Add parent-dir validation for --no-inc-recurse too.
[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) 2003-2014 Wayne Davison
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 3 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License along
20  * with this program; if not, visit the http://fsf.org website.
21  */
22
23 #include "rsync.h"
24 #include "inums.h"
25 #include "ifuncs.h"
26
27 extern int dry_run;
28 extern int do_xfers;
29 extern int stdout_format_has_i;
30 extern int logfile_format_has_i;
31 extern int am_root;
32 extern int am_server;
33 extern int am_daemon;
34 extern int inc_recurse;
35 extern int relative_paths;
36 extern int implied_dirs;
37 extern int keep_dirlinks;
38 extern int preserve_acls;
39 extern int preserve_xattrs;
40 extern int preserve_links;
41 extern int preserve_devices;
42 extern int preserve_specials;
43 extern int preserve_hard_links;
44 extern int preserve_executability;
45 extern int preserve_perms;
46 extern int preserve_times;
47 extern int delete_mode;
48 extern int delete_before;
49 extern int delete_during;
50 extern int delete_after;
51 extern int missing_args;
52 extern int msgdone_cnt;
53 extern int ignore_errors;
54 extern int remove_source_files;
55 extern int delay_updates;
56 extern int update_only;
57 extern int human_readable;
58 extern int ignore_existing;
59 extern int ignore_non_existing;
60 extern int want_xattr_optim;
61 extern int inplace;
62 extern int append_mode;
63 extern int make_backups;
64 extern int csum_length;
65 extern int ignore_times;
66 extern int size_only;
67 extern OFF_T max_size;
68 extern OFF_T min_size;
69 extern int io_error;
70 extern int flist_eof;
71 extern int allowed_lull;
72 extern int sock_f_out;
73 extern int protocol_version;
74 extern int file_total;
75 extern int fuzzy_basis;
76 extern int always_checksum;
77 extern int checksum_len;
78 extern char *partial_dir;
79 extern int compare_dest;
80 extern int copy_dest;
81 extern int link_dest;
82 extern int whole_file;
83 extern int list_only;
84 extern int read_batch;
85 extern int write_batch;
86 extern int safe_symlinks;
87 extern long block_size; /* "long" because popt can't set an int32. */
88 extern int unsort_ndx;
89 extern int max_delete;
90 extern int force_delete;
91 extern int one_file_system;
92 extern int skipped_deletes;
93 extern dev_t filesystem_dev;
94 extern mode_t orig_umask;
95 extern uid_t our_uid;
96 extern char *tmpdir;
97 extern char *basis_dir[MAX_BASIS_DIRS+1];
98 extern struct file_list *cur_flist, *first_flist, *dir_flist;
99 extern filter_rule_list filter_list, daemon_filter_list;
100
101 int maybe_ATTRS_REPORT = 0;
102
103 static dev_t dev_zero;
104 static int deldelay_size = 0, deldelay_cnt = 0;
105 static char *deldelay_buf = NULL;
106 static int deldelay_fd = -1;
107 static int loopchk_limit;
108 static int dir_tweaking;
109 static int symlink_timeset_failed_flags;
110 static int need_retouch_dir_times;
111 static int need_retouch_dir_perms;
112 static const char *solo_file = NULL;
113
114 enum nonregtype {
115     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
116 };
117
118 /* Forward declarations. */
119 #ifdef SUPPORT_HARD_LINKS
120 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
121                                  enum logcode code, int f_out);
122 #endif
123
124 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
125 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
126
127 static int start_delete_delay_temp(void)
128 {
129         char fnametmp[MAXPATHLEN];
130         int save_dry_run = dry_run;
131
132         dry_run = 0;
133         if (!get_tmpname(fnametmp, "deldelay", False)
134          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
135                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
136                         inc_recurse ? "" : " -- switching to --delete-after");
137                 delete_during = 0;
138                 delete_after = !inc_recurse;
139                 dry_run = save_dry_run;
140                 return 0;
141         }
142         unlink(fnametmp);
143         dry_run = save_dry_run;
144         return 1;
145 }
146
147 static int flush_delete_delay(void)
148 {
149         if (deldelay_fd < 0 && !start_delete_delay_temp())
150                 return 0;
151         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
152                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
153                 delete_during = 0;
154                 delete_after = !inc_recurse;
155                 close(deldelay_fd);
156                 return 0;
157         }
158         deldelay_cnt = 0;
159         return 1;
160 }
161
162 static int remember_delete(struct file_struct *file, const char *fname, int flags)
163 {
164         int len;
165
166         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
167                 return 0;
168
169         if (flags & DEL_NO_UID_WRITE)
170                 deldelay_buf[deldelay_cnt++] = '!';
171
172         while (1) {
173                 len = snprintf(deldelay_buf + deldelay_cnt,
174                                deldelay_size - deldelay_cnt,
175                                "%x %s%c",
176                                (int)file->mode, fname, '\0');
177                 if ((deldelay_cnt += len) <= deldelay_size)
178                         break;
179                 deldelay_cnt -= len;
180                 if (!flush_delete_delay())
181                         return 0;
182         }
183
184         return 1;
185 }
186
187 static int read_delay_line(char *buf, int *flags_p)
188 {
189         static int read_pos = 0;
190         int j, len, mode;
191         char *bp, *past_space;
192
193         while (1) {
194                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
195                 if (j < deldelay_cnt)
196                         break;
197                 if (deldelay_fd < 0) {
198                         if (j > read_pos)
199                                 goto invalid_data;
200                         return -1;
201                 }
202                 deldelay_cnt -= read_pos;
203                 if (deldelay_cnt == deldelay_size)
204                         goto invalid_data;
205                 if (deldelay_cnt && read_pos) {
206                         memmove(deldelay_buf, deldelay_buf + read_pos,
207                                 deldelay_cnt);
208                 }
209                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
210                            deldelay_size - deldelay_cnt);
211                 if (len == 0) {
212                         if (deldelay_cnt) {
213                                 rprintf(FERROR,
214                                     "ERROR: unexpected EOF in delete-delay file.\n");
215                         }
216                         return -1;
217                 }
218                 if (len < 0) {
219                         rsyserr(FERROR, errno,
220                                 "reading delete-delay file");
221                         return -1;
222                 }
223                 deldelay_cnt += len;
224                 read_pos = 0;
225         }
226
227         bp = deldelay_buf + read_pos;
228         if (*bp == '!') {
229                 bp++;
230                 *flags_p = DEL_NO_UID_WRITE;
231         } else
232                 *flags_p = 0;
233
234         if (sscanf(bp, "%x ", &mode) != 1) {
235           invalid_data:
236                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
237                 return -1;
238         }
239         past_space = strchr(bp, ' ') + 1;
240         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
241         read_pos = j + 1;
242
243         if (len > MAXPATHLEN) {
244                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
245                 return -1;
246         }
247
248         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
249          * instead of returning a pointer to our buffer. */
250         memcpy(buf, past_space, len);
251
252         return mode;
253 }
254
255 static void do_delayed_deletions(char *delbuf)
256 {
257         int mode, flags;
258
259         if (deldelay_fd >= 0) {
260                 if (deldelay_cnt && !flush_delete_delay())
261                         return;
262                 lseek(deldelay_fd, 0, 0);
263         }
264         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
265                 delete_item(delbuf, mode, flags | DEL_RECURSE);
266         if (deldelay_fd >= 0)
267                 close(deldelay_fd);
268 }
269
270 /* This function is used to implement per-directory deletion, and is used by
271  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
272  * MAXPATHLEN buffer with the name of the directory in it (the functions we
273  * call will append names onto the end, but the old dir value will be restored
274  * on exit). */
275 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
276 {
277         static int already_warned = 0;
278         struct file_list *dirlist;
279         char delbuf[MAXPATHLEN];
280         int dlen, i;
281
282         if (!fbuf) {
283                 change_local_filter_dir(NULL, 0, 0);
284                 return;
285         }
286
287         if (DEBUG_GTE(DEL, 2))
288                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
289
290         if (allowed_lull)
291                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
292
293         if (io_error & IOERR_GENERAL && !ignore_errors) {
294                 if (already_warned)
295                         return;
296                 rprintf(FINFO,
297                         "IO error encountered -- skipping file deletion\n");
298                 already_warned = 1;
299                 return;
300         }
301
302         dlen = strlen(fbuf);
303         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
304
305         if (one_file_system) {
306                 if (file->flags & FLAG_TOP_DIR)
307                         filesystem_dev = *fs_dev;
308                 else if (filesystem_dev != *fs_dev)
309                         return;
310         }
311
312         dirlist = get_dirlist(fbuf, dlen, 0);
313
314         /* If an item in dirlist is not found in flist, delete it
315          * from the filesystem. */
316         for (i = dirlist->used; i--; ) {
317                 struct file_struct *fp = dirlist->files[i];
318                 if (!F_IS_ACTIVE(fp))
319                         continue;
320                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
321                         if (INFO_GTE(MOUNT, 1))
322                                 rprintf(FINFO, "cannot delete mount point: %s\n",
323                                         f_name(fp, NULL));
324                         continue;
325                 }
326                 /* Here we want to match regardless of file type.  Replacement
327                  * of a file with one of another type is handled separately by
328                  * a delete_item call with a DEL_MAKE_ROOM flag. */
329                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
330                         int flags = DEL_RECURSE;
331                         if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
332                                 flags |= DEL_NO_UID_WRITE;
333                         f_name(fp, delbuf);
334                         if (delete_during == 2) {
335                                 if (!remember_delete(fp, delbuf, flags))
336                                         break;
337                         } else
338                                 delete_item(delbuf, fp->mode, flags);
339                 }
340         }
341
342         flist_free(dirlist);
343 }
344
345 /* This deletes any files on the receiving side that are not present on the
346  * sending side.  This is used by --delete-before and --delete-after. */
347 static void do_delete_pass(void)
348 {
349         char fbuf[MAXPATHLEN];
350         STRUCT_STAT st;
351         int j;
352
353         /* dry_run is incremented when the destination doesn't exist yet. */
354         if (dry_run > 1 || list_only)
355                 return;
356
357         for (j = 0; j < cur_flist->used; j++) {
358                 struct file_struct *file = cur_flist->sorted[j];
359
360                 if (!F_IS_ACTIVE(file))
361                         continue;
362
363                 f_name(file, fbuf);
364
365                 if (!(file->flags & FLAG_CONTENT_DIR)) {
366                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
367                         continue;
368                 }
369
370                 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
371                         rprintf(FINFO, "deleting in %s\n", fbuf);
372
373                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
374                  || !S_ISDIR(st.st_mode))
375                         continue;
376
377                 delete_in_dir(fbuf, file, &st.st_dev);
378         }
379         delete_in_dir(NULL, NULL, &dev_zero);
380
381         if (INFO_GTE(FLIST, 2) && !am_server)
382                 rprintf(FINFO, "                    \r");
383 }
384
385 static inline int time_differs(struct file_struct *file, stat_x *sxp)
386 {
387         return cmp_time(sxp->st.st_mtime, file->modtime);
388 }
389
390 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
391 {
392         if (preserve_perms)
393                 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
394
395         if (preserve_executability)
396                 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
397
398         return 0;
399 }
400
401 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
402 {
403         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
404                 return 1;
405
406         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
407                 return 1;
408
409         return 0;
410 }
411
412 #ifdef SUPPORT_ACLS
413 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
414 {
415         if (preserve_acls) {
416                 if (!ACL_READY(*sxp))
417                         get_acl(fname, sxp);
418                 if (set_acl(NULL, file, sxp, file->mode))
419                         return 1;
420         }
421
422         return 0;
423 }
424 #endif
425
426 #ifdef SUPPORT_XATTRS
427 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
428 {
429         if (preserve_xattrs) {
430                 if (!XATTR_READY(*sxp))
431                         get_xattr(fname, sxp);
432                 if (xattr_diff(file, sxp, 0))
433                         return 1;
434         }
435
436         return 0;
437 }
438 #endif
439
440 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
441 {
442         if (S_ISLNK(file->mode)) {
443 #ifdef CAN_SET_SYMLINK_TIMES
444                 if (preserve_times & PRESERVE_LINK_TIMES && time_differs(file, sxp))
445                         return 0;
446 #endif
447 #ifdef CAN_CHMOD_SYMLINK
448                 if (perms_differ(file, sxp))
449                         return 0;
450 #endif
451 #ifdef CAN_CHOWN_SYMLINK
452                 if (ownership_differs(file, sxp))
453                         return 0;
454 #endif
455 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
456                 if (acls_differ(fname, file, sxp))
457                         return 0;
458 #endif
459 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
460                 if (xattrs_differ(fname, file, sxp))
461                         return 0;
462 #endif
463         } else {
464                 if (preserve_times && time_differs(file, sxp))
465                         return 0;
466                 if (perms_differ(file, sxp))
467                         return 0;
468                 if (ownership_differs(file, sxp))
469                         return 0;
470 #ifdef SUPPORT_ACLS
471                 if (acls_differ(fname, file, sxp))
472                         return 0;
473 #endif
474 #ifdef SUPPORT_XATTRS
475                 if (xattrs_differ(fname, file, sxp))
476                         return 0;
477 #endif
478         }
479
480         return 1;
481 }
482
483 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
484              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
485              const char *xname)
486 {
487         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
488                 int keep_time = !preserve_times ? 0
489                     : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
490                     : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
491                     : 1;
492
493                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
494                         iflags |= ITEM_REPORT_SIZE;
495                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
496                         if (iflags & ITEM_LOCAL_CHANGE)
497                                 iflags |= symlink_timeset_failed_flags;
498                 } else if (keep_time
499                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
500                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
501                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
502                         iflags |= ITEM_REPORT_TIME;
503 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
504                 if (S_ISLNK(file->mode)) {
505                         ;
506                 } else
507 #endif
508                 if (preserve_perms) {
509                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
510                                 iflags |= ITEM_REPORT_PERMS;
511                 } else if (preserve_executability
512                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
513                         iflags |= ITEM_REPORT_PERMS;
514                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
515                         iflags |= ITEM_REPORT_OWNER;
516                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
517                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
518                         iflags |= ITEM_REPORT_GROUP;
519 #ifdef SUPPORT_ACLS
520                 if (preserve_acls && !S_ISLNK(file->mode)) {
521                         if (!ACL_READY(*sxp))
522                                 get_acl(fnamecmp, sxp);
523                         if (set_acl(NULL, file, sxp, file->mode))
524                                 iflags |= ITEM_REPORT_ACL;
525                 }
526 #endif
527 #ifdef SUPPORT_XATTRS
528                 if (preserve_xattrs) {
529                         if (!XATTR_READY(*sxp))
530                                 get_xattr(fnamecmp, sxp);
531                         if (xattr_diff(file, sxp, 1))
532                                 iflags |= ITEM_REPORT_XATTR;
533                 }
534 #endif
535         } else {
536 #ifdef SUPPORT_XATTRS
537                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
538                         iflags |= ITEM_REPORT_XATTR;
539 #endif
540                 iflags |= ITEM_IS_NEW;
541         }
542
543         iflags &= 0xffff;
544         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
545           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
546                 if (protocol_version >= 29) {
547                         if (ndx >= 0)
548                                 write_ndx(sock_f_out, ndx);
549                         write_shortint(sock_f_out, iflags);
550                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
551                                 write_byte(sock_f_out, fnamecmp_type);
552                         if (iflags & ITEM_XNAME_FOLLOWS)
553                                 write_vstring(sock_f_out, xname, strlen(xname));
554 #ifdef SUPPORT_XATTRS
555                         if (preserve_xattrs && do_xfers
556                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
557                                 int fd = iflags & ITEM_REPORT_XATTR
558                                       && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
559                                        ? sock_f_out : -1;
560                                 send_xattr_request(NULL, file, fd);
561                         }
562 #endif
563                 } else if (ndx >= 0) {
564                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
565                         log_item(code, file, iflags, xname);
566                 }
567         }
568 }
569
570
571 /* Perform our quick-check heuristic for determining if a file is unchanged. */
572 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
573 {
574         if (st->st_size != F_LENGTH(file))
575                 return 0;
576
577         /* if always checksum is set then we use the checksum instead
578            of the file time to determine whether to sync */
579         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
580                 char sum[MAX_DIGEST_LEN];
581                 file_checksum(fn, st, sum);
582                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
583         }
584
585         if (size_only > 0)
586                 return 1;
587
588         if (ignore_times)
589                 return 0;
590
591         return cmp_time(st->st_mtime, file->modtime) == 0;
592 }
593
594
595 /*
596  * set (initialize) the size entries in the per-file sum_struct
597  * calculating dynamic block and checksum sizes.
598  *
599  * This is only called from generate_and_send_sums() but is a separate
600  * function to encapsulate the logic.
601  *
602  * The block size is a rounded square root of file length.
603  *
604  * The checksum size is determined according to:
605  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
606  * provided by Donovan Baarda which gives a probability of rsync
607  * algorithm corrupting data and falling back using the whole md4
608  * checksums.
609  *
610  * This might be made one of several selectable heuristics.
611  */
612 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
613 {
614         int32 blength;
615         int s2length;
616         int64 l;
617
618         if (len < 0) {
619                 /* The file length overflowed our int64 var, so we can't process this file. */
620                 sum->count = -1; /* indicate overflow error */
621                 return;
622         }
623
624         if (block_size)
625                 blength = block_size;
626         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
627                 blength = BLOCK_SIZE;
628         else {
629                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
630                 int32 c;
631                 int cnt;
632                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
633                 if (c < 0 || c >= max_blength)
634                         blength = max_blength;
635                 else {
636                     blength = 0;
637                     do {
638                             blength |= c;
639                             if (len < (int64)blength * blength)
640                                     blength &= ~c;
641                             c >>= 1;
642                     } while (c >= 8);   /* round to multiple of 8 */
643                     blength = MAX(blength, BLOCK_SIZE);
644                 }
645         }
646
647         if (protocol_version < 27) {
648                 s2length = csum_length;
649         } else if (csum_length == SUM_LENGTH) {
650                 s2length = SUM_LENGTH;
651         } else {
652                 int32 c;
653                 int b = BLOCKSUM_BIAS;
654                 for (l = len; l >>= 1; b += 2) {}
655                 for (c = blength; (c >>= 1) && b; b--) {}
656                 /* add a bit, subtract rollsum, round up. */
657                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
658                 s2length = MAX(s2length, csum_length);
659                 s2length = MIN(s2length, SUM_LENGTH);
660         }
661
662         sum->flength    = len;
663         sum->blength    = blength;
664         sum->s2length   = s2length;
665         sum->remainder  = (int32)(len % blength);
666         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
667
668         if ((int64)sum->count != l)
669                 sum->count = -1;
670
671         if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
672                 rprintf(FINFO,
673                         "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
674                         big_num(sum->count), (long)sum->remainder, (long)sum->blength,
675                         sum->s2length, big_num(sum->flength));
676         }
677 }
678
679
680 /*
681  * Generate and send a stream of signatures/checksums that describe a buffer
682  *
683  * Generate approximately one checksum every block_len bytes.
684  */
685 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
686 {
687         int32 i;
688         struct map_struct *mapbuf;
689         struct sum_struct sum;
690         OFF_T offset = 0;
691
692         sum_sizes_sqroot(&sum, len);
693         if (sum.count < 0)
694                 return -1;
695         write_sum_head(f_out, &sum);
696
697         if (append_mode > 0 && f_copy < 0)
698                 return 0;
699
700         if (len > 0)
701                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
702         else
703                 mapbuf = NULL;
704
705         for (i = 0; i < sum.count; i++) {
706                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
707                 char *map = map_ptr(mapbuf, offset, n1);
708                 char sum2[SUM_LENGTH];
709                 uint32 sum1;
710
711                 len -= n1;
712                 offset += n1;
713
714                 if (f_copy >= 0) {
715                         full_write(f_copy, map, n1);
716                         if (append_mode > 0)
717                                 continue;
718                 }
719
720                 sum1 = get_checksum1(map, n1);
721                 get_checksum2(map, n1, sum2);
722
723                 if (DEBUG_GTE(DELTASUM, 3)) {
724                         rprintf(FINFO,
725                                 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
726                                 big_num(i), big_num(offset - n1), (long)n1,
727                                 (unsigned long)sum1);
728                 }
729                 write_int(f_out, sum1);
730                 write_buf(f_out, sum2, sum.s2length);
731         }
732
733         if (mapbuf)
734                 unmap_file(mapbuf);
735
736         return 0;
737 }
738
739
740 /* Try to find a filename in the same dir as "fname" with a similar name. */
741 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
742 {
743         int fname_len, fname_suf_len;
744         const char *fname_suf, *fname = file->basename;
745         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
746         int i, j;
747         struct file_struct *lowest_fp = NULL;
748
749         fname_len = strlen(fname);
750         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
751
752         /* Try to find an exact size+mtime match first. */
753         for (i = 0; i < fuzzy_basis; i++) {
754                 struct file_list *dirlist = dirlist_array[i];
755
756                 if (!dirlist)
757                         continue;
758
759                 for (j = 0; j < dirlist->used; j++) {
760                         struct file_struct *fp = dirlist->files[j];
761
762                         if (!F_IS_ACTIVE(fp))
763                                 continue;
764
765                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
766                                 continue;
767
768                         if (F_LENGTH(fp) == F_LENGTH(file) && cmp_time(fp->modtime, file->modtime) == 0) {
769                                 if (DEBUG_GTE(FUZZY, 2))
770                                         rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
771                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
772                                 return fp;
773                         }
774
775                 }
776         }
777
778         for (i = 0; i < fuzzy_basis; i++) {
779                 struct file_list *dirlist = dirlist_array[i];
780
781                 if (!dirlist)
782                         continue;
783
784                 for (j = 0; j < dirlist->used; j++) {
785                         struct file_struct *fp = dirlist->files[j];
786                         const char *suf, *name;
787                         int len, suf_len;
788                         uint32 dist;
789
790                         if (!F_IS_ACTIVE(fp))
791                                 continue;
792
793                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
794                                 continue;
795
796                         name = fp->basename;
797                         len = strlen(name);
798                         suf = find_filename_suffix(name, len, &suf_len);
799
800                         dist = fuzzy_distance(name, len, fname, fname_len);
801                         /* Add some extra weight to how well the suffixes match. */
802                         dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
803                         if (DEBUG_GTE(FUZZY, 2)) {
804                                 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
805                                         f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
806                         }
807                         if (dist <= lowest_dist) {
808                                 lowest_dist = dist;
809                                 lowest_fp = fp;
810                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
811                         }
812                 }
813         }
814
815         return lowest_fp;
816 }
817
818 /* Copy a file found in our --copy-dest handling. */
819 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
820 {
821         char buf[MAXPATHLEN];
822         const char *copy_to, *partialptr;
823         int save_preserve_xattrs = preserve_xattrs;
824         int ok, fd_w;
825
826         if (inplace) {
827                 /* Let copy_file open the destination in place. */
828                 fd_w = -1;
829                 copy_to = dest;
830         } else {
831                 fd_w = open_tmpfile(buf, dest, file);
832                 if (fd_w < 0)
833                         return -1;
834                 copy_to = buf;
835         }
836         cleanup_set(copy_to, NULL, NULL, -1, -1);
837         if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
838                 if (INFO_GTE(COPY, 1)) {
839                         rsyserr(FINFO, errno, "copy_file %s => %s",
840                                 full_fname(src), copy_to);
841                 }
842                 /* Try to clean up. */
843                 unlink(copy_to);
844                 cleanup_disable();
845                 return -1;
846         }
847         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
848         preserve_xattrs = 0; /* xattrs were copied with file */
849         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
850         preserve_xattrs = save_preserve_xattrs;
851         cleanup_disable();
852         return ok ? 0 : -1;
853 }
854
855 /* This is only called for regular files.  We return -2 if we've finished
856  * handling the file, -1 if no dest-linking occurred, or a non-negative
857  * value if we found an alternate basis file.  If we're called with the
858  * find_exact_for_existing flag, the destination file already exists, so
859  * we only try to find an exact alt-dest match.  In this case, the returns
860  * are only -2 & -1 (both as above). */
861 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
862                          char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
863                          int itemizing, enum logcode code)
864 {
865         STRUCT_STAT real_st = sxp->st;
866         int best_match = -1;
867         int match_level = 0;
868         int j = 0;
869
870         do {
871                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
872                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
873                         continue;
874                 switch (match_level) {
875                 case 0:
876                         best_match = j;
877                         match_level = 1;
878                         /* FALL THROUGH */
879                 case 1:
880                         if (!unchanged_file(cmpbuf, file, &sxp->st))
881                                 continue;
882                         best_match = j;
883                         match_level = 2;
884                         /* FALL THROUGH */
885                 case 2:
886                         if (!unchanged_attrs(cmpbuf, file, sxp)) {
887                                 free_stat_x(sxp);
888                                 continue;
889                         }
890                         best_match = j;
891                         match_level = 3;
892                         break;
893                 }
894                 break;
895         } while (basis_dir[++j] != NULL);
896
897         if (!match_level)
898                 return -1;
899
900         if (j != best_match) {
901                 j = best_match;
902                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
903                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
904                         return -1;
905         }
906
907         if (match_level == 3 && !copy_dest) {
908                 if (find_exact_for_existing) {
909                         if (link_dest && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
910                                 return -1;
911                         if (do_unlink(fname) < 0 && errno != ENOENT) {
912                                 sxp->st = real_st;
913                                 return -1;
914                         }
915                 }
916 #ifdef SUPPORT_HARD_LINKS
917                 if (link_dest) {
918                         if (!hard_link_one(file, fname, cmpbuf, 1))
919                                 goto try_a_copy;
920                         if (preserve_hard_links && F_IS_HLINKED(file))
921                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
922                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
923                                 itemize(cmpbuf, file, ndx, 1, sxp,
924                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
925                                         0, "");
926                         }
927                 } else
928 #endif
929                 {
930                         if (itemizing)
931                                 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
932                 }
933                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
934                         rprintf(FCLIENT, "%s is uptodate\n", fname);
935                 return -2;
936         }
937
938         if (find_exact_for_existing) {
939                 sxp->st = real_st;
940                 return -1;
941         }
942
943         if (match_level >= 2) {
944 #ifdef SUPPORT_HARD_LINKS
945           try_a_copy: /* Copy the file locally. */
946 #endif
947                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
948                         if (find_exact_for_existing) /* Can get here via hard-link failure */
949                                 sxp->st = real_st;
950                         return -1;
951                 }
952                 if (itemizing)
953                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
954                 if (maybe_ATTRS_REPORT
955                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
956                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
957                         code = match_level == 3 ? FCLIENT : FINFO;
958                         rprintf(code, "%s%s\n", fname,
959                                 match_level == 3 ? " is uptodate" : "");
960                 }
961 #ifdef SUPPORT_HARD_LINKS
962                 if (preserve_hard_links && F_IS_HLINKED(file))
963                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
964 #endif
965                 return -2;
966         }
967
968         return FNAMECMP_BASIS_DIR_LOW + j;
969 }
970
971 /* This is only called for non-regular files.  We return -2 if we've finished
972  * handling the file, or -1 if no dest-linking occurred, or a non-negative
973  * value if we found an alternate basis file. */
974 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
975                          char *cmpbuf, stat_x *sxp, int itemizing,
976                          enum logcode code)
977 {
978         int best_match = -1;
979         int match_level = 0;
980         enum nonregtype type;
981         uint32 *devp;
982 #ifdef SUPPORT_LINKS
983         char lnk[MAXPATHLEN];
984         int len;
985 #endif
986         int j = 0;
987
988 #ifndef SUPPORT_LINKS
989         if (S_ISLNK(file->mode))
990                 return -1;
991 #endif
992         if (S_ISDIR(file->mode)) {
993                 type = TYPE_DIR;
994         } else if (IS_SPECIAL(file->mode))
995                 type = TYPE_SPECIAL;
996         else if (IS_DEVICE(file->mode))
997                 type = TYPE_DEVICE;
998 #ifdef SUPPORT_LINKS
999         else if (S_ISLNK(file->mode))
1000                 type = TYPE_SYMLINK;
1001 #endif
1002         else {
1003                 rprintf(FERROR,
1004                         "internal: try_dests_non() called with invalid mode (%o)\n",
1005                         (int)file->mode);
1006                 exit_cleanup(RERR_UNSUPPORTED);
1007         }
1008
1009         do {
1010                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1011                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1012                         continue;
1013                 switch (type) {
1014                 case TYPE_DIR:
1015                         if (!S_ISDIR(sxp->st.st_mode))
1016                                 continue;
1017                         break;
1018                 case TYPE_SPECIAL:
1019                         if (!IS_SPECIAL(sxp->st.st_mode))
1020                                 continue;
1021                         break;
1022                 case TYPE_DEVICE:
1023                         if (!IS_DEVICE(sxp->st.st_mode))
1024                                 continue;
1025                         break;
1026                 case TYPE_SYMLINK:
1027 #ifdef SUPPORT_LINKS
1028                         if (!S_ISLNK(sxp->st.st_mode))
1029                                 continue;
1030                         break;
1031 #else
1032                         return -1;
1033 #endif
1034                 }
1035                 if (match_level < 1) {
1036                         match_level = 1;
1037                         best_match = j;
1038                 }
1039                 switch (type) {
1040                 case TYPE_DIR:
1041                 case TYPE_SPECIAL:
1042                         break;
1043                 case TYPE_DEVICE:
1044                         devp = F_RDEV_P(file);
1045                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1046                                 continue;
1047                         break;
1048                 case TYPE_SYMLINK:
1049 #ifdef SUPPORT_LINKS
1050                         if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1051                                 continue;
1052                         lnk[len] = '\0';
1053                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1054                                 continue;
1055                         break;
1056 #else
1057                         return -1;
1058 #endif
1059                 }
1060                 if (match_level < 2) {
1061                         match_level = 2;
1062                         best_match = j;
1063                 }
1064                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1065                         match_level = 3;
1066                         best_match = j;
1067                         break;
1068                 }
1069         } while (basis_dir[++j] != NULL);
1070
1071         if (!match_level)
1072                 return -1;
1073
1074         if (j != best_match) {
1075                 j = best_match;
1076                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1077                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1078                         return -1;
1079         }
1080
1081         if (match_level == 3) {
1082 #ifdef SUPPORT_HARD_LINKS
1083                 if (link_dest
1084 #ifndef CAN_HARDLINK_SYMLINK
1085                  && !S_ISLNK(file->mode)
1086 #endif
1087 #ifndef CAN_HARDLINK_SPECIAL
1088                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1089 #endif
1090                  && !S_ISDIR(file->mode)) {
1091                         if (do_link(cmpbuf, fname) < 0) {
1092                                 rsyserr(FERROR_XFER, errno,
1093                                         "failed to hard-link %s with %s",
1094                                         cmpbuf, fname);
1095                                 return j;
1096                         }
1097                         if (preserve_hard_links && F_IS_HLINKED(file))
1098                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1099                 } else
1100 #endif
1101                         match_level = 2;
1102                 if (itemizing && stdout_format_has_i
1103                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1104                         int chg = compare_dest && type != TYPE_DIR ? 0
1105                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1106                         char *lp = match_level == 3 ? "" : NULL;
1107                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1108                 }
1109                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1110                         rprintf(FCLIENT, "%s%s is uptodate\n",
1111                                 fname, type == TYPE_DIR ? "/" : "");
1112                 }
1113                 return -2;
1114         }
1115
1116         return j;
1117 }
1118
1119 static void list_file_entry(struct file_struct *f)
1120 {
1121         char permbuf[PERMSTRING_SIZE];
1122         int64 len;
1123         int colwidth = human_readable ? 14 : 11;
1124
1125         if (!F_IS_ACTIVE(f)) {
1126                 /* this can happen if duplicate names were removed */
1127                 return;
1128         }
1129
1130         permstring(permbuf, f->mode);
1131         len = F_LENGTH(f);
1132
1133         /* TODO: indicate '+' if the entry has an ACL. */
1134
1135 #ifdef SUPPORT_LINKS
1136         if (preserve_links && S_ISLNK(f->mode)) {
1137                 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1138                         permbuf, colwidth, human_num(len),
1139                         timestring(f->modtime), f_name(f, NULL),
1140                         F_SYMLINK(f));
1141         } else
1142 #endif
1143         if (missing_args == 2 && f->mode == 0) {
1144                 rprintf(FINFO, "%-*s %s\n",
1145                         colwidth + 31, "*missing",
1146                         f_name(f, NULL));
1147         } else {
1148                 rprintf(FINFO, "%s %*s %s %s\n",
1149                         permbuf, colwidth, human_num(len),
1150                         timestring(f->modtime), f_name(f, NULL));
1151         }
1152 }
1153
1154 static int phase = 0;
1155 static int dflt_perms;
1156
1157 static int implied_dirs_are_missing;
1158 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1159 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1160 {
1161         return F_DEPTH(file) > F_DEPTH(subtree)
1162                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1163 }
1164
1165 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1166  * make sure it exists, and has the right permissions/timestamp info.  For
1167  * all other non-regular files (symlinks, etc.) we create them here.  For
1168  * regular files that have changed, we try to find a basis file and then
1169  * start sending checksums.  The ndx is the file's unique index value.
1170  *
1171  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1172  * passed to delete_item(), which can use it during a recursive delete.)
1173  *
1174  * Note that f_out is set to -1 when doing final directory-permission and
1175  * modification-time repair. */
1176 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1177                            int itemizing, enum logcode code, int f_out)
1178 {
1179         static const char *parent_dirname = "";
1180         static struct file_struct *prior_dir_file = NULL;
1181         /* Missing dir not created due to --dry-run; will still be scanned. */
1182         static struct file_struct *dry_missing_dir = NULL;
1183         /* Missing dir whose contents are skipped altogether due to
1184          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1185         static struct file_struct *skip_dir = NULL;
1186         static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1187         static int need_fuzzy_dirlist = 0;
1188         struct file_struct *fuzzy_file = NULL;
1189         int fd = -1, f_copy = -1;
1190         stat_x sx, real_sx;
1191         STRUCT_STAT partial_st;
1192         struct file_struct *back_file = NULL;
1193         int statret, real_ret, stat_errno;
1194         char *fnamecmp, *partialptr, *backupptr = NULL;
1195         char fnamecmpbuf[MAXPATHLEN];
1196         uchar fnamecmp_type;
1197         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1198         int is_dir = !S_ISDIR(file->mode) ? 0
1199                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1200                    : 1;
1201
1202         if (DEBUG_GTE(GENR, 1))
1203                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1204
1205         if (list_only) {
1206                 if (is_dir < 0
1207                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1208                         return;
1209                 list_file_entry(file);
1210                 return;
1211         }
1212
1213         if (skip_dir) {
1214                 if (is_below(file, skip_dir)) {
1215                         if (is_dir)
1216                                 file->flags |= FLAG_MISSING_DIR;
1217 #ifdef SUPPORT_HARD_LINKS
1218                         else if (F_IS_HLINKED(file))
1219                                 handle_skipped_hlink(file, itemizing, code, f_out);
1220 #endif
1221                         return;
1222                 }
1223                 skip_dir = NULL;
1224         }
1225
1226         init_stat_x(&sx);
1227         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1228                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1229                         if (is_dir < 0)
1230                                 return;
1231 #ifdef SUPPORT_HARD_LINKS
1232                         if (F_IS_HLINKED(file))
1233                                 handle_skipped_hlink(file, itemizing, code, f_out);
1234 #endif
1235                         rprintf(FERROR_XFER,
1236                                 "ERROR: daemon refused to receive %s \"%s\"\n",
1237                                 is_dir ? "directory" : "file", fname);
1238                         if (is_dir)
1239                                 goto skipping_dir_contents;
1240                         return;
1241                 }
1242         }
1243
1244         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1245                 int i;
1246           parent_is_dry_missing:
1247                 for (i = 0; i < fuzzy_basis; i++) {
1248                         if (fuzzy_dirlist[i]) {
1249                                 flist_free(fuzzy_dirlist[i]);
1250                                 fuzzy_dirlist[i] = NULL;
1251                         }
1252                 }
1253                 parent_dirname = "";
1254                 statret = -1;
1255                 stat_errno = ENOENT;
1256         } else {
1257                 const char *dn = file->dirname ? file->dirname : ".";
1258                 dry_missing_dir = NULL;
1259                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1260                         /* Each parent dir must be in the file list or the flist data is bad.
1261                          * Optimization: most of the time the parent dir will be the last dir
1262                          * this function was asked to process in the file list. */
1263                         if (!inc_recurse
1264                          && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
1265                          && (prior_dir_file && strcmp(dn, f_name(prior_dir_file, NULL)) != 0)
1266                          && flist_find_name(cur_flist, dn, 1) < 0) {
1267                                 rprintf(FERROR,
1268                                         "ABORTING due to invalid path from sender: %s/%s\n",
1269                                         dn, file->basename);
1270                                 exit_cleanup(RERR_PROTOCOL);
1271                         }
1272                         if (relative_paths && !implied_dirs
1273                          && do_stat(dn, &sx.st) < 0) {
1274                                 if (dry_run)
1275                                         goto parent_is_dry_missing;
1276                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1277                                         rsyserr(FERROR_XFER, errno,
1278                                                 "recv_generator: mkdir %s failed",
1279                                                 full_fname(dn));
1280                                 }
1281                         }
1282                         if (fuzzy_basis) {
1283                                 int i;
1284                                 for (i = 0; i < fuzzy_basis; i++) {
1285                                         if (fuzzy_dirlist[i]) {
1286                                                 flist_free(fuzzy_dirlist[i]);
1287                                                 fuzzy_dirlist[i] = NULL;
1288                                         }
1289                                 }
1290                                 need_fuzzy_dirlist = 1;
1291                         }
1292 #ifdef SUPPORT_ACLS
1293                         if (!preserve_perms)
1294                                 dflt_perms = default_perms_for_dir(dn);
1295 #endif
1296                 }
1297                 parent_dirname = dn;
1298
1299                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1300                         int i;
1301                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1302                         for (i = 0; i < fuzzy_basis; i++) {
1303                                 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1304                                         continue;
1305                                 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1306                                 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1307                                         flist_free(fuzzy_dirlist[i]);
1308                                         fuzzy_dirlist[i] = NULL;
1309                                 }
1310                         }
1311                         need_fuzzy_dirlist = 0;
1312                 }
1313
1314                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1315                 stat_errno = errno;
1316         }
1317
1318         if (missing_args == 2 && file->mode == 0) {
1319                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1320                         return;
1321                 if (statret == 0)
1322                         delete_item(fname, sx.st.st_mode, del_opts);
1323                 return;
1324         }
1325
1326         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1327                 if (is_dir) {
1328                         if (is_dir < 0)
1329                                 return;
1330                         skip_dir = file;
1331                         file->flags |= FLAG_MISSING_DIR;
1332                 }
1333 #ifdef SUPPORT_HARD_LINKS
1334                 else if (F_IS_HLINKED(file))
1335                         handle_skipped_hlink(file, itemizing, code, f_out);
1336 #endif
1337                 if (INFO_GTE(SKIP, 1)) {
1338                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1339                                 is_dir ? "directory" : "file", fname);
1340                 }
1341                 return;
1342         }
1343
1344         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1345          && !am_root && sx.st.st_uid == our_uid)
1346                 del_opts |= DEL_NO_UID_WRITE;
1347
1348         if (ignore_existing > 0 && statret == 0
1349          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1350                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1351                         rprintf(FINFO, "%s exists\n", fname);
1352 #ifdef SUPPORT_HARD_LINKS
1353                 if (F_IS_HLINKED(file))
1354                         handle_skipped_hlink(file, itemizing, code, f_out);
1355 #endif
1356                 goto cleanup;
1357         }
1358
1359         fnamecmp = fname;
1360
1361         if (is_dir) {
1362                 mode_t added_perms;
1363                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1364                         goto cleanup;
1365                 if (am_root < 0) {
1366                         /* For --fake-super, the dir must be useable by the copying
1367                          * user, just like it would be for root. */
1368                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1369                 } else
1370                         added_perms = 0;
1371                 if (is_dir < 0) {
1372                         if (!(preserve_times & PRESERVE_DIR_TIMES))
1373                                 return;
1374                         /* In inc_recurse mode we want to make sure any missing
1375                          * directories get created while we're still processing
1376                          * the parent dir (which allows us to touch the parent
1377                          * dir's mtime right away).  We will handle the dir in
1378                          * full later (right before we handle its contents). */
1379                         if (statret == 0
1380                          && (S_ISDIR(sx.st.st_mode)
1381                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1382                                 goto cleanup; /* Any errors get reported later. */
1383                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1384                                 file->flags |= FLAG_DIR_CREATED;
1385                         goto cleanup;
1386                 }
1387                 /* The file to be received is a directory, so we need
1388                  * to prepare appropriately.  If there is already a
1389                  * file of that name and it is *not* a directory, then
1390                  * we need to delete it.  If it doesn't exist, then
1391                  * (perhaps recursively) create it. */
1392                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1393                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1394                                 goto skipping_dir_contents;
1395                         statret = -1;
1396                 }
1397                 if (dry_run && statret != 0) {
1398                         if (!dry_missing_dir)
1399                                 dry_missing_dir = file;
1400                         file->flags |= FLAG_MISSING_DIR;
1401                 }
1402                 init_stat_x(&real_sx);
1403                 real_sx.st = sx.st;
1404                 real_ret = statret;
1405                 if (file->flags & FLAG_DIR_CREATED)
1406                         statret = -1;
1407                 if (!preserve_perms) { /* See comment in non-dir code below. */
1408                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1409                                                dflt_perms, statret == 0);
1410                 }
1411                 if (statret != 0 && basis_dir[0] != NULL) {
1412                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1413                                               itemizing, code);
1414                         if (j == -2) {
1415                                 itemizing = 0;
1416                                 code = FNONE;
1417                                 statret = 1;
1418                         } else if (j >= 0) {
1419                                 statret = 1;
1420                                 fnamecmp = fnamecmpbuf;
1421                         }
1422                 }
1423                 if (itemizing && f_out != -1) {
1424                         itemize(fnamecmp, file, ndx, statret, &sx,
1425                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1426                 }
1427                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1428                         if (!relative_paths || errno != ENOENT
1429                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1430                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1431                                 rsyserr(FERROR_XFER, errno,
1432                                         "recv_generator: mkdir %s failed",
1433                                         full_fname(fname));
1434                           skipping_dir_contents:
1435                                 rprintf(FERROR,
1436                                     "*** Skipping any contents from this failed directory ***\n");
1437                                 skip_dir = file;
1438                                 file->flags |= FLAG_MISSING_DIR;
1439                                 goto cleanup;
1440                         }
1441                 }
1442
1443 #ifdef SUPPORT_XATTRS
1444                 if (preserve_xattrs && statret == 1)
1445                         copy_xattrs(fnamecmpbuf, fname);
1446 #endif
1447                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1448                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1449                         rprintf(code, "%s/\n", fname);
1450
1451                 /* We need to ensure that the dirs in the transfer have both
1452                  * readable and writable permissions during the time we are
1453                  * putting files within them.  This is then restored to the
1454                  * former permissions after the transfer is done. */
1455 #ifdef HAVE_CHMOD
1456                 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1457                         mode_t mode = file->mode | S_IRWXU;
1458                         if (do_chmod(fname, mode) < 0) {
1459                                 rsyserr(FERROR_XFER, errno,
1460                                         "failed to modify permissions on %s",
1461                                         full_fname(fname));
1462                         }
1463                         need_retouch_dir_perms = 1;
1464                 }
1465 #endif
1466
1467                 if (real_ret != 0 && one_file_system)
1468                         real_sx.st.st_dev = filesystem_dev;
1469                 if (inc_recurse) {
1470                         if (one_file_system) {
1471                                 uint32 *devp = F_DIR_DEV_P(file);
1472                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1473                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1474                         }
1475                 }
1476                 else if (delete_during && f_out != -1 && !phase
1477                     && !(file->flags & FLAG_MISSING_DIR)) {
1478                         if (file->flags & FLAG_CONTENT_DIR)
1479                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1480                         else
1481                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1482                 }
1483                 prior_dir_file = file;
1484                 goto cleanup;
1485         }
1486
1487         /* If we're not preserving permissions, change the file-list's
1488          * mode based on the local permissions and some heuristics. */
1489         if (!preserve_perms) {
1490                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1491                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1492                                        exists);
1493         }
1494
1495 #ifdef SUPPORT_HARD_LINKS
1496         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1497          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1498                 goto cleanup;
1499 #endif
1500
1501         if (preserve_links && S_ISLNK(file->mode)) {
1502 #ifdef SUPPORT_LINKS
1503                 const char *sl = F_SYMLINK(file);
1504                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1505                         if (INFO_GTE(NAME, 1)) {
1506                                 if (solo_file) {
1507                                         /* fname contains the destination path, but we
1508                                          * want to report the source path. */
1509                                         fname = f_name(file, NULL);
1510                                 }
1511                                 rprintf(FINFO,
1512                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1513                                         fname, sl);
1514                         }
1515                         return;
1516                 }
1517                 if (statret == 0) {
1518                         char lnk[MAXPATHLEN];
1519                         int len;
1520
1521                         if (S_ISLNK(sx.st.st_mode)
1522                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1523                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1524                                 /* The link is pointing to the right place. */
1525                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1526                                 if (itemizing)
1527                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1528 #ifdef SUPPORT_HARD_LINKS
1529                                 if (preserve_hard_links && F_IS_HLINKED(file))
1530                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1531 #endif
1532                                 if (remove_source_files == 1)
1533                                         goto return_with_success;
1534                                 goto cleanup;
1535                         }
1536                 } else if (basis_dir[0] != NULL) {
1537                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1538                                               itemizing, code);
1539                         if (j == -2) {
1540 #ifndef CAN_HARDLINK_SYMLINK
1541                                 if (link_dest) {
1542                                         /* Resort to --copy-dest behavior. */
1543                                 } else
1544 #endif
1545                                 if (!copy_dest)
1546                                         goto cleanup;
1547                                 itemizing = 0;
1548                                 code = FNONE;
1549                         } else if (j >= 0) {
1550                                 statret = 1;
1551                                 fnamecmp = fnamecmpbuf;
1552                         }
1553                 }
1554                 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1555                         set_file_attrs(fname, file, NULL, NULL, 0);
1556                         if (itemizing) {
1557                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1558                                         statret = -1;
1559                                 itemize(fnamecmp, file, ndx, statret, &sx,
1560                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1561                         }
1562                         if (code != FNONE && INFO_GTE(NAME, 1))
1563                                 rprintf(code, "%s -> %s\n", fname, sl);
1564 #ifdef SUPPORT_HARD_LINKS
1565                         if (preserve_hard_links && F_IS_HLINKED(file))
1566                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1567 #endif
1568                         /* This does not check remove_source_files == 1
1569                          * because this is one of the items that the old
1570                          * --remove-sent-files option would remove. */
1571                         if (remove_source_files)
1572                                 goto return_with_success;
1573                 }
1574 #endif
1575                 goto cleanup;
1576         }
1577
1578         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1579          || (preserve_specials && IS_SPECIAL(file->mode))) {
1580                 dev_t rdev;
1581                 int del_for_flag = 0;
1582                 if (IS_DEVICE(file->mode)) {
1583                         uint32 *devp = F_RDEV_P(file);
1584                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1585                 } else
1586                         rdev = 0;
1587                 if (statret == 0) {
1588                         if (IS_DEVICE(file->mode)) {
1589                                 if (!IS_DEVICE(sx.st.st_mode))
1590                                         statret = -1;
1591                                 del_for_flag = DEL_FOR_DEVICE;
1592                         } else {
1593                                 if (!IS_SPECIAL(sx.st.st_mode))
1594                                         statret = -1;
1595                                 del_for_flag = DEL_FOR_SPECIAL;
1596                         }
1597                         if (statret == 0
1598                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1599                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1600                                 /* The device or special file is identical. */
1601                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1602                                 if (itemizing)
1603                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1604 #ifdef SUPPORT_HARD_LINKS
1605                                 if (preserve_hard_links && F_IS_HLINKED(file))
1606                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1607 #endif
1608                                 if (remove_source_files == 1)
1609                                         goto return_with_success;
1610                                 goto cleanup;
1611                         }
1612                 } else if (basis_dir[0] != NULL) {
1613                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1614                                               itemizing, code);
1615                         if (j == -2) {
1616 #ifndef CAN_HARDLINK_SPECIAL
1617                                 if (link_dest) {
1618                                         /* Resort to --copy-dest behavior. */
1619                                 } else
1620 #endif
1621                                 if (!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
1678             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1679                 if (INFO_GTE(SKIP, 1))
1680                         rprintf(FINFO, "%s is newer\n", fname);
1681 #ifdef SUPPORT_HARD_LINKS
1682                 if (F_IS_HLINKED(file))
1683                         handle_skipped_hlink(file, itemizing, code, f_out);
1684 #endif
1685                 goto cleanup;
1686         }
1687
1688         fnamecmp_type = FNAMECMP_FNAME;
1689
1690         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1691                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1692                         goto cleanup;
1693                 statret = -1;
1694                 stat_errno = ENOENT;
1695         }
1696
1697         if (basis_dir[0] != NULL && (statret != 0 || !copy_dest)) {
1698                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1699                                       statret == 0, itemizing, code);
1700                 if (j == -2) {
1701                         if (remove_source_files == 1)
1702                                 goto return_with_success;
1703                         goto cleanup;
1704                 }
1705                 if (j >= 0) {
1706                         fnamecmp = fnamecmpbuf;
1707                         fnamecmp_type = j;
1708                         statret = 0;
1709                 }
1710         }
1711
1712         init_stat_x(&real_sx);
1713         real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1714         real_ret = statret;
1715
1716         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1717             && link_stat(partialptr, &partial_st, 0) == 0
1718             && S_ISREG(partial_st.st_mode)) {
1719                 if (statret != 0)
1720                         goto prepare_to_open;
1721         } else
1722                 partialptr = NULL;
1723
1724         if (statret != 0 && fuzzy_basis) {
1725                 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1726                 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1727                 if (fuzzy_file) {
1728                         f_name(fuzzy_file, fnamecmpbuf);
1729                         if (DEBUG_GTE(FUZZY, 1)) {
1730                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1731                                         fname, fnamecmpbuf);
1732                         }
1733                         sx.st.st_size = F_LENGTH(fuzzy_file);
1734                         statret = 0;
1735                         fnamecmp = fnamecmpbuf;
1736                 }
1737         }
1738
1739         if (statret != 0) {
1740 #ifdef SUPPORT_HARD_LINKS
1741                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1742                         cur_flist->in_progress++;
1743                         goto cleanup;
1744                 }
1745 #endif
1746                 if (stat_errno == ENOENT)
1747                         goto notify_others;
1748                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1749                         full_fname(fname));
1750                 goto cleanup;
1751         }
1752
1753         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1754                 ;
1755         else if (fnamecmp_type == FNAMECMP_FUZZY)
1756                 ;
1757         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1758                 if (partialptr) {
1759                         do_unlink(partialptr);
1760                         handle_partial_dir(partialptr, PDIR_DELETE);
1761                 }
1762                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1763                 if (itemizing)
1764                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1765 #ifdef SUPPORT_HARD_LINKS
1766                 if (preserve_hard_links && F_IS_HLINKED(file))
1767                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1768 #endif
1769                 if (remove_source_files != 1)
1770                         goto cleanup;
1771           return_with_success:
1772                 if (!dry_run)
1773                         send_msg_int(MSG_SUCCESS, ndx);
1774                 goto cleanup;
1775         }
1776
1777         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1778 #ifdef SUPPORT_HARD_LINKS
1779                 if (F_IS_HLINKED(file))
1780                         handle_skipped_hlink(file, itemizing, code, f_out);
1781 #endif
1782                 goto cleanup;
1783         }
1784
1785   prepare_to_open:
1786         if (partialptr) {
1787                 sx.st = partial_st;
1788                 fnamecmp = partialptr;
1789                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1790                 statret = 0;
1791         }
1792
1793         if (!do_xfers)
1794                 goto notify_others;
1795
1796         if (read_batch || whole_file) {
1797                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1798                         if (!(backupptr = get_backup_name(fname)))
1799                                 goto cleanup;
1800                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1801                                 goto pretend_missing;
1802                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1803                                 unmake_file(back_file);
1804                                 back_file = NULL;
1805                                 goto cleanup;
1806                         }
1807                 }
1808                 goto notify_others;
1809         }
1810
1811         if (fuzzy_dirlist[0]) {
1812                 int j = flist_find(fuzzy_dirlist[0], file);
1813                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1814                         fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1815         }
1816
1817         /* open the file */
1818         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1819                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1820                         full_fname(fnamecmp));
1821           pretend_missing:
1822                 /* pretend the file didn't exist */
1823 #ifdef SUPPORT_HARD_LINKS
1824                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1825                         cur_flist->in_progress++;
1826                         goto cleanup;
1827                 }
1828 #endif
1829                 statret = real_ret = -1;
1830                 goto notify_others;
1831         }
1832
1833         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1834                 if (!(backupptr = get_backup_name(fname))) {
1835                         close(fd);
1836                         goto cleanup;
1837                 }
1838                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1839                         close(fd);
1840                         goto pretend_missing;
1841                 }
1842                 if (robust_unlink(backupptr) && errno != ENOENT) {
1843                         rsyserr(FERROR_XFER, errno, "unlink %s",
1844                                 full_fname(backupptr));
1845                         unmake_file(back_file);
1846                         back_file = NULL;
1847                         close(fd);
1848                         goto cleanup;
1849                 }
1850                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1851                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1852                         unmake_file(back_file);
1853                         back_file = NULL;
1854                         close(fd);
1855                         goto cleanup;
1856                 }
1857                 fnamecmp_type = FNAMECMP_BACKUP;
1858         }
1859
1860         if (DEBUG_GTE(DELTASUM, 3)) {
1861                 rprintf(FINFO, "gen mapped %s of size %s\n",
1862                         fnamecmp, big_num(sx.st.st_size));
1863         }
1864
1865         if (DEBUG_GTE(DELTASUM, 2))
1866                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1867
1868   notify_others:
1869         if (remove_source_files && !delay_updates && !phase && !dry_run)
1870                 increment_active_files(ndx, itemizing, code);
1871         if (inc_recurse && (!dry_run || write_batch < 0))
1872                 cur_flist->in_progress++;
1873 #ifdef SUPPORT_HARD_LINKS
1874         if (preserve_hard_links && F_IS_HLINKED(file))
1875                 file->flags |= FLAG_FILE_SENT;
1876 #endif
1877         write_ndx(f_out, ndx);
1878         if (itemizing) {
1879                 int iflags = ITEM_TRANSFER;
1880                 if (always_checksum > 0)
1881                         iflags |= ITEM_REPORT_CHANGE;
1882                 if (fnamecmp_type != FNAMECMP_FNAME)
1883                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1884                 if (fnamecmp_type >= FNAMECMP_FUZZY)
1885                         iflags |= ITEM_XNAME_FOLLOWS;
1886                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1887                         fuzzy_file ? fuzzy_file->basename : NULL);
1888                 free_stat_x(&real_sx);
1889         }
1890
1891         if (!do_xfers) {
1892 #ifdef SUPPORT_HARD_LINKS
1893                 if (preserve_hard_links && F_IS_HLINKED(file))
1894                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1895 #endif
1896                 goto cleanup;
1897         }
1898         if (read_batch)
1899                 goto cleanup;
1900
1901         if (statret != 0 || whole_file)
1902                 write_sum_head(f_out, NULL);
1903         else if (sx.st.st_size <= 0) {
1904                 write_sum_head(f_out, NULL);
1905                 close(fd);
1906         } else {
1907                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1908                         rprintf(FWARNING,
1909                             "WARNING: file is too large for checksum sending: %s\n",
1910                             fnamecmp);
1911                         write_sum_head(f_out, NULL);
1912                 }
1913                 close(fd);
1914         }
1915
1916   cleanup:
1917         if (back_file) {
1918                 int save_preserve_xattrs = preserve_xattrs;
1919                 if (f_copy >= 0)
1920                         close(f_copy);
1921 #ifdef SUPPORT_XATTRS
1922                 if (preserve_xattrs) {
1923                         copy_xattrs(fname, backupptr);
1924                         preserve_xattrs = 0;
1925                 }
1926 #endif
1927                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1928                 preserve_xattrs = save_preserve_xattrs;
1929                 if (INFO_GTE(BACKUP, 1)) {
1930                         rprintf(FINFO, "backed up %s to %s\n",
1931                                 fname, backupptr);
1932                 }
1933                 unmake_file(back_file);
1934         }
1935
1936         free_stat_x(&sx);
1937 }
1938
1939 /* If we are replacing an existing hard link, symlink, device, or special file,
1940  * create a temp-name item and rename it into place.  A symlimk specifies slnk,
1941  * a hard link specifies hlnk, otherwise we create a device based on rdev.
1942  * Specify 0 for the del_for_flag if there is not a file to replace.  This
1943  * returns 1 on success and 0 on failure. */
1944 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1945                   dev_t rdev, stat_x *sxp, int del_for_flag)
1946 {
1947         char tmpname[MAXPATHLEN];
1948         const char *create_name;
1949         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1950
1951         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1952                 skip_atomic = 1;
1953         else
1954                 skip_atomic = 0;
1955
1956         if (del_for_flag) {
1957                 if (make_backups > 0 && !dir_in_the_way) {
1958                         if (!make_backup(fname, skip_atomic))
1959                                 return 0;
1960                 } else if (skip_atomic) {
1961                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1962                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1963                                 return 0;
1964                 }
1965         }
1966
1967         create_name = skip_atomic ? fname : tmpname;
1968
1969         if (slnk) {
1970 #ifdef SUPPORT_LINKS
1971                 if (do_symlink(slnk, create_name) < 0) {
1972                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1973                                 full_fname(create_name), slnk);
1974                         return 0;
1975                 }
1976 #else
1977                 return 0;
1978 #endif
1979         } else if (hlnk) {
1980 #ifdef SUPPORT_HARD_LINKS
1981                 if (!hard_link_one(file, create_name, hlnk, 0))
1982                         return 0;
1983 #else
1984                 return 0;
1985 #endif
1986         } else {
1987                 if (do_mknod(create_name, file->mode, rdev) < 0) {
1988                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1989                                 full_fname(create_name));
1990                         return 0;
1991                 }
1992         }
1993
1994         if (!skip_atomic) {
1995                 if (do_rename(tmpname, fname) < 0) {
1996                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
1997                                 full_fname(tmpname), full_fname(fname));
1998                         do_unlink(tmpname);
1999                         return 0;
2000                 }
2001         }
2002
2003         return 1;
2004 }
2005
2006 #ifdef SUPPORT_HARD_LINKS
2007 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2008                                  enum logcode code, int f_out)
2009 {
2010         char fbuf[MAXPATHLEN];
2011         int new_last_ndx;
2012         struct file_list *save_flist = cur_flist;
2013
2014         /* If we skip the last item in a chain of links and there was a
2015          * prior non-skipped hard-link waiting to finish, finish it now. */
2016         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2017                 return;
2018
2019         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2020         cur_flist->in_progress--; /* undo prior increment */
2021         f_name(file, fbuf);
2022         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2023
2024         cur_flist = save_flist;
2025 }
2026 #endif
2027
2028 static void touch_up_dirs(struct file_list *flist, int ndx)
2029 {
2030         static int counter = 0;
2031         struct file_struct *file;
2032         char *fname;
2033         BOOL fix_dir_perms;
2034         int i, start, end;
2035
2036         if (ndx < 0) {
2037                 start = 0;
2038                 end = flist->used - 1;
2039         } else
2040                 start = end = ndx;
2041
2042         /* Fix any directory permissions that were modified during the
2043          * transfer and/or re-set any tweaked modified-time values. */
2044         for (i = start; i <= end; i++, counter++) {
2045                 file = flist->files[i];
2046                 if (!F_IS_ACTIVE(file))
2047                         continue;
2048                 if (!S_ISDIR(file->mode)
2049                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2050                         continue;
2051                 if (DEBUG_GTE(TIME, 2)) {
2052                         fname = f_name(file, NULL);
2053                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2054                                 NS(fname), i);
2055                 }
2056                 /* Be sure not to retouch permissions with --fake-super. */
2057                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2058                 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2059                         continue;
2060                 fname = f_name(file, NULL);
2061                 if (fix_dir_perms)
2062                         do_chmod(fname, file->mode);
2063                 if (need_retouch_dir_times) {
2064                         STRUCT_STAT st;
2065                         if (link_stat(fname, &st, 0) == 0
2066                          && cmp_time(st.st_mtime, file->modtime) != 0)
2067                                 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
2068                 }
2069                 if (counter >= loopchk_limit) {
2070                         if (allowed_lull)
2071                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2072                         else
2073                                 maybe_flush_socket(0);
2074                         counter = 0;
2075                 }
2076         }
2077 }
2078
2079 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2080 {
2081         struct file_struct *file;
2082         struct file_list *flist;
2083         char fbuf[MAXPATHLEN];
2084         int ndx;
2085
2086         while (1) {
2087 #ifdef SUPPORT_HARD_LINKS
2088                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2089                         int send_failed = (ndx == -2);
2090                         if (send_failed)
2091                                 ndx = get_hlink_num();
2092                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2093                         file = flist->files[ndx - flist->ndx_start];
2094                         assert(file->flags & FLAG_HLINKED);
2095                         if (send_failed)
2096                                 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2097                         else
2098                                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2099                         flist->in_progress--;
2100                         continue;
2101                 }
2102 #endif
2103
2104                 if (check_redo && (ndx = get_redo_num()) != -1) {
2105                         OFF_T save_max_size = max_size;
2106                         OFF_T save_min_size = min_size;
2107                         csum_length = SUM_LENGTH;
2108                         max_size = -1;
2109                         min_size = -1;
2110                         ignore_existing = -ignore_existing;
2111                         ignore_non_existing = -ignore_non_existing;
2112                         update_only = -update_only;
2113                         always_checksum = -always_checksum;
2114                         size_only = -size_only;
2115                         append_mode = -append_mode;
2116                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2117                         ignore_times++;
2118
2119                         flist = cur_flist;
2120                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2121
2122                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2123                         if (solo_file)
2124                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2125                         else
2126                                 f_name(file, fbuf);
2127                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2128                         cur_flist->to_redo--;
2129
2130                         cur_flist = flist;
2131
2132                         csum_length = SHORT_SUM_LENGTH;
2133                         max_size = save_max_size;
2134                         min_size = save_min_size;
2135                         ignore_existing = -ignore_existing;
2136                         ignore_non_existing = -ignore_non_existing;
2137                         update_only = -update_only;
2138                         always_checksum = -always_checksum;
2139                         size_only = -size_only;
2140                         append_mode = -append_mode;
2141                         make_backups = -make_backups;
2142                         ignore_times--;
2143                         continue;
2144                 }
2145
2146                 if (cur_flist == first_flist)
2147                         break;
2148
2149                 /* We only get here if inc_recurse is enabled. */
2150                 if (first_flist->in_progress || first_flist->to_redo)
2151                         break;
2152
2153                 write_ndx(sock_f_out, NDX_DONE);
2154                 if (!read_batch && !flist_eof) {
2155                         int old_total = 0;
2156                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2157                                 old_total += flist->used;
2158                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2159                 }
2160
2161                 if (delete_during == 2 || !dir_tweaking) {
2162                         /* Skip directory touch-up. */
2163                 } else if (first_flist->parent_ndx >= 0)
2164                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2165
2166                 flist_free(first_flist); /* updates first_flist */
2167         }
2168 }
2169
2170 void generate_files(int f_out, const char *local_name)
2171 {
2172         int i, ndx, next_loopchk = 0;
2173         char fbuf[MAXPATHLEN];
2174         int itemizing;
2175         enum logcode code;
2176         int save_info_flist = info_levels[INFO_FLIST];
2177         int save_info_progress = info_levels[INFO_PROGRESS];
2178
2179         if (protocol_version >= 29) {
2180                 itemizing = 1;
2181                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2182                 code = logfile_format_has_i ? FNONE : FLOG;
2183         } else if (am_daemon) {
2184                 itemizing = logfile_format_has_i && do_xfers;
2185                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2186                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2187         } else if (!am_server) {
2188                 itemizing = stdout_format_has_i;
2189                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2190                 code = itemizing ? FNONE : FINFO;
2191         } else {
2192                 itemizing = 0;
2193                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2194                 code = FINFO;
2195         }
2196         solo_file = local_name;
2197         dir_tweaking = !(list_only || solo_file || dry_run);
2198         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2199         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2200         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2201             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2202         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2203
2204         if (DEBUG_GTE(GENR, 1))
2205                 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2206
2207         if (delete_before && !solo_file && cur_flist->used > 0)
2208                 do_delete_pass();
2209         if (delete_during == 2) {
2210                 deldelay_size = BIGPATHBUFLEN * 4;
2211                 deldelay_buf = new_array(char, deldelay_size);
2212                 if (!deldelay_buf)
2213                         out_of_memory("delete-delay");
2214         }
2215         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2216
2217         if (append_mode > 0 || whole_file < 0)
2218                 whole_file = 0;
2219         if (DEBUG_GTE(FLIST, 1)) {
2220                 rprintf(FINFO, "delta-transmission %s\n",
2221                         whole_file
2222                         ? "disabled for local transfer or --whole-file"
2223                         : "enabled");
2224         }
2225
2226         dflt_perms = (ACCESSPERMS & ~orig_umask);
2227
2228         do {
2229 #ifdef SUPPORT_HARD_LINKS
2230                 if (preserve_hard_links && inc_recurse) {
2231                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2232                                 wait_for_receiver();
2233                 }
2234 #endif
2235
2236                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2237                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2238                         if (solo_file)
2239                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2240                         else
2241                                 f_name(fp, fbuf);
2242                         ndx = cur_flist->ndx_start - 1;
2243                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2244                         if (delete_during && dry_run < 2 && !list_only
2245                          && !(fp->flags & FLAG_MISSING_DIR)) {
2246                                 if (fp->flags & FLAG_CONTENT_DIR) {
2247                                         dev_t dirdev;
2248                                         if (one_file_system) {
2249                                                 uint32 *devp = F_DIR_DEV_P(fp);
2250                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2251                                         } else
2252                                                 dirdev = MAKEDEV(0, 0);
2253                                         delete_in_dir(fbuf, fp, &dirdev);
2254                                 } else
2255                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2256                         }
2257                 }
2258                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2259                         struct file_struct *file = cur_flist->sorted[i];
2260
2261                         if (!F_IS_ACTIVE(file))
2262                                 continue;
2263
2264                         if (unsort_ndx)
2265                                 ndx = F_NDX(file);
2266                         else
2267                                 ndx = i + cur_flist->ndx_start;
2268
2269                         if (solo_file)
2270                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2271                         else
2272                                 f_name(file, fbuf);
2273                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2274
2275                         check_for_finished_files(itemizing, code, 0);
2276
2277                         if (i + cur_flist->ndx_start >= next_loopchk) {
2278                                 if (allowed_lull)
2279                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2280                                 else
2281                                         maybe_flush_socket(0);
2282                                 next_loopchk += loopchk_limit;
2283                         }
2284                 }
2285
2286                 if (!inc_recurse) {
2287                         write_ndx(f_out, NDX_DONE);
2288                         break;
2289                 }
2290
2291                 while (1) {
2292                         check_for_finished_files(itemizing, code, 1);
2293                         if (cur_flist->next || flist_eof)
2294                                 break;
2295                         wait_for_receiver();
2296                 }
2297         } while ((cur_flist = cur_flist->next) != NULL);
2298
2299         if (delete_during)
2300                 delete_in_dir(NULL, NULL, &dev_zero);
2301         phase++;
2302         if (DEBUG_GTE(GENR, 1))
2303                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2304
2305         while (1) {
2306                 check_for_finished_files(itemizing, code, 1);
2307                 if (msgdone_cnt)
2308                         break;
2309                 wait_for_receiver();
2310         }
2311
2312         phase++;
2313         if (DEBUG_GTE(GENR, 1))
2314                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2315
2316         write_ndx(f_out, NDX_DONE);
2317
2318         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2319         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2320                 write_ndx(f_out, NDX_DONE);
2321
2322         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2323                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2324                         write_del_stats(f_out);
2325                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2326                         write_ndx(f_out, NDX_DONE);
2327         }
2328
2329         /* Read MSG_DONE for the redo phase (and any prior messages). */
2330         while (1) {
2331                 check_for_finished_files(itemizing, code, 0);
2332                 if (msgdone_cnt > 1)
2333                         break;
2334                 wait_for_receiver();
2335         }
2336
2337         if (protocol_version >= 29) {
2338                 phase++;
2339                 if (DEBUG_GTE(GENR, 1))
2340                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2341                 if (!EARLY_DELAY_DONE_MSG()) {
2342                         write_ndx(f_out, NDX_DONE);
2343                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2344                                 write_ndx(f_out, NDX_DONE);
2345                 }
2346                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2347                 while (msgdone_cnt == 2)
2348                         wait_for_receiver();
2349         }
2350
2351         info_levels[INFO_FLIST] = save_info_flist;
2352         info_levels[INFO_PROGRESS] = save_info_progress;
2353
2354         if (delete_during == 2)
2355                 do_delayed_deletions(fbuf);
2356         if (delete_after && !solo_file && file_total > 0)
2357                 do_delete_pass();
2358
2359         if (max_delete >= 0 && skipped_deletes) {
2360                 rprintf(FWARNING,
2361                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2362                         skipped_deletes);
2363                 io_error |= IOERR_DEL_LIMIT;
2364         }
2365
2366         if (protocol_version >= 31) {
2367                 if (!EARLY_DELETE_DONE_MSG()) {
2368                         if (INFO_GTE(STATS, 2) || read_batch)
2369                                 write_del_stats(f_out);
2370                         write_ndx(f_out, NDX_DONE);
2371                 }
2372
2373                 /* Read MSG_DONE for late-delete phase & prior messages. */
2374                 while (msgdone_cnt == 3)
2375                         wait_for_receiver();
2376         }
2377
2378         if ((need_retouch_dir_perms || need_retouch_dir_times)
2379          && dir_tweaking && (!inc_recurse || delete_during == 2))
2380                 touch_up_dirs(dir_flist, -1);
2381
2382         if (DEBUG_GTE(GENR, 1))
2383                 rprintf(FINFO, "generate_files finished\n");
2384 }