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 "inums.h"
  27 #include "io.h"
  28
  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 always_checksum;
  36 extern int module_id;
  37 extern int ignore_errors;
  38 extern int numeric_ids;
  39 extern int recurse;
  40 extern int use_qsort;
  41 extern int xfer_dirs;
  42 extern int filesfrom_fd;
  43 extern int one_file_system;
  44 extern int copy_dirlinks;
  45 extern int keep_dirlinks;
  46 extern int preserve_uid;
  47 extern int preserve_gid;
  48 extern int preserve_acls;
  49 extern int preserve_xattrs;
  50 extern int preserve_links;
  51 extern int preserve_hard_links;
  52 extern int preserve_devices;
  53 extern int preserve_specials;
  54 extern int uid_ndx;
  55 extern int gid_ndx;
  56 extern int eol_nulls;
  57 extern int relative_paths;
  58 extern int implied_dirs;
  59 extern int file_extra_cnt;
  60 extern int ignore_perishable;
  61 extern int non_perishable_cnt;
  62 extern int prune_empty_dirs;
  63 extern int copy_links;
  64 extern int copy_unsafe_links;
  65 extern int protocol_version;
  66 extern int sanitize_paths;
  67 extern int munge_symlinks;
  68 extern int need_unsorted_flist;
  69 extern int sender_symlink_iconv;
  70 extern int output_needs_newline;
  71 extern int sender_keeps_checksum;
  72 extern int unsort_ndx;
  73 extern struct stats stats;
  74 extern char *filesfrom_host;
  75 extern char *usermap, *groupmap;
  76
  77 extern char curr_dir[MAXPATHLEN];
  78
  79 extern struct chmod_mode_struct *chmod_modes;
  80
  81 extern struct filter_list_struct filter_list;
  82 extern struct filter_list_struct daemon_filter_list;
  83
  84 #ifdef ICONV_OPTION
  85 extern int filesfrom_convert;
  86 extern iconv_t ic_send, ic_recv;
  87 #endif
  88
  89 #define PTR_SIZE (sizeof (struct file_struct *))
  90
  91 int io_error;
  92 int checksum_len;
  93 dev_t filesystem_dev; /* used to implement -x */
  94
  95 struct file_list *cur_flist, *first_flist, *dir_flist;
  96 int send_dir_ndx = -1, send_dir_depth = -1;
  97 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  98 int file_total = 0; /* total of all active items over all file-lists */
  99 int flist_eof = 0; /* all the file-lists are now known */
 100
 101 #define NORMAL_NAME 0
 102 #define SLASH_ENDING_NAME 1
 103 #define DOTDIR_NAME 2
 104
 105 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 106  * internally, even if this platform does not allow files to have 64-bit inums.
 107  * The only exception is if we're on a platform with no 64-bit type at all.
 108  *
 109  * Because we use read_longint() to get these off the wire, if you transfer
 110  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 111  * machine with no 64-bit types then you will get an overflow error.
 112  *
 113  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 114  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 115  * be truncated.  But it's a kind of silly thing to do anyhow. */
 116
 117 /* The tmp_* vars are used as a cache area by make_file() to store data
 118  * that the sender doesn't need to remember in its file list.  The data
 119  * will survive just long enough to be used by send_file_entry(). */
 120 static dev_t tmp_rdev;
 121 #ifdef SUPPORT_HARD_LINKS
 122 static int64 tmp_dev, tmp_ino;
 123 #endif
 124 static char tmp_sum[MAX_DIGEST_LEN];
 125
 126 static char empty_sum[MAX_DIGEST_LEN];
 127 static int flist_count_offset; /* for --delete --progress */
 128
 129 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 130 static void output_flist(struct file_list *flist);
 131
 132 void init_flist(void)
 133 {
 134         if (DEBUG_GTE(FLIST, 4)) {
 135                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 136                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 137         }
 138         checksum_len = protocol_version < 21 ? 2
 139                      : protocol_version < 30 ? MD4_DIGEST_LEN
 140                      : MD5_DIGEST_LEN;
 141 }
 142
 143 static int show_filelist_p(void)
 144 {
 145         return INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse;
 146 }
 147
 148 static void start_filelist_progress(char *kind)
 149 {
 150         rprintf(FCLIENT, "%s ... ", kind);
 151         output_needs_newline = 1;
 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 (INFO_GTE(FLIST, 2) && 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 (INFO_GTE(FLIST, 2)) {
 169                 /* This overwrites the progress line */
 170                 rprintf(FINFO, "%d file%sto consider\n",
 171                         flist->used, flist->used == 1 ? " " : "s ");
 172         } else {
 173                 output_needs_newline = 0;
 174                 rprintf(FINFO, "done\n");
 175         }
 176 }
 177
 178 void show_flist_stats(void)
 179 {
 180         /* Nothing yet */
 181 }
 182
 183 /* Stat either a symlink or its referent, depending on the settings of
 184  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 185  *
 186  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 187  * MAXPATHLEN chars) will be set to the symlink's target string.
 188  *
 189  * The stat structure pointed to by stp will contain information about the
 190  * link or the referent as appropriate, if they exist. */
 191 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 192 {
 193 #ifdef SUPPORT_LINKS
 194         if (link_stat(path, stp, copy_dirlinks) < 0)
 195                 return -1;
 196         if (S_ISLNK(stp->st_mode)) {
 197                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 198                 if (llen < 0)
 199                         return -1;
 200                 linkbuf[llen] = '\0';
 201                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 202                         if (INFO_GTE(SYMSAFE, 1)) {
 203                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 204                                         path, linkbuf);
 205                         }
 206                         return x_stat(path, stp, NULL);
 207                 }
 208                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 209                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 210                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 211                                 llen - SYMLINK_PREFIX_LEN + 1);
 212                 }
 213         }
 214         return 0;
 215 #else
 216         return x_stat(path, stp, NULL);
 217 #endif
 218 }
 219
 220 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 221 {
 222 #ifdef SUPPORT_LINKS
 223         if (copy_links)
 224                 return x_stat(path, stp, NULL);
 225         if (x_lstat(path, stp, NULL) < 0)
 226                 return -1;
 227         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 228                 STRUCT_STAT st;
 229                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 230                         *stp = st;
 231         }
 232         return 0;
 233 #else
 234         return x_stat(path, stp, NULL);
 235 #endif
 236 }
 237
 238 static inline int is_daemon_excluded(const char *fname, int is_dir)
 239 {
 240         if (daemon_filter_list.head
 241          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 242                 errno = ENOENT;
 243                 return 1;
 244         }
 245         return 0;
 246 }
 247
 248 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 249 {
 250         if (daemon_filter_list.head) {
 251                 char *slash = path;
 252
 253                 while ((slash = strchr(slash+1, '/')) != NULL) {
 254                         int ret;
 255                         *slash = '\0';
 256                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 257                         *slash = '/';
 258                         if (ret < 0) {
 259                                 errno = ENOENT;
 260                                 return 1;
 261                         }
 262                 }
 263
 264                 if (!ignore_filename
 265                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 266                         errno = ENOENT;
 267                         return 1;
 268                 }
 269         }
 270
 271         return 0;
 272 }
 273
 274 /* This function is used to check if a file should be included/excluded
 275  * from the list of files based on its name and type etc.  The value of
 276  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 277 static int is_excluded(const char *fname, int is_dir, int filter_level)
 278 {
 279 #if 0 /* This currently never happens, so avoid a useless compare. */
 280         if (filter_level == NO_FILTERS)
 281                 return 0;
 282 #endif
 283         if (is_daemon_excluded(fname, is_dir))
 284                 return 1;
 285         if (filter_level != ALL_FILTERS)
 286                 return 0;
 287         if (filter_list.head
 288             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 289                 return 1;
 290         return 0;
 291 }
 292
 293 static void send_directory(int f, struct file_list *flist,
 294                            char *fbuf, int len, int flags);
 295
 296 static const char *pathname, *orig_dir;
 297 static int pathname_len;
 298
 299 /* Make sure flist can hold at least flist->used + extra entries. */
 300 static void flist_expand(struct file_list *flist, int extra)
 301 {
 302         struct file_struct **new_ptr;
 303
 304         if (flist->used + extra <= flist->malloced)
 305                 return;
 306
 307         if (flist->malloced < FLIST_START)
 308                 flist->malloced = FLIST_START;
 309         else if (flist->malloced >= FLIST_LINEAR)
 310                 flist->malloced += FLIST_LINEAR;
 311         else
 312                 flist->malloced *= 2;
 313
 314         /* In case count jumped or we are starting the list
 315          * with a known size just set it. */
 316         if (flist->malloced < flist->used + extra)
 317                 flist->malloced = flist->used + extra;
 318
 319         new_ptr = realloc_array(flist->files, struct file_struct *,
 320                                 flist->malloced);
 321
 322         if (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
 323                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n",
 324                     who_am_i(),
 325                     big_num(sizeof flist->files[0] * flist->malloced),
 326                     (new_ptr == flist->files) ? " not" : "");
 327         }
 328
 329         flist->files = new_ptr;
 330
 331         if (!flist->files)
 332                 out_of_memory("flist_expand");
 333 }
 334
 335 static void flist_done_allocating(struct file_list *flist)
 336 {
 337         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 338         if (flist->pool_boundary == ptr)
 339                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 340         else
 341                 flist->pool_boundary = ptr;
 342 }
 343
 344 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 345  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 346  * with dir == NULL taken to be the starting directory, and dirlen < 0
 347  * indicating that strdup(dir) should be called and then the -dirlen length
 348  * value checked to ensure that it is not daemon-excluded. */
 349 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 350 {
 351         if (dirlen < 0) {
 352                 char *cpy = strdup(dir);
 353                 if (*cpy != '/')
 354                         change_dir(orig_dir, CD_SKIP_CHDIR);
 355                 if (path_is_daemon_excluded(cpy, 0))
 356                         goto chdir_error;
 357                 dir = cpy;
 358                 dirlen = -dirlen;
 359         } else {
 360                 if (file) {
 361                         if (pathname == F_PATHNAME(file))
 362                                 return 1;
 363                         dir = F_PATHNAME(file);
 364                         if (dir)
 365                                 dirlen = strlen(dir);
 366                 } else if (pathname == dir)
 367                         return 1;
 368                 if (dir && *dir != '/')
 369                         change_dir(orig_dir, CD_SKIP_CHDIR);
 370         }
 371
 372         pathname = dir;
 373         pathname_len = dirlen;
 374
 375         if (!dir)
 376                 dir = orig_dir;
 377
 378         if (!change_dir(dir, CD_NORMAL)) {
 379           chdir_error:
 380                 io_error |= IOERR_GENERAL;
 381                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
 382                 if (dir != orig_dir)
 383                         change_dir(orig_dir, CD_NORMAL);
 384                 pathname = NULL;
 385                 pathname_len = 0;
 386                 return 0;
 387         }
 388
 389         return 1;
 390 }
 391
 392 static void send_file_entry(int f, const char *fname, struct file_struct *file,
 393 #ifdef SUPPORT_LINKS
 394                             const char *symlink_name, int symlink_len,
 395 #endif
 396                             int ndx, int first_ndx)
 397 {
 398         static time_t modtime;
 399         static mode_t mode;
 400 #ifdef SUPPORT_HARD_LINKS
 401         static int64 dev;
 402 #endif
 403         static dev_t rdev;
 404         static uint32 rdev_major;
 405         static uid_t uid;
 406         static gid_t gid;
 407         static const char *user_name, *group_name;
 408         static char lastname[MAXPATHLEN];
 409 #ifdef SUPPORT_HARD_LINKS
 410         int first_hlink_ndx = -1;
 411 #endif
 412         int l1, l2;
 413         int xflags;
 414
 415         /* Initialize starting value of xflags and adjust counts. */
 416         if (S_ISREG(file->mode))
 417                 xflags = 0;
 418         else if (S_ISDIR(file->mode)) {
 419                 stats.num_dirs++;
 420                 if (protocol_version >= 30) {
 421                         if (file->flags & FLAG_CONTENT_DIR)
 422                                 xflags = file->flags & FLAG_TOP_DIR;
 423                         else if (file->flags & FLAG_IMPLIED_DIR)
 424                                 xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 425                         else
 426                                 xflags = XMIT_NO_CONTENT_DIR;
 427                 } else
 428                         xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 429         } else {
 430                 if (S_ISLNK(file->mode))
 431                         stats.num_symlinks++;
 432                 else if (IS_DEVICE(file->mode))
 433                         stats.num_devices++;
 434                 else
 435                         stats.num_specials++;
 436                 xflags = 0;
 437         }
 438
 439         if (file->mode == mode)
 440                 xflags |= XMIT_SAME_MODE;
 441         else
 442                 mode = file->mode;
 443
 444         if ((preserve_devices && IS_DEVICE(mode))
 445          || (preserve_specials && IS_SPECIAL(mode))) {
 446                 if (protocol_version < 28) {
 447                         if (tmp_rdev == rdev)
 448                                 xflags |= XMIT_SAME_RDEV_pre28;
 449                         else
 450                                 rdev = tmp_rdev;
 451                 } else {
 452                         rdev = tmp_rdev;
 453                         if ((uint32)major(rdev) == rdev_major)
 454                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 455                         else
 456                                 rdev_major = major(rdev);
 457                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 458                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 459                 }
 460         } else if (protocol_version < 28)
 461                 rdev = MAKEDEV(0, 0);
 462         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 463                 xflags |= XMIT_SAME_UID;
 464         else {
 465                 uid = F_OWNER(file);
 466                 if (!numeric_ids) {
 467                         user_name = add_uid(uid);
 468                         if (inc_recurse && user_name)
 469                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 470                 }
 471         }
 472         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 473                 xflags |= XMIT_SAME_GID;
 474         else {
 475                 gid = F_GROUP(file);
 476                 if (!numeric_ids) {
 477                         group_name = add_gid(gid);
 478                         if (inc_recurse && group_name)
 479                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 480                 }
 481         }
 482         if (file->modtime == modtime)
 483                 xflags |= XMIT_SAME_TIME;
 484         else
 485                 modtime = file->modtime;
 486
 487 #ifdef SUPPORT_HARD_LINKS
 488         if (tmp_dev != 0) {
 489                 if (protocol_version >= 30) {
 490                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 491                         first_hlink_ndx = (int32)(long)np->data - 1;
 492                         if (first_hlink_ndx < 0) {
 493                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 494                                 xflags |= XMIT_HLINK_FIRST;
 495                         }
 496                         if (DEBUG_GTE(HLINK, 1)) {
 497                                 if (first_hlink_ndx >= 0) {
 498                                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 499                                                 who_am_i(), first_ndx + ndx, first_hlink_ndx,
 500                                                 first_hlink_ndx >= first_ndx ? "" : "un");
 501                                 } else if (DEBUG_GTE(HLINK, 3)) {
 502                                         rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n",
 503                                                 who_am_i(), first_ndx + ndx,
 504                                                 big_num(tmp_dev), big_num(tmp_ino));
 505                                 }
 506                         }
 507                 } else {
 508                         if (tmp_dev == dev) {
 509                                 if (protocol_version >= 28)
 510                                         xflags |= XMIT_SAME_DEV_pre30;
 511                         } else
 512                                 dev = tmp_dev;
 513                 }
 514                 xflags |= XMIT_HLINKED;
 515         }
 516 #endif
 517
 518         for (l1 = 0;
 519             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 520             l1++) {}
 521         l2 = strlen(fname+l1);
 522
 523         if (l1 > 0)
 524                 xflags |= XMIT_SAME_NAME;
 525         if (l2 > 255)
 526                 xflags |= XMIT_LONG_NAME;
 527
 528         /* We must make sure we don't send a zero flag byte or the
 529          * other end will terminate the flist transfer.  Note that
 530          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 531          * it's harmless way to add a bit to the first flag byte. */
 532         if (protocol_version >= 28) {
 533                 if (!xflags && !S_ISDIR(mode))
 534                         xflags |= XMIT_TOP_DIR;
 535                 if ((xflags & 0xFF00) || !xflags) {
 536                         xflags |= XMIT_EXTENDED_FLAGS;
 537                         write_shortint(f, xflags);
 538                 } else
 539                         write_byte(f, xflags);
 540         } else {
 541                 if (!(xflags & 0xFF))
 542                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 543                 write_byte(f, xflags);
 544         }
 545         if (xflags & XMIT_SAME_NAME)
 546                 write_byte(f, l1);
 547         if (xflags & XMIT_LONG_NAME)
 548                 write_varint30(f, l2);
 549         else
 550                 write_byte(f, l2);
 551         write_buf(f, fname + l1, l2);
 552
 553 #ifdef SUPPORT_HARD_LINKS
 554         if (first_hlink_ndx >= 0) {
 555                 write_varint(f, first_hlink_ndx);
 556                 if (first_hlink_ndx >= first_ndx)
 557                         goto the_end;
 558         }
 559 #endif
 560
 561         write_varlong30(f, F_LENGTH(file), 3);
 562         if (!(xflags & XMIT_SAME_TIME)) {
 563                 if (protocol_version >= 30)
 564                         write_varlong(f, modtime, 4);
 565                 else
 566                         write_int(f, modtime);
 567         }
 568         if (!(xflags & XMIT_SAME_MODE))
 569                 write_int(f, to_wire_mode(mode));
 570         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 571                 if (protocol_version < 30)
 572                         write_int(f, uid);
 573                 else {
 574                         write_varint(f, uid);
 575                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 576                                 int len = strlen(user_name);
 577                                 write_byte(f, len);
 578                                 write_buf(f, user_name, len);
 579                         }
 580                 }
 581         }
 582         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 583                 if (protocol_version < 30)
 584                         write_int(f, gid);
 585                 else {
 586                         write_varint(f, gid);
 587                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 588                                 int len = strlen(group_name);
 589                                 write_byte(f, len);
 590                                 write_buf(f, group_name, len);
 591                         }
 592                 }
 593         }
 594         if ((preserve_devices && IS_DEVICE(mode))
 595          || (preserve_specials && IS_SPECIAL(mode))) {
 596                 if (protocol_version < 28) {
 597                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 598                                 write_int(f, (int)rdev);
 599                 } else {
 600                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 601                                 write_varint30(f, major(rdev));
 602                         if (protocol_version >= 30)
 603                                 write_varint(f, minor(rdev));
 604                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 605                                 write_byte(f, minor(rdev));
 606                         else
 607                                 write_int(f, minor(rdev));
 608                 }
 609         }
 610
 611 #ifdef SUPPORT_LINKS
 612         if (symlink_len) {
 613                 write_varint30(f, symlink_len);
 614                 write_buf(f, symlink_name, symlink_len);
 615         }
 616 #endif
 617
 618 #ifdef SUPPORT_HARD_LINKS
 619         if (tmp_dev != 0 && protocol_version < 30) {
 620                 if (protocol_version < 26) {
 621                         /* 32-bit dev_t and ino_t */
 622                         write_int(f, (int32)dev);
 623                         write_int(f, (int32)tmp_ino);
 624                 } else {
 625                         /* 64-bit dev_t and ino_t */
 626                         if (!(xflags & XMIT_SAME_DEV_pre30))
 627                                 write_longint(f, dev);
 628                         write_longint(f, tmp_ino);
 629                 }
 630         }
 631 #endif
 632
 633         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 634                 const char *sum;
 635                 if (S_ISREG(mode))
 636                         sum = tmp_sum;
 637                 else {
 638                         /* Prior to 28, we sent a useless set of nulls. */
 639                         sum = empty_sum;
 640                 }
 641                 write_buf(f, sum, checksum_len);
 642         }
 643
 644 #ifdef SUPPORT_HARD_LINKS
 645   the_end:
 646 #endif
 647         strlcpy(lastname, fname, MAXPATHLEN);
 648
 649         if (S_ISREG(mode) || S_ISLNK(mode))
 650                 stats.total_size += F_LENGTH(file);
 651 }
 652
 653 static struct file_struct *recv_file_entry(struct file_list *flist,
 654                                            int xflags, int f)
 655 {
 656         static int64 modtime;
 657         static mode_t mode;
 658 #ifdef SUPPORT_HARD_LINKS
 659         static int64 dev;
 660 #endif
 661         static dev_t rdev;
 662         static uint32 rdev_major;
 663         static uid_t uid;
 664         static gid_t gid;
 665         static uint16 gid_flags;
 666         static char lastname[MAXPATHLEN], *lastdir;
 667         static int lastdir_depth, lastdir_len = -1;
 668         static unsigned int del_hier_name_len = 0;
 669         static int in_del_hier = 0;
 670         char thisname[MAXPATHLEN];
 671         unsigned int l1 = 0, l2 = 0;
 672         int alloc_len, basename_len, linkname_len;
 673         int extra_len = file_extra_cnt * EXTRA_LEN;
 674         int first_hlink_ndx = -1;
 675         int64 file_length;
 676         const char *basename;
 677         struct file_struct *file;
 678         alloc_pool_t *pool;
 679         char *bp;
 680
 681         if (xflags & XMIT_SAME_NAME)
 682                 l1 = read_byte(f);
 683
 684         if (xflags & XMIT_LONG_NAME)
 685                 l2 = read_varint30(f);
 686         else
 687                 l2 = read_byte(f);
 688
 689         if (l2 >= MAXPATHLEN - l1) {
 690                 rprintf(FERROR,
 691                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 692                         xflags, l1, l2, lastname, who_am_i());
 693                 overflow_exit("recv_file_entry");
 694         }
 695
 696         strlcpy(thisname, lastname, l1 + 1);
 697         read_sbuf(f, &thisname[l1], l2);
 698         thisname[l1 + l2] = 0;
 699
 700         /* Abuse basename_len for a moment... */
 701         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 702
 703 #ifdef ICONV_OPTION
 704         if (ic_recv != (iconv_t)-1) {
 705                 xbuf outbuf, inbuf;
 706
 707                 INIT_CONST_XBUF(outbuf, thisname);
 708                 INIT_XBUF(inbuf, lastname, basename_len, (size_t)-1);
 709
 710                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 711                         io_error |= IOERR_GENERAL;
 712                         rprintf(FERROR_UTF8,
 713                             "[%s] cannot convert filename: %s (%s)\n",
 714                             who_am_i(), lastname, strerror(errno));
 715                         outbuf.len = 0;
 716                 }
 717                 thisname[outbuf.len] = '\0';
 718         }
 719 #endif
 720
 721         if (*thisname)
 722                 clean_fname(thisname, 0);
 723
 724         if (sanitize_paths)
 725                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 726
 727         if ((basename = strrchr(thisname, '/')) != NULL) {
 728                 int len = basename++ - thisname;
 729                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 730                         lastdir = new_array(char, len + 1);
 731                         memcpy(lastdir, thisname, len);
 732                         lastdir[len] = '\0';
 733                         lastdir_len = len;
 734                         lastdir_depth = count_dir_elements(lastdir);
 735                 }
 736         } else
 737                 basename = thisname;
 738         basename_len = strlen(basename) + 1; /* count the '\0' */
 739
 740 #ifdef SUPPORT_HARD_LINKS
 741         if (protocol_version >= 30
 742          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 743                 first_hlink_ndx = read_varint(f);
 744                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 745                         rprintf(FERROR,
 746                                 "hard-link reference out of range: %d (%d)\n",
 747                                 first_hlink_ndx, flist->ndx_start + flist->used);
 748                         exit_cleanup(RERR_PROTOCOL);
 749                 }
 750                 if (DEBUG_GTE(HLINK, 1)) {
 751                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 752                                 who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx,
 753                                 first_hlink_ndx >= flist->ndx_start ? "" : "un");
 754                 }
 755                 if (first_hlink_ndx >= flist->ndx_start) {
 756                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 757                         file_length = F_LENGTH(first);
 758                         modtime = first->modtime;
 759                         mode = first->mode;
 760                         if (preserve_uid)
 761                                 uid = F_OWNER(first);
 762                         if (preserve_gid)
 763                                 gid = F_GROUP(first);
 764                         if ((preserve_devices && IS_DEVICE(mode))
 765                          || (preserve_specials && IS_SPECIAL(mode))) {
 766                                 uint32 *devp = F_RDEV_P(first);
 767                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 768                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 769                         }
 770                         if (preserve_links && S_ISLNK(mode))
 771                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 772                         else
 773                                 linkname_len = 0;
 774                         goto create_object;
 775                 }
 776         }
 777 #endif
 778
 779         file_length = read_varlong30(f, 3);
 780         if (!(xflags & XMIT_SAME_TIME)) {
 781                 if (protocol_version >= 30) {
 782                         modtime = read_varlong(f, 4);
 783 #if SIZEOF_TIME_T < SIZEOF_INT64
 784                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 785                                 rprintf(FERROR_XFER,
 786                                     "Time value of %s truncated on receiver.\n",
 787                                     lastname);
 788                         }
 789 #endif
 790                 } else
 791                         modtime = read_int(f);
 792         }
 793         if (!(xflags & XMIT_SAME_MODE))
 794                 mode = from_wire_mode(read_int(f));
 795
 796         if (chmod_modes && !S_ISLNK(mode))
 797                 mode = tweak_mode(mode, chmod_modes);
 798
 799         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 800                 if (protocol_version < 30)
 801                         uid = (uid_t)read_int(f);
 802                 else {
 803                         uid = (uid_t)read_varint(f);
 804                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 805                                 uid = recv_user_name(f, uid);
 806                         else if (inc_recurse && am_root && (!numeric_ids || usermap))
 807                                 uid = match_uid(uid);
 808                 }
 809         }
 810         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 811                 if (protocol_version < 30)
 812                         gid = (gid_t)read_int(f);
 813                 else {
 814                         gid = (gid_t)read_varint(f);
 815                         gid_flags = 0;
 816                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 817                                 gid = recv_group_name(f, gid, &gid_flags);
 818                         else if (inc_recurse && (!am_root || !numeric_ids || groupmap))
 819                                 gid = match_gid(gid, &gid_flags);
 820                 }
 821         }
 822
 823         if ((preserve_devices && IS_DEVICE(mode))
 824          || (preserve_specials && IS_SPECIAL(mode))) {
 825                 if (protocol_version < 28) {
 826                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 827                                 rdev = (dev_t)read_int(f);
 828                 } else {
 829                         uint32 rdev_minor;
 830                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 831                                 rdev_major = read_varint30(f);
 832                         if (protocol_version >= 30)
 833                                 rdev_minor = read_varint(f);
 834                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 835                                 rdev_minor = read_byte(f);
 836                         else
 837                                 rdev_minor = read_int(f);
 838                         rdev = MAKEDEV(rdev_major, rdev_minor);
 839                 }
 840                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 841                 file_length = 0;
 842         } else if (protocol_version < 28)
 843                 rdev = MAKEDEV(0, 0);
 844
 845 #ifdef SUPPORT_LINKS
 846         if (preserve_links && S_ISLNK(mode)) {
 847                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 848                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 849                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 850                                 linkname_len - 1);
 851                         overflow_exit("recv_file_entry");
 852                 }
 853 #ifdef ICONV_OPTION
 854                 /* We don't know how much extra room we need to convert
 855                  * the as-yet-unread symlink data, so let's hope that a
 856                  * double-size buffer is plenty. */
 857                 if (sender_symlink_iconv)
 858                         linkname_len *= 2;
 859 #endif
 860                 if (munge_symlinks)
 861                         linkname_len += SYMLINK_PREFIX_LEN;
 862         }
 863         else
 864 #endif
 865                 linkname_len = 0;
 866
 867 #ifdef SUPPORT_HARD_LINKS
 868   create_object:
 869         if (preserve_hard_links) {
 870                 if (protocol_version < 28 && S_ISREG(mode))
 871                         xflags |= XMIT_HLINKED;
 872                 if (xflags & XMIT_HLINKED)
 873                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 874         }
 875 #endif
 876
 877 #ifdef SUPPORT_ACLS
 878         /* Directories need an extra int32 for the default ACL. */
 879         if (preserve_acls && S_ISDIR(mode))
 880                 extra_len += EXTRA_LEN;
 881 #endif
 882
 883         if (always_checksum && S_ISREG(mode))
 884                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 885
 886 #if SIZEOF_INT64 >= 8
 887         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 888                 extra_len += EXTRA_LEN;
 889 #endif
 890         if (file_length < 0) {
 891                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 892                 exit_cleanup(RERR_UNSUPPORTED);
 893         }
 894
 895         if (inc_recurse && S_ISDIR(mode)) {
 896                 if (one_file_system) {
 897                         /* Room to save the dir's device for -x */
 898                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 899                 }
 900                 pool = dir_flist->file_pool;
 901         } else
 902                 pool = flist->file_pool;
 903
 904 #if EXTRA_ROUNDING > 0
 905         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 906                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 907 #endif
 908
 909         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 910                   + linkname_len;
 911         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 912
 913         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 914         bp += extra_len;
 915         file = (struct file_struct *)bp;
 916         bp += FILE_STRUCT_LEN;
 917
 918         memcpy(bp, basename, basename_len);
 919
 920 #ifdef SUPPORT_HARD_LINKS
 921         if (xflags & XMIT_HLINKED)
 922                 file->flags |= FLAG_HLINKED;
 923 #endif
 924         file->modtime = (time_t)modtime;
 925         file->len32 = (uint32)file_length;
 926 #if SIZEOF_INT64 >= 8
 927         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 928 #if SIZEOF_CAPITAL_OFF_T < 8
 929                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 930                 exit_cleanup(RERR_UNSUPPORTED);
 931 #else
 932                 file->flags |= FLAG_LENGTH64;
 933                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 934 #endif
 935         }
 936 #endif
 937         file->mode = mode;
 938         if (preserve_uid)
 939                 F_OWNER(file) = uid;
 940         if (preserve_gid) {
 941                 F_GROUP(file) = gid;
 942                 file->flags |= gid_flags;
 943         }
 944         if (unsort_ndx)
 945                 F_NDX(file) = flist->used + flist->ndx_start;
 946
 947         if (basename != thisname) {
 948                 file->dirname = lastdir;
 949                 F_DEPTH(file) = lastdir_depth + 1;
 950         } else
 951                 F_DEPTH(file) = 1;
 952
 953         if (S_ISDIR(mode)) {
 954                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 955                         F_DEPTH(file)--;
 956                 if (protocol_version >= 30) {
 957                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 958                                 if (xflags & XMIT_TOP_DIR)
 959                                         file->flags |= FLAG_TOP_DIR;
 960                                 file->flags |= FLAG_CONTENT_DIR;
 961                         } else if (xflags & XMIT_TOP_DIR)
 962                                 file->flags |= FLAG_IMPLIED_DIR;
 963                 } else if (xflags & XMIT_TOP_DIR) {
 964                         in_del_hier = recurse;
 965                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 966                         if (relative_paths && del_hier_name_len > 2
 967                             && lastname[del_hier_name_len-1] == '.'
 968                             && lastname[del_hier_name_len-2] == '/')
 969                                 del_hier_name_len -= 2;
 970                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 971                 } else if (in_del_hier) {
 972                         if (!relative_paths || !del_hier_name_len
 973                          || (l1 >= del_hier_name_len
 974                           && lastname[del_hier_name_len] == '/'))
 975                                 file->flags |= FLAG_CONTENT_DIR;
 976                         else
 977                                 in_del_hier = 0;
 978                 }
 979         }
 980
 981         if ((preserve_devices && IS_DEVICE(mode))
 982          || (preserve_specials && IS_SPECIAL(mode))) {
 983                 uint32 *devp = F_RDEV_P(file);
 984                 DEV_MAJOR(devp) = major(rdev);
 985                 DEV_MINOR(devp) = minor(rdev);
 986         }
 987
 988 #ifdef SUPPORT_LINKS
 989         if (linkname_len) {
 990                 bp += basename_len;
 991                 if (first_hlink_ndx >= flist->ndx_start) {
 992                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 993                         memcpy(bp, F_SYMLINK(first), linkname_len);
 994                 } else {
 995                         if (munge_symlinks) {
 996                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 997                                 bp += SYMLINK_PREFIX_LEN;
 998                                 linkname_len -= SYMLINK_PREFIX_LEN;
 999                         }
1000 #ifdef ICONV_OPTION
1001                         if (sender_symlink_iconv) {
1002                                 xbuf outbuf, inbuf;
1003
1004                                 alloc_len = linkname_len;
1005                                 linkname_len /= 2;
1006
1007                                 /* Read the symlink data into the end of our double-sized
1008                                  * buffer and then convert it into the right spot. */
1009                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
1010                                           linkname_len - 1, (size_t)-1);
1011                                 read_sbuf(f, inbuf.buf, inbuf.len);
1012                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
1013
1014                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
1015                                         io_error |= IOERR_GENERAL;
1016                                         rprintf(FERROR_XFER,
1017                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1018                                             who_am_i(), full_fname(thisname), strerror(errno));
1019                                         bp = (char*)file->basename;
1020                                         *bp++ = '\0';
1021                                         outbuf.len = 0;
1022                                 }
1023                                 bp[outbuf.len] = '\0';
1024                         } else
1025 #endif
1026                                 read_sbuf(f, bp, linkname_len - 1);
1027                         if (sanitize_paths && !munge_symlinks && *bp)
1028                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
1029                 }
1030         }
1031 #endif
1032
1033 #ifdef SUPPORT_HARD_LINKS
1034         if (preserve_hard_links && xflags & XMIT_HLINKED) {
1035                 if (protocol_version >= 30) {
1036                         if (xflags & XMIT_HLINK_FIRST) {
1037                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1038                         } else
1039                                 F_HL_GNUM(file) = first_hlink_ndx;
1040                 } else {
1041                         static int32 cnt = 0;
1042                         struct ht_int64_node *np;
1043                         int64 ino;
1044                         int32 ndx;
1045                         if (protocol_version < 26) {
1046                                 dev = read_int(f);
1047                                 ino = read_int(f);
1048                         } else {
1049                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1050                                         dev = read_longint(f);
1051                                 ino = read_longint(f);
1052                         }
1053                         np = idev_find(dev, ino);
1054                         ndx = (int32)(long)np->data - 1;
1055                         if (ndx < 0) {
1056                                 ndx = cnt++;
1057                                 np->data = (void*)(long)cnt;
1058                         }
1059                         F_HL_GNUM(file) = ndx;
1060                 }
1061         }
1062 #endif
1063
1064         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1065                 if (S_ISREG(mode))
1066                         bp = F_SUM(file);
1067                 else {
1068                         /* Prior to 28, we get a useless set of nulls. */
1069                         bp = tmp_sum;
1070                 }
1071                 if (first_hlink_ndx >= flist->ndx_start) {
1072                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1073                         memcpy(bp, F_SUM(first), checksum_len);
1074                 } else
1075                         read_buf(f, bp, checksum_len);
1076         }
1077
1078 #ifdef SUPPORT_ACLS
1079         if (preserve_acls && !S_ISLNK(mode))
1080                 receive_acl(file, f);
1081 #endif
1082 #ifdef SUPPORT_XATTRS
1083         if (preserve_xattrs)
1084                 receive_xattr(file, f );
1085 #endif
1086
1087         if (S_ISREG(mode) || S_ISLNK(mode))
1088                 stats.total_size += file_length;
1089
1090         return file;
1091 }
1092
1093 /* Create a file_struct for a named file by reading its stat() information
1094  * and performing extensive checks against global options.
1095  *
1096  * Returns a pointer to the new file struct, or NULL if there was an error
1097  * or this file should be excluded.
1098  *
1099  * Note: Any error (here or in send_file_name) that results in the omission of
1100  * an existent source file from the file list should set
1101  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1102  * destination if --delete is on. */
1103 struct file_struct *make_file(const char *fname, struct file_list *flist,
1104                               STRUCT_STAT *stp, int flags, int filter_level)
1105 {
1106         static char *lastdir;
1107         static int lastdir_len = -1;
1108         struct file_struct *file;
1109         char thisname[MAXPATHLEN];
1110         char linkname[MAXPATHLEN];
1111         int alloc_len, basename_len, linkname_len;
1112         int extra_len = file_extra_cnt * EXTRA_LEN;
1113         const char *basename;
1114         alloc_pool_t *pool;
1115         STRUCT_STAT st;
1116         char *bp;
1117
1118         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1119                 io_error |= IOERR_GENERAL;
1120                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1121                 return NULL;
1122         }
1123         clean_fname(thisname, 0);
1124         if (sanitize_paths)
1125                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1126
1127         if (stp && S_ISDIR(stp->st_mode)) {
1128                 st = *stp; /* Needed for "symlink/." with --relative. */
1129                 *linkname = '\0'; /* make IBM code checker happy */
1130         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1131                 int save_errno = errno;
1132                 /* See if file is excluded before reporting an error. */
1133                 if (filter_level != NO_FILTERS
1134                  && (is_excluded(thisname, 0, filter_level)
1135                   || is_excluded(thisname, 1, filter_level))) {
1136                         if (ignore_perishable && save_errno != ENOENT)
1137                                 non_perishable_cnt++;
1138                         return NULL;
1139                 }
1140                 if (save_errno == ENOENT) {
1141 #ifdef SUPPORT_LINKS
1142                         /* When our options tell us to follow a symlink that
1143                          * points nowhere, tell the user about the symlink
1144                          * instead of giving a "vanished" message.  We only
1145                          * dereference a symlink if one of the --copy*links
1146                          * options was specified, so there's no need for the
1147                          * extra lstat() if one of these options isn't on. */
1148                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1149                          && x_lstat(thisname, &st, NULL) == 0
1150                          && S_ISLNK(st.st_mode)) {
1151                                 io_error |= IOERR_GENERAL;
1152                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1153                                         full_fname(thisname));
1154                         } else
1155 #endif
1156                         {
1157                                 enum logcode c = am_daemon && protocol_version < 28
1158                                                ? FERROR : FWARNING;
1159                                 io_error |= IOERR_VANISHED;
1160                                 rprintf(c, "file has vanished: %s\n",
1161                                         full_fname(thisname));
1162                         }
1163                 } else {
1164                         io_error |= IOERR_GENERAL;
1165                         rsyserr(FERROR_XFER, save_errno, "readlink_stat(%s) failed",
1166                                 full_fname(thisname));
1167                 }
1168                 return NULL;
1169         }
1170
1171         if (filter_level == NO_FILTERS)
1172                 goto skip_filters;
1173
1174         if (S_ISDIR(st.st_mode)) {
1175                 if (!xfer_dirs) {
1176                         rprintf(FINFO, "skipping directory %s\n", thisname);
1177                         return NULL;
1178                 }
1179                 /* -x only affects dirs because we need to avoid recursing
1180                  * into a mount-point directory, not to avoid copying a
1181                  * symlinked file if -L (or similar) was specified. */
1182                 if (one_file_system && st.st_dev != filesystem_dev
1183                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1184                         if (one_file_system > 1) {
1185                                 if (INFO_GTE(MOUNT, 1)) {
1186                                         rprintf(FINFO,
1187                                             "[%s] skipping mount-point dir %s\n",
1188                                             who_am_i(), thisname);
1189                                 }
1190                                 return NULL;
1191                         }
1192                         flags |= FLAG_MOUNT_DIR;
1193                         flags &= ~FLAG_CONTENT_DIR;
1194                 }
1195         } else
1196                 flags &= ~FLAG_CONTENT_DIR;
1197
1198         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1199                 if (ignore_perishable)
1200                         non_perishable_cnt++;
1201                 return NULL;
1202         }
1203
1204         if (lp_ignore_nonreadable(module_id)) {
1205 #ifdef SUPPORT_LINKS
1206                 if (!S_ISLNK(st.st_mode))
1207 #endif
1208                         if (access(thisname, R_OK) != 0)
1209                                 return NULL;
1210         }
1211
1212   skip_filters:
1213
1214         /* Only divert a directory in the main transfer. */
1215         if (flist) {
1216                 if (flist->prev && S_ISDIR(st.st_mode)
1217                  && flags & FLAG_DIVERT_DIRS) {
1218                         /* Room for parent/sibling/next-child info. */
1219                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1220                         if (relative_paths)
1221                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1222                         pool = dir_flist->file_pool;
1223                 } else
1224                         pool = flist->file_pool;
1225         } else {
1226 #ifdef SUPPORT_ACLS
1227                 /* Directories need an extra int32 for the default ACL. */
1228                 if (preserve_acls && S_ISDIR(st.st_mode))
1229                         extra_len += EXTRA_LEN;
1230 #endif
1231                 pool = NULL;
1232         }
1233
1234         if (DEBUG_GTE(FLIST, 2)) {
1235                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1236                         who_am_i(), thisname, filter_level);
1237         }
1238
1239         if ((basename = strrchr(thisname, '/')) != NULL) {
1240                 int len = basename++ - thisname;
1241                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1242                         lastdir = new_array(char, len + 1);
1243                         memcpy(lastdir, thisname, len);
1244                         lastdir[len] = '\0';
1245                         lastdir_len = len;
1246                 }
1247         } else
1248                 basename = thisname;
1249         basename_len = strlen(basename) + 1; /* count the '\0' */
1250
1251 #ifdef SUPPORT_LINKS
1252         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1253 #else
1254         linkname_len = 0;
1255 #endif
1256
1257 #if SIZEOF_CAPITAL_OFF_T >= 8
1258         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1259                 extra_len += EXTRA_LEN;
1260 #endif
1261
1262         if (always_checksum && am_sender && S_ISREG(st.st_mode)) {
1263                 file_checksum(thisname, tmp_sum, st.st_size);
1264                 if (sender_keeps_checksum)
1265                         extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
1266         }
1267
1268 #if EXTRA_ROUNDING > 0
1269         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1270                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1271 #endif
1272
1273         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1274                   + linkname_len;
1275         if (pool)
1276                 bp = pool_alloc(pool, alloc_len, "make_file");
1277         else {
1278                 if (!(bp = new_array(char, alloc_len)))
1279                         out_of_memory("make_file");
1280         }
1281
1282         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1283         bp += extra_len;
1284         file = (struct file_struct *)bp;
1285         bp += FILE_STRUCT_LEN;
1286
1287         memcpy(bp, basename, basename_len);
1288
1289 #ifdef SUPPORT_HARD_LINKS
1290         if (preserve_hard_links && flist && flist->prev) {
1291                 if (protocol_version >= 28
1292                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1293                  : S_ISREG(st.st_mode)) {
1294                         tmp_dev = (int64)st.st_dev + 1;
1295                         tmp_ino = (int64)st.st_ino;
1296                 } else
1297                         tmp_dev = 0;
1298         }
1299 #endif
1300
1301 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1302         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1303                 tmp_rdev = st.st_rdev;
1304                 st.st_size = 0;
1305         }
1306 #endif
1307
1308         file->flags = flags;
1309         file->modtime = st.st_mtime;
1310         file->len32 = (uint32)st.st_size;
1311 #if SIZEOF_CAPITAL_OFF_T >= 8
1312         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1313                 file->flags |= FLAG_LENGTH64;
1314                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1315         }
1316 #endif
1317         file->mode = st.st_mode;
1318         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1319                 F_OWNER(file) = st.st_uid;
1320         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1321                 F_GROUP(file) = st.st_gid;
1322
1323         if (basename != thisname)
1324                 file->dirname = lastdir;
1325
1326 #ifdef SUPPORT_LINKS
1327         if (linkname_len)
1328                 memcpy(bp + basename_len, linkname, linkname_len);
1329 #endif
1330
1331         if (am_sender)
1332                 F_PATHNAME(file) = pathname;
1333         else if (!pool)
1334                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1335
1336         if (basename_len == 0+1) {
1337                 if (!pool)
1338                         unmake_file(file);
1339                 return NULL;
1340         }
1341
1342         if (sender_keeps_checksum && S_ISREG(st.st_mode))
1343                 memcpy(F_SUM(file), tmp_sum, checksum_len);
1344
1345         if (unsort_ndx)
1346                 F_NDX(file) = stats.num_dirs;
1347
1348         return file;
1349 }
1350
1351 /* Only called for temporary file_struct entries created by make_file(). */
1352 void unmake_file(struct file_struct *file)
1353 {
1354         free(REQ_EXTRA(file, F_DEPTH(file)));
1355 }
1356
1357 static struct file_struct *send_file_name(int f, struct file_list *flist,
1358                                           const char *fname, STRUCT_STAT *stp,
1359                                           int flags, int filter_level)
1360 {
1361         struct file_struct *file;
1362
1363         file = make_file(fname, flist, stp, flags, filter_level);
1364         if (!file)
1365                 return NULL;
1366
1367         if (chmod_modes && !S_ISLNK(file->mode))
1368                 file->mode = tweak_mode(file->mode, chmod_modes);
1369
1370         if (f >= 0) {
1371                 char fbuf[MAXPATHLEN];
1372 #ifdef SUPPORT_LINKS
1373                 const char *symlink_name;
1374                 int symlink_len;
1375 #ifdef ICONV_OPTION
1376                 char symlink_buf[MAXPATHLEN];
1377 #endif
1378 #endif
1379 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1380                 stat_x sx;
1381                 init_stat_x(&sx);
1382 #endif
1383
1384 #ifdef SUPPORT_LINKS
1385                 if (preserve_links && S_ISLNK(file->mode)) {
1386                         symlink_name = F_SYMLINK(file);
1387                         symlink_len = strlen(symlink_name);
1388                         if (symlink_len == 0) {
1389                                 io_error |= IOERR_GENERAL;
1390                                 f_name(file, fbuf);
1391                                 rprintf(FERROR_XFER,
1392                                     "skipping symlink with 0-length value: %s\n",
1393                                     full_fname(fbuf));
1394                                 return NULL;
1395                         }
1396                 } else {
1397                         symlink_name = NULL;
1398                         symlink_len = 0;
1399                 }
1400 #endif
1401
1402 #ifdef ICONV_OPTION
1403                 if (ic_send != (iconv_t)-1) {
1404                         xbuf outbuf, inbuf;
1405
1406                         INIT_CONST_XBUF(outbuf, fbuf);
1407
1408                         if (file->dirname) {
1409                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1410                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1411                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1412                                         goto convert_error;
1413                                 outbuf.size += 2;
1414                                 fbuf[outbuf.len++] = '/';
1415                         }
1416
1417                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1418                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1419                           convert_error:
1420                                 io_error |= IOERR_GENERAL;
1421                                 rprintf(FERROR_XFER,
1422                                     "[%s] cannot convert filename: %s (%s)\n",
1423                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1424                                 return NULL;
1425                         }
1426                         fbuf[outbuf.len] = '\0';
1427
1428 #ifdef SUPPORT_LINKS
1429                         if (symlink_len && sender_symlink_iconv) {
1430                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1431                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1432                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1433                                         io_error |= IOERR_GENERAL;
1434                                         f_name(file, fbuf);
1435                                         rprintf(FERROR_XFER,
1436                                             "[%s] cannot convert symlink data for: %s (%s)\n",
1437                                             who_am_i(), full_fname(fbuf), strerror(errno));
1438                                         return NULL;
1439                                 }
1440                                 symlink_buf[outbuf.len] = '\0';
1441
1442                                 symlink_name = symlink_buf;
1443                                 symlink_len = outbuf.len;
1444                         }
1445 #endif
1446                 } else
1447 #endif
1448                         f_name(file, fbuf);
1449
1450 #ifdef SUPPORT_ACLS
1451                 if (preserve_acls && !S_ISLNK(file->mode)) {
1452                         sx.st.st_mode = file->mode;
1453                         if (get_acl(fname, &sx) < 0) {
1454                                 io_error |= IOERR_GENERAL;
1455                                 return NULL;
1456                         }
1457                 }
1458 #endif
1459 #ifdef SUPPORT_XATTRS
1460                 if (preserve_xattrs) {
1461                         if (get_xattr(fname, &sx) < 0) {
1462                                 io_error |= IOERR_GENERAL;
1463                                 return NULL;
1464                         }
1465                 }
1466 #endif
1467
1468                 send_file_entry(f, fbuf, file,
1469 #ifdef SUPPORT_LINKS
1470                                 symlink_name, symlink_len,
1471 #endif
1472                                 flist->used, flist->ndx_start);
1473
1474 #ifdef SUPPORT_ACLS
1475                 if (preserve_acls && !S_ISLNK(file->mode)) {
1476                         send_acl(&sx, f);
1477                         free_acl(&sx);
1478                 }
1479 #endif
1480 #ifdef SUPPORT_XATTRS
1481                 if (preserve_xattrs) {
1482                         F_XATTR(file) = send_xattr(&sx, f);
1483                         free_xattr(&sx);
1484                 }
1485 #endif
1486         }
1487
1488         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1489
1490         flist_expand(flist, 1);
1491         flist->files[flist->used++] = file;
1492
1493         return file;
1494 }
1495
1496 static void send_if_directory(int f, struct file_list *flist,
1497                               struct file_struct *file,
1498                               char *fbuf, unsigned int ol,
1499                               int flags)
1500 {
1501         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1502
1503         if (S_ISDIR(file->mode)
1504             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1505                 void *save_filters;
1506                 unsigned int len = strlen(fbuf);
1507                 if (len > 1 && fbuf[len-1] == '/')
1508                         fbuf[--len] = '\0';
1509                 if (len >= MAXPATHLEN - 1) {
1510                         io_error |= IOERR_GENERAL;
1511                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1512                                 full_fname(fbuf));
1513                         return;
1514                 }
1515                 save_filters = push_local_filters(fbuf, len);
1516                 send_directory(f, flist, fbuf, len, flags);
1517                 pop_local_filters(save_filters);
1518                 fbuf[ol] = '\0';
1519                 if (is_dot_dir)
1520                         fbuf[ol-1] = '.';
1521         }
1522 }
1523
1524 static int file_compare(const void *file1, const void *file2)
1525 {
1526         return f_name_cmp(*(struct file_struct **)file1,
1527                           *(struct file_struct **)file2);
1528 }
1529
1530 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1531  * version, but I (Wayne) changed the merge code to do less copying and
1532  * to require only half the amount of temporary memory. */
1533 static void fsort_tmp(struct file_struct **fp, size_t num,
1534                       struct file_struct **tmp)
1535 {
1536         struct file_struct **f1, **f2, **t;
1537         size_t n1, n2;
1538
1539         n1 = num / 2;
1540         n2 = num - n1;
1541         f1 = fp;
1542         f2 = fp + n1;
1543
1544         if (n1 > 1)
1545                 fsort_tmp(f1, n1, tmp);
1546         if (n2 > 1)
1547                 fsort_tmp(f2, n2, tmp);
1548
1549         while (f_name_cmp(*f1, *f2) <= 0) {
1550                 if (!--n1)
1551                         return;
1552                 f1++;
1553         }
1554
1555         t = tmp;
1556         memcpy(t, f1, n1 * PTR_SIZE);
1557
1558         *f1++ = *f2++, n2--;
1559
1560         while (n1 > 0 && n2 > 0) {
1561                 if (f_name_cmp(*t, *f2) <= 0)
1562                         *f1++ = *t++, n1--;
1563                 else
1564                         *f1++ = *f2++, n2--;
1565         }
1566
1567         if (n1 > 0)
1568                 memcpy(f1, t, n1 * PTR_SIZE);
1569 }
1570
1571 /* This file-struct sorting routine makes sure that any identical names in
1572  * the file list stay in the same order as they were in the original list.
1573  * This is particularly vital in inc_recurse mode where we expect a sort
1574  * on the flist to match the exact order of a sort on the dir_flist. */
1575 static void fsort(struct file_struct **fp, size_t num)
1576 {
1577         if (num <= 1)
1578                 return;
1579
1580         if (use_qsort)
1581                 qsort(fp, num, PTR_SIZE, file_compare);
1582         else {
1583                 struct file_struct **tmp = new_array(struct file_struct *,
1584                                                      (num+1) / 2);
1585                 fsort_tmp(fp, num, tmp);
1586                 free(tmp);
1587         }
1588 }
1589
1590 /* We take an entire set of sibling dirs from the sorted flist and link them
1591  * into the tree, setting the appropriate parent/child/sibling pointers. */
1592 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1593                              int dir_cnt)
1594 {
1595         int i;
1596         int32 *dp = NULL;
1597         int32 *parent_dp = parent_ndx < 0 ? NULL
1598                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1599
1600         flist_expand(dir_flist, dir_cnt);
1601         dir_flist->sorted = dir_flist->files;
1602
1603         for (i = 0; dir_cnt; i++) {
1604                 struct file_struct *file = from_flist->sorted[i];
1605
1606                 if (!S_ISDIR(file->mode))
1607                         continue;
1608
1609                 dir_flist->files[dir_flist->used++] = file;
1610                 dir_cnt--;
1611
1612                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1613                         continue;
1614
1615                 if (dp)
1616                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1617                 else if (parent_dp)
1618                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1619                 else
1620                         send_dir_ndx = dir_flist->used - 1;
1621
1622                 dp = F_DIR_NODE_P(file);
1623                 DIR_PARENT(dp) = parent_ndx;
1624                 DIR_FIRST_CHILD(dp) = -1;
1625         }
1626         if (dp)
1627                 DIR_NEXT_SIBLING(dp) = -1;
1628 }
1629
1630 static void interpret_stat_error(const char *fname, int is_dir)
1631 {
1632         if (errno == ENOENT) {
1633                 io_error |= IOERR_VANISHED;
1634                 rprintf(FWARNING, "%s has vanished: %s\n",
1635                         is_dir ? "directory" : "file", full_fname(fname));
1636         } else {
1637                 io_error |= IOERR_GENERAL;
1638                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1639                         full_fname(fname));
1640         }
1641 }
1642
1643 /* This function is normally called by the sender, but the receiving side also
1644  * calls it from get_dirlist() with f set to -1 so that we just construct the
1645  * file list in memory without sending it over the wire.  Also, get_dirlist()
1646  * might call this with f set to -2, which also indicates that local filter
1647  * rules should be ignored. */
1648 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1649                            int flags)
1650 {
1651         struct dirent *di;
1652         unsigned remainder;
1653         char *p;
1654         DIR *d;
1655         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1656         int start = flist->used;
1657         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1658
1659         assert(flist != NULL);
1660
1661         if (!(d = opendir(fbuf))) {
1662                 if (errno == ENOENT) {
1663                         if (am_sender) /* Can abuse this for vanished error w/ENOENT: */
1664                                 interpret_stat_error(fbuf, True);
1665                         return;
1666                 }
1667                 io_error |= IOERR_GENERAL;
1668                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1669                 return;
1670         }
1671
1672         p = fbuf + len;
1673         if (len != 1 || *fbuf != '/')
1674                 *p++ = '/';
1675         *p = '\0';
1676         remainder = MAXPATHLEN - (p - fbuf);
1677
1678         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1679                 char *dname = d_name(di);
1680                 if (dname[0] == '.' && (dname[1] == '\0'
1681                     || (dname[1] == '.' && dname[2] == '\0')))
1682                         continue;
1683                 if (strlcpy(p, dname, remainder) >= remainder) {
1684                         io_error |= IOERR_GENERAL;
1685                         rprintf(FERROR_XFER,
1686                                 "cannot send long-named file %s\n",
1687                                 full_fname(fbuf));
1688                         continue;
1689                 }
1690                 if (dname[0] == '\0') {
1691                         io_error |= IOERR_GENERAL;
1692                         rprintf(FERROR_XFER,
1693                                 "cannot send file with empty name in %s\n",
1694                                 full_fname(fbuf));
1695                         continue;
1696                 }
1697
1698                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1699         }
1700
1701         fbuf[len] = '\0';
1702
1703         if (errno) {
1704                 io_error |= IOERR_GENERAL;
1705                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1706         }
1707
1708         closedir(d);
1709
1710         if (f >= 0 && recurse && !divert_dirs) {
1711                 int i, end = flist->used - 1;
1712                 /* send_if_directory() bumps flist->used, so use "end". */
1713                 for (i = start; i <= end; i++)
1714                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1715         }
1716 }
1717
1718 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1719                               char *start, char *limit, int flags, char name_type)
1720 {
1721         static char lastpath[MAXPATHLEN] = "";
1722         static int lastpath_len = 0;
1723         static struct file_struct *lastpath_struct = NULL;
1724         struct file_struct *file;
1725         item_list *relname_list;
1726         relnamecache **rnpp;
1727         int len, need_new_dir, depth = 0;
1728         struct filter_list_struct save_filter_list = filter_list;
1729
1730         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1731         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1732
1733         if (inc_recurse) {
1734                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1735                  && lastpath_len == limit - fname
1736                  && strncmp(lastpath, fname, lastpath_len) == 0)
1737                         need_new_dir = 0;
1738                 else
1739                         need_new_dir = 1;
1740         } else {
1741                 char *tp = fname, *lp = lastpath;
1742                 /* Skip any initial directories in our path that we
1743                  * have in common with lastpath. */
1744                 assert(start == fname);
1745                 for ( ; ; tp++, lp++) {
1746                         if (tp == limit) {
1747                                 if (*lp == '/' || *lp == '\0')
1748                                         goto done;
1749                                 break;
1750                         }
1751                         if (*lp != *tp)
1752                                 break;
1753                         if (*tp == '/') {
1754                                 start = tp;
1755                                 depth++;
1756                         }
1757                 }
1758                 need_new_dir = 1;
1759         }
1760
1761         if (need_new_dir) {
1762                 int save_copy_links = copy_links;
1763                 int save_xfer_dirs = xfer_dirs;
1764                 char *slash;
1765
1766                 copy_links = xfer_dirs = 1;
1767
1768                 *limit = '\0';
1769
1770                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1771                         *slash = '\0';
1772                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1773                         depth++;
1774                         if (!inc_recurse && file && S_ISDIR(file->mode))
1775                                 change_local_filter_dir(fname, strlen(fname), depth);
1776                         *slash = '/';
1777                 }
1778
1779                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1780                 if (inc_recurse) {
1781                         if (file && !S_ISDIR(file->mode))
1782                                 file = NULL;
1783                         lastpath_struct = file;
1784                 } else if (file && S_ISDIR(file->mode))
1785                         change_local_filter_dir(fname, strlen(fname), ++depth);
1786
1787                 strlcpy(lastpath, fname, sizeof lastpath);
1788                 lastpath_len = limit - fname;
1789
1790                 *limit = '/';
1791
1792                 copy_links = save_copy_links;
1793                 xfer_dirs = save_xfer_dirs;
1794
1795                 if (!inc_recurse)
1796                         goto done;
1797         }
1798
1799         if (!lastpath_struct)
1800                 goto done; /* dir must have vanished */
1801
1802         len = strlen(limit+1);
1803         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1804         if (!relname_list) {
1805                 if (!(relname_list = new0(item_list)))
1806                         out_of_memory("send_implied_dirs");
1807                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1808         }
1809         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1810         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1811                 out_of_memory("send_implied_dirs");
1812         (*rnpp)->name_type = name_type;
1813         strlcpy((*rnpp)->fname, limit+1, len + 1);
1814
1815 done:
1816         filter_list = save_filter_list;
1817 }
1818
1819 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1820 {
1821         char fbuf[MAXPATHLEN];
1822         item_list *relname_list;
1823         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1824         size_t j;
1825
1826         f_name(file, fbuf);
1827         dlen = strlen(fbuf);
1828
1829         if (!change_pathname(file, NULL, 0))
1830                 exit_cleanup(RERR_FILESELECT);
1831
1832         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1833
1834         if (file->flags & FLAG_CONTENT_DIR) {
1835                 if (one_file_system) {
1836                         STRUCT_STAT st;
1837                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1838                                 interpret_stat_error(fbuf, True);
1839                                 return;
1840                         }
1841                         filesystem_dev = st.st_dev;
1842                 }
1843                 send_directory(f, flist, fbuf, dlen, flags);
1844         }
1845
1846         if (!relative_paths)
1847                 return;
1848
1849         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1850         if (!relname_list)
1851                 return;
1852
1853         for (j = 0; j < relname_list->count; j++) {
1854                 char *slash;
1855                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1856                 char name_type = rnp->name_type;
1857
1858                 fbuf[dlen] = '/';
1859                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1860                 free(rnp);
1861                 if (len >= (int)sizeof fbuf)
1862                         continue; /* Impossible... */
1863
1864                 slash = strchr(fbuf+dlen+1, '/');
1865                 if (slash) {
1866                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1867                         continue;
1868                 }
1869
1870                 if (name_type != NORMAL_NAME) {
1871                         STRUCT_STAT st;
1872                         if (link_stat(fbuf, &st, 1) != 0) {
1873                                 interpret_stat_error(fbuf, True);
1874                                 continue;
1875                         }
1876                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1877                 } else
1878                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1879         }
1880
1881         free(relname_list);
1882 }
1883
1884 void send_extra_file_list(int f, int at_least)
1885 {
1886         struct file_list *flist;
1887         int64 start_write;
1888         uint16 prev_flags;
1889         int old_cnt, save_io_error = io_error;
1890
1891         if (flist_eof)
1892                 return;
1893
1894         /* Keep sending data until we have the requested number of
1895          * files in the upcoming file-lists. */
1896         old_cnt = cur_flist->used;
1897         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1898                 old_cnt += flist->used;
1899         while (file_total - old_cnt < at_least) {
1900                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1901                 int dir_ndx, dstart = stats.num_dirs;
1902                 const char *pathname = F_PATHNAME(file);
1903                 int32 *dp;
1904
1905                 flist = flist_new(0, "send_extra_file_list");
1906                 start_write = stats.total_written;
1907
1908                 if (unsort_ndx)
1909                         dir_ndx = F_NDX(file);
1910                 else
1911                         dir_ndx = send_dir_ndx;
1912                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1913                 flist->parent_ndx = dir_ndx;
1914
1915                 send1extra(f, file, flist);
1916                 prev_flags = file->flags;
1917                 dp = F_DIR_NODE_P(file);
1918
1919                 /* If there are any duplicate directory names that follow, we
1920                  * send all the dirs together in one file-list.  The dir_flist
1921                  * tree links all the child subdirs onto the last dup dir. */
1922                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1923                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1924                         send_dir_ndx = dir_ndx;
1925                         file = dir_flist->sorted[dir_ndx];
1926                         /* Try to avoid some duplicate scanning of identical dirs. */
1927                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1928                                 file->flags &= ~FLAG_CONTENT_DIR;
1929                         send1extra(f, file, flist);
1930                         prev_flags = file->flags;
1931                         dp = F_DIR_NODE_P(file);
1932                 }
1933
1934                 if (protocol_version < 31 || io_error == save_io_error || ignore_errors)
1935                         write_byte(f, 0);
1936                 else {
1937                         write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
1938                         write_varint(f, io_error);
1939                 }
1940
1941                 if (need_unsorted_flist) {
1942                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1943                                 out_of_memory("send_extra_file_list");
1944                         memcpy(flist->sorted, flist->files,
1945                                flist->used * sizeof (struct file_struct*));
1946                 } else
1947                         flist->sorted = flist->files;
1948
1949                 flist_sort_and_clean(flist, 0);
1950
1951                 add_dirs_to_tree(send_dir_ndx, flist, stats.num_dirs - dstart);
1952                 flist_done_allocating(flist);
1953
1954                 file_total += flist->used;
1955                 stats.flist_size += stats.total_written - start_write;
1956                 stats.num_files += flist->used;
1957                 if (DEBUG_GTE(FLIST, 3))
1958                         output_flist(flist);
1959
1960                 if (DIR_FIRST_CHILD(dp) >= 0) {
1961                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1962                         send_dir_depth++;
1963                 } else {
1964                         while (DIR_NEXT_SIBLING(dp) < 0) {
1965                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1966                                         write_ndx(f, NDX_FLIST_EOF);
1967                                         flist_eof = 1;
1968                                         change_local_filter_dir(NULL, 0, 0);
1969                                         goto finish;
1970                                 }
1971                                 send_dir_depth--;
1972                                 file = dir_flist->sorted[send_dir_ndx];
1973                                 dp = F_DIR_NODE_P(file);
1974                         }
1975                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1976                 }
1977         }
1978
1979   finish:
1980         if (io_error != save_io_error && protocol_version == 30 && !ignore_errors)
1981                 send_msg_int(MSG_IO_ERROR, io_error);
1982 }
1983
1984 struct file_list *send_file_list(int f, int argc, char *argv[])
1985 {
1986         static const char *lastdir;
1987         static int lastdir_len = -1;
1988         int len, dirlen;
1989         STRUCT_STAT st;
1990         char *p, *dir;
1991         struct file_list *flist;
1992         struct timeval start_tv, end_tv;
1993         int64 start_write;
1994         int use_ff_fd = 0;
1995         int disable_buffering;
1996         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1997         int reading_remotely = filesfrom_host != NULL;
1998         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1999 #ifdef ICONV_OPTION
2000                      | (filesfrom_convert ? RL_CONVERT : 0)
2001 #endif
2002                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
2003         int implied_dot_dir = 0;
2004
2005         rprintf(FLOG, "building file list\n");
2006         if (show_filelist_p())
2007                 start_filelist_progress("building file list");
2008         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2009                 rprintf(FCLIENT, "sending incremental file list\n");
2010
2011         start_write = stats.total_written;
2012         gettimeofday(&start_tv, NULL);
2013
2014         if (relative_paths && protocol_version >= 30)
2015                 implied_dirs = 1; /* We send flagged implied dirs */
2016
2017 #ifdef SUPPORT_HARD_LINKS
2018         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
2019                 init_hard_links();
2020 #endif
2021
2022         flist = cur_flist = flist_new(0, "send_file_list");
2023         if (inc_recurse) {
2024                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
2025                 flags |= FLAG_DIVERT_DIRS;
2026         } else
2027                 dir_flist = cur_flist;
2028
2029         disable_buffering = io_start_buffering_out(f);
2030         if (filesfrom_fd >= 0) {
2031                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
2032                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
2033                                 full_fname(argv[0]));
2034                         exit_cleanup(RERR_FILESELECT);
2035                 }
2036                 use_ff_fd = 1;
2037         }
2038
2039         if (!orig_dir)
2040                 orig_dir = strdup(curr_dir);
2041
2042         while (1) {
2043                 char fbuf[MAXPATHLEN], *fn, name_type;
2044
2045                 if (use_ff_fd) {
2046                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
2047                                 break;
2048                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2049                 } else {
2050                         if (argc-- == 0)
2051                                 break;
2052                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2053                         if (sanitize_paths)
2054                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2055                 }
2056
2057                 len = strlen(fbuf);
2058                 if (relative_paths) {
2059                         /* We clean up fbuf below. */
2060                         name_type = NORMAL_NAME;
2061                 } else if (!len || fbuf[len - 1] == '/') {
2062                         if (len == 2 && fbuf[0] == '.') {
2063                                 /* Turn "./" into just "." rather than "./." */
2064                                 fbuf[--len] = '\0';
2065                         } else {
2066                                 if (len + 1 >= MAXPATHLEN)
2067                                         overflow_exit("send_file_list");
2068                                 fbuf[len++] = '.';
2069                                 fbuf[len] = '\0';
2070                         }
2071                         name_type = DOTDIR_NAME;
2072                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2073                     && (len == 2 || fbuf[len-3] == '/')) {
2074                         if (len + 2 >= MAXPATHLEN)
2075                                 overflow_exit("send_file_list");
2076                         fbuf[len++] = '/';
2077                         fbuf[len++] = '.';
2078                         fbuf[len] = '\0';
2079                         name_type = DOTDIR_NAME;
2080                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2081                         name_type = DOTDIR_NAME;
2082                 else
2083                         name_type = NORMAL_NAME;
2084
2085                 dir = NULL;
2086
2087                 if (!relative_paths) {
2088                         p = strrchr(fbuf, '/');
2089                         if (p) {
2090                                 *p = '\0';
2091                                 if (p == fbuf)
2092                                         dir = "/";
2093                                 else
2094                                         dir = fbuf;
2095                                 len -= p - fbuf + 1;
2096                                 fn = p + 1;
2097                         } else
2098                                 fn = fbuf;
2099                 } else {
2100                         if ((p = strstr(fbuf, "/./")) != NULL) {
2101                                 *p = '\0';
2102                                 if (p == fbuf)
2103                                         dir = "/";
2104                                 else {
2105                                         dir = fbuf;
2106                                         clean_fname(dir, 0);
2107                                 }
2108                                 fn = p + 3;
2109                                 while (*fn == '/')
2110                                         fn++;
2111                                 if (!*fn)
2112                                         *--fn = '\0'; /* ensure room for '.' */
2113                         } else
2114                                 fn = fbuf;
2115                         /* A leading ./ can be used in relative mode to affect
2116                          * the dest dir without its name being in the path. */
2117                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2118                                 send_file_name(f, flist, ".", NULL,
2119                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2120                                     ALL_FILTERS);
2121                                 implied_dot_dir = 1;
2122                         }
2123                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2124                                             | CFN_DROP_TRAILING_DOT_DIR);
2125                         if (len == 1) {
2126                                 if (fn[0] == '/') {
2127                                         fn = "/.";
2128                                         len = 2;
2129                                         name_type = DOTDIR_NAME;
2130                                 } else if (fn[0] == '.')
2131                                         name_type = DOTDIR_NAME;
2132                         } else if (fn[len-1] == '/') {
2133                                 fn[--len] = '\0';
2134                                 if (len == 1 && *fn == '.')
2135                                         name_type = DOTDIR_NAME;
2136                                 else
2137                                         name_type = SLASH_ENDING_NAME;
2138                         }
2139                         /* Reject a ".." dir in the active part of the path. */
2140                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2141                                 if ((p[2] == '/' || p[2] == '\0')
2142                                  && (p == fn || p[-1] == '/')) {
2143                                         rprintf(FERROR,
2144                                             "found \"..\" dir in relative path: %s\n",
2145                                             fn);
2146                                         exit_cleanup(RERR_SYNTAX);
2147                                 }
2148                         }
2149                 }
2150
2151                 if (!*fn) {
2152                         len = 1;
2153                         fn = ".";
2154                         name_type = DOTDIR_NAME;
2155                 }
2156
2157                 dirlen = dir ? strlen(dir) : 0;
2158                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2159                         if (!change_pathname(NULL, dir, -dirlen))
2160                                 continue;
2161                         lastdir = pathname;
2162                         lastdir_len = pathname_len;
2163                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2164                         continue;
2165
2166                 if (fn != fbuf)
2167                         memmove(fbuf, fn, len + 1);
2168
2169                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2170                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2171                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2172                         io_error |= IOERR_GENERAL;
2173                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2174                                 full_fname(fbuf));
2175                         continue;
2176                 }
2177
2178                 /* A dot-dir should not be excluded! */
2179                 if (name_type != DOTDIR_NAME
2180                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2181                         continue;
2182
2183                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2184                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2185                         continue;
2186                 }
2187
2188                 if (inc_recurse && relative_paths && *fbuf) {
2189                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2190                                 if (p - fbuf == 1 && *fbuf == '.') {
2191                                         if ((fn = strchr(p+1, '/')) != NULL)
2192                                                 p = fn;
2193                                 } else
2194                                         fn = p;
2195                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2196                                 if (fn == p)
2197                                         continue;
2198                         }
2199                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2200                         /* Send the implied directories at the start of the
2201                          * source spec, so we get their permissions right. */
2202                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2203                 }
2204
2205                 if (one_file_system)
2206                         filesystem_dev = st.st_dev;
2207
2208                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2209                         struct file_struct *file;
2210                         file = send_file_name(f, flist, fbuf, &st,
2211                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2212                                               NO_FILTERS);
2213                         if (!file)
2214                                 continue;
2215                         if (inc_recurse) {
2216                                 if (name_type == DOTDIR_NAME) {
2217                                         if (send_dir_depth < 0) {
2218                                                 send_dir_depth = 0;
2219                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2220                                         }
2221                                         send_directory(f, flist, fbuf, len, flags);
2222                                 }
2223                         } else
2224                                 send_if_directory(f, flist, file, fbuf, len, flags);
2225                 } else
2226                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2227         }
2228
2229         gettimeofday(&end_tv, NULL);
2230         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2231                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2232         if (stats.flist_buildtime == 0)
2233                 stats.flist_buildtime = 1;
2234         start_tv = end_tv;
2235
2236         /* Indicate end of file list */
2237         if (protocol_version < 31 || io_error == 0 || ignore_errors)
2238                 write_byte(f, 0);
2239         else {
2240                 write_shortint(f, XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST);
2241                 write_varint(f, io_error);
2242         }
2243
2244 #ifdef SUPPORT_HARD_LINKS
2245         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2246                 idev_destroy();
2247 #endif
2248
2249         if (show_filelist_p())
2250                 finish_filelist_progress(flist);
2251
2252         gettimeofday(&end_tv, NULL);
2253         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2254                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2255
2256         /* When converting names, both sides keep an unsorted file-list array
2257          * because the names will differ on the sending and receiving sides
2258          * (both sides will use the unsorted index number for each item). */
2259
2260         /* Sort the list without removing any duplicates.  This allows the
2261          * receiving side to ask for whatever name it kept.  For incremental
2262          * recursion mode, the sender marks duplicate dirs so that it can
2263          * send them together in a single file-list. */
2264         if (need_unsorted_flist) {
2265                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2266                         out_of_memory("send_file_list");
2267                 memcpy(flist->sorted, flist->files,
2268                        flist->used * sizeof (struct file_struct*));
2269         } else
2270                 flist->sorted = flist->files;
2271         flist_sort_and_clean(flist, 0);
2272         file_total += flist->used;
2273
2274         if (numeric_ids <= 0 && !inc_recurse)
2275                 send_id_list(f);
2276
2277         set_msg_fd_in(-1);
2278
2279         /* send the io_error flag */
2280         if (protocol_version < 30)
2281                 write_int(f, ignore_errors ? 0 : io_error);
2282         else if (io_error && protocol_version == 30 && !ignore_errors)
2283                 send_msg_int(MSG_IO_ERROR, io_error);
2284
2285         if (disable_buffering)
2286                 io_end_buffering_out();
2287
2288         stats.flist_size = stats.total_written - start_write;
2289         stats.num_files = flist->used;
2290
2291         if (DEBUG_GTE(FLIST, 3))
2292                 output_flist(flist);
2293
2294         if (DEBUG_GTE(FLIST, 2))
2295                 rprintf(FINFO, "send_file_list done\n");
2296
2297         if (inc_recurse) {
2298                 send_dir_depth = 1;
2299                 add_dirs_to_tree(-1, flist, stats.num_dirs);
2300                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2301                         flist->parent_ndx = -1;
2302                 flist_done_allocating(flist);
2303                 if (send_dir_ndx < 0) {
2304                         write_ndx(f, NDX_FLIST_EOF);
2305                         flist_eof = 1;
2306                 }
2307                 else if (file_total == 1) {
2308                         /* If we're creating incremental file-lists and there
2309                          * was just 1 item in the first file-list, send 1 more
2310                          * file-list to check if this is a 1-file xfer. */
2311                         send_extra_file_list(f, 1);
2312                 }
2313         }
2314
2315         return flist;
2316 }
2317
2318 struct file_list *recv_file_list(int f)
2319 {
2320         struct file_list *flist;
2321         int dstart, flags;
2322         int64 start_read;
2323
2324         if (!first_flist) {
2325                 if (show_filelist_p())
2326                         start_filelist_progress("receiving file list");
2327                 else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2328                         rprintf(FCLIENT, "receiving incremental file list\n");
2329                 rprintf(FLOG, "receiving file list\n");
2330                 if (usermap)
2331                         parse_name_map(usermap, True);
2332                 if (groupmap)
2333                         parse_name_map(groupmap, False);
2334         }
2335
2336         start_read = stats.total_read;
2337
2338 #ifdef SUPPORT_HARD_LINKS
2339         if (preserve_hard_links && !first_flist)
2340                 init_hard_links();
2341 #endif
2342
2343         flist = flist_new(0, "recv_file_list");
2344
2345         if (inc_recurse) {
2346                 if (flist->ndx_start == 1)
2347                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2348                 dstart = dir_flist->used;
2349         } else {
2350                 dir_flist = flist;
2351                 dstart = 0;
2352         }
2353
2354         while ((flags = read_byte(f)) != 0) {
2355                 struct file_struct *file;
2356
2357                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2358                         flags |= read_byte(f) << 8;
2359
2360                 if (flags == (XMIT_EXTENDED_FLAGS|XMIT_IO_ERROR_ENDLIST)) {
2361                         int err;
2362                         if (protocol_version < 31) {
2363                                 rprintf(FERROR, "Invalid flist flag: %x\n", flags);
2364                                 exit_cleanup(RERR_PROTOCOL);
2365                         }
2366                         err = read_varint(f);
2367                         if (!ignore_errors)
2368                                 io_error |= err;
2369                         break;
2370                 }
2371
2372                 flist_expand(flist, 1);
2373                 file = recv_file_entry(flist, flags, f);
2374
2375                 if (S_ISREG(file->mode)) {
2376                         /* Already counted */
2377                 } else if (S_ISDIR(file->mode)) {
2378                         if (inc_recurse) {
2379                                 flist_expand(dir_flist, 1);
2380                                 dir_flist->files[dir_flist->used++] = file;
2381                         }
2382                         stats.num_dirs++;
2383                 } else if (S_ISLNK(file->mode))
2384                         stats.num_symlinks++;
2385                 else if (IS_DEVICE(file->mode))
2386                         stats.num_symlinks++;
2387                 else
2388                         stats.num_specials++;
2389
2390                 flist->files[flist->used++] = file;
2391
2392                 maybe_emit_filelist_progress(flist->used);
2393
2394                 if (DEBUG_GTE(FLIST, 2)) {
2395                         char *name = f_name(file, NULL);
2396                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2397                 }
2398         }
2399         file_total += flist->used;
2400
2401         if (DEBUG_GTE(FLIST, 2))
2402                 rprintf(FINFO, "received %d names\n", flist->used);
2403
2404         if (show_filelist_p())
2405                 finish_filelist_progress(flist);
2406
2407         if (need_unsorted_flist) {
2408                 /* Create an extra array of index pointers that we can sort for
2409                  * the generator's use (for wading through the files in sorted
2410                  * order and for calling flist_find()).  We keep the "files"
2411                  * list unsorted for our exchange of index numbers with the
2412                  * other side (since their names may not sort the same). */
2413                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2414                         out_of_memory("recv_file_list");
2415                 memcpy(flist->sorted, flist->files,
2416                        flist->used * sizeof (struct file_struct*));
2417                 if (inc_recurse && dir_flist->used > dstart) {
2418                         static int dir_flist_malloced = 0;
2419                         if (dir_flist_malloced < dir_flist->malloced) {
2420                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2421                                                         struct file_struct *,
2422                                                         dir_flist->malloced);
2423                                 dir_flist_malloced = dir_flist->malloced;
2424                         }
2425                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2426                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2427                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2428                 }
2429         } else {
2430                 flist->sorted = flist->files;
2431                 if (inc_recurse && dir_flist->used > dstart) {
2432                         dir_flist->sorted = dir_flist->files;
2433                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2434                 }
2435         }
2436
2437         if (inc_recurse)
2438                 flist_done_allocating(flist);
2439         else if (f >= 0)
2440                 recv_id_list(f, flist);
2441
2442         flist_sort_and_clean(flist, relative_paths);
2443
2444         if (protocol_version < 30) {
2445                 /* Recv the io_error flag */
2446                 int err = read_int(f);
2447                 if (!ignore_errors)
2448                         io_error |= err;
2449         } else if (inc_recurse && flist->ndx_start == 1) {
2450                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2451                         flist->parent_ndx = -1;
2452         }
2453
2454         if (DEBUG_GTE(FLIST, 3))
2455                 output_flist(flist);
2456
2457         if (DEBUG_GTE(FLIST, 2))
2458                 rprintf(FINFO, "recv_file_list done\n");
2459
2460         stats.flist_size += stats.total_read - start_read;
2461         stats.num_files += flist->used;
2462
2463         return flist;
2464 }
2465
2466 /* This is only used once by the receiver if the very first file-list
2467  * has exactly one item in it. */
2468 void recv_additional_file_list(int f)
2469 {
2470         struct file_list *flist;
2471         int ndx = read_ndx(f);
2472         if (ndx == NDX_FLIST_EOF) {
2473                 flist_eof = 1;
2474                 change_local_filter_dir(NULL, 0, 0);
2475         } else {
2476                 ndx = NDX_FLIST_OFFSET - ndx;
2477                 if (ndx < 0 || ndx >= dir_flist->used) {
2478                         ndx = NDX_FLIST_OFFSET - ndx;
2479                         rprintf(FERROR,
2480                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2481                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2482                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2483                         exit_cleanup(RERR_PROTOCOL);
2484                 }
2485                 if (DEBUG_GTE(FLIST, 3)) {
2486                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2487                                 who_am_i(), ndx);
2488                 }
2489                 flist = recv_file_list(f);
2490                 flist->parent_ndx = ndx;
2491         }
2492 }
2493
2494 /* Search for an identically-named item in the file list.  Note that the
2495  * items must agree in their directory-ness, or no match is returned. */
2496 int flist_find(struct file_list *flist, struct file_struct *f)
2497 {
2498         int low = flist->low, high = flist->high;
2499         int diff, mid, mid_up;
2500
2501         while (low <= high) {
2502                 mid = (low + high) / 2;
2503                 if (F_IS_ACTIVE(flist->sorted[mid]))
2504                         mid_up = mid;
2505                 else {
2506                         /* Scan for the next non-empty entry using the cached
2507                          * distance values.  If the value isn't fully up-to-
2508                          * date, update it. */
2509                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2510                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2511                                 do {
2512                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2513                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2514                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2515                         }
2516                         if (mid_up > high) {
2517                                 /* If there's nothing left above us, set high to
2518                                  * a non-empty entry below us and continue. */
2519                                 high = mid - (int)flist->sorted[mid]->len32;
2520                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2521                                         do {
2522                                             high -= (int)flist->sorted[high]->len32;
2523                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2524                                         flist->sorted[mid]->len32 = mid - high;
2525                                 }
2526                                 continue;
2527                         }
2528                 }
2529                 diff = f_name_cmp(flist->sorted[mid_up], f);
2530                 if (diff == 0) {
2531                         if (protocol_version < 29
2532                             && S_ISDIR(flist->sorted[mid_up]->mode)
2533                             != S_ISDIR(f->mode))
2534                                 return -1;
2535                         return mid_up;
2536                 }
2537                 if (diff < 0)
2538                         low = mid_up + 1;
2539                 else
2540                         high = mid - 1;
2541         }
2542         return -1;
2543 }
2544
2545 /* Search for an identically-named item in the file list.  Differs from
2546  * flist_find in that an item that agrees with "f" in directory-ness is
2547  * preferred but one that does not is still found. */
2548 int flist_find_ignore_dirness(struct file_list *flist, struct file_struct *f)
2549 {
2550         mode_t save_mode;
2551         int ndx;
2552
2553         /* First look for an item that agrees in directory-ness. */
2554         ndx = flist_find(flist, f);
2555         if (ndx >= 0)
2556                 return ndx;
2557
2558         /* Temporarily flip f->mode to look for an item of opposite
2559          * directory-ness. */
2560         save_mode = f->mode;
2561         f->mode = S_ISDIR(f->mode) ? S_IFREG : S_IFDIR;
2562         ndx = flist_find(flist, f);
2563         f->mode = save_mode;
2564         return ndx;
2565 }
2566
2567 /*
2568  * Free up any resources a file_struct has allocated
2569  * and clear the file.
2570  */
2571 void clear_file(struct file_struct *file)
2572 {
2573         /* The +1 zeros out the first char of the basename. */
2574         memset(file, 0, FILE_STRUCT_LEN + 1);
2575         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2576          * entry.  Likewise for len32 in the opposite direction.  We assume
2577          * that we're alone for now since flist_find() will adjust the counts
2578          * it runs into that aren't up-to-date. */
2579         file->len32 = F_DEPTH(file) = 1;
2580 }
2581
2582 /* Allocate a new file list. */
2583 struct file_list *flist_new(int flags, char *msg)
2584 {
2585         struct file_list *flist;
2586
2587         if (!(flist = new0(struct file_list)))
2588                 out_of_memory(msg);
2589
2590         if (flags & FLIST_TEMP) {
2591                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2592                                                      out_of_memory,
2593                                                      POOL_INTERN)))
2594                         out_of_memory(msg);
2595         } else {
2596                 /* This is a doubly linked list with prev looping back to
2597                  * the end of the list, but the last next pointer is NULL. */
2598                 if (!first_flist) {
2599                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2600                                                        out_of_memory,
2601                                                        POOL_INTERN);
2602                         if (!flist->file_pool)
2603                                 out_of_memory(msg);
2604
2605                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2606
2607                         first_flist = cur_flist = flist->prev = flist;
2608                 } else {
2609                         struct file_list *prev = first_flist->prev;
2610
2611                         flist->file_pool = first_flist->file_pool;
2612
2613                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2614                         flist->flist_num = prev->flist_num + 1;
2615
2616                         flist->prev = prev;
2617                         prev->next = first_flist->prev = flist;
2618                 }
2619                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2620                 flist_cnt++;
2621         }
2622
2623         return flist;
2624 }
2625
2626 /* Free up all elements in a flist. */
2627 void flist_free(struct file_list *flist)
2628 {
2629         if (!flist->prev) {
2630                 /* Was FLIST_TEMP dir-list. */
2631         } else if (flist == flist->prev) {
2632                 first_flist = cur_flist = NULL;
2633                 file_total = 0;
2634                 flist_cnt = 0;
2635         } else {
2636                 if (flist == cur_flist)
2637                         cur_flist = flist->next;
2638                 if (flist == first_flist)
2639                         first_flist = first_flist->next;
2640                 else {
2641                         flist->prev->next = flist->next;
2642                         if (!flist->next)
2643                                 flist->next = first_flist;
2644                 }
2645                 flist->next->prev = flist->prev;
2646                 file_total -= flist->used;
2647                 flist_cnt--;
2648         }
2649
2650         if (!flist->prev || !flist_cnt)
2651                 pool_destroy(flist->file_pool);
2652         else
2653                 pool_free_old(flist->file_pool, flist->pool_boundary);
2654
2655         if (flist->sorted && flist->sorted != flist->files)
2656                 free(flist->sorted);
2657         free(flist->files);
2658         free(flist);
2659 }
2660
2661 /* This routine ensures we don't have any duplicate names in our file list.
2662  * duplicate names can cause corruption because of the pipelining. */
2663 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2664 {
2665         char fbuf[MAXPATHLEN];
2666         int i, prev_i;
2667
2668         if (!flist)
2669                 return;
2670         if (flist->used == 0) {
2671                 flist->high = -1;
2672                 flist->low = 0;
2673                 return;
2674         }
2675
2676         fsort(flist->sorted, flist->used);
2677
2678         if (!am_sender || inc_recurse) {
2679                 for (i = prev_i = 0; i < flist->used; i++) {
2680                         if (F_IS_ACTIVE(flist->sorted[i])) {
2681                                 prev_i = i;
2682                                 break;
2683                         }
2684                 }
2685                 flist->low = prev_i;
2686         } else {
2687                 i = prev_i = flist->used - 1;
2688                 flist->low = 0;
2689         }
2690
2691         while (++i < flist->used) {
2692                 int j;
2693                 struct file_struct *file = flist->sorted[i];
2694
2695                 if (!F_IS_ACTIVE(file))
2696                         continue;
2697                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2698                         j = prev_i;
2699                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2700                         int save_mode = file->mode;
2701                         /* Make sure that this directory doesn't duplicate a
2702                          * non-directory earlier in the list. */
2703                         flist->high = prev_i;
2704                         file->mode = S_IFREG;
2705                         j = flist_find(flist, file);
2706                         file->mode = save_mode;
2707                 } else
2708                         j = -1;
2709                 if (j >= 0) {
2710                         int keep, drop;
2711                         /* If one is a dir and the other is not, we want to
2712                          * keep the dir because it might have contents in the
2713                          * list.  Otherwise keep the first one. */
2714                         if (S_ISDIR(file->mode)) {
2715                                 struct file_struct *fp = flist->sorted[j];
2716                                 if (!S_ISDIR(fp->mode))
2717                                         keep = i, drop = j;
2718                                 else {
2719                                         if (am_sender)
2720                                                 file->flags |= FLAG_DUPLICATE;
2721                                         else { /* Make sure we merge our vital flags. */
2722                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2723                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2724                                         }
2725                                         keep = j, drop = i;
2726                                 }
2727                         } else
2728                                 keep = j, drop = i;
2729
2730                         if (!am_sender) {
2731                                 if (DEBUG_GTE(DUP, 1)) {
2732                                         rprintf(FINFO,
2733                                             "removing duplicate name %s from file list (%d)\n",
2734                                             f_name(file, fbuf), drop + flist->ndx_start);
2735                                 }
2736                                 clear_file(flist->sorted[drop]);
2737                         }
2738
2739                         if (keep == i) {
2740                                 if (flist->low == drop) {
2741                                         for (j = drop + 1;
2742                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2743                                              j++) {}
2744                                         flist->low = j;
2745                                 }
2746                                 prev_i = i;
2747                         }
2748                 } else
2749                         prev_i = i;
2750         }
2751         flist->high = prev_i;
2752
2753         if (strip_root) {
2754                 /* We need to strip off the leading slashes for relative
2755                  * paths, but this must be done _after_ the sorting phase. */
2756                 for (i = flist->low; i <= flist->high; i++) {
2757                         struct file_struct *file = flist->sorted[i];
2758
2759                         if (!file->dirname)
2760                                 continue;
2761                         while (*file->dirname == '/')
2762                                 file->dirname++;
2763                         if (!*file->dirname)
2764                                 file->dirname = NULL;
2765                 }
2766         }
2767
2768         if (prune_empty_dirs && !am_sender) {
2769                 int j, prev_depth = 0;
2770
2771                 prev_i = 0; /* It's OK that this isn't really true. */
2772
2773                 for (i = flist->low; i <= flist->high; i++) {
2774                         struct file_struct *fp, *file = flist->sorted[i];
2775
2776                         /* This temporarily abuses the F_DEPTH() value for a
2777                          * directory that is in a chain that might get pruned.
2778                          * We restore the old value if it gets a reprieve. */
2779                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2780                                 /* Dump empty dirs when coming back down. */
2781                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2782                                         fp = flist->sorted[prev_i];
2783                                         if (F_DEPTH(fp) >= 0)
2784                                                 break;
2785                                         prev_i = -F_DEPTH(fp)-1;
2786                                         clear_file(fp);
2787                                 }
2788                                 prev_depth = F_DEPTH(file);
2789                                 if (is_excluded(f_name(file, fbuf), 1,
2790                                                        ALL_FILTERS)) {
2791                                         /* Keep dirs through this dir. */
2792                                         for (j = prev_depth-1; ; j--) {
2793                                                 fp = flist->sorted[prev_i];
2794                                                 if (F_DEPTH(fp) >= 0)
2795                                                         break;
2796                                                 prev_i = -F_DEPTH(fp)-1;
2797                                                 F_DEPTH(fp) = j;
2798                                         }
2799                                 } else
2800                                         F_DEPTH(file) = -prev_i-1;
2801                                 prev_i = i;
2802                         } else {
2803                                 /* Keep dirs through this non-dir. */
2804                                 for (j = prev_depth; ; j--) {
2805                                         fp = flist->sorted[prev_i];
2806                                         if (F_DEPTH(fp) >= 0)
2807                                                 break;
2808                                         prev_i = -F_DEPTH(fp)-1;
2809                                         F_DEPTH(fp) = j;
2810                                 }
2811                         }
2812                 }
2813                 /* Dump all remaining empty dirs. */
2814                 while (1) {
2815                         struct file_struct *fp = flist->sorted[prev_i];
2816                         if (F_DEPTH(fp) >= 0)
2817                                 break;
2818                         prev_i = -F_DEPTH(fp)-1;
2819                         clear_file(fp);
2820                 }
2821
2822                 for (i = flist->low; i <= flist->high; i++) {
2823                         if (F_IS_ACTIVE(flist->sorted[i]))
2824                                 break;
2825                 }
2826                 flist->low = i;
2827                 for (i = flist->high; i >= flist->low; i--) {
2828                         if (F_IS_ACTIVE(flist->sorted[i]))
2829                                 break;
2830                 }
2831                 flist->high = i;
2832         }
2833 }
2834
2835 static void output_flist(struct file_list *flist)
2836 {
2837         char uidbuf[16], gidbuf[16], depthbuf[16];
2838         struct file_struct *file;
2839         const char *root, *dir, *slash, *name, *trail;
2840         const char *who = who_am_i();
2841         int i;
2842
2843         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2844                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2845         for (i = 0; i < flist->used; i++) {
2846                 file = flist->files[i];
2847                 if ((am_root || am_sender) && uid_ndx) {
2848                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2849                                  F_OWNER(file));
2850                 } else
2851                         *uidbuf = '\0';
2852                 if (gid_ndx) {
2853                         static char parens[] = "(\0)\0\0\0";
2854                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2855                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2856                                  pp, F_GROUP(file), pp + 2);
2857                 } else
2858                         *gidbuf = '\0';
2859                 if (!am_sender)
2860                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2861                 if (F_IS_ACTIVE(file)) {
2862                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2863                         if ((dir = file->dirname) == NULL)
2864                                 dir = slash = "";
2865                         else
2866                                 slash = "/";
2867                         name = file->basename;
2868                         trail = S_ISDIR(file->mode) ? "/" : "";
2869                 } else
2870                         root = dir = slash = name = trail = "";
2871                 rprintf(FINFO,
2872                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n",
2873                         who, i + flist->ndx_start,
2874                         root, dir, slash, name, trail,
2875                         (int)file->mode, comma_num(F_LENGTH(file)),
2876                         uidbuf, gidbuf, file->flags);
2877         }
2878 }
2879
2880 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2881 enum fnc_type { t_PATH, t_ITEM };
2882
2883 static int found_prefix;
2884
2885 /* Compare the names of two file_struct entities, similar to how strcmp()
2886  * would do if it were operating on the joined strings.
2887  *
2888  * Some differences beginning with protocol_version 29: (1) directory names
2889  * are compared with an assumed trailing slash so that they compare in a
2890  * way that would cause them to sort immediately prior to any content they
2891  * may have; (2) a directory of any name compares after a non-directory of
2892  * any name at the same depth; (3) a directory with name "." compares prior
2893  * to anything else.  These changes mean that a directory and a non-dir
2894  * with the same name will not compare as equal (protocol_version >= 29).
2895  *
2896  * The dirname component can be an empty string, but the basename component
2897  * cannot (and never is in the current codebase).  The basename component
2898  * may be NULL (for a removed item), in which case it is considered to be
2899  * after any existing item. */
2900 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2901 {
2902         int dif;
2903         const uchar *c1, *c2;
2904         enum fnc_state state1, state2;
2905         enum fnc_type type1, type2;
2906         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2907
2908         if (!f1 || !F_IS_ACTIVE(f1)) {
2909                 if (!f2 || !F_IS_ACTIVE(f2))
2910                         return 0;
2911                 return -1;
2912         }
2913         if (!f2 || !F_IS_ACTIVE(f2))
2914                 return 1;
2915
2916         c1 = (uchar*)f1->dirname;
2917         c2 = (uchar*)f2->dirname;
2918         if (c1 == c2)
2919                 c1 = c2 = NULL;
2920         if (!c1) {
2921                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2922                 c1 = (const uchar*)f1->basename;
2923                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2924                         type1 = t_ITEM;
2925                         state1 = s_TRAILING;
2926                         c1 = (uchar*)"";
2927                 } else
2928                         state1 = s_BASE;
2929         } else {
2930                 type1 = t_path;
2931                 state1 = s_DIR;
2932         }
2933         if (!c2) {
2934                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2935                 c2 = (const uchar*)f2->basename;
2936                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2937                         type2 = t_ITEM;
2938                         state2 = s_TRAILING;
2939                         c2 = (uchar*)"";
2940                 } else
2941                         state2 = s_BASE;
2942         } else {
2943                 type2 = t_path;
2944                 state2 = s_DIR;
2945         }
2946
2947         if (type1 != type2)
2948                 return type1 == t_PATH ? 1 : -1;
2949
2950         do {
2951                 if (!*c1) {
2952                         switch (state1) {
2953                         case s_DIR:
2954                                 state1 = s_SLASH;
2955                                 c1 = (uchar*)"/";
2956                                 break;
2957                         case s_SLASH:
2958                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2959                                 c1 = (const uchar*)f1->basename;
2960                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2961                                         type1 = t_ITEM;
2962                                         state1 = s_TRAILING;
2963                                         c1 = (uchar*)"";
2964                                 } else
2965                                         state1 = s_BASE;
2966                                 break;
2967                         case s_BASE:
2968                                 state1 = s_TRAILING;
2969                                 if (type1 == t_PATH) {
2970                                         c1 = (uchar*)"/";
2971                                         break;
2972                                 }
2973                                 /* FALL THROUGH */
2974                         case s_TRAILING:
2975                                 type1 = t_ITEM;
2976                                 break;
2977                         }
2978                         if (*c2 && type1 != type2)
2979                                 return type1 == t_PATH ? 1 : -1;
2980                 }
2981                 if (!*c2) {
2982                         switch (state2) {
2983                         case s_DIR:
2984                                 state2 = s_SLASH;
2985                                 c2 = (uchar*)"/";
2986                                 break;
2987                         case s_SLASH:
2988                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2989                                 c2 = (const uchar*)f2->basename;
2990                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2991                                         type2 = t_ITEM;
2992                                         state2 = s_TRAILING;
2993                                         c2 = (uchar*)"";
2994                                 } else
2995                                         state2 = s_BASE;
2996                                 break;
2997                         case s_BASE:
2998                                 state2 = s_TRAILING;
2999                                 if (type2 == t_PATH) {
3000                                         c2 = (uchar*)"/";
3001                                         break;
3002                                 }
3003                                 /* FALL THROUGH */
3004                         case s_TRAILING:
3005                                 found_prefix = 1;
3006                                 if (!*c1)
3007                                         return 0;
3008                                 type2 = t_ITEM;
3009                                 break;
3010                         }
3011                         if (type1 != type2)
3012                                 return type1 == t_PATH ? 1 : -1;
3013                 }
3014         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
3015
3016         return dif;
3017 }
3018
3019 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
3020  * not match if f2's basename is not an exact match of a path element in f1.
3021  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
3022 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
3023 {
3024         found_prefix = 0;
3025         f_name_cmp(f1, f2);
3026         return found_prefix;
3027 }
3028
3029 char *f_name_buf(void)
3030 {
3031         static char names[5][MAXPATHLEN];
3032         static unsigned int n;
3033
3034         n = (n + 1) % (sizeof names / sizeof names[0]);
3035
3036         return names[n];
3037 }
3038
3039 /* Return a copy of the full filename of a flist entry, using the indicated
3040  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
3041  * done because we checked the size when creating the file_struct entry.
3042  */
3043 char *f_name(const struct file_struct *f, char *fbuf)
3044 {
3045         if (!f || !F_IS_ACTIVE(f))
3046                 return NULL;
3047
3048         if (!fbuf)
3049                 fbuf = f_name_buf();
3050
3051         if (f->dirname) {
3052                 int len = strlen(f->dirname);
3053                 memcpy(fbuf, f->dirname, len);
3054                 fbuf[len] = '/';
3055                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
3056         } else
3057                 strlcpy(fbuf, f->basename, MAXPATHLEN);
3058
3059         return fbuf;
3060 }
3061
3062 /* Do a non-recursive scan of the named directory, possibly ignoring all
3063  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
3064  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
3065  * buffer (the functions we call will append names onto the end, but the old
3066  * dir value will be restored on exit). */
3067 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
3068 {
3069         struct file_list *dirlist;
3070         char dirbuf[MAXPATHLEN];
3071         int save_recurse = recurse;
3072         int save_xfer_dirs = xfer_dirs;
3073         int save_prune_empty_dirs = prune_empty_dirs;
3074
3075         if (dlen < 0) {
3076                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
3077                 if (dlen >= MAXPATHLEN)
3078                         return NULL;
3079                 dirname = dirbuf;
3080         }
3081
3082         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
3083
3084         recurse = 0;
3085         xfer_dirs = 1;
3086         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
3087         xfer_dirs = save_xfer_dirs;
3088         recurse = save_recurse;
3089         if (INFO_GTE(PROGRESS, 1))
3090                 flist_count_offset += dirlist->used;
3091
3092         prune_empty_dirs = 0;
3093         dirlist->sorted = dirlist->files;
3094         flist_sort_and_clean(dirlist, 0);
3095         prune_empty_dirs = save_prune_empty_dirs;
3096
3097         if (DEBUG_GTE(FLIST, 3))
3098                 output_flist(dirlist);
3099
3100         return dirlist;
3101 }