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