Try to fix the iconv crash in bug 11338.
[rsync.git] / receiver.c
1 /*
2  * Routines only used by the receiving process.
3  *
4  * Copyright (C) 1996-2000 Andrew Tridgell
5  * Copyright (C) 1996 Paul Mackerras
6  * Copyright (C) 2003-2019 Wayne Davison
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 3 of the License, or
11  * (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with this program; if not, visit the http://fsf.org website.
20  */
21
22 #include "rsync.h"
23 #include "inums.h"
24
25 extern int dry_run;
26 extern int do_xfers;
27 extern int am_root;
28 extern int am_server;
29 extern int inc_recurse;
30 extern int log_before_transfer;
31 extern int stdout_format_has_i;
32 extern int logfile_format_has_i;
33 extern int want_xattr_optim;
34 extern int csum_length;
35 extern int read_batch;
36 extern int write_batch;
37 extern int batch_gen_fd;
38 extern int protocol_version;
39 extern int relative_paths;
40 extern int preserve_hard_links;
41 extern int preserve_perms;
42 extern int preserve_xattrs;
43 extern int basis_dir_cnt;
44 extern int make_backups;
45 extern int cleanup_got_literal;
46 extern int remove_source_files;
47 extern int append_mode;
48 extern int sparse_files;
49 extern int preallocate_files;
50 extern int keep_partial;
51 extern int checksum_seed;
52 extern int whole_file;
53 extern int inplace;
54 extern int allowed_lull;
55 extern int delay_updates;
56 extern int xfersum_type;
57 extern mode_t orig_umask;
58 extern struct stats stats;
59 extern char *tmpdir;
60 extern char *partial_dir;
61 extern char *basis_dir[MAX_BASIS_DIRS+1];
62 extern char sender_file_sum[MAX_DIGEST_LEN];
63 extern struct file_list *cur_flist, *first_flist, *dir_flist;
64 extern filter_rule_list daemon_filter_list;
65 extern OFF_T preallocated_len;
66
67 static struct bitbag *delayed_bits = NULL;
68 static int phase = 0, redoing = 0;
69 static flist_ndx_list batch_redo_list;
70 /* We're either updating the basis file or an identical copy: */
71 static int updating_basis_or_equiv;
72
73 #define TMPNAME_SUFFIX ".XXXXXX"
74 #define TMPNAME_SUFFIX_LEN ((int)sizeof TMPNAME_SUFFIX - 1)
75 #define MAX_UNIQUE_NUMBER 999999
76 #define MAX_UNIQUE_LOOP 100
77
78 /* get_tmpname() - create a tmp filename for a given filename
79  *
80  * If a tmpdir is defined, use that as the directory to put it in.  Otherwise,
81  * the tmp filename is in the same directory as the given name.  Note that
82  * there may be no directory at all in the given name!
83  *
84  * The tmp filename is basically the given filename with a dot prepended, and
85  * .XXXXXX appended (for mkstemp() to put its unique gunk in).  We take care
86  * to not exceed either the MAXPATHLEN or NAME_MAX, especially the last, as
87  * the basename basically becomes 8 characters longer.  In such a case, the
88  * original name is shortened sufficiently to make it all fit.
89  *
90  * If the make_unique arg is True, the XXXXXX string is replaced with a unique
91  * string that doesn't exist at the time of the check.  This is intended to be
92  * used for creating hard links, symlinks, devices, and special files, since
93  * normal files should be handled by mkstemp() for safety.
94  *
95  * Of course, the only reason the file is based on the original name is to
96  * make it easier to figure out what purpose a temp file is serving when a
97  * transfer is in progress. */
98 int get_tmpname(char *fnametmp, const char *fname, BOOL make_unique)
99 {
100         int maxname, length = 0;
101         const char *f;
102         char *suf;
103
104         if (tmpdir) {
105                 /* Note: this can't overflow, so the return value is safe */
106                 length = strlcpy(fnametmp, tmpdir, MAXPATHLEN - 2);
107                 fnametmp[length++] = '/';
108         }
109
110         if ((f = strrchr(fname, '/')) != NULL) {
111                 ++f;
112                 if (!tmpdir) {
113                         length = f - fname;
114                         /* copy up to and including the slash */
115                         strlcpy(fnametmp, fname, length + 1);
116                 }
117         } else
118                 f = fname;
119
120         if (!tmpdir) { /* using a tmpdir avoids the leading dot on our temp names */
121                 if (*f == '.') /* avoid an extra leading dot for OS X's sake */
122                         f++;
123                 fnametmp[length++] = '.';
124         }
125
126         /* The maxname value is bufsize, and includes space for the '\0'.
127          * NAME_MAX needs an extra -1 for the name's leading dot. */
128         maxname = MIN(MAXPATHLEN - length - TMPNAME_SUFFIX_LEN,
129                       NAME_MAX - 1 - TMPNAME_SUFFIX_LEN);
130
131         if (maxname < 0) {
132                 rprintf(FERROR_XFER, "temporary filename too long: %s\n", fname);
133                 fnametmp[0] = '\0';
134                 return 0;
135         }
136
137         if (maxname) {
138                 int added = strlcpy(fnametmp + length, f, maxname);
139                 if (added >= maxname)
140                         added = maxname - 1;
141                 suf = fnametmp + length + added;
142
143                 /* Trim any dangling high-bit chars if the first-trimmed char (if any) is
144                  * also a high-bit char, just in case we cut into a multi-byte sequence.
145                  * We are guaranteed to stop because of the leading '.' we added. */
146                 if ((int)f[added] & 0x80) {
147                         while ((int)suf[-1] & 0x80)
148                                 suf--;
149                 }
150                 /* trim one trailing dot before our suffix's dot */
151                 if (suf[-1] == '.')
152                         suf--;
153         } else
154                 suf = fnametmp + length - 1; /* overwrite the leading dot with suffix's dot */
155
156         if (make_unique) {
157                 static unsigned counter_limit;
158                 unsigned counter;
159
160                 if (!counter_limit) {
161                         counter_limit = (unsigned)getpid() + MAX_UNIQUE_LOOP;
162                         if (counter_limit > MAX_UNIQUE_NUMBER || counter_limit < MAX_UNIQUE_LOOP)
163                                 counter_limit = MAX_UNIQUE_LOOP;
164                 }
165                 counter = counter_limit - MAX_UNIQUE_LOOP;
166
167                 /* This doesn't have to be very good because we don't need
168                  * to worry about someone trying to guess the values:  all
169                  * a conflict will do is cause a device, special file, hard
170                  * link, or symlink to fail to be created.  Also: avoid
171                  * using mktemp() due to gcc's annoying warning. */
172                 while (1) {
173                         snprintf(suf, TMPNAME_SUFFIX_LEN+1, ".%d", counter);
174                         if (access(fnametmp, 0) < 0)
175                                 break;
176                         if (++counter >= counter_limit)
177                                 return 0;
178                 }
179         } else
180                 memcpy(suf, TMPNAME_SUFFIX, TMPNAME_SUFFIX_LEN+1);
181
182         return 1;
183 }
184
185 /* Opens a temporary file for writing.
186  * Success: Writes name into fnametmp, returns fd.
187  * Failure: Clobbers fnametmp, returns -1.
188  * Calling cleanup_set() is the caller's job. */
189 int open_tmpfile(char *fnametmp, const char *fname, struct file_struct *file)
190 {
191         int fd;
192         mode_t added_perms;
193
194         if (!get_tmpname(fnametmp, fname, False))
195                 return -1;
196
197         if (am_root < 0) {
198                 /* For --fake-super, the file must be useable by the copying
199                  * user, just like it would be for root. */
200                 added_perms = S_IRUSR|S_IWUSR;
201         } else {
202                 /* For a normal copy, we need to be able to tweak things like xattrs. */
203                 added_perms = S_IWUSR;
204         }
205
206         /* We initially set the perms without the setuid/setgid bits or group
207          * access to ensure that there is no race condition.  They will be
208          * correctly updated after the right owner and group info is set.
209          * (Thanks to snabb@epipe.fi for pointing this out.) */
210         fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
211
212 #if 0
213         /* In most cases parent directories will already exist because their
214          * information should have been previously transferred, but that may
215          * not be the case with -R */
216         if (fd == -1 && relative_paths && errno == ENOENT
217          && make_path(fnametmp, MKP_SKIP_SLASH | MKP_DROP_NAME) == 0) {
218                 /* Get back to name with XXXXXX in it. */
219                 get_tmpname(fnametmp, fname, False);
220                 fd = do_mkstemp(fnametmp, (file->mode|added_perms) & INITACCESSPERMS);
221         }
222 #endif
223
224         if (fd == -1) {
225                 rsyserr(FERROR_XFER, errno, "mkstemp %s failed",
226                         full_fname(fnametmp));
227                 return -1;
228         }
229
230         return fd;
231 }
232
233 static int receive_data(int f_in, char *fname_r, int fd_r, OFF_T size_r,
234                         const char *fname, int fd, OFF_T total_size)
235 {
236         static char file_sum1[MAX_DIGEST_LEN];
237         struct map_struct *mapbuf;
238         struct sum_struct sum;
239         int sum_len;
240         int32 len;
241         OFF_T offset = 0;
242         OFF_T offset2;
243         char *data;
244         int32 i;
245         char *map = NULL;
246
247 #ifdef SUPPORT_PREALLOCATION
248         if (preallocate_files && fd != -1 && total_size > 0 && (!inplace || total_size > size_r)) {
249                 /* Try to preallocate enough space for file's eventual length.  Can
250                  * reduce fragmentation on filesystems like ext4, xfs, and NTFS. */
251                 if ((preallocated_len = do_fallocate(fd, 0, total_size)) < 0)
252                         rsyserr(FWARNING, errno, "do_fallocate %s", full_fname(fname));
253         } else
254 #endif
255         if (inplace) {
256 #ifdef HAVE_FTRUNCATE
257                 /* The most compatible way to create a sparse file is to start with no length. */
258                 if (sparse_files > 0 && whole_file && fd >= 0 && do_ftruncate(fd, 0) == 0)
259                         preallocated_len = 0;
260                 else
261 #endif
262                         preallocated_len = size_r;
263         } else
264                 preallocated_len = 0;
265
266         read_sum_head(f_in, &sum);
267
268         if (fd_r >= 0 && size_r > 0) {
269                 int32 read_size = MAX(sum.blength * 2, 16*1024);
270                 mapbuf = map_file(fd_r, size_r, read_size, sum.blength);
271                 if (DEBUG_GTE(DELTASUM, 2)) {
272                         rprintf(FINFO, "recv mapped %s of size %s\n",
273                                 fname_r, big_num(size_r));
274                 }
275         } else
276                 mapbuf = NULL;
277
278         sum_init(xfersum_type, checksum_seed);
279
280         if (append_mode > 0) {
281                 OFF_T j;
282                 sum.flength = (OFF_T)sum.count * sum.blength;
283                 if (sum.remainder)
284                         sum.flength -= sum.blength - sum.remainder;
285                 if (append_mode == 2 && mapbuf) {
286                         for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
287                                 if (INFO_GTE(PROGRESS, 1))
288                                         show_progress(offset, total_size);
289                                 sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
290                                            CHUNK_SIZE);
291                                 offset = j;
292                         }
293                         if (offset < sum.flength) {
294                                 int32 len = (int32)(sum.flength - offset);
295                                 if (INFO_GTE(PROGRESS, 1))
296                                         show_progress(offset, total_size);
297                                 sum_update(map_ptr(mapbuf, offset, len), len);
298                         }
299                 }
300                 offset = sum.flength;
301                 if (fd != -1 && (j = do_lseek(fd, offset, SEEK_SET)) != offset) {
302                         rsyserr(FERROR_XFER, errno, "lseek of %s returned %s, not %s",
303                                 full_fname(fname), big_num(j), big_num(offset));
304                         exit_cleanup(RERR_FILEIO);
305                 }
306         }
307
308         while ((i = recv_token(f_in, &data)) != 0) {
309                 if (INFO_GTE(PROGRESS, 1))
310                         show_progress(offset, total_size);
311
312                 if (allowed_lull)
313                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH | MSK_ACTIVE_RECEIVER);
314
315                 if (i > 0) {
316                         if (DEBUG_GTE(DELTASUM, 3)) {
317                                 rprintf(FINFO,"data recv %d at %s\n",
318                                         i, big_num(offset));
319                         }
320
321                         stats.literal_data += i;
322                         cleanup_got_literal = 1;
323
324                         sum_update(data, i);
325
326                         if (fd != -1 && write_file(fd, 0, offset, data, i) != i)
327                                 goto report_write_error;
328                         offset += i;
329                         continue;
330                 }
331
332                 i = -(i+1);
333                 offset2 = i * (OFF_T)sum.blength;
334                 len = sum.blength;
335                 if (i == (int)sum.count-1 && sum.remainder != 0)
336                         len = sum.remainder;
337
338                 stats.matched_data += len;
339
340                 if (DEBUG_GTE(DELTASUM, 3)) {
341                         rprintf(FINFO,
342                                 "chunk[%d] of size %ld at %s offset=%s%s\n",
343                                 i, (long)len, big_num(offset2), big_num(offset),
344                                 updating_basis_or_equiv && offset == offset2 ? " (seek)" : "");
345                 }
346
347                 if (mapbuf) {
348                         map = map_ptr(mapbuf,offset2,len);
349
350                         see_token(map, len);
351                         sum_update(map, len);
352                 }
353
354                 if (updating_basis_or_equiv) {
355                         if (offset == offset2 && fd != -1) {
356                                 if (skip_matched(fd, offset, map, len) < 0)
357                                         goto report_write_error;
358                                 offset += len;
359                                 continue;
360                         }
361                 }
362                 if (fd != -1 && map && write_file(fd, 0, offset, map, len) != (int)len)
363                         goto report_write_error;
364                 offset += len;
365         }
366
367         if (fd != -1 && offset > 0) {
368                 if (sparse_files > 0) {
369                         if (sparse_end(fd, offset) != 0)
370                                 goto report_write_error;
371                 } else if (flush_write_file(fd) < 0) {
372                     report_write_error:
373                         rsyserr(FERROR_XFER, errno, "write failed on %s", full_fname(fname));
374                         exit_cleanup(RERR_FILEIO);
375                 }
376         }
377
378 #ifdef HAVE_FTRUNCATE
379         /* inplace: New data could be shorter than old data.
380          * preallocate_files: total_size could have been an overestimate.
381          *     Cut off any extra preallocated zeros from dest file. */
382         if ((inplace || preallocated_len > offset) && fd != -1 && do_ftruncate(fd, offset) < 0) {
383                 rsyserr(FERROR_XFER, errno, "ftruncate failed on %s",
384                         full_fname(fname));
385         }
386 #endif
387
388         if (INFO_GTE(PROGRESS, 1))
389                 end_progress(total_size);
390
391         sum_len = sum_end(file_sum1);
392
393         if (mapbuf)
394                 unmap_file(mapbuf);
395
396         read_buf(f_in, sender_file_sum, sum_len);
397         if (DEBUG_GTE(DELTASUM, 2))
398                 rprintf(FINFO,"got file_sum\n");
399         if (fd != -1 && memcmp(file_sum1, sender_file_sum, sum_len) != 0)
400                 return 0;
401         return 1;
402 }
403
404
405 static void discard_receive_data(int f_in, OFF_T length)
406 {
407         receive_data(f_in, NULL, -1, 0, NULL, -1, length);
408 }
409
410 static void handle_delayed_updates(char *local_name)
411 {
412         char *fname, *partialptr;
413         int ndx;
414
415         for (ndx = -1; (ndx = bitbag_next_bit(delayed_bits, ndx)) >= 0; ) {
416                 struct file_struct *file = cur_flist->files[ndx];
417                 fname = local_name ? local_name : f_name(file, NULL);
418                 if ((partialptr = partial_dir_fname(fname)) != NULL) {
419                         if (make_backups > 0 && !make_backup(fname, False))
420                                 continue;
421                         if (DEBUG_GTE(RECV, 1)) {
422                                 rprintf(FINFO, "renaming %s to %s\n",
423                                         partialptr, fname);
424                         }
425                         /* We don't use robust_rename() here because the
426                          * partial-dir must be on the same drive. */
427                         if (do_rename(partialptr, fname) < 0) {
428                                 rsyserr(FERROR_XFER, errno,
429                                         "rename failed for %s (from %s)",
430                                         full_fname(fname), partialptr);
431                         } else {
432                                 if (remove_source_files
433                                  || (preserve_hard_links && F_IS_HLINKED(file)))
434                                         send_msg_int(MSG_SUCCESS, ndx);
435                                 handle_partial_dir(partialptr, PDIR_DELETE);
436                         }
437                 }
438         }
439 }
440
441 static void no_batched_update(int ndx, BOOL is_redo)
442 {
443         struct file_list *flist = flist_for_ndx(ndx, "no_batched_update");
444         struct file_struct *file = flist->files[ndx - flist->ndx_start];
445
446         rprintf(FERROR_XFER, "(No batched update for%s \"%s\")\n",
447                 is_redo ? " resend of" : "", f_name(file, NULL));
448
449         if (inc_recurse && !dry_run)
450                 send_msg_int(MSG_NO_SEND, ndx);
451 }
452
453 static int we_want_redo(int desired_ndx)
454 {
455         static int redo_ndx = -1;
456
457         while (redo_ndx < desired_ndx) {
458                 if (redo_ndx >= 0)
459                         no_batched_update(redo_ndx, True);
460                 if ((redo_ndx = flist_ndx_pop(&batch_redo_list)) < 0)
461                         return 0;
462         }
463
464         if (redo_ndx == desired_ndx) {
465                 redo_ndx = -1;
466                 return 1;
467         }
468
469         return 0;
470 }
471
472 static int gen_wants_ndx(int desired_ndx, int flist_num)
473 {
474         static int next_ndx = -1;
475         static int done_cnt = 0;
476         static BOOL got_eof = False;
477
478         if (got_eof)
479                 return 0;
480
481         /* TODO: integrate gen-reading I/O into perform_io() so this is not needed? */
482         io_flush(FULL_FLUSH);
483
484         while (next_ndx < desired_ndx) {
485                 if (inc_recurse && flist_num <= done_cnt)
486                         return 0;
487                 if (next_ndx >= 0)
488                         no_batched_update(next_ndx, False);
489                 if ((next_ndx = read_int(batch_gen_fd)) < 0) {
490                         if (inc_recurse) {
491                                 done_cnt++;
492                                 continue;
493                         }
494                         got_eof = True;
495                         return 0;
496                 }
497         }
498
499         if (next_ndx == desired_ndx) {
500                 next_ndx = -1;
501                 return 1;
502         }
503
504         return 0;
505 }
506
507 /**
508  * main routine for receiver process.
509  *
510  * Receiver process runs on the same host as the generator process. */
511 int recv_files(int f_in, int f_out, char *local_name)
512 {
513         int fd1,fd2;
514         STRUCT_STAT st;
515         int iflags, xlen;
516         char *fname, fbuf[MAXPATHLEN];
517         char xname[MAXPATHLEN];
518         char fnametmp[MAXPATHLEN];
519         char *fnamecmp, *partialptr;
520         char fnamecmpbuf[MAXPATHLEN];
521         uchar fnamecmp_type;
522         struct file_struct *file;
523         int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
524         enum logcode log_code = log_before_transfer ? FLOG : FINFO;
525         int max_phase = protocol_version >= 29 ? 2 : 1;
526         int dflt_perms = (ACCESSPERMS & ~orig_umask);
527 #ifdef SUPPORT_ACLS
528         const char *parent_dirname = "";
529 #endif
530         int ndx, recv_ok;
531
532         if (DEBUG_GTE(RECV, 1))
533                 rprintf(FINFO, "recv_files(%d) starting\n", cur_flist->used);
534
535         if (delay_updates)
536                 delayed_bits = bitbag_create(cur_flist->used + 1);
537
538         while (1) {
539                 cleanup_disable();
540
541                 /* This call also sets cur_flist. */
542                 ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
543                                          xname, &xlen);
544                 if (ndx == NDX_DONE) {
545                         if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
546                                 set_current_file_index(NULL, 0);
547                                 end_progress(0);
548                         }
549                         if (inc_recurse && first_flist) {
550                                 if (read_batch) {
551                                         ndx = first_flist->used + first_flist->ndx_start;
552                                         gen_wants_ndx(ndx, first_flist->flist_num);
553                                 }
554                                 flist_free(first_flist);
555                                 if (first_flist)
556                                         continue;
557                         } else if (read_batch && first_flist) {
558                                 ndx = first_flist->used;
559                                 gen_wants_ndx(ndx, first_flist->flist_num);
560                         }
561                         if (++phase > max_phase)
562                                 break;
563                         if (DEBUG_GTE(RECV, 1))
564                                 rprintf(FINFO, "recv_files phase=%d\n", phase);
565                         if (phase == 2 && delay_updates)
566                                 handle_delayed_updates(local_name);
567                         write_int(f_out, NDX_DONE);
568                         continue;
569                 }
570
571                 if (ndx - cur_flist->ndx_start >= 0)
572                         file = cur_flist->files[ndx - cur_flist->ndx_start];
573                 else
574                         file = dir_flist->files[cur_flist->parent_ndx];
575                 fname = local_name ? local_name : f_name(file, fbuf);
576
577                 if (DEBUG_GTE(RECV, 1))
578                         rprintf(FINFO, "recv_files(%s)\n", fname);
579
580                 if (daemon_filter_list.head && (*fname != '.' || fname[1] != '\0')
581                  && check_filter(&daemon_filter_list, FLOG, fname, 0) < 0) {
582                         rprintf(FERROR, "attempt to hack rsync failed.\n");
583                         exit_cleanup(RERR_PROTOCOL);
584                 }
585
586 #ifdef SUPPORT_XATTRS
587                 if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
588                  && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
589                         recv_xattr_request(file, f_in);
590 #endif
591
592                 if (!(iflags & ITEM_TRANSFER)) {
593                         maybe_log_item(file, iflags, itemizing, xname);
594 #ifdef SUPPORT_XATTRS
595                         if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
596                          && !BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
597                                 set_file_attrs(fname, file, NULL, fname, 0);
598 #endif
599                         if (iflags & ITEM_IS_NEW) {
600                                 stats.created_files++;
601                                 if (S_ISREG(file->mode)) {
602                                         /* Nothing further to count. */
603                                 } else if (S_ISDIR(file->mode))
604                                         stats.created_dirs++;
605 #ifdef SUPPORT_LINKS
606                                 else if (S_ISLNK(file->mode))
607                                         stats.created_symlinks++;
608 #endif
609                                 else if (IS_DEVICE(file->mode))
610                                         stats.created_devices++;
611                                 else
612                                         stats.created_specials++;
613                         }
614                         continue;
615                 }
616                 if (phase == 2) {
617                         rprintf(FERROR,
618                                 "got transfer request in phase 2 [%s]\n",
619                                 who_am_i());
620                         exit_cleanup(RERR_PROTOCOL);
621                 }
622
623                 if (file->flags & FLAG_FILE_SENT) {
624                         if (csum_length == SHORT_SUM_LENGTH) {
625                                 if (keep_partial && !partial_dir)
626                                         make_backups = -make_backups; /* prevents double backup */
627                                 if (append_mode)
628                                         sparse_files = -sparse_files;
629                                 append_mode = -append_mode;
630                                 csum_length = SUM_LENGTH;
631                                 redoing = 1;
632                         }
633                 } else {
634                         if (csum_length != SHORT_SUM_LENGTH) {
635                                 if (keep_partial && !partial_dir)
636                                         make_backups = -make_backups;
637                                 if (append_mode)
638                                         sparse_files = -sparse_files;
639                                 append_mode = -append_mode;
640                                 csum_length = SHORT_SUM_LENGTH;
641                                 redoing = 0;
642                         }
643                         if (iflags & ITEM_IS_NEW)
644                                 stats.created_files++;
645                 }
646
647                 if (!am_server && INFO_GTE(PROGRESS, 1))
648                         set_current_file_index(file, ndx);
649                 stats.xferred_files++;
650                 stats.total_transferred_size += F_LENGTH(file);
651
652                 cleanup_got_literal = 0;
653
654                 if (read_batch) {
655                         int wanted = redoing
656                                    ? we_want_redo(ndx)
657                                    : gen_wants_ndx(ndx, cur_flist->flist_num);
658                         if (!wanted) {
659                                 rprintf(FINFO,
660                                         "(Skipping batched update for%s \"%s\")\n",
661                                         redoing ? " resend of" : "",
662                                         fname);
663                                 discard_receive_data(f_in, F_LENGTH(file));
664                                 file->flags |= FLAG_FILE_SENT;
665                                 continue;
666                         }
667                 }
668
669                 remember_initial_stats();
670
671                 if (!do_xfers) { /* log the transfer */
672                         log_item(FCLIENT, file, iflags, NULL);
673                         if (read_batch)
674                                 discard_receive_data(f_in, F_LENGTH(file));
675                         continue;
676                 }
677                 if (write_batch < 0) {
678                         log_item(FCLIENT, file, iflags, NULL);
679                         if (!am_server)
680                                 discard_receive_data(f_in, F_LENGTH(file));
681                         if (inc_recurse)
682                                 send_msg_int(MSG_SUCCESS, ndx);
683                         continue;
684                 }
685
686                 partialptr = partial_dir ? partial_dir_fname(fname) : fname;
687
688                 if (protocol_version >= 29) {
689                         switch (fnamecmp_type) {
690                         case FNAMECMP_FNAME:
691                                 fnamecmp = fname;
692                                 break;
693                         case FNAMECMP_PARTIAL_DIR:
694                                 fnamecmp = partialptr;
695                                 break;
696                         case FNAMECMP_BACKUP:
697                                 fnamecmp = get_backup_name(fname);
698                                 break;
699                         case FNAMECMP_FUZZY:
700                                 if (file->dirname) {
701                                         pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, file->dirname, xname);
702                                         fnamecmp = fnamecmpbuf;
703                                 } else
704                                         fnamecmp = xname;
705                                 break;
706                         default:
707                                 if (fnamecmp_type > FNAMECMP_FUZZY && fnamecmp_type-FNAMECMP_FUZZY <= basis_dir_cnt) {
708                                         fnamecmp_type -= FNAMECMP_FUZZY + 1;
709                                         if (file->dirname) {
710                                                 stringjoin(fnamecmpbuf, sizeof fnamecmpbuf,
711                                                            basis_dir[fnamecmp_type], "/", file->dirname, "/", xname, NULL);
712                                         } else
713                                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], xname);
714                                 } else if (fnamecmp_type >= basis_dir_cnt) {
715                                         rprintf(FERROR,
716                                                 "invalid basis_dir index: %d.\n",
717                                                 fnamecmp_type);
718                                         exit_cleanup(RERR_PROTOCOL);
719                                 } else
720                                         pathjoin(fnamecmpbuf, sizeof fnamecmpbuf, basis_dir[fnamecmp_type], fname);
721                                 fnamecmp = fnamecmpbuf;
722                                 break;
723                         }
724                         if (!fnamecmp || (daemon_filter_list.head
725                           && check_filter(&daemon_filter_list, FLOG, fnamecmp, 0) < 0)) {
726                                 fnamecmp = fname;
727                                 fnamecmp_type = FNAMECMP_FNAME;
728                         }
729                 } else {
730                         /* Reminder: --inplace && --partial-dir are never
731                          * enabled at the same time. */
732                         if (inplace && make_backups > 0) {
733                                 if (!(fnamecmp = get_backup_name(fname)))
734                                         fnamecmp = fname;
735                                 else
736                                         fnamecmp_type = FNAMECMP_BACKUP;
737                         } else if (partial_dir && partialptr)
738                                 fnamecmp = partialptr;
739                         else
740                                 fnamecmp = fname;
741                 }
742
743                 /* open the file */
744                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
745
746                 if (fd1 == -1 && protocol_version < 29) {
747                         if (fnamecmp != fname) {
748                                 fnamecmp = fname;
749                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
750                         }
751
752                         if (fd1 == -1 && basis_dir[0]) {
753                                 /* pre-29 allowed only one alternate basis */
754                                 pathjoin(fnamecmpbuf, sizeof fnamecmpbuf,
755                                          basis_dir[0], fname);
756                                 fnamecmp = fnamecmpbuf;
757                                 fd1 = do_open(fnamecmp, O_RDONLY, 0);
758                         }
759                 }
760
761                 updating_basis_or_equiv = inplace
762                     && (fnamecmp == fname || fnamecmp_type == FNAMECMP_BACKUP);
763
764                 if (fd1 == -1) {
765                         st.st_mode = 0;
766                         st.st_size = 0;
767                 } else if (do_fstat(fd1,&st) != 0) {
768                         rsyserr(FERROR_XFER, errno, "fstat %s failed",
769                                 full_fname(fnamecmp));
770                         discard_receive_data(f_in, F_LENGTH(file));
771                         close(fd1);
772                         if (inc_recurse)
773                                 send_msg_int(MSG_NO_SEND, ndx);
774                         continue;
775                 }
776
777                 if (fd1 != -1 && S_ISDIR(st.st_mode) && fnamecmp == fname) {
778                         /* this special handling for directories
779                          * wouldn't be necessary if robust_rename()
780                          * and the underlying robust_unlink could cope
781                          * with directories
782                          */
783                         rprintf(FERROR_XFER, "recv_files: %s is a directory\n",
784                                 full_fname(fnamecmp));
785                         discard_receive_data(f_in, F_LENGTH(file));
786                         close(fd1);
787                         if (inc_recurse)
788                                 send_msg_int(MSG_NO_SEND, ndx);
789                         continue;
790                 }
791
792                 if (fd1 != -1 && !S_ISREG(st.st_mode)) {
793                         close(fd1);
794                         fd1 = -1;
795                 }
796
797                 /* If we're not preserving permissions, change the file-list's
798                  * mode based on the local permissions and some heuristics. */
799                 if (!preserve_perms) {
800                         int exists = fd1 != -1;
801 #ifdef SUPPORT_ACLS
802                         const char *dn = file->dirname ? file->dirname : ".";
803                         if (parent_dirname != dn
804                          && strcmp(parent_dirname, dn) != 0) {
805                                 dflt_perms = default_perms_for_dir(dn);
806                                 parent_dirname = dn;
807                         }
808 #endif
809                         file->mode = dest_mode(file->mode, st.st_mode,
810                                                dflt_perms, exists);
811                 }
812
813                 /* We now check to see if we are writing the file "inplace" */
814                 if (inplace)  {
815                         fd2 = do_open(fname, O_WRONLY|O_CREAT, 0600);
816                         if (fd2 == -1) {
817                                 rsyserr(FERROR_XFER, errno, "open %s failed",
818                                         full_fname(fname));
819                         } else if (updating_basis_or_equiv)
820                                 cleanup_set(NULL, NULL, file, fd1, fd2);
821                 } else {
822                         fd2 = open_tmpfile(fnametmp, fname, file);
823                         if (fd2 != -1)
824                                 cleanup_set(fnametmp, partialptr, file, fd1, fd2);
825                 }
826
827                 if (fd2 == -1) {
828                         discard_receive_data(f_in, F_LENGTH(file));
829                         if (fd1 != -1)
830                                 close(fd1);
831                         if (inc_recurse)
832                                 send_msg_int(MSG_NO_SEND, ndx);
833                         continue;
834                 }
835
836                 /* log the transfer */
837                 if (log_before_transfer)
838                         log_item(FCLIENT, file, iflags, NULL);
839                 else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
840                         rprintf(FINFO, "%s\n", fname);
841
842                 /* recv file data */
843                 recv_ok = receive_data(f_in, fnamecmp, fd1, st.st_size,
844                                        fname, fd2, F_LENGTH(file));
845
846                 log_item(log_code, file, iflags, NULL);
847
848                 if (fd1 != -1)
849                         close(fd1);
850                 if (close(fd2) < 0) {
851                         rsyserr(FERROR, errno, "close failed on %s",
852                                 full_fname(fnametmp));
853                         exit_cleanup(RERR_FILEIO);
854                 }
855
856                 if ((recv_ok && (!delay_updates || !partialptr)) || inplace) {
857                         if (partialptr == fname)
858                                 partialptr = NULL;
859                         if (!finish_transfer(fname, fnametmp, fnamecmp,
860                                              partialptr, file, recv_ok, 1))
861                                 recv_ok = -1;
862                         else if (fnamecmp == partialptr) {
863                                 do_unlink(partialptr);
864                                 handle_partial_dir(partialptr, PDIR_DELETE);
865                         }
866                 } else if (keep_partial && partialptr) {
867                         if (!handle_partial_dir(partialptr, PDIR_CREATE)) {
868                                 rprintf(FERROR,
869                                     "Unable to create partial-dir for %s -- discarding %s.\n",
870                                     local_name ? local_name : f_name(file, NULL),
871                                     recv_ok ? "completed file" : "partial file");
872                                 do_unlink(fnametmp);
873                                 recv_ok = -1;
874                         } else if (!finish_transfer(partialptr, fnametmp, fnamecmp, NULL,
875                                                     file, recv_ok, !partial_dir))
876                                 recv_ok = -1;
877                         else if (delay_updates && recv_ok) {
878                                 bitbag_set_bit(delayed_bits, ndx);
879                                 recv_ok = 2;
880                         } else
881                                 partialptr = NULL;
882                 } else
883                         do_unlink(fnametmp);
884
885                 cleanup_disable();
886
887                 if (read_batch)
888                         file->flags |= FLAG_FILE_SENT;
889
890                 switch (recv_ok) {
891                 case 2:
892                         break;
893                 case 1:
894                         if (remove_source_files || inc_recurse
895                          || (preserve_hard_links && F_IS_HLINKED(file)))
896                                 send_msg_int(MSG_SUCCESS, ndx);
897                         break;
898                 case 0: {
899                         enum logcode msgtype = redoing ? FERROR_XFER : FWARNING;
900                         if (msgtype == FERROR_XFER || INFO_GTE(NAME, 1)) {
901                                 char *errstr, *redostr, *keptstr;
902                                 if (!(keep_partial && partialptr) && !inplace)
903                                         keptstr = "discarded";
904                                 else if (partial_dir)
905                                         keptstr = "put into partial-dir";
906                                 else
907                                         keptstr = "retained";
908                                 if (msgtype == FERROR_XFER) {
909                                         errstr = "ERROR";
910                                         redostr = "";
911                                 } else {
912                                         errstr = "WARNING";
913                                         redostr = read_batch ? " (may try again)"
914                                                              : " (will try again)";
915                                 }
916                                 rprintf(msgtype,
917                                         "%s: %s failed verification -- update %s%s.\n",
918                                         errstr, local_name ? f_name(file, NULL) : fname,
919                                         keptstr, redostr);
920                         }
921                         if (!redoing) {
922                                 if (read_batch)
923                                         flist_ndx_push(&batch_redo_list, ndx);
924                                 send_msg_int(MSG_REDO, ndx);
925                                 file->flags |= FLAG_FILE_SENT;
926                         } else if (inc_recurse)
927                                 send_msg_int(MSG_NO_SEND, ndx);
928                         break;
929                     }
930                 case -1:
931                         if (inc_recurse)
932                                 send_msg_int(MSG_NO_SEND, ndx);
933                         break;
934                 }
935         }
936         if (make_backups < 0)
937                 make_backups = -make_backups;
938
939         if (phase == 2 && delay_updates) /* for protocol_version < 29 */
940                 handle_delayed_updates(local_name);
941
942         if (DEBUG_GTE(RECV, 1))
943                 rprintf(FINFO,"recv_files finished\n");
944
945         return 0;
946 }