flist.c

   1 /*
   2  * Generate and receive file lists.
   3  *
   4  * Copyright (C) 1996 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2002-2008 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "ifuncs.h"
  25 #include "rounding.h"
  26 #include "io.h"
  27
  28 extern int verbose;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int recurse;
  41 extern int use_qsort;
  42 extern int xfer_dirs;
  43 extern int filesfrom_fd;
  44 extern int one_file_system;
  45 extern int copy_dirlinks;
  46 extern int keep_dirlinks;
  47 extern int preserve_uid;
  48 extern int preserve_gid;
  49 extern int preserve_acls;
  50 extern int preserve_xattrs;
  51 extern int preserve_links;
  52 extern int preserve_hard_links;
  53 extern int preserve_devices;
  54 extern int preserve_specials;
  55 extern int uid_ndx;
  56 extern int gid_ndx;
  57 extern int eol_nulls;
  58 extern int relative_paths;
  59 extern int implied_dirs;
  60 extern int file_extra_cnt;
  61 extern int ignore_perishable;
  62 extern int non_perishable_cnt;
  63 extern int prune_empty_dirs;
  64 extern int copy_links;
  65 extern int copy_unsafe_links;
  66 extern int protocol_version;
  67 extern int sanitize_paths;
  68 extern int munge_symlinks;
  69 extern int need_unsorted_flist;
  70 extern int sender_symlink_iconv;
  71 extern int unsort_ndx;
  72 extern struct stats stats;
  73 extern char *filesfrom_host;
  74
  75 extern char curr_dir[MAXPATHLEN];
  76
  77 extern struct chmod_mode_struct *chmod_modes;
  78
  79 extern struct filter_list_struct filter_list;
  80 extern struct filter_list_struct daemon_filter_list;
  81
  82 #ifdef ICONV_OPTION
  83 extern int filesfrom_convert;
  84 extern iconv_t ic_send, ic_recv;
  85 #endif
  86
  87 #define PTR_SIZE (sizeof (struct file_struct *))
  88
  89 int io_error;
  90 int checksum_len;
  91 dev_t filesystem_dev; /* used to implement -x */
  92
  93 struct file_list *cur_flist, *first_flist, *dir_flist;
  94 int send_dir_ndx = -1, send_dir_depth = -1;
  95 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  96 int file_total = 0; /* total of all active items over all file-lists */
  97 int flist_eof = 0; /* all the file-lists are now known */
  98
  99 #define NORMAL_NAME 0
 100 #define SLASH_ENDING_NAME 1
 101 #define DOTDIR_NAME 2
 102
 103 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 104  * internally, even if this platform does not allow files to have 64-bit inums.
 105  * The only exception is if we're on a platform with no 64-bit type at all.
 106  *
 107  * Because we use read_longint() to get these off the wire, if you transfer
 108  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 109  * machine with no 64-bit types then you will get an overflow error.
 110  *
 111  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 112  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 113  * be truncated.  But it's a kind of silly thing to do anyhow. */
 114
 115 /* The tmp_* vars are used as a cache area by make_file() to store data
 116  * that the sender doesn't need to remember in its file list.  The data
 117  * will survive just long enough to be used by send_file_entry(). */
 118 static dev_t tmp_rdev;
 119 #ifdef SUPPORT_HARD_LINKS
 120 static int64 tmp_dev, tmp_ino;
 121 #endif
 122 static char tmp_sum[MAX_DIGEST_LEN];
 123
 124 static char empty_sum[MAX_DIGEST_LEN];
 125 static int flist_count_offset; /* for --delete --progress */
 126 static int dir_count = 0;
 127
 128 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 129 static void output_flist(struct file_list *flist);
 130
 131 void init_flist(void)
 132 {
 133         if (verbose > 4) {
 134                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 135                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 136         }
 137         checksum_len = protocol_version < 21 ? 2
 138                      : protocol_version < 30 ? MD4_DIGEST_LEN
 139                      : MD5_DIGEST_LEN;
 140 }
 141
 142 static int show_filelist_p(void)
 143 {
 144         return verbose && xfer_dirs && !am_server && !inc_recurse;
 145 }
 146
 147 static void start_filelist_progress(char *kind)
 148 {
 149         rprintf(FCLIENT, "%s ... ", kind);
 150         if (verbose > 1 || do_progress)
 151                 rprintf(FCLIENT, "\n");
 152         rflush(FINFO);
 153 }
 154
 155 static void emit_filelist_progress(int count)
 156 {
 157         rprintf(FCLIENT, " %d files...\r", count);
 158 }
 159
 160 static void maybe_emit_filelist_progress(int count)
 161 {
 162         if (do_progress && show_filelist_p() && (count % 100) == 0)
 163                 emit_filelist_progress(count);
 164 }
 165
 166 static void finish_filelist_progress(const struct file_list *flist)
 167 {
 168         if (do_progress) {
 169                 /* This overwrites the progress line */
 170                 rprintf(FINFO, "%d file%sto consider\n",
 171                         flist->used, flist->used == 1 ? " " : "s ");
 172         } else
 173                 rprintf(FINFO, "done\n");
 174 }
 175
 176 void show_flist_stats(void)
 177 {
 178         /* Nothing yet */
 179 }
 180
 181 /* Stat either a symlink or its referent, depending on the settings of
 182  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 183  *
 184  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 185  * MAXPATHLEN chars) will be set to the symlink's target string.
 186  *
 187  * The stat structure pointed to by stp will contain information about the
 188  * link or the referent as appropriate, if they exist. */
 189 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 190 {
 191 #ifdef SUPPORT_LINKS
 192         if (link_stat(path, stp, copy_dirlinks) < 0)
 193                 return -1;
 194         if (S_ISLNK(stp->st_mode)) {
 195                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 196                 if (llen < 0)
 197                         return -1;
 198                 linkbuf[llen] = '\0';
 199                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 200                         if (verbose > 1) {
 201                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 202                                         path, linkbuf);
 203                         }
 204                         return x_stat(path, stp, NULL);
 205                 }
 206                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 207                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 208                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 209                                 llen - SYMLINK_PREFIX_LEN + 1);
 210                 }
 211         }
 212         return 0;
 213 #else
 214         return x_stat(path, stp, NULL);
 215 #endif
 216 }
 217
 218 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 219 {
 220 #ifdef SUPPORT_LINKS
 221         if (copy_links)
 222                 return x_stat(path, stp, NULL);
 223         if (x_lstat(path, stp, NULL) < 0)
 224                 return -1;
 225         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 226                 STRUCT_STAT st;
 227                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 228                         *stp = st;
 229         }
 230         return 0;
 231 #else
 232         return x_stat(path, stp, NULL);
 233 #endif
 234 }
 235
 236 static inline int is_daemon_excluded(const char *fname, int is_dir)
 237 {
 238         if (daemon_filter_list.head
 239          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 240                 errno = ENOENT;
 241                 return 1;
 242         }
 243         return 0;
 244 }
 245
 246 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 247 {
 248         if (daemon_filter_list.head) {
 249                 char *slash = path;
 250
 251                 while ((slash = strchr(slash+1, '/')) != NULL) {
 252                         int ret;
 253                         *slash = '\0';
 254                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 255                         *slash = '/';
 256                         if (ret < 0) {
 257                                 errno = ENOENT;
 258                                 return 1;
 259                         }
 260                 }
 261
 262                 if (!ignore_filename
 263                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 264                         errno = ENOENT;
 265                         return 1;
 266                 }
 267         }
 268
 269         return 0;
 270 }
 271
 272 /* This function is used to check if a file should be included/excluded
 273  * from the list of files based on its name and type etc.  The value of
 274  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 275 static int is_excluded(const char *fname, int is_dir, int filter_level)
 276 {
 277 #if 0 /* This currently never happens, so avoid a useless compare. */
 278         if (filter_level == NO_FILTERS)
 279                 return 0;
 280 #endif
 281         if (is_daemon_excluded(fname, is_dir))
 282                 return 1;
 283         if (filter_level != ALL_FILTERS)
 284                 return 0;
 285         if (filter_list.head
 286             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 287                 return 1;
 288         return 0;
 289 }
 290
 291 static void send_directory(int f, struct file_list *flist,
 292                            char *fbuf, int len, int flags);
 293
 294 static const char *pathname, *orig_dir;
 295 static int pathname_len;
 296
 297 /* Make sure flist can hold at least flist->used + extra entries. */
 298 static void flist_expand(struct file_list *flist, int extra)
 299 {
 300         struct file_struct **new_ptr;
 301
 302         if (flist->used + extra <= flist->malloced)
 303                 return;
 304
 305         if (flist->malloced < FLIST_START)
 306                 flist->malloced = FLIST_START;
 307         else if (flist->malloced >= FLIST_LINEAR)
 308                 flist->malloced += FLIST_LINEAR;
 309         else
 310                 flist->malloced *= 2;
 311
 312         /* In case count jumped or we are starting the list
 313          * with a known size just set it. */
 314         if (flist->malloced < flist->used + extra)
 315                 flist->malloced = flist->used + extra;
 316
 317         new_ptr = realloc_array(flist->files, struct file_struct *,
 318                                 flist->malloced);
 319
 320         if (verbose >= 2 && flist->malloced != FLIST_START) {
 321                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 322                     who_am_i(),
 323                     (double)sizeof flist->files[0] * flist->malloced,
 324                     (new_ptr == flist->files) ? " not" : "");
 325         }
 326
 327         flist->files = new_ptr;
 328
 329         if (!flist->files)
 330                 out_of_memory("flist_expand");
 331 }
 332
 333 static void flist_done_allocating(struct file_list *flist)
 334 {
 335         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 336         if (flist->pool_boundary == ptr)
 337                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 338         else
 339                 flist->pool_boundary = ptr;
 340 }
 341
 342 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 343  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 344  * with dir == NULL taken to be the starting directory, and dirlen < 0
 345  * indicating that strdup(dir) should be called and then the -dirlen length
 346  * value checked to ensure that it is not daemon-excluded. */
 347 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 348 {
 349         if (dirlen < 0) {
 350                 char *cpy = strdup(dir);
 351                 if (*cpy != '/')
 352                         change_dir(orig_dir, CD_SKIP_CHDIR);
 353                 if (path_is_daemon_excluded(cpy, 0))
 354                         goto chdir_error;
 355                 dir = cpy;
 356                 dirlen = -dirlen;
 357         } else {
 358                 if (file) {
 359                         if (pathname == F_PATHNAME(file))
 360                                 return 1;
 361                         dir = F_PATHNAME(file);
 362                         if (dir)
 363                                 dirlen = strlen(dir);
 364                 } else if (pathname == dir)
 365                         return 1;
 366                 if (dir && *dir != '/')
 367                         change_dir(orig_dir, CD_SKIP_CHDIR);
 368         }
 369
 370         pathname = dir;
 371         pathname_len = dirlen;
 372
 373         if (!dir)
 374                 dir = orig_dir;
 375
 376         if (!change_dir(dir, CD_NORMAL)) {
 377           chdir_error:
 378                 io_error |= IOERR_GENERAL;
 379                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
 380                 if (dir != orig_dir)
 381                         change_dir(orig_dir, CD_NORMAL);
 382                 pathname = NULL;
 383                 pathname_len = 0;
 384                 return 0;
 385         }
 386
 387         return 1;
 388 }
 389
 390 static void send_file_entry(int f, const char *fname, struct file_struct *file,
 391 #ifdef SUPPORT_LINKS
 392                             const char *symlink_name, int symlink_len,
 393 #endif
 394                             int ndx, int first_ndx)
 395 {
 396         static time_t modtime;
 397         static mode_t mode;
 398 #ifdef SUPPORT_HARD_LINKS
 399         static int64 dev;
 400 #endif
 401         static dev_t rdev;
 402         static uint32 rdev_major;
 403         static uid_t uid;
 404         static gid_t gid;
 405         static const char *user_name, *group_name;
 406         static char lastname[MAXPATHLEN];
 407         int first_hlink_ndx = -1;
 408         int l1, l2;
 409         int xflags;
 410
 411         /* Initialize starting value of xflags. */
 412         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 413                 dir_count++;
 414                 if (file->flags & FLAG_CONTENT_DIR)
 415                         xflags = file->flags & FLAG_TOP_DIR;
 416                 else if (file->flags & FLAG_IMPLIED_DIR)
 417                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 418                 else
 419                         xflags = XMIT_NO_CONTENT_DIR;
 420         } else
 421                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 422
 423         if (file->mode == mode)
 424                 xflags |= XMIT_SAME_MODE;
 425         else
 426                 mode = file->mode;
 427
 428         if ((preserve_devices && IS_DEVICE(mode))
 429          || (preserve_specials && IS_SPECIAL(mode))) {
 430                 if (protocol_version < 28) {
 431                         if (tmp_rdev == rdev)
 432                                 xflags |= XMIT_SAME_RDEV_pre28;
 433                         else
 434                                 rdev = tmp_rdev;
 435                 } else {
 436                         rdev = tmp_rdev;
 437                         if ((uint32)major(rdev) == rdev_major)
 438                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 439                         else
 440                                 rdev_major = major(rdev);
 441                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 442                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 443                 }
 444         } else if (protocol_version < 28)
 445                 rdev = MAKEDEV(0, 0);
 446         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 447                 xflags |= XMIT_SAME_UID;
 448         else {
 449                 uid = F_OWNER(file);
 450                 if (!numeric_ids) {
 451                         user_name = add_uid(uid);
 452                         if (inc_recurse && user_name)
 453                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 454                 }
 455         }
 456         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 457                 xflags |= XMIT_SAME_GID;
 458         else {
 459                 gid = F_GROUP(file);
 460                 if (!numeric_ids) {
 461                         group_name = add_gid(gid);
 462                         if (inc_recurse && group_name)
 463                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 464                 }
 465         }
 466         if (file->modtime == modtime)
 467                 xflags |= XMIT_SAME_TIME;
 468         else
 469                 modtime = file->modtime;
 470
 471 #ifdef SUPPORT_HARD_LINKS
 472         if (tmp_dev != 0) {
 473                 if (protocol_version >= 30) {
 474                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 475                         first_hlink_ndx = (int32)(long)np->data - 1;
 476                         if (first_hlink_ndx < 0) {
 477                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 478                                 xflags |= XMIT_HLINK_FIRST;
 479                         }
 480                 } else {
 481                         if (tmp_dev == dev) {
 482                                 if (protocol_version >= 28)
 483                                         xflags |= XMIT_SAME_DEV_pre30;
 484                         } else
 485                                 dev = tmp_dev;
 486                 }
 487                 xflags |= XMIT_HLINKED;
 488         }
 489 #endif
 490
 491         for (l1 = 0;
 492             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 493             l1++) {}
 494         l2 = strlen(fname+l1);
 495
 496         if (l1 > 0)
 497                 xflags |= XMIT_SAME_NAME;
 498         if (l2 > 255)
 499                 xflags |= XMIT_LONG_NAME;
 500
 501         /* We must make sure we don't send a zero flag byte or the
 502          * other end will terminate the flist transfer.  Note that
 503          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 504          * it's harmless way to add a bit to the first flag byte. */
 505         if (protocol_version >= 28) {
 506                 if (!xflags && !S_ISDIR(mode))
 507                         xflags |= XMIT_TOP_DIR;
 508                 if ((xflags & 0xFF00) || !xflags) {
 509                         xflags |= XMIT_EXTENDED_FLAGS;
 510                         write_shortint(f, xflags);
 511                 } else
 512                         write_byte(f, xflags);
 513         } else {
 514                 if (!(xflags & 0xFF))
 515                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 516                 write_byte(f, xflags);
 517         }
 518         if (xflags & XMIT_SAME_NAME)
 519                 write_byte(f, l1);
 520         if (xflags & XMIT_LONG_NAME)
 521                 write_varint30(f, l2);
 522         else
 523                 write_byte(f, l2);
 524         write_buf(f, fname + l1, l2);
 525
 526         if (first_hlink_ndx >= 0) {
 527                 write_varint(f, first_hlink_ndx);
 528                 if (first_hlink_ndx >= first_ndx)
 529                         goto the_end;
 530         }
 531
 532         write_varlong30(f, F_LENGTH(file), 3);
 533         if (!(xflags & XMIT_SAME_TIME)) {
 534                 if (protocol_version >= 30)
 535                         write_varlong(f, modtime, 4);
 536                 else
 537                         write_int(f, modtime);
 538         }
 539         if (!(xflags & XMIT_SAME_MODE))
 540                 write_int(f, to_wire_mode(mode));
 541         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 542                 if (protocol_version < 30)
 543                         write_int(f, uid);
 544                 else {
 545                         write_varint(f, uid);
 546                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 547                                 int len = strlen(user_name);
 548                                 write_byte(f, len);
 549                                 write_buf(f, user_name, len);
 550                         }
 551                 }
 552         }
 553         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 554                 if (protocol_version < 30)
 555                         write_int(f, gid);
 556                 else {
 557                         write_varint(f, gid);
 558                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 559                                 int len = strlen(group_name);
 560                                 write_byte(f, len);
 561                                 write_buf(f, group_name, len);
 562                         }
 563                 }
 564         }
 565         if ((preserve_devices && IS_DEVICE(mode))
 566          || (preserve_specials && IS_SPECIAL(mode))) {
 567                 if (protocol_version < 28) {
 568                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 569                                 write_int(f, (int)rdev);
 570                 } else {
 571                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 572                                 write_varint30(f, major(rdev));
 573                         if (protocol_version >= 30)
 574                                 write_varint(f, minor(rdev));
 575                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 576                                 write_byte(f, minor(rdev));
 577                         else
 578                                 write_int(f, minor(rdev));
 579                 }
 580         }
 581
 582 #ifdef SUPPORT_LINKS
 583         if (symlink_len) {
 584                 write_varint30(f, symlink_len);
 585                 write_buf(f, symlink_name, symlink_len);
 586         }
 587 #endif
 588
 589 #ifdef SUPPORT_HARD_LINKS
 590         if (tmp_dev != 0 && protocol_version < 30) {
 591                 if (protocol_version < 26) {
 592                         /* 32-bit dev_t and ino_t */
 593                         write_int(f, (int32)dev);
 594                         write_int(f, (int32)tmp_ino);
 595                 } else {
 596                         /* 64-bit dev_t and ino_t */
 597                         if (!(xflags & XMIT_SAME_DEV_pre30))
 598                                 write_longint(f, dev);
 599                         write_longint(f, tmp_ino);
 600                 }
 601         }
 602 #endif
 603
 604         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 605                 const char *sum;
 606                 if (S_ISREG(mode))
 607                         sum = tmp_sum;
 608                 else {
 609                         /* Prior to 28, we sent a useless set of nulls. */
 610                         sum = empty_sum;
 611                 }
 612                 write_buf(f, sum, checksum_len);
 613         }
 614
 615   the_end:
 616         strlcpy(lastname, fname, MAXPATHLEN);
 617
 618         if (S_ISREG(mode) || S_ISLNK(mode))
 619                 stats.total_size += F_LENGTH(file);
 620 }
 621
 622 static struct file_struct *recv_file_entry(struct file_list *flist,
 623                                            int xflags, int f)
 624 {
 625         static int64 modtime;
 626         static mode_t mode;
 627 #ifdef SUPPORT_HARD_LINKS
 628         static int64 dev;
 629 #endif
 630         static dev_t rdev;
 631         static uint32 rdev_major;
 632         static uid_t uid;
 633         static gid_t gid;
 634         static uint16 gid_flags;
 635         static char lastname[MAXPATHLEN], *lastdir;
 636         static int lastdir_depth, lastdir_len = -1;
 637         static unsigned int del_hier_name_len = 0;
 638         static int in_del_hier = 0;
 639         char thisname[MAXPATHLEN];
 640         unsigned int l1 = 0, l2 = 0;
 641         int alloc_len, basename_len, linkname_len;
 642         int extra_len = file_extra_cnt * EXTRA_LEN;
 643         int first_hlink_ndx = -1;
 644         int64 file_length;
 645         const char *basename;
 646         struct file_struct *file;
 647         alloc_pool_t *pool;
 648         char *bp;
 649
 650         if (xflags & XMIT_SAME_NAME)
 651                 l1 = read_byte(f);
 652
 653         if (xflags & XMIT_LONG_NAME)
 654                 l2 = read_varint30(f);
 655         else
 656                 l2 = read_byte(f);
 657
 658         if (l2 >= MAXPATHLEN - l1) {
 659                 rprintf(FERROR,
 660                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 661                         xflags, l1, l2, lastname, who_am_i());
 662                 overflow_exit("recv_file_entry");
 663         }
 664
 665         strlcpy(thisname, lastname, l1 + 1);
 666         read_sbuf(f, &thisname[l1], l2);
 667         thisname[l1 + l2] = 0;
 668
 669         /* Abuse basename_len for a moment... */
 670         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 671
 672 #ifdef ICONV_OPTION
 673         if (ic_recv != (iconv_t)-1) {
 674                 xbuf outbuf, inbuf;
 675
 676                 INIT_CONST_XBUF(outbuf, thisname);
 677                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 678
 679                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 680                         io_error |= IOERR_GENERAL;
 681                         rprintf(FERROR_UTF8,
 682                             "[%s] cannot convert filename: %s (%s)\n",
 683                             who_am_i(), lastname, strerror(errno));
 684                         outbuf.len = 0;
 685                 }
 686                 thisname[outbuf.len] = '\0';
 687         }
 688 #endif
 689
 690         if (*thisname)
 691                 clean_fname(thisname, 0);
 692
 693         if (sanitize_paths)
 694                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 695
 696         if ((basename = strrchr(thisname, '/')) != NULL) {
 697                 int len = basename++ - thisname;
 698                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 699                         lastdir = new_array(char, len + 1);
 700                         memcpy(lastdir, thisname, len);
 701                         lastdir[len] = '\0';
 702                         lastdir_len = len;
 703                         lastdir_depth = count_dir_elements(lastdir);
 704                 }
 705         } else
 706                 basename = thisname;
 707         basename_len = strlen(basename) + 1; /* count the '\0' */
 708
 709 #ifdef SUPPORT_HARD_LINKS
 710         if (protocol_version >= 30
 711          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 712                 first_hlink_ndx = read_varint(f);
 713                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 714                         rprintf(FERROR,
 715                                 "hard-link reference out of range: %d (%d)\n",
 716                                 first_hlink_ndx, flist->ndx_start + flist->used);
 717                         exit_cleanup(RERR_PROTOCOL);
 718                 }
 719                 if (first_hlink_ndx >= flist->ndx_start) {
 720                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 721                         file_length = F_LENGTH(first);
 722                         modtime = first->modtime;
 723                         mode = first->mode;
 724                         if (preserve_uid)
 725                                 uid = F_OWNER(first);
 726                         if (preserve_gid)
 727                                 gid = F_GROUP(first);
 728                         if ((preserve_devices && IS_DEVICE(mode))
 729                          || (preserve_specials && IS_SPECIAL(mode))) {
 730                                 uint32 *devp = F_RDEV_P(first);
 731                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 732                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 733                         }
 734                         if (preserve_links && S_ISLNK(mode))
 735                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 736                         else
 737                                 linkname_len = 0;
 738                         goto create_object;
 739                 }
 740         }
 741 #endif
 742
 743         file_length = read_varlong30(f, 3);
 744         if (!(xflags & XMIT_SAME_TIME)) {
 745                 if (protocol_version >= 30) {
 746                         modtime = read_varlong(f, 4);
 747 #if SIZEOF_TIME_T < SIZEOF_INT64
 748                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 749                                 rprintf(FERROR_XFER,
 750                                     "Time value of %s truncated on receiver.\n",
 751                                     lastname);
 752                         }
 753 #endif
 754                 } else
 755                         modtime = read_int(f);
 756         }
 757         if (!(xflags & XMIT_SAME_MODE))
 758                 mode = from_wire_mode(read_int(f));
 759
 760         if (chmod_modes && !S_ISLNK(mode))
 761                 mode = tweak_mode(mode, chmod_modes);
 762
 763         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 764                 if (protocol_version < 30)
 765                         uid = (uid_t)read_int(f);
 766                 else {
 767                         uid = (uid_t)read_varint(f);
 768                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 769                                 uid = recv_user_name(f, uid);
 770                         else if (inc_recurse && am_root && !numeric_ids)
 771                                 uid = match_uid(uid);
 772                 }
 773         }
 774         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 775                 if (protocol_version < 30)
 776                         gid = (gid_t)read_int(f);
 777                 else {
 778                         gid = (gid_t)read_varint(f);
 779                         gid_flags = 0;
 780                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 781                                 gid = recv_group_name(f, gid, &gid_flags);
 782                         else if (inc_recurse && (!am_root || !numeric_ids))
 783                                 gid = match_gid(gid, &gid_flags);
 784                 }
 785         }
 786
 787         if ((preserve_devices && IS_DEVICE(mode))
 788          || (preserve_specials && IS_SPECIAL(mode))) {
 789                 if (protocol_version < 28) {
 790                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 791                                 rdev = (dev_t)read_int(f);
 792                 } else {
 793                         uint32 rdev_minor;
 794                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 795                                 rdev_major = read_varint30(f);
 796                         if (protocol_version >= 30)
 797                                 rdev_minor = read_varint(f);
 798                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 799                                 rdev_minor = read_byte(f);
 800                         else
 801                                 rdev_minor = read_int(f);
 802                         rdev = MAKEDEV(rdev_major, rdev_minor);
 803                 }
 804                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 805                 file_length = 0;
 806         } else if (protocol_version < 28)
 807                 rdev = MAKEDEV(0, 0);
 808
 809 #ifdef SUPPORT_LINKS
 810         if (preserve_links && S_ISLNK(mode)) {
 811                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 812                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 813                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 814                                 linkname_len - 1);
 815                         overflow_exit("recv_file_entry");
 816                 }
 817 #ifdef ICONV_OPTION
 818                 /* We don't know how much extra room we need to convert
 819                  * the as-yet-unread symlink data, so let's hope that a
 820                  * double-size buffer is plenty. */
 821                 if (sender_symlink_iconv)
 822                         linkname_len *= 2;
 823 #endif
 824                 if (munge_symlinks)
 825                         linkname_len += SYMLINK_PREFIX_LEN;
 826         }
 827         else
 828 #endif
 829                 linkname_len = 0;
 830
 831 #ifdef SUPPORT_HARD_LINKS
 832   create_object:
 833         if (preserve_hard_links) {
 834                 if (protocol_version < 28 && S_ISREG(mode))
 835                         xflags |= XMIT_HLINKED;
 836                 if (xflags & XMIT_HLINKED)
 837                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 838         }
 839 #endif
 840
 841 #ifdef SUPPORT_ACLS
 842         /* Directories need an extra int32 for the default ACL. */
 843         if (preserve_acls && S_ISDIR(mode))
 844                 extra_len += EXTRA_LEN;
 845 #endif
 846
 847         if (always_checksum && S_ISREG(mode))
 848                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 849
 850 #if SIZEOF_INT64 >= 8
 851         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 852                 extra_len += EXTRA_LEN;
 853 #endif
 854         if (file_length < 0) {
 855                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 856                 exit_cleanup(RERR_UNSUPPORTED);
 857         }
 858
 859         if (inc_recurse && S_ISDIR(mode)) {
 860                 if (one_file_system) {
 861                         /* Room to save the dir's device for -x */
 862                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 863                 }
 864                 pool = dir_flist->file_pool;
 865         } else
 866                 pool = flist->file_pool;
 867
 868 #if EXTRA_ROUNDING > 0
 869         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 870                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 871 #endif
 872
 873         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 874                   + linkname_len;
 875         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 876
 877         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 878         bp += extra_len;
 879         file = (struct file_struct *)bp;
 880         bp += FILE_STRUCT_LEN;
 881
 882         memcpy(bp, basename, basename_len);
 883
 884 #ifdef SUPPORT_HARD_LINKS
 885         if (xflags & XMIT_HLINKED)
 886                 file->flags |= FLAG_HLINKED;
 887 #endif
 888         file->modtime = (time_t)modtime;
 889         file->len32 = (uint32)file_length;
 890 #if SIZEOF_INT64 >= 8
 891         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 892 #if SIZEOF_CAPITAL_OFF_T < 8
 893                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 894                 exit_cleanup(RERR_UNSUPPORTED);
 895 #else
 896                 file->flags |= FLAG_LENGTH64;
 897                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 898 #endif
 899         }
 900 #endif
 901         file->mode = mode;
 902         if (preserve_uid)
 903                 F_OWNER(file) = uid;
 904         if (preserve_gid) {
 905                 F_GROUP(file) = gid;
 906                 file->flags |= gid_flags;
 907         }
 908         if (unsort_ndx)
 909                 F_NDX(file) = flist->used + flist->ndx_start;
 910
 911         if (basename != thisname) {
 912                 file->dirname = lastdir;
 913                 F_DEPTH(file) = lastdir_depth + 1;
 914         } else
 915                 F_DEPTH(file) = 1;
 916
 917         if (S_ISDIR(mode)) {
 918                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 919                         F_DEPTH(file)--;
 920                 if (protocol_version >= 30) {
 921                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 922                                 if (xflags & XMIT_TOP_DIR)
 923                                         file->flags |= FLAG_TOP_DIR;
 924                                 file->flags |= FLAG_CONTENT_DIR;
 925                         } else if (xflags & XMIT_TOP_DIR)
 926                                 file->flags |= FLAG_IMPLIED_DIR;
 927                 } else if (xflags & XMIT_TOP_DIR) {
 928                         in_del_hier = recurse;
 929                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 930                         if (relative_paths && del_hier_name_len > 2
 931                             && lastname[del_hier_name_len-1] == '.'
 932                             && lastname[del_hier_name_len-2] == '/')
 933                                 del_hier_name_len -= 2;
 934                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 935                 } else if (in_del_hier) {
 936                         if (!relative_paths || !del_hier_name_len
 937                          || (l1 >= del_hier_name_len
 938                           && lastname[del_hier_name_len] == '/'))
 939                                 file->flags |= FLAG_CONTENT_DIR;
 940                         else
 941                                 in_del_hier = 0;
 942                 }
 943         }
 944
 945         if ((preserve_devices && IS_DEVICE(mode))
 946          || (preserve_specials && IS_SPECIAL(mode))) {
 947                 uint32 *devp = F_RDEV_P(file);
 948                 DEV_MAJOR(devp) = major(rdev);
 949                 DEV_MINOR(devp) = minor(rdev);
 950         }
 951
 952 #ifdef SUPPORT_LINKS
 953         if (linkname_len) {
 954                 bp += basename_len;
 955                 if (first_hlink_ndx >= flist->ndx_start) {
 956                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 957                         memcpy(bp, F_SYMLINK(first), linkname_len);
 958                 } else {
 959                         if (munge_symlinks) {
 960                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 961                                 bp += SYMLINK_PREFIX_LEN;
 962                                 linkname_len -= SYMLINK_PREFIX_LEN;
 963                         }
 964 #ifdef ICONV_OPTION
 965                         if (sender_symlink_iconv) {
 966                                 xbuf outbuf, inbuf;
 967
 968                                 alloc_len = linkname_len;
 969                                 linkname_len /= 2;
 970
 971                                 /* Read the symlink data into the end of our double-sized
 972                                  * buffer and then convert it into the right spot. */
 973                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
 974                                           linkname_len - 1, (size_t)-1);
 975                                 read_sbuf(f, inbuf.buf, inbuf.len);
 976                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
 977
 978                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 979                                         io_error |= IOERR_GENERAL;
 980                                         rprintf(FERROR_XFER,
 981                                             "[%s] cannot convert symlink data for: %s (%s)\n",
 982                                             who_am_i(), full_fname(thisname), strerror(errno));
 983                                         bp = (char*)file->basename;
 984                                         *bp++ = '\0';
 985                                         outbuf.len = 0;
 986                                 }
 987                                 bp[outbuf.len] = '\0';
 988                         } else
 989 #endif
 990                                 read_sbuf(f, bp, linkname_len - 1);
 991                         if (sanitize_paths && !munge_symlinks && *bp)
 992                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
 993                 }
 994         }
 995 #endif
 996
 997 #ifdef SUPPORT_HARD_LINKS
 998         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 999                 if (protocol_version >= 30) {
1000                         if (xflags & XMIT_HLINK_FIRST) {
1001                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1002                         } else
1003                                 F_HL_GNUM(file) = first_hlink_ndx;
1004                 } else {
1005                         static int32 cnt = 0;
1006                         struct ht_int64_node *np;
1007                         int64 ino;
1008                         int32 ndx;
1009                         if (protocol_version < 26) {
1010                                 dev = read_int(f);
1011                                 ino = read_int(f);
1012                         } else {
1013                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1014                                         dev = read_longint(f);
1015                                 ino = read_longint(f);
1016                         }
1017                         np = idev_find(dev, ino);
1018                         ndx = (int32)(long)np->data - 1;
1019                         if (ndx < 0) {
1020                                 ndx = cnt++;
1021                                 np->data = (void*)(long)cnt;
1022                         }
1023                         F_HL_GNUM(file) = ndx;
1024                 }
1025         }
1026 #endif
1027
1028         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1029                 if (S_ISREG(mode))
1030                         bp = F_SUM(file);
1031                 else {
1032                         /* Prior to 28, we get a useless set of nulls. */
1033                         bp = tmp_sum;
1034                 }
1035                 if (first_hlink_ndx >= flist->ndx_start) {
1036                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1037                         memcpy(bp, F_SUM(first), checksum_len);
1038                 } else
1039                         read_buf(f, bp, checksum_len);
1040         }
1041
1042 #ifdef SUPPORT_ACLS
1043         if (preserve_acls && !S_ISLNK(mode))
1044                 receive_acl(file, f);
1045 #endif
1046 #ifdef SUPPORT_XATTRS
1047         if (preserve_xattrs)
1048                 receive_xattr(file, f );
1049 #endif
1050
1051         if (S_ISREG(mode) || S_ISLNK(mode))
1052                 stats.total_size += file_length;
1053
1054         return file;
1055 }
1056
1057 /* Create a file_struct for a named file by reading its stat() information
1058  * and performing extensive checks against global options.
1059  *
1060  * Returns a pointer to the new file struct, or NULL if there was an error
1061  * or this file should be excluded.
1062  *
1063  * Note: Any error (here or in send_file_name) that results in the omission of
1064  * an existent source file from the file list should set
1065  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1066  * destination if --delete is on. */
1067 struct file_struct *make_file(const char *fname, struct file_list *flist,
1068                               STRUCT_STAT *stp, int flags, int filter_level)
1069 {
1070         static char *lastdir;
1071         static int lastdir_len = -1;
1072         struct file_struct *file;
1073         char thisname[MAXPATHLEN];
1074         char linkname[MAXPATHLEN];
1075         int alloc_len, basename_len, linkname_len;
1076         int extra_len = file_extra_cnt * EXTRA_LEN;
1077         const char *basename;
1078         alloc_pool_t *pool;
1079         STRUCT_STAT st;
1080         char *bp;
1081
1082         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1083                 io_error |= IOERR_GENERAL;
1084                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1085                 return NULL;
1086         }
1087         clean_fname(thisname, 0);
1088         if (sanitize_paths)
1089                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1090
1091         if (stp && S_ISDIR(stp->st_mode)) {
1092                 st = *stp; /* Needed for "symlink/." with --relative. */
1093                 *linkname = '\0'; /* make IBM code checker happy */
1094         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1095                 int save_errno = errno;
1096                 /* See if file is excluded before reporting an error. */
1097                 if (filter_level != NO_FILTERS
1098                  && (is_excluded(thisname, 0, filter_level)
1099                   || is_excluded(thisname, 1, filter_level))) {
1100                         if (ignore_perishable && save_errno != ENOENT)
1101                                 non_perishable_cnt++;
1102                         return NULL;
1103                 }
1104                 if (save_errno == ENOENT) {
1105 #ifdef SUPPORT_LINKS
1106                         /* When our options tell us to follow a symlink that
1107                          * points nowhere, tell the user about the symlink
1108                          * instead of giving a "vanished" message.  We only
1109                          * dereference a symlink if one of the --copy*links
1110                          * options was specified, so there's no need for the
1111                          * extra lstat() if one of these options isn't on. */
1112                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1113                          && x_lstat(thisname, &st, NULL) == 0
1114                          && S_ISLNK(st.st_mode)) {
1115                                 io_error |= IOERR_GENERAL;
1116                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1117                                         full_fname(thisname));
1118                         } else
1119 #endif
1120                         {
1121                                 enum logcode c = am_daemon && protocol_version < 28
1122                                                ? FERROR : FWARNING;
1123                                 io_error |= IOERR_VANISHED;
1124                                 rprintf(c, "file has vanished: %s\n",
1125                                         full_fname(thisname));
1126                         }
1127                 } else {
1128                         io_error |= IOERR_GENERAL;
1129                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1130                                 full_fname(thisname));
1131                 }
1132                 return NULL;
1133         }
1134
1135         if (filter_level == NO_FILTERS)
1136                 goto skip_filters;
1137
1138         if (S_ISDIR(st.st_mode)) {
1139                 if (!xfer_dirs) {
1140                         rprintf(FINFO, "skipping directory %s\n", thisname);
1141                         return NULL;
1142                 }
1143                 /* -x only affects dirs because we need to avoid recursing
1144                  * into a mount-point directory, not to avoid copying a
1145                  * symlinked file if -L (or similar) was specified. */
1146                 if (one_file_system && st.st_dev != filesystem_dev
1147                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1148                         if (one_file_system > 1) {
1149                                 if (verbose > 1) {
1150                                         rprintf(FINFO,
1151                                             "[%s] skipping mount-point dir %s\n",
1152                                             who_am_i(), thisname);
1153                                 }
1154                                 return NULL;
1155                         }
1156                         flags |= FLAG_MOUNT_DIR;
1157                         flags &= ~FLAG_CONTENT_DIR;
1158                 }
1159         } else
1160                 flags &= ~FLAG_CONTENT_DIR;
1161
1162         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1163                 if (ignore_perishable)
1164                         non_perishable_cnt++;
1165                 return NULL;
1166         }
1167
1168         if (lp_ignore_nonreadable(module_id)) {
1169 #ifdef SUPPORT_LINKS
1170                 if (!S_ISLNK(st.st_mode))
1171 #endif
1172                         if (access(thisname, R_OK) != 0)
1173                                 return NULL;
1174         }
1175
1176   skip_filters:
1177
1178         /* Only divert a directory in the main transfer. */
1179         if (flist) {
1180                 if (flist->prev && S_ISDIR(st.st_mode)
1181                  && flags & FLAG_DIVERT_DIRS) {
1182                         /* Room for parent/sibling/next-child info. */
1183                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1184                         if (relative_paths)
1185                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1186                         pool = dir_flist->file_pool;
1187                 } else
1188                         pool = flist->file_pool;
1189         } else {
1190 #ifdef SUPPORT_ACLS
1191                 /* Directories need an extra int32 for the default ACL. */
1192                 if (preserve_acls && S_ISDIR(st.st_mode))
1193                         extra_len += EXTRA_LEN;
1194 #endif
1195                 pool = NULL;
1196         }
1197
1198         if (verbose > 2) {
1199                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1200                         who_am_i(), thisname, filter_level);
1201         }
1202
1203         if ((basename = strrchr(thisname, '/')) != NULL) {
1204                 int len = basename++ - thisname;
1205                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1206                         lastdir = new_array(char, len + 1);
1207                         memcpy(lastdir, thisname, len);
1208                         lastdir[len] = '\0';
1209                         lastdir_len = len;
1210                 }
1211         } else
1212                 basename = thisname;
1213         basename_len = strlen(basename) + 1; /* count the '\0' */
1214
1215 #ifdef SUPPORT_LINKS
1216         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1217 #else
1218         linkname_len = 0;
1219 #endif
1220
1221 #if SIZEOF_CAPITAL_OFF_T >= 8
1222         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1223                 extra_len += EXTRA_LEN;
1224 #endif
1225
1226 #if EXTRA_ROUNDING > 0
1227         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1228                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1229 #endif
1230
1231         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1232                   + linkname_len;
1233         if (pool)
1234                 bp = pool_alloc(pool, alloc_len, "make_file");
1235         else {
1236                 if (!(bp = new_array(char, alloc_len)))
1237                         out_of_memory("make_file");
1238         }
1239
1240         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1241         bp += extra_len;
1242         file = (struct file_struct *)bp;
1243         bp += FILE_STRUCT_LEN;
1244
1245         memcpy(bp, basename, basename_len);
1246
1247 #ifdef SUPPORT_HARD_LINKS
1248         if (preserve_hard_links && flist && flist->prev) {
1249                 if (protocol_version >= 28
1250                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1251                  : S_ISREG(st.st_mode)) {
1252                         tmp_dev = (int64)st.st_dev + 1;
1253                         tmp_ino = (int64)st.st_ino;
1254                 } else
1255                         tmp_dev = 0;
1256         }
1257 #endif
1258
1259 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1260         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1261                 tmp_rdev = st.st_rdev;
1262                 st.st_size = 0;
1263         }
1264 #endif
1265
1266         file->flags = flags;
1267         file->modtime = st.st_mtime;
1268         file->len32 = (uint32)st.st_size;
1269 #if SIZEOF_CAPITAL_OFF_T >= 8
1270         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1271                 file->flags |= FLAG_LENGTH64;
1272                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1273         }
1274 #endif
1275         file->mode = st.st_mode;
1276         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1277                 F_OWNER(file) = st.st_uid;
1278         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1279                 F_GROUP(file) = st.st_gid;
1280
1281         if (basename != thisname)
1282                 file->dirname = lastdir;
1283
1284 #ifdef SUPPORT_LINKS
1285         if (linkname_len)
1286                 memcpy(bp + basename_len, linkname, linkname_len);
1287 #endif
1288
1289         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1290                 file_checksum(thisname, tmp_sum, st.st_size);
1291
1292         if (am_sender)
1293                 F_PATHNAME(file) = pathname;
1294         else if (!pool)
1295                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1296
1297         if (basename_len == 0+1) {
1298                 if (!pool)
1299                         unmake_file(file);
1300                 return NULL;
1301         }
1302
1303         if (unsort_ndx)
1304                 F_NDX(file) = dir_count;
1305
1306         return file;
1307 }
1308
1309 /* Only called for temporary file_struct entries created by make_file(). */
1310 void unmake_file(struct file_struct *file)
1311 {
1312         free(REQ_EXTRA(file, F_DEPTH(file)));
1313 }
1314
1315 static struct file_struct *send_file_name(int f, struct file_list *flist,
1316                                           const char *fname, STRUCT_STAT *stp,
1317                                           int flags, int filter_level)
1318 {
1319         struct file_struct *file;
1320
1321         file = make_file(fname, flist, stp, flags, filter_level);
1322         if (!file)
1323                 return NULL;
1324
1325         if (chmod_modes && !S_ISLNK(file->mode))
1326                 file->mode = tweak_mode(file->mode, chmod_modes);
1327
1328         if (f >= 0) {
1329                 char fbuf[MAXPATHLEN];
1330 #ifdef SUPPORT_LINKS
1331                 const char *symlink_name;
1332                 int symlink_len;
1333 #ifdef ICONV_OPTION
1334                 char symlink_buf[MAXPATHLEN];
1335 #endif
1336 #endif
1337 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1338                 stat_x sx;
1339 #endif
1340
1341 #ifdef SUPPORT_LINKS
1342                 if (preserve_links && S_ISLNK(file->mode)) {
1343                         symlink_name = F_SYMLINK(file);
1344                         symlink_len = strlen(symlink_name);
1345                 } else {
1346                         symlink_name = NULL;
1347                         symlink_len = 0;
1348                 }
1349 #endif
1350
1351 #ifdef ICONV_OPTION
1352                 if (ic_send != (iconv_t)-1) {
1353                         xbuf outbuf, inbuf;
1354
1355                         INIT_CONST_XBUF(outbuf, fbuf);
1356
1357                         if (file->dirname) {
1358                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1359                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1360                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1361                                         goto convert_error;
1362                                 outbuf.size += 2;
1363                                 fbuf[outbuf.len++] = '/';
1364                         }
1365
1366                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1367                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1368                           convert_error:
1369                                 io_error |= IOERR_GENERAL;
1370                                 rprintf(FERROR_XFER,
1371                                     "[%s] cannot convert filename: %s (%s)\n",
1372                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1373                                 return NULL;
1374                         }
1375                         fbuf[outbuf.len] = '\0';
1376
1377 #ifdef SUPPORT_LINKS
1378                         if (symlink_len && sender_symlink_iconv) {
1379                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1380                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1381                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1382                                         io_error |= IOERR_GENERAL;
1383                                         f_name(file, fbuf);
1384                                         rprintf(FERROR_XFER,
1385                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1386                                             who_am_i(), full_fname(fbuf), strerror(errno));
1387                                         return NULL;
1388                                 }
1389                                 symlink_buf[outbuf.len] = '\0';
1390
1391                                 symlink_name = symlink_buf;
1392                                 symlink_len = outbuf.len;
1393                         }
1394 #endif
1395                 } else
1396 #endif
1397                         f_name(file, fbuf);
1398
1399 #ifdef SUPPORT_ACLS
1400                 if (preserve_acls && !S_ISLNK(file->mode)) {
1401                         sx.st.st_mode = file->mode;
1402                         sx.acc_acl = sx.def_acl = NULL;
1403                         if (get_acl(fname, &sx) < 0) {
1404                                 io_error |= IOERR_GENERAL;
1405                                 return NULL;
1406                         }
1407                 }
1408 #endif
1409 #ifdef SUPPORT_XATTRS
1410                 if (preserve_xattrs) {
1411                         sx.xattr = NULL;
1412                         if (get_xattr(fname, &sx) < 0) {
1413                                 io_error |= IOERR_GENERAL;
1414                                 return NULL;
1415                         }
1416                 }
1417 #endif
1418
1419                 send_file_entry(f, fbuf, file,
1420 #ifdef SUPPORT_LINKS
1421                                 symlink_name, symlink_len,
1422 #endif
1423                                 flist->used, flist->ndx_start);
1424
1425 #ifdef SUPPORT_ACLS
1426                 if (preserve_acls && !S_ISLNK(file->mode)) {
1427                         send_acl(&sx, f);
1428                         free_acl(&sx);
1429                 }
1430 #endif
1431 #ifdef SUPPORT_XATTRS
1432                 if (preserve_xattrs) {
1433                         F_XATTR(file) = send_xattr(&sx, f);
1434                         free_xattr(&sx);
1435                 }
1436 #endif
1437         }
1438
1439         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1440
1441         flist_expand(flist, 1);
1442         flist->files[flist->used++] = file;
1443
1444         return file;
1445 }
1446
1447 static void send_if_directory(int f, struct file_list *flist,
1448                               struct file_struct *file,
1449                               char *fbuf, unsigned int ol,
1450                               int flags)
1451 {
1452         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1453
1454         if (S_ISDIR(file->mode)
1455             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1456                 void *save_filters;
1457                 unsigned int len = strlen(fbuf);
1458                 if (len > 1 && fbuf[len-1] == '/')
1459                         fbuf[--len] = '\0';
1460                 if (len >= MAXPATHLEN - 1) {
1461                         io_error |= IOERR_GENERAL;
1462                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1463                                 full_fname(fbuf));
1464                         return;
1465                 }
1466                 save_filters = push_local_filters(fbuf, len);
1467                 send_directory(f, flist, fbuf, len, flags);
1468                 pop_local_filters(save_filters);
1469                 fbuf[ol] = '\0';
1470                 if (is_dot_dir)
1471                         fbuf[ol-1] = '.';
1472         }
1473 }
1474
1475 static int file_compare(const void *file1, const void *file2)
1476 {
1477         return f_name_cmp(*(struct file_struct **)file1,
1478                           *(struct file_struct **)file2);
1479 }
1480
1481 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1482  * version, but I (Wayne) changed the merge code to do less copying and
1483  * to require only half the amount of temporary memory. */
1484 static void fsort_tmp(struct file_struct **fp, size_t num,
1485                       struct file_struct **tmp)
1486 {
1487         struct file_struct **f1, **f2, **t;
1488         size_t n1, n2;
1489
1490         n1 = num / 2;
1491         n2 = num - n1;
1492         f1 = fp;
1493         f2 = fp + n1;
1494
1495         if (n1 > 1)
1496                 fsort_tmp(f1, n1, tmp);
1497         if (n2 > 1)
1498                 fsort_tmp(f2, n2, tmp);
1499
1500         while (f_name_cmp(*f1, *f2) <= 0) {
1501                 if (!--n1)
1502                         return;
1503                 f1++;
1504         }
1505
1506         t = tmp;
1507         memcpy(t, f1, n1 * PTR_SIZE);
1508
1509         *f1++ = *f2++, n2--;
1510
1511         while (n1 > 0 && n2 > 0) {
1512                 if (f_name_cmp(*t, *f2) <= 0)
1513                         *f1++ = *t++, n1--;
1514                 else
1515                         *f1++ = *f2++, n2--;
1516         }
1517
1518         if (n1 > 0)
1519                 memcpy(f1, t, n1 * PTR_SIZE);
1520 }
1521
1522 /* This file-struct sorting routine makes sure that any identical names in
1523  * the file list stay in the same order as they were in the original list.
1524  * This is particularly vital in inc_recurse mode where we expect a sort
1525  * on the flist to match the exact order of a sort on the dir_flist. */
1526 static void fsort(struct file_struct **fp, size_t num)
1527 {
1528         if (num <= 1)
1529                 return;
1530
1531         if (use_qsort)
1532                 qsort(fp, num, PTR_SIZE, file_compare);
1533         else {
1534                 struct file_struct **tmp = new_array(struct file_struct *,
1535                                                      (num+1) / 2);
1536                 fsort_tmp(fp, num, tmp);
1537                 free(tmp);
1538         }
1539 }
1540
1541 /* We take an entire set of sibling dirs from the sorted flist and link them
1542  * into the tree, setting the appropriate parent/child/sibling pointers. */
1543 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1544                              int dir_cnt)
1545 {
1546         int i;
1547         int32 *dp = NULL;
1548         int32 *parent_dp = parent_ndx < 0 ? NULL
1549                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1550
1551         flist_expand(dir_flist, dir_cnt);
1552         dir_flist->sorted = dir_flist->files;
1553
1554         for (i = 0; dir_cnt; i++) {
1555                 struct file_struct *file = from_flist->sorted[i];
1556
1557                 if (!S_ISDIR(file->mode))
1558                         continue;
1559
1560                 dir_flist->files[dir_flist->used++] = file;
1561                 dir_cnt--;
1562
1563                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1564                         continue;
1565
1566                 if (dp)
1567                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1568                 else if (parent_dp)
1569                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1570                 else
1571                         send_dir_ndx = dir_flist->used - 1;
1572
1573                 dp = F_DIR_NODE_P(file);
1574                 DIR_PARENT(dp) = parent_ndx;
1575                 DIR_FIRST_CHILD(dp) = -1;
1576         }
1577         if (dp)
1578                 DIR_NEXT_SIBLING(dp) = -1;
1579 }
1580
1581 /* This function is normally called by the sender, but the receiving side also
1582  * calls it from get_dirlist() with f set to -1 so that we just construct the
1583  * file list in memory without sending it over the wire.  Also, get_dirlist()
1584  * might call this with f set to -2, which also indicates that local filter
1585  * rules should be ignored. */
1586 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1587                            int flags)
1588 {
1589         struct dirent *di;
1590         unsigned remainder;
1591         char *p;
1592         DIR *d;
1593         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1594         int start = flist->used;
1595         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1596
1597         assert(flist != NULL);
1598
1599         if (!(d = opendir(fbuf))) {
1600                 io_error |= IOERR_GENERAL;
1601                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1602                 return;
1603         }
1604
1605         p = fbuf + len;
1606         if (len != 1 || *fbuf != '/')
1607                 *p++ = '/';
1608         *p = '\0';
1609         remainder = MAXPATHLEN - (p - fbuf);
1610
1611         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1612                 char *dname = d_name(di);
1613                 if (dname[0] == '.' && (dname[1] == '\0'
1614                     || (dname[1] == '.' && dname[2] == '\0')))
1615                         continue;
1616                 if (strlcpy(p, dname, remainder) >= remainder) {
1617                         io_error |= IOERR_GENERAL;
1618                         rprintf(FERROR_XFER,
1619                                 "cannot send long-named file %s\n",
1620                                 full_fname(fbuf));
1621                         continue;
1622                 }
1623                 if (dname[0] == '\0') {
1624                         io_error |= IOERR_GENERAL;
1625                         rprintf(FERROR_XFER,
1626                                 "cannot send file with empty name in %s\n",
1627                                 full_fname(fbuf));
1628                         continue;
1629                 }
1630
1631                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1632         }
1633
1634         fbuf[len] = '\0';
1635
1636         if (errno) {
1637                 io_error |= IOERR_GENERAL;
1638                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1639         }
1640
1641         closedir(d);
1642
1643         if (f >= 0 && recurse && !divert_dirs) {
1644                 int i, end = flist->used - 1;
1645                 /* send_if_directory() bumps flist->used, so use "end". */
1646                 for (i = start; i <= end; i++)
1647                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1648         }
1649 }
1650
1651 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1652                               char *start, char *limit, int flags, char name_type)
1653 {
1654         static char lastpath[MAXPATHLEN] = "";
1655         static int lastpath_len = 0;
1656         static struct file_struct *lastpath_struct = NULL;
1657         struct file_struct *file;
1658         item_list *relname_list;
1659         relnamecache **rnpp;
1660         int len, need_new_dir, depth = 0;
1661         struct filter_list_struct save_filter_list = filter_list;
1662
1663         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1664         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1665
1666         if (inc_recurse) {
1667                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1668                  && lastpath_len == limit - fname
1669                  && strncmp(lastpath, fname, lastpath_len) == 0)
1670                         need_new_dir = 0;
1671                 else
1672                         need_new_dir = 1;
1673         } else {
1674                 char *tp = fname, *lp = lastpath;
1675                 /* Skip any initial directories in our path that we
1676                  * have in common with lastpath. */
1677                 assert(start == fname);
1678                 for ( ; ; tp++, lp++) {
1679                         if (tp == limit) {
1680                                 if (*lp == '/' || *lp == '\0')
1681                                         goto done;
1682                                 break;
1683                         }
1684                         if (*lp != *tp)
1685                                 break;
1686                         if (*tp == '/') {
1687                                 start = tp;
1688                                 depth++;
1689                         }
1690                 }
1691                 need_new_dir = 1;
1692         }
1693
1694         if (need_new_dir) {
1695                 int save_copy_links = copy_links;
1696                 int save_xfer_dirs = xfer_dirs;
1697                 char *slash;
1698
1699                 copy_links = xfer_dirs = 1;
1700
1701                 *limit = '\0';
1702
1703                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1704                         *slash = '\0';
1705                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1706                         depth++;
1707                         if (!inc_recurse && file && S_ISDIR(file->mode))
1708                                 change_local_filter_dir(fname, strlen(fname), depth);
1709                         *slash = '/';
1710                 }
1711
1712                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1713                 if (inc_recurse) {
1714                         if (file && !S_ISDIR(file->mode))
1715                                 file = NULL;
1716                         lastpath_struct = file;
1717                 } else if (file && S_ISDIR(file->mode))
1718                         change_local_filter_dir(fname, strlen(fname), ++depth);
1719
1720                 strlcpy(lastpath, fname, sizeof lastpath);
1721                 lastpath_len = limit - fname;
1722
1723                 *limit = '/';
1724
1725                 copy_links = save_copy_links;
1726                 xfer_dirs = save_xfer_dirs;
1727
1728                 if (!inc_recurse)
1729                         goto done;
1730         }
1731
1732         if (!lastpath_struct)
1733                 goto done; /* dir must have vanished */
1734
1735         len = strlen(limit+1);
1736         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1737         if (!relname_list) {
1738                 if (!(relname_list = new0(item_list)))
1739                         out_of_memory("send_implied_dirs");
1740                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1741         }
1742         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1743         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1744                 out_of_memory("send_implied_dirs");
1745         (*rnpp)->name_type = name_type;
1746         strlcpy((*rnpp)->fname, limit+1, len + 1);
1747
1748 done:
1749         filter_list = save_filter_list;
1750 }
1751
1752 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1753 {
1754         char fbuf[MAXPATHLEN];
1755         item_list *relname_list;
1756         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1757         size_t j;
1758
1759         f_name(file, fbuf);
1760         dlen = strlen(fbuf);
1761
1762         if (!change_pathname(file, NULL, 0))
1763                 exit_cleanup(RERR_FILESELECT);
1764
1765         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1766
1767         if (file->flags & FLAG_CONTENT_DIR) {
1768                 if (one_file_system) {
1769                         STRUCT_STAT st;
1770                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1771                                 io_error |= IOERR_GENERAL;
1772                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1773                                         full_fname(fbuf));
1774                                 return;
1775                         }
1776                         filesystem_dev = st.st_dev;
1777                 }
1778                 send_directory(f, flist, fbuf, dlen, flags);
1779         }
1780
1781         if (!relative_paths)
1782                 return;
1783
1784         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1785         if (!relname_list)
1786                 return;
1787
1788         for (j = 0; j < relname_list->count; j++) {
1789                 char *slash;
1790                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1791                 char name_type = rnp->name_type;
1792
1793                 fbuf[dlen] = '/';
1794                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1795                 free(rnp);
1796                 if (len >= (int)sizeof fbuf)
1797                         continue; /* Impossible... */
1798
1799                 slash = strchr(fbuf+dlen+1, '/');
1800                 if (slash) {
1801                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1802                         continue;
1803                 }
1804
1805                 if (name_type != NORMAL_NAME) {
1806                         STRUCT_STAT st;
1807                         if (link_stat(fbuf, &st, 1) != 0) {
1808                                 io_error |= IOERR_GENERAL;
1809                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1810                                         full_fname(fbuf));
1811                                 continue;
1812                         }
1813                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1814                 } else
1815                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1816         }
1817
1818         free(relname_list);
1819 }
1820
1821 void send_extra_file_list(int f, int at_least)
1822 {
1823         struct file_list *flist;
1824         int64 start_write;
1825         uint16 prev_flags;
1826         int old_cnt, save_io_error = io_error;
1827
1828         if (flist_eof)
1829                 return;
1830
1831         /* Keep sending data until we have the requested number of
1832          * files in the upcoming file-lists. */
1833         old_cnt = cur_flist->used;
1834         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1835                 old_cnt += flist->used;
1836         while (file_total - old_cnt < at_least) {
1837                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1838                 int dir_ndx, dstart = dir_count;
1839                 const char *pathname = F_PATHNAME(file);
1840                 int32 *dp;
1841
1842                 flist = flist_new(0, "send_extra_file_list");
1843                 start_write = stats.total_written;
1844
1845                 if (unsort_ndx)
1846                         dir_ndx = F_NDX(file);
1847                 else
1848                         dir_ndx = send_dir_ndx;
1849                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1850                 flist->parent_ndx = dir_ndx;
1851
1852                 send1extra(f, file, flist);
1853                 prev_flags = file->flags;
1854                 dp = F_DIR_NODE_P(file);
1855
1856                 /* If there are any duplicate directory names that follow, we
1857                  * send all the dirs together in one file-list.  The dir_flist
1858                  * tree links all the child subdirs onto the last dup dir. */
1859                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1860                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1861                         send_dir_ndx = dir_ndx;
1862                         file = dir_flist->sorted[dir_ndx];
1863                         /* Try to avoid some duplicate scanning of identical dirs. */
1864                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1865                                 file->flags &= ~FLAG_CONTENT_DIR;
1866                         send1extra(f, file, flist);
1867                         prev_flags = file->flags;
1868                         dp = F_DIR_NODE_P(file);
1869                 }
1870
1871                 write_byte(f, 0);
1872
1873                 if (need_unsorted_flist) {
1874                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1875                                 out_of_memory("send_extra_file_list");
1876                         memcpy(flist->sorted, flist->files,
1877                                flist->used * sizeof (struct file_struct*));
1878                 } else
1879                         flist->sorted = flist->files;
1880
1881                 flist_sort_and_clean(flist, 0);
1882
1883                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1884                 flist_done_allocating(flist);
1885
1886                 file_total += flist->used;
1887                 stats.flist_size += stats.total_written - start_write;
1888                 stats.num_files += flist->used;
1889                 if (verbose > 3)
1890                         output_flist(flist);
1891
1892                 if (DIR_FIRST_CHILD(dp) >= 0) {
1893                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1894                         send_dir_depth++;
1895                 } else {
1896                         while (DIR_NEXT_SIBLING(dp) < 0) {
1897                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1898                                         write_ndx(f, NDX_FLIST_EOF);
1899                                         flist_eof = 1;
1900                                         change_local_filter_dir(NULL, 0, 0);
1901                                         goto finish;
1902                                 }
1903                                 send_dir_depth--;
1904                                 file = dir_flist->sorted[send_dir_ndx];
1905                                 dp = F_DIR_NODE_P(file);
1906                         }
1907                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1908                 }
1909         }
1910
1911   finish:
1912         if (io_error != save_io_error && !ignore_errors)
1913                 send_msg_int(MSG_IO_ERROR, io_error);
1914 }
1915
1916 struct file_list *send_file_list(int f, int argc, char *argv[])
1917 {
1918         static const char *lastdir;
1919         static int lastdir_len = -1;
1920         int len, dirlen;
1921         STRUCT_STAT st;
1922         char *p, *dir;
1923         struct file_list *flist;
1924         struct timeval start_tv, end_tv;
1925         int64 start_write;
1926         int use_ff_fd = 0;
1927         int disable_buffering;
1928         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1929         int reading_remotely = filesfrom_host != NULL;
1930         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1931 #ifdef ICONV_OPTION
1932                      | (filesfrom_convert ? RL_CONVERT : 0)
1933 #endif
1934                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1935         int implied_dot_dir = 0;
1936
1937         rprintf(FLOG, "building file list\n");
1938         if (show_filelist_p())
1939                 start_filelist_progress("building file list");
1940         else if (inc_recurse && verbose && !am_server)
1941                 rprintf(FCLIENT, "sending incremental file list\n");
1942
1943         start_write = stats.total_written;
1944         gettimeofday(&start_tv, NULL);
1945
1946         if (relative_paths && protocol_version >= 30)
1947                 implied_dirs = 1; /* We send flagged implied dirs */
1948
1949 #ifdef SUPPORT_HARD_LINKS
1950         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1951                 init_hard_links();
1952 #endif
1953
1954         flist = cur_flist = flist_new(0, "send_file_list");
1955         if (inc_recurse) {
1956                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1957                 flags |= FLAG_DIVERT_DIRS;
1958         } else
1959                 dir_flist = cur_flist;
1960
1961         disable_buffering = io_start_buffering_out(f);
1962         if (filesfrom_fd >= 0) {
1963                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
1964                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
1965                                 full_fname(argv[0]));
1966                         exit_cleanup(RERR_FILESELECT);
1967                 }
1968                 use_ff_fd = 1;
1969         }
1970
1971         if (!orig_dir)
1972                 orig_dir = strdup(curr_dir);
1973
1974         while (1) {
1975                 char fbuf[MAXPATHLEN], *fn, name_type;
1976
1977                 if (use_ff_fd) {
1978                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1979                                 break;
1980                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1981                 } else {
1982                         if (argc-- == 0)
1983                                 break;
1984                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1985                         if (sanitize_paths)
1986                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1987                 }
1988
1989                 len = strlen(fbuf);
1990                 if (relative_paths) {
1991                         /* We clean up fbuf below. */
1992                         name_type = NORMAL_NAME;
1993                 } else if (!len || fbuf[len - 1] == '/') {
1994                         if (len == 2 && fbuf[0] == '.') {
1995                                 /* Turn "./" into just "." rather than "./." */
1996                                 fbuf[--len] = '\0';
1997                         } else {
1998                                 if (len + 1 >= MAXPATHLEN)
1999                                         overflow_exit("send_file_list");
2000                                 fbuf[len++] = '.';
2001                                 fbuf[len] = '\0';
2002                         }
2003                         name_type = DOTDIR_NAME;
2004                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2005                     && (len == 2 || fbuf[len-3] == '/')) {
2006                         if (len + 2 >= MAXPATHLEN)
2007                                 overflow_exit("send_file_list");
2008                         fbuf[len++] = '/';
2009                         fbuf[len++] = '.';
2010                         fbuf[len] = '\0';
2011                         name_type = DOTDIR_NAME;
2012                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2013                         name_type = DOTDIR_NAME;
2014                 else
2015                         name_type = NORMAL_NAME;
2016
2017                 dir = NULL;
2018
2019                 if (!relative_paths) {
2020                         p = strrchr(fbuf, '/');
2021                         if (p) {
2022                                 *p = '\0';
2023                                 if (p == fbuf)
2024                                         dir = "/";
2025                                 else
2026                                         dir = fbuf;
2027                                 len -= p - fbuf + 1;
2028                                 fn = p + 1;
2029                         } else
2030                                 fn = fbuf;
2031                 } else {
2032                         if ((p = strstr(fbuf, "/./")) != NULL) {
2033                                 *p = '\0';
2034                                 if (p == fbuf)
2035                                         dir = "/";
2036                                 else {
2037                                         dir = fbuf;
2038                                         clean_fname(dir, 0);
2039                                 }
2040                                 fn = p + 3;
2041                                 while (*fn == '/')
2042                                         fn++;
2043                                 if (!*fn)
2044                                         *--fn = '\0'; /* ensure room for '.' */
2045                         } else
2046                                 fn = fbuf;
2047                         /* A leading ./ can be used in relative mode to affect
2048                          * the dest dir without its name being in the path. */
2049                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2050                                 send_file_name(f, flist, ".", NULL,
2051                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2052                                     ALL_FILTERS);
2053                                 implied_dot_dir = 1;
2054                         }
2055                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2056                                             | CFN_DROP_TRAILING_DOT_DIR);
2057                         if (len == 1) {
2058                                 if (fn[0] == '/') {
2059                                         fn = "/.";
2060                                         len = 2;
2061                                         name_type = DOTDIR_NAME;
2062                                 } else if (fn[0] == '.')
2063                                         name_type = DOTDIR_NAME;
2064                         } else if (fn[len-1] == '/') {
2065                                 fn[--len] = '\0';
2066                                 if (len == 1 && *fn == '.')
2067                                         name_type = DOTDIR_NAME;
2068                                 else
2069                                         name_type = SLASH_ENDING_NAME;
2070                         }
2071                         /* Reject a ".." dir in the active part of the path. */
2072                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2073                                 if ((p[2] == '/' || p[2] == '\0')
2074                                  && (p == fn || p[-1] == '/')) {
2075                                         rprintf(FERROR,
2076                                             "found \"..\" dir in relative path: %s\n",
2077                                             fn);
2078                                         exit_cleanup(RERR_SYNTAX);
2079                                 }
2080                         }
2081                 }
2082
2083                 if (!*fn) {
2084                         len = 1;
2085                         fn = ".";
2086                         name_type = DOTDIR_NAME;
2087                 }
2088
2089                 dirlen = dir ? strlen(dir) : 0;
2090                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2091                         if (!change_pathname(NULL, dir, -dirlen))
2092                                 continue;
2093                         lastdir = pathname;
2094                         lastdir_len = pathname_len;
2095                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2096                         continue;
2097
2098                 if (fn != fbuf)
2099                         memmove(fbuf, fn, len + 1);
2100
2101                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2102                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2103                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2104                         io_error |= IOERR_GENERAL;
2105                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2106                                 full_fname(fbuf));
2107                         continue;
2108                 }
2109
2110                 /* A dot-dir should not be excluded! */
2111                 if (name_type != DOTDIR_NAME
2112                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2113                         continue;
2114
2115                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2116                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2117                         continue;
2118                 }
2119
2120                 if (inc_recurse && relative_paths && *fbuf) {
2121                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2122                                 if (p - fbuf == 1 && *fbuf == '.') {
2123                                         if ((fn = strchr(p+1, '/')) != NULL)
2124                                                 p = fn;
2125                                 } else
2126                                         fn = p;
2127                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2128                                 if (fn == p)
2129                                         continue;
2130                         }
2131                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2132                         /* Send the implied directories at the start of the
2133                          * source spec, so we get their permissions right. */
2134                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2135                 }
2136
2137                 if (one_file_system)
2138                         filesystem_dev = st.st_dev;
2139
2140                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2141                         struct file_struct *file;
2142                         file = send_file_name(f, flist, fbuf, &st,
2143                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2144                                               NO_FILTERS);
2145                         if (!file)
2146                                 continue;
2147                         if (inc_recurse) {
2148                                 if (name_type == DOTDIR_NAME) {
2149                                         if (send_dir_depth < 0) {
2150                                                 send_dir_depth = 0;
2151                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2152                                         }
2153                                         send_directory(f, flist, fbuf, len, flags);
2154                                 }
2155                         } else
2156                                 send_if_directory(f, flist, file, fbuf, len, flags);
2157                 } else
2158                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2159         }
2160
2161         gettimeofday(&end_tv, NULL);
2162         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2163                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2164         if (stats.flist_buildtime == 0)
2165                 stats.flist_buildtime = 1;
2166         start_tv = end_tv;
2167
2168         write_byte(f, 0); /* Indicate end of file list */
2169
2170 #ifdef SUPPORT_HARD_LINKS
2171         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2172                 idev_destroy();
2173 #endif
2174
2175         if (show_filelist_p())
2176                 finish_filelist_progress(flist);
2177
2178         gettimeofday(&end_tv, NULL);
2179         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2180                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2181
2182         /* When converting names, both sides keep an unsorted file-list array
2183          * because the names will differ on the sending and receiving sides
2184          * (both sides will use the unsorted index number for each item). */
2185
2186         /* Sort the list without removing any duplicates.  This allows the
2187          * receiving side to ask for whatever name it kept.  For incremental
2188          * recursion mode, the sender marks duplicate dirs so that it can
2189          * send them together in a single file-list. */
2190         if (need_unsorted_flist) {
2191                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2192                         out_of_memory("send_file_list");
2193                 memcpy(flist->sorted, flist->files,
2194                        flist->used * sizeof (struct file_struct*));
2195         } else
2196                 flist->sorted = flist->files;
2197         flist_sort_and_clean(flist, 0);
2198         file_total += flist->used;
2199
2200         if (numeric_ids <= 0 && !inc_recurse)
2201                 send_id_list(f);
2202
2203         /* send the io_error flag */
2204         if (protocol_version < 30)
2205                 write_int(f, ignore_errors ? 0 : io_error);
2206         else if (io_error && !ignore_errors)
2207                 send_msg_int(MSG_IO_ERROR, io_error);
2208
2209         if (disable_buffering)
2210                 io_end_buffering_out();
2211
2212         stats.flist_size = stats.total_written - start_write;
2213         stats.num_files = flist->used;
2214
2215         if (verbose > 3)
2216                 output_flist(flist);
2217
2218         if (verbose > 2)
2219                 rprintf(FINFO, "send_file_list done\n");
2220
2221         if (inc_recurse) {
2222                 send_dir_depth = 1;
2223                 add_dirs_to_tree(-1, flist, dir_count);
2224                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2225                         flist->parent_ndx = -1;
2226                 flist_done_allocating(flist);
2227                 if (send_dir_ndx < 0) {
2228                         write_ndx(f, NDX_FLIST_EOF);
2229                         flist_eof = 1;
2230                 }
2231                 else if (file_total == 1) {
2232                         /* If we're creating incremental file-lists and there
2233                          * was just 1 item in the first file-list, send 1 more
2234                          * file-list to check if this is a 1-file xfer. */
2235                         send_extra_file_list(f, 1);
2236                 }
2237         }
2238
2239         return flist;
2240 }
2241
2242 struct file_list *recv_file_list(int f)
2243 {
2244         struct file_list *flist;
2245         int dstart, flags;
2246         int64 start_read;
2247
2248         if (!first_flist)
2249                 rprintf(FLOG, "receiving file list\n");
2250         if (show_filelist_p())
2251                 start_filelist_progress("receiving file list");
2252         else if (inc_recurse && verbose && !am_server && !first_flist)
2253                 rprintf(FCLIENT, "receiving incremental file list\n");
2254
2255         start_read = stats.total_read;
2256
2257 #ifdef SUPPORT_HARD_LINKS
2258         if (preserve_hard_links && !first_flist)
2259                 init_hard_links();
2260 #endif
2261
2262         flist = flist_new(0, "recv_file_list");
2263
2264         if (inc_recurse) {
2265                 if (flist->ndx_start == 1)
2266                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2267                 dstart = dir_flist->used;
2268         } else {
2269                 dir_flist = flist;
2270                 dstart = 0;
2271         }
2272
2273         while ((flags = read_byte(f)) != 0) {
2274                 struct file_struct *file;
2275
2276                 flist_expand(flist, 1);
2277
2278                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2279                         flags |= read_byte(f) << 8;
2280                 file = recv_file_entry(flist, flags, f);
2281
2282                 if (inc_recurse && S_ISDIR(file->mode)) {
2283                         flist_expand(dir_flist, 1);
2284                         dir_flist->files[dir_flist->used++] = file;
2285                 }
2286
2287                 flist->files[flist->used++] = file;
2288
2289                 maybe_emit_filelist_progress(flist->used);
2290
2291                 if (verbose > 2) {
2292                         char *name = f_name(file, NULL);
2293                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2294                 }
2295         }
2296         file_total += flist->used;
2297
2298         if (verbose > 2)
2299                 rprintf(FINFO, "received %d names\n", flist->used);
2300
2301         if (show_filelist_p())
2302                 finish_filelist_progress(flist);
2303
2304         if (need_unsorted_flist) {
2305                 /* Create an extra array of index pointers that we can sort for
2306                  * the generator's use (for wading through the files in sorted
2307                  * order and for calling flist_find()).  We keep the "files"
2308                  * list unsorted for our exchange of index numbers with the
2309                  * other side (since their names may not sort the same). */
2310                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2311                         out_of_memory("recv_file_list");
2312                 memcpy(flist->sorted, flist->files,
2313                        flist->used * sizeof (struct file_struct*));
2314                 if (inc_recurse && dir_flist->used > dstart) {
2315                         static int dir_flist_malloced = 0;
2316                         if (dir_flist_malloced < dir_flist->malloced) {
2317                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2318                                                         struct file_struct *,
2319                                                         dir_flist->malloced);
2320                                 dir_flist_malloced = dir_flist->malloced;
2321                         }
2322                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2323                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2324                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2325                 }
2326         } else {
2327                 flist->sorted = flist->files;
2328                 if (inc_recurse && dir_flist->used > dstart) {
2329                         dir_flist->sorted = dir_flist->files;
2330                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2331                 }
2332         }
2333
2334         if (inc_recurse)
2335                 flist_done_allocating(flist);
2336         else if (f >= 0)
2337                 recv_id_list(f, flist);
2338
2339         flist_sort_and_clean(flist, relative_paths);
2340
2341         if (protocol_version < 30) {
2342                 /* Recv the io_error flag */
2343                 if (ignore_errors)
2344                         read_int(f);
2345                 else
2346                         io_error |= read_int(f);
2347         } else if (inc_recurse && flist->ndx_start == 1) {
2348                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2349                         flist->parent_ndx = -1;
2350         }
2351
2352         if (verbose > 3)
2353                 output_flist(flist);
2354
2355         if (verbose > 2)
2356                 rprintf(FINFO, "recv_file_list done\n");
2357
2358         stats.flist_size += stats.total_read - start_read;
2359         stats.num_files += flist->used;
2360
2361         return flist;
2362 }
2363
2364 /* This is only used once by the receiver if the very first file-list
2365  * has exactly one item in it. */
2366 void recv_additional_file_list(int f)
2367 {
2368         struct file_list *flist;
2369         int ndx = read_ndx(f);
2370         if (ndx == NDX_FLIST_EOF) {
2371                 flist_eof = 1;
2372                 change_local_filter_dir(NULL, 0, 0);
2373         } else {
2374                 ndx = NDX_FLIST_OFFSET - ndx;
2375                 if (ndx < 0 || ndx >= dir_flist->used) {
2376                         ndx = NDX_FLIST_OFFSET - ndx;
2377                         rprintf(FERROR,
2378                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2379                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2380                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2381                         exit_cleanup(RERR_PROTOCOL);
2382                 }
2383                 if (verbose > 3) {
2384                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2385                                 who_am_i(), ndx);
2386                 }
2387                 flist = recv_file_list(f);
2388                 flist->parent_ndx = ndx;
2389         }
2390 }
2391
2392 /* Search for an identically-named item in the file list.  Note that the
2393  * items must agree in their directory-ness, or no match is returned. */
2394 int flist_find(struct file_list *flist, struct file_struct *f)
2395 {
2396         int low = flist->low, high = flist->high;
2397         int diff, mid, mid_up;
2398
2399         while (low <= high) {
2400                 mid = (low + high) / 2;
2401                 if (F_IS_ACTIVE(flist->sorted[mid]))
2402                         mid_up = mid;
2403                 else {
2404                         /* Scan for the next non-empty entry using the cached
2405                          * distance values.  If the value isn't fully up-to-
2406                          * date, update it. */
2407                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2408                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2409                                 do {
2410                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2411                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2412                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2413                         }
2414                         if (mid_up > high) {
2415                                 /* If there's nothing left above us, set high to
2416                                  * a non-empty entry below us and continue. */
2417                                 high = mid - (int)flist->sorted[mid]->len32;
2418                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2419                                         do {
2420                                             high -= (int)flist->sorted[high]->len32;
2421                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2422                                         flist->sorted[mid]->len32 = mid - high;
2423                                 }
2424                                 continue;
2425                         }
2426                 }
2427                 diff = f_name_cmp(flist->sorted[mid_up], f);
2428                 if (diff == 0) {
2429                         if (protocol_version < 29
2430                             && S_ISDIR(flist->sorted[mid_up]->mode)
2431                             != S_ISDIR(f->mode))
2432                                 return -1;
2433                         return mid_up;
2434                 }
2435                 if (diff < 0)
2436                         low = mid_up + 1;
2437                 else
2438                         high = mid - 1;
2439         }
2440         return -1;
2441 }
2442
2443 /* Search for an identically-named item in the file list.  Differs from
2444  * flist_find in that an item that agrees with "f" in directory-ness is
2445  * preferred but one that does not is still found. */
2446 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2447 {
2448         mode_t save_mode;
2449         int ndx;
2450
2451         /* First look for an item that agrees in directory-ness. */
2452         ndx = flist_find(flist, f);
2453         if (ndx >= 0)
2454                 return ndx;
2455
2456         /* Temporarily flip f->mode to look for an item of opposite
2457          * directory-ness. */
2458         save_mode = f->mode;
2459         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2460         ndx = flist_find(flist, f);
2461         f->mode = save_mode;
2462         return ndx;
2463 }
2464
2465 /*
2466  * Free up any resources a file_struct has allocated
2467  * and clear the file.
2468  */
2469 void clear_file(struct file_struct *file)
2470 {
2471         /* The +1 zeros out the first char of the basename. */
2472         memset(file, 0, FILE_STRUCT_LEN + 1);
2473         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2474          * entry.  Likewise for len32 in the opposite direction.  We assume
2475          * that we're alone for now since flist_find() will adjust the counts
2476          * it runs into that aren't up-to-date. */
2477         file->len32 = F_DEPTH(file) = 1;
2478 }
2479
2480 /* Allocate a new file list. */
2481 struct file_list *flist_new(int flags, char *msg)
2482 {
2483         struct file_list *flist;
2484
2485         if (!(flist = new0(struct file_list)))
2486                 out_of_memory(msg);
2487
2488         if (flags & FLIST_TEMP) {
2489                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2490                                                 out_of_memory, POOL_INTERN)))
2491                         out_of_memory(msg);
2492         } else {
2493                 /* This is a doubly linked list with prev looping back to
2494                  * the end of the list, but the last next pointer is NULL. */
2495                 if (!first_flist) {
2496                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2497                                                 out_of_memory, POOL_INTERN);
2498                         if (!flist->file_pool)
2499                                 out_of_memory(msg);
2500
2501                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2502
2503                         first_flist = cur_flist = flist->prev = flist;
2504                 } else {
2505                         struct file_list *prev = first_flist->prev;
2506
2507                         flist->file_pool = first_flist->file_pool;
2508
2509                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2510                         flist->flist_num = prev->flist_num + 1;
2511
2512                         flist->prev = prev;
2513                         prev->next = first_flist->prev = flist;
2514                 }
2515                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2516                 flist_cnt++;
2517         }
2518
2519         return flist;
2520 }
2521
2522 /* Free up all elements in a flist. */
2523 void flist_free(struct file_list *flist)
2524 {
2525         if (!flist->prev) {
2526                 /* Was FLIST_TEMP dir-list. */
2527         } else if (flist == flist->prev) {
2528                 first_flist = cur_flist = NULL;
2529                 file_total = 0;
2530                 flist_cnt = 0;
2531         } else {
2532                 if (flist == cur_flist)
2533                         cur_flist = flist->next;
2534                 if (flist == first_flist)
2535                         first_flist = first_flist->next;
2536                 else {
2537                         flist->prev->next = flist->next;
2538                         if (!flist->next)
2539                                 flist->next = first_flist;
2540                 }
2541                 flist->next->prev = flist->prev;
2542                 file_total -= flist->used;
2543                 flist_cnt--;
2544         }
2545
2546         if (!flist->prev || !flist_cnt)
2547                 pool_destroy(flist->file_pool);
2548         else
2549                 pool_free_old(flist->file_pool, flist->pool_boundary);
2550
2551         if (flist->sorted && flist->sorted != flist->files)
2552                 free(flist->sorted);
2553         free(flist->files);
2554         free(flist);
2555 }
2556
2557 /* This routine ensures we don't have any duplicate names in our file list.
2558  * duplicate names can cause corruption because of the pipelining. */
2559 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2560 {
2561         char fbuf[MAXPATHLEN];
2562         int i, prev_i;
2563
2564         if (!flist)
2565                 return;
2566         if (flist->used == 0) {
2567                 flist->high = -1;
2568                 flist->low = 0;
2569                 return;
2570         }
2571
2572         fsort(flist->sorted, flist->used);
2573
2574         if (!am_sender || inc_recurse) {
2575                 for (i = prev_i = 0; i < flist->used; i++) {
2576                         if (F_IS_ACTIVE(flist->sorted[i])) {
2577                                 prev_i = i;
2578                                 break;
2579                         }
2580                 }
2581                 flist->low = prev_i;
2582         } else {
2583                 i = prev_i = flist->used - 1;
2584                 flist->low = 0;
2585         }
2586
2587         while (++i < flist->used) {
2588                 int j;
2589                 struct file_struct *file = flist->sorted[i];
2590
2591                 if (!F_IS_ACTIVE(file))
2592                         continue;
2593                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2594                         j = prev_i;
2595                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2596                         int save_mode = file->mode;
2597                         /* Make sure that this directory doesn't duplicate a
2598                          * non-directory earlier in the list. */
2599                         flist->high = prev_i;
2600                         file->mode = S_IFREG;
2601                         j = flist_find(flist, file);
2602                         file->mode = save_mode;
2603                 } else
2604                         j = -1;
2605                 if (j >= 0) {
2606                         int keep, drop;
2607                         /* If one is a dir and the other is not, we want to
2608                          * keep the dir because it might have contents in the
2609                          * list.  Otherwise keep the first one. */
2610                         if (S_ISDIR(file->mode)) {
2611                                 struct file_struct *fp = flist->sorted[j];
2612                                 if (!S_ISDIR(fp->mode))
2613                                         keep = i, drop = j;
2614                                 else {
2615                                         if (am_sender)
2616                                                 file->flags |= FLAG_DUPLICATE;
2617                                         else { /* Make sure we merge our vital flags. */
2618                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2619                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2620                                         }
2621                                         keep = j, drop = i;
2622                                 }
2623                         } else
2624                                 keep = j, drop = i;
2625
2626                         if (!am_sender) {
2627                                 if (verbose > 1) {
2628                                         rprintf(FINFO,
2629                                             "removing duplicate name %s from file list (%d)\n",
2630                                             f_name(file, fbuf), drop + flist->ndx_start);
2631                                 }
2632                                 clear_file(flist->sorted[drop]);
2633                         }
2634
2635                         if (keep == i) {
2636                                 if (flist->low == drop) {
2637                                         for (j = drop + 1;
2638                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2639                                              j++) {}
2640                                         flist->low = j;
2641                                 }
2642                                 prev_i = i;
2643                         }
2644                 } else
2645                         prev_i = i;
2646         }
2647         flist->high = prev_i;
2648
2649         if (strip_root) {
2650                 /* We need to strip off the leading slashes for relative
2651                  * paths, but this must be done _after_ the sorting phase. */
2652                 for (i = flist->low; i <= flist->high; i++) {
2653                         struct file_struct *file = flist->sorted[i];
2654
2655                         if (!file->dirname)
2656                                 continue;
2657                         while (*file->dirname == '/')
2658                                 file->dirname++;
2659                         if (!*file->dirname)
2660                                 file->dirname = NULL;
2661                 }
2662         }
2663
2664         if (prune_empty_dirs && !am_sender) {
2665                 int j, prev_depth = 0;
2666
2667                 prev_i = 0; /* It's OK that this isn't really true. */
2668
2669                 for (i = flist->low; i <= flist->high; i++) {
2670                         struct file_struct *fp, *file = flist->sorted[i];
2671
2672                         /* This temporarily abuses the F_DEPTH() value for a
2673                          * directory that is in a chain that might get pruned.
2674                          * We restore the old value if it gets a reprieve. */
2675                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2676                                 /* Dump empty dirs when coming back down. */
2677                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2678                                         fp = flist->sorted[prev_i];
2679                                         if (F_DEPTH(fp) >= 0)
2680                                                 break;
2681                                         prev_i = -F_DEPTH(fp)-1;
2682                                         clear_file(fp);
2683                                 }
2684                                 prev_depth = F_DEPTH(file);
2685                                 if (is_excluded(f_name(file, fbuf), 1,
2686                                                        ALL_FILTERS)) {
2687                                         /* Keep dirs through this dir. */
2688                                         for (j = prev_depth-1; ; j--) {
2689                                                 fp = flist->sorted[prev_i];
2690                                                 if (F_DEPTH(fp) >= 0)
2691                                                         break;
2692                                                 prev_i = -F_DEPTH(fp)-1;
2693                                                 F_DEPTH(fp) = j;
2694                                         }
2695                                 } else
2696                                         F_DEPTH(file) = -prev_i-1;
2697                                 prev_i = i;
2698                         } else {
2699                                 /* Keep dirs through this non-dir. */
2700                                 for (j = prev_depth; ; j--) {
2701                                         fp = flist->sorted[prev_i];
2702                                         if (F_DEPTH(fp) >= 0)
2703                                                 break;
2704                                         prev_i = -F_DEPTH(fp)-1;
2705                                         F_DEPTH(fp) = j;
2706                                 }
2707                         }
2708                 }
2709                 /* Dump all remaining empty dirs. */
2710                 while (1) {
2711                         struct file_struct *fp = flist->sorted[prev_i];
2712                         if (F_DEPTH(fp) >= 0)
2713                                 break;
2714                         prev_i = -F_DEPTH(fp)-1;
2715                         clear_file(fp);
2716                 }
2717
2718                 for (i = flist->low; i <= flist->high; i++) {
2719                         if (F_IS_ACTIVE(flist->sorted[i]))
2720                                 break;
2721                 }
2722                 flist->low = i;
2723                 for (i = flist->high; i >= flist->low; i--) {
2724                         if (F_IS_ACTIVE(flist->sorted[i]))
2725                                 break;
2726                 }
2727                 flist->high = i;
2728         }
2729 }
2730
2731 static void output_flist(struct file_list *flist)
2732 {
2733         char uidbuf[16], gidbuf[16], depthbuf[16];
2734         struct file_struct *file;
2735         const char *root, *dir, *slash, *name, *trail;
2736         const char *who = who_am_i();
2737         int i;
2738
2739         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2740                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2741         for (i = 0; i < flist->used; i++) {
2742                 file = flist->files[i];
2743                 if ((am_root || am_sender) && uid_ndx) {
2744                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2745                                  F_OWNER(file));
2746                 } else
2747                         *uidbuf = '\0';
2748                 if (gid_ndx) {
2749                         static char parens[] = "(\0)\0\0\0";
2750                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2751                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2752                                  pp, F_GROUP(file), pp + 2);
2753                 } else
2754                         *gidbuf = '\0';
2755                 if (!am_sender)
2756                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2757                 if (F_IS_ACTIVE(file)) {
2758                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2759                         if ((dir = file->dirname) == NULL)
2760                                 dir = slash = "";
2761                         else
2762                                 slash = "/";
2763                         name = file->basename;
2764                         trail = S_ISDIR(file->mode) ? "/" : "";
2765                 } else
2766                         root = dir = slash = name = trail = "";
2767                 rprintf(FINFO,
2768                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2769                         who, i + flist->ndx_start,
2770                         root, dir, slash, name, trail,
2771                         (int)file->mode, (double)F_LENGTH(file),
2772                         uidbuf, gidbuf, file->flags);
2773         }
2774 }
2775
2776 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2777 enum fnc_type { t_PATH, t_ITEM };
2778
2779 static int found_prefix;
2780
2781 /* Compare the names of two file_struct entities, similar to how strcmp()
2782  * would do if it were operating on the joined strings.
2783  *
2784  * Some differences beginning with protocol_version 29: (1) directory names
2785  * are compared with an assumed trailing slash so that they compare in a
2786  * way that would cause them to sort immediately prior to any content they
2787  * may have; (2) a directory of any name compares after a non-directory of
2788  * any name at the same depth; (3) a directory with name "." compares prior
2789  * to anything else.  These changes mean that a directory and a non-dir
2790  * with the same name will not compare as equal (protocol_version >= 29).
2791  *
2792  * The dirname component can be an empty string, but the basename component
2793  * cannot (and never is in the current codebase).  The basename component
2794  * may be NULL (for a removed item), in which case it is considered to be
2795  * after any existing item. */
2796 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2797 {
2798         int dif;
2799         const uchar *c1, *c2;
2800         enum fnc_state state1, state2;
2801         enum fnc_type type1, type2;
2802         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2803
2804         if (!f1 || !F_IS_ACTIVE(f1)) {
2805                 if (!f2 || !F_IS_ACTIVE(f2))
2806                         return 0;
2807                 return -1;
2808         }
2809         if (!f2 || !F_IS_ACTIVE(f2))
2810                 return 1;
2811
2812         c1 = (uchar*)f1->dirname;
2813         c2 = (uchar*)f2->dirname;
2814         if (c1 == c2)
2815                 c1 = c2 = NULL;
2816         if (!c1) {
2817                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2818                 c1 = (const uchar*)f1->basename;
2819                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2820                         type1 = t_ITEM;
2821                         state1 = s_TRAILING;
2822                         c1 = (uchar*)"";
2823                 } else
2824                         state1 = s_BASE;
2825         } else {
2826                 type1 = t_path;
2827                 state1 = s_DIR;
2828         }
2829         if (!c2) {
2830                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2831                 c2 = (const uchar*)f2->basename;
2832                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2833                         type2 = t_ITEM;
2834                         state2 = s_TRAILING;
2835                         c2 = (uchar*)"";
2836                 } else
2837                         state2 = s_BASE;
2838         } else {
2839                 type2 = t_path;
2840                 state2 = s_DIR;
2841         }
2842
2843         if (type1 != type2)
2844                 return type1 == t_PATH ? 1 : -1;
2845
2846         do {
2847                 if (!*c1) {
2848                         switch (state1) {
2849                         case s_DIR:
2850                                 state1 = s_SLASH;
2851                                 c1 = (uchar*)"/";
2852                                 break;
2853                         case s_SLASH:
2854                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2855                                 c1 = (const uchar*)f1->basename;
2856                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2857                                         type1 = t_ITEM;
2858                                         state1 = s_TRAILING;
2859                                         c1 = (uchar*)"";
2860                                 } else
2861                                         state1 = s_BASE;
2862                                 break;
2863                         case s_BASE:
2864                                 state1 = s_TRAILING;
2865                                 if (type1 == t_PATH) {
2866                                         c1 = (uchar*)"/";
2867                                         break;
2868                                 }
2869                                 /* FALL THROUGH */
2870                         case s_TRAILING:
2871                                 type1 = t_ITEM;
2872                                 break;
2873                         }
2874                         if (*c2 && type1 != type2)
2875                                 return type1 == t_PATH ? 1 : -1;
2876                 }
2877                 if (!*c2) {
2878                         switch (state2) {
2879                         case s_DIR:
2880                                 state2 = s_SLASH;
2881                                 c2 = (uchar*)"/";
2882                                 break;
2883                         case s_SLASH:
2884                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2885                                 c2 = (const uchar*)f2->basename;
2886                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2887                                         type2 = t_ITEM;
2888                                         state2 = s_TRAILING;
2889                                         c2 = (uchar*)"";
2890                                 } else
2891                                         state2 = s_BASE;
2892                                 break;
2893                         case s_BASE:
2894                                 state2 = s_TRAILING;
2895                                 if (type2 == t_PATH) {
2896                                         c2 = (uchar*)"/";
2897                                         break;
2898                                 }
2899                                 /* FALL THROUGH */
2900                         case s_TRAILING:
2901                                 found_prefix = 1;
2902                                 if (!*c1)
2903                                         return 0;
2904                                 type2 = t_ITEM;
2905                                 break;
2906                         }
2907                         if (type1 != type2)
2908                                 return type1 == t_PATH ? 1 : -1;
2909                 }
2910         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2911
2912         return dif;
2913 }
2914
2915 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2916  * not match if f2's basename is not an exact match of a path element in f1.
2917  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2918 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2919 {
2920         found_prefix = 0;
2921         f_name_cmp(f1, f2);
2922         return found_prefix;
2923 }
2924
2925 char *f_name_buf(void)
2926 {
2927         static char names[5][MAXPATHLEN];
2928         static unsigned int n;
2929
2930         n = (n + 1) % (sizeof names / sizeof names[0]);
2931
2932         return names[n];
2933 }
2934
2935 /* Return a copy of the full filename of a flist entry, using the indicated
2936  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2937  * done because we checked the size when creating the file_struct entry.
2938  */
2939 char *f_name(const struct file_struct *f, char *fbuf)
2940 {
2941         if (!f || !F_IS_ACTIVE(f))
2942                 return NULL;
2943
2944         if (!fbuf)
2945                 fbuf = f_name_buf();
2946
2947         if (f->dirname) {
2948                 int len = strlen(f->dirname);
2949                 memcpy(fbuf, f->dirname, len);
2950                 fbuf[len] = '/';
2951                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2952         } else
2953                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2954
2955         return fbuf;
2956 }
2957
2958 /* Do a non-recursive scan of the named directory, possibly ignoring all
2959  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2960  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2961  * buffer (the functions we call will append names onto the end, but the old
2962  * dir value will be restored on exit). */
2963 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2964 {
2965         struct file_list *dirlist;
2966         char dirbuf[MAXPATHLEN];
2967         int save_recurse = recurse;
2968         int save_xfer_dirs = xfer_dirs;
2969         int save_prune_empty_dirs = prune_empty_dirs;
2970
2971         if (dlen < 0) {
2972                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2973                 if (dlen >= MAXPATHLEN)
2974                         return NULL;
2975                 dirname = dirbuf;
2976         }
2977
2978         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2979
2980         recurse = 0;
2981         xfer_dirs = 1;
2982         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2983         xfer_dirs = save_xfer_dirs;
2984         recurse = save_recurse;
2985         if (do_progress)
2986                 flist_count_offset += dirlist->used;
2987
2988         prune_empty_dirs = 0;
2989         dirlist->sorted = dirlist->files;
2990         flist_sort_and_clean(dirlist, 0);
2991         prune_empty_dirs = save_prune_empty_dirs;
2992
2993         if (verbose > 3)
2994                 output_flist(dirlist);
2995
2996         return dirlist;
2997 }