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