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Some word fixes.
[thirdparty/rsync.git] / generator.c
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) 2003-2022 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_mtimes;
48 extern int omit_dir_times;
49 extern int omit_link_times;
50 extern int delete_mode;
51 extern int delete_before;
52 extern int delete_during;
53 extern int delete_after;
54 extern int missing_args;
55 extern int msgdone_cnt;
56 extern int ignore_errors;
57 extern int remove_source_files;
58 extern int delay_updates;
59 extern int update_only;
60 extern int human_readable;
61 extern int ignore_existing;
62 extern int ignore_non_existing;
63 extern int want_xattr_optim;
64 extern int modify_window;
65 extern int inplace;
66 extern int append_mode;
67 extern int make_backups;
68 extern int csum_length;
69 extern int ignore_times;
70 extern int size_only;
71 extern OFF_T max_size;
72 extern OFF_T min_size;
73 extern int io_error;
74 extern int flist_eof;
75 extern int allowed_lull;
76 extern int sock_f_out;
77 extern int protocol_version;
78 extern int file_total;
79 extern int fuzzy_basis;
80 extern int always_checksum;
81 extern int flist_csum_len;
82 extern char *partial_dir;
83 extern int alt_dest_type;
84 extern int whole_file;
85 extern int list_only;
86 extern int read_batch;
87 extern int write_batch;
88 extern int safe_symlinks;
89 extern int32 block_size;
90 extern int unsort_ndx;
91 extern int max_delete;
92 extern int force_delete;
93 extern int one_file_system;
94 extern int skipped_deletes;
95 extern dev_t filesystem_dev;
96 extern mode_t orig_umask;
97 extern uid_t our_uid;
98 extern char *tmpdir;
99 extern char *basis_dir[MAX_BASIS_DIRS+1];
100 extern struct file_list *cur_flist, *first_flist, *dir_flist;
101 extern filter_rule_list filter_list, daemon_filter_list;
102
103 int maybe_ATTRS_REPORT = 0;
104 int maybe_ATTRS_ACCURATE_TIME = 0;
105
106 static dev_t dev_zero;
107 static int deldelay_size = 0, deldelay_cnt = 0;
108 static char *deldelay_buf = NULL;
109 static int deldelay_fd = -1;
110 static int loopchk_limit;
111 static int dir_tweaking;
112 static int symlink_timeset_failed_flags;
113 static int need_retouch_dir_times;
114 static int need_retouch_dir_perms;
115 static const char *solo_file = NULL;
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, deldelay_size - deldelay_cnt,
173 "%x %s%c", (int)file->mode, fname, '\0');
174 if ((deldelay_cnt += len) <= deldelay_size)
175 break;
176 deldelay_cnt -= len;
177 if (!flush_delete_delay())
178 return 0;
179 }
180
181 return 1;
182 }
183
184 static int read_delay_line(char *buf, int *flags_p)
185 {
186 static int read_pos = 0;
187 unsigned int mode;
188 int j, len;
189 char *bp, *past_space;
190
191 while (1) {
192 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
193 if (j < deldelay_cnt)
194 break;
195 if (deldelay_fd < 0) {
196 if (j > read_pos)
197 goto invalid_data;
198 return -1;
199 }
200 deldelay_cnt -= read_pos;
201 if (deldelay_cnt == deldelay_size)
202 goto invalid_data;
203 if (deldelay_cnt && read_pos) {
204 memmove(deldelay_buf, deldelay_buf + read_pos,
205 deldelay_cnt);
206 }
207 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
208 deldelay_size - deldelay_cnt);
209 if (len == 0) {
210 if (deldelay_cnt) {
211 rprintf(FERROR, "ERROR: unexpected EOF in delete-delay file.\n");
212 }
213 return -1;
214 }
215 if (len < 0) {
216 rsyserr(FERROR, errno,
217 "reading delete-delay file");
218 return -1;
219 }
220 deldelay_cnt += len;
221 read_pos = 0;
222 }
223
224 bp = deldelay_buf + read_pos;
225 if (*bp == '!') {
226 bp++;
227 *flags_p = DEL_NO_UID_WRITE;
228 } else
229 *flags_p = 0;
230
231 if (sscanf(bp, "%x ", &mode) != 1) {
232 invalid_data:
233 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
234 return -1;
235 }
236 past_space = strchr(bp, ' ') + 1;
237 len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
238 read_pos = j + 1;
239
240 if (len > MAXPATHLEN) {
241 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
242 return -1;
243 }
244
245 /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
246 * instead of returning a pointer to our buffer. */
247 memcpy(buf, past_space, len);
248
249 return mode;
250 }
251
252 static void do_delayed_deletions(char *delbuf)
253 {
254 int mode, flags;
255
256 if (deldelay_fd >= 0) {
257 if (deldelay_cnt && !flush_delete_delay())
258 return;
259 lseek(deldelay_fd, 0, 0);
260 }
261 while ((mode = read_delay_line(delbuf, &flags)) >= 0)
262 delete_item(delbuf, mode, flags | DEL_RECURSE);
263 if (deldelay_fd >= 0)
264 close(deldelay_fd);
265 }
266
267 /* This function is used to implement per-directory deletion, and is used by
268 * all the --delete-WHEN options. Note that the fbuf pointer must point to a
269 * MAXPATHLEN buffer with the name of the directory in it (the functions we
270 * call will append names onto the end, but the old dir value will be restored
271 * on exit). */
272 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t fs_dev)
273 {
274 static int already_warned = 0;
275 static struct hashtable *dev_tbl;
276 struct file_list *dirlist;
277 char delbuf[MAXPATHLEN];
278 int dlen, i;
279
280 if (!fbuf) {
281 change_local_filter_dir(NULL, 0, 0);
282 return;
283 }
284
285 if (DEBUG_GTE(DEL, 2))
286 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
287
288 if (allowed_lull)
289 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
290
291 if (io_error & IOERR_GENERAL && !ignore_errors) {
292 if (already_warned)
293 return;
294 rprintf(FINFO,
295 "IO error encountered -- skipping file deletion\n");
296 already_warned = 1;
297 return;
298 }
299
300 dlen = strlen(fbuf);
301 change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
302
303 if (one_file_system) {
304 if (!dev_tbl)
305 dev_tbl = hashtable_create(16, HT_KEY64);
306 if (file->flags & FLAG_TOP_DIR) {
307 hashtable_find(dev_tbl, fs_dev+1, "");
308 filesystem_dev = fs_dev;
309 } else if (filesystem_dev != fs_dev) {
310 if (!hashtable_find(dev_tbl, fs_dev+1, NULL))
311 return;
312 filesystem_dev = fs_dev; /* it's a prior top-dir dev */
313 }
314 }
315
316 dirlist = get_dirlist(fbuf, dlen, 0);
317
318 /* If an item in dirlist is not found in flist, delete it
319 * from the filesystem. */
320 for (i = dirlist->used; i--; ) {
321 struct file_struct *fp = dirlist->files[i];
322 if (!F_IS_ACTIVE(fp))
323 continue;
324 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
325 if (INFO_GTE(MOUNT, 1))
326 rprintf(FINFO, "cannot delete mount point: %s\n",
327 f_name(fp, NULL));
328 continue;
329 }
330 /* Here we want to match regardless of file type. Replacement
331 * of a file with one of another type is handled separately by
332 * a delete_item call with a DEL_MAKE_ROOM flag. */
333 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
334 int flags = DEL_RECURSE;
335 if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
336 flags |= DEL_NO_UID_WRITE;
337 f_name(fp, delbuf);
338 if (delete_during == 2) {
339 if (!remember_delete(fp, delbuf, flags))
340 break;
341 } else
342 delete_item(delbuf, fp->mode, flags);
343 }
344 }
345
346 flist_free(dirlist);
347 }
348
349 /* This deletes any files on the receiving side that are not present on the
350 * sending side. This is used by --delete-before and --delete-after. */
351 static void do_delete_pass(void)
352 {
353 char fbuf[MAXPATHLEN];
354 STRUCT_STAT st;
355 int j;
356
357 /* dry_run is incremented when the destination doesn't exist yet. */
358 if (dry_run > 1 || list_only)
359 return;
360
361 for (j = 0; j < cur_flist->used; j++) {
362 struct file_struct *file = cur_flist->sorted[j];
363
364 if (!F_IS_ACTIVE(file))
365 continue;
366
367 f_name(file, fbuf);
368
369 if (!(file->flags & FLAG_CONTENT_DIR)) {
370 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
371 continue;
372 }
373
374 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
375 rprintf(FINFO, "deleting in %s\n", fbuf);
376
377 if (link_stat(fbuf, &st, keep_dirlinks) < 0
378 || !S_ISDIR(st.st_mode))
379 continue;
380
381 delete_in_dir(fbuf, file, st.st_dev);
382 }
383 delete_in_dir(NULL, NULL, dev_zero);
384
385 if (INFO_GTE(FLIST, 2) && !am_server)
386 rprintf(FINFO, " \r");
387 }
388
389 static inline int mtime_differs(STRUCT_STAT *stp, struct file_struct *file)
390 {
391 #ifdef ST_MTIME_NSEC
392 return !same_time(stp->st_mtime, stp->ST_MTIME_NSEC, file->modtime, F_MOD_NSEC_or_0(file));
393 #else
394 return !same_time(stp->st_mtime, 0, file->modtime, 0);
395 #endif
396 }
397
398 static inline int any_time_differs(stat_x *sxp, struct file_struct *file, UNUSED(const char *fname))
399 {
400 int differs = mtime_differs(&sxp->st, file);
401 #ifdef SUPPORT_CRTIMES
402 if (!differs && crtimes_ndx) {
403 if (sxp->crtime == 0)
404 sxp->crtime = get_create_time(fname, &sxp->st);
405 differs = !same_time(sxp->crtime, 0, F_CRTIME(file), 0);
406 }
407 #endif
408 return differs;
409 }
410
411 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
412 {
413 if (preserve_perms)
414 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
415
416 if (preserve_executability)
417 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
418
419 return 0;
420 }
421
422 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
423 {
424 if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
425 return 1;
426
427 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
428 return 1;
429
430 return 0;
431 }
432
433 #ifdef SUPPORT_ACLS
434 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
435 {
436 if (preserve_acls) {
437 if (!ACL_READY(*sxp))
438 get_acl(fname, sxp);
439 if (set_acl(NULL, file, sxp, file->mode))
440 return 1;
441 }
442
443 return 0;
444 }
445 #endif
446
447 #ifdef SUPPORT_XATTRS
448 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
449 {
450 if (preserve_xattrs) {
451 if (!XATTR_READY(*sxp))
452 get_xattr(fname, sxp);
453 if (xattr_diff(file, sxp, 0))
454 return 1;
455 }
456
457 return 0;
458 }
459 #endif
460
461 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
462 {
463 if (S_ISLNK(file->mode)) {
464 #ifdef CAN_SET_SYMLINK_TIMES
465 if (preserve_mtimes && !omit_link_times && any_time_differs(sxp, file, fname))
466 return 0;
467 #endif
468 #ifdef CAN_CHMOD_SYMLINK
469 if (perms_differ(file, sxp))
470 return 0;
471 #endif
472 #ifdef CAN_CHOWN_SYMLINK
473 if (ownership_differs(file, sxp))
474 return 0;
475 #endif
476 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
477 if (acls_differ(fname, file, sxp))
478 return 0;
479 #endif
480 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
481 if (xattrs_differ(fname, file, sxp))
482 return 0;
483 #endif
484 } else {
485 if (preserve_mtimes && any_time_differs(sxp, file, fname))
486 return 0;
487 if (perms_differ(file, sxp))
488 return 0;
489 if (ownership_differs(file, sxp))
490 return 0;
491 #ifdef SUPPORT_ACLS
492 if (acls_differ(fname, file, sxp))
493 return 0;
494 #endif
495 #ifdef SUPPORT_XATTRS
496 if (xattrs_differ(fname, file, sxp))
497 return 0;
498 #endif
499 }
500
501 return 1;
502 }
503
504 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
505 stat_x *sxp, int32 iflags, uchar fnamecmp_type,
506 const char *xname)
507 {
508 if (statret >= 0) { /* A from-dest-dir statret can == 1! */
509 int keep_time = !preserve_mtimes ? 0
510 : S_ISDIR(file->mode) ? !omit_dir_times
511 : S_ISLNK(file->mode) ? !omit_link_times
512 : 1;
513
514 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
515 iflags |= ITEM_REPORT_SIZE;
516 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
517 if (iflags & ITEM_LOCAL_CHANGE)
518 iflags |= symlink_timeset_failed_flags;
519 } else if (keep_time
520 ? mtime_differs(&sxp->st, file)
521 : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
522 && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
523 iflags |= ITEM_REPORT_TIME;
524 if (atimes_ndx && !S_ISDIR(file->mode) && !S_ISLNK(file->mode)
525 && !same_time(F_ATIME(file), 0, sxp->st.st_atime, 0))
526 iflags |= ITEM_REPORT_ATIME;
527 #ifdef SUPPORT_CRTIMES
528 if (crtimes_ndx) {
529 if (sxp->crtime == 0)
530 sxp->crtime = get_create_time(fnamecmp, &sxp->st);
531 if (!same_time(sxp->crtime, 0, F_CRTIME(file), 0))
532 iflags |= ITEM_REPORT_CRTIME;
533 }
534 #endif
535 #ifndef CAN_CHMOD_SYMLINK
536 if (S_ISLNK(file->mode)) {
537 ;
538 } else
539 #endif
540 if (preserve_perms) {
541 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
542 iflags |= ITEM_REPORT_PERMS;
543 } else if (preserve_executability
544 && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
545 iflags |= ITEM_REPORT_PERMS;
546 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
547 iflags |= ITEM_REPORT_OWNER;
548 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
549 iflags |= ITEM_REPORT_GROUP;
550 #ifdef SUPPORT_ACLS
551 if (preserve_acls && !S_ISLNK(file->mode)) {
552 if (!ACL_READY(*sxp))
553 get_acl(fnamecmp, sxp);
554 if (set_acl(NULL, file, sxp, file->mode))
555 iflags |= ITEM_REPORT_ACL;
556 }
557 #endif
558 #ifdef SUPPORT_XATTRS
559 if (preserve_xattrs) {
560 if (!XATTR_READY(*sxp))
561 get_xattr(fnamecmp, sxp);
562 if (xattr_diff(file, sxp, 1))
563 iflags |= ITEM_REPORT_XATTR;
564 }
565 #endif
566 } else {
567 #ifdef SUPPORT_XATTRS
568 if (preserve_xattrs && xattr_diff(file, NULL, 1))
569 iflags |= ITEM_REPORT_XATTR;
570 #endif
571 iflags |= ITEM_IS_NEW;
572 }
573
574 iflags &= 0xffff;
575 if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
576 || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
577 if (protocol_version >= 29) {
578 if (ndx >= 0)
579 write_ndx(sock_f_out, ndx);
580 write_shortint(sock_f_out, iflags);
581 if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
582 write_byte(sock_f_out, fnamecmp_type);
583 if (iflags & ITEM_XNAME_FOLLOWS)
584 write_vstring(sock_f_out, xname, strlen(xname));
585 #ifdef SUPPORT_XATTRS
586 if (preserve_xattrs && do_xfers
587 && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
588 int fd = iflags & ITEM_REPORT_XATTR
589 && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
590 ? sock_f_out : -1;
591 send_xattr_request(NULL, file, fd);
592 }
593 #endif
594 } else if (ndx >= 0) {
595 enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
596 log_item(code, file, iflags, xname);
597 }
598 }
599 }
600
601 static enum filetype get_file_type(mode_t mode)
602 {
603 if (S_ISREG(mode))
604 return FT_REG;
605 if (S_ISLNK(mode))
606 return FT_SYMLINK;
607 if (S_ISDIR(mode))
608 return FT_DIR;
609 if (IS_SPECIAL(mode))
610 return FT_SPECIAL;
611 if (IS_DEVICE(mode))
612 return FT_DEVICE;
613 return FT_UNSUPPORTED;
614 }
615
616 /* Perform our quick-check heuristic for determining if a file is unchanged. */
617 int quick_check_ok(enum filetype ftype, const char *fn, struct file_struct *file, STRUCT_STAT *st)
618 {
619 switch (ftype) {
620 case FT_REG:
621 if (st->st_size != F_LENGTH(file))
622 return 0;
623
624 /* If always_checksum is set then we use the checksum instead
625 * of the file mtime to determine whether to sync. */
626 if (always_checksum > 0) {
627 char sum[MAX_DIGEST_LEN];
628 file_checksum(fn, st, sum);
629 return memcmp(sum, F_SUM(file), flist_csum_len) == 0;
630 }
631
632 if (size_only > 0)
633 return 1;
634
635 if (ignore_times)
636 return 0;
637
638 if (mtime_differs(st, file))
639 return 0;
640 break;
641 case FT_DIR:
642 break;
643 case FT_SYMLINK: {
644 #ifdef SUPPORT_LINKS
645 char lnk[MAXPATHLEN];
646 int len = do_readlink(fn, lnk, MAXPATHLEN-1);
647 if (len <= 0)
648 return 0;
649 lnk[len] = '\0';
650 if (strcmp(lnk, F_SYMLINK(file)) != 0)
651 return 0;
652 break;
653 #else
654 return -1;
655 #endif
656 }
657 case FT_SPECIAL:
658 if (!BITS_EQUAL(file->mode, st->st_mode, _S_IFMT))
659 return 0;
660 break;
661 case FT_DEVICE: {
662 uint32 *devp = F_RDEV_P(file);
663 if (st->st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
664 return 0;
665 break;
666 }
667 case FT_UNSUPPORTED:
668 return -1;
669 }
670 return 1;
671 }
672
673 /*
674 * set (initialize) the size entries in the per-file sum_struct
675 * calculating dynamic block and checksum sizes.
676 *
677 * This is only called from generate_and_send_sums() but is a separate
678 * function to encapsulate the logic.
679 *
680 * The block size is a rounded square root of file length.
681 *
682 * The checksum size is determined according to:
683 * blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
684 * provided by Donovan Baarda which gives a probability of rsync
685 * algorithm corrupting data and falling back using the whole md4
686 * checksums.
687 *
688 * This might be made one of several selectable heuristics.
689 */
690 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
691 {
692 int32 blength;
693 int s2length;
694 int64 l;
695
696 if (len < 0) {
697 /* The file length overflowed our int64 var, so we can't process this file. */
698 sum->count = -1; /* indicate overflow error */
699 return;
700 }
701
702 if (block_size)
703 blength = block_size;
704 else if (len <= BLOCK_SIZE * BLOCK_SIZE)
705 blength = BLOCK_SIZE;
706 else {
707 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
708 int32 c;
709 int cnt;
710 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
711 if (c < 0 || c >= max_blength)
712 blength = max_blength;
713 else {
714 blength = 0;
715 do {
716 blength |= c;
717 if (len < (int64)blength * blength)
718 blength &= ~c;
719 c >>= 1;
720 } while (c >= 8); /* round to multiple of 8 */
721 blength = MAX(blength, BLOCK_SIZE);
722 }
723 }
724
725 if (protocol_version < 27) {
726 s2length = csum_length;
727 } else if (csum_length == SUM_LENGTH) {
728 s2length = SUM_LENGTH;
729 } else {
730 int32 c;
731 int b = BLOCKSUM_BIAS;
732 for (l = len; l >>= 1; b += 2) {}
733 for (c = blength; (c >>= 1) && b; b--) {}
734 /* add a bit, subtract rollsum, round up. */
735 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
736 s2length = MAX(s2length, csum_length);
737 s2length = MIN(s2length, SUM_LENGTH);
738 }
739
740 sum->flength = len;
741 sum->blength = blength;
742 sum->s2length = s2length;
743 sum->remainder = (int32)(len % blength);
744 sum->count = (int32)(l = (len / blength) + (sum->remainder != 0));
745
746 if ((int64)sum->count != l)
747 sum->count = -1;
748
749 if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
750 rprintf(FINFO,
751 "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
752 big_num(sum->count), (long)sum->remainder, (long)sum->blength,
753 sum->s2length, big_num(sum->flength));
754 }
755 }
756
757
758 /*
759 * Generate and send a stream of signatures/checksums that describe a buffer
760 *
761 * Generate approximately one checksum every block_len bytes.
762 */
763 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
764 {
765 int32 i;
766 struct map_struct *mapbuf;
767 struct sum_struct sum;
768 OFF_T offset = 0;
769
770 sum_sizes_sqroot(&sum, len);
771 if (sum.count < 0)
772 return -1;
773 write_sum_head(f_out, &sum);
774
775 if (append_mode > 0 && f_copy < 0)
776 return 0;
777
778 if (len > 0)
779 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
780 else
781 mapbuf = NULL;
782
783 for (i = 0; i < sum.count; i++) {
784 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
785 char *map = map_ptr(mapbuf, offset, n1);
786 char sum2[SUM_LENGTH];
787 uint32 sum1;
788
789 len -= n1;
790 offset += n1;
791
792 if (f_copy >= 0) {
793 full_write(f_copy, map, n1);
794 if (append_mode > 0)
795 continue;
796 }
797
798 sum1 = get_checksum1(map, n1);
799 get_checksum2(map, n1, sum2);
800
801 if (DEBUG_GTE(DELTASUM, 3)) {
802 rprintf(FINFO,
803 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
804 big_num(i), big_num(offset - n1), (long)n1,
805 (unsigned long)sum1);
806 }
807 write_int(f_out, sum1);
808 write_buf(f_out, sum2, sum.s2length);
809 }
810
811 if (mapbuf)
812 unmap_file(mapbuf);
813
814 return 0;
815 }
816
817
818 /* Try to find a filename in the same dir as "fname" with a similar name. */
819 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
820 {
821 int fname_len, fname_suf_len;
822 const char *fname_suf, *fname = file->basename;
823 uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
824 int i, j;
825 struct file_struct *lowest_fp = NULL;
826
827 fname_len = strlen(fname);
828 fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
829
830 /* Try to find an exact size+mtime match first. */
831 for (i = 0; i < fuzzy_basis; i++) {
832 struct file_list *dirlist = dirlist_array[i];
833
834 if (!dirlist)
835 continue;
836
837 for (j = 0; j < dirlist->used; j++) {
838 struct file_struct *fp = dirlist->files[j];
839
840 if (!F_IS_ACTIVE(fp))
841 continue;
842
843 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
844 continue;
845
846 if (F_LENGTH(fp) == F_LENGTH(file) && same_time(fp->modtime, 0, file->modtime, 0)) {
847 if (DEBUG_GTE(FUZZY, 2))
848 rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
849 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
850 return fp;
851 }
852
853 }
854 }
855
856 for (i = 0; i < fuzzy_basis; i++) {
857 struct file_list *dirlist = dirlist_array[i];
858
859 if (!dirlist)
860 continue;
861
862 for (j = 0; j < dirlist->used; j++) {
863 struct file_struct *fp = dirlist->files[j];
864 const char *suf, *name;
865 int len, suf_len;
866 uint32 dist;
867
868 if (!F_IS_ACTIVE(fp))
869 continue;
870
871 if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
872 continue;
873
874 name = fp->basename;
875 len = strlen(name);
876 suf = find_filename_suffix(name, len, &suf_len);
877
878 dist = fuzzy_distance(name, len, fname, fname_len);
879 /* Add some extra weight to how well the suffixes match. */
880 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
881 if (DEBUG_GTE(FUZZY, 2)) {
882 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
883 f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
884 }
885 if (dist <= lowest_dist) {
886 lowest_dist = dist;
887 lowest_fp = fp;
888 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
889 }
890 }
891 }
892
893 return lowest_fp;
894 }
895
896 /* Copy a file found in our --copy-dest handling. */
897 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
898 {
899 char buf[MAXPATHLEN];
900 const char *copy_to, *partialptr;
901 int save_preserve_xattrs = preserve_xattrs;
902 int ok, fd_w;
903
904 if (inplace) {
905 /* Let copy_file open the destination in place. */
906 fd_w = -1;
907 copy_to = dest;
908 } else {
909 fd_w = open_tmpfile(buf, dest, file);
910 if (fd_w < 0)
911 return -1;
912 copy_to = buf;
913 }
914 cleanup_set(copy_to, NULL, NULL, -1, -1);
915 if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
916 if (INFO_GTE(COPY, 1)) {
917 rsyserr(FINFO, errno, "copy_file %s => %s",
918 full_fname(src), copy_to);
919 }
920 /* Try to clean up. */
921 unlink(copy_to);
922 cleanup_disable();
923 return -1;
924 }
925 partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
926 preserve_xattrs = 0; /* xattrs were copied with file */
927 ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
928 preserve_xattrs = save_preserve_xattrs;
929 cleanup_disable();
930 return ok ? 0 : -1;
931 }
932
933 /* This is only called for regular files. We return -2 if we've finished
934 * handling the file, -1 if no dest-linking occurred, or a non-negative
935 * value if we found an alternate basis file. If we're called with the
936 * find_exact_for_existing flag, the destination file already exists, so
937 * we only try to find an exact alt-dest match. In this case, the returns
938 * are only -2 & -1 (both as above). */
939 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
940 char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
941 int itemizing, enum logcode code)
942 {
943 STRUCT_STAT real_st = sxp->st;
944 int best_match = -1;
945 int match_level = 0;
946 int j = 0;
947
948 do {
949 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
950 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
951 continue;
952 if (match_level == 0) {
953 best_match = j;
954 match_level = 1;
955 }
956 if (!quick_check_ok(FT_REG, cmpbuf, file, &sxp->st))
957 continue;
958 if (match_level == 1) {
959 best_match = j;
960 match_level = 2;
961 }
962 if (unchanged_attrs(cmpbuf, file, sxp)) {
963 best_match = j;
964 match_level = 3;
965 break;
966 }
967 free_stat_x(sxp);
968 } while (basis_dir[++j] != NULL);
969
970 if (!match_level)
971 goto got_nothing_for_ya;
972
973 if (j != best_match) {
974 j = best_match;
975 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
976 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
977 goto got_nothing_for_ya;
978 }
979
980 if (match_level == 3 && alt_dest_type != COPY_DEST) {
981 if (find_exact_for_existing) {
982 if (alt_dest_type == LINK_DEST && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
983 return -1;
984 if (do_unlink(fname) < 0 && errno != ENOENT)
985 goto got_nothing_for_ya;
986 }
987 #ifdef SUPPORT_HARD_LINKS
988 if (alt_dest_type == LINK_DEST) {
989 if (!hard_link_one(file, fname, cmpbuf, 1))
990 goto try_a_copy;
991 if (atimes_ndx)
992 set_file_attrs(fname, file, sxp, NULL, 0);
993 if (preserve_hard_links && F_IS_HLINKED(file))
994 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
995 if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
996 itemize(cmpbuf, file, ndx, 1, sxp,
997 ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
998 0, "");
999 }
1000 } else
1001 #endif
1002 {
1003 if (itemizing)
1004 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1005 }
1006 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
1007 rprintf(FCLIENT, "%s is uptodate\n", fname);
1008 return -2;
1009 }
1010
1011 if (find_exact_for_existing)
1012 goto got_nothing_for_ya;
1013
1014 if (match_level >= 2) {
1015 #ifdef SUPPORT_HARD_LINKS
1016 try_a_copy: /* Copy the file locally. */
1017 #endif
1018 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
1019 if (find_exact_for_existing) /* Can get here via hard-link failure */
1020 goto got_nothing_for_ya;
1021 return -1;
1022 }
1023 if (itemizing)
1024 itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1025 if (maybe_ATTRS_REPORT
1026 && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
1027 || (INFO_GTE(NAME, 2) && match_level == 3))) {
1028 code = match_level == 3 ? FCLIENT : FINFO;
1029 rprintf(code, "%s%s\n", fname,
1030 match_level == 3 ? " is uptodate" : "");
1031 }
1032 #ifdef SUPPORT_HARD_LINKS
1033 if (preserve_hard_links && F_IS_HLINKED(file))
1034 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1035 #endif
1036 return -2;
1037 }
1038
1039 return FNAMECMP_BASIS_DIR_LOW + j;
1040
1041 got_nothing_for_ya:
1042 sxp->st = real_st;
1043 return -1;
1044 }
1045
1046 /* This is only called for non-regular files. We return -2 if we've finished
1047 * handling the file, or -1 if no dest-linking occurred, or a non-negative
1048 * value if we found an alternate basis file. */
1049 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1050 char *cmpbuf, stat_x *sxp, int itemizing,
1051 enum logcode code)
1052 {
1053 int best_match = -1;
1054 int match_level = 0;
1055 enum filetype ftype = get_file_type(file->mode);
1056 int j = 0;
1057
1058 #ifndef SUPPORT_LINKS
1059 if (ftype == FT_SYMLINK)
1060 return -1;
1061 #endif
1062 if (ftype == FT_REG || ftype == FT_UNSUPPORTED) {
1063 rprintf(FERROR,
1064 "internal: try_dests_non() called with invalid mode (%o)\n",
1065 (int)file->mode);
1066 exit_cleanup(RERR_UNSUPPORTED);
1067 }
1068
1069 do {
1070 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1071 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1072 continue;
1073 if (ftype != get_file_type(sxp->st.st_mode))
1074 continue;
1075 if (match_level < 1) {
1076 match_level = 1;
1077 best_match = j;
1078 }
1079 if (!quick_check_ok(ftype, cmpbuf, file, &sxp->st))
1080 continue;
1081 if (match_level < 2) {
1082 match_level = 2;
1083 best_match = j;
1084 }
1085 if (unchanged_attrs(cmpbuf, file, sxp)) {
1086 match_level = 3;
1087 best_match = j;
1088 break;
1089 }
1090 } while (basis_dir[++j] != NULL);
1091
1092 if (!match_level)
1093 return -1;
1094
1095 if (j != best_match) {
1096 j = best_match;
1097 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1098 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1099 return -1;
1100 }
1101
1102 if (match_level == 3) {
1103 #ifdef SUPPORT_HARD_LINKS
1104 if (alt_dest_type == LINK_DEST
1105 #ifndef CAN_HARDLINK_SYMLINK
1106 && !S_ISLNK(file->mode)
1107 #endif
1108 #ifndef CAN_HARDLINK_SPECIAL
1109 && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1110 #endif
1111 && !S_ISDIR(file->mode)) {
1112 if (do_link(cmpbuf, fname) < 0) {
1113 rsyserr(FERROR_XFER, errno,
1114 "failed to hard-link %s with %s",
1115 cmpbuf, fname);
1116 return j;
1117 }
1118 if (preserve_hard_links && F_IS_HLINKED(file))
1119 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1120 } else
1121 #endif
1122 match_level = 2;
1123 if (itemizing && stdout_format_has_i
1124 && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1125 int chg = alt_dest_type == COMPARE_DEST && ftype != FT_DIR ? 0
1126 : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1127 char *lp = match_level == 3 ? "" : NULL;
1128 itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1129 }
1130 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1131 rprintf(FCLIENT, "%s%s is uptodate\n",
1132 fname, ftype == FT_DIR ? "/" : "");
1133 }
1134 return -2;
1135 }
1136
1137 return j;
1138 }
1139
1140 static void list_file_entry(struct file_struct *f)
1141 {
1142 char permbuf[PERMSTRING_SIZE];
1143 const char *mtime_str = timestring(f->modtime);
1144 int size_width = human_readable ? 14 : 11;
1145 int mtime_width = 1 + strlen(mtime_str);
1146 int atime_width = atimes_ndx ? mtime_width : 0;
1147 int crtime_width = crtimes_ndx ? mtime_width : 0;
1148
1149 if (!F_IS_ACTIVE(f)) {
1150 /* this can happen if duplicate names were removed */
1151 return;
1152 }
1153
1154 /* TODO: indicate '+' if the entry has an ACL. */
1155
1156 if (missing_args == 2 && f->mode == 0) {
1157 rprintf(FINFO, "%-*s %s\n",
1158 10 + 1 + size_width + mtime_width + atime_width + crtime_width, "*missing",
1159 f_name(f, NULL));
1160 } else {
1161 const char *atime_str = atimes_ndx && !S_ISDIR(f->mode) ? timestring(F_ATIME(f)) : "";
1162 const char *crtime_str = crtimes_ndx ? timestring(F_CRTIME(f)) : "";
1163 const char *arrow, *lnk;
1164
1165 permstring(permbuf, f->mode);
1166
1167 #ifdef SUPPORT_LINKS
1168 if (preserve_links && S_ISLNK(f->mode)) {
1169 arrow = " -> ";
1170 lnk = F_SYMLINK(f);
1171 } else
1172 #endif
1173 arrow = lnk = "";
1174
1175 rprintf(FINFO, "%s %*s %s%*s%*s %s%s%s\n",
1176 permbuf, size_width, human_num(F_LENGTH(f)),
1177 timestring(f->modtime), atime_width, atime_str, crtime_width, crtime_str,
1178 f_name(f, NULL), arrow, lnk);
1179 }
1180 }
1181
1182 static int phase = 0;
1183 static int dflt_perms;
1184
1185 static int implied_dirs_are_missing;
1186 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1187 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1188 {
1189 return F_DEPTH(file) > F_DEPTH(subtree)
1190 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1191 }
1192
1193 /* Acts on the indicated item in cur_flist whose name is fname. If a dir,
1194 * make sure it exists, and has the right permissions/timestamp info. For
1195 * all other non-regular files (symlinks, etc.) we create them here. For
1196 * regular files that have changed, we try to find a basis file and then
1197 * start sending checksums. The ndx is the file's unique index value.
1198 *
1199 * The fname parameter must point to a MAXPATHLEN buffer! (e.g it gets
1200 * passed to delete_item(), which can use it during a recursive delete.)
1201 *
1202 * Note that f_out is set to -1 when doing final directory-permission and
1203 * modification-time repair. */
1204 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1205 int itemizing, enum logcode code, int f_out)
1206 {
1207 static const char *parent_dirname = "";
1208 static struct file_struct *prior_dir_file = NULL;
1209 /* Missing dir not created due to --dry-run; will still be scanned. */
1210 static struct file_struct *dry_missing_dir = NULL;
1211 /* Missing dir whose contents are skipped altogether due to
1212 * --ignore-non-existing, daemon exclude, or mkdir failure. */
1213 static struct file_struct *skip_dir = NULL;
1214 static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1215 static int need_fuzzy_dirlist = 0;
1216 struct file_struct *fuzzy_file = NULL;
1217 int fd = -1, f_copy = -1;
1218 stat_x sx, real_sx;
1219 STRUCT_STAT partial_st;
1220 struct file_struct *back_file = NULL;
1221 int statret, real_ret, stat_errno;
1222 char *fnamecmp, *partialptr, *backupptr = NULL;
1223 char fnamecmpbuf[MAXPATHLEN];
1224 uchar fnamecmp_type;
1225 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1226 enum filetype stype, ftype = get_file_type(file->mode);
1227 int is_dir = ftype != FT_DIR ? 0
1228 : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1229 : 1;
1230
1231 if (DEBUG_GTE(GENR, 1))
1232 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1233
1234 if (list_only) {
1235 if (is_dir < 0
1236 || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1237 return;
1238 list_file_entry(file);
1239 return;
1240 }
1241
1242 maybe_ATTRS_ACCURATE_TIME = always_checksum ? ATTRS_ACCURATE_TIME : 0;
1243
1244 if (skip_dir) {
1245 if (is_below(file, skip_dir)) {
1246 if (is_dir)
1247 file->flags |= FLAG_MISSING_DIR;
1248 #ifdef SUPPORT_HARD_LINKS
1249 else if (F_IS_HLINKED(file))
1250 handle_skipped_hlink(file, itemizing, code, f_out);
1251 #endif
1252 return;
1253 }
1254 skip_dir = NULL;
1255 }
1256
1257 init_stat_x(&sx);
1258 if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1259 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1260 if (is_dir < 0)
1261 return;
1262 #ifdef SUPPORT_HARD_LINKS
1263 if (F_IS_HLINKED(file))
1264 handle_skipped_hlink(file, itemizing, code, f_out);
1265 #endif
1266 rprintf(FERROR_XFER,
1267 "ERROR: daemon refused to receive %s \"%s\"\n",
1268 is_dir ? "directory" : "file", fname);
1269 if (is_dir)
1270 goto skipping_dir_contents;
1271 return;
1272 }
1273 }
1274
1275 if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1276 int i;
1277 parent_is_dry_missing:
1278 for (i = 0; i < fuzzy_basis; i++) {
1279 if (fuzzy_dirlist[i]) {
1280 flist_free(fuzzy_dirlist[i]);
1281 fuzzy_dirlist[i] = NULL;
1282 }
1283 }
1284 parent_dirname = "";
1285 statret = -1;
1286 stat_errno = ENOENT;
1287 } else {
1288 const char *dn = file->dirname ? file->dirname : ".";
1289 dry_missing_dir = NULL;
1290 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1291 /* Each parent dir must be in the file list or the flist data is bad.
1292 * Optimization: most of the time the parent dir will be the last dir
1293 * this function was asked to process in the file list. */
1294 if (!inc_recurse
1295 && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
1296 && (!prior_dir_file || strcmp(dn, f_name(prior_dir_file, NULL)) != 0)) {
1297 int ok = 0, j = flist_find_name(cur_flist, dn, -1);
1298 if (j >= 0) {
1299 struct file_struct *f = cur_flist->sorted[j];
1300 if (S_ISDIR(f->mode) || (missing_args == 2 && !file->mode && !f->mode))
1301 ok = 1;
1302 }
1303 /* The --delete-missing-args option can actually put invalid entries into
1304 * the file list, so if that option was specified, we'll just complain about
1305 * it and allow it. */
1306 if (!ok && missing_args == 2 && file->mode == 0 && j < 0)
1307 rprintf(FERROR, "WARNING: parent dir is absent in the file list: %s\n", dn);
1308 else if (!ok) {
1309 rprintf(FERROR, "ABORTING due to invalid path from sender: %s/%s\n",
1310 dn, file->basename);
1311 exit_cleanup(RERR_PROTOCOL);
1312 }
1313 }
1314 if (relative_paths && !implied_dirs && file->mode != 0
1315 && do_stat(dn, &sx.st) < 0) {
1316 if (dry_run)
1317 goto parent_is_dry_missing;
1318 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1319 rsyserr(FERROR_XFER, errno,
1320 "recv_generator: mkdir %s failed",
1321 full_fname(dn));
1322 }
1323 }
1324 if (fuzzy_basis) {
1325 int i;
1326 for (i = 0; i < fuzzy_basis; i++) {
1327 if (fuzzy_dirlist[i]) {
1328 flist_free(fuzzy_dirlist[i]);
1329 fuzzy_dirlist[i] = NULL;
1330 }
1331 }
1332 need_fuzzy_dirlist = 1;
1333 }
1334 #ifdef SUPPORT_ACLS
1335 if (!preserve_perms)
1336 dflt_perms = default_perms_for_dir(dn);
1337 #endif
1338 }
1339 parent_dirname = dn;
1340
1341 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1342 stat_errno = errno;
1343 }
1344
1345 if (missing_args == 2 && file->mode == 0) {
1346 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1347 return;
1348 if (statret == 0)
1349 delete_item(fname, sx.st.st_mode, del_opts);
1350 return;
1351 }
1352
1353 if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1354 if (is_dir) {
1355 if (is_dir < 0)
1356 return;
1357 skip_dir = file;
1358 file->flags |= FLAG_MISSING_DIR;
1359 }
1360 #ifdef SUPPORT_HARD_LINKS
1361 else if (F_IS_HLINKED(file))
1362 handle_skipped_hlink(file, itemizing, code, f_out);
1363 #endif
1364 if (INFO_GTE(SKIP, 1)) {
1365 rprintf(FINFO, "not creating new %s \"%s\"\n",
1366 is_dir ? "directory" : "file", fname);
1367 }
1368 return;
1369 }
1370
1371 if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1372 && !am_root && sx.st.st_uid == our_uid)
1373 del_opts |= DEL_NO_UID_WRITE;
1374
1375 if (statret == 0)
1376 stype = get_file_type(sx.st.st_mode);
1377 else
1378 stype = FT_UNSUPPORTED;
1379
1380 if (ignore_existing > 0 && statret == 0
1381 && (!is_dir || stype != FT_DIR)) {
1382 if (INFO_GTE(SKIP, 1) && is_dir >= 0) {
1383 const char *suf = "";
1384 if (INFO_GTE(SKIP, 2)) {
1385 if (ftype != stype)
1386 suf = " (type change)";
1387 else if (!quick_check_ok(ftype, fname, file, &sx.st))
1388 suf = always_checksum ? " (sum change)" : " (file change)";
1389 else if (!unchanged_attrs(fname, file, &sx))
1390 suf = " (attr change)";
1391 else
1392 suf = " (uptodate)";
1393 }
1394 rprintf(FINFO, "%s exists%s\n", fname, suf);
1395 }
1396 #ifdef SUPPORT_HARD_LINKS
1397 if (F_IS_HLINKED(file))
1398 handle_skipped_hlink(file, itemizing, code, f_out);
1399 #endif
1400 goto cleanup;
1401 }
1402
1403 fnamecmp = fname;
1404
1405 if (is_dir) {
1406 mode_t added_perms;
1407 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1408 goto cleanup;
1409 if (am_root < 0) {
1410 /* For --fake-super, the dir must be useable by the copying
1411 * user, just like it would be for root. */
1412 added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1413 } else
1414 added_perms = 0;
1415 if (is_dir < 0) {
1416 if (!preserve_mtimes || omit_dir_times)
1417 goto cleanup;
1418 /* In inc_recurse mode we want to make sure any missing
1419 * directories get created while we're still processing
1420 * the parent dir (which allows us to touch the parent
1421 * dir's mtime right away). We will handle the dir in
1422 * full later (right before we handle its contents). */
1423 if (statret == 0
1424 && (stype == FT_DIR
1425 || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1426 goto cleanup; /* Any errors get reported later. */
1427 if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1428 file->flags |= FLAG_DIR_CREATED;
1429 goto cleanup;
1430 }
1431 /* The file to be received is a directory, so we need
1432 * to prepare appropriately. If there is already a
1433 * file of that name and it is *not* a directory, then
1434 * we need to delete it. If it doesn't exist, then
1435 * (perhaps recursively) create it. */
1436 if (statret == 0 && stype != FT_DIR) {
1437 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1438 goto skipping_dir_contents;
1439 statret = -1;
1440 }
1441 if (dry_run && statret != 0) {
1442 if (!dry_missing_dir)
1443 dry_missing_dir = file;
1444 file->flags |= FLAG_MISSING_DIR;
1445 }
1446 init_stat_x(&real_sx);
1447 real_sx.st = sx.st;
1448 real_ret = statret;
1449 if (file->flags & FLAG_DIR_CREATED)
1450 statret = -1;
1451 if (!preserve_perms) { /* See comment in non-dir code below. */
1452 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, statret == 0);
1453 }
1454 if (statret != 0 && basis_dir[0] != NULL) {
1455 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1456 if (j == -2) {
1457 itemizing = 0;
1458 code = FNONE;
1459 statret = 1;
1460 } else if (j >= 0) {
1461 statret = 1;
1462 fnamecmp = fnamecmpbuf;
1463 }
1464 }
1465 if (itemizing && f_out != -1) {
1466 itemize(fnamecmp, file, ndx, statret, &sx,
1467 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1468 }
1469 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1470 if (!relative_paths || errno != ENOENT
1471 || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1472 || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1473 rsyserr(FERROR_XFER, errno,
1474 "recv_generator: mkdir %s failed",
1475 full_fname(fname));
1476 skipping_dir_contents:
1477 rprintf(FERROR, "*** Skipping any contents from this failed directory ***\n");
1478 skip_dir = file;
1479 file->flags |= FLAG_MISSING_DIR;
1480 goto cleanup;
1481 }
1482 }
1483
1484 #ifdef SUPPORT_XATTRS
1485 if (preserve_xattrs && statret == 1)
1486 copy_xattrs(fnamecmpbuf, fname);
1487 #endif
1488 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1489 && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1490 rprintf(code, "%s/\n", fname);
1491
1492 /* We need to ensure that the dirs in the transfer have both
1493 * readable and writable permissions during the time we are
1494 * putting files within them. This is then restored to the
1495 * former permissions after the transfer is done. */
1496 #ifdef HAVE_CHMOD
1497 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1498 mode_t mode = file->mode | S_IRWXU;
1499 if (do_chmod(fname, mode) < 0) {
1500 rsyserr(FERROR_XFER, errno,
1501 "failed to modify permissions on %s",
1502 full_fname(fname));
1503 }
1504 need_retouch_dir_perms = 1;
1505 }
1506 #endif
1507
1508 if (real_ret != 0 && one_file_system)
1509 real_sx.st.st_dev = filesystem_dev;
1510 if (inc_recurse) {
1511 if (one_file_system) {
1512 uint32 *devp = F_DIR_DEV_P(file);
1513 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1514 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1515 }
1516 }
1517 else if (delete_during && f_out != -1 && !phase
1518 && !(file->flags & FLAG_MISSING_DIR)) {
1519 if (file->flags & FLAG_CONTENT_DIR)
1520 delete_in_dir(fname, file, real_sx.st.st_dev);
1521 else
1522 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1523 }
1524 prior_dir_file = file;
1525 goto cleanup;
1526 }
1527
1528 /* If we're not preserving permissions, change the file-list's
1529 * mode based on the local permissions and some heuristics. */
1530 if (!preserve_perms) {
1531 int exists = statret == 0 && stype != FT_DIR;
1532 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, exists);
1533 }
1534
1535 #ifdef SUPPORT_HARD_LINKS
1536 if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1537 && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1538 goto cleanup;
1539 #endif
1540
1541 if (preserve_links && ftype == FT_SYMLINK) {
1542 #ifdef SUPPORT_LINKS
1543 const char *sl = F_SYMLINK(file);
1544 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1545 if (INFO_GTE(NAME, 1)) {
1546 if (solo_file) {
1547 /* fname contains the destination path, but we
1548 * want to report the source path. */
1549 fname = f_name(file, NULL);
1550 }
1551 rprintf(FINFO,
1552 "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1553 fname, sl);
1554 }
1555 goto cleanup;
1556 }
1557 if (statret == 0) {
1558 if (stype == FT_SYMLINK && quick_check_ok(stype, fname, file, &sx.st)) {
1559 /* The link is pointing to the right place. */
1560 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1561 if (itemizing)
1562 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1563 #ifdef SUPPORT_HARD_LINKS
1564 if (preserve_hard_links && F_IS_HLINKED(file))
1565 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1566 #endif
1567 if (remove_source_files == 1)
1568 goto return_with_success;
1569 goto cleanup;
1570 }
1571 } else if (basis_dir[0] != NULL) {
1572 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1573 if (j == -2) {
1574 #ifndef CAN_HARDLINK_SYMLINK
1575 if (alt_dest_type == LINK_DEST) {
1576 /* Resort to --copy-dest behavior. */
1577 } else
1578 #endif
1579 if (alt_dest_type != COPY_DEST)
1580 goto cleanup;
1581 itemizing = 0;
1582 code = FNONE;
1583 } else if (j >= 0) {
1584 statret = 1;
1585 fnamecmp = fnamecmpbuf;
1586 }
1587 }
1588 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1589 set_file_attrs(fname, file, NULL, NULL, 0);
1590 if (itemizing) {
1591 if (statret == 0 && stype != FT_SYMLINK)
1592 statret = -1;
1593 itemize(fnamecmp, file, ndx, statret, &sx,
1594 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1595 }
1596 if (code != FNONE && INFO_GTE(NAME, 1))
1597 rprintf(code, "%s -> %s\n", fname, sl);
1598 #ifdef SUPPORT_HARD_LINKS
1599 if (preserve_hard_links && F_IS_HLINKED(file))
1600 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1601 #endif
1602 /* This does not check remove_source_files == 1
1603 * because this is one of the items that the old
1604 * --remove-sent-files option would remove. */
1605 if (remove_source_files)
1606 goto return_with_success;
1607 }
1608 #endif
1609 goto cleanup;
1610 }
1611
1612 if ((am_root && preserve_devices && ftype == FT_DEVICE)
1613 || (preserve_specials && ftype == FT_SPECIAL)) {
1614 dev_t rdev;
1615 int del_for_flag;
1616 if (ftype == FT_DEVICE) {
1617 uint32 *devp = F_RDEV_P(file);
1618 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1619 del_for_flag = DEL_FOR_DEVICE;
1620 } else {
1621 rdev = 0;
1622 del_for_flag = DEL_FOR_SPECIAL;
1623 }
1624 if (statret == 0) {
1625 if (ftype != stype)
1626 statret = -1;
1627 else if (quick_check_ok(ftype, fname, file, &sx.st)) {
1628 /* The device or special file is identical. */
1629 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1630 if (itemizing)
1631 itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1632 #ifdef SUPPORT_HARD_LINKS
1633 if (preserve_hard_links && F_IS_HLINKED(file))
1634 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1635 #endif
1636 if (remove_source_files == 1)
1637 goto return_with_success;
1638 goto cleanup;
1639 }
1640 } else if (basis_dir[0] != NULL) {
1641 int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1642 if (j == -2) {
1643 #ifndef CAN_HARDLINK_SPECIAL
1644 if (alt_dest_type == LINK_DEST) {
1645 /* Resort to --copy-dest behavior. */
1646 } else
1647 #endif
1648 if (alt_dest_type != COPY_DEST)
1649 goto cleanup;
1650 itemizing = 0;
1651 code = FNONE;
1652 } else if (j >= 0) {
1653 statret = 1;
1654 fnamecmp = fnamecmpbuf;
1655 }
1656 }
1657 if (DEBUG_GTE(GENR, 1)) {
1658 rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1659 fname, (int)file->mode,
1660 (long)major(rdev), (long)minor(rdev));
1661 }
1662 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1663 set_file_attrs(fname, file, NULL, NULL, 0);
1664 if (itemizing) {
1665 itemize(fnamecmp, file, ndx, statret, &sx,
1666 ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1667 }
1668 if (code != FNONE && INFO_GTE(NAME, 1))
1669 rprintf(code, "%s\n", fname);
1670 #ifdef SUPPORT_HARD_LINKS
1671 if (preserve_hard_links && F_IS_HLINKED(file))
1672 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1673 #endif
1674 if (remove_source_files == 1)
1675 goto return_with_success;
1676 }
1677 goto cleanup;
1678 }
1679
1680 if (ftype != FT_REG) {
1681 if (INFO_GTE(NONREG, 1)) {
1682 if (solo_file)
1683 fname = f_name(file, NULL);
1684 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1685 }
1686 goto cleanup;
1687 }
1688
1689 if (max_size >= 0 && F_LENGTH(file) > max_size) {
1690 if (INFO_GTE(SKIP, 1)) {
1691 if (solo_file)
1692 fname = f_name(file, NULL);
1693 rprintf(FINFO, "%s is over max-size\n", fname);
1694 }
1695 goto cleanup;
1696 }
1697 if (min_size >= 0 && F_LENGTH(file) < min_size) {
1698 if (INFO_GTE(SKIP, 1)) {
1699 if (solo_file)
1700 fname = f_name(file, NULL);
1701 rprintf(FINFO, "%s is under min-size\n", fname);
1702 }
1703 goto cleanup;
1704 }
1705
1706 if (update_only > 0 && statret == 0 && file->modtime - sx.st.st_mtime < modify_window) {
1707 if (INFO_GTE(SKIP, 1))
1708 rprintf(FINFO, "%s is newer\n", fname);
1709 #ifdef SUPPORT_HARD_LINKS
1710 if (F_IS_HLINKED(file))
1711 handle_skipped_hlink(file, itemizing, code, f_out);
1712 #endif
1713 goto cleanup;
1714 }
1715
1716 fnamecmp_type = FNAMECMP_FNAME;
1717
1718 if (statret == 0 && !(stype == FT_REG || (write_devices && stype == FT_DEVICE))) {
1719 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1720 goto cleanup;
1721 statret = -1;
1722 stat_errno = ENOENT;
1723 }
1724
1725 if (basis_dir[0] != NULL && (statret != 0 || alt_dest_type != COPY_DEST)) {
1726 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx, statret == 0, itemizing, code);
1727 if (j == -2) {
1728 if (remove_source_files == 1)
1729 goto return_with_success;
1730 goto cleanup;
1731 }
1732 if (j >= 0) {
1733 fnamecmp = fnamecmpbuf;
1734 fnamecmp_type = j;
1735 statret = 0;
1736 }
1737 }
1738
1739 init_stat_x(&real_sx);
1740 real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1741 real_ret = statret;
1742
1743 if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1744 && link_stat(partialptr, &partial_st, 0) == 0
1745 && S_ISREG(partial_st.st_mode)) {
1746 if (statret != 0)
1747 goto prepare_to_open;
1748 } else
1749 partialptr = NULL;
1750
1751 if (statret != 0 && fuzzy_basis) {
1752 if (need_fuzzy_dirlist) {
1753 const char *dn = file->dirname ? file->dirname : ".";
1754 int i;
1755 strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1756 for (i = 0; i < fuzzy_basis; i++) {
1757 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1758 continue;
1759 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES | GDL_PERHAPS_DIR);
1760 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1761 flist_free(fuzzy_dirlist[i]);
1762 fuzzy_dirlist[i] = NULL;
1763 }
1764 }
1765 need_fuzzy_dirlist = 0;
1766 }
1767
1768 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1769 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1770 if (fuzzy_file) {
1771 f_name(fuzzy_file, fnamecmpbuf);
1772 if (DEBUG_GTE(FUZZY, 1)) {
1773 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1774 fname, fnamecmpbuf);
1775 }
1776 sx.st.st_size = F_LENGTH(fuzzy_file);
1777 statret = 0;
1778 fnamecmp = fnamecmpbuf;
1779 }
1780 }
1781
1782 if (statret != 0) {
1783 #ifdef SUPPORT_HARD_LINKS
1784 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1785 cur_flist->in_progress++;
1786 goto cleanup;
1787 }
1788 #endif
1789 if (stat_errno == ENOENT)
1790 goto notify_others;
1791 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1792 full_fname(fname));
1793 goto cleanup;
1794 }
1795
1796 if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1797 ;
1798 else if (fnamecmp_type >= FNAMECMP_FUZZY)
1799 ;
1800 else if (quick_check_ok(FT_REG, fnamecmp, file, &sx.st)) {
1801 if (partialptr) {
1802 do_unlink(partialptr);
1803 handle_partial_dir(partialptr, PDIR_DELETE);
1804 }
1805 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT | maybe_ATTRS_ACCURATE_TIME);
1806 if (itemizing)
1807 itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1808 #ifdef SUPPORT_HARD_LINKS
1809 if (preserve_hard_links && F_IS_HLINKED(file))
1810 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1811 #endif
1812 if (remove_source_files != 1)
1813 goto cleanup;
1814 return_with_success:
1815 if (!dry_run)
1816 send_msg_int(MSG_SUCCESS, ndx);
1817 goto cleanup;
1818 }
1819
1820 if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1821 #ifdef SUPPORT_HARD_LINKS
1822 if (F_IS_HLINKED(file))
1823 handle_skipped_hlink(file, itemizing, code, f_out);
1824 #endif
1825 goto cleanup;
1826 }
1827
1828 prepare_to_open:
1829 if (partialptr) {
1830 sx.st = partial_st;
1831 fnamecmp = partialptr;
1832 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1833 statret = 0;
1834 }
1835
1836 if (!do_xfers)
1837 goto notify_others;
1838
1839 if (read_batch || whole_file) {
1840 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1841 if (!(backupptr = get_backup_name(fname)))
1842 goto cleanup;
1843 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1844 goto pretend_missing;
1845 if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1846 unmake_file(back_file);
1847 back_file = NULL;
1848 goto cleanup;
1849 }
1850 }
1851 goto notify_others;
1852 }
1853
1854 if (fuzzy_dirlist[0]) {
1855 int j = flist_find(fuzzy_dirlist[0], file);
1856 if (j >= 0) /* don't use changing file as future fuzzy basis */
1857 fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1858 }
1859
1860 /* open the file */
1861 if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1862 rsyserr(FERROR, errno, "failed to open %s, continuing",
1863 full_fname(fnamecmp));
1864 pretend_missing:
1865 /* pretend the file didn't exist */
1866 #ifdef SUPPORT_HARD_LINKS
1867 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1868 cur_flist->in_progress++;
1869 goto cleanup;
1870 }
1871 #endif
1872 statret = real_ret = -1;
1873 goto notify_others;
1874 }
1875
1876 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1877 if (!(backupptr = get_backup_name(fname))) {
1878 close(fd);
1879 goto cleanup;
1880 }
1881 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1882 close(fd);
1883 goto pretend_missing;
1884 }
1885 if (robust_unlink(backupptr) && errno != ENOENT) {
1886 rsyserr(FERROR_XFER, errno, "unlink %s",
1887 full_fname(backupptr));
1888 unmake_file(back_file);
1889 back_file = NULL;
1890 close(fd);
1891 goto cleanup;
1892 }
1893 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1894 rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1895 unmake_file(back_file);
1896 back_file = NULL;
1897 close(fd);
1898 goto cleanup;
1899 }
1900 fnamecmp_type = FNAMECMP_BACKUP;
1901 }
1902
1903 if (DEBUG_GTE(DELTASUM, 3)) {
1904 rprintf(FINFO, "gen mapped %s of size %s\n",
1905 fnamecmp, big_num(sx.st.st_size));
1906 }
1907
1908 if (DEBUG_GTE(DELTASUM, 2))
1909 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1910
1911 notify_others:
1912 if (remove_source_files && !delay_updates && !phase && !dry_run)
1913 increment_active_files(ndx, itemizing, code);
1914 if (inc_recurse && (!dry_run || write_batch < 0))
1915 cur_flist->in_progress++;
1916 #ifdef SUPPORT_HARD_LINKS
1917 if (preserve_hard_links && F_IS_HLINKED(file))
1918 file->flags |= FLAG_FILE_SENT;
1919 #endif
1920 write_ndx(f_out, ndx);
1921 if (itemizing) {
1922 int iflags = ITEM_TRANSFER;
1923 if (always_checksum > 0)
1924 iflags |= ITEM_REPORT_CHANGE;
1925 if (fnamecmp_type != FNAMECMP_FNAME)
1926 iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1927 if (fnamecmp_type >= FNAMECMP_FUZZY)
1928 iflags |= ITEM_XNAME_FOLLOWS;
1929 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1930 fuzzy_file ? fuzzy_file->basename : NULL);
1931 free_stat_x(&real_sx);
1932 }
1933
1934 if (!do_xfers) {
1935 #ifdef SUPPORT_HARD_LINKS
1936 if (preserve_hard_links && F_IS_HLINKED(file))
1937 finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1938 #endif
1939 goto cleanup;
1940 }
1941 if (read_batch)
1942 goto cleanup;
1943
1944 if (statret != 0 || whole_file)
1945 write_sum_head(f_out, NULL);
1946 else if (sx.st.st_size <= 0) {
1947 write_sum_head(f_out, NULL);
1948 close(fd);
1949 } else {
1950 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1951 rprintf(FWARNING,
1952 "WARNING: file is too large for checksum sending: %s\n",
1953 fnamecmp);
1954 write_sum_head(f_out, NULL);
1955 }
1956 close(fd);
1957 }
1958
1959 cleanup:
1960 if (back_file) {
1961 int save_preserve_xattrs = preserve_xattrs;
1962 if (f_copy >= 0)
1963 close(f_copy);
1964 #ifdef SUPPORT_XATTRS
1965 if (preserve_xattrs) {
1966 copy_xattrs(fname, backupptr);
1967 preserve_xattrs = 0;
1968 }
1969 #endif
1970 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1971 preserve_xattrs = save_preserve_xattrs;
1972 if (INFO_GTE(BACKUP, 1)) {
1973 rprintf(FINFO, "backed up %s to %s\n",
1974 fname, backupptr);
1975 }
1976 unmake_file(back_file);
1977 }
1978
1979 free_stat_x(&sx);
1980 }
1981
1982 /* If we are replacing an existing hard link, symlink, device, or special file,
1983 * create a temp-name item and rename it into place. A symlimk specifies slnk,
1984 * a hard link specifies hlnk, otherwise we create a device based on rdev.
1985 * Specify 0 for the del_for_flag if there is not a file to replace. This
1986 * returns 1 on success and 0 on failure. */
1987 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1988 dev_t rdev, stat_x *sxp, int del_for_flag)
1989 {
1990 char tmpname[MAXPATHLEN];
1991 const char *create_name;
1992 int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1993
1994 if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1995 skip_atomic = 1;
1996 else
1997 skip_atomic = 0;
1998
1999 if (del_for_flag) {
2000 if (make_backups > 0 && !dir_in_the_way) {
2001 if (!make_backup(fname, skip_atomic))
2002 return 0;
2003 } else if (skip_atomic) {
2004 int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
2005 if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
2006 return 0;
2007 }
2008 }
2009
2010 create_name = skip_atomic ? fname : tmpname;
2011
2012 if (slnk) {
2013 #ifdef SUPPORT_LINKS
2014 if (do_symlink(slnk, create_name) < 0) {
2015 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
2016 full_fname(create_name), slnk);
2017 return 0;
2018 }
2019 #else
2020 return 0;
2021 #endif
2022 } else if (hlnk) {
2023 #ifdef SUPPORT_HARD_LINKS
2024 if (!hard_link_one(file, create_name, hlnk, 0))
2025 return 0;
2026 #else
2027 return 0;
2028 #endif
2029 } else {
2030 if (do_mknod(create_name, file->mode, rdev) < 0) {
2031 rsyserr(FERROR_XFER, errno, "mknod %s failed",
2032 full_fname(create_name));
2033 return 0;
2034 }
2035 }
2036
2037 if (!skip_atomic) {
2038 if (do_rename(tmpname, fname) < 0) {
2039 rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
2040 full_fname(tmpname), full_fname(fname));
2041 do_unlink(tmpname);
2042 return 0;
2043 }
2044 }
2045
2046 return 1;
2047 }
2048
2049 #ifdef SUPPORT_HARD_LINKS
2050 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2051 enum logcode code, int f_out)
2052 {
2053 char fbuf[MAXPATHLEN];
2054 int new_last_ndx;
2055 struct file_list *save_flist = cur_flist;
2056
2057 /* If we skip the last item in a chain of links and there was a
2058 * prior non-skipped hard-link waiting to finish, finish it now. */
2059 if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2060 return;
2061
2062 file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2063 cur_flist->in_progress--; /* undo prior increment */
2064 f_name(file, fbuf);
2065 recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2066
2067 cur_flist = save_flist;
2068 }
2069 #endif
2070
2071 static void touch_up_dirs(struct file_list *flist, int ndx)
2072 {
2073 static int counter = 0;
2074 struct file_struct *file;
2075 char *fname;
2076 BOOL fix_dir_perms;
2077 int i, start, end;
2078
2079 if (ndx < 0) {
2080 start = 0;
2081 end = flist->used - 1;
2082 } else
2083 start = end = ndx;
2084
2085 /* Fix any directory permissions that were modified during the
2086 * transfer and/or re-set any tweaked modified-time values. */
2087 for (i = start; i <= end; i++, counter++) {
2088 file = flist->files[i];
2089 if (!F_IS_ACTIVE(file))
2090 continue;
2091 if (!S_ISDIR(file->mode)
2092 || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2093 continue;
2094 if (DEBUG_GTE(TIME, 2)) {
2095 fname = f_name(file, NULL);
2096 rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2097 NS(fname), i);
2098 }
2099 /* Be sure not to retouch permissions with --fake-super. */
2100 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2101 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2102 continue;
2103 fname = f_name(file, NULL);
2104 if (fix_dir_perms)
2105 do_chmod(fname, file->mode);
2106 if (need_retouch_dir_times) {
2107 STRUCT_STAT st;
2108 if (link_stat(fname, &st, 0) == 0 && mtime_differs(&st, file)) {
2109 st.st_mtime = file->modtime;
2110 #ifdef ST_MTIME_NSEC
2111 st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file);
2112 #endif
2113 set_times(fname, &st);
2114 }
2115 }
2116 if (counter >= loopchk_limit) {
2117 if (allowed_lull)
2118 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2119 else
2120 maybe_flush_socket(0);
2121 counter = 0;
2122 }
2123 }
2124 }
2125
2126 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2127 {
2128 struct file_struct *file;
2129 struct file_list *flist;
2130 char fbuf[MAXPATHLEN];
2131 int ndx;
2132
2133 while (1) {
2134 #ifdef SUPPORT_HARD_LINKS
2135 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2136 int send_failed = (ndx == -2);
2137 if (send_failed)
2138 ndx = get_hlink_num();
2139 flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2140 file = flist->files[ndx - flist->ndx_start];
2141 assert(file->flags & FLAG_HLINKED);
2142 if (send_failed)
2143 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2144 else
2145 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2146 flist->in_progress--;
2147 continue;
2148 }
2149 #endif
2150
2151 if (check_redo && (ndx = get_redo_num()) != -1) {
2152 OFF_T save_max_size = max_size;
2153 OFF_T save_min_size = min_size;
2154 csum_length = SUM_LENGTH;
2155 max_size = -1;
2156 min_size = -1;
2157 ignore_existing = -ignore_existing;
2158 ignore_non_existing = -ignore_non_existing;
2159 update_only = -update_only;
2160 always_checksum = -always_checksum;
2161 size_only = -size_only;
2162 append_mode = -append_mode;
2163 make_backups = -make_backups; /* avoid dup backup w/inplace */
2164 ignore_times++;
2165
2166 flist = cur_flist;
2167 cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2168
2169 file = cur_flist->files[ndx - cur_flist->ndx_start];
2170 if (solo_file)
2171 strlcpy(fbuf, solo_file, sizeof fbuf);
2172 else
2173 f_name(file, fbuf);
2174 recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2175 cur_flist->to_redo--;
2176
2177 cur_flist = flist;
2178
2179 csum_length = SHORT_SUM_LENGTH;
2180 max_size = save_max_size;
2181 min_size = save_min_size;
2182 ignore_existing = -ignore_existing;
2183 ignore_non_existing = -ignore_non_existing;
2184 update_only = -update_only;
2185 always_checksum = -always_checksum;
2186 size_only = -size_only;
2187 append_mode = -append_mode;
2188 make_backups = -make_backups;
2189 ignore_times--;
2190 continue;
2191 }
2192
2193 if (cur_flist == first_flist)
2194 break;
2195
2196 /* We only get here if inc_recurse is enabled. */
2197 if (first_flist->in_progress || first_flist->to_redo)
2198 break;
2199
2200 write_ndx(sock_f_out, NDX_DONE);
2201 if (!read_batch && !flist_eof) {
2202 int old_total = 0;
2203 for (flist = first_flist; flist != cur_flist; flist = flist->next)
2204 old_total += flist->used;
2205 maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2206 }
2207
2208 if (delete_during == 2 || !dir_tweaking) {
2209 /* Skip directory touch-up. */
2210 } else if (first_flist->parent_ndx >= 0)
2211 touch_up_dirs(dir_flist, first_flist->parent_ndx);
2212
2213 flist_free(first_flist); /* updates first_flist */
2214 }
2215 }
2216
2217 void generate_files(int f_out, const char *local_name)
2218 {
2219 int i, ndx, next_loopchk = 0;
2220 char fbuf[MAXPATHLEN];
2221 int itemizing;
2222 enum logcode code;
2223 int save_info_flist = info_levels[INFO_FLIST];
2224 int save_info_progress = info_levels[INFO_PROGRESS];
2225
2226 if (protocol_version >= 29) {
2227 itemizing = 1;
2228 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2229 code = logfile_format_has_i ? FNONE : FLOG;
2230 } else if (am_daemon) {
2231 itemizing = logfile_format_has_i && do_xfers;
2232 maybe_ATTRS_REPORT = ATTRS_REPORT;
2233 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2234 } else if (!am_server) {
2235 itemizing = stdout_format_has_i;
2236 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2237 code = itemizing ? FNONE : FINFO;
2238 } else {
2239 itemizing = 0;
2240 maybe_ATTRS_REPORT = ATTRS_REPORT;
2241 code = FINFO;
2242 }
2243 solo_file = local_name;
2244 dir_tweaking = !(list_only || solo_file || dry_run);
2245 need_retouch_dir_times = preserve_mtimes && !omit_dir_times;
2246 loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2247 symlink_timeset_failed_flags = ITEM_REPORT_TIME
2248 | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2249 implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2250
2251 if (DEBUG_GTE(GENR, 1))
2252 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2253
2254 if (delete_before && !solo_file && cur_flist->used > 0)
2255 do_delete_pass();
2256 if (delete_during == 2) {
2257 deldelay_size = BIGPATHBUFLEN * 4;
2258 deldelay_buf = new_array(char, deldelay_size);
2259 }
2260 info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2261
2262 if (append_mode > 0 || whole_file < 0)
2263 whole_file = 0;
2264 if (DEBUG_GTE(FLIST, 1)) {
2265 rprintf(FINFO, "delta-transmission %s\n",
2266 whole_file
2267 ? "disabled for local transfer or --whole-file"
2268 : "enabled");
2269 }
2270
2271 dflt_perms = (ACCESSPERMS & ~orig_umask);
2272
2273 do {
2274 #ifdef SUPPORT_HARD_LINKS
2275 if (preserve_hard_links && inc_recurse) {
2276 while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2277 wait_for_receiver();
2278 }
2279 #endif
2280
2281 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2282 struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2283 if (solo_file)
2284 strlcpy(fbuf, solo_file, sizeof fbuf);
2285 else
2286 f_name(fp, fbuf);
2287 ndx = cur_flist->ndx_start - 1;
2288 recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2289 if (delete_during && dry_run < 2 && !list_only
2290 && !(fp->flags & FLAG_MISSING_DIR)) {
2291 if (fp->flags & FLAG_CONTENT_DIR) {
2292 dev_t dirdev;
2293 if (one_file_system) {
2294 uint32 *devp = F_DIR_DEV_P(fp);
2295 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2296 } else
2297 dirdev = MAKEDEV(0, 0);
2298 delete_in_dir(fbuf, fp, dirdev);
2299 } else
2300 change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2301 }
2302 }
2303 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2304 struct file_struct *file = cur_flist->sorted[i];
2305
2306 if (!F_IS_ACTIVE(file))
2307 continue;
2308
2309 if (unsort_ndx)
2310 ndx = F_NDX(file);
2311 else
2312 ndx = i + cur_flist->ndx_start;
2313
2314 if (solo_file)
2315 strlcpy(fbuf, solo_file, sizeof fbuf);
2316 else
2317 f_name(file, fbuf);
2318 recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2319
2320 check_for_finished_files(itemizing, code, 0);
2321
2322 if (i + cur_flist->ndx_start >= next_loopchk) {
2323 if (allowed_lull)
2324 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2325 else
2326 maybe_flush_socket(0);
2327 next_loopchk += loopchk_limit;
2328 }
2329 }
2330
2331 if (!inc_recurse) {
2332 write_ndx(f_out, NDX_DONE);
2333 break;
2334 }
2335
2336 while (1) {
2337 check_for_finished_files(itemizing, code, 1);
2338 if (cur_flist->next || flist_eof)
2339 break;
2340 wait_for_receiver();
2341 }
2342 } while ((cur_flist = cur_flist->next) != NULL);
2343
2344 if (delete_during)
2345 delete_in_dir(NULL, NULL, dev_zero);
2346 phase++;
2347 if (DEBUG_GTE(GENR, 1))
2348 rprintf(FINFO, "generate_files phase=%d\n", phase);
2349
2350 while (1) {
2351 check_for_finished_files(itemizing, code, 1);
2352 if (msgdone_cnt)
2353 break;
2354 wait_for_receiver();
2355 }
2356
2357 phase++;
2358 if (DEBUG_GTE(GENR, 1))
2359 rprintf(FINFO, "generate_files phase=%d\n", phase);
2360
2361 write_ndx(f_out, NDX_DONE);
2362
2363 /* Reduce round-trip lag-time for a useless delay-updates phase. */
2364 if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2365 write_ndx(f_out, NDX_DONE);
2366
2367 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2368 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2369 write_del_stats(f_out);
2370 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2371 write_ndx(f_out, NDX_DONE);
2372 }
2373
2374 /* Read MSG_DONE for the redo phase (and any prior messages). */
2375 while (1) {
2376 check_for_finished_files(itemizing, code, 0);
2377 if (msgdone_cnt > 1)
2378 break;
2379 wait_for_receiver();
2380 }
2381
2382 if (protocol_version >= 29) {
2383 phase++;
2384 if (DEBUG_GTE(GENR, 1))
2385 rprintf(FINFO, "generate_files phase=%d\n", phase);
2386 if (!EARLY_DELAY_DONE_MSG()) {
2387 write_ndx(f_out, NDX_DONE);
2388 if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2389 write_ndx(f_out, NDX_DONE);
2390 }
2391 /* Read MSG_DONE for delay-updates phase & prior messages. */
2392 while (msgdone_cnt == 2)
2393 wait_for_receiver();
2394 }
2395
2396 info_levels[INFO_FLIST] = save_info_flist;
2397 info_levels[INFO_PROGRESS] = save_info_progress;
2398
2399 if (delete_during == 2)
2400 do_delayed_deletions(fbuf);
2401 if (delete_after && !solo_file && file_total > 0)
2402 do_delete_pass();
2403
2404 if (max_delete >= 0 && skipped_deletes) {
2405 rprintf(FWARNING,
2406 "Deletions stopped due to --max-delete limit (%d skipped)\n",
2407 skipped_deletes);
2408 io_error |= IOERR_DEL_LIMIT;
2409 }
2410
2411 if (protocol_version >= 31) {
2412 if (!EARLY_DELETE_DONE_MSG()) {
2413 if (INFO_GTE(STATS, 2) || read_batch)
2414 write_del_stats(f_out);
2415 write_ndx(f_out, NDX_DONE);
2416 }
2417
2418 /* Read MSG_DONE for late-delete phase & prior messages. */
2419 while (msgdone_cnt == 3)
2420 wait_for_receiver();
2421 }
2422
2423 if ((need_retouch_dir_perms || need_retouch_dir_times)
2424 && dir_tweaking && (!inc_recurse || delete_during == 2))
2425 touch_up_dirs(dir_flist, -1);
2426
2427 if (DEBUG_GTE(GENR, 1))
2428 rprintf(FINFO, "generate_files finished\n");
2429 }
Mirror of https://github.com/WayneD/rsync.git