generator.c

   1 /*
   2  * Routines that are exclusive to the generator process.
   3  *
   4  * Copyright (C) 1996-2000 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2003-2008 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24
  25 extern int verbose;
  26 extern int dry_run;
  27 extern int do_xfers;
  28 extern int stdout_format_has_i;
  29 extern int logfile_format_has_i;
  30 extern int am_root;
  31 extern int am_server;
  32 extern int am_daemon;
  33 extern int inc_recurse;
  34 extern int do_progress;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_acls;
  39 extern int preserve_xattrs;
  40 extern int preserve_links;
  41 extern int preserve_devices;
  42 extern int preserve_specials;
  43 extern int preserve_hard_links;
  44 extern int preserve_executability;
  45 extern int preserve_perms;
  46 extern int preserve_times;
  47 extern int uid_ndx;
  48 extern int gid_ndx;
  49 extern int delete_mode;
  50 extern int delete_before;
  51 extern int delete_during;
  52 extern int delete_after;
  53 extern int msgdone_cnt;
  54 extern int ignore_errors;
  55 extern int remove_source_files;
  56 extern int delay_updates;
  57 extern int update_only;
  58 extern int ignore_existing;
  59 extern int ignore_non_existing;
  60 extern int inplace;
  61 extern int append_mode;
  62 extern int make_backups;
  63 extern int csum_length;
  64 extern int ignore_times;
  65 extern int size_only;
  66 extern OFF_T max_size;
  67 extern OFF_T min_size;
  68 extern int io_error;
  69 extern int flist_eof;
  70 extern int allowed_lull;
  71 extern int sock_f_out;
  72 extern int ignore_timeout;
  73 extern int protocol_version;
  74 extern int file_total;
  75 extern int fuzzy_basis;
  76 extern int always_checksum;
  77 extern int checksum_len;
  78 extern char *partial_dir;
  79 extern char *basis_dir[];
  80 extern int compare_dest;
  81 extern int copy_dest;
  82 extern int link_dest;
  83 extern int whole_file;
  84 extern int list_only;
  85 extern int read_batch;
  86 extern int safe_symlinks;
  87 extern long block_size; /* "long" because popt can't set an int32. */
  88 extern int unsort_ndx;
  89 extern int max_delete;
  90 extern int force_delete;
  91 extern int one_file_system;
  92 extern struct stats stats;
  93 extern dev_t filesystem_dev;
  94 extern mode_t orig_umask;
  95 extern uid_t our_uid;
  96 extern char *backup_dir;
  97 extern char *backup_suffix;
  98 extern int backup_suffix_len;
  99 extern struct file_list *cur_flist, *first_flist, *dir_flist;
 100 extern struct filter_list_struct server_filter_list;
 101
 102 int ignore_perishable = 0;
 103 int non_perishable_cnt = 0;
 104 int maybe_ATTRS_REPORT = 0;
 105
 106 static dev_t dev_zero;
 107 static int deletion_count = 0; /* used to implement --max-delete */
 108 static int deldelay_size = 0, deldelay_cnt = 0;
 109 static char *deldelay_buf = NULL;
 110 static int deldelay_fd = -1;
 111 static int lull_mod;
 112 static int dir_tweaking;
 113 static int symlink_timeset_failed_flags;
 114 static int need_retouch_dir_times;
 115 static int need_retouch_dir_perms;
 116 static const char *solo_file = NULL;
 117
 118 /* For calling delete_item() and delete_dir_contents(). */
 119 #define DEL_NO_UID_WRITE        (1<<0) /* file/dir has our uid w/o write perm */
 120 #define DEL_RECURSE             (1<<1) /* if dir, delete all contents */
 121 #define DEL_DIR_IS_EMPTY        (1<<2) /* internal delete_FUNCTIONS use only */
 122 #define DEL_FOR_FILE            (1<<3) /* making room for a replacement file */
 123 #define DEL_FOR_DIR             (1<<4) /* making room for a replacement dir */
 124 #define DEL_FOR_SYMLINK         (1<<5) /* making room for a replacement symlink */
 125 #define DEL_FOR_DEVICE          (1<<6) /* making room for a replacement device */
 126 #define DEL_FOR_SPECIAL         (1<<7) /* making room for a replacement special */
 127
 128 #define DEL_MAKE_ROOM (DEL_FOR_FILE|DEL_FOR_DIR|DEL_FOR_SYMLINK|DEL_FOR_DEVICE|DEL_FOR_SPECIAL)
 129
 130 enum nonregtype {
 131     TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 132 };
 133
 134 enum delret {
 135     DR_SUCCESS = 0, DR_FAILURE, DR_AT_LIMIT, DR_NOT_EMPTY
 136 };
 137
 138 /* Forward declaration for delete_item(). */
 139 static enum delret delete_dir_contents(char *fname, uint16 flags);
 140
 141 static int is_backup_file(char *fn)
 142 {
 143         int k = strlen(fn) - backup_suffix_len;
 144         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
 145 }
 146
 147 /* Delete a file or directory.  If DEL_RECURSE is set in the flags, this will
 148  * delete recursively.
 149  *
 150  * Note that fbuf must point to a MAXPATHLEN buffer if the mode indicates it's
 151  * a directory! (The buffer is used for recursion, but returned unchanged.)
 152  */
 153 static enum delret delete_item(char *fbuf, uint16 mode, uint16 flags)
 154 {
 155         enum delret ret;
 156         char *what;
 157         int ok;
 158
 159         if (verbose > 2) {
 160                 rprintf(FINFO, "delete_item(%s) mode=%o flags=%d\n",
 161                         fbuf, (int)mode, (int)flags);
 162         }
 163
 164         if (flags & DEL_NO_UID_WRITE)
 165                 do_chmod(fbuf, mode | S_IWUSR);
 166
 167         if (S_ISDIR(mode) && !(flags & DEL_DIR_IS_EMPTY)) {
 168                 int save_uid_ndx = uid_ndx;
 169                 /* This only happens on the first call to delete_item() since
 170                  * delete_dir_contents() always calls us w/DEL_DIR_IS_EMPTY. */
 171                 if (!uid_ndx)
 172                         uid_ndx = ++file_extra_cnt;
 173                 ignore_perishable = 1;
 174                 /* If DEL_RECURSE is not set, this just reports emptiness. */
 175                 ret = delete_dir_contents(fbuf, flags);
 176                 ignore_perishable = 0;
 177                 if (!save_uid_ndx) {
 178                         --file_extra_cnt;
 179                         uid_ndx = 0;
 180                 }
 181                 if (ret == DR_NOT_EMPTY || ret == DR_AT_LIMIT)
 182                         goto check_ret;
 183                 /* OK: try to delete the directory. */
 184         }
 185
 186         if (!(flags & DEL_MAKE_ROOM) && max_delete >= 0 && ++deletion_count > max_delete)
 187                 return DR_AT_LIMIT;
 188
 189         if (S_ISDIR(mode)) {
 190                 what = "rmdir";
 191                 ok = do_rmdir(fbuf) == 0;
 192         } else if (make_backups > 0 && (backup_dir || !is_backup_file(fbuf))) {
 193                 what = "make_backup";
 194                 ok = make_backup(fbuf);
 195         } else {
 196                 what = "unlink";
 197                 ok = robust_unlink(fbuf) == 0;
 198         }
 199
 200         if (ok) {
 201                 if (!(flags & DEL_MAKE_ROOM))
 202                         log_delete(fbuf, mode);
 203                 ret = DR_SUCCESS;
 204         } else {
 205                 if (S_ISDIR(mode) && errno == ENOTEMPTY) {
 206                         rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 207                                 fbuf);
 208                         ret = DR_NOT_EMPTY;
 209                 } else if (errno != ENOENT) {
 210                         rsyserr(FERROR, errno, "delete_file: %s(%s) failed",
 211                                 what, fbuf);
 212                         ret = DR_FAILURE;
 213                 } else {
 214                         deletion_count--;
 215                         ret = DR_SUCCESS;
 216                 }
 217         }
 218
 219   check_ret:
 220         if (ret != DR_SUCCESS && flags & DEL_MAKE_ROOM) {
 221                 const char *desc;
 222                 switch (flags & DEL_MAKE_ROOM) {
 223                 case DEL_FOR_FILE: desc = "regular file"; break;
 224                 case DEL_FOR_DIR: desc = "directory"; break;
 225                 case DEL_FOR_SYMLINK: desc = "symlink"; break;
 226                 case DEL_FOR_DEVICE: desc = "device file"; break;
 227                 case DEL_FOR_SPECIAL: desc = "special file"; break;
 228                 default: exit_cleanup(RERR_UNSUPPORTED); /* IMPOSSIBLE */
 229                 }
 230                 rprintf(FERROR_XFER, "could not make way for new %s: %s\n",
 231                         desc, fbuf);
 232         }
 233         return ret;
 234 }
 235
 236 /* The directory is about to be deleted: if DEL_RECURSE is given, delete all
 237  * its contents, otherwise just checks for content.  Returns DR_SUCCESS or
 238  * DR_NOT_EMPTY.  Note that fname must point to a MAXPATHLEN buffer!  (The
 239  * buffer is used for recursion, but returned unchanged.)
 240  */
 241 static enum delret delete_dir_contents(char *fname, uint16 flags)
 242 {
 243         struct file_list *dirlist;
 244         enum delret ret;
 245         unsigned remainder;
 246         void *save_filters;
 247         int j, dlen;
 248         char *p;
 249
 250         if (verbose > 3) {
 251                 rprintf(FINFO, "delete_dir_contents(%s) flags=%d\n",
 252                         fname, flags);
 253         }
 254
 255         dlen = strlen(fname);
 256         save_filters = push_local_filters(fname, dlen);
 257
 258         non_perishable_cnt = 0;
 259         dirlist = get_dirlist(fname, dlen, 0);
 260         ret = non_perishable_cnt ? DR_NOT_EMPTY : DR_SUCCESS;
 261
 262         if (!dirlist->used)
 263                 goto done;
 264
 265         if (!(flags & DEL_RECURSE)) {
 266                 ret = DR_NOT_EMPTY;
 267                 goto done;
 268         }
 269
 270         p = fname + dlen;
 271         if (dlen != 1 || *fname != '/')
 272                 *p++ = '/';
 273         remainder = MAXPATHLEN - (p - fname);
 274
 275         /* We do our own recursion, so make delete_item() non-recursive. */
 276         flags = (flags & ~(DEL_RECURSE|DEL_MAKE_ROOM|DEL_NO_UID_WRITE))
 277               | DEL_DIR_IS_EMPTY;
 278
 279         for (j = dirlist->used; j--; ) {
 280                 struct file_struct *fp = dirlist->files[j];
 281
 282                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 283                         if (verbose > 1) {
 284                                 rprintf(FINFO,
 285                                     "mount point, %s, pins parent directory\n",
 286                                     f_name(fp, NULL));
 287                         }
 288                         ret = DR_NOT_EMPTY;
 289                         continue;
 290                 }
 291
 292                 strlcpy(p, fp->basename, remainder);
 293                 if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 294                         do_chmod(fname, fp->mode | S_IWUSR);
 295                 /* Save stack by recursing to ourself directly. */
 296                 if (S_ISDIR(fp->mode)) {
 297                         if (delete_dir_contents(fname, flags | DEL_RECURSE) != DR_SUCCESS)
 298                                 ret = DR_NOT_EMPTY;
 299                 }
 300                 if (delete_item(fname, fp->mode, flags) != DR_SUCCESS)
 301                         ret = DR_NOT_EMPTY;
 302         }
 303
 304         fname[dlen] = '\0';
 305
 306   done:
 307         flist_free(dirlist);
 308         pop_local_filters(save_filters);
 309
 310         if (ret == DR_NOT_EMPTY) {
 311                 rprintf(FINFO, "cannot delete non-empty directory: %s\n",
 312                         fname);
 313         }
 314         return ret;
 315 }
 316
 317 static int start_delete_delay_temp(void)
 318 {
 319         char fnametmp[MAXPATHLEN];
 320         int save_dry_run = dry_run;
 321
 322         dry_run = 0;
 323         if (!get_tmpname(fnametmp, "deldelay")
 324          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 325                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 326                         inc_recurse ? "" : " -- switching to --delete-after");
 327                 delete_during = 0;
 328                 delete_after = !inc_recurse;
 329                 dry_run = save_dry_run;
 330                 return 0;
 331         }
 332         unlink(fnametmp);
 333         dry_run = save_dry_run;
 334         return 1;
 335 }
 336
 337 static int flush_delete_delay(void)
 338 {
 339         if (deldelay_fd < 0 && !start_delete_delay_temp())
 340                 return 0;
 341         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 342                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 343                 delete_during = 0;
 344                 delete_after = !inc_recurse;
 345                 close(deldelay_fd);
 346                 return 0;
 347         }
 348         deldelay_cnt = 0;
 349         return 1;
 350 }
 351
 352 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 353 {
 354         int len;
 355
 356         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 357                 return 0;
 358
 359         if (flags & DEL_NO_UID_WRITE)
 360                 deldelay_buf[deldelay_cnt++] = '!';
 361
 362         while (1) {
 363                 len = snprintf(deldelay_buf + deldelay_cnt,
 364                                deldelay_size - deldelay_cnt,
 365                                "%x %s%c",
 366                                (int)file->mode, fname, '\0');
 367                 if ((deldelay_cnt += len) <= deldelay_size)
 368                         break;
 369                 deldelay_cnt -= len;
 370                 if (!flush_delete_delay())
 371                         return 0;
 372         }
 373
 374         return 1;
 375 }
 376
 377 static int read_delay_line(char *buf, int *flags_p)
 378 {
 379         static int read_pos = 0;
 380         int j, len, mode;
 381         char *bp, *past_space;
 382
 383         while (1) {
 384                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 385                 if (j < deldelay_cnt)
 386                         break;
 387                 if (deldelay_fd < 0) {
 388                         if (j > read_pos)
 389                                 goto invalid_data;
 390                         return -1;
 391                 }
 392                 deldelay_cnt -= read_pos;
 393                 if (deldelay_cnt == deldelay_size)
 394                         goto invalid_data;
 395                 if (deldelay_cnt && read_pos) {
 396                         memmove(deldelay_buf, deldelay_buf + read_pos,
 397                                 deldelay_cnt);
 398                 }
 399                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 400                            deldelay_size - deldelay_cnt);
 401                 if (len == 0) {
 402                         if (deldelay_cnt) {
 403                                 rprintf(FERROR,
 404                                     "ERROR: unexpected EOF in delete-delay file.\n");
 405                         }
 406                         return -1;
 407                 }
 408                 if (len < 0) {
 409                         rsyserr(FERROR, errno,
 410                                 "reading delete-delay file");
 411                         return -1;
 412                 }
 413                 deldelay_cnt += len;
 414                 read_pos = 0;
 415         }
 416
 417         bp = deldelay_buf + read_pos;
 418         if (*bp == '!') {
 419                 bp++;
 420                 *flags_p = DEL_NO_UID_WRITE;
 421         } else
 422                 *flags_p = 0;
 423
 424         if (sscanf(bp, "%x ", &mode) != 1) {
 425           invalid_data:
 426                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 427                 return -1;
 428         }
 429         past_space = strchr(bp, ' ') + 1;
 430         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 431         read_pos = j + 1;
 432
 433         if (len > MAXPATHLEN) {
 434                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 435                 return -1;
 436         }
 437
 438         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 439          * instead of returning a pointer to our buffer. */
 440         memcpy(buf, past_space, len);
 441
 442         return mode;
 443 }
 444
 445 static void do_delayed_deletions(char *delbuf)
 446 {
 447         int mode, flags;
 448
 449         if (deldelay_fd >= 0) {
 450                 if (deldelay_cnt && !flush_delete_delay())
 451                         return;
 452                 lseek(deldelay_fd, 0, 0);
 453         }
 454         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 455                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 456         if (deldelay_fd >= 0)
 457                 close(deldelay_fd);
 458 }
 459
 460 /* This function is used to implement per-directory deletion, and is used by
 461  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 462  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 463  * call will append names onto the end, but the old dir value will be restored
 464  * on exit). */
 465 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 466 {
 467         static int already_warned = 0;
 468         struct file_list *dirlist;
 469         char delbuf[MAXPATHLEN];
 470         int dlen, i;
 471         int save_uid_ndx = uid_ndx;
 472
 473         if (!fbuf) {
 474                 change_local_filter_dir(NULL, 0, 0);
 475                 return;
 476         }
 477
 478         if (verbose > 2)
 479                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 480
 481         if (allowed_lull)
 482                 maybe_send_keepalive();
 483
 484         if (io_error && !ignore_errors) {
 485                 if (already_warned)
 486                         return;
 487                 rprintf(FINFO,
 488                         "IO error encountered -- skipping file deletion\n");
 489                 already_warned = 1;
 490                 return;
 491         }
 492
 493         dlen = strlen(fbuf);
 494         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 495
 496         if (one_file_system) {
 497                 if (file->flags & FLAG_TOP_DIR)
 498                         filesystem_dev = *fs_dev;
 499                 else if (filesystem_dev != *fs_dev)
 500                         return;
 501         }
 502
 503         if (!uid_ndx)
 504                 uid_ndx = ++file_extra_cnt;
 505
 506         dirlist = get_dirlist(fbuf, dlen, 0);
 507
 508         /* If an item in dirlist is not found in flist, delete it
 509          * from the filesystem. */
 510         for (i = dirlist->used; i--; ) {
 511                 struct file_struct *fp = dirlist->files[i];
 512                 if (!F_IS_ACTIVE(fp))
 513                         continue;
 514                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 515                         if (verbose > 1)
 516                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 517                                         f_name(fp, NULL));
 518                         continue;
 519                 }
 520                 if (flist_find(cur_flist, fp) < 0) {
 521                         int flags = DEL_RECURSE;
 522                         if (!(fp->mode & S_IWUSR) && !am_root && (uid_t)F_OWNER(fp) == our_uid)
 523                                 flags |= DEL_NO_UID_WRITE;
 524                         f_name(fp, delbuf);
 525                         if (delete_during == 2) {
 526                                 if (!remember_delete(fp, delbuf, flags))
 527                                         break;
 528                         } else
 529                                 delete_item(delbuf, fp->mode, flags);
 530                 }
 531         }
 532
 533         flist_free(dirlist);
 534
 535         if (!save_uid_ndx) {
 536                 --file_extra_cnt;
 537                 uid_ndx = 0;
 538         }
 539 }
 540
 541 /* This deletes any files on the receiving side that are not present on the
 542  * sending side.  This is used by --delete-before and --delete-after. */
 543 static void do_delete_pass(void)
 544 {
 545         char fbuf[MAXPATHLEN];
 546         STRUCT_STAT st;
 547         int j;
 548
 549         /* dry_run is incremented when the destination doesn't exist yet. */
 550         if (dry_run > 1 || list_only)
 551                 return;
 552
 553         for (j = 0; j < cur_flist->used; j++) {
 554                 struct file_struct *file = cur_flist->sorted[j];
 555
 556                 if (!(file->flags & FLAG_CONTENT_DIR))
 557                         continue;
 558
 559                 f_name(file, fbuf);
 560                 if (verbose > 1 && file->flags & FLAG_TOP_DIR)
 561                         rprintf(FINFO, "deleting in %s\n", fbuf);
 562
 563                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 564                  || !S_ISDIR(st.st_mode))
 565                         continue;
 566
 567                 delete_in_dir(fbuf, file, &st.st_dev);
 568         }
 569         delete_in_dir(NULL, NULL, &dev_zero);
 570
 571         if (do_progress && !am_server)
 572                 rprintf(FINFO, "                    \r");
 573 }
 574
 575 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 576 {
 577 #if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
 578         if (S_ISLNK(file->mode)) {
 579                 ;
 580         } else
 581 #endif
 582         if (preserve_times && cmp_time(sxp->st.st_mtime, file->modtime) != 0)
 583                 return 0;
 584
 585         if (preserve_perms) {
 586                 if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 587                         return 0;
 588         } else if (preserve_executability
 589          && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 590                 return 0;
 591
 592         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 593                 return 0;
 594
 595         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 596                 return 0;
 597
 598 #ifdef SUPPORT_ACLS
 599         if (preserve_acls && !S_ISLNK(file->mode)) {
 600                 if (!ACL_READY(*sxp))
 601                         get_acl(fname, sxp);
 602                 if (set_acl(NULL, file, sxp) == 0)
 603                         return 0;
 604         }
 605 #endif
 606 #ifdef SUPPORT_XATTRS
 607         if (preserve_xattrs) {
 608                 if (!XATTR_READY(*sxp))
 609                         get_xattr(fname, sxp);
 610                 if (xattr_diff(file, sxp, 0))
 611                         return 0;
 612         }
 613 #endif
 614
 615         return 1;
 616 }
 617
 618 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 619              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 620              const char *xname)
 621 {
 622         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 623                 int keep_time = !preserve_times ? 0
 624                     : S_ISDIR(file->mode) ? preserve_times > 1 :
 625 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
 626                     1;
 627 #else
 628                     !S_ISLNK(file->mode);
 629 #endif
 630
 631                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 632                         iflags |= ITEM_REPORT_SIZE;
 633                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 634                         if (iflags & ITEM_LOCAL_CHANGE)
 635                                 iflags |= symlink_timeset_failed_flags;
 636                 } else if (keep_time
 637                  ? cmp_time(file->modtime, sxp->st.st_mtime) != 0
 638                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 639                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 640                         iflags |= ITEM_REPORT_TIME;
 641 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 642                 if (S_ISLNK(file->mode)) {
 643                         ;
 644                 } else
 645 #endif
 646                 if (preserve_perms) {
 647                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 648                                 iflags |= ITEM_REPORT_PERMS;
 649                 } else if (preserve_executability
 650                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 651                         iflags |= ITEM_REPORT_PERMS;
 652                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 653                         iflags |= ITEM_REPORT_OWNER;
 654                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP)
 655                     && sxp->st.st_gid != (gid_t)F_GROUP(file))
 656                         iflags |= ITEM_REPORT_GROUP;
 657 #ifdef SUPPORT_ACLS
 658                 if (preserve_acls && !S_ISLNK(file->mode)) {
 659                         if (!ACL_READY(*sxp))
 660                                 get_acl(fnamecmp, sxp);
 661                         if (set_acl(NULL, file, sxp) == 0)
 662                                 iflags |= ITEM_REPORT_ACL;
 663                 }
 664 #endif
 665 #ifdef SUPPORT_XATTRS
 666                 if (preserve_xattrs) {
 667                         if (!XATTR_READY(*sxp))
 668                                 get_xattr(fnamecmp, sxp);
 669                         if (xattr_diff(file, sxp, 1))
 670                                 iflags |= ITEM_REPORT_XATTR;
 671                 }
 672 #endif
 673         } else {
 674 #ifdef SUPPORT_XATTRS
 675                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 676                         iflags |= ITEM_REPORT_XATTR;
 677 #endif
 678                 iflags |= ITEM_IS_NEW;
 679         }
 680
 681         iflags &= 0xffff;
 682         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || verbose > 1
 683           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 684                 if (protocol_version >= 29) {
 685                         if (ndx >= 0)
 686                                 write_ndx(sock_f_out, ndx);
 687                         write_shortint(sock_f_out, iflags);
 688                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 689                                 write_byte(sock_f_out, fnamecmp_type);
 690                         if (iflags & ITEM_XNAME_FOLLOWS)
 691                                 write_vstring(sock_f_out, xname, strlen(xname));
 692 #ifdef SUPPORT_XATTRS
 693                         if (iflags & ITEM_REPORT_XATTR && !dry_run)
 694                                 send_xattr_request(NULL, file, sock_f_out);
 695 #endif
 696                 } else if (ndx >= 0) {
 697                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 698                         log_item(code, file, &stats, iflags, xname);
 699                 }
 700         }
 701 }
 702
 703
 704 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 705 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 706 {
 707         if (st->st_size != F_LENGTH(file))
 708                 return 0;
 709
 710         /* if always checksum is set then we use the checksum instead
 711            of the file time to determine whether to sync */
 712         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 713                 char sum[MAX_DIGEST_LEN];
 714                 file_checksum(fn, sum, st->st_size);
 715                 return memcmp(sum, F_SUM(file), checksum_len) == 0;
 716         }
 717
 718         if (size_only > 0)
 719                 return 1;
 720
 721         if (ignore_times)
 722                 return 0;
 723
 724         return cmp_time(st->st_mtime, file->modtime) == 0;
 725 }
 726
 727
 728 /*
 729  * set (initialize) the size entries in the per-file sum_struct
 730  * calculating dynamic block and checksum sizes.
 731  *
 732  * This is only called from generate_and_send_sums() but is a separate
 733  * function to encapsulate the logic.
 734  *
 735  * The block size is a rounded square root of file length.
 736  *
 737  * The checksum size is determined according to:
 738  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 739  * provided by Donovan Baarda which gives a probability of rsync
 740  * algorithm corrupting data and falling back using the whole md4
 741  * checksums.
 742  *
 743  * This might be made one of several selectable heuristics.
 744  */
 745 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 746 {
 747         int32 blength;
 748         int s2length;
 749
 750         if (block_size)
 751                 blength = block_size;
 752         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 753                 blength = BLOCK_SIZE;
 754         else {
 755                 int32 c;
 756                 int64 l;
 757                 int cnt;
 758                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 759                 if (cnt >= 31 || c >= MAX_BLOCK_SIZE)
 760                         blength = MAX_BLOCK_SIZE;
 761                 else {
 762                     blength = 0;
 763                     do {
 764                             blength |= c;
 765                             if (len < (int64)blength * blength)
 766                                     blength &= ~c;
 767                             c >>= 1;
 768                     } while (c >= 8);   /* round to multiple of 8 */
 769                     blength = MAX(blength, BLOCK_SIZE);
 770                 }
 771         }
 772
 773         if (protocol_version < 27) {
 774                 s2length = csum_length;
 775         } else if (csum_length == SUM_LENGTH) {
 776                 s2length = SUM_LENGTH;
 777         } else {
 778                 int32 c;
 779                 int64 l;
 780                 int b = BLOCKSUM_BIAS;
 781                 for (l = len; l >>= 1; b += 2) {}
 782                 for (c = blength; (c >>= 1) && b; b--) {}
 783                 /* add a bit, subtract rollsum, round up. */
 784                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 785                 s2length = MAX(s2length, csum_length);
 786                 s2length = MIN(s2length, SUM_LENGTH);
 787         }
 788
 789         sum->flength    = len;
 790         sum->blength    = blength;
 791         sum->s2length   = s2length;
 792         sum->remainder  = (int32)(len % blength);
 793         sum->count      = (int32)(len / blength) + (sum->remainder != 0);
 794
 795         if (sum->count && verbose > 2) {
 796                 rprintf(FINFO,
 797                         "count=%.0f rem=%ld blength=%ld s2length=%d flength=%.0f\n",
 798                         (double)sum->count, (long)sum->remainder, (long)sum->blength,
 799                         sum->s2length, (double)sum->flength);
 800         }
 801 }
 802
 803
 804 /*
 805  * Generate and send a stream of signatures/checksums that describe a buffer
 806  *
 807  * Generate approximately one checksum every block_len bytes.
 808  */
 809 static void generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 810 {
 811         int32 i;
 812         struct map_struct *mapbuf;
 813         struct sum_struct sum;
 814         OFF_T offset = 0;
 815
 816         sum_sizes_sqroot(&sum, len);
 817         write_sum_head(f_out, &sum);
 818
 819         if (append_mode > 0 && f_copy < 0)
 820                 return;
 821
 822         if (len > 0)
 823                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 824         else
 825                 mapbuf = NULL;
 826
 827         for (i = 0; i < sum.count; i++) {
 828                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 829                 char *map = map_ptr(mapbuf, offset, n1);
 830                 char sum2[SUM_LENGTH];
 831                 uint32 sum1;
 832
 833                 len -= n1;
 834                 offset += n1;
 835
 836                 if (f_copy >= 0) {
 837                         full_write(f_copy, map, n1);
 838                         if (append_mode > 0)
 839                                 continue;
 840                 }
 841
 842                 sum1 = get_checksum1(map, n1);
 843                 get_checksum2(map, n1, sum2);
 844
 845                 if (verbose > 3) {
 846                         rprintf(FINFO,
 847                                 "chunk[%.0f] offset=%.0f len=%ld sum1=%08lx\n",
 848                                 (double)i, (double)offset - n1, (long)n1,
 849                                 (unsigned long)sum1);
 850                 }
 851                 write_int(f_out, sum1);
 852                 write_buf(f_out, sum2, sum.s2length);
 853         }
 854
 855         if (mapbuf)
 856                 unmap_file(mapbuf);
 857 }
 858
 859
 860 /* Try to find a filename in the same dir as "fname" with a similar name. */
 861 static int find_fuzzy(struct file_struct *file, struct file_list *dirlist)
 862 {
 863         int fname_len, fname_suf_len;
 864         const char *fname_suf, *fname = file->basename;
 865         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 866         int j, lowest_j = -1;
 867
 868         fname_len = strlen(fname);
 869         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 870
 871         for (j = 0; j < dirlist->used; j++) {
 872                 struct file_struct *fp = dirlist->files[j];
 873                 const char *suf, *name;
 874                 int len, suf_len;
 875                 uint32 dist;
 876
 877                 if (!S_ISREG(fp->mode) || !F_LENGTH(fp)
 878                  || fp->flags & FLAG_FILE_SENT)
 879                         continue;
 880
 881                 name = fp->basename;
 882
 883                 if (F_LENGTH(fp) == F_LENGTH(file)
 884                     && cmp_time(fp->modtime, file->modtime) == 0) {
 885                         if (verbose > 4) {
 886                                 rprintf(FINFO,
 887                                         "fuzzy size/modtime match for %s\n",
 888                                         name);
 889                         }
 890                         return j;
 891                 }
 892
 893                 len = strlen(name);
 894                 suf = find_filename_suffix(name, len, &suf_len);
 895
 896                 dist = fuzzy_distance(name, len, fname, fname_len);
 897                 /* Add some extra weight to how well the suffixes match. */
 898                 dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len)
 899                       * 10;
 900                 if (verbose > 4) {
 901                         rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 902                                 name, (int)(dist>>16), (int)(dist&0xFFFF));
 903                 }
 904                 if (dist <= lowest_dist) {
 905                         lowest_dist = dist;
 906                         lowest_j = j;
 907                 }
 908         }
 909
 910         return lowest_j;
 911 }
 912
 913 /* Copy a file found in our --copy-dest handling. */
 914 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 915 {
 916         char buf[MAXPATHLEN];
 917         const char *copy_to, *partialptr;
 918         int ok, fd_w;
 919
 920         if (inplace) {
 921                 /* Let copy_file open the destination in place. */
 922                 fd_w = -1;
 923                 copy_to = dest;
 924         } else {
 925                 fd_w = open_tmpfile(buf, dest, file);
 926                 if (fd_w < 0)
 927                         return -1;
 928                 copy_to = buf;
 929         }
 930         cleanup_set(copy_to, NULL, NULL, -1, -1);
 931         if (copy_file(src, copy_to, fd_w, file->mode, 0) < 0) {
 932                 if (verbose) {
 933                         rsyserr(FINFO, errno, "copy_file %s => %s",
 934                                 full_fname(src), copy_to);
 935                 }
 936                 /* Try to clean up. */
 937                 unlink(copy_to);
 938                 cleanup_disable();
 939                 return -1;
 940         }
 941         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 942         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 943         cleanup_disable();
 944         return ok ? 0 : -1;
 945 }
 946
 947 /* This is only called for regular files.  We return -2 if we've finished
 948  * handling the file, -1 if no dest-linking occurred, or a non-negative
 949  * value if we found an alternate basis file. */
 950 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 951                          char *cmpbuf, stat_x *sxp, int itemizing,
 952                          enum logcode code)
 953 {
 954         int best_match = -1;
 955         int match_level = 0;
 956         int j = 0;
 957
 958         do {
 959                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 960                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 961                         continue;
 962                 switch (match_level) {
 963                 case 0:
 964                         best_match = j;
 965                         match_level = 1;
 966                         /* FALL THROUGH */
 967                 case 1:
 968                         if (!unchanged_file(cmpbuf, file, &sxp->st))
 969                                 continue;
 970                         best_match = j;
 971                         match_level = 2;
 972                         /* FALL THROUGH */
 973                 case 2:
 974                         if (!unchanged_attrs(cmpbuf, file, sxp))
 975                                 continue;
 976                         best_match = j;
 977                         match_level = 3;
 978                         break;
 979                 }
 980                 break;
 981         } while (basis_dir[++j] != NULL);
 982
 983         if (!match_level)
 984                 return -1;
 985
 986         if (j != best_match) {
 987                 j = best_match;
 988                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 989                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 990                         return -1;
 991         }
 992
 993         if (match_level == 3 && !copy_dest) {
 994 #ifdef SUPPORT_HARD_LINKS
 995                 if (link_dest) {
 996                         if (!hard_link_one(file, fname, cmpbuf, 1))
 997                                 goto try_a_copy;
 998                         if (preserve_hard_links && F_IS_HLINKED(file))
 999                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
1000                         if (!maybe_ATTRS_REPORT && (verbose > 1 || stdout_format_has_i > 1)) {
1001                                 itemize(cmpbuf, file, ndx, 1, sxp,
1002                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
1003                                         0, "");
1004                         }
1005                 } else
1006 #endif
1007                 if (itemizing)
1008                         itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
1009                 if (verbose > 1 && maybe_ATTRS_REPORT)
1010                         rprintf(FCLIENT, "%s is uptodate\n", fname);
1011                 return -2;
1012         }
1013
1014         if (match_level >= 2) {
1015 #ifdef SUPPORT_HARD_LINKS
1016           try_a_copy: /* Copy the file locally. */
1017 #endif
1018                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0)
1019                         return -1;
1020                 if (itemizing)
1021                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
1022                 if (maybe_ATTRS_REPORT
1023                  && ((!itemizing && verbose && match_level == 2)
1024                   || (verbose > 1 && match_level == 3))) {
1025                         code = match_level == 3 ? FCLIENT : FINFO;
1026                         rprintf(code, "%s%s\n", fname,
1027                                 match_level == 3 ? " is uptodate" : "");
1028                 }
1029 #ifdef SUPPORT_HARD_LINKS
1030                 if (preserve_hard_links && F_IS_HLINKED(file))
1031                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
1032 #endif
1033                 return -2;
1034         }
1035
1036         return FNAMECMP_BASIS_DIR_LOW + j;
1037 }
1038
1039 /* This is only called for non-regular files.  We return -2 if we've finished
1040  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1041  * value if we found an alternate basis file. */
1042 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1043                          char *cmpbuf, stat_x *sxp, int itemizing,
1044                          enum logcode code)
1045 {
1046         char lnk[MAXPATHLEN];
1047         int best_match = -1;
1048         int match_level = 0;
1049         enum nonregtype type;
1050         uint32 *devp;
1051         int len, j = 0;
1052
1053 #ifndef SUPPORT_LINKS
1054         if (S_ISLNK(file->mode))
1055                 return -1;
1056 #endif
1057         if (S_ISDIR(file->mode)) {
1058                 type = TYPE_DIR;
1059         } else if (IS_SPECIAL(file->mode))
1060                 type = TYPE_SPECIAL;
1061         else if (IS_DEVICE(file->mode))
1062                 type = TYPE_DEVICE;
1063 #ifdef SUPPORT_LINKS
1064         else if (S_ISLNK(file->mode))
1065                 type = TYPE_SYMLINK;
1066 #endif
1067         else {
1068                 rprintf(FERROR,
1069                         "internal: try_dests_non() called with invalid mode (%o)\n",
1070                         (int)file->mode);
1071                 exit_cleanup(RERR_UNSUPPORTED);
1072         }
1073
1074         do {
1075                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1076                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1077                         continue;
1078                 switch (type) {
1079                 case TYPE_DIR:
1080                         if (!S_ISDIR(sxp->st.st_mode))
1081                                 continue;
1082                         break;
1083                 case TYPE_SPECIAL:
1084                         if (!IS_SPECIAL(sxp->st.st_mode))
1085                                 continue;
1086                         break;
1087                 case TYPE_DEVICE:
1088                         if (!IS_DEVICE(sxp->st.st_mode))
1089                                 continue;
1090                         break;
1091 #ifdef SUPPORT_LINKS
1092                 case TYPE_SYMLINK:
1093                         if (!S_ISLNK(sxp->st.st_mode))
1094                                 continue;
1095                         break;
1096 #endif
1097                 }
1098                 if (match_level < 1) {
1099                         match_level = 1;
1100                         best_match = j;
1101                 }
1102                 switch (type) {
1103                 case TYPE_DIR:
1104                         break;
1105                 case TYPE_SPECIAL:
1106                 case TYPE_DEVICE:
1107                         devp = F_RDEV_P(file);
1108                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1109                                 continue;
1110                         break;
1111 #ifdef SUPPORT_LINKS
1112                 case TYPE_SYMLINK:
1113                         if ((len = readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1114                                 continue;
1115                         lnk[len] = '\0';
1116                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1117                                 continue;
1118                         break;
1119 #endif
1120                 }
1121                 if (match_level < 2) {
1122                         match_level = 2;
1123                         best_match = j;
1124                 }
1125                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1126                         match_level = 3;
1127                         best_match = j;
1128                         break;
1129                 }
1130         } while (basis_dir[++j] != NULL);
1131
1132         if (!match_level)
1133                 return -1;
1134
1135         if (j != best_match) {
1136                 j = best_match;
1137                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1138                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1139                         return -1;
1140         }
1141
1142         if (match_level == 3) {
1143 #ifdef SUPPORT_HARD_LINKS
1144                 if (link_dest
1145 #ifndef CAN_HARDLINK_SYMLINK
1146                  && !S_ISLNK(file->mode)
1147 #endif
1148 #ifndef CAN_HARDLINK_SPECIAL
1149                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1150 #endif
1151                  && !S_ISDIR(file->mode)) {
1152                         if (do_link(cmpbuf, fname) < 0) {
1153                                 rsyserr(FERROR_XFER, errno,
1154                                         "failed to hard-link %s with %s",
1155                                         cmpbuf, fname);
1156                                 return j;
1157                         }
1158                         if (preserve_hard_links && F_IS_HLINKED(file))
1159                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1160                 } else
1161 #endif
1162                         match_level = 2;
1163                 if (itemizing && stdout_format_has_i
1164                  && (verbose > 1 || stdout_format_has_i > 1)) {
1165                         int chg = compare_dest && type != TYPE_DIR ? 0
1166                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1167                         char *lp = match_level == 3 ? "" : NULL;
1168                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1169                 }
1170                 if (verbose > 1 && maybe_ATTRS_REPORT) {
1171                         rprintf(FCLIENT, "%s%s is uptodate\n",
1172                                 fname, type == TYPE_DIR ? "/" : "");
1173                 }
1174                 return -2;
1175         }
1176
1177         return j;
1178 }
1179
1180 static void list_file_entry(struct file_struct *f)
1181 {
1182         char permbuf[PERMSTRING_SIZE];
1183         double len;
1184
1185         if (!F_IS_ACTIVE(f)) {
1186                 /* this can happen if duplicate names were removed */
1187                 return;
1188         }
1189
1190         permstring(permbuf, f->mode);
1191         len = F_LENGTH(f);
1192
1193         /* TODO: indicate '+' if the entry has an ACL. */
1194
1195 #ifdef SUPPORT_LINKS
1196         if (preserve_links && S_ISLNK(f->mode)) {
1197                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
1198                         permbuf, len, timestring(f->modtime),
1199                         f_name(f, NULL), F_SYMLINK(f));
1200         } else
1201 #endif
1202         {
1203                 rprintf(FINFO, "%s %11.0f %s %s\n",
1204                         permbuf, len, timestring(f->modtime),
1205                         f_name(f, NULL));
1206         }
1207 }
1208
1209 static int phase = 0;
1210 static int dflt_perms;
1211
1212 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1213  * make sure it exists, and has the right permissions/timestamp info.  For
1214  * all other non-regular files (symlinks, etc.) we create them here.  For
1215  * regular files that have changed, we try to find a basis file and then
1216  * start sending checksums.  The ndx is the file's unique index value.
1217  *
1218  * When fname is non-null, it must point to a MAXPATHLEN buffer!
1219  *
1220  * Note that f_out is set to -1 when doing final directory-permission and
1221  * modification-time repair. */
1222 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1223                            int itemizing, enum logcode code, int f_out)
1224 {
1225         static int missing_below = -1, excluded_below = -1;
1226         static const char *parent_dirname = "";
1227         static struct file_struct *missing_dir = NULL, *excluded_dir = NULL;
1228         static struct file_list *fuzzy_dirlist = NULL;
1229         static int need_fuzzy_dirlist = 0;
1230         struct file_struct *fuzzy_file = NULL;
1231         int fd = -1, f_copy = -1;
1232         stat_x sx, real_sx;
1233         STRUCT_STAT partial_st;
1234         struct file_struct *back_file = NULL;
1235         int statret, real_ret, stat_errno;
1236         char *fnamecmp, *partialptr, *backupptr = NULL;
1237         char fnamecmpbuf[MAXPATHLEN];
1238         uchar fnamecmp_type;
1239         int implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
1240         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1241         int is_dir = !S_ISDIR(file->mode) ? 0
1242                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1243                    : 1;
1244
1245         if (verbose > 2)
1246                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1247
1248         if (list_only) {
1249                 if (is_dir < 0
1250                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1251                         return;
1252                 list_file_entry(file);
1253                 return;
1254         }
1255
1256         if (server_filter_list.head) {
1257                 int filtered = check_filter(&server_filter_list, fname, is_dir) < 0;
1258                 if (is_dir < 0 && filtered)
1259                         return;
1260                 if (excluded_below >= 0) {
1261                         if (F_DEPTH(file) > excluded_below
1262                          && (!implied_dirs_are_missing || f_name_has_prefix(file, excluded_dir)))
1263                                 goto skipping;
1264                         excluded_below = -1;
1265                 }
1266                 if (filtered) {
1267                         if (is_dir) {
1268                                 excluded_below = F_DEPTH(file);
1269                                 excluded_dir = file;
1270                         }
1271                   skipping:
1272                         rprintf(FERROR_XFER,
1273                                 "skipping daemon-excluded file \"%s\"\n",
1274                                 fname);
1275                         return;
1276                 }
1277         }
1278
1279         if (missing_below >= 0) {
1280                 if (F_DEPTH(file) <= missing_below
1281                  || (implied_dirs_are_missing && !f_name_has_prefix(file, missing_dir))) {
1282                         if (dry_run)
1283                                 dry_run--;
1284                         missing_below = -1;
1285                 } else if (!dry_run) {
1286                         if (is_dir)
1287                                 file->flags |= FLAG_MISSING_DIR;
1288                         return;
1289                 }
1290         }
1291 #ifdef SUPPORT_ACLS
1292         sx.acc_acl = sx.def_acl = NULL;
1293 #endif
1294 #ifdef SUPPORT_XATTRS
1295         sx.xattr = NULL;
1296 #endif
1297         if (dry_run > 1) {
1298                 if (fuzzy_dirlist) {
1299                         flist_free(fuzzy_dirlist);
1300                         fuzzy_dirlist = NULL;
1301                 }
1302                 parent_dirname = "";
1303                 statret = -1;
1304                 stat_errno = ENOENT;
1305         } else {
1306                 const char *dn = file->dirname ? file->dirname : ".";
1307                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1308                         if (relative_paths && !implied_dirs
1309                          && do_stat(dn, &sx.st) < 0
1310                          && create_directory_path(fname) < 0) {
1311                                 rsyserr(FERROR_XFER, errno,
1312                                         "recv_generator: mkdir %s failed",
1313                                         full_fname(dn));
1314                         }
1315                         if (fuzzy_dirlist) {
1316                                 flist_free(fuzzy_dirlist);
1317                                 fuzzy_dirlist = NULL;
1318                         }
1319                         if (fuzzy_basis)
1320                                 need_fuzzy_dirlist = 1;
1321 #ifdef SUPPORT_ACLS
1322                         if (!preserve_perms)
1323                                 dflt_perms = default_perms_for_dir(dn);
1324 #endif
1325                 }
1326                 parent_dirname = dn;
1327
1328                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1329                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1330                         fuzzy_dirlist = get_dirlist(fnamecmpbuf, -1, 1);
1331                         need_fuzzy_dirlist = 0;
1332                 }
1333
1334                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1335                 stat_errno = errno;
1336         }
1337
1338         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1339                 if (is_dir) {
1340                         if (is_dir < 0)
1341                                 return;
1342                         if (missing_below < 0) {
1343                                 if (dry_run)
1344                                         dry_run++;
1345                                 missing_below = F_DEPTH(file);
1346                                 missing_dir = file;
1347                         }
1348                         file->flags |= FLAG_MISSING_DIR;
1349                 }
1350                 if (verbose > 1) {
1351                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1352                                 is_dir ? "directory" : "file", fname);
1353                 }
1354                 return;
1355         }
1356
1357         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1358          && !am_root && sx.st.st_uid == our_uid)
1359                 del_opts |= DEL_NO_UID_WRITE;
1360
1361         if (ignore_existing > 0 && statret == 0
1362          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1363                 if (verbose > 1 && is_dir >= 0)
1364                         rprintf(FINFO, "%s exists\n", fname);
1365                 goto cleanup;
1366         }
1367
1368         if (is_dir) {
1369                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1370                         goto cleanup;
1371                 if (is_dir < 0) {
1372                         /* In inc_recurse mode we want to make sure any missing
1373                          * directories get created while we're still processing
1374                          * the parent dir (which allows us to touch the parent
1375                          * dir's mtime right away).  We will handle the dir in
1376                          * full later (right before we handle its contents). */
1377                         if (statret == 0
1378                          && (S_ISDIR(sx.st.st_mode)
1379                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1380                                 goto cleanup; /* Any errors get reported later. */
1381                         if (do_mkdir(fname, file->mode & 0700) == 0)
1382                                 file->flags |= FLAG_DIR_CREATED;
1383                         goto cleanup;
1384                 }
1385                 /* The file to be received is a directory, so we need
1386                  * to prepare appropriately.  If there is already a
1387                  * file of that name and it is *not* a directory, then
1388                  * we need to delete it.  If it doesn't exist, then
1389                  * (perhaps recursively) create it. */
1390                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1391                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1392                                 goto skipping_dir_contents;
1393                         statret = -1;
1394                 }
1395                 if (dry_run && statret != 0 && missing_below < 0) {
1396                         missing_below = F_DEPTH(file);
1397                         missing_dir = file;
1398                         dry_run++;
1399                 }
1400                 real_ret = statret;
1401                 real_sx = sx;
1402                 if (file->flags & FLAG_DIR_CREATED)
1403                         statret = -1;
1404                 if (!preserve_perms) { /* See comment in non-dir code below. */
1405                         file->mode = dest_mode(file->mode, sx.st.st_mode,
1406                                                dflt_perms, statret == 0);
1407                 }
1408                 if (statret != 0 && basis_dir[0] != NULL) {
1409                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1410                                               itemizing, code);
1411                         if (j == -2) {
1412                                 itemizing = 0;
1413                                 code = FNONE;
1414                         } else if (j >= 0)
1415                                 statret = 1;
1416                 }
1417                 if (itemizing && f_out != -1) {
1418                         itemize(fname, file, ndx, statret, &sx,
1419                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1420                 }
1421                 if (real_ret != 0 && do_mkdir(fname,file->mode) < 0 && errno != EEXIST) {
1422                         if (!relative_paths || errno != ENOENT
1423                             || create_directory_path(fname) < 0
1424                             || (do_mkdir(fname, file->mode) < 0 && errno != EEXIST)) {
1425                                 rsyserr(FERROR_XFER, errno,
1426                                         "recv_generator: mkdir %s failed",
1427                                         full_fname(fname));
1428                           skipping_dir_contents:
1429                                 rprintf(FERROR,
1430                                     "*** Skipping any contents from this failed directory ***\n");
1431                                 missing_below = F_DEPTH(file);
1432                                 missing_dir = file;
1433                                 file->flags |= FLAG_MISSING_DIR;
1434                                 goto cleanup;
1435                         }
1436                 }
1437                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1438                     && verbose && code != FNONE && f_out != -1)
1439                         rprintf(code, "%s/\n", fname);
1440
1441                 /* We need to ensure that the dirs in the transfer have writable
1442                  * permissions during the time we are putting files within them.
1443                  * This is then fixed after the transfer is done. */
1444 #ifdef HAVE_CHMOD
1445                 if (!am_root && !(file->mode & S_IWUSR) && dir_tweaking) {
1446                         mode_t mode = file->mode | S_IWUSR;
1447                         if (do_chmod(fname, mode) < 0) {
1448                                 rsyserr(FERROR_XFER, errno,
1449                                         "failed to modify permissions on %s",
1450                                         full_fname(fname));
1451                         }
1452                         need_retouch_dir_perms = 1;
1453                 }
1454 #endif
1455
1456                 if (real_ret != 0 && one_file_system)
1457                         real_sx.st.st_dev = filesystem_dev;
1458                 if (inc_recurse) {
1459                         if (one_file_system) {
1460                                 uint32 *devp = F_DIR_DEV_P(file);
1461                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1462                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1463                         }
1464                 }
1465                 else if (delete_during && f_out != -1 && !phase && dry_run < 2
1466                     && (file->flags & FLAG_CONTENT_DIR))
1467                         delete_in_dir(fname, file, &real_sx.st.st_dev);
1468                 goto cleanup;
1469         }
1470
1471         /* If we're not preserving permissions, change the file-list's
1472          * mode based on the local permissions and some heuristics. */
1473         if (!preserve_perms) {
1474                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1475                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms,
1476                                        exists);
1477         }
1478
1479 #ifdef SUPPORT_HARD_LINKS
1480         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1481          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1482                 goto cleanup;
1483 #endif
1484
1485         if (preserve_links && S_ISLNK(file->mode)) {
1486 #ifdef SUPPORT_LINKS
1487                 const char *sl = F_SYMLINK(file);
1488                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1489                         if (verbose) {
1490                                 if (solo_file)
1491                                         fname = f_name(file, NULL);
1492                                 rprintf(FINFO,
1493                                         "ignoring unsafe symlink %s -> \"%s\"\n",
1494                                         full_fname(fname), sl);
1495                         }
1496                         return;
1497                 }
1498                 if (statret == 0) {
1499                         char lnk[MAXPATHLEN];
1500                         int len;
1501
1502                         if (!S_ISLNK(sx.st.st_mode))
1503                                 statret = -1;
1504                         else if ((len = readlink(fname, lnk, MAXPATHLEN-1)) > 0
1505                               && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1506                                 /* The link is pointing to the right place. */
1507                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1508                                 if (itemizing)
1509                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1510 #if defined SUPPORT_HARD_LINKS && defined CAN_HARDLINK_SYMLINK
1511                                 if (preserve_hard_links && F_IS_HLINKED(file))
1512                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1513 #endif
1514                                 if (remove_source_files == 1)
1515                                         goto return_with_success;
1516                                 goto cleanup;
1517                         }
1518                         /* Not the right symlink (or not a symlink), so
1519                          * delete it. */
1520                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_SYMLINK) != 0)
1521                                 goto cleanup;
1522                 } else if (basis_dir[0] != NULL) {
1523                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1524                                               itemizing, code);
1525                         if (j == -2) {
1526 #ifndef CAN_HARDLINK_SYMLINK
1527                                 if (link_dest) {
1528                                         /* Resort to --copy-dest behavior. */
1529                                 } else
1530 #endif
1531                                 if (!copy_dest)
1532                                         goto cleanup;
1533                                 itemizing = 0;
1534                                 code = FNONE;
1535                         } else if (j >= 0)
1536                                 statret = 1;
1537                 }
1538 #ifdef SUPPORT_HARD_LINKS
1539                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1540                         cur_flist->in_progress++;
1541                         goto cleanup;
1542                 }
1543 #endif
1544                 if (do_symlink(sl, fname) != 0) {
1545                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
1546                                 full_fname(fname), sl);
1547                 } else {
1548                         set_file_attrs(fname, file, NULL, NULL, 0);
1549                         if (itemizing) {
1550                                 itemize(fname, file, ndx, statret, &sx,
1551                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1552                         }
1553                         if (code != FNONE && verbose)
1554                                 rprintf(code, "%s -> %s\n", fname, sl);
1555 #ifdef SUPPORT_HARD_LINKS
1556                         if (preserve_hard_links && F_IS_HLINKED(file))
1557                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1558 #endif
1559                         /* This does not check remove_source_files == 1
1560                          * because this is one of the items that the old
1561                          * --remove-sent-files option would remove. */
1562                         if (remove_source_files)
1563                                 goto return_with_success;
1564                 }
1565 #endif
1566                 goto cleanup;
1567         }
1568
1569         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1570          || (preserve_specials && IS_SPECIAL(file->mode))) {
1571                 uint32 *devp = F_RDEV_P(file);
1572                 dev_t rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1573                 if (statret == 0) {
1574                         int del_for_flag;
1575                         if (IS_DEVICE(file->mode)) {
1576                                 if (!IS_DEVICE(sx.st.st_mode))
1577                                         statret = -1;
1578                                 del_for_flag = DEL_FOR_DEVICE;
1579                         } else {
1580                                 if (!IS_SPECIAL(sx.st.st_mode))
1581                                         statret = -1;
1582                                 del_for_flag = DEL_FOR_SPECIAL;
1583                         }
1584                         if (statret == 0
1585                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1586                          && sx.st.st_rdev == rdev) {
1587                                 /* The device or special file is identical. */
1588                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1589                                 if (itemizing)
1590                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1591 #ifdef SUPPORT_HARD_LINKS
1592                                 if (preserve_hard_links && F_IS_HLINKED(file))
1593                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1594 #endif
1595                                 if (remove_source_files == 1)
1596                                         goto return_with_success;
1597                                 goto cleanup;
1598                         }
1599                         if (delete_item(fname, sx.st.st_mode, del_opts | del_for_flag) != 0)
1600                                 goto cleanup;
1601                 } else if (basis_dir[0] != NULL) {
1602                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx,
1603                                               itemizing, code);
1604                         if (j == -2) {
1605 #ifndef CAN_HARDLINK_SPECIAL
1606                                 if (link_dest) {
1607                                         /* Resort to --copy-dest behavior. */
1608                                 } else
1609 #endif
1610                                 if (!copy_dest)
1611                                         goto cleanup;
1612                                 itemizing = 0;
1613                                 code = FNONE;
1614                         } else if (j >= 0)
1615                                 statret = 1;
1616                 }
1617 #ifdef SUPPORT_HARD_LINKS
1618                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1619                         cur_flist->in_progress++;
1620                         goto cleanup;
1621                 }
1622 #endif
1623                 if (verbose > 2) {
1624                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1625                                 fname, (int)file->mode,
1626                                 (long)major(rdev), (long)minor(rdev));
1627                 }
1628                 if (do_mknod(fname, file->mode, rdev) < 0) {
1629                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
1630                                 full_fname(fname));
1631                 } else {
1632                         set_file_attrs(fname, file, NULL, NULL, 0);
1633                         if (itemizing) {
1634                                 itemize(fname, file, ndx, statret, &sx,
1635                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1636                         }
1637                         if (code != FNONE && verbose)
1638                                 rprintf(code, "%s\n", fname);
1639 #ifdef SUPPORT_HARD_LINKS
1640                         if (preserve_hard_links && F_IS_HLINKED(file))
1641                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1642 #endif
1643                         if (remove_source_files == 1)
1644                                 goto return_with_success;
1645                 }
1646                 goto cleanup;
1647         }
1648
1649         if (!S_ISREG(file->mode)) {
1650                 if (solo_file)
1651                         fname = f_name(file, NULL);
1652                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1653                 goto cleanup;
1654         }
1655
1656         if (max_size > 0 && F_LENGTH(file) > max_size) {
1657                 if (verbose > 1) {
1658                         if (solo_file)
1659                                 fname = f_name(file, NULL);
1660                         rprintf(FINFO, "%s is over max-size\n", fname);
1661                 }
1662                 goto cleanup;
1663         }
1664         if (min_size > 0 && F_LENGTH(file) < min_size) {
1665                 if (verbose > 1) {
1666                         if (solo_file)
1667                                 fname = f_name(file, NULL);
1668                         rprintf(FINFO, "%s is under min-size\n", fname);
1669                 }
1670                 goto cleanup;
1671         }
1672
1673         if (update_only > 0 && statret == 0
1674             && cmp_time(sx.st.st_mtime, file->modtime) > 0) {
1675                 if (verbose > 1)
1676                         rprintf(FINFO, "%s is newer\n", fname);
1677                 goto cleanup;
1678         }
1679
1680         fnamecmp = fname;
1681         fnamecmp_type = FNAMECMP_FNAME;
1682
1683         if (statret == 0 && !S_ISREG(sx.st.st_mode)) {
1684                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1685                         goto cleanup;
1686                 statret = -1;
1687                 stat_errno = ENOENT;
1688         }
1689
1690         if (statret != 0 && basis_dir[0] != NULL) {
1691                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx,
1692                                       itemizing, code);
1693                 if (j == -2) {
1694                         if (remove_source_files == 1)
1695                                 goto return_with_success;
1696                         goto cleanup;
1697                 }
1698                 if (j >= 0) {
1699                         fnamecmp = fnamecmpbuf;
1700                         fnamecmp_type = j;
1701                         statret = 0;
1702                 }
1703         }
1704
1705         real_ret = statret;
1706         real_sx = sx;
1707
1708         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1709             && link_stat(partialptr, &partial_st, 0) == 0
1710             && S_ISREG(partial_st.st_mode)) {
1711                 if (statret != 0)
1712                         goto prepare_to_open;
1713         } else
1714                 partialptr = NULL;
1715
1716         if (statret != 0 && fuzzy_dirlist && dry_run <= 1) {
1717                 int j = find_fuzzy(file, fuzzy_dirlist);
1718                 if (j >= 0) {
1719                         fuzzy_file = fuzzy_dirlist->files[j];
1720                         f_name(fuzzy_file, fnamecmpbuf);
1721                         if (verbose > 2) {
1722                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1723                                         fname, fnamecmpbuf);
1724                         }
1725                         sx.st.st_size = F_LENGTH(fuzzy_file);
1726                         statret = 0;
1727                         fnamecmp = fnamecmpbuf;
1728                         fnamecmp_type = FNAMECMP_FUZZY;
1729                 }
1730         }
1731
1732         if (statret != 0) {
1733 #ifdef SUPPORT_HARD_LINKS
1734                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1735                         cur_flist->in_progress++;
1736                         goto cleanup;
1737                 }
1738 #endif
1739                 if (stat_errno == ENOENT)
1740                         goto notify_others;
1741                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1742                         full_fname(fname));
1743                 goto cleanup;
1744         }
1745
1746         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1747                 ;
1748         else if (fnamecmp_type == FNAMECMP_FUZZY)
1749                 ;
1750         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1751                 if (partialptr) {
1752                         do_unlink(partialptr);
1753                         handle_partial_dir(partialptr, PDIR_DELETE);
1754                 }
1755                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1756                 if (itemizing)
1757                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1758 #ifdef SUPPORT_HARD_LINKS
1759                 if (preserve_hard_links && F_IS_HLINKED(file))
1760                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1761 #endif
1762                 if (remove_source_files != 1)
1763                         goto cleanup;
1764           return_with_success:
1765                 if (!dry_run)
1766                         send_msg_int(MSG_SUCCESS, ndx);
1767                 goto cleanup;
1768         }
1769
1770         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1771                 goto cleanup;
1772         }
1773
1774   prepare_to_open:
1775         if (partialptr) {
1776                 sx.st = partial_st;
1777                 fnamecmp = partialptr;
1778                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1779                 statret = 0;
1780         }
1781
1782         if (!do_xfers)
1783                 goto notify_others;
1784
1785         if (read_batch || whole_file) {
1786                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1787                         if (!(backupptr = get_backup_name(fname)))
1788                                 goto cleanup;
1789                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1790                                 goto pretend_missing;
1791                         if (copy_file(fname, backupptr, -1, back_file->mode, 1) < 0) {
1792                                 unmake_file(back_file);
1793                                 back_file = NULL;
1794                                 goto cleanup;
1795                         }
1796                 }
1797                 goto notify_others;
1798         }
1799
1800         if (fuzzy_dirlist) {
1801                 int j = flist_find(fuzzy_dirlist, file);
1802                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1803                         fuzzy_dirlist->files[j]->flags |= FLAG_FILE_SENT;
1804         }
1805
1806         /* open the file */
1807         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1808                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1809                         full_fname(fnamecmp));
1810           pretend_missing:
1811                 /* pretend the file didn't exist */
1812 #ifdef SUPPORT_HARD_LINKS
1813                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1814                         cur_flist->in_progress++;
1815                         goto cleanup;
1816                 }
1817 #endif
1818                 statret = real_ret = -1;
1819                 goto notify_others;
1820         }
1821
1822         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1823                 if (!(backupptr = get_backup_name(fname))) {
1824                         close(fd);
1825                         goto cleanup;
1826                 }
1827                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1828                         close(fd);
1829                         goto pretend_missing;
1830                 }
1831                 if (robust_unlink(backupptr) && errno != ENOENT) {
1832                         rsyserr(FERROR_XFER, errno, "unlink %s",
1833                                 full_fname(backupptr));
1834                         unmake_file(back_file);
1835                         back_file = NULL;
1836                         close(fd);
1837                         goto cleanup;
1838                 }
1839                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0
1840                  && (errno != ENOENT || make_bak_dir(backupptr) < 0
1841                   || (f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0)) {
1842                         rsyserr(FERROR_XFER, errno, "open %s",
1843                                 full_fname(backupptr));
1844                         unmake_file(back_file);
1845                         back_file = NULL;
1846                         close(fd);
1847                         goto cleanup;
1848                 }
1849                 fnamecmp_type = FNAMECMP_BACKUP;
1850         }
1851
1852         if (verbose > 3) {
1853                 rprintf(FINFO, "gen mapped %s of size %.0f\n",
1854                         fnamecmp, (double)sx.st.st_size);
1855         }
1856
1857         if (verbose > 2)
1858                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1859
1860   notify_others:
1861         if (remove_source_files && !delay_updates && !phase && !dry_run)
1862                 increment_active_files(ndx, itemizing, code);
1863         if (inc_recurse && !dry_run)
1864                 cur_flist->in_progress++;
1865 #ifdef SUPPORT_HARD_LINKS
1866         if (preserve_hard_links && F_IS_HLINKED(file))
1867                 file->flags |= FLAG_FILE_SENT;
1868 #endif
1869         write_ndx(f_out, ndx);
1870         if (itemizing) {
1871                 int iflags = ITEM_TRANSFER;
1872                 if (always_checksum > 0)
1873                         iflags |= ITEM_REPORT_CHANGE;
1874                 if (fnamecmp_type != FNAMECMP_FNAME)
1875                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1876                 if (fnamecmp_type == FNAMECMP_FUZZY)
1877                         iflags |= ITEM_XNAME_FOLLOWS;
1878                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1879                         fuzzy_file ? fuzzy_file->basename : NULL);
1880 #ifdef SUPPORT_ACLS
1881                 if (preserve_acls)
1882                         free_acl(&real_sx);
1883 #endif
1884 #ifdef SUPPORT_XATTRS
1885                 if (preserve_xattrs)
1886                         free_xattr(&real_sx);
1887 #endif
1888         }
1889
1890         if (!do_xfers) {
1891 #ifdef SUPPORT_HARD_LINKS
1892                 if (preserve_hard_links && F_IS_HLINKED(file))
1893                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1894 #endif
1895                 goto cleanup;
1896         }
1897         if (read_batch)
1898                 goto cleanup;
1899
1900         if (statret != 0 || whole_file)
1901                 write_sum_head(f_out, NULL);
1902         else {
1903                 generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy);
1904                 close(fd);
1905         }
1906
1907   cleanup:
1908         if (back_file) {
1909                 if (f_copy >= 0)
1910                         close(f_copy);
1911                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1912                 if (verbose > 1) {
1913                         rprintf(FINFO, "backed up %s to %s\n",
1914                                 fname, backupptr);
1915                 }
1916                 unmake_file(back_file);
1917         }
1918
1919 #ifdef SUPPORT_ACLS
1920         if (preserve_acls)
1921                 free_acl(&sx);
1922 #endif
1923 #ifdef SUPPORT_XATTRS
1924         if (preserve_xattrs)
1925                 free_xattr(&sx);
1926 #endif
1927         return;
1928 }
1929
1930 static void touch_up_dirs(struct file_list *flist, int ndx)
1931 {
1932         static int counter = 0;
1933         struct file_struct *file;
1934         char *fname;
1935         int i, start, end;
1936
1937         if (ndx < 0) {
1938                 start = 0;
1939                 end = flist->used - 1;
1940         } else
1941                 start = end = ndx;
1942
1943         /* Fix any directory permissions that were modified during the
1944          * transfer and/or re-set any tweaked modified-time values. */
1945         for (i = start; i <= end; i++, counter++) {
1946                 file = flist->files[i];
1947                 if (!S_ISDIR(file->mode)
1948                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1949                         continue;
1950                 if (verbose > 3) {
1951                         fname = f_name(file, NULL);
1952                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
1953                                 NS(fname), i);
1954                 }
1955                 if (!F_IS_ACTIVE(file) || file->flags & FLAG_MISSING_DIR
1956                  || (!need_retouch_dir_times && file->mode & S_IWUSR))
1957                         continue;
1958                 fname = f_name(file, NULL);
1959                 if (!(file->mode & S_IWUSR))
1960                         do_chmod(fname, file->mode);
1961                 if (need_retouch_dir_times) {
1962                         STRUCT_STAT st;
1963                         if (link_stat(fname, &st, 0) == 0
1964                          && cmp_time(st.st_mtime, file->modtime) != 0)
1965                                 set_modtime(fname, file->modtime, file->mode);
1966                 }
1967                 if (allowed_lull && !(counter % lull_mod))
1968                         maybe_send_keepalive();
1969                 else if (!(counter & 0xFF))
1970                         maybe_flush_socket(0);
1971         }
1972 }
1973
1974 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
1975 {
1976         struct file_struct *file;
1977         struct file_list *flist;
1978         char fbuf[MAXPATHLEN];
1979         int ndx;
1980
1981         while (1) {
1982 #ifdef SUPPORT_HARD_LINKS
1983                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
1984                         flist = flist_for_ndx(ndx);
1985                         assert(flist != NULL);
1986                         file = flist->files[ndx - flist->ndx_start];
1987                         assert(file->flags & FLAG_HLINKED);
1988                         finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
1989                         flist->in_progress--;
1990                         continue;
1991                 }
1992 #endif
1993
1994                 if (check_redo && (ndx = get_redo_num()) != -1) {
1995                         csum_length = SUM_LENGTH;
1996                         max_size = -max_size;
1997                         min_size = -min_size;
1998                         ignore_existing = -ignore_existing;
1999                         ignore_non_existing = -ignore_non_existing;
2000                         update_only = -update_only;
2001                         always_checksum = -always_checksum;
2002                         size_only = -size_only;
2003                         append_mode = -append_mode;
2004                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2005                         ignore_times++;
2006
2007                         flist = cur_flist;
2008                         cur_flist = flist_for_ndx(ndx);
2009
2010                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2011                         if (solo_file)
2012                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2013                         else
2014                                 f_name(file, fbuf);
2015                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2016                         cur_flist->to_redo--;
2017
2018                         cur_flist = flist;
2019
2020                         csum_length = SHORT_SUM_LENGTH;
2021                         max_size = -max_size;
2022                         min_size = -min_size;
2023                         ignore_existing = -ignore_existing;
2024                         ignore_non_existing = -ignore_non_existing;
2025                         update_only = -update_only;
2026                         always_checksum = -always_checksum;
2027                         size_only = -size_only;
2028                         append_mode = -append_mode;
2029                         make_backups = -make_backups;
2030                         ignore_times--;
2031                         continue;
2032                 }
2033
2034                 if (cur_flist == first_flist)
2035                         break;
2036
2037                 /* We only get here if inc_recurse is enabled. */
2038                 if (first_flist->in_progress || first_flist->to_redo)
2039                         break;
2040
2041                 if (!read_batch) {
2042                         write_ndx(sock_f_out, NDX_DONE);
2043                         maybe_flush_socket(1);
2044                 }
2045
2046                 if (delete_during == 2 || !dir_tweaking) {
2047                         /* Skip directory touch-up. */
2048                 } else if (first_flist->parent_ndx >= 0)
2049                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2050
2051                 flist_free(first_flist); /* updates first_flist */
2052         }
2053 }
2054
2055 void generate_files(int f_out, const char *local_name)
2056 {
2057         int i, ndx;
2058         char fbuf[MAXPATHLEN];
2059         int itemizing;
2060         enum logcode code;
2061         int save_do_progress = do_progress;
2062
2063         if (protocol_version >= 29) {
2064                 itemizing = 1;
2065                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2066                 code = logfile_format_has_i ? FNONE : FLOG;
2067         } else if (am_daemon) {
2068                 itemizing = logfile_format_has_i && do_xfers;
2069                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2070                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2071         } else if (!am_server) {
2072                 itemizing = stdout_format_has_i;
2073                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2074                 code = itemizing ? FNONE : FINFO;
2075         } else {
2076                 itemizing = 0;
2077                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2078                 code = FINFO;
2079         }
2080         solo_file = local_name;
2081         dir_tweaking = !(list_only || solo_file || dry_run);
2082         need_retouch_dir_times = preserve_times > 1;
2083         lull_mod = allowed_lull * 5;
2084         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2085             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2086
2087         if (verbose > 2)
2088                 rprintf(FINFO, "generator starting pid=%ld\n", (long)getpid());
2089
2090         if (delete_before && !solo_file && cur_flist->used > 0)
2091                 do_delete_pass();
2092         if (delete_during == 2) {
2093                 deldelay_size = BIGPATHBUFLEN * 4;
2094                 deldelay_buf = new_array(char, deldelay_size);
2095                 if (!deldelay_buf)
2096                         out_of_memory("delete-delay");
2097         }
2098         do_progress = 0;
2099
2100         if (append_mode > 0 || whole_file < 0)
2101                 whole_file = 0;
2102         if (verbose >= 2) {
2103                 rprintf(FINFO, "delta-transmission %s\n",
2104                         whole_file
2105                         ? "disabled for local transfer or --whole-file"
2106                         : "enabled");
2107         }
2108
2109         /* Since we often fill up the outgoing socket and then just sit around
2110          * waiting for the other 2 processes to do their thing, we don't want
2111          * to exit on a timeout.  If the data stops flowing, the receiver will
2112          * notice that and let us know via the redo pipe (or its closing). */
2113         ignore_timeout = 1;
2114
2115         dflt_perms = (ACCESSPERMS & ~orig_umask);
2116
2117         do {
2118 #ifdef SUPPORT_HARD_LINKS
2119                 if (preserve_hard_links && inc_recurse) {
2120                         while (!flist_eof && file_total < FILECNT_LOOKAHEAD/2)
2121                                 wait_for_receiver();
2122                 }
2123 #endif
2124
2125                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2126                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2127                         f_name(fp, fbuf);
2128                         ndx = cur_flist->ndx_start - 1;
2129                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2130                         if (delete_during && dry_run < 2 && !list_only) {
2131                                 if (BITS_SETnUNSET(fp->flags, FLAG_CONTENT_DIR, FLAG_MISSING_DIR)) {
2132                                         dev_t dirdev;
2133                                         if (one_file_system) {
2134                                                 uint32 *devp = F_DIR_DEV_P(fp);
2135                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2136                                         } else
2137                                                 dirdev = MAKEDEV(0, 0);
2138                                         delete_in_dir(f_name(fp, fbuf), fp, &dirdev);
2139                                 }
2140                         }
2141                 }
2142                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2143                         struct file_struct *file = cur_flist->sorted[i];
2144
2145                         if (!F_IS_ACTIVE(file))
2146                                 continue;
2147
2148                         if (unsort_ndx)
2149                                 ndx = F_NDX(file);
2150                         else
2151                                 ndx = i + cur_flist->ndx_start;
2152
2153                         if (solo_file)
2154                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2155                         else
2156                                 f_name(file, fbuf);
2157                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2158
2159                         check_for_finished_files(itemizing, code, 0);
2160
2161                         if (allowed_lull && !(i % lull_mod))
2162                                 maybe_send_keepalive();
2163                         else if (!(i & 0xFF))
2164                                 maybe_flush_socket(0);
2165                 }
2166
2167                 if (!inc_recurse) {
2168                         write_ndx(f_out, NDX_DONE);
2169                         break;
2170                 }
2171
2172                 while (1) {
2173                         check_for_finished_files(itemizing, code, 1);
2174                         if (cur_flist->next || flist_eof)
2175                                 break;
2176                         wait_for_receiver();
2177                 }
2178         } while ((cur_flist = cur_flist->next) != NULL);
2179
2180         if (delete_during)
2181                 delete_in_dir(NULL, NULL, &dev_zero);
2182         phase++;
2183         if (verbose > 2)
2184                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2185
2186         while (1) {
2187                 check_for_finished_files(itemizing, code, 1);
2188                 if (msgdone_cnt)
2189                         break;
2190                 wait_for_receiver();
2191         }
2192
2193         phase++;
2194         if (verbose > 2)
2195                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2196
2197         write_ndx(f_out, NDX_DONE);
2198         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2199         if (protocol_version >= 29 && !delay_updates)
2200                 write_ndx(f_out, NDX_DONE);
2201
2202         /* Read MSG_DONE for the redo phase (and any prior messages). */
2203         while (1) {
2204                 check_for_finished_files(itemizing, code, 0);
2205                 if (msgdone_cnt > 1)
2206                         break;
2207                 wait_for_receiver();
2208         }
2209
2210         if (protocol_version >= 29) {
2211                 phase++;
2212                 if (verbose > 2)
2213                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2214                 if (delay_updates)
2215                         write_ndx(f_out, NDX_DONE);
2216                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2217                 while (msgdone_cnt == 2)
2218                         wait_for_receiver();
2219         }
2220
2221         do_progress = save_do_progress;
2222         if (delete_during == 2)
2223                 do_delayed_deletions(fbuf);
2224         if (delete_after && !solo_file && file_total > 0)
2225                 do_delete_pass();
2226
2227         if ((need_retouch_dir_perms || need_retouch_dir_times)
2228          && dir_tweaking && (!inc_recurse || delete_during == 2))
2229                 touch_up_dirs(dir_flist, -1);
2230
2231         if (max_delete >= 0 && deletion_count > max_delete) {
2232                 rprintf(FINFO,
2233                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2234                         deletion_count - max_delete);
2235                 io_error |= IOERR_DEL_LIMIT;
2236         }
2237
2238         if (verbose > 2)
2239                 rprintf(FINFO, "generate_files finished\n");
2240 }