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