More archaic-checksum improvements. This makes the len vars clearer
[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) 2003-2015 Wayne Davison
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 3 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License along
20  * with this program; if not, visit the http://fsf.org website.
21  */
22
23 #include "rsync.h"
24 #include "inums.h"
25 #include "ifuncs.h"
26
27 extern int dry_run;
28 extern int do_xfers;
29 extern int stdout_format_has_i;
30 extern int logfile_format_has_i;
31 extern int am_root;
32 extern int am_server;
33 extern int am_daemon;
34 extern int inc_recurse;
35 extern int relative_paths;
36 extern int implied_dirs;
37 extern int keep_dirlinks;
38 extern int preserve_acls;
39 extern int preserve_xattrs;
40 extern int preserve_links;
41 extern int preserve_devices;
42 extern int preserve_specials;
43 extern int preserve_hard_links;
44 extern int preserve_executability;
45 extern int preserve_perms;
46 extern int preserve_times;
47 extern int delete_mode;
48 extern int delete_before;
49 extern int delete_during;
50 extern int delete_after;
51 extern int missing_args;
52 extern int msgdone_cnt;
53 extern int ignore_errors;
54 extern int remove_source_files;
55 extern int delay_updates;
56 extern int update_only;
57 extern int human_readable;
58 extern int ignore_existing;
59 extern int ignore_non_existing;
60 extern int want_xattr_optim;
61 extern int inplace;
62 extern int append_mode;
63 extern int make_backups;
64 extern int csum_length;
65 extern int ignore_times;
66 extern int size_only;
67 extern OFF_T max_size;
68 extern OFF_T min_size;
69 extern int io_error;
70 extern int flist_eof;
71 extern int allowed_lull;
72 extern int sock_f_out;
73 extern int protocol_version;
74 extern int file_total;
75 extern int fuzzy_basis;
76 extern int always_checksum;
77 extern int flist_csum_len;
78 extern char *partial_dir;
79 extern int compare_dest;
80 extern int copy_dest;
81 extern int link_dest;
82 extern int whole_file;
83 extern int list_only;
84 extern int read_batch;
85 extern int write_batch;
86 extern int safe_symlinks;
87 extern long block_size; /* "long" because popt can't set an int32. */
88 extern int unsort_ndx;
89 extern int max_delete;
90 extern int force_delete;
91 extern int one_file_system;
92 extern int skipped_deletes;
93 extern dev_t filesystem_dev;
94 extern mode_t orig_umask;
95 extern uid_t our_uid;
96 extern char *tmpdir;
97 extern char *basis_dir[MAX_BASIS_DIRS+1];
98 extern struct file_list *cur_flist, *first_flist, *dir_flist;
99 extern filter_rule_list filter_list, daemon_filter_list;
100
101 int maybe_ATTRS_REPORT = 0;
102
103 static dev_t dev_zero;
104 static int deldelay_size = 0, deldelay_cnt = 0;
105 static char *deldelay_buf = NULL;
106 static int deldelay_fd = -1;
107 static int loopchk_limit;
108 static int dir_tweaking;
109 static int symlink_timeset_failed_flags;
110 static int need_retouch_dir_times;
111 static int need_retouch_dir_perms;
112 static const char *solo_file = NULL;
113
114 enum nonregtype {
115     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
116 };
117
118 /* Forward declarations. */
119 #ifdef SUPPORT_HARD_LINKS
120 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
121                                  enum logcode code, int f_out);
122 #endif
123
124 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
125 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
126
127 static int start_delete_delay_temp(void)
128 {
129         char fnametmp[MAXPATHLEN];
130         int save_dry_run = dry_run;
131
132         dry_run = 0;
133         if (!get_tmpname(fnametmp, "deldelay", False)
134          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
135                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
136                         inc_recurse ? "" : " -- switching to --delete-after");
137                 delete_during = 0;
138                 delete_after = !inc_recurse;
139                 dry_run = save_dry_run;
140                 return 0;
141         }
142         unlink(fnametmp);
143         dry_run = save_dry_run;
144         return 1;
145 }
146
147 static int flush_delete_delay(void)
148 {
149         if (deldelay_fd < 0 && !start_delete_delay_temp())
150                 return 0;
151         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
152                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
153                 delete_during = 0;
154                 delete_after = !inc_recurse;
155                 close(deldelay_fd);
156                 return 0;
157         }
158         deldelay_cnt = 0;
159         return 1;
160 }
161
162 static int remember_delete(struct file_struct *file, const char *fname, int flags)
163 {
164         int len;
165
166         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
167                 return 0;
168
169         if (flags & DEL_NO_UID_WRITE)
170                 deldelay_buf[deldelay_cnt++] = '!';
171
172         while (1) {
173                 len = snprintf(deldelay_buf + deldelay_cnt,
174                                deldelay_size - deldelay_cnt,
175                                "%x %s%c",
176                                (int)file->mode, fname, '\0');
177                 if ((deldelay_cnt += len) <= deldelay_size)
178                         break;
179                 deldelay_cnt -= len;
180                 if (!flush_delete_delay())
181                         return 0;
182         }
183
184         return 1;
185 }
186
187 static int read_delay_line(char *buf, int *flags_p)
188 {
189         static int read_pos = 0;
190         int j, len, mode;
191         char *bp, *past_space;
192
193         while (1) {
194                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
195                 if (j < deldelay_cnt)
196                         break;
197                 if (deldelay_fd < 0) {
198                         if (j > read_pos)
199                                 goto invalid_data;
200                         return -1;
201                 }
202                 deldelay_cnt -= read_pos;
203                 if (deldelay_cnt == deldelay_size)
204                         goto invalid_data;
205                 if (deldelay_cnt && read_pos) {
206                         memmove(deldelay_buf, deldelay_buf + read_pos,
207                                 deldelay_cnt);
208                 }
209                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
210                            deldelay_size - deldelay_cnt);
211                 if (len == 0) {
212                         if (deldelay_cnt) {
213                                 rprintf(FERROR,
214                                     "ERROR: unexpected EOF in delete-delay file.\n");
215                         }
216                         return -1;
217                 }
218                 if (len < 0) {
219                         rsyserr(FERROR, errno,
220                                 "reading delete-delay file");
221                         return -1;
222                 }
223                 deldelay_cnt += len;
224                 read_pos = 0;
225         }
226
227         bp = deldelay_buf + read_pos;
228         if (*bp == '!') {
229                 bp++;
230                 *flags_p = DEL_NO_UID_WRITE;
231         } else
232                 *flags_p = 0;
233
234         if (sscanf(bp, "%x ", &mode) != 1) {
235           invalid_data:
236                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
237                 return -1;
238         }
239         past_space = strchr(bp, ' ') + 1;
240         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
241         read_pos = j + 1;
242
243         if (len > MAXPATHLEN) {
244                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
245                 return -1;
246         }
247
248         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
249          * instead of returning a pointer to our buffer. */
250         memcpy(buf, past_space, len);
251
252         return mode;
253 }
254
255 static void do_delayed_deletions(char *delbuf)
256 {
257         int mode, flags;
258
259         if (deldelay_fd >= 0) {
260                 if (deldelay_cnt && !flush_delete_delay())
261                         return;
262                 lseek(deldelay_fd, 0, 0);
263         }
264         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
265                 delete_item(delbuf, mode, flags | DEL_RECURSE);
266         if (deldelay_fd >= 0)
267                 close(deldelay_fd);
268 }
269
270 /* This function is used to implement per-directory deletion, and is used by
271  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
272  * MAXPATHLEN buffer with the name of the directory in it (the functions we
273  * call will append names onto the end, but the old dir value will be restored
274  * on exit). */
275 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
276 {
277         static int already_warned = 0;
278         struct file_list *dirlist;
279         char delbuf[MAXPATHLEN];
280         int dlen, i;
281
282         if (!fbuf) {
283                 change_local_filter_dir(NULL, 0, 0);
284                 return;
285         }
286
287         if (DEBUG_GTE(DEL, 2))
288                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
289
290         if (allowed_lull)
291                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
292
293         if (io_error & IOERR_GENERAL && !ignore_errors) {
294                 if (already_warned)
295                         return;
296                 rprintf(FINFO,
297                         "IO error encountered -- skipping file deletion\n");
298                 already_warned = 1;
299                 return;
300         }
301
302         dlen = strlen(fbuf);
303         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
304
305         if (one_file_system) {
306                 if (file->flags & FLAG_TOP_DIR)
307                         filesystem_dev = *fs_dev;
308                 else if (filesystem_dev != *fs_dev)
309                         return;
310         }
311
312         dirlist = get_dirlist(fbuf, dlen, 0);
313
314         /* If an item in dirlist is not found in flist, delete it
315          * from the filesystem. */
316         for (i = dirlist->used; i--; ) {
317                 struct file_struct *fp = dirlist->files[i];
318                 if (!F_IS_ACTIVE(fp))
319                         continue;
320                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
321                         if (INFO_GTE(MOUNT, 1))
322                                 rprintf(FINFO, "cannot delete mount point: %s\n",
323                                         f_name(fp, NULL));
324                         continue;
325                 }
326                 /* Here we want to match regardless of file type.  Replacement
327                  * of a file with one of another type is handled separately by
328                  * a delete_item call with a DEL_MAKE_ROOM flag. */
329                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
330                         int flags = DEL_RECURSE;
331                         if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
332                                 flags |= DEL_NO_UID_WRITE;
333                         f_name(fp, delbuf);
334                         if (delete_during == 2) {
335                                 if (!remember_delete(fp, delbuf, flags))
336                                         break;
337                         } else
338                                 delete_item(delbuf, fp->mode, flags);
339                 }
340         }
341
342         flist_free(dirlist);
343 }
344
345 /* This deletes any files on the receiving side that are not present on the
346  * sending side.  This is used by --delete-before and --delete-after. */
347 static void do_delete_pass(void)
348 {
349         char fbuf[MAXPATHLEN];
350         STRUCT_STAT st;
351         int j;
352
353         /* dry_run is incremented when the destination doesn't exist yet. */
354         if (dry_run > 1 || list_only)
355                 return;
356
357         for (j = 0; j < cur_flist->used; j++) {
358                 struct file_struct *file = cur_flist->sorted[j];
359
360                 if (!F_IS_ACTIVE(file))
361                         continue;
362
363                 f_name(file, fbuf);
364
365                 if (!(file->flags & FLAG_CONTENT_DIR)) {
366                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
367                         continue;
368                 }
369
370                 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
371                         rprintf(FINFO, "deleting in %s\n", fbuf);
372
373                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
374                  || !S_ISDIR(st.st_mode))
375                         continue;
376
377                 delete_in_dir(fbuf, file, &st.st_dev);
378         }
379         delete_in_dir(NULL, NULL, &dev_zero);
380
381         if (INFO_GTE(FLIST, 2) && !am_server)
382                 rprintf(FINFO, "                    \r");
383 }
384
385 static inline int time_diff(STRUCT_STAT *stp, struct file_struct *file)
386 {
387 #ifdef ST_MTIME_NSEC
388         return cmp_time(stp->st_mtime, stp->ST_MTIME_NSEC, file->modtime, F_MOD_NSEC(file));
389 #else
390         return cmp_time(stp->st_mtime, 0L, file->modtime, 0L);
391 #endif
392 }
393
394 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
395 {
396         if (preserve_perms)
397                 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
398
399         if (preserve_executability)
400                 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
401
402         return 0;
403 }
404
405 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
406 {
407         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
408                 return 1;
409
410         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
411                 return 1;
412
413         return 0;
414 }
415
416 #ifdef SUPPORT_ACLS
417 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
418 {
419         if (preserve_acls) {
420                 if (!ACL_READY(*sxp))
421                         get_acl(fname, sxp);
422                 if (set_acl(NULL, file, sxp, file->mode))
423                         return 1;
424         }
425
426         return 0;
427 }
428 #endif
429
430 #ifdef SUPPORT_XATTRS
431 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
432 {
433         if (preserve_xattrs) {
434                 if (!XATTR_READY(*sxp))
435                         get_xattr(fname, sxp);
436                 if (xattr_diff(file, sxp, 0))
437                         return 1;
438         }
439
440         return 0;
441 }
442 #endif
443
444 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
445 {
446         if (S_ISLNK(file->mode)) {
447 #ifdef CAN_SET_SYMLINK_TIMES
448                 if (preserve_times & PRESERVE_LINK_TIMES && time_diff(&sxp->st, file))
449                         return 0;
450 #endif
451 #ifdef CAN_CHMOD_SYMLINK
452                 if (perms_differ(file, sxp))
453                         return 0;
454 #endif
455 #ifdef CAN_CHOWN_SYMLINK
456                 if (ownership_differs(file, sxp))
457                         return 0;
458 #endif
459 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
460                 if (acls_differ(fname, file, sxp))
461                         return 0;
462 #endif
463 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
464                 if (xattrs_differ(fname, file, sxp))
465                         return 0;
466 #endif
467         } else {
468                 if (preserve_times && time_diff(&sxp->st, file))
469                         return 0;
470                 if (perms_differ(file, sxp))
471                         return 0;
472                 if (ownership_differs(file, sxp))
473                         return 0;
474 #ifdef SUPPORT_ACLS
475                 if (acls_differ(fname, file, sxp))
476                         return 0;
477 #endif
478 #ifdef SUPPORT_XATTRS
479                 if (xattrs_differ(fname, file, sxp))
480                         return 0;
481 #endif
482         }
483
484         return 1;
485 }
486
487 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
488              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
489              const char *xname)
490 {
491         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
492                 int keep_time = !preserve_times ? 0
493                     : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
494                     : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
495                     : 1;
496
497                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
498                         iflags |= ITEM_REPORT_SIZE;
499                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
500                         if (iflags & ITEM_LOCAL_CHANGE)
501                                 iflags |= symlink_timeset_failed_flags;
502                 } else if (keep_time
503                  ? time_diff(&sxp->st, file)
504                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
505                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
506                         iflags |= ITEM_REPORT_TIME;
507 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
508                 if (S_ISLNK(file->mode)) {
509                         ;
510                 } else
511 #endif
512                 if (preserve_perms) {
513                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
514                                 iflags |= ITEM_REPORT_PERMS;
515                 } else if (preserve_executability
516                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
517                         iflags |= ITEM_REPORT_PERMS;
518                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
519                         iflags |= ITEM_REPORT_OWNER;
520                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
521                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
522                         iflags |= ITEM_REPORT_GROUP;
523 #ifdef SUPPORT_ACLS
524                 if (preserve_acls && !S_ISLNK(file->mode)) {
525                         if (!ACL_READY(*sxp))
526                                 get_acl(fnamecmp, sxp);
527                         if (set_acl(NULL, file, sxp, file->mode))
528                                 iflags |= ITEM_REPORT_ACL;
529                 }
530 #endif
531 #ifdef SUPPORT_XATTRS
532                 if (preserve_xattrs) {
533                         if (!XATTR_READY(*sxp))
534                                 get_xattr(fnamecmp, sxp);
535                         if (xattr_diff(file, sxp, 1))
536                                 iflags |= ITEM_REPORT_XATTR;
537                 }
538 #endif
539         } else {
540 #ifdef SUPPORT_XATTRS
541                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
542                         iflags |= ITEM_REPORT_XATTR;
543 #endif
544                 iflags |= ITEM_IS_NEW;
545         }
546
547         iflags &= 0xffff;
548         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
549           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
550                 if (protocol_version >= 29) {
551                         if (ndx >= 0)
552                                 write_ndx(sock_f_out, ndx);
553                         write_shortint(sock_f_out, iflags);
554                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
555                                 write_byte(sock_f_out, fnamecmp_type);
556                         if (iflags & ITEM_XNAME_FOLLOWS)
557                                 write_vstring(sock_f_out, xname, strlen(xname));
558 #ifdef SUPPORT_XATTRS
559                         if (preserve_xattrs && do_xfers
560                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
561                                 int fd = iflags & ITEM_REPORT_XATTR
562                                       && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
563                                        ? sock_f_out : -1;
564                                 send_xattr_request(NULL, file, fd);
565                         }
566 #endif
567                 } else if (ndx >= 0) {
568                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
569                         log_item(code, file, iflags, xname);
570                 }
571         }
572 }
573
574
575 /* Perform our quick-check heuristic for determining if a file is unchanged. */
576 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
577 {
578         if (st->st_size != F_LENGTH(file))
579                 return 0;
580
581         /* if always checksum is set then we use the checksum instead
582            of the file time to determine whether to sync */
583         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
584                 char sum[MAX_DIGEST_LEN];
585                 file_checksum(fn, st, sum);
586                 return memcmp(sum, F_SUM(file), flist_csum_len) == 0;
587         }
588
589         if (size_only > 0)
590                 return 1;
591
592         if (ignore_times)
593                 return 0;
594
595         return time_diff(st, file) == 0;
596 }
597
598
599 /*
600  * set (initialize) the size entries in the per-file sum_struct
601  * calculating dynamic block and checksum sizes.
602  *
603  * This is only called from generate_and_send_sums() but is a separate
604  * function to encapsulate the logic.
605  *
606  * The block size is a rounded square root of file length.
607  *
608  * The checksum size is determined according to:
609  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
610  * provided by Donovan Baarda which gives a probability of rsync
611  * algorithm corrupting data and falling back using the whole md4
612  * checksums.
613  *
614  * This might be made one of several selectable heuristics.
615  */
616 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
617 {
618         int32 blength;
619         int s2length;
620         int64 l;
621
622         if (len < 0) {
623                 /* The file length overflowed our int64 var, so we can't process this file. */
624                 sum->count = -1; /* indicate overflow error */
625                 return;
626         }
627
628         if (block_size)
629                 blength = block_size;
630         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
631                 blength = BLOCK_SIZE;
632         else {
633                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
634                 int32 c;
635                 int cnt;
636                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
637                 if (c < 0 || c >= max_blength)
638                         blength = max_blength;
639                 else {
640                     blength = 0;
641                     do {
642                             blength |= c;
643                             if (len < (int64)blength * blength)
644                                     blength &= ~c;
645                             c >>= 1;
646                     } while (c >= 8);   /* round to multiple of 8 */
647                     blength = MAX(blength, BLOCK_SIZE);
648                 }
649         }
650
651         if (protocol_version < 27) {
652                 s2length = csum_length;
653         } else if (csum_length == SUM_LENGTH) {
654                 s2length = SUM_LENGTH;
655         } else {
656                 int32 c;
657                 int b = BLOCKSUM_BIAS;
658                 for (l = len; l >>= 1; b += 2) {}
659                 for (c = blength; (c >>= 1) && b; b--) {}
660                 /* add a bit, subtract rollsum, round up. */
661                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
662                 s2length = MAX(s2length, csum_length);
663                 s2length = MIN(s2length, SUM_LENGTH);
664         }
665
666         sum->flength    = len;
667         sum->blength    = blength;
668         sum->s2length   = s2length;
669         sum->remainder  = (int32)(len % blength);
670         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
671
672         if ((int64)sum->count != l)
673                 sum->count = -1;
674
675         if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
676                 rprintf(FINFO,
677                         "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
678                         big_num(sum->count), (long)sum->remainder, (long)sum->blength,
679                         sum->s2length, big_num(sum->flength));
680         }
681 }
682
683
684 /*
685  * Generate and send a stream of signatures/checksums that describe a buffer
686  *
687  * Generate approximately one checksum every block_len bytes.
688  */
689 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
690 {
691         int32 i;
692         struct map_struct *mapbuf;
693         struct sum_struct sum;
694         OFF_T offset = 0;
695
696         sum_sizes_sqroot(&sum, len);
697         if (sum.count < 0)
698                 return -1;
699         write_sum_head(f_out, &sum);
700
701         if (append_mode > 0 && f_copy < 0)
702                 return 0;
703
704         if (len > 0)
705                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
706         else
707                 mapbuf = NULL;
708
709         for (i = 0; i < sum.count; i++) {
710                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
711                 char *map = map_ptr(mapbuf, offset, n1);
712                 char sum2[SUM_LENGTH];
713                 uint32 sum1;
714
715                 len -= n1;
716                 offset += n1;
717
718                 if (f_copy >= 0) {
719                         full_write(f_copy, map, n1);
720                         if (append_mode > 0)
721                                 continue;
722                 }
723
724                 sum1 = get_checksum1(map, n1);
725                 get_checksum2(map, n1, sum2);
726
727                 if (DEBUG_GTE(DELTASUM, 3)) {
728                         rprintf(FINFO,
729                                 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
730                                 big_num(i), big_num(offset - n1), (long)n1,
731                                 (unsigned long)sum1);
732                 }
733                 write_int(f_out, sum1);
734                 write_buf(f_out, sum2, sum.s2length);
735         }
736
737         if (mapbuf)
738                 unmap_file(mapbuf);
739
740         return 0;
741 }
742
743
744 /* Try to find a filename in the same dir as "fname" with a similar name. */
745 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
746 {
747         int fname_len, fname_suf_len;
748         const char *fname_suf, *fname = file->basename;
749         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
750         int i, j;
751         struct file_struct *lowest_fp = NULL;
752
753         fname_len = strlen(fname);
754         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
755
756         /* Try to find an exact size+mtime match first. */
757         for (i = 0; i < fuzzy_basis; i++) {
758                 struct file_list *dirlist = dirlist_array[i];
759
760                 if (!dirlist)
761                         continue;
762
763                 for (j = 0; j < dirlist->used; j++) {
764                         struct file_struct *fp = dirlist->files[j];
765
766                         if (!F_IS_ACTIVE(fp))
767                                 continue;
768
769                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
770                                 continue;
771
772                         if (F_LENGTH(fp) == F_LENGTH(file) && cmp_time(fp->modtime, 0L, file->modtime, 0L) == 0) {
773                                 if (DEBUG_GTE(FUZZY, 2))
774                                         rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
775                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
776                                 return fp;
777                         }
778
779                 }
780         }
781
782         for (i = 0; i < fuzzy_basis; i++) {
783                 struct file_list *dirlist = dirlist_array[i];
784
785                 if (!dirlist)
786                         continue;
787
788                 for (j = 0; j < dirlist->used; j++) {
789                         struct file_struct *fp = dirlist->files[j];
790                         const char *suf, *name;
791                         int len, suf_len;
792                         uint32 dist;
793
794                         if (!F_IS_ACTIVE(fp))
795                                 continue;
796
797                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
798                                 continue;
799
800                         name = fp->basename;
801                         len = strlen(name);
802                         suf = find_filename_suffix(name, len, &suf_len);
803
804                         dist = fuzzy_distance(name, len, fname, fname_len);
805                         /* Add some extra weight to how well the suffixes match. */
806                         dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
807                         if (DEBUG_GTE(FUZZY, 2)) {
808                                 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
809                                         f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
810                         }
811                         if (dist <= lowest_dist) {
812                                 lowest_dist = dist;
813                                 lowest_fp = fp;
814                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
815                         }
816                 }
817         }
818
819         return lowest_fp;
820 }
821
822 /* Copy a file found in our --copy-dest handling. */
823 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
824 {
825         char buf[MAXPATHLEN];
826         const char *copy_to, *partialptr;
827         int save_preserve_xattrs = preserve_xattrs;
828         int ok, fd_w;
829
830         if (inplace) {
831                 /* Let copy_file open the destination in place. */
832                 fd_w = -1;
833                 copy_to = dest;
834         } else {
835                 fd_w = open_tmpfile(buf, dest, file);
836                 if (fd_w < 0)
837                         return -1;
838                 copy_to = buf;
839         }
840         cleanup_set(copy_to, NULL, NULL, -1, -1);
841         if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
842                 if (INFO_GTE(COPY, 1)) {
843                         rsyserr(FINFO, errno, "copy_file %s => %s",
844                                 full_fname(src), copy_to);
845                 }
846                 /* Try to clean up. */
847                 unlink(copy_to);
848                 cleanup_disable();
849                 return -1;
850         }
851         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
852         preserve_xattrs = 0; /* xattrs were copied with file */
853         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
854         preserve_xattrs = save_preserve_xattrs;
855         cleanup_disable();
856         return ok ? 0 : -1;
857 }
858
859 /* This is only called for regular files.  We return -2 if we've finished
860  * handling the file, -1 if no dest-linking occurred, or a non-negative
861  * value if we found an alternate basis file.  If we're called with the
862  * find_exact_for_existing flag, the destination file already exists, so
863  * we only try to find an exact alt-dest match.  In this case, the returns
864  * are only -2 & -1 (both as above). */
865 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
866                          char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
867                          int itemizing, enum logcode code)
868 {
869         STRUCT_STAT real_st = sxp->st;
870         int best_match = -1;
871         int match_level = 0;
872         int j = 0;
873
874         do {
875                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
876                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
877                         continue;
878                 switch (match_level) {
879                 case 0:
880                         best_match = j;
881                         match_level = 1;
882                         /* FALL THROUGH */
883                 case 1:
884                         if (!unchanged_file(cmpbuf, file, &sxp->st))
885                                 continue;
886                         best_match = j;
887                         match_level = 2;
888                         /* FALL THROUGH */
889                 case 2:
890                         if (!unchanged_attrs(cmpbuf, file, sxp)) {
891                                 free_stat_x(sxp);
892                                 continue;
893                         }
894                         best_match = j;
895                         match_level = 3;
896                         break;
897                 }
898                 break;
899         } while (basis_dir[++j] != NULL);
900
901         if (!match_level)
902                 goto got_nothing_for_ya;
903
904         if (j != best_match) {
905                 j = best_match;
906                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
907                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
908                         goto got_nothing_for_ya;
909         }
910
911         if (match_level == 3 && !copy_dest) {
912                 if (find_exact_for_existing) {
913                         if (link_dest && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
914                                 return -1;
915                         if (do_unlink(fname) < 0 && errno != ENOENT)
916                                 goto got_nothing_for_ya;
917                 }
918 #ifdef SUPPORT_HARD_LINKS
919                 if (link_dest) {
920                         if (!hard_link_one(file, fname, cmpbuf, 1))
921                                 goto try_a_copy;
922                         if (preserve_hard_links && F_IS_HLINKED(file))
923                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
924                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
925                                 itemize(cmpbuf, file, ndx, 1, sxp,
926                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
927                                         0, "");
928                         }
929                 } else
930 #endif
931                 {
932                         if (itemizing)
933                                 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
934                 }
935                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
936                         rprintf(FCLIENT, "%s is uptodate\n", fname);
937                 return -2;
938         }
939
940         if (find_exact_for_existing)
941                 goto got_nothing_for_ya;
942
943         if (match_level >= 2) {
944 #ifdef SUPPORT_HARD_LINKS
945           try_a_copy: /* Copy the file locally. */
946 #endif
947                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
948                         if (find_exact_for_existing) /* Can get here via hard-link failure */
949                                 goto got_nothing_for_ya;
950                         return -1;
951                 }
952                 if (itemizing)
953                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
954                 if (maybe_ATTRS_REPORT
955                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
956                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
957                         code = match_level == 3 ? FCLIENT : FINFO;
958                         rprintf(code, "%s%s\n", fname,
959                                 match_level == 3 ? " is uptodate" : "");
960                 }
961 #ifdef SUPPORT_HARD_LINKS
962                 if (preserve_hard_links && F_IS_HLINKED(file))
963                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
964 #endif
965                 return -2;
966         }
967
968         return FNAMECMP_BASIS_DIR_LOW + j;
969
970 got_nothing_for_ya:
971         sxp->st = real_st;
972         return -1;
973 }
974
975 /* This is only called for non-regular files.  We return -2 if we've finished
976  * handling the file, or -1 if no dest-linking occurred, or a non-negative
977  * value if we found an alternate basis file. */
978 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
979                          char *cmpbuf, stat_x *sxp, int itemizing,
980                          enum logcode code)
981 {
982         int best_match = -1;
983         int match_level = 0;
984         enum nonregtype type;
985         uint32 *devp;
986 #ifdef SUPPORT_LINKS
987         char lnk[MAXPATHLEN];
988         int len;
989 #endif
990         int j = 0;
991
992 #ifndef SUPPORT_LINKS
993         if (S_ISLNK(file->mode))
994                 return -1;
995 #endif
996         if (S_ISDIR(file->mode)) {
997                 type = TYPE_DIR;
998         } else if (IS_SPECIAL(file->mode))
999                 type = TYPE_SPECIAL;
1000         else if (IS_DEVICE(file->mode))
1001                 type = TYPE_DEVICE;
1002 #ifdef SUPPORT_LINKS
1003         else if (S_ISLNK(file->mode))
1004                 type = TYPE_SYMLINK;
1005 #endif
1006         else {
1007                 rprintf(FERROR,
1008                         "internal: try_dests_non() called with invalid mode (%o)\n",
1009                         (int)file->mode);
1010                 exit_cleanup(RERR_UNSUPPORTED);
1011         }
1012
1013         do {
1014                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1015                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1016                         continue;
1017                 switch (type) {
1018                 case TYPE_DIR:
1019                         if (!S_ISDIR(sxp->st.st_mode))
1020                                 continue;
1021                         break;
1022                 case TYPE_SPECIAL:
1023                         if (!IS_SPECIAL(sxp->st.st_mode))
1024                                 continue;
1025                         break;
1026                 case TYPE_DEVICE:
1027                         if (!IS_DEVICE(sxp->st.st_mode))
1028                                 continue;
1029                         break;
1030                 case TYPE_SYMLINK:
1031 #ifdef SUPPORT_LINKS
1032                         if (!S_ISLNK(sxp->st.st_mode))
1033                                 continue;
1034                         break;
1035 #else
1036                         return -1;
1037 #endif
1038                 }
1039                 if (match_level < 1) {
1040                         match_level = 1;
1041                         best_match = j;
1042                 }
1043                 switch (type) {
1044                 case TYPE_DIR:
1045                 case TYPE_SPECIAL:
1046                         break;
1047                 case TYPE_DEVICE:
1048                         devp = F_RDEV_P(file);
1049                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1050                                 continue;
1051                         break;
1052                 case TYPE_SYMLINK:
1053 #ifdef SUPPORT_LINKS
1054                         if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1055                                 continue;
1056                         lnk[len] = '\0';
1057                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1058                                 continue;
1059                         break;
1060 #else
1061                         return -1;
1062 #endif
1063                 }
1064                 if (match_level < 2) {
1065                         match_level = 2;
1066                         best_match = j;
1067                 }
1068                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1069                         match_level = 3;
1070                         best_match = j;
1071                         break;
1072                 }
1073         } while (basis_dir[++j] != NULL);
1074
1075         if (!match_level)
1076                 return -1;
1077
1078         if (j != best_match) {
1079                 j = best_match;
1080                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1081                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1082                         return -1;
1083         }
1084
1085         if (match_level == 3) {
1086 #ifdef SUPPORT_HARD_LINKS
1087                 if (link_dest
1088 #ifndef CAN_HARDLINK_SYMLINK
1089                  && !S_ISLNK(file->mode)
1090 #endif
1091 #ifndef CAN_HARDLINK_SPECIAL
1092                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1093 #endif
1094                  && !S_ISDIR(file->mode)) {
1095                         if (do_link(cmpbuf, fname) < 0) {
1096                                 rsyserr(FERROR_XFER, errno,
1097                                         "failed to hard-link %s with %s",
1098                                         cmpbuf, fname);
1099                                 return j;
1100                         }
1101                         if (preserve_hard_links && F_IS_HLINKED(file))
1102                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1103                 } else
1104 #endif
1105                         match_level = 2;
1106                 if (itemizing && stdout_format_has_i
1107                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1108                         int chg = compare_dest && type != TYPE_DIR ? 0
1109                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1110                         char *lp = match_level == 3 ? "" : NULL;
1111                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1112                 }
1113                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1114                         rprintf(FCLIENT, "%s%s is uptodate\n",
1115                                 fname, type == TYPE_DIR ? "/" : "");
1116                 }
1117                 return -2;
1118         }
1119
1120         return j;
1121 }
1122
1123 static void list_file_entry(struct file_struct *f)
1124 {
1125         char permbuf[PERMSTRING_SIZE];
1126         int64 len;
1127         int colwidth = human_readable ? 14 : 11;
1128
1129         if (!F_IS_ACTIVE(f)) {
1130                 /* this can happen if duplicate names were removed */
1131                 return;
1132         }
1133
1134         permstring(permbuf, f->mode);
1135         len = F_LENGTH(f);
1136
1137         /* TODO: indicate '+' if the entry has an ACL. */
1138
1139 #ifdef SUPPORT_LINKS
1140         if (preserve_links && S_ISLNK(f->mode)) {
1141                 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1142                         permbuf, colwidth, human_num(len),
1143                         timestring(f->modtime), f_name(f, NULL),
1144                         F_SYMLINK(f));
1145         } else
1146 #endif
1147         if (missing_args == 2 && f->mode == 0) {
1148                 rprintf(FINFO, "%-*s %s\n",
1149                         colwidth + 31, "*missing",
1150                         f_name(f, NULL));
1151         } else {
1152                 rprintf(FINFO, "%s %*s %s %s\n",
1153                         permbuf, colwidth, human_num(len),
1154                         timestring(f->modtime), f_name(f, NULL));
1155         }
1156 }
1157
1158 static int phase = 0;
1159 static int dflt_perms;
1160
1161 static int implied_dirs_are_missing;
1162 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1163 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1164 {
1165         return F_DEPTH(file) > F_DEPTH(subtree)
1166                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1167 }
1168
1169 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1170  * make sure it exists, and has the right permissions/timestamp info.  For
1171  * all other non-regular files (symlinks, etc.) we create them here.  For
1172  * regular files that have changed, we try to find a basis file and then
1173  * start sending checksums.  The ndx is the file's unique index value.
1174  *
1175  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1176  * passed to delete_item(), which can use it during a recursive delete.)
1177  *
1178  * Note that f_out is set to -1 when doing final directory-permission and
1179  * modification-time repair. */
1180 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1181                            int itemizing, enum logcode code, int f_out)
1182 {
1183         static const char *parent_dirname = "";
1184         static struct file_struct *prior_dir_file = NULL;
1185         /* Missing dir not created due to --dry-run; will still be scanned. */
1186         static struct file_struct *dry_missing_dir = NULL;
1187         /* Missing dir whose contents are skipped altogether due to
1188          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1189         static struct file_struct *skip_dir = NULL;
1190         static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1191         static int need_fuzzy_dirlist = 0;
1192         struct file_struct *fuzzy_file = NULL;
1193         int fd = -1, f_copy = -1;
1194         stat_x sx, real_sx;
1195         STRUCT_STAT partial_st;
1196         struct file_struct *back_file = NULL;
1197         int statret, real_ret, stat_errno;
1198         char *fnamecmp, *partialptr, *backupptr = NULL;
1199         char fnamecmpbuf[MAXPATHLEN];
1200         uchar fnamecmp_type;
1201         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1202         int is_dir = !S_ISDIR(file->mode) ? 0
1203                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1204                    : 1;
1205
1206         if (DEBUG_GTE(GENR, 1))
1207                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1208
1209         if (list_only) {
1210                 if (is_dir < 0
1211                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1212                         return;
1213                 list_file_entry(file);
1214                 return;
1215         }
1216
1217         if (skip_dir) {
1218                 if (is_below(file, skip_dir)) {
1219                         if (is_dir)
1220                                 file->flags |= FLAG_MISSING_DIR;
1221 #ifdef SUPPORT_HARD_LINKS
1222                         else if (F_IS_HLINKED(file))
1223                                 handle_skipped_hlink(file, itemizing, code, f_out);
1224 #endif
1225                         return;
1226                 }
1227                 skip_dir = NULL;
1228         }
1229
1230         init_stat_x(&sx);
1231         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1232                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1233                         if (is_dir < 0)
1234                                 return;
1235 #ifdef SUPPORT_HARD_LINKS
1236                         if (F_IS_HLINKED(file))
1237                                 handle_skipped_hlink(file, itemizing, code, f_out);
1238 #endif
1239                         rprintf(FERROR_XFER,
1240                                 "ERROR: daemon refused to receive %s \"%s\"\n",
1241                                 is_dir ? "directory" : "file", fname);
1242                         if (is_dir)
1243                                 goto skipping_dir_contents;
1244                         return;
1245                 }
1246         }
1247
1248         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1249                 int i;
1250           parent_is_dry_missing:
1251                 for (i = 0; i < fuzzy_basis; i++) {
1252                         if (fuzzy_dirlist[i]) {
1253                                 flist_free(fuzzy_dirlist[i]);
1254                                 fuzzy_dirlist[i] = NULL;
1255                         }
1256                 }
1257                 parent_dirname = "";
1258                 statret = -1;
1259                 stat_errno = ENOENT;
1260         } else {
1261                 const char *dn = file->dirname ? file->dirname : ".";
1262                 dry_missing_dir = NULL;
1263                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1264                         /* Each parent dir must be in the file list or the flist data is bad.
1265                          * Optimization: most of the time the parent dir will be the last dir
1266                          * this function was asked to process in the file list. */
1267                         if (!inc_recurse
1268                          && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
1269                          && (!prior_dir_file || strcmp(dn, f_name(prior_dir_file, NULL)) != 0)
1270                          && flist_find_name(cur_flist, dn, 1) < 0) {
1271                                 rprintf(FERROR,
1272                                         "ABORTING due to invalid path from sender: %s/%s\n",
1273                                         dn, file->basename);
1274                                 exit_cleanup(RERR_PROTOCOL);
1275                         }
1276                         if (relative_paths && !implied_dirs
1277                          && do_stat(dn, &sx.st) < 0) {
1278                                 if (dry_run)
1279                                         goto parent_is_dry_missing;
1280                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1281                                         rsyserr(FERROR_XFER, errno,
1282                                                 "recv_generator: mkdir %s failed",
1283                                                 full_fname(dn));
1284                                 }
1285                         }
1286                         if (fuzzy_basis) {
1287                                 int i;
1288                                 for (i = 0; i < fuzzy_basis; i++) {
1289                                         if (fuzzy_dirlist[i]) {
1290                                                 flist_free(fuzzy_dirlist[i]);
1291                                                 fuzzy_dirlist[i] = NULL;
1292                                         }
1293                                 }
1294                                 need_fuzzy_dirlist = 1;
1295                         }
1296 #ifdef SUPPORT_ACLS
1297                         if (!preserve_perms)
1298                                 dflt_perms = default_perms_for_dir(dn);
1299 #endif
1300                 }
1301                 parent_dirname = dn;
1302
1303                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1304                         int i;
1305                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1306                         for (i = 0; i < fuzzy_basis; i++) {
1307                                 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1308                                         continue;
1309                                 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1310                                 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1311                                         flist_free(fuzzy_dirlist[i]);
1312                                         fuzzy_dirlist[i] = NULL;
1313                                 }
1314                         }
1315                         need_fuzzy_dirlist = 0;
1316                 }
1317
1318                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1319                 stat_errno = errno;
1320         }
1321
1322         if (missing_args == 2 && file->mode == 0) {
1323                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1324                         return;
1325                 if (statret == 0)
1326                         delete_item(fname, sx.st.st_mode, del_opts);
1327                 return;
1328         }
1329
1330         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1331                 if (is_dir) {
1332                         if (is_dir < 0)
1333                                 return;
1334                         skip_dir = file;
1335                         file->flags |= FLAG_MISSING_DIR;
1336                 }
1337 #ifdef SUPPORT_HARD_LINKS
1338                 else if (F_IS_HLINKED(file))
1339                         handle_skipped_hlink(file, itemizing, code, f_out);
1340 #endif
1341                 if (INFO_GTE(SKIP, 1)) {
1342                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1343                                 is_dir ? "directory" : "file", fname);
1344                 }
1345                 return;
1346         }
1347
1348         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1349          && !am_root && sx.st.st_uid == our_uid)
1350                 del_opts |= DEL_NO_UID_WRITE;
1351
1352         if (ignore_existing > 0 && statret == 0
1353          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1354                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1355                         rprintf(FINFO, "%s exists\n", fname);
1356 #ifdef SUPPORT_HARD_LINKS
1357                 if (F_IS_HLINKED(file))
1358                         handle_skipped_hlink(file, itemizing, code, f_out);
1359 #endif
1360                 goto cleanup;
1361         }
1362
1363         fnamecmp = fname;
1364
1365         if (is_dir) {
1366                 mode_t added_perms;
1367                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1368                         goto cleanup;
1369                 if (am_root < 0) {
1370                         /* For --fake-super, the dir must be useable by the copying
1371                          * user, just like it would be for root. */
1372                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1373                 } else
1374                         added_perms = 0;
1375                 if (is_dir < 0) {
1376                         if (!(preserve_times & PRESERVE_DIR_TIMES))
1377                                 return;
1378                         /* In inc_recurse mode we want to make sure any missing
1379                          * directories get created while we're still processing
1380                          * the parent dir (which allows us to touch the parent
1381                          * dir's mtime right away).  We will handle the dir in
1382                          * full later (right before we handle its contents). */
1383                         if (statret == 0
1384                          && (S_ISDIR(sx.st.st_mode)
1385                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1386                                 goto cleanup; /* Any errors get reported later. */
1387                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1388                                 file->flags |= FLAG_DIR_CREATED;
1389                         goto cleanup;
1390                 }
1391                 /* The file to be received is a directory, so we need
1392                  * to prepare appropriately.  If there is already a
1393                  * file of that name and it is *not* a directory, then
1394                  * we need to delete it.  If it doesn't exist, then
1395                  * (perhaps recursively) create it. */
1396                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1397                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1398                                 goto skipping_dir_contents;
1399                         statret = -1;
1400                 }
1401                 if (dry_run && statret != 0) {
1402                         if (!dry_missing_dir)
1403                                 dry_missing_dir = file;
1404                         file->flags |= FLAG_MISSING_DIR;
1405                 }
1406                 init_stat_x(&real_sx);
1407                 real_sx.st = sx.st;
1408                 real_ret = statret;
1409                 if (file->flags & FLAG_DIR_CREATED)
1410                         statret = -1;
1411                 if (!preserve_perms) { /* See comment in non-dir code below. */
1412                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1413                                                dflt_perms, statret == 0);
1414                 }
1415                 if (statret != 0 && basis_dir[0] != NULL) {
1416                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1417                                               itemizing, code);
1418                         if (j == -2) {
1419                                 itemizing = 0;
1420                                 code = FNONE;
1421                                 statret = 1;
1422                         } else if (j >= 0) {
1423                                 statret = 1;
1424                                 fnamecmp = fnamecmpbuf;
1425                         }
1426                 }
1427                 if (itemizing && f_out != -1) {
1428                         itemize(fnamecmp, file, ndx, statret, &sx,
1429                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1430                 }
1431                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1432                         if (!relative_paths || errno != ENOENT
1433                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1434                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1435                                 rsyserr(FERROR_XFER, errno,
1436                                         "recv_generator: mkdir %s failed",
1437                                         full_fname(fname));
1438                           skipping_dir_contents:
1439                                 rprintf(FERROR,
1440                                     "*** Skipping any contents from this failed directory ***\n");
1441                                 skip_dir = file;
1442                                 file->flags |= FLAG_MISSING_DIR;
1443                                 goto cleanup;
1444                         }
1445                 }
1446
1447 #ifdef SUPPORT_XATTRS
1448                 if (preserve_xattrs && statret == 1)
1449                         copy_xattrs(fnamecmpbuf, fname);
1450 #endif
1451                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1452                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1453                         rprintf(code, "%s/\n", fname);
1454
1455                 /* We need to ensure that the dirs in the transfer have both
1456                  * readable and writable permissions during the time we are
1457                  * putting files within them.  This is then restored to the
1458                  * former permissions after the transfer is done. */
1459 #ifdef HAVE_CHMOD
1460                 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1461                         mode_t mode = file->mode | S_IRWXU;
1462                         if (do_chmod(fname, mode) < 0) {
1463                                 rsyserr(FERROR_XFER, errno,
1464                                         "failed to modify permissions on %s",
1465                                         full_fname(fname));
1466                         }
1467                         need_retouch_dir_perms = 1;
1468                 }
1469 #endif
1470
1471                 if (real_ret != 0 && one_file_system)
1472                         real_sx.st.st_dev = filesystem_dev;
1473                 if (inc_recurse) {
1474                         if (one_file_system) {
1475                                 uint32 *devp = F_DIR_DEV_P(file);
1476                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1477                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1478                         }
1479                 }
1480                 else if (delete_during && f_out != -1 && !phase
1481                     && !(file->flags & FLAG_MISSING_DIR)) {
1482                         if (file->flags & FLAG_CONTENT_DIR)
1483                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1484                         else
1485                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1486                 }
1487                 prior_dir_file = file;
1488                 goto cleanup;
1489         }
1490
1491         /* If we're not preserving permissions, change the file-list's
1492          * mode based on the local permissions and some heuristics. */
1493         if (!preserve_perms) {
1494                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1495                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1496                                        exists);
1497         }
1498
1499 #ifdef SUPPORT_HARD_LINKS
1500         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1501          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1502                 goto cleanup;
1503 #endif
1504
1505         if (preserve_links && S_ISLNK(file->mode)) {
1506 #ifdef SUPPORT_LINKS
1507                 const char *sl = F_SYMLINK(file);
1508                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1509                         if (INFO_GTE(NAME, 1)) {
1510                                 if (solo_file) {
1511                                         /* fname contains the destination path, but we
1512                                          * want to report the source path. */
1513                                         fname = f_name(file, NULL);
1514                                 }
1515                                 rprintf(FINFO,
1516                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1517                                         fname, sl);
1518                         }
1519                         return;
1520                 }
1521                 if (statret == 0) {
1522                         char lnk[MAXPATHLEN];
1523                         int len;
1524
1525                         if (S_ISLNK(sx.st.st_mode)
1526                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1527                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1528                                 /* The link is pointing to the right place. */
1529                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1530                                 if (itemizing)
1531                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1532 #ifdef SUPPORT_HARD_LINKS
1533                                 if (preserve_hard_links && F_IS_HLINKED(file))
1534                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1535 #endif
1536                                 if (remove_source_files == 1)
1537                                         goto return_with_success;
1538                                 goto cleanup;
1539                         }
1540                 } else if (basis_dir[0] != NULL) {
1541                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1542                                               itemizing, code);
1543                         if (j == -2) {
1544 #ifndef CAN_HARDLINK_SYMLINK
1545                                 if (link_dest) {
1546                                         /* Resort to --copy-dest behavior. */
1547                                 } else
1548 #endif
1549                                 if (!copy_dest)
1550                                         goto cleanup;
1551                                 itemizing = 0;
1552                                 code = FNONE;
1553                         } else if (j >= 0) {
1554                                 statret = 1;
1555                                 fnamecmp = fnamecmpbuf;
1556                         }
1557                 }
1558                 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1559                         set_file_attrs(fname, file, NULL, NULL, 0);
1560                         if (itemizing) {
1561                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1562                                         statret = -1;
1563                                 itemize(fnamecmp, file, ndx, statret, &sx,
1564                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1565                         }
1566                         if (code != FNONE && INFO_GTE(NAME, 1))
1567                                 rprintf(code, "%s -> %s\n", fname, sl);
1568 #ifdef SUPPORT_HARD_LINKS
1569                         if (preserve_hard_links && F_IS_HLINKED(file))
1570                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1571 #endif
1572                         /* This does not check remove_source_files == 1
1573                          * because this is one of the items that the old
1574                          * --remove-sent-files option would remove. */
1575                         if (remove_source_files)
1576                                 goto return_with_success;
1577                 }
1578 #endif
1579                 goto cleanup;
1580         }
1581
1582         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1583          || (preserve_specials && IS_SPECIAL(file->mode))) {
1584                 dev_t rdev;
1585                 int del_for_flag = 0;
1586                 if (IS_DEVICE(file->mode)) {
1587                         uint32 *devp = F_RDEV_P(file);
1588                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1589                 } else
1590                         rdev = 0;
1591                 if (statret == 0) {
1592                         if (IS_DEVICE(file->mode)) {
1593                                 if (!IS_DEVICE(sx.st.st_mode))
1594                                         statret = -1;
1595                                 del_for_flag = DEL_FOR_DEVICE;
1596                         } else {
1597                                 if (!IS_SPECIAL(sx.st.st_mode))
1598                                         statret = -1;
1599                                 del_for_flag = DEL_FOR_SPECIAL;
1600                         }
1601                         if (statret == 0
1602                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1603                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1604                                 /* The device or special file is identical. */
1605                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1606                                 if (itemizing)
1607                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1608 #ifdef SUPPORT_HARD_LINKS
1609                                 if (preserve_hard_links && F_IS_HLINKED(file))
1610                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1611 #endif
1612                                 if (remove_source_files == 1)
1613                                         goto return_with_success;
1614                                 goto cleanup;
1615                         }
1616                 } else if (basis_dir[0] != NULL) {
1617                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1618                                               itemizing, code);
1619                         if (j == -2) {
1620 #ifndef CAN_HARDLINK_SPECIAL
1621                                 if (link_dest) {
1622                                         /* Resort to --copy-dest behavior. */
1623                                 } else
1624 #endif
1625                                 if (!copy_dest)
1626                                         goto cleanup;
1627                                 itemizing = 0;
1628                                 code = FNONE;
1629                         } else if (j >= 0) {
1630                                 statret = 1;
1631                                 fnamecmp = fnamecmpbuf;
1632                         }
1633                 }
1634                 if (DEBUG_GTE(GENR, 1)) {
1635                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1636                                 fname, (int)file->mode,
1637                                 (long)major(rdev), (long)minor(rdev));
1638                 }
1639                 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1640                         set_file_attrs(fname, file, NULL, NULL, 0);
1641                         if (itemizing) {
1642                                 itemize(fnamecmp, file, ndx, statret, &sx,
1643                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1644                         }
1645                         if (code != FNONE && INFO_GTE(NAME, 1))
1646                                 rprintf(code, "%s\n", fname);
1647 #ifdef SUPPORT_HARD_LINKS
1648                         if (preserve_hard_links && F_IS_HLINKED(file))
1649                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1650 #endif
1651                         if (remove_source_files == 1)
1652                                 goto return_with_success;
1653                 }
1654                 goto cleanup;
1655         }
1656
1657         if (!S_ISREG(file->mode)) {
1658                 if (solo_file)
1659                         fname = f_name(file, NULL);
1660                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1661                 goto cleanup;
1662         }
1663
1664         if (max_size >= 0 && F_LENGTH(file) > max_size) {
1665                 if (INFO_GTE(SKIP, 1)) {
1666                         if (solo_file)
1667                                 fname = f_name(file, NULL);
1668                         rprintf(FINFO, "%s is over max-size\n", fname);
1669                 }
1670                 goto cleanup;
1671         }
1672         if (min_size >= 0 && F_LENGTH(file) < min_size) {
1673                 if (INFO_GTE(SKIP, 1)) {
1674                         if (solo_file)
1675                                 fname = f_name(file, NULL);
1676                         rprintf(FINFO, "%s is under min-size\n", fname);
1677                 }
1678                 goto cleanup;
1679         }
1680
1681         if (update_only > 0 && statret == 0 && time_diff(&sx.st, file) > 0) {
1682                 if (INFO_GTE(SKIP, 1))
1683                         rprintf(FINFO, "%s is newer\n", fname);
1684 #ifdef SUPPORT_HARD_LINKS
1685                 if (F_IS_HLINKED(file))
1686                         handle_skipped_hlink(file, itemizing, code, f_out);
1687 #endif
1688                 goto cleanup;
1689         }
1690
1691         fnamecmp_type = FNAMECMP_FNAME;
1692
1693         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1694                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1695                         goto cleanup;
1696                 statret = -1;
1697                 stat_errno = ENOENT;
1698         }
1699
1700         if (basis_dir[0] != NULL && (statret != 0 || !copy_dest)) {
1701                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1702                                       statret == 0, itemizing, code);
1703                 if (j == -2) {
1704                         if (remove_source_files == 1)
1705                                 goto return_with_success;
1706                         goto cleanup;
1707                 }
1708                 if (j >= 0) {
1709                         fnamecmp = fnamecmpbuf;
1710                         fnamecmp_type = j;
1711                         statret = 0;
1712                 }
1713         }
1714
1715         init_stat_x(&real_sx);
1716         real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1717         real_ret = statret;
1718
1719         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1720             && link_stat(partialptr, &partial_st, 0) == 0
1721             && S_ISREG(partial_st.st_mode)) {
1722                 if (statret != 0)
1723                         goto prepare_to_open;
1724         } else
1725                 partialptr = NULL;
1726
1727         if (statret != 0 && fuzzy_basis) {
1728                 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1729                 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1730                 if (fuzzy_file) {
1731                         f_name(fuzzy_file, fnamecmpbuf);
1732                         if (DEBUG_GTE(FUZZY, 1)) {
1733                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1734                                         fname, fnamecmpbuf);
1735                         }
1736                         sx.st.st_size = F_LENGTH(fuzzy_file);
1737                         statret = 0;
1738                         fnamecmp = fnamecmpbuf;
1739                 }
1740         }
1741
1742         if (statret != 0) {
1743 #ifdef SUPPORT_HARD_LINKS
1744                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1745                         cur_flist->in_progress++;
1746                         goto cleanup;
1747                 }
1748 #endif
1749                 if (stat_errno == ENOENT)
1750                         goto notify_others;
1751                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1752                         full_fname(fname));
1753                 goto cleanup;
1754         }
1755
1756         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1757                 ;
1758         else if (fnamecmp_type >= FNAMECMP_FUZZY)
1759                 ;
1760         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1761                 if (partialptr) {
1762                         do_unlink(partialptr);
1763                         handle_partial_dir(partialptr, PDIR_DELETE);
1764                 }
1765                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1766                 if (itemizing)
1767                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1768 #ifdef SUPPORT_HARD_LINKS
1769                 if (preserve_hard_links && F_IS_HLINKED(file))
1770                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1771 #endif
1772                 if (remove_source_files != 1)
1773                         goto cleanup;
1774           return_with_success:
1775                 if (!dry_run)
1776                         send_msg_int(MSG_SUCCESS, ndx);
1777                 goto cleanup;
1778         }
1779
1780         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1781 #ifdef SUPPORT_HARD_LINKS
1782                 if (F_IS_HLINKED(file))
1783                         handle_skipped_hlink(file, itemizing, code, f_out);
1784 #endif
1785                 goto cleanup;
1786         }
1787
1788   prepare_to_open:
1789         if (partialptr) {
1790                 sx.st = partial_st;
1791                 fnamecmp = partialptr;
1792                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1793                 statret = 0;
1794         }
1795
1796         if (!do_xfers)
1797                 goto notify_others;
1798
1799         if (read_batch || whole_file) {
1800                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1801                         if (!(backupptr = get_backup_name(fname)))
1802                                 goto cleanup;
1803                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1804                                 goto pretend_missing;
1805                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1806                                 unmake_file(back_file);
1807                                 back_file = NULL;
1808                                 goto cleanup;
1809                         }
1810                 }
1811                 goto notify_others;
1812         }
1813
1814         if (fuzzy_dirlist[0]) {
1815                 int j = flist_find(fuzzy_dirlist[0], file);
1816                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1817                         fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1818         }
1819
1820         /* open the file */
1821         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1822                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1823                         full_fname(fnamecmp));
1824           pretend_missing:
1825                 /* pretend the file didn't exist */
1826 #ifdef SUPPORT_HARD_LINKS
1827                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1828                         cur_flist->in_progress++;
1829                         goto cleanup;
1830                 }
1831 #endif
1832                 statret = real_ret = -1;
1833                 goto notify_others;
1834         }
1835
1836         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1837                 if (!(backupptr = get_backup_name(fname))) {
1838                         close(fd);
1839                         goto cleanup;
1840                 }
1841                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1842                         close(fd);
1843                         goto pretend_missing;
1844                 }
1845                 if (robust_unlink(backupptr) && errno != ENOENT) {
1846                         rsyserr(FERROR_XFER, errno, "unlink %s",
1847                                 full_fname(backupptr));
1848                         unmake_file(back_file);
1849                         back_file = NULL;
1850                         close(fd);
1851                         goto cleanup;
1852                 }
1853                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1854                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1855                         unmake_file(back_file);
1856                         back_file = NULL;
1857                         close(fd);
1858                         goto cleanup;
1859                 }
1860                 fnamecmp_type = FNAMECMP_BACKUP;
1861         }
1862
1863         if (DEBUG_GTE(DELTASUM, 3)) {
1864                 rprintf(FINFO, "gen mapped %s of size %s\n",
1865                         fnamecmp, big_num(sx.st.st_size));
1866         }
1867
1868         if (DEBUG_GTE(DELTASUM, 2))
1869                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1870
1871   notify_others:
1872         if (remove_source_files && !delay_updates && !phase && !dry_run)
1873                 increment_active_files(ndx, itemizing, code);
1874         if (inc_recurse && (!dry_run || write_batch < 0))
1875                 cur_flist->in_progress++;
1876 #ifdef SUPPORT_HARD_LINKS
1877         if (preserve_hard_links && F_IS_HLINKED(file))
1878                 file->flags |= FLAG_FILE_SENT;
1879 #endif
1880         write_ndx(f_out, ndx);
1881         if (itemizing) {
1882                 int iflags = ITEM_TRANSFER;
1883                 if (always_checksum > 0)
1884                         iflags |= ITEM_REPORT_CHANGE;
1885                 if (fnamecmp_type != FNAMECMP_FNAME)
1886                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1887                 if (fnamecmp_type >= FNAMECMP_FUZZY)
1888                         iflags |= ITEM_XNAME_FOLLOWS;
1889                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1890                         fuzzy_file ? fuzzy_file->basename : NULL);
1891                 free_stat_x(&real_sx);
1892         }
1893
1894         if (!do_xfers) {
1895 #ifdef SUPPORT_HARD_LINKS
1896                 if (preserve_hard_links && F_IS_HLINKED(file))
1897                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1898 #endif
1899                 goto cleanup;
1900         }
1901         if (read_batch)
1902                 goto cleanup;
1903
1904         if (statret != 0 || whole_file)
1905                 write_sum_head(f_out, NULL);
1906         else if (sx.st.st_size <= 0) {
1907                 write_sum_head(f_out, NULL);
1908                 close(fd);
1909         } else {
1910                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1911                         rprintf(FWARNING,
1912                             "WARNING: file is too large for checksum sending: %s\n",
1913                             fnamecmp);
1914                         write_sum_head(f_out, NULL);
1915                 }
1916                 close(fd);
1917         }
1918
1919   cleanup:
1920         if (back_file) {
1921                 int save_preserve_xattrs = preserve_xattrs;
1922                 if (f_copy >= 0)
1923                         close(f_copy);
1924 #ifdef SUPPORT_XATTRS
1925                 if (preserve_xattrs) {
1926                         copy_xattrs(fname, backupptr);
1927                         preserve_xattrs = 0;
1928                 }
1929 #endif
1930                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1931                 preserve_xattrs = save_preserve_xattrs;
1932                 if (INFO_GTE(BACKUP, 1)) {
1933                         rprintf(FINFO, "backed up %s to %s\n",
1934                                 fname, backupptr);
1935                 }
1936                 unmake_file(back_file);
1937         }
1938
1939         free_stat_x(&sx);
1940 }
1941
1942 /* If we are replacing an existing hard link, symlink, device, or special file,
1943  * create a temp-name item and rename it into place.  A symlimk specifies slnk,
1944  * a hard link specifies hlnk, otherwise we create a device based on rdev.
1945  * Specify 0 for the del_for_flag if there is not a file to replace.  This
1946  * returns 1 on success and 0 on failure. */
1947 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1948                   dev_t rdev, stat_x *sxp, int del_for_flag)
1949 {
1950         char tmpname[MAXPATHLEN];
1951         const char *create_name;
1952         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1953
1954         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1955                 skip_atomic = 1;
1956         else
1957                 skip_atomic = 0;
1958
1959         if (del_for_flag) {
1960                 if (make_backups > 0 && !dir_in_the_way) {
1961                         if (!make_backup(fname, skip_atomic))
1962                                 return 0;
1963                 } else if (skip_atomic) {
1964                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1965                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1966                                 return 0;
1967                 }
1968         }
1969
1970         create_name = skip_atomic ? fname : tmpname;
1971
1972         if (slnk) {
1973 #ifdef SUPPORT_LINKS
1974                 if (do_symlink(slnk, create_name) < 0) {
1975                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1976                                 full_fname(create_name), slnk);
1977                         return 0;
1978                 }
1979 #else
1980                 return 0;
1981 #endif
1982         } else if (hlnk) {
1983 #ifdef SUPPORT_HARD_LINKS
1984                 if (!hard_link_one(file, create_name, hlnk, 0))
1985                         return 0;
1986 #else
1987                 return 0;
1988 #endif
1989         } else {
1990                 if (do_mknod(create_name, file->mode, rdev) < 0) {
1991                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1992                                 full_fname(create_name));
1993                         return 0;
1994                 }
1995         }
1996
1997         if (!skip_atomic) {
1998                 if (do_rename(tmpname, fname) < 0) {
1999                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
2000                                 full_fname(tmpname), full_fname(fname));
2001                         do_unlink(tmpname);
2002                         return 0;
2003                 }
2004         }
2005
2006         return 1;
2007 }
2008
2009 #ifdef SUPPORT_HARD_LINKS
2010 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2011                                  enum logcode code, int f_out)
2012 {
2013         char fbuf[MAXPATHLEN];
2014         int new_last_ndx;
2015         struct file_list *save_flist = cur_flist;
2016
2017         /* If we skip the last item in a chain of links and there was a
2018          * prior non-skipped hard-link waiting to finish, finish it now. */
2019         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2020                 return;
2021
2022         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2023         cur_flist->in_progress--; /* undo prior increment */
2024         f_name(file, fbuf);
2025         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2026
2027         cur_flist = save_flist;
2028 }
2029 #endif
2030
2031 static void touch_up_dirs(struct file_list *flist, int ndx)
2032 {
2033         static int counter = 0;
2034         struct file_struct *file;
2035         char *fname;
2036         BOOL fix_dir_perms;
2037         int i, start, end;
2038
2039         if (ndx < 0) {
2040                 start = 0;
2041                 end = flist->used - 1;
2042         } else
2043                 start = end = ndx;
2044
2045         /* Fix any directory permissions that were modified during the
2046          * transfer and/or re-set any tweaked modified-time values. */
2047         for (i = start; i <= end; i++, counter++) {
2048                 file = flist->files[i];
2049                 if (!F_IS_ACTIVE(file))
2050                         continue;
2051                 if (!S_ISDIR(file->mode)
2052                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2053                         continue;
2054                 if (DEBUG_GTE(TIME, 2)) {
2055                         fname = f_name(file, NULL);
2056                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2057                                 NS(fname), i);
2058                 }
2059                 /* Be sure not to retouch permissions with --fake-super. */
2060                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2061                 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2062                         continue;
2063                 fname = f_name(file, NULL);
2064                 if (fix_dir_perms)
2065                         do_chmod(fname, file->mode);
2066                 if (need_retouch_dir_times) {
2067                         STRUCT_STAT st;
2068                         if (link_stat(fname, &st, 0) == 0 && time_diff(&st, file))
2069                                 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
2070                 }
2071                 if (counter >= loopchk_limit) {
2072                         if (allowed_lull)
2073                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2074                         else
2075                                 maybe_flush_socket(0);
2076                         counter = 0;
2077                 }
2078         }
2079 }
2080
2081 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2082 {
2083         struct file_struct *file;
2084         struct file_list *flist;
2085         char fbuf[MAXPATHLEN];
2086         int ndx;
2087
2088         while (1) {
2089 #ifdef SUPPORT_HARD_LINKS
2090                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2091                         int send_failed = (ndx == -2);
2092                         if (send_failed)
2093                                 ndx = get_hlink_num();
2094                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2095                         file = flist->files[ndx - flist->ndx_start];
2096                         assert(file->flags & FLAG_HLINKED);
2097                         if (send_failed)
2098                                 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2099                         else
2100                                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2101                         flist->in_progress--;
2102                         continue;
2103                 }
2104 #endif
2105
2106                 if (check_redo && (ndx = get_redo_num()) != -1) {
2107                         OFF_T save_max_size = max_size;
2108                         OFF_T save_min_size = min_size;
2109                         csum_length = SUM_LENGTH;
2110                         max_size = -1;
2111                         min_size = -1;
2112                         ignore_existing = -ignore_existing;
2113                         ignore_non_existing = -ignore_non_existing;
2114                         update_only = -update_only;
2115                         always_checksum = -always_checksum;
2116                         size_only = -size_only;
2117                         append_mode = -append_mode;
2118                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2119                         ignore_times++;
2120
2121                         flist = cur_flist;
2122                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2123
2124                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2125                         if (solo_file)
2126                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2127                         else
2128                                 f_name(file, fbuf);
2129                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2130                         cur_flist->to_redo--;
2131
2132                         cur_flist = flist;
2133
2134                         csum_length = SHORT_SUM_LENGTH;
2135                         max_size = save_max_size;
2136                         min_size = save_min_size;
2137                         ignore_existing = -ignore_existing;
2138                         ignore_non_existing = -ignore_non_existing;
2139                         update_only = -update_only;
2140                         always_checksum = -always_checksum;
2141                         size_only = -size_only;
2142                         append_mode = -append_mode;
2143                         make_backups = -make_backups;
2144                         ignore_times--;
2145                         continue;
2146                 }
2147
2148                 if (cur_flist == first_flist)
2149                         break;
2150
2151                 /* We only get here if inc_recurse is enabled. */
2152                 if (first_flist->in_progress || first_flist->to_redo)
2153                         break;
2154
2155                 write_ndx(sock_f_out, NDX_DONE);
2156                 if (!read_batch && !flist_eof) {
2157                         int old_total = 0;
2158                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2159                                 old_total += flist->used;
2160                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2161                 }
2162
2163                 if (delete_during == 2 || !dir_tweaking) {
2164                         /* Skip directory touch-up. */
2165                 } else if (first_flist->parent_ndx >= 0)
2166                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2167
2168                 flist_free(first_flist); /* updates first_flist */
2169         }
2170 }
2171
2172 void generate_files(int f_out, const char *local_name)
2173 {
2174         int i, ndx, next_loopchk = 0;
2175         char fbuf[MAXPATHLEN];
2176         int itemizing;
2177         enum logcode code;
2178         int save_info_flist = info_levels[INFO_FLIST];
2179         int save_info_progress = info_levels[INFO_PROGRESS];
2180
2181         if (protocol_version >= 29) {
2182                 itemizing = 1;
2183                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2184                 code = logfile_format_has_i ? FNONE : FLOG;
2185         } else if (am_daemon) {
2186                 itemizing = logfile_format_has_i && do_xfers;
2187                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2188                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2189         } else if (!am_server) {
2190                 itemizing = stdout_format_has_i;
2191                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2192                 code = itemizing ? FNONE : FINFO;
2193         } else {
2194                 itemizing = 0;
2195                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2196                 code = FINFO;
2197         }
2198         solo_file = local_name;
2199         dir_tweaking = !(list_only || solo_file || dry_run);
2200         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2201         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2202         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2203             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2204         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2205
2206         if (DEBUG_GTE(GENR, 1))
2207                 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2208
2209         if (delete_before && !solo_file && cur_flist->used > 0)
2210                 do_delete_pass();
2211         if (delete_during == 2) {
2212                 deldelay_size = BIGPATHBUFLEN * 4;
2213                 deldelay_buf = new_array(char, deldelay_size);
2214                 if (!deldelay_buf)
2215                         out_of_memory("delete-delay");
2216         }
2217         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2218
2219         if (append_mode > 0 || whole_file < 0)
2220                 whole_file = 0;
2221         if (DEBUG_GTE(FLIST, 1)) {
2222                 rprintf(FINFO, "delta-transmission %s\n",
2223                         whole_file
2224                         ? "disabled for local transfer or --whole-file"
2225                         : "enabled");
2226         }
2227
2228         dflt_perms = (ACCESSPERMS & ~orig_umask);
2229
2230         do {
2231 #ifdef SUPPORT_HARD_LINKS
2232                 if (preserve_hard_links && inc_recurse) {
2233                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2234                                 wait_for_receiver();
2235                 }
2236 #endif
2237
2238                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2239                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2240                         if (solo_file)
2241                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2242                         else
2243                                 f_name(fp, fbuf);
2244                         ndx = cur_flist->ndx_start - 1;
2245                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2246                         if (delete_during && dry_run < 2 && !list_only
2247                          && !(fp->flags & FLAG_MISSING_DIR)) {
2248                                 if (fp->flags & FLAG_CONTENT_DIR) {
2249                                         dev_t dirdev;
2250                                         if (one_file_system) {
2251                                                 uint32 *devp = F_DIR_DEV_P(fp);
2252                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2253                                         } else
2254                                                 dirdev = MAKEDEV(0, 0);
2255                                         delete_in_dir(fbuf, fp, &dirdev);
2256                                 } else
2257                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2258                         }
2259                 }
2260                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2261                         struct file_struct *file = cur_flist->sorted[i];
2262
2263                         if (!F_IS_ACTIVE(file))
2264                                 continue;
2265
2266                         if (unsort_ndx)
2267                                 ndx = F_NDX(file);
2268                         else
2269                                 ndx = i + cur_flist->ndx_start;
2270
2271                         if (solo_file)
2272                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2273                         else
2274                                 f_name(file, fbuf);
2275                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2276
2277                         check_for_finished_files(itemizing, code, 0);
2278
2279                         if (i + cur_flist->ndx_start >= next_loopchk) {
2280                                 if (allowed_lull)
2281                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2282                                 else
2283                                         maybe_flush_socket(0);
2284                                 next_loopchk += loopchk_limit;
2285                         }
2286                 }
2287
2288                 if (!inc_recurse) {
2289                         write_ndx(f_out, NDX_DONE);
2290                         break;
2291                 }
2292
2293                 while (1) {
2294                         check_for_finished_files(itemizing, code, 1);
2295                         if (cur_flist->next || flist_eof)
2296                                 break;
2297                         wait_for_receiver();
2298                 }
2299         } while ((cur_flist = cur_flist->next) != NULL);
2300
2301         if (delete_during)
2302                 delete_in_dir(NULL, NULL, &dev_zero);
2303         phase++;
2304         if (DEBUG_GTE(GENR, 1))
2305                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2306
2307         while (1) {
2308                 check_for_finished_files(itemizing, code, 1);
2309                 if (msgdone_cnt)
2310                         break;
2311                 wait_for_receiver();
2312         }
2313
2314         phase++;
2315         if (DEBUG_GTE(GENR, 1))
2316                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2317
2318         write_ndx(f_out, NDX_DONE);
2319
2320         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2321         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2322                 write_ndx(f_out, NDX_DONE);
2323
2324         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2325                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2326                         write_del_stats(f_out);
2327                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2328                         write_ndx(f_out, NDX_DONE);
2329         }
2330
2331         /* Read MSG_DONE for the redo phase (and any prior messages). */
2332         while (1) {
2333                 check_for_finished_files(itemizing, code, 0);
2334                 if (msgdone_cnt > 1)
2335                         break;
2336                 wait_for_receiver();
2337         }
2338
2339         if (protocol_version >= 29) {
2340                 phase++;
2341                 if (DEBUG_GTE(GENR, 1))
2342                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2343                 if (!EARLY_DELAY_DONE_MSG()) {
2344                         write_ndx(f_out, NDX_DONE);
2345                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2346                                 write_ndx(f_out, NDX_DONE);
2347                 }
2348                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2349                 while (msgdone_cnt == 2)
2350                         wait_for_receiver();
2351         }
2352
2353         info_levels[INFO_FLIST] = save_info_flist;
2354         info_levels[INFO_PROGRESS] = save_info_progress;
2355
2356         if (delete_during == 2)
2357                 do_delayed_deletions(fbuf);
2358         if (delete_after && !solo_file && file_total > 0)
2359                 do_delete_pass();
2360
2361         if (max_delete >= 0 && skipped_deletes) {
2362                 rprintf(FWARNING,
2363                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2364                         skipped_deletes);
2365                 io_error |= IOERR_DEL_LIMIT;
2366         }
2367
2368         if (protocol_version >= 31) {
2369                 if (!EARLY_DELETE_DONE_MSG()) {
2370                         if (INFO_GTE(STATS, 2) || read_batch)
2371                                 write_del_stats(f_out);
2372                         write_ndx(f_out, NDX_DONE);
2373                 }
2374
2375                 /* Read MSG_DONE for late-delete phase & prior messages. */
2376                 while (msgdone_cnt == 3)
2377                         wait_for_receiver();
2378         }
2379
2380         if ((need_retouch_dir_perms || need_retouch_dir_times)
2381          && dir_tweaking && (!inc_recurse || delete_during == 2))
2382                 touch_up_dirs(dir_flist, -1);
2383
2384         if (DEBUG_GTE(GENR, 1))
2385                 rprintf(FINFO, "generate_files finished\n");
2386 }