generator.c

   1 /*
   2  * Routines that are exclusive to the generator process.
   3  *
   4  * Copyright (C) 1996-2000 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2003-2009 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "inums.h"
  25 #include "ifuncs.h"
  26
  27 extern int dry_run;
  28 extern int do_xfers;
  29 extern int stdout_format_has_i;
  30 extern int logfile_format_has_i;
  31 extern int am_root;
  32 extern int am_server;
  33 extern int am_daemon;
  34 extern int inc_recurse;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_acls;
  39 extern int preserve_xattrs;
  40 extern int preserve_links;
  41 extern int preserve_devices;
  42 extern int preserve_specials;
  43 extern int preserve_hard_links;
  44 extern int preserve_executability;
  45 extern int preserve_perms;
  46 extern int preserve_times;
  47 extern int uid_ndx;
  48 extern int gid_ndx;
  49 extern int delete_mode;
  50 extern int delete_before;
  51 extern int delete_during;
  52 extern int delete_after;
  53 extern int missing_args;
  54 extern int msgdone_cnt;
  55 extern int ignore_errors;
  56 extern int remove_source_files;
  57 extern int delay_updates;
  58 extern int update_only;
  59 extern int human_readable;
  60 extern int ignore_existing;
  61 extern int ignore_non_existing;
  62 extern int inplace;
  63 extern int append_mode;
  64 extern int make_backups;
  65 extern int csum_length;
  66 extern int ignore_times;
  67 extern int size_only;
  68 extern OFF_T max_size;
  69 extern OFF_T min_size;
  70 extern int io_error;
  71 extern int flist_eof;
  72 extern int allowed_lull;
  73 extern int sock_f_out;
  74 extern int ignore_timeout;
  75 extern int protocol_version;
  76 extern int file_total;
  77 extern int fuzzy_basis;
  78 extern int always_checksum;
  79 extern int checksum_len;
  80 extern char *partial_dir;
  81 extern int compare_dest;
  82 extern int copy_dest;
  83 extern int link_dest;
  84 extern int whole_file;
  85 extern int list_only;
  86 extern int read_batch;
  87 extern int safe_symlinks;
  88 extern long block_size; /* "long" because popt can't set an int32. */
  89 extern int unsort_ndx;
  90 extern int max_delete;
  91 extern int force_delete;
  92 extern int one_file_system;
  93 extern int skipped_deletes;
  94 extern struct stats stats;
  95 extern dev_t filesystem_dev;
  96 extern mode_t orig_umask;
  97 extern uid_t our_uid;
  98 extern char *tmpdir;
  99 extern char *basis_dir[MAX_BASIS_DIRS+1];
 100 extern struct file_list *cur_flist, *first_flist, *dir_flist;
 101 extern filter_rule_list filter_list, daemon_filter_list;
 102
 103 int maybe_ATTRS_REPORT = 0;
 104
 105 static dev_t dev_zero;
 106 static int deldelay_size = 0, deldelay_cnt = 0;
 107 static char *deldelay_buf = NULL;
 108 static int deldelay_fd = -1;
 109 static int loopchk_limit;
 110 static int dir_tweaking;
 111 static int symlink_timeset_failed_flags;
 112 static int need_retouch_dir_times;
 113 static int need_retouch_dir_perms;
 114 static const char *solo_file = NULL;
 115
 116 enum nonregtype {
 117     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 118 };
 119
 120 /* Forward declarations. */
 121 #ifdef SUPPORT_HARD_LINKS
 122 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 123                                  enum logcode code, int f_out);
 124 #endif
 125
 126 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
 127 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
 128
 129 static int start_delete_delay_temp(void)
 130 {
 131         char fnametmp[MAXPATHLEN];
 132         int save_dry_run = dry_run;
 133
 134         dry_run = 0;
 135         if (!get_tmpname(fnametmp, "deldelay", False)
 136          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 137                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 138                         inc_recurse ? "" : " -- switching to --delete-after");
 139                 delete_during = 0;
 140                 delete_after = !inc_recurse;
 141                 dry_run = save_dry_run;
 142                 return 0;
 143         }
 144         unlink(fnametmp);
 145         dry_run = save_dry_run;
 146         return 1;
 147 }
 148
 149 static int flush_delete_delay(void)
 150 {
 151         if (deldelay_fd < 0 && !start_delete_delay_temp())
 152                 return 0;
 153         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 154                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 155                 delete_during = 0;
 156                 delete_after = !inc_recurse;
 157                 close(deldelay_fd);
 158                 return 0;
 159         }
 160         deldelay_cnt = 0;
 161         return 1;
 162 }
 163
 164 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 165 {
 166         int len;
 167
 168         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 169                 return 0;
 170
 171         if (flags & DEL_NO_UID_WRITE)
 172                 deldelay_buf[deldelay_cnt++] = '!';
 173
 174         while (1) {
 175                 len = snprintf(deldelay_buf + deldelay_cnt,
 176                                deldelay_size - deldelay_cnt,
 177                                "%x %s%c",
 178                                (int)file->mode, fname, '\0');
 179                 if ((deldelay_cnt += len) <= deldelay_size)
 180                         break;
 181                 deldelay_cnt -= len;
 182                 if (!flush_delete_delay())
 183                         return 0;
 184         }
 185
 186         return 1;
 187 }
 188
 189 static int read_delay_line(char *buf, int *flags_p)
 190 {
 191         static int read_pos = 0;
 192         int j, len, mode;
 193         char *bp, *past_space;
 194
 195         while (1) {
 196                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 197                 if (j < deldelay_cnt)
 198                         break;
 199                 if (deldelay_fd < 0) {
 200                         if (j > read_pos)
 201                                 goto invalid_data;
 202                         return -1;
 203                 }
 204                 deldelay_cnt -= read_pos;
 205                 if (deldelay_cnt == deldelay_size)
 206                         goto invalid_data;
 207                 if (deldelay_cnt && read_pos) {
 208                         memmove(deldelay_buf, deldelay_buf + read_pos,
 209                                 deldelay_cnt);
 210                 }
 211                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 212                            deldelay_size - deldelay_cnt);
 213                 if (len == 0) {
 214                         if (deldelay_cnt) {
 215                                 rprintf(FERROR,
 216                                     "ERROR: unexpected EOF in delete-delay file.\n");
 217                         }
 218                         return -1;
 219                 }
 220                 if (len < 0) {
 221                         rsyserr(FERROR, errno,
 222                                 "reading delete-delay file");
 223                         return -1;
 224                 }
 225                 deldelay_cnt += len;
 226                 read_pos = 0;
 227         }
 228
 229         bp = deldelay_buf + read_pos;
 230         if (*bp == '!') {
 231                 bp++;
 232                 *flags_p = DEL_NO_UID_WRITE;
 233         } else
 234                 *flags_p = 0;
 235
 236         if (sscanf(bp, "%x ", &mode) != 1) {
 237           invalid_data:
 238                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 239                 return -1;
 240         }
 241         past_space = strchr(bp, ' ') + 1;
 242         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 243         read_pos = j + 1;
 244
 245         if (len > MAXPATHLEN) {
 246                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 247                 return -1;
 248         }
 249
 250         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 251          * instead of returning a pointer to our buffer. */
 252         memcpy(buf, past_space, len);
 253
 254         return mode;
 255 }
 256
 257 static void do_delayed_deletions(char *delbuf)
 258 {
 259         int mode, flags;
 260
 261         if (deldelay_fd >= 0) {
 262                 if (deldelay_cnt && !flush_delete_delay())
 263                         return;
 264                 lseek(deldelay_fd, 0, 0);
 265         }
 266         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 267                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 268         if (deldelay_fd >= 0)
 269                 close(deldelay_fd);
 270 }
 271
 272 /* This function is used to implement per-directory deletion, and is used by
 273  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 274  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 275  * call will append names onto the end, but the old dir value will be restored
 276  * on exit). */
 277 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 278 {
 279         static int already_warned = 0;
 280         struct file_list *dirlist;
 281         char delbuf[MAXPATHLEN];
 282         int dlen, i;
 283         int save_uid_ndx = uid_ndx;
 284
 285         if (!fbuf) {
 286                 change_local_filter_dir(NULL, 0, 0);
 287                 return;
 288         }
 289
 290         if (DEBUG_GTE(DEL, 2))
 291                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 292
 293         if (allowed_lull)
 294                 maybe_send_keepalive();
 295
 296         if (io_error && !ignore_errors) {
 297                 if (already_warned)
 298                         return;
 299                 rprintf(FINFO,
 300                         "IO error encountered -- skipping file deletion\n");
 301                 already_warned = 1;
 302                 return;
 303         }
 304
 305         dlen = strlen(fbuf);
 306         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 307
 308         if (one_file_system) {
 309                 if (file->flags & FLAG_TOP_DIR)
 310                         filesystem_dev = *fs_dev;
 311                 else if (filesystem_dev != *fs_dev)
 312                         return;
 313         }
 314
 315         if (!uid_ndx)
 316                 uid_ndx = ++file_extra_cnt;
 317
 318         dirlist = get_dirlist(fbuf, dlen, 0);
 319
 320         /* If an item in dirlist is not found in flist, delete it
 321          * from the filesystem. */
 322         for (i = dirlist->used; i--; ) {
 323                 struct file_struct *fp = dirlist->files[i];
 324                 if (!F_IS_ACTIVE(fp))
 325                         continue;
 326                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 327                         if (INFO_GTE(MOUNT, 1))
 328                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 329                                         f_name(fp, NULL));
 330                         continue;
 331                 }
 332                 /* Here we want to match regardless of file type.  Replacement
 333                  * of a file with one of another type is handled separately by
 334                  * a delete_item call with a DEL_MAKE_ROOM flag. */
 335                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
 336                         int flags = DEL_RECURSE;
 337                         if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 338                                 flags |= DEL_NO_UID_WRITE;
 339                         f_name(fp, delbuf);
 340                         if (delete_during == 2) {
 341                                 if (!remember_delete(fp, delbuf, flags))
 342                                         break;
 343                         } else
 344                                 delete_item(delbuf, fp->mode, flags);
 345                 }
 346         }
 347
 348         flist_free(dirlist);
 349
 350         if (!save_uid_ndx) {
 351                 --file_extra_cnt;
 352                 uid_ndx = 0;
 353         }
 354 }
 355
 356 /* This deletes any files on the receiving side that are not present on the
 357  * sending side.  This is used by --delete-before and --delete-after. */
 358 static void do_delete_pass(void)
 359 {
 360         char fbuf[MAXPATHLEN];
 361         STRUCT_STAT st;
 362         int j;
 363
 364         /* dry_run is incremented when the destination doesn't exist yet. */
 365         if (dry_run > 1 || list_only)
 366                 return;
 367
 368         for (j = 0; j < cur_flist->used; j++) {
 369                 struct file_struct *file = cur_flist->sorted[j];
 370
 371                 f_name(file, fbuf);
 372
 373                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 374                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 375                         continue;
 376                 }
 377
 378                 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
 379                         rprintf(FINFO, "deleting in %s\n", fbuf);
 380
 381                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 382                  || !S_ISDIR(st.st_mode))
 383                         continue;
 384
 385                 delete_in_dir(fbuf, file, &st.st_dev);
 386         }
 387         delete_in_dir(NULL, NULL, &dev_zero);
 388
 389         if (INFO_GTE(FLIST, 2) && !am_server)
 390                 rprintf(FINFO, "                    \r");
 391 }
 392
 393 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 394 {
 395 #ifndef CAN_SET_SYMLINK_TIMES
 396         if (S_ISLNK(file->mode)) {
 397                 ;
 398         } else
 399 #endif
 400         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 401                 return 0;
 402
 403         if (preserve_perms) {
 404                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 405                         return 0;
 406         } else if (preserve_executability
 407          && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 408                 return 0;
 409
 410         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 411                 return 0;
 412
 413         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 414                 return 0;
 415
 416 #ifdef SUPPORT_ACLS
 417         if (preserve_acls && !S_ISLNK(file->mode)) {
 418                 if (!ACL_READY(*sxp))
 419                         get_acl(fname, sxp);
 420                 if (set_acl(NULL, file, sxp) == 0)
 421                         return 0;
 422         }
 423 #endif
 424 #ifdef SUPPORT_XATTRS
 425         if (preserve_xattrs) {
 426                 if (!XATTR_READY(*sxp))
 427                         get_xattr(fname, sxp);
 428                 if (xattr_diff(file, sxp, 0))
 429                         return 0;
 430         }
 431 #endif
 432
 433         return 1;
 434 }
 435
 436 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 437              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 438              const char *xname)
 439 {
 440         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 441                 int keep_time = !preserve_times ? 0
 442                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 443 #ifdef CAN_SET_SYMLINK_TIMES
 444                     1;
 445 #else
 446                     !S_ISLNK(file->mode);
 447 #endif
 448
 449                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 450                         iflags |= ITEM_REPORT_SIZE;
 451                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 452                         if (iflags & ITEM_LOCAL_CHANGE)
 453                                 iflags |= symlink_timeset_failed_flags;
 454                 } else if (keep_time
 455                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 456                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 457                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 458                         iflags |= ITEM_REPORT_TIME;
 459 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 460                 if (S_ISLNK(file->mode)) {
 461                         ;
 462                 } else
 463 #endif
 464                 if (preserve_perms) {
 465                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 466                                 iflags |= ITEM_REPORT_PERMS;
 467                 } else if (preserve_executability
 468                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 469                         iflags |= ITEM_REPORT_PERMS;
 470                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 471                         iflags |= ITEM_REPORT_OWNER;
 472                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 473                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 474                         iflags |= ITEM_REPORT_GROUP;
 475 #ifdef SUPPORT_ACLS
 476                 if (preserve_acls && !S_ISLNK(file->mode)) {
 477                         if (!ACL_READY(*sxp))
 478                                 get_acl(fnamecmp, sxp);
 479                         if (set_acl(NULL, file, sxp) == 0)
 480                                 iflags |= ITEM_REPORT_ACL;
 481                 }
 482 #endif
 483 #ifdef SUPPORT_XATTRS
 484                 if (preserve_xattrs) {
 485                         if (!XATTR_READY(*sxp))
 486                                 get_xattr(fnamecmp, sxp);
 487                         if (xattr_diff(file, sxp, 1))
 488                                 iflags |= ITEM_REPORT_XATTR;
 489                 }
 490 #endif
 491         } else {
 492 #ifdef SUPPORT_XATTRS
 493                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 494                         iflags |= ITEM_REPORT_XATTR;
 495 #endif
 496                 iflags |= ITEM_IS_NEW;
 497         }
 498
 499         iflags &= 0xffff;
 500         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
 501           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 502                 if (protocol_version >= 29) {
 503                         if (ndx >= 0)
 504                                 write_ndx(sock_f_out, ndx);
 505                         write_shortint(sock_f_out, iflags);
 506                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 507                                 write_byte(sock_f_out, fnamecmp_type);
 508                         if (iflags & ITEM_XNAME_FOLLOWS)
 509                                 write_vstring(sock_f_out, xname, strlen(xname));
 510 #ifdef SUPPORT_XATTRS
 511                         if (preserve_xattrs && do_xfers
 512                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 513                                 send_xattr_request(NULL, file,
 514                                         iflags & ITEM_REPORT_XATTR ? sock_f_out : -1);
 515                         }
 516 #endif
 517                 } else if (ndx >= 0) {
 518                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 519                         log_item(code, file, &stats, iflags, xname);
 520                 }
 521         }
 522 }
 523
 524
 525 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 526 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 527 {
 528         if (st->st_size != F_LENGTH(file))
 529                 return 0;
 530
 531         /* if always checksum is set then we use the checksum instead
 532            of the file time to determine whether to sync */
 533         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 534                 char sum[MAX_DIGEST_LEN];
 535                 file_checksum(fn, sum, st->st_size);
 536                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 537         }
 538
 539         if (size_only > 0)
 540                 return 1;
 541
 542         if (ignore_times)
 543                 return 0;
 544
 545         return cmp_time(st->st_mtime, file->modtime) == 0;
 546 }
 547
 548
 549 /*
 550  * set (initialize) the size entries in the per-file sum_struct
 551  * calculating dynamic block and checksum sizes.
 552  *
 553  * This is only called from generate_and_send_sums() but is a separate
 554  * function to encapsulate the logic.
 555  *
 556  * The block size is a rounded square root of file length.
 557  *
 558  * The checksum size is determined according to:
 559  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 560  * provided by Donovan Baarda which gives a probability of rsync
 561  * algorithm corrupting data and falling back using the whole md4
 562  * checksums.
 563  *
 564  * This might be made one of several selectable heuristics.
 565  */
 566 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 567 {
 568         int32 blength;
 569         int s2length;
 570         int64 l;
 571
 572         if (block_size)
 573                 blength = block_size;
 574         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 575                 blength = BLOCK_SIZE;
 576         else {
 577                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 578                 int32 c;
 579                 int cnt;
 580                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 581                 if (c < 0 || c >= max_blength)
 582                         blength = max_blength;
 583                 else {
 584                     blength = 0;
 585                     do {
 586                             blength |= c;
 587                             if (len < (int64)blength * blength)
 588                                     blength &= ~c;
 589                             c >>= 1;
 590                     } while (c >= 8);   /* round to multiple of 8 */
 591                     blength = MAX(blength, BLOCK_SIZE);
 592                 }
 593         }
 594
 595         if (protocol_version < 27) {
 596                 s2length = csum_length;
 597         } else if (csum_length == SUM_LENGTH) {
 598                 s2length = SUM_LENGTH;
 599         } else {
 600                 int32 c;
 601                 int b = BLOCKSUM_BIAS;
 602                 for (l = len; l >>= 1; b += 2) {}
 603                 for (c = blength; (c >>= 1) && b; b--) {}
 604                 /* add a bit, subtract rollsum, round up. */
 605                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 606                 s2length = MAX(s2length, csum_length);
 607                 s2length = MIN(s2length, SUM_LENGTH);
 608         }
 609
 610         sum->flength    = len;
 611         sum->blength    = blength;
 612         sum->s2length   = s2length;
 613         sum->remainder  = (int32)(len % blength);
 614         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 615
 616         if ((int64)sum->count != l)
 617                 sum->count = -1;
 618
 619         if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
 620                 rprintf(FINFO,
 621                         "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
 622                         big_num(sum->count), (long)sum->remainder, (long)sum->blength,
 623                         sum->s2length, big_num(sum->flength));
 624         }
 625 }
 626
 627
 628 /*
 629  * Generate and send a stream of signatures/checksums that describe a buffer
 630  *
 631  * Generate approximately one checksum every block_len bytes.
 632  */
 633 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 634 {
 635         int32 i;
 636         struct map_struct *mapbuf;
 637         struct sum_struct sum;
 638         OFF_T offset = 0;
 639
 640         sum_sizes_sqroot(&sum, len);
 641         if (sum.count < 0)
 642                 return -1;
 643         write_sum_head(f_out, &sum);
 644
 645         if (append_mode > 0 && f_copy < 0)
 646                 return 0;
 647
 648         if (len > 0)
 649                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 650         else
 651                 mapbuf = NULL;
 652
 653         for (i = 0; i < sum.count; i++) {
 654                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 655                 char *map = map_ptr(mapbuf, offset, n1);
 656                 char sum2[SUM_LENGTH];
 657                 uint32 sum1;
 658
 659                 len -= n1;
 660                 offset += n1;
 661
 662                 if (f_copy >= 0) {
 663                         full_write(f_copy, map, n1);
 664                         if (append_mode > 0)
 665                                 continue;
 666                 }
 667
 668                 sum1 = get_checksum1(map, n1);
 669                 get_checksum2(map, n1, sum2);
 670
 671                 if (DEBUG_GTE(DELTASUM, 3)) {
 672                         rprintf(FINFO,
 673                                 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
 674                                 big_num(i), big_num(offset - n1), (long)n1,
 675                                 (unsigned long)sum1);
 676                 }
 677                 write_int(f_out, sum1);
 678                 write_buf(f_out, sum2, sum.s2length);
 679         }
 680
 681         if (mapbuf)
 682                 unmap_file(mapbuf);
 683
 684         return 0;
 685 }
 686
 687
 688 /* Try to find a filename in the same dir as "fname" with a similar name. */
 689 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 690 {
 691         int fname_len, fname_suf_len;
 692         const char *fname_suf, *fname = file->basename;
 693         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 694         int j, lowest_j = -1;
 695
 696         fname_len = strlen(fname);
 697         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 698
 699         for (j = 0; j < dirlist->used; j++) {
 700                 struct file_struct *fp = dirlist->files[j];
 701                 const char *suf, *name;
 702                 int len, suf_len;
 703                 uint32 dist;
 704
 705                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 706                  || fp->flags & FLAG_FILE_SENT)
 707                         continue;
 708
 709                 name = fp->basename;
 710
 711                 if (F_LENGTH(fp) == F_LENGTH(file)
 712                     && cmp_time(fp->modtime, file->modtime) == 0) {
 713                         if (DEBUG_GTE(FUZZY, 2)) {
 714                                 rprintf(FINFO,
 715                                         "fuzzy size/modtime match for %s\n",
 716                                         name);
 717                         }
 718                         return j;
 719                 }
 720
 721                 len = strlen(name);
 722                 suf = find_filename_suffix(name, len, &suf_len);
 723
 724                 dist = fuzzy_distance(name, len, fname, fname_len);
 725                 /* Add some extra weight to how well the suffixes match. */
 726                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 727                       * 10;
 728                 if (DEBUG_GTE(FUZZY, 2)) {
 729                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 730                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 731                 }
 732                 if (dist <= lowest_dist) {
 733                         lowest_dist = dist;
 734                         lowest_j = j;
 735                 }
 736         }
 737
 738         return lowest_j;
 739 }
 740
 741 /* Copy a file found in our --copy-dest handling. */
 742 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 743 {
 744         char buf[MAXPATHLEN];
 745         const char *copy_to, *partialptr;
 746         int save_preserve_xattrs = preserve_xattrs;
 747         int ok, fd_w;
 748
 749         if (inplace) {
 750                 /* Let copy_file open the destination in place. */
 751                 fd_w = -1;
 752                 copy_to = dest;
 753         } else {
 754                 fd_w = open_tmpfile(buf, dest, file);
 755                 if (fd_w < 0)
 756                         return -1;
 757                 copy_to = buf;
 758         }
 759         cleanup_set(copy_to, NULL, NULL, -1, -1);
 760         if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
 761                 if (INFO_GTE(COPY, 1)) {
 762                         rsyserr(FINFO, errno, "copy_file %s => %s",
 763                                 full_fname(src), copy_to);
 764                 }
 765                 /* Try to clean up. */
 766                 unlink(copy_to);
 767                 cleanup_disable();
 768                 return -1;
 769         }
 770         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 771         preserve_xattrs = 0; /* xattrs were copied with file */
 772         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 773         preserve_xattrs = save_preserve_xattrs;
 774         cleanup_disable();
 775         return ok ? 0 : -1;
 776 }
 777
 778 /* This is only called for regular files.  We return -2 if we've finished
 779  * handling the file, -1 if no dest-linking occurred, or a non-negative
 780  * value if we found an alternate basis file. */
 781 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 782                          char *cmpbuf, stat_x *sxp, int itemizing,
 783                          enum logcode code)
 784 {
 785         int best_match = -1;
 786         int match_level = 0;
 787         int j = 0;
 788
 789         do {
 790                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 791                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 792                         continue;
 793                 switch (match_level) {
 794                 case 0:
 795                         best_match = j;
 796                         match_level = 1;
 797                         /* FALL THROUGH */
 798                 case 1:
 799                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 800                                 continue;
 801                         best_match = j;
 802                         match_level = 2;
 803                         /* FALL THROUGH */
 804                 case 2:
 805                         if (!unchanged_attrs(cmpbuf, file, sxp))
 806                                 continue;
 807                         best_match = j;
 808                         match_level = 3;
 809                         break;
 810                 }
 811                 break;
 812         } while (basis_dir[++j] != NULL);
 813
 814         if (!match_level)
 815                 return -1;
 816
 817         if (j != best_match) {
 818                 j = best_match;
 819                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 820                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 821                         return -1;
 822         }
 823
 824         if (match_level == 3 && !copy_dest) {
 825 #ifdef SUPPORT_HARD_LINKS
 826                 if (link_dest) {
 827                         if (!hard_link_one(file, fname, cmpbuf, 1))
 828                                 goto try_a_copy;
 829                         if (preserve_hard_links && F_IS_HLINKED(file))
 830                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 831                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
 832                                 itemize(cmpbuf, file, ndx, 1, sxp,
 833                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 834                                         0, "");
 835                         }
 836                 } else
 837 #endif
 838                 if (itemizing)
 839                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
 840                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
 841                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 842                 return -2;
 843         }
 844
 845         if (match_level >= 2) {
 846 #ifdef SUPPORT_HARD_LINKS
 847           try_a_copy: /* Copy the file locally. */
 848 #endif
 849                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
 850                         return -1;
 851                 if (itemizing)
 852                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
 853                 if (maybe_ATTRS_REPORT
 854                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
 855                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
 856                         code = match_level == 3 ? FCLIENT : FINFO;
 857                         rprintf(code, "%s%s\n", fname,
 858                                 match_level == 3 ? " is uptodate" : "");
 859                 }
 860 #ifdef SUPPORT_HARD_LINKS
 861                 if (preserve_hard_links && F_IS_HLINKED(file))
 862                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
 863 #endif
 864                 return -2;
 865         }
 866
 867         return FNAMECMP_BASIS_DIR_LOW + j;
 868 }
 869
 870 /* This is only called for non-regular files.  We return -2 if we've finished
 871  * handling the file, or -1 if no dest-linking occurred, or a non-negative
 872  * value if we found an alternate basis file. */
 873 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
 874                          char *cmpbuf, stat_x *sxp, int itemizing,
 875                          enum logcode code)
 876 {
 877         int best_match = -1;
 878         int match_level = 0;
 879         enum nonregtype type;
 880         uint32 *devp;
 881 #ifdef SUPPORT_LINKS
 882         char lnk[MAXPATHLEN];
 883         int len;
 884 #endif
 885         int j = 0;
 886
 887 #ifndef SUPPORT_LINKS
 888         if (S_ISLNK(file->mode))
 889                 return -1;
 890 #endif
 891         if (S_ISDIR(file->mode)) {
 892                 type = TYPE_DIR;
 893         } else if (IS_SPECIAL(file->mode))
 894                 type = TYPE_SPECIAL;
 895         else if (IS_DEVICE(file->mode))
 896                 type = TYPE_DEVICE;
 897 #ifdef SUPPORT_LINKS
 898         else if (S_ISLNK(file->mode))
 899                 type = TYPE_SYMLINK;
 900 #endif
 901         else {
 902                 rprintf(FERROR,
 903                         "internal: try_dests_non() called with invalid mode (%o)\n",
 904                         (int)file->mode);
 905                 exit_cleanup(RERR_UNSUPPORTED);
 906         }
 907
 908         do {
 909                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 910                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 911                         continue;
 912                 switch (type) {
 913                 case TYPE_DIR:
 914                         if (!S_ISDIR(sxp->st.st_mode))
 915                                 continue;
 916                         break;
 917                 case TYPE_SPECIAL:
 918                         if (!IS_SPECIAL(sxp->st.st_mode))
 919                                 continue;
 920                         break;
 921                 case TYPE_DEVICE:
 922                         if (!IS_DEVICE(sxp->st.st_mode))
 923                                 continue;
 924                         break;
 925                 case TYPE_SYMLINK:
 926 #ifdef SUPPORT_LINKS
 927                         if (!S_ISLNK(sxp->st.st_mode))
 928                                 continue;
 929                         break;
 930 #else
 931                         return -1;
 932 #endif
 933                 }
 934                 if (match_level < 1) {
 935                         match_level = 1;
 936                         best_match = j;
 937                 }
 938                 switch (type) {
 939                 case TYPE_DIR:
 940                 case TYPE_SPECIAL:
 941                         break;
 942                 case TYPE_DEVICE:
 943                         devp = F_RDEV_P(file);
 944                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
 945                                 continue;
 946                         break;
 947                 case TYPE_SYMLINK:
 948 #ifdef SUPPORT_LINKS
 949                         if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
 950                                 continue;
 951                         lnk[len] = '\0';
 952                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
 953                                 continue;
 954                         break;
 955 #else
 956                         return -1;
 957 #endif
 958                 }
 959                 if (match_level < 2) {
 960                         match_level = 2;
 961                         best_match = j;
 962                 }
 963                 if (unchanged_attrs(cmpbuf, file, sxp)) {
 964                         match_level = 3;
 965                         best_match = j;
 966                         break;
 967                 }
 968         } while (basis_dir[++j] != NULL);
 969
 970         if (!match_level)
 971                 return -1;
 972
 973         if (j != best_match) {
 974                 j = best_match;
 975                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 976                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 977                         return -1;
 978         }
 979
 980         if (match_level == 3) {
 981 #ifdef SUPPORT_HARD_LINKS
 982                 if (link_dest
 983 #ifndef CAN_HARDLINK_SYMLINK
 984                  && !S_ISLNK(file->mode)
 985 #endif
 986 #ifndef CAN_HARDLINK_SPECIAL
 987                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
 988 #endif
 989                  && !S_ISDIR(file->mode)) {
 990                         if (do_link(cmpbuf, fname) < 0) {
 991                                 rsyserr(FERROR_XFER, errno,
 992                                         "failed to hard-link %s with %s",
 993                                         cmpbuf, fname);
 994                                 return j;
 995                         }
 996                         if (preserve_hard_links && F_IS_HLINKED(file))
 997                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
 998                 } else
 999 #endif
1000                         match_level = 2;
1001                 if (itemizing && stdout_format_has_i
1002                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1003                         int chg = compare_dest && type != TYPE_DIR ? 0
1004                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1005                         char *lp = match_level == 3 ? "" : NULL;
1006                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1007                 }
1008                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1009                         rprintf(FCLIENT, "%s%s is uptodate\n",
1010                                 fname, type == TYPE_DIR ? "/" : "");
1011                 }
1012                 return -2;
1013         }
1014
1015         return j;
1016 }
1017
1018 static void list_file_entry(struct file_struct *f)
1019 {
1020         char permbuf[PERMSTRING_SIZE];
1021         int64 len;
1022         int colwidth = human_readable ? 14 : 11;
1023
1024         if (!F_IS_ACTIVE(f)) {
1025                 /* this can happen if duplicate names were removed */
1026                 return;
1027         }
1028
1029         permstring(permbuf, f->mode);
1030         len = F_LENGTH(f);
1031
1032         /* TODO: indicate '+' if the entry has an ACL. */
1033
1034 #ifdef SUPPORT_LINKS
1035         if (preserve_links && S_ISLNK(f->mode)) {
1036                 rprintf(FINFO, "%s %*s %s %s -> %s\n",
1037                         permbuf, colwidth, comma_num(len),
1038                         timestring(f->modtime), f_name(f, NULL),
1039                         F_SYMLINK(f));
1040         } else
1041 #endif
1042         if (missing_args == 2 && f->mode == 0) {
1043                 rprintf(FINFO, "%-*s %s\n",
1044                         colwidth + 31, "*missing",
1045                         f_name(f, NULL));
1046         } else {
1047                 rprintf(FINFO, "%s %*s %s %s\n",
1048                         permbuf, colwidth, comma_num(len),
1049                         timestring(f->modtime), f_name(f, NULL));
1050         }
1051 }
1052
1053 static int phase = 0;
1054 static int dflt_perms;
1055
1056 static int implied_dirs_are_missing;
1057 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1058 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1059 {
1060         return F_DEPTH(file) > F_DEPTH(subtree)
1061                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1062 }
1063
1064 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1065  * make sure it exists, and has the right permissions/timestamp info.  For
1066  * all other non-regular files (symlinks, etc.) we create them here.  For
1067  * regular files that have changed, we try to find a basis file and then
1068  * start sending checksums.  The ndx is the file's unique index value.
1069  *
1070  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1071  * passed to delete_item(), which can use it during a recursive delete.)
1072  *
1073  * Note that f_out is set to -1 when doing final directory-permission and
1074  * modification-time repair. */
1075 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1076                            int itemizing, enum logcode code, int f_out)
1077 {
1078         static const char *parent_dirname = "";
1079         /* Missing dir not created due to --dry-run; will still be scanned. */
1080         static struct file_struct *dry_missing_dir = NULL;
1081         /* Missing dir whose contents are skipped altogether due to
1082          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1083         static struct file_struct *skip_dir = NULL;
1084         static struct file_list *fuzzy_dirlist = NULL;
1085         static int need_fuzzy_dirlist = 0;
1086         struct file_struct *fuzzy_file = NULL;
1087         int fd = -1, f_copy = -1;
1088         stat_x sx, real_sx;
1089         STRUCT_STAT partial_st;
1090         struct file_struct *back_file = NULL;
1091         int statret, real_ret, stat_errno;
1092         char *fnamecmp, *partialptr, *backupptr = NULL;
1093         char fnamecmpbuf[MAXPATHLEN];
1094         uchar fnamecmp_type;
1095         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1096         int is_dir = !S_ISDIR(file->mode) ? 0
1097                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1098                    : 1;
1099
1100         if (DEBUG_GTE(GENR, 1))
1101                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1102
1103         if (list_only) {
1104                 if (is_dir < 0
1105                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1106                         return;
1107                 list_file_entry(file);
1108                 return;
1109         }
1110
1111         if (skip_dir) {
1112                 if (is_below(file, skip_dir)) {
1113                         if (is_dir)
1114                                 file->flags |= FLAG_MISSING_DIR;
1115 #ifdef SUPPORT_HARD_LINKS
1116                         else if (F_IS_HLINKED(file))
1117                                 handle_skipped_hlink(file, itemizing, code, f_out);
1118 #endif
1119                         return;
1120                 }
1121                 skip_dir = NULL;
1122         }
1123
1124         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1125                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1126                         if (is_dir < 0)
1127                                 return;
1128 #ifdef SUPPORT_HARD_LINKS
1129                         if (F_IS_HLINKED(file))
1130                                 handle_skipped_hlink(file, itemizing, code, f_out);
1131 #endif
1132                         rprintf(FERROR_XFER,
1133                                 "skipping daemon-excluded %s \"%s\"\n",
1134                                 is_dir ? "directory" : "file", fname);
1135                         if (is_dir)
1136                                 goto skipping_dir_contents;
1137                         return;
1138                 }
1139         }
1140
1141         init_stat_x(&sx);
1142         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1143           parent_is_dry_missing:
1144                 if (fuzzy_dirlist) {
1145                         flist_free(fuzzy_dirlist);
1146                         fuzzy_dirlist = NULL;
1147                 }
1148                 parent_dirname = "";
1149                 statret = -1;
1150                 stat_errno = ENOENT;
1151         } else {
1152                 const char *dn = file->dirname ? file->dirname : ".";
1153                 dry_missing_dir = NULL;
1154                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1155                         if (relative_paths && !implied_dirs
1156                          && do_stat(dn, &sx.st) < 0) {
1157                                 if (dry_run)
1158                                         goto parent_is_dry_missing;
1159                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1160                                         rsyserr(FERROR_XFER, errno,
1161                                                 "recv_generator: mkdir %s failed",
1162                                                 full_fname(dn));
1163                                 }
1164                         }
1165                         if (fuzzy_dirlist) {
1166                                 flist_free(fuzzy_dirlist);
1167                                 fuzzy_dirlist = NULL;
1168                         }
1169                         if (fuzzy_basis)
1170                                 need_fuzzy_dirlist = 1;
1171 #ifdef SUPPORT_ACLS
1172                         if (!preserve_perms)
1173                                 dflt_perms = default_perms_for_dir(dn);
1174 #endif
1175                 }
1176                 parent_dirname = dn;
1177
1178                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1179                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1180                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1181                         need_fuzzy_dirlist = 0;
1182                 }
1183
1184                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1185                 stat_errno = errno;
1186         }
1187
1188         if (missing_args == 2 && file->mode == 0) {
1189                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1190                         return;
1191                 if (statret == 0)
1192                         delete_item(fname, sx.st.st_mode, del_opts);
1193                 return;
1194         }
1195
1196         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1197                 if (is_dir) {
1198                         if (is_dir < 0)
1199                                 return;
1200                         skip_dir = file;
1201                         file->flags |= FLAG_MISSING_DIR;
1202                 }
1203 #ifdef SUPPORT_HARD_LINKS
1204                 else if (F_IS_HLINKED(file))
1205                         handle_skipped_hlink(file, itemizing, code, f_out);
1206 #endif
1207                 if (INFO_GTE(SKIP, 1)) {
1208                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1209                                 is_dir ? "directory" : "file", fname);
1210                 }
1211                 return;
1212         }
1213
1214         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1215          && !am_root && sx.st.st_uid == our_uid)
1216                 del_opts |= DEL_NO_UID_WRITE;
1217
1218         if (ignore_existing > 0 && statret == 0
1219          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1220                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1221                         rprintf(FINFO, "%s exists\n", fname);
1222 #ifdef SUPPORT_HARD_LINKS
1223                 if (F_IS_HLINKED(file))
1224                         handle_skipped_hlink(file, itemizing, code, f_out);
1225 #endif
1226                 goto cleanup;
1227         }
1228
1229         if (is_dir) {
1230                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1231                         goto cleanup;
1232                 if (is_dir < 0) {
1233                         /* In inc_recurse mode we want to make sure any missing
1234                          * directories get created while we're still processing
1235                          * the parent dir (which allows us to touch the parent
1236                          * dir's mtime right away).  We will handle the dir in
1237                          * full later (right before we handle its contents). */
1238                         if (statret == 0
1239                          && (S_ISDIR(sx.st.st_mode)
1240                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1241                                 goto cleanup; /* Any errors get reported later. */
1242                         if (do_mkdir(fname, file->mode & 0700) == 0)
1243                                 file->flags |= FLAG_DIR_CREATED;
1244                         goto cleanup;
1245                 }
1246                 /* The file to be received is a directory, so we need
1247                  * to prepare appropriately.  If there is already a
1248                  * file of that name and it is *not* a directory, then
1249                  * we need to delete it.  If it doesn't exist, then
1250                  * (perhaps recursively) create it. */
1251                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1252                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1253                                 goto skipping_dir_contents;
1254                         statret = -1;
1255                 }
1256                 if (dry_run && statret != 0) {
1257                         if (!dry_missing_dir)
1258                                 dry_missing_dir = file;
1259                         file->flags |= FLAG_MISSING_DIR;
1260                 }
1261                 real_ret = statret;
1262                 real_sx = sx;
1263                 if (file->flags & FLAG_DIR_CREATED)
1264                         statret = -1;
1265                 if (!preserve_perms) { /* See comment in non-dir code below. */
1266                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1267                                                dflt_perms, statret == 0);
1268                 }
1269                 if (statret != 0 && basis_dir[0] != NULL) {
1270                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1271                                               itemizing, code);
1272                         if (j == -2) {
1273                                 itemizing = 0;
1274                                 code = FNONE;
1275                                 statret = 1;
1276                         } else if (j >= 0)
1277                                 statret = 1;
1278                 }
1279                 if (itemizing && f_out != -1) {
1280                         itemize(fname, file, ndx, statret, &sx,
1281                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1282                 }
1283                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1284                         if (!relative_paths || errno != ENOENT
1285                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1286                          || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1287                                 rsyserr(FERROR_XFER, errno,
1288                                         "recv_generator: mkdir %s failed",
1289                                         full_fname(fname));
1290                           skipping_dir_contents:
1291                                 rprintf(FERROR,
1292                                     "*** Skipping any contents from this failed directory ***\n");
1293                                 skip_dir = file;
1294                                 file->flags |= FLAG_MISSING_DIR;
1295                                 goto cleanup;
1296                         }
1297                 }
1298 #ifdef SUPPORT_XATTRS
1299                 if (preserve_xattrs && statret == 1)
1300                         copy_xattrs(fnamecmpbuf, fname);
1301 #endif
1302                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1303                     && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1304                         rprintf(code, "%s/\n", fname);
1305
1306                 /* We need to ensure that the dirs in the transfer have writable
1307                  * permissions during the time we are putting files within them.
1308                  * This is then fixed after the transfer is done. */
1309 #ifdef HAVE_CHMOD
1310                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1311                         mode_t mode = file->mode | S_IWUSR;
1312                         if (do_chmod(fname, mode) < 0) {
1313                                 rsyserr(FERROR_XFER, errno,
1314                                         "failed to modify permissions on %s",
1315                                         full_fname(fname));
1316                         }
1317                         need_retouch_dir_perms = 1;
1318                 }
1319 #endif
1320
1321                 if (real_ret != 0 && one_file_system)
1322                         real_sx.st.st_dev = filesystem_dev;
1323                 if (inc_recurse) {
1324                         if (one_file_system) {
1325                                 uint32 *devp = F_DIR_DEV_P(file);
1326                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1327                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1328                         }
1329                 }
1330                 else if (delete_during && f_out != -1 && !phase
1331                     && !(file->flags & FLAG_MISSING_DIR)) {
1332                         if (file->flags & FLAG_CONTENT_DIR)
1333                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1334                         else
1335                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1336                 }
1337                 goto cleanup;
1338         }
1339
1340         /* If we're not preserving permissions, change the file-list's
1341          * mode based on the local permissions and some heuristics. */
1342         if (!preserve_perms) {
1343                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1344                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1345                                        exists);
1346         }
1347
1348 #ifdef SUPPORT_HARD_LINKS
1349         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1350          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1351                 goto cleanup;
1352 #endif
1353
1354         if (preserve_links && S_ISLNK(file->mode)) {
1355 #ifdef SUPPORT_LINKS
1356                 const char *sl = F_SYMLINK(file);
1357                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1358                         if (INFO_GTE(NAME, 1)) {
1359                                 if (solo_file)
1360                                         fname = f_name(file, NULL);
1361                                 rprintf(FINFO,
1362                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1363                                         full_fname(fname), sl);
1364                         }
1365                         return;
1366                 }
1367                 if (statret == 0) {
1368                         char lnk[MAXPATHLEN];
1369                         int len;
1370
1371                         if (S_ISLNK(sx.st.st_mode)
1372                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1373                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1374                                 /* The link is pointing to the right place. */
1375                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1376                                 if (itemizing)
1377                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1378 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1379                                 if (preserve_hard_links && F_IS_HLINKED(file))
1380                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1381 #endif
1382                                 if (remove_source_files == 1)
1383                                         goto return_with_success;
1384                                 goto cleanup;
1385                         }
1386                 } else if (basis_dir[0] != NULL) {
1387                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1388                                               itemizing, code);
1389                         if (j == -2) {
1390 #ifndef CAN_HARDLINK_SYMLINK
1391                                 if (link_dest) {
1392                                         /* Resort to --copy-dest behavior. */
1393                                 } else
1394 #endif
1395                                 if (!copy_dest)
1396                                         goto cleanup;
1397                                 itemizing = 0;
1398                                 code = FNONE;
1399                         } else if (j >= 0)
1400                                 statret = 1;
1401                 }
1402                 if (atomic_create(file, fname, sl, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1403                         set_file_attrs(fname, file, NULL, NULL, 0);
1404                         if (itemizing) {
1405                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1406                                         statret = -1;
1407                                 itemize(fname, file, ndx, statret, &sx,
1408                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1409                         }
1410                         if (code != FNONE && INFO_GTE(NAME, 1))
1411                                 rprintf(code, "%s -> %s\n", fname, sl);
1412 #ifdef SUPPORT_HARD_LINKS
1413                         if (preserve_hard_links && F_IS_HLINKED(file))
1414                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1415 #endif
1416                         /* This does not check remove_source_files == 1
1417                          * because this is one of the items that the old
1418                          * --remove-sent-files option would remove. */
1419                         if (remove_source_files)
1420                                 goto return_with_success;
1421                 }
1422 #endif
1423                 goto cleanup;
1424         }
1425
1426         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1427          || (preserve_specials && IS_SPECIAL(file->mode))) {
1428                 dev_t rdev;
1429                 int del_for_flag = 0;
1430                 if (IS_DEVICE(file->mode)) {
1431                         uint32 *devp = F_RDEV_P(file);
1432                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1433                 } else
1434                         rdev = 0;
1435                 if (statret == 0) {
1436                         if (IS_DEVICE(file->mode)) {
1437                                 if (!IS_DEVICE(sx.st.st_mode))
1438                                         statret = -1;
1439                                 del_for_flag = DEL_FOR_DEVICE;
1440                         } else {
1441                                 if (!IS_SPECIAL(sx.st.st_mode))
1442                                         statret = -1;
1443                                 del_for_flag = DEL_FOR_SPECIAL;
1444                         }
1445                         if (statret == 0
1446                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1447                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1448                                 /* The device or special file is identical. */
1449                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1450                                 if (itemizing)
1451                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1452 #ifdef SUPPORT_HARD_LINKS
1453                                 if (preserve_hard_links && F_IS_HLINKED(file))
1454                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1455 #endif
1456                                 if (remove_source_files == 1)
1457                                         goto return_with_success;
1458                                 goto cleanup;
1459                         }
1460                 } else if (basis_dir[0] != NULL) {
1461                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1462                                               itemizing, code);
1463                         if (j == -2) {
1464 #ifndef CAN_HARDLINK_SPECIAL
1465                                 if (link_dest) {
1466                                         /* Resort to --copy-dest behavior. */
1467                                 } else
1468 #endif
1469                                 if (!copy_dest)
1470                                         goto cleanup;
1471                                 itemizing = 0;
1472                                 code = FNONE;
1473                         } else if (j >= 0)
1474                                 statret = 1;
1475                 }
1476                 if (DEBUG_GTE(GENR, 1)) {
1477                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1478                                 fname, (int)file->mode,
1479                                 (long)major(rdev), (long)minor(rdev));
1480                 }
1481                 if (atomic_create(file, fname, NULL, rdev, &sx, del_for_flag)) {
1482                         set_file_attrs(fname, file, NULL, NULL, 0);
1483                         if (itemizing) {
1484                                 itemize(fname, file, ndx, statret, &sx,
1485                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1486                         }
1487                         if (code != FNONE && INFO_GTE(NAME, 1))
1488                                 rprintf(code, "%s\n", fname);
1489 #ifdef SUPPORT_HARD_LINKS
1490                         if (preserve_hard_links && F_IS_HLINKED(file))
1491                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1492 #endif
1493                         if (remove_source_files == 1)
1494                                 goto return_with_success;
1495                 }
1496                 goto cleanup;
1497         }
1498
1499         if (!S_ISREG(file->mode)) {
1500                 if (solo_file)
1501                         fname = f_name(file, NULL);
1502                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1503                 goto cleanup;
1504         }
1505
1506         if (max_size > 0 && F_LENGTH(file) > max_size) {
1507                 if (INFO_GTE(SKIP, 1)) {
1508                         if (solo_file)
1509                                 fname = f_name(file, NULL);
1510                         rprintf(FINFO, "%s is over max-size\n", fname);
1511                 }
1512                 goto cleanup;
1513         }
1514         if (min_size > 0 && F_LENGTH(file) < min_size) {
1515                 if (INFO_GTE(SKIP, 1)) {
1516                         if (solo_file)
1517                                 fname = f_name(file, NULL);
1518                         rprintf(FINFO, "%s is under min-size\n", fname);
1519                 }
1520                 goto cleanup;
1521         }
1522
1523         if (update_only > 0 && statret == 0
1524             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1525                 if (INFO_GTE(SKIP, 1))
1526                         rprintf(FINFO, "%s is newer\n", fname);
1527 #ifdef SUPPORT_HARD_LINKS
1528                 if (F_IS_HLINKED(file))
1529                         handle_skipped_hlink(file, itemizing, code, f_out);
1530 #endif
1531                 goto cleanup;
1532         }
1533
1534         fnamecmp = fname;
1535         fnamecmp_type = FNAMECMP_FNAME;
1536
1537         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1538                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1539                         goto cleanup;
1540                 statret = -1;
1541                 stat_errno = ENOENT;
1542         }
1543
1544         if (statret != 0 && basis_dir[0] != NULL) {
1545                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1546                                       itemizing, code);
1547                 if (j == -2) {
1548                         if (remove_source_files == 1)
1549                                 goto return_with_success;
1550                         goto cleanup;
1551                 }
1552                 if (j >= 0) {
1553                         fnamecmp = fnamecmpbuf;
1554                         fnamecmp_type = j;
1555                         statret = 0;
1556                 }
1557         }
1558
1559         real_ret = statret;
1560         real_sx = sx;
1561
1562         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1563             && link_stat(partialptr, &partial_st, 0) == 0
1564             && S_ISREG(partial_st.st_mode)) {
1565                 if (statret != 0)
1566                         goto prepare_to_open;
1567         } else
1568                 partialptr = NULL;
1569
1570         if (statret != 0 && fuzzy_dirlist) {
1571                 int j = find_fuzzy(file, fuzzy_dirlist);
1572                 if (j >= 0) {
1573                         fuzzy_file = fuzzy_dirlist->files[j];
1574                         f_name(fuzzy_file, fnamecmpbuf);
1575                         if (DEBUG_GTE(FUZZY, 1)) {
1576                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1577                                         fname, fnamecmpbuf);
1578                         }
1579                         sx.st.st_size = F_LENGTH(fuzzy_file);
1580                         statret = 0;
1581                         fnamecmp = fnamecmpbuf;
1582                         fnamecmp_type = FNAMECMP_FUZZY;
1583                 }
1584         }
1585
1586         if (statret != 0) {
1587 #ifdef SUPPORT_HARD_LINKS
1588                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1589                         cur_flist->in_progress++;
1590                         goto cleanup;
1591                 }
1592 #endif
1593                 if (stat_errno == ENOENT)
1594                         goto notify_others;
1595                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1596                         full_fname(fname));
1597                 goto cleanup;
1598         }
1599
1600         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1601                 ;
1602         else if (fnamecmp_type == FNAMECMP_FUZZY)
1603                 ;
1604         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1605                 if (partialptr) {
1606                         do_unlink(partialptr);
1607                         handle_partial_dir(partialptr, PDIR_DELETE);
1608                 }
1609                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1610                 if (itemizing)
1611                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1612 #ifdef SUPPORT_HARD_LINKS
1613                 if (preserve_hard_links && F_IS_HLINKED(file))
1614                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1615 #endif
1616                 if (remove_source_files != 1)
1617                         goto cleanup;
1618           return_with_success:
1619                 if (!dry_run)
1620                         send_msg_int(MSG_SUCCESS, ndx);
1621                 goto cleanup;
1622         }
1623
1624         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1625 #ifdef SUPPORT_HARD_LINKS
1626                 if (F_IS_HLINKED(file))
1627                         handle_skipped_hlink(file, itemizing, code, f_out);
1628 #endif
1629                 goto cleanup;
1630         }
1631
1632   prepare_to_open:
1633         if (partialptr) {
1634                 sx.st = partial_st;
1635                 fnamecmp = partialptr;
1636                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1637                 statret = 0;
1638         }
1639
1640         if (!do_xfers)
1641                 goto notify_others;
1642
1643         if (read_batch || whole_file) {
1644                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1645                         if (!(backupptr = get_backup_name(fname)))
1646                                 goto cleanup;
1647                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1648                                 goto pretend_missing;
1649                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1650                                 unmake_file(back_file);
1651                                 back_file = NULL;
1652                                 goto cleanup;
1653                         }
1654                 }
1655                 goto notify_others;
1656         }
1657
1658         if (fuzzy_dirlist) {
1659                 int j = flist_find(fuzzy_dirlist, file);
1660                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1661                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1662         }
1663
1664         /* open the file */
1665         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1666                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1667                         full_fname(fnamecmp));
1668           pretend_missing:
1669                 /* pretend the file didn't exist */
1670 #ifdef SUPPORT_HARD_LINKS
1671                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1672                         cur_flist->in_progress++;
1673                         goto cleanup;
1674                 }
1675 #endif
1676                 statret = real_ret = -1;
1677                 goto notify_others;
1678         }
1679
1680         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1681                 if (!(backupptr = get_backup_name(fname))) {
1682                         close(fd);
1683                         goto cleanup;
1684                 }
1685                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1686                         close(fd);
1687                         goto pretend_missing;
1688                 }
1689                 if (robust_unlink(backupptr) && errno != ENOENT) {
1690                         rsyserr(FERROR_XFER, errno, "unlink %s",
1691                                 full_fname(backupptr));
1692                         unmake_file(back_file);
1693                         back_file = NULL;
1694                         close(fd);
1695                         goto cleanup;
1696                 }
1697                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1698                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1699                         unmake_file(back_file);
1700                         back_file = NULL;
1701                         close(fd);
1702                         goto cleanup;
1703                 }
1704                 fnamecmp_type = FNAMECMP_BACKUP;
1705         }
1706
1707         if (DEBUG_GTE(DELTASUM, 3)) {
1708                 rprintf(FINFO, "gen mapped %s of size %s\n",
1709                         fnamecmp, big_num(sx.st.st_size));
1710         }
1711
1712         if (DEBUG_GTE(DELTASUM, 2))
1713                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1714
1715   notify_others:
1716         if (remove_source_files && !delay_updates && !phase && !dry_run)
1717                 increment_active_files(ndx, itemizing, code);
1718         if (inc_recurse && !dry_run)
1719                 cur_flist->in_progress++;
1720 #ifdef SUPPORT_HARD_LINKS
1721         if (preserve_hard_links && F_IS_HLINKED(file))
1722                 file->flags |= FLAG_FILE_SENT;
1723 #endif
1724         write_ndx(f_out, ndx);
1725         if (itemizing) {
1726                 int iflags = ITEM_TRANSFER;
1727                 if (always_checksum > 0)
1728                         iflags |= ITEM_REPORT_CHANGE;
1729                 if (fnamecmp_type != FNAMECMP_FNAME)
1730                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1731                 if (fnamecmp_type == FNAMECMP_FUZZY)
1732                         iflags |= ITEM_XNAME_FOLLOWS;
1733                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1734                         fuzzy_file ? fuzzy_file->basename : NULL);
1735 #ifdef SUPPORT_ACLS
1736                 if (preserve_acls)
1737                         free_acl(&real_sx);
1738 #endif
1739 #ifdef SUPPORT_XATTRS
1740                 if (preserve_xattrs)
1741                         free_xattr(&real_sx);
1742 #endif
1743         }
1744
1745         if (!do_xfers) {
1746 #ifdef SUPPORT_HARD_LINKS
1747                 if (preserve_hard_links && F_IS_HLINKED(file))
1748                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1749 #endif
1750                 goto cleanup;
1751         }
1752         if (read_batch)
1753                 goto cleanup;
1754
1755         if (statret != 0 || whole_file)
1756                 write_sum_head(f_out, NULL);
1757         else if (sx.st.st_size <= 0) {
1758                 write_sum_head(f_out, NULL);
1759                 close(fd);
1760         } else {
1761                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1762                         rprintf(FWARNING,
1763                             "WARNING: file is too large for checksum sending: %s\n",
1764                             fnamecmp);
1765                         write_sum_head(f_out, NULL);
1766                 }
1767                 close(fd);
1768         }
1769
1770   cleanup:
1771         if (back_file) {
1772                 int save_preserve_xattrs = preserve_xattrs;
1773                 if (f_copy >= 0)
1774                         close(f_copy);
1775 #ifdef SUPPORT_XATTRS
1776                 if (preserve_xattrs) {
1777                         copy_xattrs(fname, backupptr);
1778                         preserve_xattrs = 0;
1779                 }
1780 #endif
1781                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1782                 preserve_xattrs = save_preserve_xattrs;
1783                 if (INFO_GTE(BACKUP, 1)) {
1784                         rprintf(FINFO, "backed up %s to %s\n",
1785                                 fname, backupptr);
1786                 }
1787                 unmake_file(back_file);
1788         }
1789
1790 #ifdef SUPPORT_ACLS
1791         if (preserve_acls)
1792                 free_acl(&sx);
1793 #endif
1794 #ifdef SUPPORT_XATTRS
1795         if (preserve_xattrs)
1796                 free_xattr(&sx);
1797 #endif
1798         return;
1799 }
1800
1801 /* If we are replacing an existing hard link, symlink, device, or special file,
1802  * create a temp-name item and rename it into place.  Only a symlink or hard
1803  * link puts a non-NULL value into the lnk arg.  Only a device puts a non-0
1804  * value into the rdev arg.  Specify 0 for the del_for_flag if there is not a
1805  * file to replace.  This returns 1 on success and 0 on failure. */
1806 int atomic_create(struct file_struct *file, char *fname, const char *lnk,
1807                   dev_t rdev, stat_x *sxp, int del_for_flag)
1808 {
1809         char tmpname[MAXPATHLEN];
1810         const char *create_name;
1811         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1812
1813         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1814                 skip_atomic = 1;
1815         else
1816                 skip_atomic = 0;
1817
1818         if (del_for_flag) {
1819                 if (make_backups > 0 && !dir_in_the_way) {
1820                         if (!make_backup(fname, skip_atomic))
1821                                 return 0;
1822                 } else if (skip_atomic) {
1823                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1824                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
1825                                 return 0;
1826                 }
1827         }
1828
1829         create_name = skip_atomic ? fname : tmpname;
1830
1831         if (lnk) {
1832 #ifdef SUPPORT_LINKS
1833                 if (S_ISLNK(file->mode)
1834 #ifdef SUPPORT_HARD_LINKS /* The first symlink in a hard-linked cluster is always created. */
1835                  && (!F_IS_HLINKED(file) || file->flags & FLAG_HLINK_FIRST)
1836 #endif
1837                  ) {
1838                         if (do_symlink(lnk, create_name) < 0) {
1839                                 rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1840                                         full_fname(create_name), lnk);
1841                                 return 0;
1842                         }
1843                 } else
1844 #endif
1845 #ifdef SUPPORT_HARD_LINKS
1846                 if (!hard_link_one(file, create_name, lnk, 0))
1847                         return 0;
1848 #endif
1849         } else {
1850                 if (do_mknod(create_name, file->mode, rdev) < 0) {
1851                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1852                                 full_fname(create_name));
1853                         return 0;
1854                 }
1855         }
1856
1857         if (!skip_atomic) {
1858                 if (do_rename(tmpname, fname) < 0) {
1859                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
1860                                 full_fname(tmpname), full_fname(fname));
1861                         do_unlink(tmpname);
1862                         return 0;
1863                 }
1864         }
1865
1866         return 1;
1867 }
1868
1869 #ifdef SUPPORT_HARD_LINKS
1870 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1871                                  enum logcode code, int f_out)
1872 {
1873         char fbuf[MAXPATHLEN];
1874         int new_last_ndx;
1875         struct file_list *save_flist = cur_flist;
1876
1877         /* If we skip the last item in a chain of links and there was a
1878          * prior non-skipped hard-link waiting to finish, finish it now. */
1879         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1880                 return;
1881
1882         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1883         cur_flist->in_progress--; /* undo prior increment */
1884         f_name(file, fbuf);
1885         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1886
1887         cur_flist = save_flist;
1888 }
1889 #endif
1890
1891 static void touch_up_dirs(struct file_list *flist, int ndx)
1892 {
1893         static int counter = 0;
1894         struct file_struct *file;
1895         char *fname;
1896         int i, start, end;
1897
1898         if (ndx < 0) {
1899                 start = 0;
1900                 end = flist->used - 1;
1901         } else
1902                 start = end = ndx;
1903
1904         /* Fix any directory permissions that were modified during the
1905          * transfer and/or re-set any tweaked modified-time values. */
1906         for (i = start; i <= end; i++, counter++) {
1907                 file = flist->files[i];
1908                 if (!S_ISDIR(file->mode)
1909                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1910                         continue;
1911                 if (DEBUG_GTE(TIME, 2)) {
1912                         fname = f_name(file, NULL);
1913                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
1914                                 NS(fname), i);
1915                 }
1916                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
1917                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
1918                         continue;
1919                 fname = f_name(file, NULL);
1920                 if (!(file->mode & S_IWUSR))
1921                         do_chmod(fname, file->mode);
1922                 if (need_retouch_dir_times) {
1923                         STRUCT_STAT st;
1924                         if (link_stat(fname, &st, 0) == 0
1925                          && cmp_time(st.st_mtime, file->modtime) != 0)
1926                                 set_modtime(fname, file->modtime, file->mode);
1927                 }
1928                 if (counter >= loopchk_limit) {
1929                         if (allowed_lull)
1930                                 maybe_send_keepalive();
1931                         else
1932                                 maybe_flush_socket(0);
1933                         counter = 0;
1934                 }
1935         }
1936 }
1937
1938 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
1939 {
1940         struct file_struct *file;
1941         struct file_list *flist;
1942         char fbuf[MAXPATHLEN];
1943         int ndx;
1944
1945         while (1) {
1946 #ifdef SUPPORT_HARD_LINKS
1947                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
1948                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
1949                         file = flist->files[ndx - flist->ndx_start];
1950                         assert(file->flags & FLAG_HLINKED);
1951                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
1952                         flist->in_progress--;
1953                         continue;
1954                 }
1955 #endif
1956
1957                 if (check_redo && (ndx = get_redo_num()) != -1) {
1958                         csum_length = SUM_LENGTH;
1959                         max_size = -max_size;
1960                         min_size = -min_size;
1961                         ignore_existing = -ignore_existing;
1962                         ignore_non_existing = -ignore_non_existing;
1963                         update_only = -update_only;
1964                         always_checksum = -always_checksum;
1965                         size_only = -size_only;
1966                         append_mode = -append_mode;
1967                         make_backups = -make_backups; /* avoid dup backup w/inplace */
1968                         ignore_times++;
1969
1970                         flist = cur_flist;
1971                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
1972
1973                         file = cur_flist->files[ndx - cur_flist->ndx_start];
1974                         if (solo_file)
1975                                 strlcpy(fbuf, solo_file, sizeof fbuf);
1976                         else
1977                                 f_name(file, fbuf);
1978                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
1979                         cur_flist->to_redo--;
1980
1981                         cur_flist = flist;
1982
1983                         csum_length = SHORT_SUM_LENGTH;
1984                         max_size = -max_size;
1985                         min_size = -min_size;
1986                         ignore_existing = -ignore_existing;
1987                         ignore_non_existing = -ignore_non_existing;
1988                         update_only = -update_only;
1989                         always_checksum = -always_checksum;
1990                         size_only = -size_only;
1991                         append_mode = -append_mode;
1992                         make_backups = -make_backups;
1993                         ignore_times--;
1994                         continue;
1995                 }
1996
1997                 if (cur_flist == first_flist)
1998                         break;
1999
2000                 /* We only get here if inc_recurse is enabled. */
2001                 if (first_flist->in_progress || first_flist->to_redo)
2002                         break;
2003
2004                 write_ndx(sock_f_out, NDX_DONE);
2005                 if (!read_batch && !flist_eof) {
2006                         int old_total = 0;
2007                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2008                                 old_total += flist->used;
2009                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2010                 }
2011
2012                 if (delete_during == 2 || !dir_tweaking) {
2013                         /* Skip directory touch-up. */
2014                 } else if (first_flist->parent_ndx >= 0)
2015                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2016
2017                 flist_free(first_flist); /* updates first_flist */
2018         }
2019 }
2020
2021 void generate_files(int f_out, const char *local_name)
2022 {
2023         int i, ndx, next_loopchk = 0;
2024         char fbuf[MAXPATHLEN];
2025         int itemizing;
2026         enum logcode code;
2027         int save_info_flist = info_levels[INFO_FLIST];
2028         int save_info_progress = info_levels[INFO_PROGRESS];
2029
2030         if (protocol_version >= 29) {
2031                 itemizing = 1;
2032                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2033                 code = logfile_format_has_i ? FNONE : FLOG;
2034         } else if (am_daemon) {
2035                 itemizing = logfile_format_has_i && do_xfers;
2036                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2037                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2038         } else if (!am_server) {
2039                 itemizing = stdout_format_has_i;
2040                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2041                 code = itemizing ? FNONE : FINFO;
2042         } else {
2043                 itemizing = 0;
2044                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2045                 code = FINFO;
2046         }
2047         solo_file = local_name;
2048         dir_tweaking = !(list_only || solo_file || dry_run);
2049         need_retouch_dir_times = preserve_times > 1;
2050         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2051         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2052             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2053         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2054
2055         if (DEBUG_GTE(GENR, 1))
2056                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2057
2058         if (delete_before && !solo_file && cur_flist->used > 0)
2059                 do_delete_pass();
2060         if (delete_during == 2) {
2061                 deldelay_size = BIGPATHBUFLEN * 4;
2062                 deldelay_buf = new_array(char, deldelay_size);
2063                 if (!deldelay_buf)
2064                         out_of_memory("delete-delay");
2065         }
2066         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2067
2068         if (append_mode > 0 || whole_file < 0)
2069                 whole_file = 0;
2070         if (DEBUG_GTE(FLIST, 1)) {
2071                 rprintf(FINFO, "delta-transmission %s\n",
2072                         whole_file
2073                         ? "disabled for local transfer or --whole-file"
2074                         : "enabled");
2075         }
2076
2077         /* Since we often fill up the outgoing socket and then just sit around
2078          * waiting for the other 2 processes to do their thing, we don't want
2079          * to exit on a timeout.  If the data stops flowing, the receiver will
2080          * notice that and let us know via the redo pipe (or its closing). */
2081         ignore_timeout = 1;
2082
2083         dflt_perms = (ACCESSPERMS & ~orig_umask);
2084
2085         do {
2086 #ifdef SUPPORT_HARD_LINKS
2087                 if (preserve_hard_links && inc_recurse) {
2088                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2089                                 wait_for_receiver();
2090                 }
2091 #endif
2092
2093                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2094                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2095                         if (solo_file)
2096                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2097                         else
2098                                 f_name(fp, fbuf);
2099                         ndx = cur_flist->ndx_start - 1;
2100                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2101                         if (delete_during && dry_run < 2 && !list_only
2102                          && !(fp->flags & FLAG_MISSING_DIR)) {
2103                                 if (fp->flags & FLAG_CONTENT_DIR) {
2104                                         dev_t dirdev;
2105                                         if (one_file_system) {
2106                                                 uint32 *devp = F_DIR_DEV_P(fp);
2107                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2108                                         } else
2109                                                 dirdev = MAKEDEV(0, 0);
2110                                         delete_in_dir(fbuf, fp, &dirdev);
2111                                 } else
2112                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2113                         }
2114                 }
2115                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2116                         struct file_struct *file = cur_flist->sorted[i];
2117
2118                         if (!F_IS_ACTIVE(file))
2119                                 continue;
2120
2121                         if (unsort_ndx)
2122                                 ndx = F_NDX(file);
2123                         else
2124                                 ndx = i + cur_flist->ndx_start;
2125
2126                         if (solo_file)
2127                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2128                         else
2129                                 f_name(file, fbuf);
2130                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2131
2132                         check_for_finished_files(itemizing, code, 0);
2133
2134                         if (i + cur_flist->ndx_start >= next_loopchk) {
2135                                 if (allowed_lull)
2136                                         maybe_send_keepalive();
2137                                 else
2138                                         maybe_flush_socket(0);
2139                                 next_loopchk += loopchk_limit;
2140                         }
2141                 }
2142
2143                 if (!inc_recurse) {
2144                         write_ndx(f_out, NDX_DONE);
2145                         break;
2146                 }
2147
2148                 while (1) {
2149                         check_for_finished_files(itemizing, code, 1);
2150                         if (cur_flist->next || flist_eof)
2151                                 break;
2152                         wait_for_receiver();
2153                 }
2154         } while ((cur_flist = cur_flist->next) != NULL);
2155
2156         if (delete_during)
2157                 delete_in_dir(NULL, NULL, &dev_zero);
2158         phase++;
2159         if (DEBUG_GTE(GENR, 1))
2160                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2161
2162         while (1) {
2163                 check_for_finished_files(itemizing, code, 1);
2164                 if (msgdone_cnt)
2165                         break;
2166                 wait_for_receiver();
2167         }
2168
2169         phase++;
2170         if (DEBUG_GTE(GENR, 1))
2171                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2172
2173         write_ndx(f_out, NDX_DONE);
2174
2175         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2176         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2177                 write_ndx(f_out, NDX_DONE);
2178
2179         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2180                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2181                         write_del_stats(f_out);
2182                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2183                         write_ndx(f_out, NDX_DONE);
2184         }
2185
2186         /* Read MSG_DONE for the redo phase (and any prior messages). */
2187         while (1) {
2188                 check_for_finished_files(itemizing, code, 0);
2189                 if (msgdone_cnt > 1)
2190                         break;
2191                 wait_for_receiver();
2192         }
2193
2194         if (protocol_version >= 29) {
2195                 phase++;
2196                 if (DEBUG_GTE(GENR, 1))
2197                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2198                 if (!EARLY_DELAY_DONE_MSG()) {
2199                         write_ndx(f_out, NDX_DONE);
2200                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2201                                 write_ndx(f_out, NDX_DONE);
2202                 }
2203                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2204                 while (msgdone_cnt == 2)
2205                         wait_for_receiver();
2206         }
2207
2208         info_levels[INFO_FLIST] = save_info_flist;
2209         info_levels[INFO_PROGRESS] = save_info_progress;
2210
2211         if (delete_during == 2)
2212                 do_delayed_deletions(fbuf);
2213         if (delete_after && !solo_file && file_total > 0)
2214                 do_delete_pass();
2215
2216         if (max_delete >= 0 && skipped_deletes) {
2217                 rprintf(FWARNING,
2218                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2219                         skipped_deletes);
2220                 io_error |= IOERR_DEL_LIMIT;
2221         }
2222
2223         if (protocol_version >= 31) {
2224                 if (!EARLY_DELETE_DONE_MSG()) {
2225                         if (INFO_GTE(STATS, 2) || read_batch)
2226                                 write_del_stats(f_out);
2227                         write_ndx(f_out, NDX_DONE);
2228                 }
2229
2230                 /* Read MSG_DONE for late-delete phase & prior messages. */
2231                 while (msgdone_cnt == 3)
2232                         wait_for_receiver();
2233         }
2234
2235         if ((need_retouch_dir_perms || need_retouch_dir_times)
2236          && dir_tweaking && (!inc_recurse || delete_during == 2))
2237                 touch_up_dirs(dir_flist, -1);
2238
2239         if (DEBUG_GTE(GENR, 1))
2240                 rprintf(FINFO, "generate_files finished\n");
2241 }