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