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) 2003-2008 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
  25 extern int verbose;
  26 extern int dry_run;
  27 extern int do_xfers;
  28 extern int stdout_format_has_i;
  29 extern int logfile_format_has_i;
  30 extern int am_root;
  31 extern int am_server;
  32 extern int am_daemon;
  33 extern int inc_recurse;
  34 extern int do_progress;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_acls;
  39 extern int preserve_xattrs;
  40 extern int preserve_links;
  41 extern int preserve_devices;
  42 extern int preserve_specials;
  43 extern int preserve_hard_links;
  44 extern int preserve_executability;
  45 extern int preserve_perms;
  46 extern int preserve_times;
  47 extern int uid_ndx;
  48 extern int gid_ndx;
  49 extern int delete_mode;
  50 extern int delete_before;
  51 extern int delete_during;
  52 extern int delete_after;
  53 extern int msgdone_cnt;
  54 extern int ignore_errors;
  55 extern int remove_source_files;
  56 extern int delay_updates;
  57 extern int update_only;
  58 extern int ignore_existing;
  59 extern int ignore_non_existing;
  60 extern int inplace;
  61 extern int append_mode;
  62 extern int make_backups;
  63 extern int csum_length;
  64 extern int ignore_times;
  65 extern int size_only;
  66 extern OFF_T max_size;
  67 extern OFF_T min_size;
  68 extern int io_error;
  69 extern int flist_eof;
  70 extern int allowed_lull;
  71 extern int sock_f_out;
  72 extern int ignore_timeout;
  73 extern int protocol_version;
  74 extern int file_total;
  75 extern int fuzzy_basis;
  76 extern int always_checksum;
  77 extern int checksum_len;
  78 extern char *partial_dir;
  79 extern char *basis_dir[];
  80 extern int compare_dest;
  81 extern int copy_dest;
  82 extern int link_dest;
  83 extern int whole_file;
  84 extern int list_only;
  85 extern int read_batch;
  86 extern int safe_symlinks;
  87 extern long block_size; /* "long" because popt can't set an int32. */
  88 extern int unsort_ndx;
  89 extern int max_delete;
  90 extern int force_delete;
  91 extern int one_file_system;
  92 extern struct stats stats;
  93 extern dev_t filesystem_dev;
  94 extern mode_t orig_umask;
  95 extern uid_t our_uid;
  96 extern char *backup_dir;
  97 extern char *backup_suffix;
  98 extern int backup_suffix_len;
  99 extern struct file_list *cur_flist, *first_flist, *dir_flist;
 100 extern struct filter_list_struct server_filter_list;
 101
 102 int ignore_perishable = 0;
 103 int non_perishable_cnt = 0;
 104 int maybe_ATTRS_REPORT = 0;
 105
 106 static dev_t dev_zero;
 107 static int deletion_count = 0; /* used to implement --max-delete */
 108 static int deldelay_size = 0, deldelay_cnt = 0;
 109 static char *deldelay_buf = NULL;
 110 static int deldelay_fd = -1;
 111 static int lull_mod;
 112 static int dir_tweaking;
 113 static int symlink_timeset_failed_flags;
 114 static int need_retouch_dir_times;
 115 static int need_retouch_dir_perms;
 116 static const char *solo_file = NULL;
 117
 118 /* For calling delete_item() and delete_dir_contents(). */
 119 #define DEL_NO_UID_WRITE        (1<<0) /* file/dir has our uid w/o write perm */
 120 #define DEL_RECURSE             (1<<1) /* if dir, delete all contents */
 121 #define DEL_DIR_IS_EMPTY        (1<<2) /* internal delete_FUNCTIONS use only */
 122 #define DEL_FOR_FILE            (1<<3) /* making room for a replacement file */
 123 #define DEL_FOR_DIR             (1<<4) /* making room for a replacement dir */
 124 #define DEL_FOR_SYMLINK         (1<<5) /* making room for a replacement symlink */
 125 #define DEL_FOR_DEVICE          (1<<6) /* making room for a replacement device */
 126 #define DEL_FOR_SPECIAL         (1<<7) /* making room for a replacement special */
 127
 128 #define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL)
 129
 130 enum nonregtype {
 131     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 132 };
 133
 134 enum delret {
 135     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
 136 };
 137
 138 /* Forward declarations. */
 139 static enum delret delete_dir_contents(char *fname, uint16 flags);
 140 #ifdef SUPPORT_HARD_LINKS
 141 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 142                                  enum logcode code, int f_out);
 143 #endif
 144
 145 static int is_backup_file(char *fn)
 146 {
 147         int k = strlen(fn) - backup_suffix_len;
 148         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 149 }
 150
 151 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
 152  * delete recursively.
 153  *
 154  * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
 155  * a directory! (The buffer is used for recursion, but returned unchanged.)
 156  */
 157 static enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
 158 {
 159         enum delret ret;
 160         char *what;
 161         int ok;
 162
 163         if (verbose > 2) {
 164                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
 165                         fbuf, (int)mode, (int)flags);
 166         }
 167
 168         if (flags & DEL_NO_UID_WRITE)
 169                 do_chmod(fbuf, mode | S_IWUSR);
 170
 171         if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
 172                 int save_uid_ndx = uid_ndx;
 173                 /* This only happens on the first call to delete_item() since
 174                  * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
 175                 if (!uid_ndx)
 176                         uid_ndx = ++file_extra_cnt;
 177                 ignore_perishable = 1;
 178                 /* If DEL_RECURSE is not set, this just reports emptiness. */
 179                 ret = delete_dir_contents(fbuf, flags);
 180                 ignore_perishable = 0;
 181                 if (!save_uid_ndx) {
 182                         --file_extra_cnt;
 183                         uid_ndx = 0;
 184                 }
 185                 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
 186                         goto check_ret;
 187                 /* OK: try to delete the directory. */
 188         }
 189
 190         if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && ++deletion_count > max_delete)
 191                 return DR_AT_LIMIT;
 192
 193         if (S_ISDIR(mode)) {
 194                 what = "rmdir";
 195                 ok = do_rmdir(fbuf) == 0;
 196         } else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
 197                 what = "make_backup";
 198                 ok = make_backup(fbuf);
 199         } else {
 200                 what = "unlink";
 201                 ok = robust_unlink(fbuf) == 0;
 202         }
 203
 204         if (ok) {
 205                 if (!(flags & DEL_MAKE_ROOM))
 206                         log_delete(fbuf, mode);
 207                 ret = DR_SUCCESS;
 208         } else {
 209                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
 210                         rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 211                                 fbuf);
 212                         ret = DR_NOT_EMPTY;
 213                 } else if (errno != ENOENT) {
 214                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
 215                                 what, fbuf);
 216                         ret = DR_FAILURE;
 217                 } else {
 218                         deletion_count--;
 219                         ret = DR_SUCCESS;
 220                 }
 221         }
 222
 223   check_ret:
 224         if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
 225                 const char *desc;
 226                 switch (flags & DEL_MAKE_ROOM) {
 227                 case DEL_FOR_FILE: desc = "regular file"; break;
 228                 case DEL_FOR_DIR: desc = "directory"; break;
 229                 case DEL_FOR_SYMLINK: desc = "symlink"; break;
 230                 case DEL_FOR_DEVICE: desc = "device file"; break;
 231                 case DEL_FOR_SPECIAL: desc = "special file"; break;
 232                 default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
 233                 }
 234                 rprintf(FERROR_XFER, "could not make way for new %s: %s\n",
 235                         desc, fbuf);
 236         }
 237         return ret;
 238 }
 239
 240 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
 241  * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
 242  * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
 243  * buffer is used for recursion, but returned unchanged.)
 244  */
 245 static enum delret delete_dir_contents(char *fname, uint16 flags)
 246 {
 247         struct file_list *dirlist;
 248         enum delret ret;
 249         unsigned remainder;
 250         void *save_filters;
 251         int j, dlen;
 252         char *p;
 253
 254         if (verbose > 3) {
 255                 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
 256                         fname, flags);
 257         }
 258
 259         dlen = strlen(fname);
 260         save_filters = push_local_filters(fname, dlen);
 261
 262         non_perishable_cnt = 0;
 263         dirlist = get_dirlist(fname, dlen, 0);
 264         ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
 265
 266         if (!dirlist->used)
 267                 goto done;
 268
 269         if (!(flags & DEL_RECURSE)) {
 270                 ret = DR_NOT_EMPTY;
 271                 goto done;
 272         }
 273
 274         p = fname + dlen;
 275         if (dlen != 1 || *fname != '/')
 276                 *p++ = '/';
 277         remainder = MAXPATHLEN - (p - fname);
 278
 279         /* We do our own recursion, so make delete_item() non-recursive. */
 280         flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
 281               | DEL_DIR_IS_EMPTY;
 282
 283         for (j = dirlist->used; j--; ) {
 284                 struct file_struct *fp = dirlist->files[j];
 285
 286                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 287                         if (verbose > 1) {
 288                                 rprintf(FINFO,
 289                                     "mount point, %s, pins parent directory\n",
 290                                     f_name(fp, NULL));
 291                         }
 292                         ret = DR_NOT_EMPTY;
 293                         continue;
 294                 }
 295
 296                 strlcpy(p, fp->basename, remainder);
 297                 if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 298                         do_chmod(fname, fp->mode | S_IWUSR);
 299                 /* Save stack by recursing to ourself directly. */
 300                 if (S_ISDIR(fp->mode)) {
 301                         if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
 302                                 ret = DR_NOT_EMPTY;
 303                 }
 304                 if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
 305                         ret = DR_NOT_EMPTY;
 306         }
 307
 308         fname[dlen] = '\0';
 309
 310   done:
 311         flist_free(dirlist);
 312         pop_local_filters(save_filters);
 313
 314         if (ret == DR_NOT_EMPTY) {
 315                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 316                         fname);
 317         }
 318         return ret;
 319 }
 320
 321 static int start_delete_delay_temp(void)
 322 {
 323         char fnametmp[MAXPATHLEN];
 324         int save_dry_run = dry_run;
 325
 326         dry_run = 0;
 327         if (!get_tmpname(fnametmp, "deldelay")
 328          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 329                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 330                         inc_recurse ? "" : " -- switching to --delete-after");
 331                 delete_during = 0;
 332                 delete_after = !inc_recurse;
 333                 dry_run = save_dry_run;
 334                 return 0;
 335         }
 336         unlink(fnametmp);
 337         dry_run = save_dry_run;
 338         return 1;
 339 }
 340
 341 static int flush_delete_delay(void)
 342 {
 343         if (deldelay_fd < 0 && !start_delete_delay_temp())
 344                 return 0;
 345         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 346                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 347                 delete_during = 0;
 348                 delete_after = !inc_recurse;
 349                 close(deldelay_fd);
 350                 return 0;
 351         }
 352         deldelay_cnt = 0;
 353         return 1;
 354 }
 355
 356 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 357 {
 358         int len;
 359
 360         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 361                 return 0;
 362
 363         if (flags & DEL_NO_UID_WRITE)
 364                 deldelay_buf[deldelay_cnt++] = '!';
 365
 366         while (1) {
 367                 len = snprintf(deldelay_buf + deldelay_cnt,
 368                                deldelay_size - deldelay_cnt,
 369                                "%x %s%c",
 370                                (int)file->mode, fname, '\0');
 371                 if ((deldelay_cnt += len) <= deldelay_size)
 372                         break;
 373                 deldelay_cnt -= len;
 374                 if (!flush_delete_delay())
 375                         return 0;
 376         }
 377
 378         return 1;
 379 }
 380
 381 static int read_delay_line(char *buf, int *flags_p)
 382 {
 383         static int read_pos = 0;
 384         int j, len, mode;
 385         char *bp, *past_space;
 386
 387         while (1) {
 388                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 389                 if (j < deldelay_cnt)
 390                         break;
 391                 if (deldelay_fd < 0) {
 392                         if (j > read_pos)
 393                                 goto invalid_data;
 394                         return -1;
 395                 }
 396                 deldelay_cnt -= read_pos;
 397                 if (deldelay_cnt == deldelay_size)
 398                         goto invalid_data;
 399                 if (deldelay_cnt && read_pos) {
 400                         memmove(deldelay_buf, deldelay_buf + read_pos,
 401                                 deldelay_cnt);
 402                 }
 403                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 404                            deldelay_size - deldelay_cnt);
 405                 if (len == 0) {
 406                         if (deldelay_cnt) {
 407                                 rprintf(FERROR,
 408                                     "ERROR: unexpected EOF in delete-delay file.\n");
 409                         }
 410                         return -1;
 411                 }
 412                 if (len < 0) {
 413                         rsyserr(FERROR, errno,
 414                                 "reading delete-delay file");
 415                         return -1;
 416                 }
 417                 deldelay_cnt += len;
 418                 read_pos = 0;
 419         }
 420
 421         bp = deldelay_buf + read_pos;
 422         if (*bp == '!') {
 423                 bp++;
 424                 *flags_p = DEL_NO_UID_WRITE;
 425         } else
 426                 *flags_p = 0;
 427
 428         if (sscanf(bp, "%x ", &mode) != 1) {
 429           invalid_data:
 430                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 431                 return -1;
 432         }
 433         past_space = strchr(bp, ' ') + 1;
 434         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 435         read_pos = j + 1;
 436
 437         if (len > MAXPATHLEN) {
 438                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 439                 return -1;
 440         }
 441
 442         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 443          * instead of returning a pointer to our buffer. */
 444         memcpy(buf, past_space, len);
 445
 446         return mode;
 447 }
 448
 449 static void do_delayed_deletions(char *delbuf)
 450 {
 451         int mode, flags;
 452
 453         if (deldelay_fd >= 0) {
 454                 if (deldelay_cnt && !flush_delete_delay())
 455                         return;
 456                 lseek(deldelay_fd, 0, 0);
 457         }
 458         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 459                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 460         if (deldelay_fd >= 0)
 461                 close(deldelay_fd);
 462 }
 463
 464 /* This function is used to implement per-directory deletion, and is used by
 465  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 466  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 467  * call will append names onto the end, but the old dir value will be restored
 468  * on exit). */
 469 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 470 {
 471         static int already_warned = 0;
 472         struct file_list *dirlist;
 473         char delbuf[MAXPATHLEN];
 474         int dlen, i;
 475         int save_uid_ndx = uid_ndx;
 476
 477         if (!fbuf) {
 478                 change_local_filter_dir(NULL, 0, 0);
 479                 return;
 480         }
 481
 482         if (verbose > 2)
 483                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 484
 485         if (allowed_lull)
 486                 maybe_send_keepalive();
 487
 488         if (io_error && !ignore_errors) {
 489                 if (already_warned)
 490                         return;
 491                 rprintf(FINFO,
 492                         "IO error encountered -- skipping file deletion\n");
 493                 already_warned = 1;
 494                 return;
 495         }
 496
 497         dlen = strlen(fbuf);
 498         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 499
 500         if (one_file_system) {
 501                 if (file->flags & FLAG_TOP_DIR)
 502                         filesystem_dev = *fs_dev;
 503                 else if (filesystem_dev != *fs_dev)
 504                         return;
 505         }
 506
 507         if (!uid_ndx)
 508                 uid_ndx = ++file_extra_cnt;
 509
 510         dirlist = get_dirlist(fbuf, dlen, 0);
 511
 512         /* If an item in dirlist is not found in flist, delete it
 513          * from the filesystem. */
 514         for (i = dirlist->used; i--; ) {
 515                 struct file_struct *fp = dirlist->files[i];
 516                 if (!F_IS_ACTIVE(fp))
 517                         continue;
 518                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 519                         if (verbose > 1)
 520                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 521                                         f_name(fp, NULL));
 522                         continue;
 523                 }
 524                 if (flist_find(cur_flist, fp) < 0) {
 525                         int flags = DEL_RECURSE;
 526                         if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 527                                 flags |= DEL_NO_UID_WRITE;
 528                         f_name(fp, delbuf);
 529                         if (delete_during == 2) {
 530                                 if (!remember_delete(fp, delbuf, flags))
 531                                         break;
 532                         } else
 533                                 delete_item(delbuf, fp->mode, flags);
 534                 }
 535         }
 536
 537         flist_free(dirlist);
 538
 539         if (!save_uid_ndx) {
 540                 --file_extra_cnt;
 541                 uid_ndx = 0;
 542         }
 543 }
 544
 545 /* This deletes any files on the receiving side that are not present on the
 546  * sending side.  This is used by --delete-before and --delete-after. */
 547 static void do_delete_pass(void)
 548 {
 549         char fbuf[MAXPATHLEN];
 550         STRUCT_STAT st;
 551         int j;
 552
 553         /* dry_run is incremented when the destination doesn't exist yet. */
 554         if (dry_run > 1 || list_only)
 555                 return;
 556
 557         for (j = 0; j < cur_flist->used; j++) {
 558                 struct file_struct *file = cur_flist->sorted[j];
 559
 560                 if (!(file->flags & FLAG_CONTENT_DIR))
 561                         continue;
 562
 563                 f_name(file, fbuf);
 564                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 565                         rprintf(FINFO, "deleting in %s\n", fbuf);
 566
 567                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 568                  || !S_ISDIR(st.st_mode))
 569                         continue;
 570
 571                 delete_in_dir(fbuf, file, &st.st_dev);
 572         }
 573         delete_in_dir(NULL, NULL, &dev_zero);
 574
 575         if (do_progress && !am_server)
 576                 rprintf(FINFO, "                    \r");
 577 }
 578
 579 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 580 {
 581 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
 582         if (S_ISLNK(file->mode)) {
 583                 ;
 584         } else
 585 #endif
 586         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 587                 return 0;
 588
 589         if (preserve_perms) {
 590                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 591                         return 0;
 592         } else if (preserve_executability
 593          && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 594                 return 0;
 595
 596         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 597                 return 0;
 598
 599         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 600                 return 0;
 601
 602 #ifdef SUPPORT_ACLS
 603         if (preserve_acls && !S_ISLNK(file->mode)) {
 604                 if (!ACL_READY(*sxp))
 605                         get_acl(fname, sxp);
 606                 if (set_acl(NULL, file, sxp) == 0)
 607                         return 0;
 608         }
 609 #endif
 610 #ifdef SUPPORT_XATTRS
 611         if (preserve_xattrs) {
 612                 if (!XATTR_READY(*sxp))
 613                         get_xattr(fname, sxp);
 614                 if (xattr_diff(file, sxp, 0))
 615                         return 0;
 616         }
 617 #endif
 618
 619         return 1;
 620 }
 621
 622 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 623              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 624              const char *xname)
 625 {
 626         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 627                 int keep_time = !preserve_times ? 0
 628                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 629 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 630                     1;
 631 #else
 632                     !S_ISLNK(file->mode);
 633 #endif
 634
 635                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 636                         iflags |= ITEM_REPORT_SIZE;
 637                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 638                         if (iflags & ITEM_LOCAL_CHANGE)
 639                                 iflags |= symlink_timeset_failed_flags;
 640                 } else if (keep_time
 641                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 642                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 643                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 644                         iflags |= ITEM_REPORT_TIME;
 645 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 646                 if (S_ISLNK(file->mode)) {
 647                         ;
 648                 } else
 649 #endif
 650                 if (preserve_perms) {
 651                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 652                                 iflags |= ITEM_REPORT_PERMS;
 653                 } else if (preserve_executability
 654                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 655                         iflags |= ITEM_REPORT_PERMS;
 656                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 657                         iflags |= ITEM_REPORT_OWNER;
 658                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 659                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 660                         iflags |= ITEM_REPORT_GROUP;
 661 #ifdef SUPPORT_ACLS
 662                 if (preserve_acls && !S_ISLNK(file->mode)) {
 663                         if (!ACL_READY(*sxp))
 664                                 get_acl(fnamecmp, sxp);
 665                         if (set_acl(NULL, file, sxp) == 0)
 666                                 iflags |= ITEM_REPORT_ACL;
 667                 }
 668 #endif
 669 #ifdef SUPPORT_XATTRS
 670                 if (preserve_xattrs) {
 671                         if (!XATTR_READY(*sxp))
 672                                 get_xattr(fnamecmp, sxp);
 673                         if (xattr_diff(file, sxp, 1))
 674                                 iflags |= ITEM_REPORT_XATTR;
 675                 }
 676 #endif
 677         } else {
 678 #ifdef SUPPORT_XATTRS
 679                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 680                         iflags |= ITEM_REPORT_XATTR;
 681 #endif
 682                 iflags |= ITEM_IS_NEW;
 683         }
 684
 685         iflags &= 0xffff;
 686         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
 687           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 688                 if (protocol_version >= 29) {
 689                         if (ndx >= 0)
 690                                 write_ndx(sock_f_out, ndx);
 691                         write_shortint(sock_f_out, iflags);
 692                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 693                                 write_byte(sock_f_out, fnamecmp_type);
 694                         if (iflags & ITEM_XNAME_FOLLOWS)
 695                                 write_vstring(sock_f_out, xname, strlen(xname));
 696 #ifdef SUPPORT_XATTRS
 697                         if (iflags & ITEM_REPORT_XATTR && !dry_run)
 698                                 send_xattr_request(NULL, file, sock_f_out);
 699 #endif
 700                 } else if (ndx >= 0) {
 701                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 702                         log_item(code, file, &stats, iflags, xname);
 703                 }
 704         }
 705 }
 706
 707
 708 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 709 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 710 {
 711         if (st->st_size != F_LENGTH(file))
 712                 return 0;
 713
 714         /* if always checksum is set then we use the checksum instead
 715            of the file time to determine whether to sync */
 716         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 717                 char sum[MAX_DIGEST_LEN];
 718                 file_checksum(fn, sum, st->st_size);
 719                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 720         }
 721
 722         if (size_only > 0)
 723                 return 1;
 724
 725         if (ignore_times)
 726                 return 0;
 727
 728         return cmp_time(st->st_mtime, file->modtime) == 0;
 729 }
 730
 731
 732 /*
 733  * set (initialize) the size entries in the per-file sum_struct
 734  * calculating dynamic block and checksum sizes.
 735  *
 736  * This is only called from generate_and_send_sums() but is a separate
 737  * function to encapsulate the logic.
 738  *
 739  * The block size is a rounded square root of file length.
 740  *
 741  * The checksum size is determined according to:
 742  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 743  * provided by Donovan Baarda which gives a probability of rsync
 744  * algorithm corrupting data and falling back using the whole md4
 745  * checksums.
 746  *
 747  * This might be made one of several selectable heuristics.
 748  */
 749 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 750 {
 751         int32 blength;
 752         int s2length;
 753
 754         if (block_size)
 755                 blength = block_size;
 756         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 757                 blength = BLOCK_SIZE;
 758         else {
 759                 int32 c;
 760                 int64 l;
 761                 int cnt;
 762                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 763                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 764                         blength = MAX_BLOCK_SIZE;
 765                 else {
 766                     blength = 0;
 767                     do {
 768                             blength |= c;
 769                             if (len < (int64)blength * blength)
 770                                     blength &= ~c;
 771                             c >>= 1;
 772                     } while (c >= 8);   /* round to multiple of 8 */
 773                     blength = MAX(blength, BLOCK_SIZE);
 774                 }
 775         }
 776
 777         if (protocol_version < 27) {
 778                 s2length = csum_length;
 779         } else if (csum_length == SUM_LENGTH) {
 780                 s2length = SUM_LENGTH;
 781         } else {
 782                 int32 c;
 783                 int64 l;
 784                 int b = BLOCKSUM_BIAS;
 785                 for (l = len; l >>= 1; b += 2) {}
 786                 for (c = blength; (c >>= 1) && b; b--) {}
 787                 /* add a bit, subtract rollsum, round up. */
 788                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 789                 s2length = MAX(s2length, csum_length);
 790                 s2length = MIN(s2length, SUM_LENGTH);
 791         }
 792
 793         sum->flength    = len;
 794         sum->blength    = blength;
 795         sum->s2length   = s2length;
 796         sum->remainder  = (int32)(len % blength);
 797         sum->count      = (int32)(len / blength) + (sum->remainder != 0);
 798
 799         if (sum->count && verbose > 2) {
 800                 rprintf(FINFO,
 801                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 802                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 803                         sum->s2length, (double)sum->flength);
 804         }
 805 }
 806
 807
 808 /*
 809  * Generate and send a stream of signatures/checksums that describe a buffer
 810  *
 811  * Generate approximately one checksum every block_len bytes.
 812  */
 813 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 814 {
 815         int32 i;
 816         struct map_struct *mapbuf;
 817         struct sum_struct sum;
 818         OFF_T offset = 0;
 819
 820         sum_sizes_sqroot(&sum, len);
 821         write_sum_head(f_out, &sum);
 822
 823         if (append_mode > 0 && f_copy < 0)
 824                 return;
 825
 826         if (len > 0)
 827                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 828         else
 829                 mapbuf = NULL;
 830
 831         for (i = 0; i < sum.count; i++) {
 832                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 833                 char *map = map_ptr(mapbuf, offset, n1);
 834                 char sum2[SUM_LENGTH];
 835                 uint32 sum1;
 836
 837                 len -= n1;
 838                 offset += n1;
 839
 840                 if (f_copy >= 0) {
 841                         full_write(f_copy, map, n1);
 842                         if (append_mode > 0)
 843                                 continue;
 844                 }
 845
 846                 sum1 = get_checksum1(map, n1);
 847                 get_checksum2(map, n1, sum2);
 848
 849                 if (verbose > 3) {
 850                         rprintf(FINFO,
 851                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 852                                 (double)i, (double)offset - n1, (long)n1,
 853                                 (unsigned long)sum1);
 854                 }
 855                 write_int(f_out, sum1);
 856                 write_buf(f_out, sum2, sum.s2length);
 857         }
 858
 859         if (mapbuf)
 860                 unmap_file(mapbuf);
 861 }
 862
 863
 864 /* Try to find a filename in the same dir as "fname" with a similar name. */
 865 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 866 {
 867         int fname_len, fname_suf_len;
 868         const char *fname_suf, *fname = file->basename;
 869         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 870         int j, lowest_j = -1;
 871
 872         fname_len = strlen(fname);
 873         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 874
 875         for (j = 0; j < dirlist->used; j++) {
 876                 struct file_struct *fp = dirlist->files[j];
 877                 const char *suf, *name;
 878                 int len, suf_len;
 879                 uint32 dist;
 880
 881                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 882                  || fp->flags & FLAG_FILE_SENT)
 883                         continue;
 884
 885                 name = fp->basename;
 886
 887                 if (F_LENGTH(fp) == F_LENGTH(file)
 888                     && cmp_time(fp->modtime, file->modtime) == 0) {
 889                         if (verbose > 4) {
 890                                 rprintf(FINFO,
 891                                         "fuzzy size/modtime match for %s\n",
 892                                         name);
 893                         }
 894                         return j;
 895                 }
 896
 897                 len = strlen(name);
 898                 suf = find_filename_suffix(name, len, &suf_len);
 899
 900                 dist = fuzzy_distance(name, len, fname, fname_len);
 901                 /* Add some extra weight to how well the suffixes match. */
 902                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 903                       * 10;
 904                 if (verbose > 4) {
 905                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 906                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 907                 }
 908                 if (dist <= lowest_dist) {
 909                         lowest_dist = dist;
 910                         lowest_j = j;
 911                 }
 912         }
 913
 914         return lowest_j;
 915 }
 916
 917 /* Copy a file found in our --copy-dest handling. */
 918 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 919 {
 920         char buf[MAXPATHLEN];
 921         const char *copy_to, *partialptr;
 922         int ok, fd_w;
 923
 924         if (inplace) {
 925                 /* Let copy_file open the destination in place. */
 926                 fd_w = -1;
 927                 copy_to = dest;
 928         } else {
 929                 fd_w = open_tmpfile(buf, dest, file);
 930                 if (fd_w < 0)
 931                         return -1;
 932                 copy_to = buf;
 933         }
 934         cleanup_set(copy_to, NULL, NULL, -1, -1);
 935         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 936                 if (verbose) {
 937                         rsyserr(FINFO, errno, "copy_file %s => %s",
 938                                 full_fname(src), copy_to);
 939                 }
 940                 /* Try to clean up. */
 941                 unlink(copy_to);
 942                 cleanup_disable();
 943                 return -1;
 944         }
 945         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 946         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 947         cleanup_disable();
 948         return ok ? 0 : -1;
 949 }
 950
 951 /* This is only called for regular files.  We return -2 if we've finished
 952  * handling the file, -1 if no dest-linking occurred, or a non-negative
 953  * value if we found an alternate basis file. */
 954 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 955                          char *cmpbuf, stat_x *sxp, int itemizing,
 956                          enum logcode code)
 957 {
 958         int best_match = -1;
 959         int match_level = 0;
 960         int j = 0;
 961
 962         do {
 963                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 964                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 965                         continue;
 966                 switch (match_level) {
 967                 case 0:
 968                         best_match = j;
 969                         match_level = 1;
 970                         /* FALL THROUGH */
 971                 case 1:
 972                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 973                                 continue;
 974                         best_match = j;
 975                         match_level = 2;
 976                         /* FALL THROUGH */
 977                 case 2:
 978                         if (!unchanged_attrs(cmpbuf, file, sxp))
 979                                 continue;
 980                         best_match = j;
 981                         match_level = 3;
 982                         break;
 983                 }
 984                 break;
 985         } while (basis_dir[++j] != NULL);
 986
 987         if (!match_level)
 988                 return -1;
 989
 990         if (j != best_match) {
 991                 j = best_match;
 992                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 993                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 994                         return -1;
 995         }
 996
 997         if (match_level == 3 && !copy_dest) {
 998 #ifdef SUPPORT_HARD_LINKS
 999                 if (link_dest) {
1000                         if (!hard_link_one(file, fname, cmpbuf, 1))
1001                                 goto try_a_copy;
1002                         if (preserve_hard_links && F_IS_HLINKED(file))
1003                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
1004                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
1005                                 itemize(cmpbuf, file, ndx, 1, sxp,
1006                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
1007                                         0, "");
1008                         }
1009                 } else
1010 #endif
1011                 if (itemizing)
1012                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1013                 if (verbose > 1 && maybe_ATTRS_REPORT)
1014                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1015                 return -2;
1016         }
1017
1018         if (match_level >= 2) {
1019 #ifdef SUPPORT_HARD_LINKS
1020           try_a_copy: /* Copy the file locally. */
1021 #endif
1022                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
1023                         return -1;
1024                 if (itemizing)
1025                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1026                 if (maybe_ATTRS_REPORT
1027                  && ((!itemizing && verbose && match_level == 2)
1028                   || (verbose > 1 && match_level == 3))) {
1029                         code = match_level == 3 ? FCLIENT : FINFO;
1030                         rprintf(code, "%s%s\n", fname,
1031                                 match_level == 3 ? " is uptodate" : "");
1032                 }
1033 #ifdef SUPPORT_HARD_LINKS
1034                 if (preserve_hard_links && F_IS_HLINKED(file))
1035                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1036 #endif
1037                 return -2;
1038         }
1039
1040         return FNAMECMP_BASIS_DIR_LOW + j;
1041 }
1042
1043 /* This is only called for non-regular files.  We return -2 if we've finished
1044  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1045  * value if we found an alternate basis file. */
1046 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1047                          char *cmpbuf, stat_x *sxp, int itemizing,
1048                          enum logcode code)
1049 {
1050         char lnk[MAXPATHLEN];
1051         int best_match = -1;
1052         int match_level = 0;
1053         enum nonregtype type;
1054         uint32 *devp;
1055         int len, j = 0;
1056
1057 #ifndef SUPPORT_LINKS
1058         if (S_ISLNK(file->mode))
1059                 return -1;
1060 #endif
1061         if (S_ISDIR(file->mode)) {
1062                 type = TYPE_DIR;
1063         } else if (IS_SPECIAL(file->mode))
1064                 type = TYPE_SPECIAL;
1065         else if (IS_DEVICE(file->mode))
1066                 type = TYPE_DEVICE;
1067 #ifdef SUPPORT_LINKS
1068         else if (S_ISLNK(file->mode))
1069                 type = TYPE_SYMLINK;
1070 #endif
1071         else {
1072                 rprintf(FERROR,
1073                         "internal: try_dests_non() called with invalid mode (%o)\n",
1074                         (int)file->mode);
1075                 exit_cleanup(RERR_UNSUPPORTED);
1076         }
1077
1078         do {
1079                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1080                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1081                         continue;
1082                 switch (type) {
1083                 case TYPE_DIR:
1084                         if (!S_ISDIR(sxp->st.st_mode))
1085                                 continue;
1086                         break;
1087                 case TYPE_SPECIAL:
1088                         if (!IS_SPECIAL(sxp->st.st_mode))
1089                                 continue;
1090                         break;
1091                 case TYPE_DEVICE:
1092                         if (!IS_DEVICE(sxp->st.st_mode))
1093                                 continue;
1094                         break;
1095 #ifdef SUPPORT_LINKS
1096                 case TYPE_SYMLINK:
1097                         if (!S_ISLNK(sxp->st.st_mode))
1098                                 continue;
1099                         break;
1100 #endif
1101                 }
1102                 if (match_level < 1) {
1103                         match_level = 1;
1104                         best_match = j;
1105                 }
1106                 switch (type) {
1107                 case TYPE_DIR:
1108                         break;
1109                 case TYPE_SPECIAL:
1110                 case TYPE_DEVICE:
1111                         devp = F_RDEV_P(file);
1112                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1113                                 continue;
1114                         break;
1115 #ifdef SUPPORT_LINKS
1116                 case TYPE_SYMLINK:
1117                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1118                                 continue;
1119                         lnk[len] = '\0';
1120                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1121                                 continue;
1122                         break;
1123 #endif
1124                 }
1125                 if (match_level < 2) {
1126                         match_level = 2;
1127                         best_match = j;
1128                 }
1129                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1130                         match_level = 3;
1131                         best_match = j;
1132                         break;
1133                 }
1134         } while (basis_dir[++j] != NULL);
1135
1136         if (!match_level)
1137                 return -1;
1138
1139         if (j != best_match) {
1140                 j = best_match;
1141                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1142                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1143                         return -1;
1144         }
1145
1146         if (match_level == 3) {
1147 #ifdef SUPPORT_HARD_LINKS
1148                 if (link_dest
1149 #ifndef CAN_HARDLINK_SYMLINK
1150                  && !S_ISLNK(file->mode)
1151 #endif
1152 #ifndef CAN_HARDLINK_SPECIAL
1153                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1154 #endif
1155                  && !S_ISDIR(file->mode)) {
1156                         if (do_link(cmpbuf, fname) < 0) {
1157                                 rsyserr(FERROR_XFER, errno,
1158                                         "failed to hard-link %s with %s",
1159                                         cmpbuf, fname);
1160                                 return j;
1161                         }
1162                         if (preserve_hard_links && F_IS_HLINKED(file))
1163                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1164                 } else
1165 #endif
1166                         match_level = 2;
1167                 if (itemizing && stdout_format_has_i
1168                  && (verbose > 1 || stdout_format_has_i > 1)) {
1169                         int chg = compare_dest && type != TYPE_DIR ? 0
1170                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1171                         char *lp = match_level == 3 ? "" : NULL;
1172                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1173                 }
1174                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1175                         rprintf(FCLIENT, "%s%s is uptodate\n",
1176                                 fname, type == TYPE_DIR ? "/" : "");
1177                 }
1178                 return -2;
1179         }
1180
1181         return j;
1182 }
1183
1184 static void list_file_entry(struct file_struct *f)
1185 {
1186         char permbuf[PERMSTRING_SIZE];
1187         double len;
1188
1189         if (!F_IS_ACTIVE(f)) {
1190                 /* this can happen if duplicate names were removed */
1191                 return;
1192         }
1193
1194         permstring(permbuf, f->mode);
1195         len = F_LENGTH(f);
1196
1197         /* TODO: indicate '+' if the entry has an ACL. */
1198
1199 #ifdef SUPPORT_LINKS
1200         if (preserve_links && S_ISLNK(f->mode)) {
1201                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1202                         permbuf, len, timestring(f->modtime),
1203                         f_name(f, NULL), F_SYMLINK(f));
1204         } else
1205 #endif
1206         {
1207                 rprintf(FINFO, "%s %11.0f %s %s\n",
1208                         permbuf, len, timestring(f->modtime),
1209                         f_name(f, NULL));
1210         }
1211 }
1212
1213 static int phase = 0;
1214 static int dflt_perms;
1215
1216 static int implied_dirs_are_missing;
1217 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1218 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1219 {
1220         return F_DEPTH(file) > F_DEPTH(subtree)
1221                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1222 }
1223
1224 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1225  * make sure it exists, and has the right permissions/timestamp info.  For
1226  * all other non-regular files (symlinks, etc.) we create them here.  For
1227  * regular files that have changed, we try to find a basis file and then
1228  * start sending checksums.  The ndx is the file's unique index value.
1229  *
1230  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1231  * passed to delete_item(), which can use it during a recursive delete.)
1232  *
1233  * Note that f_out is set to -1 when doing final directory-permission and
1234  * modification-time repair. */
1235 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1236                            int itemizing, enum logcode code, int f_out)
1237 {
1238         static const char *parent_dirname = "";
1239         /* Missing dir not created due to --dry-run; will still be scanned. */
1240         static struct file_struct *dry_missing_dir = NULL;
1241         /* Missing dir whose contents are skipped altogether due to
1242          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1243         static struct file_struct *skip_dir = NULL;
1244         static struct file_list *fuzzy_dirlist = NULL;
1245         static int need_fuzzy_dirlist = 0;
1246         struct file_struct *fuzzy_file = NULL;
1247         int fd = -1, f_copy = -1;
1248         stat_x sx, real_sx;
1249         STRUCT_STAT partial_st;
1250         struct file_struct *back_file = NULL;
1251         int statret, real_ret, stat_errno;
1252         char *fnamecmp, *partialptr, *backupptr = NULL;
1253         char fnamecmpbuf[MAXPATHLEN];
1254         uchar fnamecmp_type;
1255         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1256         int is_dir = !S_ISDIR(file->mode) ? 0
1257                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1258                    : 1;
1259
1260         if (verbose > 2)
1261                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1262
1263         if (list_only) {
1264                 if (is_dir < 0
1265                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1266                         return;
1267                 list_file_entry(file);
1268                 return;
1269         }
1270
1271         if (skip_dir) {
1272                 if (is_below(file, skip_dir)) {
1273                         if (is_dir)
1274                                 file->flags |= FLAG_MISSING_DIR;
1275 #ifdef SUPPORT_HARD_LINKS
1276                         else if (F_IS_HLINKED(file))
1277                                 handle_skipped_hlink(file, itemizing, code, f_out);
1278 #endif
1279                         return;
1280                 }
1281                 skip_dir = NULL;
1282         }
1283
1284         if (server_filter_list.head) {
1285                 if (check_filter(&server_filter_list, fname, is_dir) < 0) {
1286                         if (is_dir < 0)
1287                                 return;
1288 #ifdef SUPPORT_HARD_LINKS
1289                         if (F_IS_HLINKED(file))
1290                                 handle_skipped_hlink(file, itemizing, code, f_out);
1291 #endif
1292                         rprintf(FERROR_XFER,
1293                                 "skipping daemon-excluded %s \"%s\"\n",
1294                                 is_dir ? "directory" : "file", fname);
1295                         if (is_dir)
1296                                 goto skipping_dir_contents;
1297                         return;
1298                 }
1299         }
1300
1301 #ifdef SUPPORT_ACLS
1302         sx.acc_acl = sx.def_acl = NULL;
1303 #endif
1304 #ifdef SUPPORT_XATTRS
1305         sx.xattr = NULL;
1306 #endif
1307         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1308           parent_is_dry_missing:
1309                 if (fuzzy_dirlist) {
1310                         flist_free(fuzzy_dirlist);
1311                         fuzzy_dirlist = NULL;
1312                 }
1313                 parent_dirname = "";
1314                 statret = -1;
1315                 stat_errno = ENOENT;
1316         } else {
1317                 const char *dn = file->dirname ? file->dirname : ".";
1318                 dry_missing_dir = NULL;
1319                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1320                         if (relative_paths && !implied_dirs
1321                          && do_stat(dn, &sx.st) < 0) {
1322                                 if (dry_run)
1323                                         goto parent_is_dry_missing;
1324                                 if (create_directory_path(fname) < 0) {
1325                                         rsyserr(FERROR_XFER, errno,
1326                                                 "recv_generator: mkdir %s failed",
1327                                                 full_fname(dn));
1328                                 }
1329                         }
1330                         if (fuzzy_dirlist) {
1331                                 flist_free(fuzzy_dirlist);
1332                                 fuzzy_dirlist = NULL;
1333                         }
1334                         if (fuzzy_basis)
1335                                 need_fuzzy_dirlist = 1;
1336 #ifdef SUPPORT_ACLS
1337                         if (!preserve_perms)
1338                                 dflt_perms = default_perms_for_dir(dn);
1339 #endif
1340                 }
1341                 parent_dirname = dn;
1342
1343                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1344                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1345                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1346                         need_fuzzy_dirlist = 0;
1347                 }
1348
1349                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1350                 stat_errno = errno;
1351         }
1352
1353         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1354                 if (is_dir) {
1355                         if (is_dir < 0)
1356                                 return;
1357                         skip_dir = file;
1358                         file->flags |= FLAG_MISSING_DIR;
1359                 }
1360 #ifdef SUPPORT_HARD_LINKS
1361                 else if (F_IS_HLINKED(file))
1362                         handle_skipped_hlink(file, itemizing, code, f_out);
1363 #endif
1364                 if (verbose > 1) {
1365                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1366                                 is_dir ? "directory" : "file", fname);
1367                 }
1368                 return;
1369         }
1370
1371         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1372          && !am_root && sx.st.st_uid == our_uid)
1373                 del_opts |= DEL_NO_UID_WRITE;
1374
1375         if (ignore_existing > 0 && statret == 0
1376          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1377                 if (verbose > 1 && is_dir >= 0)
1378                         rprintf(FINFO, "%s exists\n", fname);
1379 #ifdef SUPPORT_HARD_LINKS
1380                 if (F_IS_HLINKED(file))
1381                         handle_skipped_hlink(file, itemizing, code, f_out);
1382 #endif
1383                 goto cleanup;
1384         }
1385
1386         if (is_dir) {
1387                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1388                         goto cleanup;
1389                 if (is_dir < 0) {
1390                         /* In inc_recurse mode we want to make sure any missing
1391                          * directories get created while we're still processing
1392                          * the parent dir (which allows us to touch the parent
1393                          * dir's mtime right away).  We will handle the dir in
1394                          * full later (right before we handle its contents). */
1395                         if (statret == 0
1396                          && (S_ISDIR(sx.st.st_mode)
1397                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1398                                 goto cleanup; /* Any errors get reported later. */
1399                         if (do_mkdir(fname, file->mode & 0700) == 0)
1400                                 file->flags |= FLAG_DIR_CREATED;
1401                         goto cleanup;
1402                 }
1403                 /* The file to be received is a directory, so we need
1404                  * to prepare appropriately.  If there is already a
1405                  * file of that name and it is *not* a directory, then
1406                  * we need to delete it.  If it doesn't exist, then
1407                  * (perhaps recursively) create it. */
1408                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1409                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1410                                 goto skipping_dir_contents;
1411                         statret = -1;
1412                 }
1413                 if (dry_run && statret != 0) {
1414                         if (!dry_missing_dir)
1415                                 dry_missing_dir = file;
1416                         file->flags |= FLAG_MISSING_DIR;
1417                 }
1418                 real_ret = statret;
1419                 real_sx = sx;
1420                 if (file->flags & FLAG_DIR_CREATED)
1421                         statret = -1;
1422                 if (!preserve_perms) { /* See comment in non-dir code below. */
1423                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1424                                                dflt_perms, statret == 0);
1425                 }
1426                 if (statret != 0 && basis_dir[0] != NULL) {
1427                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1428                                               itemizing, code);
1429                         if (j == -2) {
1430                                 itemizing = 0;
1431                                 code = FNONE;
1432                         } else if (j >= 0)
1433                                 statret = 1;
1434                 }
1435                 if (itemizing && f_out != -1) {
1436                         itemize(fname, file, ndx, statret, &sx,
1437                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1438                 }
1439                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1440                         if (!relative_paths || errno != ENOENT
1441                             || create_directory_path(fname) < 0
1442                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1443                                 rsyserr(FERROR_XFER, errno,
1444                                         "recv_generator: mkdir %s failed",
1445                                         full_fname(fname));
1446                           skipping_dir_contents:
1447                                 rprintf(FERROR,
1448                                     "*** Skipping any contents from this failed directory ***\n");
1449                                 skip_dir = file;
1450                                 file->flags |= FLAG_MISSING_DIR;
1451                                 goto cleanup;
1452                         }
1453                 }
1454                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1455                     && verbose && code != FNONE && f_out != -1)
1456                         rprintf(code, "%s/\n", fname);
1457
1458                 /* We need to ensure that the dirs in the transfer have writable
1459                  * permissions during the time we are putting files within them.
1460                  * This is then fixed after the transfer is done. */
1461 #ifdef HAVE_CHMOD
1462                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1463                         mode_t mode = file->mode | S_IWUSR;
1464                         if (do_chmod(fname, mode) < 0) {
1465                                 rsyserr(FERROR_XFER, errno,
1466                                         "failed to modify permissions on %s",
1467                                         full_fname(fname));
1468                         }
1469                         need_retouch_dir_perms = 1;
1470                 }
1471 #endif
1472
1473                 if (real_ret != 0 && one_file_system)
1474                         real_sx.st.st_dev = filesystem_dev;
1475                 if (inc_recurse) {
1476                         if (one_file_system) {
1477                                 uint32 *devp = F_DIR_DEV_P(file);
1478                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1479                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1480                         }
1481                 }
1482                 else if (delete_during && f_out != -1 && !phase
1483                     && BITS_SETnUNSET(file->flags, FLAG_CONTENT_DIR, FLAG_MISSING_DIR))
1484                         delete_in_dir(fname, file, &real_sx.st.st_dev);
1485                 goto cleanup;
1486         }
1487
1488         /* If we're not preserving permissions, change the file-list's
1489          * mode based on the local permissions and some heuristics. */
1490         if (!preserve_perms) {
1491                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1492                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1493                                        exists);
1494         }
1495
1496 #ifdef SUPPORT_HARD_LINKS
1497         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1498          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1499                 goto cleanup;
1500 #endif
1501
1502         if (preserve_links && S_ISLNK(file->mode)) {
1503 #ifdef SUPPORT_LINKS
1504                 const char *sl = F_SYMLINK(file);
1505                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1506                         if (verbose) {
1507                                 if (solo_file)
1508                                         fname = f_name(file, NULL);
1509                                 rprintf(FINFO,
1510                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1511                                         full_fname(fname), sl);
1512                         }
1513                         return;
1514                 }
1515                 if (statret == 0) {
1516                         char lnk[MAXPATHLEN];
1517                         int len;
1518
1519                         if (!S_ISLNK(sx.st.st_mode))
1520                                 statret = -1;
1521                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1522                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1523                                 /* The link is pointing to the right place. */
1524                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1525                                 if (itemizing)
1526                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1527 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1528                                 if (preserve_hard_links && F_IS_HLINKED(file))
1529                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1530 #endif
1531                                 if (remove_source_files == 1)
1532                                         goto return_with_success;
1533                                 goto cleanup;
1534                         }
1535                         /* Not the right symlink (or not a symlink), so
1536                          * delete it. */
1537                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1538                                 goto cleanup;
1539                 } else if (basis_dir[0] != NULL) {
1540                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1541                                               itemizing, code);
1542                         if (j == -2) {
1543 #ifndef CAN_HARDLINK_SYMLINK
1544                                 if (link_dest) {
1545                                         /* Resort to --copy-dest behavior. */
1546                                 } else
1547 #endif
1548                                 if (!copy_dest)
1549                                         goto cleanup;
1550                                 itemizing = 0;
1551                                 code = FNONE;
1552                         } else if (j >= 0)
1553                                 statret = 1;
1554                 }
1555 #ifdef SUPPORT_HARD_LINKS
1556                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1557                         cur_flist->in_progress++;
1558                         goto cleanup;
1559                 }
1560 #endif
1561                 if (do_symlink(sl, fname) != 0) {
1562                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1563                                 full_fname(fname), sl);
1564                 } else {
1565                         set_file_attrs(fname, file, NULL, NULL, 0);
1566                         if (itemizing) {
1567                                 itemize(fname, file, ndx, statret, &sx,
1568                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1569                         }
1570                         if (code != FNONE && verbose)
1571                                 rprintf(code, "%s -> %s\n", fname, sl);
1572 #ifdef SUPPORT_HARD_LINKS
1573                         if (preserve_hard_links && F_IS_HLINKED(file))
1574                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1575 #endif
1576                         /* This does not check remove_source_files == 1
1577                          * because this is one of the items that the old
1578                          * --remove-sent-files option would remove. */
1579                         if (remove_source_files)
1580                                 goto return_with_success;
1581                 }
1582 #endif
1583                 goto cleanup;
1584         }
1585
1586         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1587          || (preserve_specials && IS_SPECIAL(file->mode))) {
1588                 uint32 *devp = F_RDEV_P(file);
1589                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1590                 if (statret == 0) {
1591                         int del_for_flag;
1592                         if (IS_DEVICE(file->mode)) {
1593                                 if (!IS_DEVICE(sx.st.st_mode))
1594                                         statret = -1;
1595                                 del_for_flag = DEL_FOR_DEVICE;
1596                         } else {
1597                                 if (!IS_SPECIAL(sx.st.st_mode))
1598                                         statret = -1;
1599                                 del_for_flag = DEL_FOR_SPECIAL;
1600                         }
1601                         if (statret == 0
1602                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1603                          && sx.st.st_rdev == rdev) {
1604                                 /* The device or special file is identical. */
1605                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1606                                 if (itemizing)
1607                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1608 #ifdef SUPPORT_HARD_LINKS
1609                                 if (preserve_hard_links && F_IS_HLINKED(file))
1610                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1611 #endif
1612                                 if (remove_source_files == 1)
1613                                         goto return_with_success;
1614                                 goto cleanup;
1615                         }
1616                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1617                                 goto cleanup;
1618                 } else if (basis_dir[0] != NULL) {
1619                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1620                                               itemizing, code);
1621                         if (j == -2) {
1622 #ifndef CAN_HARDLINK_SPECIAL
1623                                 if (link_dest) {
1624                                         /* Resort to --copy-dest behavior. */
1625                                 } else
1626 #endif
1627                                 if (!copy_dest)
1628                                         goto cleanup;
1629                                 itemizing = 0;
1630                                 code = FNONE;
1631                         } else if (j >= 0)
1632                                 statret = 1;
1633                 }
1634 #ifdef SUPPORT_HARD_LINKS
1635                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1636                         cur_flist->in_progress++;
1637                         goto cleanup;
1638                 }
1639 #endif
1640                 if (verbose > 2) {
1641                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1642                                 fname, (int)file->mode,
1643                                 (long)major(rdev), (long)minor(rdev));
1644                 }
1645                 if (do_mknod(fname, file->mode, rdev) < 0) {
1646                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1647                                 full_fname(fname));
1648                 } else {
1649                         set_file_attrs(fname, file, NULL, NULL, 0);
1650                         if (itemizing) {
1651                                 itemize(fname, file, ndx, statret, &sx,
1652                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1653                         }
1654                         if (code != FNONE && verbose)
1655                                 rprintf(code, "%s\n", fname);
1656 #ifdef SUPPORT_HARD_LINKS
1657                         if (preserve_hard_links && F_IS_HLINKED(file))
1658                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1659 #endif
1660                         if (remove_source_files == 1)
1661                                 goto return_with_success;
1662                 }
1663                 goto cleanup;
1664         }
1665
1666         if (!S_ISREG(file->mode)) {
1667                 if (solo_file)
1668                         fname = f_name(file, NULL);
1669                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1670                 goto cleanup;
1671         }
1672
1673         if (max_size > 0 && F_LENGTH(file) > max_size) {
1674                 if (verbose > 1) {
1675                         if (solo_file)
1676                                 fname = f_name(file, NULL);
1677                         rprintf(FINFO, "%s is over max-size\n", fname);
1678                 }
1679                 goto cleanup;
1680         }
1681         if (min_size > 0 && F_LENGTH(file) < min_size) {
1682                 if (verbose > 1) {
1683                         if (solo_file)
1684                                 fname = f_name(file, NULL);
1685                         rprintf(FINFO, "%s is under min-size\n", fname);
1686                 }
1687                 goto cleanup;
1688         }
1689
1690         if (update_only > 0 && statret == 0
1691             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1692                 if (verbose > 1)
1693                         rprintf(FINFO, "%s is newer\n", fname);
1694 #ifdef SUPPORT_HARD_LINKS
1695                 if (F_IS_HLINKED(file))
1696                         handle_skipped_hlink(file, itemizing, code, f_out);
1697 #endif
1698                 goto cleanup;
1699         }
1700
1701         fnamecmp = fname;
1702         fnamecmp_type = FNAMECMP_FNAME;
1703
1704         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1705                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1706                         goto cleanup;
1707                 statret = -1;
1708                 stat_errno = ENOENT;
1709         }
1710
1711         if (statret != 0 && basis_dir[0] != NULL) {
1712                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1713                                       itemizing, code);
1714                 if (j == -2) {
1715                         if (remove_source_files == 1)
1716                                 goto return_with_success;
1717                         goto cleanup;
1718                 }
1719                 if (j >= 0) {
1720                         fnamecmp = fnamecmpbuf;
1721                         fnamecmp_type = j;
1722                         statret = 0;
1723                 }
1724         }
1725
1726         real_ret = statret;
1727         real_sx = sx;
1728
1729         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1730             && link_stat(partialptr, &partial_st, 0) == 0
1731             && S_ISREG(partial_st.st_mode)) {
1732                 if (statret != 0)
1733                         goto prepare_to_open;
1734         } else
1735                 partialptr = NULL;
1736
1737         if (statret != 0 && fuzzy_dirlist) {
1738                 int j = find_fuzzy(file, fuzzy_dirlist);
1739                 if (j >= 0) {
1740                         fuzzy_file = fuzzy_dirlist->files[j];
1741                         f_name(fuzzy_file, fnamecmpbuf);
1742                         if (verbose > 2) {
1743                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1744                                         fname, fnamecmpbuf);
1745                         }
1746                         sx.st.st_size = F_LENGTH(fuzzy_file);
1747                         statret = 0;
1748                         fnamecmp = fnamecmpbuf;
1749                         fnamecmp_type = FNAMECMP_FUZZY;
1750                 }
1751         }
1752
1753         if (statret != 0) {
1754 #ifdef SUPPORT_HARD_LINKS
1755                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1756                         cur_flist->in_progress++;
1757                         goto cleanup;
1758                 }
1759 #endif
1760                 if (stat_errno == ENOENT)
1761                         goto notify_others;
1762                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1763                         full_fname(fname));
1764                 goto cleanup;
1765         }
1766
1767         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1768                 ;
1769         else if (fnamecmp_type == FNAMECMP_FUZZY)
1770                 ;
1771         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1772                 if (partialptr) {
1773                         do_unlink(partialptr);
1774                         handle_partial_dir(partialptr, PDIR_DELETE);
1775                 }
1776                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1777                 if (itemizing)
1778                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1779 #ifdef SUPPORT_HARD_LINKS
1780                 if (preserve_hard_links && F_IS_HLINKED(file))
1781                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1782 #endif
1783                 if (remove_source_files != 1)
1784                         goto cleanup;
1785           return_with_success:
1786                 if (!dry_run)
1787                         send_msg_int(MSG_SUCCESS, ndx);
1788                 goto cleanup;
1789         }
1790
1791         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1792 #ifdef SUPPORT_HARD_LINKS
1793                 if (F_IS_HLINKED(file))
1794                         handle_skipped_hlink(file, itemizing, code, f_out);
1795 #endif
1796                 goto cleanup;
1797         }
1798
1799   prepare_to_open:
1800         if (partialptr) {
1801                 sx.st = partial_st;
1802                 fnamecmp = partialptr;
1803                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1804                 statret = 0;
1805         }
1806
1807         if (!do_xfers)
1808                 goto notify_others;
1809
1810         if (read_batch || whole_file) {
1811                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1812                         if (!(backupptr = get_backup_name(fname)))
1813                                 goto cleanup;
1814                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1815                                 goto pretend_missing;
1816                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1817                                 unmake_file(back_file);
1818                                 back_file = NULL;
1819                                 goto cleanup;
1820                         }
1821                 }
1822                 goto notify_others;
1823         }
1824
1825         if (fuzzy_dirlist) {
1826                 int j = flist_find(fuzzy_dirlist, file);
1827                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1828                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1829         }
1830
1831         /* open the file */
1832         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1833                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1834                         full_fname(fnamecmp));
1835           pretend_missing:
1836                 /* pretend the file didn't exist */
1837 #ifdef SUPPORT_HARD_LINKS
1838                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1839                         cur_flist->in_progress++;
1840                         goto cleanup;
1841                 }
1842 #endif
1843                 statret = real_ret = -1;
1844                 goto notify_others;
1845         }
1846
1847         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1848                 if (!(backupptr = get_backup_name(fname))) {
1849                         close(fd);
1850                         goto cleanup;
1851                 }
1852                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1853                         close(fd);
1854                         goto pretend_missing;
1855                 }
1856                 if (robust_unlink(backupptr) && errno != ENOENT) {
1857                         rsyserr(FERROR_XFER, errno, "unlink %s",
1858                                 full_fname(backupptr));
1859                         unmake_file(back_file);
1860                         back_file = NULL;
1861                         close(fd);
1862                         goto cleanup;
1863                 }
1864                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0
1865                  && (errno != ENOENT || make_bak_dir(backupptr) < 0
1866                   || (f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)) {
1867                         rsyserr(FERROR_XFER, errno, "open %s",
1868                                 full_fname(backupptr));
1869                         unmake_file(back_file);
1870                         back_file = NULL;
1871                         close(fd);
1872                         goto cleanup;
1873                 }
1874                 fnamecmp_type = FNAMECMP_BACKUP;
1875         }
1876
1877         if (verbose > 3) {
1878                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1879                         fnamecmp, (double)sx.st.st_size);
1880         }
1881
1882         if (verbose > 2)
1883                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1884
1885   notify_others:
1886         if (remove_source_files && !delay_updates && !phase && !dry_run)
1887                 increment_active_files(ndx, itemizing, code);
1888         if (inc_recurse && !dry_run)
1889                 cur_flist->in_progress++;
1890 #ifdef SUPPORT_HARD_LINKS
1891         if (preserve_hard_links && F_IS_HLINKED(file))
1892                 file->flags |= FLAG_FILE_SENT;
1893 #endif
1894         write_ndx(f_out, ndx);
1895         if (itemizing) {
1896                 int iflags = ITEM_TRANSFER;
1897                 if (always_checksum > 0)
1898                         iflags |= ITEM_REPORT_CHANGE;
1899                 if (fnamecmp_type != FNAMECMP_FNAME)
1900                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1901                 if (fnamecmp_type == FNAMECMP_FUZZY)
1902                         iflags |= ITEM_XNAME_FOLLOWS;
1903                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1904                         fuzzy_file ? fuzzy_file->basename : NULL);
1905 #ifdef SUPPORT_ACLS
1906                 if (preserve_acls)
1907                         free_acl(&real_sx);
1908 #endif
1909 #ifdef SUPPORT_XATTRS
1910                 if (preserve_xattrs)
1911                         free_xattr(&real_sx);
1912 #endif
1913         }
1914
1915         if (!do_xfers) {
1916 #ifdef SUPPORT_HARD_LINKS
1917                 if (preserve_hard_links && F_IS_HLINKED(file))
1918                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1919 #endif
1920                 goto cleanup;
1921         }
1922         if (read_batch)
1923                 goto cleanup;
1924
1925         if (statret != 0 || whole_file)
1926                 write_sum_head(f_out, NULL);
1927         else {
1928                 generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy);
1929                 close(fd);
1930         }
1931
1932   cleanup:
1933         if (back_file) {
1934                 if (f_copy >= 0)
1935                         close(f_copy);
1936                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1937                 if (verbose > 1) {
1938                         rprintf(FINFO, "backed up %s to %s\n",
1939                                 fname, backupptr);
1940                 }
1941                 unmake_file(back_file);
1942         }
1943
1944 #ifdef SUPPORT_ACLS
1945         if (preserve_acls)
1946                 free_acl(&sx);
1947 #endif
1948 #ifdef SUPPORT_XATTRS
1949         if (preserve_xattrs)
1950                 free_xattr(&sx);
1951 #endif
1952         return;
1953 }
1954
1955 #ifdef SUPPORT_HARD_LINKS
1956 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1957                                  enum logcode code, int f_out)
1958 {
1959         char fbuf[MAXPATHLEN];
1960         int new_last_ndx;
1961         struct file_list *save_flist = cur_flist;
1962
1963         /* If we skip the last item in a chain of links and there was a
1964          * prior non-skipped hard-link waiting to finish, finish it now. */
1965         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1966                 return;
1967
1968         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1969         cur_flist->in_progress--; /* undo prior increment */
1970         f_name(file, fbuf);
1971         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1972
1973         cur_flist = save_flist;
1974 }
1975 #endif
1976
1977 static void touch_up_dirs(struct file_list *flist, int ndx)
1978 {
1979         static int counter = 0;
1980         struct file_struct *file;
1981         char *fname;
1982         int i, start, end;
1983
1984         if (ndx < 0) {
1985                 start = 0;
1986                 end = flist->used - 1;
1987         } else
1988                 start = end = ndx;
1989
1990         /* Fix any directory permissions that were modified during the
1991          * transfer and/or re-set any tweaked modified-time values. */
1992         for (i = start; i <= end; i++, counter++) {
1993                 file = flist->files[i];
1994                 if (!S_ISDIR(file->mode)
1995                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1996                         continue;
1997                 if (verbose > 3) {
1998                         fname = f_name(file, NULL);
1999                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2000                                 NS(fname), i);
2001                 }
2002                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2003                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
2004                         continue;
2005                 fname = f_name(file, NULL);
2006                 if (!(file->mode & S_IWUSR))
2007                         do_chmod(fname, file->mode);
2008                 if (need_retouch_dir_times) {
2009                         STRUCT_STAT st;
2010                         if (link_stat(fname, &st, 0) == 0
2011                          && cmp_time(st.st_mtime, file->modtime) != 0)
2012                                 set_modtime(fname, file->modtime, file->mode);
2013                 }
2014                 if (allowed_lull && !(counter % lull_mod))
2015                         maybe_send_keepalive();
2016                 else if (!(counter & 0xFF))
2017                         maybe_flush_socket(0);
2018         }
2019 }
2020
2021 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2022 {
2023         struct file_struct *file;
2024         struct file_list *flist;
2025         char fbuf[MAXPATHLEN];
2026         int ndx;
2027
2028         while (1) {
2029 #ifdef SUPPORT_HARD_LINKS
2030                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2031                         flist = flist_for_ndx(ndx);
2032                         assert(flist != NULL);
2033                         file = flist->files[ndx - flist->ndx_start];
2034                         assert(file->flags & FLAG_HLINKED);
2035                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2036                         flist->in_progress--;
2037                         continue;
2038                 }
2039 #endif
2040
2041                 if (check_redo && (ndx = get_redo_num()) != -1) {
2042                         csum_length = SUM_LENGTH;
2043                         max_size = -max_size;
2044                         min_size = -min_size;
2045                         ignore_existing = -ignore_existing;
2046                         ignore_non_existing = -ignore_non_existing;
2047                         update_only = -update_only;
2048                         always_checksum = -always_checksum;
2049                         size_only = -size_only;
2050                         append_mode = -append_mode;
2051                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2052                         ignore_times++;
2053
2054                         flist = cur_flist;
2055                         cur_flist = flist_for_ndx(ndx);
2056
2057                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2058                         if (solo_file)
2059                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2060                         else
2061                                 f_name(file, fbuf);
2062                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2063                         cur_flist->to_redo--;
2064
2065                         cur_flist = flist;
2066
2067                         csum_length = SHORT_SUM_LENGTH;
2068                         max_size = -max_size;
2069                         min_size = -min_size;
2070                         ignore_existing = -ignore_existing;
2071                         ignore_non_existing = -ignore_non_existing;
2072                         update_only = -update_only;
2073                         always_checksum = -always_checksum;
2074                         size_only = -size_only;
2075                         append_mode = -append_mode;
2076                         make_backups = -make_backups;
2077                         ignore_times--;
2078                         continue;
2079                 }
2080
2081                 if (cur_flist == first_flist)
2082                         break;
2083
2084                 /* We only get here if inc_recurse is enabled. */
2085                 if (first_flist->in_progress || first_flist->to_redo)
2086                         break;
2087
2088                 if (!read_batch) {
2089                         write_ndx(sock_f_out, NDX_DONE);
2090                         maybe_flush_socket(1);
2091                 }
2092
2093                 if (delete_during == 2 || !dir_tweaking) {
2094                         /* Skip directory touch-up. */
2095                 } else if (first_flist->parent_ndx >= 0)
2096                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2097
2098                 flist_free(first_flist); /* updates first_flist */
2099         }
2100 }
2101
2102 void generate_files(int f_out, const char *local_name)
2103 {
2104         int i, ndx;
2105         char fbuf[MAXPATHLEN];
2106         int itemizing;
2107         enum logcode code;
2108         int save_do_progress = do_progress;
2109
2110         if (protocol_version >= 29) {
2111                 itemizing = 1;
2112                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2113                 code = logfile_format_has_i ? FNONE : FLOG;
2114         } else if (am_daemon) {
2115                 itemizing = logfile_format_has_i && do_xfers;
2116                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2117                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2118         } else if (!am_server) {
2119                 itemizing = stdout_format_has_i;
2120                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2121                 code = itemizing ? FNONE : FINFO;
2122         } else {
2123                 itemizing = 0;
2124                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2125                 code = FINFO;
2126         }
2127         solo_file = local_name;
2128         dir_tweaking = !(list_only || solo_file || dry_run);
2129         need_retouch_dir_times = preserve_times > 1;
2130         lull_mod = allowed_lull * 5;
2131         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2132             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2133         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2134
2135         if (verbose > 2)
2136                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2137
2138         if (delete_before && !solo_file && cur_flist->used > 0)
2139                 do_delete_pass();
2140         if (delete_during == 2) {
2141                 deldelay_size = BIGPATHBUFLEN * 4;
2142                 deldelay_buf = new_array(char, deldelay_size);
2143                 if (!deldelay_buf)
2144                         out_of_memory("delete-delay");
2145         }
2146         do_progress = 0;
2147
2148         if (append_mode > 0 || whole_file < 0)
2149                 whole_file = 0;
2150         if (verbose >= 2) {
2151                 rprintf(FINFO, "delta-transmission %s\n",
2152                         whole_file
2153                         ? "disabled for local transfer or --whole-file"
2154                         : "enabled");
2155         }
2156
2157         /* Since we often fill up the outgoing socket and then just sit around
2158          * waiting for the other 2 processes to do their thing, we don't want
2159          * to exit on a timeout.  If the data stops flowing, the receiver will
2160          * notice that and let us know via the redo pipe (or its closing). */
2161         ignore_timeout = 1;
2162
2163         dflt_perms = (ACCESSPERMS & ~orig_umask);
2164
2165         do {
2166 #ifdef SUPPORT_HARD_LINKS
2167                 if (preserve_hard_links && inc_recurse) {
2168                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2169                                 wait_for_receiver();
2170                 }
2171 #endif
2172
2173                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2174                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2175                         f_name(fp, fbuf);
2176                         ndx = cur_flist->ndx_start - 1;
2177                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2178                         if (delete_during && dry_run < 2 && !list_only) {
2179                                 if (BITS_SETnUNSET(fp->flags, FLAG_CONTENT_DIR, FLAG_MISSING_DIR)) {
2180                                         dev_t dirdev;
2181                                         if (one_file_system) {
2182                                                 uint32 *devp = F_DIR_DEV_P(fp);
2183                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2184                                         } else
2185                                                 dirdev = MAKEDEV(0, 0);
2186                                         delete_in_dir(f_name(fp, fbuf), fp, &dirdev);
2187                                 }
2188                         }
2189                 }
2190                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2191                         struct file_struct *file = cur_flist->sorted[i];
2192
2193                         if (!F_IS_ACTIVE(file))
2194                                 continue;
2195
2196                         if (unsort_ndx)
2197                                 ndx = F_NDX(file);
2198                         else
2199                                 ndx = i + cur_flist->ndx_start;
2200
2201                         if (solo_file)
2202                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2203                         else
2204                                 f_name(file, fbuf);
2205                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2206
2207                         check_for_finished_files(itemizing, code, 0);
2208
2209                         if (allowed_lull && !(i % lull_mod))
2210                                 maybe_send_keepalive();
2211                         else if (!(i & 0xFF))
2212                                 maybe_flush_socket(0);
2213                 }
2214
2215                 if (!inc_recurse) {
2216                         write_ndx(f_out, NDX_DONE);
2217                         break;
2218                 }
2219
2220                 while (1) {
2221                         check_for_finished_files(itemizing, code, 1);
2222                         if (cur_flist->next || flist_eof)
2223                                 break;
2224                         wait_for_receiver();
2225                 }
2226         } while ((cur_flist = cur_flist->next) != NULL);
2227
2228         if (delete_during)
2229                 delete_in_dir(NULL, NULL, &dev_zero);
2230         phase++;
2231         if (verbose > 2)
2232                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2233
2234         while (1) {
2235                 check_for_finished_files(itemizing, code, 1);
2236                 if (msgdone_cnt)
2237                         break;
2238                 wait_for_receiver();
2239         }
2240
2241         phase++;
2242         if (verbose > 2)
2243                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2244
2245         write_ndx(f_out, NDX_DONE);
2246         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2247         if (protocol_version >= 29 && !delay_updates)
2248                 write_ndx(f_out, NDX_DONE);
2249
2250         /* Read MSG_DONE for the redo phase (and any prior messages). */
2251         while (1) {
2252                 check_for_finished_files(itemizing, code, 0);
2253                 if (msgdone_cnt > 1)
2254                         break;
2255                 wait_for_receiver();
2256         }
2257
2258         if (protocol_version >= 29) {
2259                 phase++;
2260                 if (verbose > 2)
2261                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2262                 if (delay_updates)
2263                         write_ndx(f_out, NDX_DONE);
2264                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2265                 while (msgdone_cnt == 2)
2266                         wait_for_receiver();
2267         }
2268
2269         do_progress = save_do_progress;
2270         if (delete_during == 2)
2271                 do_delayed_deletions(fbuf);
2272         if (delete_after && !solo_file && file_total > 0)
2273                 do_delete_pass();
2274
2275         if ((need_retouch_dir_perms || need_retouch_dir_times)
2276          && dir_tweaking && (!inc_recurse || delete_during == 2))
2277                 touch_up_dirs(dir_flist, -1);
2278
2279         if (max_delete >= 0 && deletion_count > max_delete) {
2280                 rprintf(FINFO,
2281                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2282                         deletion_count - max_delete);
2283                 io_error |= IOERR_DEL_LIMIT;
2284         }
2285
2286         if (verbose > 2)
2287                 rprintf(FINFO, "generate_files finished\n");
2288 }