Avoid a compiler error/warning about shifting a negative value.
[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) 2003-2018 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 int maybe_ATTRS_SET_NANO = 0;
103
104 static dev_t dev_zero;
105 static int deldelay_size = 0, deldelay_cnt = 0;
106 static char *deldelay_buf = NULL;
107 static int deldelay_fd = -1;
108 static int loopchk_limit;
109 static int dir_tweaking;
110 static int symlink_timeset_failed_flags;
111 static int need_retouch_dir_times;
112 static int need_retouch_dir_perms;
113 static const char *solo_file = NULL;
114
115 enum nonregtype {
116     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
117 };
118
119 /* Forward declarations. */
120 #ifdef SUPPORT_HARD_LINKS
121 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
122                                  enum logcode code, int f_out);
123 #endif
124
125 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
126 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
127
128 static int start_delete_delay_temp(void)
129 {
130         char fnametmp[MAXPATHLEN];
131         int save_dry_run = dry_run;
132
133         dry_run = 0;
134         if (!get_tmpname(fnametmp, "deldelay", False)
135          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
136                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
137                         inc_recurse ? "" : " -- switching to --delete-after");
138                 delete_during = 0;
139                 delete_after = !inc_recurse;
140                 dry_run = save_dry_run;
141                 return 0;
142         }
143         unlink(fnametmp);
144         dry_run = save_dry_run;
145         return 1;
146 }
147
148 static int flush_delete_delay(void)
149 {
150         if (deldelay_fd < 0 && !start_delete_delay_temp())
151                 return 0;
152         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
153                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
154                 delete_during = 0;
155                 delete_after = !inc_recurse;
156                 close(deldelay_fd);
157                 return 0;
158         }
159         deldelay_cnt = 0;
160         return 1;
161 }
162
163 static int remember_delete(struct file_struct *file, const char *fname, int flags)
164 {
165         int len;
166
167         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
168                 return 0;
169
170         if (flags & DEL_NO_UID_WRITE)
171                 deldelay_buf[deldelay_cnt++] = '!';
172
173         while (1) {
174                 len = snprintf(deldelay_buf + deldelay_cnt,
175                                deldelay_size - deldelay_cnt,
176                                "%x %s%c",
177                                (int)file->mode, fname, '\0');
178                 if ((deldelay_cnt += len) <= deldelay_size)
179                         break;
180                 deldelay_cnt -= len;
181                 if (!flush_delete_delay())
182                         return 0;
183         }
184
185         return 1;
186 }
187
188 static int read_delay_line(char *buf, int *flags_p)
189 {
190         static int read_pos = 0;
191         int j, len, mode;
192         char *bp, *past_space;
193
194         while (1) {
195                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
196                 if (j < deldelay_cnt)
197                         break;
198                 if (deldelay_fd < 0) {
199                         if (j > read_pos)
200                                 goto invalid_data;
201                         return -1;
202                 }
203                 deldelay_cnt -= read_pos;
204                 if (deldelay_cnt == deldelay_size)
205                         goto invalid_data;
206                 if (deldelay_cnt && read_pos) {
207                         memmove(deldelay_buf, deldelay_buf + read_pos,
208                                 deldelay_cnt);
209                 }
210                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
211                            deldelay_size - deldelay_cnt);
212                 if (len == 0) {
213                         if (deldelay_cnt) {
214                                 rprintf(FERROR,
215                                     "ERROR: unexpected EOF in delete-delay file.\n");
216                         }
217                         return -1;
218                 }
219                 if (len < 0) {
220                         rsyserr(FERROR, errno,
221                                 "reading delete-delay file");
222                         return -1;
223                 }
224                 deldelay_cnt += len;
225                 read_pos = 0;
226         }
227
228         bp = deldelay_buf + read_pos;
229         if (*bp == '!') {
230                 bp++;
231                 *flags_p = DEL_NO_UID_WRITE;
232         } else
233                 *flags_p = 0;
234
235         if (sscanf(bp, "%x ", &mode) != 1) {
236           invalid_data:
237                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
238                 return -1;
239         }
240         past_space = strchr(bp, ' ') + 1;
241         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
242         read_pos = j + 1;
243
244         if (len > MAXPATHLEN) {
245                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
246                 return -1;
247         }
248
249         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
250          * instead of returning a pointer to our buffer. */
251         memcpy(buf, past_space, len);
252
253         return mode;
254 }
255
256 static void do_delayed_deletions(char *delbuf)
257 {
258         int mode, flags;
259
260         if (deldelay_fd >= 0) {
261                 if (deldelay_cnt && !flush_delete_delay())
262                         return;
263                 lseek(deldelay_fd, 0, 0);
264         }
265         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
266                 delete_item(delbuf, mode, flags | DEL_RECURSE);
267         if (deldelay_fd >= 0)
268                 close(deldelay_fd);
269 }
270
271 /* This function is used to implement per-directory deletion, and is used by
272  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
273  * MAXPATHLEN buffer with the name of the directory in it (the functions we
274  * call will append names onto the end, but the old dir value will be restored
275  * on exit). */
276 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
277 {
278         static int already_warned = 0;
279         struct file_list *dirlist;
280         char delbuf[MAXPATHLEN];
281         int dlen, i;
282
283         if (!fbuf) {
284                 change_local_filter_dir(NULL, 0, 0);
285                 return;
286         }
287
288         if (DEBUG_GTE(DEL, 2))
289                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
290
291         if (allowed_lull)
292                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
293
294         if (io_error & IOERR_GENERAL && !ignore_errors) {
295                 if (already_warned)
296                         return;
297                 rprintf(FINFO,
298                         "IO error encountered -- skipping file deletion\n");
299                 already_warned = 1;
300                 return;
301         }
302
303         dlen = strlen(fbuf);
304         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
305
306         if (one_file_system) {
307                 if (file->flags & FLAG_TOP_DIR)
308                         filesystem_dev = *fs_dev;
309                 else if (filesystem_dev != *fs_dev)
310                         return;
311         }
312
313         dirlist = get_dirlist(fbuf, dlen, 0);
314
315         /* If an item in dirlist is not found in flist, delete it
316          * from the filesystem. */
317         for (i = dirlist->used; i--; ) {
318                 struct file_struct *fp = dirlist->files[i];
319                 if (!F_IS_ACTIVE(fp))
320                         continue;
321                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
322                         if (INFO_GTE(MOUNT, 1))
323                                 rprintf(FINFO, "cannot delete mount point: %s\n",
324                                         f_name(fp, NULL));
325                         continue;
326                 }
327                 /* Here we want to match regardless of file type.  Replacement
328                  * of a file with one of another type is handled separately by
329                  * a delete_item call with a DEL_MAKE_ROOM flag. */
330                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
331                         int flags = DEL_RECURSE;
332                         if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
333                                 flags |= DEL_NO_UID_WRITE;
334                         f_name(fp, delbuf);
335                         if (delete_during == 2) {
336                                 if (!remember_delete(fp, delbuf, flags))
337                                         break;
338                         } else
339                                 delete_item(delbuf, fp->mode, flags);
340                 }
341         }
342
343         flist_free(dirlist);
344 }
345
346 /* This deletes any files on the receiving side that are not present on the
347  * sending side.  This is used by --delete-before and --delete-after. */
348 static void do_delete_pass(void)
349 {
350         char fbuf[MAXPATHLEN];
351         STRUCT_STAT st;
352         int j;
353
354         /* dry_run is incremented when the destination doesn't exist yet. */
355         if (dry_run > 1 || list_only)
356                 return;
357
358         for (j = 0; j < cur_flist->used; j++) {
359                 struct file_struct *file = cur_flist->sorted[j];
360
361                 if (!F_IS_ACTIVE(file))
362                         continue;
363
364                 f_name(file, fbuf);
365
366                 if (!(file->flags & FLAG_CONTENT_DIR)) {
367                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
368                         continue;
369                 }
370
371                 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
372                         rprintf(FINFO, "deleting in %s\n", fbuf);
373
374                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
375                  || !S_ISDIR(st.st_mode))
376                         continue;
377
378                 delete_in_dir(fbuf, file, &st.st_dev);
379         }
380         delete_in_dir(NULL, NULL, &dev_zero);
381
382         if (INFO_GTE(FLIST, 2) && !am_server)
383                 rprintf(FINFO, "                    \r");
384 }
385
386 static inline int time_diff(STRUCT_STAT *stp, struct file_struct *file)
387 {
388 #ifdef ST_MTIME_NSEC
389         return cmp_time(stp->st_mtime, stp->ST_MTIME_NSEC, file->modtime, F_MOD_NSEC(file));
390 #else
391         return cmp_time(stp->st_mtime, 0L, file->modtime, 0L);
392 #endif
393 }
394
395 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
396 {
397         if (preserve_perms)
398                 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
399
400         if (preserve_executability)
401                 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
402
403         return 0;
404 }
405
406 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
407 {
408         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
409                 return 1;
410
411         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
412                 return 1;
413
414         return 0;
415 }
416
417 #ifdef SUPPORT_ACLS
418 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
419 {
420         if (preserve_acls) {
421                 if (!ACL_READY(*sxp))
422                         get_acl(fname, sxp);
423                 if (set_acl(NULL, file, sxp, file->mode))
424                         return 1;
425         }
426
427         return 0;
428 }
429 #endif
430
431 #ifdef SUPPORT_XATTRS
432 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
433 {
434         if (preserve_xattrs) {
435                 if (!XATTR_READY(*sxp))
436                         get_xattr(fname, sxp);
437                 if (xattr_diff(file, sxp, 0))
438                         return 1;
439         }
440
441         return 0;
442 }
443 #endif
444
445 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
446 {
447         if (S_ISLNK(file->mode)) {
448 #ifdef CAN_SET_SYMLINK_TIMES
449                 if (preserve_times & PRESERVE_LINK_TIMES && time_diff(&sxp->st, file))
450                         return 0;
451 #endif
452 #ifdef CAN_CHMOD_SYMLINK
453                 if (perms_differ(file, sxp))
454                         return 0;
455 #endif
456 #ifdef CAN_CHOWN_SYMLINK
457                 if (ownership_differs(file, sxp))
458                         return 0;
459 #endif
460 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
461                 if (acls_differ(fname, file, sxp))
462                         return 0;
463 #endif
464 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
465                 if (xattrs_differ(fname, file, sxp))
466                         return 0;
467 #endif
468         } else {
469                 if (preserve_times && time_diff(&sxp->st, file))
470                         return 0;
471                 if (perms_differ(file, sxp))
472                         return 0;
473                 if (ownership_differs(file, sxp))
474                         return 0;
475 #ifdef SUPPORT_ACLS
476                 if (acls_differ(fname, file, sxp))
477                         return 0;
478 #endif
479 #ifdef SUPPORT_XATTRS
480                 if (xattrs_differ(fname, file, sxp))
481                         return 0;
482 #endif
483         }
484
485         return 1;
486 }
487
488 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
489              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
490              const char *xname)
491 {
492         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
493                 int keep_time = !preserve_times ? 0
494                     : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
495                     : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
496                     : 1;
497
498                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
499                         iflags |= ITEM_REPORT_SIZE;
500                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
501                         if (iflags & ITEM_LOCAL_CHANGE)
502                                 iflags |= symlink_timeset_failed_flags;
503                 } else if (keep_time
504                  ? time_diff(&sxp->st, file)
505                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
506                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
507                         iflags |= ITEM_REPORT_TIME;
508 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
509                 if (S_ISLNK(file->mode)) {
510                         ;
511                 } else
512 #endif
513                 if (preserve_perms) {
514                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
515                                 iflags |= ITEM_REPORT_PERMS;
516                 } else if (preserve_executability
517                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
518                         iflags |= ITEM_REPORT_PERMS;
519                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
520                         iflags |= ITEM_REPORT_OWNER;
521                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
522                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
523                         iflags |= ITEM_REPORT_GROUP;
524 #ifdef SUPPORT_ACLS
525                 if (preserve_acls && !S_ISLNK(file->mode)) {
526                         if (!ACL_READY(*sxp))
527                                 get_acl(fnamecmp, sxp);
528                         if (set_acl(NULL, file, sxp, file->mode))
529                                 iflags |= ITEM_REPORT_ACL;
530                 }
531 #endif
532 #ifdef SUPPORT_XATTRS
533                 if (preserve_xattrs) {
534                         if (!XATTR_READY(*sxp))
535                                 get_xattr(fnamecmp, sxp);
536                         if (xattr_diff(file, sxp, 1))
537                                 iflags |= ITEM_REPORT_XATTR;
538                 }
539 #endif
540         } else {
541 #ifdef SUPPORT_XATTRS
542                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
543                         iflags |= ITEM_REPORT_XATTR;
544 #endif
545                 iflags |= ITEM_IS_NEW;
546         }
547
548         iflags &= 0xffff;
549         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
550           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
551                 if (protocol_version >= 29) {
552                         if (ndx >= 0)
553                                 write_ndx(sock_f_out, ndx);
554                         write_shortint(sock_f_out, iflags);
555                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
556                                 write_byte(sock_f_out, fnamecmp_type);
557                         if (iflags & ITEM_XNAME_FOLLOWS)
558                                 write_vstring(sock_f_out, xname, strlen(xname));
559 #ifdef SUPPORT_XATTRS
560                         if (preserve_xattrs && do_xfers
561                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
562                                 int fd = iflags & ITEM_REPORT_XATTR
563                                       && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
564                                        ? sock_f_out : -1;
565                                 send_xattr_request(NULL, file, fd);
566                         }
567 #endif
568                 } else if (ndx >= 0) {
569                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
570                         log_item(code, file, iflags, xname);
571                 }
572         }
573 }
574
575
576 /* Perform our quick-check heuristic for determining if a file is unchanged. */
577 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
578 {
579         if (st->st_size != F_LENGTH(file))
580                 return 0;
581
582         /* if always checksum is set then we use the checksum instead
583            of the file time to determine whether to sync */
584         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
585                 char sum[MAX_DIGEST_LEN];
586                 file_checksum(fn, st, sum);
587                 return memcmp(sum, F_SUM(file), flist_csum_len) == 0;
588         }
589
590         if (size_only > 0)
591                 return 1;
592
593         if (ignore_times)
594                 return 0;
595
596         return time_diff(st, file) == 0;
597 }
598
599
600 /*
601  * set (initialize) the size entries in the per-file sum_struct
602  * calculating dynamic block and checksum sizes.
603  *
604  * This is only called from generate_and_send_sums() but is a separate
605  * function to encapsulate the logic.
606  *
607  * The block size is a rounded square root of file length.
608  *
609  * The checksum size is determined according to:
610  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
611  * provided by Donovan Baarda which gives a probability of rsync
612  * algorithm corrupting data and falling back using the whole md4
613  * checksums.
614  *
615  * This might be made one of several selectable heuristics.
616  */
617 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
618 {
619         int32 blength;
620         int s2length;
621         int64 l;
622
623         if (len < 0) {
624                 /* The file length overflowed our int64 var, so we can't process this file. */
625                 sum->count = -1; /* indicate overflow error */
626                 return;
627         }
628
629         if (block_size)
630                 blength = block_size;
631         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
632                 blength = BLOCK_SIZE;
633         else {
634                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
635                 int32 c;
636                 int cnt;
637                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
638                 if (c < 0 || c >= max_blength)
639                         blength = max_blength;
640                 else {
641                     blength = 0;
642                     do {
643                             blength |= c;
644                             if (len < (int64)blength * blength)
645                                     blength &= ~c;
646                             c >>= 1;
647                     } while (c >= 8);   /* round to multiple of 8 */
648                     blength = MAX(blength, BLOCK_SIZE);
649                 }
650         }
651
652         if (protocol_version < 27) {
653                 s2length = csum_length;
654         } else if (csum_length == SUM_LENGTH) {
655                 s2length = SUM_LENGTH;
656         } else {
657                 int32 c;
658                 int b = BLOCKSUM_BIAS;
659                 for (l = len; l >>= 1; b += 2) {}
660                 for (c = blength; (c >>= 1) && b; b--) {}
661                 /* add a bit, subtract rollsum, round up. */
662                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
663                 s2length = MAX(s2length, csum_length);
664                 s2length = MIN(s2length, SUM_LENGTH);
665         }
666
667         sum->flength    = len;
668         sum->blength    = blength;
669         sum->s2length   = s2length;
670         sum->remainder  = (int32)(len % blength);
671         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
672
673         if ((int64)sum->count != l)
674                 sum->count = -1;
675
676         if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
677                 rprintf(FINFO,
678                         "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
679                         big_num(sum->count), (long)sum->remainder, (long)sum->blength,
680                         sum->s2length, big_num(sum->flength));
681         }
682 }
683
684
685 /*
686  * Generate and send a stream of signatures/checksums that describe a buffer
687  *
688  * Generate approximately one checksum every block_len bytes.
689  */
690 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
691 {
692         int32 i;
693         struct map_struct *mapbuf;
694         struct sum_struct sum;
695         OFF_T offset = 0;
696
697         sum_sizes_sqroot(&sum, len);
698         if (sum.count < 0)
699                 return -1;
700         write_sum_head(f_out, &sum);
701
702         if (append_mode > 0 && f_copy < 0)
703                 return 0;
704
705         if (len > 0)
706                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
707         else
708                 mapbuf = NULL;
709
710         for (i = 0; i < sum.count; i++) {
711                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
712                 char *map = map_ptr(mapbuf, offset, n1);
713                 char sum2[SUM_LENGTH];
714                 uint32 sum1;
715
716                 len -= n1;
717                 offset += n1;
718
719                 if (f_copy >= 0) {
720                         full_write(f_copy, map, n1);
721                         if (append_mode > 0)
722                                 continue;
723                 }
724
725                 sum1 = get_checksum1(map, n1);
726                 get_checksum2(map, n1, sum2);
727
728                 if (DEBUG_GTE(DELTASUM, 3)) {
729                         rprintf(FINFO,
730                                 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
731                                 big_num(i), big_num(offset - n1), (long)n1,
732                                 (unsigned long)sum1);
733                 }
734                 write_int(f_out, sum1);
735                 write_buf(f_out, sum2, sum.s2length);
736         }
737
738         if (mapbuf)
739                 unmap_file(mapbuf);
740
741         return 0;
742 }
743
744
745 /* Try to find a filename in the same dir as "fname" with a similar name. */
746 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
747 {
748         int fname_len, fname_suf_len;
749         const char *fname_suf, *fname = file->basename;
750         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
751         int i, j;
752         struct file_struct *lowest_fp = NULL;
753
754         fname_len = strlen(fname);
755         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
756
757         /* Try to find an exact size+mtime match first. */
758         for (i = 0; i < fuzzy_basis; i++) {
759                 struct file_list *dirlist = dirlist_array[i];
760
761                 if (!dirlist)
762                         continue;
763
764                 for (j = 0; j < dirlist->used; j++) {
765                         struct file_struct *fp = dirlist->files[j];
766
767                         if (!F_IS_ACTIVE(fp))
768                                 continue;
769
770                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
771                                 continue;
772
773                         if (F_LENGTH(fp) == F_LENGTH(file) && cmp_time(fp->modtime, 0L, file->modtime, 0L) == 0) {
774                                 if (DEBUG_GTE(FUZZY, 2))
775                                         rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
776                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
777                                 return fp;
778                         }
779
780                 }
781         }
782
783         for (i = 0; i < fuzzy_basis; i++) {
784                 struct file_list *dirlist = dirlist_array[i];
785
786                 if (!dirlist)
787                         continue;
788
789                 for (j = 0; j < dirlist->used; j++) {
790                         struct file_struct *fp = dirlist->files[j];
791                         const char *suf, *name;
792                         int len, suf_len;
793                         uint32 dist;
794
795                         if (!F_IS_ACTIVE(fp))
796                                 continue;
797
798                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
799                                 continue;
800
801                         name = fp->basename;
802                         len = strlen(name);
803                         suf = find_filename_suffix(name, len, &suf_len);
804
805                         dist = fuzzy_distance(name, len, fname, fname_len);
806                         /* Add some extra weight to how well the suffixes match. */
807                         dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
808                         if (DEBUG_GTE(FUZZY, 2)) {
809                                 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
810                                         f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
811                         }
812                         if (dist <= lowest_dist) {
813                                 lowest_dist = dist;
814                                 lowest_fp = fp;
815                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
816                         }
817                 }
818         }
819
820         return lowest_fp;
821 }
822
823 /* Copy a file found in our --copy-dest handling. */
824 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
825 {
826         char buf[MAXPATHLEN];
827         const char *copy_to, *partialptr;
828         int save_preserve_xattrs = preserve_xattrs;
829         int ok, fd_w;
830
831         if (inplace) {
832                 /* Let copy_file open the destination in place. */
833                 fd_w = -1;
834                 copy_to = dest;
835         } else {
836                 fd_w = open_tmpfile(buf, dest, file);
837                 if (fd_w < 0)
838                         return -1;
839                 copy_to = buf;
840         }
841         cleanup_set(copy_to, NULL, NULL, -1, -1);
842         if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
843                 if (INFO_GTE(COPY, 1)) {
844                         rsyserr(FINFO, errno, "copy_file %s => %s",
845                                 full_fname(src), copy_to);
846                 }
847                 /* Try to clean up. */
848                 unlink(copy_to);
849                 cleanup_disable();
850                 return -1;
851         }
852         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
853         preserve_xattrs = 0; /* xattrs were copied with file */
854         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
855         preserve_xattrs = save_preserve_xattrs;
856         cleanup_disable();
857         return ok ? 0 : -1;
858 }
859
860 /* This is only called for regular files.  We return -2 if we've finished
861  * handling the file, -1 if no dest-linking occurred, or a non-negative
862  * value if we found an alternate basis file.  If we're called with the
863  * find_exact_for_existing flag, the destination file already exists, so
864  * we only try to find an exact alt-dest match.  In this case, the returns
865  * are only -2 & -1 (both as above). */
866 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
867                          char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
868                          int itemizing, enum logcode code)
869 {
870         STRUCT_STAT real_st = sxp->st;
871         int best_match = -1;
872         int match_level = 0;
873         int j = 0;
874
875         do {
876                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
877                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
878                         continue;
879                 switch (match_level) {
880                 case 0:
881                         best_match = j;
882                         match_level = 1;
883                         /* FALL THROUGH */
884                 case 1:
885                         if (!unchanged_file(cmpbuf, file, &sxp->st))
886                                 continue;
887                         best_match = j;
888                         match_level = 2;
889                         /* FALL THROUGH */
890                 case 2:
891                         if (!unchanged_attrs(cmpbuf, file, sxp)) {
892                                 free_stat_x(sxp);
893                                 continue;
894                         }
895                         best_match = j;
896                         match_level = 3;
897                         break;
898                 }
899                 break;
900         } while (basis_dir[++j] != NULL);
901
902         if (!match_level)
903                 goto got_nothing_for_ya;
904
905         if (j != best_match) {
906                 j = best_match;
907                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
908                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
909                         goto got_nothing_for_ya;
910         }
911
912         if (match_level == 3 && !copy_dest) {
913                 if (find_exact_for_existing) {
914                         if (link_dest && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
915                                 return -1;
916                         if (do_unlink(fname) < 0 && errno != ENOENT)
917                                 goto got_nothing_for_ya;
918                 }
919 #ifdef SUPPORT_HARD_LINKS
920                 if (link_dest) {
921                         if (!hard_link_one(file, fname, cmpbuf, 1))
922                                 goto try_a_copy;
923                         if (preserve_hard_links && F_IS_HLINKED(file))
924                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
925                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
926                                 itemize(cmpbuf, file, ndx, 1, sxp,
927                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
928                                         0, "");
929                         }
930                 } else
931 #endif
932                 {
933                         if (itemizing)
934                                 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
935                 }
936                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
937                         rprintf(FCLIENT, "%s is uptodate\n", fname);
938                 return -2;
939         }
940
941         if (find_exact_for_existing)
942                 goto got_nothing_for_ya;
943
944         if (match_level >= 2) {
945 #ifdef SUPPORT_HARD_LINKS
946           try_a_copy: /* Copy the file locally. */
947 #endif
948                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
949                         if (find_exact_for_existing) /* Can get here via hard-link failure */
950                                 goto got_nothing_for_ya;
951                         return -1;
952                 }
953                 if (itemizing)
954                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
955                 if (maybe_ATTRS_REPORT
956                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
957                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
958                         code = match_level == 3 ? FCLIENT : FINFO;
959                         rprintf(code, "%s%s\n", fname,
960                                 match_level == 3 ? " is uptodate" : "");
961                 }
962 #ifdef SUPPORT_HARD_LINKS
963                 if (preserve_hard_links && F_IS_HLINKED(file))
964                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
965 #endif
966                 return -2;
967         }
968
969         return FNAMECMP_BASIS_DIR_LOW + j;
970
971 got_nothing_for_ya:
972         sxp->st = real_st;
973         return -1;
974 }
975
976 /* This is only called for non-regular files.  We return -2 if we've finished
977  * handling the file, or -1 if no dest-linking occurred, or a non-negative
978  * value if we found an alternate basis file. */
979 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
980                          char *cmpbuf, stat_x *sxp, int itemizing,
981                          enum logcode code)
982 {
983         int best_match = -1;
984         int match_level = 0;
985         enum nonregtype type;
986         uint32 *devp;
987 #ifdef SUPPORT_LINKS
988         char lnk[MAXPATHLEN];
989         int len;
990 #endif
991         int j = 0;
992
993 #ifndef SUPPORT_LINKS
994         if (S_ISLNK(file->mode))
995                 return -1;
996 #endif
997         if (S_ISDIR(file->mode)) {
998                 type = TYPE_DIR;
999         } else if (IS_SPECIAL(file->mode))
1000                 type = TYPE_SPECIAL;
1001         else if (IS_DEVICE(file->mode))
1002                 type = TYPE_DEVICE;
1003 #ifdef SUPPORT_LINKS
1004         else if (S_ISLNK(file->mode))
1005                 type = TYPE_SYMLINK;
1006 #endif
1007         else {
1008                 rprintf(FERROR,
1009                         "internal: try_dests_non() called with invalid mode (%o)\n",
1010                         (int)file->mode);
1011                 exit_cleanup(RERR_UNSUPPORTED);
1012         }
1013
1014         do {
1015                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1016                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1017                         continue;
1018                 switch (type) {
1019                 case TYPE_DIR:
1020                         if (!S_ISDIR(sxp->st.st_mode))
1021                                 continue;
1022                         break;
1023                 case TYPE_SPECIAL:
1024                         if (!IS_SPECIAL(sxp->st.st_mode))
1025                                 continue;
1026                         break;
1027                 case TYPE_DEVICE:
1028                         if (!IS_DEVICE(sxp->st.st_mode))
1029                                 continue;
1030                         break;
1031                 case TYPE_SYMLINK:
1032 #ifdef SUPPORT_LINKS
1033                         if (!S_ISLNK(sxp->st.st_mode))
1034                                 continue;
1035                         break;
1036 #else
1037                         return -1;
1038 #endif
1039                 }
1040                 if (match_level < 1) {
1041                         match_level = 1;
1042                         best_match = j;
1043                 }
1044                 switch (type) {
1045                 case TYPE_DIR:
1046                 case TYPE_SPECIAL:
1047                         break;
1048                 case TYPE_DEVICE:
1049                         devp = F_RDEV_P(file);
1050                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1051                                 continue;
1052                         break;
1053                 case TYPE_SYMLINK:
1054 #ifdef SUPPORT_LINKS
1055                         if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1056                                 continue;
1057                         lnk[len] = '\0';
1058                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1059                                 continue;
1060                         break;
1061 #else
1062                         return -1;
1063 #endif
1064                 }
1065                 if (match_level < 2) {
1066                         match_level = 2;
1067                         best_match = j;
1068                 }
1069                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1070                         match_level = 3;
1071                         best_match = j;
1072                         break;
1073                 }
1074         } while (basis_dir[++j] != NULL);
1075
1076         if (!match_level)
1077                 return -1;
1078
1079         if (j != best_match) {
1080                 j = best_match;
1081                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1082                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1083                         return -1;
1084         }
1085
1086         if (match_level == 3) {
1087 #ifdef SUPPORT_HARD_LINKS
1088                 if (link_dest
1089 #ifndef CAN_HARDLINK_SYMLINK
1090                  && !S_ISLNK(file->mode)
1091 #endif
1092 #ifndef CAN_HARDLINK_SPECIAL
1093                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1094 #endif
1095                  && !S_ISDIR(file->mode)) {
1096                         if (do_link(cmpbuf, fname) < 0) {
1097                                 rsyserr(FERROR_XFER, errno,
1098                                         "failed to hard-link %s with %s",
1099                                         cmpbuf, fname);
1100                                 return j;
1101                         }
1102                         if (preserve_hard_links && F_IS_HLINKED(file))
1103                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1104                 } else
1105 #endif
1106                         match_level = 2;
1107                 if (itemizing && stdout_format_has_i
1108                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1109                         int chg = compare_dest && type != TYPE_DIR ? 0
1110                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1111                         char *lp = match_level == 3 ? "" : NULL;
1112                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1113                 }
1114                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1115                         rprintf(FCLIENT, "%s%s is uptodate\n",
1116                                 fname, type == TYPE_DIR ? "/" : "");
1117                 }
1118                 return -2;
1119         }
1120
1121         return j;
1122 }
1123
1124 static void list_file_entry(struct file_struct *f)
1125 {
1126         char permbuf[PERMSTRING_SIZE];
1127         int64 len;
1128         int colwidth = human_readable ? 14 : 11;
1129
1130         if (!F_IS_ACTIVE(f)) {
1131                 /* this can happen if duplicate names were removed */
1132                 return;
1133         }
1134
1135         permstring(permbuf, f->mode);
1136         len = F_LENGTH(f);
1137
1138         /* TODO: indicate '+' if the entry has an ACL. */
1139
1140 #ifdef SUPPORT_LINKS
1141         if (preserve_links && S_ISLNK(f->mode)) {
1142                 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1143                         permbuf, colwidth, human_num(len),
1144                         timestring(f->modtime), f_name(f, NULL),
1145                         F_SYMLINK(f));
1146         } else
1147 #endif
1148         if (missing_args == 2 && f->mode == 0) {
1149                 rprintf(FINFO, "%-*s %s\n",
1150                         colwidth + 31, "*missing",
1151                         f_name(f, NULL));
1152         } else {
1153                 rprintf(FINFO, "%s %*s %s %s\n",
1154                         permbuf, colwidth, human_num(len),
1155                         timestring(f->modtime), f_name(f, NULL));
1156         }
1157 }
1158
1159 static int phase = 0;
1160 static int dflt_perms;
1161
1162 static int implied_dirs_are_missing;
1163 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1164 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1165 {
1166         return F_DEPTH(file) > F_DEPTH(subtree)
1167                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1168 }
1169
1170 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1171  * make sure it exists, and has the right permissions/timestamp info.  For
1172  * all other non-regular files (symlinks, etc.) we create them here.  For
1173  * regular files that have changed, we try to find a basis file and then
1174  * start sending checksums.  The ndx is the file's unique index value.
1175  *
1176  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1177  * passed to delete_item(), which can use it during a recursive delete.)
1178  *
1179  * Note that f_out is set to -1 when doing final directory-permission and
1180  * modification-time repair. */
1181 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1182                            int itemizing, enum logcode code, int f_out)
1183 {
1184         static const char *parent_dirname = "";
1185         static struct file_struct *prior_dir_file = NULL;
1186         /* Missing dir not created due to --dry-run; will still be scanned. */
1187         static struct file_struct *dry_missing_dir = NULL;
1188         /* Missing dir whose contents are skipped altogether due to
1189          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1190         static struct file_struct *skip_dir = NULL;
1191         static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1192         static int need_fuzzy_dirlist = 0;
1193         struct file_struct *fuzzy_file = NULL;
1194         int fd = -1, f_copy = -1;
1195         stat_x sx, real_sx;
1196         STRUCT_STAT partial_st;
1197         struct file_struct *back_file = NULL;
1198         int statret, real_ret, stat_errno;
1199         char *fnamecmp, *partialptr, *backupptr = NULL;
1200         char fnamecmpbuf[MAXPATHLEN];
1201         uchar fnamecmp_type;
1202         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1203         int is_dir = !S_ISDIR(file->mode) ? 0
1204                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1205                    : 1;
1206
1207         if (DEBUG_GTE(GENR, 1))
1208                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1209
1210         if (list_only) {
1211                 if (is_dir < 0
1212                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1213                         return;
1214                 list_file_entry(file);
1215                 return;
1216         }
1217
1218         maybe_ATTRS_SET_NANO = always_checksum ? ATTRS_SET_NANO : 0;
1219
1220         if (skip_dir) {
1221                 if (is_below(file, skip_dir)) {
1222                         if (is_dir)
1223                                 file->flags |= FLAG_MISSING_DIR;
1224 #ifdef SUPPORT_HARD_LINKS
1225                         else if (F_IS_HLINKED(file))
1226                                 handle_skipped_hlink(file, itemizing, code, f_out);
1227 #endif
1228                         return;
1229                 }
1230                 skip_dir = NULL;
1231         }
1232
1233         init_stat_x(&sx);
1234         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1235                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1236                         if (is_dir < 0)
1237                                 return;
1238 #ifdef SUPPORT_HARD_LINKS
1239                         if (F_IS_HLINKED(file))
1240                                 handle_skipped_hlink(file, itemizing, code, f_out);
1241 #endif
1242                         rprintf(FERROR_XFER,
1243                                 "ERROR: daemon refused to receive %s \"%s\"\n",
1244                                 is_dir ? "directory" : "file", fname);
1245                         if (is_dir)
1246                                 goto skipping_dir_contents;
1247                         return;
1248                 }
1249         }
1250
1251         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1252                 int i;
1253           parent_is_dry_missing:
1254                 for (i = 0; i < fuzzy_basis; i++) {
1255                         if (fuzzy_dirlist[i]) {
1256                                 flist_free(fuzzy_dirlist[i]);
1257                                 fuzzy_dirlist[i] = NULL;
1258                         }
1259                 }
1260                 parent_dirname = "";
1261                 statret = -1;
1262                 stat_errno = ENOENT;
1263         } else {
1264                 const char *dn = file->dirname ? file->dirname : ".";
1265                 dry_missing_dir = NULL;
1266                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1267                         /* Each parent dir must be in the file list or the flist data is bad.
1268                          * Optimization: most of the time the parent dir will be the last dir
1269                          * this function was asked to process in the file list. */
1270                         if (!inc_recurse
1271                          && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
1272                          && (!prior_dir_file || strcmp(dn, f_name(prior_dir_file, NULL)) != 0)
1273                          && flist_find_name(cur_flist, dn, 1) < 0) {
1274                                 rprintf(FERROR,
1275                                         "ABORTING due to invalid path from sender: %s/%s\n",
1276                                         dn, file->basename);
1277                                 exit_cleanup(RERR_PROTOCOL);
1278                         }
1279                         if (relative_paths && !implied_dirs
1280                          && do_stat(dn, &sx.st) < 0) {
1281                                 if (dry_run)
1282                                         goto parent_is_dry_missing;
1283                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1284                                         rsyserr(FERROR_XFER, errno,
1285                                                 "recv_generator: mkdir %s failed",
1286                                                 full_fname(dn));
1287                                 }
1288                         }
1289                         if (fuzzy_basis) {
1290                                 int i;
1291                                 for (i = 0; i < fuzzy_basis; i++) {
1292                                         if (fuzzy_dirlist[i]) {
1293                                                 flist_free(fuzzy_dirlist[i]);
1294                                                 fuzzy_dirlist[i] = NULL;
1295                                         }
1296                                 }
1297                                 need_fuzzy_dirlist = 1;
1298                         }
1299 #ifdef SUPPORT_ACLS
1300                         if (!preserve_perms)
1301                                 dflt_perms = default_perms_for_dir(dn);
1302 #endif
1303                 }
1304                 parent_dirname = dn;
1305
1306                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1307                         int i;
1308                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1309                         for (i = 0; i < fuzzy_basis; i++) {
1310                                 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1311                                         continue;
1312                                 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1313                                 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1314                                         flist_free(fuzzy_dirlist[i]);
1315                                         fuzzy_dirlist[i] = NULL;
1316                                 }
1317                         }
1318                         need_fuzzy_dirlist = 0;
1319                 }
1320
1321                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1322                 stat_errno = errno;
1323         }
1324
1325         if (missing_args == 2 && file->mode == 0) {
1326                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1327                         return;
1328                 if (statret == 0)
1329                         delete_item(fname, sx.st.st_mode, del_opts);
1330                 return;
1331         }
1332
1333         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1334                 if (is_dir) {
1335                         if (is_dir < 0)
1336                                 return;
1337                         skip_dir = file;
1338                         file->flags |= FLAG_MISSING_DIR;
1339                 }
1340 #ifdef SUPPORT_HARD_LINKS
1341                 else if (F_IS_HLINKED(file))
1342                         handle_skipped_hlink(file, itemizing, code, f_out);
1343 #endif
1344                 if (INFO_GTE(SKIP, 1)) {
1345                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1346                                 is_dir ? "directory" : "file", fname);
1347                 }
1348                 return;
1349         }
1350
1351         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1352          && !am_root && sx.st.st_uid == our_uid)
1353                 del_opts |= DEL_NO_UID_WRITE;
1354
1355         if (ignore_existing > 0 && statret == 0
1356          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1357                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1358                         rprintf(FINFO, "%s exists\n", fname);
1359 #ifdef SUPPORT_HARD_LINKS
1360                 if (F_IS_HLINKED(file))
1361                         handle_skipped_hlink(file, itemizing, code, f_out);
1362 #endif
1363                 goto cleanup;
1364         }
1365
1366         fnamecmp = fname;
1367
1368         if (is_dir) {
1369                 mode_t added_perms;
1370                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1371                         goto cleanup;
1372                 if (am_root < 0) {
1373                         /* For --fake-super, the dir must be useable by the copying
1374                          * user, just like it would be for root. */
1375                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1376                 } else
1377                         added_perms = 0;
1378                 if (is_dir < 0) {
1379                         if (!(preserve_times & PRESERVE_DIR_TIMES))
1380                                 return;
1381                         /* In inc_recurse mode we want to make sure any missing
1382                          * directories get created while we're still processing
1383                          * the parent dir (which allows us to touch the parent
1384                          * dir's mtime right away).  We will handle the dir in
1385                          * full later (right before we handle its contents). */
1386                         if (statret == 0
1387                          && (S_ISDIR(sx.st.st_mode)
1388                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1389                                 goto cleanup; /* Any errors get reported later. */
1390                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1391                                 file->flags |= FLAG_DIR_CREATED;
1392                         goto cleanup;
1393                 }
1394                 /* The file to be received is a directory, so we need
1395                  * to prepare appropriately.  If there is already a
1396                  * file of that name and it is *not* a directory, then
1397                  * we need to delete it.  If it doesn't exist, then
1398                  * (perhaps recursively) create it. */
1399                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1400                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1401                                 goto skipping_dir_contents;
1402                         statret = -1;
1403                 }
1404                 if (dry_run && statret != 0) {
1405                         if (!dry_missing_dir)
1406                                 dry_missing_dir = file;
1407                         file->flags |= FLAG_MISSING_DIR;
1408                 }
1409                 init_stat_x(&real_sx);
1410                 real_sx.st = sx.st;
1411                 real_ret = statret;
1412                 if (file->flags & FLAG_DIR_CREATED)
1413                         statret = -1;
1414                 if (!preserve_perms) { /* See comment in non-dir code below. */
1415                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1416                                                dflt_perms, statret == 0);
1417                 }
1418                 if (statret != 0 && basis_dir[0] != NULL) {
1419                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1420                                               itemizing, code);
1421                         if (j == -2) {
1422                                 itemizing = 0;
1423                                 code = FNONE;
1424                                 statret = 1;
1425                         } else if (j >= 0) {
1426                                 statret = 1;
1427                                 fnamecmp = fnamecmpbuf;
1428                         }
1429                 }
1430                 if (itemizing && f_out != -1) {
1431                         itemize(fnamecmp, file, ndx, statret, &sx,
1432                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1433                 }
1434                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1435                         if (!relative_paths || errno != ENOENT
1436                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1437                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1438                                 rsyserr(FERROR_XFER, errno,
1439                                         "recv_generator: mkdir %s failed",
1440                                         full_fname(fname));
1441                           skipping_dir_contents:
1442                                 rprintf(FERROR,
1443                                     "*** Skipping any contents from this failed directory ***\n");
1444                                 skip_dir = file;
1445                                 file->flags |= FLAG_MISSING_DIR;
1446                                 goto cleanup;
1447                         }
1448                 }
1449
1450 #ifdef SUPPORT_XATTRS
1451                 if (preserve_xattrs && statret == 1)
1452                         copy_xattrs(fnamecmpbuf, fname);
1453 #endif
1454                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1455                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1456                         rprintf(code, "%s/\n", fname);
1457
1458                 /* We need to ensure that the dirs in the transfer have both
1459                  * readable and writable permissions during the time we are
1460                  * putting files within them.  This is then restored to the
1461                  * former permissions after the transfer is done. */
1462 #ifdef HAVE_CHMOD
1463                 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1464                         mode_t mode = file->mode | S_IRWXU;
1465                         if (do_chmod(fname, mode) < 0) {
1466                                 rsyserr(FERROR_XFER, errno,
1467                                         "failed to modify permissions on %s",
1468                                         full_fname(fname));
1469                         }
1470                         need_retouch_dir_perms = 1;
1471                 }
1472 #endif
1473
1474                 if (real_ret != 0 && one_file_system)
1475                         real_sx.st.st_dev = filesystem_dev;
1476                 if (inc_recurse) {
1477                         if (one_file_system) {
1478                                 uint32 *devp = F_DIR_DEV_P(file);
1479                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1480                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1481                         }
1482                 }
1483                 else if (delete_during && f_out != -1 && !phase
1484                     && !(file->flags & FLAG_MISSING_DIR)) {
1485                         if (file->flags & FLAG_CONTENT_DIR)
1486                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1487                         else
1488                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1489                 }
1490                 prior_dir_file = file;
1491                 goto cleanup;
1492         }
1493
1494         /* If we're not preserving permissions, change the file-list's
1495          * mode based on the local permissions and some heuristics. */
1496         if (!preserve_perms) {
1497                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1498                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1499                                        exists);
1500         }
1501
1502 #ifdef SUPPORT_HARD_LINKS
1503         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1504          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1505                 goto cleanup;
1506 #endif
1507
1508         if (preserve_links && S_ISLNK(file->mode)) {
1509 #ifdef SUPPORT_LINKS
1510                 const char *sl = F_SYMLINK(file);
1511                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1512                         if (INFO_GTE(NAME, 1)) {
1513                                 if (solo_file) {
1514                                         /* fname contains the destination path, but we
1515                                          * want to report the source path. */
1516                                         fname = f_name(file, NULL);
1517                                 }
1518                                 rprintf(FINFO,
1519                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1520                                         fname, sl);
1521                         }
1522                         return;
1523                 }
1524                 if (statret == 0) {
1525                         char lnk[MAXPATHLEN];
1526                         int len;
1527
1528                         if (S_ISLNK(sx.st.st_mode)
1529                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1530                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1531                                 /* The link is pointing to the right place. */
1532                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1533                                 if (itemizing)
1534                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1535 #ifdef SUPPORT_HARD_LINKS
1536                                 if (preserve_hard_links && F_IS_HLINKED(file))
1537                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1538 #endif
1539                                 if (remove_source_files == 1)
1540                                         goto return_with_success;
1541                                 goto cleanup;
1542                         }
1543                 } else if (basis_dir[0] != NULL) {
1544                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1545                                               itemizing, code);
1546                         if (j == -2) {
1547 #ifndef CAN_HARDLINK_SYMLINK
1548                                 if (link_dest) {
1549                                         /* Resort to --copy-dest behavior. */
1550                                 } else
1551 #endif
1552                                 if (!copy_dest)
1553                                         goto cleanup;
1554                                 itemizing = 0;
1555                                 code = FNONE;
1556                         } else if (j >= 0) {
1557                                 statret = 1;
1558                                 fnamecmp = fnamecmpbuf;
1559                         }
1560                 }
1561                 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1562                         set_file_attrs(fname, file, NULL, NULL, 0);
1563                         if (itemizing) {
1564                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1565                                         statret = -1;
1566                                 itemize(fnamecmp, file, ndx, statret, &sx,
1567                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1568                         }
1569                         if (code != FNONE && INFO_GTE(NAME, 1))
1570                                 rprintf(code, "%s -> %s\n", fname, sl);
1571 #ifdef SUPPORT_HARD_LINKS
1572                         if (preserve_hard_links && F_IS_HLINKED(file))
1573                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1574 #endif
1575                         /* This does not check remove_source_files == 1
1576                          * because this is one of the items that the old
1577                          * --remove-sent-files option would remove. */
1578                         if (remove_source_files)
1579                                 goto return_with_success;
1580                 }
1581 #endif
1582                 goto cleanup;
1583         }
1584
1585         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1586          || (preserve_specials && IS_SPECIAL(file->mode))) {
1587                 dev_t rdev;
1588                 int del_for_flag = 0;
1589                 if (IS_DEVICE(file->mode)) {
1590                         uint32 *devp = F_RDEV_P(file);
1591                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1592                 } else
1593                         rdev = 0;
1594                 if (statret == 0) {
1595                         if (IS_DEVICE(file->mode)) {
1596                                 if (!IS_DEVICE(sx.st.st_mode))
1597                                         statret = -1;
1598                                 del_for_flag = DEL_FOR_DEVICE;
1599                         } else {
1600                                 if (!IS_SPECIAL(sx.st.st_mode))
1601                                         statret = -1;
1602                                 del_for_flag = DEL_FOR_SPECIAL;
1603                         }
1604                         if (statret == 0
1605                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1606                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1607                                 /* The device or special file is identical. */
1608                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1609                                 if (itemizing)
1610                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1611 #ifdef SUPPORT_HARD_LINKS
1612                                 if (preserve_hard_links && F_IS_HLINKED(file))
1613                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1614 #endif
1615                                 if (remove_source_files == 1)
1616                                         goto return_with_success;
1617                                 goto cleanup;
1618                         }
1619                 } else if (basis_dir[0] != NULL) {
1620                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1621                                               itemizing, code);
1622                         if (j == -2) {
1623 #ifndef CAN_HARDLINK_SPECIAL
1624                                 if (link_dest) {
1625                                         /* Resort to --copy-dest behavior. */
1626                                 } else
1627 #endif
1628                                 if (!copy_dest)
1629                                         goto cleanup;
1630                                 itemizing = 0;
1631                                 code = FNONE;
1632                         } else if (j >= 0) {
1633                                 statret = 1;
1634                                 fnamecmp = fnamecmpbuf;
1635                         }
1636                 }
1637                 if (DEBUG_GTE(GENR, 1)) {
1638                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1639                                 fname, (int)file->mode,
1640                                 (long)major(rdev), (long)minor(rdev));
1641                 }
1642                 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1643                         set_file_attrs(fname, file, NULL, NULL, 0);
1644                         if (itemizing) {
1645                                 itemize(fnamecmp, file, ndx, statret, &sx,
1646                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1647                         }
1648                         if (code != FNONE && INFO_GTE(NAME, 1))
1649                                 rprintf(code, "%s\n", fname);
1650 #ifdef SUPPORT_HARD_LINKS
1651                         if (preserve_hard_links && F_IS_HLINKED(file))
1652                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1653 #endif
1654                         if (remove_source_files == 1)
1655                                 goto return_with_success;
1656                 }
1657                 goto cleanup;
1658         }
1659
1660         if (!S_ISREG(file->mode)) {
1661                 if (solo_file)
1662                         fname = f_name(file, NULL);
1663                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1664                 goto cleanup;
1665         }
1666
1667         if (max_size >= 0 && F_LENGTH(file) > max_size) {
1668                 if (INFO_GTE(SKIP, 1)) {
1669                         if (solo_file)
1670                                 fname = f_name(file, NULL);
1671                         rprintf(FINFO, "%s is over max-size\n", fname);
1672                 }
1673                 goto cleanup;
1674         }
1675         if (min_size >= 0 && F_LENGTH(file) < min_size) {
1676                 if (INFO_GTE(SKIP, 1)) {
1677                         if (solo_file)
1678                                 fname = f_name(file, NULL);
1679                         rprintf(FINFO, "%s is under min-size\n", fname);
1680                 }
1681                 goto cleanup;
1682         }
1683
1684         if (update_only > 0 && statret == 0 && time_diff(&sx.st, file) > 0) {
1685                 if (INFO_GTE(SKIP, 1))
1686                         rprintf(FINFO, "%s is newer\n", fname);
1687 #ifdef SUPPORT_HARD_LINKS
1688                 if (F_IS_HLINKED(file))
1689                         handle_skipped_hlink(file, itemizing, code, f_out);
1690 #endif
1691                 goto cleanup;
1692         }
1693
1694         fnamecmp_type = FNAMECMP_FNAME;
1695
1696         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1697                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1698                         goto cleanup;
1699                 statret = -1;
1700                 stat_errno = ENOENT;
1701         }
1702
1703         if (basis_dir[0] != NULL && (statret != 0 || !copy_dest)) {
1704                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1705                                       statret == 0, itemizing, code);
1706                 if (j == -2) {
1707                         if (remove_source_files == 1)
1708                                 goto return_with_success;
1709                         goto cleanup;
1710                 }
1711                 if (j >= 0) {
1712                         fnamecmp = fnamecmpbuf;
1713                         fnamecmp_type = j;
1714                         statret = 0;
1715                 }
1716         }
1717
1718         init_stat_x(&real_sx);
1719         real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1720         real_ret = statret;
1721
1722         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1723             && link_stat(partialptr, &partial_st, 0) == 0
1724             && S_ISREG(partial_st.st_mode)) {
1725                 if (statret != 0)
1726                         goto prepare_to_open;
1727         } else
1728                 partialptr = NULL;
1729
1730         if (statret != 0 && fuzzy_basis) {
1731                 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1732                 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1733                 if (fuzzy_file) {
1734                         f_name(fuzzy_file, fnamecmpbuf);
1735                         if (DEBUG_GTE(FUZZY, 1)) {
1736                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1737                                         fname, fnamecmpbuf);
1738                         }
1739                         sx.st.st_size = F_LENGTH(fuzzy_file);
1740                         statret = 0;
1741                         fnamecmp = fnamecmpbuf;
1742                 }
1743         }
1744
1745         if (statret != 0) {
1746 #ifdef SUPPORT_HARD_LINKS
1747                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1748                         cur_flist->in_progress++;
1749                         goto cleanup;
1750                 }
1751 #endif
1752                 if (stat_errno == ENOENT)
1753                         goto notify_others;
1754                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1755                         full_fname(fname));
1756                 goto cleanup;
1757         }
1758
1759         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1760                 ;
1761         else if (fnamecmp_type >= FNAMECMP_FUZZY)
1762                 ;
1763         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1764                 if (partialptr) {
1765                         do_unlink(partialptr);
1766                         handle_partial_dir(partialptr, PDIR_DELETE);
1767                 }
1768                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT | maybe_ATTRS_SET_NANO);
1769                 if (itemizing)
1770                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1771 #ifdef SUPPORT_HARD_LINKS
1772                 if (preserve_hard_links && F_IS_HLINKED(file))
1773                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1774 #endif
1775                 if (remove_source_files != 1)
1776                         goto cleanup;
1777           return_with_success:
1778                 if (!dry_run)
1779                         send_msg_int(MSG_SUCCESS, ndx);
1780                 goto cleanup;
1781         }
1782
1783         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1784 #ifdef SUPPORT_HARD_LINKS
1785                 if (F_IS_HLINKED(file))
1786                         handle_skipped_hlink(file, itemizing, code, f_out);
1787 #endif
1788                 goto cleanup;
1789         }
1790
1791   prepare_to_open:
1792         if (partialptr) {
1793                 sx.st = partial_st;
1794                 fnamecmp = partialptr;
1795                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1796                 statret = 0;
1797         }
1798
1799         if (!do_xfers)
1800                 goto notify_others;
1801
1802         if (read_batch || whole_file) {
1803                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1804                         if (!(backupptr = get_backup_name(fname)))
1805                                 goto cleanup;
1806                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1807                                 goto pretend_missing;
1808                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1809                                 unmake_file(back_file);
1810                                 back_file = NULL;
1811                                 goto cleanup;
1812                         }
1813                 }
1814                 goto notify_others;
1815         }
1816
1817         if (fuzzy_dirlist[0]) {
1818                 int j = flist_find(fuzzy_dirlist[0], file);
1819                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1820                         fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1821         }
1822
1823         /* open the file */
1824         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1825                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1826                         full_fname(fnamecmp));
1827           pretend_missing:
1828                 /* pretend the file didn't exist */
1829 #ifdef SUPPORT_HARD_LINKS
1830                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1831                         cur_flist->in_progress++;
1832                         goto cleanup;
1833                 }
1834 #endif
1835                 statret = real_ret = -1;
1836                 goto notify_others;
1837         }
1838
1839         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1840                 if (!(backupptr = get_backup_name(fname))) {
1841                         close(fd);
1842                         goto cleanup;
1843                 }
1844                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1845                         close(fd);
1846                         goto pretend_missing;
1847                 }
1848                 if (robust_unlink(backupptr) && errno != ENOENT) {
1849                         rsyserr(FERROR_XFER, errno, "unlink %s",
1850                                 full_fname(backupptr));
1851                         unmake_file(back_file);
1852                         back_file = NULL;
1853                         close(fd);
1854                         goto cleanup;
1855                 }
1856                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1857                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1858                         unmake_file(back_file);
1859                         back_file = NULL;
1860                         close(fd);
1861                         goto cleanup;
1862                 }
1863                 fnamecmp_type = FNAMECMP_BACKUP;
1864         }
1865
1866         if (DEBUG_GTE(DELTASUM, 3)) {
1867                 rprintf(FINFO, "gen mapped %s of size %s\n",
1868                         fnamecmp, big_num(sx.st.st_size));
1869         }
1870
1871         if (DEBUG_GTE(DELTASUM, 2))
1872                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1873
1874   notify_others:
1875         if (remove_source_files && !delay_updates && !phase && !dry_run)
1876                 increment_active_files(ndx, itemizing, code);
1877         if (inc_recurse && (!dry_run || write_batch < 0))
1878                 cur_flist->in_progress++;
1879 #ifdef SUPPORT_HARD_LINKS
1880         if (preserve_hard_links && F_IS_HLINKED(file))
1881                 file->flags |= FLAG_FILE_SENT;
1882 #endif
1883         write_ndx(f_out, ndx);
1884         if (itemizing) {
1885                 int iflags = ITEM_TRANSFER;
1886                 if (always_checksum > 0)
1887                         iflags |= ITEM_REPORT_CHANGE;
1888                 if (fnamecmp_type != FNAMECMP_FNAME)
1889                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1890                 if (fnamecmp_type >= FNAMECMP_FUZZY)
1891                         iflags |= ITEM_XNAME_FOLLOWS;
1892                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1893                         fuzzy_file ? fuzzy_file->basename : NULL);
1894                 free_stat_x(&real_sx);
1895         }
1896
1897         if (!do_xfers) {
1898 #ifdef SUPPORT_HARD_LINKS
1899                 if (preserve_hard_links && F_IS_HLINKED(file))
1900                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1901 #endif
1902                 goto cleanup;
1903         }
1904         if (read_batch)
1905                 goto cleanup;
1906
1907         if (statret != 0 || whole_file)
1908                 write_sum_head(f_out, NULL);
1909         else if (sx.st.st_size <= 0) {
1910                 write_sum_head(f_out, NULL);
1911                 close(fd);
1912         } else {
1913                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1914                         rprintf(FWARNING,
1915                             "WARNING: file is too large for checksum sending: %s\n",
1916                             fnamecmp);
1917                         write_sum_head(f_out, NULL);
1918                 }
1919                 close(fd);
1920         }
1921
1922   cleanup:
1923         if (back_file) {
1924                 int save_preserve_xattrs = preserve_xattrs;
1925                 if (f_copy >= 0)
1926                         close(f_copy);
1927 #ifdef SUPPORT_XATTRS
1928                 if (preserve_xattrs) {
1929                         copy_xattrs(fname, backupptr);
1930                         preserve_xattrs = 0;
1931                 }
1932 #endif
1933                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1934                 preserve_xattrs = save_preserve_xattrs;
1935                 if (INFO_GTE(BACKUP, 1)) {
1936                         rprintf(FINFO, "backed up %s to %s\n",
1937                                 fname, backupptr);
1938                 }
1939                 unmake_file(back_file);
1940         }
1941
1942         free_stat_x(&sx);
1943 }
1944
1945 /* If we are replacing an existing hard link, symlink, device, or special file,
1946  * create a temp-name item and rename it into place.  A symlimk specifies slnk,
1947  * a hard link specifies hlnk, otherwise we create a device based on rdev.
1948  * Specify 0 for the del_for_flag if there is not a file to replace.  This
1949  * returns 1 on success and 0 on failure. */
1950 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1951                   dev_t rdev, stat_x *sxp, int del_for_flag)
1952 {
1953         char tmpname[MAXPATHLEN];
1954         const char *create_name;
1955         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1956
1957         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1958                 skip_atomic = 1;
1959         else
1960                 skip_atomic = 0;
1961
1962         if (del_for_flag) {
1963                 if (make_backups > 0 && !dir_in_the_way) {
1964                         if (!make_backup(fname, skip_atomic))
1965                                 return 0;
1966                 } else if (skip_atomic) {
1967                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1968                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1969                                 return 0;
1970                 }
1971         }
1972
1973         create_name = skip_atomic ? fname : tmpname;
1974
1975         if (slnk) {
1976 #ifdef SUPPORT_LINKS
1977                 if (do_symlink(slnk, create_name) < 0) {
1978                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1979                                 full_fname(create_name), slnk);
1980                         return 0;
1981                 }
1982 #else
1983                 return 0;
1984 #endif
1985         } else if (hlnk) {
1986 #ifdef SUPPORT_HARD_LINKS
1987                 if (!hard_link_one(file, create_name, hlnk, 0))
1988                         return 0;
1989 #else
1990                 return 0;
1991 #endif
1992         } else {
1993                 if (do_mknod(create_name, file->mode, rdev) < 0) {
1994                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1995                                 full_fname(create_name));
1996                         return 0;
1997                 }
1998         }
1999
2000         if (!skip_atomic) {
2001                 if (do_rename(tmpname, fname) < 0) {
2002                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
2003                                 full_fname(tmpname), full_fname(fname));
2004                         do_unlink(tmpname);
2005                         return 0;
2006                 }
2007         }
2008
2009         return 1;
2010 }
2011
2012 #ifdef SUPPORT_HARD_LINKS
2013 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2014                                  enum logcode code, int f_out)
2015 {
2016         char fbuf[MAXPATHLEN];
2017         int new_last_ndx;
2018         struct file_list *save_flist = cur_flist;
2019
2020         /* If we skip the last item in a chain of links and there was a
2021          * prior non-skipped hard-link waiting to finish, finish it now. */
2022         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2023                 return;
2024
2025         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2026         cur_flist->in_progress--; /* undo prior increment */
2027         f_name(file, fbuf);
2028         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2029
2030         cur_flist = save_flist;
2031 }
2032 #endif
2033
2034 static void touch_up_dirs(struct file_list *flist, int ndx)
2035 {
2036         static int counter = 0;
2037         struct file_struct *file;
2038         char *fname;
2039         BOOL fix_dir_perms;
2040         int i, start, end;
2041
2042         if (ndx < 0) {
2043                 start = 0;
2044                 end = flist->used - 1;
2045         } else
2046                 start = end = ndx;
2047
2048         /* Fix any directory permissions that were modified during the
2049          * transfer and/or re-set any tweaked modified-time values. */
2050         for (i = start; i <= end; i++, counter++) {
2051                 file = flist->files[i];
2052                 if (!F_IS_ACTIVE(file))
2053                         continue;
2054                 if (!S_ISDIR(file->mode)
2055                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2056                         continue;
2057                 if (DEBUG_GTE(TIME, 2)) {
2058                         fname = f_name(file, NULL);
2059                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2060                                 NS(fname), i);
2061                 }
2062                 /* Be sure not to retouch permissions with --fake-super. */
2063                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2064                 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2065                         continue;
2066                 fname = f_name(file, NULL);
2067                 if (fix_dir_perms)
2068                         do_chmod(fname, file->mode);
2069                 if (need_retouch_dir_times) {
2070                         STRUCT_STAT st;
2071                         if (link_stat(fname, &st, 0) == 0 && time_diff(&st, file))
2072                                 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
2073                 }
2074                 if (counter >= loopchk_limit) {
2075                         if (allowed_lull)
2076                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2077                         else
2078                                 maybe_flush_socket(0);
2079                         counter = 0;
2080                 }
2081         }
2082 }
2083
2084 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2085 {
2086         struct file_struct *file;
2087         struct file_list *flist;
2088         char fbuf[MAXPATHLEN];
2089         int ndx;
2090
2091         while (1) {
2092 #ifdef SUPPORT_HARD_LINKS
2093                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2094                         int send_failed = (ndx == -2);
2095                         if (send_failed)
2096                                 ndx = get_hlink_num();
2097                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2098                         file = flist->files[ndx - flist->ndx_start];
2099                         assert(file->flags & FLAG_HLINKED);
2100                         if (send_failed)
2101                                 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2102                         else
2103                                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2104                         flist->in_progress--;
2105                         continue;
2106                 }
2107 #endif
2108
2109                 if (check_redo && (ndx = get_redo_num()) != -1) {
2110                         OFF_T save_max_size = max_size;
2111                         OFF_T save_min_size = min_size;
2112                         csum_length = SUM_LENGTH;
2113                         max_size = -1;
2114                         min_size = -1;
2115                         ignore_existing = -ignore_existing;
2116                         ignore_non_existing = -ignore_non_existing;
2117                         update_only = -update_only;
2118                         always_checksum = -always_checksum;
2119                         size_only = -size_only;
2120                         append_mode = -append_mode;
2121                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2122                         ignore_times++;
2123
2124                         flist = cur_flist;
2125                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2126
2127                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2128                         if (solo_file)
2129                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2130                         else
2131                                 f_name(file, fbuf);
2132                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2133                         cur_flist->to_redo--;
2134
2135                         cur_flist = flist;
2136
2137                         csum_length = SHORT_SUM_LENGTH;
2138                         max_size = save_max_size;
2139                         min_size = save_min_size;
2140                         ignore_existing = -ignore_existing;
2141                         ignore_non_existing = -ignore_non_existing;
2142                         update_only = -update_only;
2143                         always_checksum = -always_checksum;
2144                         size_only = -size_only;
2145                         append_mode = -append_mode;
2146                         make_backups = -make_backups;
2147                         ignore_times--;
2148                         continue;
2149                 }
2150
2151                 if (cur_flist == first_flist)
2152                         break;
2153
2154                 /* We only get here if inc_recurse is enabled. */
2155                 if (first_flist->in_progress || first_flist->to_redo)
2156                         break;
2157
2158                 write_ndx(sock_f_out, NDX_DONE);
2159                 if (!read_batch && !flist_eof) {
2160                         int old_total = 0;
2161                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2162                                 old_total += flist->used;
2163                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2164                 }
2165
2166                 if (delete_during == 2 || !dir_tweaking) {
2167                         /* Skip directory touch-up. */
2168                 } else if (first_flist->parent_ndx >= 0)
2169                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2170
2171                 flist_free(first_flist); /* updates first_flist */
2172         }
2173 }
2174
2175 void generate_files(int f_out, const char *local_name)
2176 {
2177         int i, ndx, next_loopchk = 0;
2178         char fbuf[MAXPATHLEN];
2179         int itemizing;
2180         enum logcode code;
2181         int save_info_flist = info_levels[INFO_FLIST];
2182         int save_info_progress = info_levels[INFO_PROGRESS];
2183
2184         if (protocol_version >= 29) {
2185                 itemizing = 1;
2186                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2187                 code = logfile_format_has_i ? FNONE : FLOG;
2188         } else if (am_daemon) {
2189                 itemizing = logfile_format_has_i && do_xfers;
2190                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2191                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2192         } else if (!am_server) {
2193                 itemizing = stdout_format_has_i;
2194                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2195                 code = itemizing ? FNONE : FINFO;
2196         } else {
2197                 itemizing = 0;
2198                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2199                 code = FINFO;
2200         }
2201         solo_file = local_name;
2202         dir_tweaking = !(list_only || solo_file || dry_run);
2203         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2204         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2205         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2206             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2207         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2208
2209         if (DEBUG_GTE(GENR, 1))
2210                 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2211
2212         if (delete_before && !solo_file && cur_flist->used > 0)
2213                 do_delete_pass();
2214         if (delete_during == 2) {
2215                 deldelay_size = BIGPATHBUFLEN * 4;
2216                 deldelay_buf = new_array(char, deldelay_size);
2217                 if (!deldelay_buf)
2218                         out_of_memory("delete-delay");
2219         }
2220         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2221
2222         if (append_mode > 0 || whole_file < 0)
2223                 whole_file = 0;
2224         if (DEBUG_GTE(FLIST, 1)) {
2225                 rprintf(FINFO, "delta-transmission %s\n",
2226                         whole_file
2227                         ? "disabled for local transfer or --whole-file"
2228                         : "enabled");
2229         }
2230
2231         dflt_perms = (ACCESSPERMS & ~orig_umask);
2232
2233         do {
2234 #ifdef SUPPORT_HARD_LINKS
2235                 if (preserve_hard_links && inc_recurse) {
2236                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2237                                 wait_for_receiver();
2238                 }
2239 #endif
2240
2241                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2242                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2243                         if (solo_file)
2244                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2245                         else
2246                                 f_name(fp, fbuf);
2247                         ndx = cur_flist->ndx_start - 1;
2248                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2249                         if (delete_during && dry_run < 2 && !list_only
2250                          && !(fp->flags & FLAG_MISSING_DIR)) {
2251                                 if (fp->flags & FLAG_CONTENT_DIR) {
2252                                         dev_t dirdev;
2253                                         if (one_file_system) {
2254                                                 uint32 *devp = F_DIR_DEV_P(fp);
2255                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2256                                         } else
2257                                                 dirdev = MAKEDEV(0, 0);
2258                                         delete_in_dir(fbuf, fp, &dirdev);
2259                                 } else
2260                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2261                         }
2262                 }
2263                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2264                         struct file_struct *file = cur_flist->sorted[i];
2265
2266                         if (!F_IS_ACTIVE(file))
2267                                 continue;
2268
2269                         if (unsort_ndx)
2270                                 ndx = F_NDX(file);
2271                         else
2272                                 ndx = i + cur_flist->ndx_start;
2273
2274                         if (solo_file)
2275                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2276                         else
2277                                 f_name(file, fbuf);
2278                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2279
2280                         check_for_finished_files(itemizing, code, 0);
2281
2282                         if (i + cur_flist->ndx_start >= next_loopchk) {
2283                                 if (allowed_lull)
2284                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2285                                 else
2286                                         maybe_flush_socket(0);
2287                                 next_loopchk += loopchk_limit;
2288                         }
2289                 }
2290
2291                 if (!inc_recurse) {
2292                         write_ndx(f_out, NDX_DONE);
2293                         break;
2294                 }
2295
2296                 while (1) {
2297                         check_for_finished_files(itemizing, code, 1);
2298                         if (cur_flist->next || flist_eof)
2299                                 break;
2300                         wait_for_receiver();
2301                 }
2302         } while ((cur_flist = cur_flist->next) != NULL);
2303
2304         if (delete_during)
2305                 delete_in_dir(NULL, NULL, &dev_zero);
2306         phase++;
2307         if (DEBUG_GTE(GENR, 1))
2308                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2309
2310         while (1) {
2311                 check_for_finished_files(itemizing, code, 1);
2312                 if (msgdone_cnt)
2313                         break;
2314                 wait_for_receiver();
2315         }
2316
2317         phase++;
2318         if (DEBUG_GTE(GENR, 1))
2319                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2320
2321         write_ndx(f_out, NDX_DONE);
2322
2323         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2324         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2325                 write_ndx(f_out, NDX_DONE);
2326
2327         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2328                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2329                         write_del_stats(f_out);
2330                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2331                         write_ndx(f_out, NDX_DONE);
2332         }
2333
2334         /* Read MSG_DONE for the redo phase (and any prior messages). */
2335         while (1) {
2336                 check_for_finished_files(itemizing, code, 0);
2337                 if (msgdone_cnt > 1)
2338                         break;
2339                 wait_for_receiver();
2340         }
2341
2342         if (protocol_version >= 29) {
2343                 phase++;
2344                 if (DEBUG_GTE(GENR, 1))
2345                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2346                 if (!EARLY_DELAY_DONE_MSG()) {
2347                         write_ndx(f_out, NDX_DONE);
2348                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2349                                 write_ndx(f_out, NDX_DONE);
2350                 }
2351                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2352                 while (msgdone_cnt == 2)
2353                         wait_for_receiver();
2354         }
2355
2356         info_levels[INFO_FLIST] = save_info_flist;
2357         info_levels[INFO_PROGRESS] = save_info_progress;
2358
2359         if (delete_during == 2)
2360                 do_delayed_deletions(fbuf);
2361         if (delete_after && !solo_file && file_total > 0)
2362                 do_delete_pass();
2363
2364         if (max_delete >= 0 && skipped_deletes) {
2365                 rprintf(FWARNING,
2366                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2367                         skipped_deletes);
2368                 io_error |= IOERR_DEL_LIMIT;
2369         }
2370
2371         if (protocol_version >= 31) {
2372                 if (!EARLY_DELETE_DONE_MSG()) {
2373                         if (INFO_GTE(STATS, 2) || read_batch)
2374                                 write_del_stats(f_out);
2375                         write_ndx(f_out, NDX_DONE);
2376                 }
2377
2378                 /* Read MSG_DONE for late-delete phase & prior messages. */
2379                 while (msgdone_cnt == 3)
2380                         wait_for_receiver();
2381         }
2382
2383         if ((need_retouch_dir_perms || need_retouch_dir_times)
2384          && dir_tweaking && (!inc_recurse || delete_during == 2))
2385                 touch_up_dirs(dir_flist, -1);
2386
2387         if (DEBUG_GTE(GENR, 1))
2388                 rprintf(FINFO, "generate_files finished\n");
2389 }