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) 2003-2020 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 write_devices;
  43 extern int preserve_specials;
  44 extern int preserve_hard_links;
  45 extern int preserve_executability;
  46 extern int preserve_perms;
  47 extern int preserve_times;
  48 extern int delete_mode;
  49 extern int delete_before;
  50 extern int delete_during;
  51 extern int delete_after;
  52 extern int missing_args;
  53 extern int msgdone_cnt;
  54 extern int ignore_errors;
  55 extern int remove_source_files;
  56 extern int delay_updates;
  57 extern int update_only;
  58 extern int human_readable;
  59 extern int ignore_existing;
  60 extern int ignore_non_existing;
  61 extern int want_xattr_optim;
  62 extern int inplace;
  63 extern int append_mode;
  64 extern int make_backups;
  65 extern int csum_length;
  66 extern int ignore_times;
  67 extern int size_only;
  68 extern OFF_T max_size;
  69 extern OFF_T min_size;
  70 extern int io_error;
  71 extern int flist_eof;
  72 extern int allowed_lull;
  73 extern int sock_f_out;
  74 extern int protocol_version;
  75 extern int file_total;
  76 extern int fuzzy_basis;
  77 extern int always_checksum;
  78 extern int flist_csum_len;
  79 extern char *partial_dir;
  80 extern int compare_dest;
  81 extern int copy_dest;
  82 extern int link_dest;
  83 extern int whole_file;
  84 extern int list_only;
  85 extern int read_batch;
  86 extern int write_batch;
  87 extern int safe_symlinks;
  88 extern long block_size; /* "long" because popt can't set an int32. */
  89 extern int unsort_ndx;
  90 extern int max_delete;
  91 extern int force_delete;
  92 extern int one_file_system;
  93 extern int skipped_deletes;
  94 extern dev_t filesystem_dev;
  95 extern mode_t orig_umask;
  96 extern uid_t our_uid;
  97 extern char *tmpdir;
  98 extern char *basis_dir[MAX_BASIS_DIRS+1];
  99 extern struct file_list *cur_flist, *first_flist, *dir_flist;
 100 extern filter_rule_list filter_list, daemon_filter_list;
 101
 102 int maybe_ATTRS_REPORT = 0;
 103 int maybe_ATTRS_SET_NANO = 0;
 104
 105 static dev_t dev_zero;
 106 static int deldelay_size = 0, deldelay_cnt = 0;
 107 static char *deldelay_buf = NULL;
 108 static int deldelay_fd = -1;
 109 static int loopchk_limit;
 110 static int dir_tweaking;
 111 static int symlink_timeset_failed_flags;
 112 static int need_retouch_dir_times;
 113 static int need_retouch_dir_perms;
 114 static const char *solo_file = NULL;
 115
 116 enum nonregtype {
 117         TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 118 };
 119
 120 /* Forward declarations. */
 121 #ifdef SUPPORT_HARD_LINKS
 122 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 123                                  enum logcode code, int f_out);
 124 #endif
 125
 126 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
 127 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
 128
 129 static int start_delete_delay_temp(void)
 130 {
 131         char fnametmp[MAXPATHLEN];
 132         int save_dry_run = dry_run;
 133
 134         dry_run = 0;
 135         if (!get_tmpname(fnametmp, "deldelay", False)
 136          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 137                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 138                         inc_recurse ? "" : " -- switching to --delete-after");
 139                 delete_during = 0;
 140                 delete_after = !inc_recurse;
 141                 dry_run = save_dry_run;
 142                 return 0;
 143         }
 144         unlink(fnametmp);
 145         dry_run = save_dry_run;
 146         return 1;
 147 }
 148
 149 static int flush_delete_delay(void)
 150 {
 151         if (deldelay_fd < 0 && !start_delete_delay_temp())
 152                 return 0;
 153         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 154                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 155                 delete_during = 0;
 156                 delete_after = !inc_recurse;
 157                 close(deldelay_fd);
 158                 return 0;
 159         }
 160         deldelay_cnt = 0;
 161         return 1;
 162 }
 163
 164 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 165 {
 166         int len;
 167
 168         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 169                 return 0;
 170
 171         if (flags & DEL_NO_UID_WRITE)
 172                 deldelay_buf[deldelay_cnt++] = '!';
 173
 174         while (1) {
 175                 len = snprintf(deldelay_buf + deldelay_cnt,
 176                                deldelay_size - deldelay_cnt,
 177                                "%x %s%c",
 178                                (int)file->mode, fname, '\0');
 179                 if ((deldelay_cnt += len) <= deldelay_size)
 180                         break;
 181                 deldelay_cnt -= len;
 182                 if (!flush_delete_delay())
 183                         return 0;
 184         }
 185
 186         return 1;
 187 }
 188
 189 static int read_delay_line(char *buf, int *flags_p)
 190 {
 191         static int read_pos = 0;
 192         int j, len, mode;
 193         char *bp, *past_space;
 194
 195         while (1) {
 196                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 197                 if (j < deldelay_cnt)
 198                         break;
 199                 if (deldelay_fd < 0) {
 200                         if (j > read_pos)
 201                                 goto invalid_data;
 202                         return -1;
 203                 }
 204                 deldelay_cnt -= read_pos;
 205                 if (deldelay_cnt == deldelay_size)
 206                         goto invalid_data;
 207                 if (deldelay_cnt && read_pos) {
 208                         memmove(deldelay_buf, deldelay_buf + read_pos,
 209                                 deldelay_cnt);
 210                 }
 211                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 212                            deldelay_size - deldelay_cnt);
 213                 if (len == 0) {
 214                         if (deldelay_cnt) {
 215                                 rprintf(FERROR,
 216                                     "ERROR: unexpected EOF in delete-delay file.\n");
 217                         }
 218                         return -1;
 219                 }
 220                 if (len < 0) {
 221                         rsyserr(FERROR, errno,
 222                                 "reading delete-delay file");
 223                         return -1;
 224                 }
 225                 deldelay_cnt += len;
 226                 read_pos = 0;
 227         }
 228
 229         bp = deldelay_buf + read_pos;
 230         if (*bp == '!') {
 231                 bp++;
 232                 *flags_p = DEL_NO_UID_WRITE;
 233         } else
 234                 *flags_p = 0;
 235
 236         if (sscanf(bp, "%x ", &mode) != 1) {
 237           invalid_data:
 238                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 239                 return -1;
 240         }
 241         past_space = strchr(bp, ' ') + 1;
 242         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 243         read_pos = j + 1;
 244
 245         if (len > MAXPATHLEN) {
 246                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 247                 return -1;
 248         }
 249
 250         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 251          * instead of returning a pointer to our buffer. */
 252         memcpy(buf, past_space, len);
 253
 254         return mode;
 255 }
 256
 257 static void do_delayed_deletions(char *delbuf)
 258 {
 259         int mode, flags;
 260
 261         if (deldelay_fd >= 0) {
 262                 if (deldelay_cnt && !flush_delete_delay())
 263                         return;
 264                 lseek(deldelay_fd, 0, 0);
 265         }
 266         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 267                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 268         if (deldelay_fd >= 0)
 269                 close(deldelay_fd);
 270 }
 271
 272 /* This function is used to implement per-directory deletion, and is used by
 273  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 274  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 275  * call will append names onto the end, but the old dir value will be restored
 276  * on exit). */
 277 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 278 {
 279         static int already_warned = 0;
 280         struct file_list *dirlist;
 281         char delbuf[MAXPATHLEN];
 282         int dlen, i;
 283
 284         if (!fbuf) {
 285                 change_local_filter_dir(NULL, 0, 0);
 286                 return;
 287         }
 288
 289         if (DEBUG_GTE(DEL, 2))
 290                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 291
 292         if (allowed_lull)
 293                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
 294
 295         if (io_error & IOERR_GENERAL && !ignore_errors) {
 296                 if (already_warned)
 297                         return;
 298                 rprintf(FINFO,
 299                         "IO error encountered -- skipping file deletion\n");
 300                 already_warned = 1;
 301                 return;
 302         }
 303
 304         dlen = strlen(fbuf);
 305         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 306
 307         if (one_file_system) {
 308                 if (file->flags & FLAG_TOP_DIR)
 309                         filesystem_dev = *fs_dev;
 310                 else if (filesystem_dev != *fs_dev)
 311                         return;
 312         }
 313
 314         dirlist = get_dirlist(fbuf, dlen, 0);
 315
 316         /* If an item in dirlist is not found in flist, delete it
 317          * from the filesystem. */
 318         for (i = dirlist->used; i--; ) {
 319                 struct file_struct *fp = dirlist->files[i];
 320                 if (!F_IS_ACTIVE(fp))
 321                         continue;
 322                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 323                         if (INFO_GTE(MOUNT, 1))
 324                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 325                                         f_name(fp, NULL));
 326                         continue;
 327                 }
 328                 /* Here we want to match regardless of file type.  Replacement
 329                  * of a file with one of another type is handled separately by
 330                  * a delete_item call with a DEL_MAKE_ROOM flag. */
 331                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
 332                         int flags = DEL_RECURSE;
 333                         if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
 334                                 flags |= DEL_NO_UID_WRITE;
 335                         f_name(fp, delbuf);
 336                         if (delete_during == 2) {
 337                                 if (!remember_delete(fp, delbuf, flags))
 338                                         break;
 339                         } else
 340                                 delete_item(delbuf, fp->mode, flags);
 341                 }
 342         }
 343
 344         flist_free(dirlist);
 345 }
 346
 347 /* This deletes any files on the receiving side that are not present on the
 348  * sending side.  This is used by --delete-before and --delete-after. */
 349 static void do_delete_pass(void)
 350 {
 351         char fbuf[MAXPATHLEN];
 352         STRUCT_STAT st;
 353         int j;
 354
 355         /* dry_run is incremented when the destination doesn't exist yet. */
 356         if (dry_run > 1 || list_only)
 357                 return;
 358
 359         for (j = 0; j < cur_flist->used; j++) {
 360                 struct file_struct *file = cur_flist->sorted[j];
 361
 362                 if (!F_IS_ACTIVE(file))
 363                         continue;
 364
 365                 f_name(file, fbuf);
 366
 367                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 368                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 369                         continue;
 370                 }
 371
 372                 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
 373                         rprintf(FINFO, "deleting in %s\n", fbuf);
 374
 375                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 376                  || !S_ISDIR(st.st_mode))
 377                         continue;
 378
 379                 delete_in_dir(fbuf, file, &st.st_dev);
 380         }
 381         delete_in_dir(NULL, NULL, &dev_zero);
 382
 383         if (INFO_GTE(FLIST, 2) && !am_server)
 384                 rprintf(FINFO, "                    \r");
 385 }
 386
 387 static inline int time_diff(STRUCT_STAT *stp, struct file_struct *file)
 388 {
 389 #ifdef ST_MTIME_NSEC
 390         return cmp_time(stp->st_mtime, stp->ST_MTIME_NSEC, file->modtime, F_MOD_NSEC_or_0(file));
 391 #else
 392         return cmp_time(stp->st_mtime, 0L, file->modtime, 0L);
 393 #endif
 394 }
 395
 396 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
 397 {
 398         if (preserve_perms)
 399                 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
 400
 401         if (preserve_executability)
 402                 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
 403
 404         return 0;
 405 }
 406
 407 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
 408 {
 409         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 410                 return 1;
 411
 412         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 413                 return 1;
 414
 415         return 0;
 416 }
 417
 418 #ifdef SUPPORT_ACLS
 419 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 420 {
 421         if (preserve_acls) {
 422                 if (!ACL_READY(*sxp))
 423                         get_acl(fname, sxp);
 424                 if (set_acl(NULL, file, sxp, file->mode))
 425                         return 1;
 426         }
 427
 428         return 0;
 429 }
 430 #endif
 431
 432 #ifdef SUPPORT_XATTRS
 433 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 434 {
 435         if (preserve_xattrs) {
 436                 if (!XATTR_READY(*sxp))
 437                         get_xattr(fname, sxp);
 438                 if (xattr_diff(file, sxp, 0))
 439                         return 1;
 440         }
 441
 442         return 0;
 443 }
 444 #endif
 445
 446 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 447 {
 448         if (S_ISLNK(file->mode)) {
 449 #ifdef CAN_SET_SYMLINK_TIMES
 450                 if (preserve_times & PRESERVE_LINK_TIMES && time_diff(&sxp->st, file))
 451                         return 0;
 452 #endif
 453 #ifdef CAN_CHMOD_SYMLINK
 454                 if (perms_differ(file, sxp))
 455                         return 0;
 456 #endif
 457 #ifdef CAN_CHOWN_SYMLINK
 458                 if (ownership_differs(file, sxp))
 459                         return 0;
 460 #endif
 461 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
 462                 if (acls_differ(fname, file, sxp))
 463                         return 0;
 464 #endif
 465 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
 466                 if (xattrs_differ(fname, file, sxp))
 467                         return 0;
 468 #endif
 469         } else {
 470                 if (preserve_times && time_diff(&sxp->st, file))
 471                         return 0;
 472                 if (perms_differ(file, sxp))
 473                         return 0;
 474                 if (ownership_differs(file, sxp))
 475                         return 0;
 476 #ifdef SUPPORT_ACLS
 477                 if (acls_differ(fname, file, sxp))
 478                         return 0;
 479 #endif
 480 #ifdef SUPPORT_XATTRS
 481                 if (xattrs_differ(fname, file, sxp))
 482                         return 0;
 483 #endif
 484         }
 485
 486         return 1;
 487 }
 488
 489 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 490              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 491              const char *xname)
 492 {
 493         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 494                 int keep_time = !preserve_times ? 0
 495                     : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
 496                     : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
 497                     : 1;
 498
 499                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 500                         iflags |= ITEM_REPORT_SIZE;
 501                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 502                         if (iflags & ITEM_LOCAL_CHANGE)
 503                                 iflags |= symlink_timeset_failed_flags;
 504                 } else if (keep_time
 505                  ? time_diff(&sxp->st, file)
 506                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 507                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 508                         iflags |= ITEM_REPORT_TIME;
 509                 if (atimes_ndx && !S_ISDIR(file->mode) && !S_ISLNK(file->mode)
 510                  && cmp_time(F_ATIME(file), 0, sxp->st.st_atime, 0) != 0)
 511                         iflags |= ITEM_REPORT_ATIME;
 512 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 513                 if (S_ISLNK(file->mode)) {
 514                         ;
 515                 } else
 516 #endif
 517                 if (preserve_perms) {
 518                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 519                                 iflags |= ITEM_REPORT_PERMS;
 520                 } else if (preserve_executability
 521                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 522                         iflags |= ITEM_REPORT_PERMS;
 523                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 524                         iflags |= ITEM_REPORT_OWNER;
 525                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 526                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 527                         iflags |= ITEM_REPORT_GROUP;
 528 #ifdef SUPPORT_ACLS
 529                 if (preserve_acls && !S_ISLNK(file->mode)) {
 530                         if (!ACL_READY(*sxp))
 531                                 get_acl(fnamecmp, sxp);
 532                         if (set_acl(NULL, file, sxp, file->mode))
 533                                 iflags |= ITEM_REPORT_ACL;
 534                 }
 535 #endif
 536 #ifdef SUPPORT_XATTRS
 537                 if (preserve_xattrs) {
 538                         if (!XATTR_READY(*sxp))
 539                                 get_xattr(fnamecmp, sxp);
 540                         if (xattr_diff(file, sxp, 1))
 541                                 iflags |= ITEM_REPORT_XATTR;
 542                 }
 543 #endif
 544         } else {
 545 #ifdef SUPPORT_XATTRS
 546                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 547                         iflags |= ITEM_REPORT_XATTR;
 548 #endif
 549                 iflags |= ITEM_IS_NEW;
 550         }
 551
 552         iflags &= 0xffff;
 553         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
 554           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 555                 if (protocol_version >= 29) {
 556                         if (ndx >= 0)
 557                                 write_ndx(sock_f_out, ndx);
 558                         write_shortint(sock_f_out, iflags);
 559                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 560                                 write_byte(sock_f_out, fnamecmp_type);
 561                         if (iflags & ITEM_XNAME_FOLLOWS)
 562                                 write_vstring(sock_f_out, xname, strlen(xname));
 563 #ifdef SUPPORT_XATTRS
 564                         if (preserve_xattrs && do_xfers
 565                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 566                                 int fd = iflags & ITEM_REPORT_XATTR
 567                                       && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
 568                                        ? sock_f_out : -1;
 569                                 send_xattr_request(NULL, file, fd);
 570                         }
 571 #endif
 572                 } else if (ndx >= 0) {
 573                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 574                         log_item(code, file, iflags, xname);
 575                 }
 576         }
 577 }
 578
 579
 580 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 581 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 582 {
 583         if (st->st_size != F_LENGTH(file))
 584                 return 0;
 585
 586         /* if always checksum is set then we use the checksum instead
 587            of the file time to determine whether to sync */
 588         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 589                 char sum[MAX_DIGEST_LEN];
 590                 file_checksum(fn, st, sum);
 591                 return memcmp(sum, F_SUM(file), flist_csum_len) == 0;
 592         }
 593
 594         if (size_only > 0)
 595                 return 1;
 596
 597         if (ignore_times)
 598                 return 0;
 599
 600         return time_diff(st, file) == 0;
 601 }
 602
 603
 604 /*
 605  * set (initialize) the size entries in the per-file sum_struct
 606  * calculating dynamic block and checksum sizes.
 607  *
 608  * This is only called from generate_and_send_sums() but is a separate
 609  * function to encapsulate the logic.
 610  *
 611  * The block size is a rounded square root of file length.
 612  *
 613  * The checksum size is determined according to:
 614  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 615  * provided by Donovan Baarda which gives a probability of rsync
 616  * algorithm corrupting data and falling back using the whole md4
 617  * checksums.
 618  *
 619  * This might be made one of several selectable heuristics.
 620  */
 621 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 622 {
 623         int32 blength;
 624         int s2length;
 625         int64 l;
 626
 627         if (len < 0) {
 628                 /* The file length overflowed our int64 var, so we can't process this file. */
 629                 sum->count = -1; /* indicate overflow error */
 630                 return;
 631         }
 632
 633         if (block_size)
 634                 blength = block_size;
 635         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 636                 blength = BLOCK_SIZE;
 637         else {
 638                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 639                 int32 c;
 640                 int cnt;
 641                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 642                 if (c < 0 || c >= max_blength)
 643                         blength = max_blength;
 644                 else {
 645                     blength = 0;
 646                     do {
 647                             blength |= c;
 648                             if (len < (int64)blength * blength)
 649                                     blength &= ~c;
 650                             c >>= 1;
 651                     } while (c >= 8);   /* round to multiple of 8 */
 652                     blength = MAX(blength, BLOCK_SIZE);
 653                 }
 654         }
 655
 656         if (protocol_version < 27) {
 657                 s2length = csum_length;
 658         } else if (csum_length == SUM_LENGTH) {
 659                 s2length = SUM_LENGTH;
 660         } else {
 661                 int32 c;
 662                 int b = BLOCKSUM_BIAS;
 663                 for (l = len; l >>= 1; b += 2) {}
 664                 for (c = blength; (c >>= 1) && b; b--) {}
 665                 /* add a bit, subtract rollsum, round up. */
 666                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 667                 s2length = MAX(s2length, csum_length);
 668                 s2length = MIN(s2length, SUM_LENGTH);
 669         }
 670
 671         sum->flength    = len;
 672         sum->blength    = blength;
 673         sum->s2length   = s2length;
 674         sum->remainder  = (int32)(len % blength);
 675         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 676
 677         if ((int64)sum->count != l)
 678                 sum->count = -1;
 679
 680         if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
 681                 rprintf(FINFO,
 682                         "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
 683                         big_num(sum->count), (long)sum->remainder, (long)sum->blength,
 684                         sum->s2length, big_num(sum->flength));
 685         }
 686 }
 687
 688
 689 /*
 690  * Generate and send a stream of signatures/checksums that describe a buffer
 691  *
 692  * Generate approximately one checksum every block_len bytes.
 693  */
 694 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 695 {
 696         int32 i;
 697         struct map_struct *mapbuf;
 698         struct sum_struct sum;
 699         OFF_T offset = 0;
 700
 701         sum_sizes_sqroot(&sum, len);
 702         if (sum.count < 0)
 703                 return -1;
 704         write_sum_head(f_out, &sum);
 705
 706         if (append_mode > 0 && f_copy < 0)
 707                 return 0;
 708
 709         if (len > 0)
 710                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 711         else
 712                 mapbuf = NULL;
 713
 714         for (i = 0; i < sum.count; i++) {
 715                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 716                 char *map = map_ptr(mapbuf, offset, n1);
 717                 char sum2[SUM_LENGTH];
 718                 uint32 sum1;
 719
 720                 len -= n1;
 721                 offset += n1;
 722
 723                 if (f_copy >= 0) {
 724                         full_write(f_copy, map, n1);
 725                         if (append_mode > 0)
 726                                 continue;
 727                 }
 728
 729                 sum1 = get_checksum1(map, n1);
 730                 get_checksum2(map, n1, sum2);
 731
 732                 if (DEBUG_GTE(DELTASUM, 3)) {
 733                         rprintf(FINFO,
 734                                 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
 735                                 big_num(i), big_num(offset - n1), (long)n1,
 736                                 (unsigned long)sum1);
 737                 }
 738                 write_int(f_out, sum1);
 739                 write_buf(f_out, sum2, sum.s2length);
 740         }
 741
 742         if (mapbuf)
 743                 unmap_file(mapbuf);
 744
 745         return 0;
 746 }
 747
 748
 749 /* Try to find a filename in the same dir as "fname" with a similar name. */
 750 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
 751 {
 752         int fname_len, fname_suf_len;
 753         const char *fname_suf, *fname = file->basename;
 754         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 755         int i, j;
 756         struct file_struct *lowest_fp = NULL;
 757
 758         fname_len = strlen(fname);
 759         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 760
 761         /* Try to find an exact size+mtime match first. */
 762         for (i = 0; i < fuzzy_basis; i++) {
 763                 struct file_list *dirlist = dirlist_array[i];
 764
 765                 if (!dirlist)
 766                         continue;
 767
 768                 for (j = 0; j < dirlist->used; j++) {
 769                         struct file_struct *fp = dirlist->files[j];
 770
 771                         if (!F_IS_ACTIVE(fp))
 772                                 continue;
 773
 774                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 775                                 continue;
 776
 777                         if (F_LENGTH(fp) == F_LENGTH(file) && cmp_time(fp->modtime, 0L, file->modtime, 0L) == 0) {
 778                                 if (DEBUG_GTE(FUZZY, 2))
 779                                         rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
 780                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 781                                 return fp;
 782                         }
 783
 784                 }
 785         }
 786
 787         for (i = 0; i < fuzzy_basis; i++) {
 788                 struct file_list *dirlist = dirlist_array[i];
 789
 790                 if (!dirlist)
 791                         continue;
 792
 793                 for (j = 0; j < dirlist->used; j++) {
 794                         struct file_struct *fp = dirlist->files[j];
 795                         const char *suf, *name;
 796                         int len, suf_len;
 797                         uint32 dist;
 798
 799                         if (!F_IS_ACTIVE(fp))
 800                                 continue;
 801
 802                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 803                                 continue;
 804
 805                         name = fp->basename;
 806                         len = strlen(name);
 807                         suf = find_filename_suffix(name, len, &suf_len);
 808
 809                         dist = fuzzy_distance(name, len, fname, fname_len);
 810                         /* Add some extra weight to how well the suffixes match. */
 811                         dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
 812                         if (DEBUG_GTE(FUZZY, 2)) {
 813                                 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 814                                         f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
 815                         }
 816                         if (dist <= lowest_dist) {
 817                                 lowest_dist = dist;
 818                                 lowest_fp = fp;
 819                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 820                         }
 821                 }
 822         }
 823
 824         return lowest_fp;
 825 }
 826
 827 /* Copy a file found in our --copy-dest handling. */
 828 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 829 {
 830         char buf[MAXPATHLEN];
 831         const char *copy_to, *partialptr;
 832         int save_preserve_xattrs = preserve_xattrs;
 833         int ok, fd_w;
 834
 835         if (inplace) {
 836                 /* Let copy_file open the destination in place. */
 837                 fd_w = -1;
 838                 copy_to = dest;
 839         } else {
 840                 fd_w = open_tmpfile(buf, dest, file);
 841                 if (fd_w < 0)
 842                         return -1;
 843                 copy_to = buf;
 844         }
 845         cleanup_set(copy_to, NULL, NULL, -1, -1);
 846         if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
 847                 if (INFO_GTE(COPY, 1)) {
 848                         rsyserr(FINFO, errno, "copy_file %s => %s",
 849                                 full_fname(src), copy_to);
 850                 }
 851                 /* Try to clean up. */
 852                 unlink(copy_to);
 853                 cleanup_disable();
 854                 return -1;
 855         }
 856         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 857         preserve_xattrs = 0; /* xattrs were copied with file */
 858         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 859         preserve_xattrs = save_preserve_xattrs;
 860         cleanup_disable();
 861         return ok ? 0 : -1;
 862 }
 863
 864 /* This is only called for regular files.  We return -2 if we've finished
 865  * handling the file, -1 if no dest-linking occurred, or a non-negative
 866  * value if we found an alternate basis file.  If we're called with the
 867  * find_exact_for_existing flag, the destination file already exists, so
 868  * we only try to find an exact alt-dest match.  In this case, the returns
 869  * are only -2 & -1 (both as above). */
 870 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 871                          char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
 872                          int itemizing, enum logcode code)
 873 {
 874         STRUCT_STAT real_st = sxp->st;
 875         int best_match = -1;
 876         int match_level = 0;
 877         int j = 0;
 878
 879         do {
 880                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 881                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 882                         continue;
 883                 if (match_level == 0) {
 884                         best_match = j;
 885                         match_level = 1;
 886                 }
 887                 if (!unchanged_file(cmpbuf, file, &sxp->st))
 888                         continue;
 889                 if (match_level == 1) {
 890                         best_match = j;
 891                         match_level = 2;
 892                 }
 893                 if (unchanged_attrs(cmpbuf, file, sxp)) {
 894                         best_match = j;
 895                         match_level = 3;
 896                         break;
 897                 }
 898                 free_stat_x(sxp);
 899         } while (basis_dir[++j] != NULL);
 900
 901         if (!match_level)
 902                 goto got_nothing_for_ya;
 903
 904         if (j != best_match) {
 905                 j = best_match;
 906                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 907                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 908                         goto got_nothing_for_ya;
 909         }
 910
 911         if (match_level == 3 && !copy_dest) {
 912                 if (find_exact_for_existing) {
 913                         if (link_dest && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
 914                                 return -1;
 915                         if (do_unlink(fname) < 0 && errno != ENOENT)
 916                                 goto got_nothing_for_ya;
 917                 }
 918 #ifdef SUPPORT_HARD_LINKS
 919                 if (link_dest) {
 920                         if (!hard_link_one(file, fname, cmpbuf, 1))
 921                                 goto try_a_copy;
 922                         if (atimes_ndx)
 923                                 set_file_attrs(fname, file, sxp, NULL, 0);
 924                         if (preserve_hard_links && F_IS_HLINKED(file))
 925                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 926                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
 927                                 itemize(cmpbuf, file, ndx, 1, sxp,
 928                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 929                                         0, "");
 930                         }
 931                 } else
 932 #endif
 933                 {
 934                         if (itemizing)
 935                                 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
 936                 }
 937                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
 938                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 939                 return -2;
 940         }
 941
 942         if (find_exact_for_existing)
 943                 goto got_nothing_for_ya;
 944
 945         if (match_level >= 2) {
 946 #ifdef SUPPORT_HARD_LINKS
 947           try_a_copy: /* Copy the file locally. */
 948 #endif
 949                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
 950                         if (find_exact_for_existing) /* Can get here via hard-link failure */
 951                                 goto got_nothing_for_ya;
 952                         return -1;
 953                 }
 954                 if (itemizing)
 955                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
 956                 if (maybe_ATTRS_REPORT
 957                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
 958                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
 959                         code = match_level == 3 ? FCLIENT : FINFO;
 960                         rprintf(code, "%s%s\n", fname,
 961                                 match_level == 3 ? " is uptodate" : "");
 962                 }
 963 #ifdef SUPPORT_HARD_LINKS
 964                 if (preserve_hard_links && F_IS_HLINKED(file))
 965                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
 966 #endif
 967                 return -2;
 968         }
 969
 970         return FNAMECMP_BASIS_DIR_LOW + j;
 971
 972 got_nothing_for_ya:
 973         sxp->st = real_st;
 974         return -1;
 975 }
 976
 977 /* This is only called for non-regular files.  We return -2 if we've finished
 978  * handling the file, or -1 if no dest-linking occurred, or a non-negative
 979  * value if we found an alternate basis file. */
 980 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 981                          char *cmpbuf, stat_x *sxp, int itemizing,
 982                          enum logcode code)
 983 {
 984         int best_match = -1;
 985         int match_level = 0;
 986         enum nonregtype type;
 987         uint32 *devp;
 988 #ifdef SUPPORT_LINKS
 989         char lnk[MAXPATHLEN];
 990         int len;
 991 #endif
 992         int j = 0;
 993
 994 #ifndef SUPPORT_LINKS
 995         if (S_ISLNK(file->mode))
 996                 return -1;
 997 #endif
 998         if (S_ISDIR(file->mode)) {
 999                 type = TYPE_DIR;
1000         } else if (IS_SPECIAL(file->mode))
1001                 type = TYPE_SPECIAL;
1002         else if (IS_DEVICE(file->mode))
1003                 type = TYPE_DEVICE;
1004 #ifdef SUPPORT_LINKS
1005         else if (S_ISLNK(file->mode))
1006                 type = TYPE_SYMLINK;
1007 #endif
1008         else {
1009                 rprintf(FERROR,
1010                         "internal: try_dests_non() called with invalid mode (%o)\n",
1011                         (int)file->mode);
1012                 exit_cleanup(RERR_UNSUPPORTED);
1013         }
1014
1015         do {
1016                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1017                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1018                         continue;
1019                 switch (type) {
1020                 case TYPE_DIR:
1021                         if (!S_ISDIR(sxp->st.st_mode))
1022                                 continue;
1023                         break;
1024                 case TYPE_SPECIAL:
1025                         if (!IS_SPECIAL(sxp->st.st_mode))
1026                                 continue;
1027                         break;
1028                 case TYPE_DEVICE:
1029                         if (!IS_DEVICE(sxp->st.st_mode))
1030                                 continue;
1031                         break;
1032                 case TYPE_SYMLINK:
1033 #ifdef SUPPORT_LINKS
1034                         if (!S_ISLNK(sxp->st.st_mode))
1035                                 continue;
1036                         break;
1037 #else
1038                         return -1;
1039 #endif
1040                 }
1041                 if (match_level < 1) {
1042                         match_level = 1;
1043                         best_match = j;
1044                 }
1045                 switch (type) {
1046                 case TYPE_DIR:
1047                 case TYPE_SPECIAL:
1048                         break;
1049                 case TYPE_DEVICE:
1050                         devp = F_RDEV_P(file);
1051                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1052                                 continue;
1053                         break;
1054                 case TYPE_SYMLINK:
1055 #ifdef SUPPORT_LINKS
1056                         if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1057                                 continue;
1058                         lnk[len] = '\0';
1059                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1060                                 continue;
1061                         break;
1062 #else
1063                         return -1;
1064 #endif
1065                 }
1066                 if (match_level < 2) {
1067                         match_level = 2;
1068                         best_match = j;
1069                 }
1070                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1071                         match_level = 3;
1072                         best_match = j;
1073                         break;
1074                 }
1075         } while (basis_dir[++j] != NULL);
1076
1077         if (!match_level)
1078                 return -1;
1079
1080         if (j != best_match) {
1081                 j = best_match;
1082                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1083                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1084                         return -1;
1085         }
1086
1087         if (match_level == 3) {
1088 #ifdef SUPPORT_HARD_LINKS
1089                 if (link_dest
1090 #ifndef CAN_HARDLINK_SYMLINK
1091                  && !S_ISLNK(file->mode)
1092 #endif
1093 #ifndef CAN_HARDLINK_SPECIAL
1094                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1095 #endif
1096                  && !S_ISDIR(file->mode)) {
1097                         if (do_link(cmpbuf, fname) < 0) {
1098                                 rsyserr(FERROR_XFER, errno,
1099                                         "failed to hard-link %s with %s",
1100                                         cmpbuf, fname);
1101                                 return j;
1102                         }
1103                         if (preserve_hard_links && F_IS_HLINKED(file))
1104                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1105                 } else
1106 #endif
1107                         match_level = 2;
1108                 if (itemizing && stdout_format_has_i
1109                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1110                         int chg = compare_dest && type != TYPE_DIR ? 0
1111                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1112                         char *lp = match_level == 3 ? "" : NULL;
1113                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1114                 }
1115                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1116                         rprintf(FCLIENT, "%s%s is uptodate\n",
1117                                 fname, type == TYPE_DIR ? "/" : "");
1118                 }
1119                 return -2;
1120         }
1121
1122         return j;
1123 }
1124
1125 static void list_file_entry(struct file_struct *f)
1126 {
1127         char permbuf[PERMSTRING_SIZE];
1128         const char *mtime_str = timestring(f->modtime);
1129         int size_width = human_readable ? 14 : 11;
1130         int mtime_width = 1 + strlen(mtime_str);
1131         int atime_width = atimes_ndx ? mtime_width : 0;
1132
1133         if (!F_IS_ACTIVE(f)) {
1134                 /* this can happen if duplicate names were removed */
1135                 return;
1136         }
1137
1138         /* TODO: indicate '+' if the entry has an ACL. */
1139
1140         if (missing_args == 2 && f->mode == 0) {
1141                 rprintf(FINFO, "%-*s %s\n",
1142                         10 + 1 + size_width + mtime_width + atime_width, "*missing",
1143                         f_name(f, NULL));
1144         } else {
1145                 const char *atime_str = atimes_ndx && !S_ISDIR(f->mode) ? timestring(F_ATIME(f)) : "";
1146                 const char *arrow, *lnk;
1147
1148                 permstring(permbuf, f->mode);
1149
1150 #ifdef SUPPORT_LINKS
1151                 if (preserve_links && S_ISLNK(f->mode)) {
1152                         arrow = " -> ";
1153                         lnk = F_SYMLINK(f);
1154                 } else
1155 #endif
1156                         arrow = lnk = "";
1157
1158                 rprintf(FINFO, "%s %*s %s%*s %s%s%s\n",
1159                         permbuf, size_width, human_num(F_LENGTH(f)),
1160                         timestring(f->modtime), atime_width, atime_str,
1161                         f_name(f, NULL), arrow, lnk);
1162         }
1163 }
1164
1165 static int phase = 0;
1166 static int dflt_perms;
1167
1168 static int implied_dirs_are_missing;
1169 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1170 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1171 {
1172         return F_DEPTH(file) > F_DEPTH(subtree)
1173                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1174 }
1175
1176 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1177  * make sure it exists, and has the right permissions/timestamp info.  For
1178  * all other non-regular files (symlinks, etc.) we create them here.  For
1179  * regular files that have changed, we try to find a basis file and then
1180  * start sending checksums.  The ndx is the file's unique index value.
1181  *
1182  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1183  * passed to delete_item(), which can use it during a recursive delete.)
1184  *
1185  * Note that f_out is set to -1 when doing final directory-permission and
1186  * modification-time repair. */
1187 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1188                            int itemizing, enum logcode code, int f_out)
1189 {
1190         static const char *parent_dirname = "";
1191         static struct file_struct *prior_dir_file = NULL;
1192         /* Missing dir not created due to --dry-run; will still be scanned. */
1193         static struct file_struct *dry_missing_dir = NULL;
1194         /* Missing dir whose contents are skipped altogether due to
1195          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1196         static struct file_struct *skip_dir = NULL;
1197         static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1198         static int need_fuzzy_dirlist = 0;
1199         struct file_struct *fuzzy_file = NULL;
1200         int fd = -1, f_copy = -1;
1201         stat_x sx, real_sx;
1202         STRUCT_STAT partial_st;
1203         struct file_struct *back_file = NULL;
1204         int statret, real_ret, stat_errno;
1205         char *fnamecmp, *partialptr, *backupptr = NULL;
1206         char fnamecmpbuf[MAXPATHLEN];
1207         uchar fnamecmp_type;
1208         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1209         int is_dir = !S_ISDIR(file->mode) ? 0
1210                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1211                    : 1;
1212
1213         if (DEBUG_GTE(GENR, 1))
1214                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1215
1216         if (list_only) {
1217                 if (is_dir < 0
1218                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1219                         return;
1220                 list_file_entry(file);
1221                 return;
1222         }
1223
1224         maybe_ATTRS_SET_NANO = always_checksum ? ATTRS_SET_NANO : 0;
1225
1226         if (skip_dir) {
1227                 if (is_below(file, skip_dir)) {
1228                         if (is_dir)
1229                                 file->flags |= FLAG_MISSING_DIR;
1230 #ifdef SUPPORT_HARD_LINKS
1231                         else if (F_IS_HLINKED(file))
1232                                 handle_skipped_hlink(file, itemizing, code, f_out);
1233 #endif
1234                         return;
1235                 }
1236                 skip_dir = NULL;
1237         }
1238
1239         init_stat_x(&sx);
1240         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1241                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1242                         if (is_dir < 0)
1243                                 return;
1244 #ifdef SUPPORT_HARD_LINKS
1245                         if (F_IS_HLINKED(file))
1246                                 handle_skipped_hlink(file, itemizing, code, f_out);
1247 #endif
1248                         rprintf(FERROR_XFER,
1249                                 "ERROR: daemon refused to receive %s \"%s\"\n",
1250                                 is_dir ? "directory" : "file", fname);
1251                         if (is_dir)
1252                                 goto skipping_dir_contents;
1253                         return;
1254                 }
1255         }
1256
1257         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1258                 int i;
1259           parent_is_dry_missing:
1260                 for (i = 0; i < fuzzy_basis; i++) {
1261                         if (fuzzy_dirlist[i]) {
1262                                 flist_free(fuzzy_dirlist[i]);
1263                                 fuzzy_dirlist[i] = NULL;
1264                         }
1265                 }
1266                 parent_dirname = "";
1267                 statret = -1;
1268                 stat_errno = ENOENT;
1269         } else {
1270                 const char *dn = file->dirname ? file->dirname : ".";
1271                 dry_missing_dir = NULL;
1272                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1273                         /* Each parent dir must be in the file list or the flist data is bad.
1274                          * Optimization: most of the time the parent dir will be the last dir
1275                          * this function was asked to process in the file list. */
1276                         if (!inc_recurse
1277                          && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
1278                          && (!prior_dir_file || strcmp(dn, f_name(prior_dir_file, NULL)) != 0)
1279                          && flist_find_name(cur_flist, dn, 1) < 0) {
1280                                 rprintf(FERROR,
1281                                         "ABORTING due to invalid path from sender: %s/%s\n",
1282                                         dn, file->basename);
1283                                 exit_cleanup(RERR_PROTOCOL);
1284                         }
1285                         if (relative_paths && !implied_dirs
1286                          && do_stat(dn, &sx.st) < 0) {
1287                                 if (dry_run)
1288                                         goto parent_is_dry_missing;
1289                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1290                                         rsyserr(FERROR_XFER, errno,
1291                                                 "recv_generator: mkdir %s failed",
1292                                                 full_fname(dn));
1293                                 }
1294                         }
1295                         if (fuzzy_basis) {
1296                                 int i;
1297                                 for (i = 0; i < fuzzy_basis; i++) {
1298                                         if (fuzzy_dirlist[i]) {
1299                                                 flist_free(fuzzy_dirlist[i]);
1300                                                 fuzzy_dirlist[i] = NULL;
1301                                         }
1302                                 }
1303                                 need_fuzzy_dirlist = 1;
1304                         }
1305 #ifdef SUPPORT_ACLS
1306                         if (!preserve_perms)
1307                                 dflt_perms = default_perms_for_dir(dn);
1308 #endif
1309                 }
1310                 parent_dirname = dn;
1311
1312                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1313                         int i;
1314                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1315                         for (i = 0; i < fuzzy_basis; i++) {
1316                                 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1317                                         continue;
1318                                 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES | GDL_PERHAPS_DIR);
1319                                 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1320                                         flist_free(fuzzy_dirlist[i]);
1321                                         fuzzy_dirlist[i] = NULL;
1322                                 }
1323                         }
1324                         need_fuzzy_dirlist = 0;
1325                 }
1326
1327                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1328                 stat_errno = errno;
1329         }
1330
1331         if (missing_args == 2 && file->mode == 0) {
1332                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1333                         return;
1334                 if (statret == 0)
1335                         delete_item(fname, sx.st.st_mode, del_opts);
1336                 return;
1337         }
1338
1339         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1340                 if (is_dir) {
1341                         if (is_dir < 0)
1342                                 return;
1343                         skip_dir = file;
1344                         file->flags |= FLAG_MISSING_DIR;
1345                 }
1346 #ifdef SUPPORT_HARD_LINKS
1347                 else if (F_IS_HLINKED(file))
1348                         handle_skipped_hlink(file, itemizing, code, f_out);
1349 #endif
1350                 if (INFO_GTE(SKIP, 1)) {
1351                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1352                                 is_dir ? "directory" : "file", fname);
1353                 }
1354                 return;
1355         }
1356
1357         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1358          && !am_root && sx.st.st_uid == our_uid)
1359                 del_opts |= DEL_NO_UID_WRITE;
1360
1361         if (ignore_existing > 0 && statret == 0
1362          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1363                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1364                         rprintf(FINFO, "%s exists\n", fname);
1365 #ifdef SUPPORT_HARD_LINKS
1366                 if (F_IS_HLINKED(file))
1367                         handle_skipped_hlink(file, itemizing, code, f_out);
1368 #endif
1369                 goto cleanup;
1370         }
1371
1372         fnamecmp = fname;
1373
1374         if (is_dir) {
1375                 mode_t added_perms;
1376                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1377                         goto cleanup;
1378                 if (am_root < 0) {
1379                         /* For --fake-super, the dir must be useable by the copying
1380                          * user, just like it would be for root. */
1381                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1382                 } else
1383                         added_perms = 0;
1384                 if (is_dir < 0) {
1385                         if (!(preserve_times & PRESERVE_DIR_TIMES))
1386                                 return;
1387                         /* In inc_recurse mode we want to make sure any missing
1388                          * directories get created while we're still processing
1389                          * the parent dir (which allows us to touch the parent
1390                          * dir's mtime right away).  We will handle the dir in
1391                          * full later (right before we handle its contents). */
1392                         if (statret == 0
1393                          && (S_ISDIR(sx.st.st_mode)
1394                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1395                                 goto cleanup; /* Any errors get reported later. */
1396                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1397                                 file->flags |= FLAG_DIR_CREATED;
1398                         goto cleanup;
1399                 }
1400                 /* The file to be received is a directory, so we need
1401                  * to prepare appropriately.  If there is already a
1402                  * file of that name and it is *not* a directory, then
1403                  * we need to delete it.  If it doesn't exist, then
1404                  * (perhaps recursively) create it. */
1405                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1406                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1407                                 goto skipping_dir_contents;
1408                         statret = -1;
1409                 }
1410                 if (dry_run && statret != 0) {
1411                         if (!dry_missing_dir)
1412                                 dry_missing_dir = file;
1413                         file->flags |= FLAG_MISSING_DIR;
1414                 }
1415                 init_stat_x(&real_sx);
1416                 real_sx.st = sx.st;
1417                 real_ret = statret;
1418                 if (file->flags & FLAG_DIR_CREATED)
1419                         statret = -1;
1420                 if (!preserve_perms) { /* See comment in non-dir code below. */
1421                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1422                                                dflt_perms, statret == 0);
1423                 }
1424                 if (statret != 0 && basis_dir[0] != NULL) {
1425                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1426                                               itemizing, code);
1427                         if (j == -2) {
1428                                 itemizing = 0;
1429                                 code = FNONE;
1430                                 statret = 1;
1431                         } else if (j >= 0) {
1432                                 statret = 1;
1433                                 fnamecmp = fnamecmpbuf;
1434                         }
1435                 }
1436                 if (itemizing && f_out != -1) {
1437                         itemize(fnamecmp, file, ndx, statret, &sx,
1438                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1439                 }
1440                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1441                         if (!relative_paths || errno != ENOENT
1442                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1443                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1444                                 rsyserr(FERROR_XFER, errno,
1445                                         "recv_generator: mkdir %s failed",
1446                                         full_fname(fname));
1447                           skipping_dir_contents:
1448                                 rprintf(FERROR,
1449                                     "*** Skipping any contents from this failed directory ***\n");
1450                                 skip_dir = file;
1451                                 file->flags |= FLAG_MISSING_DIR;
1452                                 goto cleanup;
1453                         }
1454                 }
1455
1456 #ifdef SUPPORT_XATTRS
1457                 if (preserve_xattrs && statret == 1)
1458                         copy_xattrs(fnamecmpbuf, fname);
1459 #endif
1460                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1461                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1462                         rprintf(code, "%s/\n", fname);
1463
1464                 /* We need to ensure that the dirs in the transfer have both
1465                  * readable and writable permissions during the time we are
1466                  * putting files within them.  This is then restored to the
1467                  * former permissions after the transfer is done. */
1468 #ifdef HAVE_CHMOD
1469                 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1470                         mode_t mode = file->mode | S_IRWXU;
1471                         if (do_chmod(fname, mode) < 0) {
1472                                 rsyserr(FERROR_XFER, errno,
1473                                         "failed to modify permissions on %s",
1474                                         full_fname(fname));
1475                         }
1476                         need_retouch_dir_perms = 1;
1477                 }
1478 #endif
1479
1480                 if (real_ret != 0 && one_file_system)
1481                         real_sx.st.st_dev = filesystem_dev;
1482                 if (inc_recurse) {
1483                         if (one_file_system) {
1484                                 uint32 *devp = F_DIR_DEV_P(file);
1485                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1486                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1487                         }
1488                 }
1489                 else if (delete_during && f_out != -1 && !phase
1490                     && !(file->flags & FLAG_MISSING_DIR)) {
1491                         if (file->flags & FLAG_CONTENT_DIR)
1492                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1493                         else
1494                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1495                 }
1496                 prior_dir_file = file;
1497                 goto cleanup;
1498         }
1499
1500         /* If we're not preserving permissions, change the file-list's
1501          * mode based on the local permissions and some heuristics. */
1502         if (!preserve_perms) {
1503                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1504                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1505                                        exists);
1506         }
1507
1508 #ifdef SUPPORT_HARD_LINKS
1509         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1510          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1511                 goto cleanup;
1512 #endif
1513
1514         if (preserve_links && S_ISLNK(file->mode)) {
1515 #ifdef SUPPORT_LINKS
1516                 const char *sl = F_SYMLINK(file);
1517                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1518                         if (INFO_GTE(NAME, 1)) {
1519                                 if (solo_file) {
1520                                         /* fname contains the destination path, but we
1521                                          * want to report the source path. */
1522                                         fname = f_name(file, NULL);
1523                                 }
1524                                 rprintf(FINFO,
1525                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1526                                         fname, sl);
1527                         }
1528                         return;
1529                 }
1530                 if (statret == 0) {
1531                         char lnk[MAXPATHLEN];
1532                         int len;
1533
1534                         if (S_ISLNK(sx.st.st_mode)
1535                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1536                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1537                                 /* The link is pointing to the right place. */
1538                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1539                                 if (itemizing)
1540                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1541 #ifdef SUPPORT_HARD_LINKS
1542                                 if (preserve_hard_links && F_IS_HLINKED(file))
1543                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1544 #endif
1545                                 if (remove_source_files == 1)
1546                                         goto return_with_success;
1547                                 goto cleanup;
1548                         }
1549                 } else if (basis_dir[0] != NULL) {
1550                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1551                                               itemizing, code);
1552                         if (j == -2) {
1553 #ifndef CAN_HARDLINK_SYMLINK
1554                                 if (link_dest) {
1555                                         /* Resort to --copy-dest behavior. */
1556                                 } else
1557 #endif
1558                                 if (!copy_dest)
1559                                         goto cleanup;
1560                                 itemizing = 0;
1561                                 code = FNONE;
1562                         } else if (j >= 0) {
1563                                 statret = 1;
1564                                 fnamecmp = fnamecmpbuf;
1565                         }
1566                 }
1567                 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1568                         set_file_attrs(fname, file, NULL, NULL, 0);
1569                         if (itemizing) {
1570                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1571                                         statret = -1;
1572                                 itemize(fnamecmp, file, ndx, statret, &sx,
1573                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1574                         }
1575                         if (code != FNONE && INFO_GTE(NAME, 1))
1576                                 rprintf(code, "%s -> %s\n", fname, sl);
1577 #ifdef SUPPORT_HARD_LINKS
1578                         if (preserve_hard_links && F_IS_HLINKED(file))
1579                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1580 #endif
1581                         /* This does not check remove_source_files == 1
1582                          * because this is one of the items that the old
1583                          * --remove-sent-files option would remove. */
1584                         if (remove_source_files)
1585                                 goto return_with_success;
1586                 }
1587 #endif
1588                 goto cleanup;
1589         }
1590
1591         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1592          || (preserve_specials && IS_SPECIAL(file->mode))) {
1593                 dev_t rdev;
1594                 int del_for_flag = 0;
1595                 if (IS_DEVICE(file->mode)) {
1596                         uint32 *devp = F_RDEV_P(file);
1597                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1598                 } else
1599                         rdev = 0;
1600                 if (statret == 0) {
1601                         if (IS_DEVICE(file->mode)) {
1602                                 if (!IS_DEVICE(sx.st.st_mode))
1603                                         statret = -1;
1604                                 del_for_flag = DEL_FOR_DEVICE;
1605                         } else {
1606                                 if (!IS_SPECIAL(sx.st.st_mode))
1607                                         statret = -1;
1608                                 del_for_flag = DEL_FOR_SPECIAL;
1609                         }
1610                         if (statret == 0
1611                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1612                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1613                                 /* The device or special file is identical. */
1614                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1615                                 if (itemizing)
1616                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1617 #ifdef SUPPORT_HARD_LINKS
1618                                 if (preserve_hard_links && F_IS_HLINKED(file))
1619                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1620 #endif
1621                                 if (remove_source_files == 1)
1622                                         goto return_with_success;
1623                                 goto cleanup;
1624                         }
1625                 } else if (basis_dir[0] != NULL) {
1626                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1627                                               itemizing, code);
1628                         if (j == -2) {
1629 #ifndef CAN_HARDLINK_SPECIAL
1630                                 if (link_dest) {
1631                                         /* Resort to --copy-dest behavior. */
1632                                 } else
1633 #endif
1634                                 if (!copy_dest)
1635                                         goto cleanup;
1636                                 itemizing = 0;
1637                                 code = FNONE;
1638                         } else if (j >= 0) {
1639                                 statret = 1;
1640                                 fnamecmp = fnamecmpbuf;
1641                         }
1642                 }
1643                 if (DEBUG_GTE(GENR, 1)) {
1644                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1645                                 fname, (int)file->mode,
1646                                 (long)major(rdev), (long)minor(rdev));
1647                 }
1648                 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1649                         set_file_attrs(fname, file, NULL, NULL, 0);
1650                         if (itemizing) {
1651                                 itemize(fnamecmp, file, ndx, statret, &sx,
1652                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1653                         }
1654                         if (code != FNONE && INFO_GTE(NAME, 1))
1655                                 rprintf(code, "%s\n", fname);
1656 #ifdef SUPPORT_HARD_LINKS
1657                         if (preserve_hard_links && F_IS_HLINKED(file))
1658                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1659 #endif
1660                         if (remove_source_files == 1)
1661                                 goto return_with_success;
1662                 }
1663                 goto cleanup;
1664         }
1665
1666         if (!S_ISREG(file->mode)) {
1667                 if (solo_file)
1668                         fname = f_name(file, NULL);
1669                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1670                 goto cleanup;
1671         }
1672
1673         if (max_size >= 0 && F_LENGTH(file) > max_size) {
1674                 if (INFO_GTE(SKIP, 1)) {
1675                         if (solo_file)
1676                                 fname = f_name(file, NULL);
1677                         rprintf(FINFO, "%s is over max-size\n", fname);
1678                 }
1679                 goto cleanup;
1680         }
1681         if (min_size >= 0 && F_LENGTH(file) < min_size) {
1682                 if (INFO_GTE(SKIP, 1)) {
1683                         if (solo_file)
1684                                 fname = f_name(file, NULL);
1685                         rprintf(FINFO, "%s is under min-size\n", fname);
1686                 }
1687                 goto cleanup;
1688         }
1689
1690         if (update_only > 0 && statret == 0 && time_diff(&sx.st, file) > 0) {
1691                 if (INFO_GTE(SKIP, 1))
1692                         rprintf(FINFO, "%s is newer\n", fname);
1693 #ifdef SUPPORT_HARD_LINKS
1694                 if (F_IS_HLINKED(file))
1695                         handle_skipped_hlink(file, itemizing, code, f_out);
1696 #endif
1697                 goto cleanup;
1698         }
1699
1700         fnamecmp_type = FNAMECMP_FNAME;
1701
1702         if (statret == 0 && !(S_ISREG(sx.st.st_mode) || (write_devices && IS_DEVICE(sx.st.st_mode)))) {
1703                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1704                         goto cleanup;
1705                 statret = -1;
1706                 stat_errno = ENOENT;
1707         }
1708
1709         if (basis_dir[0] != NULL && (statret != 0 || !copy_dest)) {
1710                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1711                                       statret == 0, itemizing, code);
1712                 if (j == -2) {
1713                         if (remove_source_files == 1)
1714                                 goto return_with_success;
1715                         goto cleanup;
1716                 }
1717                 if (j >= 0) {
1718                         fnamecmp = fnamecmpbuf;
1719                         fnamecmp_type = j;
1720                         statret = 0;
1721                 }
1722         }
1723
1724         init_stat_x(&real_sx);
1725         real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1726         real_ret = statret;
1727
1728         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1729             && link_stat(partialptr, &partial_st, 0) == 0
1730             && S_ISREG(partial_st.st_mode)) {
1731                 if (statret != 0)
1732                         goto prepare_to_open;
1733         } else
1734                 partialptr = NULL;
1735
1736         if (statret != 0 && fuzzy_basis) {
1737                 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1738                 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1739                 if (fuzzy_file) {
1740                         f_name(fuzzy_file, fnamecmpbuf);
1741                         if (DEBUG_GTE(FUZZY, 1)) {
1742                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1743                                         fname, fnamecmpbuf);
1744                         }
1745                         sx.st.st_size = F_LENGTH(fuzzy_file);
1746                         statret = 0;
1747                         fnamecmp = fnamecmpbuf;
1748                 }
1749         }
1750
1751         if (statret != 0) {
1752 #ifdef SUPPORT_HARD_LINKS
1753                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1754                         cur_flist->in_progress++;
1755                         goto cleanup;
1756                 }
1757 #endif
1758                 if (stat_errno == ENOENT)
1759                         goto notify_others;
1760                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1761                         full_fname(fname));
1762                 goto cleanup;
1763         }
1764
1765         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1766                 ;
1767         else if (fnamecmp_type >= FNAMECMP_FUZZY)
1768                 ;
1769         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1770                 if (partialptr) {
1771                         do_unlink(partialptr);
1772                         handle_partial_dir(partialptr, PDIR_DELETE);
1773                 }
1774                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT | maybe_ATTRS_SET_NANO);
1775                 if (itemizing)
1776                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1777 #ifdef SUPPORT_HARD_LINKS
1778                 if (preserve_hard_links && F_IS_HLINKED(file))
1779                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1780 #endif
1781                 if (remove_source_files != 1)
1782                         goto cleanup;
1783           return_with_success:
1784                 if (!dry_run)
1785                         send_msg_int(MSG_SUCCESS, ndx);
1786                 goto cleanup;
1787         }
1788
1789         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1790 #ifdef SUPPORT_HARD_LINKS
1791                 if (F_IS_HLINKED(file))
1792                         handle_skipped_hlink(file, itemizing, code, f_out);
1793 #endif
1794                 goto cleanup;
1795         }
1796
1797   prepare_to_open:
1798         if (partialptr) {
1799                 sx.st = partial_st;
1800                 fnamecmp = partialptr;
1801                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1802                 statret = 0;
1803         }
1804
1805         if (!do_xfers)
1806                 goto notify_others;
1807
1808         if (read_batch || whole_file) {
1809                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1810                         if (!(backupptr = get_backup_name(fname)))
1811                                 goto cleanup;
1812                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1813                                 goto pretend_missing;
1814                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1815                                 unmake_file(back_file);
1816                                 back_file = NULL;
1817                                 goto cleanup;
1818                         }
1819                 }
1820                 goto notify_others;
1821         }
1822
1823         if (fuzzy_dirlist[0]) {
1824                 int j = flist_find(fuzzy_dirlist[0], file);
1825                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1826                         fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1827         }
1828
1829         /* open the file */
1830         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1831                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1832                         full_fname(fnamecmp));
1833           pretend_missing:
1834                 /* pretend the file didn't exist */
1835 #ifdef SUPPORT_HARD_LINKS
1836                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1837                         cur_flist->in_progress++;
1838                         goto cleanup;
1839                 }
1840 #endif
1841                 statret = real_ret = -1;
1842                 goto notify_others;
1843         }
1844
1845         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1846                 if (!(backupptr = get_backup_name(fname))) {
1847                         close(fd);
1848                         goto cleanup;
1849                 }
1850                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1851                         close(fd);
1852                         goto pretend_missing;
1853                 }
1854                 if (robust_unlink(backupptr) && errno != ENOENT) {
1855                         rsyserr(FERROR_XFER, errno, "unlink %s",
1856                                 full_fname(backupptr));
1857                         unmake_file(back_file);
1858                         back_file = NULL;
1859                         close(fd);
1860                         goto cleanup;
1861                 }
1862                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1863                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1864                         unmake_file(back_file);
1865                         back_file = NULL;
1866                         close(fd);
1867                         goto cleanup;
1868                 }
1869                 fnamecmp_type = FNAMECMP_BACKUP;
1870         }
1871
1872         if (DEBUG_GTE(DELTASUM, 3)) {
1873                 rprintf(FINFO, "gen mapped %s of size %s\n",
1874                         fnamecmp, big_num(sx.st.st_size));
1875         }
1876
1877         if (DEBUG_GTE(DELTASUM, 2))
1878                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1879
1880   notify_others:
1881         if (remove_source_files && !delay_updates && !phase && !dry_run)
1882                 increment_active_files(ndx, itemizing, code);
1883         if (inc_recurse && (!dry_run || write_batch < 0))
1884                 cur_flist->in_progress++;
1885 #ifdef SUPPORT_HARD_LINKS
1886         if (preserve_hard_links && F_IS_HLINKED(file))
1887                 file->flags |= FLAG_FILE_SENT;
1888 #endif
1889         write_ndx(f_out, ndx);
1890         if (itemizing) {
1891                 int iflags = ITEM_TRANSFER;
1892                 if (always_checksum > 0)
1893                         iflags |= ITEM_REPORT_CHANGE;
1894                 if (fnamecmp_type != FNAMECMP_FNAME)
1895                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1896                 if (fnamecmp_type >= FNAMECMP_FUZZY)
1897                         iflags |= ITEM_XNAME_FOLLOWS;
1898                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1899                         fuzzy_file ? fuzzy_file->basename : NULL);
1900                 free_stat_x(&real_sx);
1901         }
1902
1903         if (!do_xfers) {
1904 #ifdef SUPPORT_HARD_LINKS
1905                 if (preserve_hard_links && F_IS_HLINKED(file))
1906                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1907 #endif
1908                 goto cleanup;
1909         }
1910         if (read_batch)
1911                 goto cleanup;
1912
1913         if (statret != 0 || whole_file)
1914                 write_sum_head(f_out, NULL);
1915         else if (sx.st.st_size <= 0) {
1916                 write_sum_head(f_out, NULL);
1917                 close(fd);
1918         } else {
1919                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1920                         rprintf(FWARNING,
1921                             "WARNING: file is too large for checksum sending: %s\n",
1922                             fnamecmp);
1923                         write_sum_head(f_out, NULL);
1924                 }
1925                 close(fd);
1926         }
1927
1928   cleanup:
1929         if (back_file) {
1930                 int save_preserve_xattrs = preserve_xattrs;
1931                 if (f_copy >= 0)
1932                         close(f_copy);
1933 #ifdef SUPPORT_XATTRS
1934                 if (preserve_xattrs) {
1935                         copy_xattrs(fname, backupptr);
1936                         preserve_xattrs = 0;
1937                 }
1938 #endif
1939                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1940                 preserve_xattrs = save_preserve_xattrs;
1941                 if (INFO_GTE(BACKUP, 1)) {
1942                         rprintf(FINFO, "backed up %s to %s\n",
1943                                 fname, backupptr);
1944                 }
1945                 unmake_file(back_file);
1946         }
1947
1948         free_stat_x(&sx);
1949 }
1950
1951 /* If we are replacing an existing hard link, symlink, device, or special file,
1952  * create a temp-name item and rename it into place.  A symlimk specifies slnk,
1953  * a hard link specifies hlnk, otherwise we create a device based on rdev.
1954  * Specify 0 for the del_for_flag if there is not a file to replace.  This
1955  * returns 1 on success and 0 on failure. */
1956 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1957                   dev_t rdev, stat_x *sxp, int del_for_flag)
1958 {
1959         char tmpname[MAXPATHLEN];
1960         const char *create_name;
1961         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1962
1963         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1964                 skip_atomic = 1;
1965         else
1966                 skip_atomic = 0;
1967
1968         if (del_for_flag) {
1969                 if (make_backups > 0 && !dir_in_the_way) {
1970                         if (!make_backup(fname, skip_atomic))
1971                                 return 0;
1972                 } else if (skip_atomic) {
1973                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1974                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1975                                 return 0;
1976                 }
1977         }
1978
1979         create_name = skip_atomic ? fname : tmpname;
1980
1981         if (slnk) {
1982 #ifdef SUPPORT_LINKS
1983                 if (do_symlink(slnk, create_name) < 0) {
1984                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1985                                 full_fname(create_name), slnk);
1986                         return 0;
1987                 }
1988 #else
1989                 return 0;
1990 #endif
1991         } else if (hlnk) {
1992 #ifdef SUPPORT_HARD_LINKS
1993                 if (!hard_link_one(file, create_name, hlnk, 0))
1994                         return 0;
1995 #else
1996                 return 0;
1997 #endif
1998         } else {
1999                 if (do_mknod(create_name, file->mode, rdev) < 0) {
2000                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
2001                                 full_fname(create_name));
2002                         return 0;
2003                 }
2004         }
2005
2006         if (!skip_atomic) {
2007                 if (do_rename(tmpname, fname) < 0) {
2008                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
2009                                 full_fname(tmpname), full_fname(fname));
2010                         do_unlink(tmpname);
2011                         return 0;
2012                 }
2013         }
2014
2015         return 1;
2016 }
2017
2018 #ifdef SUPPORT_HARD_LINKS
2019 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2020                                  enum logcode code, int f_out)
2021 {
2022         char fbuf[MAXPATHLEN];
2023         int new_last_ndx;
2024         struct file_list *save_flist = cur_flist;
2025
2026         /* If we skip the last item in a chain of links and there was a
2027          * prior non-skipped hard-link waiting to finish, finish it now. */
2028         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2029                 return;
2030
2031         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2032         cur_flist->in_progress--; /* undo prior increment */
2033         f_name(file, fbuf);
2034         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2035
2036         cur_flist = save_flist;
2037 }
2038 #endif
2039
2040 static void touch_up_dirs(struct file_list *flist, int ndx)
2041 {
2042         static int counter = 0;
2043         struct file_struct *file;
2044         char *fname;
2045         BOOL fix_dir_perms;
2046         int i, start, end;
2047
2048         if (ndx < 0) {
2049                 start = 0;
2050                 end = flist->used - 1;
2051         } else
2052                 start = end = ndx;
2053
2054         /* Fix any directory permissions that were modified during the
2055          * transfer and/or re-set any tweaked modified-time values. */
2056         for (i = start; i <= end; i++, counter++) {
2057                 file = flist->files[i];
2058                 if (!F_IS_ACTIVE(file))
2059                         continue;
2060                 if (!S_ISDIR(file->mode)
2061                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2062                         continue;
2063                 if (DEBUG_GTE(TIME, 2)) {
2064                         fname = f_name(file, NULL);
2065                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2066                                 NS(fname), i);
2067                 }
2068                 /* Be sure not to retouch permissions with --fake-super. */
2069                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2070                 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2071                         continue;
2072                 fname = f_name(file, NULL);
2073                 if (fix_dir_perms)
2074                         do_chmod(fname, file->mode);
2075                 if (need_retouch_dir_times) {
2076                         STRUCT_STAT st;
2077                         if (link_stat(fname, &st, 0) == 0 && time_diff(&st, file)) {
2078                                 st.st_mtime = file->modtime;
2079 #ifdef ST_MTIME_NSEC
2080                                 st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file);
2081 #endif
2082                                 set_times(fname, &st);
2083                         }
2084                 }
2085                 if (counter >= loopchk_limit) {
2086                         if (allowed_lull)
2087                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2088                         else
2089                                 maybe_flush_socket(0);
2090                         counter = 0;
2091                 }
2092         }
2093 }
2094
2095 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2096 {
2097         struct file_struct *file;
2098         struct file_list *flist;
2099         char fbuf[MAXPATHLEN];
2100         int ndx;
2101
2102         while (1) {
2103 #ifdef SUPPORT_HARD_LINKS
2104                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2105                         int send_failed = (ndx == -2);
2106                         if (send_failed)
2107                                 ndx = get_hlink_num();
2108                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2109                         file = flist->files[ndx - flist->ndx_start];
2110                         assert(file->flags & FLAG_HLINKED);
2111                         if (send_failed)
2112                                 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2113                         else
2114                                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2115                         flist->in_progress--;
2116                         continue;
2117                 }
2118 #endif
2119
2120                 if (check_redo && (ndx = get_redo_num()) != -1) {
2121                         OFF_T save_max_size = max_size;
2122                         OFF_T save_min_size = min_size;
2123                         csum_length = SUM_LENGTH;
2124                         max_size = -1;
2125                         min_size = -1;
2126                         ignore_existing = -ignore_existing;
2127                         ignore_non_existing = -ignore_non_existing;
2128                         update_only = -update_only;
2129                         always_checksum = -always_checksum;
2130                         size_only = -size_only;
2131                         append_mode = -append_mode;
2132                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2133                         ignore_times++;
2134
2135                         flist = cur_flist;
2136                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2137
2138                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2139                         if (solo_file)
2140                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2141                         else
2142                                 f_name(file, fbuf);
2143                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2144                         cur_flist->to_redo--;
2145
2146                         cur_flist = flist;
2147
2148                         csum_length = SHORT_SUM_LENGTH;
2149                         max_size = save_max_size;
2150                         min_size = save_min_size;
2151                         ignore_existing = -ignore_existing;
2152                         ignore_non_existing = -ignore_non_existing;
2153                         update_only = -update_only;
2154                         always_checksum = -always_checksum;
2155                         size_only = -size_only;
2156                         append_mode = -append_mode;
2157                         make_backups = -make_backups;
2158                         ignore_times--;
2159                         continue;
2160                 }
2161
2162                 if (cur_flist == first_flist)
2163                         break;
2164
2165                 /* We only get here if inc_recurse is enabled. */
2166                 if (first_flist->in_progress || first_flist->to_redo)
2167                         break;
2168
2169                 write_ndx(sock_f_out, NDX_DONE);
2170                 if (!read_batch && !flist_eof) {
2171                         int old_total = 0;
2172                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2173                                 old_total += flist->used;
2174                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2175                 }
2176
2177                 if (delete_during == 2 || !dir_tweaking) {
2178                         /* Skip directory touch-up. */
2179                 } else if (first_flist->parent_ndx >= 0)
2180                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2181
2182                 flist_free(first_flist); /* updates first_flist */
2183         }
2184 }
2185
2186 void generate_files(int f_out, const char *local_name)
2187 {
2188         int i, ndx, next_loopchk = 0;
2189         char fbuf[MAXPATHLEN];
2190         int itemizing;
2191         enum logcode code;
2192         int save_info_flist = info_levels[INFO_FLIST];
2193         int save_info_progress = info_levels[INFO_PROGRESS];
2194
2195         if (protocol_version >= 29) {
2196                 itemizing = 1;
2197                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2198                 code = logfile_format_has_i ? FNONE : FLOG;
2199         } else if (am_daemon) {
2200                 itemizing = logfile_format_has_i && do_xfers;
2201                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2202                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2203         } else if (!am_server) {
2204                 itemizing = stdout_format_has_i;
2205                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2206                 code = itemizing ? FNONE : FINFO;
2207         } else {
2208                 itemizing = 0;
2209                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2210                 code = FINFO;
2211         }
2212         solo_file = local_name;
2213         dir_tweaking = !(list_only || solo_file || dry_run);
2214         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2215         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2216         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2217             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2218         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2219
2220         if (DEBUG_GTE(GENR, 1))
2221                 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2222
2223         if (delete_before && !solo_file && cur_flist->used > 0)
2224                 do_delete_pass();
2225         if (delete_during == 2) {
2226                 deldelay_size = BIGPATHBUFLEN * 4;
2227                 deldelay_buf = new_array(char, deldelay_size);
2228                 if (!deldelay_buf)
2229                         out_of_memory("delete-delay");
2230         }
2231         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2232
2233         if (append_mode > 0 || whole_file < 0)
2234                 whole_file = 0;
2235         if (DEBUG_GTE(FLIST, 1)) {
2236                 rprintf(FINFO, "delta-transmission %s\n",
2237                         whole_file
2238                         ? "disabled for local transfer or --whole-file"
2239                         : "enabled");
2240         }
2241
2242         dflt_perms = (ACCESSPERMS & ~orig_umask);
2243
2244         do {
2245 #ifdef SUPPORT_HARD_LINKS
2246                 if (preserve_hard_links && inc_recurse) {
2247                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2248                                 wait_for_receiver();
2249                 }
2250 #endif
2251
2252                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2253                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2254                         if (solo_file)
2255                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2256                         else
2257                                 f_name(fp, fbuf);
2258                         ndx = cur_flist->ndx_start - 1;
2259                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2260                         if (delete_during && dry_run < 2 && !list_only
2261                          && !(fp->flags & FLAG_MISSING_DIR)) {
2262                                 if (fp->flags & FLAG_CONTENT_DIR) {
2263                                         dev_t dirdev;
2264                                         if (one_file_system) {
2265                                                 uint32 *devp = F_DIR_DEV_P(fp);
2266                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2267                                         } else
2268                                                 dirdev = MAKEDEV(0, 0);
2269                                         delete_in_dir(fbuf, fp, &dirdev);
2270                                 } else
2271                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2272                         }
2273                 }
2274                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2275                         struct file_struct *file = cur_flist->sorted[i];
2276
2277                         if (!F_IS_ACTIVE(file))
2278                                 continue;
2279
2280                         if (unsort_ndx)
2281                                 ndx = F_NDX(file);
2282                         else
2283                                 ndx = i + cur_flist->ndx_start;
2284
2285                         if (solo_file)
2286                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2287                         else
2288                                 f_name(file, fbuf);
2289                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2290
2291                         check_for_finished_files(itemizing, code, 0);
2292
2293                         if (i + cur_flist->ndx_start >= next_loopchk) {
2294                                 if (allowed_lull)
2295                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2296                                 else
2297                                         maybe_flush_socket(0);
2298                                 next_loopchk += loopchk_limit;
2299                         }
2300                 }
2301
2302                 if (!inc_recurse) {
2303                         write_ndx(f_out, NDX_DONE);
2304                         break;
2305                 }
2306
2307                 while (1) {
2308                         check_for_finished_files(itemizing, code, 1);
2309                         if (cur_flist->next || flist_eof)
2310                                 break;
2311                         wait_for_receiver();
2312                 }
2313         } while ((cur_flist = cur_flist->next) != NULL);
2314
2315         if (delete_during)
2316                 delete_in_dir(NULL, NULL, &dev_zero);
2317         phase++;
2318         if (DEBUG_GTE(GENR, 1))
2319                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2320
2321         while (1) {
2322                 check_for_finished_files(itemizing, code, 1);
2323                 if (msgdone_cnt)
2324                         break;
2325                 wait_for_receiver();
2326         }
2327
2328         phase++;
2329         if (DEBUG_GTE(GENR, 1))
2330                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2331
2332         write_ndx(f_out, NDX_DONE);
2333
2334         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2335         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2336                 write_ndx(f_out, NDX_DONE);
2337
2338         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2339                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2340                         write_del_stats(f_out);
2341                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2342                         write_ndx(f_out, NDX_DONE);
2343         }
2344
2345         /* Read MSG_DONE for the redo phase (and any prior messages). */
2346         while (1) {
2347                 check_for_finished_files(itemizing, code, 0);
2348                 if (msgdone_cnt > 1)
2349                         break;
2350                 wait_for_receiver();
2351         }
2352
2353         if (protocol_version >= 29) {
2354                 phase++;
2355                 if (DEBUG_GTE(GENR, 1))
2356                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2357                 if (!EARLY_DELAY_DONE_MSG()) {
2358                         write_ndx(f_out, NDX_DONE);
2359                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2360                                 write_ndx(f_out, NDX_DONE);
2361                 }
2362                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2363                 while (msgdone_cnt == 2)
2364                         wait_for_receiver();
2365         }
2366
2367         info_levels[INFO_FLIST] = save_info_flist;
2368         info_levels[INFO_PROGRESS] = save_info_progress;
2369
2370         if (delete_during == 2)
2371                 do_delayed_deletions(fbuf);
2372         if (delete_after && !solo_file && file_total > 0)
2373                 do_delete_pass();
2374
2375         if (max_delete >= 0 && skipped_deletes) {
2376                 rprintf(FWARNING,
2377                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2378                         skipped_deletes);
2379                 io_error |= IOERR_DEL_LIMIT;
2380         }
2381
2382         if (protocol_version >= 31) {
2383                 if (!EARLY_DELETE_DONE_MSG()) {
2384                         if (INFO_GTE(STATS, 2) || read_batch)
2385                                 write_del_stats(f_out);
2386                         write_ndx(f_out, NDX_DONE);
2387                 }
2388
2389                 /* Read MSG_DONE for late-delete phase & prior messages. */
2390                 while (msgdone_cnt == 3)
2391                         wait_for_receiver();
2392         }
2393
2394         if ((need_retouch_dir_perms || need_retouch_dir_times)
2395          && dir_tweaking && (!inc_recurse || delete_during == 2))
2396                 touch_up_dirs(dir_flist, -1);
2397
2398         if (DEBUG_GTE(GENR, 1))
2399                 rprintf(FINFO, "generate_files finished\n");
2400 }