Try to fix the iconv crash in bug 11338.
[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) 2003-2019 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                 if (match_level == 0) {
880                         best_match = j;
881                         match_level = 1;
882                 }
883                 if (!unchanged_file(cmpbuf, file, &sxp->st))
884                         continue;
885                 if (match_level == 1) {
886                         best_match = j;
887                         match_level = 2;
888                 }
889                 if (unchanged_attrs(cmpbuf, file, sxp)) {
890                         best_match = j;
891                         match_level = 3;
892                         break;
893                 }
894                 free_stat_x(sxp);
895         } while (basis_dir[++j] != NULL);
896
897         if (!match_level)
898                 goto got_nothing_for_ya;
899
900         if (j != best_match) {
901                 j = best_match;
902                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
903                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
904                         goto got_nothing_for_ya;
905         }
906
907         if (match_level == 3 && !copy_dest) {
908                 if (find_exact_for_existing) {
909                         if (link_dest && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
910                                 return -1;
911                         if (do_unlink(fname) < 0 && errno != ENOENT)
912                                 goto got_nothing_for_ya;
913                 }
914 #ifdef SUPPORT_HARD_LINKS
915                 if (link_dest) {
916                         if (!hard_link_one(file, fname, cmpbuf, 1))
917                                 goto try_a_copy;
918                         if (preserve_hard_links && F_IS_HLINKED(file))
919                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
920                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
921                                 itemize(cmpbuf, file, ndx, 1, sxp,
922                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
923                                         0, "");
924                         }
925                 } else
926 #endif
927                 {
928                         if (itemizing)
929                                 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
930                 }
931                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
932                         rprintf(FCLIENT, "%s is uptodate\n", fname);
933                 return -2;
934         }
935
936         if (find_exact_for_existing)
937                 goto got_nothing_for_ya;
938
939         if (match_level >= 2) {
940 #ifdef SUPPORT_HARD_LINKS
941           try_a_copy: /* Copy the file locally. */
942 #endif
943                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
944                         if (find_exact_for_existing) /* Can get here via hard-link failure */
945                                 goto got_nothing_for_ya;
946                         return -1;
947                 }
948                 if (itemizing)
949                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
950                 if (maybe_ATTRS_REPORT
951                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
952                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
953                         code = match_level == 3 ? FCLIENT : FINFO;
954                         rprintf(code, "%s%s\n", fname,
955                                 match_level == 3 ? " is uptodate" : "");
956                 }
957 #ifdef SUPPORT_HARD_LINKS
958                 if (preserve_hard_links && F_IS_HLINKED(file))
959                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
960 #endif
961                 return -2;
962         }
963
964         return FNAMECMP_BASIS_DIR_LOW + j;
965
966 got_nothing_for_ya:
967         sxp->st = real_st;
968         return -1;
969 }
970
971 /* This is only called for non-regular files.  We return -2 if we've finished
972  * handling the file, or -1 if no dest-linking occurred, or a non-negative
973  * value if we found an alternate basis file. */
974 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
975                          char *cmpbuf, stat_x *sxp, int itemizing,
976                          enum logcode code)
977 {
978         int best_match = -1;
979         int match_level = 0;
980         enum nonregtype type;
981         uint32 *devp;
982 #ifdef SUPPORT_LINKS
983         char lnk[MAXPATHLEN];
984         int len;
985 #endif
986         int j = 0;
987
988 #ifndef SUPPORT_LINKS
989         if (S_ISLNK(file->mode))
990                 return -1;
991 #endif
992         if (S_ISDIR(file->mode)) {
993                 type = TYPE_DIR;
994         } else if (IS_SPECIAL(file->mode))
995                 type = TYPE_SPECIAL;
996         else if (IS_DEVICE(file->mode))
997                 type = TYPE_DEVICE;
998 #ifdef SUPPORT_LINKS
999         else if (S_ISLNK(file->mode))
1000                 type = TYPE_SYMLINK;
1001 #endif
1002         else {
1003                 rprintf(FERROR,
1004                         "internal: try_dests_non() called with invalid mode (%o)\n",
1005                         (int)file->mode);
1006                 exit_cleanup(RERR_UNSUPPORTED);
1007         }
1008
1009         do {
1010                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1011                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1012                         continue;
1013                 switch (type) {
1014                 case TYPE_DIR:
1015                         if (!S_ISDIR(sxp->st.st_mode))
1016                                 continue;
1017                         break;
1018                 case TYPE_SPECIAL:
1019                         if (!IS_SPECIAL(sxp->st.st_mode))
1020                                 continue;
1021                         break;
1022                 case TYPE_DEVICE:
1023                         if (!IS_DEVICE(sxp->st.st_mode))
1024                                 continue;
1025                         break;
1026                 case TYPE_SYMLINK:
1027 #ifdef SUPPORT_LINKS
1028                         if (!S_ISLNK(sxp->st.st_mode))
1029                                 continue;
1030                         break;
1031 #else
1032                         return -1;
1033 #endif
1034                 }
1035                 if (match_level < 1) {
1036                         match_level = 1;
1037                         best_match = j;
1038                 }
1039                 switch (type) {
1040                 case TYPE_DIR:
1041                 case TYPE_SPECIAL:
1042                         break;
1043                 case TYPE_DEVICE:
1044                         devp = F_RDEV_P(file);
1045                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1046                                 continue;
1047                         break;
1048                 case TYPE_SYMLINK:
1049 #ifdef SUPPORT_LINKS
1050                         if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1051                                 continue;
1052                         lnk[len] = '\0';
1053                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1054                                 continue;
1055                         break;
1056 #else
1057                         return -1;
1058 #endif
1059                 }
1060                 if (match_level < 2) {
1061                         match_level = 2;
1062                         best_match = j;
1063                 }
1064                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1065                         match_level = 3;
1066                         best_match = j;
1067                         break;
1068                 }
1069         } while (basis_dir[++j] != NULL);
1070
1071         if (!match_level)
1072                 return -1;
1073
1074         if (j != best_match) {
1075                 j = best_match;
1076                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1077                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1078                         return -1;
1079         }
1080
1081         if (match_level == 3) {
1082 #ifdef SUPPORT_HARD_LINKS
1083                 if (link_dest
1084 #ifndef CAN_HARDLINK_SYMLINK
1085                  && !S_ISLNK(file->mode)
1086 #endif
1087 #ifndef CAN_HARDLINK_SPECIAL
1088                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1089 #endif
1090                  && !S_ISDIR(file->mode)) {
1091                         if (do_link(cmpbuf, fname) < 0) {
1092                                 rsyserr(FERROR_XFER, errno,
1093                                         "failed to hard-link %s with %s",
1094                                         cmpbuf, fname);
1095                                 return j;
1096                         }
1097                         if (preserve_hard_links && F_IS_HLINKED(file))
1098                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1099                 } else
1100 #endif
1101                         match_level = 2;
1102                 if (itemizing && stdout_format_has_i
1103                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1104                         int chg = compare_dest && type != TYPE_DIR ? 0
1105                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1106                         char *lp = match_level == 3 ? "" : NULL;
1107                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1108                 }
1109                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1110                         rprintf(FCLIENT, "%s%s is uptodate\n",
1111                                 fname, type == TYPE_DIR ? "/" : "");
1112                 }
1113                 return -2;
1114         }
1115
1116         return j;
1117 }
1118
1119 static void list_file_entry(struct file_struct *f)
1120 {
1121         char permbuf[PERMSTRING_SIZE];
1122         int64 len;
1123         int colwidth = human_readable ? 14 : 11;
1124
1125         if (!F_IS_ACTIVE(f)) {
1126                 /* this can happen if duplicate names were removed */
1127                 return;
1128         }
1129
1130         permstring(permbuf, f->mode);
1131         len = F_LENGTH(f);
1132
1133         /* TODO: indicate '+' if the entry has an ACL. */
1134
1135 #ifdef SUPPORT_LINKS
1136         if (preserve_links && S_ISLNK(f->mode)) {
1137                 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1138                         permbuf, colwidth, human_num(len),
1139                         timestring(f->modtime), f_name(f, NULL),
1140                         F_SYMLINK(f));
1141         } else
1142 #endif
1143         if (missing_args == 2 && f->mode == 0) {
1144                 rprintf(FINFO, "%-*s %s\n",
1145                         colwidth + 31, "*missing",
1146                         f_name(f, NULL));
1147         } else {
1148                 rprintf(FINFO, "%s %*s %s %s\n",
1149                         permbuf, colwidth, human_num(len),
1150                         timestring(f->modtime), f_name(f, NULL));
1151         }
1152 }
1153
1154 static int phase = 0;
1155 static int dflt_perms;
1156
1157 static int implied_dirs_are_missing;
1158 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1159 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1160 {
1161         return F_DEPTH(file) > F_DEPTH(subtree)
1162                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1163 }
1164
1165 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1166  * make sure it exists, and has the right permissions/timestamp info.  For
1167  * all other non-regular files (symlinks, etc.) we create them here.  For
1168  * regular files that have changed, we try to find a basis file and then
1169  * start sending checksums.  The ndx is the file's unique index value.
1170  *
1171  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1172  * passed to delete_item(), which can use it during a recursive delete.)
1173  *
1174  * Note that f_out is set to -1 when doing final directory-permission and
1175  * modification-time repair. */
1176 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1177                            int itemizing, enum logcode code, int f_out)
1178 {
1179         static const char *parent_dirname = "";
1180         static struct file_struct *prior_dir_file = NULL;
1181         /* Missing dir not created due to --dry-run; will still be scanned. */
1182         static struct file_struct *dry_missing_dir = NULL;
1183         /* Missing dir whose contents are skipped altogether due to
1184          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1185         static struct file_struct *skip_dir = NULL;
1186         static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1187         static int need_fuzzy_dirlist = 0;
1188         struct file_struct *fuzzy_file = NULL;
1189         int fd = -1, f_copy = -1;
1190         stat_x sx, real_sx;
1191         STRUCT_STAT partial_st;
1192         struct file_struct *back_file = NULL;
1193         int statret, real_ret, stat_errno;
1194         char *fnamecmp, *partialptr, *backupptr = NULL;
1195         char fnamecmpbuf[MAXPATHLEN];
1196         uchar fnamecmp_type;
1197         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1198         int is_dir = !S_ISDIR(file->mode) ? 0
1199                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1200                    : 1;
1201
1202         if (DEBUG_GTE(GENR, 1))
1203                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1204
1205         if (list_only) {
1206                 if (is_dir < 0
1207                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1208                         return;
1209                 list_file_entry(file);
1210                 return;
1211         }
1212
1213         maybe_ATTRS_SET_NANO = always_checksum ? ATTRS_SET_NANO : 0;
1214
1215         if (skip_dir) {
1216                 if (is_below(file, skip_dir)) {
1217                         if (is_dir)
1218                                 file->flags |= FLAG_MISSING_DIR;
1219 #ifdef SUPPORT_HARD_LINKS
1220                         else if (F_IS_HLINKED(file))
1221                                 handle_skipped_hlink(file, itemizing, code, f_out);
1222 #endif
1223                         return;
1224                 }
1225                 skip_dir = NULL;
1226         }
1227
1228         init_stat_x(&sx);
1229         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1230                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1231                         if (is_dir < 0)
1232                                 return;
1233 #ifdef SUPPORT_HARD_LINKS
1234                         if (F_IS_HLINKED(file))
1235                                 handle_skipped_hlink(file, itemizing, code, f_out);
1236 #endif
1237                         rprintf(FERROR_XFER,
1238                                 "ERROR: daemon refused to receive %s \"%s\"\n",
1239                                 is_dir ? "directory" : "file", fname);
1240                         if (is_dir)
1241                                 goto skipping_dir_contents;
1242                         return;
1243                 }
1244         }
1245
1246         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1247                 int i;
1248           parent_is_dry_missing:
1249                 for (i = 0; i < fuzzy_basis; i++) {
1250                         if (fuzzy_dirlist[i]) {
1251                                 flist_free(fuzzy_dirlist[i]);
1252                                 fuzzy_dirlist[i] = NULL;
1253                         }
1254                 }
1255                 parent_dirname = "";
1256                 statret = -1;
1257                 stat_errno = ENOENT;
1258         } else {
1259                 const char *dn = file->dirname ? file->dirname : ".";
1260                 dry_missing_dir = NULL;
1261                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1262                         /* Each parent dir must be in the file list or the flist data is bad.
1263                          * Optimization: most of the time the parent dir will be the last dir
1264                          * this function was asked to process in the file list. */
1265                         if (!inc_recurse
1266                          && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
1267                          && (!prior_dir_file || strcmp(dn, f_name(prior_dir_file, NULL)) != 0)
1268                          && flist_find_name(cur_flist, dn, 1) < 0) {
1269                                 rprintf(FERROR,
1270                                         "ABORTING due to invalid path from sender: %s/%s\n",
1271                                         dn, file->basename);
1272                                 exit_cleanup(RERR_PROTOCOL);
1273                         }
1274                         if (relative_paths && !implied_dirs
1275                          && do_stat(dn, &sx.st) < 0) {
1276                                 if (dry_run)
1277                                         goto parent_is_dry_missing;
1278                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1279                                         rsyserr(FERROR_XFER, errno,
1280                                                 "recv_generator: mkdir %s failed",
1281                                                 full_fname(dn));
1282                                 }
1283                         }
1284                         if (fuzzy_basis) {
1285                                 int i;
1286                                 for (i = 0; i < fuzzy_basis; i++) {
1287                                         if (fuzzy_dirlist[i]) {
1288                                                 flist_free(fuzzy_dirlist[i]);
1289                                                 fuzzy_dirlist[i] = NULL;
1290                                         }
1291                                 }
1292                                 need_fuzzy_dirlist = 1;
1293                         }
1294 #ifdef SUPPORT_ACLS
1295                         if (!preserve_perms)
1296                                 dflt_perms = default_perms_for_dir(dn);
1297 #endif
1298                 }
1299                 parent_dirname = dn;
1300
1301                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1302                         int i;
1303                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1304                         for (i = 0; i < fuzzy_basis; i++) {
1305                                 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1306                                         continue;
1307                                 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES);
1308                                 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1309                                         flist_free(fuzzy_dirlist[i]);
1310                                         fuzzy_dirlist[i] = NULL;
1311                                 }
1312                         }
1313                         need_fuzzy_dirlist = 0;
1314                 }
1315
1316                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1317                 stat_errno = errno;
1318         }
1319
1320         if (missing_args == 2 && file->mode == 0) {
1321                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1322                         return;
1323                 if (statret == 0)
1324                         delete_item(fname, sx.st.st_mode, del_opts);
1325                 return;
1326         }
1327
1328         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1329                 if (is_dir) {
1330                         if (is_dir < 0)
1331                                 return;
1332                         skip_dir = file;
1333                         file->flags |= FLAG_MISSING_DIR;
1334                 }
1335 #ifdef SUPPORT_HARD_LINKS
1336                 else if (F_IS_HLINKED(file))
1337                         handle_skipped_hlink(file, itemizing, code, f_out);
1338 #endif
1339                 if (INFO_GTE(SKIP, 1)) {
1340                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1341                                 is_dir ? "directory" : "file", fname);
1342                 }
1343                 return;
1344         }
1345
1346         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1347          && !am_root && sx.st.st_uid == our_uid)
1348                 del_opts |= DEL_NO_UID_WRITE;
1349
1350         if (ignore_existing > 0 && statret == 0
1351          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1352                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1353                         rprintf(FINFO, "%s exists\n", fname);
1354 #ifdef SUPPORT_HARD_LINKS
1355                 if (F_IS_HLINKED(file))
1356                         handle_skipped_hlink(file, itemizing, code, f_out);
1357 #endif
1358                 goto cleanup;
1359         }
1360
1361         fnamecmp = fname;
1362
1363         if (is_dir) {
1364                 mode_t added_perms;
1365                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1366                         goto cleanup;
1367                 if (am_root < 0) {
1368                         /* For --fake-super, the dir must be useable by the copying
1369                          * user, just like it would be for root. */
1370                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1371                 } else
1372                         added_perms = 0;
1373                 if (is_dir < 0) {
1374                         if (!(preserve_times & PRESERVE_DIR_TIMES))
1375                                 return;
1376                         /* In inc_recurse mode we want to make sure any missing
1377                          * directories get created while we're still processing
1378                          * the parent dir (which allows us to touch the parent
1379                          * dir's mtime right away).  We will handle the dir in
1380                          * full later (right before we handle its contents). */
1381                         if (statret == 0
1382                          && (S_ISDIR(sx.st.st_mode)
1383                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1384                                 goto cleanup; /* Any errors get reported later. */
1385                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1386                                 file->flags |= FLAG_DIR_CREATED;
1387                         goto cleanup;
1388                 }
1389                 /* The file to be received is a directory, so we need
1390                  * to prepare appropriately.  If there is already a
1391                  * file of that name and it is *not* a directory, then
1392                  * we need to delete it.  If it doesn't exist, then
1393                  * (perhaps recursively) create it. */
1394                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1395                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1396                                 goto skipping_dir_contents;
1397                         statret = -1;
1398                 }
1399                 if (dry_run && statret != 0) {
1400                         if (!dry_missing_dir)
1401                                 dry_missing_dir = file;
1402                         file->flags |= FLAG_MISSING_DIR;
1403                 }
1404                 init_stat_x(&real_sx);
1405                 real_sx.st = sx.st;
1406                 real_ret = statret;
1407                 if (file->flags & FLAG_DIR_CREATED)
1408                         statret = -1;
1409                 if (!preserve_perms) { /* See comment in non-dir code below. */
1410                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1411                                                dflt_perms, statret == 0);
1412                 }
1413                 if (statret != 0 && basis_dir[0] != NULL) {
1414                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1415                                               itemizing, code);
1416                         if (j == -2) {
1417                                 itemizing = 0;
1418                                 code = FNONE;
1419                                 statret = 1;
1420                         } else if (j >= 0) {
1421                                 statret = 1;
1422                                 fnamecmp = fnamecmpbuf;
1423                         }
1424                 }
1425                 if (itemizing && f_out != -1) {
1426                         itemize(fnamecmp, file, ndx, statret, &sx,
1427                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1428                 }
1429                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1430                         if (!relative_paths || errno != ENOENT
1431                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1432                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1433                                 rsyserr(FERROR_XFER, errno,
1434                                         "recv_generator: mkdir %s failed",
1435                                         full_fname(fname));
1436                           skipping_dir_contents:
1437                                 rprintf(FERROR,
1438                                     "*** Skipping any contents from this failed directory ***\n");
1439                                 skip_dir = file;
1440                                 file->flags |= FLAG_MISSING_DIR;
1441                                 goto cleanup;
1442                         }
1443                 }
1444
1445 #ifdef SUPPORT_XATTRS
1446                 if (preserve_xattrs && statret == 1)
1447                         copy_xattrs(fnamecmpbuf, fname);
1448 #endif
1449                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1450                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1451                         rprintf(code, "%s/\n", fname);
1452
1453                 /* We need to ensure that the dirs in the transfer have both
1454                  * readable and writable permissions during the time we are
1455                  * putting files within them.  This is then restored to the
1456                  * former permissions after the transfer is done. */
1457 #ifdef HAVE_CHMOD
1458                 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1459                         mode_t mode = file->mode | S_IRWXU;
1460                         if (do_chmod(fname, mode) < 0) {
1461                                 rsyserr(FERROR_XFER, errno,
1462                                         "failed to modify permissions on %s",
1463                                         full_fname(fname));
1464                         }
1465                         need_retouch_dir_perms = 1;
1466                 }
1467 #endif
1468
1469                 if (real_ret != 0 && one_file_system)
1470                         real_sx.st.st_dev = filesystem_dev;
1471                 if (inc_recurse) {
1472                         if (one_file_system) {
1473                                 uint32 *devp = F_DIR_DEV_P(file);
1474                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1475                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1476                         }
1477                 }
1478                 else if (delete_during && f_out != -1 && !phase
1479                     && !(file->flags & FLAG_MISSING_DIR)) {
1480                         if (file->flags & FLAG_CONTENT_DIR)
1481                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1482                         else
1483                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1484                 }
1485                 prior_dir_file = file;
1486                 goto cleanup;
1487         }
1488
1489         /* If we're not preserving permissions, change the file-list's
1490          * mode based on the local permissions and some heuristics. */
1491         if (!preserve_perms) {
1492                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1493                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1494                                        exists);
1495         }
1496
1497 #ifdef SUPPORT_HARD_LINKS
1498         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1499          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1500                 goto cleanup;
1501 #endif
1502
1503         if (preserve_links && S_ISLNK(file->mode)) {
1504 #ifdef SUPPORT_LINKS
1505                 const char *sl = F_SYMLINK(file);
1506                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1507                         if (INFO_GTE(NAME, 1)) {
1508                                 if (solo_file) {
1509                                         /* fname contains the destination path, but we
1510                                          * want to report the source path. */
1511                                         fname = f_name(file, NULL);
1512                                 }
1513                                 rprintf(FINFO,
1514                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1515                                         fname, sl);
1516                         }
1517                         return;
1518                 }
1519                 if (statret == 0) {
1520                         char lnk[MAXPATHLEN];
1521                         int len;
1522
1523                         if (S_ISLNK(sx.st.st_mode)
1524                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1525                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1526                                 /* The link is pointing to the right place. */
1527                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1528                                 if (itemizing)
1529                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1530 #ifdef SUPPORT_HARD_LINKS
1531                                 if (preserve_hard_links && F_IS_HLINKED(file))
1532                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1533 #endif
1534                                 if (remove_source_files == 1)
1535                                         goto return_with_success;
1536                                 goto cleanup;
1537                         }
1538                 } else if (basis_dir[0] != NULL) {
1539                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1540                                               itemizing, code);
1541                         if (j == -2) {
1542 #ifndef CAN_HARDLINK_SYMLINK
1543                                 if (link_dest) {
1544                                         /* Resort to --copy-dest behavior. */
1545                                 } else
1546 #endif
1547                                 if (!copy_dest)
1548                                         goto cleanup;
1549                                 itemizing = 0;
1550                                 code = FNONE;
1551                         } else if (j >= 0) {
1552                                 statret = 1;
1553                                 fnamecmp = fnamecmpbuf;
1554                         }
1555                 }
1556                 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1557                         set_file_attrs(fname, file, NULL, NULL, 0);
1558                         if (itemizing) {
1559                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1560                                         statret = -1;
1561                                 itemize(fnamecmp, file, ndx, statret, &sx,
1562                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1563                         }
1564                         if (code != FNONE && INFO_GTE(NAME, 1))
1565                                 rprintf(code, "%s -> %s\n", fname, sl);
1566 #ifdef SUPPORT_HARD_LINKS
1567                         if (preserve_hard_links && F_IS_HLINKED(file))
1568                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1569 #endif
1570                         /* This does not check remove_source_files == 1
1571                          * because this is one of the items that the old
1572                          * --remove-sent-files option would remove. */
1573                         if (remove_source_files)
1574                                 goto return_with_success;
1575                 }
1576 #endif
1577                 goto cleanup;
1578         }
1579
1580         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1581          || (preserve_specials && IS_SPECIAL(file->mode))) {
1582                 dev_t rdev;
1583                 int del_for_flag = 0;
1584                 if (IS_DEVICE(file->mode)) {
1585                         uint32 *devp = F_RDEV_P(file);
1586                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1587                 } else
1588                         rdev = 0;
1589                 if (statret == 0) {
1590                         if (IS_DEVICE(file->mode)) {
1591                                 if (!IS_DEVICE(sx.st.st_mode))
1592                                         statret = -1;
1593                                 del_for_flag = DEL_FOR_DEVICE;
1594                         } else {
1595                                 if (!IS_SPECIAL(sx.st.st_mode))
1596                                         statret = -1;
1597                                 del_for_flag = DEL_FOR_SPECIAL;
1598                         }
1599                         if (statret == 0
1600                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1601                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1602                                 /* The device or special file is identical. */
1603                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1604                                 if (itemizing)
1605                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1606 #ifdef SUPPORT_HARD_LINKS
1607                                 if (preserve_hard_links && F_IS_HLINKED(file))
1608                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1609 #endif
1610                                 if (remove_source_files == 1)
1611                                         goto return_with_success;
1612                                 goto cleanup;
1613                         }
1614                 } else if (basis_dir[0] != NULL) {
1615                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1616                                               itemizing, code);
1617                         if (j == -2) {
1618 #ifndef CAN_HARDLINK_SPECIAL
1619                                 if (link_dest) {
1620                                         /* Resort to --copy-dest behavior. */
1621                                 } else
1622 #endif
1623                                 if (!copy_dest)
1624                                         goto cleanup;
1625                                 itemizing = 0;
1626                                 code = FNONE;
1627                         } else if (j >= 0) {
1628                                 statret = 1;
1629                                 fnamecmp = fnamecmpbuf;
1630                         }
1631                 }
1632                 if (DEBUG_GTE(GENR, 1)) {
1633                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1634                                 fname, (int)file->mode,
1635                                 (long)major(rdev), (long)minor(rdev));
1636                 }
1637                 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1638                         set_file_attrs(fname, file, NULL, NULL, 0);
1639                         if (itemizing) {
1640                                 itemize(fnamecmp, file, ndx, statret, &sx,
1641                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1642                         }
1643                         if (code != FNONE && INFO_GTE(NAME, 1))
1644                                 rprintf(code, "%s\n", fname);
1645 #ifdef SUPPORT_HARD_LINKS
1646                         if (preserve_hard_links && F_IS_HLINKED(file))
1647                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1648 #endif
1649                         if (remove_source_files == 1)
1650                                 goto return_with_success;
1651                 }
1652                 goto cleanup;
1653         }
1654
1655         if (!S_ISREG(file->mode)) {
1656                 if (solo_file)
1657                         fname = f_name(file, NULL);
1658                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1659                 goto cleanup;
1660         }
1661
1662         if (max_size >= 0 && F_LENGTH(file) > max_size) {
1663                 if (INFO_GTE(SKIP, 1)) {
1664                         if (solo_file)
1665                                 fname = f_name(file, NULL);
1666                         rprintf(FINFO, "%s is over max-size\n", fname);
1667                 }
1668                 goto cleanup;
1669         }
1670         if (min_size >= 0 && F_LENGTH(file) < min_size) {
1671                 if (INFO_GTE(SKIP, 1)) {
1672                         if (solo_file)
1673                                 fname = f_name(file, NULL);
1674                         rprintf(FINFO, "%s is under min-size\n", fname);
1675                 }
1676                 goto cleanup;
1677         }
1678
1679         if (update_only > 0 && statret == 0 && time_diff(&sx.st, file) > 0) {
1680                 if (INFO_GTE(SKIP, 1))
1681                         rprintf(FINFO, "%s is newer\n", fname);
1682 #ifdef SUPPORT_HARD_LINKS
1683                 if (F_IS_HLINKED(file))
1684                         handle_skipped_hlink(file, itemizing, code, f_out);
1685 #endif
1686                 goto cleanup;
1687         }
1688
1689         fnamecmp_type = FNAMECMP_FNAME;
1690
1691         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1692                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1693                         goto cleanup;
1694                 statret = -1;
1695                 stat_errno = ENOENT;
1696         }
1697
1698         if (basis_dir[0] != NULL && (statret != 0 || !copy_dest)) {
1699                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1700                                       statret == 0, itemizing, code);
1701                 if (j == -2) {
1702                         if (remove_source_files == 1)
1703                                 goto return_with_success;
1704                         goto cleanup;
1705                 }
1706                 if (j >= 0) {
1707                         fnamecmp = fnamecmpbuf;
1708                         fnamecmp_type = j;
1709                         statret = 0;
1710                 }
1711         }
1712
1713         init_stat_x(&real_sx);
1714         real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1715         real_ret = statret;
1716
1717         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1718             && link_stat(partialptr, &partial_st, 0) == 0
1719             && S_ISREG(partial_st.st_mode)) {
1720                 if (statret != 0)
1721                         goto prepare_to_open;
1722         } else
1723                 partialptr = NULL;
1724
1725         if (statret != 0 && fuzzy_basis) {
1726                 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1727                 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1728                 if (fuzzy_file) {
1729                         f_name(fuzzy_file, fnamecmpbuf);
1730                         if (DEBUG_GTE(FUZZY, 1)) {
1731                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1732                                         fname, fnamecmpbuf);
1733                         }
1734                         sx.st.st_size = F_LENGTH(fuzzy_file);
1735                         statret = 0;
1736                         fnamecmp = fnamecmpbuf;
1737                 }
1738         }
1739
1740         if (statret != 0) {
1741 #ifdef SUPPORT_HARD_LINKS
1742                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1743                         cur_flist->in_progress++;
1744                         goto cleanup;
1745                 }
1746 #endif
1747                 if (stat_errno == ENOENT)
1748                         goto notify_others;
1749                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1750                         full_fname(fname));
1751                 goto cleanup;
1752         }
1753
1754         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1755                 ;
1756         else if (fnamecmp_type >= FNAMECMP_FUZZY)
1757                 ;
1758         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1759                 if (partialptr) {
1760                         do_unlink(partialptr);
1761                         handle_partial_dir(partialptr, PDIR_DELETE);
1762                 }
1763                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT | maybe_ATTRS_SET_NANO);
1764                 if (itemizing)
1765                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1766 #ifdef SUPPORT_HARD_LINKS
1767                 if (preserve_hard_links && F_IS_HLINKED(file))
1768                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1769 #endif
1770                 if (remove_source_files != 1)
1771                         goto cleanup;
1772           return_with_success:
1773                 if (!dry_run)
1774                         send_msg_int(MSG_SUCCESS, ndx);
1775                 goto cleanup;
1776         }
1777
1778         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1779 #ifdef SUPPORT_HARD_LINKS
1780                 if (F_IS_HLINKED(file))
1781                         handle_skipped_hlink(file, itemizing, code, f_out);
1782 #endif
1783                 goto cleanup;
1784         }
1785
1786   prepare_to_open:
1787         if (partialptr) {
1788                 sx.st = partial_st;
1789                 fnamecmp = partialptr;
1790                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1791                 statret = 0;
1792         }
1793
1794         if (!do_xfers)
1795                 goto notify_others;
1796
1797         if (read_batch || whole_file) {
1798                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1799                         if (!(backupptr = get_backup_name(fname)))
1800                                 goto cleanup;
1801                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1802                                 goto pretend_missing;
1803                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1804                                 unmake_file(back_file);
1805                                 back_file = NULL;
1806                                 goto cleanup;
1807                         }
1808                 }
1809                 goto notify_others;
1810         }
1811
1812         if (fuzzy_dirlist[0]) {
1813                 int j = flist_find(fuzzy_dirlist[0], file);
1814                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1815                         fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1816         }
1817
1818         /* open the file */
1819         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1820                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1821                         full_fname(fnamecmp));
1822           pretend_missing:
1823                 /* pretend the file didn't exist */
1824 #ifdef SUPPORT_HARD_LINKS
1825                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1826                         cur_flist->in_progress++;
1827                         goto cleanup;
1828                 }
1829 #endif
1830                 statret = real_ret = -1;
1831                 goto notify_others;
1832         }
1833
1834         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1835                 if (!(backupptr = get_backup_name(fname))) {
1836                         close(fd);
1837                         goto cleanup;
1838                 }
1839                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1840                         close(fd);
1841                         goto pretend_missing;
1842                 }
1843                 if (robust_unlink(backupptr) && errno != ENOENT) {
1844                         rsyserr(FERROR_XFER, errno, "unlink %s",
1845                                 full_fname(backupptr));
1846                         unmake_file(back_file);
1847                         back_file = NULL;
1848                         close(fd);
1849                         goto cleanup;
1850                 }
1851                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1852                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1853                         unmake_file(back_file);
1854                         back_file = NULL;
1855                         close(fd);
1856                         goto cleanup;
1857                 }
1858                 fnamecmp_type = FNAMECMP_BACKUP;
1859         }
1860
1861         if (DEBUG_GTE(DELTASUM, 3)) {
1862                 rprintf(FINFO, "gen mapped %s of size %s\n",
1863                         fnamecmp, big_num(sx.st.st_size));
1864         }
1865
1866         if (DEBUG_GTE(DELTASUM, 2))
1867                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1868
1869   notify_others:
1870         if (remove_source_files && !delay_updates && !phase && !dry_run)
1871                 increment_active_files(ndx, itemizing, code);
1872         if (inc_recurse && (!dry_run || write_batch < 0))
1873                 cur_flist->in_progress++;
1874 #ifdef SUPPORT_HARD_LINKS
1875         if (preserve_hard_links && F_IS_HLINKED(file))
1876                 file->flags |= FLAG_FILE_SENT;
1877 #endif
1878         write_ndx(f_out, ndx);
1879         if (itemizing) {
1880                 int iflags = ITEM_TRANSFER;
1881                 if (always_checksum > 0)
1882                         iflags |= ITEM_REPORT_CHANGE;
1883                 if (fnamecmp_type != FNAMECMP_FNAME)
1884                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1885                 if (fnamecmp_type >= FNAMECMP_FUZZY)
1886                         iflags |= ITEM_XNAME_FOLLOWS;
1887                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1888                         fuzzy_file ? fuzzy_file->basename : NULL);
1889                 free_stat_x(&real_sx);
1890         }
1891
1892         if (!do_xfers) {
1893 #ifdef SUPPORT_HARD_LINKS
1894                 if (preserve_hard_links && F_IS_HLINKED(file))
1895                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1896 #endif
1897                 goto cleanup;
1898         }
1899         if (read_batch)
1900                 goto cleanup;
1901
1902         if (statret != 0 || whole_file)
1903                 write_sum_head(f_out, NULL);
1904         else if (sx.st.st_size <= 0) {
1905                 write_sum_head(f_out, NULL);
1906                 close(fd);
1907         } else {
1908                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1909                         rprintf(FWARNING,
1910                             "WARNING: file is too large for checksum sending: %s\n",
1911                             fnamecmp);
1912                         write_sum_head(f_out, NULL);
1913                 }
1914                 close(fd);
1915         }
1916
1917   cleanup:
1918         if (back_file) {
1919                 int save_preserve_xattrs = preserve_xattrs;
1920                 if (f_copy >= 0)
1921                         close(f_copy);
1922 #ifdef SUPPORT_XATTRS
1923                 if (preserve_xattrs) {
1924                         copy_xattrs(fname, backupptr);
1925                         preserve_xattrs = 0;
1926                 }
1927 #endif
1928                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1929                 preserve_xattrs = save_preserve_xattrs;
1930                 if (INFO_GTE(BACKUP, 1)) {
1931                         rprintf(FINFO, "backed up %s to %s\n",
1932                                 fname, backupptr);
1933                 }
1934                 unmake_file(back_file);
1935         }
1936
1937         free_stat_x(&sx);
1938 }
1939
1940 /* If we are replacing an existing hard link, symlink, device, or special file,
1941  * create a temp-name item and rename it into place.  A symlimk specifies slnk,
1942  * a hard link specifies hlnk, otherwise we create a device based on rdev.
1943  * Specify 0 for the del_for_flag if there is not a file to replace.  This
1944  * returns 1 on success and 0 on failure. */
1945 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1946                   dev_t rdev, stat_x *sxp, int del_for_flag)
1947 {
1948         char tmpname[MAXPATHLEN];
1949         const char *create_name;
1950         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1951
1952         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1953                 skip_atomic = 1;
1954         else
1955                 skip_atomic = 0;
1956
1957         if (del_for_flag) {
1958                 if (make_backups > 0 && !dir_in_the_way) {
1959                         if (!make_backup(fname, skip_atomic))
1960                                 return 0;
1961                 } else if (skip_atomic) {
1962                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1963                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1964                                 return 0;
1965                 }
1966         }
1967
1968         create_name = skip_atomic ? fname : tmpname;
1969
1970         if (slnk) {
1971 #ifdef SUPPORT_LINKS
1972                 if (do_symlink(slnk, create_name) < 0) {
1973                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1974                                 full_fname(create_name), slnk);
1975                         return 0;
1976                 }
1977 #else
1978                 return 0;
1979 #endif
1980         } else if (hlnk) {
1981 #ifdef SUPPORT_HARD_LINKS
1982                 if (!hard_link_one(file, create_name, hlnk, 0))
1983                         return 0;
1984 #else
1985                 return 0;
1986 #endif
1987         } else {
1988                 if (do_mknod(create_name, file->mode, rdev) < 0) {
1989                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1990                                 full_fname(create_name));
1991                         return 0;
1992                 }
1993         }
1994
1995         if (!skip_atomic) {
1996                 if (do_rename(tmpname, fname) < 0) {
1997                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
1998                                 full_fname(tmpname), full_fname(fname));
1999                         do_unlink(tmpname);
2000                         return 0;
2001                 }
2002         }
2003
2004         return 1;
2005 }
2006
2007 #ifdef SUPPORT_HARD_LINKS
2008 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2009                                  enum logcode code, int f_out)
2010 {
2011         char fbuf[MAXPATHLEN];
2012         int new_last_ndx;
2013         struct file_list *save_flist = cur_flist;
2014
2015         /* If we skip the last item in a chain of links and there was a
2016          * prior non-skipped hard-link waiting to finish, finish it now. */
2017         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2018                 return;
2019
2020         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2021         cur_flist->in_progress--; /* undo prior increment */
2022         f_name(file, fbuf);
2023         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2024
2025         cur_flist = save_flist;
2026 }
2027 #endif
2028
2029 static void touch_up_dirs(struct file_list *flist, int ndx)
2030 {
2031         static int counter = 0;
2032         struct file_struct *file;
2033         char *fname;
2034         BOOL fix_dir_perms;
2035         int i, start, end;
2036
2037         if (ndx < 0) {
2038                 start = 0;
2039                 end = flist->used - 1;
2040         } else
2041                 start = end = ndx;
2042
2043         /* Fix any directory permissions that were modified during the
2044          * transfer and/or re-set any tweaked modified-time values. */
2045         for (i = start; i <= end; i++, counter++) {
2046                 file = flist->files[i];
2047                 if (!F_IS_ACTIVE(file))
2048                         continue;
2049                 if (!S_ISDIR(file->mode)
2050                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2051                         continue;
2052                 if (DEBUG_GTE(TIME, 2)) {
2053                         fname = f_name(file, NULL);
2054                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2055                                 NS(fname), i);
2056                 }
2057                 /* Be sure not to retouch permissions with --fake-super. */
2058                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2059                 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2060                         continue;
2061                 fname = f_name(file, NULL);
2062                 if (fix_dir_perms)
2063                         do_chmod(fname, file->mode);
2064                 if (need_retouch_dir_times) {
2065                         STRUCT_STAT st;
2066                         if (link_stat(fname, &st, 0) == 0 && time_diff(&st, file))
2067                                 set_modtime(fname, file->modtime, F_MOD_NSEC(file), file->mode);
2068                 }
2069                 if (counter >= loopchk_limit) {
2070                         if (allowed_lull)
2071                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2072                         else
2073                                 maybe_flush_socket(0);
2074                         counter = 0;
2075                 }
2076         }
2077 }
2078
2079 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2080 {
2081         struct file_struct *file;
2082         struct file_list *flist;
2083         char fbuf[MAXPATHLEN];
2084         int ndx;
2085
2086         while (1) {
2087 #ifdef SUPPORT_HARD_LINKS
2088                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2089                         int send_failed = (ndx == -2);
2090                         if (send_failed)
2091                                 ndx = get_hlink_num();
2092                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2093                         file = flist->files[ndx - flist->ndx_start];
2094                         assert(file->flags & FLAG_HLINKED);
2095                         if (send_failed)
2096                                 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2097                         else
2098                                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2099                         flist->in_progress--;
2100                         continue;
2101                 }
2102 #endif
2103
2104                 if (check_redo && (ndx = get_redo_num()) != -1) {
2105                         OFF_T save_max_size = max_size;
2106                         OFF_T save_min_size = min_size;
2107                         csum_length = SUM_LENGTH;
2108                         max_size = -1;
2109                         min_size = -1;
2110                         ignore_existing = -ignore_existing;
2111                         ignore_non_existing = -ignore_non_existing;
2112                         update_only = -update_only;
2113                         always_checksum = -always_checksum;
2114                         size_only = -size_only;
2115                         append_mode = -append_mode;
2116                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2117                         ignore_times++;
2118
2119                         flist = cur_flist;
2120                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2121
2122                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2123                         if (solo_file)
2124                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2125                         else
2126                                 f_name(file, fbuf);
2127                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2128                         cur_flist->to_redo--;
2129
2130                         cur_flist = flist;
2131
2132                         csum_length = SHORT_SUM_LENGTH;
2133                         max_size = save_max_size;
2134                         min_size = save_min_size;
2135                         ignore_existing = -ignore_existing;
2136                         ignore_non_existing = -ignore_non_existing;
2137                         update_only = -update_only;
2138                         always_checksum = -always_checksum;
2139                         size_only = -size_only;
2140                         append_mode = -append_mode;
2141                         make_backups = -make_backups;
2142                         ignore_times--;
2143                         continue;
2144                 }
2145
2146                 if (cur_flist == first_flist)
2147                         break;
2148
2149                 /* We only get here if inc_recurse is enabled. */
2150                 if (first_flist->in_progress || first_flist->to_redo)
2151                         break;
2152
2153                 write_ndx(sock_f_out, NDX_DONE);
2154                 if (!read_batch && !flist_eof) {
2155                         int old_total = 0;
2156                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2157                                 old_total += flist->used;
2158                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2159                 }
2160
2161                 if (delete_during == 2 || !dir_tweaking) {
2162                         /* Skip directory touch-up. */
2163                 } else if (first_flist->parent_ndx >= 0)
2164                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2165
2166                 flist_free(first_flist); /* updates first_flist */
2167         }
2168 }
2169
2170 void generate_files(int f_out, const char *local_name)
2171 {
2172         int i, ndx, next_loopchk = 0;
2173         char fbuf[MAXPATHLEN];
2174         int itemizing;
2175         enum logcode code;
2176         int save_info_flist = info_levels[INFO_FLIST];
2177         int save_info_progress = info_levels[INFO_PROGRESS];
2178
2179         if (protocol_version >= 29) {
2180                 itemizing = 1;
2181                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2182                 code = logfile_format_has_i ? FNONE : FLOG;
2183         } else if (am_daemon) {
2184                 itemizing = logfile_format_has_i && do_xfers;
2185                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2186                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2187         } else if (!am_server) {
2188                 itemizing = stdout_format_has_i;
2189                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2190                 code = itemizing ? FNONE : FINFO;
2191         } else {
2192                 itemizing = 0;
2193                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2194                 code = FINFO;
2195         }
2196         solo_file = local_name;
2197         dir_tweaking = !(list_only || solo_file || dry_run);
2198         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2199         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2200         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2201             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2202         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2203
2204         if (DEBUG_GTE(GENR, 1))
2205                 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2206
2207         if (delete_before && !solo_file && cur_flist->used > 0)
2208                 do_delete_pass();
2209         if (delete_during == 2) {
2210                 deldelay_size = BIGPATHBUFLEN * 4;
2211                 deldelay_buf = new_array(char, deldelay_size);
2212                 if (!deldelay_buf)
2213                         out_of_memory("delete-delay");
2214         }
2215         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2216
2217         if (append_mode > 0 || whole_file < 0)
2218                 whole_file = 0;
2219         if (DEBUG_GTE(FLIST, 1)) {
2220                 rprintf(FINFO, "delta-transmission %s\n",
2221                         whole_file
2222                         ? "disabled for local transfer or --whole-file"
2223                         : "enabled");
2224         }
2225
2226         dflt_perms = (ACCESSPERMS & ~orig_umask);
2227
2228         do {
2229 #ifdef SUPPORT_HARD_LINKS
2230                 if (preserve_hard_links && inc_recurse) {
2231                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2232                                 wait_for_receiver();
2233                 }
2234 #endif
2235
2236                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2237                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2238                         if (solo_file)
2239                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2240                         else
2241                                 f_name(fp, fbuf);
2242                         ndx = cur_flist->ndx_start - 1;
2243                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2244                         if (delete_during && dry_run < 2 && !list_only
2245                          && !(fp->flags & FLAG_MISSING_DIR)) {
2246                                 if (fp->flags & FLAG_CONTENT_DIR) {
2247                                         dev_t dirdev;
2248                                         if (one_file_system) {
2249                                                 uint32 *devp = F_DIR_DEV_P(fp);
2250                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2251                                         } else
2252                                                 dirdev = MAKEDEV(0, 0);
2253                                         delete_in_dir(fbuf, fp, &dirdev);
2254                                 } else
2255                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2256                         }
2257                 }
2258                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2259                         struct file_struct *file = cur_flist->sorted[i];
2260
2261                         if (!F_IS_ACTIVE(file))
2262                                 continue;
2263
2264                         if (unsort_ndx)
2265                                 ndx = F_NDX(file);
2266                         else
2267                                 ndx = i + cur_flist->ndx_start;
2268
2269                         if (solo_file)
2270                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2271                         else
2272                                 f_name(file, fbuf);
2273                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2274
2275                         check_for_finished_files(itemizing, code, 0);
2276
2277                         if (i + cur_flist->ndx_start >= next_loopchk) {
2278                                 if (allowed_lull)
2279                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2280                                 else
2281                                         maybe_flush_socket(0);
2282                                 next_loopchk += loopchk_limit;
2283                         }
2284                 }
2285
2286                 if (!inc_recurse) {
2287                         write_ndx(f_out, NDX_DONE);
2288                         break;
2289                 }
2290
2291                 while (1) {
2292                         check_for_finished_files(itemizing, code, 1);
2293                         if (cur_flist->next || flist_eof)
2294                                 break;
2295                         wait_for_receiver();
2296                 }
2297         } while ((cur_flist = cur_flist->next) != NULL);
2298
2299         if (delete_during)
2300                 delete_in_dir(NULL, NULL, &dev_zero);
2301         phase++;
2302         if (DEBUG_GTE(GENR, 1))
2303                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2304
2305         while (1) {
2306                 check_for_finished_files(itemizing, code, 1);
2307                 if (msgdone_cnt)
2308                         break;
2309                 wait_for_receiver();
2310         }
2311
2312         phase++;
2313         if (DEBUG_GTE(GENR, 1))
2314                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2315
2316         write_ndx(f_out, NDX_DONE);
2317
2318         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2319         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2320                 write_ndx(f_out, NDX_DONE);
2321
2322         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2323                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2324                         write_del_stats(f_out);
2325                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2326                         write_ndx(f_out, NDX_DONE);
2327         }
2328
2329         /* Read MSG_DONE for the redo phase (and any prior messages). */
2330         while (1) {
2331                 check_for_finished_files(itemizing, code, 0);
2332                 if (msgdone_cnt > 1)
2333                         break;
2334                 wait_for_receiver();
2335         }
2336
2337         if (protocol_version >= 29) {
2338                 phase++;
2339                 if (DEBUG_GTE(GENR, 1))
2340                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2341                 if (!EARLY_DELAY_DONE_MSG()) {
2342                         write_ndx(f_out, NDX_DONE);
2343                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2344                                 write_ndx(f_out, NDX_DONE);
2345                 }
2346                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2347                 while (msgdone_cnt == 2)
2348                         wait_for_receiver();
2349         }
2350
2351         info_levels[INFO_FLIST] = save_info_flist;
2352         info_levels[INFO_PROGRESS] = save_info_progress;
2353
2354         if (delete_during == 2)
2355                 do_delayed_deletions(fbuf);
2356         if (delete_after && !solo_file && file_total > 0)
2357                 do_delete_pass();
2358
2359         if (max_delete >= 0 && skipped_deletes) {
2360                 rprintf(FWARNING,
2361                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2362                         skipped_deletes);
2363                 io_error |= IOERR_DEL_LIMIT;
2364         }
2365
2366         if (protocol_version >= 31) {
2367                 if (!EARLY_DELETE_DONE_MSG()) {
2368                         if (INFO_GTE(STATS, 2) || read_batch)
2369                                 write_del_stats(f_out);
2370                         write_ndx(f_out, NDX_DONE);
2371                 }
2372
2373                 /* Read MSG_DONE for late-delete phase & prior messages. */
2374                 while (msgdone_cnt == 3)
2375                         wait_for_receiver();
2376         }
2377
2378         if ((need_retouch_dir_perms || need_retouch_dir_times)
2379          && dir_tweaking && (!inc_recurse || delete_during == 2))
2380                 touch_up_dirs(dir_flist, -1);
2381
2382         if (DEBUG_GTE(GENR, 1))
2383                 rprintf(FINFO, "generate_files finished\n");
2384 }