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