762391d76e19dbe3397aed6e673cd5516d8dc3f1
[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) 2003-2008 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
25 extern int verbose;
26 extern int dry_run;
27 extern int do_xfers;
28 extern int stdout_format_has_i;
29 extern int logfile_format_has_i;
30 extern int am_root;
31 extern int am_server;
32 extern int am_daemon;
33 extern int inc_recurse;
34 extern int do_progress;
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 uid_ndx;
48 extern int gid_ndx;
49 extern int delete_mode;
50 extern int delete_before;
51 extern int delete_during;
52 extern int delete_after;
53 extern int msgdone_cnt;
54 extern int ignore_errors;
55 extern int remove_source_files;
56 extern int delay_updates;
57 extern int update_only;
58 extern int ignore_existing;
59 extern int ignore_non_existing;
60 extern int inplace;
61 extern int append_mode;
62 extern int make_backups;
63 extern int csum_length;
64 extern int ignore_times;
65 extern int size_only;
66 extern OFF_T max_size;
67 extern OFF_T min_size;
68 extern int io_error;
69 extern int flist_eof;
70 extern int allowed_lull;
71 extern int sock_f_out;
72 extern int ignore_timeout;
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 char *basis_dir[];
80 extern int compare_dest;
81 extern int copy_dest;
82 extern int link_dest;
83 extern int whole_file;
84 extern int list_only;
85 extern int read_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 struct stats stats;
93 extern dev_t filesystem_dev;
94 extern mode_t orig_umask;
95 extern uid_t our_uid;
96 extern char *backup_dir;
97 extern char *backup_suffix;
98 extern int backup_suffix_len;
99 extern struct file_list *cur_flist, *first_flist, *dir_flist;
100 extern struct filter_list_struct daemon_filter_list;
101
102 int ignore_perishable = 0;
103 int non_perishable_cnt = 0;
104 int maybe_ATTRS_REPORT = 0;
105
106 static dev_t dev_zero;
107 static int deletion_count = 0; /* used to implement --max-delete */
108 static int deldelay_size = 0, deldelay_cnt = 0;
109 static char *deldelay_buf = NULL;
110 static int deldelay_fd = -1;
111 static int loopchk_limit;
112 static int dir_tweaking;
113 static int symlink_timeset_failed_flags;
114 static int need_retouch_dir_times;
115 static int need_retouch_dir_perms;
116 static const char *solo_file = NULL;
117
118 /* For calling delete_item() and delete_dir_contents(). */
119 #define DEL_NO_UID_WRITE        (1<<0) /* file/dir has our uid w/o write perm */
120 #define DEL_RECURSE             (1<<1) /* if dir, delete all contents */
121 #define DEL_DIR_IS_EMPTY        (1<<2) /* internal delete_FUNCTIONS use only */
122 #define DEL_FOR_FILE            (1<<3) /* making room for a replacement file */
123 #define DEL_FOR_DIR             (1<<4) /* making room for a replacement dir */
124 #define DEL_FOR_SYMLINK         (1<<5) /* making room for a replacement symlink */
125 #define DEL_FOR_DEVICE          (1<<6) /* making room for a replacement device */
126 #define DEL_FOR_SPECIAL         (1<<7) /* making room for a replacement special */
127
128 #define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL)
129
130 enum nonregtype {
131     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
132 };
133
134 enum delret {
135     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
136 };
137
138 /* Forward declarations. */
139 static enum delret delete_dir_contents(char *fname, uint16 flags);
140 #ifdef SUPPORT_HARD_LINKS
141 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
142                                  enum logcode code, int f_out);
143 #endif
144
145 static int is_backup_file(char *fn)
146 {
147         int k = strlen(fn) - backup_suffix_len;
148         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
149 }
150
151 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
152  * delete recursively.
153  *
154  * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
155  * a directory! (The buffer is used for recursion, but returned unchanged.)
156  */
157 static enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
158 {
159         enum delret ret;
160         char *what;
161         int ok;
162
163         if (verbose > 2) {
164                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
165                         fbuf, (int)mode, (int)flags);
166         }
167
168         if (flags & DEL_NO_UID_WRITE)
169                 do_chmod(fbuf, mode | S_IWUSR);
170
171         if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
172                 int save_uid_ndx = uid_ndx;
173                 /* This only happens on the first call to delete_item() since
174                  * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
175                 if (!uid_ndx)
176                         uid_ndx = ++file_extra_cnt;
177                 ignore_perishable = 1;
178                 /* If DEL_RECURSE is not set, this just reports emptiness. */
179                 ret = delete_dir_contents(fbuf, flags);
180                 ignore_perishable = 0;
181                 if (!save_uid_ndx) {
182                         --file_extra_cnt;
183                         uid_ndx = 0;
184                 }
185                 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
186                         goto check_ret;
187                 /* OK: try to delete the directory. */
188         }
189
190         if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && ++deletion_count > max_delete)
191                 return DR_AT_LIMIT;
192
193         if (S_ISDIR(mode)) {
194                 what = "rmdir";
195                 ok = do_rmdir(fbuf) == 0;
196         } else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
197                 what = "make_backup";
198                 ok = make_backup(fbuf);
199         } else {
200                 what = "unlink";
201                 ok = robust_unlink(fbuf) == 0;
202         }
203
204         if (ok) {
205                 if (!(flags & DEL_MAKE_ROOM))
206                         log_delete(fbuf, mode);
207                 ret = DR_SUCCESS;
208         } else {
209                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
210                         rprintf(FINFO, "cannot delete non-empty directory: %s\n",
211                                 fbuf);
212                         ret = DR_NOT_EMPTY;
213                 } else if (errno != ENOENT) {
214                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
215                                 what, fbuf);
216                         ret = DR_FAILURE;
217                 } else {
218                         deletion_count--;
219                         ret = DR_SUCCESS;
220                 }
221         }
222
223   check_ret:
224         if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
225                 const char *desc;
226                 switch (flags & DEL_MAKE_ROOM) {
227                 case DEL_FOR_FILE: desc = "regular file"; break;
228                 case DEL_FOR_DIR: desc = "directory"; break;
229                 case DEL_FOR_SYMLINK: desc = "symlink"; break;
230                 case DEL_FOR_DEVICE: desc = "device file"; break;
231                 case DEL_FOR_SPECIAL: desc = "special file"; break;
232                 default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
233                 }
234                 rprintf(FERROR_XFER, "could not make way for new %s: %s\n",
235                         desc, fbuf);
236         }
237         return ret;
238 }
239
240 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
241  * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
242  * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
243  * buffer is used for recursion, but returned unchanged.)
244  */
245 static enum delret delete_dir_contents(char *fname, uint16 flags)
246 {
247         struct file_list *dirlist;
248         enum delret ret;
249         unsigned remainder;
250         void *save_filters;
251         int j, dlen;
252         char *p;
253
254         if (verbose > 3) {
255                 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
256                         fname, flags);
257         }
258
259         dlen = strlen(fname);
260         save_filters = push_local_filters(fname, dlen);
261
262         non_perishable_cnt = 0;
263         dirlist = get_dirlist(fname, dlen, 0);
264         ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
265
266         if (!dirlist->used)
267                 goto done;
268
269         if (!(flags & DEL_RECURSE)) {
270                 ret = DR_NOT_EMPTY;
271                 goto done;
272         }
273
274         p = fname + dlen;
275         if (dlen != 1 || *fname != '/')
276                 *p++ = '/';
277         remainder = MAXPATHLEN - (p - fname);
278
279         /* We do our own recursion, so make delete_item() non-recursive. */
280         flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
281               | DEL_DIR_IS_EMPTY;
282
283         for (j = dirlist->used; j--; ) {
284                 struct file_struct *fp = dirlist->files[j];
285
286                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
287                         if (verbose > 1) {
288                                 rprintf(FINFO,
289                                     "mount point, %s, pins parent directory\n",
290                                     f_name(fp, NULL));
291                         }
292                         ret = DR_NOT_EMPTY;
293                         continue;
294                 }
295
296                 strlcpy(p, fp->basename, remainder);
297                 if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
298                         do_chmod(fname, fp->mode | S_IWUSR);
299                 /* Save stack by recursing to ourself directly. */
300                 if (S_ISDIR(fp->mode)) {
301                         if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
302                                 ret = DR_NOT_EMPTY;
303                 }
304                 if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
305                         ret = DR_NOT_EMPTY;
306         }
307
308         fname[dlen] = '\0';
309
310   done:
311         flist_free(dirlist);
312         pop_local_filters(save_filters);
313
314         if (ret == DR_NOT_EMPTY) {
315                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
316                         fname);
317         }
318         return ret;
319 }
320
321 static int start_delete_delay_temp(void)
322 {
323         char fnametmp[MAXPATHLEN];
324         int save_dry_run = dry_run;
325
326         dry_run = 0;
327         if (!get_tmpname(fnametmp, "deldelay")
328          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
329                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
330                         inc_recurse ? "" : " -- switching to --delete-after");
331                 delete_during = 0;
332                 delete_after = !inc_recurse;
333                 dry_run = save_dry_run;
334                 return 0;
335         }
336         unlink(fnametmp);
337         dry_run = save_dry_run;
338         return 1;
339 }
340
341 static int flush_delete_delay(void)
342 {
343         if (deldelay_fd < 0 && !start_delete_delay_temp())
344                 return 0;
345         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
346                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
347                 delete_during = 0;
348                 delete_after = !inc_recurse;
349                 close(deldelay_fd);
350                 return 0;
351         }
352         deldelay_cnt = 0;
353         return 1;
354 }
355
356 static int remember_delete(struct file_struct *file, const char *fname, int flags)
357 {
358         int len;
359
360         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
361                 return 0;
362
363         if (flags & DEL_NO_UID_WRITE)
364                 deldelay_buf[deldelay_cnt++] = '!';
365
366         while (1) {
367                 len = snprintf(deldelay_buf + deldelay_cnt,
368                                deldelay_size - deldelay_cnt,
369                                "%x %s%c",
370                                (int)file->mode, fname, '\0');
371                 if ((deldelay_cnt += len) <= deldelay_size)
372                         break;
373                 deldelay_cnt -= len;
374                 if (!flush_delete_delay())
375                         return 0;
376         }
377
378         return 1;
379 }
380
381 static int read_delay_line(char *buf, int *flags_p)
382 {
383         static int read_pos = 0;
384         int j, len, mode;
385         char *bp, *past_space;
386
387         while (1) {
388                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
389                 if (j < deldelay_cnt)
390                         break;
391                 if (deldelay_fd < 0) {
392                         if (j > read_pos)
393                                 goto invalid_data;
394                         return -1;
395                 }
396                 deldelay_cnt -= read_pos;
397                 if (deldelay_cnt == deldelay_size)
398                         goto invalid_data;
399                 if (deldelay_cnt && read_pos) {
400                         memmove(deldelay_buf, deldelay_buf + read_pos,
401                                 deldelay_cnt);
402                 }
403                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
404                            deldelay_size - deldelay_cnt);
405                 if (len == 0) {
406                         if (deldelay_cnt) {
407                                 rprintf(FERROR,
408                                     "ERROR: unexpected EOF in delete-delay file.\n");
409                         }
410                         return -1;
411                 }
412                 if (len < 0) {
413                         rsyserr(FERROR, errno,
414                                 "reading delete-delay file");
415                         return -1;
416                 }
417                 deldelay_cnt += len;
418                 read_pos = 0;
419         }
420
421         bp = deldelay_buf + read_pos;
422         if (*bp == '!') {
423                 bp++;
424                 *flags_p = DEL_NO_UID_WRITE;
425         } else
426                 *flags_p = 0;
427
428         if (sscanf(bp, "%x ", &mode) != 1) {
429           invalid_data:
430                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
431                 return -1;
432         }
433         past_space = strchr(bp, ' ') + 1;
434         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
435         read_pos = j + 1;
436
437         if (len > MAXPATHLEN) {
438                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
439                 return -1;
440         }
441
442         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
443          * instead of returning a pointer to our buffer. */
444         memcpy(buf, past_space, len);
445
446         return mode;
447 }
448
449 static void do_delayed_deletions(char *delbuf)
450 {
451         int mode, flags;
452
453         if (deldelay_fd >= 0) {
454                 if (deldelay_cnt && !flush_delete_delay())
455                         return;
456                 lseek(deldelay_fd, 0, 0);
457         }
458         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
459                 delete_item(delbuf, mode, flags | DEL_RECURSE);
460         if (deldelay_fd >= 0)
461                 close(deldelay_fd);
462 }
463
464 /* This function is used to implement per-directory deletion, and is used by
465  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
466  * MAXPATHLEN buffer with the name of the directory in it (the functions we
467  * call will append names onto the end, but the old dir value will be restored
468  * on exit). */
469 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
470 {
471         static int already_warned = 0;
472         struct file_list *dirlist;
473         char delbuf[MAXPATHLEN];
474         int dlen, i;
475         int save_uid_ndx = uid_ndx;
476
477         if (!fbuf) {
478                 change_local_filter_dir(NULL, 0, 0);
479                 return;
480         }
481
482         if (verbose > 2)
483                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
484
485         if (allowed_lull)
486                 maybe_send_keepalive();
487
488         if (io_error && !ignore_errors) {
489                 if (already_warned)
490                         return;
491                 rprintf(FINFO,
492                         "IO error encountered -- skipping file deletion\n");
493                 already_warned = 1;
494                 return;
495         }
496
497         dlen = strlen(fbuf);
498         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
499
500         if (one_file_system) {
501                 if (file->flags & FLAG_TOP_DIR)
502                         filesystem_dev = *fs_dev;
503                 else if (filesystem_dev != *fs_dev)
504                         return;
505         }
506
507         if (!uid_ndx)
508                 uid_ndx = ++file_extra_cnt;
509
510         dirlist = get_dirlist(fbuf, dlen, 0);
511
512         /* If an item in dirlist is not found in flist, delete it
513          * from the filesystem. */
514         for (i = dirlist->used; i--; ) {
515                 struct file_struct *fp = dirlist->files[i];
516                 if (!F_IS_ACTIVE(fp))
517                         continue;
518                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
519                         if (verbose > 1)
520                                 rprintf(FINFO, "cannot delete mount point: %s\n",
521                                         f_name(fp, NULL));
522                         continue;
523                 }
524                 if (flist_find(cur_flist, fp) < 0) {
525                         int flags = DEL_RECURSE;
526                         if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
527                                 flags |= DEL_NO_UID_WRITE;
528                         f_name(fp, delbuf);
529                         if (delete_during == 2) {
530                                 if (!remember_delete(fp, delbuf, flags))
531                                         break;
532                         } else
533                                 delete_item(delbuf, fp->mode, flags);
534                 }
535         }
536
537         flist_free(dirlist);
538
539         if (!save_uid_ndx) {
540                 --file_extra_cnt;
541                 uid_ndx = 0;
542         }
543 }
544
545 /* This deletes any files on the receiving side that are not present on the
546  * sending side.  This is used by --delete-before and --delete-after. */
547 static void do_delete_pass(void)
548 {
549         char fbuf[MAXPATHLEN];
550         STRUCT_STAT st;
551         int j;
552
553         /* dry_run is incremented when the destination doesn't exist yet. */
554         if (dry_run > 1 || list_only)
555                 return;
556
557         for (j = 0; j < cur_flist->used; j++) {
558                 struct file_struct *file = cur_flist->sorted[j];
559
560                 f_name(file, fbuf);
561
562                 if (!(file->flags & FLAG_CONTENT_DIR)) {
563                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
564                         continue;
565                 }
566
567                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
568                         rprintf(FINFO, "deleting in %s\n", fbuf);
569
570                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
571                  || !S_ISDIR(st.st_mode))
572                         continue;
573
574                 delete_in_dir(fbuf, file, &st.st_dev);
575         }
576         delete_in_dir(NULL, NULL, &dev_zero);
577
578         if (do_progress && !am_server)
579                 rprintf(FINFO, "                    \r");
580 }
581
582 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
583 {
584 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
585         if (S_ISLNK(file->mode)) {
586                 ;
587         } else
588 #endif
589         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
590                 return 0;
591
592         if (preserve_perms) {
593                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
594                         return 0;
595         } else if (preserve_executability
596          && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
597                 return 0;
598
599         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
600                 return 0;
601
602         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
603                 return 0;
604
605 #ifdef SUPPORT_ACLS
606         if (preserve_acls && !S_ISLNK(file->mode)) {
607                 if (!ACL_READY(*sxp))
608                         get_acl(fname, sxp);
609                 if (set_acl(NULL, file, sxp) == 0)
610                         return 0;
611         }
612 #endif
613 #ifdef SUPPORT_XATTRS
614         if (preserve_xattrs) {
615                 if (!XATTR_READY(*sxp))
616                         get_xattr(fname, sxp);
617                 if (xattr_diff(file, sxp, 0))
618                         return 0;
619         }
620 #endif
621
622         return 1;
623 }
624
625 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
626              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
627              const char *xname)
628 {
629         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
630                 int keep_time = !preserve_times ? 0
631                     : S_ISDIR(file->mode) ? preserve_times > 1 :
632 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
633                     1;
634 #else
635                     !S_ISLNK(file->mode);
636 #endif
637
638                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
639                         iflags |= ITEM_REPORT_SIZE;
640                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
641                         if (iflags & ITEM_LOCAL_CHANGE)
642                                 iflags |= symlink_timeset_failed_flags;
643                 } else if (keep_time
644                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
645                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
646                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
647                         iflags |= ITEM_REPORT_TIME;
648 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
649                 if (S_ISLNK(file->mode)) {
650                         ;
651                 } else
652 #endif
653                 if (preserve_perms) {
654                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
655                                 iflags |= ITEM_REPORT_PERMS;
656                 } else if (preserve_executability
657                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
658                         iflags |= ITEM_REPORT_PERMS;
659                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
660                         iflags |= ITEM_REPORT_OWNER;
661                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
662                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
663                         iflags |= ITEM_REPORT_GROUP;
664 #ifdef SUPPORT_ACLS
665                 if (preserve_acls && !S_ISLNK(file->mode)) {
666                         if (!ACL_READY(*sxp))
667                                 get_acl(fnamecmp, sxp);
668                         if (set_acl(NULL, file, sxp) == 0)
669                                 iflags |= ITEM_REPORT_ACL;
670                 }
671 #endif
672 #ifdef SUPPORT_XATTRS
673                 if (preserve_xattrs) {
674                         if (!XATTR_READY(*sxp))
675                                 get_xattr(fnamecmp, sxp);
676                         if (xattr_diff(file, sxp, 1))
677                                 iflags |= ITEM_REPORT_XATTR;
678                 }
679 #endif
680         } else {
681 #ifdef SUPPORT_XATTRS
682                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
683                         iflags |= ITEM_REPORT_XATTR;
684 #endif
685                 iflags |= ITEM_IS_NEW;
686         }
687
688         iflags &= 0xffff;
689         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
690           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
691                 if (protocol_version >= 29) {
692                         if (ndx >= 0)
693                                 write_ndx(sock_f_out, ndx);
694                         write_shortint(sock_f_out, iflags);
695                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
696                                 write_byte(sock_f_out, fnamecmp_type);
697                         if (iflags & ITEM_XNAME_FOLLOWS)
698                                 write_vstring(sock_f_out, xname, strlen(xname));
699 #ifdef SUPPORT_XATTRS
700                         if (preserve_xattrs && !dry_run
701                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
702                                 send_xattr_request(NULL, file,
703                                         iflags & ITEM_REPORT_XATTR ? sock_f_out : -1);
704                         }
705 #endif
706                 } else if (ndx >= 0) {
707                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
708                         log_item(code, file, &stats, iflags, xname);
709                 }
710         }
711 }
712
713
714 /* Perform our quick-check heuristic for determining if a file is unchanged. */
715 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
716 {
717         if (st->st_size != F_LENGTH(file))
718                 return 0;
719
720         /* if always checksum is set then we use the checksum instead
721            of the file time to determine whether to sync */
722         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
723                 char sum[MAX_DIGEST_LEN];
724                 file_checksum(fn, sum, st->st_size);
725                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
726         }
727
728         if (size_only > 0)
729                 return 1;
730
731         if (ignore_times)
732                 return 0;
733
734         return cmp_time(st->st_mtime, file->modtime) == 0;
735 }
736
737
738 /*
739  * set (initialize) the size entries in the per-file sum_struct
740  * calculating dynamic block and checksum sizes.
741  *
742  * This is only called from generate_and_send_sums() but is a separate
743  * function to encapsulate the logic.
744  *
745  * The block size is a rounded square root of file length.
746  *
747  * The checksum size is determined according to:
748  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
749  * provided by Donovan Baarda which gives a probability of rsync
750  * algorithm corrupting data and falling back using the whole md4
751  * checksums.
752  *
753  * This might be made one of several selectable heuristics.
754  */
755 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
756 {
757         int32 blength;
758         int s2length;
759         int64 l;
760
761         if (block_size)
762                 blength = block_size;
763         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
764                 blength = BLOCK_SIZE;
765         else {
766                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
767                 int32 c;
768                 int cnt;
769                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
770                 if (c < 0 || c >= max_blength)
771                         blength = max_blength;
772                 else {
773                     blength = 0;
774                     do {
775                             blength |= c;
776                             if (len < (int64)blength * blength)
777                                     blength &= ~c;
778                             c >>= 1;
779                     } while (c >= 8);   /* round to multiple of 8 */
780                     blength = MAX(blength, BLOCK_SIZE);
781                 }
782         }
783
784         if (protocol_version < 27) {
785                 s2length = csum_length;
786         } else if (csum_length == SUM_LENGTH) {
787                 s2length = SUM_LENGTH;
788         } else {
789                 int32 c;
790                 int b = BLOCKSUM_BIAS;
791                 for (l = len; l >>= 1; b += 2) {}
792                 for (c = blength; (c >>= 1) && b; b--) {}
793                 /* add a bit, subtract rollsum, round up. */
794                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
795                 s2length = MAX(s2length, csum_length);
796                 s2length = MIN(s2length, SUM_LENGTH);
797         }
798
799         sum->flength    = len;
800         sum->blength    = blength;
801         sum->s2length   = s2length;
802         sum->remainder  = (int32)(len % blength);
803         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
804
805         if ((int64)sum->count != l)
806                 sum->count = -1;
807
808         if (sum->count && verbose > 2) {
809                 rprintf(FINFO,
810                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
811                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
812                         sum->s2length, (double)sum->flength);
813         }
814 }
815
816
817 /*
818  * Generate and send a stream of signatures/checksums that describe a buffer
819  *
820  * Generate approximately one checksum every block_len bytes.
821  */
822 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
823 {
824         int32 i;
825         struct map_struct *mapbuf;
826         struct sum_struct sum;
827         OFF_T offset = 0;
828
829         sum_sizes_sqroot(&sum, len);
830         if (sum.count < 0)
831                 return -1;
832         write_sum_head(f_out, &sum);
833
834         if (append_mode > 0 && f_copy < 0)
835                 return 0;
836
837         if (len > 0)
838                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
839         else
840                 mapbuf = NULL;
841
842         for (i = 0; i < sum.count; i++) {
843                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
844                 char *map = map_ptr(mapbuf, offset, n1);
845                 char sum2[SUM_LENGTH];
846                 uint32 sum1;
847
848                 len -= n1;
849                 offset += n1;
850
851                 if (f_copy >= 0) {
852                         full_write(f_copy, map, n1);
853                         if (append_mode > 0)
854                                 continue;
855                 }
856
857                 sum1 = get_checksum1(map, n1);
858                 get_checksum2(map, n1, sum2);
859
860                 if (verbose > 3) {
861                         rprintf(FINFO,
862                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
863                                 (double)i, (double)offset - n1, (long)n1,
864                                 (unsigned long)sum1);
865                 }
866                 write_int(f_out, sum1);
867                 write_buf(f_out, sum2, sum.s2length);
868         }
869
870         if (mapbuf)
871                 unmap_file(mapbuf);
872
873         return 0;
874 }
875
876
877 /* Try to find a filename in the same dir as "fname" with a similar name. */
878 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
879 {
880         int fname_len, fname_suf_len;
881         const char *fname_suf, *fname = file->basename;
882         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
883         int j, lowest_j = -1;
884
885         fname_len = strlen(fname);
886         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
887
888         for (j = 0; j < dirlist->used; j++) {
889                 struct file_struct *fp = dirlist->files[j];
890                 const char *suf, *name;
891                 int len, suf_len;
892                 uint32 dist;
893
894                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
895                  || fp->flags & FLAG_FILE_SENT)
896                         continue;
897
898                 name = fp->basename;
899
900                 if (F_LENGTH(fp) == F_LENGTH(file)
901                     && cmp_time(fp->modtime, file->modtime) == 0) {
902                         if (verbose > 4) {
903                                 rprintf(FINFO,
904                                         "fuzzy size/modtime match for %s\n",
905                                         name);
906                         }
907                         return j;
908                 }
909
910                 len = strlen(name);
911                 suf = find_filename_suffix(name, len, &suf_len);
912
913                 dist = fuzzy_distance(name, len, fname, fname_len);
914                 /* Add some extra weight to how well the suffixes match. */
915                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
916                       * 10;
917                 if (verbose > 4) {
918                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
919                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
920                 }
921                 if (dist <= lowest_dist) {
922                         lowest_dist = dist;
923                         lowest_j = j;
924                 }
925         }
926
927         return lowest_j;
928 }
929
930 /* Copy a file found in our --copy-dest handling. */
931 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
932 {
933         char buf[MAXPATHLEN];
934         const char *copy_to, *partialptr;
935         int save_preserve_xattrs = preserve_xattrs;
936         int ok, fd_w;
937
938         if (inplace) {
939                 /* Let copy_file open the destination in place. */
940                 fd_w = -1;
941                 copy_to = dest;
942         } else {
943                 fd_w = open_tmpfile(buf, dest, file);
944                 if (fd_w < 0)
945                         return -1;
946                 copy_to = buf;
947         }
948         cleanup_set(copy_to, NULL, NULL, -1, -1);
949         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
950                 if (verbose) {
951                         rsyserr(FINFO, errno, "copy_file %s => %s",
952                                 full_fname(src), copy_to);
953                 }
954                 /* Try to clean up. */
955                 unlink(copy_to);
956                 cleanup_disable();
957                 return -1;
958         }
959         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
960         preserve_xattrs = 0; /* xattrs were copied with file */
961         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
962         preserve_xattrs = save_preserve_xattrs;
963         cleanup_disable();
964         return ok ? 0 : -1;
965 }
966
967 /* This is only called for regular files.  We return -2 if we've finished
968  * handling the file, -1 if no dest-linking occurred, or a non-negative
969  * value if we found an alternate basis file. */
970 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
971                          char *cmpbuf, stat_x *sxp, int itemizing,
972                          enum logcode code)
973 {
974         int best_match = -1;
975         int match_level = 0;
976         int j = 0;
977
978         do {
979                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
980                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
981                         continue;
982                 switch (match_level) {
983                 case 0:
984                         best_match = j;
985                         match_level = 1;
986                         /* FALL THROUGH */
987                 case 1:
988                         if (!unchanged_file(cmpbuf, file, &sxp->st))
989                                 continue;
990                         best_match = j;
991                         match_level = 2;
992                         /* FALL THROUGH */
993                 case 2:
994                         if (!unchanged_attrs(cmpbuf, file, sxp))
995                                 continue;
996                         best_match = j;
997                         match_level = 3;
998                         break;
999                 }
1000                 break;
1001         } while (basis_dir[++j] != NULL);
1002
1003         if (!match_level)
1004                 return -1;
1005
1006         if (j != best_match) {
1007                 j = best_match;
1008                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1009                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1010                         return -1;
1011         }
1012
1013         if (match_level == 3 && !copy_dest) {
1014 #ifdef SUPPORT_HARD_LINKS
1015                 if (link_dest) {
1016                         if (!hard_link_one(file, fname, cmpbuf, 1))
1017                                 goto try_a_copy;
1018                         if (preserve_hard_links && F_IS_HLINKED(file))
1019                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
1020                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
1021                                 itemize(cmpbuf, file, ndx, 1, sxp,
1022                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
1023                                         0, "");
1024                         }
1025                 } else
1026 #endif
1027                 if (itemizing)
1028                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1029                 if (verbose > 1 && maybe_ATTRS_REPORT)
1030                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1031                 return -2;
1032         }
1033
1034         if (match_level >= 2) {
1035 #ifdef SUPPORT_HARD_LINKS
1036           try_a_copy: /* Copy the file locally. */
1037 #endif
1038                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
1039                         return -1;
1040                 if (itemizing)
1041                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1042                 if (maybe_ATTRS_REPORT
1043                  && ((!itemizing && verbose && match_level == 2)
1044                   || (verbose > 1 && match_level == 3))) {
1045                         code = match_level == 3 ? FCLIENT : FINFO;
1046                         rprintf(code, "%s%s\n", fname,
1047                                 match_level == 3 ? " is uptodate" : "");
1048                 }
1049 #ifdef SUPPORT_HARD_LINKS
1050                 if (preserve_hard_links && F_IS_HLINKED(file))
1051                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1052 #endif
1053                 return -2;
1054         }
1055
1056         return FNAMECMP_BASIS_DIR_LOW + j;
1057 }
1058
1059 /* This is only called for non-regular files.  We return -2 if we've finished
1060  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1061  * value if we found an alternate basis file. */
1062 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1063                          char *cmpbuf, stat_x *sxp, int itemizing,
1064                          enum logcode code)
1065 {
1066         char lnk[MAXPATHLEN];
1067         int best_match = -1;
1068         int match_level = 0;
1069         enum nonregtype type;
1070         uint32 *devp;
1071         int len, j = 0;
1072
1073 #ifndef SUPPORT_LINKS
1074         if (S_ISLNK(file->mode))
1075                 return -1;
1076 #endif
1077         if (S_ISDIR(file->mode)) {
1078                 type = TYPE_DIR;
1079         } else if (IS_SPECIAL(file->mode))
1080                 type = TYPE_SPECIAL;
1081         else if (IS_DEVICE(file->mode))
1082                 type = TYPE_DEVICE;
1083 #ifdef SUPPORT_LINKS
1084         else if (S_ISLNK(file->mode))
1085                 type = TYPE_SYMLINK;
1086 #endif
1087         else {
1088                 rprintf(FERROR,
1089                         "internal: try_dests_non() called with invalid mode (%o)\n",
1090                         (int)file->mode);
1091                 exit_cleanup(RERR_UNSUPPORTED);
1092         }
1093
1094         do {
1095                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1096                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1097                         continue;
1098                 switch (type) {
1099                 case TYPE_DIR:
1100                         if (!S_ISDIR(sxp->st.st_mode))
1101                                 continue;
1102                         break;
1103                 case TYPE_SPECIAL:
1104                         if (!IS_SPECIAL(sxp->st.st_mode))
1105                                 continue;
1106                         break;
1107                 case TYPE_DEVICE:
1108                         if (!IS_DEVICE(sxp->st.st_mode))
1109                                 continue;
1110                         break;
1111 #ifdef SUPPORT_LINKS
1112                 case TYPE_SYMLINK:
1113                         if (!S_ISLNK(sxp->st.st_mode))
1114                                 continue;
1115                         break;
1116 #endif
1117                 }
1118                 if (match_level < 1) {
1119                         match_level = 1;
1120                         best_match = j;
1121                 }
1122                 switch (type) {
1123                 case TYPE_DIR:
1124                         break;
1125                 case TYPE_SPECIAL:
1126                 case TYPE_DEVICE:
1127                         devp = F_RDEV_P(file);
1128                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1129                                 continue;
1130                         break;
1131 #ifdef SUPPORT_LINKS
1132                 case TYPE_SYMLINK:
1133                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1134                                 continue;
1135                         lnk[len] = '\0';
1136                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1137                                 continue;
1138                         break;
1139 #endif
1140                 }
1141                 if (match_level < 2) {
1142                         match_level = 2;
1143                         best_match = j;
1144                 }
1145                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1146                         match_level = 3;
1147                         best_match = j;
1148                         break;
1149                 }
1150         } while (basis_dir[++j] != NULL);
1151
1152         if (!match_level)
1153                 return -1;
1154
1155         if (j != best_match) {
1156                 j = best_match;
1157                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1158                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1159                         return -1;
1160         }
1161
1162         if (match_level == 3) {
1163 #ifdef SUPPORT_HARD_LINKS
1164                 if (link_dest
1165 #ifndef CAN_HARDLINK_SYMLINK
1166                  && !S_ISLNK(file->mode)
1167 #endif
1168 #ifndef CAN_HARDLINK_SPECIAL
1169                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1170 #endif
1171                  && !S_ISDIR(file->mode)) {
1172                         if (do_link(cmpbuf, fname) < 0) {
1173                                 rsyserr(FERROR_XFER, errno,
1174                                         "failed to hard-link %s with %s",
1175                                         cmpbuf, fname);
1176                                 return j;
1177                         }
1178                         if (preserve_hard_links && F_IS_HLINKED(file))
1179                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1180                 } else
1181 #endif
1182                         match_level = 2;
1183                 if (itemizing && stdout_format_has_i
1184                  && (verbose > 1 || stdout_format_has_i > 1)) {
1185                         int chg = compare_dest && type != TYPE_DIR ? 0
1186                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1187                         char *lp = match_level == 3 ? "" : NULL;
1188                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1189                 }
1190                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1191                         rprintf(FCLIENT, "%s%s is uptodate\n",
1192                                 fname, type == TYPE_DIR ? "/" : "");
1193                 }
1194                 return -2;
1195         }
1196
1197         return j;
1198 }
1199
1200 static void list_file_entry(struct file_struct *f)
1201 {
1202         char permbuf[PERMSTRING_SIZE];
1203         double len;
1204
1205         if (!F_IS_ACTIVE(f)) {
1206                 /* this can happen if duplicate names were removed */
1207                 return;
1208         }
1209
1210         permstring(permbuf, f->mode);
1211         len = F_LENGTH(f);
1212
1213         /* TODO: indicate '+' if the entry has an ACL. */
1214
1215 #ifdef SUPPORT_LINKS
1216         if (preserve_links && S_ISLNK(f->mode)) {
1217                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1218                         permbuf, len, timestring(f->modtime),
1219                         f_name(f, NULL), F_SYMLINK(f));
1220         } else
1221 #endif
1222         {
1223                 rprintf(FINFO, "%s %11.0f %s %s\n",
1224                         permbuf, len, timestring(f->modtime),
1225                         f_name(f, NULL));
1226         }
1227 }
1228
1229 static int phase = 0;
1230 static int dflt_perms;
1231
1232 static int implied_dirs_are_missing;
1233 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1234 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1235 {
1236         return F_DEPTH(file) > F_DEPTH(subtree)
1237                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1238 }
1239
1240 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1241  * make sure it exists, and has the right permissions/timestamp info.  For
1242  * all other non-regular files (symlinks, etc.) we create them here.  For
1243  * regular files that have changed, we try to find a basis file and then
1244  * start sending checksums.  The ndx is the file's unique index value.
1245  *
1246  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1247  * passed to delete_item(), which can use it during a recursive delete.)
1248  *
1249  * Note that f_out is set to -1 when doing final directory-permission and
1250  * modification-time repair. */
1251 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1252                            int itemizing, enum logcode code, int f_out)
1253 {
1254         static const char *parent_dirname = "";
1255         /* Missing dir not created due to --dry-run; will still be scanned. */
1256         static struct file_struct *dry_missing_dir = NULL;
1257         /* Missing dir whose contents are skipped altogether due to
1258          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1259         static struct file_struct *skip_dir = NULL;
1260         static struct file_list *fuzzy_dirlist = NULL;
1261         static int need_fuzzy_dirlist = 0;
1262         struct file_struct *fuzzy_file = NULL;
1263         int fd = -1, f_copy = -1;
1264         stat_x sx, real_sx;
1265         STRUCT_STAT partial_st;
1266         struct file_struct *back_file = NULL;
1267         int statret, real_ret, stat_errno;
1268         char *fnamecmp, *partialptr, *backupptr = NULL;
1269         char fnamecmpbuf[MAXPATHLEN];
1270         uchar fnamecmp_type;
1271         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1272         int is_dir = !S_ISDIR(file->mode) ? 0
1273                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1274                    : 1;
1275
1276         if (verbose > 2)
1277                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1278
1279         if (list_only) {
1280                 if (is_dir < 0
1281                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1282                         return;
1283                 list_file_entry(file);
1284                 return;
1285         }
1286
1287         if (skip_dir) {
1288                 if (is_below(file, skip_dir)) {
1289                         if (is_dir)
1290                                 file->flags |= FLAG_MISSING_DIR;
1291 #ifdef SUPPORT_HARD_LINKS
1292                         else if (F_IS_HLINKED(file))
1293                                 handle_skipped_hlink(file, itemizing, code, f_out);
1294 #endif
1295                         return;
1296                 }
1297                 skip_dir = NULL;
1298         }
1299
1300         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1301                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1302                         if (is_dir < 0)
1303                                 return;
1304 #ifdef SUPPORT_HARD_LINKS
1305                         if (F_IS_HLINKED(file))
1306                                 handle_skipped_hlink(file, itemizing, code, f_out);
1307 #endif
1308                         rprintf(FERROR_XFER,
1309                                 "skipping daemon-excluded %s \"%s\"\n",
1310                                 is_dir ? "directory" : "file", fname);
1311                         if (is_dir)
1312                                 goto skipping_dir_contents;
1313                         return;
1314                 }
1315         }
1316
1317 #ifdef SUPPORT_ACLS
1318         sx.acc_acl = sx.def_acl = NULL;
1319 #endif
1320 #ifdef SUPPORT_XATTRS
1321         sx.xattr = NULL;
1322 #endif
1323         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1324           parent_is_dry_missing:
1325                 if (fuzzy_dirlist) {
1326                         flist_free(fuzzy_dirlist);
1327                         fuzzy_dirlist = NULL;
1328                 }
1329                 parent_dirname = "";
1330                 statret = -1;
1331                 stat_errno = ENOENT;
1332         } else {
1333                 const char *dn = file->dirname ? file->dirname : ".";
1334                 dry_missing_dir = NULL;
1335                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1336                         if (relative_paths && !implied_dirs
1337                          && do_stat(dn, &sx.st) < 0) {
1338                                 if (dry_run)
1339                                         goto parent_is_dry_missing;
1340                                 if (create_directory_path(fname) < 0) {
1341                                         rsyserr(FERROR_XFER, errno,
1342                                                 "recv_generator: mkdir %s failed",
1343                                                 full_fname(dn));
1344                                 }
1345                         }
1346                         if (fuzzy_dirlist) {
1347                                 flist_free(fuzzy_dirlist);
1348                                 fuzzy_dirlist = NULL;
1349                         }
1350                         if (fuzzy_basis)
1351                                 need_fuzzy_dirlist = 1;
1352 #ifdef SUPPORT_ACLS
1353                         if (!preserve_perms)
1354                                 dflt_perms = default_perms_for_dir(dn);
1355 #endif
1356                 }
1357                 parent_dirname = dn;
1358
1359                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1360                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1361                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1362                         need_fuzzy_dirlist = 0;
1363                 }
1364
1365                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1366                 stat_errno = errno;
1367         }
1368
1369         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1370                 if (is_dir) {
1371                         if (is_dir < 0)
1372                                 return;
1373                         skip_dir = file;
1374                         file->flags |= FLAG_MISSING_DIR;
1375                 }
1376 #ifdef SUPPORT_HARD_LINKS
1377                 else if (F_IS_HLINKED(file))
1378                         handle_skipped_hlink(file, itemizing, code, f_out);
1379 #endif
1380                 if (verbose > 1) {
1381                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1382                                 is_dir ? "directory" : "file", fname);
1383                 }
1384                 return;
1385         }
1386
1387         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1388          && !am_root && sx.st.st_uid == our_uid)
1389                 del_opts |= DEL_NO_UID_WRITE;
1390
1391         if (ignore_existing > 0 && statret == 0
1392          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1393                 if (verbose > 1 && is_dir >= 0)
1394                         rprintf(FINFO, "%s exists\n", fname);
1395 #ifdef SUPPORT_HARD_LINKS
1396                 if (F_IS_HLINKED(file))
1397                         handle_skipped_hlink(file, itemizing, code, f_out);
1398 #endif
1399                 goto cleanup;
1400         }
1401
1402         if (is_dir) {
1403                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1404                         goto cleanup;
1405                 if (is_dir < 0) {
1406                         /* In inc_recurse mode we want to make sure any missing
1407                          * directories get created while we're still processing
1408                          * the parent dir (which allows us to touch the parent
1409                          * dir's mtime right away).  We will handle the dir in
1410                          * full later (right before we handle its contents). */
1411                         if (statret == 0
1412                          && (S_ISDIR(sx.st.st_mode)
1413                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1414                                 goto cleanup; /* Any errors get reported later. */
1415                         if (do_mkdir(fname, file->mode & 0700) == 0)
1416                                 file->flags |= FLAG_DIR_CREATED;
1417                         goto cleanup;
1418                 }
1419                 /* The file to be received is a directory, so we need
1420                  * to prepare appropriately.  If there is already a
1421                  * file of that name and it is *not* a directory, then
1422                  * we need to delete it.  If it doesn't exist, then
1423                  * (perhaps recursively) create it. */
1424                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1425                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1426                                 goto skipping_dir_contents;
1427                         statret = -1;
1428                 }
1429                 if (dry_run && statret != 0) {
1430                         if (!dry_missing_dir)
1431                                 dry_missing_dir = file;
1432                         file->flags |= FLAG_MISSING_DIR;
1433                 }
1434                 real_ret = statret;
1435                 real_sx = sx;
1436                 if (file->flags & FLAG_DIR_CREATED)
1437                         statret = -1;
1438                 if (!preserve_perms) { /* See comment in non-dir code below. */
1439                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1440                                                dflt_perms, statret == 0);
1441                 }
1442                 if (statret != 0 && basis_dir[0] != NULL) {
1443                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1444                                               itemizing, code);
1445                         if (j == -2) {
1446                                 itemizing = 0;
1447                                 code = FNONE;
1448                                 statret = 1;
1449                         } else if (j >= 0)
1450                                 statret = 1;
1451                 }
1452                 if (itemizing && f_out != -1) {
1453                         itemize(fname, file, ndx, statret, &sx,
1454                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1455                 }
1456                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1457                         if (!relative_paths || errno != ENOENT
1458                             || create_directory_path(fname) < 0
1459                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1460                                 rsyserr(FERROR_XFER, errno,
1461                                         "recv_generator: mkdir %s failed",
1462                                         full_fname(fname));
1463                           skipping_dir_contents:
1464                                 rprintf(FERROR,
1465                                     "*** Skipping any contents from this failed directory ***\n");
1466                                 skip_dir = file;
1467                                 file->flags |= FLAG_MISSING_DIR;
1468                                 goto cleanup;
1469                         }
1470                 }
1471 #ifdef SUPPORT_XATTRS
1472                 if (preserve_xattrs && statret == 1)
1473                         copy_xattrs(fnamecmpbuf, fname);
1474 #endif
1475                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1476                     && verbose && code != FNONE && f_out != -1)
1477                         rprintf(code, "%s/\n", fname);
1478
1479                 /* We need to ensure that the dirs in the transfer have writable
1480                  * permissions during the time we are putting files within them.
1481                  * This is then fixed after the transfer is done. */
1482 #ifdef HAVE_CHMOD
1483                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1484                         mode_t mode = file->mode | S_IWUSR;
1485                         if (do_chmod(fname, mode) < 0) {
1486                                 rsyserr(FERROR_XFER, errno,
1487                                         "failed to modify permissions on %s",
1488                                         full_fname(fname));
1489                         }
1490                         need_retouch_dir_perms = 1;
1491                 }
1492 #endif
1493
1494                 if (real_ret != 0 && one_file_system)
1495                         real_sx.st.st_dev = filesystem_dev;
1496                 if (inc_recurse) {
1497                         if (one_file_system) {
1498                                 uint32 *devp = F_DIR_DEV_P(file);
1499                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1500                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1501                         }
1502                 }
1503                 else if (delete_during && f_out != -1 && !phase
1504                     && !(file->flags & FLAG_MISSING_DIR)) {
1505                         if (file->flags & FLAG_CONTENT_DIR)
1506                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1507                         else
1508                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1509                 }
1510                 goto cleanup;
1511         }
1512
1513         /* If we're not preserving permissions, change the file-list's
1514          * mode based on the local permissions and some heuristics. */
1515         if (!preserve_perms) {
1516                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1517                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1518                                        exists);
1519         }
1520
1521 #ifdef SUPPORT_HARD_LINKS
1522         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1523          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1524                 goto cleanup;
1525 #endif
1526
1527         if (preserve_links && S_ISLNK(file->mode)) {
1528 #ifdef SUPPORT_LINKS
1529                 const char *sl = F_SYMLINK(file);
1530                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1531                         if (verbose) {
1532                                 if (solo_file)
1533                                         fname = f_name(file, NULL);
1534                                 rprintf(FINFO,
1535                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1536                                         full_fname(fname), sl);
1537                         }
1538                         return;
1539                 }
1540                 if (statret == 0) {
1541                         char lnk[MAXPATHLEN];
1542                         int len;
1543
1544                         if (!S_ISLNK(sx.st.st_mode))
1545                                 statret = -1;
1546                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1547                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1548                                 /* The link is pointing to the right place. */
1549                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1550                                 if (itemizing)
1551                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1552 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1553                                 if (preserve_hard_links && F_IS_HLINKED(file))
1554                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1555 #endif
1556                                 if (remove_source_files == 1)
1557                                         goto return_with_success;
1558                                 goto cleanup;
1559                         }
1560                         /* Not the right symlink (or not a symlink), so
1561                          * delete it. */
1562                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1563                                 goto cleanup;
1564                 } else if (basis_dir[0] != NULL) {
1565                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1566                                               itemizing, code);
1567                         if (j == -2) {
1568 #ifndef CAN_HARDLINK_SYMLINK
1569                                 if (link_dest) {
1570                                         /* Resort to --copy-dest behavior. */
1571                                 } else
1572 #endif
1573                                 if (!copy_dest)
1574                                         goto cleanup;
1575                                 itemizing = 0;
1576                                 code = FNONE;
1577                         } else if (j >= 0)
1578                                 statret = 1;
1579                 }
1580 #ifdef SUPPORT_HARD_LINKS
1581                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1582                         cur_flist->in_progress++;
1583                         goto cleanup;
1584                 }
1585 #endif
1586                 if (do_symlink(sl, fname) != 0) {
1587                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1588                                 full_fname(fname), sl);
1589                 } else {
1590                         set_file_attrs(fname, file, NULL, NULL, 0);
1591                         if (itemizing) {
1592                                 itemize(fname, file, ndx, statret, &sx,
1593                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1594                         }
1595                         if (code != FNONE && verbose)
1596                                 rprintf(code, "%s -> %s\n", fname, sl);
1597 #ifdef SUPPORT_HARD_LINKS
1598                         if (preserve_hard_links && F_IS_HLINKED(file))
1599                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1600 #endif
1601                         /* This does not check remove_source_files == 1
1602                          * because this is one of the items that the old
1603                          * --remove-sent-files option would remove. */
1604                         if (remove_source_files)
1605                                 goto return_with_success;
1606                 }
1607 #endif
1608                 goto cleanup;
1609         }
1610
1611         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1612          || (preserve_specials && IS_SPECIAL(file->mode))) {
1613                 uint32 *devp = F_RDEV_P(file);
1614                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1615                 if (statret == 0) {
1616                         int del_for_flag;
1617                         if (IS_DEVICE(file->mode)) {
1618                                 if (!IS_DEVICE(sx.st.st_mode))
1619                                         statret = -1;
1620                                 del_for_flag = DEL_FOR_DEVICE;
1621                         } else {
1622                                 if (!IS_SPECIAL(sx.st.st_mode))
1623                                         statret = -1;
1624                                 del_for_flag = DEL_FOR_SPECIAL;
1625                         }
1626                         if (statret == 0
1627                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1628                          && sx.st.st_rdev == rdev) {
1629                                 /* The device or special file is identical. */
1630                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1631                                 if (itemizing)
1632                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1633 #ifdef SUPPORT_HARD_LINKS
1634                                 if (preserve_hard_links && F_IS_HLINKED(file))
1635                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1636 #endif
1637                                 if (remove_source_files == 1)
1638                                         goto return_with_success;
1639                                 goto cleanup;
1640                         }
1641                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1642                                 goto cleanup;
1643                 } else if (basis_dir[0] != NULL) {
1644                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1645                                               itemizing, code);
1646                         if (j == -2) {
1647 #ifndef CAN_HARDLINK_SPECIAL
1648                                 if (link_dest) {
1649                                         /* Resort to --copy-dest behavior. */
1650                                 } else
1651 #endif
1652                                 if (!copy_dest)
1653                                         goto cleanup;
1654                                 itemizing = 0;
1655                                 code = FNONE;
1656                         } else if (j >= 0)
1657                                 statret = 1;
1658                 }
1659 #ifdef SUPPORT_HARD_LINKS
1660                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1661                         cur_flist->in_progress++;
1662                         goto cleanup;
1663                 }
1664 #endif
1665                 if (verbose > 2) {
1666                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1667                                 fname, (int)file->mode,
1668                                 (long)major(rdev), (long)minor(rdev));
1669                 }
1670                 if (do_mknod(fname, file->mode, rdev) < 0) {
1671                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1672                                 full_fname(fname));
1673                 } else {
1674                         set_file_attrs(fname, file, NULL, NULL, 0);
1675                         if (itemizing) {
1676                                 itemize(fname, file, ndx, statret, &sx,
1677                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1678                         }
1679                         if (code != FNONE && verbose)
1680                                 rprintf(code, "%s\n", fname);
1681 #ifdef SUPPORT_HARD_LINKS
1682                         if (preserve_hard_links && F_IS_HLINKED(file))
1683                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1684 #endif
1685                         if (remove_source_files == 1)
1686                                 goto return_with_success;
1687                 }
1688                 goto cleanup;
1689         }
1690
1691         if (!S_ISREG(file->mode)) {
1692                 if (solo_file)
1693                         fname = f_name(file, NULL);
1694                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1695                 goto cleanup;
1696         }
1697
1698         if (max_size > 0 && F_LENGTH(file) > max_size) {
1699                 if (verbose > 1) {
1700                         if (solo_file)
1701                                 fname = f_name(file, NULL);
1702                         rprintf(FINFO, "%s is over max-size\n", fname);
1703                 }
1704                 goto cleanup;
1705         }
1706         if (min_size > 0 && F_LENGTH(file) < min_size) {
1707                 if (verbose > 1) {
1708                         if (solo_file)
1709                                 fname = f_name(file, NULL);
1710                         rprintf(FINFO, "%s is under min-size\n", fname);
1711                 }
1712                 goto cleanup;
1713         }
1714
1715         if (update_only > 0 && statret == 0
1716             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1717                 if (verbose > 1)
1718                         rprintf(FINFO, "%s is newer\n", fname);
1719 #ifdef SUPPORT_HARD_LINKS
1720                 if (F_IS_HLINKED(file))
1721                         handle_skipped_hlink(file, itemizing, code, f_out);
1722 #endif
1723                 goto cleanup;
1724         }
1725
1726         fnamecmp = fname;
1727         fnamecmp_type = FNAMECMP_FNAME;
1728
1729         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1730                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1731                         goto cleanup;
1732                 statret = -1;
1733                 stat_errno = ENOENT;
1734         }
1735
1736         if (statret != 0 && basis_dir[0] != NULL) {
1737                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1738                                       itemizing, code);
1739                 if (j == -2) {
1740                         if (remove_source_files == 1)
1741                                 goto return_with_success;
1742                         goto cleanup;
1743                 }
1744                 if (j >= 0) {
1745                         fnamecmp = fnamecmpbuf;
1746                         fnamecmp_type = j;
1747                         statret = 0;
1748                 }
1749         }
1750
1751         real_ret = statret;
1752         real_sx = sx;
1753
1754         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1755             && link_stat(partialptr, &partial_st, 0) == 0
1756             && S_ISREG(partial_st.st_mode)) {
1757                 if (statret != 0)
1758                         goto prepare_to_open;
1759         } else
1760                 partialptr = NULL;
1761
1762         if (statret != 0 && fuzzy_dirlist) {
1763                 int j = find_fuzzy(file, fuzzy_dirlist);
1764                 if (j >= 0) {
1765                         fuzzy_file = fuzzy_dirlist->files[j];
1766                         f_name(fuzzy_file, fnamecmpbuf);
1767                         if (verbose > 2) {
1768                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1769                                         fname, fnamecmpbuf);
1770                         }
1771                         sx.st.st_size = F_LENGTH(fuzzy_file);
1772                         statret = 0;
1773                         fnamecmp = fnamecmpbuf;
1774                         fnamecmp_type = FNAMECMP_FUZZY;
1775                 }
1776         }
1777
1778         if (statret != 0) {
1779 #ifdef SUPPORT_HARD_LINKS
1780                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1781                         cur_flist->in_progress++;
1782                         goto cleanup;
1783                 }
1784 #endif
1785                 if (stat_errno == ENOENT)
1786                         goto notify_others;
1787                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1788                         full_fname(fname));
1789                 goto cleanup;
1790         }
1791
1792         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1793                 ;
1794         else if (fnamecmp_type == FNAMECMP_FUZZY)
1795                 ;
1796         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1797                 if (partialptr) {
1798                         do_unlink(partialptr);
1799                         handle_partial_dir(partialptr, PDIR_DELETE);
1800                 }
1801                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1802                 if (itemizing)
1803                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1804 #ifdef SUPPORT_HARD_LINKS
1805                 if (preserve_hard_links && F_IS_HLINKED(file))
1806                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1807 #endif
1808                 if (remove_source_files != 1)
1809                         goto cleanup;
1810           return_with_success:
1811                 if (!dry_run)
1812                         send_msg_int(MSG_SUCCESS, ndx);
1813                 goto cleanup;
1814         }
1815
1816         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1817 #ifdef SUPPORT_HARD_LINKS
1818                 if (F_IS_HLINKED(file))
1819                         handle_skipped_hlink(file, itemizing, code, f_out);
1820 #endif
1821                 goto cleanup;
1822         }
1823
1824   prepare_to_open:
1825         if (partialptr) {
1826                 sx.st = partial_st;
1827                 fnamecmp = partialptr;
1828                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1829                 statret = 0;
1830         }
1831
1832         if (!do_xfers)
1833                 goto notify_others;
1834
1835         if (read_batch || whole_file) {
1836                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1837                         if (!(backupptr = get_backup_name(fname)))
1838                                 goto cleanup;
1839                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1840                                 goto pretend_missing;
1841                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1842                                 unmake_file(back_file);
1843                                 back_file = NULL;
1844                                 goto cleanup;
1845                         }
1846                 }
1847                 goto notify_others;
1848         }
1849
1850         if (fuzzy_dirlist) {
1851                 int j = flist_find(fuzzy_dirlist, file);
1852                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1853                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1854         }
1855
1856         /* open the file */
1857         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1858                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1859                         full_fname(fnamecmp));
1860           pretend_missing:
1861                 /* pretend the file didn't exist */
1862 #ifdef SUPPORT_HARD_LINKS
1863                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1864                         cur_flist->in_progress++;
1865                         goto cleanup;
1866                 }
1867 #endif
1868                 statret = real_ret = -1;
1869                 goto notify_others;
1870         }
1871
1872         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1873                 if (!(backupptr = get_backup_name(fname))) {
1874                         close(fd);
1875                         goto cleanup;
1876                 }
1877                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1878                         close(fd);
1879                         goto pretend_missing;
1880                 }
1881                 if (robust_unlink(backupptr) && errno != ENOENT) {
1882                         rsyserr(FERROR_XFER, errno, "unlink %s",
1883                                 full_fname(backupptr));
1884                         unmake_file(back_file);
1885                         back_file = NULL;
1886                         close(fd);
1887                         goto cleanup;
1888                 }
1889                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1890                         int save_errno = errno ? errno : EINVAL; /* 0 paranoia */
1891                         if (errno == ENOENT && make_bak_dir(backupptr) == 0) {
1892                                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)
1893                                         save_errno = errno ? errno : save_errno;
1894                                 else
1895                                         save_errno = 0;
1896                         }
1897                         if (save_errno) {
1898                                 rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(backupptr));
1899                                 unmake_file(back_file);
1900                                 back_file = NULL;
1901                                 close(fd);
1902                                 goto cleanup;
1903                         }
1904                 }
1905                 fnamecmp_type = FNAMECMP_BACKUP;
1906         }
1907
1908         if (verbose > 3) {
1909                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1910                         fnamecmp, (double)sx.st.st_size);
1911         }
1912
1913         if (verbose > 2)
1914                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1915
1916   notify_others:
1917         if (remove_source_files && !delay_updates && !phase && !dry_run)
1918                 increment_active_files(ndx, itemizing, code);
1919         if (inc_recurse && !dry_run)
1920                 cur_flist->in_progress++;
1921 #ifdef SUPPORT_HARD_LINKS
1922         if (preserve_hard_links && F_IS_HLINKED(file))
1923                 file->flags |= FLAG_FILE_SENT;
1924 #endif
1925         write_ndx(f_out, ndx);
1926         if (itemizing) {
1927                 int iflags = ITEM_TRANSFER;
1928                 if (always_checksum > 0)
1929                         iflags |= ITEM_REPORT_CHANGE;
1930                 if (fnamecmp_type != FNAMECMP_FNAME)
1931                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1932                 if (fnamecmp_type == FNAMECMP_FUZZY)
1933                         iflags |= ITEM_XNAME_FOLLOWS;
1934                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1935                         fuzzy_file ? fuzzy_file->basename : NULL);
1936 #ifdef SUPPORT_ACLS
1937                 if (preserve_acls)
1938                         free_acl(&real_sx);
1939 #endif
1940 #ifdef SUPPORT_XATTRS
1941                 if (preserve_xattrs)
1942                         free_xattr(&real_sx);
1943 #endif
1944         }
1945
1946         if (!do_xfers) {
1947 #ifdef SUPPORT_HARD_LINKS
1948                 if (preserve_hard_links && F_IS_HLINKED(file))
1949                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1950 #endif
1951                 goto cleanup;
1952         }
1953         if (read_batch)
1954                 goto cleanup;
1955
1956         if (statret != 0 || whole_file)
1957                 write_sum_head(f_out, NULL);
1958         else if (sx.st.st_size <= 0) {
1959                 write_sum_head(f_out, NULL);
1960                 close(fd);
1961         } else {
1962                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1963                         rprintf(FWARNING,
1964                             "WARNING: file is too large for checksum sending: %s\n",
1965                             fnamecmp);
1966                         write_sum_head(f_out, NULL);
1967                 }
1968                 close(fd);
1969         }
1970
1971   cleanup:
1972         if (back_file) {
1973                 int save_preserve_xattrs = preserve_xattrs;
1974                 if (f_copy >= 0)
1975                         close(f_copy);
1976 #ifdef SUPPORT_XATTRS
1977                 if (preserve_xattrs) {
1978                         copy_xattrs(fname, backupptr);
1979                         preserve_xattrs = 0;
1980                 }
1981 #endif
1982                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1983                 preserve_xattrs = save_preserve_xattrs;
1984                 if (verbose > 1) {
1985                         rprintf(FINFO, "backed up %s to %s\n",
1986                                 fname, backupptr);
1987                 }
1988                 unmake_file(back_file);
1989         }
1990
1991 #ifdef SUPPORT_ACLS
1992         if (preserve_acls)
1993                 free_acl(&sx);
1994 #endif
1995 #ifdef SUPPORT_XATTRS
1996         if (preserve_xattrs)
1997                 free_xattr(&sx);
1998 #endif
1999         return;
2000 }
2001
2002 #ifdef SUPPORT_HARD_LINKS
2003 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2004                                  enum logcode code, int f_out)
2005 {
2006         char fbuf[MAXPATHLEN];
2007         int new_last_ndx;
2008         struct file_list *save_flist = cur_flist;
2009
2010         /* If we skip the last item in a chain of links and there was a
2011          * prior non-skipped hard-link waiting to finish, finish it now. */
2012         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2013                 return;
2014
2015         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2016         cur_flist->in_progress--; /* undo prior increment */
2017         f_name(file, fbuf);
2018         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2019
2020         cur_flist = save_flist;
2021 }
2022 #endif
2023
2024 static void touch_up_dirs(struct file_list *flist, int ndx)
2025 {
2026         static int counter = 0;
2027         struct file_struct *file;
2028         char *fname;
2029         int i, start, end;
2030
2031         if (ndx < 0) {
2032                 start = 0;
2033                 end = flist->used - 1;
2034         } else
2035                 start = end = ndx;
2036
2037         /* Fix any directory permissions that were modified during the
2038          * transfer and/or re-set any tweaked modified-time values. */
2039         for (i = start; i <= end; i++, counter++) {
2040                 file = flist->files[i];
2041                 if (!S_ISDIR(file->mode)
2042                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2043                         continue;
2044                 if (verbose > 3) {
2045                         fname = f_name(file, NULL);
2046                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2047                                 NS(fname), i);
2048                 }
2049                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2050                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
2051                         continue;
2052                 fname = f_name(file, NULL);
2053                 if (!(file->mode & S_IWUSR))
2054                         do_chmod(fname, file->mode);
2055                 if (need_retouch_dir_times) {
2056                         STRUCT_STAT st;
2057                         if (link_stat(fname, &st, 0) == 0
2058                          && cmp_time(st.st_mtime, file->modtime) != 0)
2059                                 set_modtime(fname, file->modtime, file->mode);
2060                 }
2061                 if (counter >= loopchk_limit) {
2062                         if (allowed_lull)
2063                                 maybe_send_keepalive();
2064                         else
2065                                 maybe_flush_socket(0);
2066                         counter = 0;
2067                 }
2068         }
2069 }
2070
2071 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2072 {
2073         struct file_struct *file;
2074         struct file_list *flist;
2075         char fbuf[MAXPATHLEN];
2076         int ndx;
2077
2078         while (1) {
2079 #ifdef SUPPORT_HARD_LINKS
2080                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2081                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2082                         file = flist->files[ndx - flist->ndx_start];
2083                         assert(file->flags & FLAG_HLINKED);
2084                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2085                         flist->in_progress--;
2086                         continue;
2087                 }
2088 #endif
2089
2090                 if (check_redo && (ndx = get_redo_num()) != -1) {
2091                         csum_length = SUM_LENGTH;
2092                         max_size = -max_size;
2093                         min_size = -min_size;
2094                         ignore_existing = -ignore_existing;
2095                         ignore_non_existing = -ignore_non_existing;
2096                         update_only = -update_only;
2097                         always_checksum = -always_checksum;
2098                         size_only = -size_only;
2099                         append_mode = -append_mode;
2100                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2101                         ignore_times++;
2102
2103                         flist = cur_flist;
2104                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2105
2106                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2107                         if (solo_file)
2108                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2109                         else
2110                                 f_name(file, fbuf);
2111                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2112                         cur_flist->to_redo--;
2113
2114                         cur_flist = flist;
2115
2116                         csum_length = SHORT_SUM_LENGTH;
2117                         max_size = -max_size;
2118                         min_size = -min_size;
2119                         ignore_existing = -ignore_existing;
2120                         ignore_non_existing = -ignore_non_existing;
2121                         update_only = -update_only;
2122                         always_checksum = -always_checksum;
2123                         size_only = -size_only;
2124                         append_mode = -append_mode;
2125                         make_backups = -make_backups;
2126                         ignore_times--;
2127                         continue;
2128                 }
2129
2130                 if (cur_flist == first_flist)
2131                         break;
2132
2133                 /* We only get here if inc_recurse is enabled. */
2134                 if (first_flist->in_progress || first_flist->to_redo)
2135                         break;
2136
2137                 if (!read_batch) {
2138                         write_ndx(sock_f_out, NDX_DONE);
2139                         maybe_flush_socket(1);
2140                 }
2141
2142                 if (delete_during == 2 || !dir_tweaking) {
2143                         /* Skip directory touch-up. */
2144                 } else if (first_flist->parent_ndx >= 0)
2145                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2146
2147                 flist_free(first_flist); /* updates first_flist */
2148         }
2149 }
2150
2151 void generate_files(int f_out, const char *local_name)
2152 {
2153         int i, ndx, next_loopchk = 0;
2154         char fbuf[MAXPATHLEN];
2155         int itemizing;
2156         enum logcode code;
2157         int save_do_progress = do_progress;
2158
2159         if (protocol_version >= 29) {
2160                 itemizing = 1;
2161                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2162                 code = logfile_format_has_i ? FNONE : FLOG;
2163         } else if (am_daemon) {
2164                 itemizing = logfile_format_has_i && do_xfers;
2165                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2166                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2167         } else if (!am_server) {
2168                 itemizing = stdout_format_has_i;
2169                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2170                 code = itemizing ? FNONE : FINFO;
2171         } else {
2172                 itemizing = 0;
2173                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2174                 code = FINFO;
2175         }
2176         solo_file = local_name;
2177         dir_tweaking = !(list_only || solo_file || dry_run);
2178         need_retouch_dir_times = preserve_times > 1;
2179         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2180         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2181             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2182         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2183
2184         if (verbose > 2)
2185                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2186
2187         if (delete_before && !solo_file && cur_flist->used > 0)
2188                 do_delete_pass();
2189         if (delete_during == 2) {
2190                 deldelay_size = BIGPATHBUFLEN * 4;
2191                 deldelay_buf = new_array(char, deldelay_size);
2192                 if (!deldelay_buf)
2193                         out_of_memory("delete-delay");
2194         }
2195         do_progress = 0;
2196
2197         if (append_mode > 0 || whole_file < 0)
2198                 whole_file = 0;
2199         if (verbose >= 2) {
2200                 rprintf(FINFO, "delta-transmission %s\n",
2201                         whole_file
2202                         ? "disabled for local transfer or --whole-file"
2203                         : "enabled");
2204         }
2205
2206         /* Since we often fill up the outgoing socket and then just sit around
2207          * waiting for the other 2 processes to do their thing, we don't want
2208          * to exit on a timeout.  If the data stops flowing, the receiver will
2209          * notice that and let us know via the redo pipe (or its closing). */
2210         ignore_timeout = 1;
2211
2212         dflt_perms = (ACCESSPERMS & ~orig_umask);
2213
2214         do {
2215 #ifdef SUPPORT_HARD_LINKS
2216                 if (preserve_hard_links && inc_recurse) {
2217                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2218                                 wait_for_receiver();
2219                 }
2220 #endif
2221
2222                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2223                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2224                         if (solo_file)
2225                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2226                         else
2227                                 f_name(fp, fbuf);
2228                         ndx = cur_flist->ndx_start - 1;
2229                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2230                         if (delete_during && dry_run < 2 && !list_only
2231                          && !(fp->flags & FLAG_MISSING_DIR)) {
2232                                 if (fp->flags & FLAG_CONTENT_DIR) {
2233                                         dev_t dirdev;
2234                                         if (one_file_system) {
2235                                                 uint32 *devp = F_DIR_DEV_P(fp);
2236                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2237                                         } else
2238                                                 dirdev = MAKEDEV(0, 0);
2239                                         delete_in_dir(fbuf, fp, &dirdev);
2240                                 } else
2241                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2242                         }
2243                 }
2244                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2245                         struct file_struct *file = cur_flist->sorted[i];
2246
2247                         if (!F_IS_ACTIVE(file))
2248                                 continue;
2249
2250                         if (unsort_ndx)
2251                                 ndx = F_NDX(file);
2252                         else
2253                                 ndx = i + cur_flist->ndx_start;
2254
2255                         if (solo_file)
2256                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2257                         else
2258                                 f_name(file, fbuf);
2259                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2260
2261                         check_for_finished_files(itemizing, code, 0);
2262
2263                         if (i + cur_flist->ndx_start >= next_loopchk) {
2264                                 if (allowed_lull)
2265                                         maybe_send_keepalive();
2266                                 else
2267                                         maybe_flush_socket(0);
2268                                 next_loopchk += loopchk_limit;
2269                         }
2270                 }
2271
2272                 if (!inc_recurse) {
2273                         write_ndx(f_out, NDX_DONE);
2274                         break;
2275                 }
2276
2277                 while (1) {
2278                         check_for_finished_files(itemizing, code, 1);
2279                         if (cur_flist->next || flist_eof)
2280                                 break;
2281                         wait_for_receiver();
2282                 }
2283         } while ((cur_flist = cur_flist->next) != NULL);
2284
2285         if (delete_during)
2286                 delete_in_dir(NULL, NULL, &dev_zero);
2287         phase++;
2288         if (verbose > 2)
2289                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2290
2291         while (1) {
2292                 check_for_finished_files(itemizing, code, 1);
2293                 if (msgdone_cnt)
2294                         break;
2295                 wait_for_receiver();
2296         }
2297
2298         phase++;
2299         if (verbose > 2)
2300                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2301
2302         write_ndx(f_out, NDX_DONE);
2303         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2304         if (protocol_version >= 29 && !delay_updates)
2305                 write_ndx(f_out, NDX_DONE);
2306
2307         /* Read MSG_DONE for the redo phase (and any prior messages). */
2308         while (1) {
2309                 check_for_finished_files(itemizing, code, 0);
2310                 if (msgdone_cnt > 1)
2311                         break;
2312                 wait_for_receiver();
2313         }
2314
2315         if (protocol_version >= 29) {
2316                 phase++;
2317                 if (verbose > 2)
2318                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2319                 if (delay_updates)
2320                         write_ndx(f_out, NDX_DONE);
2321                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2322                 while (msgdone_cnt == 2)
2323                         wait_for_receiver();
2324         }
2325
2326         do_progress = save_do_progress;
2327         if (delete_during == 2)
2328                 do_delayed_deletions(fbuf);
2329         if (delete_after && !solo_file && file_total > 0)
2330                 do_delete_pass();
2331
2332         if ((need_retouch_dir_perms || need_retouch_dir_times)
2333          && dir_tweaking && (!inc_recurse || delete_during == 2))
2334                 touch_up_dirs(dir_flist, -1);
2335
2336         if (max_delete >= 0 && deletion_count > max_delete) {
2337                 rprintf(FWARNING,
2338                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2339                         deletion_count - max_delete);
2340                 io_error |= IOERR_DEL_LIMIT;
2341         }
2342
2343         if (verbose > 2)
2344                 rprintf(FINFO, "generate_files finished\n");
2345 }