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Get the g++ version to see if it is really clang.
[rsync.git] / generator.c
blob8f9d60359351b95b3e152d2f8d43d57ee4e5c2fc
1 /*
2 * Routines that are exclusive to the generator process.
3 *
4 * Copyright (C) 1996-2000 Andrew Tridgell
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2002 Martin Pool <mbp@samba.org>
7 * Copyright (C) 2003-2020 Wayne Davison
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, visit the http://fsf.org website.
21 */
22
23 #include "rsync.h"
24 #include "inums.h"
25 #include "ifuncs.h"
26
27 extern int dry_run;
28 extern int do_xfers;
29 extern int stdout_format_has_i;
30 extern int logfile_format_has_i;
31 extern int am_root;
32 extern int am_server;
33 extern int am_daemon;
34 extern int inc_recurse;
35 extern int relative_paths;
36 extern int implied_dirs;
37 extern int keep_dirlinks;
38 extern int preserve_acls;
39 extern int preserve_xattrs;
40 extern int preserve_links;
41 extern int preserve_devices;
42 extern int write_devices;
43 extern int preserve_specials;
44 extern int preserve_hard_links;
45 extern int preserve_executability;
46 extern int preserve_perms;
47 extern int preserve_times;
48 extern int delete_mode;
49 extern int delete_before;
50 extern int delete_during;
51 extern int delete_after;
52 extern int missing_args;
53 extern int msgdone_cnt;
54 extern int ignore_errors;
55 extern int remove_source_files;
56 extern int delay_updates;
57 extern int update_only;
58 extern int human_readable;
59 extern int ignore_existing;
60 extern int ignore_non_existing;
61 extern int want_xattr_optim;
62 extern int modify_window;
63 extern int inplace;
64 extern int append_mode;
65 extern int make_backups;
66 extern int csum_length;
67 extern int ignore_times;
68 extern int size_only;
69 extern OFF_T max_size;
70 extern OFF_T min_size;
71 extern int io_error;
72 extern int flist_eof;
73 extern int allowed_lull;
74 extern int sock_f_out;
75 extern int protocol_version;
76 extern int file_total;
77 extern int fuzzy_basis;
78 extern int always_checksum;
79 extern int flist_csum_len;
80 extern char *partial_dir;
81 extern int alt_dest_type;
82 extern int whole_file;
83 extern int list_only;
84 extern int read_batch;
85 extern int write_batch;
86 extern int safe_symlinks;
87 extern long block_size; /* "long" because popt can't set an int32. */
88 extern int unsort_ndx;
89 extern int max_delete;
90 extern int force_delete;
91 extern int one_file_system;
92 extern int skipped_deletes;
93 extern dev_t filesystem_dev;
94 extern mode_t orig_umask;
95 extern uid_t our_uid;
96 extern char *tmpdir;
97 extern char *basis_dir[MAX_BASIS_DIRS+1];
98 extern struct file_list *cur_flist, *first_flist, *dir_flist;
99 extern filter_rule_list filter_list, daemon_filter_list;
100
101 int maybe_ATTRS_REPORT = 0;
102 int maybe_ATTRS_ACCURATE_TIME = 0;
103
104 static dev_t dev_zero;
105 static int deldelay_size = 0, deldelay_cnt = 0;
106 static char *deldelay_buf = NULL;
107 static int deldelay_fd = -1;
108 static int loopchk_limit;
109 static int dir_tweaking;
110 static int symlink_timeset_failed_flags;
111 static int need_retouch_dir_times;
112 static int need_retouch_dir_perms;
113 static const char *solo_file = NULL;
114
115 enum nonregtype {
116 TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
117 };
118
119 /* Forward declarations. */
120 #ifdef SUPPORT_HARD_LINKS
121 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
122 enum logcode code, int f_out);
123 #endif
124
125 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
126 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
127
128 static int start_delete_delay_temp(void)
129 {
130 char fnametmp[MAXPATHLEN];
131 int save_dry_run = dry_run;
132
133 dry_run = 0;
134 if (!get_tmpname(fnametmp, "deldelay", False)
135 || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
136 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
137 inc_recurse ? "" : " -- switching to --delete-after");
138 delete_during = 0;
139 delete_after = !inc_recurse;
140 dry_run = save_dry_run;
141 return 0;
142 }
143 unlink(fnametmp);
144 dry_run = save_dry_run;
145 return 1;
146 }
147
148 static int flush_delete_delay(void)
149 {
150 if (deldelay_fd < 0 && !start_delete_delay_temp())
151 return 0;
152 if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
153 rsyserr(FERROR, errno, "flush of delete-delay buffer");
154 delete_during = 0;
155 delete_after = !inc_recurse;
156 close(deldelay_fd);
157 return 0;
158 }
159 deldelay_cnt = 0;
160 return 1;
161 }
162
163 static int remember_delete(struct file_struct *file, const char *fname, int flags)
164 {
165 int len;
166
167 if (deldelay_cnt == deldelay_size && !flush_delete_delay())
168 return 0;
169
170 if (flags & DEL_NO_UID_WRITE)
171 deldelay_buf[deldelay_cnt++] = '!';
172
173 while (1) {
174 len = snprintf(deldelay_buf + deldelay_cnt, deldelay_size - deldelay_cnt,
175 "%x %s%c", (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, "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 static struct hashtable *dev_tbl;
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 (!dev_tbl)
306 dev_tbl = hashtable_create(16, HT_KEY64);
307 if (file->flags & FLAG_TOP_DIR) {
308 hashtable_find(dev_tbl, *fs_dev+1, "");
309 filesystem_dev = *fs_dev;
310 } else if (filesystem_dev != *fs_dev) {
311 if (!hashtable_find(dev_tbl, *fs_dev+1, NULL))
312 return;
313 filesystem_dev = *fs_dev; /* it's a prior top-dir dev */
314 }
315 }
316
317 dirlist = get_dirlist(fbuf, dlen, 0);
318
319 /* If an item in dirlist is not found in flist, delete it
320 * from the filesystem. */
321 for (i = dirlist->used; i--; ) {
322 struct file_struct *fp = dirlist->files[i];
323 if (!F_IS_ACTIVE(fp))
324 continue;
325 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
326 if (INFO_GTE(MOUNT, 1))
327 rprintf(FINFO, "cannot delete mount point: %s\n",
328 f_name(fp, NULL));
329 continue;
330 }
331 /* Here we want to match regardless of file type. Replacement
332 * of a file with one of another type is handled separately by
333 * a delete_item call with a DEL_MAKE_ROOM flag. */
334 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
335 int flags = DEL_RECURSE;
336 if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
337 flags |= DEL_NO_UID_WRITE;
338 f_name(fp, delbuf);
339 if (delete_during == 2) {
340 if (!remember_delete(fp, delbuf, flags))
341 break;
342 } else
343 delete_item(delbuf, fp->mode, flags);
344 }
345 }
346
347 flist_free(dirlist);
348 }
349
350 /* This deletes any files on the receiving side that are not present on the
351 * sending side. This is used by --delete-before and --delete-after. */
352 static void do_delete_pass(void)
353 {
354 char fbuf[MAXPATHLEN];
355 STRUCT_STAT st;
356 int j;
357
358 /* dry_run is incremented when the destination doesn't exist yet. */
359 if (dry_run > 1 || list_only)
360 return;
361
362 for (j = 0; j < cur_flist->used; j++) {
363 struct file_struct *file = cur_flist->sorted[j];
364
365 if (!F_IS_ACTIVE(file))
366 continue;
367
368 f_name(file, fbuf);
369
370 if (!(file->flags & FLAG_CONTENT_DIR)) {
371 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
372 continue;
373 }
374
375 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
376 rprintf(FINFO, "deleting in %s\n", fbuf);
377
378 if (link_stat(fbuf, &st, keep_dirlinks) < 0
379 || !S_ISDIR(st.st_mode))
380 continue;
381
382 delete_in_dir(fbuf, file, &st.st_dev);
383 }
384 delete_in_dir(NULL, NULL, &dev_zero);
385
386 if (INFO_GTE(FLIST, 2) && !am_server)
387 rprintf(FINFO, " \r");
388 }
389
390 static inline int mtime_differs(STRUCT_STAT *stp, struct file_struct *file)
391 {
392 #ifdef ST_MTIME_NSEC
393 return !same_time(stp->st_mtime, stp->ST_MTIME_NSEC, file->modtime, F_MOD_NSEC_or_0(file));
394 #else
395 return !same_time(stp->st_mtime, 0, file->modtime, 0);
396 #endif
397 }
398
399 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
400 {
401 if (preserve_perms)
402 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
403
404 if (preserve_executability)
405 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
406
407 return 0;
408 }
409
410 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
411 {
412 if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
413 return 1;
414
415 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
416 return 1;
417
418 return 0;
419 }
420
421 #ifdef SUPPORT_ACLS
422 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
423 {
424 if (preserve_acls) {
425 if (!ACL_READY(*sxp))
426 get_acl(fname, sxp);
427 if (set_acl(NULL, file, sxp, file->mode))
428 return 1;
429 }
430
431 return 0;
432 }
433 #endif
434
435 #ifdef SUPPORT_XATTRS
436 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
437 {
438 if (preserve_xattrs) {
439 if (!XATTR_READY(*sxp))
440 get_xattr(fname, sxp);
441 if (xattr_diff(file, sxp, 0))
442 return 1;
443 }
444
445 return 0;
446 }
447 #endif
448
449 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
450 {
451 if (S_ISLNK(file->mode)) {
452 #ifdef CAN_SET_SYMLINK_TIMES
453 if (preserve_times & PRESERVE_LINK_TIMES && mtime_differs(&sxp->st, file))
454 return 0;
455 #endif
456 #ifdef CAN_CHMOD_SYMLINK
457 if (perms_differ(file, sxp))
458 return 0;
459 #endif
460 #ifdef CAN_CHOWN_SYMLINK
461 if (ownership_differs(file, sxp))
462 return 0;
463 #endif
464 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
465 if (acls_differ(fname, file, sxp))
466 return 0;
467 #endif
468 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
469 if (xattrs_differ(fname, file, sxp))
470 return 0;
471 #endif
472 } else {
473 if (preserve_times && mtime_differs(&sxp->st, file))
474 return 0;
475 if (perms_differ(file, sxp))
476 return 0;
477 if (ownership_differs(file, sxp))
478 return 0;
479 #ifdef SUPPORT_ACLS
480 if (acls_differ(fname, file, sxp))
481 return 0;
482 #endif
483 #ifdef SUPPORT_XATTRS
484 if (xattrs_differ(fname, file, sxp))
485 return 0;
486 #endif
487 }
488
489 return 1;
490 }
491
492 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
493 stat_x *sxp, int32 iflags, uchar fnamecmp_type,
494 const char *xname)
495 {
496 if (statret >= 0) { /* A from-dest-dir statret can == 1! */
497 int keep_time = !preserve_times ? 0
498 : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
499 : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
500 : 1;
501
502 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
503 iflags |= ITEM_REPORT_SIZE;
504 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
505 if (iflags & ITEM_LOCAL_CHANGE)
506 iflags |= symlink_timeset_failed_flags;
507 } else if (keep_time
508 ? mtime_differs(&sxp->st, file)
509 : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
510 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
511 iflags |= ITEM_REPORT_TIME;
512 if (atimes_ndx && !S_ISDIR(file->mode) && !S_ISLNK(file->mode)
513 && !same_time(F_ATIME(file), 0, sxp->st.st_atime, 0))
514 iflags |= ITEM_REPORT_ATIME;
515 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
516 if (S_ISLNK(file->mode)) {
517 ;
518 } else
519 #endif
520 if (preserve_perms) {
521 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
522 iflags |= ITEM_REPORT_PERMS;
523 } else if (preserve_executability
524 && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
525 iflags |= ITEM_REPORT_PERMS;
526 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
527 iflags |= ITEM_REPORT_OWNER;
528 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
529 iflags |= ITEM_REPORT_GROUP;
530 #ifdef SUPPORT_ACLS
531 if (preserve_acls && !S_ISLNK(file->mode)) {
532 if (!ACL_READY(*sxp))
533 get_acl(fnamecmp, sxp);
534 if (set_acl(NULL, file, sxp, file->mode))
535 iflags |= ITEM_REPORT_ACL;
536 }
537 #endif
538 #ifdef SUPPORT_XATTRS
539 if (preserve_xattrs) {
540 if (!XATTR_READY(*sxp))
541 get_xattr(fnamecmp, sxp);
542 if (xattr_diff(file, sxp, 1))
543 iflags |= ITEM_REPORT_XATTR;
544 }
545 #endif
546 } else {
547 #ifdef SUPPORT_XATTRS
548 if (preserve_xattrs && xattr_diff(file, NULL, 1))
549 iflags |= ITEM_REPORT_XATTR;
550 #endif
551 iflags |= ITEM_IS_NEW;
552 }
553
554 iflags &= 0xffff;
555 if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
556 || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
557 if (protocol_version >= 29) {
558 if (ndx >= 0)
559 write_ndx(sock_f_out, ndx);
560 write_shortint(sock_f_out, iflags);
561 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
562 write_byte(sock_f_out, fnamecmp_type);
563 if (iflags & ITEM_XNAME_FOLLOWS)
564 write_vstring(sock_f_out, xname, strlen(xname));
565 #ifdef SUPPORT_XATTRS
566 if (preserve_xattrs && do_xfers
567 && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
568 int fd = iflags & ITEM_REPORT_XATTR
569 && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
570 ? sock_f_out : -1;
571 send_xattr_request(NULL, file, fd);
572 }
573 #endif
574 } else if (ndx >= 0) {
575 enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
576 log_item(code, file, iflags, xname);
577 }
578 }
579 }
580
581
582 /* Perform our quick-check heuristic for determining if a file is unchanged. */
583 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
584 {
585 if (st->st_size != F_LENGTH(file))
586 return 0;
587
588 /* if always checksum is set then we use the checksum instead
589 of the file time to determine whether to sync */
590 if (always_checksum > 0 && S_ISREG(st->st_mode)) {
591 char sum[MAX_DIGEST_LEN];
592 file_checksum(fn, st, sum);
593 return memcmp(sum, F_SUM(file), flist_csum_len) == 0;
594 }
595
596 if (size_only > 0)
597 return 1;
598
599 if (ignore_times)
600 return 0;
601
602 return !mtime_differs(st, file);
603 }
604
605
606 /*
607 * set (initialize) the size entries in the per-file sum_struct
608 * calculating dynamic block and checksum sizes.
609 *
610 * This is only called from generate_and_send_sums() but is a separate
611 * function to encapsulate the logic.
612 *
613 * The block size is a rounded square root of file length.
614 *
615 * The checksum size is determined according to:
616 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
617 * provided by Donovan Baarda which gives a probability of rsync
618 * algorithm corrupting data and falling back using the whole md4
619 * checksums.
620 *
621 * This might be made one of several selectable heuristics.
622 */
623 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
624 {
625 int32 blength;
626 int s2length;
627 int64 l;
628
629 if (len < 0) {
630 /* The file length overflowed our int64 var, so we can't process this file. */
631 sum->count = -1; /* indicate overflow error */
632 return;
633 }
634
635 if (block_size)
636 blength = block_size;
637 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
638 blength = BLOCK_SIZE;
639 else {
640 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
641 int32 c;
642 int cnt;
643 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
644 if (c < 0 || c >= max_blength)
645 blength = max_blength;
646 else {
647 blength = 0;
648 do {
649 blength |= c;
650 if (len < (int64)blength * blength)
651 blength &= ~c;
652 c >>= 1;
653 } while (c >= 8); /* round to multiple of 8 */
654 blength = MAX(blength, BLOCK_SIZE);
655 }
656 }
657
658 if (protocol_version < 27) {
659 s2length = csum_length;
660 } else if (csum_length == SUM_LENGTH) {
661 s2length = SUM_LENGTH;
662 } else {
663 int32 c;
664 int b = BLOCKSUM_BIAS;
665 for (l = len; l >>= 1; b += 2) {}
666 for (c = blength; (c >>= 1) && b; b--) {}
667 /* add a bit, subtract rollsum, round up. */
668 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
669 s2length = MAX(s2length, csum_length);
670 s2length = MIN(s2length, SUM_LENGTH);
671 }
672
673 sum->flength = len;
674 sum->blength = blength;
675 sum->s2length = s2length;
676 sum->remainder = (int32)(len % blength);
677 sum->count = (int32)(l = (len / blength) + (sum->remainder != 0));
678
679 if ((int64)sum->count != l)
680 sum->count = -1;
681
682 if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
683 rprintf(FINFO,
684 "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
685 big_num(sum->count), (long)sum->remainder, (long)sum->blength,
686 sum->s2length, big_num(sum->flength));
687 }
688 }
689
690
691 /*
692 * Generate and send a stream of signatures/checksums that describe a buffer
693 *
694 * Generate approximately one checksum every block_len bytes.
695 */
696 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
697 {
698 int32 i;
699 struct map_struct *mapbuf;
700 struct sum_struct sum;
701 OFF_T offset = 0;
702
703 sum_sizes_sqroot(&sum, len);
704 if (sum.count < 0)
705 return -1;
706 write_sum_head(f_out, &sum);
707
708 if (append_mode > 0 && f_copy < 0)
709 return 0;
710
711 if (len > 0)
712 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
713 else
714 mapbuf = NULL;
715
716 for (i = 0; i < sum.count; i++) {
717 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
718 char *map = map_ptr(mapbuf, offset, n1);
719 char sum2[SUM_LENGTH];
720 uint32 sum1;
721
722 len -= n1;
723 offset += n1;
724
725 if (f_copy >= 0) {
726 full_write(f_copy, map, n1);
727 if (append_mode > 0)
728 continue;
729 }
730
731 sum1 = get_checksum1(map, n1);
732 get_checksum2(map, n1, sum2);
733
734 if (DEBUG_GTE(DELTASUM, 3)) {
735 rprintf(FINFO,
736 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
737 big_num(i), big_num(offset - n1), (long)n1,
738 (unsigned long)sum1);
739 }
740 write_int(f_out, sum1);
741 write_buf(f_out, sum2, sum.s2length);
742 }
743
744 if (mapbuf)
745 unmap_file(mapbuf);
746
747 return 0;
748 }
749
750
751 /* Try to find a filename in the same dir as "fname" with a similar name. */
752 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
753 {
754 int fname_len, fname_suf_len;
755 const char *fname_suf, *fname = file->basename;
756 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
757 int i, j;
758 struct file_struct *lowest_fp = NULL;
759
760 fname_len = strlen(fname);
761 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
762
763 /* Try to find an exact size+mtime match first. */
764 for (i = 0; i < fuzzy_basis; i++) {
765 struct file_list *dirlist = dirlist_array[i];
766
767 if (!dirlist)
768 continue;
769
770 for (j = 0; j < dirlist->used; j++) {
771 struct file_struct *fp = dirlist->files[j];
772
773 if (!F_IS_ACTIVE(fp))
774 continue;
775
776 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
777 continue;
778
779 if (F_LENGTH(fp) == F_LENGTH(file) && same_time(fp->modtime, 0, file->modtime, 0)) {
780 if (DEBUG_GTE(FUZZY, 2))
781 rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
782 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
783 return fp;
784 }
785
786 }
787 }
788
789 for (i = 0; i < fuzzy_basis; i++) {
790 struct file_list *dirlist = dirlist_array[i];
791
792 if (!dirlist)
793 continue;
794
795 for (j = 0; j < dirlist->used; j++) {
796 struct file_struct *fp = dirlist->files[j];
797 const char *suf, *name;
798 int len, suf_len;
799 uint32 dist;
800
801 if (!F_IS_ACTIVE(fp))
802 continue;
803
804 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
805 continue;
806
807 name = fp->basename;
808 len = strlen(name);
809 suf = find_filename_suffix(name, len, &suf_len);
810
811 dist = fuzzy_distance(name, len, fname, fname_len);
812 /* Add some extra weight to how well the suffixes match. */
813 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
814 if (DEBUG_GTE(FUZZY, 2)) {
815 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
816 f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
817 }
818 if (dist <= lowest_dist) {
819 lowest_dist = dist;
820 lowest_fp = fp;
821 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
822 }
823 }
824 }
825
826 return lowest_fp;
827 }
828
829 /* Copy a file found in our --copy-dest handling. */
830 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
831 {
832 char buf[MAXPATHLEN];
833 const char *copy_to, *partialptr;
834 int save_preserve_xattrs = preserve_xattrs;
835 int ok, fd_w;
836
837 if (inplace) {
838 /* Let copy_file open the destination in place. */
839 fd_w = -1;
840 copy_to = dest;
841 } else {
842 fd_w = open_tmpfile(buf, dest, file);
843 if (fd_w < 0)
844 return -1;
845 copy_to = buf;
846 }
847 cleanup_set(copy_to, NULL, NULL, -1, -1);
848 if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
849 if (INFO_GTE(COPY, 1)) {
850 rsyserr(FINFO, errno, "copy_file %s => %s",
851 full_fname(src), copy_to);
852 }
853 /* Try to clean up. */
854 unlink(copy_to);
855 cleanup_disable();
856 return -1;
857 }
858 partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
859 preserve_xattrs = 0; /* xattrs were copied with file */
860 ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
861 preserve_xattrs = save_preserve_xattrs;
862 cleanup_disable();
863 return ok ? 0 : -1;
864 }
865
866 /* This is only called for regular files. We return -2 if we've finished
867 * handling the file, -1 if no dest-linking occurred, or a non-negative
868 * value if we found an alternate basis file. If we're called with the
869 * find_exact_for_existing flag, the destination file already exists, so
870 * we only try to find an exact alt-dest match. In this case, the returns
871 * are only -2 & -1 (both as above). */
872 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
873 char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
874 int itemizing, enum logcode code)
875 {
876 STRUCT_STAT real_st = sxp->st;
877 int best_match = -1;
878 int match_level = 0;
879 int j = 0;
880
881 do {
882 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
883 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
884 continue;
885 if (match_level == 0) {
886 best_match = j;
887 match_level = 1;
888 }
889 if (!unchanged_file(cmpbuf, file, &sxp->st))
890 continue;
891 if (match_level == 1) {
892 best_match = j;
893 match_level = 2;
894 }
895 if (unchanged_attrs(cmpbuf, file, sxp)) {
896 best_match = j;
897 match_level = 3;
898 break;
899 }
900 free_stat_x(sxp);
901 } while (basis_dir[++j] != NULL);
902
903 if (!match_level)
904 goto got_nothing_for_ya;
905
906 if (j != best_match) {
907 j = best_match;
908 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
909 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
910 goto got_nothing_for_ya;
911 }
912
913 if (match_level == 3 && alt_dest_type != COPY_DEST) {
914 if (find_exact_for_existing) {
915 if (alt_dest_type == LINK_DEST && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
916 return -1;
917 if (do_unlink(fname) < 0 && errno != ENOENT)
918 goto got_nothing_for_ya;
919 }
920 #ifdef SUPPORT_HARD_LINKS
921 if (alt_dest_type == LINK_DEST) {
922 if (!hard_link_one(file, fname, cmpbuf, 1))
923 goto try_a_copy;
924 if (atimes_ndx)
925 set_file_attrs(fname, file, sxp, NULL, 0);
926 if (preserve_hard_links && F_IS_HLINKED(file))
927 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
928 if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
929 itemize(cmpbuf, file, ndx, 1, sxp,
930 ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
931 0, "");
932 }
933 } else
934 #endif
935 {
936 if (itemizing)
937 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
938 }
939 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
940 rprintf(FCLIENT, "%s is uptodate\n", fname);
941 return -2;
942 }
943
944 if (find_exact_for_existing)
945 goto got_nothing_for_ya;
946
947 if (match_level >= 2) {
948 #ifdef SUPPORT_HARD_LINKS
949 try_a_copy: /* Copy the file locally. */
950 #endif
951 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
952 if (find_exact_for_existing) /* Can get here via hard-link failure */
953 goto got_nothing_for_ya;
954 return -1;
955 }
956 if (itemizing)
957 itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
958 if (maybe_ATTRS_REPORT
959 && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
960 || (INFO_GTE(NAME, 2) && match_level == 3))) {
961 code = match_level == 3 ? FCLIENT : FINFO;
962 rprintf(code, "%s%s\n", fname,
963 match_level == 3 ? " is uptodate" : "");
964 }
965 #ifdef SUPPORT_HARD_LINKS
966 if (preserve_hard_links && F_IS_HLINKED(file))
967 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
968 #endif
969 return -2;
970 }
971
972 return FNAMECMP_BASIS_DIR_LOW + j;
973
974 got_nothing_for_ya:
975 sxp->st = real_st;
976 return -1;
977 }
978
979 /* This is only called for non-regular files. We return -2 if we've finished
980 * handling the file, or -1 if no dest-linking occurred, or a non-negative
981 * value if we found an alternate basis file. */
982 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
983 char *cmpbuf, stat_x *sxp, int itemizing,
984 enum logcode code)
985 {
986 int best_match = -1;
987 int match_level = 0;
988 enum nonregtype type;
989 uint32 *devp;
990 #ifdef SUPPORT_LINKS
991 char lnk[MAXPATHLEN];
992 int len;
993 #endif
994 int j = 0;
995
996 #ifndef SUPPORT_LINKS
997 if (S_ISLNK(file->mode))
998 return -1;
999 #endif
1000 if (S_ISDIR(file->mode)) {
1001 type = TYPE_DIR;
1002 } else if (IS_SPECIAL(file->mode))
1003 type = TYPE_SPECIAL;
1004 else if (IS_DEVICE(file->mode))
1005 type = TYPE_DEVICE;
1006 #ifdef SUPPORT_LINKS
1007 else if (S_ISLNK(file->mode))
1008 type = TYPE_SYMLINK;
1009 #endif
1010 else {
1011 rprintf(FERROR,
1012 "internal: try_dests_non() called with invalid mode (%o)\n",
1013 (int)file->mode);
1014 exit_cleanup(RERR_UNSUPPORTED);
1015 }
1016
1017 do {
1018 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1019 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1020 continue;
1021 switch (type) {
1022 case TYPE_DIR:
1023 if (!S_ISDIR(sxp->st.st_mode))
1024 continue;
1025 break;
1026 case TYPE_SPECIAL:
1027 if (!IS_SPECIAL(sxp->st.st_mode))
1028 continue;
1029 break;
1030 case TYPE_DEVICE:
1031 if (!IS_DEVICE(sxp->st.st_mode))
1032 continue;
1033 break;
1034 case TYPE_SYMLINK:
1035 #ifdef SUPPORT_LINKS
1036 if (!S_ISLNK(sxp->st.st_mode))
1037 continue;
1038 break;
1039 #else
1040 return -1;
1041 #endif
1042 }
1043 if (match_level < 1) {
1044 match_level = 1;
1045 best_match = j;
1046 }
1047 switch (type) {
1048 case TYPE_DIR:
1049 case TYPE_SPECIAL:
1050 break;
1051 case TYPE_DEVICE:
1052 devp = F_RDEV_P(file);
1053 if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1054 continue;
1055 break;
1056 case TYPE_SYMLINK:
1057 #ifdef SUPPORT_LINKS
1058 if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1059 continue;
1060 lnk[len] = '\0';
1061 if (strcmp(lnk, F_SYMLINK(file)) != 0)
1062 continue;
1063 break;
1064 #else
1065 return -1;
1066 #endif
1067 }
1068 if (match_level < 2) {
1069 match_level = 2;
1070 best_match = j;
1071 }
1072 if (unchanged_attrs(cmpbuf, file, sxp)) {
1073 match_level = 3;
1074 best_match = j;
1075 break;
1076 }
1077 } while (basis_dir[++j] != NULL);
1078
1079 if (!match_level)
1080 return -1;
1081
1082 if (j != best_match) {
1083 j = best_match;
1084 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1085 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1086 return -1;
1087 }
1088
1089 if (match_level == 3) {
1090 #ifdef SUPPORT_HARD_LINKS
1091 if (alt_dest_type == LINK_DEST
1092 #ifndef CAN_HARDLINK_SYMLINK
1093 && !S_ISLNK(file->mode)
1094 #endif
1095 #ifndef CAN_HARDLINK_SPECIAL
1096 && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1097 #endif
1098 && !S_ISDIR(file->mode)) {
1099 if (do_link(cmpbuf, fname) < 0) {
1100 rsyserr(FERROR_XFER, errno,
1101 "failed to hard-link %s with %s",
1102 cmpbuf, fname);
1103 return j;
1104 }
1105 if (preserve_hard_links && F_IS_HLINKED(file))
1106 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1107 } else
1108 #endif
1109 match_level = 2;
1110 if (itemizing && stdout_format_has_i
1111 && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1112 int chg = alt_dest_type == COMPARE_DEST && type != TYPE_DIR ? 0
1113 : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1114 char *lp = match_level == 3 ? "" : NULL;
1115 itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1116 }
1117 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1118 rprintf(FCLIENT, "%s%s is uptodate\n",
1119 fname, type == TYPE_DIR ? "/" : "");
1120 }
1121 return -2;
1122 }
1123
1124 return j;
1125 }
1126
1127 static void list_file_entry(struct file_struct *f)
1128 {
1129 char permbuf[PERMSTRING_SIZE];
1130 const char *mtime_str = timestring(f->modtime);
1131 int size_width = human_readable ? 14 : 11;
1132 int mtime_width = 1 + strlen(mtime_str);
1133 int atime_width = atimes_ndx ? mtime_width : 0;
1134
1135 if (!F_IS_ACTIVE(f)) {
1136 /* this can happen if duplicate names were removed */
1137 return;
1138 }
1139
1140 /* TODO: indicate '+' if the entry has an ACL. */
1141
1142 if (missing_args == 2 && f->mode == 0) {
1143 rprintf(FINFO, "%-*s %s\n",
1144 10 + 1 + size_width + mtime_width + atime_width, "*missing",
1145 f_name(f, NULL));
1146 } else {
1147 const char *atime_str = atimes_ndx && !S_ISDIR(f->mode) ? timestring(F_ATIME(f)) : "";
1148 const char *arrow, *lnk;
1149
1150 permstring(permbuf, f->mode);
1151
1152 #ifdef SUPPORT_LINKS
1153 if (preserve_links && S_ISLNK(f->mode)) {
1154 arrow = " -> ";
1155 lnk = F_SYMLINK(f);
1156 } else
1157 #endif
1158 arrow = lnk = "";
1159
1160 rprintf(FINFO, "%s %*s %s%*s %s%s%s\n",
1161 permbuf, size_width, human_num(F_LENGTH(f)),
1162 timestring(f->modtime), atime_width, atime_str,
1163 f_name(f, NULL), arrow, lnk);
1164 }
1165 }
1166
1167 static int phase = 0;
1168 static int dflt_perms;
1169
1170 static int implied_dirs_are_missing;
1171 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1172 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1173 {
1174 return F_DEPTH(file) > F_DEPTH(subtree)
1175 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1176 }
1177
1178 /* Acts on the indicated item in cur_flist whose name is fname. If a dir,
1179 * make sure it exists, and has the right permissions/timestamp info. For
1180 * all other non-regular files (symlinks, etc.) we create them here. For
1181 * regular files that have changed, we try to find a basis file and then
1182 * start sending checksums. The ndx is the file's unique index value.
1183 *
1184 * The fname parameter must point to a MAXPATHLEN buffer! (e.g it gets
1185 * passed to delete_item(), which can use it during a recursive delete.)
1186 *
1187 * Note that f_out is set to -1 when doing final directory-permission and
1188 * modification-time repair. */
1189 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1190 int itemizing, enum logcode code, int f_out)
1191 {
1192 static const char *parent_dirname = "";
1193 static struct file_struct *prior_dir_file = NULL;
1194 /* Missing dir not created due to --dry-run; will still be scanned. */
1195 static struct file_struct *dry_missing_dir = NULL;
1196 /* Missing dir whose contents are skipped altogether due to
1197 * --ignore-non-existing, daemon exclude, or mkdir failure. */
1198 static struct file_struct *skip_dir = NULL;
1199 static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1200 static int need_fuzzy_dirlist = 0;
1201 struct file_struct *fuzzy_file = NULL;
1202 int fd = -1, f_copy = -1;
1203 stat_x sx, real_sx;
1204 STRUCT_STAT partial_st;
1205 struct file_struct *back_file = NULL;
1206 int statret, real_ret, stat_errno;
1207 char *fnamecmp, *partialptr, *backupptr = NULL;
1208 char fnamecmpbuf[MAXPATHLEN];
1209 uchar fnamecmp_type;
1210 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1211 int is_dir = !S_ISDIR(file->mode) ? 0
1212 : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1213 : 1;
1214
1215 if (DEBUG_GTE(GENR, 1))
1216 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1217
1218 if (list_only) {
1219 if (is_dir < 0
1220 || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1221 return;
1222 list_file_entry(file);
1223 return;
1224 }
1225
1226 maybe_ATTRS_ACCURATE_TIME = always_checksum ? ATTRS_ACCURATE_TIME : 0;
1227
1228 if (skip_dir) {
1229 if (is_below(file, skip_dir)) {
1230 if (is_dir)
1231 file->flags |= FLAG_MISSING_DIR;
1232 #ifdef SUPPORT_HARD_LINKS
1233 else if (F_IS_HLINKED(file))
1234 handle_skipped_hlink(file, itemizing, code, f_out);
1235 #endif
1236 return;
1237 }
1238 skip_dir = NULL;
1239 }
1240
1241 init_stat_x(&sx);
1242 if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1243 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1244 if (is_dir < 0)
1245 return;
1246 #ifdef SUPPORT_HARD_LINKS
1247 if (F_IS_HLINKED(file))
1248 handle_skipped_hlink(file, itemizing, code, f_out);
1249 #endif
1250 rprintf(FERROR_XFER,
1251 "ERROR: daemon refused to receive %s \"%s\"\n",
1252 is_dir ? "directory" : "file", fname);
1253 if (is_dir)
1254 goto skipping_dir_contents;
1255 return;
1256 }
1257 }
1258
1259 if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1260 int i;
1261 parent_is_dry_missing:
1262 for (i = 0; i < fuzzy_basis; i++) {
1263 if (fuzzy_dirlist[i]) {
1264 flist_free(fuzzy_dirlist[i]);
1265 fuzzy_dirlist[i] = NULL;
1266 }
1267 }
1268 parent_dirname = "";
1269 statret = -1;
1270 stat_errno = ENOENT;
1271 } else {
1272 const char *dn = file->dirname ? file->dirname : ".";
1273 dry_missing_dir = NULL;
1274 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1275 /* Each parent dir must be in the file list or the flist data is bad.
1276 * Optimization: most of the time the parent dir will be the last dir
1277 * this function was asked to process in the file list. */
1278 if (!inc_recurse
1279 && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
1280 && (!prior_dir_file || strcmp(dn, f_name(prior_dir_file, NULL)) != 0)
1281 && flist_find_name(cur_flist, dn, 1) < 0) {
1282 /* The --delete-missing-args option can actually put invalid entries into
1283 * the file list, so if that option was specified, we'll just complain about
1284 * it and allow it. */
1285 if (missing_args == 2 && file->mode == 0)
1286 rprintf(FERROR, "WARNING: parent dir is absent in the file list: %s\n", dn);
1287 else {
1288 rprintf(FERROR, "ABORTING due to invalid path from sender: %s/%s\n",
1289 dn, file->basename);
1290 exit_cleanup(RERR_PROTOCOL);
1291 }
1292 }
1293 if (relative_paths && !implied_dirs
1294 && do_stat(dn, &sx.st) < 0) {
1295 if (dry_run)
1296 goto parent_is_dry_missing;
1297 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1298 rsyserr(FERROR_XFER, errno,
1299 "recv_generator: mkdir %s failed",
1300 full_fname(dn));
1301 }
1302 }
1303 if (fuzzy_basis) {
1304 int i;
1305 for (i = 0; i < fuzzy_basis; i++) {
1306 if (fuzzy_dirlist[i]) {
1307 flist_free(fuzzy_dirlist[i]);
1308 fuzzy_dirlist[i] = NULL;
1309 }
1310 }
1311 need_fuzzy_dirlist = 1;
1312 }
1313 #ifdef SUPPORT_ACLS
1314 if (!preserve_perms)
1315 dflt_perms = default_perms_for_dir(dn);
1316 #endif
1317 }
1318 parent_dirname = dn;
1319
1320 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1321 stat_errno = errno;
1322 }
1323
1324 if (missing_args == 2 && file->mode == 0) {
1325 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1326 return;
1327 if (statret == 0)
1328 delete_item(fname, sx.st.st_mode, del_opts);
1329 return;
1330 }
1331
1332 if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1333 if (is_dir) {
1334 if (is_dir < 0)
1335 return;
1336 skip_dir = file;
1337 file->flags |= FLAG_MISSING_DIR;
1338 }
1339 #ifdef SUPPORT_HARD_LINKS
1340 else if (F_IS_HLINKED(file))
1341 handle_skipped_hlink(file, itemizing, code, f_out);
1342 #endif
1343 if (INFO_GTE(SKIP, 1)) {
1344 rprintf(FINFO, "not creating new %s \"%s\"\n",
1345 is_dir ? "directory" : "file", fname);
1346 }
1347 return;
1348 }
1349
1350 if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1351 && !am_root && sx.st.st_uid == our_uid)
1352 del_opts |= DEL_NO_UID_WRITE;
1353
1354 if (ignore_existing > 0 && statret == 0
1355 && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1356 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1357 rprintf(FINFO, "%s exists\n", fname);
1358 #ifdef SUPPORT_HARD_LINKS
1359 if (F_IS_HLINKED(file))
1360 handle_skipped_hlink(file, itemizing, code, f_out);
1361 #endif
1362 goto cleanup;
1363 }
1364
1365 fnamecmp = fname;
1366
1367 if (is_dir) {
1368 mode_t added_perms;
1369 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1370 goto cleanup;
1371 if (am_root < 0) {
1372 /* For --fake-super, the dir must be useable by the copying
1373 * user, just like it would be for root. */
1374 added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1375 } else
1376 added_perms = 0;
1377 if (is_dir < 0) {
1378 if (!(preserve_times & PRESERVE_DIR_TIMES))
1379 goto cleanup;
1380 /* In inc_recurse mode we want to make sure any missing
1381 * directories get created while we're still processing
1382 * the parent dir (which allows us to touch the parent
1383 * dir's mtime right away). We will handle the dir in
1384 * full later (right before we handle its contents). */
1385 if (statret == 0
1386 && (S_ISDIR(sx.st.st_mode)
1387 || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1388 goto cleanup; /* Any errors get reported later. */
1389 if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1390 file->flags |= FLAG_DIR_CREATED;
1391 goto cleanup;
1392 }
1393 /* The file to be received is a directory, so we need
1394 * to prepare appropriately. If there is already a
1395 * file of that name and it is *not* a directory, then
1396 * we need to delete it. If it doesn't exist, then
1397 * (perhaps recursively) create it. */
1398 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1399 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1400 goto skipping_dir_contents;
1401 statret = -1;
1402 }
1403 if (dry_run && statret != 0) {
1404 if (!dry_missing_dir)
1405 dry_missing_dir = file;
1406 file->flags |= FLAG_MISSING_DIR;
1407 }
1408 init_stat_x(&real_sx);
1409 real_sx.st = sx.st;
1410 real_ret = statret;
1411 if (file->flags & FLAG_DIR_CREATED)
1412 statret = -1;
1413 if (!preserve_perms) { /* See comment in non-dir code below. */
1414 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, statret == 0);
1415 }
1416 if (statret != 0 && basis_dir[0] != NULL) {
1417 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1418 if (j == -2) {
1419 itemizing = 0;
1420 code = FNONE;
1421 statret = 1;
1422 } else if (j >= 0) {
1423 statret = 1;
1424 fnamecmp = fnamecmpbuf;
1425 }
1426 }
1427 if (itemizing && f_out != -1) {
1428 itemize(fnamecmp, file, ndx, statret, &sx,
1429 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1430 }
1431 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1432 if (!relative_paths || errno != ENOENT
1433 || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1434 || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1435 rsyserr(FERROR_XFER, errno,
1436 "recv_generator: mkdir %s failed",
1437 full_fname(fname));
1438 skipping_dir_contents:
1439 rprintf(FERROR, "*** Skipping any contents from this failed directory ***\n");
1440 skip_dir = file;
1441 file->flags |= FLAG_MISSING_DIR;
1442 goto cleanup;
1443 }
1444 }
1445
1446 #ifdef SUPPORT_XATTRS
1447 if (preserve_xattrs && statret == 1)
1448 copy_xattrs(fnamecmpbuf, fname);
1449 #endif
1450 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1451 && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1452 rprintf(code, "%s/\n", fname);
1453
1454 /* We need to ensure that the dirs in the transfer have both
1455 * readable and writable permissions during the time we are
1456 * putting files within them. This is then restored to the
1457 * former permissions after the transfer is done. */
1458 #ifdef HAVE_CHMOD
1459 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1460 mode_t mode = file->mode | S_IRWXU;
1461 if (do_chmod(fname, mode) < 0) {
1462 rsyserr(FERROR_XFER, errno,
1463 "failed to modify permissions on %s",
1464 full_fname(fname));
1465 }
1466 need_retouch_dir_perms = 1;
1467 }
1468 #endif
1469
1470 if (real_ret != 0 && one_file_system)
1471 real_sx.st.st_dev = filesystem_dev;
1472 if (inc_recurse) {
1473 if (one_file_system) {
1474 uint32 *devp = F_DIR_DEV_P(file);
1475 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1476 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1477 }
1478 }
1479 else if (delete_during && f_out != -1 && !phase
1480 && !(file->flags & FLAG_MISSING_DIR)) {
1481 if (file->flags & FLAG_CONTENT_DIR)
1482 delete_in_dir(fname, file, &real_sx.st.st_dev);
1483 else
1484 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1485 }
1486 prior_dir_file = file;
1487 goto cleanup;
1488 }
1489
1490 /* If we're not preserving permissions, change the file-list's
1491 * mode based on the local permissions and some heuristics. */
1492 if (!preserve_perms) {
1493 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1494 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, exists);
1495 }
1496
1497 #ifdef SUPPORT_HARD_LINKS
1498 if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1499 && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1500 goto cleanup;
1501 #endif
1502
1503 if (preserve_links && S_ISLNK(file->mode)) {
1504 #ifdef SUPPORT_LINKS
1505 const char *sl = F_SYMLINK(file);
1506 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1507 if (INFO_GTE(NAME, 1)) {
1508 if (solo_file) {
1509 /* fname contains the destination path, but we
1510 * want to report the source path. */
1511 fname = f_name(file, NULL);
1512 }
1513 rprintf(FINFO,
1514 "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1515 fname, sl);
1516 }
1517 goto cleanup;
1518 }
1519 if (statret == 0) {
1520 char lnk[MAXPATHLEN];
1521 int len;
1522
1523 if (S_ISLNK(sx.st.st_mode)
1524 && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1525 && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1526 /* The link is pointing to the right place. */
1527 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1528 if (itemizing)
1529 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1530 #ifdef SUPPORT_HARD_LINKS
1531 if (preserve_hard_links && F_IS_HLINKED(file))
1532 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1533 #endif
1534 if (remove_source_files == 1)
1535 goto return_with_success;
1536 goto cleanup;
1537 }
1538 } else if (basis_dir[0] != NULL) {
1539 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1540 if (j == -2) {
1541 #ifndef CAN_HARDLINK_SYMLINK
1542 if (alt_dest_type == LINK_DEST) {
1543 /* Resort to --copy-dest behavior. */
1544 } else
1545 #endif
1546 if (alt_dest_type != COPY_DEST)
1547 goto cleanup;
1548 itemizing = 0;
1549 code = FNONE;
1550 } else if (j >= 0) {
1551 statret = 1;
1552 fnamecmp = fnamecmpbuf;
1553 }
1554 }
1555 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1556 set_file_attrs(fname, file, NULL, NULL, 0);
1557 if (itemizing) {
1558 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1559 statret = -1;
1560 itemize(fnamecmp, file, ndx, statret, &sx,
1561 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1562 }
1563 if (code != FNONE && INFO_GTE(NAME, 1))
1564 rprintf(code, "%s -> %s\n", fname, sl);
1565 #ifdef SUPPORT_HARD_LINKS
1566 if (preserve_hard_links && F_IS_HLINKED(file))
1567 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1568 #endif
1569 /* This does not check remove_source_files == 1
1570 * because this is one of the items that the old
1571 * --remove-sent-files option would remove. */
1572 if (remove_source_files)
1573 goto return_with_success;
1574 }
1575 #endif
1576 goto cleanup;
1577 }
1578
1579 if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1580 || (preserve_specials && IS_SPECIAL(file->mode))) {
1581 dev_t rdev;
1582 int del_for_flag = 0;
1583 if (IS_DEVICE(file->mode)) {
1584 uint32 *devp = F_RDEV_P(file);
1585 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1586 } else
1587 rdev = 0;
1588 if (statret == 0) {
1589 if (IS_DEVICE(file->mode)) {
1590 if (!IS_DEVICE(sx.st.st_mode))
1591 statret = -1;
1592 del_for_flag = DEL_FOR_DEVICE;
1593 } else {
1594 if (!IS_SPECIAL(sx.st.st_mode))
1595 statret = -1;
1596 del_for_flag = DEL_FOR_SPECIAL;
1597 }
1598 if (statret == 0
1599 && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1600 && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1601 /* The device or special file is identical. */
1602 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1603 if (itemizing)
1604 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1605 #ifdef SUPPORT_HARD_LINKS
1606 if (preserve_hard_links && F_IS_HLINKED(file))
1607 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1608 #endif
1609 if (remove_source_files == 1)
1610 goto return_with_success;
1611 goto cleanup;
1612 }
1613 } else if (basis_dir[0] != NULL) {
1614 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1615 if (j == -2) {
1616 #ifndef CAN_HARDLINK_SPECIAL
1617 if (alt_dest_type == LINK_DEST) {
1618 /* Resort to --copy-dest behavior. */
1619 } else
1620 #endif
1621 if (alt_dest_type != COPY_DEST)
1622 goto cleanup;
1623 itemizing = 0;
1624 code = FNONE;
1625 } else if (j >= 0) {
1626 statret = 1;
1627 fnamecmp = fnamecmpbuf;
1628 }
1629 }
1630 if (DEBUG_GTE(GENR, 1)) {
1631 rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1632 fname, (int)file->mode,
1633 (long)major(rdev), (long)minor(rdev));
1634 }
1635 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1636 set_file_attrs(fname, file, NULL, NULL, 0);
1637 if (itemizing) {
1638 itemize(fnamecmp, file, ndx, statret, &sx,
1639 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1640 }
1641 if (code != FNONE && INFO_GTE(NAME, 1))
1642 rprintf(code, "%s\n", fname);
1643 #ifdef SUPPORT_HARD_LINKS
1644 if (preserve_hard_links && F_IS_HLINKED(file))
1645 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1646 #endif
1647 if (remove_source_files == 1)
1648 goto return_with_success;
1649 }
1650 goto cleanup;
1651 }
1652
1653 if (!S_ISREG(file->mode)) {
1654 if (solo_file)
1655 fname = f_name(file, NULL);
1656 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1657 goto cleanup;
1658 }
1659
1660 if (max_size >= 0 && F_LENGTH(file) > max_size) {
1661 if (INFO_GTE(SKIP, 1)) {
1662 if (solo_file)
1663 fname = f_name(file, NULL);
1664 rprintf(FINFO, "%s is over max-size\n", fname);
1665 }
1666 goto cleanup;
1667 }
1668 if (min_size >= 0 && F_LENGTH(file) < min_size) {
1669 if (INFO_GTE(SKIP, 1)) {
1670 if (solo_file)
1671 fname = f_name(file, NULL);
1672 rprintf(FINFO, "%s is under min-size\n", fname);
1673 }
1674 goto cleanup;
1675 }
1676
1677 if (update_only > 0 && statret == 0 && file->modtime - sx.st.st_mtime <= modify_window) {
1678 if (INFO_GTE(SKIP, 1))
1679 rprintf(FINFO, "%s is newer\n", fname);
1680 #ifdef SUPPORT_HARD_LINKS
1681 if (F_IS_HLINKED(file))
1682 handle_skipped_hlink(file, itemizing, code, f_out);
1683 #endif
1684 goto cleanup;
1685 }
1686
1687 fnamecmp_type = FNAMECMP_FNAME;
1688
1689 if (statret == 0 && !(S_ISREG(sx.st.st_mode) || (write_devices && IS_DEVICE(sx.st.st_mode)))) {
1690 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1691 goto cleanup;
1692 statret = -1;
1693 stat_errno = ENOENT;
1694 }
1695
1696 if (basis_dir[0] != NULL && (statret != 0 || alt_dest_type != COPY_DEST)) {
1697 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx, statret == 0, itemizing, code);
1698 if (j == -2) {
1699 if (remove_source_files == 1)
1700 goto return_with_success;
1701 goto cleanup;
1702 }
1703 if (j >= 0) {
1704 fnamecmp = fnamecmpbuf;
1705 fnamecmp_type = j;
1706 statret = 0;
1707 }
1708 }
1709
1710 init_stat_x(&real_sx);
1711 real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1712 real_ret = statret;
1713
1714 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1715 && link_stat(partialptr, &partial_st, 0) == 0
1716 && S_ISREG(partial_st.st_mode)) {
1717 if (statret != 0)
1718 goto prepare_to_open;
1719 } else
1720 partialptr = NULL;
1721
1722 if (statret != 0 && fuzzy_basis) {
1723 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1724 const char *dn = file->dirname ? file->dirname : ".";
1725 int i;
1726 strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1727 for (i = 0; i < fuzzy_basis; i++) {
1728 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1729 continue;
1730 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES | GDL_PERHAPS_DIR);
1731 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1732 flist_free(fuzzy_dirlist[i]);
1733 fuzzy_dirlist[i] = NULL;
1734 }
1735 }
1736 need_fuzzy_dirlist = 0;
1737 }
1738
1739 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1740 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1741 if (fuzzy_file) {
1742 f_name(fuzzy_file, fnamecmpbuf);
1743 if (DEBUG_GTE(FUZZY, 1)) {
1744 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1745 fname, fnamecmpbuf);
1746 }
1747 sx.st.st_size = F_LENGTH(fuzzy_file);
1748 statret = 0;
1749 fnamecmp = fnamecmpbuf;
1750 }
1751 }
1752
1753 if (statret != 0) {
1754 #ifdef SUPPORT_HARD_LINKS
1755 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1756 cur_flist->in_progress++;
1757 goto cleanup;
1758 }
1759 #endif
1760 if (stat_errno == ENOENT)
1761 goto notify_others;
1762 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1763 full_fname(fname));
1764 goto cleanup;
1765 }
1766
1767 if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1768 ;
1769 else if (fnamecmp_type >= FNAMECMP_FUZZY)
1770 ;
1771 else if (unchanged_file(fnamecmp, file, &sx.st)) {
1772 if (partialptr) {
1773 do_unlink(partialptr);
1774 handle_partial_dir(partialptr, PDIR_DELETE);
1775 }
1776 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT | maybe_ATTRS_ACCURATE_TIME);
1777 if (itemizing)
1778 itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1779 #ifdef SUPPORT_HARD_LINKS
1780 if (preserve_hard_links && F_IS_HLINKED(file))
1781 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1782 #endif
1783 if (remove_source_files != 1)
1784 goto cleanup;
1785 return_with_success:
1786 if (!dry_run)
1787 send_msg_int(MSG_SUCCESS, ndx);
1788 goto cleanup;
1789 }
1790
1791 if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1792 #ifdef SUPPORT_HARD_LINKS
1793 if (F_IS_HLINKED(file))
1794 handle_skipped_hlink(file, itemizing, code, f_out);
1795 #endif
1796 goto cleanup;
1797 }
1798
1799 prepare_to_open:
1800 if (partialptr) {
1801 sx.st = partial_st;
1802 fnamecmp = partialptr;
1803 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1804 statret = 0;
1805 }
1806
1807 if (!do_xfers)
1808 goto notify_others;
1809
1810 if (read_batch || whole_file) {
1811 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1812 if (!(backupptr = get_backup_name(fname)))
1813 goto cleanup;
1814 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1815 goto pretend_missing;
1816 if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1817 unmake_file(back_file);
1818 back_file = NULL;
1819 goto cleanup;
1820 }
1821 }
1822 goto notify_others;
1823 }
1824
1825 if (fuzzy_dirlist[0]) {
1826 int j = flist_find(fuzzy_dirlist[0], file);
1827 if (j >= 0) /* don't use changing file as future fuzzy basis */
1828 fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1829 }
1830
1831 /* open the file */
1832 if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1833 rsyserr(FERROR, errno, "failed to open %s, continuing",
1834 full_fname(fnamecmp));
1835 pretend_missing:
1836 /* pretend the file didn't exist */
1837 #ifdef SUPPORT_HARD_LINKS
1838 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1839 cur_flist->in_progress++;
1840 goto cleanup;
1841 }
1842 #endif
1843 statret = real_ret = -1;
1844 goto notify_others;
1845 }
1846
1847 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1848 if (!(backupptr = get_backup_name(fname))) {
1849 close(fd);
1850 goto cleanup;
1851 }
1852 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1853 close(fd);
1854 goto pretend_missing;
1855 }
1856 if (robust_unlink(backupptr) && errno != ENOENT) {
1857 rsyserr(FERROR_XFER, errno, "unlink %s",
1858 full_fname(backupptr));
1859 unmake_file(back_file);
1860 back_file = NULL;
1861 close(fd);
1862 goto cleanup;
1863 }
1864 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1865 rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1866 unmake_file(back_file);
1867 back_file = NULL;
1868 close(fd);
1869 goto cleanup;
1870 }
1871 fnamecmp_type = FNAMECMP_BACKUP;
1872 }
1873
1874 if (DEBUG_GTE(DELTASUM, 3)) {
1875 rprintf(FINFO, "gen mapped %s of size %s\n",
1876 fnamecmp, big_num(sx.st.st_size));
1877 }
1878
1879 if (DEBUG_GTE(DELTASUM, 2))
1880 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1881
1882 notify_others:
1883 if (remove_source_files && !delay_updates && !phase && !dry_run)
1884 increment_active_files(ndx, itemizing, code);
1885 if (inc_recurse && (!dry_run || write_batch < 0))
1886 cur_flist->in_progress++;
1887 #ifdef SUPPORT_HARD_LINKS
1888 if (preserve_hard_links && F_IS_HLINKED(file))
1889 file->flags |= FLAG_FILE_SENT;
1890 #endif
1891 write_ndx(f_out, ndx);
1892 if (itemizing) {
1893 int iflags = ITEM_TRANSFER;
1894 if (always_checksum > 0)
1895 iflags |= ITEM_REPORT_CHANGE;
1896 if (fnamecmp_type != FNAMECMP_FNAME)
1897 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1898 if (fnamecmp_type >= FNAMECMP_FUZZY)
1899 iflags |= ITEM_XNAME_FOLLOWS;
1900 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1901 fuzzy_file ? fuzzy_file->basename : NULL);
1902 free_stat_x(&real_sx);
1903 }
1904
1905 if (!do_xfers) {
1906 #ifdef SUPPORT_HARD_LINKS
1907 if (preserve_hard_links && F_IS_HLINKED(file))
1908 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1909 #endif
1910 goto cleanup;
1911 }
1912 if (read_batch)
1913 goto cleanup;
1914
1915 if (statret != 0 || whole_file)
1916 write_sum_head(f_out, NULL);
1917 else if (sx.st.st_size <= 0) {
1918 write_sum_head(f_out, NULL);
1919 close(fd);
1920 } else {
1921 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1922 rprintf(FWARNING,
1923 "WARNING: file is too large for checksum sending: %s\n",
1924 fnamecmp);
1925 write_sum_head(f_out, NULL);
1926 }
1927 close(fd);
1928 }
1929
1930 cleanup:
1931 if (back_file) {
1932 int save_preserve_xattrs = preserve_xattrs;
1933 if (f_copy >= 0)
1934 close(f_copy);
1935 #ifdef SUPPORT_XATTRS
1936 if (preserve_xattrs) {
1937 copy_xattrs(fname, backupptr);
1938 preserve_xattrs = 0;
1939 }
1940 #endif
1941 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1942 preserve_xattrs = save_preserve_xattrs;
1943 if (INFO_GTE(BACKUP, 1)) {
1944 rprintf(FINFO, "backed up %s to %s\n",
1945 fname, backupptr);
1946 }
1947 unmake_file(back_file);
1948 }
1949
1950 free_stat_x(&sx);
1951 }
1952
1953 /* If we are replacing an existing hard link, symlink, device, or special file,
1954 * create a temp-name item and rename it into place. A symlimk specifies slnk,
1955 * a hard link specifies hlnk, otherwise we create a device based on rdev.
1956 * Specify 0 for the del_for_flag if there is not a file to replace. This
1957 * returns 1 on success and 0 on failure. */
1958 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1959 dev_t rdev, stat_x *sxp, int del_for_flag)
1960 {
1961 char tmpname[MAXPATHLEN];
1962 const char *create_name;
1963 int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1964
1965 if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1966 skip_atomic = 1;
1967 else
1968 skip_atomic = 0;
1969
1970 if (del_for_flag) {
1971 if (make_backups > 0 && !dir_in_the_way) {
1972 if (!make_backup(fname, skip_atomic))
1973 return 0;
1974 } else if (skip_atomic) {
1975 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1976 if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1977 return 0;
1978 }
1979 }
1980
1981 create_name = skip_atomic ? fname : tmpname;
1982
1983 if (slnk) {
1984 #ifdef SUPPORT_LINKS
1985 if (do_symlink(slnk, create_name) < 0) {
1986 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1987 full_fname(create_name), slnk);
1988 return 0;
1989 }
1990 #else
1991 return 0;
1992 #endif
1993 } else if (hlnk) {
1994 #ifdef SUPPORT_HARD_LINKS
1995 if (!hard_link_one(file, create_name, hlnk, 0))
1996 return 0;
1997 #else
1998 return 0;
1999 #endif
2000 } else {
2001 if (do_mknod(create_name, file->mode, rdev) < 0) {
2002 rsyserr(FERROR_XFER, errno, "mknod %s failed",
2003 full_fname(create_name));
2004 return 0;
2005 }
2006 }
2007
2008 if (!skip_atomic) {
2009 if (do_rename(tmpname, fname) < 0) {
2010 rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
2011 full_fname(tmpname), full_fname(fname));
2012 do_unlink(tmpname);
2013 return 0;
2014 }
2015 }
2016
2017 return 1;
2018 }
2019
2020 #ifdef SUPPORT_HARD_LINKS
2021 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2022 enum logcode code, int f_out)
2023 {
2024 char fbuf[MAXPATHLEN];
2025 int new_last_ndx;
2026 struct file_list *save_flist = cur_flist;
2027
2028 /* If we skip the last item in a chain of links and there was a
2029 * prior non-skipped hard-link waiting to finish, finish it now. */
2030 if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2031 return;
2032
2033 file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2034 cur_flist->in_progress--; /* undo prior increment */
2035 f_name(file, fbuf);
2036 recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2037
2038 cur_flist = save_flist;
2039 }
2040 #endif
2041
2042 static void touch_up_dirs(struct file_list *flist, int ndx)
2043 {
2044 static int counter = 0;
2045 struct file_struct *file;
2046 char *fname;
2047 BOOL fix_dir_perms;
2048 int i, start, end;
2049
2050 if (ndx < 0) {
2051 start = 0;
2052 end = flist->used - 1;
2053 } else
2054 start = end = ndx;
2055
2056 /* Fix any directory permissions that were modified during the
2057 * transfer and/or re-set any tweaked modified-time values. */
2058 for (i = start; i <= end; i++, counter++) {
2059 file = flist->files[i];
2060 if (!F_IS_ACTIVE(file))
2061 continue;
2062 if (!S_ISDIR(file->mode)
2063 || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2064 continue;
2065 if (DEBUG_GTE(TIME, 2)) {
2066 fname = f_name(file, NULL);
2067 rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2068 NS(fname), i);
2069 }
2070 /* Be sure not to retouch permissions with --fake-super. */
2071 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2072 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2073 continue;
2074 fname = f_name(file, NULL);
2075 if (fix_dir_perms)
2076 do_chmod(fname, file->mode);
2077 if (need_retouch_dir_times) {
2078 STRUCT_STAT st;
2079 if (link_stat(fname, &st, 0) == 0 && mtime_differs(&st, file)) {
2080 st.st_mtime = file->modtime;
2081 #ifdef ST_MTIME_NSEC
2082 st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file);
2083 #endif
2084 set_times(fname, &st);
2085 }
2086 }
2087 if (counter >= loopchk_limit) {
2088 if (allowed_lull)
2089 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2090 else
2091 maybe_flush_socket(0);
2092 counter = 0;
2093 }
2094 }
2095 }
2096
2097 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2098 {
2099 struct file_struct *file;
2100 struct file_list *flist;
2101 char fbuf[MAXPATHLEN];
2102 int ndx;
2103
2104 while (1) {
2105 #ifdef SUPPORT_HARD_LINKS
2106 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2107 int send_failed = (ndx == -2);
2108 if (send_failed)
2109 ndx = get_hlink_num();
2110 flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2111 file = flist->files[ndx - flist->ndx_start];
2112 assert(file->flags & FLAG_HLINKED);
2113 if (send_failed)
2114 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2115 else
2116 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2117 flist->in_progress--;
2118 continue;
2119 }
2120 #endif
2121
2122 if (check_redo && (ndx = get_redo_num()) != -1) {
2123 OFF_T save_max_size = max_size;
2124 OFF_T save_min_size = min_size;
2125 csum_length = SUM_LENGTH;
2126 max_size = -1;
2127 min_size = -1;
2128 ignore_existing = -ignore_existing;
2129 ignore_non_existing = -ignore_non_existing;
2130 update_only = -update_only;
2131 always_checksum = -always_checksum;
2132 size_only = -size_only;
2133 append_mode = -append_mode;
2134 make_backups = -make_backups; /* avoid dup backup w/inplace */
2135 ignore_times++;
2136
2137 flist = cur_flist;
2138 cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2139
2140 file = cur_flist->files[ndx - cur_flist->ndx_start];
2141 if (solo_file)
2142 strlcpy(fbuf, solo_file, sizeof fbuf);
2143 else
2144 f_name(file, fbuf);
2145 recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2146 cur_flist->to_redo--;
2147
2148 cur_flist = flist;
2149
2150 csum_length = SHORT_SUM_LENGTH;
2151 max_size = save_max_size;
2152 min_size = save_min_size;
2153 ignore_existing = -ignore_existing;
2154 ignore_non_existing = -ignore_non_existing;
2155 update_only = -update_only;
2156 always_checksum = -always_checksum;
2157 size_only = -size_only;
2158 append_mode = -append_mode;
2159 make_backups = -make_backups;
2160 ignore_times--;
2161 continue;
2162 }
2163
2164 if (cur_flist == first_flist)
2165 break;
2166
2167 /* We only get here if inc_recurse is enabled. */
2168 if (first_flist->in_progress || first_flist->to_redo)
2169 break;
2170
2171 write_ndx(sock_f_out, NDX_DONE);
2172 if (!read_batch && !flist_eof) {
2173 int old_total = 0;
2174 for (flist = first_flist; flist != cur_flist; flist = flist->next)
2175 old_total += flist->used;
2176 maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2177 }
2178
2179 if (delete_during == 2 || !dir_tweaking) {
2180 /* Skip directory touch-up. */
2181 } else if (first_flist->parent_ndx >= 0)
2182 touch_up_dirs(dir_flist, first_flist->parent_ndx);
2183
2184 flist_free(first_flist); /* updates first_flist */
2185 }
2186 }
2187
2188 void generate_files(int f_out, const char *local_name)
2189 {
2190 int i, ndx, next_loopchk = 0;
2191 char fbuf[MAXPATHLEN];
2192 int itemizing;
2193 enum logcode code;
2194 int save_info_flist = info_levels[INFO_FLIST];
2195 int save_info_progress = info_levels[INFO_PROGRESS];
2196
2197 if (protocol_version >= 29) {
2198 itemizing = 1;
2199 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2200 code = logfile_format_has_i ? FNONE : FLOG;
2201 } else if (am_daemon) {
2202 itemizing = logfile_format_has_i && do_xfers;
2203 maybe_ATTRS_REPORT = ATTRS_REPORT;
2204 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2205 } else if (!am_server) {
2206 itemizing = stdout_format_has_i;
2207 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2208 code = itemizing ? FNONE : FINFO;
2209 } else {
2210 itemizing = 0;
2211 maybe_ATTRS_REPORT = ATTRS_REPORT;
2212 code = FINFO;
2213 }
2214 solo_file = local_name;
2215 dir_tweaking = !(list_only || solo_file || dry_run);
2216 need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2217 loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2218 symlink_timeset_failed_flags = ITEM_REPORT_TIME
2219 | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2220 implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2221
2222 if (DEBUG_GTE(GENR, 1))
2223 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2224
2225 if (delete_before && !solo_file && cur_flist->used > 0)
2226 do_delete_pass();
2227 if (delete_during == 2) {
2228 deldelay_size = BIGPATHBUFLEN * 4;
2229 deldelay_buf = new_array(char, deldelay_size);
2230 if (!deldelay_buf)
2231 out_of_memory("delete-delay");
2232 }
2233 info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2234
2235 if (append_mode > 0 || whole_file < 0)
2236 whole_file = 0;
2237 if (DEBUG_GTE(FLIST, 1)) {
2238 rprintf(FINFO, "delta-transmission %s\n",
2239 whole_file
2240 ? "disabled for local transfer or --whole-file"
2241 : "enabled");
2242 }
2243
2244 dflt_perms = (ACCESSPERMS & ~orig_umask);
2245
2246 do {
2247 #ifdef SUPPORT_HARD_LINKS
2248 if (preserve_hard_links && inc_recurse) {
2249 while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2250 wait_for_receiver();
2251 }
2252 #endif
2253
2254 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2255 struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2256 if (solo_file)
2257 strlcpy(fbuf, solo_file, sizeof fbuf);
2258 else
2259 f_name(fp, fbuf);
2260 ndx = cur_flist->ndx_start - 1;
2261 recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2262 if (delete_during && dry_run < 2 && !list_only
2263 && !(fp->flags & FLAG_MISSING_DIR)) {
2264 if (fp->flags & FLAG_CONTENT_DIR) {
2265 dev_t dirdev;
2266 if (one_file_system) {
2267 uint32 *devp = F_DIR_DEV_P(fp);
2268 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2269 } else
2270 dirdev = MAKEDEV(0, 0);
2271 delete_in_dir(fbuf, fp, &dirdev);
2272 } else
2273 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2274 }
2275 }
2276 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2277 struct file_struct *file = cur_flist->sorted[i];
2278
2279 if (!F_IS_ACTIVE(file))
2280 continue;
2281
2282 if (unsort_ndx)
2283 ndx = F_NDX(file);
2284 else
2285 ndx = i + cur_flist->ndx_start;
2286
2287 if (solo_file)
2288 strlcpy(fbuf, solo_file, sizeof fbuf);
2289 else
2290 f_name(file, fbuf);
2291 recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2292
2293 check_for_finished_files(itemizing, code, 0);
2294
2295 if (i + cur_flist->ndx_start >= next_loopchk) {
2296 if (allowed_lull)
2297 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2298 else
2299 maybe_flush_socket(0);
2300 next_loopchk += loopchk_limit;
2301 }
2302 }
2303
2304 if (!inc_recurse) {
2305 write_ndx(f_out, NDX_DONE);
2306 break;
2307 }
2308
2309 while (1) {
2310 check_for_finished_files(itemizing, code, 1);
2311 if (cur_flist->next || flist_eof)
2312 break;
2313 wait_for_receiver();
2314 }
2315 } while ((cur_flist = cur_flist->next) != NULL);
2316
2317 if (delete_during)
2318 delete_in_dir(NULL, NULL, &dev_zero);
2319 phase++;
2320 if (DEBUG_GTE(GENR, 1))
2321 rprintf(FINFO, "generate_files phase=%d\n", phase);
2322
2323 while (1) {
2324 check_for_finished_files(itemizing, code, 1);
2325 if (msgdone_cnt)
2326 break;
2327 wait_for_receiver();
2328 }
2329
2330 phase++;
2331 if (DEBUG_GTE(GENR, 1))
2332 rprintf(FINFO, "generate_files phase=%d\n", phase);
2333
2334 write_ndx(f_out, NDX_DONE);
2335
2336 /* Reduce round-trip lag-time for a useless delay-updates phase. */
2337 if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2338 write_ndx(f_out, NDX_DONE);
2339
2340 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2341 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2342 write_del_stats(f_out);
2343 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2344 write_ndx(f_out, NDX_DONE);
2345 }
2346
2347 /* Read MSG_DONE for the redo phase (and any prior messages). */
2348 while (1) {
2349 check_for_finished_files(itemizing, code, 0);
2350 if (msgdone_cnt > 1)
2351 break;
2352 wait_for_receiver();
2353 }
2354
2355 if (protocol_version >= 29) {
2356 phase++;
2357 if (DEBUG_GTE(GENR, 1))
2358 rprintf(FINFO, "generate_files phase=%d\n", phase);
2359 if (!EARLY_DELAY_DONE_MSG()) {
2360 write_ndx(f_out, NDX_DONE);
2361 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2362 write_ndx(f_out, NDX_DONE);
2363 }
2364 /* Read MSG_DONE for delay-updates phase & prior messages. */
2365 while (msgdone_cnt == 2)
2366 wait_for_receiver();
2367 }
2368
2369 info_levels[INFO_FLIST] = save_info_flist;
2370 info_levels[INFO_PROGRESS] = save_info_progress;
2371
2372 if (delete_during == 2)
2373 do_delayed_deletions(fbuf);
2374 if (delete_after && !solo_file && file_total > 0)
2375 do_delete_pass();
2376
2377 if (max_delete >= 0 && skipped_deletes) {
2378 rprintf(FWARNING,
2379 "Deletions stopped due to --max-delete limit (%d skipped)\n",
2380 skipped_deletes);
2381 io_error |= IOERR_DEL_LIMIT;
2382 }
2383
2384 if (protocol_version >= 31) {
2385 if (!EARLY_DELETE_DONE_MSG()) {
2386 if (INFO_GTE(STATS, 2) || read_batch)
2387 write_del_stats(f_out);
2388 write_ndx(f_out, NDX_DONE);
2389 }
2390
2391 /* Read MSG_DONE for late-delete phase & prior messages. */
2392 while (msgdone_cnt == 3)
2393 wait_for_receiver();
2394 }
2395
2396 if ((need_retouch_dir_perms || need_retouch_dir_times)
2397 && dir_tweaking && (!inc_recurse || delete_during == 2))
2398 touch_up_dirs(dir_flist, -1);
2399
2400 if (DEBUG_GTE(GENR, 1))
2401 rprintf(FINFO, "generate_files finished\n");
2402 }
rsync: a fast, versatile, remote (and local) file-copying tool