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) 2002-2009 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "ifuncs.h"
  25 #include "rounding.h"
  26 #include "io.h"
  27
  28 extern int verbose;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int recurse;
  41 extern int use_qsort;
  42 extern int xfer_dirs;
  43 extern int filesfrom_fd;
  44 extern int one_file_system;
  45 extern int copy_dirlinks;
  46 extern int keep_dirlinks;
  47 extern int preserve_uid;
  48 extern int preserve_gid;
  49 extern int preserve_acls;
  50 extern int preserve_xattrs;
  51 extern int preserve_links;
  52 extern int preserve_hard_links;
  53 extern int preserve_devices;
  54 extern int preserve_specials;
  55 extern int uid_ndx;
  56 extern int gid_ndx;
  57 extern int eol_nulls;
  58 extern int relative_paths;
  59 extern int implied_dirs;
  60 extern int file_extra_cnt;
  61 extern int ignore_perishable;
  62 extern int non_perishable_cnt;
  63 extern int prune_empty_dirs;
  64 extern int copy_links;
  65 extern int copy_unsafe_links;
  66 extern int protocol_version;
  67 extern int sanitize_paths;
  68 extern int munge_symlinks;
  69 extern int need_unsorted_flist;
  70 extern int sender_symlink_iconv;
  71 extern int unsort_ndx;
  72 extern struct stats stats;
  73 extern char *filesfrom_host;
  74
  75 extern char curr_dir[MAXPATHLEN];
  76
  77 extern struct chmod_mode_struct *chmod_modes;
  78
  79 extern struct filter_list_struct filter_list;
  80 extern struct filter_list_struct daemon_filter_list;
  81
  82 #ifdef ICONV_OPTION
  83 extern int filesfrom_convert;
  84 extern iconv_t ic_send, ic_recv;
  85 #endif
  86
  87 #define PTR_SIZE (sizeof (struct file_struct *))
  88
  89 int io_error;
  90 int checksum_len;
  91 dev_t filesystem_dev; /* used to implement -x */
  92
  93 struct file_list *cur_flist, *first_flist, *dir_flist;
  94 int send_dir_ndx = -1, send_dir_depth = -1;
  95 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  96 int file_total = 0; /* total of all active items over all file-lists */
  97 int flist_eof = 0; /* all the file-lists are now known */
  98
  99 #define NORMAL_NAME 0
 100 #define SLASH_ENDING_NAME 1
 101 #define DOTDIR_NAME 2
 102
 103 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 104  * internally, even if this platform does not allow files to have 64-bit inums.
 105  * The only exception is if we're on a platform with no 64-bit type at all.
 106  *
 107  * Because we use read_longint() to get these off the wire, if you transfer
 108  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 109  * machine with no 64-bit types then you will get an overflow error.
 110  *
 111  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 112  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 113  * be truncated.  But it's a kind of silly thing to do anyhow. */
 114
 115 /* The tmp_* vars are used as a cache area by make_file() to store data
 116  * that the sender doesn't need to remember in its file list.  The data
 117  * will survive just long enough to be used by send_file_entry(). */
 118 static dev_t tmp_rdev;
 119 #ifdef SUPPORT_HARD_LINKS
 120 static int64 tmp_dev, tmp_ino;
 121 #endif
 122 static char tmp_sum[MAX_DIGEST_LEN];
 123
 124 static char empty_sum[MAX_DIGEST_LEN];
 125 static int flist_count_offset; /* for --delete --progress */
 126 static int dir_count = 0;
 127
 128 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 129 static void output_flist(struct file_list *flist);
 130
 131 void init_flist(void)
 132 {
 133         if (verbose > 4) {
 134                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 135                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 136         }
 137         checksum_len = protocol_version < 21 ? 2
 138                      : protocol_version < 30 ? MD4_DIGEST_LEN
 139                      : MD5_DIGEST_LEN;
 140 }
 141
 142 static int show_filelist_p(void)
 143 {
 144         return verbose && xfer_dirs && !am_server && !inc_recurse;
 145 }
 146
 147 static void start_filelist_progress(char *kind)
 148 {
 149         rprintf(FCLIENT, "%s ... ", kind);
 150         if (verbose > 1 || do_progress)
 151                 rprintf(FCLIENT, "\n");
 152         rflush(FINFO);
 153 }
 154
 155 static void emit_filelist_progress(int count)
 156 {
 157         rprintf(FCLIENT, " %d files...\r", count);
 158 }
 159
 160 static void maybe_emit_filelist_progress(int count)
 161 {
 162         if (do_progress && show_filelist_p() && (count % 100) == 0)
 163                 emit_filelist_progress(count);
 164 }
 165
 166 static void finish_filelist_progress(const struct file_list *flist)
 167 {
 168         if (do_progress) {
 169                 /* This overwrites the progress line */
 170                 rprintf(FINFO, "%d file%sto consider\n",
 171                         flist->used, flist->used == 1 ? " " : "s ");
 172         } else
 173                 rprintf(FINFO, "done\n");
 174 }
 175
 176 void show_flist_stats(void)
 177 {
 178         /* Nothing yet */
 179 }
 180
 181 /* Stat either a symlink or its referent, depending on the settings of
 182  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 183  *
 184  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 185  * MAXPATHLEN chars) will be set to the symlink's target string.
 186  *
 187  * The stat structure pointed to by stp will contain information about the
 188  * link or the referent as appropriate, if they exist. */
 189 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 190 {
 191 #ifdef SUPPORT_LINKS
 192         if (link_stat(path, stp, copy_dirlinks) < 0)
 193                 return -1;
 194         if (S_ISLNK(stp->st_mode)) {
 195                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 196                 if (llen < 0)
 197                         return -1;
 198                 linkbuf[llen] = '\0';
 199                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 200                         if (verbose > 1) {
 201                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 202                                         path, linkbuf);
 203                         }
 204                         return x_stat(path, stp, NULL);
 205                 }
 206                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 207                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 208                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 209                                 llen - SYMLINK_PREFIX_LEN + 1);
 210                 }
 211         }
 212         return 0;
 213 #else
 214         return x_stat(path, stp, NULL);
 215 #endif
 216 }
 217
 218 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 219 {
 220 #ifdef SUPPORT_LINKS
 221         if (copy_links)
 222                 return x_stat(path, stp, NULL);
 223         if (x_lstat(path, stp, NULL) < 0)
 224                 return -1;
 225         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 226                 STRUCT_STAT st;
 227                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 228                         *stp = st;
 229         }
 230         return 0;
 231 #else
 232         return x_stat(path, stp, NULL);
 233 #endif
 234 }
 235
 236 static inline int is_daemon_excluded(const char *fname, int is_dir)
 237 {
 238         if (daemon_filter_list.head
 239          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 240                 errno = ENOENT;
 241                 return 1;
 242         }
 243         return 0;
 244 }
 245
 246 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 247 {
 248         if (daemon_filter_list.head) {
 249                 char *slash = path;
 250
 251                 while ((slash = strchr(slash+1, '/')) != NULL) {
 252                         int ret;
 253                         *slash = '\0';
 254                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 255                         *slash = '/';
 256                         if (ret < 0) {
 257                                 errno = ENOENT;
 258                                 return 1;
 259                         }
 260                 }
 261
 262                 if (!ignore_filename
 263                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 264                         errno = ENOENT;
 265                         return 1;
 266                 }
 267         }
 268
 269         return 0;
 270 }
 271
 272 /* This function is used to check if a file should be included/excluded
 273  * from the list of files based on its name and type etc.  The value of
 274  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 275 static int is_excluded(const char *fname, int is_dir, int filter_level)
 276 {
 277 #if 0 /* This currently never happens, so avoid a useless compare. */
 278         if (filter_level == NO_FILTERS)
 279                 return 0;
 280 #endif
 281         if (is_daemon_excluded(fname, is_dir))
 282                 return 1;
 283         if (filter_level != ALL_FILTERS)
 284                 return 0;
 285         if (filter_list.head
 286             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 287                 return 1;
 288         return 0;
 289 }
 290
 291 static void send_directory(int f, struct file_list *flist,
 292                            char *fbuf, int len, int flags);
 293
 294 static const char *pathname, *orig_dir;
 295 static int pathname_len;
 296
 297 /* Make sure flist can hold at least flist->used + extra entries. */
 298 static void flist_expand(struct file_list *flist, int extra)
 299 {
 300         struct file_struct **new_ptr;
 301
 302         if (flist->used + extra <= flist->malloced)
 303                 return;
 304
 305         if (flist->malloced < FLIST_START)
 306                 flist->malloced = FLIST_START;
 307         else if (flist->malloced >= FLIST_LINEAR)
 308                 flist->malloced += FLIST_LINEAR;
 309         else
 310                 flist->malloced *= 2;
 311
 312         /* In case count jumped or we are starting the list
 313          * with a known size just set it. */
 314         if (flist->malloced < flist->used + extra)
 315                 flist->malloced = flist->used + extra;
 316
 317         new_ptr = realloc_array(flist->files, struct file_struct *,
 318                                 flist->malloced);
 319
 320         if (verbose >= 2 && flist->malloced != FLIST_START) {
 321                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 322                     who_am_i(),
 323                     (double)sizeof flist->files[0] * flist->malloced,
 324                     (new_ptr == flist->files) ? " not" : "");
 325         }
 326
 327         flist->files = new_ptr;
 328
 329         if (!flist->files)
 330                 out_of_memory("flist_expand");
 331 }
 332
 333 static void flist_done_allocating(struct file_list *flist)
 334 {
 335         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 336         if (flist->pool_boundary == ptr)
 337                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 338         else
 339                 flist->pool_boundary = ptr;
 340 }
 341
 342 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 343  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 344  * with dir == NULL taken to be the starting directory, and dirlen < 0
 345  * indicating that strdup(dir) should be called and then the -dirlen length
 346  * value checked to ensure that it is not daemon-excluded. */
 347 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 348 {
 349         if (dirlen < 0) {
 350                 char *cpy = strdup(dir);
 351                 if (*cpy != '/')
 352                         change_dir(orig_dir, CD_SKIP_CHDIR);
 353                 if (path_is_daemon_excluded(cpy, 0))
 354                         goto chdir_error;
 355                 dir = cpy;
 356                 dirlen = -dirlen;
 357         } else {
 358                 if (file) {
 359                         if (pathname == F_PATHNAME(file))
 360                                 return 1;
 361                         dir = F_PATHNAME(file);
 362                         if (dir)
 363                                 dirlen = strlen(dir);
 364                 } else if (pathname == dir)
 365                         return 1;
 366                 if (dir && *dir != '/')
 367                         change_dir(orig_dir, CD_SKIP_CHDIR);
 368         }
 369
 370         pathname = dir;
 371         pathname_len = dirlen;
 372
 373         if (!dir)
 374                 dir = orig_dir;
 375
 376         if (!change_dir(dir, CD_NORMAL)) {
 377           chdir_error:
 378                 io_error |= IOERR_GENERAL;
 379                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
 380                 if (dir != orig_dir)
 381                         change_dir(orig_dir, CD_NORMAL);
 382                 pathname = NULL;
 383                 pathname_len = 0;
 384                 return 0;
 385         }
 386
 387         return 1;
 388 }
 389
 390 static void send_file_entry(int f, const char *fname, struct file_struct *file,
 391 #ifdef SUPPORT_LINKS
 392                             const char *symlink_name, int symlink_len,
 393 #endif
 394                             int ndx, int first_ndx)
 395 {
 396         static time_t modtime;
 397         static mode_t mode;
 398 #ifdef SUPPORT_HARD_LINKS
 399         static int64 dev;
 400 #endif
 401         static dev_t rdev;
 402         static uint32 rdev_major;
 403         static uid_t uid;
 404         static gid_t gid;
 405         static const char *user_name, *group_name;
 406         static char lastname[MAXPATHLEN];
 407         int first_hlink_ndx = -1;
 408         int l1, l2;
 409         int xflags;
 410
 411         /* Initialize starting value of xflags. */
 412         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 413                 dir_count++;
 414                 if (file->flags & FLAG_CONTENT_DIR)
 415                         xflags = file->flags & FLAG_TOP_DIR;
 416                 else if (file->flags & FLAG_IMPLIED_DIR)
 417                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 418                 else
 419                         xflags = XMIT_NO_CONTENT_DIR;
 420         } else
 421                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 422
 423         if (file->mode == mode)
 424                 xflags |= XMIT_SAME_MODE;
 425         else
 426                 mode = file->mode;
 427
 428         if (preserve_devices && IS_DEVICE(mode)) {
 429                 if (protocol_version < 28) {
 430                         if (tmp_rdev == rdev)
 431                                 xflags |= XMIT_SAME_RDEV_pre28;
 432                         else
 433                                 rdev = tmp_rdev;
 434                 } else {
 435                         rdev = tmp_rdev;
 436                         if ((uint32)major(rdev) == rdev_major)
 437                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 438                         else
 439                                 rdev_major = major(rdev);
 440                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 441                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 442                 }
 443         } else if (preserve_specials && IS_SPECIAL(mode)) {
 444                 /* Special files don't need an rdev number, so just make
 445                  * the historical transmission of the value efficient. */
 446                 if (protocol_version < 28)
 447                         xflags |= XMIT_SAME_RDEV_pre28;
 448                 else {
 449                         rdev = MAKEDEV(major(rdev), 0);
 450                         xflags |= XMIT_SAME_RDEV_MAJOR;
 451                         if (protocol_version < 30)
 452                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 453                 }
 454         } else if (protocol_version < 28)
 455                 rdev = MAKEDEV(0, 0);
 456         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 457                 xflags |= XMIT_SAME_UID;
 458         else {
 459                 uid = F_OWNER(file);
 460                 if (!numeric_ids) {
 461                         user_name = add_uid(uid);
 462                         if (inc_recurse && user_name)
 463                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 464                 }
 465         }
 466         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 467                 xflags |= XMIT_SAME_GID;
 468         else {
 469                 gid = F_GROUP(file);
 470                 if (!numeric_ids) {
 471                         group_name = add_gid(gid);
 472                         if (inc_recurse && group_name)
 473                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 474                 }
 475         }
 476         if (file->modtime == modtime)
 477                 xflags |= XMIT_SAME_TIME;
 478         else
 479                 modtime = file->modtime;
 480
 481 #ifdef SUPPORT_HARD_LINKS
 482         if (tmp_dev != 0) {
 483                 if (protocol_version >= 30) {
 484                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 485                         first_hlink_ndx = (int32)(long)np->data - 1;
 486                         if (first_hlink_ndx < 0) {
 487                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 488                                 xflags |= XMIT_HLINK_FIRST;
 489                         }
 490                 } else {
 491                         if (tmp_dev == dev) {
 492                                 if (protocol_version >= 28)
 493                                         xflags |= XMIT_SAME_DEV_pre30;
 494                         } else
 495                                 dev = tmp_dev;
 496                 }
 497                 xflags |= XMIT_HLINKED;
 498         }
 499 #endif
 500
 501         for (l1 = 0;
 502             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 503             l1++) {}
 504         l2 = strlen(fname+l1);
 505
 506         if (l1 > 0)
 507                 xflags |= XMIT_SAME_NAME;
 508         if (l2 > 255)
 509                 xflags |= XMIT_LONG_NAME;
 510
 511         /* We must make sure we don't send a zero flag byte or the
 512          * other end will terminate the flist transfer.  Note that
 513          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 514          * it's harmless way to add a bit to the first flag byte. */
 515         if (protocol_version >= 28) {
 516                 if (!xflags && !S_ISDIR(mode))
 517                         xflags |= XMIT_TOP_DIR;
 518                 if ((xflags & 0xFF00) || !xflags) {
 519                         xflags |= XMIT_EXTENDED_FLAGS;
 520                         write_shortint(f, xflags);
 521                 } else
 522                         write_byte(f, xflags);
 523         } else {
 524                 if (!(xflags & 0xFF))
 525                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 526                 write_byte(f, xflags);
 527         }
 528         if (xflags & XMIT_SAME_NAME)
 529                 write_byte(f, l1);
 530         if (xflags & XMIT_LONG_NAME)
 531                 write_varint30(f, l2);
 532         else
 533                 write_byte(f, l2);
 534         write_buf(f, fname + l1, l2);
 535
 536         if (first_hlink_ndx >= 0) {
 537                 write_varint(f, first_hlink_ndx);
 538                 if (first_hlink_ndx >= first_ndx)
 539                         goto the_end;
 540         }
 541
 542         write_varlong30(f, F_LENGTH(file), 3);
 543         if (!(xflags & XMIT_SAME_TIME)) {
 544                 if (protocol_version >= 30)
 545                         write_varlong(f, modtime, 4);
 546                 else
 547                         write_int(f, modtime);
 548         }
 549         if (!(xflags & XMIT_SAME_MODE))
 550                 write_int(f, to_wire_mode(mode));
 551         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 552                 if (protocol_version < 30)
 553                         write_int(f, uid);
 554                 else {
 555                         write_varint(f, uid);
 556                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 557                                 int len = strlen(user_name);
 558                                 write_byte(f, len);
 559                                 write_buf(f, user_name, len);
 560                         }
 561                 }
 562         }
 563         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 564                 if (protocol_version < 30)
 565                         write_int(f, gid);
 566                 else {
 567                         write_varint(f, gid);
 568                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 569                                 int len = strlen(group_name);
 570                                 write_byte(f, len);
 571                                 write_buf(f, group_name, len);
 572                         }
 573                 }
 574         }
 575         if ((preserve_devices && IS_DEVICE(mode))
 576          || (preserve_specials && IS_SPECIAL(mode))) {
 577                 if (protocol_version < 28) {
 578                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 579                                 write_int(f, (int)rdev);
 580                 } else {
 581                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 582                                 write_varint30(f, major(rdev));
 583                         if (protocol_version >= 30)
 584                                 write_varint(f, minor(rdev));
 585                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 586                                 write_byte(f, minor(rdev));
 587                         else
 588                                 write_int(f, minor(rdev));
 589                 }
 590         }
 591
 592 #ifdef SUPPORT_LINKS
 593         if (symlink_len) {
 594                 write_varint30(f, symlink_len);
 595                 write_buf(f, symlink_name, symlink_len);
 596         }
 597 #endif
 598
 599 #ifdef SUPPORT_HARD_LINKS
 600         if (tmp_dev != 0 && protocol_version < 30) {
 601                 if (protocol_version < 26) {
 602                         /* 32-bit dev_t and ino_t */
 603                         write_int(f, (int32)dev);
 604                         write_int(f, (int32)tmp_ino);
 605                 } else {
 606                         /* 64-bit dev_t and ino_t */
 607                         if (!(xflags & XMIT_SAME_DEV_pre30))
 608                                 write_longint(f, dev);
 609                         write_longint(f, tmp_ino);
 610                 }
 611         }
 612 #endif
 613
 614         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 615                 const char *sum;
 616                 if (S_ISREG(mode))
 617                         sum = tmp_sum;
 618                 else {
 619                         /* Prior to 28, we sent a useless set of nulls. */
 620                         sum = empty_sum;
 621                 }
 622                 write_buf(f, sum, checksum_len);
 623         }
 624
 625   the_end:
 626         strlcpy(lastname, fname, MAXPATHLEN);
 627
 628         if (S_ISREG(mode) || S_ISLNK(mode))
 629                 stats.total_size += F_LENGTH(file);
 630 }
 631
 632 static struct file_struct *recv_file_entry(struct file_list *flist,
 633                                            int xflags, int f)
 634 {
 635         static int64 modtime;
 636         static mode_t mode;
 637 #ifdef SUPPORT_HARD_LINKS
 638         static int64 dev;
 639 #endif
 640         static dev_t rdev;
 641         static uint32 rdev_major;
 642         static uid_t uid;
 643         static gid_t gid;
 644         static uint16 gid_flags;
 645         static char lastname[MAXPATHLEN], *lastdir;
 646         static int lastdir_depth, lastdir_len = -1;
 647         static unsigned int del_hier_name_len = 0;
 648         static int in_del_hier = 0;
 649         char thisname[MAXPATHLEN];
 650         unsigned int l1 = 0, l2 = 0;
 651         int alloc_len, basename_len, linkname_len;
 652         int extra_len = file_extra_cnt * EXTRA_LEN;
 653         int first_hlink_ndx = -1;
 654         int64 file_length;
 655         const char *basename;
 656         struct file_struct *file;
 657         alloc_pool_t *pool;
 658         char *bp;
 659
 660         if (xflags & XMIT_SAME_NAME)
 661                 l1 = read_byte(f);
 662
 663         if (xflags & XMIT_LONG_NAME)
 664                 l2 = read_varint30(f);
 665         else
 666                 l2 = read_byte(f);
 667
 668         if (l2 >= MAXPATHLEN - l1) {
 669                 rprintf(FERROR,
 670                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 671                         xflags, l1, l2, lastname, who_am_i());
 672                 overflow_exit("recv_file_entry");
 673         }
 674
 675         strlcpy(thisname, lastname, l1 + 1);
 676         read_sbuf(f, &thisname[l1], l2);
 677         thisname[l1 + l2] = 0;
 678
 679         /* Abuse basename_len for a moment... */
 680         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 681
 682 #ifdef ICONV_OPTION
 683         if (ic_recv != (iconv_t)-1) {
 684                 xbuf outbuf, inbuf;
 685
 686                 INIT_CONST_XBUF(outbuf, thisname);
 687                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 688
 689                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 690                         io_error |= IOERR_GENERAL;
 691                         rprintf(FERROR_UTF8,
 692                             "[%s] cannot convert filename: %s (%s)\n",
 693                             who_am_i(), lastname, strerror(errno));
 694                         outbuf.len = 0;
 695                 }
 696                 thisname[outbuf.len] = '\0';
 697         }
 698 #endif
 699
 700         if (*thisname)
 701                 clean_fname(thisname, 0);
 702
 703         if (sanitize_paths)
 704                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 705
 706         if ((basename = strrchr(thisname, '/')) != NULL) {
 707                 int len = basename++ - thisname;
 708                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 709                         lastdir = new_array(char, len + 1);
 710                         memcpy(lastdir, thisname, len);
 711                         lastdir[len] = '\0';
 712                         lastdir_len = len;
 713                         lastdir_depth = count_dir_elements(lastdir);
 714                 }
 715         } else
 716                 basename = thisname;
 717         basename_len = strlen(basename) + 1; /* count the '\0' */
 718
 719 #ifdef SUPPORT_HARD_LINKS
 720         if (protocol_version >= 30
 721          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 722                 first_hlink_ndx = read_varint(f);
 723                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 724                         rprintf(FERROR,
 725                                 "hard-link reference out of range: %d (%d)\n",
 726                                 first_hlink_ndx, flist->ndx_start + flist->used);
 727                         exit_cleanup(RERR_PROTOCOL);
 728                 }
 729                 if (first_hlink_ndx >= flist->ndx_start) {
 730                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 731                         file_length = F_LENGTH(first);
 732                         modtime = first->modtime;
 733                         mode = first->mode;
 734                         if (preserve_uid)
 735                                 uid = F_OWNER(first);
 736                         if (preserve_gid)
 737                                 gid = F_GROUP(first);
 738                         if (preserve_devices && IS_DEVICE(mode)) {
 739                                 uint32 *devp = F_RDEV_P(first);
 740                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 741                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 742                         }
 743                         if (preserve_links && S_ISLNK(mode))
 744                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 745                         else
 746                                 linkname_len = 0;
 747                         goto create_object;
 748                 }
 749         }
 750 #endif
 751
 752         file_length = read_varlong30(f, 3);
 753         if (!(xflags & XMIT_SAME_TIME)) {
 754                 if (protocol_version >= 30) {
 755                         modtime = read_varlong(f, 4);
 756 #if SIZEOF_TIME_T < SIZEOF_INT64
 757                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 758                                 rprintf(FERROR_XFER,
 759                                     "Time value of %s truncated on receiver.\n",
 760                                     lastname);
 761                         }
 762 #endif
 763                 } else
 764                         modtime = read_int(f);
 765         }
 766         if (!(xflags & XMIT_SAME_MODE))
 767                 mode = from_wire_mode(read_int(f));
 768
 769         if (chmod_modes && !S_ISLNK(mode))
 770                 mode = tweak_mode(mode, chmod_modes);
 771
 772         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 773                 if (protocol_version < 30)
 774                         uid = (uid_t)read_int(f);
 775                 else {
 776                         uid = (uid_t)read_varint(f);
 777                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 778                                 uid = recv_user_name(f, uid);
 779                         else if (inc_recurse && am_root && !numeric_ids)
 780                                 uid = match_uid(uid);
 781                 }
 782         }
 783         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 784                 if (protocol_version < 30)
 785                         gid = (gid_t)read_int(f);
 786                 else {
 787                         gid = (gid_t)read_varint(f);
 788                         gid_flags = 0;
 789                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 790                                 gid = recv_group_name(f, gid, &gid_flags);
 791                         else if (inc_recurse && (!am_root || !numeric_ids))
 792                                 gid = match_gid(gid, &gid_flags);
 793                 }
 794         }
 795
 796         if ((preserve_devices && IS_DEVICE(mode))
 797          || (preserve_specials && IS_SPECIAL(mode))) {
 798                 if (protocol_version < 28) {
 799                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 800                                 rdev = (dev_t)read_int(f);
 801                 } else {
 802                         uint32 rdev_minor;
 803                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 804                                 rdev_major = read_varint30(f);
 805                         if (protocol_version >= 30)
 806                                 rdev_minor = read_varint(f);
 807                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 808                                 rdev_minor = read_byte(f);
 809                         else
 810                                 rdev_minor = read_int(f);
 811                         rdev = MAKEDEV(rdev_major, rdev_minor);
 812                 }
 813                 if (IS_DEVICE(mode))
 814                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 815                 file_length = 0;
 816         } else if (protocol_version < 28)
 817                 rdev = MAKEDEV(0, 0);
 818
 819 #ifdef SUPPORT_LINKS
 820         if (preserve_links && S_ISLNK(mode)) {
 821                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 822                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 823                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 824                                 linkname_len - 1);
 825                         overflow_exit("recv_file_entry");
 826                 }
 827 #ifdef ICONV_OPTION
 828                 /* We don't know how much extra room we need to convert
 829                  * the as-yet-unread symlink data, so let's hope that a
 830                  * double-size buffer is plenty. */
 831                 if (sender_symlink_iconv)
 832                         linkname_len *= 2;
 833 #endif
 834                 if (munge_symlinks)
 835                         linkname_len += SYMLINK_PREFIX_LEN;
 836         }
 837         else
 838 #endif
 839                 linkname_len = 0;
 840
 841 #ifdef SUPPORT_HARD_LINKS
 842   create_object:
 843         if (preserve_hard_links) {
 844                 if (protocol_version < 28 && S_ISREG(mode))
 845                         xflags |= XMIT_HLINKED;
 846                 if (xflags & XMIT_HLINKED)
 847                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 848         }
 849 #endif
 850
 851 #ifdef SUPPORT_ACLS
 852         /* Directories need an extra int32 for the default ACL. */
 853         if (preserve_acls && S_ISDIR(mode))
 854                 extra_len += EXTRA_LEN;
 855 #endif
 856
 857         if (always_checksum && S_ISREG(mode))
 858                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 859
 860 #if SIZEOF_INT64 >= 8
 861         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 862                 extra_len += EXTRA_LEN;
 863 #endif
 864         if (file_length < 0) {
 865                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 866                 exit_cleanup(RERR_UNSUPPORTED);
 867         }
 868
 869         if (inc_recurse && S_ISDIR(mode)) {
 870                 if (one_file_system) {
 871                         /* Room to save the dir's device for -x */
 872                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 873                 }
 874                 pool = dir_flist->file_pool;
 875         } else
 876                 pool = flist->file_pool;
 877
 878 #if EXTRA_ROUNDING > 0
 879         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 880                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 881 #endif
 882
 883         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 884                   + linkname_len;
 885         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 886
 887         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 888         bp += extra_len;
 889         file = (struct file_struct *)bp;
 890         bp += FILE_STRUCT_LEN;
 891
 892         memcpy(bp, basename, basename_len);
 893
 894 #ifdef SUPPORT_HARD_LINKS
 895         if (xflags & XMIT_HLINKED)
 896                 file->flags |= FLAG_HLINKED;
 897 #endif
 898         file->modtime = (time_t)modtime;
 899         file->len32 = (uint32)file_length;
 900 #if SIZEOF_INT64 >= 8
 901         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 902 #if SIZEOF_CAPITAL_OFF_T < 8
 903                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 904                 exit_cleanup(RERR_UNSUPPORTED);
 905 #else
 906                 file->flags |= FLAG_LENGTH64;
 907                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 908 #endif
 909         }
 910 #endif
 911         file->mode = mode;
 912         if (preserve_uid)
 913                 F_OWNER(file) = uid;
 914         if (preserve_gid) {
 915                 F_GROUP(file) = gid;
 916                 file->flags |= gid_flags;
 917         }
 918         if (unsort_ndx)
 919                 F_NDX(file) = flist->used + flist->ndx_start;
 920
 921         if (basename != thisname) {
 922                 file->dirname = lastdir;
 923                 F_DEPTH(file) = lastdir_depth + 1;
 924         } else
 925                 F_DEPTH(file) = 1;
 926
 927         if (S_ISDIR(mode)) {
 928                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 929                         F_DEPTH(file)--;
 930                 if (protocol_version >= 30) {
 931                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 932                                 if (xflags & XMIT_TOP_DIR)
 933                                         file->flags |= FLAG_TOP_DIR;
 934                                 file->flags |= FLAG_CONTENT_DIR;
 935                         } else if (xflags & XMIT_TOP_DIR)
 936                                 file->flags |= FLAG_IMPLIED_DIR;
 937                 } else if (xflags & XMIT_TOP_DIR) {
 938                         in_del_hier = recurse;
 939                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 940                         if (relative_paths && del_hier_name_len > 2
 941                             && lastname[del_hier_name_len-1] == '.'
 942                             && lastname[del_hier_name_len-2] == '/')
 943                                 del_hier_name_len -= 2;
 944                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 945                 } else if (in_del_hier) {
 946                         if (!relative_paths || !del_hier_name_len
 947                          || (l1 >= del_hier_name_len
 948                           && lastname[del_hier_name_len] == '/'))
 949                                 file->flags |= FLAG_CONTENT_DIR;
 950                         else
 951                                 in_del_hier = 0;
 952                 }
 953         }
 954
 955         if (preserve_devices && IS_DEVICE(mode)) {
 956                 uint32 *devp = F_RDEV_P(file);
 957                 DEV_MAJOR(devp) = major(rdev);
 958                 DEV_MINOR(devp) = minor(rdev);
 959         }
 960
 961 #ifdef SUPPORT_LINKS
 962         if (linkname_len) {
 963                 bp += basename_len;
 964                 if (first_hlink_ndx >= flist->ndx_start) {
 965                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 966                         memcpy(bp, F_SYMLINK(first), linkname_len);
 967                 } else {
 968                         if (munge_symlinks) {
 969                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 970                                 bp += SYMLINK_PREFIX_LEN;
 971                                 linkname_len -= SYMLINK_PREFIX_LEN;
 972                         }
 973 #ifdef ICONV_OPTION
 974                         if (sender_symlink_iconv) {
 975                                 xbuf outbuf, inbuf;
 976
 977                                 alloc_len = linkname_len;
 978                                 linkname_len /= 2;
 979
 980                                 /* Read the symlink data into the end of our double-sized
 981                                  * buffer and then convert it into the right spot. */
 982                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
 983                                           linkname_len - 1, (size_t)-1);
 984                                 read_sbuf(f, inbuf.buf, inbuf.len);
 985                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
 986
 987                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 988                                         io_error |= IOERR_GENERAL;
 989                                         rprintf(FERROR_XFER,
 990                                             "[%s] cannot convert symlink data for: %s (%s)\n",
 991                                             who_am_i(), full_fname(thisname), strerror(errno));
 992                                         bp = (char*)file->basename;
 993                                         *bp++ = '\0';
 994                                         outbuf.len = 0;
 995                                 }
 996                                 bp[outbuf.len] = '\0';
 997                         } else
 998 #endif
 999                                 read_sbuf(f, bp, linkname_len - 1);
1000                         if (sanitize_paths && !munge_symlinks && *bp)
1001                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1002                 }
1003         }
1004 #endif
1005
1006 #ifdef SUPPORT_HARD_LINKS
1007         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1008                 if (protocol_version >= 30) {
1009                         if (xflags & XMIT_HLINK_FIRST) {
1010                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1011                         } else
1012                                 F_HL_GNUM(file) = first_hlink_ndx;
1013                 } else {
1014                         static int32 cnt = 0;
1015                         struct ht_int64_node *np;
1016                         int64 ino;
1017                         int32 ndx;
1018                         if (protocol_version < 26) {
1019                                 dev = read_int(f);
1020                                 ino = read_int(f);
1021                         } else {
1022                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1023                                         dev = read_longint(f);
1024                                 ino = read_longint(f);
1025                         }
1026                         np = idev_find(dev, ino);
1027                         ndx = (int32)(long)np->data - 1;
1028                         if (ndx < 0) {
1029                                 ndx = cnt++;
1030                                 np->data = (void*)(long)cnt;
1031                         }
1032                         F_HL_GNUM(file) = ndx;
1033                 }
1034         }
1035 #endif
1036
1037         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1038                 if (S_ISREG(mode))
1039                         bp = F_SUM(file);
1040                 else {
1041                         /* Prior to 28, we get a useless set of nulls. */
1042                         bp = tmp_sum;
1043                 }
1044                 if (first_hlink_ndx >= flist->ndx_start) {
1045                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1046                         memcpy(bp, F_SUM(first), checksum_len);
1047                 } else
1048                         read_buf(f, bp, checksum_len);
1049         }
1050
1051 #ifdef SUPPORT_ACLS
1052         if (preserve_acls && !S_ISLNK(mode))
1053                 receive_acl(file, f);
1054 #endif
1055 #ifdef SUPPORT_XATTRS
1056         if (preserve_xattrs)
1057                 receive_xattr(file, f );
1058 #endif
1059
1060         if (S_ISREG(mode) || S_ISLNK(mode))
1061                 stats.total_size += file_length;
1062
1063         return file;
1064 }
1065
1066 /* Create a file_struct for a named file by reading its stat() information
1067  * and performing extensive checks against global options.
1068  *
1069  * Returns a pointer to the new file struct, or NULL if there was an error
1070  * or this file should be excluded.
1071  *
1072  * Note: Any error (here or in send_file_name) that results in the omission of
1073  * an existent source file from the file list should set
1074  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1075  * destination if --delete is on. */
1076 struct file_struct *make_file(const char *fname, struct file_list *flist,
1077                               STRUCT_STAT *stp, int flags, int filter_level)
1078 {
1079         static char *lastdir;
1080         static int lastdir_len = -1;
1081         struct file_struct *file;
1082         char thisname[MAXPATHLEN];
1083         char linkname[MAXPATHLEN];
1084         int alloc_len, basename_len, linkname_len;
1085         int extra_len = file_extra_cnt * EXTRA_LEN;
1086         const char *basename;
1087         alloc_pool_t *pool;
1088         STRUCT_STAT st;
1089         char *bp;
1090
1091         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1092                 io_error |= IOERR_GENERAL;
1093                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1094                 return NULL;
1095         }
1096         clean_fname(thisname, 0);
1097         if (sanitize_paths)
1098                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1099
1100         if (stp && S_ISDIR(stp->st_mode)) {
1101                 st = *stp; /* Needed for "symlink/." with --relative. */
1102                 *linkname = '\0'; /* make IBM code checker happy */
1103         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1104                 int save_errno = errno;
1105                 /* See if file is excluded before reporting an error. */
1106                 if (filter_level != NO_FILTERS
1107                  && (is_excluded(thisname, 0, filter_level)
1108                   || is_excluded(thisname, 1, filter_level))) {
1109                         if (ignore_perishable && save_errno != ENOENT)
1110                                 non_perishable_cnt++;
1111                         return NULL;
1112                 }
1113                 if (save_errno == ENOENT) {
1114 #ifdef SUPPORT_LINKS
1115                         /* When our options tell us to follow a symlink that
1116                          * points nowhere, tell the user about the symlink
1117                          * instead of giving a "vanished" message.  We only
1118                          * dereference a symlink if one of the --copy*links
1119                          * options was specified, so there's no need for the
1120                          * extra lstat() if one of these options isn't on. */
1121                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1122                          && x_lstat(thisname, &st, NULL) == 0
1123                          && S_ISLNK(st.st_mode)) {
1124                                 io_error |= IOERR_GENERAL;
1125                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1126                                         full_fname(thisname));
1127                         } else
1128 #endif
1129                         {
1130                                 enum logcode c = am_daemon && protocol_version < 28
1131                                                ? FERROR : FWARNING;
1132                                 io_error |= IOERR_VANISHED;
1133                                 rprintf(c, "file has vanished: %s\n",
1134                                         full_fname(thisname));
1135                         }
1136                 } else {
1137                         io_error |= IOERR_GENERAL;
1138                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1139                                 full_fname(thisname));
1140                 }
1141                 return NULL;
1142         }
1143
1144         if (filter_level == NO_FILTERS)
1145                 goto skip_filters;
1146
1147         if (S_ISDIR(st.st_mode)) {
1148                 if (!xfer_dirs) {
1149                         rprintf(FINFO, "skipping directory %s\n", thisname);
1150                         return NULL;
1151                 }
1152                 /* -x only affects dirs because we need to avoid recursing
1153                  * into a mount-point directory, not to avoid copying a
1154                  * symlinked file if -L (or similar) was specified. */
1155                 if (one_file_system && st.st_dev != filesystem_dev
1156                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1157                         if (one_file_system > 1) {
1158                                 if (verbose > 1) {
1159                                         rprintf(FINFO,
1160                                             "[%s] skipping mount-point dir %s\n",
1161                                             who_am_i(), thisname);
1162                                 }
1163                                 return NULL;
1164                         }
1165                         flags |= FLAG_MOUNT_DIR;
1166                         flags &= ~FLAG_CONTENT_DIR;
1167                 }
1168         } else
1169                 flags &= ~FLAG_CONTENT_DIR;
1170
1171         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1172                 if (ignore_perishable)
1173                         non_perishable_cnt++;
1174                 return NULL;
1175         }
1176
1177         if (lp_ignore_nonreadable(module_id)) {
1178 #ifdef SUPPORT_LINKS
1179                 if (!S_ISLNK(st.st_mode))
1180 #endif
1181                         if (access(thisname, R_OK) != 0)
1182                                 return NULL;
1183         }
1184
1185   skip_filters:
1186
1187         /* Only divert a directory in the main transfer. */
1188         if (flist) {
1189                 if (flist->prev && S_ISDIR(st.st_mode)
1190                  && flags & FLAG_DIVERT_DIRS) {
1191                         /* Room for parent/sibling/next-child info. */
1192                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1193                         if (relative_paths)
1194                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1195                         pool = dir_flist->file_pool;
1196                 } else
1197                         pool = flist->file_pool;
1198         } else {
1199 #ifdef SUPPORT_ACLS
1200                 /* Directories need an extra int32 for the default ACL. */
1201                 if (preserve_acls && S_ISDIR(st.st_mode))
1202                         extra_len += EXTRA_LEN;
1203 #endif
1204                 pool = NULL;
1205         }
1206
1207         if (verbose > 2) {
1208                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1209                         who_am_i(), thisname, filter_level);
1210         }
1211
1212         if ((basename = strrchr(thisname, '/')) != NULL) {
1213                 int len = basename++ - thisname;
1214                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1215                         lastdir = new_array(char, len + 1);
1216                         memcpy(lastdir, thisname, len);
1217                         lastdir[len] = '\0';
1218                         lastdir_len = len;
1219                 }
1220         } else
1221                 basename = thisname;
1222         basename_len = strlen(basename) + 1; /* count the '\0' */
1223
1224 #ifdef SUPPORT_LINKS
1225         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1226 #else
1227         linkname_len = 0;
1228 #endif
1229
1230 #if SIZEOF_CAPITAL_OFF_T >= 8
1231         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1232                 extra_len += EXTRA_LEN;
1233 #endif
1234
1235 #if EXTRA_ROUNDING > 0
1236         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1237                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1238 #endif
1239
1240         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1241                   + linkname_len;
1242         if (pool)
1243                 bp = pool_alloc(pool, alloc_len, "make_file");
1244         else {
1245                 if (!(bp = new_array(char, alloc_len)))
1246                         out_of_memory("make_file");
1247         }
1248
1249         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1250         bp += extra_len;
1251         file = (struct file_struct *)bp;
1252         bp += FILE_STRUCT_LEN;
1253
1254         memcpy(bp, basename, basename_len);
1255
1256 #ifdef SUPPORT_HARD_LINKS
1257         if (preserve_hard_links && flist && flist->prev) {
1258                 if (protocol_version >= 28
1259                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1260                  : S_ISREG(st.st_mode)) {
1261                         tmp_dev = (int64)st.st_dev + 1;
1262                         tmp_ino = (int64)st.st_ino;
1263                 } else
1264                         tmp_dev = 0;
1265         }
1266 #endif
1267
1268 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1269         if (IS_DEVICE(st.st_mode)) {
1270                 tmp_rdev = st.st_rdev;
1271                 st.st_size = 0;
1272         } else if (IS_SPECIAL(st.st_mode))
1273                 st.st_size = 0;
1274 #endif
1275
1276         file->flags = flags;
1277         file->modtime = st.st_mtime;
1278         file->len32 = (uint32)st.st_size;
1279 #if SIZEOF_CAPITAL_OFF_T >= 8
1280         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1281                 file->flags |= FLAG_LENGTH64;
1282                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1283         }
1284 #endif
1285         file->mode = st.st_mode;
1286         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1287                 F_OWNER(file) = st.st_uid;
1288         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1289                 F_GROUP(file) = st.st_gid;
1290
1291         if (basename != thisname)
1292                 file->dirname = lastdir;
1293
1294 #ifdef SUPPORT_LINKS
1295         if (linkname_len)
1296                 memcpy(bp + basename_len, linkname, linkname_len);
1297 #endif
1298
1299         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1300                 file_checksum(thisname, tmp_sum, st.st_size);
1301
1302         if (am_sender)
1303                 F_PATHNAME(file) = pathname;
1304         else if (!pool)
1305                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1306
1307         if (basename_len == 0+1) {
1308                 if (!pool)
1309                         unmake_file(file);
1310                 return NULL;
1311         }
1312
1313         if (unsort_ndx)
1314                 F_NDX(file) = dir_count;
1315
1316         return file;
1317 }
1318
1319 /* Only called for temporary file_struct entries created by make_file(). */
1320 void unmake_file(struct file_struct *file)
1321 {
1322         free(REQ_EXTRA(file, F_DEPTH(file)));
1323 }
1324
1325 static struct file_struct *send_file_name(int f, struct file_list *flist,
1326                                           const char *fname, STRUCT_STAT *stp,
1327                                           int flags, int filter_level)
1328 {
1329         struct file_struct *file;
1330
1331         file = make_file(fname, flist, stp, flags, filter_level);
1332         if (!file)
1333                 return NULL;
1334
1335         if (chmod_modes && !S_ISLNK(file->mode))
1336                 file->mode = tweak_mode(file->mode, chmod_modes);
1337
1338         if (f >= 0) {
1339                 char fbuf[MAXPATHLEN];
1340 #ifdef SUPPORT_LINKS
1341                 const char *symlink_name;
1342                 int symlink_len;
1343 #ifdef ICONV_OPTION
1344                 char symlink_buf[MAXPATHLEN];
1345 #endif
1346 #endif
1347 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1348                 stat_x sx;
1349 #endif
1350
1351 #ifdef SUPPORT_LINKS
1352                 if (preserve_links && S_ISLNK(file->mode)) {
1353                         symlink_name = F_SYMLINK(file);
1354                         symlink_len = strlen(symlink_name);
1355                         if (symlink_len == 0) {
1356                                 io_error |= IOERR_GENERAL;
1357                                 f_name(file, fbuf);
1358                                 rprintf(FERROR_XFER,
1359                                     "skipping symlink with 0-length value: %s\n",
1360                                     full_fname(fbuf));
1361                                 return NULL;
1362                         }
1363                 } else {
1364                         symlink_name = NULL;
1365                         symlink_len = 0;
1366                 }
1367 #endif
1368
1369 #ifdef ICONV_OPTION
1370                 if (ic_send != (iconv_t)-1) {
1371                         xbuf outbuf, inbuf;
1372
1373                         INIT_CONST_XBUF(outbuf, fbuf);
1374
1375                         if (file->dirname) {
1376                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1377                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1378                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1379                                         goto convert_error;
1380                                 outbuf.size += 2;
1381                                 fbuf[outbuf.len++] = '/';
1382                         }
1383
1384                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1385                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1386                           convert_error:
1387                                 io_error |= IOERR_GENERAL;
1388                                 rprintf(FERROR_XFER,
1389                                     "[%s] cannot convert filename: %s (%s)\n",
1390                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1391                                 return NULL;
1392                         }
1393                         fbuf[outbuf.len] = '\0';
1394
1395 #ifdef SUPPORT_LINKS
1396                         if (symlink_len && sender_symlink_iconv) {
1397                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1398                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1399                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1400                                         io_error |= IOERR_GENERAL;
1401                                         f_name(file, fbuf);
1402                                         rprintf(FERROR_XFER,
1403                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1404                                             who_am_i(), full_fname(fbuf), strerror(errno));
1405                                         return NULL;
1406                                 }
1407                                 symlink_buf[outbuf.len] = '\0';
1408
1409                                 symlink_name = symlink_buf;
1410                                 symlink_len = outbuf.len;
1411                         }
1412 #endif
1413                 } else
1414 #endif
1415                         f_name(file, fbuf);
1416
1417 #ifdef SUPPORT_ACLS
1418                 if (preserve_acls && !S_ISLNK(file->mode)) {
1419                         sx.st.st_mode = file->mode;
1420                         sx.acc_acl = sx.def_acl = NULL;
1421                         if (get_acl(fname, &sx) < 0) {
1422                                 io_error |= IOERR_GENERAL;
1423                                 return NULL;
1424                         }
1425                 }
1426 #endif
1427 #ifdef SUPPORT_XATTRS
1428                 if (preserve_xattrs) {
1429                         sx.xattr = NULL;
1430                         if (get_xattr(fname, &sx) < 0) {
1431                                 io_error |= IOERR_GENERAL;
1432                                 return NULL;
1433                         }
1434                 }
1435 #endif
1436
1437                 send_file_entry(f, fbuf, file,
1438 #ifdef SUPPORT_LINKS
1439                                 symlink_name, symlink_len,
1440 #endif
1441                                 flist->used, flist->ndx_start);
1442
1443 #ifdef SUPPORT_ACLS
1444                 if (preserve_acls && !S_ISLNK(file->mode)) {
1445                         send_acl(&sx, f);
1446                         free_acl(&sx);
1447                 }
1448 #endif
1449 #ifdef SUPPORT_XATTRS
1450                 if (preserve_xattrs) {
1451                         F_XATTR(file) = send_xattr(&sx, f);
1452                         free_xattr(&sx);
1453                 }
1454 #endif
1455         }
1456
1457         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1458
1459         flist_expand(flist, 1);
1460         flist->files[flist->used++] = file;
1461
1462         return file;
1463 }
1464
1465 static void send_if_directory(int f, struct file_list *flist,
1466                               struct file_struct *file,
1467                               char *fbuf, unsigned int ol,
1468                               int flags)
1469 {
1470         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1471
1472         if (S_ISDIR(file->mode)
1473             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1474                 void *save_filters;
1475                 unsigned int len = strlen(fbuf);
1476                 if (len > 1 && fbuf[len-1] == '/')
1477                         fbuf[--len] = '\0';
1478                 if (len >= MAXPATHLEN - 1) {
1479                         io_error |= IOERR_GENERAL;
1480                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1481                                 full_fname(fbuf));
1482                         return;
1483                 }
1484                 save_filters = push_local_filters(fbuf, len);
1485                 send_directory(f, flist, fbuf, len, flags);
1486                 pop_local_filters(save_filters);
1487                 fbuf[ol] = '\0';
1488                 if (is_dot_dir)
1489                         fbuf[ol-1] = '.';
1490         }
1491 }
1492
1493 static int file_compare(const void *file1, const void *file2)
1494 {
1495         return f_name_cmp(*(struct file_struct **)file1,
1496                           *(struct file_struct **)file2);
1497 }
1498
1499 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1500  * version, but I (Wayne) changed the merge code to do less copying and
1501  * to require only half the amount of temporary memory. */
1502 static void fsort_tmp(struct file_struct **fp, size_t num,
1503                       struct file_struct **tmp)
1504 {
1505         struct file_struct **f1, **f2, **t;
1506         size_t n1, n2;
1507
1508         n1 = num / 2;
1509         n2 = num - n1;
1510         f1 = fp;
1511         f2 = fp + n1;
1512
1513         if (n1 > 1)
1514                 fsort_tmp(f1, n1, tmp);
1515         if (n2 > 1)
1516                 fsort_tmp(f2, n2, tmp);
1517
1518         while (f_name_cmp(*f1, *f2) <= 0) {
1519                 if (!--n1)
1520                         return;
1521                 f1++;
1522         }
1523
1524         t = tmp;
1525         memcpy(t, f1, n1 * PTR_SIZE);
1526
1527         *f1++ = *f2++, n2--;
1528
1529         while (n1 > 0 && n2 > 0) {
1530                 if (f_name_cmp(*t, *f2) <= 0)
1531                         *f1++ = *t++, n1--;
1532                 else
1533                         *f1++ = *f2++, n2--;
1534         }
1535
1536         if (n1 > 0)
1537                 memcpy(f1, t, n1 * PTR_SIZE);
1538 }
1539
1540 /* This file-struct sorting routine makes sure that any identical names in
1541  * the file list stay in the same order as they were in the original list.
1542  * This is particularly vital in inc_recurse mode where we expect a sort
1543  * on the flist to match the exact order of a sort on the dir_flist. */
1544 static void fsort(struct file_struct **fp, size_t num)
1545 {
1546         if (num <= 1)
1547                 return;
1548
1549         if (use_qsort)
1550                 qsort(fp, num, PTR_SIZE, file_compare);
1551         else {
1552                 struct file_struct **tmp = new_array(struct file_struct *,
1553                                                      (num+1) / 2);
1554                 fsort_tmp(fp, num, tmp);
1555                 free(tmp);
1556         }
1557 }
1558
1559 /* We take an entire set of sibling dirs from the sorted flist and link them
1560  * into the tree, setting the appropriate parent/child/sibling pointers. */
1561 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1562                              int dir_cnt)
1563 {
1564         int i;
1565         int32 *dp = NULL;
1566         int32 *parent_dp = parent_ndx < 0 ? NULL
1567                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1568
1569         flist_expand(dir_flist, dir_cnt);
1570         dir_flist->sorted = dir_flist->files;
1571
1572         for (i = 0; dir_cnt; i++) {
1573                 struct file_struct *file = from_flist->sorted[i];
1574
1575                 if (!S_ISDIR(file->mode))
1576                         continue;
1577
1578                 dir_flist->files[dir_flist->used++] = file;
1579                 dir_cnt--;
1580
1581                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1582                         continue;
1583
1584                 if (dp)
1585                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1586                 else if (parent_dp)
1587                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1588                 else
1589                         send_dir_ndx = dir_flist->used - 1;
1590
1591                 dp = F_DIR_NODE_P(file);
1592                 DIR_PARENT(dp) = parent_ndx;
1593                 DIR_FIRST_CHILD(dp) = -1;
1594         }
1595         if (dp)
1596                 DIR_NEXT_SIBLING(dp) = -1;
1597 }
1598
1599 static void interpret_stat_error(const char *fname, int is_dir)
1600 {
1601         if (errno == ENOENT) {
1602                 io_error |= IOERR_VANISHED;
1603                 rprintf(FWARNING, "%s has vanished: %s\n",
1604                         is_dir ? "directory" : "file", full_fname(fname));
1605         } else {
1606                 io_error |= IOERR_GENERAL;
1607                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1608                         full_fname(fname));
1609         }
1610 }
1611
1612 /* This function is normally called by the sender, but the receiving side also
1613  * calls it from get_dirlist() with f set to -1 so that we just construct the
1614  * file list in memory without sending it over the wire.  Also, get_dirlist()
1615  * might call this with f set to -2, which also indicates that local filter
1616  * rules should be ignored. */
1617 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1618                            int flags)
1619 {
1620         struct dirent *di;
1621         unsigned remainder;
1622         char *p;
1623         DIR *d;
1624         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1625         int start = flist->used;
1626         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1627
1628         assert(flist != NULL);
1629
1630         if (!(d = opendir(fbuf))) {
1631                 if (errno == ENOENT) {
1632                         if (am_sender) /* Can abuse this for vanished error w/ENOENT: */
1633                                 interpret_stat_error(fbuf, True);
1634                         return;
1635                 }
1636                 io_error |= IOERR_GENERAL;
1637                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1638                 return;
1639         }
1640
1641         p = fbuf + len;
1642         if (len != 1 || *fbuf != '/')
1643                 *p++ = '/';
1644         *p = '\0';
1645         remainder = MAXPATHLEN - (p - fbuf);
1646
1647         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1648                 char *dname = d_name(di);
1649                 if (dname[0] == '.' && (dname[1] == '\0'
1650                     || (dname[1] == '.' && dname[2] == '\0')))
1651                         continue;
1652                 if (strlcpy(p, dname, remainder) >= remainder) {
1653                         io_error |= IOERR_GENERAL;
1654                         rprintf(FERROR_XFER,
1655                                 "cannot send long-named file %s\n",
1656                                 full_fname(fbuf));
1657                         continue;
1658                 }
1659                 if (dname[0] == '\0') {
1660                         io_error |= IOERR_GENERAL;
1661                         rprintf(FERROR_XFER,
1662                                 "cannot send file with empty name in %s\n",
1663                                 full_fname(fbuf));
1664                         continue;
1665                 }
1666
1667                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1668         }
1669
1670         fbuf[len] = '\0';
1671
1672         if (errno) {
1673                 io_error |= IOERR_GENERAL;
1674                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1675         }
1676
1677         closedir(d);
1678
1679         if (f >= 0 && recurse && !divert_dirs) {
1680                 int i, end = flist->used - 1;
1681                 /* send_if_directory() bumps flist->used, so use "end". */
1682                 for (i = start; i <= end; i++)
1683                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1684         }
1685 }
1686
1687 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1688                               char *start, char *limit, int flags, char name_type)
1689 {
1690         static char lastpath[MAXPATHLEN] = "";
1691         static int lastpath_len = 0;
1692         static struct file_struct *lastpath_struct = NULL;
1693         struct file_struct *file;
1694         item_list *relname_list;
1695         relnamecache **rnpp;
1696         int len, need_new_dir, depth = 0;
1697         struct filter_list_struct save_filter_list = filter_list;
1698
1699         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1700         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1701
1702         if (inc_recurse) {
1703                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1704                  && lastpath_len == limit - fname
1705                  && strncmp(lastpath, fname, lastpath_len) == 0)
1706                         need_new_dir = 0;
1707                 else
1708                         need_new_dir = 1;
1709         } else {
1710                 char *tp = fname, *lp = lastpath;
1711                 /* Skip any initial directories in our path that we
1712                  * have in common with lastpath. */
1713                 assert(start == fname);
1714                 for ( ; ; tp++, lp++) {
1715                         if (tp == limit) {
1716                                 if (*lp == '/' || *lp == '\0')
1717                                         goto done;
1718                                 break;
1719                         }
1720                         if (*lp != *tp)
1721                                 break;
1722                         if (*tp == '/') {
1723                                 start = tp;
1724                                 depth++;
1725                         }
1726                 }
1727                 need_new_dir = 1;
1728         }
1729
1730         if (need_new_dir) {
1731                 int save_copy_links = copy_links;
1732                 int save_xfer_dirs = xfer_dirs;
1733                 char *slash;
1734
1735                 copy_links = xfer_dirs = 1;
1736
1737                 *limit = '\0';
1738
1739                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1740                         *slash = '\0';
1741                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1742                         depth++;
1743                         if (!inc_recurse && file && S_ISDIR(file->mode))
1744                                 change_local_filter_dir(fname, strlen(fname), depth);
1745                         *slash = '/';
1746                 }
1747
1748                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1749                 if (inc_recurse) {
1750                         if (file && !S_ISDIR(file->mode))
1751                                 file = NULL;
1752                         lastpath_struct = file;
1753                 } else if (file && S_ISDIR(file->mode))
1754                         change_local_filter_dir(fname, strlen(fname), ++depth);
1755
1756                 strlcpy(lastpath, fname, sizeof lastpath);
1757                 lastpath_len = limit - fname;
1758
1759                 *limit = '/';
1760
1761                 copy_links = save_copy_links;
1762                 xfer_dirs = save_xfer_dirs;
1763
1764                 if (!inc_recurse)
1765                         goto done;
1766         }
1767
1768         if (!lastpath_struct)
1769                 goto done; /* dir must have vanished */
1770
1771         len = strlen(limit+1);
1772         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1773         if (!relname_list) {
1774                 if (!(relname_list = new0(item_list)))
1775                         out_of_memory("send_implied_dirs");
1776                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1777         }
1778         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1779         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1780                 out_of_memory("send_implied_dirs");
1781         (*rnpp)->name_type = name_type;
1782         strlcpy((*rnpp)->fname, limit+1, len + 1);
1783
1784 done:
1785         filter_list = save_filter_list;
1786 }
1787
1788 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1789 {
1790         char fbuf[MAXPATHLEN];
1791         item_list *relname_list;
1792         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1793         size_t j;
1794
1795         f_name(file, fbuf);
1796         dlen = strlen(fbuf);
1797
1798         if (!change_pathname(file, NULL, 0))
1799                 exit_cleanup(RERR_FILESELECT);
1800
1801         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1802
1803         if (file->flags & FLAG_CONTENT_DIR) {
1804                 if (one_file_system) {
1805                         STRUCT_STAT st;
1806                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1807                                 interpret_stat_error(fbuf, True);
1808                                 return;
1809                         }
1810                         filesystem_dev = st.st_dev;
1811                 }
1812                 send_directory(f, flist, fbuf, dlen, flags);
1813         }
1814
1815         if (!relative_paths)
1816                 return;
1817
1818         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1819         if (!relname_list)
1820                 return;
1821
1822         for (j = 0; j < relname_list->count; j++) {
1823                 char *slash;
1824                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1825                 char name_type = rnp->name_type;
1826
1827                 fbuf[dlen] = '/';
1828                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1829                 free(rnp);
1830                 if (len >= (int)sizeof fbuf)
1831                         continue; /* Impossible... */
1832
1833                 slash = strchr(fbuf+dlen+1, '/');
1834                 if (slash) {
1835                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1836                         continue;
1837                 }
1838
1839                 if (name_type != NORMAL_NAME) {
1840                         STRUCT_STAT st;
1841                         if (link_stat(fbuf, &st, 1) != 0) {
1842                                 interpret_stat_error(fbuf, True);
1843                                 continue;
1844                         }
1845                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1846                 } else
1847                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1848         }
1849
1850         free(relname_list);
1851 }
1852
1853 void send_extra_file_list(int f, int at_least)
1854 {
1855         struct file_list *flist;
1856         int64 start_write;
1857         uint16 prev_flags;
1858         int old_cnt, save_io_error = io_error;
1859
1860         if (flist_eof)
1861                 return;
1862
1863         /* Keep sending data until we have the requested number of
1864          * files in the upcoming file-lists. */
1865         old_cnt = cur_flist->used;
1866         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1867                 old_cnt += flist->used;
1868         while (file_total - old_cnt < at_least) {
1869                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1870                 int dir_ndx, dstart = dir_count;
1871                 const char *pathname = F_PATHNAME(file);
1872                 int32 *dp;
1873
1874                 flist = flist_new(0, "send_extra_file_list");
1875                 start_write = stats.total_written;
1876
1877                 if (unsort_ndx)
1878                         dir_ndx = F_NDX(file);
1879                 else
1880                         dir_ndx = send_dir_ndx;
1881                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1882                 flist->parent_ndx = dir_ndx;
1883
1884                 send1extra(f, file, flist);
1885                 prev_flags = file->flags;
1886                 dp = F_DIR_NODE_P(file);
1887
1888                 /* If there are any duplicate directory names that follow, we
1889                  * send all the dirs together in one file-list.  The dir_flist
1890                  * tree links all the child subdirs onto the last dup dir. */
1891                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1892                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1893                         send_dir_ndx = dir_ndx;
1894                         file = dir_flist->sorted[dir_ndx];
1895                         /* Try to avoid some duplicate scanning of identical dirs. */
1896                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1897                                 file->flags &= ~FLAG_CONTENT_DIR;
1898                         send1extra(f, file, flist);
1899                         prev_flags = file->flags;
1900                         dp = F_DIR_NODE_P(file);
1901                 }
1902
1903                 write_byte(f, 0);
1904
1905                 if (need_unsorted_flist) {
1906                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1907                                 out_of_memory("send_extra_file_list");
1908                         memcpy(flist->sorted, flist->files,
1909                                flist->used * sizeof (struct file_struct*));
1910                 } else
1911                         flist->sorted = flist->files;
1912
1913                 flist_sort_and_clean(flist, 0);
1914
1915                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1916                 flist_done_allocating(flist);
1917
1918                 file_total += flist->used;
1919                 stats.flist_size += stats.total_written - start_write;
1920                 stats.num_files += flist->used;
1921                 if (verbose > 3)
1922                         output_flist(flist);
1923
1924                 if (DIR_FIRST_CHILD(dp) >= 0) {
1925                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1926                         send_dir_depth++;
1927                 } else {
1928                         while (DIR_NEXT_SIBLING(dp) < 0) {
1929                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1930                                         write_ndx(f, NDX_FLIST_EOF);
1931                                         flist_eof = 1;
1932                                         change_local_filter_dir(NULL, 0, 0);
1933                                         goto finish;
1934                                 }
1935                                 send_dir_depth--;
1936                                 file = dir_flist->sorted[send_dir_ndx];
1937                                 dp = F_DIR_NODE_P(file);
1938                         }
1939                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1940                 }
1941         }
1942
1943   finish:
1944         if (io_error != save_io_error && !ignore_errors)
1945                 send_msg_int(MSG_IO_ERROR, io_error);
1946 }
1947
1948 struct file_list *send_file_list(int f, int argc, char *argv[])
1949 {
1950         static const char *lastdir;
1951         static int lastdir_len = -1;
1952         int len, dirlen;
1953         STRUCT_STAT st;
1954         char *p, *dir;
1955         struct file_list *flist;
1956         struct timeval start_tv, end_tv;
1957         int64 start_write;
1958         int use_ff_fd = 0;
1959         int disable_buffering;
1960         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1961         int reading_remotely = filesfrom_host != NULL;
1962         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1963 #ifdef ICONV_OPTION
1964                      | (filesfrom_convert ? RL_CONVERT : 0)
1965 #endif
1966                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1967         int implied_dot_dir = 0;
1968
1969         rprintf(FLOG, "building file list\n");
1970         if (show_filelist_p())
1971                 start_filelist_progress("building file list");
1972         else if (inc_recurse && verbose && !am_server)
1973                 rprintf(FCLIENT, "sending incremental file list\n");
1974
1975         start_write = stats.total_written;
1976         gettimeofday(&start_tv, NULL);
1977
1978         if (relative_paths && protocol_version >= 30)
1979                 implied_dirs = 1; /* We send flagged implied dirs */
1980
1981 #ifdef SUPPORT_HARD_LINKS
1982         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1983                 init_hard_links();
1984 #endif
1985
1986         flist = cur_flist = flist_new(0, "send_file_list");
1987         if (inc_recurse) {
1988                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1989                 flags |= FLAG_DIVERT_DIRS;
1990         } else
1991                 dir_flist = cur_flist;
1992
1993         disable_buffering = io_start_buffering_out(f);
1994         if (filesfrom_fd >= 0) {
1995                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
1996                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
1997                                 full_fname(argv[0]));
1998                         exit_cleanup(RERR_FILESELECT);
1999                 }
2000                 use_ff_fd = 1;
2001         }
2002
2003         if (!orig_dir)
2004                 orig_dir = strdup(curr_dir);
2005
2006         while (1) {
2007                 char fbuf[MAXPATHLEN], *fn, name_type;
2008
2009                 if (use_ff_fd) {
2010                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2011                                 break;
2012                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2013                 } else {
2014                         if (argc-- == 0)
2015                                 break;
2016                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2017                         if (sanitize_paths)
2018                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2019                 }
2020
2021                 len = strlen(fbuf);
2022                 if (relative_paths) {
2023                         /* We clean up fbuf below. */
2024                         name_type = NORMAL_NAME;
2025                 } else if (!len || fbuf[len - 1] == '/') {
2026                         if (len == 2 && fbuf[0] == '.') {
2027                                 /* Turn "./" into just "." rather than "./." */
2028                                 fbuf[--len] = '\0';
2029                         } else {
2030                                 if (len + 1 >= MAXPATHLEN)
2031                                         overflow_exit("send_file_list");
2032                                 fbuf[len++] = '.';
2033                                 fbuf[len] = '\0';
2034                         }
2035                         name_type = DOTDIR_NAME;
2036                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2037                     && (len == 2 || fbuf[len-3] == '/')) {
2038                         if (len + 2 >= MAXPATHLEN)
2039                                 overflow_exit("send_file_list");
2040                         fbuf[len++] = '/';
2041                         fbuf[len++] = '.';
2042                         fbuf[len] = '\0';
2043                         name_type = DOTDIR_NAME;
2044                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2045                         name_type = DOTDIR_NAME;
2046                 else
2047                         name_type = NORMAL_NAME;
2048
2049                 dir = NULL;
2050
2051                 if (!relative_paths) {
2052                         p = strrchr(fbuf, '/');
2053                         if (p) {
2054                                 *p = '\0';
2055                                 if (p == fbuf)
2056                                         dir = "/";
2057                                 else
2058                                         dir = fbuf;
2059                                 len -= p - fbuf + 1;
2060                                 fn = p + 1;
2061                         } else
2062                                 fn = fbuf;
2063                 } else {
2064                         if ((p = strstr(fbuf, "/./")) != NULL) {
2065                                 *p = '\0';
2066                                 if (p == fbuf)
2067                                         dir = "/";
2068                                 else {
2069                                         dir = fbuf;
2070                                         clean_fname(dir, 0);
2071                                 }
2072                                 fn = p + 3;
2073                                 while (*fn == '/')
2074                                         fn++;
2075                                 if (!*fn)
2076                                         *--fn = '\0'; /* ensure room for '.' */
2077                         } else
2078                                 fn = fbuf;
2079                         /* A leading ./ can be used in relative mode to affect
2080                          * the dest dir without its name being in the path. */
2081                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2082                                 send_file_name(f, flist, ".", NULL,
2083                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2084                                     ALL_FILTERS);
2085                                 implied_dot_dir = 1;
2086                         }
2087                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2088                                             | CFN_DROP_TRAILING_DOT_DIR);
2089                         if (len == 1) {
2090                                 if (fn[0] == '/') {
2091                                         fn = "/.";
2092                                         len = 2;
2093                                         name_type = DOTDIR_NAME;
2094                                 } else if (fn[0] == '.')
2095                                         name_type = DOTDIR_NAME;
2096                         } else if (fn[len-1] == '/') {
2097                                 fn[--len] = '\0';
2098                                 if (len == 1 && *fn == '.')
2099                                         name_type = DOTDIR_NAME;
2100                                 else
2101                                         name_type = SLASH_ENDING_NAME;
2102                         }
2103                         /* Reject a ".." dir in the active part of the path. */
2104                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2105                                 if ((p[2] == '/' || p[2] == '\0')
2106                                  && (p == fn || p[-1] == '/')) {
2107                                         rprintf(FERROR,
2108                                             "found \"..\" dir in relative path: %s\n",
2109                                             fn);
2110                                         exit_cleanup(RERR_SYNTAX);
2111                                 }
2112                         }
2113                 }
2114
2115                 if (!*fn) {
2116                         len = 1;
2117                         fn = ".";
2118                         name_type = DOTDIR_NAME;
2119                 }
2120
2121                 dirlen = dir ? strlen(dir) : 0;
2122                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2123                         if (!change_pathname(NULL, dir, -dirlen))
2124                                 continue;
2125                         lastdir = pathname;
2126                         lastdir_len = pathname_len;
2127                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2128                         continue;
2129
2130                 if (fn != fbuf)
2131                         memmove(fbuf, fn, len + 1);
2132
2133                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2134                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2135                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2136                         io_error |= IOERR_GENERAL;
2137                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2138                                 full_fname(fbuf));
2139                         continue;
2140                 }
2141
2142                 /* A dot-dir should not be excluded! */
2143                 if (name_type != DOTDIR_NAME
2144                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2145                         continue;
2146
2147                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2148                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2149                         continue;
2150                 }
2151
2152                 if (inc_recurse && relative_paths && *fbuf) {
2153                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2154                                 if (p - fbuf == 1 && *fbuf == '.') {
2155                                         if ((fn = strchr(p+1, '/')) != NULL)
2156                                                 p = fn;
2157                                 } else
2158                                         fn = p;
2159                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2160                                 if (fn == p)
2161                                         continue;
2162                         }
2163                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2164                         /* Send the implied directories at the start of the
2165                          * source spec, so we get their permissions right. */
2166                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2167                 }
2168
2169                 if (one_file_system)
2170                         filesystem_dev = st.st_dev;
2171
2172                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2173                         struct file_struct *file;
2174                         file = send_file_name(f, flist, fbuf, &st,
2175                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2176                                               NO_FILTERS);
2177                         if (!file)
2178                                 continue;
2179                         if (inc_recurse) {
2180                                 if (name_type == DOTDIR_NAME) {
2181                                         if (send_dir_depth < 0) {
2182                                                 send_dir_depth = 0;
2183                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2184                                         }
2185                                         send_directory(f, flist, fbuf, len, flags);
2186                                 }
2187                         } else
2188                                 send_if_directory(f, flist, file, fbuf, len, flags);
2189                 } else
2190                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2191         }
2192
2193         gettimeofday(&end_tv, NULL);
2194         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2195                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2196         if (stats.flist_buildtime == 0)
2197                 stats.flist_buildtime = 1;
2198         start_tv = end_tv;
2199
2200         write_byte(f, 0); /* Indicate end of file list */
2201
2202 #ifdef SUPPORT_HARD_LINKS
2203         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2204                 idev_destroy();
2205 #endif
2206
2207         if (show_filelist_p())
2208                 finish_filelist_progress(flist);
2209
2210         gettimeofday(&end_tv, NULL);
2211         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2212                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2213
2214         /* When converting names, both sides keep an unsorted file-list array
2215          * because the names will differ on the sending and receiving sides
2216          * (both sides will use the unsorted index number for each item). */
2217
2218         /* Sort the list without removing any duplicates.  This allows the
2219          * receiving side to ask for whatever name it kept.  For incremental
2220          * recursion mode, the sender marks duplicate dirs so that it can
2221          * send them together in a single file-list. */
2222         if (need_unsorted_flist) {
2223                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2224                         out_of_memory("send_file_list");
2225                 memcpy(flist->sorted, flist->files,
2226                        flist->used * sizeof (struct file_struct*));
2227         } else
2228                 flist->sorted = flist->files;
2229         flist_sort_and_clean(flist, 0);
2230         file_total += flist->used;
2231
2232         if (numeric_ids <= 0 && !inc_recurse)
2233                 send_id_list(f);
2234
2235         set_msg_fd_in(-1);
2236
2237         /* send the io_error flag */
2238         if (protocol_version < 30)
2239                 write_int(f, ignore_errors ? 0 : io_error);
2240         else if (io_error && !ignore_errors)
2241                 send_msg_int(MSG_IO_ERROR, io_error);
2242
2243         if (disable_buffering)
2244                 io_end_buffering_out();
2245
2246         stats.flist_size = stats.total_written - start_write;
2247         stats.num_files = flist->used;
2248
2249         if (verbose > 3)
2250                 output_flist(flist);
2251
2252         if (verbose > 2)
2253                 rprintf(FINFO, "send_file_list done\n");
2254
2255         if (inc_recurse) {
2256                 send_dir_depth = 1;
2257                 add_dirs_to_tree(-1, flist, dir_count);
2258                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2259                         flist->parent_ndx = -1;
2260                 flist_done_allocating(flist);
2261                 if (send_dir_ndx < 0) {
2262                         write_ndx(f, NDX_FLIST_EOF);
2263                         flist_eof = 1;
2264                 }
2265                 else if (file_total == 1) {
2266                         /* If we're creating incremental file-lists and there
2267                          * was just 1 item in the first file-list, send 1 more
2268                          * file-list to check if this is a 1-file xfer. */
2269                         send_extra_file_list(f, 1);
2270                 }
2271         }
2272
2273         return flist;
2274 }
2275
2276 struct file_list *recv_file_list(int f)
2277 {
2278         struct file_list *flist;
2279         int dstart, flags;
2280         int64 start_read;
2281         int save_verbose = verbose;
2282
2283         if (!first_flist)
2284                 rprintf(FLOG, "receiving file list\n");
2285         if (show_filelist_p())
2286                 start_filelist_progress("receiving file list");
2287         else if (inc_recurse && verbose && !am_server && !first_flist)
2288                 rprintf(FCLIENT, "receiving incremental file list\n");
2289
2290         start_read = stats.total_read;
2291
2292 #ifdef SUPPORT_HARD_LINKS
2293         if (preserve_hard_links && !first_flist)
2294                 init_hard_links();
2295 #endif
2296
2297         flist = flist_new(0, "recv_file_list");
2298
2299         if (inc_recurse) {
2300                 if (flist->ndx_start == 1)
2301                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2302                 dstart = dir_flist->used;
2303         } else {
2304                 dir_flist = flist;
2305                 dstart = 0;
2306         }
2307
2308         if (am_server && verbose > 2)
2309                 verbose = 2;
2310         while ((flags = read_byte(f)) != 0) {
2311                 struct file_struct *file;
2312
2313                 flist_expand(flist, 1);
2314
2315                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2316                         flags |= read_byte(f) << 8;
2317                 file = recv_file_entry(flist, flags, f);
2318
2319                 if (inc_recurse && S_ISDIR(file->mode)) {
2320                         flist_expand(dir_flist, 1);
2321                         dir_flist->files[dir_flist->used++] = file;
2322                 }
2323
2324                 flist->files[flist->used++] = file;
2325
2326                 maybe_emit_filelist_progress(flist->used);
2327
2328                 if (verbose > 2) {
2329                         char *name = f_name(file, NULL);
2330                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2331                 }
2332         }
2333         file_total += flist->used;
2334         verbose = save_verbose;
2335
2336         if (verbose > 2)
2337                 rprintf(FINFO, "received %d names\n", flist->used);
2338
2339         if (show_filelist_p())
2340                 finish_filelist_progress(flist);
2341
2342         if (need_unsorted_flist) {
2343                 /* Create an extra array of index pointers that we can sort for
2344                  * the generator's use (for wading through the files in sorted
2345                  * order and for calling flist_find()).  We keep the "files"
2346                  * list unsorted for our exchange of index numbers with the
2347                  * other side (since their names may not sort the same). */
2348                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2349                         out_of_memory("recv_file_list");
2350                 memcpy(flist->sorted, flist->files,
2351                        flist->used * sizeof (struct file_struct*));
2352                 if (inc_recurse && dir_flist->used > dstart) {
2353                         static int dir_flist_malloced = 0;
2354                         if (dir_flist_malloced < dir_flist->malloced) {
2355                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2356                                                         struct file_struct *,
2357                                                         dir_flist->malloced);
2358                                 dir_flist_malloced = dir_flist->malloced;
2359                         }
2360                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2361                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2362                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2363                 }
2364         } else {
2365                 flist->sorted = flist->files;
2366                 if (inc_recurse && dir_flist->used > dstart) {
2367                         dir_flist->sorted = dir_flist->files;
2368                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2369                 }
2370         }
2371
2372         if (inc_recurse)
2373                 flist_done_allocating(flist);
2374         else if (f >= 0)
2375                 recv_id_list(f, flist);
2376
2377         flist_sort_and_clean(flist, relative_paths);
2378
2379         if (protocol_version < 30) {
2380                 /* Recv the io_error flag */
2381                 if (ignore_errors)
2382                         read_int(f);
2383                 else
2384                         io_error |= read_int(f);
2385         } else if (inc_recurse && flist->ndx_start == 1) {
2386                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2387                         flist->parent_ndx = -1;
2388         }
2389
2390         if (verbose > 3)
2391                 output_flist(flist);
2392
2393         if (verbose > 2)
2394                 rprintf(FINFO, "recv_file_list done\n");
2395
2396         stats.flist_size += stats.total_read - start_read;
2397         stats.num_files += flist->used;
2398
2399         return flist;
2400 }
2401
2402 /* This is only used once by the receiver if the very first file-list
2403  * has exactly one item in it. */
2404 void recv_additional_file_list(int f)
2405 {
2406         struct file_list *flist;
2407         int ndx = read_ndx(f);
2408         if (ndx == NDX_FLIST_EOF) {
2409                 flist_eof = 1;
2410                 change_local_filter_dir(NULL, 0, 0);
2411         } else {
2412                 ndx = NDX_FLIST_OFFSET - ndx;
2413                 if (ndx < 0 || ndx >= dir_flist->used) {
2414                         ndx = NDX_FLIST_OFFSET - ndx;
2415                         rprintf(FERROR,
2416                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2417                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2418                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2419                         exit_cleanup(RERR_PROTOCOL);
2420                 }
2421                 if (verbose > 3) {
2422                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2423                                 who_am_i(), ndx);
2424                 }
2425                 flist = recv_file_list(f);
2426                 flist->parent_ndx = ndx;
2427         }
2428 }
2429
2430 /* Search for an identically-named item in the file list.  Note that the
2431  * items must agree in their directory-ness, or no match is returned. */
2432 int flist_find(struct file_list *flist, struct file_struct *f)
2433 {
2434         int low = flist->low, high = flist->high;
2435         int diff, mid, mid_up;
2436
2437         while (low <= high) {
2438                 mid = (low + high) / 2;
2439                 if (F_IS_ACTIVE(flist->sorted[mid]))
2440                         mid_up = mid;
2441                 else {
2442                         /* Scan for the next non-empty entry using the cached
2443                          * distance values.  If the value isn't fully up-to-
2444                          * date, update it. */
2445                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2446                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2447                                 do {
2448                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2449                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2450                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2451                         }
2452                         if (mid_up > high) {
2453                                 /* If there's nothing left above us, set high to
2454                                  * a non-empty entry below us and continue. */
2455                                 high = mid - (int)flist->sorted[mid]->len32;
2456                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2457                                         do {
2458                                             high -= (int)flist->sorted[high]->len32;
2459                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2460                                         flist->sorted[mid]->len32 = mid - high;
2461                                 }
2462                                 continue;
2463                         }
2464                 }
2465                 diff = f_name_cmp(flist->sorted[mid_up], f);
2466                 if (diff == 0) {
2467                         if (protocol_version < 29
2468                             && S_ISDIR(flist->sorted[mid_up]->mode)
2469                             != S_ISDIR(f->mode))
2470                                 return -1;
2471                         return mid_up;
2472                 }
2473                 if (diff < 0)
2474                         low = mid_up + 1;
2475                 else
2476                         high = mid - 1;
2477         }
2478         return -1;
2479 }
2480
2481 /* Search for an identically-named item in the file list.  Differs from
2482  * flist_find in that an item that agrees with "f" in directory-ness is
2483  * preferred but one that does not is still found. */
2484 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2485 {
2486         mode_t save_mode;
2487         int ndx;
2488
2489         /* First look for an item that agrees in directory-ness. */
2490         ndx = flist_find(flist, f);
2491         if (ndx >= 0)
2492                 return ndx;
2493
2494         /* Temporarily flip f->mode to look for an item of opposite
2495          * directory-ness. */
2496         save_mode = f->mode;
2497         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2498         ndx = flist_find(flist, f);
2499         f->mode = save_mode;
2500         return ndx;
2501 }
2502
2503 /*
2504  * Free up any resources a file_struct has allocated
2505  * and clear the file.
2506  */
2507 void clear_file(struct file_struct *file)
2508 {
2509         /* The +1 zeros out the first char of the basename. */
2510         memset(file, 0, FILE_STRUCT_LEN + 1);
2511         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2512          * entry.  Likewise for len32 in the opposite direction.  We assume
2513          * that we're alone for now since flist_find() will adjust the counts
2514          * it runs into that aren't up-to-date. */
2515         file->len32 = F_DEPTH(file) = 1;
2516 }
2517
2518 /* Allocate a new file list. */
2519 struct file_list *flist_new(int flags, char *msg)
2520 {
2521         struct file_list *flist;
2522
2523         if (!(flist = new0(struct file_list)))
2524                 out_of_memory(msg);
2525
2526         if (flags & FLIST_TEMP) {
2527                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2528                                                 out_of_memory, POOL_INTERN)))
2529                         out_of_memory(msg);
2530         } else {
2531                 /* This is a doubly linked list with prev looping back to
2532                  * the end of the list, but the last next pointer is NULL. */
2533                 if (!first_flist) {
2534                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2535                                                 out_of_memory, POOL_INTERN);
2536                         if (!flist->file_pool)
2537                                 out_of_memory(msg);
2538
2539                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2540
2541                         first_flist = cur_flist = flist->prev = flist;
2542                 } else {
2543                         struct file_list *prev = first_flist->prev;
2544
2545                         flist->file_pool = first_flist->file_pool;
2546
2547                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2548                         flist->flist_num = prev->flist_num + 1;
2549
2550                         flist->prev = prev;
2551                         prev->next = first_flist->prev = flist;
2552                 }
2553                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2554                 flist_cnt++;
2555         }
2556
2557         return flist;
2558 }
2559
2560 /* Free up all elements in a flist. */
2561 void flist_free(struct file_list *flist)
2562 {
2563         if (!flist->prev) {
2564                 /* Was FLIST_TEMP dir-list. */
2565         } else if (flist == flist->prev) {
2566                 first_flist = cur_flist = NULL;
2567                 file_total = 0;
2568                 flist_cnt = 0;
2569         } else {
2570                 if (flist == cur_flist)
2571                         cur_flist = flist->next;
2572                 if (flist == first_flist)
2573                         first_flist = first_flist->next;
2574                 else {
2575                         flist->prev->next = flist->next;
2576                         if (!flist->next)
2577                                 flist->next = first_flist;
2578                 }
2579                 flist->next->prev = flist->prev;
2580                 file_total -= flist->used;
2581                 flist_cnt--;
2582         }
2583
2584         if (!flist->prev || !flist_cnt)
2585                 pool_destroy(flist->file_pool);
2586         else
2587                 pool_free_old(flist->file_pool, flist->pool_boundary);
2588
2589         if (flist->sorted && flist->sorted != flist->files)
2590                 free(flist->sorted);
2591         free(flist->files);
2592         free(flist);
2593 }
2594
2595 /* This routine ensures we don't have any duplicate names in our file list.
2596  * duplicate names can cause corruption because of the pipelining. */
2597 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2598 {
2599         char fbuf[MAXPATHLEN];
2600         int i, prev_i;
2601
2602         if (!flist)
2603                 return;
2604         if (flist->used == 0) {
2605                 flist->high = -1;
2606                 flist->low = 0;
2607                 return;
2608         }
2609
2610         fsort(flist->sorted, flist->used);
2611
2612         if (!am_sender || inc_recurse) {
2613                 for (i = prev_i = 0; i < flist->used; i++) {
2614                         if (F_IS_ACTIVE(flist->sorted[i])) {
2615                                 prev_i = i;
2616                                 break;
2617                         }
2618                 }
2619                 flist->low = prev_i;
2620         } else {
2621                 i = prev_i = flist->used - 1;
2622                 flist->low = 0;
2623         }
2624
2625         while (++i < flist->used) {
2626                 int j;
2627                 struct file_struct *file = flist->sorted[i];
2628
2629                 if (!F_IS_ACTIVE(file))
2630                         continue;
2631                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2632                         j = prev_i;
2633                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2634                         int save_mode = file->mode;
2635                         /* Make sure that this directory doesn't duplicate a
2636                          * non-directory earlier in the list. */
2637                         flist->high = prev_i;
2638                         file->mode = S_IFREG;
2639                         j = flist_find(flist, file);
2640                         file->mode = save_mode;
2641                 } else
2642                         j = -1;
2643                 if (j >= 0) {
2644                         int keep, drop;
2645                         /* If one is a dir and the other is not, we want to
2646                          * keep the dir because it might have contents in the
2647                          * list.  Otherwise keep the first one. */
2648                         if (S_ISDIR(file->mode)) {
2649                                 struct file_struct *fp = flist->sorted[j];
2650                                 if (!S_ISDIR(fp->mode))
2651                                         keep = i, drop = j;
2652                                 else {
2653                                         if (am_sender)
2654                                                 file->flags |= FLAG_DUPLICATE;
2655                                         else { /* Make sure we merge our vital flags. */
2656                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2657                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2658                                         }
2659                                         keep = j, drop = i;
2660                                 }
2661                         } else
2662                                 keep = j, drop = i;
2663
2664                         if (!am_sender) {
2665                                 if (verbose > 1) {
2666                                         rprintf(FINFO,
2667                                             "removing duplicate name %s from file list (%d)\n",
2668                                             f_name(file, fbuf), drop + flist->ndx_start);
2669                                 }
2670                                 clear_file(flist->sorted[drop]);
2671                         }
2672
2673                         if (keep == i) {
2674                                 if (flist->low == drop) {
2675                                         for (j = drop + 1;
2676                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2677                                              j++) {}
2678                                         flist->low = j;
2679                                 }
2680                                 prev_i = i;
2681                         }
2682                 } else
2683                         prev_i = i;
2684         }
2685         flist->high = prev_i;
2686
2687         if (strip_root) {
2688                 /* We need to strip off the leading slashes for relative
2689                  * paths, but this must be done _after_ the sorting phase. */
2690                 for (i = flist->low; i <= flist->high; i++) {
2691                         struct file_struct *file = flist->sorted[i];
2692
2693                         if (!file->dirname)
2694                                 continue;
2695                         while (*file->dirname == '/')
2696                                 file->dirname++;
2697                         if (!*file->dirname)
2698                                 file->dirname = NULL;
2699                 }
2700         }
2701
2702         if (prune_empty_dirs && !am_sender) {
2703                 int j, prev_depth = 0;
2704
2705                 prev_i = 0; /* It's OK that this isn't really true. */
2706
2707                 for (i = flist->low; i <= flist->high; i++) {
2708                         struct file_struct *fp, *file = flist->sorted[i];
2709
2710                         /* This temporarily abuses the F_DEPTH() value for a
2711                          * directory that is in a chain that might get pruned.
2712                          * We restore the old value if it gets a reprieve. */
2713                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2714                                 /* Dump empty dirs when coming back down. */
2715                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2716                                         fp = flist->sorted[prev_i];
2717                                         if (F_DEPTH(fp) >= 0)
2718                                                 break;
2719                                         prev_i = -F_DEPTH(fp)-1;
2720                                         clear_file(fp);
2721                                 }
2722                                 prev_depth = F_DEPTH(file);
2723                                 if (is_excluded(f_name(file, fbuf), 1,
2724                                                        ALL_FILTERS)) {
2725                                         /* Keep dirs through this dir. */
2726                                         for (j = prev_depth-1; ; j--) {
2727                                                 fp = flist->sorted[prev_i];
2728                                                 if (F_DEPTH(fp) >= 0)
2729                                                         break;
2730                                                 prev_i = -F_DEPTH(fp)-1;
2731                                                 F_DEPTH(fp) = j;
2732                                         }
2733                                 } else
2734                                         F_DEPTH(file) = -prev_i-1;
2735                                 prev_i = i;
2736                         } else {
2737                                 /* Keep dirs through this non-dir. */
2738                                 for (j = prev_depth; ; j--) {
2739                                         fp = flist->sorted[prev_i];
2740                                         if (F_DEPTH(fp) >= 0)
2741                                                 break;
2742                                         prev_i = -F_DEPTH(fp)-1;
2743                                         F_DEPTH(fp) = j;
2744                                 }
2745                         }
2746                 }
2747                 /* Dump all remaining empty dirs. */
2748                 while (1) {
2749                         struct file_struct *fp = flist->sorted[prev_i];
2750                         if (F_DEPTH(fp) >= 0)
2751                                 break;
2752                         prev_i = -F_DEPTH(fp)-1;
2753                         clear_file(fp);
2754                 }
2755
2756                 for (i = flist->low; i <= flist->high; i++) {
2757                         if (F_IS_ACTIVE(flist->sorted[i]))
2758                                 break;
2759                 }
2760                 flist->low = i;
2761                 for (i = flist->high; i >= flist->low; i--) {
2762                         if (F_IS_ACTIVE(flist->sorted[i]))
2763                                 break;
2764                 }
2765                 flist->high = i;
2766         }
2767 }
2768
2769 static void output_flist(struct file_list *flist)
2770 {
2771         char uidbuf[16], gidbuf[16], depthbuf[16];
2772         struct file_struct *file;
2773         const char *root, *dir, *slash, *name, *trail;
2774         const char *who = who_am_i();
2775         int i;
2776
2777         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2778                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2779         for (i = 0; i < flist->used; i++) {
2780                 file = flist->files[i];
2781                 if ((am_root || am_sender) && uid_ndx) {
2782                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2783                                  F_OWNER(file));
2784                 } else
2785                         *uidbuf = '\0';
2786                 if (gid_ndx) {
2787                         static char parens[] = "(\0)\0\0\0";
2788                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2789                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2790                                  pp, F_GROUP(file), pp + 2);
2791                 } else
2792                         *gidbuf = '\0';
2793                 if (!am_sender)
2794                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2795                 if (F_IS_ACTIVE(file)) {
2796                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2797                         if ((dir = file->dirname) == NULL)
2798                                 dir = slash = "";
2799                         else
2800                                 slash = "/";
2801                         name = file->basename;
2802                         trail = S_ISDIR(file->mode) ? "/" : "";
2803                 } else
2804                         root = dir = slash = name = trail = "";
2805                 rprintf(FINFO,
2806                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2807                         who, i + flist->ndx_start,
2808                         root, dir, slash, name, trail,
2809                         (int)file->mode, (double)F_LENGTH(file),
2810                         uidbuf, gidbuf, file->flags);
2811         }
2812 }
2813
2814 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2815 enum fnc_type { t_PATH, t_ITEM };
2816
2817 static int found_prefix;
2818
2819 /* Compare the names of two file_struct entities, similar to how strcmp()
2820  * would do if it were operating on the joined strings.
2821  *
2822  * Some differences beginning with protocol_version 29: (1) directory names
2823  * are compared with an assumed trailing slash so that they compare in a
2824  * way that would cause them to sort immediately prior to any content they
2825  * may have; (2) a directory of any name compares after a non-directory of
2826  * any name at the same depth; (3) a directory with name "." compares prior
2827  * to anything else.  These changes mean that a directory and a non-dir
2828  * with the same name will not compare as equal (protocol_version >= 29).
2829  *
2830  * The dirname component can be an empty string, but the basename component
2831  * cannot (and never is in the current codebase).  The basename component
2832  * may be NULL (for a removed item), in which case it is considered to be
2833  * after any existing item. */
2834 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2835 {
2836         int dif;
2837         const uchar *c1, *c2;
2838         enum fnc_state state1, state2;
2839         enum fnc_type type1, type2;
2840         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2841
2842         if (!f1 || !F_IS_ACTIVE(f1)) {
2843                 if (!f2 || !F_IS_ACTIVE(f2))
2844                         return 0;
2845                 return -1;
2846         }
2847         if (!f2 || !F_IS_ACTIVE(f2))
2848                 return 1;
2849
2850         c1 = (uchar*)f1->dirname;
2851         c2 = (uchar*)f2->dirname;
2852         if (c1 == c2)
2853                 c1 = c2 = NULL;
2854         if (!c1) {
2855                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2856                 c1 = (const uchar*)f1->basename;
2857                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2858                         type1 = t_ITEM;
2859                         state1 = s_TRAILING;
2860                         c1 = (uchar*)"";
2861                 } else
2862                         state1 = s_BASE;
2863         } else {
2864                 type1 = t_path;
2865                 state1 = s_DIR;
2866         }
2867         if (!c2) {
2868                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2869                 c2 = (const uchar*)f2->basename;
2870                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2871                         type2 = t_ITEM;
2872                         state2 = s_TRAILING;
2873                         c2 = (uchar*)"";
2874                 } else
2875                         state2 = s_BASE;
2876         } else {
2877                 type2 = t_path;
2878                 state2 = s_DIR;
2879         }
2880
2881         if (type1 != type2)
2882                 return type1 == t_PATH ? 1 : -1;
2883
2884         do {
2885                 if (!*c1) {
2886                         switch (state1) {
2887                         case s_DIR:
2888                                 state1 = s_SLASH;
2889                                 c1 = (uchar*)"/";
2890                                 break;
2891                         case s_SLASH:
2892                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2893                                 c1 = (const uchar*)f1->basename;
2894                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2895                                         type1 = t_ITEM;
2896                                         state1 = s_TRAILING;
2897                                         c1 = (uchar*)"";
2898                                 } else
2899                                         state1 = s_BASE;
2900                                 break;
2901                         case s_BASE:
2902                                 state1 = s_TRAILING;
2903                                 if (type1 == t_PATH) {
2904                                         c1 = (uchar*)"/";
2905                                         break;
2906                                 }
2907                                 /* FALL THROUGH */
2908                         case s_TRAILING:
2909                                 type1 = t_ITEM;
2910                                 break;
2911                         }
2912                         if (*c2 && type1 != type2)
2913                                 return type1 == t_PATH ? 1 : -1;
2914                 }
2915                 if (!*c2) {
2916                         switch (state2) {
2917                         case s_DIR:
2918                                 state2 = s_SLASH;
2919                                 c2 = (uchar*)"/";
2920                                 break;
2921                         case s_SLASH:
2922                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2923                                 c2 = (const uchar*)f2->basename;
2924                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2925                                         type2 = t_ITEM;
2926                                         state2 = s_TRAILING;
2927                                         c2 = (uchar*)"";
2928                                 } else
2929                                         state2 = s_BASE;
2930                                 break;
2931                         case s_BASE:
2932                                 state2 = s_TRAILING;
2933                                 if (type2 == t_PATH) {
2934                                         c2 = (uchar*)"/";
2935                                         break;
2936                                 }
2937                                 /* FALL THROUGH */
2938                         case s_TRAILING:
2939                                 found_prefix = 1;
2940                                 if (!*c1)
2941                                         return 0;
2942                                 type2 = t_ITEM;
2943                                 break;
2944                         }
2945                         if (type1 != type2)
2946                                 return type1 == t_PATH ? 1 : -1;
2947                 }
2948         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2949
2950         return dif;
2951 }
2952
2953 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2954  * not match if f2's basename is not an exact match of a path element in f1.
2955  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2956 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2957 {
2958         found_prefix = 0;
2959         f_name_cmp(f1, f2);
2960         return found_prefix;
2961 }
2962
2963 char *f_name_buf(void)
2964 {
2965         static char names[5][MAXPATHLEN];
2966         static unsigned int n;
2967
2968         n = (n + 1) % (sizeof names / sizeof names[0]);
2969
2970         return names[n];
2971 }
2972
2973 /* Return a copy of the full filename of a flist entry, using the indicated
2974  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2975  * done because we checked the size when creating the file_struct entry.
2976  */
2977 char *f_name(const struct file_struct *f, char *fbuf)
2978 {
2979         if (!f || !F_IS_ACTIVE(f))
2980                 return NULL;
2981
2982         if (!fbuf)
2983                 fbuf = f_name_buf();
2984
2985         if (f->dirname) {
2986                 int len = strlen(f->dirname);
2987                 memcpy(fbuf, f->dirname, len);
2988                 fbuf[len] = '/';
2989                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2990         } else
2991                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2992
2993         return fbuf;
2994 }
2995
2996 /* Do a non-recursive scan of the named directory, possibly ignoring all
2997  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2998  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2999  * buffer (the functions we call will append names onto the end, but the old
3000  * dir value will be restored on exit). */
3001 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
3002 {
3003         struct file_list *dirlist;
3004         char dirbuf[MAXPATHLEN];
3005         int save_recurse = recurse;
3006         int save_xfer_dirs = xfer_dirs;
3007         int save_prune_empty_dirs = prune_empty_dirs;
3008
3009         if (dlen < 0) {
3010                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3011                 if (dlen >= MAXPATHLEN)
3012                         return NULL;
3013                 dirname = dirbuf;
3014         }
3015
3016         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3017
3018         recurse = 0;
3019         xfer_dirs = 1;
3020         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, FLAG_CONTENT_DIR);
3021         xfer_dirs = save_xfer_dirs;
3022         recurse = save_recurse;
3023         if (do_progress)
3024                 flist_count_offset += dirlist->used;
3025
3026         prune_empty_dirs = 0;
3027         dirlist->sorted = dirlist->files;
3028         flist_sort_and_clean(dirlist, 0);
3029         prune_empty_dirs = save_prune_empty_dirs;
3030
3031         if (verbose > 3)
3032                 output_flist(dirlist);
3033
3034         return dirlist;
3035 }