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                                 /* The --delete-missing-args option can actually put invalid entries into
1281                                  * the file list, so if that option was specified, we'll just complain about
1282                                  * it and allow it. */
1283                                 if (missing_args == 2 && file->mode == 0)
1284                                         rprintf(FERROR, "WARNING: parent dir is absent in the file list: %s\n", dn);
1285                                 else {
1286                                         rprintf(FERROR, "ABORTING due to invalid path from sender: %s/%s\n",
1287                                                 dn, file->basename);
1288                                         exit_cleanup(RERR_PROTOCOL);
1289                                 }
1290                         }
1291                         if (relative_paths && !implied_dirs
1292                          && do_stat(dn, &sx.st) < 0) {
1293                                 if (dry_run)
1294                                         goto parent_is_dry_missing;
1295                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1296                                         rsyserr(FERROR_XFER, errno,
1297                                                 "recv_generator: mkdir %s failed",
1298                                                 full_fname(dn));
1299                                 }
1300                         }
1301                         if (fuzzy_basis) {
1302                                 int i;
1303                                 for (i = 0; i < fuzzy_basis; i++) {
1304                                         if (fuzzy_dirlist[i]) {
1305                                                 flist_free(fuzzy_dirlist[i]);
1306                                                 fuzzy_dirlist[i] = NULL;
1307                                         }
1308                                 }
1309                                 need_fuzzy_dirlist = 1;
1310                         }
1311 #ifdef SUPPORT_ACLS
1312                         if (!preserve_perms)
1313                                 dflt_perms = default_perms_for_dir(dn);
1314 #endif
1315                 }
1316                 parent_dirname = dn;
1317
1318                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1319                         int i;
1320                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1321                         for (i = 0; i < fuzzy_basis; i++) {
1322                                 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1323                                         continue;
1324                                 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES | GDL_PERHAPS_DIR);
1325                                 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1326                                         flist_free(fuzzy_dirlist[i]);
1327                                         fuzzy_dirlist[i] = NULL;
1328                                 }
1329                         }
1330                         need_fuzzy_dirlist = 0;
1331                 }
1332
1333                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1334                 stat_errno = errno;
1335         }
1336
1337         if (missing_args == 2 && file->mode == 0) {
1338                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1339                         return;
1340                 if (statret == 0)
1341                         delete_item(fname, sx.st.st_mode, del_opts);
1342                 return;
1343         }
1344
1345         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1346                 if (is_dir) {
1347                         if (is_dir < 0)
1348                                 return;
1349                         skip_dir = file;
1350                         file->flags |= FLAG_MISSING_DIR;
1351                 }
1352 #ifdef SUPPORT_HARD_LINKS
1353                 else if (F_IS_HLINKED(file))
1354                         handle_skipped_hlink(file, itemizing, code, f_out);
1355 #endif
1356                 if (INFO_GTE(SKIP, 1)) {
1357                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1358                                 is_dir ? "directory" : "file", fname);
1359                 }
1360                 return;
1361         }
1362
1363         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1364          && !am_root && sx.st.st_uid == our_uid)
1365                 del_opts |= DEL_NO_UID_WRITE;
1366
1367         if (ignore_existing > 0 && statret == 0
1368          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1369                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1370                         rprintf(FINFO, "%s exists\n", fname);
1371 #ifdef SUPPORT_HARD_LINKS
1372                 if (F_IS_HLINKED(file))
1373                         handle_skipped_hlink(file, itemizing, code, f_out);
1374 #endif
1375                 goto cleanup;
1376         }
1377
1378         fnamecmp = fname;
1379
1380         if (is_dir) {
1381                 mode_t added_perms;
1382                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1383                         goto cleanup;
1384                 if (am_root < 0) {
1385                         /* For --fake-super, the dir must be useable by the copying
1386                          * user, just like it would be for root. */
1387                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1388                 } else
1389                         added_perms = 0;
1390                 if (is_dir < 0) {
1391                         if (!(preserve_times & PRESERVE_DIR_TIMES))
1392                                 goto cleanup;
1393                         /* In inc_recurse mode we want to make sure any missing
1394                          * directories get created while we're still processing
1395                          * the parent dir (which allows us to touch the parent
1396                          * dir's mtime right away).  We will handle the dir in
1397                          * full later (right before we handle its contents). */
1398                         if (statret == 0
1399                          && (S_ISDIR(sx.st.st_mode)
1400                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1401                                 goto cleanup; /* Any errors get reported later. */
1402                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1403                                 file->flags |= FLAG_DIR_CREATED;
1404                         goto cleanup;
1405                 }
1406                 /* The file to be received is a directory, so we need
1407                  * to prepare appropriately.  If there is already a
1408                  * file of that name and it is *not* a directory, then
1409                  * we need to delete it.  If it doesn't exist, then
1410                  * (perhaps recursively) create it. */
1411                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1412                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1413                                 goto skipping_dir_contents;
1414                         statret = -1;
1415                 }
1416                 if (dry_run && statret != 0) {
1417                         if (!dry_missing_dir)
1418                                 dry_missing_dir = file;
1419                         file->flags |= FLAG_MISSING_DIR;
1420                 }
1421                 init_stat_x(&real_sx);
1422                 real_sx.st = sx.st;
1423                 real_ret = statret;
1424                 if (file->flags & FLAG_DIR_CREATED)
1425                         statret = -1;
1426                 if (!preserve_perms) { /* See comment in non-dir code below. */
1427                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1428                                                dflt_perms, statret == 0);
1429                 }
1430                 if (statret != 0 && basis_dir[0] != NULL) {
1431                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1432                                               itemizing, code);
1433                         if (j == -2) {
1434                                 itemizing = 0;
1435                                 code = FNONE;
1436                                 statret = 1;
1437                         } else if (j >= 0) {
1438                                 statret = 1;
1439                                 fnamecmp = fnamecmpbuf;
1440                         }
1441                 }
1442                 if (itemizing && f_out != -1) {
1443                         itemize(fnamecmp, file, ndx, statret, &sx,
1444                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1445                 }
1446                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1447                         if (!relative_paths || errno != ENOENT
1448                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1449                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1450                                 rsyserr(FERROR_XFER, errno,
1451                                         "recv_generator: mkdir %s failed",
1452                                         full_fname(fname));
1453                           skipping_dir_contents:
1454                                 rprintf(FERROR,
1455                                     "*** Skipping any contents from this failed directory ***\n");
1456                                 skip_dir = file;
1457                                 file->flags |= FLAG_MISSING_DIR;
1458                                 goto cleanup;
1459                         }
1460                 }
1461
1462 #ifdef SUPPORT_XATTRS
1463                 if (preserve_xattrs && statret == 1)
1464                         copy_xattrs(fnamecmpbuf, fname);
1465 #endif
1466                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1467                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1468                         rprintf(code, "%s/\n", fname);
1469
1470                 /* We need to ensure that the dirs in the transfer have both
1471                  * readable and writable permissions during the time we are
1472                  * putting files within them.  This is then restored to the
1473                  * former permissions after the transfer is done. */
1474 #ifdef HAVE_CHMOD
1475                 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1476                         mode_t mode = file->mode | S_IRWXU;
1477                         if (do_chmod(fname, mode) < 0) {
1478                                 rsyserr(FERROR_XFER, errno,
1479                                         "failed to modify permissions on %s",
1480                                         full_fname(fname));
1481                         }
1482                         need_retouch_dir_perms = 1;
1483                 }
1484 #endif
1485
1486                 if (real_ret != 0 && one_file_system)
1487                         real_sx.st.st_dev = filesystem_dev;
1488                 if (inc_recurse) {
1489                         if (one_file_system) {
1490                                 uint32 *devp = F_DIR_DEV_P(file);
1491                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1492                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1493                         }
1494                 }
1495                 else if (delete_during && f_out != -1 && !phase
1496                     && !(file->flags & FLAG_MISSING_DIR)) {
1497                         if (file->flags & FLAG_CONTENT_DIR)
1498                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1499                         else
1500                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1501                 }
1502                 prior_dir_file = file;
1503                 goto cleanup;
1504         }
1505
1506         /* If we're not preserving permissions, change the file-list's
1507          * mode based on the local permissions and some heuristics. */
1508         if (!preserve_perms) {
1509                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1510                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1511                                        exists);
1512         }
1513
1514 #ifdef SUPPORT_HARD_LINKS
1515         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1516          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1517                 goto cleanup;
1518 #endif
1519
1520         if (preserve_links && S_ISLNK(file->mode)) {
1521 #ifdef SUPPORT_LINKS
1522                 const char *sl = F_SYMLINK(file);
1523                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1524                         if (INFO_GTE(NAME, 1)) {
1525                                 if (solo_file) {
1526                                         /* fname contains the destination path, but we
1527                                          * want to report the source path. */
1528                                         fname = f_name(file, NULL);
1529                                 }
1530                                 rprintf(FINFO,
1531                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1532                                         fname, sl);
1533                         }
1534                         goto cleanup;
1535                 }
1536                 if (statret == 0) {
1537                         char lnk[MAXPATHLEN];
1538                         int len;
1539
1540                         if (S_ISLNK(sx.st.st_mode)
1541                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1542                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1543                                 /* The link is pointing to the right place. */
1544                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1545                                 if (itemizing)
1546                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1547 #ifdef SUPPORT_HARD_LINKS
1548                                 if (preserve_hard_links && F_IS_HLINKED(file))
1549                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1550 #endif
1551                                 if (remove_source_files == 1)
1552                                         goto return_with_success;
1553                                 goto cleanup;
1554                         }
1555                 } else if (basis_dir[0] != NULL) {
1556                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1557                                               itemizing, code);
1558                         if (j == -2) {
1559 #ifndef CAN_HARDLINK_SYMLINK
1560                                 if (link_dest) {
1561                                         /* Resort to --copy-dest behavior. */
1562                                 } else
1563 #endif
1564                                 if (!copy_dest)
1565                                         goto cleanup;
1566                                 itemizing = 0;
1567                                 code = FNONE;
1568                         } else if (j >= 0) {
1569                                 statret = 1;
1570                                 fnamecmp = fnamecmpbuf;
1571                         }
1572                 }
1573                 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1574                         set_file_attrs(fname, file, NULL, NULL, 0);
1575                         if (itemizing) {
1576                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1577                                         statret = -1;
1578                                 itemize(fnamecmp, file, ndx, statret, &sx,
1579                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1580                         }
1581                         if (code != FNONE && INFO_GTE(NAME, 1))
1582                                 rprintf(code, "%s -> %s\n", fname, sl);
1583 #ifdef SUPPORT_HARD_LINKS
1584                         if (preserve_hard_links && F_IS_HLINKED(file))
1585                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1586 #endif
1587                         /* This does not check remove_source_files == 1
1588                          * because this is one of the items that the old
1589                          * --remove-sent-files option would remove. */
1590                         if (remove_source_files)
1591                                 goto return_with_success;
1592                 }
1593 #endif
1594                 goto cleanup;
1595         }
1596
1597         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1598          || (preserve_specials && IS_SPECIAL(file->mode))) {
1599                 dev_t rdev;
1600                 int del_for_flag = 0;
1601                 if (IS_DEVICE(file->mode)) {
1602                         uint32 *devp = F_RDEV_P(file);
1603                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1604                 } else
1605                         rdev = 0;
1606                 if (statret == 0) {
1607                         if (IS_DEVICE(file->mode)) {
1608                                 if (!IS_DEVICE(sx.st.st_mode))
1609                                         statret = -1;
1610                                 del_for_flag = DEL_FOR_DEVICE;
1611                         } else {
1612                                 if (!IS_SPECIAL(sx.st.st_mode))
1613                                         statret = -1;
1614                                 del_for_flag = DEL_FOR_SPECIAL;
1615                         }
1616                         if (statret == 0
1617                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1618                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1619                                 /* The device or special file is identical. */
1620                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1621                                 if (itemizing)
1622                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1623 #ifdef SUPPORT_HARD_LINKS
1624                                 if (preserve_hard_links && F_IS_HLINKED(file))
1625                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1626 #endif
1627                                 if (remove_source_files == 1)
1628                                         goto return_with_success;
1629                                 goto cleanup;
1630                         }
1631                 } else if (basis_dir[0] != NULL) {
1632                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1633                                               itemizing, code);
1634                         if (j == -2) {
1635 #ifndef CAN_HARDLINK_SPECIAL
1636                                 if (link_dest) {
1637                                         /* Resort to --copy-dest behavior. */
1638                                 } else
1639 #endif
1640                                 if (!copy_dest)
1641                                         goto cleanup;
1642                                 itemizing = 0;
1643                                 code = FNONE;
1644                         } else if (j >= 0) {
1645                                 statret = 1;
1646                                 fnamecmp = fnamecmpbuf;
1647                         }
1648                 }
1649                 if (DEBUG_GTE(GENR, 1)) {
1650                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1651                                 fname, (int)file->mode,
1652                                 (long)major(rdev), (long)minor(rdev));
1653                 }
1654                 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1655                         set_file_attrs(fname, file, NULL, NULL, 0);
1656                         if (itemizing) {
1657                                 itemize(fnamecmp, file, ndx, statret, &sx,
1658                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1659                         }
1660                         if (code != FNONE && INFO_GTE(NAME, 1))
1661                                 rprintf(code, "%s\n", fname);
1662 #ifdef SUPPORT_HARD_LINKS
1663                         if (preserve_hard_links && F_IS_HLINKED(file))
1664                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1665 #endif
1666                         if (remove_source_files == 1)
1667                                 goto return_with_success;
1668                 }
1669                 goto cleanup;
1670         }
1671
1672         if (!S_ISREG(file->mode)) {
1673                 if (solo_file)
1674                         fname = f_name(file, NULL);
1675                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1676                 goto cleanup;
1677         }
1678
1679         if (max_size >= 0 && F_LENGTH(file) > max_size) {
1680                 if (INFO_GTE(SKIP, 1)) {
1681                         if (solo_file)
1682                                 fname = f_name(file, NULL);
1683                         rprintf(FINFO, "%s is over max-size\n", fname);
1684                 }
1685                 goto cleanup;
1686         }
1687         if (min_size >= 0 && F_LENGTH(file) < min_size) {
1688                 if (INFO_GTE(SKIP, 1)) {
1689                         if (solo_file)
1690                                 fname = f_name(file, NULL);
1691                         rprintf(FINFO, "%s is under min-size\n", fname);
1692                 }
1693                 goto cleanup;
1694         }
1695
1696         if (update_only > 0 && statret == 0 && time_diff(&sx.st, file) > 0) {
1697                 if (INFO_GTE(SKIP, 1))
1698                         rprintf(FINFO, "%s is newer\n", fname);
1699 #ifdef SUPPORT_HARD_LINKS
1700                 if (F_IS_HLINKED(file))
1701                         handle_skipped_hlink(file, itemizing, code, f_out);
1702 #endif
1703                 goto cleanup;
1704         }
1705
1706         fnamecmp_type = FNAMECMP_FNAME;
1707
1708         if (statret == 0 && !(S_ISREG(sx.st.st_mode) || (write_devices && IS_DEVICE(sx.st.st_mode)))) {
1709                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1710                         goto cleanup;
1711                 statret = -1;
1712                 stat_errno = ENOENT;
1713         }
1714
1715         if (basis_dir[0] != NULL && (statret != 0 || !copy_dest)) {
1716                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1717                                       statret == 0, itemizing, code);
1718                 if (j == -2) {
1719                         if (remove_source_files == 1)
1720                                 goto return_with_success;
1721                         goto cleanup;
1722                 }
1723                 if (j >= 0) {
1724                         fnamecmp = fnamecmpbuf;
1725                         fnamecmp_type = j;
1726                         statret = 0;
1727                 }
1728         }
1729
1730         init_stat_x(&real_sx);
1731         real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1732         real_ret = statret;
1733
1734         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1735             && link_stat(partialptr, &partial_st, 0) == 0
1736             && S_ISREG(partial_st.st_mode)) {
1737                 if (statret != 0)
1738                         goto prepare_to_open;
1739         } else
1740                 partialptr = NULL;
1741
1742         if (statret != 0 && fuzzy_basis) {
1743                 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1744                 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1745                 if (fuzzy_file) {
1746                         f_name(fuzzy_file, fnamecmpbuf);
1747                         if (DEBUG_GTE(FUZZY, 1)) {
1748                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1749                                         fname, fnamecmpbuf);
1750                         }
1751                         sx.st.st_size = F_LENGTH(fuzzy_file);
1752                         statret = 0;
1753                         fnamecmp = fnamecmpbuf;
1754                 }
1755         }
1756
1757         if (statret != 0) {
1758 #ifdef SUPPORT_HARD_LINKS
1759                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1760                         cur_flist->in_progress++;
1761                         goto cleanup;
1762                 }
1763 #endif
1764                 if (stat_errno == ENOENT)
1765                         goto notify_others;
1766                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1767                         full_fname(fname));
1768                 goto cleanup;
1769         }
1770
1771         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1772                 ;
1773         else if (fnamecmp_type >= FNAMECMP_FUZZY)
1774                 ;
1775         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1776                 if (partialptr) {
1777                         do_unlink(partialptr);
1778                         handle_partial_dir(partialptr, PDIR_DELETE);
1779                 }
1780                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT | maybe_ATTRS_SET_NANO);
1781                 if (itemizing)
1782                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1783 #ifdef SUPPORT_HARD_LINKS
1784                 if (preserve_hard_links && F_IS_HLINKED(file))
1785                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1786 #endif
1787                 if (remove_source_files != 1)
1788                         goto cleanup;
1789           return_with_success:
1790                 if (!dry_run)
1791                         send_msg_int(MSG_SUCCESS, ndx);
1792                 goto cleanup;
1793         }
1794
1795         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1796 #ifdef SUPPORT_HARD_LINKS
1797                 if (F_IS_HLINKED(file))
1798                         handle_skipped_hlink(file, itemizing, code, f_out);
1799 #endif
1800                 goto cleanup;
1801         }
1802
1803   prepare_to_open:
1804         if (partialptr) {
1805                 sx.st = partial_st;
1806                 fnamecmp = partialptr;
1807                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1808                 statret = 0;
1809         }
1810
1811         if (!do_xfers)
1812                 goto notify_others;
1813
1814         if (read_batch || whole_file) {
1815                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1816                         if (!(backupptr = get_backup_name(fname)))
1817                                 goto cleanup;
1818                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1819                                 goto pretend_missing;
1820                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1821                                 unmake_file(back_file);
1822                                 back_file = NULL;
1823                                 goto cleanup;
1824                         }
1825                 }
1826                 goto notify_others;
1827         }
1828
1829         if (fuzzy_dirlist[0]) {
1830                 int j = flist_find(fuzzy_dirlist[0], file);
1831                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1832                         fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1833         }
1834
1835         /* open the file */
1836         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1837                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1838                         full_fname(fnamecmp));
1839           pretend_missing:
1840                 /* pretend the file didn't exist */
1841 #ifdef SUPPORT_HARD_LINKS
1842                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1843                         cur_flist->in_progress++;
1844                         goto cleanup;
1845                 }
1846 #endif
1847                 statret = real_ret = -1;
1848                 goto notify_others;
1849         }
1850
1851         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1852                 if (!(backupptr = get_backup_name(fname))) {
1853                         close(fd);
1854                         goto cleanup;
1855                 }
1856                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1857                         close(fd);
1858                         goto pretend_missing;
1859                 }
1860                 if (robust_unlink(backupptr) && errno != ENOENT) {
1861                         rsyserr(FERROR_XFER, errno, "unlink %s",
1862                                 full_fname(backupptr));
1863                         unmake_file(back_file);
1864                         back_file = NULL;
1865                         close(fd);
1866                         goto cleanup;
1867                 }
1868                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1869                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1870                         unmake_file(back_file);
1871                         back_file = NULL;
1872                         close(fd);
1873                         goto cleanup;
1874                 }
1875                 fnamecmp_type = FNAMECMP_BACKUP;
1876         }
1877
1878         if (DEBUG_GTE(DELTASUM, 3)) {
1879                 rprintf(FINFO, "gen mapped %s of size %s\n",
1880                         fnamecmp, big_num(sx.st.st_size));
1881         }
1882
1883         if (DEBUG_GTE(DELTASUM, 2))
1884                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1885
1886   notify_others:
1887         if (remove_source_files && !delay_updates && !phase && !dry_run)
1888                 increment_active_files(ndx, itemizing, code);
1889         if (inc_recurse && (!dry_run || write_batch < 0))
1890                 cur_flist->in_progress++;
1891 #ifdef SUPPORT_HARD_LINKS
1892         if (preserve_hard_links && F_IS_HLINKED(file))
1893                 file->flags |= FLAG_FILE_SENT;
1894 #endif
1895         write_ndx(f_out, ndx);
1896         if (itemizing) {
1897                 int iflags = ITEM_TRANSFER;
1898                 if (always_checksum > 0)
1899                         iflags |= ITEM_REPORT_CHANGE;
1900                 if (fnamecmp_type != FNAMECMP_FNAME)
1901                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1902                 if (fnamecmp_type >= FNAMECMP_FUZZY)
1903                         iflags |= ITEM_XNAME_FOLLOWS;
1904                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1905                         fuzzy_file ? fuzzy_file->basename : NULL);
1906                 free_stat_x(&real_sx);
1907         }
1908
1909         if (!do_xfers) {
1910 #ifdef SUPPORT_HARD_LINKS
1911                 if (preserve_hard_links && F_IS_HLINKED(file))
1912                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1913 #endif
1914                 goto cleanup;
1915         }
1916         if (read_batch)
1917                 goto cleanup;
1918
1919         if (statret != 0 || whole_file)
1920                 write_sum_head(f_out, NULL);
1921         else if (sx.st.st_size <= 0) {
1922                 write_sum_head(f_out, NULL);
1923                 close(fd);
1924         } else {
1925                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1926                         rprintf(FWARNING,
1927                             "WARNING: file is too large for checksum sending: %s\n",
1928                             fnamecmp);
1929                         write_sum_head(f_out, NULL);
1930                 }
1931                 close(fd);
1932         }
1933
1934   cleanup:
1935         if (back_file) {
1936                 int save_preserve_xattrs = preserve_xattrs;
1937                 if (f_copy >= 0)
1938                         close(f_copy);
1939 #ifdef SUPPORT_XATTRS
1940                 if (preserve_xattrs) {
1941                         copy_xattrs(fname, backupptr);
1942                         preserve_xattrs = 0;
1943                 }
1944 #endif
1945                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1946                 preserve_xattrs = save_preserve_xattrs;
1947                 if (INFO_GTE(BACKUP, 1)) {
1948                         rprintf(FINFO, "backed up %s to %s\n",
1949                                 fname, backupptr);
1950                 }
1951                 unmake_file(back_file);
1952         }
1953
1954         free_stat_x(&sx);
1955 }
1956
1957 /* If we are replacing an existing hard link, symlink, device, or special file,
1958  * create a temp-name item and rename it into place.  A symlimk specifies slnk,
1959  * a hard link specifies hlnk, otherwise we create a device based on rdev.
1960  * Specify 0 for the del_for_flag if there is not a file to replace.  This
1961  * returns 1 on success and 0 on failure. */
1962 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1963                   dev_t rdev, stat_x *sxp, int del_for_flag)
1964 {
1965         char tmpname[MAXPATHLEN];
1966         const char *create_name;
1967         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1968
1969         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1970                 skip_atomic = 1;
1971         else
1972                 skip_atomic = 0;
1973
1974         if (del_for_flag) {
1975                 if (make_backups > 0 && !dir_in_the_way) {
1976                         if (!make_backup(fname, skip_atomic))
1977                                 return 0;
1978                 } else if (skip_atomic) {
1979                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1980                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1981                                 return 0;
1982                 }
1983         }
1984
1985         create_name = skip_atomic ? fname : tmpname;
1986
1987         if (slnk) {
1988 #ifdef SUPPORT_LINKS
1989                 if (do_symlink(slnk, create_name) < 0) {
1990                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1991                                 full_fname(create_name), slnk);
1992                         return 0;
1993                 }
1994 #else
1995                 return 0;
1996 #endif
1997         } else if (hlnk) {
1998 #ifdef SUPPORT_HARD_LINKS
1999                 if (!hard_link_one(file, create_name, hlnk, 0))
2000                         return 0;
2001 #else
2002                 return 0;
2003 #endif
2004         } else {
2005                 if (do_mknod(create_name, file->mode, rdev) < 0) {
2006                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
2007                                 full_fname(create_name));
2008                         return 0;
2009                 }
2010         }
2011
2012         if (!skip_atomic) {
2013                 if (do_rename(tmpname, fname) < 0) {
2014                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
2015                                 full_fname(tmpname), full_fname(fname));
2016                         do_unlink(tmpname);
2017                         return 0;
2018                 }
2019         }
2020
2021         return 1;
2022 }
2023
2024 #ifdef SUPPORT_HARD_LINKS
2025 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2026                                  enum logcode code, int f_out)
2027 {
2028         char fbuf[MAXPATHLEN];
2029         int new_last_ndx;
2030         struct file_list *save_flist = cur_flist;
2031
2032         /* If we skip the last item in a chain of links and there was a
2033          * prior non-skipped hard-link waiting to finish, finish it now. */
2034         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2035                 return;
2036
2037         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2038         cur_flist->in_progress--; /* undo prior increment */
2039         f_name(file, fbuf);
2040         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2041
2042         cur_flist = save_flist;
2043 }
2044 #endif
2045
2046 static void touch_up_dirs(struct file_list *flist, int ndx)
2047 {
2048         static int counter = 0;
2049         struct file_struct *file;
2050         char *fname;
2051         BOOL fix_dir_perms;
2052         int i, start, end;
2053
2054         if (ndx < 0) {
2055                 start = 0;
2056                 end = flist->used - 1;
2057         } else
2058                 start = end = ndx;
2059
2060         /* Fix any directory permissions that were modified during the
2061          * transfer and/or re-set any tweaked modified-time values. */
2062         for (i = start; i <= end; i++, counter++) {
2063                 file = flist->files[i];
2064                 if (!F_IS_ACTIVE(file))
2065                         continue;
2066                 if (!S_ISDIR(file->mode)
2067                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2068                         continue;
2069                 if (DEBUG_GTE(TIME, 2)) {
2070                         fname = f_name(file, NULL);
2071                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2072                                 NS(fname), i);
2073                 }
2074                 /* Be sure not to retouch permissions with --fake-super. */
2075                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2076                 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2077                         continue;
2078                 fname = f_name(file, NULL);
2079                 if (fix_dir_perms)
2080                         do_chmod(fname, file->mode);
2081                 if (need_retouch_dir_times) {
2082                         STRUCT_STAT st;
2083                         if (link_stat(fname, &st, 0) == 0 && time_diff(&st, file)) {
2084                                 st.st_mtime = file->modtime;
2085 #ifdef ST_MTIME_NSEC
2086                                 st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file);
2087 #endif
2088                                 set_times(fname, &st);
2089                         }
2090                 }
2091                 if (counter >= loopchk_limit) {
2092                         if (allowed_lull)
2093                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2094                         else
2095                                 maybe_flush_socket(0);
2096                         counter = 0;
2097                 }
2098         }
2099 }
2100
2101 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2102 {
2103         struct file_struct *file;
2104         struct file_list *flist;
2105         char fbuf[MAXPATHLEN];
2106         int ndx;
2107
2108         while (1) {
2109 #ifdef SUPPORT_HARD_LINKS
2110                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2111                         int send_failed = (ndx == -2);
2112                         if (send_failed)
2113                                 ndx = get_hlink_num();
2114                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2115                         file = flist->files[ndx - flist->ndx_start];
2116                         assert(file->flags & FLAG_HLINKED);
2117                         if (send_failed)
2118                                 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2119                         else
2120                                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2121                         flist->in_progress--;
2122                         continue;
2123                 }
2124 #endif
2125
2126                 if (check_redo && (ndx = get_redo_num()) != -1) {
2127                         OFF_T save_max_size = max_size;
2128                         OFF_T save_min_size = min_size;
2129                         csum_length = SUM_LENGTH;
2130                         max_size = -1;
2131                         min_size = -1;
2132                         ignore_existing = -ignore_existing;
2133                         ignore_non_existing = -ignore_non_existing;
2134                         update_only = -update_only;
2135                         always_checksum = -always_checksum;
2136                         size_only = -size_only;
2137                         append_mode = -append_mode;
2138                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2139                         ignore_times++;
2140
2141                         flist = cur_flist;
2142                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2143
2144                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2145                         if (solo_file)
2146                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2147                         else
2148                                 f_name(file, fbuf);
2149                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2150                         cur_flist->to_redo--;
2151
2152                         cur_flist = flist;
2153
2154                         csum_length = SHORT_SUM_LENGTH;
2155                         max_size = save_max_size;
2156                         min_size = save_min_size;
2157                         ignore_existing = -ignore_existing;
2158                         ignore_non_existing = -ignore_non_existing;
2159                         update_only = -update_only;
2160                         always_checksum = -always_checksum;
2161                         size_only = -size_only;
2162                         append_mode = -append_mode;
2163                         make_backups = -make_backups;
2164                         ignore_times--;
2165                         continue;
2166                 }
2167
2168                 if (cur_flist == first_flist)
2169                         break;
2170
2171                 /* We only get here if inc_recurse is enabled. */
2172                 if (first_flist->in_progress || first_flist->to_redo)
2173                         break;
2174
2175                 write_ndx(sock_f_out, NDX_DONE);
2176                 if (!read_batch && !flist_eof) {
2177                         int old_total = 0;
2178                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2179                                 old_total += flist->used;
2180                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2181                 }
2182
2183                 if (delete_during == 2 || !dir_tweaking) {
2184                         /* Skip directory touch-up. */
2185                 } else if (first_flist->parent_ndx >= 0)
2186                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2187
2188                 flist_free(first_flist); /* updates first_flist */
2189         }
2190 }
2191
2192 void generate_files(int f_out, const char *local_name)
2193 {
2194         int i, ndx, next_loopchk = 0;
2195         char fbuf[MAXPATHLEN];
2196         int itemizing;
2197         enum logcode code;
2198         int save_info_flist = info_levels[INFO_FLIST];
2199         int save_info_progress = info_levels[INFO_PROGRESS];
2200
2201         if (protocol_version >= 29) {
2202                 itemizing = 1;
2203                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2204                 code = logfile_format_has_i ? FNONE : FLOG;
2205         } else if (am_daemon) {
2206                 itemizing = logfile_format_has_i && do_xfers;
2207                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2208                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2209         } else if (!am_server) {
2210                 itemizing = stdout_format_has_i;
2211                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2212                 code = itemizing ? FNONE : FINFO;
2213         } else {
2214                 itemizing = 0;
2215                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2216                 code = FINFO;
2217         }
2218         solo_file = local_name;
2219         dir_tweaking = !(list_only || solo_file || dry_run);
2220         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2221         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2222         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2223             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2224         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2225
2226         if (DEBUG_GTE(GENR, 1))
2227                 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2228
2229         if (delete_before && !solo_file && cur_flist->used > 0)
2230                 do_delete_pass();
2231         if (delete_during == 2) {
2232                 deldelay_size = BIGPATHBUFLEN * 4;
2233                 deldelay_buf = new_array(char, deldelay_size);
2234                 if (!deldelay_buf)
2235                         out_of_memory("delete-delay");
2236         }
2237         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2238
2239         if (append_mode > 0 || whole_file < 0)
2240                 whole_file = 0;
2241         if (DEBUG_GTE(FLIST, 1)) {
2242                 rprintf(FINFO, "delta-transmission %s\n",
2243                         whole_file
2244                         ? "disabled for local transfer or --whole-file"
2245                         : "enabled");
2246         }
2247
2248         dflt_perms = (ACCESSPERMS & ~orig_umask);
2249
2250         do {
2251 #ifdef SUPPORT_HARD_LINKS
2252                 if (preserve_hard_links && inc_recurse) {
2253                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2254                                 wait_for_receiver();
2255                 }
2256 #endif
2257
2258                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2259                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2260                         if (solo_file)
2261                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2262                         else
2263                                 f_name(fp, fbuf);
2264                         ndx = cur_flist->ndx_start - 1;
2265                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2266                         if (delete_during && dry_run < 2 && !list_only
2267                          && !(fp->flags & FLAG_MISSING_DIR)) {
2268                                 if (fp->flags & FLAG_CONTENT_DIR) {
2269                                         dev_t dirdev;
2270                                         if (one_file_system) {
2271                                                 uint32 *devp = F_DIR_DEV_P(fp);
2272                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2273                                         } else
2274                                                 dirdev = MAKEDEV(0, 0);
2275                                         delete_in_dir(fbuf, fp, &dirdev);
2276                                 } else
2277                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2278                         }
2279                 }
2280                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2281                         struct file_struct *file = cur_flist->sorted[i];
2282
2283                         if (!F_IS_ACTIVE(file))
2284                                 continue;
2285
2286                         if (unsort_ndx)
2287                                 ndx = F_NDX(file);
2288                         else
2289                                 ndx = i + cur_flist->ndx_start;
2290
2291                         if (solo_file)
2292                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2293                         else
2294                                 f_name(file, fbuf);
2295                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2296
2297                         check_for_finished_files(itemizing, code, 0);
2298
2299                         if (i + cur_flist->ndx_start >= next_loopchk) {
2300                                 if (allowed_lull)
2301                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2302                                 else
2303                                         maybe_flush_socket(0);
2304                                 next_loopchk += loopchk_limit;
2305                         }
2306                 }
2307
2308                 if (!inc_recurse) {
2309                         write_ndx(f_out, NDX_DONE);
2310                         break;
2311                 }
2312
2313                 while (1) {
2314                         check_for_finished_files(itemizing, code, 1);
2315                         if (cur_flist->next || flist_eof)
2316                                 break;
2317                         wait_for_receiver();
2318                 }
2319         } while ((cur_flist = cur_flist->next) != NULL);
2320
2321         if (delete_during)
2322                 delete_in_dir(NULL, NULL, &dev_zero);
2323         phase++;
2324         if (DEBUG_GTE(GENR, 1))
2325                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2326
2327         while (1) {
2328                 check_for_finished_files(itemizing, code, 1);
2329                 if (msgdone_cnt)
2330                         break;
2331                 wait_for_receiver();
2332         }
2333
2334         phase++;
2335         if (DEBUG_GTE(GENR, 1))
2336                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2337
2338         write_ndx(f_out, NDX_DONE);
2339
2340         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2341         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2342                 write_ndx(f_out, NDX_DONE);
2343
2344         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2345                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2346                         write_del_stats(f_out);
2347                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2348                         write_ndx(f_out, NDX_DONE);
2349         }
2350
2351         /* Read MSG_DONE for the redo phase (and any prior messages). */
2352         while (1) {
2353                 check_for_finished_files(itemizing, code, 0);
2354                 if (msgdone_cnt > 1)
2355                         break;
2356                 wait_for_receiver();
2357         }
2358
2359         if (protocol_version >= 29) {
2360                 phase++;
2361                 if (DEBUG_GTE(GENR, 1))
2362                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2363                 if (!EARLY_DELAY_DONE_MSG()) {
2364                         write_ndx(f_out, NDX_DONE);
2365                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2366                                 write_ndx(f_out, NDX_DONE);
2367                 }
2368                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2369                 while (msgdone_cnt == 2)
2370                         wait_for_receiver();
2371         }
2372
2373         info_levels[INFO_FLIST] = save_info_flist;
2374         info_levels[INFO_PROGRESS] = save_info_progress;
2375
2376         if (delete_during == 2)
2377                 do_delayed_deletions(fbuf);
2378         if (delete_after && !solo_file && file_total > 0)
2379                 do_delete_pass();
2380
2381         if (max_delete >= 0 && skipped_deletes) {
2382                 rprintf(FWARNING,
2383                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2384                         skipped_deletes);
2385                 io_error |= IOERR_DEL_LIMIT;
2386         }
2387
2388         if (protocol_version >= 31) {
2389                 if (!EARLY_DELETE_DONE_MSG()) {
2390                         if (INFO_GTE(STATS, 2) || read_batch)
2391                                 write_del_stats(f_out);
2392                         write_ndx(f_out, NDX_DONE);
2393                 }
2394
2395                 /* Read MSG_DONE for late-delete phase & prior messages. */
2396                 while (msgdone_cnt == 3)
2397                         wait_for_receiver();
2398         }
2399
2400         if ((need_retouch_dir_perms || need_retouch_dir_times)
2401          && dir_tweaking && (!inc_recurse || delete_during == 2))
2402                 touch_up_dirs(dir_flist, -1);
2403
2404         if (DEBUG_GTE(GENR, 1))
2405                 rprintf(FINFO, "generate_files finished\n");
2406 }