flist.c

   1 /*
   2  * Generate and receive file lists.
   3  *
   4  * Copyright (C) 1996 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2002-2008 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "ifuncs.h"
  25 #include "rounding.h"
  26 #include "io.h"
  27
  28 extern int verbose;
  29 extern int am_root;
  30 extern int am_server;
  31 extern int am_daemon;
  32 extern int am_sender;
  33 extern int am_generator;
  34 extern int inc_recurse;
  35 extern int do_progress;
  36 extern int always_checksum;
  37 extern int module_id;
  38 extern int ignore_errors;
  39 extern int numeric_ids;
  40 extern int recurse;
  41 extern int use_qsort;
  42 extern int xfer_dirs;
  43 extern int filesfrom_fd;
  44 extern int one_file_system;
  45 extern int copy_dirlinks;
  46 extern int keep_dirlinks;
  47 extern int preserve_uid;
  48 extern int preserve_gid;
  49 extern int preserve_acls;
  50 extern int preserve_xattrs;
  51 extern int preserve_links;
  52 extern int preserve_hard_links;
  53 extern int preserve_devices;
  54 extern int preserve_specials;
  55 extern int uid_ndx;
  56 extern int gid_ndx;
  57 extern int eol_nulls;
  58 extern int relative_paths;
  59 extern int implied_dirs;
  60 extern int file_extra_cnt;
  61 extern int ignore_perishable;
  62 extern int non_perishable_cnt;
  63 extern int prune_empty_dirs;
  64 extern int copy_links;
  65 extern int copy_unsafe_links;
  66 extern int protocol_version;
  67 extern int sanitize_paths;
  68 extern int munge_symlinks;
  69 extern int need_unsorted_flist;
  70 extern int unsort_ndx;
  71 extern struct stats stats;
  72 extern char *filesfrom_host;
  73
  74 extern char curr_dir[MAXPATHLEN];
  75
  76 extern struct chmod_mode_struct *chmod_modes;
  77
  78 extern struct filter_list_struct filter_list;
  79 extern struct filter_list_struct daemon_filter_list;
  80
  81 #ifdef ICONV_OPTION
  82 extern int filesfrom_convert;
  83 extern iconv_t ic_send, ic_recv;
  84 #endif
  85
  86 #define PTR_SIZE (sizeof (struct file_struct *))
  87
  88 int io_error;
  89 int checksum_len;
  90 dev_t filesystem_dev; /* used to implement -x */
  91
  92 struct file_list *cur_flist, *first_flist, *dir_flist;
  93 int send_dir_ndx = -1, send_dir_depth = -1;
  94 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  95 int file_total = 0; /* total of all active items over all file-lists */
  96 int flist_eof = 0; /* all the file-lists are now known */
  97
  98 #define NORMAL_NAME 0
  99 #define SLASH_ENDING_NAME 1
 100 #define DOTDIR_NAME 2
 101
 102 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 103  * internally, even if this platform does not allow files to have 64-bit inums.
 104  * The only exception is if we're on a platform with no 64-bit type at all.
 105  *
 106  * Because we use read_longint() to get these off the wire, if you transfer
 107  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 108  * machine with no 64-bit types then you will get an overflow error.
 109  *
 110  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 111  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 112  * be truncated.  But it's a kind of silly thing to do anyhow. */
 113
 114 /* The tmp_* vars are used as a cache area by make_file() to store data
 115  * that the sender doesn't need to remember in its file list.  The data
 116  * will survive just long enough to be used by send_file_entry(). */
 117 static dev_t tmp_rdev;
 118 #ifdef SUPPORT_HARD_LINKS
 119 static int64 tmp_dev, tmp_ino;
 120 #endif
 121 static char tmp_sum[MAX_DIGEST_LEN];
 122
 123 static char empty_sum[MAX_DIGEST_LEN];
 124 static int flist_count_offset; /* for --delete --progress */
 125 static int dir_count = 0;
 126
 127 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 128 static void output_flist(struct file_list *flist);
 129
 130 void init_flist(void)
 131 {
 132         if (verbose > 4) {
 133                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 134                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 135         }
 136         checksum_len = protocol_version < 21 ? 2
 137                      : protocol_version < 30 ? MD4_DIGEST_LEN
 138                      : MD5_DIGEST_LEN;
 139 }
 140
 141 static int show_filelist_p(void)
 142 {
 143         return verbose && xfer_dirs && !am_server && !inc_recurse;
 144 }
 145
 146 static void start_filelist_progress(char *kind)
 147 {
 148         rprintf(FCLIENT, "%s ... ", kind);
 149         if (verbose > 1 || do_progress)
 150                 rprintf(FCLIENT, "\n");
 151         rflush(FINFO);
 152 }
 153
 154 static void emit_filelist_progress(int count)
 155 {
 156         rprintf(FCLIENT, " %d files...\r", count);
 157 }
 158
 159 static void maybe_emit_filelist_progress(int count)
 160 {
 161         if (do_progress && show_filelist_p() && (count % 100) == 0)
 162                 emit_filelist_progress(count);
 163 }
 164
 165 static void finish_filelist_progress(const struct file_list *flist)
 166 {
 167         if (do_progress) {
 168                 /* This overwrites the progress line */
 169                 rprintf(FINFO, "%d file%sto consider\n",
 170                         flist->used, flist->used == 1 ? " " : "s ");
 171         } else
 172                 rprintf(FINFO, "done\n");
 173 }
 174
 175 void show_flist_stats(void)
 176 {
 177         /* Nothing yet */
 178 }
 179
 180 /* Stat either a symlink or its referent, depending on the settings of
 181  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 182  *
 183  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 184  * MAXPATHLEN chars) will be set to the symlink's target string.
 185  *
 186  * The stat structure pointed to by stp will contain information about the
 187  * link or the referent as appropriate, if they exist. */
 188 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 189 {
 190 #ifdef SUPPORT_LINKS
 191         if (link_stat(path, stp, copy_dirlinks) < 0)
 192                 return -1;
 193         if (S_ISLNK(stp->st_mode)) {
 194                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 195                 if (llen < 0)
 196                         return -1;
 197                 linkbuf[llen] = '\0';
 198                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 199                         if (verbose > 1) {
 200                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 201                                         path, linkbuf);
 202                         }
 203                         return x_stat(path, stp, NULL);
 204                 }
 205                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 206                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 207                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 208                                 llen - SYMLINK_PREFIX_LEN + 1);
 209                 }
 210         }
 211         return 0;
 212 #else
 213         return x_stat(path, stp, NULL);
 214 #endif
 215 }
 216
 217 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 218 {
 219 #ifdef SUPPORT_LINKS
 220         if (copy_links)
 221                 return x_stat(path, stp, NULL);
 222         if (x_lstat(path, stp, NULL) < 0)
 223                 return -1;
 224         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 225                 STRUCT_STAT st;
 226                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 227                         *stp = st;
 228         }
 229         return 0;
 230 #else
 231         return x_stat(path, stp, NULL);
 232 #endif
 233 }
 234
 235 static inline int is_daemon_excluded(const char *fname, int is_dir)
 236 {
 237         if (daemon_filter_list.head
 238          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 239                 errno = ENOENT;
 240                 return 1;
 241         }
 242         return 0;
 243 }
 244
 245 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 246 {
 247         if (daemon_filter_list.head) {
 248                 char *slash = path;
 249
 250                 while ((slash = strchr(slash+1, '/')) != NULL) {
 251                         int ret;
 252                         *slash = '\0';
 253                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 254                         *slash = '/';
 255                         if (ret < 0) {
 256                                 errno = ENOENT;
 257                                 return 1;
 258                         }
 259                 }
 260
 261                 if (!ignore_filename
 262                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 263                         errno = ENOENT;
 264                         return 1;
 265                 }
 266         }
 267
 268         return 0;
 269 }
 270
 271 /* This function is used to check if a file should be included/excluded
 272  * from the list of files based on its name and type etc.  The value of
 273  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 274 static int is_excluded(const char *fname, int is_dir, int filter_level)
 275 {
 276 #if 0 /* This currently never happens, so avoid a useless compare. */
 277         if (filter_level == NO_FILTERS)
 278                 return 0;
 279 #endif
 280         if (is_daemon_excluded(fname, is_dir))
 281                 return 1;
 282         if (filter_level != ALL_FILTERS)
 283                 return 0;
 284         if (filter_list.head
 285             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 286                 return 1;
 287         return 0;
 288 }
 289
 290 static void send_directory(int f, struct file_list *flist,
 291                            char *fbuf, int len, int flags);
 292
 293 static const char *pathname, *orig_dir;
 294 static int pathname_len;
 295
 296 /* Make sure flist can hold at least flist->used + extra entries. */
 297 static void flist_expand(struct file_list *flist, int extra)
 298 {
 299         struct file_struct **new_ptr;
 300
 301         if (flist->used + extra <= flist->malloced)
 302                 return;
 303
 304         if (flist->malloced < FLIST_START)
 305                 flist->malloced = FLIST_START;
 306         else if (flist->malloced >= FLIST_LINEAR)
 307                 flist->malloced += FLIST_LINEAR;
 308         else
 309                 flist->malloced *= 2;
 310
 311         /* In case count jumped or we are starting the list
 312          * with a known size just set it. */
 313         if (flist->malloced < flist->used + extra)
 314                 flist->malloced = flist->used + extra;
 315
 316         new_ptr = realloc_array(flist->files, struct file_struct *,
 317                                 flist->malloced);
 318
 319         if (verbose >= 2 && flist->malloced != FLIST_START) {
 320                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 321                     who_am_i(),
 322                     (double)sizeof flist->files[0] * flist->malloced,
 323                     (new_ptr == flist->files) ? " not" : "");
 324         }
 325
 326         flist->files = new_ptr;
 327
 328         if (!flist->files)
 329                 out_of_memory("flist_expand");
 330 }
 331
 332 static void flist_done_allocating(struct file_list *flist)
 333 {
 334         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 335         if (flist->pool_boundary == ptr)
 336                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 337         else
 338                 flist->pool_boundary = ptr;
 339 }
 340
 341 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 342  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 343  * with dir == NULL taken to be the starting directory, and dirlen < 0
 344  * indicating that strdup(dir) should be called and then the -dirlen length
 345  * value checked to ensure that it is not daemon-excluded. */
 346 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 347 {
 348         if (dirlen < 0) {
 349                 char *cpy = strdup(dir);
 350                 if (*cpy != '/')
 351                         change_dir(orig_dir, CD_SKIP_CHDIR);
 352                 if (path_is_daemon_excluded(cpy, 0))
 353                         goto chdir_error;
 354                 dir = cpy;
 355                 dirlen = -dirlen;
 356         } else {
 357                 if (file) {
 358                         if (pathname == F_PATHNAME(file))
 359                                 return 1;
 360                         dir = F_PATHNAME(file);
 361                         if (dir)
 362                                 dirlen = strlen(dir);
 363                 } else if (pathname == dir)
 364                         return 1;
 365                 if (dir && *dir != '/')
 366                         change_dir(orig_dir, CD_SKIP_CHDIR);
 367         }
 368
 369         pathname = dir;
 370         pathname_len = dirlen;
 371
 372         if (!dir)
 373                 dir = orig_dir;
 374
 375         if (!change_dir(dir, CD_NORMAL)) {
 376           chdir_error:
 377                 io_error |= IOERR_GENERAL;
 378                 rsyserr(FERROR, errno, "change_dir %s failed", full_fname(dir));
 379                 if (dir != orig_dir)
 380                         change_dir(orig_dir, CD_NORMAL);
 381                 pathname = NULL;
 382                 pathname_len = 0;
 383                 return 0;
 384         }
 385
 386         return 1;
 387 }
 388
 389 static void send_file_entry(int f, const char *fname, struct file_struct *file, int ndx, int first_ndx)
 390 {
 391         static time_t modtime;
 392         static mode_t mode;
 393 #ifdef SUPPORT_HARD_LINKS
 394         static int64 dev;
 395 #endif
 396         static dev_t rdev;
 397         static uint32 rdev_major;
 398         static uid_t uid;
 399         static gid_t gid;
 400         static const char *user_name, *group_name;
 401         static char lastname[MAXPATHLEN];
 402         int first_hlink_ndx = -1;
 403         int l1, l2;
 404         int xflags;
 405
 406         /* Initialize starting value of xflags. */
 407         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 408                 dir_count++;
 409                 if (file->flags & FLAG_CONTENT_DIR)
 410                         xflags = file->flags & FLAG_TOP_DIR;
 411                 else if (file->flags & FLAG_IMPLIED_DIR)
 412                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 413                 else
 414                         xflags = XMIT_NO_CONTENT_DIR;
 415         } else
 416                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 417
 418         if (file->mode == mode)
 419                 xflags |= XMIT_SAME_MODE;
 420         else
 421                 mode = file->mode;
 422
 423         if ((preserve_devices && IS_DEVICE(mode))
 424          || (preserve_specials && IS_SPECIAL(mode))) {
 425                 if (protocol_version < 28) {
 426                         if (tmp_rdev == rdev)
 427                                 xflags |= XMIT_SAME_RDEV_pre28;
 428                         else
 429                                 rdev = tmp_rdev;
 430                 } else {
 431                         rdev = tmp_rdev;
 432                         if ((uint32)major(rdev) == rdev_major)
 433                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 434                         else
 435                                 rdev_major = major(rdev);
 436                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 437                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 438                 }
 439         } else if (protocol_version < 28)
 440                 rdev = MAKEDEV(0, 0);
 441         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 442                 xflags |= XMIT_SAME_UID;
 443         else {
 444                 uid = F_OWNER(file);
 445                 if (!numeric_ids) {
 446                         user_name = add_uid(uid);
 447                         if (inc_recurse && user_name)
 448                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 449                 }
 450         }
 451         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 452                 xflags |= XMIT_SAME_GID;
 453         else {
 454                 gid = F_GROUP(file);
 455                 if (!numeric_ids) {
 456                         group_name = add_gid(gid);
 457                         if (inc_recurse && group_name)
 458                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 459                 }
 460         }
 461         if (file->modtime == modtime)
 462                 xflags |= XMIT_SAME_TIME;
 463         else
 464                 modtime = file->modtime;
 465
 466 #ifdef SUPPORT_HARD_LINKS
 467         if (tmp_dev != 0) {
 468                 if (protocol_version >= 30) {
 469                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 470                         first_hlink_ndx = (int32)(long)np->data - 1;
 471                         if (first_hlink_ndx < 0) {
 472                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 473                                 xflags |= XMIT_HLINK_FIRST;
 474                         }
 475                 } else {
 476                         if (tmp_dev == dev) {
 477                                 if (protocol_version >= 28)
 478                                         xflags |= XMIT_SAME_DEV_pre30;
 479                         } else
 480                                 dev = tmp_dev;
 481                 }
 482                 xflags |= XMIT_HLINKED;
 483         }
 484 #endif
 485
 486         for (l1 = 0;
 487             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 488             l1++) {}
 489         l2 = strlen(fname+l1);
 490
 491         if (l1 > 0)
 492                 xflags |= XMIT_SAME_NAME;
 493         if (l2 > 255)
 494                 xflags |= XMIT_LONG_NAME;
 495
 496         /* We must make sure we don't send a zero flag byte or the
 497          * other end will terminate the flist transfer.  Note that
 498          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 499          * it's harmless way to add a bit to the first flag byte. */
 500         if (protocol_version >= 28) {
 501                 if (!xflags && !S_ISDIR(mode))
 502                         xflags |= XMIT_TOP_DIR;
 503                 if ((xflags & 0xFF00) || !xflags) {
 504                         xflags |= XMIT_EXTENDED_FLAGS;
 505                         write_shortint(f, xflags);
 506                 } else
 507                         write_byte(f, xflags);
 508         } else {
 509                 if (!(xflags & 0xFF))
 510                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 511                 write_byte(f, xflags);
 512         }
 513         if (xflags & XMIT_SAME_NAME)
 514                 write_byte(f, l1);
 515         if (xflags & XMIT_LONG_NAME)
 516                 write_varint30(f, l2);
 517         else
 518                 write_byte(f, l2);
 519         write_buf(f, fname + l1, l2);
 520
 521         if (first_hlink_ndx >= 0) {
 522                 write_varint(f, first_hlink_ndx);
 523                 if (first_hlink_ndx >= first_ndx)
 524                         goto the_end;
 525         }
 526
 527         write_varlong30(f, F_LENGTH(file), 3);
 528         if (!(xflags & XMIT_SAME_TIME)) {
 529                 if (protocol_version >= 30)
 530                         write_varlong(f, modtime, 4);
 531                 else
 532                         write_int(f, modtime);
 533         }
 534         if (!(xflags & XMIT_SAME_MODE))
 535                 write_int(f, to_wire_mode(mode));
 536         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 537                 if (protocol_version < 30)
 538                         write_int(f, uid);
 539                 else {
 540                         write_varint(f, uid);
 541                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 542                                 int len = strlen(user_name);
 543                                 write_byte(f, len);
 544                                 write_buf(f, user_name, len);
 545                         }
 546                 }
 547         }
 548         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 549                 if (protocol_version < 30)
 550                         write_int(f, gid);
 551                 else {
 552                         write_varint(f, gid);
 553                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 554                                 int len = strlen(group_name);
 555                                 write_byte(f, len);
 556                                 write_buf(f, group_name, len);
 557                         }
 558                 }
 559         }
 560         if ((preserve_devices && IS_DEVICE(mode))
 561          || (preserve_specials && IS_SPECIAL(mode))) {
 562                 if (protocol_version < 28) {
 563                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 564                                 write_int(f, (int)rdev);
 565                 } else {
 566                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 567                                 write_varint30(f, major(rdev));
 568                         if (protocol_version >= 30)
 569                                 write_varint(f, minor(rdev));
 570                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 571                                 write_byte(f, minor(rdev));
 572                         else
 573                                 write_int(f, minor(rdev));
 574                 }
 575         }
 576
 577 #ifdef SUPPORT_LINKS
 578         if (preserve_links && S_ISLNK(mode)) {
 579                 const char *sl = F_SYMLINK(file);
 580                 int len = strlen(sl);
 581                 write_varint30(f, len);
 582                 write_buf(f, sl, len);
 583         }
 584 #endif
 585
 586 #ifdef SUPPORT_HARD_LINKS
 587         if (tmp_dev != 0 && protocol_version < 30) {
 588                 if (protocol_version < 26) {
 589                         /* 32-bit dev_t and ino_t */
 590                         write_int(f, (int32)dev);
 591                         write_int(f, (int32)tmp_ino);
 592                 } else {
 593                         /* 64-bit dev_t and ino_t */
 594                         if (!(xflags & XMIT_SAME_DEV_pre30))
 595                                 write_longint(f, dev);
 596                         write_longint(f, tmp_ino);
 597                 }
 598         }
 599 #endif
 600
 601         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 602                 const char *sum;
 603                 if (S_ISREG(mode))
 604                         sum = tmp_sum;
 605                 else {
 606                         /* Prior to 28, we sent a useless set of nulls. */
 607                         sum = empty_sum;
 608                 }
 609                 write_buf(f, sum, checksum_len);
 610         }
 611
 612   the_end:
 613         strlcpy(lastname, fname, MAXPATHLEN);
 614
 615         if (S_ISREG(mode) || S_ISLNK(mode))
 616                 stats.total_size += F_LENGTH(file);
 617 }
 618
 619 static struct file_struct *recv_file_entry(struct file_list *flist,
 620                                            int xflags, int f)
 621 {
 622         static int64 modtime;
 623         static mode_t mode;
 624 #ifdef SUPPORT_HARD_LINKS
 625         static int64 dev;
 626 #endif
 627         static dev_t rdev;
 628         static uint32 rdev_major;
 629         static uid_t uid;
 630         static gid_t gid;
 631         static uint16 gid_flags;
 632         static char lastname[MAXPATHLEN], *lastdir;
 633         static int lastdir_depth, lastdir_len = -1;
 634         static unsigned int del_hier_name_len = 0;
 635         static int in_del_hier = 0;
 636         char thisname[MAXPATHLEN];
 637         unsigned int l1 = 0, l2 = 0;
 638         int alloc_len, basename_len, linkname_len;
 639         int extra_len = file_extra_cnt * EXTRA_LEN;
 640         int first_hlink_ndx = -1;
 641         OFF_T file_length;
 642         const char *basename;
 643         struct file_struct *file;
 644         alloc_pool_t *pool;
 645         char *bp;
 646
 647         if (xflags & XMIT_SAME_NAME)
 648                 l1 = read_byte(f);
 649
 650         if (xflags & XMIT_LONG_NAME)
 651                 l2 = read_varint30(f);
 652         else
 653                 l2 = read_byte(f);
 654
 655         if (l2 >= MAXPATHLEN - l1) {
 656                 rprintf(FERROR,
 657                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 658                         xflags, l1, l2, lastname, who_am_i());
 659                 overflow_exit("recv_file_entry");
 660         }
 661
 662         strlcpy(thisname, lastname, l1 + 1);
 663         read_sbuf(f, &thisname[l1], l2);
 664         thisname[l1 + l2] = 0;
 665
 666         /* Abuse basename_len for a moment... */
 667         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 668
 669 #ifdef ICONV_OPTION
 670         if (ic_recv != (iconv_t)-1) {
 671                 xbuf outbuf, inbuf;
 672
 673                 INIT_CONST_XBUF(outbuf, thisname);
 674                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 675
 676                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 677                         io_error |= IOERR_GENERAL;
 678                         rprintf(FINFO,
 679                             "[%s] cannot convert filename: %s (%s)\n",
 680                             who_am_i(), lastname, strerror(errno));
 681                         outbuf.len = 0;
 682                 }
 683                 outbuf.buf[outbuf.len] = '\0';
 684         }
 685 #endif
 686
 687         if (*thisname)
 688                 clean_fname(thisname, 0);
 689
 690         if (sanitize_paths)
 691                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 692
 693         if ((basename = strrchr(thisname, '/')) != NULL) {
 694                 int len = basename++ - thisname;
 695                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 696                         lastdir = new_array(char, len + 1);
 697                         memcpy(lastdir, thisname, len);
 698                         lastdir[len] = '\0';
 699                         lastdir_len = len;
 700                         lastdir_depth = count_dir_elements(lastdir);
 701                 }
 702         } else
 703                 basename = thisname;
 704         basename_len = strlen(basename) + 1; /* count the '\0' */
 705
 706 #ifdef SUPPORT_HARD_LINKS
 707         if (protocol_version >= 30
 708          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 709                 first_hlink_ndx = read_varint(f);
 710                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 711                         rprintf(FERROR,
 712                                 "hard-link reference out of range: %d (%d)\n",
 713                                 first_hlink_ndx, flist->ndx_start + flist->used);
 714                         exit_cleanup(RERR_PROTOCOL);
 715                 }
 716                 if (first_hlink_ndx >= flist->ndx_start) {
 717                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 718                         file_length = F_LENGTH(first);
 719                         modtime = first->modtime;
 720                         mode = first->mode;
 721                         if (preserve_uid)
 722                                 uid = F_OWNER(first);
 723                         if (preserve_gid)
 724                                 gid = F_GROUP(first);
 725                         if ((preserve_devices && IS_DEVICE(mode))
 726                          || (preserve_specials && IS_SPECIAL(mode))) {
 727                                 uint32 *devp = F_RDEV_P(first);
 728                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 729                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 730                         }
 731                         if (preserve_links && S_ISLNK(mode))
 732                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 733                         else
 734                                 linkname_len = 0;
 735                         goto create_object;
 736                 }
 737         }
 738 #endif
 739
 740         file_length = read_varlong30(f, 3);
 741         if (!(xflags & XMIT_SAME_TIME)) {
 742                 if (protocol_version >= 30) {
 743                         modtime = read_varlong(f, 4);
 744 #if SIZEOF_TIME_T < SIZEOF_INT64
 745                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 746                                 rprintf(FERROR_XFER,
 747                                     "Time value of %s truncated on receiver.\n",
 748                                     lastname);
 749                         }
 750 #endif
 751                 } else
 752                         modtime = read_int(f);
 753         }
 754         if (!(xflags & XMIT_SAME_MODE))
 755                 mode = from_wire_mode(read_int(f));
 756
 757         if (chmod_modes && !S_ISLNK(mode))
 758                 mode = tweak_mode(mode, chmod_modes);
 759
 760         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 761                 if (protocol_version < 30)
 762                         uid = (uid_t)read_int(f);
 763                 else {
 764                         uid = (uid_t)read_varint(f);
 765                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 766                                 uid = recv_user_name(f, uid);
 767                         else if (inc_recurse && am_root && !numeric_ids)
 768                                 uid = match_uid(uid);
 769                 }
 770         }
 771         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 772                 if (protocol_version < 30)
 773                         gid = (gid_t)read_int(f);
 774                 else {
 775                         gid = (gid_t)read_varint(f);
 776                         gid_flags = 0;
 777                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 778                                 gid = recv_group_name(f, gid, &gid_flags);
 779                         else if (inc_recurse && (!am_root || !numeric_ids))
 780                                 gid = match_gid(gid, &gid_flags);
 781                 }
 782         }
 783
 784         if ((preserve_devices && IS_DEVICE(mode))
 785          || (preserve_specials && IS_SPECIAL(mode))) {
 786                 if (protocol_version < 28) {
 787                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 788                                 rdev = (dev_t)read_int(f);
 789                 } else {
 790                         uint32 rdev_minor;
 791                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 792                                 rdev_major = read_varint30(f);
 793                         if (protocol_version >= 30)
 794                                 rdev_minor = read_varint(f);
 795                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 796                                 rdev_minor = read_byte(f);
 797                         else
 798                                 rdev_minor = read_int(f);
 799                         rdev = MAKEDEV(rdev_major, rdev_minor);
 800                 }
 801                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 802                 file_length = 0;
 803         } else if (protocol_version < 28)
 804                 rdev = MAKEDEV(0, 0);
 805
 806 #ifdef SUPPORT_LINKS
 807         if (preserve_links && S_ISLNK(mode)) {
 808                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 809                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 810                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 811                                 linkname_len - 1);
 812                         overflow_exit("recv_file_entry");
 813                 }
 814                 if (munge_symlinks)
 815                         linkname_len += SYMLINK_PREFIX_LEN;
 816         }
 817         else
 818 #endif
 819                 linkname_len = 0;
 820
 821 #ifdef SUPPORT_HARD_LINKS
 822   create_object:
 823         if (preserve_hard_links) {
 824                 if (protocol_version < 28 && S_ISREG(mode))
 825                         xflags |= XMIT_HLINKED;
 826                 if (xflags & XMIT_HLINKED)
 827                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 828         }
 829 #endif
 830
 831 #ifdef SUPPORT_ACLS
 832         /* Directories need an extra int32 for the default ACL. */
 833         if (preserve_acls && S_ISDIR(mode))
 834                 extra_len += EXTRA_LEN;
 835 #endif
 836
 837         if (always_checksum && S_ISREG(mode))
 838                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 839
 840         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 841                 extra_len += EXTRA_LEN;
 842
 843         if (inc_recurse && S_ISDIR(mode)) {
 844                 if (one_file_system) {
 845                         /* Room to save the dir's device for -x */
 846                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 847                 }
 848                 pool = dir_flist->file_pool;
 849         } else
 850                 pool = flist->file_pool;
 851
 852 #if EXTRA_ROUNDING > 0
 853         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 854                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 855 #endif
 856
 857         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 858                   + linkname_len;
 859         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 860
 861         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 862         bp += extra_len;
 863         file = (struct file_struct *)bp;
 864         bp += FILE_STRUCT_LEN;
 865
 866         memcpy(bp, basename, basename_len);
 867
 868 #ifdef SUPPORT_HARD_LINKS
 869         if (xflags & XMIT_HLINKED)
 870                 file->flags |= FLAG_HLINKED;
 871 #endif
 872         file->modtime = (time_t)modtime;
 873         file->len32 = (uint32)file_length;
 874         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 875                 file->flags |= FLAG_LENGTH64;
 876                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 877         }
 878         file->mode = mode;
 879         if (preserve_uid)
 880                 F_OWNER(file) = uid;
 881         if (preserve_gid) {
 882                 F_GROUP(file) = gid;
 883                 file->flags |= gid_flags;
 884         }
 885         if (unsort_ndx)
 886                 F_NDX(file) = flist->used + flist->ndx_start;
 887
 888         if (basename != thisname) {
 889                 file->dirname = lastdir;
 890                 F_DEPTH(file) = lastdir_depth + 1;
 891         } else
 892                 F_DEPTH(file) = 1;
 893
 894         if (S_ISDIR(mode)) {
 895                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 896                         F_DEPTH(file)--;
 897                 if (protocol_version >= 30) {
 898                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 899                                 if (xflags & XMIT_TOP_DIR)
 900                                         file->flags |= FLAG_TOP_DIR;
 901                                 file->flags |= FLAG_CONTENT_DIR;
 902                         } else if (xflags & XMIT_TOP_DIR)
 903                                 file->flags |= FLAG_IMPLIED_DIR;
 904                 } else if (xflags & XMIT_TOP_DIR) {
 905                         in_del_hier = recurse;
 906                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 907                         if (relative_paths && del_hier_name_len > 2
 908                             && lastname[del_hier_name_len-1] == '.'
 909                             && lastname[del_hier_name_len-2] == '/')
 910                                 del_hier_name_len -= 2;
 911                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 912                 } else if (in_del_hier) {
 913                         if (!relative_paths || !del_hier_name_len
 914                          || (l1 >= del_hier_name_len
 915                           && lastname[del_hier_name_len] == '/'))
 916                                 file->flags |= FLAG_CONTENT_DIR;
 917                         else
 918                                 in_del_hier = 0;
 919                 }
 920         }
 921
 922         if ((preserve_devices && IS_DEVICE(mode))
 923          || (preserve_specials && IS_SPECIAL(mode))) {
 924                 uint32 *devp = F_RDEV_P(file);
 925                 DEV_MAJOR(devp) = major(rdev);
 926                 DEV_MINOR(devp) = minor(rdev);
 927         }
 928
 929 #ifdef SUPPORT_LINKS
 930         if (linkname_len) {
 931                 bp += basename_len;
 932                 if (first_hlink_ndx >= flist->ndx_start) {
 933                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 934                         memcpy(bp, F_SYMLINK(first), linkname_len);
 935                 } else if (munge_symlinks) {
 936                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 937                         bp += SYMLINK_PREFIX_LEN;
 938                         linkname_len -= SYMLINK_PREFIX_LEN;
 939                         read_sbuf(f, bp, linkname_len - 1);
 940                 } else {
 941                         read_sbuf(f, bp, linkname_len - 1);
 942                         if (sanitize_paths)
 943                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
 944                 }
 945         }
 946 #endif
 947
 948 #ifdef SUPPORT_HARD_LINKS
 949         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 950                 if (protocol_version >= 30) {
 951                         if (xflags & XMIT_HLINK_FIRST) {
 952                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
 953                         } else
 954                                 F_HL_GNUM(file) = first_hlink_ndx;
 955                 } else {
 956                         static int32 cnt = 0;
 957                         struct ht_int64_node *np;
 958                         int64 ino;
 959                         int32 ndx;
 960                         if (protocol_version < 26) {
 961                                 dev = read_int(f);
 962                                 ino = read_int(f);
 963                         } else {
 964                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 965                                         dev = read_longint(f);
 966                                 ino = read_longint(f);
 967                         }
 968                         np = idev_find(dev, ino);
 969                         ndx = (int32)(long)np->data - 1;
 970                         if (ndx < 0) {
 971                                 ndx = cnt++;
 972                                 np->data = (void*)(long)cnt;
 973                         }
 974                         F_HL_GNUM(file) = ndx;
 975                 }
 976         }
 977 #endif
 978
 979         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 980                 if (S_ISREG(mode))
 981                         bp = F_SUM(file);
 982                 else {
 983                         /* Prior to 28, we get a useless set of nulls. */
 984                         bp = tmp_sum;
 985                 }
 986                 if (first_hlink_ndx >= flist->ndx_start) {
 987                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 988                         memcpy(bp, F_SUM(first), checksum_len);
 989                 } else
 990                         read_buf(f, bp, checksum_len);
 991         }
 992
 993 #ifdef SUPPORT_ACLS
 994         if (preserve_acls && !S_ISLNK(mode))
 995                 receive_acl(file, f);
 996 #endif
 997 #ifdef SUPPORT_XATTRS
 998         if (preserve_xattrs)
 999                 receive_xattr(file, f );
1000 #endif
1001
1002         if (S_ISREG(mode) || S_ISLNK(mode))
1003                 stats.total_size += file_length;
1004
1005         return file;
1006 }
1007
1008 /* Create a file_struct for a named file by reading its stat() information
1009  * and performing extensive checks against global options.
1010  *
1011  * Returns a pointer to the new file struct, or NULL if there was an error
1012  * or this file should be excluded. */
1013 struct file_struct *make_file(const char *fname, struct file_list *flist,
1014                               STRUCT_STAT *stp, int flags, int filter_level)
1015 {
1016         static char *lastdir;
1017         static int lastdir_len = -1;
1018         struct file_struct *file;
1019         char thisname[MAXPATHLEN];
1020         char linkname[MAXPATHLEN];
1021         int alloc_len, basename_len, linkname_len;
1022         int extra_len = file_extra_cnt * EXTRA_LEN;
1023         const char *basename;
1024         alloc_pool_t *pool;
1025         STRUCT_STAT st;
1026         char *bp;
1027
1028         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1029                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1030                 return NULL;
1031         }
1032         clean_fname(thisname, 0);
1033         if (sanitize_paths)
1034                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1035
1036         if (stp && S_ISDIR(stp->st_mode)) {
1037                 st = *stp; /* Needed for "symlink/." with --relative. */
1038                 *linkname = '\0'; /* make IBM code checker happy */
1039         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1040                 int save_errno = errno;
1041                 /* See if file is excluded before reporting an error. */
1042                 if (filter_level != NO_FILTERS
1043                  && (is_excluded(thisname, 0, filter_level)
1044                   || is_excluded(thisname, 1, filter_level))) {
1045                         if (ignore_perishable && save_errno != ENOENT)
1046                                 non_perishable_cnt++;
1047                         return NULL;
1048                 }
1049                 if (save_errno == ENOENT) {
1050 #ifdef SUPPORT_LINKS
1051                         /* When our options tell us to follow a symlink that
1052                          * points nowhere, tell the user about the symlink
1053                          * instead of giving a "vanished" message.  We only
1054                          * dereference a symlink if one of the --copy*links
1055                          * options was specified, so there's no need for the
1056                          * extra lstat() if one of these options isn't on. */
1057                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1058                          && x_lstat(thisname, &st, NULL) == 0
1059                          && S_ISLNK(st.st_mode)) {
1060                                 io_error |= IOERR_GENERAL;
1061                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1062                                         full_fname(thisname));
1063                         } else
1064 #endif
1065                         {
1066                                 enum logcode c = am_daemon && protocol_version < 28
1067                                                ? FERROR : FWARNING;
1068                                 io_error |= IOERR_VANISHED;
1069                                 rprintf(c, "file has vanished: %s\n",
1070                                         full_fname(thisname));
1071                         }
1072                 } else {
1073                         io_error |= IOERR_GENERAL;
1074                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1075                                 full_fname(thisname));
1076                 }
1077                 return NULL;
1078         }
1079
1080         if (filter_level == NO_FILTERS)
1081                 goto skip_filters;
1082
1083         if (S_ISDIR(st.st_mode)) {
1084                 if (!xfer_dirs) {
1085                         rprintf(FINFO, "skipping directory %s\n", thisname);
1086                         return NULL;
1087                 }
1088                 /* -x only affects dirs because we need to avoid recursing
1089                  * into a mount-point directory, not to avoid copying a
1090                  * symlinked file if -L (or similar) was specified. */
1091                 if (one_file_system && st.st_dev != filesystem_dev
1092                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1093                         if (one_file_system > 1) {
1094                                 if (verbose > 1) {
1095                                         rprintf(FINFO,
1096                                             "[%s] skipping mount-point dir %s\n",
1097                                             who_am_i(), thisname);
1098                                 }
1099                                 return NULL;
1100                         }
1101                         flags |= FLAG_MOUNT_DIR;
1102                         flags &= ~FLAG_CONTENT_DIR;
1103                 }
1104         } else
1105                 flags &= ~FLAG_CONTENT_DIR;
1106
1107         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1108                 if (ignore_perishable)
1109                         non_perishable_cnt++;
1110                 return NULL;
1111         }
1112
1113         if (lp_ignore_nonreadable(module_id)) {
1114 #ifdef SUPPORT_LINKS
1115                 if (!S_ISLNK(st.st_mode))
1116 #endif
1117                         if (access(thisname, R_OK) != 0)
1118                                 return NULL;
1119         }
1120
1121   skip_filters:
1122
1123         /* Only divert a directory in the main transfer. */
1124         if (flist) {
1125                 if (flist->prev && S_ISDIR(st.st_mode)
1126                  && flags & FLAG_DIVERT_DIRS) {
1127                         /* Room for parent/sibling/next-child info. */
1128                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1129                         if (relative_paths)
1130                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1131                         pool = dir_flist->file_pool;
1132                 } else
1133                         pool = flist->file_pool;
1134         } else {
1135 #ifdef SUPPORT_ACLS
1136                 /* Directories need an extra int32 for the default ACL. */
1137                 if (preserve_acls && S_ISDIR(st.st_mode))
1138                         extra_len += EXTRA_LEN;
1139 #endif
1140                 pool = NULL;
1141         }
1142
1143         if (verbose > 2) {
1144                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1145                         who_am_i(), thisname, filter_level);
1146         }
1147
1148         if ((basename = strrchr(thisname, '/')) != NULL) {
1149                 int len = basename++ - thisname;
1150                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1151                         lastdir = new_array(char, len + 1);
1152                         memcpy(lastdir, thisname, len);
1153                         lastdir[len] = '\0';
1154                         lastdir_len = len;
1155                 }
1156         } else
1157                 basename = thisname;
1158         basename_len = strlen(basename) + 1; /* count the '\0' */
1159
1160 #ifdef SUPPORT_LINKS
1161         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1162 #else
1163         linkname_len = 0;
1164 #endif
1165
1166         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1167                 extra_len += EXTRA_LEN;
1168
1169 #if EXTRA_ROUNDING > 0
1170         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1171                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1172 #endif
1173
1174         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1175                   + linkname_len;
1176         if (pool)
1177                 bp = pool_alloc(pool, alloc_len, "make_file");
1178         else {
1179                 if (!(bp = new_array(char, alloc_len)))
1180                         out_of_memory("make_file");
1181         }
1182
1183         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1184         bp += extra_len;
1185         file = (struct file_struct *)bp;
1186         bp += FILE_STRUCT_LEN;
1187
1188         memcpy(bp, basename, basename_len);
1189
1190 #ifdef SUPPORT_HARD_LINKS
1191         if (preserve_hard_links && flist && flist->prev) {
1192                 if (protocol_version >= 28
1193                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1194                  : S_ISREG(st.st_mode)) {
1195                         tmp_dev = st.st_dev;
1196                         tmp_ino = st.st_ino;
1197                 } else
1198                         tmp_dev = 0;
1199         }
1200 #endif
1201
1202 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1203         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1204                 tmp_rdev = st.st_rdev;
1205                 st.st_size = 0;
1206         }
1207 #endif
1208
1209         file->flags = flags;
1210         file->modtime = st.st_mtime;
1211         file->len32 = (uint32)st.st_size;
1212         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1213                 file->flags |= FLAG_LENGTH64;
1214                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1215         }
1216         file->mode = st.st_mode;
1217         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1218                 F_OWNER(file) = st.st_uid;
1219         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1220                 F_GROUP(file) = st.st_gid;
1221
1222         if (basename != thisname)
1223                 file->dirname = lastdir;
1224
1225 #ifdef SUPPORT_LINKS
1226         if (linkname_len)
1227                 memcpy(bp + basename_len, linkname, linkname_len);
1228 #endif
1229
1230         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1231                 file_checksum(thisname, tmp_sum, st.st_size);
1232
1233         if (am_sender)
1234                 F_PATHNAME(file) = pathname;
1235         else if (!pool)
1236                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1237
1238         /* This code is only used by the receiver when it is building
1239          * a list of files for a delete pass. */
1240         if (keep_dirlinks && linkname_len && flist) {
1241                 STRUCT_STAT st2;
1242                 int save_mode = file->mode;
1243                 file->mode = S_IFDIR; /* Find a directory with our name. */
1244                 if (flist_find(dir_flist, file) >= 0
1245                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1246                         file->modtime = st2.st_mtime;
1247                         file->len32 = 0;
1248                         file->mode = st2.st_mode;
1249                         if (uid_ndx)
1250                                 F_OWNER(file) = st2.st_uid;
1251                         if (gid_ndx)
1252                                 F_GROUP(file) = st2.st_gid;
1253                 } else
1254                         file->mode = save_mode;
1255         }
1256
1257         if (basename_len == 0+1) {
1258                 if (!pool)
1259                         unmake_file(file);
1260                 return NULL;
1261         }
1262
1263         if (unsort_ndx)
1264                 F_NDX(file) = dir_count;
1265
1266         return file;
1267 }
1268
1269 /* Only called for temporary file_struct entries created by make_file(). */
1270 void unmake_file(struct file_struct *file)
1271 {
1272         free(REQ_EXTRA(file, F_DEPTH(file)));
1273 }
1274
1275 static struct file_struct *send_file_name(int f, struct file_list *flist,
1276                                           const char *fname, STRUCT_STAT *stp,
1277                                           int flags, int filter_level)
1278 {
1279         struct file_struct *file;
1280
1281         file = make_file(fname, flist, stp, flags, filter_level);
1282         if (!file)
1283                 return NULL;
1284
1285         if (chmod_modes && !S_ISLNK(file->mode))
1286                 file->mode = tweak_mode(file->mode, chmod_modes);
1287
1288         if (f >= 0) {
1289                 char fbuf[MAXPATHLEN];
1290 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1291                 stat_x sx;
1292 #endif
1293
1294 #ifdef ICONV_OPTION
1295                 if (ic_send != (iconv_t)-1) {
1296                         xbuf outbuf, inbuf;
1297
1298                         INIT_CONST_XBUF(outbuf, fbuf);
1299
1300                         if (file->dirname) {
1301                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1302                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1303                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1304                                         goto convert_error;
1305                                 outbuf.size += 2;
1306                                 outbuf.buf[outbuf.len++] = '/';
1307                         }
1308
1309                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1310                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1311                           convert_error:
1312                                 io_error |= IOERR_GENERAL;
1313                                 rprintf(FINFO,
1314                                     "[%s] cannot convert filename: %s (%s)\n",
1315                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1316                                 return NULL;
1317                         }
1318                         outbuf.buf[outbuf.len] = '\0';
1319                 } else
1320 #endif
1321                         f_name(file, fbuf);
1322
1323 #ifdef SUPPORT_ACLS
1324                 if (preserve_acls && !S_ISLNK(file->mode)) {
1325                         sx.st.st_mode = file->mode;
1326                         sx.acc_acl = sx.def_acl = NULL;
1327                         if (get_acl(fname, &sx) < 0)
1328                                 return NULL;
1329                 }
1330 #endif
1331 #ifdef SUPPORT_XATTRS
1332                 if (preserve_xattrs) {
1333                         sx.xattr = NULL;
1334                         if (get_xattr(fname, &sx) < 0)
1335                                 return NULL;
1336                 }
1337 #endif
1338
1339                 send_file_entry(f, fbuf, file, flist->used, flist->ndx_start);
1340
1341 #ifdef SUPPORT_ACLS
1342                 if (preserve_acls && !S_ISLNK(file->mode)) {
1343                         send_acl(&sx, f);
1344                         free_acl(&sx);
1345                 }
1346 #endif
1347 #ifdef SUPPORT_XATTRS
1348                 if (preserve_xattrs) {
1349                         F_XATTR(file) = send_xattr(&sx, f);
1350                         free_xattr(&sx);
1351                 }
1352 #endif
1353         }
1354
1355         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1356
1357         flist_expand(flist, 1);
1358         flist->files[flist->used++] = file;
1359
1360         return file;
1361 }
1362
1363 static void send_if_directory(int f, struct file_list *flist,
1364                               struct file_struct *file,
1365                               char *fbuf, unsigned int ol,
1366                               int flags)
1367 {
1368         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1369
1370         if (S_ISDIR(file->mode)
1371             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1372                 void *save_filters;
1373                 unsigned int len = strlen(fbuf);
1374                 if (len > 1 && fbuf[len-1] == '/')
1375                         fbuf[--len] = '\0';
1376                 if (len >= MAXPATHLEN - 1) {
1377                         io_error |= IOERR_GENERAL;
1378                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1379                                 full_fname(fbuf));
1380                         return;
1381                 }
1382                 save_filters = push_local_filters(fbuf, len);
1383                 send_directory(f, flist, fbuf, len, flags);
1384                 pop_local_filters(save_filters);
1385                 fbuf[ol] = '\0';
1386                 if (is_dot_dir)
1387                         fbuf[ol-1] = '.';
1388         }
1389 }
1390
1391 static int file_compare(const void *file1, const void *file2)
1392 {
1393         return f_name_cmp(*(struct file_struct **)file1,
1394                           *(struct file_struct **)file2);
1395 }
1396
1397 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1398  * version, but I (Wayne) changed the merge code to do less copying and
1399  * to require only half the amount of temporary memory. */
1400 static void fsort_tmp(struct file_struct **fp, size_t num,
1401                       struct file_struct **tmp)
1402 {
1403         struct file_struct **f1, **f2, **t;
1404         size_t n1, n2;
1405
1406         n1 = num / 2;
1407         n2 = num - n1;
1408         f1 = fp;
1409         f2 = fp + n1;
1410
1411         if (n1 > 1)
1412                 fsort_tmp(f1, n1, tmp);
1413         if (n2 > 1)
1414                 fsort_tmp(f2, n2, tmp);
1415
1416         while (f_name_cmp(*f1, *f2) <= 0) {
1417                 if (!--n1)
1418                         return;
1419                 f1++;
1420         }
1421
1422         t = tmp;
1423         memcpy(t, f1, n1 * PTR_SIZE);
1424
1425         *f1++ = *f2++, n2--;
1426
1427         while (n1 > 0 && n2 > 0) {
1428                 if (f_name_cmp(*t, *f2) <= 0)
1429                         *f1++ = *t++, n1--;
1430                 else
1431                         *f1++ = *f2++, n2--;
1432         }
1433
1434         if (n1 > 0)
1435                 memcpy(f1, t, n1 * PTR_SIZE);
1436 }
1437
1438 /* This file-struct sorting routine makes sure that any identical names in
1439  * the file list stay in the same order as they were in the original list.
1440  * This is particularly vital in inc_recurse mode where we expect a sort
1441  * on the flist to match the exact order of a sort on the dir_flist. */
1442 static void fsort(struct file_struct **fp, size_t num)
1443 {
1444         if (num <= 1)
1445                 return;
1446
1447         if (use_qsort)
1448                 qsort(fp, num, PTR_SIZE, file_compare);
1449         else {
1450                 struct file_struct **tmp = new_array(struct file_struct *,
1451                                                      (num+1) / 2);
1452                 fsort_tmp(fp, num, tmp);
1453                 free(tmp);
1454         }
1455 }
1456
1457 /* We take an entire set of sibling dirs from the sorted flist and link them
1458  * into the tree, setting the appropriate parent/child/sibling pointers. */
1459 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1460                              int dir_cnt)
1461 {
1462         int i;
1463         int32 *dp = NULL;
1464         int32 *parent_dp = parent_ndx < 0 ? NULL
1465                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1466
1467         flist_expand(dir_flist, dir_cnt);
1468         dir_flist->sorted = dir_flist->files;
1469
1470         for (i = 0; dir_cnt; i++) {
1471                 struct file_struct *file = from_flist->sorted[i];
1472
1473                 if (!S_ISDIR(file->mode))
1474                         continue;
1475
1476                 dir_flist->files[dir_flist->used++] = file;
1477                 dir_cnt--;
1478
1479                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1480                         continue;
1481
1482                 if (dp)
1483                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1484                 else if (parent_dp)
1485                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1486                 else
1487                         send_dir_ndx = dir_flist->used - 1;
1488
1489                 dp = F_DIR_NODE_P(file);
1490                 DIR_PARENT(dp) = parent_ndx;
1491                 DIR_FIRST_CHILD(dp) = -1;
1492         }
1493         if (dp)
1494                 DIR_NEXT_SIBLING(dp) = -1;
1495 }
1496
1497 /* This function is normally called by the sender, but the receiving side also
1498  * calls it from get_dirlist() with f set to -1 so that we just construct the
1499  * file list in memory without sending it over the wire.  Also, get_dirlist()
1500  * might call this with f set to -2, which also indicates that local filter
1501  * rules should be ignored. */
1502 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1503                            int flags)
1504 {
1505         struct dirent *di;
1506         unsigned remainder;
1507         char *p;
1508         DIR *d;
1509         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1510         int start = flist->used;
1511         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1512
1513         assert(flist != NULL);
1514
1515         if (!(d = opendir(fbuf))) {
1516                 io_error |= IOERR_GENERAL;
1517                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1518                 return;
1519         }
1520
1521         p = fbuf + len;
1522         if (len != 1 || *fbuf != '/')
1523                 *p++ = '/';
1524         *p = '\0';
1525         remainder = MAXPATHLEN - (p - fbuf);
1526
1527         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1528                 char *dname = d_name(di);
1529                 if (dname[0] == '.' && (dname[1] == '\0'
1530                     || (dname[1] == '.' && dname[2] == '\0')))
1531                         continue;
1532                 if (strlcpy(p, dname, remainder) >= remainder) {
1533                         io_error |= IOERR_GENERAL;
1534                         rprintf(FINFO,
1535                                 "cannot send long-named file %s\n",
1536                                 full_fname(fbuf));
1537                         continue;
1538                 }
1539                 if (dname[0] == '\0') {
1540                         io_error |= IOERR_GENERAL;
1541                         rprintf(FINFO,
1542                                 "cannot send file with empty name in %s\n",
1543                                 full_fname(fbuf));
1544                         continue;
1545                 }
1546
1547                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1548         }
1549
1550         fbuf[len] = '\0';
1551
1552         if (errno) {
1553                 io_error |= IOERR_GENERAL;
1554                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1555         }
1556
1557         closedir(d);
1558
1559         if (f >= 0 && recurse && !divert_dirs) {
1560                 int i, end = flist->used - 1;
1561                 /* send_if_directory() bumps flist->used, so use "end". */
1562                 for (i = start; i <= end; i++)
1563                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1564         }
1565 }
1566
1567 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1568                               char *start, char *limit, int flags, char name_type)
1569 {
1570         static char lastpath[MAXPATHLEN] = "";
1571         static int lastpath_len = 0;
1572         static struct file_struct *lastpath_struct = NULL;
1573         struct file_struct *file;
1574         item_list *relname_list;
1575         relnamecache **rnpp;
1576         int len, need_new_dir, depth = 0;
1577         struct filter_list_struct save_filter_list = filter_list;
1578
1579         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1580         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1581
1582         if (inc_recurse) {
1583                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1584                  && lastpath_len == limit - fname
1585                  && strncmp(lastpath, fname, lastpath_len) == 0)
1586                         need_new_dir = 0;
1587                 else
1588                         need_new_dir = 1;
1589         } else {
1590                 char *tp = fname, *lp = lastpath;
1591                 /* Skip any initial directories in our path that we
1592                  * have in common with lastpath. */
1593                 assert(start == fname);
1594                 for ( ; ; tp++, lp++) {
1595                         if (tp == limit) {
1596                                 if (*lp == '/' || *lp == '\0')
1597                                         goto done;
1598                                 break;
1599                         }
1600                         if (*lp != *tp)
1601                                 break;
1602                         if (*tp == '/') {
1603                                 start = tp;
1604                                 depth++;
1605                         }
1606                 }
1607                 need_new_dir = 1;
1608         }
1609
1610         if (need_new_dir) {
1611                 int save_copy_links = copy_links;
1612                 int save_xfer_dirs = xfer_dirs;
1613                 char *slash;
1614
1615                 copy_links = xfer_dirs = 1;
1616
1617                 *limit = '\0';
1618
1619                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1620                         *slash = '\0';
1621                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1622                         depth++;
1623                         if (!inc_recurse && file && S_ISDIR(file->mode))
1624                                 change_local_filter_dir(fname, strlen(fname), depth);
1625                         *slash = '/';
1626                 }
1627
1628                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1629                 if (inc_recurse) {
1630                         if (file && !S_ISDIR(file->mode))
1631                                 file = NULL;
1632                         lastpath_struct = file;
1633                 } else if (file && S_ISDIR(file->mode))
1634                         change_local_filter_dir(fname, strlen(fname), ++depth);
1635
1636                 strlcpy(lastpath, fname, sizeof lastpath);
1637                 lastpath_len = limit - fname;
1638
1639                 *limit = '/';
1640
1641                 copy_links = save_copy_links;
1642                 xfer_dirs = save_xfer_dirs;
1643
1644                 if (!inc_recurse)
1645                         goto done;
1646         }
1647
1648         if (!lastpath_struct)
1649                 goto done; /* dir must have vanished */
1650
1651         len = strlen(limit+1);
1652         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1653         if (!relname_list) {
1654                 if (!(relname_list = new0(item_list)))
1655                         out_of_memory("send_implied_dirs");
1656                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1657         }
1658         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1659         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1660                 out_of_memory("send_implied_dirs");
1661         (*rnpp)->name_type = name_type;
1662         strlcpy((*rnpp)->fname, limit+1, len + 1);
1663
1664 done:
1665         filter_list = save_filter_list;
1666 }
1667
1668 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1669 {
1670         char fbuf[MAXPATHLEN];
1671         item_list *relname_list;
1672         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1673         size_t j;
1674
1675         f_name(file, fbuf);
1676         dlen = strlen(fbuf);
1677
1678         if (!change_pathname(file, NULL, 0))
1679                 exit_cleanup(RERR_FILESELECT);
1680
1681         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1682
1683         if (file->flags & FLAG_CONTENT_DIR) {
1684                 if (one_file_system) {
1685                         STRUCT_STAT st;
1686                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1687                                 io_error |= IOERR_GENERAL;
1688                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1689                                         full_fname(fbuf));
1690                                 return;
1691                         }
1692                         filesystem_dev = st.st_dev;
1693                 }
1694                 send_directory(f, flist, fbuf, dlen, flags);
1695         }
1696
1697         if (!relative_paths)
1698                 return;
1699
1700         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1701         if (!relname_list)
1702                 return;
1703
1704         for (j = 0; j < relname_list->count; j++) {
1705                 char *slash;
1706                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1707                 char name_type = rnp->name_type;
1708
1709                 fbuf[dlen] = '/';
1710                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1711                 free(rnp);
1712                 if (len >= (int)sizeof fbuf)
1713                         continue; /* Impossible... */
1714
1715                 slash = strchr(fbuf+dlen+1, '/');
1716                 if (slash) {
1717                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1718                         continue;
1719                 }
1720
1721                 if (name_type != NORMAL_NAME) {
1722                         STRUCT_STAT st;
1723                         if (link_stat(fbuf, &st, 1) != 0) {
1724                                 io_error |= IOERR_GENERAL;
1725                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1726                                         full_fname(fbuf));
1727                                 continue;
1728                         }
1729                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1730                 } else
1731                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1732         }
1733
1734         free(relname_list);
1735 }
1736
1737 void send_extra_file_list(int f, int at_least)
1738 {
1739         struct file_list *flist;
1740         int64 start_write;
1741         uint16 prev_flags;
1742         int old_cnt, save_io_error = io_error;
1743
1744         if (flist_eof)
1745                 return;
1746
1747         /* Keep sending data until we have the requested number of
1748          * files in the upcoming file-lists. */
1749         old_cnt = cur_flist->used;
1750         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1751                 old_cnt += flist->used;
1752         while (file_total - old_cnt < at_least) {
1753                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1754                 int dir_ndx, dstart = dir_count;
1755                 const char *pathname = F_PATHNAME(file);
1756                 int32 *dp;
1757
1758                 flist = flist_new(0, "send_extra_file_list");
1759                 start_write = stats.total_written;
1760
1761                 if (unsort_ndx)
1762                         dir_ndx = F_NDX(file);
1763                 else
1764                         dir_ndx = send_dir_ndx;
1765                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1766                 flist->parent_ndx = dir_ndx;
1767
1768                 send1extra(f, file, flist);
1769                 prev_flags = file->flags;
1770                 dp = F_DIR_NODE_P(file);
1771
1772                 /* If there are any duplicate directory names that follow, we
1773                  * send all the dirs together in one file-list.  The dir_flist
1774                  * tree links all the child subdirs onto the last dup dir. */
1775                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1776                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1777                         send_dir_ndx = dir_ndx;
1778                         file = dir_flist->sorted[dir_ndx];
1779                         /* Try to avoid some duplicate scanning of identical dirs. */
1780                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1781                                 file->flags &= ~FLAG_CONTENT_DIR;
1782                         send1extra(f, file, flist);
1783                         prev_flags = file->flags;
1784                         dp = F_DIR_NODE_P(file);
1785                 }
1786
1787                 write_byte(f, 0);
1788
1789                 if (need_unsorted_flist) {
1790                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1791                                 out_of_memory("send_extra_file_list");
1792                         memcpy(flist->sorted, flist->files,
1793                                flist->used * sizeof (struct file_struct*));
1794                 } else
1795                         flist->sorted = flist->files;
1796
1797                 flist_sort_and_clean(flist, 0);
1798
1799                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1800                 flist_done_allocating(flist);
1801
1802                 file_total += flist->used;
1803                 stats.flist_size += stats.total_written - start_write;
1804                 stats.num_files += flist->used;
1805                 if (verbose > 3)
1806                         output_flist(flist);
1807
1808                 if (DIR_FIRST_CHILD(dp) >= 0) {
1809                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1810                         send_dir_depth++;
1811                 } else {
1812                         while (DIR_NEXT_SIBLING(dp) < 0) {
1813                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1814                                         write_ndx(f, NDX_FLIST_EOF);
1815                                         flist_eof = 1;
1816                                         change_local_filter_dir(NULL, 0, 0);
1817                                         goto finish;
1818                                 }
1819                                 send_dir_depth--;
1820                                 file = dir_flist->sorted[send_dir_ndx];
1821                                 dp = F_DIR_NODE_P(file);
1822                         }
1823                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1824                 }
1825         }
1826
1827   finish:
1828         if (io_error != save_io_error && !ignore_errors)
1829                 send_msg_int(MSG_IO_ERROR, io_error);
1830 }
1831
1832 struct file_list *send_file_list(int f, int argc, char *argv[])
1833 {
1834         static const char *lastdir;
1835         static int lastdir_len = -1;
1836         int len, dirlen;
1837         STRUCT_STAT st;
1838         char *p, *dir;
1839         struct file_list *flist;
1840         struct timeval start_tv, end_tv;
1841         int64 start_write;
1842         int use_ff_fd = 0;
1843         int disable_buffering;
1844         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1845         int reading_remotely = filesfrom_host != NULL;
1846         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1847 #ifdef ICONV_OPTION
1848                      | (filesfrom_convert ? RL_CONVERT : 0)
1849 #endif
1850                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1851         int implied_dot_dir = 0;
1852
1853         rprintf(FLOG, "building file list\n");
1854         if (show_filelist_p())
1855                 start_filelist_progress("building file list");
1856         else if (inc_recurse && verbose && !am_server)
1857                 rprintf(FCLIENT, "sending incremental file list\n");
1858
1859         start_write = stats.total_written;
1860         gettimeofday(&start_tv, NULL);
1861
1862         if (!orig_dir)
1863                 orig_dir = strdup(curr_dir);
1864
1865         if (relative_paths && protocol_version >= 30)
1866                 implied_dirs = 1; /* We send flagged implied dirs */
1867
1868 #ifdef SUPPORT_HARD_LINKS
1869         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1870                 init_hard_links();
1871 #endif
1872
1873         flist = cur_flist = flist_new(0, "send_file_list");
1874         if (inc_recurse) {
1875                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1876                 flags |= FLAG_DIVERT_DIRS;
1877         } else
1878                 dir_flist = cur_flist;
1879
1880         disable_buffering = io_start_buffering_out(f);
1881         if (filesfrom_fd >= 0) {
1882                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
1883                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
1884                                 full_fname(argv[0]));
1885                         exit_cleanup(RERR_FILESELECT);
1886                 }
1887                 use_ff_fd = 1;
1888         }
1889
1890         while (1) {
1891                 char fbuf[MAXPATHLEN], *fn, name_type;
1892
1893                 if (use_ff_fd) {
1894                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1895                                 break;
1896                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1897                 } else {
1898                         if (argc-- == 0)
1899                                 break;
1900                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1901                         if (sanitize_paths)
1902                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1903                 }
1904
1905                 len = strlen(fbuf);
1906                 if (relative_paths) {
1907                         /* We clean up fbuf below. */
1908                         name_type = NORMAL_NAME;
1909                 } else if (!len || fbuf[len - 1] == '/') {
1910                         if (len == 2 && fbuf[0] == '.') {
1911                                 /* Turn "./" into just "." rather than "./." */
1912                                 fbuf[--len] = '\0';
1913                         } else {
1914                                 if (len + 1 >= MAXPATHLEN)
1915                                         overflow_exit("send_file_list");
1916                                 fbuf[len++] = '.';
1917                                 fbuf[len] = '\0';
1918                         }
1919                         name_type = DOTDIR_NAME;
1920                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1921                     && (len == 2 || fbuf[len-3] == '/')) {
1922                         if (len + 2 >= MAXPATHLEN)
1923                                 overflow_exit("send_file_list");
1924                         fbuf[len++] = '/';
1925                         fbuf[len++] = '.';
1926                         fbuf[len] = '\0';
1927                         name_type = DOTDIR_NAME;
1928                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1929                         name_type = DOTDIR_NAME;
1930                 else
1931                         name_type = NORMAL_NAME;
1932
1933                 dir = NULL;
1934
1935                 if (!relative_paths) {
1936                         p = strrchr(fbuf, '/');
1937                         if (p) {
1938                                 *p = '\0';
1939                                 if (p == fbuf)
1940                                         dir = "/";
1941                                 else
1942                                         dir = fbuf;
1943                                 len -= p - fbuf + 1;
1944                                 fn = p + 1;
1945                         } else
1946                                 fn = fbuf;
1947                 } else {
1948                         if ((p = strstr(fbuf, "/./")) != NULL) {
1949                                 *p = '\0';
1950                                 if (p == fbuf)
1951                                         dir = "/";
1952                                 else {
1953                                         dir = fbuf;
1954                                         clean_fname(dir, 0);
1955                                 }
1956                                 fn = p + 3;
1957                                 while (*fn == '/')
1958                                         fn++;
1959                                 if (!*fn)
1960                                         *--fn = '\0'; /* ensure room for '.' */
1961                         } else
1962                                 fn = fbuf;
1963                         /* A leading ./ can be used in relative mode to affect
1964                          * the dest dir without its name being in the path. */
1965                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
1966                                 send_file_name(f, flist, ".", NULL,
1967                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
1968                                     ALL_FILTERS);
1969                                 implied_dot_dir = 1;
1970                         }
1971                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
1972                                             | CFN_DROP_TRAILING_DOT_DIR);
1973                         if (len == 1) {
1974                                 if (fn[0] == '/') {
1975                                         fn = "/.";
1976                                         len = 2;
1977                                         name_type = DOTDIR_NAME;
1978                                 } else if (fn[0] == '.')
1979                                         name_type = DOTDIR_NAME;
1980                         } else if (fn[len-1] == '/') {
1981                                 fn[--len] = '\0';
1982                                 if (len == 1 && *fn == '.')
1983                                         name_type = DOTDIR_NAME;
1984                                 else
1985                                         name_type = SLASH_ENDING_NAME;
1986                         }
1987                         /* Reject a ".." dir in the active part of the path. */
1988                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1989                                 if ((p[2] == '/' || p[2] == '\0')
1990                                  && (p == fn || p[-1] == '/')) {
1991                                         rprintf(FERROR,
1992                                             "found \"..\" dir in relative path: %s\n",
1993                                             fn);
1994                                         exit_cleanup(RERR_SYNTAX);
1995                                 }
1996                         }
1997                 }
1998
1999                 if (!*fn) {
2000                         len = 1;
2001                         fn = ".";
2002                         name_type = DOTDIR_NAME;
2003                 }
2004
2005                 dirlen = dir ? strlen(dir) : 0;
2006                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2007                         if (!change_pathname(NULL, dir, -dirlen))
2008                                 continue;
2009                         lastdir = pathname;
2010                         lastdir_len = pathname_len;
2011                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2012                         continue;
2013
2014                 if (fn != fbuf)
2015                         memmove(fbuf, fn, len + 1);
2016
2017                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2018                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2019                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2020                         io_error |= IOERR_GENERAL;
2021                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2022                                 full_fname(fbuf));
2023                         continue;
2024                 }
2025
2026                 /* A dot-dir should not be excluded! */
2027                 if (name_type != DOTDIR_NAME
2028                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2029                         continue;
2030
2031                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2032                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2033                         continue;
2034                 }
2035
2036                 if (inc_recurse && relative_paths && *fbuf) {
2037                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2038                                 if (p - fbuf == 1 && *fbuf == '.') {
2039                                         if ((fn = strchr(p+1, '/')) != NULL)
2040                                                 p = fn;
2041                                 } else
2042                                         fn = p;
2043                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2044                                 if (fn == p)
2045                                         continue;
2046                         }
2047                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2048                         /* Send the implied directories at the start of the
2049                          * source spec, so we get their permissions right. */
2050                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2051                 }
2052
2053                 if (one_file_system)
2054                         filesystem_dev = st.st_dev;
2055
2056                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2057                         struct file_struct *file;
2058                         file = send_file_name(f, flist, fbuf, &st,
2059                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2060                                               NO_FILTERS);
2061                         if (!file)
2062                                 continue;
2063                         if (inc_recurse) {
2064                                 if (name_type == DOTDIR_NAME) {
2065                                         if (send_dir_depth < 0) {
2066                                                 send_dir_depth = 0;
2067                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2068                                         }
2069                                         send_directory(f, flist, fbuf, len, flags);
2070                                 }
2071                         } else
2072                                 send_if_directory(f, flist, file, fbuf, len, flags);
2073                 } else
2074                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2075         }
2076
2077         gettimeofday(&end_tv, NULL);
2078         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2079                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2080         if (stats.flist_buildtime == 0)
2081                 stats.flist_buildtime = 1;
2082         start_tv = end_tv;
2083
2084         write_byte(f, 0); /* Indicate end of file list */
2085
2086 #ifdef SUPPORT_HARD_LINKS
2087         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2088                 idev_destroy();
2089 #endif
2090
2091         if (show_filelist_p())
2092                 finish_filelist_progress(flist);
2093
2094         gettimeofday(&end_tv, NULL);
2095         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2096                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2097
2098         /* When converting names, both sides keep an unsorted file-list array
2099          * because the names will differ on the sending and receiving sides
2100          * (both sides will use the unsorted index number for each item). */
2101
2102         /* Sort the list without removing any duplicates.  This allows the
2103          * receiving side to ask for whatever name it kept.  For incremental
2104          * recursion mode, the sender marks duplicate dirs so that it can
2105          * send them together in a single file-list. */
2106         if (need_unsorted_flist) {
2107                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2108                         out_of_memory("send_file_list");
2109                 memcpy(flist->sorted, flist->files,
2110                        flist->used * sizeof (struct file_struct*));
2111         } else
2112                 flist->sorted = flist->files;
2113         flist_sort_and_clean(flist, 0);
2114         file_total += flist->used;
2115
2116         if (numeric_ids <= 0 && !inc_recurse)
2117                 send_id_list(f);
2118
2119         /* send the io_error flag */
2120         if (protocol_version < 30)
2121                 write_int(f, ignore_errors ? 0 : io_error);
2122         else if (io_error && !ignore_errors)
2123                 send_msg_int(MSG_IO_ERROR, io_error);
2124
2125         if (disable_buffering)
2126                 io_end_buffering_out();
2127
2128         stats.flist_size = stats.total_written - start_write;
2129         stats.num_files = flist->used;
2130
2131         if (verbose > 3)
2132                 output_flist(flist);
2133
2134         if (verbose > 2)
2135                 rprintf(FINFO, "send_file_list done\n");
2136
2137         if (inc_recurse) {
2138                 send_dir_depth = 1;
2139                 add_dirs_to_tree(-1, flist, dir_count);
2140                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2141                         flist->parent_ndx = -1;
2142                 flist_done_allocating(flist);
2143                 if (send_dir_ndx < 0) {
2144                         write_ndx(f, NDX_FLIST_EOF);
2145                         flist_eof = 1;
2146                 }
2147                 else if (file_total == 1) {
2148                         /* If we're creating incremental file-lists and there
2149                          * was just 1 item in the first file-list, send 1 more
2150                          * file-list to check if this is a 1-file xfer. */
2151                         send_extra_file_list(f, 1);
2152                 }
2153         }
2154
2155         return flist;
2156 }
2157
2158 struct file_list *recv_file_list(int f)
2159 {
2160         struct file_list *flist;
2161         int dstart, flags;
2162         int64 start_read;
2163
2164         if (!first_flist)
2165                 rprintf(FLOG, "receiving file list\n");
2166         if (show_filelist_p())
2167                 start_filelist_progress("receiving file list");
2168         else if (inc_recurse && verbose && !am_server && !first_flist)
2169                 rprintf(FCLIENT, "receiving incremental file list\n");
2170
2171         start_read = stats.total_read;
2172
2173 #ifdef SUPPORT_HARD_LINKS
2174         if (preserve_hard_links && !first_flist)
2175                 init_hard_links();
2176 #endif
2177
2178         flist = flist_new(0, "recv_file_list");
2179
2180         if (inc_recurse) {
2181                 if (flist->ndx_start == 1)
2182                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2183                 dstart = dir_flist->used;
2184         } else {
2185                 dir_flist = flist;
2186                 dstart = 0;
2187         }
2188
2189         while ((flags = read_byte(f)) != 0) {
2190                 struct file_struct *file;
2191
2192                 flist_expand(flist, 1);
2193
2194                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2195                         flags |= read_byte(f) << 8;
2196                 file = recv_file_entry(flist, flags, f);
2197
2198                 if (inc_recurse && S_ISDIR(file->mode)) {
2199                         flist_expand(dir_flist, 1);
2200                         dir_flist->files[dir_flist->used++] = file;
2201                 }
2202
2203                 flist->files[flist->used++] = file;
2204
2205                 maybe_emit_filelist_progress(flist->used);
2206
2207                 if (verbose > 2) {
2208                         rprintf(FINFO, "recv_file_name(%s)\n",
2209                                 f_name(file, NULL));
2210                 }
2211         }
2212         file_total += flist->used;
2213
2214         if (verbose > 2)
2215                 rprintf(FINFO, "received %d names\n", flist->used);
2216
2217         if (show_filelist_p())
2218                 finish_filelist_progress(flist);
2219
2220         if (need_unsorted_flist) {
2221                 /* Create an extra array of index pointers that we can sort for
2222                  * the generator's use (for wading through the files in sorted
2223                  * order and for calling flist_find()).  We keep the "files"
2224                  * list unsorted for our exchange of index numbers with the
2225                  * other side (since their names may not sort the same). */
2226                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2227                         out_of_memory("recv_file_list");
2228                 memcpy(flist->sorted, flist->files,
2229                        flist->used * sizeof (struct file_struct*));
2230                 if (inc_recurse && dir_flist->used > dstart) {
2231                         static int dir_flist_malloced = 0;
2232                         if (dir_flist_malloced < dir_flist->malloced) {
2233                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2234                                                         struct file_struct *,
2235                                                         dir_flist->malloced);
2236                                 dir_flist_malloced = dir_flist->malloced;
2237                         }
2238                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2239                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2240                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2241                 }
2242         } else {
2243                 flist->sorted = flist->files;
2244                 if (inc_recurse && dir_flist->used > dstart) {
2245                         dir_flist->sorted = dir_flist->files;
2246                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2247                 }
2248         }
2249
2250         if (inc_recurse)
2251                 flist_done_allocating(flist);
2252         else if (f >= 0)
2253                 recv_id_list(f, flist);
2254
2255         flist_sort_and_clean(flist, relative_paths);
2256
2257         if (protocol_version < 30) {
2258                 /* Recv the io_error flag */
2259                 if (ignore_errors)
2260                         read_int(f);
2261                 else
2262                         io_error |= read_int(f);
2263         } else if (inc_recurse && flist->ndx_start == 1) {
2264                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2265                         flist->parent_ndx = -1;
2266         }
2267
2268         if (verbose > 3)
2269                 output_flist(flist);
2270
2271         if (verbose > 2)
2272                 rprintf(FINFO, "recv_file_list done\n");
2273
2274         stats.flist_size += stats.total_read - start_read;
2275         stats.num_files += flist->used;
2276
2277         return flist;
2278 }
2279
2280 /* This is only used once by the receiver if the very first file-list
2281  * has exactly one item in it. */
2282 void recv_additional_file_list(int f)
2283 {
2284         struct file_list *flist;
2285         int ndx = read_ndx(f);
2286         if (ndx == NDX_FLIST_EOF) {
2287                 flist_eof = 1;
2288                 change_local_filter_dir(NULL, 0, 0);
2289         } else {
2290                 ndx = NDX_FLIST_OFFSET - ndx;
2291                 if (ndx < 0 || ndx >= dir_flist->used) {
2292                         ndx = NDX_FLIST_OFFSET - ndx;
2293                         rprintf(FERROR,
2294                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2295                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2296                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2297                         exit_cleanup(RERR_PROTOCOL);
2298                 }
2299                 if (verbose > 3) {
2300                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2301                                 who_am_i(), ndx);
2302                 }
2303                 flist = recv_file_list(f);
2304                 flist->parent_ndx = ndx;
2305         }
2306 }
2307
2308 /* Search for an identically-named item in the file list.  Note that the
2309  * items must agree in their directory-ness, or no match is returned. */
2310 int flist_find(struct file_list *flist, struct file_struct *f)
2311 {
2312         int low = flist->low, high = flist->high;
2313         int diff, mid, mid_up;
2314
2315         while (low <= high) {
2316                 mid = (low + high) / 2;
2317                 if (F_IS_ACTIVE(flist->sorted[mid]))
2318                         mid_up = mid;
2319                 else {
2320                         /* Scan for the next non-empty entry using the cached
2321                          * distance values.  If the value isn't fully up-to-
2322                          * date, update it. */
2323                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2324                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2325                                 do {
2326                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2327                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2328                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2329                         }
2330                         if (mid_up > high) {
2331                                 /* If there's nothing left above us, set high to
2332                                  * a non-empty entry below us and continue. */
2333                                 high = mid - (int)flist->sorted[mid]->len32;
2334                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2335                                         do {
2336                                             high -= (int)flist->sorted[high]->len32;
2337                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2338                                         flist->sorted[mid]->len32 = mid - high;
2339                                 }
2340                                 continue;
2341                         }
2342                 }
2343                 diff = f_name_cmp(flist->sorted[mid_up], f);
2344                 if (diff == 0) {
2345                         if (protocol_version < 29
2346                             && S_ISDIR(flist->sorted[mid_up]->mode)
2347                             != S_ISDIR(f->mode))
2348                                 return -1;
2349                         return mid_up;
2350                 }
2351                 if (diff < 0)
2352                         low = mid_up + 1;
2353                 else
2354                         high = mid - 1;
2355         }
2356         return -1;
2357 }
2358
2359 /*
2360  * Free up any resources a file_struct has allocated
2361  * and clear the file.
2362  */
2363 void clear_file(struct file_struct *file)
2364 {
2365         /* The +1 zeros out the first char of the basename. */
2366         memset(file, 0, FILE_STRUCT_LEN + 1);
2367         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2368          * entry.  Likewise for len32 in the opposite direction.  We assume
2369          * that we're alone for now since flist_find() will adjust the counts
2370          * it runs into that aren't up-to-date. */
2371         file->len32 = F_DEPTH(file) = 1;
2372 }
2373
2374 /* Allocate a new file list. */
2375 struct file_list *flist_new(int flags, char *msg)
2376 {
2377         struct file_list *flist;
2378
2379         if (!(flist = new0(struct file_list)))
2380                 out_of_memory(msg);
2381
2382         if (flags & FLIST_TEMP) {
2383                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2384                                                 out_of_memory, POOL_INTERN)))
2385                         out_of_memory(msg);
2386         } else {
2387                 /* This is a doubly linked list with prev looping back to
2388                  * the end of the list, but the last next pointer is NULL. */
2389                 if (!first_flist) {
2390                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2391                                                 out_of_memory, POOL_INTERN);
2392                         if (!flist->file_pool)
2393                                 out_of_memory(msg);
2394
2395                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2396
2397                         first_flist = cur_flist = flist->prev = flist;
2398                 } else {
2399                         struct file_list *prev = first_flist->prev;
2400
2401                         flist->file_pool = first_flist->file_pool;
2402
2403                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2404                         flist->flist_num = prev->flist_num + 1;
2405
2406                         flist->prev = prev;
2407                         prev->next = first_flist->prev = flist;
2408                 }
2409                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2410                 flist_cnt++;
2411         }
2412
2413         return flist;
2414 }
2415
2416 /* Free up all elements in a flist. */
2417 void flist_free(struct file_list *flist)
2418 {
2419         if (!flist->prev) {
2420                 /* Was FLIST_TEMP dir-list. */
2421         } else if (flist == flist->prev) {
2422                 first_flist = cur_flist = NULL;
2423                 file_total = 0;
2424                 flist_cnt = 0;
2425         } else {
2426                 if (flist == cur_flist)
2427                         cur_flist = flist->next;
2428                 if (flist == first_flist)
2429                         first_flist = first_flist->next;
2430                 else {
2431                         flist->prev->next = flist->next;
2432                         if (!flist->next)
2433                                 flist->next = first_flist;
2434                 }
2435                 flist->next->prev = flist->prev;
2436                 file_total -= flist->used;
2437                 flist_cnt--;
2438         }
2439
2440         if (!flist->prev || !flist_cnt)
2441                 pool_destroy(flist->file_pool);
2442         else
2443                 pool_free_old(flist->file_pool, flist->pool_boundary);
2444
2445         if (flist->sorted && flist->sorted != flist->files)
2446                 free(flist->sorted);
2447         free(flist->files);
2448         free(flist);
2449 }
2450
2451 /* This routine ensures we don't have any duplicate names in our file list.
2452  * duplicate names can cause corruption because of the pipelining. */
2453 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2454 {
2455         char fbuf[MAXPATHLEN];
2456         int i, prev_i;
2457
2458         if (!flist)
2459                 return;
2460         if (flist->used == 0) {
2461                 flist->high = -1;
2462                 flist->low = 0;
2463                 return;
2464         }
2465
2466         fsort(flist->sorted, flist->used);
2467
2468         if (!am_sender || inc_recurse) {
2469                 for (i = prev_i = 0; i < flist->used; i++) {
2470                         if (F_IS_ACTIVE(flist->sorted[i])) {
2471                                 prev_i = i;
2472                                 break;
2473                         }
2474                 }
2475                 flist->low = prev_i;
2476         } else {
2477                 i = prev_i = flist->used - 1;
2478                 flist->low = 0;
2479         }
2480
2481         while (++i < flist->used) {
2482                 int j;
2483                 struct file_struct *file = flist->sorted[i];
2484
2485                 if (!F_IS_ACTIVE(file))
2486                         continue;
2487                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2488                         j = prev_i;
2489                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2490                         int save_mode = file->mode;
2491                         /* Make sure that this directory doesn't duplicate a
2492                          * non-directory earlier in the list. */
2493                         flist->high = prev_i;
2494                         file->mode = S_IFREG;
2495                         j = flist_find(flist, file);
2496                         file->mode = save_mode;
2497                 } else
2498                         j = -1;
2499                 if (j >= 0) {
2500                         int keep, drop;
2501                         /* If one is a dir and the other is not, we want to
2502                          * keep the dir because it might have contents in the
2503                          * list.  Otherwise keep the first one. */
2504                         if (S_ISDIR(file->mode)) {
2505                                 struct file_struct *fp = flist->sorted[j];
2506                                 if (!S_ISDIR(fp->mode))
2507                                         keep = i, drop = j;
2508                                 else {
2509                                         if (am_sender)
2510                                                 file->flags |= FLAG_DUPLICATE;
2511                                         else { /* Make sure we merge our vital flags. */
2512                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2513                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2514                                         }
2515                                         keep = j, drop = i;
2516                                 }
2517                         } else
2518                                 keep = j, drop = i;
2519
2520                         if (!am_sender) {
2521                                 if (verbose > 1) {
2522                                         rprintf(FINFO,
2523                                             "removing duplicate name %s from file list (%d)\n",
2524                                             f_name(file, fbuf), drop + flist->ndx_start);
2525                                 }
2526                                 clear_file(flist->sorted[drop]);
2527                         }
2528
2529                         if (keep == i) {
2530                                 if (flist->low == drop) {
2531                                         for (j = drop + 1;
2532                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2533                                              j++) {}
2534                                         flist->low = j;
2535                                 }
2536                                 prev_i = i;
2537                         }
2538                 } else
2539                         prev_i = i;
2540         }
2541         flist->high = prev_i;
2542
2543         if (strip_root) {
2544                 /* We need to strip off the leading slashes for relative
2545                  * paths, but this must be done _after_ the sorting phase. */
2546                 for (i = flist->low; i <= flist->high; i++) {
2547                         struct file_struct *file = flist->sorted[i];
2548
2549                         if (!file->dirname)
2550                                 continue;
2551                         while (*file->dirname == '/')
2552                                 file->dirname++;
2553                         if (!*file->dirname)
2554                                 file->dirname = NULL;
2555                 }
2556         }
2557
2558         if (prune_empty_dirs && !am_sender) {
2559                 int j, prev_depth = 0;
2560
2561                 prev_i = 0; /* It's OK that this isn't really true. */
2562
2563                 for (i = flist->low; i <= flist->high; i++) {
2564                         struct file_struct *fp, *file = flist->sorted[i];
2565
2566                         /* This temporarily abuses the F_DEPTH() value for a
2567                          * directory that is in a chain that might get pruned.
2568                          * We restore the old value if it gets a reprieve. */
2569                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2570                                 /* Dump empty dirs when coming back down. */
2571                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2572                                         fp = flist->sorted[prev_i];
2573                                         if (F_DEPTH(fp) >= 0)
2574                                                 break;
2575                                         prev_i = -F_DEPTH(fp)-1;
2576                                         clear_file(fp);
2577                                 }
2578                                 prev_depth = F_DEPTH(file);
2579                                 if (is_excluded(f_name(file, fbuf), 1,
2580                                                        ALL_FILTERS)) {
2581                                         /* Keep dirs through this dir. */
2582                                         for (j = prev_depth-1; ; j--) {
2583                                                 fp = flist->sorted[prev_i];
2584                                                 if (F_DEPTH(fp) >= 0)
2585                                                         break;
2586                                                 prev_i = -F_DEPTH(fp)-1;
2587                                                 F_DEPTH(fp) = j;
2588                                         }
2589                                 } else
2590                                         F_DEPTH(file) = -prev_i-1;
2591                                 prev_i = i;
2592                         } else {
2593                                 /* Keep dirs through this non-dir. */
2594                                 for (j = prev_depth; ; j--) {
2595                                         fp = flist->sorted[prev_i];
2596                                         if (F_DEPTH(fp) >= 0)
2597                                                 break;
2598                                         prev_i = -F_DEPTH(fp)-1;
2599                                         F_DEPTH(fp) = j;
2600                                 }
2601                         }
2602                 }
2603                 /* Dump all remaining empty dirs. */
2604                 while (1) {
2605                         struct file_struct *fp = flist->sorted[prev_i];
2606                         if (F_DEPTH(fp) >= 0)
2607                                 break;
2608                         prev_i = -F_DEPTH(fp)-1;
2609                         clear_file(fp);
2610                 }
2611
2612                 for (i = flist->low; i <= flist->high; i++) {
2613                         if (F_IS_ACTIVE(flist->sorted[i]))
2614                                 break;
2615                 }
2616                 flist->low = i;
2617                 for (i = flist->high; i >= flist->low; i--) {
2618                         if (F_IS_ACTIVE(flist->sorted[i]))
2619                                 break;
2620                 }
2621                 flist->high = i;
2622         }
2623 }
2624
2625 static void output_flist(struct file_list *flist)
2626 {
2627         char uidbuf[16], gidbuf[16], depthbuf[16];
2628         struct file_struct *file;
2629         const char *root, *dir, *slash, *name, *trail;
2630         const char *who = who_am_i();
2631         int i;
2632
2633         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2634                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2635         for (i = 0; i < flist->used; i++) {
2636                 file = flist->files[i];
2637                 if ((am_root || am_sender) && uid_ndx) {
2638                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2639                                  F_OWNER(file));
2640                 } else
2641                         *uidbuf = '\0';
2642                 if (gid_ndx) {
2643                         static char parens[] = "(\0)\0\0\0";
2644                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2645                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2646                                  pp, F_GROUP(file), pp + 2);
2647                 } else
2648                         *gidbuf = '\0';
2649                 if (!am_sender)
2650                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2651                 if (F_IS_ACTIVE(file)) {
2652                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2653                         if ((dir = file->dirname) == NULL)
2654                                 dir = slash = "";
2655                         else
2656                                 slash = "/";
2657                         name = file->basename;
2658                         trail = S_ISDIR(file->mode) ? "/" : "";
2659                 } else
2660                         root = dir = slash = name = trail = "";
2661                 rprintf(FINFO,
2662                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2663                         who, i + flist->ndx_start,
2664                         root, dir, slash, name, trail,
2665                         (int)file->mode, (double)F_LENGTH(file),
2666                         uidbuf, gidbuf, file->flags);
2667         }
2668 }
2669
2670 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2671 enum fnc_type { t_PATH, t_ITEM };
2672
2673 static int found_prefix;
2674
2675 /* Compare the names of two file_struct entities, similar to how strcmp()
2676  * would do if it were operating on the joined strings.
2677  *
2678  * Some differences beginning with protocol_version 29: (1) directory names
2679  * are compared with an assumed trailing slash so that they compare in a
2680  * way that would cause them to sort immediately prior to any content they
2681  * may have; (2) a directory of any name compares after a non-directory of
2682  * any name at the same depth; (3) a directory with name "." compares prior
2683  * to anything else.  These changes mean that a directory and a non-dir
2684  * with the same name will not compare as equal (protocol_version >= 29).
2685  *
2686  * The dirname component can be an empty string, but the basename component
2687  * cannot (and never is in the current codebase).  The basename component
2688  * may be NULL (for a removed item), in which case it is considered to be
2689  * after any existing item. */
2690 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2691 {
2692         int dif;
2693         const uchar *c1, *c2;
2694         enum fnc_state state1, state2;
2695         enum fnc_type type1, type2;
2696         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2697
2698         if (!f1 || !F_IS_ACTIVE(f1)) {
2699                 if (!f2 || !F_IS_ACTIVE(f2))
2700                         return 0;
2701                 return -1;
2702         }
2703         if (!f2 || !F_IS_ACTIVE(f2))
2704                 return 1;
2705
2706         c1 = (uchar*)f1->dirname;
2707         c2 = (uchar*)f2->dirname;
2708         if (c1 == c2)
2709                 c1 = c2 = NULL;
2710         if (!c1) {
2711                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2712                 c1 = (const uchar*)f1->basename;
2713                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2714                         type1 = t_ITEM;
2715                         state1 = s_TRAILING;
2716                         c1 = (uchar*)"";
2717                 } else
2718                         state1 = s_BASE;
2719         } else {
2720                 type1 = t_path;
2721                 state1 = s_DIR;
2722         }
2723         if (!c2) {
2724                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2725                 c2 = (const uchar*)f2->basename;
2726                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2727                         type2 = t_ITEM;
2728                         state2 = s_TRAILING;
2729                         c2 = (uchar*)"";
2730                 } else
2731                         state2 = s_BASE;
2732         } else {
2733                 type2 = t_path;
2734                 state2 = s_DIR;
2735         }
2736
2737         if (type1 != type2)
2738                 return type1 == t_PATH ? 1 : -1;
2739
2740         do {
2741                 if (!*c1) {
2742                         switch (state1) {
2743                         case s_DIR:
2744                                 state1 = s_SLASH;
2745                                 c1 = (uchar*)"/";
2746                                 break;
2747                         case s_SLASH:
2748                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2749                                 c1 = (const uchar*)f1->basename;
2750                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2751                                         type1 = t_ITEM;
2752                                         state1 = s_TRAILING;
2753                                         c1 = (uchar*)"";
2754                                 } else
2755                                         state1 = s_BASE;
2756                                 break;
2757                         case s_BASE:
2758                                 state1 = s_TRAILING;
2759                                 if (type1 == t_PATH) {
2760                                         c1 = (uchar*)"/";
2761                                         break;
2762                                 }
2763                                 /* FALL THROUGH */
2764                         case s_TRAILING:
2765                                 type1 = t_ITEM;
2766                                 break;
2767                         }
2768                         if (*c2 && type1 != type2)
2769                                 return type1 == t_PATH ? 1 : -1;
2770                 }
2771                 if (!*c2) {
2772                         switch (state2) {
2773                         case s_DIR:
2774                                 state2 = s_SLASH;
2775                                 c2 = (uchar*)"/";
2776                                 break;
2777                         case s_SLASH:
2778                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2779                                 c2 = (const uchar*)f2->basename;
2780                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2781                                         type2 = t_ITEM;
2782                                         state2 = s_TRAILING;
2783                                         c2 = (uchar*)"";
2784                                 } else
2785                                         state2 = s_BASE;
2786                                 break;
2787                         case s_BASE:
2788                                 state2 = s_TRAILING;
2789                                 if (type2 == t_PATH) {
2790                                         c2 = (uchar*)"/";
2791                                         break;
2792                                 }
2793                                 /* FALL THROUGH */
2794                         case s_TRAILING:
2795                                 found_prefix = 1;
2796                                 if (!*c1)
2797                                         return 0;
2798                                 type2 = t_ITEM;
2799                                 break;
2800                         }
2801                         if (type1 != type2)
2802                                 return type1 == t_PATH ? 1 : -1;
2803                 }
2804         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2805
2806         return dif;
2807 }
2808
2809 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2810  * not match if f2's basename is not an exact match of a path element in f1.
2811  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2812 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2813 {
2814         found_prefix = 0;
2815         f_name_cmp(f1, f2);
2816         return found_prefix;
2817 }
2818
2819 char *f_name_buf(void)
2820 {
2821         static char names[5][MAXPATHLEN];
2822         static unsigned int n;
2823
2824         n = (n + 1) % (sizeof names / sizeof names[0]);
2825
2826         return names[n];
2827 }
2828
2829 /* Return a copy of the full filename of a flist entry, using the indicated
2830  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2831  * done because we checked the size when creating the file_struct entry.
2832  */
2833 char *f_name(const struct file_struct *f, char *fbuf)
2834 {
2835         if (!f || !F_IS_ACTIVE(f))
2836                 return NULL;
2837
2838         if (!fbuf)
2839                 fbuf = f_name_buf();
2840
2841         if (f->dirname) {
2842                 int len = strlen(f->dirname);
2843                 memcpy(fbuf, f->dirname, len);
2844                 fbuf[len] = '/';
2845                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2846         } else
2847                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2848
2849         return fbuf;
2850 }
2851
2852 /* Do a non-recursive scan of the named directory, possibly ignoring all
2853  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2854  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2855  * buffer (the functions we call will append names onto the end, but the old
2856  * dir value will be restored on exit). */
2857 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2858 {
2859         struct file_list *dirlist;
2860         char dirbuf[MAXPATHLEN];
2861         int save_recurse = recurse;
2862         int save_xfer_dirs = xfer_dirs;
2863         int save_prune_empty_dirs = prune_empty_dirs;
2864
2865         if (dlen < 0) {
2866                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2867                 if (dlen >= MAXPATHLEN)
2868                         return NULL;
2869                 dirname = dirbuf;
2870         }
2871
2872         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2873
2874         recurse = 0;
2875         xfer_dirs = 1;
2876         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2877         xfer_dirs = save_xfer_dirs;
2878         recurse = save_recurse;
2879         if (do_progress)
2880                 flist_count_offset += dirlist->used;
2881
2882         prune_empty_dirs = 0;
2883         dirlist->sorted = dirlist->files;
2884         flist_sort_and_clean(dirlist, 0);
2885         prune_empty_dirs = save_prune_empty_dirs;
2886
2887         if (verbose > 3)
2888                 output_flist(dirlist);
2889
2890         return dirlist;
2891 }