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 unsort_ndx;
  71 extern struct stats stats;
  72 extern char *filesfrom_host;
  73
  74 extern char curr_dir[MAXPATHLEN];
  75
  76 extern struct chmod_mode_struct *chmod_modes;
  77
  78 extern struct filter_list_struct filter_list;
  79 extern struct filter_list_struct daemon_filter_list;
  80
  81 #ifdef ICONV_OPTION
  82 extern int filesfrom_convert;
  83 extern iconv_t ic_send, ic_recv;
  84 #endif
  85
  86 #define PTR_SIZE (sizeof (struct file_struct *))
  87
  88 int io_error;
  89 int checksum_len;
  90 dev_t filesystem_dev; /* used to implement -x */
  91
  92 struct file_list *cur_flist, *first_flist, *dir_flist;
  93 int send_dir_ndx = -1, send_dir_depth = -1;
  94 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  95 int file_total = 0; /* total of all active items over all file-lists */
  96 int flist_eof = 0; /* all the file-lists are now known */
  97
  98 #define NORMAL_NAME 0
  99 #define SLASH_ENDING_NAME 1
 100 #define DOTDIR_NAME 2
 101
 102 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 103  * internally, even if this platform does not allow files to have 64-bit inums.
 104  * The only exception is if we're on a platform with no 64-bit type at all.
 105  *
 106  * Because we use read_longint() to get these off the wire, if you transfer
 107  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 108  * machine with no 64-bit types then you will get an overflow error.
 109  *
 110  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 111  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 112  * be truncated.  But it's a kind of silly thing to do anyhow. */
 113
 114 /* The tmp_* vars are used as a cache area by make_file() to store data
 115  * that the sender doesn't need to remember in its file list.  The data
 116  * will survive just long enough to be used by send_file_entry(). */
 117 static dev_t tmp_rdev;
 118 #ifdef SUPPORT_HARD_LINKS
 119 static int64 tmp_dev, tmp_ino;
 120 #endif
 121 static char tmp_sum[MAX_DIGEST_LEN];
 122
 123 static char empty_sum[MAX_DIGEST_LEN];
 124 static int flist_count_offset; /* for --delete --progress */
 125 static int dir_count = 0;
 126
 127 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 128 static void output_flist(struct file_list *flist);
 129
 130 void init_flist(void)
 131 {
 132         if (verbose > 4) {
 133                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 134                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 135         }
 136         checksum_len = protocol_version < 21 ? 2
 137                      : protocol_version < 30 ? MD4_DIGEST_LEN
 138                      : MD5_DIGEST_LEN;
 139 }
 140
 141 static int show_filelist_p(void)
 142 {
 143         return verbose && xfer_dirs && !am_server && !inc_recurse;
 144 }
 145
 146 static void start_filelist_progress(char *kind)
 147 {
 148         rprintf(FCLIENT, "%s ... ", kind);
 149         if (verbose > 1 || do_progress)
 150                 rprintf(FCLIENT, "\n");
 151         rflush(FINFO);
 152 }
 153
 154 static void emit_filelist_progress(int count)
 155 {
 156         rprintf(FCLIENT, " %d files...\r", count);
 157 }
 158
 159 static void maybe_emit_filelist_progress(int count)
 160 {
 161         if (do_progress && show_filelist_p() && (count % 100) == 0)
 162                 emit_filelist_progress(count);
 163 }
 164
 165 static void finish_filelist_progress(const struct file_list *flist)
 166 {
 167         if (do_progress) {
 168                 /* This overwrites the progress line */
 169                 rprintf(FINFO, "%d file%sto consider\n",
 170                         flist->used, flist->used == 1 ? " " : "s ");
 171         } else
 172                 rprintf(FINFO, "done\n");
 173 }
 174
 175 void show_flist_stats(void)
 176 {
 177         /* Nothing yet */
 178 }
 179
 180 /* Stat either a symlink or its referent, depending on the settings of
 181  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 182  *
 183  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 184  * MAXPATHLEN chars) will be set to the symlink's target string.
 185  *
 186  * The stat structure pointed to by stp will contain information about the
 187  * link or the referent as appropriate, if they exist. */
 188 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 189 {
 190 #ifdef SUPPORT_LINKS
 191         if (link_stat(path, stp, copy_dirlinks) < 0)
 192                 return -1;
 193         if (S_ISLNK(stp->st_mode)) {
 194                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 195                 if (llen < 0)
 196                         return -1;
 197                 linkbuf[llen] = '\0';
 198                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 199                         if (verbose > 1) {
 200                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 201                                         path, linkbuf);
 202                         }
 203                         return x_stat(path, stp, NULL);
 204                 }
 205                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 206                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 207                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 208                                 llen - SYMLINK_PREFIX_LEN + 1);
 209                 }
 210         }
 211         return 0;
 212 #else
 213         return x_stat(path, stp, NULL);
 214 #endif
 215 }
 216
 217 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 218 {
 219 #ifdef SUPPORT_LINKS
 220         if (copy_links)
 221                 return x_stat(path, stp, NULL);
 222         if (x_lstat(path, stp, NULL) < 0)
 223                 return -1;
 224         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 225                 STRUCT_STAT st;
 226                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 227                         *stp = st;
 228         }
 229         return 0;
 230 #else
 231         return x_stat(path, stp, NULL);
 232 #endif
 233 }
 234
 235 static inline int is_daemon_excluded(const char *fname, int is_dir)
 236 {
 237         if (daemon_filter_list.head
 238          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 239                 errno = ENOENT;
 240                 return 1;
 241         }
 242         return 0;
 243 }
 244
 245 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 246 {
 247         if (daemon_filter_list.head) {
 248                 char *slash = path;
 249
 250                 while ((slash = strchr(slash+1, '/')) != NULL) {
 251                         int ret;
 252                         *slash = '\0';
 253                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 254                         *slash = '/';
 255                         if (ret < 0) {
 256                                 errno = ENOENT;
 257                                 return 1;
 258                         }
 259                 }
 260
 261                 if (!ignore_filename
 262                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 263                         errno = ENOENT;
 264                         return 1;
 265                 }
 266         }
 267
 268         return 0;
 269 }
 270
 271 /* This function is used to check if a file should be included/excluded
 272  * from the list of files based on its name and type etc.  The value of
 273  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 274 static int is_excluded(const char *fname, int is_dir, int filter_level)
 275 {
 276 #if 0 /* This currently never happens, so avoid a useless compare. */
 277         if (filter_level == NO_FILTERS)
 278                 return 0;
 279 #endif
 280         if (is_daemon_excluded(fname, is_dir))
 281                 return 1;
 282         if (filter_level != ALL_FILTERS)
 283                 return 0;
 284         if (filter_list.head
 285             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 286                 return 1;
 287         return 0;
 288 }
 289
 290 static void send_directory(int f, struct file_list *flist,
 291                            char *fbuf, int len, int flags);
 292
 293 static const char *pathname, *orig_dir;
 294 static int pathname_len;
 295
 296 /* Make sure flist can hold at least flist->used + extra entries. */
 297 static void flist_expand(struct file_list *flist, int extra)
 298 {
 299         struct file_struct **new_ptr;
 300
 301         if (flist->used + extra <= flist->malloced)
 302                 return;
 303
 304         if (flist->malloced < FLIST_START)
 305                 flist->malloced = FLIST_START;
 306         else if (flist->malloced >= FLIST_LINEAR)
 307                 flist->malloced += FLIST_LINEAR;
 308         else
 309                 flist->malloced *= 2;
 310
 311         /* In case count jumped or we are starting the list
 312          * with a known size just set it. */
 313         if (flist->malloced < flist->used + extra)
 314                 flist->malloced = flist->used + extra;
 315
 316         new_ptr = realloc_array(flist->files, struct file_struct *,
 317                                 flist->malloced);
 318
 319         if (verbose >= 2 && flist->malloced != FLIST_START) {
 320                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 321                     who_am_i(),
 322                     (double)sizeof flist->files[0] * flist->malloced,
 323                     (new_ptr == flist->files) ? " not" : "");
 324         }
 325
 326         flist->files = new_ptr;
 327
 328         if (!flist->files)
 329                 out_of_memory("flist_expand");
 330 }
 331
 332 static void flist_done_allocating(struct file_list *flist)
 333 {
 334         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 335         if (flist->pool_boundary == ptr)
 336                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 337         else
 338                 flist->pool_boundary = ptr;
 339 }
 340
 341 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 342  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 343  * with dir == NULL taken to be the starting directory, and dirlen < 0
 344  * indicating that strdup(dir) should be called and then the -dirlen length
 345  * value checked to ensure that it is not daemon-excluded. */
 346 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 347 {
 348         if (dirlen < 0) {
 349                 char *cpy = strdup(dir);
 350                 if (*cpy != '/')
 351                         change_dir(orig_dir, CD_SKIP_CHDIR);
 352                 if (path_is_daemon_excluded(cpy, 0))
 353                         goto chdir_error;
 354                 dir = cpy;
 355                 dirlen = -dirlen;
 356         } else {
 357                 if (file) {
 358                         if (pathname == F_PATHNAME(file))
 359                                 return 1;
 360                         dir = F_PATHNAME(file);
 361                         if (dir)
 362                                 dirlen = strlen(dir);
 363                 } else if (pathname == dir)
 364                         return 1;
 365                 if (dir && *dir != '/')
 366                         change_dir(orig_dir, CD_SKIP_CHDIR);
 367         }
 368
 369         if (!change_dir(dir ? dir : orig_dir, CD_NORMAL)) {
 370           chdir_error:
 371                 io_error |= IOERR_GENERAL;
 372                 rsyserr(FERROR, errno, "change_dir %s failed", full_fname(dir));
 373                 change_dir(orig_dir, CD_NORMAL);
 374                 pathname = NULL;
 375                 pathname_len = 0;
 376                 return 0;
 377         }
 378
 379         pathname = dir;
 380         pathname_len = dirlen;
 381
 382         return 1;
 383 }
 384
 385 static void send_file_entry(int f, const char *fname, struct file_struct *file, int ndx, int first_ndx)
 386 {
 387         static time_t modtime;
 388         static mode_t mode;
 389 #ifdef SUPPORT_HARD_LINKS
 390         static int64 dev;
 391 #endif
 392         static dev_t rdev;
 393         static uint32 rdev_major;
 394         static uid_t uid;
 395         static gid_t gid;
 396         static const char *user_name, *group_name;
 397         static char lastname[MAXPATHLEN];
 398         int first_hlink_ndx = -1;
 399         int l1, l2;
 400         int xflags;
 401
 402         /* Initialize starting value of xflags. */
 403         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 404                 dir_count++;
 405                 if (file->flags & FLAG_CONTENT_DIR)
 406                         xflags = file->flags & FLAG_TOP_DIR;
 407                 else if (file->flags & FLAG_IMPLIED_DIR)
 408                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 409                 else
 410                         xflags = XMIT_NO_CONTENT_DIR;
 411         } else
 412                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 413
 414         if (file->mode == mode)
 415                 xflags |= XMIT_SAME_MODE;
 416         else
 417                 mode = file->mode;
 418
 419         if ((preserve_devices && IS_DEVICE(mode))
 420          || (preserve_specials && IS_SPECIAL(mode))) {
 421                 if (protocol_version < 28) {
 422                         if (tmp_rdev == rdev)
 423                                 xflags |= XMIT_SAME_RDEV_pre28;
 424                         else
 425                                 rdev = tmp_rdev;
 426                 } else {
 427                         rdev = tmp_rdev;
 428                         if ((uint32)major(rdev) == rdev_major)
 429                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 430                         else
 431                                 rdev_major = major(rdev);
 432                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 433                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 434                 }
 435         } else if (protocol_version < 28)
 436                 rdev = MAKEDEV(0, 0);
 437         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 438                 xflags |= XMIT_SAME_UID;
 439         else {
 440                 uid = F_OWNER(file);
 441                 if (!numeric_ids) {
 442                         user_name = add_uid(uid);
 443                         if (inc_recurse && user_name)
 444                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 445                 }
 446         }
 447         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 448                 xflags |= XMIT_SAME_GID;
 449         else {
 450                 gid = F_GROUP(file);
 451                 if (!numeric_ids) {
 452                         group_name = add_gid(gid);
 453                         if (inc_recurse && group_name)
 454                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 455                 }
 456         }
 457         if (file->modtime == modtime)
 458                 xflags |= XMIT_SAME_TIME;
 459         else
 460                 modtime = file->modtime;
 461
 462 #ifdef SUPPORT_HARD_LINKS
 463         if (tmp_dev != 0) {
 464                 if (protocol_version >= 30) {
 465                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 466                         first_hlink_ndx = (int32)(long)np->data - 1;
 467                         if (first_hlink_ndx < 0) {
 468                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 469                                 xflags |= XMIT_HLINK_FIRST;
 470                         }
 471                 } else {
 472                         if (tmp_dev == dev) {
 473                                 if (protocol_version >= 28)
 474                                         xflags |= XMIT_SAME_DEV_pre30;
 475                         } else
 476                                 dev = tmp_dev;
 477                 }
 478                 xflags |= XMIT_HLINKED;
 479         }
 480 #endif
 481
 482         for (l1 = 0;
 483             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 484             l1++) {}
 485         l2 = strlen(fname+l1);
 486
 487         if (l1 > 0)
 488                 xflags |= XMIT_SAME_NAME;
 489         if (l2 > 255)
 490                 xflags |= XMIT_LONG_NAME;
 491
 492         /* We must make sure we don't send a zero flag byte or the
 493          * other end will terminate the flist transfer.  Note that
 494          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 495          * it's harmless way to add a bit to the first flag byte. */
 496         if (protocol_version >= 28) {
 497                 if (!xflags && !S_ISDIR(mode))
 498                         xflags |= XMIT_TOP_DIR;
 499                 if ((xflags & 0xFF00) || !xflags) {
 500                         xflags |= XMIT_EXTENDED_FLAGS;
 501                         write_shortint(f, xflags);
 502                 } else
 503                         write_byte(f, xflags);
 504         } else {
 505                 if (!(xflags & 0xFF))
 506                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 507                 write_byte(f, xflags);
 508         }
 509         if (xflags & XMIT_SAME_NAME)
 510                 write_byte(f, l1);
 511         if (xflags & XMIT_LONG_NAME)
 512                 write_varint30(f, l2);
 513         else
 514                 write_byte(f, l2);
 515         write_buf(f, fname + l1, l2);
 516
 517         if (first_hlink_ndx >= 0) {
 518                 write_varint(f, first_hlink_ndx);
 519                 if (first_hlink_ndx >= first_ndx)
 520                         goto the_end;
 521         }
 522
 523         write_varlong30(f, F_LENGTH(file), 3);
 524         if (!(xflags & XMIT_SAME_TIME)) {
 525                 if (protocol_version >= 30)
 526                         write_varlong(f, modtime, 4);
 527                 else
 528                         write_int(f, modtime);
 529         }
 530         if (!(xflags & XMIT_SAME_MODE))
 531                 write_int(f, to_wire_mode(mode));
 532         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 533                 if (protocol_version < 30)
 534                         write_int(f, uid);
 535                 else {
 536                         write_varint(f, uid);
 537                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 538                                 int len = strlen(user_name);
 539                                 write_byte(f, len);
 540                                 write_buf(f, user_name, len);
 541                         }
 542                 }
 543         }
 544         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 545                 if (protocol_version < 30)
 546                         write_int(f, gid);
 547                 else {
 548                         write_varint(f, gid);
 549                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 550                                 int len = strlen(group_name);
 551                                 write_byte(f, len);
 552                                 write_buf(f, group_name, len);
 553                         }
 554                 }
 555         }
 556         if ((preserve_devices && IS_DEVICE(mode))
 557          || (preserve_specials && IS_SPECIAL(mode))) {
 558                 if (protocol_version < 28) {
 559                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 560                                 write_int(f, (int)rdev);
 561                 } else {
 562                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 563                                 write_varint30(f, major(rdev));
 564                         if (protocol_version >= 30)
 565                                 write_varint(f, minor(rdev));
 566                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 567                                 write_byte(f, minor(rdev));
 568                         else
 569                                 write_int(f, minor(rdev));
 570                 }
 571         }
 572
 573 #ifdef SUPPORT_LINKS
 574         if (preserve_links && S_ISLNK(mode)) {
 575                 const char *sl = F_SYMLINK(file);
 576                 int len = strlen(sl);
 577                 write_varint30(f, len);
 578                 write_buf(f, sl, len);
 579         }
 580 #endif
 581
 582 #ifdef SUPPORT_HARD_LINKS
 583         if (tmp_dev != 0 && protocol_version < 30) {
 584                 if (protocol_version < 26) {
 585                         /* 32-bit dev_t and ino_t */
 586                         write_int(f, (int32)dev);
 587                         write_int(f, (int32)tmp_ino);
 588                 } else {
 589                         /* 64-bit dev_t and ino_t */
 590                         if (!(xflags & XMIT_SAME_DEV_pre30))
 591                                 write_longint(f, dev);
 592                         write_longint(f, tmp_ino);
 593                 }
 594         }
 595 #endif
 596
 597         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 598                 const char *sum;
 599                 if (S_ISREG(mode))
 600                         sum = tmp_sum;
 601                 else {
 602                         /* Prior to 28, we sent a useless set of nulls. */
 603                         sum = empty_sum;
 604                 }
 605                 write_buf(f, sum, checksum_len);
 606         }
 607
 608   the_end:
 609         strlcpy(lastname, fname, MAXPATHLEN);
 610
 611         if (S_ISREG(mode) || S_ISLNK(mode))
 612                 stats.total_size += F_LENGTH(file);
 613 }
 614
 615 static struct file_struct *recv_file_entry(struct file_list *flist,
 616                                            int xflags, int f)
 617 {
 618         static int64 modtime;
 619         static mode_t mode;
 620 #ifdef SUPPORT_HARD_LINKS
 621         static int64 dev;
 622 #endif
 623         static dev_t rdev;
 624         static uint32 rdev_major;
 625         static uid_t uid;
 626         static gid_t gid;
 627         static uint16 gid_flags;
 628         static char lastname[MAXPATHLEN], *lastdir;
 629         static int lastdir_depth, lastdir_len = -1;
 630         static unsigned int del_hier_name_len = 0;
 631         static int in_del_hier = 0;
 632         char thisname[MAXPATHLEN];
 633         unsigned int l1 = 0, l2 = 0;
 634         int alloc_len, basename_len, linkname_len;
 635         int extra_len = file_extra_cnt * EXTRA_LEN;
 636         int first_hlink_ndx = -1;
 637         OFF_T file_length;
 638         const char *basename;
 639         struct file_struct *file;
 640         alloc_pool_t *pool;
 641         char *bp;
 642
 643         if (xflags & XMIT_SAME_NAME)
 644                 l1 = read_byte(f);
 645
 646         if (xflags & XMIT_LONG_NAME)
 647                 l2 = read_varint30(f);
 648         else
 649                 l2 = read_byte(f);
 650
 651         if (l2 >= MAXPATHLEN - l1) {
 652                 rprintf(FERROR,
 653                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 654                         xflags, l1, l2, lastname, who_am_i());
 655                 overflow_exit("recv_file_entry");
 656         }
 657
 658         strlcpy(thisname, lastname, l1 + 1);
 659         read_sbuf(f, &thisname[l1], l2);
 660         thisname[l1 + l2] = 0;
 661
 662         /* Abuse basename_len for a moment... */
 663         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 664
 665 #ifdef ICONV_OPTION
 666         if (ic_recv != (iconv_t)-1) {
 667                 xbuf outbuf, inbuf;
 668
 669                 INIT_CONST_XBUF(outbuf, thisname);
 670                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 671
 672                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 673                         io_error |= IOERR_GENERAL;
 674                         rprintf(FINFO,
 675                             "[%s] cannot convert filename: %s (%s)\n",
 676                             who_am_i(), lastname, strerror(errno));
 677                         outbuf.len = 0;
 678                 }
 679                 outbuf.buf[outbuf.len] = '\0';
 680         }
 681 #endif
 682
 683         if (*thisname)
 684                 clean_fname(thisname, 0);
 685
 686         if (sanitize_paths)
 687                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 688
 689         if ((basename = strrchr(thisname, '/')) != NULL) {
 690                 int len = basename++ - thisname;
 691                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 692                         lastdir = new_array(char, len + 1);
 693                         memcpy(lastdir, thisname, len);
 694                         lastdir[len] = '\0';
 695                         lastdir_len = len;
 696                         lastdir_depth = count_dir_elements(lastdir);
 697                 }
 698         } else
 699                 basename = thisname;
 700         basename_len = strlen(basename) + 1; /* count the '\0' */
 701
 702 #ifdef SUPPORT_HARD_LINKS
 703         if (protocol_version >= 30
 704          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 705                 first_hlink_ndx = read_varint(f);
 706                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 707                         rprintf(FERROR,
 708                                 "hard-link reference out of range: %d (%d)\n",
 709                                 first_hlink_ndx, flist->ndx_start + flist->used);
 710                         exit_cleanup(RERR_PROTOCOL);
 711                 }
 712                 if (first_hlink_ndx >= flist->ndx_start) {
 713                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 714                         file_length = F_LENGTH(first);
 715                         modtime = first->modtime;
 716                         mode = first->mode;
 717                         if (preserve_uid)
 718                                 uid = F_OWNER(first);
 719                         if (preserve_gid)
 720                                 gid = F_GROUP(first);
 721                         if ((preserve_devices && IS_DEVICE(mode))
 722                          || (preserve_specials && IS_SPECIAL(mode))) {
 723                                 uint32 *devp = F_RDEV_P(first);
 724                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 725                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 726                         }
 727                         if (preserve_links && S_ISLNK(mode))
 728                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 729                         else
 730                                 linkname_len = 0;
 731                         goto create_object;
 732                 }
 733         }
 734 #endif
 735
 736         file_length = read_varlong30(f, 3);
 737         if (!(xflags & XMIT_SAME_TIME)) {
 738                 if (protocol_version >= 30) {
 739                         modtime = read_varlong(f, 4);
 740 #if SIZEOF_TIME_T < SIZEOF_INT64
 741                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 742                                 rprintf(FERROR_XFER,
 743                                     "Time value of %s truncated on receiver.\n",
 744                                     lastname);
 745                         }
 746 #endif
 747                 } else
 748                         modtime = read_int(f);
 749         }
 750         if (!(xflags & XMIT_SAME_MODE))
 751                 mode = from_wire_mode(read_int(f));
 752
 753         if (chmod_modes && !S_ISLNK(mode))
 754                 mode = tweak_mode(mode, chmod_modes);
 755
 756         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 757                 if (protocol_version < 30)
 758                         uid = (uid_t)read_int(f);
 759                 else {
 760                         uid = (uid_t)read_varint(f);
 761                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 762                                 uid = recv_user_name(f, uid);
 763                         else if (inc_recurse && am_root && !numeric_ids)
 764                                 uid = match_uid(uid);
 765                 }
 766         }
 767         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 768                 if (protocol_version < 30)
 769                         gid = (gid_t)read_int(f);
 770                 else {
 771                         gid = (gid_t)read_varint(f);
 772                         gid_flags = 0;
 773                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 774                                 gid = recv_group_name(f, gid, &gid_flags);
 775                         else if (inc_recurse && (!am_root || !numeric_ids))
 776                                 gid = match_gid(gid, &gid_flags);
 777                 }
 778         }
 779
 780         if ((preserve_devices && IS_DEVICE(mode))
 781          || (preserve_specials && IS_SPECIAL(mode))) {
 782                 if (protocol_version < 28) {
 783                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 784                                 rdev = (dev_t)read_int(f);
 785                 } else {
 786                         uint32 rdev_minor;
 787                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 788                                 rdev_major = read_varint30(f);
 789                         if (protocol_version >= 30)
 790                                 rdev_minor = read_varint(f);
 791                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 792                                 rdev_minor = read_byte(f);
 793                         else
 794                                 rdev_minor = read_int(f);
 795                         rdev = MAKEDEV(rdev_major, rdev_minor);
 796                 }
 797                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 798                 file_length = 0;
 799         } else if (protocol_version < 28)
 800                 rdev = MAKEDEV(0, 0);
 801
 802 #ifdef SUPPORT_LINKS
 803         if (preserve_links && S_ISLNK(mode)) {
 804                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 805                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 806                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 807                                 linkname_len - 1);
 808                         overflow_exit("recv_file_entry");
 809                 }
 810                 if (munge_symlinks)
 811                         linkname_len += SYMLINK_PREFIX_LEN;
 812         }
 813         else
 814 #endif
 815                 linkname_len = 0;
 816
 817 #ifdef SUPPORT_HARD_LINKS
 818   create_object:
 819         if (preserve_hard_links) {
 820                 if (protocol_version < 28 && S_ISREG(mode))
 821                         xflags |= XMIT_HLINKED;
 822                 if (xflags & XMIT_HLINKED)
 823                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 824         }
 825 #endif
 826
 827 #ifdef SUPPORT_ACLS
 828         /* Directories need an extra int32 for the default ACL. */
 829         if (preserve_acls && S_ISDIR(mode))
 830                 extra_len += EXTRA_LEN;
 831 #endif
 832
 833         if (always_checksum && S_ISREG(mode))
 834                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 835
 836         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 837                 extra_len += EXTRA_LEN;
 838
 839         if (inc_recurse && S_ISDIR(mode)) {
 840                 if (one_file_system) {
 841                         /* Room to save the dir's device for -x */
 842                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 843                 }
 844                 pool = dir_flist->file_pool;
 845         } else
 846                 pool = flist->file_pool;
 847
 848 #if EXTRA_ROUNDING > 0
 849         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 850                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 851 #endif
 852
 853         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 854                   + linkname_len;
 855         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 856
 857         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 858         bp += extra_len;
 859         file = (struct file_struct *)bp;
 860         bp += FILE_STRUCT_LEN;
 861
 862         memcpy(bp, basename, basename_len);
 863
 864 #ifdef SUPPORT_HARD_LINKS
 865         if (xflags & XMIT_HLINKED)
 866                 file->flags |= FLAG_HLINKED;
 867 #endif
 868         file->modtime = (time_t)modtime;
 869         file->len32 = (uint32)file_length;
 870         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 871                 file->flags |= FLAG_LENGTH64;
 872                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 873         }
 874         file->mode = mode;
 875         if (preserve_uid)
 876                 F_OWNER(file) = uid;
 877         if (preserve_gid) {
 878                 F_GROUP(file) = gid;
 879                 file->flags |= gid_flags;
 880         }
 881         if (unsort_ndx)
 882                 F_NDX(file) = flist->used + flist->ndx_start;
 883
 884         if (basename != thisname) {
 885                 file->dirname = lastdir;
 886                 F_DEPTH(file) = lastdir_depth + 1;
 887         } else
 888                 F_DEPTH(file) = 1;
 889
 890         if (S_ISDIR(mode)) {
 891                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 892                         F_DEPTH(file)--;
 893                 if (protocol_version >= 30) {
 894                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 895                                 if (xflags & XMIT_TOP_DIR)
 896                                         file->flags |= FLAG_TOP_DIR;
 897                                 file->flags |= FLAG_CONTENT_DIR;
 898                         } else if (xflags & XMIT_TOP_DIR)
 899                                 file->flags |= FLAG_IMPLIED_DIR;
 900                 } else if (xflags & XMIT_TOP_DIR) {
 901                         in_del_hier = recurse;
 902                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 903                         if (relative_paths && del_hier_name_len > 2
 904                             && lastname[del_hier_name_len-1] == '.'
 905                             && lastname[del_hier_name_len-2] == '/')
 906                                 del_hier_name_len -= 2;
 907                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 908                 } else if (in_del_hier) {
 909                         if (!relative_paths || !del_hier_name_len
 910                          || (l1 >= del_hier_name_len
 911                           && lastname[del_hier_name_len] == '/'))
 912                                 file->flags |= FLAG_CONTENT_DIR;
 913                         else
 914                                 in_del_hier = 0;
 915                 }
 916         }
 917
 918         if ((preserve_devices && IS_DEVICE(mode))
 919          || (preserve_specials && IS_SPECIAL(mode))) {
 920                 uint32 *devp = F_RDEV_P(file);
 921                 DEV_MAJOR(devp) = major(rdev);
 922                 DEV_MINOR(devp) = minor(rdev);
 923         }
 924
 925 #ifdef SUPPORT_LINKS
 926         if (linkname_len) {
 927                 bp += basename_len;
 928                 if (first_hlink_ndx >= flist->ndx_start) {
 929                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 930                         memcpy(bp, F_SYMLINK(first), linkname_len);
 931                 } else if (munge_symlinks) {
 932                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 933                         bp += SYMLINK_PREFIX_LEN;
 934                         linkname_len -= SYMLINK_PREFIX_LEN;
 935                         read_sbuf(f, bp, linkname_len - 1);
 936                 } else {
 937                         read_sbuf(f, bp, linkname_len - 1);
 938                         if (sanitize_paths)
 939                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
 940                 }
 941         }
 942 #endif
 943
 944 #ifdef SUPPORT_HARD_LINKS
 945         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 946                 if (protocol_version >= 30) {
 947                         if (xflags & XMIT_HLINK_FIRST) {
 948                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
 949                         } else
 950                                 F_HL_GNUM(file) = first_hlink_ndx;
 951                 } else {
 952                         static int32 cnt = 0;
 953                         struct ht_int64_node *np;
 954                         int64 ino;
 955                         int32 ndx;
 956                         if (protocol_version < 26) {
 957                                 dev = read_int(f);
 958                                 ino = read_int(f);
 959                         } else {
 960                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 961                                         dev = read_longint(f);
 962                                 ino = read_longint(f);
 963                         }
 964                         np = idev_find(dev, ino);
 965                         ndx = (int32)(long)np->data - 1;
 966                         if (ndx < 0) {
 967                                 ndx = cnt++;
 968                                 np->data = (void*)(long)cnt;
 969                         }
 970                         F_HL_GNUM(file) = ndx;
 971                 }
 972         }
 973 #endif
 974
 975         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 976                 if (S_ISREG(mode))
 977                         bp = F_SUM(file);
 978                 else {
 979                         /* Prior to 28, we get a useless set of nulls. */
 980                         bp = tmp_sum;
 981                 }
 982                 if (first_hlink_ndx >= flist->ndx_start) {
 983                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 984                         memcpy(bp, F_SUM(first), checksum_len);
 985                 } else
 986                         read_buf(f, bp, checksum_len);
 987         }
 988
 989 #ifdef SUPPORT_ACLS
 990         if (preserve_acls && !S_ISLNK(mode))
 991                 receive_acl(file, f);
 992 #endif
 993 #ifdef SUPPORT_XATTRS
 994         if (preserve_xattrs)
 995                 receive_xattr(file, f );
 996 #endif
 997
 998         if (S_ISREG(mode) || S_ISLNK(mode))
 999                 stats.total_size += file_length;
1000
1001         return file;
1002 }
1003
1004 /* Create a file_struct for a named file by reading its stat() information
1005  * and performing extensive checks against global options.
1006  *
1007  * Returns a pointer to the new file struct, or NULL if there was an error
1008  * or this file should be excluded. */
1009 struct file_struct *make_file(const char *fname, struct file_list *flist,
1010                               STRUCT_STAT *stp, int flags, int filter_level)
1011 {
1012         static char *lastdir;
1013         static int lastdir_len = -1;
1014         struct file_struct *file;
1015         char thisname[MAXPATHLEN];
1016         char linkname[MAXPATHLEN];
1017         int alloc_len, basename_len, linkname_len;
1018         int extra_len = file_extra_cnt * EXTRA_LEN;
1019         const char *basename;
1020         alloc_pool_t *pool;
1021         STRUCT_STAT st;
1022         int excl_ret;
1023         char *bp;
1024
1025         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1026                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1027                 return NULL;
1028         }
1029         clean_fname(thisname, 0);
1030         if (sanitize_paths)
1031                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1032
1033         if (stp && S_ISDIR(stp->st_mode)) {
1034                 st = *stp; /* Needed for "symlink/." with --relative. */
1035                 *linkname = '\0'; /* make IBM code checker happy */
1036         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1037                 int save_errno = errno;
1038                 /* See if file is excluded before reporting an error. */
1039                 if (filter_level != NO_FILTERS
1040                  && (is_excluded(thisname, 0, filter_level)
1041                   || is_excluded(thisname, 1, filter_level))) {
1042                         if (ignore_perishable && save_errno != ENOENT)
1043                                 non_perishable_cnt++;
1044                         return NULL;
1045                 }
1046                 if (save_errno == ENOENT) {
1047 #ifdef SUPPORT_LINKS
1048                         /* When our options tell us to follow a symlink that
1049                          * points nowhere, tell the user about the symlink
1050                          * instead of giving a "vanished" message.  We only
1051                          * dereference a symlink if one of the --copy*links
1052                          * options was specified, so there's no need for the
1053                          * extra lstat() if one of these options isn't on. */
1054                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1055                          && x_lstat(thisname, &st, NULL) == 0
1056                          && S_ISLNK(st.st_mode)) {
1057                                 io_error |= IOERR_GENERAL;
1058                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1059                                         full_fname(thisname));
1060                         } else
1061 #endif
1062                         {
1063                                 enum logcode c = am_daemon && protocol_version < 28
1064                                                ? FERROR : FWARNING;
1065                                 io_error |= IOERR_VANISHED;
1066                                 rprintf(c, "file has vanished: %s\n",
1067                                         full_fname(thisname));
1068                         }
1069                 } else {
1070                         io_error |= IOERR_GENERAL;
1071                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1072                                 full_fname(thisname));
1073                 }
1074                 return NULL;
1075         }
1076
1077         /* backup.c calls us with filter_level set to NO_FILTERS. */
1078         if (filter_level == NO_FILTERS)
1079                 goto skip_filters;
1080
1081         if (S_ISDIR(st.st_mode)) {
1082                 if (!xfer_dirs) {
1083                         rprintf(FINFO, "skipping directory %s\n", thisname);
1084                         return NULL;
1085                 }
1086                 /* -x only affects dirs because we need to avoid recursing
1087                  * into a mount-point directory, not to avoid copying a
1088                  * symlinked file if -L (or similar) was specified. */
1089                 if (one_file_system && st.st_dev != filesystem_dev
1090                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1091                         if (one_file_system > 1) {
1092                                 if (verbose > 1) {
1093                                         rprintf(FINFO,
1094                                             "[%s] skipping mount-point dir %s\n",
1095                                             who_am_i(), thisname);
1096                                 }
1097                                 return NULL;
1098                         }
1099                         flags |= FLAG_MOUNT_DIR;
1100                         flags &= ~FLAG_CONTENT_DIR;
1101                 }
1102         } else
1103                 flags &= ~FLAG_CONTENT_DIR;
1104
1105         if (S_ISDIR(st.st_mode)) {
1106                 if (flags & FLAG_DOTDIR_NAME) {
1107                         /* A "." fname (or "/." fname in relative mode) is
1108                          * never excluded.  No other trailing-dotdir names
1109                          * are possible. */
1110                         excl_ret = 0;
1111                 } else
1112                         excl_ret = is_excluded(thisname, 1, filter_level);
1113         } else
1114                 excl_ret = is_excluded(thisname, 0, filter_level);
1115         if (excl_ret) {
1116                 if (ignore_perishable)
1117                         non_perishable_cnt++;
1118                 return NULL;
1119         }
1120
1121         if (lp_ignore_nonreadable(module_id)) {
1122 #ifdef SUPPORT_LINKS
1123                 if (!S_ISLNK(st.st_mode))
1124 #endif
1125                         if (access(thisname, R_OK) != 0)
1126                                 return NULL;
1127         }
1128
1129   skip_filters:
1130
1131         /* Only divert a directory in the main transfer. */
1132         if (flist) {
1133                 if (flist->prev && S_ISDIR(st.st_mode)
1134                  && flags & FLAG_DIVERT_DIRS) {
1135                         /* Room for parent/sibling/next-child info. */
1136                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1137                         if (relative_paths)
1138                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1139                         pool = dir_flist->file_pool;
1140                 } else
1141                         pool = flist->file_pool;
1142         } else {
1143 #ifdef SUPPORT_ACLS
1144                 /* Directories need an extra int32 for the default ACL. */
1145                 if (preserve_acls && S_ISDIR(st.st_mode))
1146                         extra_len += EXTRA_LEN;
1147 #endif
1148                 pool = NULL;
1149         }
1150
1151         if (verbose > 2) {
1152                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1153                         who_am_i(), thisname, filter_level);
1154         }
1155
1156         if ((basename = strrchr(thisname, '/')) != NULL) {
1157                 int len = basename++ - thisname;
1158                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1159                         lastdir = new_array(char, len + 1);
1160                         memcpy(lastdir, thisname, len);
1161                         lastdir[len] = '\0';
1162                         lastdir_len = len;
1163                 }
1164         } else
1165                 basename = thisname;
1166         basename_len = strlen(basename) + 1; /* count the '\0' */
1167
1168 #ifdef SUPPORT_LINKS
1169         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1170 #else
1171         linkname_len = 0;
1172 #endif
1173
1174         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1175                 extra_len += EXTRA_LEN;
1176
1177 #if EXTRA_ROUNDING > 0
1178         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1179                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1180 #endif
1181
1182         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1183                   + linkname_len;
1184         if (pool)
1185                 bp = pool_alloc(pool, alloc_len, "make_file");
1186         else {
1187                 if (!(bp = new_array(char, alloc_len)))
1188                         out_of_memory("make_file");
1189         }
1190
1191         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1192         bp += extra_len;
1193         file = (struct file_struct *)bp;
1194         bp += FILE_STRUCT_LEN;
1195
1196         memcpy(bp, basename, basename_len);
1197
1198 #ifdef SUPPORT_HARD_LINKS
1199         if (preserve_hard_links && flist && flist->prev) {
1200                 if (protocol_version >= 28
1201                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1202                  : S_ISREG(st.st_mode)) {
1203                         tmp_dev = st.st_dev;
1204                         tmp_ino = st.st_ino;
1205                 } else
1206                         tmp_dev = 0;
1207         }
1208 #endif
1209
1210 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1211         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1212                 tmp_rdev = st.st_rdev;
1213                 st.st_size = 0;
1214         }
1215 #endif
1216
1217         file->flags = flags;
1218         file->modtime = st.st_mtime;
1219         file->len32 = (uint32)st.st_size;
1220         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1221                 file->flags |= FLAG_LENGTH64;
1222                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1223         }
1224         file->mode = st.st_mode;
1225         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1226                 F_OWNER(file) = st.st_uid;
1227         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1228                 F_GROUP(file) = st.st_gid;
1229
1230         if (basename != thisname)
1231                 file->dirname = lastdir;
1232
1233 #ifdef SUPPORT_LINKS
1234         if (linkname_len)
1235                 memcpy(bp + basename_len, linkname, linkname_len);
1236 #endif
1237
1238         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1239                 file_checksum(thisname, tmp_sum, st.st_size);
1240
1241         if (am_sender)
1242                 F_PATHNAME(file) = pathname;
1243         else if (!pool)
1244                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1245
1246         /* This code is only used by the receiver when it is building
1247          * a list of files for a delete pass. */
1248         if (keep_dirlinks && linkname_len && flist) {
1249                 STRUCT_STAT st2;
1250                 int save_mode = file->mode;
1251                 file->mode = S_IFDIR; /* Find a directory with our name. */
1252                 if (flist_find(dir_flist, file) >= 0
1253                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1254                         file->modtime = st2.st_mtime;
1255                         file->len32 = 0;
1256                         file->mode = st2.st_mode;
1257                         if (uid_ndx)
1258                                 F_OWNER(file) = st2.st_uid;
1259                         if (gid_ndx)
1260                                 F_GROUP(file) = st2.st_gid;
1261                 } else
1262                         file->mode = save_mode;
1263         }
1264
1265         if (basename_len == 0+1) {
1266                 if (!pool)
1267                         unmake_file(file);
1268                 return NULL;
1269         }
1270
1271         if (unsort_ndx)
1272                 F_NDX(file) = dir_count;
1273
1274         return file;
1275 }
1276
1277 /* Only called for temporary file_struct entries created by make_file(). */
1278 void unmake_file(struct file_struct *file)
1279 {
1280         free(REQ_EXTRA(file, F_DEPTH(file)));
1281 }
1282
1283 static struct file_struct *send_file_name(int f, struct file_list *flist,
1284                                           const char *fname, STRUCT_STAT *stp,
1285                                           int flags, int filter_level)
1286 {
1287         struct file_struct *file;
1288
1289         file = make_file(fname, flist, stp, flags, filter_level);
1290         if (!file)
1291                 return NULL;
1292
1293         if (chmod_modes && !S_ISLNK(file->mode))
1294                 file->mode = tweak_mode(file->mode, chmod_modes);
1295
1296         if (f >= 0) {
1297                 char fbuf[MAXPATHLEN];
1298 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1299                 stat_x sx;
1300 #endif
1301
1302 #ifdef ICONV_OPTION
1303                 if (ic_send != (iconv_t)-1) {
1304                         xbuf outbuf, inbuf;
1305
1306                         INIT_CONST_XBUF(outbuf, fbuf);
1307
1308                         if (file->dirname) {
1309                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1310                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1311                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1312                                         goto convert_error;
1313                                 outbuf.size += 2;
1314                                 outbuf.buf[outbuf.len++] = '/';
1315                         }
1316
1317                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1318                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1319                           convert_error:
1320                                 io_error |= IOERR_GENERAL;
1321                                 rprintf(FINFO,
1322                                     "[%s] cannot convert filename: %s (%s)\n",
1323                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1324                                 return NULL;
1325                         }
1326                         outbuf.buf[outbuf.len] = '\0';
1327                 } else
1328 #endif
1329                         f_name(file, fbuf);
1330
1331 #ifdef SUPPORT_ACLS
1332                 if (preserve_acls && !S_ISLNK(file->mode)) {
1333                         sx.st.st_mode = file->mode;
1334                         sx.acc_acl = sx.def_acl = NULL;
1335                         if (get_acl(fname, &sx) < 0)
1336                                 return NULL;
1337                 }
1338 #endif
1339 #ifdef SUPPORT_XATTRS
1340                 if (preserve_xattrs) {
1341                         sx.xattr = NULL;
1342                         if (get_xattr(fname, &sx) < 0)
1343                                 return NULL;
1344                 }
1345 #endif
1346
1347                 send_file_entry(f, fbuf, file, flist->used, flist->ndx_start);
1348
1349 #ifdef SUPPORT_ACLS
1350                 if (preserve_acls && !S_ISLNK(file->mode)) {
1351                         send_acl(&sx, f);
1352                         free_acl(&sx);
1353                 }
1354 #endif
1355 #ifdef SUPPORT_XATTRS
1356                 if (preserve_xattrs) {
1357                         F_XATTR(file) = send_xattr(&sx, f);
1358                         free_xattr(&sx);
1359                 }
1360 #endif
1361         }
1362
1363         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1364
1365         flist_expand(flist, 1);
1366         flist->files[flist->used++] = file;
1367
1368         return file;
1369 }
1370
1371 static void send_if_directory(int f, struct file_list *flist,
1372                               struct file_struct *file,
1373                               char *fbuf, unsigned int ol,
1374                               int flags)
1375 {
1376         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1377
1378         if (S_ISDIR(file->mode)
1379             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1380                 void *save_filters;
1381                 unsigned int len = strlen(fbuf);
1382                 if (len > 1 && fbuf[len-1] == '/')
1383                         fbuf[--len] = '\0';
1384                 if (len >= MAXPATHLEN - 1) {
1385                         io_error |= IOERR_GENERAL;
1386                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1387                                 full_fname(fbuf));
1388                         return;
1389                 }
1390                 save_filters = push_local_filters(fbuf, len);
1391                 send_directory(f, flist, fbuf, len, flags);
1392                 pop_local_filters(save_filters);
1393                 fbuf[ol] = '\0';
1394                 if (is_dot_dir)
1395                         fbuf[ol-1] = '.';
1396         }
1397 }
1398
1399 static int file_compare(const void *file1, const void *file2)
1400 {
1401         return f_name_cmp(*(struct file_struct **)file1,
1402                           *(struct file_struct **)file2);
1403 }
1404
1405 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1406  * version, but I (Wayne) changed the merge code to do less copying and
1407  * to require only half the amount of temporary memory. */
1408 static void fsort_tmp(struct file_struct **fp, size_t num,
1409                       struct file_struct **tmp)
1410 {
1411         struct file_struct **f1, **f2, **t;
1412         size_t n1, n2;
1413
1414         n1 = num / 2;
1415         n2 = num - n1;
1416         f1 = fp;
1417         f2 = fp + n1;
1418
1419         if (n1 > 1)
1420                 fsort_tmp(f1, n1, tmp);
1421         if (n2 > 1)
1422                 fsort_tmp(f2, n2, tmp);
1423
1424         while (f_name_cmp(*f1, *f2) <= 0) {
1425                 if (!--n1)
1426                         return;
1427                 f1++;
1428         }
1429
1430         t = tmp;
1431         memcpy(t, f1, n1 * PTR_SIZE);
1432
1433         *f1++ = *f2++, n2--;
1434
1435         while (n1 > 0 && n2 > 0) {
1436                 if (f_name_cmp(*t, *f2) <= 0)
1437                         *f1++ = *t++, n1--;
1438                 else
1439                         *f1++ = *f2++, n2--;
1440         }
1441
1442         if (n1 > 0)
1443                 memcpy(f1, t, n1 * PTR_SIZE);
1444 }
1445
1446 /* This file-struct sorting routine makes sure that any identical names in
1447  * the file list stay in the same order as they were in the original list.
1448  * This is particularly vital in inc_recurse mode where we expect a sort
1449  * on the flist to match the exact order of a sort on the dir_flist. */
1450 static void fsort(struct file_struct **fp, size_t num)
1451 {
1452         if (num <= 1)
1453                 return;
1454
1455         if (use_qsort)
1456                 qsort(fp, num, PTR_SIZE, file_compare);
1457         else {
1458                 struct file_struct **tmp = new_array(struct file_struct *,
1459                                                      (num+1) / 2);
1460                 fsort_tmp(fp, num, tmp);
1461                 free(tmp);
1462         }
1463 }
1464
1465 /* We take an entire set of sibling dirs from the sorted flist and link them
1466  * into the tree, setting the appropriate parent/child/sibling pointers. */
1467 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1468                              int dir_cnt)
1469 {
1470         int i;
1471         int32 *dp = NULL;
1472         int32 *parent_dp = parent_ndx < 0 ? NULL
1473                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1474
1475         flist_expand(dir_flist, dir_cnt);
1476         dir_flist->sorted = dir_flist->files;
1477
1478         for (i = 0; dir_cnt; i++) {
1479                 struct file_struct *file = from_flist->sorted[i];
1480
1481                 if (!S_ISDIR(file->mode))
1482                         continue;
1483
1484                 dir_flist->files[dir_flist->used++] = file;
1485                 dir_cnt--;
1486
1487                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1488                         continue;
1489
1490                 if (dp)
1491                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1492                 else if (parent_dp)
1493                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1494                 else
1495                         send_dir_ndx = dir_flist->used - 1;
1496
1497                 dp = F_DIR_NODE_P(file);
1498                 DIR_PARENT(dp) = parent_ndx;
1499                 DIR_FIRST_CHILD(dp) = -1;
1500         }
1501         if (dp)
1502                 DIR_NEXT_SIBLING(dp) = -1;
1503 }
1504
1505 /* This function is normally called by the sender, but the receiving side also
1506  * calls it from get_dirlist() with f set to -1 so that we just construct the
1507  * file list in memory without sending it over the wire.  Also, get_dirlist()
1508  * might call this with f set to -2, which also indicates that local filter
1509  * rules should be ignored. */
1510 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1511                            int flags)
1512 {
1513         struct dirent *di;
1514         unsigned remainder;
1515         char *p;
1516         DIR *d;
1517         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1518         int start = flist->used;
1519         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1520
1521         assert(flist != NULL);
1522
1523         if (!(d = opendir(fbuf))) {
1524                 io_error |= IOERR_GENERAL;
1525                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1526                 return;
1527         }
1528
1529         p = fbuf + len;
1530         if (len != 1 || *fbuf != '/')
1531                 *p++ = '/';
1532         *p = '\0';
1533         remainder = MAXPATHLEN - (p - fbuf);
1534
1535         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1536                 char *dname = d_name(di);
1537                 if (dname[0] == '.' && (dname[1] == '\0'
1538                     || (dname[1] == '.' && dname[2] == '\0')))
1539                         continue;
1540                 if (strlcpy(p, dname, remainder) >= remainder) {
1541                         io_error |= IOERR_GENERAL;
1542                         rprintf(FINFO,
1543                                 "cannot send long-named file %s\n",
1544                                 full_fname(fbuf));
1545                         continue;
1546                 }
1547                 if (dname[0] == '\0') {
1548                         io_error |= IOERR_GENERAL;
1549                         rprintf(FINFO,
1550                                 "cannot send file with empty name in %s\n",
1551                                 full_fname(fbuf));
1552                         continue;
1553                 }
1554
1555                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1556         }
1557
1558         fbuf[len] = '\0';
1559
1560         if (errno) {
1561                 io_error |= IOERR_GENERAL;
1562                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1563         }
1564
1565         closedir(d);
1566
1567         if (f >= 0 && recurse && !divert_dirs) {
1568                 int i, end = flist->used - 1;
1569                 /* send_if_directory() bumps flist->used, so use "end". */
1570                 for (i = start; i <= end; i++)
1571                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1572         }
1573 }
1574
1575 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1576                               char *start, char *limit, int flags, char name_type)
1577 {
1578         static char lastpath[MAXPATHLEN] = "";
1579         static int lastpath_len = 0;
1580         static struct file_struct *lastpath_struct = NULL;
1581         struct file_struct *file;
1582         item_list *relname_list;
1583         relnamecache **rnpp;
1584         int len, need_new_dir, depth = 0;
1585         struct filter_list_struct save_filter_list = filter_list;
1586
1587         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1588         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1589
1590         if (inc_recurse) {
1591                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1592                  && lastpath_len == limit - fname
1593                  && strncmp(lastpath, fname, lastpath_len) == 0)
1594                         need_new_dir = 0;
1595                 else
1596                         need_new_dir = 1;
1597         } else {
1598                 char *tp = fname, *lp = lastpath;
1599                 /* Skip any initial directories in our path that we
1600                  * have in common with lastpath. */
1601                 assert(start == fname);
1602                 for ( ; ; tp++, lp++) {
1603                         if (tp == limit) {
1604                                 if (*lp == '/' || *lp == '\0')
1605                                         goto done;
1606                                 break;
1607                         }
1608                         if (*lp != *tp)
1609                                 break;
1610                         if (*tp == '/') {
1611                                 start = tp;
1612                                 depth++;
1613                         }
1614                 }
1615                 need_new_dir = 1;
1616         }
1617
1618         if (need_new_dir) {
1619                 int save_copy_links = copy_links;
1620                 int save_xfer_dirs = xfer_dirs;
1621                 char *slash;
1622
1623                 copy_links = xfer_dirs = 1;
1624
1625                 *limit = '\0';
1626
1627                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1628                         *slash = '\0';
1629                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1630                         depth++;
1631                         if (!inc_recurse && file && S_ISDIR(file->mode))
1632                                 change_local_filter_dir(fname, strlen(fname), depth);
1633                         *slash = '/';
1634                 }
1635
1636                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1637                 if (inc_recurse) {
1638                         if (file && !S_ISDIR(file->mode))
1639                                 file = NULL;
1640                         lastpath_struct = file;
1641                 } else if (file && S_ISDIR(file->mode))
1642                         change_local_filter_dir(fname, strlen(fname), ++depth);
1643
1644                 strlcpy(lastpath, fname, sizeof lastpath);
1645                 lastpath_len = limit - fname;
1646
1647                 *limit = '/';
1648
1649                 copy_links = save_copy_links;
1650                 xfer_dirs = save_xfer_dirs;
1651
1652                 if (!inc_recurse)
1653                         goto done;
1654         }
1655
1656         if (!lastpath_struct)
1657                 goto done; /* dir must have vanished */
1658
1659         len = strlen(limit+1);
1660         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1661         if (!relname_list) {
1662                 if (!(relname_list = new0(item_list)))
1663                         out_of_memory("send_implied_dirs");
1664                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1665         }
1666         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1667         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1668                 out_of_memory("send_implied_dirs");
1669         (*rnpp)->name_type = name_type;
1670         strlcpy((*rnpp)->fname, limit+1, len + 1);
1671
1672 done:
1673         filter_list = save_filter_list;
1674 }
1675
1676 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1677 {
1678         char fbuf[MAXPATHLEN];
1679         item_list *relname_list;
1680         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1681         size_t j;
1682
1683         f_name(file, fbuf);
1684         dlen = strlen(fbuf);
1685
1686         if (!change_pathname(file, NULL, 0))
1687                 exit_cleanup(RERR_FILESELECT);
1688
1689         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1690
1691         if (file->flags & FLAG_CONTENT_DIR) {
1692                 if (one_file_system) {
1693                         STRUCT_STAT st;
1694                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1695                                 io_error |= IOERR_GENERAL;
1696                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1697                                         full_fname(fbuf));
1698                                 return;
1699                         }
1700                         filesystem_dev = st.st_dev;
1701                 }
1702                 send_directory(f, flist, fbuf, dlen, flags);
1703         }
1704
1705         if (!relative_paths)
1706                 return;
1707
1708         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1709         if (!relname_list)
1710                 return;
1711
1712         for (j = 0; j < relname_list->count; j++) {
1713                 char *slash;
1714                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1715                 char name_type = rnp->name_type;
1716
1717                 fbuf[dlen] = '/';
1718                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1719                 free(rnp);
1720                 if (len >= (int)sizeof fbuf)
1721                         continue; /* Impossible... */
1722
1723                 slash = strchr(fbuf+dlen+1, '/');
1724                 if (slash) {
1725                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1726                         continue;
1727                 }
1728
1729                 if (name_type != NORMAL_NAME) {
1730                         STRUCT_STAT st;
1731                         if (link_stat(fbuf, &st, 1) != 0) {
1732                                 io_error |= IOERR_GENERAL;
1733                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1734                                         full_fname(fbuf));
1735                                 continue;
1736                         }
1737                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1738                 } else
1739                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1740         }
1741
1742         free(relname_list);
1743 }
1744
1745 void send_extra_file_list(int f, int at_least)
1746 {
1747         struct file_list *flist;
1748         int64 start_write;
1749         uint16 prev_flags;
1750         int old_cnt, save_io_error = io_error;
1751
1752         if (flist_eof)
1753                 return;
1754
1755         /* Keep sending data until we have the requested number of
1756          * files in the upcoming file-lists. */
1757         old_cnt = cur_flist->used;
1758         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1759                 old_cnt += flist->used;
1760         while (file_total - old_cnt < at_least) {
1761                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1762                 int dir_ndx, dstart = dir_count;
1763                 const char *pathname = F_PATHNAME(file);
1764                 int32 *dp;
1765
1766                 flist = flist_new(0, "send_extra_file_list");
1767                 start_write = stats.total_written;
1768
1769                 if (unsort_ndx)
1770                         dir_ndx = F_NDX(file);
1771                 else
1772                         dir_ndx = send_dir_ndx;
1773                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1774                 flist->parent_ndx = dir_ndx;
1775
1776                 send1extra(f, file, flist);
1777                 prev_flags = file->flags;
1778                 dp = F_DIR_NODE_P(file);
1779
1780                 /* If there are any duplicate directory names that follow, we
1781                  * send all the dirs together in one file-list.  The dir_flist
1782                  * tree links all the child subdirs onto the last dup dir. */
1783                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1784                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1785                         send_dir_ndx = dir_ndx;
1786                         file = dir_flist->sorted[dir_ndx];
1787                         /* Try to avoid some duplicate scanning of identical dirs. */
1788                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1789                                 file->flags &= ~FLAG_CONTENT_DIR;
1790                         send1extra(f, file, flist);
1791                         prev_flags = file->flags;
1792                         dp = F_DIR_NODE_P(file);
1793                 }
1794
1795                 write_byte(f, 0);
1796
1797                 if (need_unsorted_flist) {
1798                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1799                                 out_of_memory("send_extra_file_list");
1800                         memcpy(flist->sorted, flist->files,
1801                                flist->used * sizeof (struct file_struct*));
1802                 } else
1803                         flist->sorted = flist->files;
1804
1805                 flist_sort_and_clean(flist, 0);
1806
1807                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1808                 flist_done_allocating(flist);
1809
1810                 file_total += flist->used;
1811                 stats.flist_size += stats.total_written - start_write;
1812                 stats.num_files += flist->used;
1813                 if (verbose > 3)
1814                         output_flist(flist);
1815
1816                 if (DIR_FIRST_CHILD(dp) >= 0) {
1817                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1818                         send_dir_depth++;
1819                 } else {
1820                         while (DIR_NEXT_SIBLING(dp) < 0) {
1821                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1822                                         write_ndx(f, NDX_FLIST_EOF);
1823                                         flist_eof = 1;
1824                                         change_local_filter_dir(NULL, 0, 0);
1825                                         goto finish;
1826                                 }
1827                                 send_dir_depth--;
1828                                 file = dir_flist->sorted[send_dir_ndx];
1829                                 dp = F_DIR_NODE_P(file);
1830                         }
1831                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1832                 }
1833         }
1834
1835   finish:
1836         if (io_error != save_io_error && !ignore_errors)
1837                 send_msg_int(MSG_IO_ERROR, io_error);
1838 }
1839
1840 struct file_list *send_file_list(int f, int argc, char *argv[])
1841 {
1842         static const char *lastdir;
1843         static int lastdir_len = -1;
1844         int len, dirlen;
1845         STRUCT_STAT st;
1846         char *p, *dir;
1847         struct file_list *flist;
1848         struct timeval start_tv, end_tv;
1849         int64 start_write;
1850         int use_ff_fd = 0;
1851         int disable_buffering;
1852         int arg_flags, flags = recurse ? FLAG_CONTENT_DIR : 0;
1853         int reading_remotely = filesfrom_host != NULL;
1854         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1855 #ifdef ICONV_OPTION
1856                      | (filesfrom_convert ? RL_CONVERT : 0)
1857 #endif
1858                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1859         int implied_dot_dir = 0;
1860
1861         rprintf(FLOG, "building file list\n");
1862         if (show_filelist_p())
1863                 start_filelist_progress("building file list");
1864         else if (inc_recurse && verbose && !am_server)
1865                 rprintf(FCLIENT, "sending incremental file list\n");
1866
1867         start_write = stats.total_written;
1868         gettimeofday(&start_tv, NULL);
1869
1870         if (!orig_dir)
1871                 orig_dir = strdup(curr_dir);
1872
1873         if (relative_paths && protocol_version >= 30)
1874                 implied_dirs = 1; /* We send flagged implied dirs */
1875
1876 #ifdef SUPPORT_HARD_LINKS
1877         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1878                 init_hard_links();
1879 #endif
1880
1881         flist = cur_flist = flist_new(0, "send_file_list");
1882         if (inc_recurse) {
1883                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1884                 flags |= FLAG_DIVERT_DIRS;
1885         } else
1886                 dir_flist = cur_flist;
1887
1888         disable_buffering = io_start_buffering_out(f);
1889         if (filesfrom_fd >= 0) {
1890                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
1891                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
1892                                 full_fname(argv[0]));
1893                         exit_cleanup(RERR_FILESELECT);
1894                 }
1895                 use_ff_fd = 1;
1896         }
1897
1898         while (1) {
1899                 char fbuf[MAXPATHLEN], *fn, name_type;
1900
1901                 if (use_ff_fd) {
1902                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1903                                 break;
1904                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1905                 } else {
1906                         if (argc-- == 0)
1907                                 break;
1908                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1909                         if (sanitize_paths)
1910                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1911                 }
1912
1913                 len = strlen(fbuf);
1914                 if (relative_paths) {
1915                         /* We clean up fbuf below. */
1916                         name_type = NORMAL_NAME;
1917                 } else if (!len || fbuf[len - 1] == '/') {
1918                         if (len == 2 && fbuf[0] == '.') {
1919                                 /* Turn "./" into just "." rather than "./." */
1920                                 fbuf[--len] = '\0';
1921                         } else {
1922                                 if (len + 1 >= MAXPATHLEN)
1923                                         overflow_exit("send_file_list");
1924                                 fbuf[len++] = '.';
1925                                 fbuf[len] = '\0';
1926                         }
1927                         name_type = DOTDIR_NAME;
1928                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1929                     && (len == 2 || fbuf[len-3] == '/')) {
1930                         if (len + 2 >= MAXPATHLEN)
1931                                 overflow_exit("send_file_list");
1932                         fbuf[len++] = '/';
1933                         fbuf[len++] = '.';
1934                         fbuf[len] = '\0';
1935                         name_type = DOTDIR_NAME;
1936                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1937                         name_type = DOTDIR_NAME;
1938                 else
1939                         name_type = NORMAL_NAME;
1940
1941                 dir = NULL;
1942
1943                 if (!relative_paths) {
1944                         p = strrchr(fbuf, '/');
1945                         if (p) {
1946                                 *p = '\0';
1947                                 if (p == fbuf)
1948                                         dir = "/";
1949                                 else
1950                                         dir = fbuf;
1951                                 len -= p - fbuf + 1;
1952                                 fn = p + 1;
1953                         } else
1954                                 fn = fbuf;
1955                 } else {
1956                         if ((p = strstr(fbuf, "/./")) != NULL) {
1957                                 *p = '\0';
1958                                 if (p == fbuf)
1959                                         dir = "/";
1960                                 else {
1961                                         dir = fbuf;
1962                                         clean_fname(dir, 0);
1963                                 }
1964                                 fn = p + 3;
1965                                 while (*fn == '/')
1966                                         fn++;
1967                                 if (!*fn)
1968                                         *--fn = '\0'; /* ensure room for '.' */
1969                         } else
1970                                 fn = fbuf;
1971                         /* A leading ./ can be used in relative mode to affect
1972                          * the dest dir without its name being in the path. */
1973                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
1974                                 send_file_name(f, flist, ".", NULL,
1975                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
1976                                     ALL_FILTERS);
1977                                 implied_dot_dir = 1;
1978                         }
1979                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
1980                                             | CFN_DROP_TRAILING_DOT_DIR);
1981                         if (len == 1) {
1982                                 if (fn[0] == '/') {
1983                                         fn = "/.";
1984                                         len = 2;
1985                                         name_type = DOTDIR_NAME;
1986                                 } else if (fn[0] == '.')
1987                                         name_type = DOTDIR_NAME;
1988                         } else if (fn[len-1] == '/') {
1989                                 fn[--len] = '\0';
1990                                 if (len == 1 && *fn == '.')
1991                                         name_type = DOTDIR_NAME;
1992                                 else
1993                                         name_type = SLASH_ENDING_NAME;
1994                         }
1995                         /* Reject a ".." dir in the active part of the path. */
1996                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1997                                 if ((p[2] == '/' || p[2] == '\0')
1998                                  && (p == fn || p[-1] == '/')) {
1999                                         rprintf(FERROR,
2000                                             "found \"..\" dir in relative path: %s\n",
2001                                             fn);
2002                                         exit_cleanup(RERR_SYNTAX);
2003                                 }
2004                         }
2005                 }
2006
2007                 if (!*fn) {
2008                         len = 1;
2009                         fn = ".";
2010                         name_type = DOTDIR_NAME;
2011                 }
2012
2013                 dirlen = dir ? strlen(dir) : 0;
2014                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2015                         if (!change_pathname(NULL, dir, -dirlen))
2016                                 continue;
2017                         lastdir = pathname;
2018                         lastdir_len = pathname_len;
2019                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2020                         continue;
2021
2022                 if (fn != fbuf)
2023                         memmove(fbuf, fn, len + 1);
2024
2025                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2026                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2027                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2028                         io_error |= IOERR_GENERAL;
2029                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2030                                 full_fname(fbuf));
2031                         continue;
2032                 }
2033
2034                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2035                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2036                         continue;
2037                 }
2038
2039                 if (inc_recurse && relative_paths && *fbuf) {
2040                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2041                                 if (p - fbuf == 1 && *fbuf == '.') {
2042                                         if ((fn = strchr(p+1, '/')) != NULL)
2043                                                 p = fn;
2044                                 } else
2045                                         fn = p;
2046                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2047                                 if (fn == p)
2048                                         continue;
2049                         }
2050                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2051                         /* Send the implied directories at the start of the
2052                          * source spec, so we get their permissions right. */
2053                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2054                 }
2055
2056                 if (one_file_system)
2057                         filesystem_dev = st.st_dev;
2058
2059                 arg_flags = name_type == DOTDIR_NAME ? FLAG_DOTDIR_NAME : 0;
2060
2061                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2062                         struct file_struct *file;
2063                         arg_flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
2064                         file = send_file_name(f, flist, fbuf, &st,
2065                                               arg_flags | flags, ALL_FILTERS);
2066                         if (!file)
2067                                 continue;
2068                         if (inc_recurse) {
2069                                 if (name_type == DOTDIR_NAME) {
2070                                         if (send_dir_depth < 0) {
2071                                                 send_dir_depth = 0;
2072                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2073                                         }
2074                                         send_directory(f, flist, fbuf, len, flags);
2075                                 }
2076                         } else
2077                                 send_if_directory(f, flist, file, fbuf, len, flags);
2078                 } else
2079                         send_file_name(f, flist, fbuf, &st, arg_flags | flags, ALL_FILTERS);
2080         }
2081
2082         gettimeofday(&end_tv, NULL);
2083         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2084                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2085         if (stats.flist_buildtime == 0)
2086                 stats.flist_buildtime = 1;
2087         start_tv = end_tv;
2088
2089         write_byte(f, 0); /* Indicate end of file list */
2090
2091 #ifdef SUPPORT_HARD_LINKS
2092         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2093                 idev_destroy();
2094 #endif
2095
2096         if (show_filelist_p())
2097                 finish_filelist_progress(flist);
2098
2099         gettimeofday(&end_tv, NULL);
2100         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2101                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2102
2103         /* When converting names, both sides keep an unsorted file-list array
2104          * because the names will differ on the sending and receiving sides
2105          * (both sides will use the unsorted index number for each item). */
2106
2107         /* Sort the list without removing any duplicates.  This allows the
2108          * receiving side to ask for whatever name it kept.  For incremental
2109          * recursion mode, the sender marks duplicate dirs so that it can
2110          * send them together in a single file-list. */
2111         if (need_unsorted_flist) {
2112                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2113                         out_of_memory("send_file_list");
2114                 memcpy(flist->sorted, flist->files,
2115                        flist->used * sizeof (struct file_struct*));
2116         } else
2117                 flist->sorted = flist->files;
2118         flist_sort_and_clean(flist, 0);
2119         file_total += flist->used;
2120
2121         if (numeric_ids <= 0 && !inc_recurse)
2122                 send_id_list(f);
2123
2124         /* send the io_error flag */
2125         if (protocol_version < 30)
2126                 write_int(f, ignore_errors ? 0 : io_error);
2127         else if (io_error && !ignore_errors)
2128                 send_msg_int(MSG_IO_ERROR, io_error);
2129
2130         if (disable_buffering)
2131                 io_end_buffering_out();
2132
2133         stats.flist_size = stats.total_written - start_write;
2134         stats.num_files = flist->used;
2135
2136         if (verbose > 3)
2137                 output_flist(flist);
2138
2139         if (verbose > 2)
2140                 rprintf(FINFO, "send_file_list done\n");
2141
2142         if (inc_recurse) {
2143                 send_dir_depth = 1;
2144                 add_dirs_to_tree(-1, flist, dir_count);
2145                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2146                         flist->parent_ndx = -1;
2147                 flist_done_allocating(flist);
2148                 if (send_dir_ndx < 0) {
2149                         write_ndx(f, NDX_FLIST_EOF);
2150                         flist_eof = 1;
2151                 }
2152                 else if (file_total == 1) {
2153                         /* If we're creating incremental file-lists and there
2154                          * was just 1 item in the first file-list, send 1 more
2155                          * file-list to check if this is a 1-file xfer. */
2156                         send_extra_file_list(f, 1);
2157                 }
2158         }
2159
2160         return flist;
2161 }
2162
2163 struct file_list *recv_file_list(int f)
2164 {
2165         struct file_list *flist;
2166         int dstart, flags;
2167         int64 start_read;
2168
2169         if (!first_flist)
2170                 rprintf(FLOG, "receiving file list\n");
2171         if (show_filelist_p())
2172                 start_filelist_progress("receiving file list");
2173         else if (inc_recurse && verbose && !am_server && !first_flist)
2174                 rprintf(FCLIENT, "receiving incremental file list\n");
2175
2176         start_read = stats.total_read;
2177
2178 #ifdef SUPPORT_HARD_LINKS
2179         if (preserve_hard_links && !first_flist)
2180                 init_hard_links();
2181 #endif
2182
2183         flist = flist_new(0, "recv_file_list");
2184
2185         if (inc_recurse) {
2186                 if (flist->ndx_start == 1)
2187                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2188                 dstart = dir_flist->used;
2189         } else {
2190                 dir_flist = flist;
2191                 dstart = 0;
2192         }
2193
2194         while ((flags = read_byte(f)) != 0) {
2195                 struct file_struct *file;
2196
2197                 flist_expand(flist, 1);
2198
2199                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2200                         flags |= read_byte(f) << 8;
2201                 file = recv_file_entry(flist, flags, f);
2202
2203                 if (inc_recurse && S_ISDIR(file->mode)) {
2204                         flist_expand(dir_flist, 1);
2205                         dir_flist->files[dir_flist->used++] = file;
2206                 }
2207
2208                 flist->files[flist->used++] = file;
2209
2210                 maybe_emit_filelist_progress(flist->used);
2211
2212                 if (verbose > 2) {
2213                         rprintf(FINFO, "recv_file_name(%s)\n",
2214                                 f_name(file, NULL));
2215                 }
2216         }
2217         file_total += flist->used;
2218
2219         if (verbose > 2)
2220                 rprintf(FINFO, "received %d names\n", flist->used);
2221
2222         if (show_filelist_p())
2223                 finish_filelist_progress(flist);
2224
2225         if (need_unsorted_flist) {
2226                 /* Create an extra array of index pointers that we can sort for
2227                  * the generator's use (for wading through the files in sorted
2228                  * order and for calling flist_find()).  We keep the "files"
2229                  * list unsorted for our exchange of index numbers with the
2230                  * other side (since their names may not sort the same). */
2231                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2232                         out_of_memory("recv_file_list");
2233                 memcpy(flist->sorted, flist->files,
2234                        flist->used * sizeof (struct file_struct*));
2235                 if (inc_recurse && dir_flist->used > dstart) {
2236                         static int dir_flist_malloced = 0;
2237                         if (dir_flist_malloced < dir_flist->malloced) {
2238                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2239                                                         struct file_struct *,
2240                                                         dir_flist->malloced);
2241                                 dir_flist_malloced = dir_flist->malloced;
2242                         }
2243                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2244                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2245                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2246                 }
2247         } else {
2248                 flist->sorted = flist->files;
2249                 if (inc_recurse && dir_flist->used > dstart) {
2250                         dir_flist->sorted = dir_flist->files;
2251                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2252                 }
2253         }
2254
2255         if (inc_recurse)
2256                 flist_done_allocating(flist);
2257         else if (f >= 0)
2258                 recv_id_list(f, flist);
2259
2260         flist_sort_and_clean(flist, relative_paths);
2261
2262         if (protocol_version < 30) {
2263                 /* Recv the io_error flag */
2264                 if (ignore_errors)
2265                         read_int(f);
2266                 else
2267                         io_error |= read_int(f);
2268         } else if (inc_recurse && flist->ndx_start == 1) {
2269                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2270                         flist->parent_ndx = -1;
2271         }
2272
2273         if (verbose > 3)
2274                 output_flist(flist);
2275
2276         if (verbose > 2)
2277                 rprintf(FINFO, "recv_file_list done\n");
2278
2279         stats.flist_size += stats.total_read - start_read;
2280         stats.num_files += flist->used;
2281
2282         return flist;
2283 }
2284
2285 /* This is only used once by the receiver if the very first file-list
2286  * has exactly one item in it. */
2287 void recv_additional_file_list(int f)
2288 {
2289         struct file_list *flist;
2290         int ndx = read_ndx(f);
2291         if (ndx == NDX_FLIST_EOF) {
2292                 flist_eof = 1;
2293                 change_local_filter_dir(NULL, 0, 0);
2294         } else {
2295                 ndx = NDX_FLIST_OFFSET - ndx;
2296                 if (ndx < 0 || ndx >= dir_flist->used) {
2297                         ndx = NDX_FLIST_OFFSET - ndx;
2298                         rprintf(FERROR,
2299                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2300                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2301                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2302                         exit_cleanup(RERR_PROTOCOL);
2303                 }
2304                 if (verbose > 3) {
2305                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2306                                 who_am_i(), ndx);
2307                 }
2308                 flist = recv_file_list(f);
2309                 flist->parent_ndx = ndx;
2310         }
2311 }
2312
2313 /* Search for an identically-named item in the file list.  Note that the
2314  * items must agree in their directory-ness, or no match is returned. */
2315 int flist_find(struct file_list *flist, struct file_struct *f)
2316 {
2317         int low = flist->low, high = flist->high;
2318         int diff, mid, mid_up;
2319
2320         while (low <= high) {
2321                 mid = (low + high) / 2;
2322                 if (F_IS_ACTIVE(flist->sorted[mid]))
2323                         mid_up = mid;
2324                 else {
2325                         /* Scan for the next non-empty entry using the cached
2326                          * distance values.  If the value isn't fully up-to-
2327                          * date, update it. */
2328                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2329                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2330                                 do {
2331                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2332                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2333                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2334                         }
2335                         if (mid_up > high) {
2336                                 /* If there's nothing left above us, set high to
2337                                  * a non-empty entry below us and continue. */
2338                                 high = mid - (int)flist->sorted[mid]->len32;
2339                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2340                                         do {
2341                                             high -= (int)flist->sorted[high]->len32;
2342                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2343                                         flist->sorted[mid]->len32 = mid - high;
2344                                 }
2345                                 continue;
2346                         }
2347                 }
2348                 diff = f_name_cmp(flist->sorted[mid_up], f);
2349                 if (diff == 0) {
2350                         if (protocol_version < 29
2351                             && S_ISDIR(flist->sorted[mid_up]->mode)
2352                             != S_ISDIR(f->mode))
2353                                 return -1;
2354                         return mid_up;
2355                 }
2356                 if (diff < 0)
2357                         low = mid_up + 1;
2358                 else
2359                         high = mid - 1;
2360         }
2361         return -1;
2362 }
2363
2364 /*
2365  * Free up any resources a file_struct has allocated
2366  * and clear the file.
2367  */
2368 void clear_file(struct file_struct *file)
2369 {
2370         /* The +1 zeros out the first char of the basename. */
2371         memset(file, 0, FILE_STRUCT_LEN + 1);
2372         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2373          * entry.  Likewise for len32 in the opposite direction.  We assume
2374          * that we're alone for now since flist_find() will adjust the counts
2375          * it runs into that aren't up-to-date. */
2376         file->len32 = F_DEPTH(file) = 1;
2377 }
2378
2379 /* Allocate a new file list. */
2380 struct file_list *flist_new(int flags, char *msg)
2381 {
2382         struct file_list *flist;
2383
2384         if (!(flist = new0(struct file_list)))
2385                 out_of_memory(msg);
2386
2387         if (flags & FLIST_TEMP) {
2388                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2389                                                 out_of_memory, POOL_INTERN)))
2390                         out_of_memory(msg);
2391         } else {
2392                 /* This is a doubly linked list with prev looping back to
2393                  * the end of the list, but the last next pointer is NULL. */
2394                 if (!first_flist) {
2395                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2396                                                 out_of_memory, POOL_INTERN);
2397                         if (!flist->file_pool)
2398                                 out_of_memory(msg);
2399
2400                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2401
2402                         first_flist = cur_flist = flist->prev = flist;
2403                 } else {
2404                         struct file_list *prev = first_flist->prev;
2405
2406                         flist->file_pool = first_flist->file_pool;
2407
2408                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2409                         flist->flist_num = prev->flist_num + 1;
2410
2411                         flist->prev = prev;
2412                         prev->next = first_flist->prev = flist;
2413                 }
2414                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2415                 flist_cnt++;
2416         }
2417
2418         return flist;
2419 }
2420
2421 /* Free up all elements in a flist. */
2422 void flist_free(struct file_list *flist)
2423 {
2424         if (!flist->prev) {
2425                 /* Was FLIST_TEMP dir-list. */
2426         } else if (flist == flist->prev) {
2427                 first_flist = cur_flist = NULL;
2428                 file_total = 0;
2429                 flist_cnt = 0;
2430         } else {
2431                 if (flist == cur_flist)
2432                         cur_flist = flist->next;
2433                 if (flist == first_flist)
2434                         first_flist = first_flist->next;
2435                 else {
2436                         flist->prev->next = flist->next;
2437                         if (!flist->next)
2438                                 flist->next = first_flist;
2439                 }
2440                 flist->next->prev = flist->prev;
2441                 file_total -= flist->used;
2442                 flist_cnt--;
2443         }
2444
2445         if (!flist->prev || !flist_cnt)
2446                 pool_destroy(flist->file_pool);
2447         else
2448                 pool_free_old(flist->file_pool, flist->pool_boundary);
2449
2450         if (flist->sorted && flist->sorted != flist->files)
2451                 free(flist->sorted);
2452         free(flist->files);
2453         free(flist);
2454 }
2455
2456 /* This routine ensures we don't have any duplicate names in our file list.
2457  * duplicate names can cause corruption because of the pipelining. */
2458 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2459 {
2460         char fbuf[MAXPATHLEN];
2461         int i, prev_i;
2462
2463         if (!flist)
2464                 return;
2465         if (flist->used == 0) {
2466                 flist->high = -1;
2467                 flist->low = 0;
2468                 return;
2469         }
2470
2471         fsort(flist->sorted, flist->used);
2472
2473         if (!am_sender || inc_recurse) {
2474                 for (i = prev_i = 0; i < flist->used; i++) {
2475                         if (F_IS_ACTIVE(flist->sorted[i])) {
2476                                 prev_i = i;
2477                                 break;
2478                         }
2479                 }
2480                 flist->low = prev_i;
2481         } else {
2482                 i = prev_i = flist->used - 1;
2483                 flist->low = 0;
2484         }
2485
2486         while (++i < flist->used) {
2487                 int j;
2488                 struct file_struct *file = flist->sorted[i];
2489
2490                 if (!F_IS_ACTIVE(file))
2491                         continue;
2492                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2493                         j = prev_i;
2494                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2495                         int save_mode = file->mode;
2496                         /* Make sure that this directory doesn't duplicate a
2497                          * non-directory earlier in the list. */
2498                         flist->high = prev_i;
2499                         file->mode = S_IFREG;
2500                         j = flist_find(flist, file);
2501                         file->mode = save_mode;
2502                 } else
2503                         j = -1;
2504                 if (j >= 0) {
2505                         int keep, drop;
2506                         /* If one is a dir and the other is not, we want to
2507                          * keep the dir because it might have contents in the
2508                          * list.  Otherwise keep the first one. */
2509                         if (S_ISDIR(file->mode)) {
2510                                 struct file_struct *fp = flist->sorted[j];
2511                                 if (!S_ISDIR(fp->mode))
2512                                         keep = i, drop = j;
2513                                 else {
2514                                         if (am_sender)
2515                                                 file->flags |= FLAG_DUPLICATE;
2516                                         else { /* Make sure we merge our vital flags. */
2517                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2518                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2519                                         }
2520                                         keep = j, drop = i;
2521                                 }
2522                         } else
2523                                 keep = j, drop = i;
2524
2525                         if (!am_sender) {
2526                                 if (verbose > 1) {
2527                                         rprintf(FINFO,
2528                                             "removing duplicate name %s from file list (%d)\n",
2529                                             f_name(file, fbuf), drop + flist->ndx_start);
2530                                 }
2531                                 clear_file(flist->sorted[drop]);
2532                         }
2533
2534                         if (keep == i) {
2535                                 if (flist->low == drop) {
2536                                         for (j = drop + 1;
2537                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2538                                              j++) {}
2539                                         flist->low = j;
2540                                 }
2541                                 prev_i = i;
2542                         }
2543                 } else
2544                         prev_i = i;
2545         }
2546         flist->high = prev_i;
2547
2548         if (strip_root) {
2549                 /* We need to strip off the leading slashes for relative
2550                  * paths, but this must be done _after_ the sorting phase. */
2551                 for (i = flist->low; i <= flist->high; i++) {
2552                         struct file_struct *file = flist->sorted[i];
2553
2554                         if (!file->dirname)
2555                                 continue;
2556                         while (*file->dirname == '/')
2557                                 file->dirname++;
2558                         if (!*file->dirname)
2559                                 file->dirname = NULL;
2560                 }
2561         }
2562
2563         if (prune_empty_dirs && !am_sender) {
2564                 int j, prev_depth = 0;
2565
2566                 prev_i = 0; /* It's OK that this isn't really true. */
2567
2568                 for (i = flist->low; i <= flist->high; i++) {
2569                         struct file_struct *fp, *file = flist->sorted[i];
2570
2571                         /* This temporarily abuses the F_DEPTH() value for a
2572                          * directory that is in a chain that might get pruned.
2573                          * We restore the old value if it gets a reprieve. */
2574                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2575                                 /* Dump empty dirs when coming back down. */
2576                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2577                                         fp = flist->sorted[prev_i];
2578                                         if (F_DEPTH(fp) >= 0)
2579                                                 break;
2580                                         prev_i = -F_DEPTH(fp)-1;
2581                                         clear_file(fp);
2582                                 }
2583                                 prev_depth = F_DEPTH(file);
2584                                 if (is_excluded(f_name(file, fbuf), 1,
2585                                                        ALL_FILTERS)) {
2586                                         /* Keep dirs through this dir. */
2587                                         for (j = prev_depth-1; ; j--) {
2588                                                 fp = flist->sorted[prev_i];
2589                                                 if (F_DEPTH(fp) >= 0)
2590                                                         break;
2591                                                 prev_i = -F_DEPTH(fp)-1;
2592                                                 F_DEPTH(fp) = j;
2593                                         }
2594                                 } else
2595                                         F_DEPTH(file) = -prev_i-1;
2596                                 prev_i = i;
2597                         } else {
2598                                 /* Keep dirs through this non-dir. */
2599                                 for (j = prev_depth; ; j--) {
2600                                         fp = flist->sorted[prev_i];
2601                                         if (F_DEPTH(fp) >= 0)
2602                                                 break;
2603                                         prev_i = -F_DEPTH(fp)-1;
2604                                         F_DEPTH(fp) = j;
2605                                 }
2606                         }
2607                 }
2608                 /* Dump all remaining empty dirs. */
2609                 while (1) {
2610                         struct file_struct *fp = flist->sorted[prev_i];
2611                         if (F_DEPTH(fp) >= 0)
2612                                 break;
2613                         prev_i = -F_DEPTH(fp)-1;
2614                         clear_file(fp);
2615                 }
2616
2617                 for (i = flist->low; i <= flist->high; i++) {
2618                         if (F_IS_ACTIVE(flist->sorted[i]))
2619                                 break;
2620                 }
2621                 flist->low = i;
2622                 for (i = flist->high; i >= flist->low; i--) {
2623                         if (F_IS_ACTIVE(flist->sorted[i]))
2624                                 break;
2625                 }
2626                 flist->high = i;
2627         }
2628 }
2629
2630 static void output_flist(struct file_list *flist)
2631 {
2632         char uidbuf[16], gidbuf[16], depthbuf[16];
2633         struct file_struct *file;
2634         const char *root, *dir, *slash, *name, *trail;
2635         const char *who = who_am_i();
2636         int i;
2637
2638         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2639                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2640         for (i = 0; i < flist->used; i++) {
2641                 file = flist->files[i];
2642                 if ((am_root || am_sender) && uid_ndx) {
2643                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2644                                  F_OWNER(file));
2645                 } else
2646                         *uidbuf = '\0';
2647                 if (gid_ndx) {
2648                         static char parens[] = "(\0)\0\0\0";
2649                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2650                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2651                                  pp, F_GROUP(file), pp + 2);
2652                 } else
2653                         *gidbuf = '\0';
2654                 if (!am_sender)
2655                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2656                 if (F_IS_ACTIVE(file)) {
2657                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2658                         if ((dir = file->dirname) == NULL)
2659                                 dir = slash = "";
2660                         else
2661                                 slash = "/";
2662                         name = file->basename;
2663                         trail = S_ISDIR(file->mode) ? "/" : "";
2664                 } else
2665                         root = dir = slash = name = trail = "";
2666                 rprintf(FINFO,
2667                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2668                         who, i + flist->ndx_start,
2669                         root, dir, slash, name, trail,
2670                         (int)file->mode, (double)F_LENGTH(file),
2671                         uidbuf, gidbuf, file->flags);
2672         }
2673 }
2674
2675 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2676 enum fnc_type { t_PATH, t_ITEM };
2677
2678 static int found_prefix;
2679
2680 /* Compare the names of two file_struct entities, similar to how strcmp()
2681  * would do if it were operating on the joined strings.
2682  *
2683  * Some differences beginning with protocol_version 29: (1) directory names
2684  * are compared with an assumed trailing slash so that they compare in a
2685  * way that would cause them to sort immediately prior to any content they
2686  * may have; (2) a directory of any name compares after a non-directory of
2687  * any name at the same depth; (3) a directory with name "." compares prior
2688  * to anything else.  These changes mean that a directory and a non-dir
2689  * with the same name will not compare as equal (protocol_version >= 29).
2690  *
2691  * The dirname component can be an empty string, but the basename component
2692  * cannot (and never is in the current codebase).  The basename component
2693  * may be NULL (for a removed item), in which case it is considered to be
2694  * after any existing item. */
2695 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2696 {
2697         int dif;
2698         const uchar *c1, *c2;
2699         enum fnc_state state1, state2;
2700         enum fnc_type type1, type2;
2701         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2702
2703         if (!f1 || !F_IS_ACTIVE(f1)) {
2704                 if (!f2 || !F_IS_ACTIVE(f2))
2705                         return 0;
2706                 return -1;
2707         }
2708         if (!f2 || !F_IS_ACTIVE(f2))
2709                 return 1;
2710
2711         c1 = (uchar*)f1->dirname;
2712         c2 = (uchar*)f2->dirname;
2713         if (c1 == c2)
2714                 c1 = c2 = NULL;
2715         if (!c1) {
2716                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2717                 c1 = (const uchar*)f1->basename;
2718                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2719                         type1 = t_ITEM;
2720                         state1 = s_TRAILING;
2721                         c1 = (uchar*)"";
2722                 } else
2723                         state1 = s_BASE;
2724         } else {
2725                 type1 = t_path;
2726                 state1 = s_DIR;
2727         }
2728         if (!c2) {
2729                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2730                 c2 = (const uchar*)f2->basename;
2731                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2732                         type2 = t_ITEM;
2733                         state2 = s_TRAILING;
2734                         c2 = (uchar*)"";
2735                 } else
2736                         state2 = s_BASE;
2737         } else {
2738                 type2 = t_path;
2739                 state2 = s_DIR;
2740         }
2741
2742         if (type1 != type2)
2743                 return type1 == t_PATH ? 1 : -1;
2744
2745         do {
2746                 if (!*c1) {
2747                         switch (state1) {
2748                         case s_DIR:
2749                                 state1 = s_SLASH;
2750                                 c1 = (uchar*)"/";
2751                                 break;
2752                         case s_SLASH:
2753                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2754                                 c1 = (const uchar*)f1->basename;
2755                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2756                                         type1 = t_ITEM;
2757                                         state1 = s_TRAILING;
2758                                         c1 = (uchar*)"";
2759                                 } else
2760                                         state1 = s_BASE;
2761                                 break;
2762                         case s_BASE:
2763                                 state1 = s_TRAILING;
2764                                 if (type1 == t_PATH) {
2765                                         c1 = (uchar*)"/";
2766                                         break;
2767                                 }
2768                                 /* FALL THROUGH */
2769                         case s_TRAILING:
2770                                 type1 = t_ITEM;
2771                                 break;
2772                         }
2773                         if (*c2 && type1 != type2)
2774                                 return type1 == t_PATH ? 1 : -1;
2775                 }
2776                 if (!*c2) {
2777                         switch (state2) {
2778                         case s_DIR:
2779                                 state2 = s_SLASH;
2780                                 c2 = (uchar*)"/";
2781                                 break;
2782                         case s_SLASH:
2783                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2784                                 c2 = (const uchar*)f2->basename;
2785                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2786                                         type2 = t_ITEM;
2787                                         state2 = s_TRAILING;
2788                                         c2 = (uchar*)"";
2789                                 } else
2790                                         state2 = s_BASE;
2791                                 break;
2792                         case s_BASE:
2793                                 state2 = s_TRAILING;
2794                                 if (type2 == t_PATH) {
2795                                         c2 = (uchar*)"/";
2796                                         break;
2797                                 }
2798                                 /* FALL THROUGH */
2799                         case s_TRAILING:
2800                                 found_prefix = 1;
2801                                 if (!*c1)
2802                                         return 0;
2803                                 type2 = t_ITEM;
2804                                 break;
2805                         }
2806                         if (type1 != type2)
2807                                 return type1 == t_PATH ? 1 : -1;
2808                 }
2809         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2810
2811         return dif;
2812 }
2813
2814 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2815  * not match if f2's basename is not an exact match of a path element in f1.
2816  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2817 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2818 {
2819         found_prefix = 0;
2820         f_name_cmp(f1, f2);
2821         return found_prefix;
2822 }
2823
2824 char *f_name_buf(void)
2825 {
2826         static char names[5][MAXPATHLEN];
2827         static unsigned int n;
2828
2829         n = (n + 1) % (sizeof names / sizeof names[0]);
2830
2831         return names[n];
2832 }
2833
2834 /* Return a copy of the full filename of a flist entry, using the indicated
2835  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2836  * done because we checked the size when creating the file_struct entry.
2837  */
2838 char *f_name(const struct file_struct *f, char *fbuf)
2839 {
2840         if (!f || !F_IS_ACTIVE(f))
2841                 return NULL;
2842
2843         if (!fbuf)
2844                 fbuf = f_name_buf();
2845
2846         if (f->dirname) {
2847                 int len = strlen(f->dirname);
2848                 memcpy(fbuf, f->dirname, len);
2849                 fbuf[len] = '/';
2850                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2851         } else
2852                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2853
2854         return fbuf;
2855 }
2856
2857 /* Do a non-recursive scan of the named directory, possibly ignoring all
2858  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2859  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2860  * buffer (the functions we call will append names onto the end, but the old
2861  * dir value will be restored on exit). */
2862 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2863 {
2864         struct file_list *dirlist;
2865         char dirbuf[MAXPATHLEN];
2866         int save_recurse = recurse;
2867         int save_xfer_dirs = xfer_dirs;
2868         int save_prune_empty_dirs = prune_empty_dirs;
2869
2870         if (dlen < 0) {
2871                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2872                 if (dlen >= MAXPATHLEN)
2873                         return NULL;
2874                 dirname = dirbuf;
2875         }
2876
2877         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2878
2879         recurse = 0;
2880         xfer_dirs = 1;
2881         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2882         xfer_dirs = save_xfer_dirs;
2883         recurse = save_recurse;
2884         if (do_progress)
2885                 flist_count_offset += dirlist->used;
2886
2887         prune_empty_dirs = 0;
2888         dirlist->sorted = dirlist->files;
2889         flist_sort_and_clean(dirlist, 0);
2890         prune_empty_dirs = save_prune_empty_dirs;
2891
2892         if (verbose > 3)
2893                 output_flist(dirlist);
2894
2895         return dirlist;
2896 }