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) 2003-2020 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "inums.h"
  25 #include "ifuncs.h"
  26
  27 extern int dry_run;
  28 extern int do_xfers;
  29 extern int stdout_format_has_i;
  30 extern int logfile_format_has_i;
  31 extern int am_root;
  32 extern int am_server;
  33 extern int am_daemon;
  34 extern int inc_recurse;
  35 extern int relative_paths;
  36 extern int implied_dirs;
  37 extern int keep_dirlinks;
  38 extern int preserve_acls;
  39 extern int preserve_xattrs;
  40 extern int preserve_links;
  41 extern int preserve_devices;
  42 extern int write_devices;
  43 extern int preserve_specials;
  44 extern int preserve_hard_links;
  45 extern int preserve_executability;
  46 extern int preserve_perms;
  47 extern int preserve_times;
  48 extern int delete_mode;
  49 extern int delete_before;
  50 extern int delete_during;
  51 extern int delete_after;
  52 extern int missing_args;
  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 human_readable;
  59 extern int ignore_existing;
  60 extern int ignore_non_existing;
  61 extern int want_xattr_optim;
  62 extern int modify_window;
  63 extern int inplace;
  64 extern int append_mode;
  65 extern int make_backups;
  66 extern int csum_length;
  67 extern int ignore_times;
  68 extern int size_only;
  69 extern OFF_T max_size;
  70 extern OFF_T min_size;
  71 extern int io_error;
  72 extern int flist_eof;
  73 extern int allowed_lull;
  74 extern int sock_f_out;
  75 extern int protocol_version;
  76 extern int file_total;
  77 extern int fuzzy_basis;
  78 extern int always_checksum;
  79 extern int flist_csum_len;
  80 extern char *partial_dir;
  81 extern int alt_dest_type;
  82 extern int whole_file;
  83 extern int list_only;
  84 extern int read_batch;
  85 extern int write_batch;
  86 extern int safe_symlinks;
  87 extern int32 block_size;
  88 extern int unsort_ndx;
  89 extern int max_delete;
  90 extern int force_delete;
  91 extern int one_file_system;
  92 extern int skipped_deletes;
  93 extern dev_t filesystem_dev;
  94 extern mode_t orig_umask;
  95 extern uid_t our_uid;
  96 extern char *tmpdir;
  97 extern char *basis_dir[MAX_BASIS_DIRS+1];
  98 extern struct file_list *cur_flist, *first_flist, *dir_flist;
  99 extern filter_rule_list filter_list, daemon_filter_list;
 100
 101 int maybe_ATTRS_REPORT = 0;
 102 int maybe_ATTRS_ACCURATE_TIME = 0;
 103
 104 static dev_t dev_zero;
 105 static int deldelay_size = 0, deldelay_cnt = 0;
 106 static char *deldelay_buf = NULL;
 107 static int deldelay_fd = -1;
 108 static int loopchk_limit;
 109 static int dir_tweaking;
 110 static int symlink_timeset_failed_flags;
 111 static int need_retouch_dir_times;
 112 static int need_retouch_dir_perms;
 113 static const char *solo_file = NULL;
 114
 115 enum nonregtype {
 116         TYPE_DIR, TYPE_SPECIAL, TYPE_DEVICE, TYPE_SYMLINK
 117 };
 118
 119 /* Forward declarations. */
 120 #ifdef SUPPORT_HARD_LINKS
 121 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
 122                                  enum logcode code, int f_out);
 123 #endif
 124
 125 #define EARLY_DELAY_DONE_MSG() (!delay_updates)
 126 #define EARLY_DELETE_DONE_MSG() (!(delete_during == 2 || delete_after))
 127
 128 static int start_delete_delay_temp(void)
 129 {
 130         char fnametmp[MAXPATHLEN];
 131         int save_dry_run = dry_run;
 132
 133         dry_run = 0;
 134         if (!get_tmpname(fnametmp, "deldelay", False)
 135          || (deldelay_fd = do_mkstemp(fnametmp, 0600)) < 0) {
 136                 rprintf(FINFO, "NOTE: Unable to create delete-delay temp file%s.\n",
 137                         inc_recurse ? "" : " -- switching to --delete-after");
 138                 delete_during = 0;
 139                 delete_after = !inc_recurse;
 140                 dry_run = save_dry_run;
 141                 return 0;
 142         }
 143         unlink(fnametmp);
 144         dry_run = save_dry_run;
 145         return 1;
 146 }
 147
 148 static int flush_delete_delay(void)
 149 {
 150         if (deldelay_fd < 0 && !start_delete_delay_temp())
 151                 return 0;
 152         if (write(deldelay_fd, deldelay_buf, deldelay_cnt) != deldelay_cnt) {
 153                 rsyserr(FERROR, errno, "flush of delete-delay buffer");
 154                 delete_during = 0;
 155                 delete_after = !inc_recurse;
 156                 close(deldelay_fd);
 157                 return 0;
 158         }
 159         deldelay_cnt = 0;
 160         return 1;
 161 }
 162
 163 static int remember_delete(struct file_struct *file, const char *fname, int flags)
 164 {
 165         int len;
 166
 167         if (deldelay_cnt == deldelay_size && !flush_delete_delay())
 168                 return 0;
 169
 170         if (flags & DEL_NO_UID_WRITE)
 171                 deldelay_buf[deldelay_cnt++] = '!';
 172
 173         while (1) {
 174                 len = snprintf(deldelay_buf + deldelay_cnt, deldelay_size - deldelay_cnt,
 175                                "%x %s%c", (int)file->mode, fname, '\0');
 176                 if ((deldelay_cnt += len) <= deldelay_size)
 177                         break;
 178                 deldelay_cnt -= len;
 179                 if (!flush_delete_delay())
 180                         return 0;
 181         }
 182
 183         return 1;
 184 }
 185
 186 static int read_delay_line(char *buf, int *flags_p)
 187 {
 188         static int read_pos = 0;
 189         int j, len, mode;
 190         char *bp, *past_space;
 191
 192         while (1) {
 193                 for (j = read_pos; j < deldelay_cnt && deldelay_buf[j]; j++) {}
 194                 if (j < deldelay_cnt)
 195                         break;
 196                 if (deldelay_fd < 0) {
 197                         if (j > read_pos)
 198                                 goto invalid_data;
 199                         return -1;
 200                 }
 201                 deldelay_cnt -= read_pos;
 202                 if (deldelay_cnt == deldelay_size)
 203                         goto invalid_data;
 204                 if (deldelay_cnt && read_pos) {
 205                         memmove(deldelay_buf, deldelay_buf + read_pos,
 206                                 deldelay_cnt);
 207                 }
 208                 len = read(deldelay_fd, deldelay_buf + deldelay_cnt,
 209                            deldelay_size - deldelay_cnt);
 210                 if (len == 0) {
 211                         if (deldelay_cnt) {
 212                                 rprintf(FERROR, "ERROR: unexpected EOF in delete-delay file.\n");
 213                         }
 214                         return -1;
 215                 }
 216                 if (len < 0) {
 217                         rsyserr(FERROR, errno,
 218                                 "reading delete-delay file");
 219                         return -1;
 220                 }
 221                 deldelay_cnt += len;
 222                 read_pos = 0;
 223         }
 224
 225         bp = deldelay_buf + read_pos;
 226         if (*bp == '!') {
 227                 bp++;
 228                 *flags_p = DEL_NO_UID_WRITE;
 229         } else
 230                 *flags_p = 0;
 231
 232         if (sscanf(bp, "%x ", &mode) != 1) {
 233           invalid_data:
 234                 rprintf(FERROR, "ERROR: invalid data in delete-delay file.\n");
 235                 return -1;
 236         }
 237         past_space = strchr(bp, ' ') + 1;
 238         len = j - read_pos - (past_space - bp) + 1; /* count the '\0' */
 239         read_pos = j + 1;
 240
 241         if (len > MAXPATHLEN) {
 242                 rprintf(FERROR, "ERROR: filename too long in delete-delay file.\n");
 243                 return -1;
 244         }
 245
 246         /* The caller needs the name in a MAXPATHLEN buffer, so we copy it
 247          * instead of returning a pointer to our buffer. */
 248         memcpy(buf, past_space, len);
 249
 250         return mode;
 251 }
 252
 253 static void do_delayed_deletions(char *delbuf)
 254 {
 255         int mode, flags;
 256
 257         if (deldelay_fd >= 0) {
 258                 if (deldelay_cnt && !flush_delete_delay())
 259                         return;
 260                 lseek(deldelay_fd, 0, 0);
 261         }
 262         while ((mode = read_delay_line(delbuf, &flags)) >= 0)
 263                 delete_item(delbuf, mode, flags | DEL_RECURSE);
 264         if (deldelay_fd >= 0)
 265                 close(deldelay_fd);
 266 }
 267
 268 /* This function is used to implement per-directory deletion, and is used by
 269  * all the --delete-WHEN options.  Note that the fbuf pointer must point to a
 270  * MAXPATHLEN buffer with the name of the directory in it (the functions we
 271  * call will append names onto the end, but the old dir value will be restored
 272  * on exit). */
 273 static void delete_in_dir(char *fbuf, struct file_struct *file, dev_t *fs_dev)
 274 {
 275         static int already_warned = 0;
 276         static struct hashtable *dev_tbl;
 277         struct file_list *dirlist;
 278         char delbuf[MAXPATHLEN];
 279         int dlen, i;
 280
 281         if (!fbuf) {
 282                 change_local_filter_dir(NULL, 0, 0);
 283                 return;
 284         }
 285
 286         if (DEBUG_GTE(DEL, 2))
 287                 rprintf(FINFO, "delete_in_dir(%s)\n", fbuf);
 288
 289         if (allowed_lull)
 290                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
 291
 292         if (io_error & IOERR_GENERAL && !ignore_errors) {
 293                 if (already_warned)
 294                         return;
 295                 rprintf(FINFO,
 296                         "IO error encountered -- skipping file deletion\n");
 297                 already_warned = 1;
 298                 return;
 299         }
 300
 301         dlen = strlen(fbuf);
 302         change_local_filter_dir(fbuf, dlen, F_DEPTH(file));
 303
 304         if (one_file_system) {
 305                 if (!dev_tbl)
 306                         dev_tbl = hashtable_create(16, HT_KEY64);
 307                 if (file->flags & FLAG_TOP_DIR) {
 308                         hashtable_find(dev_tbl, *fs_dev+1, "");
 309                         filesystem_dev = *fs_dev;
 310                 } else if (filesystem_dev != *fs_dev) {
 311                         if (!hashtable_find(dev_tbl, *fs_dev+1, NULL))
 312                                 return;
 313                         filesystem_dev = *fs_dev; /* it's a prior top-dir dev */
 314                 }
 315         }
 316
 317         dirlist = get_dirlist(fbuf, dlen, 0);
 318
 319         /* If an item in dirlist is not found in flist, delete it
 320          * from the filesystem. */
 321         for (i = dirlist->used; i--; ) {
 322                 struct file_struct *fp = dirlist->files[i];
 323                 if (!F_IS_ACTIVE(fp))
 324                         continue;
 325                 if (fp->flags & FLAG_MOUNT_DIR && S_ISDIR(fp->mode)) {
 326                         if (INFO_GTE(MOUNT, 1))
 327                                 rprintf(FINFO, "cannot delete mount point: %s\n",
 328                                         f_name(fp, NULL));
 329                         continue;
 330                 }
 331                 /* Here we want to match regardless of file type.  Replacement
 332                  * of a file with one of another type is handled separately by
 333                  * a delete_item call with a DEL_MAKE_ROOM flag. */
 334                 if (flist_find_ignore_dirness(cur_flist, fp) < 0) {
 335                         int flags = DEL_RECURSE;
 336                         if (!(fp->mode & S_IWUSR) && !am_root && fp->flags & FLAG_OWNED_BY_US)
 337                                 flags |= DEL_NO_UID_WRITE;
 338                         f_name(fp, delbuf);
 339                         if (delete_during == 2) {
 340                                 if (!remember_delete(fp, delbuf, flags))
 341                                         break;
 342                         } else
 343                                 delete_item(delbuf, fp->mode, flags);
 344                 }
 345         }
 346
 347         flist_free(dirlist);
 348 }
 349
 350 /* This deletes any files on the receiving side that are not present on the
 351  * sending side.  This is used by --delete-before and --delete-after. */
 352 static void do_delete_pass(void)
 353 {
 354         char fbuf[MAXPATHLEN];
 355         STRUCT_STAT st;
 356         int j;
 357
 358         /* dry_run is incremented when the destination doesn't exist yet. */
 359         if (dry_run > 1 || list_only)
 360                 return;
 361
 362         for (j = 0; j < cur_flist->used; j++) {
 363                 struct file_struct *file = cur_flist->sorted[j];
 364
 365                 if (!F_IS_ACTIVE(file))
 366                         continue;
 367
 368                 f_name(file, fbuf);
 369
 370                 if (!(file->flags & FLAG_CONTENT_DIR)) {
 371                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(file));
 372                         continue;
 373                 }
 374
 375                 if (DEBUG_GTE(DEL, 1) && file->flags & FLAG_TOP_DIR)
 376                         rprintf(FINFO, "deleting in %s\n", fbuf);
 377
 378                 if (link_stat(fbuf, &st, keep_dirlinks) < 0
 379                  || !S_ISDIR(st.st_mode))
 380                         continue;
 381
 382                 delete_in_dir(fbuf, file, &st.st_dev);
 383         }
 384         delete_in_dir(NULL, NULL, &dev_zero);
 385
 386         if (INFO_GTE(FLIST, 2) && !am_server)
 387                 rprintf(FINFO, "                    \r");
 388 }
 389
 390 static inline int mtime_differs(STRUCT_STAT *stp, struct file_struct *file)
 391 {
 392 #ifdef ST_MTIME_NSEC
 393         return !same_time(stp->st_mtime, stp->ST_MTIME_NSEC, file->modtime, F_MOD_NSEC_or_0(file));
 394 #else
 395         return !same_time(stp->st_mtime, 0, file->modtime, 0);
 396 #endif
 397 }
 398
 399 static inline int any_time_differs(stat_x *sxp, struct file_struct *file, UNUSED(const char *fname))
 400 {
 401         int differs = mtime_differs(&sxp->st, file);
 402 #ifdef SUPPORT_CRTIMES
 403         if (!differs && crtimes_ndx) {
 404                 if (sxp->crtime == 0)
 405                         sxp->crtime = get_create_time(fname);
 406                 differs = !same_time(sxp->crtime, 0, F_CRTIME(file), 0);
 407         }
 408 #endif
 409         return differs;
 410 }
 411
 412 static inline int perms_differ(struct file_struct *file, stat_x *sxp)
 413 {
 414         if (preserve_perms)
 415                 return !BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS);
 416
 417         if (preserve_executability)
 418                 return (sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0);
 419
 420         return 0;
 421 }
 422
 423 static inline int ownership_differs(struct file_struct *file, stat_x *sxp)
 424 {
 425         if (am_root && uid_ndx && sxp->st.st_uid != (uid_t)F_OWNER(file))
 426                 return 1;
 427
 428         if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 429                 return 1;
 430
 431         return 0;
 432 }
 433
 434 #ifdef SUPPORT_ACLS
 435 static inline int acls_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 436 {
 437         if (preserve_acls) {
 438                 if (!ACL_READY(*sxp))
 439                         get_acl(fname, sxp);
 440                 if (set_acl(NULL, file, sxp, file->mode))
 441                         return 1;
 442         }
 443
 444         return 0;
 445 }
 446 #endif
 447
 448 #ifdef SUPPORT_XATTRS
 449 static inline int xattrs_differ(const char *fname, struct file_struct *file, stat_x *sxp)
 450 {
 451         if (preserve_xattrs) {
 452                 if (!XATTR_READY(*sxp))
 453                         get_xattr(fname, sxp);
 454                 if (xattr_diff(file, sxp, 0))
 455                         return 1;
 456         }
 457
 458         return 0;
 459 }
 460 #endif
 461
 462 int unchanged_attrs(const char *fname, struct file_struct *file, stat_x *sxp)
 463 {
 464         if (S_ISLNK(file->mode)) {
 465 #ifdef CAN_SET_SYMLINK_TIMES
 466                 if (preserve_times & PRESERVE_LINK_TIMES && any_time_differs(sxp, file, fname))
 467                         return 0;
 468 #endif
 469 #ifdef CAN_CHMOD_SYMLINK
 470                 if (perms_differ(file, sxp))
 471                         return 0;
 472 #endif
 473 #ifdef CAN_CHOWN_SYMLINK
 474                 if (ownership_differs(file, sxp))
 475                         return 0;
 476 #endif
 477 #if defined SUPPORT_ACLS && 0 /* no current symlink-ACL support */
 478                 if (acls_differ(fname, file, sxp))
 479                         return 0;
 480 #endif
 481 #if defined SUPPORT_XATTRS && !defined NO_SYMLINK_XATTRS
 482                 if (xattrs_differ(fname, file, sxp))
 483                         return 0;
 484 #endif
 485         } else {
 486                 if (preserve_times && any_time_differs(sxp, file, fname))
 487                         return 0;
 488                 if (perms_differ(file, sxp))
 489                         return 0;
 490                 if (ownership_differs(file, sxp))
 491                         return 0;
 492 #ifdef SUPPORT_ACLS
 493                 if (acls_differ(fname, file, sxp))
 494                         return 0;
 495 #endif
 496 #ifdef SUPPORT_XATTRS
 497                 if (xattrs_differ(fname, file, sxp))
 498                         return 0;
 499 #endif
 500         }
 501
 502         return 1;
 503 }
 504
 505 void itemize(const char *fnamecmp, struct file_struct *file, int ndx, int statret,
 506              stat_x *sxp, int32 iflags, uchar fnamecmp_type,
 507              const char *xname)
 508 {
 509         if (statret >= 0) { /* A from-dest-dir statret can == 1! */
 510                 int keep_time = !preserve_times ? 0
 511                     : S_ISDIR(file->mode) ? preserve_times & PRESERVE_DIR_TIMES
 512                     : S_ISLNK(file->mode) ? preserve_times & PRESERVE_LINK_TIMES
 513                     : 1;
 514
 515                 if (S_ISREG(file->mode) && F_LENGTH(file) != sxp->st.st_size)
 516                         iflags |= ITEM_REPORT_SIZE;
 517                 if (file->flags & FLAG_TIME_FAILED) { /* symlinks only */
 518                         if (iflags & ITEM_LOCAL_CHANGE)
 519                                 iflags |= symlink_timeset_failed_flags;
 520                 } else if (keep_time
 521                  ? mtime_differs(&sxp->st, file)
 522                  : iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE) && !(iflags & ITEM_MATCHED)
 523                   && (!(iflags & ITEM_XNAME_FOLLOWS) || *xname))
 524                         iflags |= ITEM_REPORT_TIME;
 525                 if (atimes_ndx && !S_ISDIR(file->mode) && !S_ISLNK(file->mode)
 526                  && !same_time(F_ATIME(file), 0, sxp->st.st_atime, 0))
 527                         iflags |= ITEM_REPORT_ATIME;
 528 #ifdef SUPPORT_CRTIMES
 529                 if (crtimes_ndx) {
 530                         if (sxp->crtime == 0)
 531                                 sxp->crtime = get_create_time(fnamecmp);
 532                         if (!same_time(sxp->crtime, 0, F_CRTIME(file), 0))
 533                                 iflags |= ITEM_REPORT_CRTIME;
 534                 }
 535 #endif
 536 #if !defined HAVE_LCHMOD && !defined HAVE_SETATTRLIST
 537                 if (S_ISLNK(file->mode)) {
 538                         ;
 539                 } else
 540 #endif
 541                 if (preserve_perms) {
 542                         if (!BITS_EQUAL(sxp->st.st_mode, file->mode, CHMOD_BITS))
 543                                 iflags |= ITEM_REPORT_PERMS;
 544                 } else if (preserve_executability
 545                  && ((sxp->st.st_mode & 0111 ? 1 : 0) ^ (file->mode & 0111 ? 1 : 0)))
 546                         iflags |= ITEM_REPORT_PERMS;
 547                 if (uid_ndx && am_root && (uid_t)F_OWNER(file) != sxp->st.st_uid)
 548                         iflags |= ITEM_REPORT_OWNER;
 549                 if (gid_ndx && !(file->flags & FLAG_SKIP_GROUP) && sxp->st.st_gid != (gid_t)F_GROUP(file))
 550                         iflags |= ITEM_REPORT_GROUP;
 551 #ifdef SUPPORT_ACLS
 552                 if (preserve_acls && !S_ISLNK(file->mode)) {
 553                         if (!ACL_READY(*sxp))
 554                                 get_acl(fnamecmp, sxp);
 555                         if (set_acl(NULL, file, sxp, file->mode))
 556                                 iflags |= ITEM_REPORT_ACL;
 557                 }
 558 #endif
 559 #ifdef SUPPORT_XATTRS
 560                 if (preserve_xattrs) {
 561                         if (!XATTR_READY(*sxp))
 562                                 get_xattr(fnamecmp, sxp);
 563                         if (xattr_diff(file, sxp, 1))
 564                                 iflags |= ITEM_REPORT_XATTR;
 565                 }
 566 #endif
 567         } else {
 568 #ifdef SUPPORT_XATTRS
 569                 if (preserve_xattrs && xattr_diff(file, NULL, 1))
 570                         iflags |= ITEM_REPORT_XATTR;
 571 #endif
 572                 iflags |= ITEM_IS_NEW;
 573         }
 574
 575         iflags &= 0xffff;
 576         if ((iflags & (SIGNIFICANT_ITEM_FLAGS|ITEM_REPORT_XATTR) || INFO_GTE(NAME, 2)
 577           || stdout_format_has_i > 1 || (xname && *xname)) && !read_batch) {
 578                 if (protocol_version >= 29) {
 579                         if (ndx >= 0)
 580                                 write_ndx(sock_f_out, ndx);
 581                         write_shortint(sock_f_out, iflags);
 582                         if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
 583                                 write_byte(sock_f_out, fnamecmp_type);
 584                         if (iflags & ITEM_XNAME_FOLLOWS)
 585                                 write_vstring(sock_f_out, xname, strlen(xname));
 586 #ifdef SUPPORT_XATTRS
 587                         if (preserve_xattrs && do_xfers
 588                          && iflags & (ITEM_REPORT_XATTR|ITEM_TRANSFER)) {
 589                                 int fd = iflags & ITEM_REPORT_XATTR
 590                                       && !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE))
 591                                        ? sock_f_out : -1;
 592                                 send_xattr_request(NULL, file, fd);
 593                         }
 594 #endif
 595                 } else if (ndx >= 0) {
 596                         enum logcode code = logfile_format_has_i ? FINFO : FCLIENT;
 597                         log_item(code, file, iflags, xname);
 598                 }
 599         }
 600 }
 601
 602
 603 /* Perform our quick-check heuristic for determining if a file is unchanged. */
 604 int unchanged_file(char *fn, struct file_struct *file, STRUCT_STAT *st)
 605 {
 606         if (st->st_size != F_LENGTH(file))
 607                 return 0;
 608
 609         /* if always checksum is set then we use the checksum instead
 610            of the file time to determine whether to sync */
 611         if (always_checksum > 0 && S_ISREG(st->st_mode)) {
 612                 char sum[MAX_DIGEST_LEN];
 613                 file_checksum(fn, st, sum);
 614                 return memcmp(sum, F_SUM(file), flist_csum_len) == 0;
 615         }
 616
 617         if (size_only > 0)
 618                 return 1;
 619
 620         if (ignore_times)
 621                 return 0;
 622
 623         return !mtime_differs(st, file);
 624 }
 625
 626
 627 /*
 628  * set (initialize) the size entries in the per-file sum_struct
 629  * calculating dynamic block and checksum sizes.
 630  *
 631  * This is only called from generate_and_send_sums() but is a separate
 632  * function to encapsulate the logic.
 633  *
 634  * The block size is a rounded square root of file length.
 635  *
 636  * The checksum size is determined according to:
 637  *     blocksum_bits = BLOCKSUM_BIAS + 2*log2(file_len) - log2(block_len)
 638  * provided by Donovan Baarda which gives a probability of rsync
 639  * algorithm corrupting data and falling back using the whole md4
 640  * checksums.
 641  *
 642  * This might be made one of several selectable heuristics.
 643  */
 644 static void sum_sizes_sqroot(struct sum_struct *sum, int64 len)
 645 {
 646         int32 blength;
 647         int s2length;
 648         int64 l;
 649
 650         if (len < 0) {
 651                 /* The file length overflowed our int64 var, so we can't process this file. */
 652                 sum->count = -1; /* indicate overflow error */
 653                 return;
 654         }
 655
 656         if (block_size)
 657                 blength = block_size;
 658         else if (len <= BLOCK_SIZE * BLOCK_SIZE)
 659                 blength = BLOCK_SIZE;
 660         else {
 661                 int32 max_blength = protocol_version < 30 ? OLD_MAX_BLOCK_SIZE : MAX_BLOCK_SIZE;
 662                 int32 c;
 663                 int cnt;
 664                 for (c = 1, l = len, cnt = 0; l >>= 2; c <<= 1, cnt++) {}
 665                 if (c < 0 || c >= max_blength)
 666                         blength = max_blength;
 667                 else {
 668                         blength = 0;
 669                         do {
 670                                 blength |= c;
 671                                 if (len < (int64)blength * blength)
 672                                         blength &= ~c;
 673                                 c >>= 1;
 674                         } while (c >= 8);       /* round to multiple of 8 */
 675                         blength = MAX(blength, BLOCK_SIZE);
 676                 }
 677         }
 678
 679         if (protocol_version < 27) {
 680                 s2length = csum_length;
 681         } else if (csum_length == SUM_LENGTH) {
 682                 s2length = SUM_LENGTH;
 683         } else {
 684                 int32 c;
 685                 int b = BLOCKSUM_BIAS;
 686                 for (l = len; l >>= 1; b += 2) {}
 687                 for (c = blength; (c >>= 1) && b; b--) {}
 688                 /* add a bit, subtract rollsum, round up. */
 689                 s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
 690                 s2length = MAX(s2length, csum_length);
 691                 s2length = MIN(s2length, SUM_LENGTH);
 692         }
 693
 694         sum->flength    = len;
 695         sum->blength    = blength;
 696         sum->s2length   = s2length;
 697         sum->remainder  = (int32)(len % blength);
 698         sum->count      = (int32)(l = (len / blength) + (sum->remainder != 0));
 699
 700         if ((int64)sum->count != l)
 701                 sum->count = -1;
 702
 703         if (sum->count && DEBUG_GTE(DELTASUM, 2)) {
 704                 rprintf(FINFO,
 705                         "count=%s rem=%ld blength=%ld s2length=%d flength=%s\n",
 706                         big_num(sum->count), (long)sum->remainder, (long)sum->blength,
 707                         sum->s2length, big_num(sum->flength));
 708         }
 709 }
 710
 711
 712 /*
 713  * Generate and send a stream of signatures/checksums that describe a buffer
 714  *
 715  * Generate approximately one checksum every block_len bytes.
 716  */
 717 static int generate_and_send_sums(int fd, OFF_T len, int f_out, int f_copy)
 718 {
 719         int32 i;
 720         struct map_struct *mapbuf;
 721         struct sum_struct sum;
 722         OFF_T offset = 0;
 723
 724         sum_sizes_sqroot(&sum, len);
 725         if (sum.count < 0)
 726                 return -1;
 727         write_sum_head(f_out, &sum);
 728
 729         if (append_mode > 0 && f_copy < 0)
 730                 return 0;
 731
 732         if (len > 0)
 733                 mapbuf = map_file(fd, len, MAX_MAP_SIZE, sum.blength);
 734         else
 735                 mapbuf = NULL;
 736
 737         for (i = 0; i < sum.count; i++) {
 738                 int32 n1 = (int32)MIN(len, (OFF_T)sum.blength);
 739                 char *map = map_ptr(mapbuf, offset, n1);
 740                 char sum2[SUM_LENGTH];
 741                 uint32 sum1;
 742
 743                 len -= n1;
 744                 offset += n1;
 745
 746                 if (f_copy >= 0) {
 747                         full_write(f_copy, map, n1);
 748                         if (append_mode > 0)
 749                                 continue;
 750                 }
 751
 752                 sum1 = get_checksum1(map, n1);
 753                 get_checksum2(map, n1, sum2);
 754
 755                 if (DEBUG_GTE(DELTASUM, 3)) {
 756                         rprintf(FINFO,
 757                                 "chunk[%s] offset=%s len=%ld sum1=%08lx\n",
 758                                 big_num(i), big_num(offset - n1), (long)n1,
 759                                 (unsigned long)sum1);
 760                 }
 761                 write_int(f_out, sum1);
 762                 write_buf(f_out, sum2, sum.s2length);
 763         }
 764
 765         if (mapbuf)
 766                 unmap_file(mapbuf);
 767
 768         return 0;
 769 }
 770
 771
 772 /* Try to find a filename in the same dir as "fname" with a similar name. */
 773 static struct file_struct *find_fuzzy(struct file_struct *file, struct file_list *dirlist_array[], uchar *fnamecmp_type_ptr)
 774 {
 775         int fname_len, fname_suf_len;
 776         const char *fname_suf, *fname = file->basename;
 777         uint32 lowest_dist = 25 << 16; /* ignore a distance greater than 25 */
 778         int i, j;
 779         struct file_struct *lowest_fp = NULL;
 780
 781         fname_len = strlen(fname);
 782         fname_suf = find_filename_suffix(fname, fname_len, &fname_suf_len);
 783
 784         /* Try to find an exact size+mtime match first. */
 785         for (i = 0; i < fuzzy_basis; i++) {
 786                 struct file_list *dirlist = dirlist_array[i];
 787
 788                 if (!dirlist)
 789                         continue;
 790
 791                 for (j = 0; j < dirlist->used; j++) {
 792                         struct file_struct *fp = dirlist->files[j];
 793
 794                         if (!F_IS_ACTIVE(fp))
 795                                 continue;
 796
 797                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 798                                 continue;
 799
 800                         if (F_LENGTH(fp) == F_LENGTH(file) && same_time(fp->modtime, 0, file->modtime, 0)) {
 801                                 if (DEBUG_GTE(FUZZY, 2))
 802                                         rprintf(FINFO, "fuzzy size/modtime match for %s\n", f_name(fp, NULL));
 803                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 804                                 return fp;
 805                         }
 806
 807                 }
 808         }
 809
 810         for (i = 0; i < fuzzy_basis; i++) {
 811                 struct file_list *dirlist = dirlist_array[i];
 812
 813                 if (!dirlist)
 814                         continue;
 815
 816                 for (j = 0; j < dirlist->used; j++) {
 817                         struct file_struct *fp = dirlist->files[j];
 818                         const char *suf, *name;
 819                         int len, suf_len;
 820                         uint32 dist;
 821
 822                         if (!F_IS_ACTIVE(fp))
 823                                 continue;
 824
 825                         if (!S_ISREG(fp->mode) || !F_LENGTH(fp) || fp->flags & FLAG_FILE_SENT)
 826                                 continue;
 827
 828                         name = fp->basename;
 829                         len = strlen(name);
 830                         suf = find_filename_suffix(name, len, &suf_len);
 831
 832                         dist = fuzzy_distance(name, len, fname, fname_len);
 833                         /* Add some extra weight to how well the suffixes match. */
 834                         dist += fuzzy_distance(suf, suf_len, fname_suf, fname_suf_len) * 10;
 835                         if (DEBUG_GTE(FUZZY, 2)) {
 836                                 rprintf(FINFO, "fuzzy distance for %s = %d.%05d\n",
 837                                         f_name(fp, NULL), (int)(dist>>16), (int)(dist&0xFFFF));
 838                         }
 839                         if (dist <= lowest_dist) {
 840                                 lowest_dist = dist;
 841                                 lowest_fp = fp;
 842                                 *fnamecmp_type_ptr = FNAMECMP_FUZZY + i;
 843                         }
 844                 }
 845         }
 846
 847         return lowest_fp;
 848 }
 849
 850 /* Copy a file found in our --copy-dest handling. */
 851 static int copy_altdest_file(const char *src, const char *dest, struct file_struct *file)
 852 {
 853         char buf[MAXPATHLEN];
 854         const char *copy_to, *partialptr;
 855         int save_preserve_xattrs = preserve_xattrs;
 856         int ok, fd_w;
 857
 858         if (inplace) {
 859                 /* Let copy_file open the destination in place. */
 860                 fd_w = -1;
 861                 copy_to = dest;
 862         } else {
 863                 fd_w = open_tmpfile(buf, dest, file);
 864                 if (fd_w < 0)
 865                         return -1;
 866                 copy_to = buf;
 867         }
 868         cleanup_set(copy_to, NULL, NULL, -1, -1);
 869         if (copy_file(src, copy_to, fd_w, file->mode) < 0) {
 870                 if (INFO_GTE(COPY, 1)) {
 871                         rsyserr(FINFO, errno, "copy_file %s => %s",
 872                                 full_fname(src), copy_to);
 873                 }
 874                 /* Try to clean up. */
 875                 unlink(copy_to);
 876                 cleanup_disable();
 877                 return -1;
 878         }
 879         partialptr = partial_dir ? partial_dir_fname(dest) : NULL;
 880         preserve_xattrs = 0; /* xattrs were copied with file */
 881         ok = finish_transfer(dest, copy_to, src, partialptr, file, 1, 0);
 882         preserve_xattrs = save_preserve_xattrs;
 883         cleanup_disable();
 884         return ok ? 0 : -1;
 885 }
 886
 887 /* This is only called for regular files.  We return -2 if we've finished
 888  * handling the file, -1 if no dest-linking occurred, or a non-negative
 889  * value if we found an alternate basis file.  If we're called with the
 890  * find_exact_for_existing flag, the destination file already exists, so
 891  * we only try to find an exact alt-dest match.  In this case, the returns
 892  * are only -2 & -1 (both as above). */
 893 static int try_dests_reg(struct file_struct *file, char *fname, int ndx,
 894                          char *cmpbuf, stat_x *sxp, int find_exact_for_existing,
 895                          int itemizing, enum logcode code)
 896 {
 897         STRUCT_STAT real_st = sxp->st;
 898         int best_match = -1;
 899         int match_level = 0;
 900         int j = 0;
 901
 902         do {
 903                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 904                 if (link_stat(cmpbuf, &sxp->st, 0) < 0 || !S_ISREG(sxp->st.st_mode))
 905                         continue;
 906                 if (match_level == 0) {
 907                         best_match = j;
 908                         match_level = 1;
 909                 }
 910                 if (!unchanged_file(cmpbuf, file, &sxp->st))
 911                         continue;
 912                 if (match_level == 1) {
 913                         best_match = j;
 914                         match_level = 2;
 915                 }
 916                 if (unchanged_attrs(cmpbuf, file, sxp)) {
 917                         best_match = j;
 918                         match_level = 3;
 919                         break;
 920                 }
 921                 free_stat_x(sxp);
 922         } while (basis_dir[++j] != NULL);
 923
 924         if (!match_level)
 925                 goto got_nothing_for_ya;
 926
 927         if (j != best_match) {
 928                 j = best_match;
 929                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
 930                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
 931                         goto got_nothing_for_ya;
 932         }
 933
 934         if (match_level == 3 && alt_dest_type != COPY_DEST) {
 935                 if (find_exact_for_existing) {
 936                         if (alt_dest_type == LINK_DEST && real_st.st_dev == sxp->st.st_dev && real_st.st_ino == sxp->st.st_ino)
 937                                 return -1;
 938                         if (do_unlink(fname) < 0 && errno != ENOENT)
 939                                 goto got_nothing_for_ya;
 940                 }
 941 #ifdef SUPPORT_HARD_LINKS
 942                 if (alt_dest_type == LINK_DEST) {
 943                         if (!hard_link_one(file, fname, cmpbuf, 1))
 944                                 goto try_a_copy;
 945                         if (atimes_ndx)
 946                                 set_file_attrs(fname, file, sxp, NULL, 0);
 947                         if (preserve_hard_links && F_IS_HLINKED(file))
 948                                 finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, j);
 949                         if (!maybe_ATTRS_REPORT && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
 950                                 itemize(cmpbuf, file, ndx, 1, sxp,
 951                                         ITEM_LOCAL_CHANGE | ITEM_XNAME_FOLLOWS,
 952                                         0, "");
 953                         }
 954                 } else
 955 #endif
 956                 {
 957                         if (itemizing)
 958                                 itemize(cmpbuf, file, ndx, 0, sxp, 0, 0, NULL);
 959                 }
 960                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT)
 961                         rprintf(FCLIENT, "%s is uptodate\n", fname);
 962                 return -2;
 963         }
 964
 965         if (find_exact_for_existing)
 966                 goto got_nothing_for_ya;
 967
 968         if (match_level >= 2) {
 969 #ifdef SUPPORT_HARD_LINKS
 970           try_a_copy: /* Copy the file locally. */
 971 #endif
 972                 if (!dry_run && copy_altdest_file(cmpbuf, fname, file) < 0) {
 973                         if (find_exact_for_existing) /* Can get here via hard-link failure */
 974                                 goto got_nothing_for_ya;
 975                         return -1;
 976                 }
 977                 if (itemizing)
 978                         itemize(cmpbuf, file, ndx, 0, sxp, ITEM_LOCAL_CHANGE, 0, NULL);
 979                 if (maybe_ATTRS_REPORT
 980                  && ((!itemizing && INFO_GTE(NAME, 1) && match_level == 2)
 981                   || (INFO_GTE(NAME, 2) && match_level == 3))) {
 982                         code = match_level == 3 ? FCLIENT : FINFO;
 983                         rprintf(code, "%s%s\n", fname,
 984                                 match_level == 3 ? " is uptodate" : "");
 985                 }
 986 #ifdef SUPPORT_HARD_LINKS
 987                 if (preserve_hard_links && F_IS_HLINKED(file))
 988                         finish_hard_link(file, fname, ndx, &sxp->st, itemizing, code, -1);
 989 #endif
 990                 return -2;
 991         }
 992
 993         return FNAMECMP_BASIS_DIR_LOW + j;
 994
 995 got_nothing_for_ya:
 996         sxp->st = real_st;
 997         return -1;
 998 }
 999
1000 /* This is only called for non-regular files.  We return -2 if we've finished
1001  * handling the file, or -1 if no dest-linking occurred, or a non-negative
1002  * value if we found an alternate basis file. */
1003 static int try_dests_non(struct file_struct *file, char *fname, int ndx,
1004                          char *cmpbuf, stat_x *sxp, int itemizing,
1005                          enum logcode code)
1006 {
1007         int best_match = -1;
1008         int match_level = 0;
1009         enum nonregtype type;
1010         uint32 *devp;
1011 #ifdef SUPPORT_LINKS
1012         char lnk[MAXPATHLEN];
1013         int len;
1014 #endif
1015         int j = 0;
1016
1017 #ifndef SUPPORT_LINKS
1018         if (S_ISLNK(file->mode))
1019                 return -1;
1020 #endif
1021         if (S_ISDIR(file->mode)) {
1022                 type = TYPE_DIR;
1023         } else if (IS_SPECIAL(file->mode))
1024                 type = TYPE_SPECIAL;
1025         else if (IS_DEVICE(file->mode))
1026                 type = TYPE_DEVICE;
1027 #ifdef SUPPORT_LINKS
1028         else if (S_ISLNK(file->mode))
1029                 type = TYPE_SYMLINK;
1030 #endif
1031         else {
1032                 rprintf(FERROR,
1033                         "internal: try_dests_non() called with invalid mode (%o)\n",
1034                         (int)file->mode);
1035                 exit_cleanup(RERR_UNSUPPORTED);
1036         }
1037
1038         do {
1039                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1040                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1041                         continue;
1042                 switch (type) {
1043                 case TYPE_DIR:
1044                         if (!S_ISDIR(sxp->st.st_mode))
1045                                 continue;
1046                         break;
1047                 case TYPE_SPECIAL:
1048                         if (!IS_SPECIAL(sxp->st.st_mode))
1049                                 continue;
1050                         break;
1051                 case TYPE_DEVICE:
1052                         if (!IS_DEVICE(sxp->st.st_mode))
1053                                 continue;
1054                         break;
1055                 case TYPE_SYMLINK:
1056 #ifdef SUPPORT_LINKS
1057                         if (!S_ISLNK(sxp->st.st_mode))
1058                                 continue;
1059                         break;
1060 #else
1061                         return -1;
1062 #endif
1063                 }
1064                 if (match_level < 1) {
1065                         match_level = 1;
1066                         best_match = j;
1067                 }
1068                 switch (type) {
1069                 case TYPE_DIR:
1070                 case TYPE_SPECIAL:
1071                         break;
1072                 case TYPE_DEVICE:
1073                         devp = F_RDEV_P(file);
1074                         if (sxp->st.st_rdev != MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp)))
1075                                 continue;
1076                         break;
1077                 case TYPE_SYMLINK:
1078 #ifdef SUPPORT_LINKS
1079                         if ((len = do_readlink(cmpbuf, lnk, MAXPATHLEN-1)) <= 0)
1080                                 continue;
1081                         lnk[len] = '\0';
1082                         if (strcmp(lnk, F_SYMLINK(file)) != 0)
1083                                 continue;
1084                         break;
1085 #else
1086                         return -1;
1087 #endif
1088                 }
1089                 if (match_level < 2) {
1090                         match_level = 2;
1091                         best_match = j;
1092                 }
1093                 if (unchanged_attrs(cmpbuf, file, sxp)) {
1094                         match_level = 3;
1095                         best_match = j;
1096                         break;
1097                 }
1098         } while (basis_dir[++j] != NULL);
1099
1100         if (!match_level)
1101                 return -1;
1102
1103         if (j != best_match) {
1104                 j = best_match;
1105                 pathjoin(cmpbuf, MAXPATHLEN, basis_dir[j], fname);
1106                 if (link_stat(cmpbuf, &sxp->st, 0) < 0)
1107                         return -1;
1108         }
1109
1110         if (match_level == 3) {
1111 #ifdef SUPPORT_HARD_LINKS
1112                 if (alt_dest_type == LINK_DEST
1113 #ifndef CAN_HARDLINK_SYMLINK
1114                  && !S_ISLNK(file->mode)
1115 #endif
1116 #ifndef CAN_HARDLINK_SPECIAL
1117                  && !IS_SPECIAL(file->mode) && !IS_DEVICE(file->mode)
1118 #endif
1119                  && !S_ISDIR(file->mode)) {
1120                         if (do_link(cmpbuf, fname) < 0) {
1121                                 rsyserr(FERROR_XFER, errno,
1122                                         "failed to hard-link %s with %s",
1123                                         cmpbuf, fname);
1124                                 return j;
1125                         }
1126                         if (preserve_hard_links && F_IS_HLINKED(file))
1127                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1128                 } else
1129 #endif
1130                         match_level = 2;
1131                 if (itemizing && stdout_format_has_i
1132                  && (INFO_GTE(NAME, 2) || stdout_format_has_i > 1)) {
1133                         int chg = alt_dest_type == COMPARE_DEST && type != TYPE_DIR ? 0
1134                             : ITEM_LOCAL_CHANGE + (match_level == 3 ? ITEM_XNAME_FOLLOWS : 0);
1135                         char *lp = match_level == 3 ? "" : NULL;
1136                         itemize(cmpbuf, file, ndx, 0, sxp, chg + ITEM_MATCHED, 0, lp);
1137                 }
1138                 if (INFO_GTE(NAME, 2) && maybe_ATTRS_REPORT) {
1139                         rprintf(FCLIENT, "%s%s is uptodate\n",
1140                                 fname, type == TYPE_DIR ? "/" : "");
1141                 }
1142                 return -2;
1143         }
1144
1145         return j;
1146 }
1147
1148 static void list_file_entry(struct file_struct *f)
1149 {
1150         char permbuf[PERMSTRING_SIZE];
1151         const char *mtime_str = timestring(f->modtime);
1152         int size_width = human_readable ? 14 : 11;
1153         int mtime_width = 1 + strlen(mtime_str);
1154         int atime_width = atimes_ndx ? mtime_width : 0;
1155         int crtime_width = crtimes_ndx ? mtime_width : 0;
1156
1157         if (!F_IS_ACTIVE(f)) {
1158                 /* this can happen if duplicate names were removed */
1159                 return;
1160         }
1161
1162         /* TODO: indicate '+' if the entry has an ACL. */
1163
1164         if (missing_args == 2 && f->mode == 0) {
1165                 rprintf(FINFO, "%-*s %s\n",
1166                         10 + 1 + size_width + mtime_width + atime_width + crtime_width, "*missing",
1167                         f_name(f, NULL));
1168         } else {
1169                 const char *atime_str = atimes_ndx && !S_ISDIR(f->mode) ? timestring(F_ATIME(f)) : "";
1170                 const char *crtime_str = crtimes_ndx ? timestring(F_CRTIME(f)) : "";
1171                 const char *arrow, *lnk;
1172
1173                 permstring(permbuf, f->mode);
1174
1175 #ifdef SUPPORT_LINKS
1176                 if (preserve_links && S_ISLNK(f->mode)) {
1177                         arrow = " -> ";
1178                         lnk = F_SYMLINK(f);
1179                 } else
1180 #endif
1181                         arrow = lnk = "";
1182
1183                 rprintf(FINFO, "%s %*s %s%*s%*s %s%s%s\n",
1184                         permbuf, size_width, human_num(F_LENGTH(f)),
1185                         timestring(f->modtime), atime_width, atime_str, crtime_width, crtime_str,
1186                         f_name(f, NULL), arrow, lnk);
1187         }
1188 }
1189
1190 static int phase = 0;
1191 static int dflt_perms;
1192
1193 static int implied_dirs_are_missing;
1194 /* Helper for recv_generator's skip_dir and dry_missing_dir tests. */
1195 static BOOL is_below(struct file_struct *file, struct file_struct *subtree)
1196 {
1197         return F_DEPTH(file) > F_DEPTH(subtree)
1198                 && (!implied_dirs_are_missing || f_name_has_prefix(file, subtree));
1199 }
1200
1201 /* Acts on the indicated item in cur_flist whose name is fname.  If a dir,
1202  * make sure it exists, and has the right permissions/timestamp info.  For
1203  * all other non-regular files (symlinks, etc.) we create them here.  For
1204  * regular files that have changed, we try to find a basis file and then
1205  * start sending checksums.  The ndx is the file's unique index value.
1206  *
1207  * The fname parameter must point to a MAXPATHLEN buffer!  (e.g it gets
1208  * passed to delete_item(), which can use it during a recursive delete.)
1209  *
1210  * Note that f_out is set to -1 when doing final directory-permission and
1211  * modification-time repair. */
1212 static void recv_generator(char *fname, struct file_struct *file, int ndx,
1213                            int itemizing, enum logcode code, int f_out)
1214 {
1215         static const char *parent_dirname = "";
1216         static struct file_struct *prior_dir_file = NULL;
1217         /* Missing dir not created due to --dry-run; will still be scanned. */
1218         static struct file_struct *dry_missing_dir = NULL;
1219         /* Missing dir whose contents are skipped altogether due to
1220          * --ignore-non-existing, daemon exclude, or mkdir failure. */
1221         static struct file_struct *skip_dir = NULL;
1222         static struct file_list *fuzzy_dirlist[MAX_BASIS_DIRS+1];
1223         static int need_fuzzy_dirlist = 0;
1224         struct file_struct *fuzzy_file = NULL;
1225         int fd = -1, f_copy = -1;
1226         stat_x sx, real_sx;
1227         STRUCT_STAT partial_st;
1228         struct file_struct *back_file = NULL;
1229         int statret, real_ret, stat_errno;
1230         char *fnamecmp, *partialptr, *backupptr = NULL;
1231         char fnamecmpbuf[MAXPATHLEN];
1232         uchar fnamecmp_type;
1233         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
1234         int is_dir = !S_ISDIR(file->mode) ? 0
1235                    : inc_recurse && ndx != cur_flist->ndx_start - 1 ? -1
1236                    : 1;
1237
1238         if (DEBUG_GTE(GENR, 1))
1239                 rprintf(FINFO, "recv_generator(%s,%d)\n", fname, ndx);
1240
1241         if (list_only) {
1242                 if (is_dir < 0
1243                  || (is_dir && !implied_dirs && file->flags & FLAG_IMPLIED_DIR))
1244                         return;
1245                 list_file_entry(file);
1246                 return;
1247         }
1248
1249         maybe_ATTRS_ACCURATE_TIME = always_checksum ? ATTRS_ACCURATE_TIME : 0;
1250
1251         if (skip_dir) {
1252                 if (is_below(file, skip_dir)) {
1253                         if (is_dir)
1254                                 file->flags |= FLAG_MISSING_DIR;
1255 #ifdef SUPPORT_HARD_LINKS
1256                         else if (F_IS_HLINKED(file))
1257                                 handle_skipped_hlink(file, itemizing, code, f_out);
1258 #endif
1259                         return;
1260                 }
1261                 skip_dir = NULL;
1262         }
1263
1264         init_stat_x(&sx);
1265         if (daemon_filter_list.head && (*fname != '.' || fname[1])) {
1266                 if (check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
1267                         if (is_dir < 0)
1268                                 return;
1269 #ifdef SUPPORT_HARD_LINKS
1270                         if (F_IS_HLINKED(file))
1271                                 handle_skipped_hlink(file, itemizing, code, f_out);
1272 #endif
1273                         rprintf(FERROR_XFER,
1274                                 "ERROR: daemon refused to receive %s \"%s\"\n",
1275                                 is_dir ? "directory" : "file", fname);
1276                         if (is_dir)
1277                                 goto skipping_dir_contents;
1278                         return;
1279                 }
1280         }
1281         sx.crtime = 0;
1282
1283         if (dry_run > 1 || (dry_missing_dir && is_below(file, dry_missing_dir))) {
1284                 int i;
1285           parent_is_dry_missing:
1286                 for (i = 0; i < fuzzy_basis; i++) {
1287                         if (fuzzy_dirlist[i]) {
1288                                 flist_free(fuzzy_dirlist[i]);
1289                                 fuzzy_dirlist[i] = NULL;
1290                         }
1291                 }
1292                 parent_dirname = "";
1293                 statret = -1;
1294                 stat_errno = ENOENT;
1295         } else {
1296                 const char *dn = file->dirname ? file->dirname : ".";
1297                 dry_missing_dir = NULL;
1298                 if (parent_dirname != dn && strcmp(parent_dirname, dn) != 0) {
1299                         /* Each parent dir must be in the file list or the flist data is bad.
1300                          * Optimization: most of the time the parent dir will be the last dir
1301                          * this function was asked to process in the file list. */
1302                         if (!inc_recurse
1303                          && (*dn != '.' || dn[1]) /* Avoid an issue with --relative and the "." dir. */
1304                          && (!prior_dir_file || strcmp(dn, f_name(prior_dir_file, NULL)) != 0)) {
1305                                 int ok = 0, j = flist_find_name(cur_flist, dn, -1);
1306                                 if (j >= 0) {
1307                                         struct file_struct *f = cur_flist->sorted[j];
1308                                         if (S_ISDIR(f->mode) || (missing_args == 2 && !file->mode && !f->mode))
1309                                                 ok = 1;
1310                                 }
1311                                 /* The --delete-missing-args option can actually put invalid entries into
1312                                  * the file list, so if that option was specified, we'll just complain about
1313                                  * it and allow it. */
1314                                 if (!ok && missing_args == 2 && file->mode == 0 && j < 0)
1315                                         rprintf(FERROR, "WARNING: parent dir is absent in the file list: %s\n", dn);
1316                                 else if (!ok) {
1317                                         rprintf(FERROR, "ABORTING due to invalid path from sender: %s/%s\n",
1318                                                 dn, file->basename);
1319                                         exit_cleanup(RERR_PROTOCOL);
1320                                 }
1321                         }
1322                         if (relative_paths && !implied_dirs && file->mode != 0
1323                          && do_stat(dn, &sx.st) < 0) {
1324                                 if (dry_run)
1325                                         goto parent_is_dry_missing;
1326                                 if (make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0) {
1327                                         rsyserr(FERROR_XFER, errno,
1328                                                 "recv_generator: mkdir %s failed",
1329                                                 full_fname(dn));
1330                                 }
1331                         }
1332                         if (fuzzy_basis) {
1333                                 int i;
1334                                 for (i = 0; i < fuzzy_basis; i++) {
1335                                         if (fuzzy_dirlist[i]) {
1336                                                 flist_free(fuzzy_dirlist[i]);
1337                                                 fuzzy_dirlist[i] = NULL;
1338                                         }
1339                                 }
1340                                 need_fuzzy_dirlist = 1;
1341                         }
1342 #ifdef SUPPORT_ACLS
1343                         if (!preserve_perms)
1344                                 dflt_perms = default_perms_for_dir(dn);
1345 #endif
1346                 }
1347                 parent_dirname = dn;
1348
1349                 statret = link_stat(fname, &sx.st, keep_dirlinks && is_dir);
1350                 stat_errno = errno;
1351         }
1352
1353         if (missing_args == 2 && file->mode == 0) {
1354                 if (filter_list.head && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
1355                         return;
1356                 if (statret == 0)
1357                         delete_item(fname, sx.st.st_mode, del_opts);
1358                 return;
1359         }
1360
1361         if (ignore_non_existing > 0 && statret == -1 && stat_errno == ENOENT) {
1362                 if (is_dir) {
1363                         if (is_dir < 0)
1364                                 return;
1365                         skip_dir = file;
1366                         file->flags |= FLAG_MISSING_DIR;
1367                 }
1368 #ifdef SUPPORT_HARD_LINKS
1369                 else if (F_IS_HLINKED(file))
1370                         handle_skipped_hlink(file, itemizing, code, f_out);
1371 #endif
1372                 if (INFO_GTE(SKIP, 1)) {
1373                         rprintf(FINFO, "not creating new %s \"%s\"\n",
1374                                 is_dir ? "directory" : "file", fname);
1375                 }
1376                 return;
1377         }
1378
1379         if (statret == 0 && !(sx.st.st_mode & S_IWUSR)
1380          && !am_root && sx.st.st_uid == our_uid)
1381                 del_opts |= DEL_NO_UID_WRITE;
1382
1383         if (ignore_existing > 0 && statret == 0
1384          && (!is_dir || !S_ISDIR(sx.st.st_mode))) {
1385                 if (INFO_GTE(SKIP, 1) && is_dir >= 0)
1386                         rprintf(FINFO, "%s exists\n", fname);
1387 #ifdef SUPPORT_HARD_LINKS
1388                 if (F_IS_HLINKED(file))
1389                         handle_skipped_hlink(file, itemizing, code, f_out);
1390 #endif
1391                 goto cleanup;
1392         }
1393
1394         fnamecmp = fname;
1395
1396         if (is_dir) {
1397                 mode_t added_perms;
1398                 if (!implied_dirs && file->flags & FLAG_IMPLIED_DIR)
1399                         goto cleanup;
1400                 if (am_root < 0) {
1401                         /* For --fake-super, the dir must be useable by the copying
1402                          * user, just like it would be for root. */
1403                         added_perms = S_IRUSR|S_IWUSR|S_IXUSR;
1404                 } else
1405                         added_perms = 0;
1406                 if (is_dir < 0) {
1407                         if (!(preserve_times & PRESERVE_DIR_TIMES))
1408                                 goto cleanup;
1409                         /* In inc_recurse mode we want to make sure any missing
1410                          * directories get created while we're still processing
1411                          * the parent dir (which allows us to touch the parent
1412                          * dir's mtime right away).  We will handle the dir in
1413                          * full later (right before we handle its contents). */
1414                         if (statret == 0
1415                          && (S_ISDIR(sx.st.st_mode)
1416                           || delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0))
1417                                 goto cleanup; /* Any errors get reported later. */
1418                         if (do_mkdir(fname, (file->mode|added_perms) & 0700) == 0)
1419                                 file->flags |= FLAG_DIR_CREATED;
1420                         goto cleanup;
1421                 }
1422                 /* The file to be received is a directory, so we need
1423                  * to prepare appropriately.  If there is already a
1424                  * file of that name and it is *not* a directory, then
1425                  * we need to delete it.  If it doesn't exist, then
1426                  * (perhaps recursively) create it. */
1427                 if (statret == 0 && !S_ISDIR(sx.st.st_mode)) {
1428                         if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_DIR) != 0)
1429                                 goto skipping_dir_contents;
1430                         statret = -1;
1431                 }
1432                 if (dry_run && statret != 0) {
1433                         if (!dry_missing_dir)
1434                                 dry_missing_dir = file;
1435                         file->flags |= FLAG_MISSING_DIR;
1436                 }
1437                 init_stat_x(&real_sx);
1438                 real_sx.st = sx.st;
1439                 real_ret = statret;
1440                 if (file->flags & FLAG_DIR_CREATED)
1441                         statret = -1;
1442                 if (!preserve_perms) { /* See comment in non-dir code below. */
1443                         file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, statret == 0);
1444                 }
1445                 if (statret != 0 && basis_dir[0] != NULL) {
1446                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1447                         if (j == -2) {
1448                                 itemizing = 0;
1449                                 code = FNONE;
1450                                 statret = 1;
1451                         } else if (j >= 0) {
1452                                 statret = 1;
1453                                 fnamecmp = fnamecmpbuf;
1454                         }
1455                 }
1456                 if (itemizing && f_out != -1) {
1457                         itemize(fnamecmp, file, ndx, statret, &sx,
1458                                 statret ? ITEM_LOCAL_CHANGE : 0, 0, NULL);
1459                 }
1460                 if (real_ret != 0 && do_mkdir(fname,file->mode|added_perms) < 0 && errno != EEXIST) {
1461                         if (!relative_paths || errno != ENOENT
1462                          || make_path(fname, MKP_DROP_NAME | MKP_SKIP_SLASH) < 0
1463                          || (do_mkdir(fname, file->mode|added_perms) < 0 && errno != EEXIST)) {
1464                                 rsyserr(FERROR_XFER, errno,
1465                                         "recv_generator: mkdir %s failed",
1466                                         full_fname(fname));
1467                           skipping_dir_contents:
1468                                 rprintf(FERROR, "*** Skipping any contents from this failed directory ***\n");
1469                                 skip_dir = file;
1470                                 file->flags |= FLAG_MISSING_DIR;
1471                                 goto cleanup;
1472                         }
1473                 }
1474
1475 #ifdef SUPPORT_XATTRS
1476                 if (preserve_xattrs && statret == 1)
1477                         copy_xattrs(fnamecmpbuf, fname);
1478 #endif
1479                 if (set_file_attrs(fname, file, real_ret ? NULL : &real_sx, NULL, 0)
1480                  && INFO_GTE(NAME, 1) && code != FNONE && f_out != -1)
1481                         rprintf(code, "%s/\n", fname);
1482
1483                 /* We need to ensure that the dirs in the transfer have both
1484                  * readable and writable permissions during the time we are
1485                  * putting files within them.  This is then restored to the
1486                  * former permissions after the transfer is done. */
1487 #ifdef HAVE_CHMOD
1488                 if (!am_root && (file->mode & S_IRWXU) != S_IRWXU && dir_tweaking) {
1489                         mode_t mode = file->mode | S_IRWXU;
1490                         if (do_chmod(fname, mode) < 0) {
1491                                 rsyserr(FERROR_XFER, errno,
1492                                         "failed to modify permissions on %s",
1493                                         full_fname(fname));
1494                         }
1495                         need_retouch_dir_perms = 1;
1496                 }
1497 #endif
1498
1499                 if (real_ret != 0 && one_file_system)
1500                         real_sx.st.st_dev = filesystem_dev;
1501                 if (inc_recurse) {
1502                         if (one_file_system) {
1503                                 uint32 *devp = F_DIR_DEV_P(file);
1504                                 DEV_MAJOR(devp) = major(real_sx.st.st_dev);
1505                                 DEV_MINOR(devp) = minor(real_sx.st.st_dev);
1506                         }
1507                 }
1508                 else if (delete_during && f_out != -1 && !phase
1509                     && !(file->flags & FLAG_MISSING_DIR)) {
1510                         if (file->flags & FLAG_CONTENT_DIR)
1511                                 delete_in_dir(fname, file, &real_sx.st.st_dev);
1512                         else
1513                                 change_local_filter_dir(fname, strlen(fname), F_DEPTH(file));
1514                 }
1515                 prior_dir_file = file;
1516                 goto cleanup;
1517         }
1518
1519         /* If we're not preserving permissions, change the file-list's
1520          * mode based on the local permissions and some heuristics. */
1521         if (!preserve_perms) {
1522                 int exists = statret == 0 && !S_ISDIR(sx.st.st_mode);
1523                 file->mode = dest_mode(file->mode, sx.st.st_mode, dflt_perms, exists);
1524         }
1525
1526 #ifdef SUPPORT_HARD_LINKS
1527         if (preserve_hard_links && F_HLINK_NOT_FIRST(file)
1528          && hard_link_check(file, ndx, fname, statret, &sx, itemizing, code))
1529                 goto cleanup;
1530 #endif
1531
1532         if (preserve_links && S_ISLNK(file->mode)) {
1533 #ifdef SUPPORT_LINKS
1534                 const char *sl = F_SYMLINK(file);
1535                 if (safe_symlinks && unsafe_symlink(sl, fname)) {
1536                         if (INFO_GTE(NAME, 1)) {
1537                                 if (solo_file) {
1538                                         /* fname contains the destination path, but we
1539                                          * want to report the source path. */
1540                                         fname = f_name(file, NULL);
1541                                 }
1542                                 rprintf(FINFO,
1543                                         "ignoring unsafe symlink \"%s\" -> \"%s\"\n",
1544                                         fname, sl);
1545                         }
1546                         goto cleanup;
1547                 }
1548                 if (statret == 0) {
1549                         char lnk[MAXPATHLEN];
1550                         int len;
1551
1552                         if (S_ISLNK(sx.st.st_mode)
1553                          && (len = do_readlink(fname, lnk, MAXPATHLEN-1)) > 0
1554                          && strncmp(lnk, sl, len) == 0 && sl[len] == '\0') {
1555                                 /* The link is pointing to the right place. */
1556                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1557                                 if (itemizing)
1558                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1559 #ifdef SUPPORT_HARD_LINKS
1560                                 if (preserve_hard_links && F_IS_HLINKED(file))
1561                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1562 #endif
1563                                 if (remove_source_files == 1)
1564                                         goto return_with_success;
1565                                 goto cleanup;
1566                         }
1567                 } else if (basis_dir[0] != NULL) {
1568                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1569                         if (j == -2) {
1570 #ifndef CAN_HARDLINK_SYMLINK
1571                                 if (alt_dest_type == LINK_DEST) {
1572                                         /* Resort to --copy-dest behavior. */
1573                                 } else
1574 #endif
1575                                 if (alt_dest_type != COPY_DEST)
1576                                         goto cleanup;
1577                                 itemizing = 0;
1578                                 code = FNONE;
1579                         } else if (j >= 0) {
1580                                 statret = 1;
1581                                 fnamecmp = fnamecmpbuf;
1582                         }
1583                 }
1584                 if (atomic_create(file, fname, sl, NULL, MAKEDEV(0, 0), &sx, statret == 0 ? DEL_FOR_SYMLINK : 0)) {
1585                         set_file_attrs(fname, file, NULL, NULL, 0);
1586                         if (itemizing) {
1587                                 if (statret == 0 && !S_ISLNK(sx.st.st_mode))
1588                                         statret = -1;
1589                                 itemize(fnamecmp, file, ndx, statret, &sx,
1590                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1591                         }
1592                         if (code != FNONE && INFO_GTE(NAME, 1))
1593                                 rprintf(code, "%s -> %s\n", fname, sl);
1594 #ifdef SUPPORT_HARD_LINKS
1595                         if (preserve_hard_links && F_IS_HLINKED(file))
1596                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1597 #endif
1598                         /* This does not check remove_source_files == 1
1599                          * because this is one of the items that the old
1600                          * --remove-sent-files option would remove. */
1601                         if (remove_source_files)
1602                                 goto return_with_success;
1603                 }
1604 #endif
1605                 goto cleanup;
1606         }
1607
1608         if ((am_root && preserve_devices && IS_DEVICE(file->mode))
1609          || (preserve_specials && IS_SPECIAL(file->mode))) {
1610                 dev_t rdev;
1611                 int del_for_flag = 0;
1612                 if (IS_DEVICE(file->mode)) {
1613                         uint32 *devp = F_RDEV_P(file);
1614                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
1615                 } else
1616                         rdev = 0;
1617                 if (statret == 0) {
1618                         if (IS_DEVICE(file->mode)) {
1619                                 if (!IS_DEVICE(sx.st.st_mode))
1620                                         statret = -1;
1621                                 del_for_flag = DEL_FOR_DEVICE;
1622                         } else {
1623                                 if (!IS_SPECIAL(sx.st.st_mode))
1624                                         statret = -1;
1625                                 del_for_flag = DEL_FOR_SPECIAL;
1626                         }
1627                         if (statret == 0
1628                          && BITS_EQUAL(sx.st.st_mode, file->mode, _S_IFMT)
1629                          && (IS_SPECIAL(sx.st.st_mode) || sx.st.st_rdev == rdev)) {
1630                                 /* The device or special file is identical. */
1631                                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT);
1632                                 if (itemizing)
1633                                         itemize(fname, file, ndx, 0, &sx, 0, 0, NULL);
1634 #ifdef SUPPORT_HARD_LINKS
1635                                 if (preserve_hard_links && F_IS_HLINKED(file))
1636                                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1637 #endif
1638                                 if (remove_source_files == 1)
1639                                         goto return_with_success;
1640                                 goto cleanup;
1641                         }
1642                 } else if (basis_dir[0] != NULL) {
1643                         int j = try_dests_non(file, fname, ndx, fnamecmpbuf, &sx, itemizing, code);
1644                         if (j == -2) {
1645 #ifndef CAN_HARDLINK_SPECIAL
1646                                 if (alt_dest_type == LINK_DEST) {
1647                                         /* Resort to --copy-dest behavior. */
1648                                 } else
1649 #endif
1650                                 if (alt_dest_type != COPY_DEST)
1651                                         goto cleanup;
1652                                 itemizing = 0;
1653                                 code = FNONE;
1654                         } else if (j >= 0) {
1655                                 statret = 1;
1656                                 fnamecmp = fnamecmpbuf;
1657                         }
1658                 }
1659                 if (DEBUG_GTE(GENR, 1)) {
1660                         rprintf(FINFO, "mknod(%s, 0%o, [%ld,%ld])\n",
1661                                 fname, (int)file->mode,
1662                                 (long)major(rdev), (long)minor(rdev));
1663                 }
1664                 if (atomic_create(file, fname, NULL, NULL, rdev, &sx, del_for_flag)) {
1665                         set_file_attrs(fname, file, NULL, NULL, 0);
1666                         if (itemizing) {
1667                                 itemize(fnamecmp, file, ndx, statret, &sx,
1668                                         ITEM_LOCAL_CHANGE|ITEM_REPORT_CHANGE, 0, NULL);
1669                         }
1670                         if (code != FNONE && INFO_GTE(NAME, 1))
1671                                 rprintf(code, "%s\n", fname);
1672 #ifdef SUPPORT_HARD_LINKS
1673                         if (preserve_hard_links && F_IS_HLINKED(file))
1674                                 finish_hard_link(file, fname, ndx, NULL, itemizing, code, -1);
1675 #endif
1676                         if (remove_source_files == 1)
1677                                 goto return_with_success;
1678                 }
1679                 goto cleanup;
1680         }
1681
1682         if (!S_ISREG(file->mode)) {
1683                 if (solo_file)
1684                         fname = f_name(file, NULL);
1685                 rprintf(FINFO, "skipping non-regular file \"%s\"\n", fname);
1686                 goto cleanup;
1687         }
1688
1689         if (max_size >= 0 && F_LENGTH(file) > max_size) {
1690                 if (INFO_GTE(SKIP, 1)) {
1691                         if (solo_file)
1692                                 fname = f_name(file, NULL);
1693                         rprintf(FINFO, "%s is over max-size\n", fname);
1694                 }
1695                 goto cleanup;
1696         }
1697         if (min_size >= 0 && F_LENGTH(file) < min_size) {
1698                 if (INFO_GTE(SKIP, 1)) {
1699                         if (solo_file)
1700                                 fname = f_name(file, NULL);
1701                         rprintf(FINFO, "%s is under min-size\n", fname);
1702                 }
1703                 goto cleanup;
1704         }
1705
1706         if (update_only > 0 && statret == 0 && file->modtime - sx.st.st_mtime <= modify_window) {
1707                 if (INFO_GTE(SKIP, 1))
1708                         rprintf(FINFO, "%s is newer\n", fname);
1709 #ifdef SUPPORT_HARD_LINKS
1710                 if (F_IS_HLINKED(file))
1711                         handle_skipped_hlink(file, itemizing, code, f_out);
1712 #endif
1713                 goto cleanup;
1714         }
1715
1716         fnamecmp_type = FNAMECMP_FNAME;
1717
1718         if (statret == 0 && !(S_ISREG(sx.st.st_mode) || (write_devices && IS_DEVICE(sx.st.st_mode)))) {
1719                 if (delete_item(fname, sx.st.st_mode, del_opts | DEL_FOR_FILE) != 0)
1720                         goto cleanup;
1721                 statret = -1;
1722                 stat_errno = ENOENT;
1723         }
1724
1725         if (basis_dir[0] != NULL && (statret != 0 || alt_dest_type != COPY_DEST)) {
1726                 int j = try_dests_reg(file, fname, ndx, fnamecmpbuf, &sx, statret == 0, itemizing, code);
1727                 if (j == -2) {
1728                         if (remove_source_files == 1)
1729                                 goto return_with_success;
1730                         goto cleanup;
1731                 }
1732                 if (j >= 0) {
1733                         fnamecmp = fnamecmpbuf;
1734                         fnamecmp_type = j;
1735                         statret = 0;
1736                 }
1737         }
1738
1739         init_stat_x(&real_sx);
1740         real_sx.st = sx.st; /* Don't copy xattr/acl pointers, as they would free wrong. */
1741         real_ret = statret;
1742
1743         if (partial_dir && (partialptr = partial_dir_fname(fname)) != NULL
1744          && link_stat(partialptr, &partial_st, 0) == 0
1745          && S_ISREG(partial_st.st_mode)) {
1746                 if (statret != 0)
1747                         goto prepare_to_open;
1748         } else
1749                 partialptr = NULL;
1750
1751         if (statret != 0 && fuzzy_basis) {
1752                 if (need_fuzzy_dirlist && S_ISREG(file->mode)) {
1753                         const char *dn = file->dirname ? file->dirname : ".";
1754                         int i;
1755                         strlcpy(fnamecmpbuf, dn, sizeof fnamecmpbuf);
1756                         for (i = 0; i < fuzzy_basis; i++) {
1757                                 if (i && pathjoin(fnamecmpbuf, MAXPATHLEN, basis_dir[i-1], dn) >= MAXPATHLEN)
1758                                         continue;
1759                                 fuzzy_dirlist[i] = get_dirlist(fnamecmpbuf, -1, GDL_IGNORE_FILTER_RULES | GDL_PERHAPS_DIR);
1760                                 if (fuzzy_dirlist[i] && fuzzy_dirlist[i]->used == 0) {
1761                                         flist_free(fuzzy_dirlist[i]);
1762                                         fuzzy_dirlist[i] = NULL;
1763                                 }
1764                         }
1765                         need_fuzzy_dirlist = 0;
1766                 }
1767
1768                 /* Sets fnamecmp_type to FNAMECMP_FUZZY or above. */
1769                 fuzzy_file = find_fuzzy(file, fuzzy_dirlist, &fnamecmp_type);
1770                 if (fuzzy_file) {
1771                         f_name(fuzzy_file, fnamecmpbuf);
1772                         if (DEBUG_GTE(FUZZY, 1)) {
1773                                 rprintf(FINFO, "fuzzy basis selected for %s: %s\n",
1774                                         fname, fnamecmpbuf);
1775                         }
1776                         sx.st.st_size = F_LENGTH(fuzzy_file);
1777                         statret = 0;
1778                         fnamecmp = fnamecmpbuf;
1779                 }
1780         }
1781
1782         if (statret != 0) {
1783 #ifdef SUPPORT_HARD_LINKS
1784                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1785                         cur_flist->in_progress++;
1786                         goto cleanup;
1787                 }
1788 #endif
1789                 if (stat_errno == ENOENT)
1790                         goto notify_others;
1791                 rsyserr(FERROR_XFER, stat_errno, "recv_generator: failed to stat %s",
1792                         full_fname(fname));
1793                 goto cleanup;
1794         }
1795
1796         if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
1797                 ;
1798         else if (fnamecmp_type >= FNAMECMP_FUZZY)
1799                 ;
1800         else if (unchanged_file(fnamecmp, file, &sx.st)) {
1801                 if (partialptr) {
1802                         do_unlink(partialptr);
1803                         handle_partial_dir(partialptr, PDIR_DELETE);
1804                 }
1805                 set_file_attrs(fname, file, &sx, NULL, maybe_ATTRS_REPORT | maybe_ATTRS_ACCURATE_TIME);
1806                 if (itemizing)
1807                         itemize(fnamecmp, file, ndx, statret, &sx, 0, 0, NULL);
1808 #ifdef SUPPORT_HARD_LINKS
1809                 if (preserve_hard_links && F_IS_HLINKED(file))
1810                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1811 #endif
1812                 if (remove_source_files != 1)
1813                         goto cleanup;
1814           return_with_success:
1815                 if (!dry_run)
1816                         send_msg_int(MSG_SUCCESS, ndx);
1817                 goto cleanup;
1818         }
1819
1820         if (append_mode > 0 && sx.st.st_size >= F_LENGTH(file)) {
1821 #ifdef SUPPORT_HARD_LINKS
1822                 if (F_IS_HLINKED(file))
1823                         handle_skipped_hlink(file, itemizing, code, f_out);
1824 #endif
1825                 goto cleanup;
1826         }
1827
1828   prepare_to_open:
1829         if (partialptr) {
1830                 sx.st = partial_st;
1831                 fnamecmp = partialptr;
1832                 fnamecmp_type = FNAMECMP_PARTIAL_DIR;
1833                 statret = 0;
1834         }
1835
1836         if (!do_xfers)
1837                 goto notify_others;
1838
1839         if (read_batch || whole_file) {
1840                 if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1841                         if (!(backupptr = get_backup_name(fname)))
1842                                 goto cleanup;
1843                         if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS)))
1844                                 goto pretend_missing;
1845                         if (copy_file(fname, backupptr, -1, back_file->mode) < 0) {
1846                                 unmake_file(back_file);
1847                                 back_file = NULL;
1848                                 goto cleanup;
1849                         }
1850                 }
1851                 goto notify_others;
1852         }
1853
1854         if (fuzzy_dirlist[0]) {
1855                 int j = flist_find(fuzzy_dirlist[0], file);
1856                 if (j >= 0) /* don't use changing file as future fuzzy basis */
1857                         fuzzy_dirlist[0]->files[j]->flags |= FLAG_FILE_SENT;
1858         }
1859
1860         /* open the file */
1861         if ((fd = do_open(fnamecmp, O_RDONLY, 0)) < 0) {
1862                 rsyserr(FERROR, errno, "failed to open %s, continuing",
1863                         full_fname(fnamecmp));
1864           pretend_missing:
1865                 /* pretend the file didn't exist */
1866 #ifdef SUPPORT_HARD_LINKS
1867                 if (preserve_hard_links && F_HLINK_NOT_LAST(file)) {
1868                         cur_flist->in_progress++;
1869                         goto cleanup;
1870                 }
1871 #endif
1872                 statret = real_ret = -1;
1873                 goto notify_others;
1874         }
1875
1876         if (inplace && make_backups > 0 && fnamecmp_type == FNAMECMP_FNAME) {
1877                 if (!(backupptr = get_backup_name(fname))) {
1878                         close(fd);
1879                         goto cleanup;
1880                 }
1881                 if (!(back_file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) {
1882                         close(fd);
1883                         goto pretend_missing;
1884                 }
1885                 if (robust_unlink(backupptr) && errno != ENOENT) {
1886                         rsyserr(FERROR_XFER, errno, "unlink %s",
1887                                 full_fname(backupptr));
1888                         unmake_file(back_file);
1889                         back_file = NULL;
1890                         close(fd);
1891                         goto cleanup;
1892                 }
1893                 if ((f_copy = do_open(backupptr, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, 0600)) < 0) {
1894                         rsyserr(FERROR_XFER, errno, "open %s", full_fname(backupptr));
1895                         unmake_file(back_file);
1896                         back_file = NULL;
1897                         close(fd);
1898                         goto cleanup;
1899                 }
1900                 fnamecmp_type = FNAMECMP_BACKUP;
1901         }
1902
1903         if (DEBUG_GTE(DELTASUM, 3)) {
1904                 rprintf(FINFO, "gen mapped %s of size %s\n",
1905                         fnamecmp, big_num(sx.st.st_size));
1906         }
1907
1908         if (DEBUG_GTE(DELTASUM, 2))
1909                 rprintf(FINFO, "generating and sending sums for %d\n", ndx);
1910
1911   notify_others:
1912         if (remove_source_files && !delay_updates && !phase && !dry_run)
1913                 increment_active_files(ndx, itemizing, code);
1914         if (inc_recurse && (!dry_run || write_batch < 0))
1915                 cur_flist->in_progress++;
1916 #ifdef SUPPORT_HARD_LINKS
1917         if (preserve_hard_links && F_IS_HLINKED(file))
1918                 file->flags |= FLAG_FILE_SENT;
1919 #endif
1920         write_ndx(f_out, ndx);
1921         if (itemizing) {
1922                 int iflags = ITEM_TRANSFER;
1923                 if (always_checksum > 0)
1924                         iflags |= ITEM_REPORT_CHANGE;
1925                 if (fnamecmp_type != FNAMECMP_FNAME)
1926                         iflags |= ITEM_BASIS_TYPE_FOLLOWS;
1927                 if (fnamecmp_type >= FNAMECMP_FUZZY)
1928                         iflags |= ITEM_XNAME_FOLLOWS;
1929                 itemize(fnamecmp, file, -1, real_ret, &real_sx, iflags, fnamecmp_type,
1930                         fuzzy_file ? fuzzy_file->basename : NULL);
1931                 free_stat_x(&real_sx);
1932         }
1933
1934         if (!do_xfers) {
1935 #ifdef SUPPORT_HARD_LINKS
1936                 if (preserve_hard_links && F_IS_HLINKED(file))
1937                         finish_hard_link(file, fname, ndx, &sx.st, itemizing, code, -1);
1938 #endif
1939                 goto cleanup;
1940         }
1941         if (read_batch)
1942                 goto cleanup;
1943
1944         if (statret != 0 || whole_file)
1945                 write_sum_head(f_out, NULL);
1946         else if (sx.st.st_size <= 0) {
1947                 write_sum_head(f_out, NULL);
1948                 close(fd);
1949         } else {
1950                 if (generate_and_send_sums(fd, sx.st.st_size, f_out, f_copy) < 0) {
1951                         rprintf(FWARNING,
1952                                 "WARNING: file is too large for checksum sending: %s\n",
1953                                 fnamecmp);
1954                         write_sum_head(f_out, NULL);
1955                 }
1956                 close(fd);
1957         }
1958
1959   cleanup:
1960         if (back_file) {
1961                 int save_preserve_xattrs = preserve_xattrs;
1962                 if (f_copy >= 0)
1963                         close(f_copy);
1964 #ifdef SUPPORT_XATTRS
1965                 if (preserve_xattrs) {
1966                         copy_xattrs(fname, backupptr);
1967                         preserve_xattrs = 0;
1968                 }
1969 #endif
1970                 set_file_attrs(backupptr, back_file, NULL, NULL, 0);
1971                 preserve_xattrs = save_preserve_xattrs;
1972                 if (INFO_GTE(BACKUP, 1)) {
1973                         rprintf(FINFO, "backed up %s to %s\n",
1974                                 fname, backupptr);
1975                 }
1976                 unmake_file(back_file);
1977         }
1978
1979         free_stat_x(&sx);
1980 }
1981
1982 /* If we are replacing an existing hard link, symlink, device, or special file,
1983  * create a temp-name item and rename it into place.  A symlimk specifies slnk,
1984  * a hard link specifies hlnk, otherwise we create a device based on rdev.
1985  * Specify 0 for the del_for_flag if there is not a file to replace.  This
1986  * returns 1 on success and 0 on failure. */
1987 int atomic_create(struct file_struct *file, char *fname, const char *slnk, const char *hlnk,
1988                   dev_t rdev, stat_x *sxp, int del_for_flag)
1989 {
1990         char tmpname[MAXPATHLEN];
1991         const char *create_name;
1992         int skip_atomic, dir_in_the_way = del_for_flag && S_ISDIR(sxp->st.st_mode);
1993
1994         if (!del_for_flag || dir_in_the_way || tmpdir || !get_tmpname(tmpname, fname, True))
1995                 skip_atomic = 1;
1996         else
1997                 skip_atomic = 0;
1998
1999         if (del_for_flag) {
2000                 if (make_backups > 0 && !dir_in_the_way) {
2001                         if (!make_backup(fname, skip_atomic))
2002                                 return 0;
2003                 } else if (skip_atomic) {
2004                         int del_opts = delete_mode || force_delete ? DEL_RECURSE : 0;
2005                         if (delete_item(fname, sxp->st.st_mode, del_opts | del_for_flag) != 0)
2006                                 return 0;
2007                 }
2008         }
2009
2010         create_name = skip_atomic ? fname : tmpname;
2011
2012         if (slnk) {
2013 #ifdef SUPPORT_LINKS
2014                 if (do_symlink(slnk, create_name) < 0) {
2015                         rsyserr(FERROR_XFER, errno, "symlink %s -> \"%s\" failed",
2016                                 full_fname(create_name), slnk);
2017                         return 0;
2018                 }
2019 #else
2020                 return 0;
2021 #endif
2022         } else if (hlnk) {
2023 #ifdef SUPPORT_HARD_LINKS
2024                 if (!hard_link_one(file, create_name, hlnk, 0))
2025                         return 0;
2026 #else
2027                 return 0;
2028 #endif
2029         } else {
2030                 if (do_mknod(create_name, file->mode, rdev) < 0) {
2031                         rsyserr(FERROR_XFER, errno, "mknod %s failed",
2032                                 full_fname(create_name));
2033                         return 0;
2034                 }
2035         }
2036
2037         if (!skip_atomic) {
2038                 if (do_rename(tmpname, fname) < 0) {
2039                         rsyserr(FERROR_XFER, errno, "rename %s -> \"%s\" failed",
2040                                 full_fname(tmpname), full_fname(fname));
2041                         do_unlink(tmpname);
2042                         return 0;
2043                 }
2044         }
2045
2046         return 1;
2047 }
2048
2049 #ifdef SUPPORT_HARD_LINKS
2050 static void handle_skipped_hlink(struct file_struct *file, int itemizing,
2051                                  enum logcode code, int f_out)
2052 {
2053         char fbuf[MAXPATHLEN];
2054         int new_last_ndx;
2055         struct file_list *save_flist = cur_flist;
2056
2057         /* If we skip the last item in a chain of links and there was a
2058          * prior non-skipped hard-link waiting to finish, finish it now. */
2059         if ((new_last_ndx = skip_hard_link(file, &cur_flist)) < 0)
2060                 return;
2061
2062         file = cur_flist->files[new_last_ndx - cur_flist->ndx_start];
2063         cur_flist->in_progress--; /* undo prior increment */
2064         f_name(file, fbuf);
2065         recv_generator(fbuf, file, new_last_ndx, itemizing, code, f_out);
2066
2067         cur_flist = save_flist;
2068 }
2069 #endif
2070
2071 static void touch_up_dirs(struct file_list *flist, int ndx)
2072 {
2073         static int counter = 0;
2074         struct file_struct *file;
2075         char *fname;
2076         BOOL fix_dir_perms;
2077         int i, start, end;
2078
2079         if (ndx < 0) {
2080                 start = 0;
2081                 end = flist->used - 1;
2082         } else
2083                 start = end = ndx;
2084
2085         /* Fix any directory permissions that were modified during the
2086          * transfer and/or re-set any tweaked modified-time values. */
2087         for (i = start; i <= end; i++, counter++) {
2088                 file = flist->files[i];
2089                 if (!F_IS_ACTIVE(file))
2090                         continue;
2091                 if (!S_ISDIR(file->mode)
2092                  || (!implied_dirs && file->flags & FLAG_IMPLIED_DIR))
2093                         continue;
2094                 if (DEBUG_GTE(TIME, 2)) {
2095                         fname = f_name(file, NULL);
2096                         rprintf(FINFO, "touch_up_dirs: %s (%d)\n",
2097                                 NS(fname), i);
2098                 }
2099                 /* Be sure not to retouch permissions with --fake-super. */
2100                 fix_dir_perms = !am_root && !(file->mode & S_IWUSR);
2101                 if (file->flags & FLAG_MISSING_DIR || !(need_retouch_dir_times || fix_dir_perms))
2102                         continue;
2103                 fname = f_name(file, NULL);
2104                 if (fix_dir_perms)
2105                         do_chmod(fname, file->mode);
2106                 if (need_retouch_dir_times) {
2107                         STRUCT_STAT st;
2108                         if (link_stat(fname, &st, 0) == 0 && mtime_differs(&st, file)) {
2109                                 st.st_mtime = file->modtime;
2110 #ifdef ST_MTIME_NSEC
2111                                 st.ST_MTIME_NSEC = F_MOD_NSEC_or_0(file);
2112 #endif
2113                                 set_times(fname, &st);
2114                         }
2115                 }
2116                 if (counter >= loopchk_limit) {
2117                         if (allowed_lull)
2118                                 maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2119                         else
2120                                 maybe_flush_socket(0);
2121                         counter = 0;
2122                 }
2123         }
2124 }
2125
2126 void check_for_finished_files(int itemizing, enum logcode code, int check_redo)
2127 {
2128         struct file_struct *file;
2129         struct file_list *flist;
2130         char fbuf[MAXPATHLEN];
2131         int ndx;
2132
2133         while (1) {
2134 #ifdef SUPPORT_HARD_LINKS
2135                 if (preserve_hard_links && (ndx = get_hlink_num()) != -1) {
2136                         int send_failed = (ndx == -2);
2137                         if (send_failed)
2138                                 ndx = get_hlink_num();
2139                         flist = flist_for_ndx(ndx, "check_for_finished_files.1");
2140                         file = flist->files[ndx - flist->ndx_start];
2141                         assert(file->flags & FLAG_HLINKED);
2142                         if (send_failed)
2143                                 handle_skipped_hlink(file, itemizing, code, sock_f_out);
2144                         else
2145                                 finish_hard_link(file, f_name(file, fbuf), ndx, NULL, itemizing, code, -1);
2146                         flist->in_progress--;
2147                         continue;
2148                 }
2149 #endif
2150
2151                 if (check_redo && (ndx = get_redo_num()) != -1) {
2152                         OFF_T save_max_size = max_size;
2153                         OFF_T save_min_size = min_size;
2154                         csum_length = SUM_LENGTH;
2155                         max_size = -1;
2156                         min_size = -1;
2157                         ignore_existing = -ignore_existing;
2158                         ignore_non_existing = -ignore_non_existing;
2159                         update_only = -update_only;
2160                         always_checksum = -always_checksum;
2161                         size_only = -size_only;
2162                         append_mode = -append_mode;
2163                         make_backups = -make_backups; /* avoid dup backup w/inplace */
2164                         ignore_times++;
2165
2166                         flist = cur_flist;
2167                         cur_flist = flist_for_ndx(ndx, "check_for_finished_files.2");
2168
2169                         file = cur_flist->files[ndx - cur_flist->ndx_start];
2170                         if (solo_file)
2171                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2172                         else
2173                                 f_name(file, fbuf);
2174                         recv_generator(fbuf, file, ndx, itemizing, code, sock_f_out);
2175                         cur_flist->to_redo--;
2176
2177                         cur_flist = flist;
2178
2179                         csum_length = SHORT_SUM_LENGTH;
2180                         max_size = save_max_size;
2181                         min_size = save_min_size;
2182                         ignore_existing = -ignore_existing;
2183                         ignore_non_existing = -ignore_non_existing;
2184                         update_only = -update_only;
2185                         always_checksum = -always_checksum;
2186                         size_only = -size_only;
2187                         append_mode = -append_mode;
2188                         make_backups = -make_backups;
2189                         ignore_times--;
2190                         continue;
2191                 }
2192
2193                 if (cur_flist == first_flist)
2194                         break;
2195
2196                 /* We only get here if inc_recurse is enabled. */
2197                 if (first_flist->in_progress || first_flist->to_redo)
2198                         break;
2199
2200                 write_ndx(sock_f_out, NDX_DONE);
2201                 if (!read_batch && !flist_eof) {
2202                         int old_total = 0;
2203                         for (flist = first_flist; flist != cur_flist; flist = flist->next)
2204                                 old_total += flist->used;
2205                         maybe_flush_socket(!flist_eof && file_total - old_total < MIN_FILECNT_LOOKAHEAD/2);
2206                 }
2207
2208                 if (delete_during == 2 || !dir_tweaking) {
2209                         /* Skip directory touch-up. */
2210                 } else if (first_flist->parent_ndx >= 0)
2211                         touch_up_dirs(dir_flist, first_flist->parent_ndx);
2212
2213                 flist_free(first_flist); /* updates first_flist */
2214         }
2215 }
2216
2217 void generate_files(int f_out, const char *local_name)
2218 {
2219         int i, ndx, next_loopchk = 0;
2220         char fbuf[MAXPATHLEN];
2221         int itemizing;
2222         enum logcode code;
2223         int save_info_flist = info_levels[INFO_FLIST];
2224         int save_info_progress = info_levels[INFO_PROGRESS];
2225
2226         if (protocol_version >= 29) {
2227                 itemizing = 1;
2228                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2229                 code = logfile_format_has_i ? FNONE : FLOG;
2230         } else if (am_daemon) {
2231                 itemizing = logfile_format_has_i && do_xfers;
2232                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2233                 code = itemizing || !do_xfers ? FCLIENT : FINFO;
2234         } else if (!am_server) {
2235                 itemizing = stdout_format_has_i;
2236                 maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
2237                 code = itemizing ? FNONE : FINFO;
2238         } else {
2239                 itemizing = 0;
2240                 maybe_ATTRS_REPORT = ATTRS_REPORT;
2241                 code = FINFO;
2242         }
2243         solo_file = local_name;
2244         dir_tweaking = !(list_only || solo_file || dry_run);
2245         need_retouch_dir_times = preserve_times & PRESERVE_DIR_TIMES;
2246         loopchk_limit = allowed_lull ? allowed_lull * 5 : 200;
2247         symlink_timeset_failed_flags = ITEM_REPORT_TIME
2248             | (protocol_version >= 30 || !am_server ? ITEM_REPORT_TIMEFAIL : 0);
2249         implied_dirs_are_missing = relative_paths && !implied_dirs && protocol_version < 30;
2250
2251         if (DEBUG_GTE(GENR, 1))
2252                 rprintf(FINFO, "generator starting pid=%d\n", (int)getpid());
2253
2254         if (delete_before && !solo_file && cur_flist->used > 0)
2255                 do_delete_pass();
2256         if (delete_during == 2) {
2257                 deldelay_size = BIGPATHBUFLEN * 4;
2258                 deldelay_buf = new_array(char, deldelay_size);
2259         }
2260         info_levels[INFO_FLIST] = info_levels[INFO_PROGRESS] = 0;
2261
2262         if (append_mode > 0 || whole_file < 0)
2263                 whole_file = 0;
2264         if (DEBUG_GTE(FLIST, 1)) {
2265                 rprintf(FINFO, "delta-transmission %s\n",
2266                         whole_file
2267                         ? "disabled for local transfer or --whole-file"
2268                         : "enabled");
2269         }
2270
2271         dflt_perms = (ACCESSPERMS & ~orig_umask);
2272
2273         do {
2274 #ifdef SUPPORT_HARD_LINKS
2275                 if (preserve_hard_links && inc_recurse) {
2276                         while (!flist_eof && file_total < MIN_FILECNT_LOOKAHEAD/2)
2277                                 wait_for_receiver();
2278                 }
2279 #endif
2280
2281                 if (inc_recurse && cur_flist->parent_ndx >= 0) {
2282                         struct file_struct *fp = dir_flist->files[cur_flist->parent_ndx];
2283                         if (solo_file)
2284                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2285                         else
2286                                 f_name(fp, fbuf);
2287                         ndx = cur_flist->ndx_start - 1;
2288                         recv_generator(fbuf, fp, ndx, itemizing, code, f_out);
2289                         if (delete_during && dry_run < 2 && !list_only
2290                          && !(fp->flags & FLAG_MISSING_DIR)) {
2291                                 if (fp->flags & FLAG_CONTENT_DIR) {
2292                                         dev_t dirdev;
2293                                         if (one_file_system) {
2294                                                 uint32 *devp = F_DIR_DEV_P(fp);
2295                                                 dirdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
2296                                         } else
2297                                                 dirdev = MAKEDEV(0, 0);
2298                                         delete_in_dir(fbuf, fp, &dirdev);
2299                                 } else
2300                                         change_local_filter_dir(fbuf, strlen(fbuf), F_DEPTH(fp));
2301                         }
2302                 }
2303                 for (i = cur_flist->low; i <= cur_flist->high; i++) {
2304                         struct file_struct *file = cur_flist->sorted[i];
2305
2306                         if (!F_IS_ACTIVE(file))
2307                                 continue;
2308
2309                         if (unsort_ndx)
2310                                 ndx = F_NDX(file);
2311                         else
2312                                 ndx = i + cur_flist->ndx_start;
2313
2314                         if (solo_file)
2315                                 strlcpy(fbuf, solo_file, sizeof fbuf);
2316                         else
2317                                 f_name(file, fbuf);
2318                         recv_generator(fbuf, file, ndx, itemizing, code, f_out);
2319
2320                         check_for_finished_files(itemizing, code, 0);
2321
2322                         if (i + cur_flist->ndx_start >= next_loopchk) {
2323                                 if (allowed_lull)
2324                                         maybe_send_keepalive(time(NULL), MSK_ALLOW_FLUSH);
2325                                 else
2326                                         maybe_flush_socket(0);
2327                                 next_loopchk += loopchk_limit;
2328                         }
2329                 }
2330
2331                 if (!inc_recurse) {
2332                         write_ndx(f_out, NDX_DONE);
2333                         break;
2334                 }
2335
2336                 while (1) {
2337                         check_for_finished_files(itemizing, code, 1);
2338                         if (cur_flist->next || flist_eof)
2339                                 break;
2340                         wait_for_receiver();
2341                 }
2342         } while ((cur_flist = cur_flist->next) != NULL);
2343
2344         if (delete_during)
2345                 delete_in_dir(NULL, NULL, &dev_zero);
2346         phase++;
2347         if (DEBUG_GTE(GENR, 1))
2348                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2349
2350         while (1) {
2351                 check_for_finished_files(itemizing, code, 1);
2352                 if (msgdone_cnt)
2353                         break;
2354                 wait_for_receiver();
2355         }
2356
2357         phase++;
2358         if (DEBUG_GTE(GENR, 1))
2359                 rprintf(FINFO, "generate_files phase=%d\n", phase);
2360
2361         write_ndx(f_out, NDX_DONE);
2362
2363         /* Reduce round-trip lag-time for a useless delay-updates phase. */
2364         if (protocol_version >= 29 && EARLY_DELAY_DONE_MSG())
2365                 write_ndx(f_out, NDX_DONE);
2366
2367         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG()) {
2368                 if ((INFO_GTE(STATS, 2) && (delete_mode || force_delete)) || read_batch)
2369                         write_del_stats(f_out);
2370                 if (EARLY_DELAY_DONE_MSG()) /* Can't send this before delay */
2371                         write_ndx(f_out, NDX_DONE);
2372         }
2373
2374         /* Read MSG_DONE for the redo phase (and any prior messages). */
2375         while (1) {
2376                 check_for_finished_files(itemizing, code, 0);
2377                 if (msgdone_cnt > 1)
2378                         break;
2379                 wait_for_receiver();
2380         }
2381
2382         if (protocol_version >= 29) {
2383                 phase++;
2384                 if (DEBUG_GTE(GENR, 1))
2385                         rprintf(FINFO, "generate_files phase=%d\n", phase);
2386                 if (!EARLY_DELAY_DONE_MSG()) {
2387                         write_ndx(f_out, NDX_DONE);
2388                         if (protocol_version >= 31 && EARLY_DELETE_DONE_MSG())
2389                                 write_ndx(f_out, NDX_DONE);
2390                 }
2391                 /* Read MSG_DONE for delay-updates phase & prior messages. */
2392                 while (msgdone_cnt == 2)
2393                         wait_for_receiver();
2394         }
2395
2396         info_levels[INFO_FLIST] = save_info_flist;
2397         info_levels[INFO_PROGRESS] = save_info_progress;
2398
2399         if (delete_during == 2)
2400                 do_delayed_deletions(fbuf);
2401         if (delete_after && !solo_file && file_total > 0)
2402                 do_delete_pass();
2403
2404         if (max_delete >= 0 && skipped_deletes) {
2405                 rprintf(FWARNING,
2406                         "Deletions stopped due to --max-delete limit (%d skipped)\n",
2407                         skipped_deletes);
2408                 io_error |= IOERR_DEL_LIMIT;
2409         }
2410
2411         if (protocol_version >= 31) {
2412                 if (!EARLY_DELETE_DONE_MSG()) {
2413                         if (INFO_GTE(STATS, 2) || read_batch)
2414                                 write_del_stats(f_out);
2415                         write_ndx(f_out, NDX_DONE);
2416                 }
2417
2418                 /* Read MSG_DONE for late-delete phase & prior messages. */
2419                 while (msgdone_cnt == 3)
2420                         wait_for_receiver();
2421         }
2422
2423         if ((need_retouch_dir_perms || need_retouch_dir_times)
2424          && dir_tweaking && (!inc_recurse || delete_during == 2))
2425                 touch_up_dirs(dir_flist, -1);
2426
2427         if (DEBUG_GTE(GENR, 1))
2428                 rprintf(FINFO, "generate_files finished\n");
2429 }