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 daemon_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                 f_name(file, fbuf);
 561
 562                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 563                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 564                         continue;
 565                 }
 566
 567                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 568                         rprintf(FINFO, "deleting in %s\n", fbuf);
 569
 570                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 571                  || !S_ISDIR(st.st_mode))
 572                         continue;
 573
 574                 delete_in_dir(fbuf, file, &st.st_dev);
 575         }
 576         delete_in_dir(NULL, NULL, &dev_zero);
 577
 578         if (do_progress && !am_server)
 579                 rprintf(FINFO, "                    \r");
 580 }
 581
 582 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 583 {
 584 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
 585         if (S_ISLNK(file->mode)) {
 586                 ;
 587         } else
 588 #endif
 589         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 590                 return 0;
 591
 592         if (preserve_perms) {
 593                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 594                         return 0;
 595         } else if (preserve_executability
 596          && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 597                 return 0;
 598
 599         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 600                 return 0;
 601
 602         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 603                 return 0;
 604
 605 #ifdef SUPPORT_ACLS
 606         if (preserve_acls && !S_ISLNK(file->mode)) {
 607                 if (!ACL_READY(*sxp))
 608                         get_acl(fname, sxp);
 609                 if (set_acl(NULL, file, sxp) == 0)
 610                         return 0;
 611         }
 612 #endif
 613 #ifdef SUPPORT_XATTRS
 614         if (preserve_xattrs) {
 615                 if (!XATTR_READY(*sxp))
 616                         get_xattr(fname, sxp);
 617                 if (xattr_diff(file, sxp, 0))
 618                         return 0;
 619         }
 620 #endif
 621
 622         return 1;
 623 }
 624
 625 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 626              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 627              const char *xname)
 628 {
 629         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 630                 int keep_time = !preserve_times ? 0
 631                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 632 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 633                     1;
 634 #else
 635                     !S_ISLNK(file->mode);
 636 #endif
 637
 638                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 639                         iflags |= ITEM_REPORT_SIZE;
 640                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 641                         if (iflags & ITEM_LOCAL_CHANGE)
 642                                 iflags |= symlink_timeset_failed_flags;
 643                 } else if (keep_time
 644                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 645                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 646                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 647                         iflags |= ITEM_REPORT_TIME;
 648 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 649                 if (S_ISLNK(file->mode)) {
 650                         ;
 651                 } else
 652 #endif
 653                 if (preserve_perms) {
 654                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 655                                 iflags |= ITEM_REPORT_PERMS;
 656                 } else if (preserve_executability
 657                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 658                         iflags |= ITEM_REPORT_PERMS;
 659                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 660                         iflags |= ITEM_REPORT_OWNER;
 661                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 662                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 663                         iflags |= ITEM_REPORT_GROUP;
 664 #ifdef SUPPORT_ACLS
 665                 if (preserve_acls && !S_ISLNK(file->mode)) {
 666                         if (!ACL_READY(*sxp))
 667                                 get_acl(fnamecmp, sxp);
 668                         if (set_acl(NULL, file, sxp) == 0)
 669                                 iflags |= ITEM_REPORT_ACL;
 670                 }
 671 #endif
 672 #ifdef SUPPORT_XATTRS
 673                 if (preserve_xattrs) {
 674                         if (!XATTR_READY(*sxp))
 675                                 get_xattr(fnamecmp, sxp);
 676                         if (xattr_diff(file, sxp, 1))
 677                                 iflags |= ITEM_REPORT_XATTR;
 678                 }
 679 #endif
 680         } else {
 681 #ifdef SUPPORT_XATTRS
 682                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 683                         iflags |= ITEM_REPORT_XATTR;
 684 #endif
 685                 iflags |= ITEM_IS_NEW;
 686         }
 687
 688         iflags &= 0xffff;
 689         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
 690           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 691                 if (protocol_version >= 29) {
 692                         if (ndx >= 0)
 693                                 write_ndx(sock_f_out, ndx);
 694                         write_shortint(sock_f_out, iflags);
 695                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 696                                 write_byte(sock_f_out, fnamecmp_type);
 697                         if (iflags & ITEM_XNAME_FOLLOWS)
 698                                 write_vstring(sock_f_out, xname, strlen(xname));
 699 #ifdef SUPPORT_XATTRS
 700                         if (iflags & ITEM_REPORT_XATTR && !dry_run)
 701                                 send_xattr_request(NULL, file, sock_f_out);
 702 #endif
 703                 } else if (ndx >= 0) {
 704                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 705                         log_item(code, file, &stats, iflags, xname);
 706                 }
 707         }
 708 }
 709
 710
 711 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 712 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 713 {
 714         if (st->st_size != F_LENGTH(file))
 715                 return 0;
 716
 717         /* if always checksum is set then we use the checksum instead
 718            of the file time to determine whether to sync */
 719         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 720                 char sum[MAX_DIGEST_LEN];
 721                 file_checksum(fn, sum, st->st_size);
 722                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 723         }
 724
 725         if (size_only > 0)
 726                 return 1;
 727
 728         if (ignore_times)
 729                 return 0;
 730
 731         return cmp_time(st->st_mtime, file->modtime) == 0;
 732 }
 733
 734
 735 /*
 736  * set (initialize) the size entries in the per-file sum_struct
 737  * calculating dynamic block and checksum sizes.
 738  *
 739  * This is only called from generate_and_send_sums() but is a separate
 740  * function to encapsulate the logic.
 741  *
 742  * The block size is a rounded square root of file length.
 743  *
 744  * The checksum size is determined according to:
 745  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 746  * provided by Donovan Baarda which gives a probability of rsync
 747  * algorithm corrupting data and falling back using the whole md4
 748  * checksums.
 749  *
 750  * This might be made one of several selectable heuristics.
 751  */
 752 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 753 {
 754         int32 blength;
 755         int s2length;
 756
 757         if (block_size)
 758                 blength = block_size;
 759         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 760                 blength = BLOCK_SIZE;
 761         else {
 762                 int32 c;
 763                 int64 l;
 764                 int cnt;
 765                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 766                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 767                         blength = MAX_BLOCK_SIZE;
 768                 else {
 769                     blength = 0;
 770                     do {
 771                             blength |= c;
 772                             if (len < (int64)blength * blength)
 773                                     blength &= ~c;
 774                             c >>= 1;
 775                     } while (c >= 8);   /* round to multiple of 8 */
 776                     blength = MAX(blength, BLOCK_SIZE);
 777                 }
 778         }
 779
 780         if (protocol_version < 27) {
 781                 s2length = csum_length;
 782         } else if (csum_length == SUM_LENGTH) {
 783                 s2length = SUM_LENGTH;
 784         } else {
 785                 int32 c;
 786                 int64 l;
 787                 int b = BLOCKSUM_BIAS;
 788                 for (l = len; l >>= 1; b += 2) {}
 789                 for (c = blength; (c >>= 1) && b; b--) {}
 790                 /* add a bit, subtract rollsum, round up. */
 791                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 792                 s2length = MAX(s2length, csum_length);
 793                 s2length = MIN(s2length, SUM_LENGTH);
 794         }
 795
 796         sum->flength    = len;
 797         sum->blength    = blength;
 798         sum->s2length   = s2length;
 799         sum->remainder  = (int32)(len % blength);
 800         sum->count      = (int32)(len / blength) + (sum->remainder != 0);
 801
 802         if (sum->count && verbose > 2) {
 803                 rprintf(FINFO,
 804                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 805                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 806                         sum->s2length, (double)sum->flength);
 807         }
 808 }
 809
 810
 811 /*
 812  * Generate and send a stream of signatures/checksums that describe a buffer
 813  *
 814  * Generate approximately one checksum every block_len bytes.
 815  */
 816 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 817 {
 818         int32 i;
 819         struct map_struct *mapbuf;
 820         struct sum_struct sum;
 821         OFF_T offset = 0;
 822
 823         sum_sizes_sqroot(&sum, len);
 824         write_sum_head(f_out, &sum);
 825
 826         if (append_mode > 0 && f_copy < 0)
 827                 return;
 828
 829         if (len > 0)
 830                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 831         else
 832                 mapbuf = NULL;
 833
 834         for (i = 0; i < sum.count; i++) {
 835                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 836                 char *map = map_ptr(mapbuf, offset, n1);
 837                 char sum2[SUM_LENGTH];
 838                 uint32 sum1;
 839
 840                 len -= n1;
 841                 offset += n1;
 842
 843                 if (f_copy >= 0) {
 844                         full_write(f_copy, map, n1);
 845                         if (append_mode > 0)
 846                                 continue;
 847                 }
 848
 849                 sum1 = get_checksum1(map, n1);
 850                 get_checksum2(map, n1, sum2);
 851
 852                 if (verbose > 3) {
 853                         rprintf(FINFO,
 854                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 855                                 (double)i, (double)offset - n1, (long)n1,
 856                                 (unsigned long)sum1);
 857                 }
 858                 write_int(f_out, sum1);
 859                 write_buf(f_out, sum2, sum.s2length);
 860         }
 861
 862         if (mapbuf)
 863                 unmap_file(mapbuf);
 864 }
 865
 866
 867 /* Try to find a filename in the same dir as "fname" with a similar name. */
 868 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 869 {
 870         int fname_len, fname_suf_len;
 871         const char *fname_suf, *fname = file->basename;
 872         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 873         int j, lowest_j = -1;
 874
 875         fname_len = strlen(fname);
 876         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 877
 878         for (j = 0; j < dirlist->used; j++) {
 879                 struct file_struct *fp = dirlist->files[j];
 880                 const char *suf, *name;
 881                 int len, suf_len;
 882                 uint32 dist;
 883
 884                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 885                  || fp->flags & FLAG_FILE_SENT)
 886                         continue;
 887
 888                 name = fp->basename;
 889
 890                 if (F_LENGTH(fp) == F_LENGTH(file)
 891                     && cmp_time(fp->modtime, file->modtime) == 0) {
 892                         if (verbose > 4) {
 893                                 rprintf(FINFO,
 894                                         "fuzzy size/modtime match for %s\n",
 895                                         name);
 896                         }
 897                         return j;
 898                 }
 899
 900                 len = strlen(name);
 901                 suf = find_filename_suffix(name, len, &suf_len);
 902
 903                 dist = fuzzy_distance(name, len, fname, fname_len);
 904                 /* Add some extra weight to how well the suffixes match. */
 905                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 906                       * 10;
 907                 if (verbose > 4) {
 908                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 909                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 910                 }
 911                 if (dist <= lowest_dist) {
 912                         lowest_dist = dist;
 913                         lowest_j = j;
 914                 }
 915         }
 916
 917         return lowest_j;
 918 }
 919
 920 /* Copy a file found in our --copy-dest handling. */
 921 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 922 {
 923         char buf[MAXPATHLEN];
 924         const char *copy_to, *partialptr;
 925         int ok, fd_w;
 926
 927         if (inplace) {
 928                 /* Let copy_file open the destination in place. */
 929                 fd_w = -1;
 930                 copy_to = dest;
 931         } else {
 932                 fd_w = open_tmpfile(buf, dest, file);
 933                 if (fd_w < 0)
 934                         return -1;
 935                 copy_to = buf;
 936         }
 937         cleanup_set(copy_to, NULL, NULL, -1, -1);
 938         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 939                 if (verbose) {
 940                         rsyserr(FINFO, errno, "copy_file %s => %s",
 941                                 full_fname(src), copy_to);
 942                 }
 943                 /* Try to clean up. */
 944                 unlink(copy_to);
 945                 cleanup_disable();
 946                 return -1;
 947         }
 948         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 949         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 950         cleanup_disable();
 951         return ok ? 0 : -1;
 952 }
 953
 954 /* This is only called for regular files.  We return -2 if we've finished
 955  * handling the file, -1 if no dest-linking occurred, or a non-negative
 956  * value if we found an alternate basis file. */
 957 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 958                          char *cmpbuf, stat_x *sxp, int itemizing,
 959                          enum logcode code)
 960 {
 961         int best_match = -1;
 962         int match_level = 0;
 963         int j = 0;
 964
 965         do {
 966                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 967                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 968                         continue;
 969                 switch (match_level) {
 970                 case 0:
 971                         best_match = j;
 972                         match_level = 1;
 973                         /* FALL THROUGH */
 974                 case 1:
 975                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 976                                 continue;
 977                         best_match = j;
 978                         match_level = 2;
 979                         /* FALL THROUGH */
 980                 case 2:
 981                         if (!unchanged_attrs(cmpbuf, file, sxp))
 982                                 continue;
 983                         best_match = j;
 984                         match_level = 3;
 985                         break;
 986                 }
 987                 break;
 988         } while (basis_dir[++j] != NULL);
 989
 990         if (!match_level)
 991                 return -1;
 992
 993         if (j != best_match) {
 994                 j = best_match;
 995                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 996                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 997                         return -1;
 998         }
 999
1000         if (match_level == 3 && !copy_dest) {
1001 #ifdef SUPPORT_HARD_LINKS
1002                 if (link_dest) {
1003                         if (!hard_link_one(file, fname, cmpbuf, 1))
1004                                 goto try_a_copy;
1005                         if (preserve_hard_links && F_IS_HLINKED(file))
1006                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
1007                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
1008                                 itemize(cmpbuf, file, ndx, 1, sxp,
1009                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
1010                                         0, "");
1011                         }
1012                 } else
1013 #endif
1014                 if (itemizing)
1015                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1016                 if (verbose > 1 && maybe_ATTRS_REPORT)
1017                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1018                 return -2;
1019         }
1020
1021         if (match_level >= 2) {
1022 #ifdef SUPPORT_HARD_LINKS
1023           try_a_copy: /* Copy the file locally. */
1024 #endif
1025                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
1026                         return -1;
1027                 if (itemizing)
1028                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1029                 if (maybe_ATTRS_REPORT
1030                  && ((!itemizing && verbose && match_level == 2)
1031                   || (verbose > 1 && match_level == 3))) {
1032                         code = match_level == 3 ? FCLIENT : FINFO;
1033                         rprintf(code, "%s%s\n", fname,
1034                                 match_level == 3 ? " is uptodate" : "");
1035                 }
1036 #ifdef SUPPORT_HARD_LINKS
1037                 if (preserve_hard_links && F_IS_HLINKED(file))
1038                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1039 #endif
1040                 return -2;
1041         }
1042
1043         return FNAMECMP_BASIS_DIR_LOW + j;
1044 }
1045
1046 /* This is only called for non-regular files.  We return -2 if we've finished
1047  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1048  * value if we found an alternate basis file. */
1049 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1050                          char *cmpbuf, stat_x *sxp, int itemizing,
1051                          enum logcode code)
1052 {
1053         char lnk[MAXPATHLEN];
1054         int best_match = -1;
1055         int match_level = 0;
1056         enum nonregtype type;
1057         uint32 *devp;
1058         int len, j = 0;
1059
1060 #ifndef SUPPORT_LINKS
1061         if (S_ISLNK(file->mode))
1062                 return -1;
1063 #endif
1064         if (S_ISDIR(file->mode)) {
1065                 type = TYPE_DIR;
1066         } else if (IS_SPECIAL(file->mode))
1067                 type = TYPE_SPECIAL;
1068         else if (IS_DEVICE(file->mode))
1069                 type = TYPE_DEVICE;
1070 #ifdef SUPPORT_LINKS
1071         else if (S_ISLNK(file->mode))
1072                 type = TYPE_SYMLINK;
1073 #endif
1074         else {
1075                 rprintf(FERROR,
1076                         "internal: try_dests_non() called with invalid mode (%o)\n",
1077                         (int)file->mode);
1078                 exit_cleanup(RERR_UNSUPPORTED);
1079         }
1080
1081         do {
1082                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1083                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1084                         continue;
1085                 switch (type) {
1086                 case TYPE_DIR:
1087                         if (!S_ISDIR(sxp->st.st_mode))
1088                                 continue;
1089                         break;
1090                 case TYPE_SPECIAL:
1091                         if (!IS_SPECIAL(sxp->st.st_mode))
1092                                 continue;
1093                         break;
1094                 case TYPE_DEVICE:
1095                         if (!IS_DEVICE(sxp->st.st_mode))
1096                                 continue;
1097                         break;
1098 #ifdef SUPPORT_LINKS
1099                 case TYPE_SYMLINK:
1100                         if (!S_ISLNK(sxp->st.st_mode))
1101                                 continue;
1102                         break;
1103 #endif
1104                 }
1105                 if (match_level < 1) {
1106                         match_level = 1;
1107                         best_match = j;
1108                 }
1109                 switch (type) {
1110                 case TYPE_DIR:
1111                         break;
1112                 case TYPE_SPECIAL:
1113                 case TYPE_DEVICE:
1114                         devp = F_RDEV_P(file);
1115                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1116                                 continue;
1117                         break;
1118 #ifdef SUPPORT_LINKS
1119                 case TYPE_SYMLINK:
1120                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1121                                 continue;
1122                         lnk[len] = '\0';
1123                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1124                                 continue;
1125                         break;
1126 #endif
1127                 }
1128                 if (match_level < 2) {
1129                         match_level = 2;
1130                         best_match = j;
1131                 }
1132                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1133                         match_level = 3;
1134                         best_match = j;
1135                         break;
1136                 }
1137         } while (basis_dir[++j] != NULL);
1138
1139         if (!match_level)
1140                 return -1;
1141
1142         if (j != best_match) {
1143                 j = best_match;
1144                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1145                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1146                         return -1;
1147         }
1148
1149         if (match_level == 3) {
1150 #ifdef SUPPORT_HARD_LINKS
1151                 if (link_dest
1152 #ifndef CAN_HARDLINK_SYMLINK
1153                  && !S_ISLNK(file->mode)
1154 #endif
1155 #ifndef CAN_HARDLINK_SPECIAL
1156                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1157 #endif
1158                  && !S_ISDIR(file->mode)) {
1159                         if (do_link(cmpbuf, fname) < 0) {
1160                                 rsyserr(FERROR_XFER, errno,
1161                                         "failed to hard-link %s with %s",
1162                                         cmpbuf, fname);
1163                                 return j;
1164                         }
1165                         if (preserve_hard_links && F_IS_HLINKED(file))
1166                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1167                 } else
1168 #endif
1169                         match_level = 2;
1170                 if (itemizing && stdout_format_has_i
1171                  && (verbose > 1 || stdout_format_has_i > 1)) {
1172                         int chg = compare_dest && type != TYPE_DIR ? 0
1173                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1174                         char *lp = match_level == 3 ? "" : NULL;
1175                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1176                 }
1177                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1178                         rprintf(FCLIENT, "%s%s is uptodate\n",
1179                                 fname, type == TYPE_DIR ? "/" : "");
1180                 }
1181                 return -2;
1182         }
1183
1184         return j;
1185 }
1186
1187 static void list_file_entry(struct file_struct *f)
1188 {
1189         char permbuf[PERMSTRING_SIZE];
1190         double len;
1191
1192         if (!F_IS_ACTIVE(f)) {
1193                 /* this can happen if duplicate names were removed */
1194                 return;
1195         }
1196
1197         permstring(permbuf, f->mode);
1198         len = F_LENGTH(f);
1199
1200         /* TODO: indicate '+' if the entry has an ACL. */
1201
1202 #ifdef SUPPORT_LINKS
1203         if (preserve_links && S_ISLNK(f->mode)) {
1204                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1205                         permbuf, len, timestring(f->modtime),
1206                         f_name(f, NULL), F_SYMLINK(f));
1207         } else
1208 #endif
1209         {
1210                 rprintf(FINFO, "%s %11.0f %s %s\n",
1211                         permbuf, len, timestring(f->modtime),
1212                         f_name(f, NULL));
1213         }
1214 }
1215
1216 static int phase = 0;
1217 static int dflt_perms;
1218
1219 static int implied_dirs_are_missing;
1220 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1221 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1222 {
1223         return F_DEPTH(file) > F_DEPTH(subtree)
1224                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1225 }
1226
1227 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1228  * make sure it exists, and has the right permissions/timestamp info.  For
1229  * all other non-regular files (symlinks, etc.) we create them here.  For
1230  * regular files that have changed, we try to find a basis file and then
1231  * start sending checksums.  The ndx is the file's unique index value.
1232  *
1233  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1234  * passed to delete_item(), which can use it during a recursive delete.)
1235  *
1236  * Note that f_out is set to -1 when doing final directory-permission and
1237  * modification-time repair. */
1238 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1239                            int itemizing, enum logcode code, int f_out)
1240 {
1241         static const char *parent_dirname = "";
1242         /* Missing dir not created due to --dry-run; will still be scanned. */
1243         static struct file_struct *dry_missing_dir = NULL;
1244         /* Missing dir whose contents are skipped altogether due to
1245          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1246         static struct file_struct *skip_dir = NULL;
1247         static struct file_list *fuzzy_dirlist = NULL;
1248         static int need_fuzzy_dirlist = 0;
1249         struct file_struct *fuzzy_file = NULL;
1250         int fd = -1, f_copy = -1;
1251         stat_x sx, real_sx;
1252         STRUCT_STAT partial_st;
1253         struct file_struct *back_file = NULL;
1254         int statret, real_ret, stat_errno;
1255         char *fnamecmp, *partialptr, *backupptr = NULL;
1256         char fnamecmpbuf[MAXPATHLEN];
1257         uchar fnamecmp_type;
1258         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1259         int is_dir = !S_ISDIR(file->mode) ? 0
1260                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1261                    : 1;
1262
1263         if (verbose > 2)
1264                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1265
1266         if (list_only) {
1267                 if (is_dir < 0
1268                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1269                         return;
1270                 list_file_entry(file);
1271                 return;
1272         }
1273
1274         if (skip_dir) {
1275                 if (is_below(file, skip_dir)) {
1276                         if (is_dir)
1277                                 file->flags |= FLAG_MISSING_DIR;
1278 #ifdef SUPPORT_HARD_LINKS
1279                         else if (F_IS_HLINKED(file))
1280                                 handle_skipped_hlink(file, itemizing, code, f_out);
1281 #endif
1282                         return;
1283                 }
1284                 skip_dir = NULL;
1285         }
1286
1287         if (daemon_filter_list.head) {
1288                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1289                         if (is_dir < 0)
1290                                 return;
1291 #ifdef SUPPORT_HARD_LINKS
1292                         if (F_IS_HLINKED(file))
1293                                 handle_skipped_hlink(file, itemizing, code, f_out);
1294 #endif
1295                         rprintf(FERROR_XFER,
1296                                 "skipping daemon-excluded %s \"%s\"\n",
1297                                 is_dir ? "directory" : "file", fname);
1298                         if (is_dir)
1299                                 goto skipping_dir_contents;
1300                         return;
1301                 }
1302         }
1303
1304 #ifdef SUPPORT_ACLS
1305         sx.acc_acl = sx.def_acl = NULL;
1306 #endif
1307 #ifdef SUPPORT_XATTRS
1308         sx.xattr = NULL;
1309 #endif
1310         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1311           parent_is_dry_missing:
1312                 if (fuzzy_dirlist) {
1313                         flist_free(fuzzy_dirlist);
1314                         fuzzy_dirlist = NULL;
1315                 }
1316                 parent_dirname = "";
1317                 statret = -1;
1318                 stat_errno = ENOENT;
1319         } else {
1320                 const char *dn = file->dirname ? file->dirname : ".";
1321                 dry_missing_dir = NULL;
1322                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1323                         if (relative_paths && !implied_dirs
1324                          && do_stat(dn, &sx.st) < 0) {
1325                                 if (dry_run)
1326                                         goto parent_is_dry_missing;
1327                                 if (create_directory_path(fname) < 0) {
1328                                         rsyserr(FERROR_XFER, errno,
1329                                                 "recv_generator: mkdir %s failed",
1330                                                 full_fname(dn));
1331                                 }
1332                         }
1333                         if (fuzzy_dirlist) {
1334                                 flist_free(fuzzy_dirlist);
1335                                 fuzzy_dirlist = NULL;
1336                         }
1337                         if (fuzzy_basis)
1338                                 need_fuzzy_dirlist = 1;
1339 #ifdef SUPPORT_ACLS
1340                         if (!preserve_perms)
1341                                 dflt_perms = default_perms_for_dir(dn);
1342 #endif
1343                 }
1344                 parent_dirname = dn;
1345
1346                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1347                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1348                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1349                         need_fuzzy_dirlist = 0;
1350                 }
1351
1352                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1353                 stat_errno = errno;
1354         }
1355
1356         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1357                 if (is_dir) {
1358                         if (is_dir < 0)
1359                                 return;
1360                         skip_dir = file;
1361                         file->flags |= FLAG_MISSING_DIR;
1362                 }
1363 #ifdef SUPPORT_HARD_LINKS
1364                 else if (F_IS_HLINKED(file))
1365                         handle_skipped_hlink(file, itemizing, code, f_out);
1366 #endif
1367                 if (verbose > 1) {
1368                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1369                                 is_dir ? "directory" : "file", fname);
1370                 }
1371                 return;
1372         }
1373
1374         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1375          && !am_root && sx.st.st_uid == our_uid)
1376                 del_opts |= DEL_NO_UID_WRITE;
1377
1378         if (ignore_existing > 0 && statret == 0
1379          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1380                 if (verbose > 1 && is_dir >= 0)
1381                         rprintf(FINFO, "%s exists\n", fname);
1382 #ifdef SUPPORT_HARD_LINKS
1383                 if (F_IS_HLINKED(file))
1384                         handle_skipped_hlink(file, itemizing, code, f_out);
1385 #endif
1386                 goto cleanup;
1387         }
1388
1389         if (is_dir) {
1390                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1391                         goto cleanup;
1392                 if (is_dir < 0) {
1393                         /* In inc_recurse mode we want to make sure any missing
1394                          * directories get created while we're still processing
1395                          * the parent dir (which allows us to touch the parent
1396                          * dir's mtime right away).  We will handle the dir in
1397                          * full later (right before we handle its contents). */
1398                         if (statret == 0
1399                          && (S_ISDIR(sx.st.st_mode)
1400                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1401                                 goto cleanup; /* Any errors get reported later. */
1402                         if (do_mkdir(fname, file->mode & 0700) == 0)
1403                                 file->flags |= FLAG_DIR_CREATED;
1404                         goto cleanup;
1405                 }
1406                 /* The file to be received is a directory, so we need
1407                  * to prepare appropriately.  If there is already a
1408                  * file of that name and it is *not* a directory, then
1409                  * we need to delete it.  If it doesn't exist, then
1410                  * (perhaps recursively) create it. */
1411                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1412                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1413                                 goto skipping_dir_contents;
1414                         statret = -1;
1415                 }
1416                 if (dry_run && statret != 0) {
1417                         if (!dry_missing_dir)
1418                                 dry_missing_dir = file;
1419                         file->flags |= FLAG_MISSING_DIR;
1420                 }
1421                 real_ret = statret;
1422                 real_sx = sx;
1423                 if (file->flags & FLAG_DIR_CREATED)
1424                         statret = -1;
1425                 if (!preserve_perms) { /* See comment in non-dir code below. */
1426                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1427                                                dflt_perms, statret == 0);
1428                 }
1429                 if (statret != 0 && basis_dir[0] != NULL) {
1430                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1431                                               itemizing, code);
1432                         if (j == -2) {
1433                                 itemizing = 0;
1434                                 code = FNONE;
1435                         } else if (j >= 0)
1436                                 statret = 1;
1437                 }
1438                 if (itemizing && f_out != -1) {
1439                         itemize(fname, file, ndx, statret, &sx,
1440                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1441                 }
1442                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1443                         if (!relative_paths || errno != ENOENT
1444                             || create_directory_path(fname) < 0
1445                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1446                                 rsyserr(FERROR_XFER, errno,
1447                                         "recv_generator: mkdir %s failed",
1448                                         full_fname(fname));
1449                           skipping_dir_contents:
1450                                 rprintf(FERROR,
1451                                     "*** Skipping any contents from this failed directory ***\n");
1452                                 skip_dir = file;
1453                                 file->flags |= FLAG_MISSING_DIR;
1454                                 goto cleanup;
1455                         }
1456                 }
1457                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1458                     && verbose && code != FNONE && f_out != -1)
1459                         rprintf(code, "%s/\n", fname);
1460
1461                 /* We need to ensure that the dirs in the transfer have writable
1462                  * permissions during the time we are putting files within them.
1463                  * This is then fixed after the transfer is done. */
1464 #ifdef HAVE_CHMOD
1465                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1466                         mode_t mode = file->mode | S_IWUSR;
1467                         if (do_chmod(fname, mode) < 0) {
1468                                 rsyserr(FERROR_XFER, errno,
1469                                         "failed to modify permissions on %s",
1470                                         full_fname(fname));
1471                         }
1472                         need_retouch_dir_perms = 1;
1473                 }
1474 #endif
1475
1476                 if (real_ret != 0 && one_file_system)
1477                         real_sx.st.st_dev = filesystem_dev;
1478                 if (inc_recurse) {
1479                         if (one_file_system) {
1480                                 uint32 *devp = F_DIR_DEV_P(file);
1481                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1482                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1483                         }
1484                 }
1485                 else if (delete_during && f_out != -1 && !phase
1486                     && !(file->flags & FLAG_MISSING_DIR)) {
1487                         if (file->flags & FLAG_CONTENT_DIR)
1488                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1489                         else
1490                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1491
1492                 }
1493                 goto cleanup;
1494         }
1495
1496         /* If we're not preserving permissions, change the file-list's
1497          * mode based on the local permissions and some heuristics. */
1498         if (!preserve_perms) {
1499                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1500                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1501                                        exists);
1502         }
1503
1504 #ifdef SUPPORT_HARD_LINKS
1505         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1506          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1507                 goto cleanup;
1508 #endif
1509
1510         if (preserve_links && S_ISLNK(file->mode)) {
1511 #ifdef SUPPORT_LINKS
1512                 const char *sl = F_SYMLINK(file);
1513                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1514                         if (verbose) {
1515                                 if (solo_file)
1516                                         fname = f_name(file, NULL);
1517                                 rprintf(FINFO,
1518                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1519                                         full_fname(fname), sl);
1520                         }
1521                         return;
1522                 }
1523                 if (statret == 0) {
1524                         char lnk[MAXPATHLEN];
1525                         int len;
1526
1527                         if (!S_ISLNK(sx.st.st_mode))
1528                                 statret = -1;
1529                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1530                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1531                                 /* The link is pointing to the right place. */
1532                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1533                                 if (itemizing)
1534                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1535 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1536                                 if (preserve_hard_links && F_IS_HLINKED(file))
1537                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1538 #endif
1539                                 if (remove_source_files == 1)
1540                                         goto return_with_success;
1541                                 goto cleanup;
1542                         }
1543                         /* Not the right symlink (or not a symlink), so
1544                          * delete it. */
1545                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1546                                 goto cleanup;
1547                 } else if (basis_dir[0] != NULL) {
1548                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1549                                               itemizing, code);
1550                         if (j == -2) {
1551 #ifndef CAN_HARDLINK_SYMLINK
1552                                 if (link_dest) {
1553                                         /* Resort to --copy-dest behavior. */
1554                                 } else
1555 #endif
1556                                 if (!copy_dest)
1557                                         goto cleanup;
1558                                 itemizing = 0;
1559                                 code = FNONE;
1560                         } else if (j >= 0)
1561                                 statret = 1;
1562                 }
1563 #ifdef SUPPORT_HARD_LINKS
1564                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1565                         cur_flist->in_progress++;
1566                         goto cleanup;
1567                 }
1568 #endif
1569                 if (do_symlink(sl, fname) != 0) {
1570                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1571                                 full_fname(fname), sl);
1572                 } else {
1573                         set_file_attrs(fname, file, NULL, NULL, 0);
1574                         if (itemizing) {
1575                                 itemize(fname, file, ndx, statret, &sx,
1576                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1577                         }
1578                         if (code != FNONE && verbose)
1579                                 rprintf(code, "%s -> %s\n", fname, sl);
1580 #ifdef SUPPORT_HARD_LINKS
1581                         if (preserve_hard_links && F_IS_HLINKED(file))
1582                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1583 #endif
1584                         /* This does not check remove_source_files == 1
1585                          * because this is one of the items that the old
1586                          * --remove-sent-files option would remove. */
1587                         if (remove_source_files)
1588                                 goto return_with_success;
1589                 }
1590 #endif
1591                 goto cleanup;
1592         }
1593
1594         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1595          || (preserve_specials && IS_SPECIAL(file->mode))) {
1596                 uint32 *devp = F_RDEV_P(file);
1597                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1598                 if (statret == 0) {
1599                         int del_for_flag;
1600                         if (IS_DEVICE(file->mode)) {
1601                                 if (!IS_DEVICE(sx.st.st_mode))
1602                                         statret = -1;
1603                                 del_for_flag = DEL_FOR_DEVICE;
1604                         } else {
1605                                 if (!IS_SPECIAL(sx.st.st_mode))
1606                                         statret = -1;
1607                                 del_for_flag = DEL_FOR_SPECIAL;
1608                         }
1609                         if (statret == 0
1610                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1611                          && sx.st.st_rdev == rdev) {
1612                                 /* The device or special file is identical. */
1613                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1614                                 if (itemizing)
1615                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1616 #ifdef SUPPORT_HARD_LINKS
1617                                 if (preserve_hard_links && F_IS_HLINKED(file))
1618                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1619 #endif
1620                                 if (remove_source_files == 1)
1621                                         goto return_with_success;
1622                                 goto cleanup;
1623                         }
1624                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1625                                 goto cleanup;
1626                 } else if (basis_dir[0] != NULL) {
1627                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1628                                               itemizing, code);
1629                         if (j == -2) {
1630 #ifndef CAN_HARDLINK_SPECIAL
1631                                 if (link_dest) {
1632                                         /* Resort to --copy-dest behavior. */
1633                                 } else
1634 #endif
1635                                 if (!copy_dest)
1636                                         goto cleanup;
1637                                 itemizing = 0;
1638                                 code = FNONE;
1639                         } else if (j >= 0)
1640                                 statret = 1;
1641                 }
1642 #ifdef SUPPORT_HARD_LINKS
1643                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1644                         cur_flist->in_progress++;
1645                         goto cleanup;
1646                 }
1647 #endif
1648                 if (verbose > 2) {
1649                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1650                                 fname, (int)file->mode,
1651                                 (long)major(rdev), (long)minor(rdev));
1652                 }
1653                 if (do_mknod(fname, file->mode, rdev) < 0) {
1654                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1655                                 full_fname(fname));
1656                 } else {
1657                         set_file_attrs(fname, file, NULL, NULL, 0);
1658                         if (itemizing) {
1659                                 itemize(fname, file, ndx, statret, &sx,
1660                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1661                         }
1662                         if (code != FNONE && verbose)
1663                                 rprintf(code, "%s\n", fname);
1664 #ifdef SUPPORT_HARD_LINKS
1665                         if (preserve_hard_links && F_IS_HLINKED(file))
1666                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1667 #endif
1668                         if (remove_source_files == 1)
1669                                 goto return_with_success;
1670                 }
1671                 goto cleanup;
1672         }
1673
1674         if (!S_ISREG(file->mode)) {
1675                 if (solo_file)
1676                         fname = f_name(file, NULL);
1677                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1678                 goto cleanup;
1679         }
1680
1681         if (max_size > 0 && F_LENGTH(file) > max_size) {
1682                 if (verbose > 1) {
1683                         if (solo_file)
1684                                 fname = f_name(file, NULL);
1685                         rprintf(FINFO, "%s is over max-size\n", fname);
1686                 }
1687                 goto cleanup;
1688         }
1689         if (min_size > 0 && F_LENGTH(file) < min_size) {
1690                 if (verbose > 1) {
1691                         if (solo_file)
1692                                 fname = f_name(file, NULL);
1693                         rprintf(FINFO, "%s is under min-size\n", fname);
1694                 }
1695                 goto cleanup;
1696         }
1697
1698         if (update_only > 0 && statret == 0
1699             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1700                 if (verbose > 1)
1701                         rprintf(FINFO, "%s is newer\n", fname);
1702 #ifdef SUPPORT_HARD_LINKS
1703                 if (F_IS_HLINKED(file))
1704                         handle_skipped_hlink(file, itemizing, code, f_out);
1705 #endif
1706                 goto cleanup;
1707         }
1708
1709         fnamecmp = fname;
1710         fnamecmp_type = FNAMECMP_FNAME;
1711
1712         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1713                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1714                         goto cleanup;
1715                 statret = -1;
1716                 stat_errno = ENOENT;
1717         }
1718
1719         if (statret != 0 && basis_dir[0] != NULL) {
1720                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1721                                       itemizing, code);
1722                 if (j == -2) {
1723                         if (remove_source_files == 1)
1724                                 goto return_with_success;
1725                         goto cleanup;
1726                 }
1727                 if (j >= 0) {
1728                         fnamecmp = fnamecmpbuf;
1729                         fnamecmp_type = j;
1730                         statret = 0;
1731                 }
1732         }
1733
1734         real_ret = statret;
1735         real_sx = sx;
1736
1737         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1738             && link_stat(partialptr, &partial_st, 0) == 0
1739             && S_ISREG(partial_st.st_mode)) {
1740                 if (statret != 0)
1741                         goto prepare_to_open;
1742         } else
1743                 partialptr = NULL;
1744
1745         if (statret != 0 && fuzzy_dirlist) {
1746                 int j = find_fuzzy(file, fuzzy_dirlist);
1747                 if (j >= 0) {
1748                         fuzzy_file = fuzzy_dirlist->files[j];
1749                         f_name(fuzzy_file, fnamecmpbuf);
1750                         if (verbose > 2) {
1751                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1752                                         fname, fnamecmpbuf);
1753                         }
1754                         sx.st.st_size = F_LENGTH(fuzzy_file);
1755                         statret = 0;
1756                         fnamecmp = fnamecmpbuf;
1757                         fnamecmp_type = FNAMECMP_FUZZY;
1758                 }
1759         }
1760
1761         if (statret != 0) {
1762 #ifdef SUPPORT_HARD_LINKS
1763                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1764                         cur_flist->in_progress++;
1765                         goto cleanup;
1766                 }
1767 #endif
1768                 if (stat_errno == ENOENT)
1769                         goto notify_others;
1770                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1771                         full_fname(fname));
1772                 goto cleanup;
1773         }
1774
1775         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1776                 ;
1777         else if (fnamecmp_type == FNAMECMP_FUZZY)
1778                 ;
1779         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1780                 if (partialptr) {
1781                         do_unlink(partialptr);
1782                         handle_partial_dir(partialptr, PDIR_DELETE);
1783                 }
1784                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1785                 if (itemizing)
1786                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1787 #ifdef SUPPORT_HARD_LINKS
1788                 if (preserve_hard_links && F_IS_HLINKED(file))
1789                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1790 #endif
1791                 if (remove_source_files != 1)
1792                         goto cleanup;
1793           return_with_success:
1794                 if (!dry_run)
1795                         send_msg_int(MSG_SUCCESS, ndx);
1796                 goto cleanup;
1797         }
1798
1799         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1800 #ifdef SUPPORT_HARD_LINKS
1801                 if (F_IS_HLINKED(file))
1802                         handle_skipped_hlink(file, itemizing, code, f_out);
1803 #endif
1804                 goto cleanup;
1805         }
1806
1807   prepare_to_open:
1808         if (partialptr) {
1809                 sx.st = partial_st;
1810                 fnamecmp = partialptr;
1811                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1812                 statret = 0;
1813         }
1814
1815         if (!do_xfers)
1816                 goto notify_others;
1817
1818         if (read_batch || whole_file) {
1819                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1820                         if (!(backupptr = get_backup_name(fname)))
1821                                 goto cleanup;
1822                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1823                                 goto pretend_missing;
1824                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1825                                 unmake_file(back_file);
1826                                 back_file = NULL;
1827                                 goto cleanup;
1828                         }
1829                 }
1830                 goto notify_others;
1831         }
1832
1833         if (fuzzy_dirlist) {
1834                 int j = flist_find(fuzzy_dirlist, file);
1835                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1836                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1837         }
1838
1839         /* open the file */
1840         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1841                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1842                         full_fname(fnamecmp));
1843           pretend_missing:
1844                 /* pretend the file didn't exist */
1845 #ifdef SUPPORT_HARD_LINKS
1846                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1847                         cur_flist->in_progress++;
1848                         goto cleanup;
1849                 }
1850 #endif
1851                 statret = real_ret = -1;
1852                 goto notify_others;
1853         }
1854
1855         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1856                 if (!(backupptr = get_backup_name(fname))) {
1857                         close(fd);
1858                         goto cleanup;
1859                 }
1860                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1861                         close(fd);
1862                         goto pretend_missing;
1863                 }
1864                 if (robust_unlink(backupptr) && errno != ENOENT) {
1865                         rsyserr(FERROR_XFER, errno, "unlink %s",
1866                                 full_fname(backupptr));
1867                         unmake_file(back_file);
1868                         back_file = NULL;
1869                         close(fd);
1870                         goto cleanup;
1871                 }
1872                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0
1873                  && (errno != ENOENT || make_bak_dir(backupptr) < 0
1874                   || (f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)) {
1875                         rsyserr(FERROR_XFER, errno, "open %s",
1876                                 full_fname(backupptr));
1877                         unmake_file(back_file);
1878                         back_file = NULL;
1879                         close(fd);
1880                         goto cleanup;
1881                 }
1882                 fnamecmp_type = FNAMECMP_BACKUP;
1883         }
1884
1885         if (verbose > 3) {
1886                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1887                         fnamecmp, (double)sx.st.st_size);
1888         }
1889
1890         if (verbose > 2)
1891                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1892
1893   notify_others:
1894         if (remove_source_files && !delay_updates && !phase && !dry_run)
1895                 increment_active_files(ndx, itemizing, code);
1896         if (inc_recurse && !dry_run)
1897                 cur_flist->in_progress++;
1898 #ifdef SUPPORT_HARD_LINKS
1899         if (preserve_hard_links && F_IS_HLINKED(file))
1900                 file->flags |= FLAG_FILE_SENT;
1901 #endif
1902         write_ndx(f_out, ndx);
1903         if (itemizing) {
1904                 int iflags = ITEM_TRANSFER;
1905                 if (always_checksum > 0)
1906                         iflags |= ITEM_REPORT_CHANGE;
1907                 if (fnamecmp_type != FNAMECMP_FNAME)
1908                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1909                 if (fnamecmp_type == FNAMECMP_FUZZY)
1910                         iflags |= ITEM_XNAME_FOLLOWS;
1911                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1912                         fuzzy_file ? fuzzy_file->basename : NULL);
1913 #ifdef SUPPORT_ACLS
1914                 if (preserve_acls)
1915                         free_acl(&real_sx);
1916 #endif
1917 #ifdef SUPPORT_XATTRS
1918                 if (preserve_xattrs)
1919                         free_xattr(&real_sx);
1920 #endif
1921         }
1922
1923         if (!do_xfers) {
1924 #ifdef SUPPORT_HARD_LINKS
1925                 if (preserve_hard_links && F_IS_HLINKED(file))
1926                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1927 #endif
1928                 goto cleanup;
1929         }
1930         if (read_batch)
1931                 goto cleanup;
1932
1933         if (statret != 0 || whole_file)
1934                 write_sum_head(f_out, NULL);
1935         else {
1936                 generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy);
1937                 close(fd);
1938         }
1939
1940   cleanup:
1941         if (back_file) {
1942                 if (f_copy >= 0)
1943                         close(f_copy);
1944                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1945                 if (verbose > 1) {
1946                         rprintf(FINFO, "backed up %s to %s\n",
1947                                 fname, backupptr);
1948                 }
1949                 unmake_file(back_file);
1950         }
1951
1952 #ifdef SUPPORT_ACLS
1953         if (preserve_acls)
1954                 free_acl(&sx);
1955 #endif
1956 #ifdef SUPPORT_XATTRS
1957         if (preserve_xattrs)
1958                 free_xattr(&sx);
1959 #endif
1960         return;
1961 }
1962
1963 #ifdef SUPPORT_HARD_LINKS
1964 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
1965                                  enum logcode code, int f_out)
1966 {
1967         char fbuf[MAXPATHLEN];
1968         int new_last_ndx;
1969         struct file_list *save_flist = cur_flist;
1970
1971         /* If we skip the last item in a chain of links and there was a
1972          * prior non-skipped hard-link waiting to finish, finish it now. */
1973         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
1974                 return;
1975
1976         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
1977         cur_flist->in_progress--; /* undo prior increment */
1978         f_name(file, fbuf);
1979         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
1980
1981         cur_flist = save_flist;
1982 }
1983 #endif
1984
1985 static void touch_up_dirs(struct file_list *flist, int ndx)
1986 {
1987         static int counter = 0;
1988         struct file_struct *file;
1989         char *fname;
1990         int i, start, end;
1991
1992         if (ndx < 0) {
1993                 start = 0;
1994                 end = flist->used - 1;
1995         } else
1996                 start = end = ndx;
1997
1998         /* Fix any directory permissions that were modified during the
1999          * transfer and/or re-set any tweaked modified-time values. */
2000         for (i = start; i <= end; i++, counter++) {
2001                 file = flist->files[i];
2002                 if (!S_ISDIR(file->mode)
2003                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2004                         continue;
2005                 if (verbose > 3) {
2006                         fname = f_name(file, NULL);
2007                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2008                                 NS(fname), i);
2009                 }
2010                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
2011                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
2012                         continue;
2013                 fname = f_name(file, NULL);
2014                 if (!(file->mode & S_IWUSR))
2015                         do_chmod(fname, file->mode);
2016                 if (need_retouch_dir_times) {
2017                         STRUCT_STAT st;
2018                         if (link_stat(fname, &st, 0) == 0
2019                          && cmp_time(st.st_mtime, file->modtime) != 0)
2020                                 set_modtime(fname, file->modtime, file->mode);
2021                 }
2022                 if (allowed_lull && !(counter % lull_mod))
2023                         maybe_send_keepalive();
2024                 else if (!(counter & 0xFF))
2025                         maybe_flush_socket(0);
2026         }
2027 }
2028
2029 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2030 {
2031         struct file_struct *file;
2032         struct file_list *flist;
2033         char fbuf[MAXPATHLEN];
2034         int ndx;
2035
2036         while (1) {
2037 #ifdef SUPPORT_HARD_LINKS
2038                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2039                         flist = flist_for_ndx(ndx);
2040                         assert(flist != NULL);
2041                         file = flist->files[ndx - flist->ndx_start];
2042                         assert(file->flags & FLAG_HLINKED);
2043                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2044                         flist->in_progress--;
2045                         continue;
2046                 }
2047 #endif
2048
2049                 if (check_redo && (ndx = get_redo_num()) != -1) {
2050                         csum_length = SUM_LENGTH;
2051                         max_size = -max_size;
2052                         min_size = -min_size;
2053                         ignore_existing = -ignore_existing;
2054                         ignore_non_existing = -ignore_non_existing;
2055                         update_only = -update_only;
2056                         always_checksum = -always_checksum;
2057                         size_only = -size_only;
2058                         append_mode = -append_mode;
2059                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2060                         ignore_times++;
2061
2062                         flist = cur_flist;
2063                         cur_flist = flist_for_ndx(ndx);
2064
2065                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2066                         if (solo_file)
2067                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2068                         else
2069                                 f_name(file, fbuf);
2070                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2071                         cur_flist->to_redo--;
2072
2073                         cur_flist = flist;
2074
2075                         csum_length = SHORT_SUM_LENGTH;
2076                         max_size = -max_size;
2077                         min_size = -min_size;
2078                         ignore_existing = -ignore_existing;
2079                         ignore_non_existing = -ignore_non_existing;
2080                         update_only = -update_only;
2081                         always_checksum = -always_checksum;
2082                         size_only = -size_only;
2083                         append_mode = -append_mode;
2084                         make_backups = -make_backups;
2085                         ignore_times--;
2086                         continue;
2087                 }
2088
2089                 if (cur_flist == first_flist)
2090                         break;
2091
2092                 /* We only get here if inc_recurse is enabled. */
2093                 if (first_flist->in_progress || first_flist->to_redo)
2094                         break;
2095
2096                 if (!read_batch) {
2097                         write_ndx(sock_f_out, NDX_DONE);
2098                         maybe_flush_socket(1);
2099                 }
2100
2101                 if (delete_during == 2 || !dir_tweaking) {
2102                         /* Skip directory touch-up. */
2103                 } else if (first_flist->parent_ndx >= 0)
2104                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2105
2106                 flist_free(first_flist); /* updates first_flist */
2107         }
2108 }
2109
2110 void generate_files(int f_out, const char *local_name)
2111 {
2112         int i, ndx;
2113         char fbuf[MAXPATHLEN];
2114         int itemizing;
2115         enum logcode code;
2116         int save_do_progress = do_progress;
2117
2118         if (protocol_version >= 29) {
2119                 itemizing = 1;
2120                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2121                 code = logfile_format_has_i ? FNONE : FLOG;
2122         } else if (am_daemon) {
2123                 itemizing = logfile_format_has_i && do_xfers;
2124                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2125                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2126         } else if (!am_server) {
2127                 itemizing = stdout_format_has_i;
2128                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2129                 code = itemizing ? FNONE : FINFO;
2130         } else {
2131                 itemizing = 0;
2132                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2133                 code = FINFO;
2134         }
2135         solo_file = local_name;
2136         dir_tweaking = !(list_only || solo_file || dry_run);
2137         need_retouch_dir_times = preserve_times > 1;
2138         lull_mod = allowed_lull * 5;
2139         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2140             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2141         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2142
2143         if (verbose > 2)
2144                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2145
2146         if (delete_before && !solo_file && cur_flist->used > 0)
2147                 do_delete_pass();
2148         if (delete_during == 2) {
2149                 deldelay_size = BIGPATHBUFLEN * 4;
2150                 deldelay_buf = new_array(char, deldelay_size);
2151                 if (!deldelay_buf)
2152                         out_of_memory("delete-delay");
2153         }
2154         do_progress = 0;
2155
2156         if (append_mode > 0 || whole_file < 0)
2157                 whole_file = 0;
2158         if (verbose >= 2) {
2159                 rprintf(FINFO, "delta-transmission %s\n",
2160                         whole_file
2161                         ? "disabled for local transfer or --whole-file"
2162                         : "enabled");
2163         }
2164
2165         /* Since we often fill up the outgoing socket and then just sit around
2166          * waiting for the other 2 processes to do their thing, we don't want
2167          * to exit on a timeout.  If the data stops flowing, the receiver will
2168          * notice that and let us know via the redo pipe (or its closing). */
2169         ignore_timeout = 1;
2170
2171         dflt_perms = (ACCESSPERMS & ~orig_umask);
2172
2173         do {
2174 #ifdef SUPPORT_HARD_LINKS
2175                 if (preserve_hard_links && inc_recurse) {
2176                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2177                                 wait_for_receiver();
2178                 }
2179 #endif
2180
2181                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2182                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2183                         f_name(fp, fbuf);
2184                         ndx = cur_flist->ndx_start - 1;
2185                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2186                         if (delete_during && dry_run < 2 && !list_only
2187                          && !(fp->flags & FLAG_MISSING_DIR)) {
2188                                 if (fp->flags & FLAG_CONTENT_DIR) {
2189                                         dev_t dirdev;
2190                                         if (one_file_system) {
2191                                                 uint32 *devp = F_DIR_DEV_P(fp);
2192                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2193                                         } else
2194                                                 dirdev = MAKEDEV(0, 0);
2195                                         delete_in_dir(fbuf, fp, &dirdev);
2196                                 } else
2197                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2198                         }
2199                 }
2200                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2201                         struct file_struct *file = cur_flist->sorted[i];
2202
2203                         if (!F_IS_ACTIVE(file))
2204                                 continue;
2205
2206                         if (unsort_ndx)
2207                                 ndx = F_NDX(file);
2208                         else
2209                                 ndx = i + cur_flist->ndx_start;
2210
2211                         if (solo_file)
2212                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2213                         else
2214                                 f_name(file, fbuf);
2215                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2216
2217                         check_for_finished_files(itemizing, code, 0);
2218
2219                         if (allowed_lull && !(i % lull_mod))
2220                                 maybe_send_keepalive();
2221                         else if (!(i & 0xFF))
2222                                 maybe_flush_socket(0);
2223                 }
2224
2225                 if (!inc_recurse) {
2226                         write_ndx(f_out, NDX_DONE);
2227                         break;
2228                 }
2229
2230                 while (1) {
2231                         check_for_finished_files(itemizing, code, 1);
2232                         if (cur_flist->next || flist_eof)
2233                                 break;
2234                         wait_for_receiver();
2235                 }
2236         } while ((cur_flist = cur_flist->next) != NULL);
2237
2238         if (delete_during)
2239                 delete_in_dir(NULL, NULL, &dev_zero);
2240         phase++;
2241         if (verbose > 2)
2242                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2243
2244         while (1) {
2245                 check_for_finished_files(itemizing, code, 1);
2246                 if (msgdone_cnt)
2247                         break;
2248                 wait_for_receiver();
2249         }
2250
2251         phase++;
2252         if (verbose > 2)
2253                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2254
2255         write_ndx(f_out, NDX_DONE);
2256         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2257         if (protocol_version >= 29 && !delay_updates)
2258                 write_ndx(f_out, NDX_DONE);
2259
2260         /* Read MSG_DONE for the redo phase (and any prior messages). */
2261         while (1) {
2262                 check_for_finished_files(itemizing, code, 0);
2263                 if (msgdone_cnt > 1)
2264                         break;
2265                 wait_for_receiver();
2266         }
2267
2268         if (protocol_version >= 29) {
2269                 phase++;
2270                 if (verbose > 2)
2271                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2272                 if (delay_updates)
2273                         write_ndx(f_out, NDX_DONE);
2274                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2275                 while (msgdone_cnt == 2)
2276                         wait_for_receiver();
2277         }
2278
2279         do_progress = save_do_progress;
2280         if (delete_during == 2)
2281                 do_delayed_deletions(fbuf);
2282         if (delete_after && !solo_file && file_total > 0)
2283                 do_delete_pass();
2284
2285         if ((need_retouch_dir_perms || need_retouch_dir_times)
2286          && dir_tweaking && (!inc_recurse || delete_during == 2))
2287                 touch_up_dirs(dir_flist, -1);
2288
2289         if (max_delete >= 0 && deletion_count > max_delete) {
2290                 rprintf(FINFO,
2291                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2292                         deletion_count - max_delete);
2293                 io_error |= IOERR_DEL_LIMIT;
2294         }
2295
2296         if (verbose > 2)
2297                 rprintf(FINFO, "generate_files finished\n");
2298 }