 goto try_a_copy;
908 if (preserve_hard_links && F_IS_HLINKED(file))
909 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
910 if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
911 itemize(cmpbuf, file, ndx, 1, sxp,
912 ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
913 0, "");
914 }
915 } else
916 #endif
917 {
918 if (itemizing)
919 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
920 }
921 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
922 rprintf(FCLIENT, "%s is uptodate\n", fname);
923 return -2;
924 }
925
926 if (find_exact_for_existing) {
927 sxp->st = real_st;
928 return -1;
929 }
930
931 if (match_level >= 2) {
932 #ifdef SUPPORT_HARD_LINKS
933 try_a_copy: /* Copy the file locally. */
934 #endif
935 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
936 if (find_exact_for_existing) /* Can get here via hard-link failure */
937 sxp->st = real_st;
938 return -1;
939 }
940 if (itemizing)
941 itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
942 if (maybe_ATTRS_REPORT
943 && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
944 || (INFO_GTE(NAME, 2) && match_level == 3))) {
945 code = match_level == 3 ? FCLIENT : FINFO;
946 rprintf(code, "%s%s\n", fname,
947 match_level == 3 ? " is uptodate" : "");
948 }
949 #ifdef SUPPORT_HARD_LINKS
950 if (preserve_hard_links && F_IS_HLINKED(file))
951 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
952 #endif
953 return -2;
954 }
955
956 return FNAMECMP_BASIS_DIR_LOW + j;
957 }
958
959 /* This is only called for non-regular files. We return -2 if we've finished
960 * handling the file, or -1 if no dest-linking occurred, or a non-negative
961 * value if we found an alternate basis file. */
962 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
963 char *cmpbuf, stat_x *sxp, int itemizing,
964 enum logcode code)
965 {
966 int best_match = -1;
967 int match_level = 0;
968 enum nonregtype type;
969 uint32 *devp;
970 #ifdef SUPPORT_LINKS
971 char lnk[MAXPATHLEN];
972 int len;
973 #endif
974 int j = 0;
975
976 #ifndef SUPPORT_LINKS
977 if (S_ISLNK(file->mode))
978 return -1;
979 #endif
980 if (S_ISDIR(file->mode)) {
981 type = TYPE_DIR;
982 } else if (IS_SPECIAL(file->mode))
983 type = TYPE_SPECIAL;
984 else if (IS_DEVICE(file->mode))
985 type = TYPE_DEVICE;
986 #ifdef SUPPORT_LINKS
987 else if (S_ISLNK(file->mode))
988 type = TYPE_SYMLINK;
989 #endif
990 else {
991 rprintf(FERROR,
992 "internal: try_dests_non() called with invalid mode (%o)\n",
993 (int)file->mode);
994 exit_cleanup(RERR_UNSUPPORTED);
995 }
996
997 do {
998 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
999 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1000 continue;
1001 switch (type) {
1002 case TYPE_DIR:
1003 if (!S_ISDIR(sxp->st.st_mode))
1004 continue;
1005 break;
1006 case TYPE_SPECIAL:
1007 if (!IS_SPECIAL(sxp->st.st_mode))
1008 continue;
1009 break;
1010 case TYPE_DEVICE:
1011 if (!IS_DEVICE(sxp->st.st_mode))
1012 continue;
1013 break;
1014 case TYPE_SYMLINK:
1015 #ifdef SUPPORT_LINKS
1016 if (!S_ISLNK(sxp->st.st_mode))
1017 continue;
1018 break;
1019 #else
1020 return -1;
1021 #endif
1022 }
1023 if (match_level < 1) {
1024 match_level = 1;
1025 best_match = j;
1026 }
1027 switch (type) {
1028 case TYPE_DIR:
1029 case TYPE_SPECIAL:
1030 break;
1031 case TYPE_DEVICE:
1032 devp = F_RDEV_P(file);
1033 if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1034 continue;
1035 break;
1036 case TYPE_SYMLINK:
1037 #ifdef SUPPORT_LINKS
1038 if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1039 continue;
1040 lnk[len] = '\0';
1041 if (strcmp(lnk, F_SYMLINK(file)) != 0)
1042 continue;
1043 break;
1044 #else
1045 return -1;
1046 #endif
1047 }
1048 if (match_level < 2) {
1049 match_level = 2;
1050 best_match = j;
1051 }
1052 if (unchanged_attrs(cmpbuf, file, sxp)) {
1053 match_level = 3;
1054 best_match = j;
1055 break;
1056 }
1057 } while (basis_dir[++j] != NULL);
1058
1059 if (!match_level)
1060 return -1;
1061
1062 if (j != best_match) {
1063 j = best_match;
1064 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1065 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1066 return -1;
1067 }
1068
1069 if (match_level == 3) {
1070 #ifdef SUPPORT_HARD_LINKS
1071 if (link_dest
1072 #ifndef CAN_HARDLINK_SYMLINK
1073 && !S_ISLNK(file->mode)
1074 #endif
1075 #ifndef CAN_HARDLINK_SPECIAL
1076 && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1077 #endif
1078 && !S_ISDIR(file->mode)) {
1079 if (do_link(cmpbuf, fname) < 0) {
1080 rsyserr(FERROR_XFER, errno,
1081 "failed to hard-link %s with %s",
1082 cmpbuf, fname);
1083 return j;
1084 }
1085 if (preserve_hard_links && F_IS_HLINKED(file))
1086 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1087 } else
1088 #endif
1089 match_level = 2;
1090 if (itemizing && stdout_format_has_i
1091 && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1092 int chg = compare_dest && type != TYPE_DIR ? 0
1093 : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1094 char *lp = match_level == 3 ? "" : NULL;
1095 itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1096 }
1097 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1098 rprintf(FCLIENT, "%s%s is uptodate\n",
1099 fname, type == TYPE_DIR ? "/" : "");
1100 }
1101 return -2;
1102 }
1103
1104 return j;
1105 }
1106
1107 static void list_file_entry(struct file_struct *f)
1108 {
1109 char permbuf[PERMSTRING_SIZE];
1110 int64 len;
1111 int colwidth = human_readable ? 14 : 11;
1112
1113 if (!F_IS_ACTIVE(f)) {
1114 /* this can happen if duplicate names were removed */
1115 return;
1116 }
1117
1118 permstring(permbuf, f->mode);
1119 len = F_LENGTH(f);
1120
1121 /* TODO: indicate '+' if the entry has an ACL. */
1122
1123 #ifdef SUPPORT_LINKS
1124 if (preserve_links && S_ISLNK(f->mode)) {
1125 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1126 permbuf, colwidth, human_num(len),
1127 timestring(f->modtime), f_name(f, NULL),
1128 F_SYMLINK(f));
1129 } else
1130 #endif
1131 if (missing_args == 2 && f->mode == 0) {
1132 rprintf(FINFO, "%-*s %s\n",
1133 colwidth + 31, "*missing",
1134 f_name(f, NULL));
1135 } else {
1136 rprintf(FINFO, "%s %*s %s %s\n",
1137 permbuf, colwidth, human_num(len),
1138 timestring(f->modtime), f_name(f, NULL));
1139 }
1140 }
1141
1142 static int phase = 0;
1143 static int dflt_perms;
1144
1145 static int implied_dirs_are_missing;
1146 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1147 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1148 {
1149 return F_DEPTH(file) > F_DEPTH(subtree)
1150 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1151 }
1152
1153 /* Acts on the indicated item in cur_flist whose name is fname. If a dir,
1154 * make sure it exists, and has the right permissions/timestamp info. For
1155 * all other non-regular files (symlinks, etc.) we create them here. For
1156 * regular files that have changed, we try to find a basis file and then
1157 * start sending checksums. The ndx is the file's unique index value.
1158 *
1159 * The fname parameter must point to a MAXPATHLEN buffer! (e.g it gets
1160 * passed to delete_item(), which can use it during a recursive delete.)
1161 *
1162 * Note that f_out is set to -1 when doing final directory-permission and
1163 * modification-time repair. */
1164 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1165 int itemizing, enum logcode code, int f_out)
1166 {
1167 static const char *parent_dirname = "";
1168 /* Missing dir not created due to --dry-run; will still be scanned. */
1169 static struct file_struct *dry_missing_dir = NULL;
1170 /* Missing dir whose contents are skipped altogether due to
1171 * --ignore-non-existing, daemon exclude, or mkdir failure. */
1172 static struct file_struct *skip_dir = NULL;
1173 static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1174 static int need_fuzzy_dirlist = 0;
1175 struct file_struct *fuzzy_file = NULL;
1176 int fd = -1, f_copy = -1;
1177 stat_x sx, real_sx;
1178 STRUCT_STAT partial_st;
1179 struct file_struct *back_file = NULL;
1180 int statret, real_ret, stat_errno;
1181 char *fnamecmp, *partialptr, *backupptr = NULL;
1182 char fnamecmpbuf[MAXPATHLEN];
1183 uchar fnamecmp_type;
1184 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1185 int is_dir = !S_ISDIR(file->mode) ? 0
1186 : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1187 : 1;
1188
1189 if (DEBUG_GTE(GENR, 1))
1190 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1191
1192 if (list_only) {
1193 if (is_dir < 0
1194 || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1195 return;
1196 list_file_entry(file);
1197 return;
1198 }
1199
1200 if (skip_dir) {
1201 if (is_below(file, skip_dir)) {
1202 if (is_dir)
1203 file->flags |= FLAG_MISSING_DIR;
1204 #ifdef SUPPORT_HARD_LINKS
1205 else if (F_IS_HLINKED(file))
1206 handle_skipped_hlink(file, itemizing, code, f_out);
1207 #endif
1208 return;
1209 }
1210 skip_dir = NULL;
1211 }
1212
1213 init_stat_x(&sx);
1214 if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1215 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1216 if (is_dir < 0)
1217 return;
1218 #ifdef SUPPORT_HARD_LINKS
1219 if (F_IS_HLINKED(file))
1220 handle_skipped_hlink(file, itemizing, code, f_out);
1221 #endif
1222 rprintf(FERROR_XFER,
1223 "ERROR: daemon refused to receive %s \"%s\"\n",
1224 is_dir ? "directory" : "file", fname);
1225 if (is_dir)
1226 goto skipping_dir_contents;
1227 return;
1228 }
1229 }
1230
1231 if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1232 int i;
1233 parent_is_dry_missing:
1234 for (i = 0; i < fuzzy_basis; i++) {
1235 if (fuzzy_dirlist[i]) {
1236 flist_free(fuzzy_dirlist[i]);
1237 fuzzy_dirlist[i] = NULL;
1238 }
1239 }
1240 parent_dirname = "";
1241 statret = -1;
1242 stat_errno = ENOENT;
1243 } else {
1244 const char *dn = file->dirname ? file->dirname : ".";
1245 dry_missing_dir = NULL;
1246 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1247 if (relative_paths && !implied_dirs
1248 && do_stat(dn, &sx.st) < 0) {
1249 if (dry_run)
1250 goto parent_is_dry_missing;
1251 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1252 rsyserr(FERROR_XFER, errno,
1253 "recv_generator: mkdir %s failed",
1254 full_fname(dn));
1255 }
1256 }
1257 if (fuzzy_basis) {
1258 int i;
1259 for (i = 0; i < fuzzy_basis; i++) {
1260 if (fuzzy_dirlist[i]) {
1261 flist_free(fuzzy_dirlist[i]);
1262 fuzzy_dirlist[i] = NULL;
1263 }
1264 }
1265 need_fuzzy_dirlist = 1;
1266 }
1267 #ifdef SUPPORT_ACLS
1268 if (!preserve_perms)
1269 dflt_perms = default_perms_for_dir(dn);
1270 #endif
1271 }
1272 parent_dirname = dn;
1273
1274 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1275 int i;
1276 strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1277 for (i = 0; i < fuzzy_basis; i++) {
1278 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1279 continue;
1280 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1281 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1282 flist_free(fuzzy_dirlist[i]);
1283 fuzzy_dirlist[i] = NULL;
1284 }
1285 }
1286 need_fuzzy_dirlist = 0;
1287 }
1288
1289 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1290 stat_errno = errno;
1291 }
1292
1293 if (missing_args == 2 && file->mode == 0) {
1294 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1295 return;
1296 if (statret == 0)
1297 delete_item(fname, sx.st.st_mode, del_opts);
1298 return;
1299 }
1300
1301 if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1302 if (is_dir) {
1303 if (is_dir < 0)
1304 return;
1305 skip_dir = file;
1306 file->flags |= FLAG_MISSING_DIR;
1307 }
1308 #ifdef SUPPORT_HARD_LINKS
1309 else if (F_IS_HLINKED(file))
1310 handle_skipped_hlink(file, itemizing, code, f_out);
1311 #endif
1312 if (INFO_GTE(SKIP, 1)) {
1313 rprintf(FINFO, "not creating new %s \"%s\"\n",
1314 is_dir ? "directory" : "file", fname);
1315 }
1316 return;
1317 }
1318
1319 if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1320 && !am_root && sx.st.st_uid == our_uid)
1321 del_opts |= DEL_NO_UID_WRITE;
1322
1323 if (ignore_existing > 0 && statret == 0
1324 && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1325 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1326 rprintf(FINFO, "%s exists\n", fname);
1327 #ifdef SUPPORT_HARD_LINKS
1328 if (F_IS_HLINKED(file))
1329 handle_skipped_hlink(file, itemizing, code, f_out);
1330 #endif
1331 goto cleanup;
1332 }
1333
1334 fnamecmp = fname;
1335
1336 if (is_dir) {
1337 mode_t added_perms;
1338 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1339 goto cleanup;
1340 if (am_root < 0) {
1341 /* For --fake-super, the dir must be useable by the copying
1342 * user, just like it would be for root. */
1343 added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1344 } else
1345 added_perms = 0;
1346 if (is_dir < 0) {
1347 /* In inc_recurse mode we want to make sure any missing
1348 * directories get created while we're still processing
1349 * the parent dir (which allows us to touch the parent
1350 * dir's mtime right away). We will handle the dir in
1351 * full later (right before we handle its contents). */
1352 if (statret == 0
1353 && (S_ISDIR(sx.st.st_mode)
1354 || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1355 goto cleanup; /* Any errors get reported later. */
1356 if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1357 file->flags |= FLAG_DIR_CREATED;
1358 goto cleanup;
1359 }
1360 /* The file to be received is a directory, so we need
1361 * to prepare appropriately. If there is already a
1362 * file of that name and it is *not* a directory, then
1363 * we need to delete it. If it doesn't exist, then
1364 * (perhaps recursively) create it. */
1365 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1366 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1367 goto skipping_dir_contents;
1368 statret = -1;
1369 }
1370 if (dry_run && statret != 0) {
1371 if (!dry_missing_dir)
1372 dry_missing_dir = file;
1373 file->flags |= FLAG_MISSING_DIR;
1374 }
1375 init_stat_x(&real_sx);
1376 real_sx.st = sx.st;
1377 real_ret = statret;
1378 if (file->flags & FLAG_DIR_CREATED)
1379 statret = -1;
1380 if (!preserve_perms) { /* See comment in non-dir code below. */
1381 file->mode = dest_mode(file->mode, sx.st.st_mode,
1382 dflt_perms, statret == 0);
1383 }
1384 if (statret != 0 && basis_dir[0] != NULL) {
1385 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1386 itemizing, code);
1387 if (j == -2) {
1388 itemizing = 0;
1389 code = FNONE;
1390 statret = 1;
1391 } else if (j >= 0) {
1392 statret = 1;
1393 fnamecmp = fnamecmpbuf;
1394 }
1395 }
1396 if (itemizing && f_out != -1) {
1397 itemize(fnamecmp, file, ndx, statret, &sx,
1398 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1399 }
1400 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1401 if (!relative_paths || errno != ENOENT
1402 || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1403 || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1404 rsyserr(FERROR_XFER, errno,
1405 "recv_generator: mkdir %s failed",
1406 full_fname(fname));
1407 skipping_dir_contents:
1408 rprintf(FERROR,
1409 "*** Skipping any contents from this failed directory ***\n");
1410 skip_dir = file;
1411 file->flags |= FLAG_MISSING_DIR;
1412 goto cleanup;
1413 }
1414 }
1415
1416 #ifdef SUPPORT_XATTRS
1417 if (preserve_xattrs && statret == 1)
1418 copy_xattrs(fnamecmpbuf, fname);
1419 #endif
1420 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1421 && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1422 rprintf(code, "%s/\n", fname);
1423
1424 /* We need to ensure that the dirs in the transfer have both
1425 * readable and writable permissions during the time we are
1426 * putting files within them. This is then restored to the
1427 * former permissions after the transfer is done. */
1428 #ifdef HAVE_CHMOD
1429 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1430 mode_t mode = file->mode | S_IRWXU;
1431 if (do_chmod(fname, mode) < 0) {
1432 rsyserr(FERROR_XFER, errno,
1433 "failed to modify permissions on %s",
1434 full_fname(fname));
1435 }
1436 need_retouch_dir_perms = 1;
1437 }
1438 #endif
1439
1440 if (real_ret != 0 && one_file_system)
1441 real_sx.st.st_dev = filesystem_dev;
1442 if (inc_recurse) {
1443 if (one_file_system) {
1444 uint32 *devp = F_DIR_DEV_P(file);
1445 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1446 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1447 }
1448 }
1449 else if (delete_during && f_out != -1 && !phase
1450 && !(file->flags & FLAG_MISSING_DIR)) {
1451 if (file->flags & FLAG_CONTENT_DIR)
1452 delete_in_dir(fname, file, &real_sx.st.st_dev);
1453 else
1454 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1455 }
1456 goto cleanup;
1457 }
1458
1459 /* If we're not preserving permissions, change the file-list's
1460 * mode based on the local permissions and some heuristics. */
1461 if (!preserve_perms) {
1462 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1463 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1464 exists);
1465 }
1466
1467 #ifdef SUPPORT_HARD_LINKS
1468 if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1469 && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1470 goto cleanup;
1471 #endif
1472
1473 if (preserve_links && S_ISLNK(file->mode)) {
1474 #ifdef SUPPORT_LINKS
1475 const char *sl = F_SYMLINK(file);
1476 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1477 if (INFO_GTE(NAME, 1)) {
1478 if (solo_file) {
1479 /* fname contains the destination path, but we
1480 * want to report the source path. */
1481 fname = f_name(file, NULL);
1482 }
1483 rprintf(FINFO,
1484 "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1485 fname, sl);
1486 }
1487 return;
1488 }
1489 if (statret == 0) {
1490 char lnk[MAXPATHLEN];
1491 int len;
1492
1493 if (S_ISLNK(sx.st.st_mode)
1494 && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1495 && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1496 /* The link is pointing to the right place. */
1497 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1498 if (itemizing)
1499 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1500 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1501 if (preserve_hard_links && F_IS_HLINKED(file))
1502 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1503 #endif
1504 if (remove_source_files == 1)
1505 goto return_with_success;
1506 goto cleanup;
1507 }
1508 } else if (basis_dir[0] != NULL) {
1509 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1510 itemizing, code);
1511 if (j == -2) {
1512 #ifndef CAN_HARDLINK_SYMLINK
1513 if (link_dest) {
1514 /* Resort to --copy-dest behavior. */
1515 } else
1516 #endif
1517 if (!copy_dest)
1518 goto cleanup;
1519 itemizing = 0;
1520 code = FNONE;
1521 } else if (j >= 0) {
1522 statret = 1;
1523 fnamecmp = fnamecmpbuf;
1524 }
1525 }
1526 if (atomic_create(file, fname, sl, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1527 set_file_attrs(fname, file, NULL, NULL, 0);
1528 if (itemizing) {
1529 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1530 statret = -1;
1531 itemize(fnamecmp, file, ndx, statret, &sx,
1532 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1533 }
1534 if (code != FNONE && INFO_GTE(NAME, 1))
1535 rprintf(code, "%s -> %s\n", fname, sl);
1536 #ifdef SUPPORT_HARD_LINKS
1537 if (preserve_hard_links && F_IS_HLINKED(file))
1538 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1539 #endif
1540 /* This does not check remove_source_files == 1
1541 * because this is one of the items that the old
1542 * --remove-sent-files option would remove. */
1543 if (remove_source_files)
1544 goto return_with_success;
1545 }
1546 #endif
1547 goto cleanup;
1548 }
1549
1550 if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1551 || (preserve_specials && IS_SPECIAL(file->mode))) {
1552 dev_t rdev;
1553 int del_for_flag = 0;
1554 if (IS_DEVICE(file->mode)) {
1555 uint32 *devp = F_RDEV_P(file);
1556 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1557 } else
1558 rdev = 0;
1559 if (statret == 0) {
1560 if (IS_DEVICE(file->mode)) {
1561 if (!IS_DEVICE(sx.st.st_mode))
1562 statret = -1;
1563 del_for_flag = DEL_FOR_DEVICE;
1564 } else {
1565 if (!IS_SPECIAL(sx.st.st_mode))
1566 statret = -1;
1567 del_for_flag = DEL_FOR_SPECIAL;
1568 }
1569 if (statret == 0
1570 && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1571 && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1572 /* The device or special file is identical. */
1573 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1574 if (itemizing)
1575 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1576 #ifdef SUPPORT_HARD_LINKS
1577 if (preserve_hard_links && F_IS_HLINKED(file))
1578 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1579 #endif
1580 if (remove_source_files == 1)
1581 goto return_with_success;
1582 goto cleanup;
1583 }
1584 } else if (basis_dir[0] != NULL) {
1585 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1586 itemizing, code);
1587 if (j == -2) {
1588 #ifndef CAN_HARDLINK_SPECIAL
1589 if (link_dest) {
1590 /* Resort to --copy-dest behavior. */
1591 } else
1592 #endif
1593 if (!copy_dest)
1594 goto cleanup;
1595 itemizing = 0;
1596 code = FNONE;
1597 } else if (j >= 0) {
1598 statret = 1;
1599 fnamecmp = fnamecmpbuf;
1600 }
1601 }
1602 if (DEBUG_GTE(GENR, 1)) {
1603 rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1604 fname, (int)file->mode,
1605 (long)major(rdev), (long)minor(rdev));
1606 }
1607 if (atomic_create(file, fname, NULL, rdev, &sx, del_for_flag)) {
1608 set_file_attrs(fname, file, NULL, NULL, 0);
1609 if (itemizing) {
1610 itemize(fnamecmp, file, ndx, statret, &sx,
1611 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1612 }
1613 if (code != FNONE && INFO_GTE(NAME, 1))
1614 rprintf(code, "%s\n", fname);
1615 #ifdef SUPPORT_HARD_LINKS
1616 if (preserve_hard_links && F_IS_HLINKED(file))
1617 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1618 #endif
1619 if (remove_source_files == 1)
1620 goto return_with_success;
1621 }
1622 goto cleanup;
1623 }
1624
1625 if (!S_ISREG(file->mode)) {
1626 if (solo_file)
1627 fname = f_name(file, NULL);
1628 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1629 goto cleanup;
1630 }
1631
1632 if (max_size >= 0 && F_LENGTH(file) > max_size) {
1633 if (INFO_GTE(SKIP, 1)) {
1634 if (solo_file)
1635 fname = f_name(file, NULL);
1636 rprintf(FINFO, "%s is over max-size\n", fname);
1637 }
1638 goto cleanup;
1639 }
1640 if (min_size >= 0 && F_LENGTH(file) < min_size) {
1641 if (INFO_GTE(SKIP, 1)) {
1642 if (solo_file)
1643 fname = f_name(file, NULL);
1644 rprintf(FINFO, "%s is under min-size\n", fname);
1645 }
1646 goto cleanup;
1647 }
1648
1649 if (update_only > 0 && statret == 0
1650 && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1651 if (INFO_GTE(SKIP, 1))
1652 rprintf(FINFO, "%s is newer\n", fname);
1653 #ifdef SUPPORT_HARD_LINKS
1654 if (F_IS_HLINKED(file))
1655 handle_skipped_hlink(file, itemizing, code, f_out);
1656 #endif
1657 goto cleanup;
1658 }
1659
1660 fnamecmp_type = FNAMECMP_FNAME;
1661
1662 if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1663 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1664 goto cleanup;
1665 statret = -1;
1666 stat_errno = ENOENT;
1667 }
1668
1669 if (basis_dir[0] != NULL && (statret != 0 || !copy_dest)) {
1670 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1671 statret == 0, itemizing, code);
1672 if (j == -2) {
1673 if (remove_source_files == 1)
1674 goto return_with_success;
1675 goto cleanup;
1676 }
1677 if (j >= 0) {
1678 fnamecmp = fnamecmpbuf;
1679 fnamecmp_type = j;
1680 statret = 0;
1681 }
1682 }
1683
1684 init_stat_x(&real_sx);
1685 real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1686 real_ret = statret;
1687
1688 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1689 && link_stat(partialptr, &partial_st, 0) == 0
1690 && S_ISREG(partial_st.st_mode)) {
1691 if (statret != 0)
1692 goto prepare_to_open;
1693 } else
1694 partialptr = NULL;
1695
1696 if (statret != 0 && fuzzy_basis) {
1697 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1698 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1699 if (fuzzy_file) {
1700 f_name(fuzzy_file, fnamecmpbuf);
1701 if (DEBUG_GTE(FUZZY, 1)) {
1702 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1703 fname, fnamecmpbuf);
1704 }
1705 sx.st.st_size = F_LENGTH(fuzzy_file);
1706 statret = 0;
1707 fnamecmp = fnamecmpbuf;
1708 }
1709 }
1710
1711 if (statret != 0) {
1712 #ifdef SUPPORT_HARD_LINKS
1713 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1714 cur_flist->in_progress++;
1715 goto cleanup;
1716 }
1717 #endif
1718 if (stat_errno == ENOENT)
1719 goto notify_others;
1720 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1721 full_fname(fname));
1722 goto cleanup;
1723 }
1724
1725 if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1726 ;
1727 else if (fnamecmp_type == FNAMECMP_FUZZY)
1728 ;
1729 else if (unchanged_file(fnamecmp, file, &sx.st)) {
1730 if (partialptr) {
1731 do_unlink(partialptr);
1732 handle_partial_dir(partialptr, PDIR_DELETE);
1733 }
1734 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1735 if (itemizing)
1736 itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1737 #ifdef SUPPORT_HARD_LINKS
1738 if (preserve_hard_links && F_IS_HLINKED(file))
1739 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1740 #endif
1741 if (remove_source_files != 1)
1742 goto cleanup;
1743 return_with_success:
1744 if (!dry_run)
1745 send_msg_int(MSG_SUCCESS, ndx);
1746 goto cleanup;
1747 }
1748
1749 if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1750 #ifdef SUPPORT_HARD_LINKS
1751 if (F_IS_HLINKED(file))
1752 handle_skipped_hlink(file, itemizing, code, f_out);
1753 #endif
1754 goto cleanup;
1755 }
1756
1757 prepare_to_open:
1758 if (partialptr) {
1759 sx.st = partial_st;
1760 fnamecmp = partialptr;
1761 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1762 statret = 0;
1763 }
1764
1765 if (!do_xfers)
1766 goto notify_others;
1767
1768 if (read_batch || whole_file) {
1769 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1770 if (!(backupptr = get_backup_name(fname)))
1771 goto cleanup;
1772 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1773 goto pretend_missing;
1774 if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1775 unmake_file(back_file);
1776 back_file = NULL;
1777 goto cleanup;
1778 }
1779 }
1780 goto notify_others;
1781 }
1782
1783 if (fuzzy_dirlist[0]) {
1784 int j = flist_find(fuzzy_dirlist[0], file);
1785 if (j >= 0) /* don't use changing file as future fuzzy basis */
1786 fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1787 }
1788
1789 /* open the file */
1790 if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1791 rsyserr(FERROR, errno, "failed to open %s, continuing",
1792 full_fname(fnamecmp));
1793 pretend_missing:
1794 /* pretend the file didn't exist */
1795 #ifdef SUPPORT_HARD_LINKS
1796 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1797 cur_flist->in_progress++;
1798 goto cleanup;
1799 }
1800 #endif
1801 statret = real_ret = -1;
1802 goto notify_others;
1803 }
1804
1805 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1806 if (!(backupptr = get_backup_name(fname))) {
1807 close(fd);
1808 goto cleanup;
1809 }
1810 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1811 close(fd);
1812 goto pretend_missing;
1813 }
1814 if (robust_unlink(backupptr) && errno != ENOENT) {
1815 rsyserr(FERROR_XFER, errno, "unlink %s",
1816 full_fname(backupptr));
1817 unmake_file(back_file);
1818 back_file = NULL;
1819 close(fd);
1820 goto cleanup;
1821 }
1822 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1823 rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1824 unmake_file(back_file);
1825 back_file = NULL;
1826 close(fd);
1827 goto cleanup;
1828 }
1829 fnamecmp_type = FNAMECMP_BACKUP;
1830 }
1831
1832 if (DEBUG_GTE(DELTASUM, 3)) {
1833 rprintf(FINFO, "gen mapped %s of size %s\n",
1834 fnamecmp, big_num(sx.st.st_size));
1835 }
1836
1837 if (DEBUG_GTE(DELTASUM, 2))
1838 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1839
1840 notify_others:
1841 if (remove_source_files && !delay_updates && !phase && !dry_run)
1842 increment_active_files(ndx, itemizing, code);
1843 if (inc_recurse && (!dry_run || write_batch < 0))
1844 cur_flist->in_progress++;
1845 #ifdef SUPPORT_HARD_LINKS
1846 if (preserve_hard_links && F_IS_HLINKED(file))
1847 file->flags |= FLAG_FILE_SENT;
1848 #endif
1849 write_ndx(f_out, ndx);
1850 if (itemizing) {
1851 int iflags = ITEM_TRANSFER;
1852 if (always_checksum > 0)
1853 iflags |= ITEM_REPORT_CHANGE;
1854 if (fnamecmp_type != FNAMECMP_FNAME)
1855 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1856 if (fnamecmp_type >= FNAMECMP_FUZZY)
1857 iflags |= ITEM_XNAME_FOLLOWS;
1858 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1859 fuzzy_file ? fuzzy_file->basename : NULL);
1860 free_stat_x(&real_sx);
1861 }
1862
1863 if (!do_xfers) {
1864 #ifdef SUPPORT_HARD_LINKS
1865 if (preserve_hard_links && F_IS_HLINKED(file))
1866 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1867 #endif
1868 goto cleanup;
1869 }
1870 if (read_batch)
1871 goto cleanup;
1872
1873 if (statret != 0 || whole_file)
1874 write_sum_head(f_out, NULL);
1875 else if (sx.st.st_size <= 0) {
1876 write_sum_head(f_out, NULL);
1877 close(fd);
1878 } else {
1879 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1880 rprintf(FWARNING,
1881 "WARNING: file is too large for checksum sending: %s\n",
1882 fnamecmp);
1883 write_sum_head(f_out, NULL);
1884 }
1885 close(fd);
1886 }
1887
1888 cleanup:
1889 if (back_file) {
1890 int save_preserve_xattrs = preserve_xattrs;
1891 if (f_copy >= 0)
1892 close(f_copy);
1893 #ifdef SUPPORT_XATTRS
1894 if (preserve_xattrs) {
1895 copy_xattrs(fname, backupptr);
1896 preserve_xattrs = 0;
1897 }
1898 #endif
1899 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1900 preserve_xattrs = save_preserve_xattrs;
1901 if (INFO_GTE(BACKUP, 1)) {
1902 rprintf(FINFO, "backed up %s to %s\n",
1903 fname, backupptr);
1904 }
1905 unmake_file(back_file);
1906 }
1907
1908 free_stat_x(&sx);
1909 }
1910
1911 /* If we are replacing an existing hard link, symlink, device, or special file,
1912 * create a temp-name item and rename it into place. Only a symlink or hard
1913 * link puts a non-NULL value into the lnk arg. Only a device puts a non-0
1914 * value into the rdev arg. Specify 0 for the del_for_flag if there is not a
1915 * file to replace. This returns 1 on success and 0 on failure. */
1916 int atomic_create(struct file_struct *file, char *fname, const char *lnk,
1917 dev_t rdev, stat_x *sxp, int del_for_flag)
1918 {
1919 char tmpname[MAXPATHLEN];
1920 const char *create_name;
1921 int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1922
1923 if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1924 skip_atomic = 1;
1925 else
1926 skip_atomic = 0;
1927
1928 if (del_for_flag) {
1929 if (make_backups > 0 && !dir_in_the_way) {
1930 if (!make_backup(fname, skip_atomic))
1931 return 0;
1932 } else if (skip_atomic) {
1933 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1934 if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1935 return 0;
1936 }
1937 }
1938
1939 create_name = skip_atomic ? fname : tmpname;
1940
1941 if (lnk) {
1942 #ifdef SUPPORT_LINKS
1943 if (S_ISLNK(file->mode)
1944 #ifdef SUPPORT_HARD_LINKS /* The first symlink in a hard-linked cluster is always created. */
1945 && (!F_IS_HLINKED(file) || file->flags & FLAG_HLINK_FIRST)
1946 #endif
1947 ) {
1948 if (do_symlink(lnk, create_name) < 0) {
1949 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1950 full_fname(create_name), lnk);
1951 return 0;
1952 }
1953 } else
1954 #endif
1955 #ifdef SUPPORT_HARD_LINKS
1956 if (!hard_link_one(file, create_name, lnk, 0))
1957 return 0;
1958 #endif
1959 } else {
1960 if (do_mknod(create_name, file->mode, rdev) < 0) {
1961 rsyserr(FERROR_XFER, errno, "mknod %s failed",
1962 full_fname(create_name));
1963 return 0;
1964 }
1965 }
1966
1967 if (!skip_atomic) {
1968 if (do_rename(tmpname, fname) < 0) {
1969 rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
1970 full_fname(tmpname), full_fname(fname));
1971 do_unlink(tmpname);
1972 return 0;
1973 }
1974 }
1975
1976 return 1;
1977 }
1978
1979 #ifdef SUPPORT_HARD_LINKS
1980 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1981 enum logcode code, int f_out)
1982 {
1983 char fbuf[MAXPATHLEN];
1984 int new_last_ndx;
1985 struct file_list *save_flist = cur_flist;
1986
1987 /* If we skip the last item in a chain of links and there was a
1988 * prior non-skipped hard-link waiting to finish, finish it now. */
1989 if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1990 return;
1991
1992 file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1993 cur_flist->in_progress--; /* undo prior increment */
1994 f_name(file, fbuf);
1995 recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1996
1997 cur_flist = save_flist;
1998 }
1999 #endif
2000
2001 static void touch_up_dirs(struct file_list *flist, int ndx)
2002 {
2003 static int counter = 0;
2004 struct file_struct *file;
2005 char *fname;
2006 BOOL fix_dir_perms;
2007 int i, start, end;
2008
2009 if (ndx < 0) {
2010 start = 0;
2011 end = flist->used - 1;
2012 } else
2013 start = end = ndx;
2014
2015 /* Fix any directory permissions that were modified during the
2016 * transfer and/or re-set any tweaked modified-time values. */
2017 for (i = start; i <= end; i++, counter++) {
2018 file = flist->files[i];
2019 if (!S_ISDIR(file->mode)
2020 || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2021 continue;
2022 if (DEBUG_GTE(TIME, 2)) {
2023 fname = f_name(file, NULL);
2024 rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2025 NS(fname), i);
2026 }
2027 /* Be sure not to retouch permissions with --fake-super. */
2028 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2029 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2030 || !(need_retouch_dir_times || fix_dir_perms))
2031 continue;
2032 fname = f_name(file, NULL);
2033 if (fix_dir_perms)
2034 do_chmod(fname, file->mode);
2035 if (need_retouch_dir_times) {
2036 STRUCT_STAT st;
2037 if (link_stat(fname, &st, 0) == 0
2038 && cmp_time(st.st_mtime, file->modtime) != 0)
2039 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
2040 }
2041 if (counter >= loopchk_limit) {
2042 if (allowed_lull)
2043 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2044 else
2045 maybe_flush_socket(0);
2046 counter = 0;
2047 }
2048 }
2049 }
2050
2051 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2052 {
2053 struct file_struct *file;
2054 struct file_list *flist;
2055 char fbuf[MAXPATHLEN];
2056 int ndx;
2057
2058 while (1) {
2059 #ifdef SUPPORT_HARD_LINKS
2060 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2061 int send_failed = (ndx == -2);
2062 if (send_failed)
2063 ndx = get_hlink_num();
2064 flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2065 file = flist->files[ndx - flist->ndx_start];
2066 assert(file->flags & FLAG_HLINKED);
2067 if (send_failed)
2068 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2069 else
2070 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2071 flist->in_progress--;
2072 continue;
2073 }
2074 #endif
2075
2076 if (check_redo && (ndx = get_redo_num()) != -1) {
2077 OFF_T save_max_size = max_size;
2078 OFF_T save_min_size = min_size;
2079 csum_length = SUM_LENGTH;
2080 max_size = -1;
2081 min_size = -1;
2082 ignore_existing = -ignore_existing;
2083 ignore_non_existing = -ignore_non_existing;
2084 update_only = -update_only;
2085 always_checksum = -always_checksum;
2086 size_only = -size_only;
2087 append_mode = -append_mode;
2088 make_backups = -make_backups; /* avoid dup backup w/inplace */
2089 ignore_times++;
2090
2091 flist = cur_flist;
2092 cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2093
2094 file = cur_flist->files[ndx - cur_flist->ndx_start];
2095 if (solo_file)
2096 strlcpy(fbuf, solo_file, sizeof fbuf);
2097 else
2098 f_name(file, fbuf);
2099 recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2100 cur_flist->to_redo--;
2101
2102 cur_flist = flist;
2103
2104 csum_length = SHORT_SUM_LENGTH;
2105 max_size = save_max_size;
2106 min_size = save_min_size;
2107 ignore_existing = -ignore_existing;
2108 ignore_non_existing = -ignore_non_existing;
2109 update_only = -update_only;
2110 always_checksum = -always_checksum;
2111 size_only = -size_only;
2112 append_mode = -append_mode;
2113 make_backups = -make_backups;
2114 ignore_times--;
2115 continue;
2116 }
2117
2118 if (cur_flist == first_flist)
2119 break;
2120
2121 /* We only get here if inc_recurse is enabled. */
2122 if (first_flist->in_progress || first_flist->to_redo)
2123 break;
2124
2125 write_ndx(sock_f_out, NDX_DONE);
2126 if (!read_batch && !flist_eof) {
2127 int old_total = 0;
2128 for (flist = first_flist; flist != cur_flist; flist = flist->next)
2129 old_total += flist->used;
2130 maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2131 }
2132
2133 if (delete_during == 2 || !dir_tweaking) {
2134 /* Skip directory touch-up. */
2135 } else if (first_flist->parent_ndx >= 0)
2136 touch_up_dirs(dir_flist, first_flist->parent_ndx);
2137
2138 flist_free(first_flist); /* updates first_flist */
2139 }
2140 }
2141
2142 void generate_files(int f_out, const char *local_name)
2143 {
2144 int i, ndx, next_loopchk = 0;
2145 char fbuf[MAXPATHLEN];
2146 int itemizing;
2147 enum logcode code;
2148 int save_info_flist = info_levels[INFO_FLIST];
2149 int save_info_progress = info_levels[INFO_PROGRESS];
2150
2151 if (protocol_version >= 29) {
2152 itemizing = 1;
2153 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2154 code = logfile_format_has_i ? FNONE : FLOG;
2155 } else if (am_daemon) {
2156 itemizing = logfile_format_has_i && do_xfers;
2157 maybe_ATTRS_REPORT = ATTRS_REPORT;
2158 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2159 } else if (!am_server) {
2160 itemizing = stdout_format_has_i;
2161 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2162 code = itemizing ? FNONE : FINFO;
2163 } else {
2164 itemizing = 0;
2165 maybe_ATTRS_REPORT = ATTRS_REPORT;
2166 code = FINFO;
2167 }
2168 solo_file = local_name;
2169 dir_tweaking = !(list_only || solo_file || dry_run);
2170 need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2171 loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2172 symlink_timeset_failed_flags = ITEM_REPORT_TIME
2173 | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2174 implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2175
2176 if (DEBUG_GTE(GENR, 1))
2177 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2178
2179 if (delete_before && !solo_file && cur_flist->used > 0)
2180 do_delete_pass();
2181 if (delete_during == 2) {
2182 deldelay_size = BIGPATHBUFLEN * 4;
2183 deldelay_buf = new_array(char, deldelay_size);
2184 if (!deldelay_buf)
2185 out_of_memory("delete-delay");
2186 }
2187 info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2188
2189 if (append_mode > 0 || whole_file < 0)
2190 whole_file = 0;
2191 if (DEBUG_GTE(FLIST, 1)) {
2192 rprintf(FINFO, "delta-transmission %s\n",
2193 whole_file
2194 ? "disabled for local transfer or --whole-file"
2195 : "enabled");
2196 }
2197
2198 dflt_perms = (ACCESSPERMS & ~orig_umask);
2199
2200 do {
2201 #ifdef SUPPORT_HARD_LINKS
2202 if (preserve_hard_links && inc_recurse) {
2203 while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2204 wait_for_receiver();
2205 }
2206 #endif
2207
2208 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2209 struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2210 if (solo_file)
2211 strlcpy(fbuf, solo_file, sizeof fbuf);
2212 else
2213 f_name(fp, fbuf);
2214 ndx = cur_flist->ndx_start - 1;
2215 recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2216 if (delete_during && dry_run < 2 && !list_only
2217 && !(fp->flags & FLAG_MISSING_DIR)) {
2218 if (fp->flags & FLAG_CONTENT_DIR) {
2219 dev_t dirdev;
2220 if (one_file_system) {
2221 uint32 *devp = F_DIR_DEV_P(fp);
2222 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2223 } else
2224 dirdev = MAKEDEV(0, 0);
2225 delete_in_dir(fbuf, fp, &dirdev);
2226 } else
2227 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2228 }
2229 }
2230 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2231 struct file_struct *file = cur_flist->sorted[i];
2232
2233 if (!F_IS_ACTIVE(file))
2234 continue;
2235
2236 if (unsort_ndx)
2237 ndx = F_NDX(file);
2238 else
2239 ndx = i + cur_flist->ndx_start;
2240
2241 if (solo_file)
2242 strlcpy(fbuf, solo_file, sizeof fbuf);
2243 else
2244 f_name(file, fbuf);
2245 recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2246
2247 check_for_finished_files(itemizing, code, 0);
2248
2249 if (i + cur_flist->ndx_start >= next_loopchk) {
2250 if (allowed_lull)
2251 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2252 else
2253 maybe_flush_socket(0);
2254 next_loopchk += loopchk_limit;
2255 }
2256 }
2257
2258 if (!inc_recurse) {
2259 write_ndx(f_out, NDX_DONE);
2260 break;
2261 }
2262
2263 while (1) {
2264 check_for_finished_files(itemizing, code, 1);
2265 if (cur_flist->next || flist_eof)
2266 break;
2267 wait_for_receiver();
2268 }
2269 } while ((cur_flist = cur_flist->next) != NULL);
2270
2271 if (delete_during)
2272 delete_in_dir(NULL, NULL, &dev_zero);
2273 phase++;
2274 if (DEBUG_GTE(GENR, 1))
2275 rprintf(FINFO, "generate_files phase=%d\n", phase);
2276
2277 while (1) {
2278 check_for_finished_files(itemizing, code, 1);
2279 if (msgdone_cnt)
2280 break;
2281 wait_for_receiver();
2282 }
2283
2284 phase++;
2285 if (DEBUG_GTE(GENR, 1))
2286 rprintf(FINFO, "generate_files phase=%d\n", phase);
2287
2288 write_ndx(f_out, NDX_DONE);
2289
2290 /* Reduce round-trip lag-time for a useless delay-updates phase. */
2291 if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2292 write_ndx(f_out, NDX_DONE);
2293
2294 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2295 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2296 write_del_stats(f_out);
2297 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2298 write_ndx(f_out, NDX_DONE);
2299 }
2300
2301 /* Read MSG_DONE for the redo phase (and any prior messages). */
2302 while (1) {
2303 check_for_finished_files(itemizing, code, 0);
2304 if (msgdone_cnt > 1)
2305 break;
2306 wait_for_receiver();
2307 }
2308
2309 if (protocol_version >= 29) {
2310 phase++;
2311 if (DEBUG_GTE(GENR, 1))
2312 rprintf(FINFO, "generate_files phase=%d\n", phase);
2313 if (!EARLY_DELAY_DONE_MSG()) {
2314 write_ndx(f_out, NDX_DONE);
2315 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2316 write_ndx(f_out, NDX_DONE);
2317 }
2318 /* Read MSG_DONE for delay-updates phase & prior messages. */
2319 while (msgdone_cnt == 2)
2320 wait_for_receiver();
2321 }
2322
2323 info_levels[INFO_FLIST] = save_info_flist;
2324 info_levels[INFO_PROGRESS] = save_info_progress;
2325
2326 if (delete_during == 2)
2327 do_delayed_deletions(fbuf);
2328 if (delete_after && !solo_file && file_total > 0)
2329 do_delete_pass();
2330
2331 if (max_delete >= 0 && skipped_deletes) {
2332 rprintf(FWARNING,
2333 "Deletions stopped due to --max-delete limit (%d skipped)\n",
2334 skipped_deletes);
2335 io_error |= IOERR_DEL_LIMIT;
2336 }
2337
2338 if (protocol_version >= 31) {
2339 if (!EARLY_DELETE_DONE_MSG()) {
2340 if (INFO_GTE(STATS, 2) || read_batch)
2341 write_del_stats(f_out);
2342 write_ndx(f_out, NDX_DONE);
2343 }
2344
2345 /* Read MSG_DONE for late-delete phase & prior messages. */
2346 while (msgdone_cnt == 3)
2347 wait_for_receiver();
2348 }
2349
2350 if ((need_retouch_dir_perms || need_retouch_dir_times)
2351 && dir_tweaking && (!inc_recurse || delete_during == 2))
2352 touch_up_dirs(dir_flist, -1);
2353
2354 if (DEBUG_GTE(GENR, 1))
2355 rprintf(FINFO, "generate_files finished\n");
2356 }
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