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) 2003-2009 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "inums.h"
  25 #include "ifuncs.h"
  26
  27 extern int dry_run;
  28 extern int do_xfers;
  29 extern int stdout_format_has_i;
  30 extern int logfile_format_has_i;
  31 extern int am_root;
  32 extern int am_server;
  33 extern int am_daemon;
  34 extern int inc_recurse;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_acls;
  39 extern int preserve_xattrs;
  40 extern int preserve_links;
  41 extern int preserve_devices;
  42 extern int preserve_specials;
  43 extern int preserve_hard_links;
  44 extern int preserve_executability;
  45 extern int preserve_perms;
  46 extern int preserve_times;
  47 extern int uid_ndx;
  48 extern int gid_ndx;
  49 extern int delete_mode;
  50 extern int delete_before;
  51 extern int delete_during;
  52 extern int delete_after;
  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 inplace;
  62 extern int append_mode;
  63 extern int make_backups;
  64 extern int csum_length;
  65 extern int ignore_times;
  66 extern int size_only;
  67 extern OFF_T max_size;
  68 extern OFF_T min_size;
  69 extern int io_error;
  70 extern int flist_eof;
  71 extern int allowed_lull;
  72 extern int sock_f_out;
  73 extern int ignore_timeout;
  74 extern int protocol_version;
  75 extern int file_total;
  76 extern int fuzzy_basis;
  77 extern int always_checksum;
  78 extern int checksum_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 safe_symlinks;
  87 extern long block_size; /* "long" because popt can't set an int32. */
  88 extern int unsort_ndx;
  89 extern int max_delete;
  90 extern int force_delete;
  91 extern int one_file_system;
  92 extern int skipped_deletes;
  93 extern struct stats stats;
  94 extern dev_t filesystem_dev;
  95 extern mode_t orig_umask;
  96 extern uid_t our_uid;
  97 extern char *basis_dir[MAX_BASIS_DIRS+1];
  98 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  99 extern struct filter_list_struct daemon_filter_list;
 100
 101 int maybe_ATTRS_REPORT = 0;
 102
 103 static dev_t dev_zero;
 104 static int deldelay_size = 0, deldelay_cnt = 0;
 105 static char *deldelay_buf = NULL;
 106 static int deldelay_fd = -1;
 107 static int loopchk_limit;
 108 static int dir_tweaking;
 109 static int symlink_timeset_failed_flags;
 110 static int need_retouch_dir_times;
 111 static int need_retouch_dir_perms;
 112 static const char *solo_file = NULL;
 113
 114 enum nonregtype {
 115     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 116 };
 117
 118 /* Forward declarations. */
 119 #ifdef SUPPORT_HARD_LINKS
 120 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 121                                  enum logcode code, int f_out);
 122 #endif
 123
 124 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
 125 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
 126
 127 static int start_delete_delay_temp(void)
 128 {
 129         char fnametmp[MAXPATHLEN];
 130         int save_dry_run = dry_run;
 131
 132         dry_run = 0;
 133         if (!get_tmpname(fnametmp, "deldelay")
 134          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 135                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 136                         inc_recurse ? "" : " -- switching to --delete-after");
 137                 delete_during = 0;
 138                 delete_after = !inc_recurse;
 139                 dry_run = save_dry_run;
 140                 return 0;
 141         }
 142         unlink(fnametmp);
 143         dry_run = save_dry_run;
 144         return 1;
 145 }
 146
 147 static int flush_delete_delay(void)
 148 {
 149         if (deldelay_fd < 0 && !start_delete_delay_temp())
 150                 return 0;
 151         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 152                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 153                 delete_during = 0;
 154                 delete_after = !inc_recurse;
 155                 close(deldelay_fd);
 156                 return 0;
 157         }
 158         deldelay_cnt = 0;
 159         return 1;
 160 }
 161
 162 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 163 {
 164         int len;
 165
 166         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 167                 return 0;
 168
 169         if (flags & DEL_NO_UID_WRITE)
 170                 deldelay_buf[deldelay_cnt++] = '!';
 171
 172         while (1) {
 173                 len = snprintf(deldelay_buf + deldelay_cnt,
 174                                deldelay_size - deldelay_cnt,
 175                                "%x %s%c",
 176                                (int)file->mode, fname, '\0');
 177                 if ((deldelay_cnt += len) <= deldelay_size)
 178                         break;
 179                 deldelay_cnt -= len;
 180                 if (!flush_delete_delay())
 181                         return 0;
 182         }
 183
 184         return 1;
 185 }
 186
 187 static int read_delay_line(char *buf, int *flags_p)
 188 {
 189         static int read_pos = 0;
 190         int j, len, mode;
 191         char *bp, *past_space;
 192
 193         while (1) {
 194                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 195                 if (j < deldelay_cnt)
 196                         break;
 197                 if (deldelay_fd < 0) {
 198                         if (j > read_pos)
 199                                 goto invalid_data;
 200                         return -1;
 201                 }
 202                 deldelay_cnt -= read_pos;
 203                 if (deldelay_cnt == deldelay_size)
 204                         goto invalid_data;
 205                 if (deldelay_cnt && read_pos) {
 206                         memmove(deldelay_buf, deldelay_buf + read_pos,
 207                                 deldelay_cnt);
 208                 }
 209                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 210                            deldelay_size - deldelay_cnt);
 211                 if (len == 0) {
 212                         if (deldelay_cnt) {
 213                                 rprintf(FERROR,
 214                                     "ERROR: unexpected EOF in delete-delay file.\n");
 215                         }
 216                         return -1;
 217                 }
 218                 if (len < 0) {
 219                         rsyserr(FERROR, errno,
 220                                 "reading delete-delay file");
 221                         return -1;
 222                 }
 223                 deldelay_cnt += len;
 224                 read_pos = 0;
 225         }
 226
 227         bp = deldelay_buf + read_pos;
 228         if (*bp == '!') {
 229                 bp++;
 230                 *flags_p = DEL_NO_UID_WRITE;
 231         } else
 232                 *flags_p = 0;
 233
 234         if (sscanf(bp, "%x ", &mode) != 1) {
 235           invalid_data:
 236                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 237                 return -1;
 238         }
 239         past_space = strchr(bp, ' ') + 1;
 240         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 241         read_pos = j + 1;
 242
 243         if (len > MAXPATHLEN) {
 244                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 245                 return -1;
 246         }
 247
 248         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 249          * instead of returning a pointer to our buffer. */
 250         memcpy(buf, past_space, len);
 251
 252         return mode;
 253 }
 254
 255 static void do_delayed_deletions(char *delbuf)
 256 {
 257         int mode, flags;
 258
 259         if (deldelay_fd >= 0) {
 260                 if (deldelay_cnt && !flush_delete_delay())
 261                         return;
 262                 lseek(deldelay_fd, 0, 0);
 263         }
 264         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 265                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 266         if (deldelay_fd >= 0)
 267                 close(deldelay_fd);
 268 }
 269
 270 /* This function is used to implement per-directory deletion, and is used by
 271  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 272  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 273  * call will append names onto the end, but the old dir value will be restored
 274  * on exit). */
 275 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 276 {
 277         static int already_warned = 0;
 278         struct file_list *dirlist;
 279         char delbuf[MAXPATHLEN];
 280         int dlen, i;
 281         int save_uid_ndx = uid_ndx;
 282
 283         if (!fbuf) {
 284                 change_local_filter_dir(NULL, 0, 0);
 285                 return;
 286         }
 287
 288         if (DEBUG_GTE(DEL, 2))
 289                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 290
 291         if (allowed_lull)
 292                 maybe_send_keepalive();
 293
 294         if (io_error && !ignore_errors) {
 295                 if (already_warned)
 296                         return;
 297                 rprintf(FINFO,
 298                         "IO error encountered -- skipping file deletion\n");
 299                 already_warned = 1;
 300                 return;
 301         }
 302
 303         dlen = strlen(fbuf);
 304         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 305
 306         if (one_file_system) {
 307                 if (file->flags & FLAG_TOP_DIR)
 308                         filesystem_dev = *fs_dev;
 309                 else if (filesystem_dev != *fs_dev)
 310                         return;
 311         }
 312
 313         if (!uid_ndx)
 314                 uid_ndx = ++file_extra_cnt;
 315
 316         dirlist = get_dirlist(fbuf, dlen, 0);
 317
 318         /* If an item in dirlist is not found in flist, delete it
 319          * from the filesystem. */
 320         for (i = dirlist->used; i--; ) {
 321                 struct file_struct *fp = dirlist->files[i];
 322                 if (!F_IS_ACTIVE(fp))
 323                         continue;
 324                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 325                         if (INFO_GTE(MOUNT, 1))
 326                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 327                                         f_name(fp, NULL));
 328                         continue;
 329                 }
 330                 /* Here we want to match regardless of file type.  Replacement
 331                  * of a file with one of another type is handled separately by
 332                  * a delete_item call with a DEL_MAKE_ROOM flag. */
 333                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
 334                         int flags = DEL_RECURSE;
 335                         if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 336                                 flags |= DEL_NO_UID_WRITE;
 337                         f_name(fp, delbuf);
 338                         if (delete_during == 2) {
 339                                 if (!remember_delete(fp, delbuf, flags))
 340                                         break;
 341                         } else
 342                                 delete_item(delbuf, fp->mode, flags);
 343                 }
 344         }
 345
 346         flist_free(dirlist);
 347
 348         if (!save_uid_ndx) {
 349                 --file_extra_cnt;
 350                 uid_ndx = 0;
 351         }
 352 }
 353
 354 /* This deletes any files on the receiving side that are not present on the
 355  * sending side.  This is used by --delete-before and --delete-after. */
 356 static void do_delete_pass(void)
 357 {
 358         char fbuf[MAXPATHLEN];
 359         STRUCT_STAT st;
 360         int j;
 361
 362         /* dry_run is incremented when the destination doesn't exist yet. */
 363         if (dry_run > 1 || list_only)
 364                 return;
 365
 366         for (j = 0; j < cur_flist->used; j++) {
 367                 struct file_struct *file = cur_flist->sorted[j];
 368
 369                 f_name(file, fbuf);
 370
 371                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 372                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 373                         continue;
 374                 }
 375
 376                 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
 377                         rprintf(FINFO, "deleting in %s\n", fbuf);
 378
 379                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 380                  || !S_ISDIR(st.st_mode))
 381                         continue;
 382
 383                 delete_in_dir(fbuf, file, &st.st_dev);
 384         }
 385         delete_in_dir(NULL, NULL, &dev_zero);
 386
 387         if (INFO_GTE(FLIST, 2) && !am_server)
 388                 rprintf(FINFO, "                    \r");
 389 }
 390
 391 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 392 {
 393 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
 394         if (S_ISLNK(file->mode)) {
 395                 ;
 396         } else
 397 #endif
 398         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 399                 return 0;
 400
 401         if (preserve_perms) {
 402                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 403                         return 0;
 404         } else if (preserve_executability
 405          && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 406                 return 0;
 407
 408         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 409                 return 0;
 410
 411         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 412                 return 0;
 413
 414 #ifdef SUPPORT_ACLS
 415         if (preserve_acls && !S_ISLNK(file->mode)) {
 416                 if (!ACL_READY(*sxp))
 417                         get_acl(fname, sxp);
 418                 if (set_acl(NULL, file, sxp) == 0)
 419                         return 0;
 420         }
 421 #endif
 422 #ifdef SUPPORT_XATTRS
 423         if (preserve_xattrs) {
 424                 if (!XATTR_READY(*sxp))
 425                         get_xattr(fname, sxp);
 426                 if (xattr_diff(file, sxp, 0))
 427                         return 0;
 428         }
 429 #endif
 430
 431         return 1;
 432 }
 433
 434 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 435              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 436              const char *xname)
 437 {
 438         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 439                 int keep_time = !preserve_times ? 0
 440                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 441 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 442                     1;
 443 #else
 444                     !S_ISLNK(file->mode);
 445 #endif
 446
 447                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 448                         iflags |= ITEM_REPORT_SIZE;
 449                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 450                         if (iflags & ITEM_LOCAL_CHANGE)
 451                                 iflags |= symlink_timeset_failed_flags;
 452                 } else if (keep_time
 453                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 454                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 455                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 456                         iflags |= ITEM_REPORT_TIME;
 457 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 458                 if (S_ISLNK(file->mode)) {
 459                         ;
 460                 } else
 461 #endif
 462                 if (preserve_perms) {
 463                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 464                                 iflags |= ITEM_REPORT_PERMS;
 465                 } else if (preserve_executability
 466                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 467                         iflags |= ITEM_REPORT_PERMS;
 468                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 469                         iflags |= ITEM_REPORT_OWNER;
 470                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 471                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 472                         iflags |= ITEM_REPORT_GROUP;
 473 #ifdef SUPPORT_ACLS
 474                 if (preserve_acls && !S_ISLNK(file->mode)) {
 475                         if (!ACL_READY(*sxp))
 476                                 get_acl(fnamecmp, sxp);
 477                         if (set_acl(NULL, file, sxp) == 0)
 478                                 iflags |= ITEM_REPORT_ACL;
 479                 }
 480 #endif
 481 #ifdef SUPPORT_XATTRS
 482                 if (preserve_xattrs) {
 483                         if (!XATTR_READY(*sxp))
 484                                 get_xattr(fnamecmp, sxp);
 485                         if (xattr_diff(file, sxp, 1))
 486                                 iflags |= ITEM_REPORT_XATTR;
 487                 }
 488 #endif
 489         } else {
 490 #ifdef SUPPORT_XATTRS
 491                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 492                         iflags |= ITEM_REPORT_XATTR;
 493 #endif
 494                 iflags |= ITEM_IS_NEW;
 495         }
 496
 497         iflags &= 0xffff;
 498         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
 499           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 500                 if (protocol_version >= 29) {
 501                         if (ndx >= 0)
 502                                 write_ndx(sock_f_out, ndx);
 503                         write_shortint(sock_f_out, iflags);
 504                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 505                                 write_byte(sock_f_out, fnamecmp_type);
 506                         if (iflags & ITEM_XNAME_FOLLOWS)
 507                                 write_vstring(sock_f_out, xname, strlen(xname));
 508 #ifdef SUPPORT_XATTRS
 509                         if (preserve_xattrs && !dry_run
 510                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 511                                 send_xattr_request(NULL, file,
 512                                         iflags & ITEM_REPORT_XATTR ? sock_f_out : -1);
 513                         }
 514 #endif
 515                 } else if (ndx >= 0) {
 516                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 517                         log_item(code, file, &stats, iflags, xname);
 518                 }
 519         }
 520 }
 521
 522
 523 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 524 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 525 {
 526         if (st->st_size != F_LENGTH(file))
 527                 return 0;
 528
 529         /* if always checksum is set then we use the checksum instead
 530            of the file time to determine whether to sync */
 531         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 532                 char sum[MAX_DIGEST_LEN];
 533                 file_checksum(fn, sum, st->st_size);
 534                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 535         }
 536
 537         if (size_only > 0)
 538                 return 1;
 539
 540         if (ignore_times)
 541                 return 0;
 542
 543         return cmp_time(st->st_mtime, file->modtime) == 0;
 544 }
 545
 546
 547 /*
 548  * set (initialize) the size entries in the per-file sum_struct
 549  * calculating dynamic block and checksum sizes.
 550  *
 551  * This is only called from generate_and_send_sums() but is a separate
 552  * function to encapsulate the logic.
 553  *
 554  * The block size is a rounded square root of file length.
 555  *
 556  * The checksum size is determined according to:
 557  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 558  * provided by Donovan Baarda which gives a probability of rsync
 559  * algorithm corrupting data and falling back using the whole md4
 560  * checksums.
 561  *
 562  * This might be made one of several selectable heuristics.
 563  */
 564 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 565 {
 566         int32 blength;
 567         int s2length;
 568         int64 l;
 569
 570         if (block_size)
 571                 blength = block_size;
 572         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 573                 blength = BLOCK_SIZE;
 574         else {
 575                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 576                 int32 c;
 577                 int cnt;
 578                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 579                 if (c < 0 || c >= max_blength)
 580                         blength = max_blength;
 581                 else {
 582                     blength = 0;
 583                     do {
 584                             blength |= c;
 585                             if (len < (int64)blength * blength)
 586                                     blength &= ~c;
 587                             c >>= 1;
 588                     } while (c >= 8);   /* round to multiple of 8 */
 589                     blength = MAX(blength, BLOCK_SIZE);
 590                 }
 591         }
 592
 593         if (protocol_version < 27) {
 594                 s2length = csum_length;
 595         } else if (csum_length == SUM_LENGTH) {
 596                 s2length = SUM_LENGTH;
 597         } else {
 598                 int32 c;
 599                 int b = BLOCKSUM_BIAS;
 600                 for (l = len; l >>= 1; b += 2) {}
 601                 for (c = blength; (c >>= 1) && b; b--) {}
 602                 /* add a bit, subtract rollsum, round up. */
 603                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 604                 s2length = MAX(s2length, csum_length);
 605                 s2length = MIN(s2length, SUM_LENGTH);
 606         }
 607
 608         sum->flength    = len;
 609         sum->blength    = blength;
 610         sum->s2length   = s2length;
 611         sum->remainder  = (int32)(len % blength);
 612         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 613
 614         if ((int64)sum->count != l)
 615                 sum->count = -1;
 616
 617         if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
 618                 rprintf(FINFO,
 619                         "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
 620                         big_num(sum->count), (long)sum->remainder, (long)sum->blength,
 621                         sum->s2length, big_num(sum->flength));
 622         }
 623 }
 624
 625
 626 /*
 627  * Generate and send a stream of signatures/checksums that describe a buffer
 628  *
 629  * Generate approximately one checksum every block_len bytes.
 630  */
 631 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 632 {
 633         int32 i;
 634         struct map_struct *mapbuf;
 635         struct sum_struct sum;
 636         OFF_T offset = 0;
 637
 638         sum_sizes_sqroot(&sum, len);
 639         if (sum.count < 0)
 640                 return -1;
 641         write_sum_head(f_out, &sum);
 642
 643         if (append_mode > 0 && f_copy < 0)
 644                 return 0;
 645
 646         if (len > 0)
 647                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 648         else
 649                 mapbuf = NULL;
 650
 651         for (i = 0; i < sum.count; i++) {
 652                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 653                 char *map = map_ptr(mapbuf, offset, n1);
 654                 char sum2[SUM_LENGTH];
 655                 uint32 sum1;
 656
 657                 len -= n1;
 658                 offset += n1;
 659
 660                 if (f_copy >= 0) {
 661                         full_write(f_copy, map, n1);
 662                         if (append_mode > 0)
 663                                 continue;
 664                 }
 665
 666                 sum1 = get_checksum1(map, n1);
 667                 get_checksum2(map, n1, sum2);
 668
 669                 if (DEBUG_GTE(DELTASUM, 3)) {
 670                         rprintf(FINFO,
 671                                 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
 672                                 big_num(i), big_num(offset - n1), (long)n1,
 673                                 (unsigned long)sum1);
 674                 }
 675                 write_int(f_out, sum1);
 676                 write_buf(f_out, sum2, sum.s2length);
 677         }
 678
 679         if (mapbuf)
 680                 unmap_file(mapbuf);
 681
 682         return 0;
 683 }
 684
 685
 686 /* Try to find a filename in the same dir as "fname" with a similar name. */
 687 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 688 {
 689         int fname_len, fname_suf_len;
 690         const char *fname_suf, *fname = file->basename;
 691         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 692         int j, lowest_j = -1;
 693
 694         fname_len = strlen(fname);
 695         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 696
 697         for (j = 0; j < dirlist->used; j++) {
 698                 struct file_struct *fp = dirlist->files[j];
 699                 const char *suf, *name;
 700                 int len, suf_len;
 701                 uint32 dist;
 702
 703                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 704                  || fp->flags & FLAG_FILE_SENT)
 705                         continue;
 706
 707                 name = fp->basename;
 708
 709                 if (F_LENGTH(fp) == F_LENGTH(file)
 710                     && cmp_time(fp->modtime, file->modtime) == 0) {
 711                         if (DEBUG_GTE(FUZZY, 2)) {
 712                                 rprintf(FINFO,
 713                                         "fuzzy size/modtime match for %s\n",
 714                                         name);
 715                         }
 716                         return j;
 717                 }
 718
 719                 len = strlen(name);
 720                 suf = find_filename_suffix(name, len, &suf_len);
 721
 722                 dist = fuzzy_distance(name, len, fname, fname_len);
 723                 /* Add some extra weight to how well the suffixes match. */
 724                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 725                       * 10;
 726                 if (DEBUG_GTE(FUZZY, 2)) {
 727                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 728                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 729                 }
 730                 if (dist <= lowest_dist) {
 731                         lowest_dist = dist;
 732                         lowest_j = j;
 733                 }
 734         }
 735
 736         return lowest_j;
 737 }
 738
 739 /* Copy a file found in our --copy-dest handling. */
 740 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 741 {
 742         char buf[MAXPATHLEN];
 743         const char *copy_to, *partialptr;
 744         int save_preserve_xattrs = preserve_xattrs;
 745         int ok, fd_w;
 746
 747         if (inplace) {
 748                 /* Let copy_file open the destination in place. */
 749                 fd_w = -1;
 750                 copy_to = dest;
 751         } else {
 752                 fd_w = open_tmpfile(buf, dest, file);
 753                 if (fd_w < 0)
 754                         return -1;
 755                 copy_to = buf;
 756         }
 757         cleanup_set(copy_to, NULL, NULL, -1, -1);
 758         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 759                 if (INFO_GTE(COPY, 1)) {
 760                         rsyserr(FINFO, errno, "copy_file %s => %s",
 761                                 full_fname(src), copy_to);
 762                 }
 763                 /* Try to clean up. */
 764                 unlink(copy_to);
 765                 cleanup_disable();
 766                 return -1;
 767         }
 768         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 769         preserve_xattrs = 0; /* xattrs were copied with file */
 770         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 771         preserve_xattrs = save_preserve_xattrs;
 772         cleanup_disable();
 773         return ok ? 0 : -1;
 774 }
 775
 776 /* This is only called for regular files.  We return -2 if we've finished
 777  * handling the file, -1 if no dest-linking occurred, or a non-negative
 778  * value if we found an alternate basis file. */
 779 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 780                          char *cmpbuf, stat_x *sxp, int itemizing,
 781                          enum logcode code)
 782 {
 783         int best_match = -1;
 784         int match_level = 0;
 785         int j = 0;
 786
 787         do {
 788                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 789                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 790                         continue;
 791                 switch (match_level) {
 792                 case 0:
 793                         best_match = j;
 794                         match_level = 1;
 795                         /* FALL THROUGH */
 796                 case 1:
 797                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 798                                 continue;
 799                         best_match = j;
 800                         match_level = 2;
 801                         /* FALL THROUGH */
 802                 case 2:
 803                         if (!unchanged_attrs(cmpbuf, file, sxp))
 804                                 continue;
 805                         best_match = j;
 806                         match_level = 3;
 807                         break;
 808                 }
 809                 break;
 810         } while (basis_dir[++j] != NULL);
 811
 812         if (!match_level)
 813                 return -1;
 814
 815         if (j != best_match) {
 816                 j = best_match;
 817                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 818                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 819                         return -1;
 820         }
 821
 822         if (match_level == 3 && !copy_dest) {
 823 #ifdef SUPPORT_HARD_LINKS
 824                 if (link_dest) {
 825                         if (!hard_link_one(file, fname, cmpbuf, 1))
 826                                 goto try_a_copy;
 827                         if (preserve_hard_links && F_IS_HLINKED(file))
 828                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 829                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
 830                                 itemize(cmpbuf, file, ndx, 1, sxp,
 831                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 832                                         0, "");
 833                         }
 834                 } else
 835 #endif
 836                 if (itemizing)
 837                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
 838                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
 839                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 840                 return -2;
 841         }
 842
 843         if (match_level >= 2) {
 844 #ifdef SUPPORT_HARD_LINKS
 845           try_a_copy: /* Copy the file locally. */
 846 #endif
 847                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
 848                         return -1;
 849                 if (itemizing)
 850                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
 851                 if (maybe_ATTRS_REPORT
 852                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
 853                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
 854                         code = match_level == 3 ? FCLIENT : FINFO;
 855                         rprintf(code, "%s%s\n", fname,
 856                                 match_level == 3 ? " is uptodate" : "");
 857                 }
 858 #ifdef SUPPORT_HARD_LINKS
 859                 if (preserve_hard_links && F_IS_HLINKED(file))
 860                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
 861 #endif
 862                 return -2;
 863         }
 864
 865         return FNAMECMP_BASIS_DIR_LOW + j;
 866 }
 867
 868 /* This is only called for non-regular files.  We return -2 if we've finished
 869  * handling the file, or -1 if no dest-linking occurred, or a non-negative
 870  * value if we found an alternate basis file. */
 871 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 872                          char *cmpbuf, stat_x *sxp, int itemizing,
 873                          enum logcode code)
 874 {
 875         char lnk[MAXPATHLEN];
 876         int best_match = -1;
 877         int match_level = 0;
 878         enum nonregtype type;
 879         uint32 *devp;
 880         int len, j = 0;
 881
 882 #ifndef SUPPORT_LINKS
 883         if (S_ISLNK(file->mode))
 884                 return -1;
 885 #endif
 886         if (S_ISDIR(file->mode)) {
 887                 type = TYPE_DIR;
 888         } else if (IS_SPECIAL(file->mode))
 889                 type = TYPE_SPECIAL;
 890         else if (IS_DEVICE(file->mode))
 891                 type = TYPE_DEVICE;
 892 #ifdef SUPPORT_LINKS
 893         else if (S_ISLNK(file->mode))
 894                 type = TYPE_SYMLINK;
 895 #endif
 896         else {
 897                 rprintf(FERROR,
 898                         "internal: try_dests_non() called with invalid mode (%o)\n",
 899                         (int)file->mode);
 900                 exit_cleanup(RERR_UNSUPPORTED);
 901         }
 902
 903         do {
 904                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 905                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 906                         continue;
 907                 switch (type) {
 908                 case TYPE_DIR:
 909                         if (!S_ISDIR(sxp->st.st_mode))
 910                                 continue;
 911                         break;
 912                 case TYPE_SPECIAL:
 913                         if (!IS_SPECIAL(sxp->st.st_mode))
 914                                 continue;
 915                         break;
 916                 case TYPE_DEVICE:
 917                         if (!IS_DEVICE(sxp->st.st_mode))
 918                                 continue;
 919                         break;
 920 #ifdef SUPPORT_LINKS
 921                 case TYPE_SYMLINK:
 922                         if (!S_ISLNK(sxp->st.st_mode))
 923                                 continue;
 924                         break;
 925 #endif
 926                 }
 927                 if (match_level < 1) {
 928                         match_level = 1;
 929                         best_match = j;
 930                 }
 931                 switch (type) {
 932                 case TYPE_DIR:
 933                         break;
 934                 case TYPE_SPECIAL:
 935                 case TYPE_DEVICE:
 936                         devp = F_RDEV_P(file);
 937                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
 938                                 continue;
 939                         break;
 940 #ifdef SUPPORT_LINKS
 941                 case TYPE_SYMLINK:
 942                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
 943                                 continue;
 944                         lnk[len] = '\0';
 945                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
 946                                 continue;
 947                         break;
 948 #endif
 949                 }
 950                 if (match_level < 2) {
 951                         match_level = 2;
 952                         best_match = j;
 953                 }
 954                 if (unchanged_attrs(cmpbuf, file, sxp)) {
 955                         match_level = 3;
 956                         best_match = j;
 957                         break;
 958                 }
 959         } while (basis_dir[++j] != NULL);
 960
 961         if (!match_level)
 962                 return -1;
 963
 964         if (j != best_match) {
 965                 j = best_match;
 966                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 967                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 968                         return -1;
 969         }
 970
 971         if (match_level == 3) {
 972 #ifdef SUPPORT_HARD_LINKS
 973                 if (link_dest
 974 #ifndef CAN_HARDLINK_SYMLINK
 975                  && !S_ISLNK(file->mode)
 976 #endif
 977 #ifndef CAN_HARDLINK_SPECIAL
 978                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
 979 #endif
 980                  && !S_ISDIR(file->mode)) {
 981                         if (do_link(cmpbuf, fname) < 0) {
 982                                 rsyserr(FERROR_XFER, errno,
 983                                         "failed to hard-link %s with %s",
 984                                         cmpbuf, fname);
 985                                 return j;
 986                         }
 987                         if (preserve_hard_links && F_IS_HLINKED(file))
 988                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
 989                 } else
 990 #endif
 991                         match_level = 2;
 992                 if (itemizing && stdout_format_has_i
 993                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
 994                         int chg = compare_dest && type != TYPE_DIR ? 0
 995                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
 996                         char *lp = match_level == 3 ? "" : NULL;
 997                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
 998                 }
 999                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1000                         rprintf(FCLIENT, "%s%s is uptodate\n",
1001                                 fname, type == TYPE_DIR ? "/" : "");
1002                 }
1003                 return -2;
1004         }
1005
1006         return j;
1007 }
1008
1009 static void list_file_entry(struct file_struct *f)
1010 {
1011         char permbuf[PERMSTRING_SIZE];
1012         int64 len;
1013         int colwidth = human_readable ? 14 : 11;
1014
1015         if (!F_IS_ACTIVE(f)) {
1016                 /* this can happen if duplicate names were removed */
1017                 return;
1018         }
1019
1020         permstring(permbuf, f->mode);
1021         len = F_LENGTH(f);
1022
1023         /* TODO: indicate '+' if the entry has an ACL. */
1024
1025 #ifdef SUPPORT_LINKS
1026         if (preserve_links && S_ISLNK(f->mode)) {
1027                 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1028                         permbuf, colwidth, comma_num(len),
1029                         timestring(f->modtime), f_name(f, NULL),
1030                         F_SYMLINK(f));
1031         } else
1032 #endif
1033         {
1034                 rprintf(FINFO, "%s %*s %s %s\n",
1035                         permbuf, colwidth, comma_num(len),
1036                         timestring(f->modtime), f_name(f, NULL));
1037         }
1038 }
1039
1040 static int phase = 0;
1041 static int dflt_perms;
1042
1043 static int implied_dirs_are_missing;
1044 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1045 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1046 {
1047         return F_DEPTH(file) > F_DEPTH(subtree)
1048                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1049 }
1050
1051 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1052  * make sure it exists, and has the right permissions/timestamp info.  For
1053  * all other non-regular files (symlinks, etc.) we create them here.  For
1054  * regular files that have changed, we try to find a basis file and then
1055  * start sending checksums.  The ndx is the file's unique index value.
1056  *
1057  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1058  * passed to delete_item(), which can use it during a recursive delete.)
1059  *
1060  * Note that f_out is set to -1 when doing final directory-permission and
1061  * modification-time repair. */
1062 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1063                            int itemizing, enum logcode code, int f_out)
1064 {
1065         static const char *parent_dirname = "";
1066         /* Missing dir not created due to --dry-run; will still be scanned. */
1067         static struct file_struct *dry_missing_dir = NULL;
1068         /* Missing dir whose contents are skipped altogether due to
1069          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1070         static struct file_struct *skip_dir = NULL;
1071         static struct file_list *fuzzy_dirlist = NULL;
1072         static int need_fuzzy_dirlist = 0;
1073         struct file_struct *fuzzy_file = NULL;
1074         int fd = -1, f_copy = -1;
1075         stat_x sx, real_sx;
1076         STRUCT_STAT partial_st;
1077         struct file_struct *back_file = NULL;
1078         int statret, real_ret, stat_errno;
1079         char *fnamecmp, *partialptr, *backupptr = NULL;
1080         char fnamecmpbuf[MAXPATHLEN];
1081         uchar fnamecmp_type;
1082         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1083         int is_dir = !S_ISDIR(file->mode) ? 0
1084                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1085                    : 1;
1086
1087         if (DEBUG_GTE(GENR, 1))
1088                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1089
1090         if (list_only) {
1091                 if (is_dir < 0
1092                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1093                         return;
1094                 list_file_entry(file);
1095                 return;
1096         }
1097
1098         if (skip_dir) {
1099                 if (is_below(file, skip_dir)) {
1100                         if (is_dir)
1101                                 file->flags |= FLAG_MISSING_DIR;
1102 #ifdef SUPPORT_HARD_LINKS
1103                         else if (F_IS_HLINKED(file))
1104                                 handle_skipped_hlink(file, itemizing, code, f_out);
1105 #endif
1106                         return;
1107                 }
1108                 skip_dir = NULL;
1109         }
1110
1111         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1112                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1113                         if (is_dir < 0)
1114                                 return;
1115 #ifdef SUPPORT_HARD_LINKS
1116                         if (F_IS_HLINKED(file))
1117                                 handle_skipped_hlink(file, itemizing, code, f_out);
1118 #endif
1119                         rprintf(FERROR_XFER,
1120                                 "skipping daemon-excluded %s \"%s\"\n",
1121                                 is_dir ? "directory" : "file", fname);
1122                         if (is_dir)
1123                                 goto skipping_dir_contents;
1124                         return;
1125                 }
1126         }
1127
1128         init_stat_x(&sx);
1129         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1130           parent_is_dry_missing:
1131                 if (fuzzy_dirlist) {
1132                         flist_free(fuzzy_dirlist);
1133                         fuzzy_dirlist = NULL;
1134                 }
1135                 parent_dirname = "";
1136                 statret = -1;
1137                 stat_errno = ENOENT;
1138         } else {
1139                 const char *dn = file->dirname ? file->dirname : ".";
1140                 dry_missing_dir = NULL;
1141                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1142                         if (relative_paths && !implied_dirs
1143                          && do_stat(dn, &sx.st) < 0) {
1144                                 if (dry_run)
1145                                         goto parent_is_dry_missing;
1146                                 if (create_directory_path(fname) < 0) {
1147                                         rsyserr(FERROR_XFER, errno,
1148                                                 "recv_generator: mkdir %s failed",
1149                                                 full_fname(dn));
1150                                 }
1151                         }
1152                         if (fuzzy_dirlist) {
1153                                 flist_free(fuzzy_dirlist);
1154                                 fuzzy_dirlist = NULL;
1155                         }
1156                         if (fuzzy_basis)
1157                                 need_fuzzy_dirlist = 1;
1158 #ifdef SUPPORT_ACLS
1159                         if (!preserve_perms)
1160                                 dflt_perms = default_perms_for_dir(dn);
1161 #endif
1162                 }
1163                 parent_dirname = dn;
1164
1165                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1166                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1167                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1168                         need_fuzzy_dirlist = 0;
1169                 }
1170
1171                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1172                 stat_errno = errno;
1173         }
1174
1175         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1176                 if (is_dir) {
1177                         if (is_dir < 0)
1178                                 return;
1179                         skip_dir = file;
1180                         file->flags |= FLAG_MISSING_DIR;
1181                 }
1182 #ifdef SUPPORT_HARD_LINKS
1183                 else if (F_IS_HLINKED(file))
1184                         handle_skipped_hlink(file, itemizing, code, f_out);
1185 #endif
1186                 if (INFO_GTE(SKIP, 1)) {
1187                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1188                                 is_dir ? "directory" : "file", fname);
1189                 }
1190                 return;
1191         }
1192
1193         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1194          && !am_root && sx.st.st_uid == our_uid)
1195                 del_opts |= DEL_NO_UID_WRITE;
1196
1197         if (ignore_existing > 0 && statret == 0
1198          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1199                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1200                         rprintf(FINFO, "%s exists\n", fname);
1201 #ifdef SUPPORT_HARD_LINKS
1202                 if (F_IS_HLINKED(file))
1203                         handle_skipped_hlink(file, itemizing, code, f_out);
1204 #endif
1205                 goto cleanup;
1206         }
1207
1208         if (is_dir) {
1209                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1210                         goto cleanup;
1211                 if (is_dir < 0) {
1212                         /* In inc_recurse mode we want to make sure any missing
1213                          * directories get created while we're still processing
1214                          * the parent dir (which allows us to touch the parent
1215                          * dir's mtime right away).  We will handle the dir in
1216                          * full later (right before we handle its contents). */
1217                         if (statret == 0
1218                          && (S_ISDIR(sx.st.st_mode)
1219                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1220                                 goto cleanup; /* Any errors get reported later. */
1221                         if (do_mkdir(fname, file->mode & 0700) == 0)
1222                                 file->flags |= FLAG_DIR_CREATED;
1223                         goto cleanup;
1224                 }
1225                 /* The file to be received is a directory, so we need
1226                  * to prepare appropriately.  If there is already a
1227                  * file of that name and it is *not* a directory, then
1228                  * we need to delete it.  If it doesn't exist, then
1229                  * (perhaps recursively) create it. */
1230                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1231                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1232                                 goto skipping_dir_contents;
1233                         statret = -1;
1234                 }
1235                 if (dry_run && statret != 0) {
1236                         if (!dry_missing_dir)
1237                                 dry_missing_dir = file;
1238                         file->flags |= FLAG_MISSING_DIR;
1239                 }
1240                 real_ret = statret;
1241                 real_sx = sx;
1242                 if (file->flags & FLAG_DIR_CREATED)
1243                         statret = -1;
1244                 if (!preserve_perms) { /* See comment in non-dir code below. */
1245                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1246                                                dflt_perms, statret == 0);
1247                 }
1248                 if (statret != 0 && basis_dir[0] != NULL) {
1249                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1250                                               itemizing, code);
1251                         if (j == -2) {
1252                                 itemizing = 0;
1253                                 code = FNONE;
1254                                 statret = 1;
1255                         } else if (j >= 0)
1256                                 statret = 1;
1257                 }
1258                 if (itemizing && f_out != -1) {
1259                         itemize(fname, file, ndx, statret, &sx,
1260                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1261                 }
1262                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1263                         if (!relative_paths || errno != ENOENT
1264                             || create_directory_path(fname) < 0
1265                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1266                                 rsyserr(FERROR_XFER, errno,
1267                                         "recv_generator: mkdir %s failed",
1268                                         full_fname(fname));
1269                           skipping_dir_contents:
1270                                 rprintf(FERROR,
1271                                     "*** Skipping any contents from this failed directory ***\n");
1272                                 skip_dir = file;
1273                                 file->flags |= FLAG_MISSING_DIR;
1274                                 goto cleanup;
1275                         }
1276                 }
1277 #ifdef SUPPORT_XATTRS
1278                 if (preserve_xattrs && statret == 1)
1279                         copy_xattrs(fnamecmpbuf, fname);
1280 #endif
1281                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1282                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1283                         rprintf(code, "%s/\n", fname);
1284
1285                 /* We need to ensure that the dirs in the transfer have writable
1286                  * permissions during the time we are putting files within them.
1287                  * This is then fixed after the transfer is done. */
1288 #ifdef HAVE_CHMOD
1289                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1290                         mode_t mode = file->mode | S_IWUSR;
1291                         if (do_chmod(fname, mode) < 0) {
1292                                 rsyserr(FERROR_XFER, errno,
1293                                         "failed to modify permissions on %s",
1294                                         full_fname(fname));
1295                         }
1296                         need_retouch_dir_perms = 1;
1297                 }
1298 #endif
1299
1300                 if (real_ret != 0 && one_file_system)
1301                         real_sx.st.st_dev = filesystem_dev;
1302                 if (inc_recurse) {
1303                         if (one_file_system) {
1304                                 uint32 *devp = F_DIR_DEV_P(file);
1305                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1306                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1307                         }
1308                 }
1309                 else if (delete_during && f_out != -1 && !phase
1310                     && !(file->flags & FLAG_MISSING_DIR)) {
1311                         if (file->flags & FLAG_CONTENT_DIR)
1312                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1313                         else
1314                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1315                 }
1316                 goto cleanup;
1317         }
1318
1319         /* If we're not preserving permissions, change the file-list's
1320          * mode based on the local permissions and some heuristics. */
1321         if (!preserve_perms) {
1322                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1323                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1324                                        exists);
1325         }
1326
1327 #ifdef SUPPORT_HARD_LINKS
1328         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1329          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1330                 goto cleanup;
1331 #endif
1332
1333         if (preserve_links && S_ISLNK(file->mode)) {
1334 #ifdef SUPPORT_LINKS
1335                 const char *sl = F_SYMLINK(file);
1336                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1337                         if (INFO_GTE(NAME, 1)) {
1338                                 if (solo_file)
1339                                         fname = f_name(file, NULL);
1340                                 rprintf(FINFO,
1341                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1342                                         full_fname(fname), sl);
1343                         }
1344                         return;
1345                 }
1346                 if (statret == 0) {
1347                         char lnk[MAXPATHLEN];
1348                         int len;
1349
1350                         if (!S_ISLNK(sx.st.st_mode))
1351                                 statret = -1;
1352                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1353                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1354                                 /* The link is pointing to the right place. */
1355                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1356                                 if (itemizing)
1357                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1358 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1359                                 if (preserve_hard_links && F_IS_HLINKED(file))
1360                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1361 #endif
1362                                 if (remove_source_files == 1)
1363                                         goto return_with_success;
1364                                 goto cleanup;
1365                         }
1366                         /* Not the right symlink (or not a symlink), so
1367                          * delete it. */
1368                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1369                                 goto cleanup;
1370                 } else if (basis_dir[0] != NULL) {
1371                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1372                                               itemizing, code);
1373                         if (j == -2) {
1374 #ifndef CAN_HARDLINK_SYMLINK
1375                                 if (link_dest) {
1376                                         /* Resort to --copy-dest behavior. */
1377                                 } else
1378 #endif
1379                                 if (!copy_dest)
1380                                         goto cleanup;
1381                                 itemizing = 0;
1382                                 code = FNONE;
1383                         } else if (j >= 0)
1384                                 statret = 1;
1385                 }
1386 #ifdef SUPPORT_HARD_LINKS
1387                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1388                         cur_flist->in_progress++;
1389                         goto cleanup;
1390                 }
1391 #endif
1392                 if (do_symlink(sl, fname) != 0) {
1393                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1394                                 full_fname(fname), sl);
1395                 } else {
1396                         set_file_attrs(fname, file, NULL, NULL, 0);
1397                         if (itemizing) {
1398                                 itemize(fname, file, ndx, statret, &sx,
1399                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1400                         }
1401                         if (code != FNONE && INFO_GTE(NAME, 1))
1402                                 rprintf(code, "%s -> %s\n", fname, sl);
1403 #ifdef SUPPORT_HARD_LINKS
1404                         if (preserve_hard_links && F_IS_HLINKED(file))
1405                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1406 #endif
1407                         /* This does not check remove_source_files == 1
1408                          * because this is one of the items that the old
1409                          * --remove-sent-files option would remove. */
1410                         if (remove_source_files)
1411                                 goto return_with_success;
1412                 }
1413 #endif
1414                 goto cleanup;
1415         }
1416
1417         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1418          || (preserve_specials && IS_SPECIAL(file->mode))) {
1419                 uint32 *devp = F_RDEV_P(file);
1420                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1421                 if (statret == 0) {
1422                         int del_for_flag;
1423                         if (IS_DEVICE(file->mode)) {
1424                                 if (!IS_DEVICE(sx.st.st_mode))
1425                                         statret = -1;
1426                                 del_for_flag = DEL_FOR_DEVICE;
1427                         } else {
1428                                 if (!IS_SPECIAL(sx.st.st_mode))
1429                                         statret = -1;
1430                                 del_for_flag = DEL_FOR_SPECIAL;
1431                         }
1432                         if (statret == 0
1433                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1434                          && sx.st.st_rdev == rdev) {
1435                                 /* The device or special file is identical. */
1436                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1437                                 if (itemizing)
1438                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1439 #ifdef SUPPORT_HARD_LINKS
1440                                 if (preserve_hard_links && F_IS_HLINKED(file))
1441                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1442 #endif
1443                                 if (remove_source_files == 1)
1444                                         goto return_with_success;
1445                                 goto cleanup;
1446                         }
1447                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1448                                 goto cleanup;
1449                 } else if (basis_dir[0] != NULL) {
1450                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1451                                               itemizing, code);
1452                         if (j == -2) {
1453 #ifndef CAN_HARDLINK_SPECIAL
1454                                 if (link_dest) {
1455                                         /* Resort to --copy-dest behavior. */
1456                                 } else
1457 #endif
1458                                 if (!copy_dest)
1459                                         goto cleanup;
1460                                 itemizing = 0;
1461                                 code = FNONE;
1462                         } else if (j >= 0)
1463                                 statret = 1;
1464                 }
1465 #ifdef SUPPORT_HARD_LINKS
1466                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1467                         cur_flist->in_progress++;
1468                         goto cleanup;
1469                 }
1470 #endif
1471                 if (DEBUG_GTE(GENR, 1)) {
1472                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1473                                 fname, (int)file->mode,
1474                                 (long)major(rdev), (long)minor(rdev));
1475                 }
1476                 if (do_mknod(fname, file->mode, rdev) < 0) {
1477                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1478                                 full_fname(fname));
1479                 } else {
1480                         set_file_attrs(fname, file, NULL, NULL, 0);
1481                         if (itemizing) {
1482                                 itemize(fname, file, ndx, statret, &sx,
1483                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1484                         }
1485                         if (code != FNONE && INFO_GTE(NAME, 1))
1486                                 rprintf(code, "%s\n", fname);
1487 #ifdef SUPPORT_HARD_LINKS
1488                         if (preserve_hard_links && F_IS_HLINKED(file))
1489                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1490 #endif
1491                         if (remove_source_files == 1)
1492                                 goto return_with_success;
1493                 }
1494                 goto cleanup;
1495         }
1496
1497         if (!S_ISREG(file->mode)) {
1498                 if (solo_file)
1499                         fname = f_name(file, NULL);
1500                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1501                 goto cleanup;
1502         }
1503
1504         if (max_size > 0 && F_LENGTH(file) > max_size) {
1505                 if (INFO_GTE(SKIP, 1)) {
1506                         if (solo_file)
1507                                 fname = f_name(file, NULL);
1508                         rprintf(FINFO, "%s is over max-size\n", fname);
1509                 }
1510                 goto cleanup;
1511         }
1512         if (min_size > 0 && F_LENGTH(file) < min_size) {
1513                 if (INFO_GTE(SKIP, 1)) {
1514                         if (solo_file)
1515                                 fname = f_name(file, NULL);
1516                         rprintf(FINFO, "%s is under min-size\n", fname);
1517                 }
1518                 goto cleanup;
1519         }
1520
1521         if (update_only > 0 && statret == 0
1522             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1523                 if (INFO_GTE(SKIP, 1))
1524                         rprintf(FINFO, "%s is newer\n", fname);
1525 #ifdef SUPPORT_HARD_LINKS
1526                 if (F_IS_HLINKED(file))
1527                         handle_skipped_hlink(file, itemizing, code, f_out);
1528 #endif
1529                 goto cleanup;
1530         }
1531
1532         fnamecmp = fname;
1533         fnamecmp_type = FNAMECMP_FNAME;
1534
1535         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1536                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1537                         goto cleanup;
1538                 statret = -1;
1539                 stat_errno = ENOENT;
1540         }
1541
1542         if (statret != 0 && basis_dir[0] != NULL) {
1543                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1544                                       itemizing, code);
1545                 if (j == -2) {
1546                         if (remove_source_files == 1)
1547                                 goto return_with_success;
1548                         goto cleanup;
1549                 }
1550                 if (j >= 0) {
1551                         fnamecmp = fnamecmpbuf;
1552                         fnamecmp_type = j;
1553                         statret = 0;
1554                 }
1555         }
1556
1557         real_ret = statret;
1558         real_sx = sx;
1559
1560         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1561             && link_stat(partialptr, &partial_st, 0) == 0
1562             && S_ISREG(partial_st.st_mode)) {
1563                 if (statret != 0)
1564                         goto prepare_to_open;
1565         } else
1566                 partialptr = NULL;
1567
1568         if (statret != 0 && fuzzy_dirlist) {
1569                 int j = find_fuzzy(file, fuzzy_dirlist);
1570                 if (j >= 0) {
1571                         fuzzy_file = fuzzy_dirlist->files[j];
1572                         f_name(fuzzy_file, fnamecmpbuf);
1573                         if (DEBUG_GTE(FUZZY, 1)) {
1574                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1575                                         fname, fnamecmpbuf);
1576                         }
1577                         sx.st.st_size = F_LENGTH(fuzzy_file);
1578                         statret = 0;
1579                         fnamecmp = fnamecmpbuf;
1580                         fnamecmp_type = FNAMECMP_FUZZY;
1581                 }
1582         }
1583
1584         if (statret != 0) {
1585 #ifdef SUPPORT_HARD_LINKS
1586                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1587                         cur_flist->in_progress++;
1588                         goto cleanup;
1589                 }
1590 #endif
1591                 if (stat_errno == ENOENT)
1592                         goto notify_others;
1593                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1594                         full_fname(fname));
1595                 goto cleanup;
1596         }
1597
1598         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1599                 ;
1600         else if (fnamecmp_type == FNAMECMP_FUZZY)
1601                 ;
1602         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1603                 if (partialptr) {
1604                         do_unlink(partialptr);
1605                         handle_partial_dir(partialptr, PDIR_DELETE);
1606                 }
1607                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1608                 if (itemizing)
1609                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1610 #ifdef SUPPORT_HARD_LINKS
1611                 if (preserve_hard_links && F_IS_HLINKED(file))
1612                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1613 #endif
1614                 if (remove_source_files != 1)
1615                         goto cleanup;
1616           return_with_success:
1617                 if (!dry_run)
1618                         send_msg_int(MSG_SUCCESS, ndx);
1619                 goto cleanup;
1620         }
1621
1622         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1623 #ifdef SUPPORT_HARD_LINKS
1624                 if (F_IS_HLINKED(file))
1625                         handle_skipped_hlink(file, itemizing, code, f_out);
1626 #endif
1627                 goto cleanup;
1628         }
1629
1630   prepare_to_open:
1631         if (partialptr) {
1632                 sx.st = partial_st;
1633                 fnamecmp = partialptr;
1634                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1635                 statret = 0;
1636         }
1637
1638         if (!do_xfers)
1639                 goto notify_others;
1640
1641         if (read_batch || whole_file) {
1642                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1643                         if (!(backupptr = get_backup_name(fname)))
1644                                 goto cleanup;
1645                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1646                                 goto pretend_missing;
1647                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1648                                 unmake_file(back_file);
1649                                 back_file = NULL;
1650                                 goto cleanup;
1651                         }
1652                 }
1653                 goto notify_others;
1654         }
1655
1656         if (fuzzy_dirlist) {
1657                 int j = flist_find(fuzzy_dirlist, file);
1658                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1659                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1660         }
1661
1662         /* open the file */
1663         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1664                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1665                         full_fname(fnamecmp));
1666           pretend_missing:
1667                 /* pretend the file didn't exist */
1668 #ifdef SUPPORT_HARD_LINKS
1669                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1670                         cur_flist->in_progress++;
1671                         goto cleanup;
1672                 }
1673 #endif
1674                 statret = real_ret = -1;
1675                 goto notify_others;
1676         }
1677
1678         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1679                 if (!(backupptr = get_backup_name(fname))) {
1680                         close(fd);
1681                         goto cleanup;
1682                 }
1683                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1684                         close(fd);
1685                         goto pretend_missing;
1686                 }
1687                 if (robust_unlink(backupptr) && errno != ENOENT) {
1688                         rsyserr(FERROR_XFER, errno, "unlink %s",
1689                                 full_fname(backupptr));
1690                         unmake_file(back_file);
1691                         back_file = NULL;
1692                         close(fd);
1693                         goto cleanup;
1694                 }
1695                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1696                         int save_errno = errno ? errno : EINVAL; /* 0 paranoia */
1697                         if (errno == ENOENT && make_bak_dir(backupptr) == 0) {
1698                                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)
1699                                         save_errno = errno ? errno : save_errno;
1700                                 else
1701                                         save_errno = 0;
1702                         }
1703                         if (save_errno) {
1704                                 rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(backupptr));
1705                                 unmake_file(back_file);
1706                                 back_file = NULL;
1707                                 close(fd);
1708                                 goto cleanup;
1709                         }
1710                 }
1711                 fnamecmp_type = FNAMECMP_BACKUP;
1712         }
1713
1714         if (DEBUG_GTE(DELTASUM, 3)) {
1715                 rprintf(FINFO, "gen mapped %s of size %s\n",
1716                         fnamecmp, big_num(sx.st.st_size));
1717         }
1718
1719         if (DEBUG_GTE(DELTASUM, 2))
1720                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1721
1722   notify_others:
1723         if (remove_source_files && !delay_updates && !phase && !dry_run)
1724                 increment_active_files(ndx, itemizing, code);
1725         if (inc_recurse && !dry_run)
1726                 cur_flist->in_progress++;
1727 #ifdef SUPPORT_HARD_LINKS
1728         if (preserve_hard_links && F_IS_HLINKED(file))
1729                 file->flags |= FLAG_FILE_SENT;
1730 #endif
1731         write_ndx(f_out, ndx);
1732         if (itemizing) {
1733                 int iflags = ITEM_TRANSFER;
1734                 if (always_checksum > 0)
1735                         iflags |= ITEM_REPORT_CHANGE;
1736                 if (fnamecmp_type != FNAMECMP_FNAME)
1737                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1738                 if (fnamecmp_type == FNAMECMP_FUZZY)
1739                         iflags |= ITEM_XNAME_FOLLOWS;
1740                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1741                         fuzzy_file ? fuzzy_file->basename : NULL);
1742 #ifdef SUPPORT_ACLS
1743                 if (preserve_acls)
1744                         free_acl(&real_sx);
1745 #endif
1746 #ifdef SUPPORT_XATTRS
1747                 if (preserve_xattrs)
1748                         free_xattr(&real_sx);
1749 #endif
1750         }
1751
1752         if (!do_xfers) {
1753 #ifdef SUPPORT_HARD_LINKS
1754                 if (preserve_hard_links && F_IS_HLINKED(file))
1755                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1756 #endif
1757                 goto cleanup;
1758         }
1759         if (read_batch)
1760                 goto cleanup;
1761
1762         if (statret != 0 || whole_file)
1763                 write_sum_head(f_out, NULL);
1764         else if (sx.st.st_size <= 0) {
1765                 write_sum_head(f_out, NULL);
1766                 close(fd);
1767         } else {
1768                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1769                         rprintf(FWARNING,
1770                             "WARNING: file is too large for checksum sending: %s\n",
1771                             fnamecmp);
1772                         write_sum_head(f_out, NULL);
1773                 }
1774                 close(fd);
1775         }
1776
1777   cleanup:
1778         if (back_file) {
1779                 int save_preserve_xattrs = preserve_xattrs;
1780                 if (f_copy >= 0)
1781                         close(f_copy);
1782 #ifdef SUPPORT_XATTRS
1783                 if (preserve_xattrs) {
1784                         copy_xattrs(fname, backupptr);
1785                         preserve_xattrs = 0;
1786                 }
1787 #endif
1788                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1789                 preserve_xattrs = save_preserve_xattrs;
1790                 if (INFO_GTE(BACKUP, 1)) {
1791                         rprintf(FINFO, "backed up %s to %s\n",
1792                                 fname, backupptr);
1793                 }
1794                 unmake_file(back_file);
1795         }
1796
1797 #ifdef SUPPORT_ACLS
1798         if (preserve_acls)
1799                 free_acl(&sx);
1800 #endif
1801 #ifdef SUPPORT_XATTRS
1802         if (preserve_xattrs)
1803                 free_xattr(&sx);
1804 #endif
1805         return;
1806 }
1807
1808 #ifdef SUPPORT_HARD_LINKS
1809 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1810                                  enum logcode code, int f_out)
1811 {
1812         char fbuf[MAXPATHLEN];
1813         int new_last_ndx;
1814         struct file_list *save_flist = cur_flist;
1815
1816         /* If we skip the last item in a chain of links and there was a
1817          * prior non-skipped hard-link waiting to finish, finish it now. */
1818         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1819                 return;
1820
1821         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1822         cur_flist->in_progress--; /* undo prior increment */
1823         f_name(file, fbuf);
1824         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1825
1826         cur_flist = save_flist;
1827 }
1828 #endif
1829
1830 static void touch_up_dirs(struct file_list *flist, int ndx)
1831 {
1832         static int counter = 0;
1833         struct file_struct *file;
1834         char *fname;
1835         int i, start, end;
1836
1837         if (ndx < 0) {
1838                 start = 0;
1839                 end = flist->used - 1;
1840         } else
1841                 start = end = ndx;
1842
1843         /* Fix any directory permissions that were modified during the
1844          * transfer and/or re-set any tweaked modified-time values. */
1845         for (i = start; i <= end; i++, counter++) {
1846                 file = flist->files[i];
1847                 if (!S_ISDIR(file->mode)
1848                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1849                         continue;
1850                 if (DEBUG_GTE(TIME, 2)) {
1851                         fname = f_name(file, NULL);
1852                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
1853                                 NS(fname), i);
1854                 }
1855                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
1856                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
1857                         continue;
1858                 fname = f_name(file, NULL);
1859                 if (!(file->mode & S_IWUSR))
1860                         do_chmod(fname, file->mode);
1861                 if (need_retouch_dir_times) {
1862                         STRUCT_STAT st;
1863                         if (link_stat(fname, &st, 0) == 0
1864                          && cmp_time(st.st_mtime, file->modtime) != 0)
1865                                 set_modtime(fname, file->modtime, file->mode);
1866                 }
1867                 if (counter >= loopchk_limit) {
1868                         if (allowed_lull)
1869                                 maybe_send_keepalive();
1870                         else
1871                                 maybe_flush_socket(0);
1872                         counter = 0;
1873                 }
1874         }
1875 }
1876
1877 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
1878 {
1879         struct file_struct *file;
1880         struct file_list *flist;
1881         char fbuf[MAXPATHLEN];
1882         int ndx;
1883
1884         while (1) {
1885 #ifdef SUPPORT_HARD_LINKS
1886                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
1887                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
1888                         file = flist->files[ndx - flist->ndx_start];
1889                         assert(file->flags & FLAG_HLINKED);
1890                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
1891                         flist->in_progress--;
1892                         continue;
1893                 }
1894 #endif
1895
1896                 if (check_redo && (ndx = get_redo_num()) != -1) {
1897                         csum_length = SUM_LENGTH;
1898                         max_size = -max_size;
1899                         min_size = -min_size;
1900                         ignore_existing = -ignore_existing;
1901                         ignore_non_existing = -ignore_non_existing;
1902                         update_only = -update_only;
1903                         always_checksum = -always_checksum;
1904                         size_only = -size_only;
1905                         append_mode = -append_mode;
1906                         make_backups = -make_backups; /* avoid dup backup w/inplace */
1907                         ignore_times++;
1908
1909                         flist = cur_flist;
1910                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
1911
1912                         file = cur_flist->files[ndx - cur_flist->ndx_start];
1913                         if (solo_file)
1914                                 strlcpy(fbuf, solo_file, sizeof fbuf);
1915                         else
1916                                 f_name(file, fbuf);
1917                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
1918                         cur_flist->to_redo--;
1919
1920                         cur_flist = flist;
1921
1922                         csum_length = SHORT_SUM_LENGTH;
1923                         max_size = -max_size;
1924                         min_size = -min_size;
1925                         ignore_existing = -ignore_existing;
1926                         ignore_non_existing = -ignore_non_existing;
1927                         update_only = -update_only;
1928                         always_checksum = -always_checksum;
1929                         size_only = -size_only;
1930                         append_mode = -append_mode;
1931                         make_backups = -make_backups;
1932                         ignore_times--;
1933                         continue;
1934                 }
1935
1936                 if (cur_flist == first_flist)
1937                         break;
1938
1939                 /* We only get here if inc_recurse is enabled. */
1940                 if (first_flist->in_progress || first_flist->to_redo)
1941                         break;
1942
1943                 write_ndx(sock_f_out, NDX_DONE);
1944                 if (!read_batch)
1945                         maybe_flush_socket(1);
1946
1947                 if (delete_during == 2 || !dir_tweaking) {
1948                         /* Skip directory touch-up. */
1949                 } else if (first_flist->parent_ndx >= 0)
1950                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
1951
1952                 flist_free(first_flist); /* updates first_flist */
1953         }
1954 }
1955
1956 void generate_files(int f_out, const char *local_name)
1957 {
1958         int i, ndx, next_loopchk = 0;
1959         char fbuf[MAXPATHLEN];
1960         int itemizing;
1961         enum logcode code;
1962         int save_info_flist = info_levels[INFO_FLIST];
1963         int save_info_progress = info_levels[INFO_PROGRESS];
1964
1965         if (protocol_version >= 29) {
1966                 itemizing = 1;
1967                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1968                 code = logfile_format_has_i ? FNONE : FLOG;
1969         } else if (am_daemon) {
1970                 itemizing = logfile_format_has_i && do_xfers;
1971                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1972                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
1973         } else if (!am_server) {
1974                 itemizing = stdout_format_has_i;
1975                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
1976                 code = itemizing ? FNONE : FINFO;
1977         } else {
1978                 itemizing = 0;
1979                 maybe_ATTRS_REPORT = ATTRS_REPORT;
1980                 code = FINFO;
1981         }
1982         solo_file = local_name;
1983         dir_tweaking = !(list_only || solo_file || dry_run);
1984         need_retouch_dir_times = preserve_times > 1;
1985         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
1986         symlink_timeset_failed_flags = ITEM_REPORT_TIME
1987             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
1988         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
1989
1990         if (DEBUG_GTE(GENR, 1))
1991                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
1992
1993         if (delete_before && !solo_file && cur_flist->used > 0)
1994                 do_delete_pass();
1995         if (delete_during == 2) {
1996                 deldelay_size = BIGPATHBUFLEN * 4;
1997                 deldelay_buf = new_array(char, deldelay_size);
1998                 if (!deldelay_buf)
1999                         out_of_memory("delete-delay");
2000         }
2001         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2002
2003         if (append_mode > 0 || whole_file < 0)
2004                 whole_file = 0;
2005         if (DEBUG_GTE(FLIST, 1)) {
2006                 rprintf(FINFO, "delta-transmission %s\n",
2007                         whole_file
2008                         ? "disabled for local transfer or --whole-file"
2009                         : "enabled");
2010         }
2011
2012         /* Since we often fill up the outgoing socket and then just sit around
2013          * waiting for the other 2 processes to do their thing, we don't want
2014          * to exit on a timeout.  If the data stops flowing, the receiver will
2015          * notice that and let us know via the redo pipe (or its closing). */
2016         ignore_timeout = 1;
2017
2018         dflt_perms = (ACCESSPERMS & ~orig_umask);
2019
2020         do {
2021 #ifdef SUPPORT_HARD_LINKS
2022                 if (preserve_hard_links && inc_recurse) {
2023                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2024                                 wait_for_receiver();
2025                 }
2026 #endif
2027
2028                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2029                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2030                         if (solo_file)
2031                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2032                         else
2033                                 f_name(fp, fbuf);
2034                         ndx = cur_flist->ndx_start - 1;
2035                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2036                         if (delete_during && dry_run < 2 && !list_only
2037                          && !(fp->flags & FLAG_MISSING_DIR)) {
2038                                 if (fp->flags & FLAG_CONTENT_DIR) {
2039                                         dev_t dirdev;
2040                                         if (one_file_system) {
2041                                                 uint32 *devp = F_DIR_DEV_P(fp);
2042                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2043                                         } else
2044                                                 dirdev = MAKEDEV(0, 0);
2045                                         delete_in_dir(fbuf, fp, &dirdev);
2046                                 } else
2047                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2048                         }
2049                 }
2050                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2051                         struct file_struct *file = cur_flist->sorted[i];
2052
2053                         if (!F_IS_ACTIVE(file))
2054                                 continue;
2055
2056                         if (unsort_ndx)
2057                                 ndx = F_NDX(file);
2058                         else
2059                                 ndx = i + cur_flist->ndx_start;
2060
2061                         if (solo_file)
2062                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2063                         else
2064                                 f_name(file, fbuf);
2065                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2066
2067                         check_for_finished_files(itemizing, code, 0);
2068
2069                         if (i + cur_flist->ndx_start >= next_loopchk) {
2070                                 if (allowed_lull)
2071                                         maybe_send_keepalive();
2072                                 else
2073                                         maybe_flush_socket(0);
2074                                 next_loopchk += loopchk_limit;
2075                         }
2076                 }
2077
2078                 if (!inc_recurse) {
2079                         write_ndx(f_out, NDX_DONE);
2080                         break;
2081                 }
2082
2083                 while (1) {
2084                         check_for_finished_files(itemizing, code, 1);
2085                         if (cur_flist->next || flist_eof)
2086                                 break;
2087                         wait_for_receiver();
2088                 }
2089         } while ((cur_flist = cur_flist->next) != NULL);
2090
2091         if (delete_during)
2092                 delete_in_dir(NULL, NULL, &dev_zero);
2093         phase++;
2094         if (DEBUG_GTE(GENR, 1))
2095                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2096
2097         while (1) {
2098                 check_for_finished_files(itemizing, code, 1);
2099                 if (msgdone_cnt)
2100                         break;
2101                 wait_for_receiver();
2102         }
2103
2104         phase++;
2105         if (DEBUG_GTE(GENR, 1))
2106                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2107
2108         write_ndx(f_out, NDX_DONE);
2109
2110         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2111         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2112                 write_ndx(f_out, NDX_DONE);
2113
2114         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2115                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2116                         write_del_stats(f_out);
2117                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2118                         write_ndx(f_out, NDX_DONE);
2119         }
2120
2121         /* Read MSG_DONE for the redo phase (and any prior messages). */
2122         while (1) {
2123                 check_for_finished_files(itemizing, code, 0);
2124                 if (msgdone_cnt > 1)
2125                         break;
2126                 wait_for_receiver();
2127         }
2128
2129         if (protocol_version >= 29) {
2130                 phase++;
2131                 if (DEBUG_GTE(GENR, 1))
2132                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2133                 if (!EARLY_DELAY_DONE_MSG()) {
2134                         write_ndx(f_out, NDX_DONE);
2135                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2136                                 write_ndx(f_out, NDX_DONE);
2137                 }
2138                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2139                 while (msgdone_cnt == 2)
2140                         wait_for_receiver();
2141         }
2142
2143         info_levels[INFO_FLIST] = save_info_flist;
2144         info_levels[INFO_PROGRESS] = save_info_progress;
2145
2146         if (delete_during == 2)
2147                 do_delayed_deletions(fbuf);
2148         if (delete_after && !solo_file && file_total > 0)
2149                 do_delete_pass();
2150
2151         if (max_delete >= 0 && skipped_deletes) {
2152                 rprintf(FWARNING,
2153                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2154                         skipped_deletes);
2155                 io_error |= IOERR_DEL_LIMIT;
2156         }
2157
2158         if (protocol_version >= 31) {
2159                 if (!EARLY_DELETE_DONE_MSG()) {
2160                         if (INFO_GTE(STATS, 2) || read_batch)
2161                                 write_del_stats(f_out);
2162                         write_ndx(f_out, NDX_DONE);
2163                 }
2164
2165                 /* Read MSG_DONE for late-delete phase & prior messages. */
2166                 while (msgdone_cnt == 3)
2167                         wait_for_receiver();
2168         }
2169
2170         if ((need_retouch_dir_perms || need_retouch_dir_times)
2171          && dir_tweaking && (!inc_recurse || delete_during == 2))
2172                 touch_up_dirs(dir_flist, -1);
2173
2174         if (DEBUG_GTE(GENR, 1))
2175                 rprintf(FINFO, "generate_files finished\n");
2176 }