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 am_root;
  29 extern int am_server;
  30 extern int am_daemon;
  31 extern int am_sender;
  32 extern int am_generator;
  33 extern int inc_recurse;
  34 extern int always_checksum;
  35 extern int module_id;
  36 extern int ignore_errors;
  37 extern int numeric_ids;
  38 extern int recurse;
  39 extern int use_qsort;
  40 extern int xfer_dirs;
  41 extern int filesfrom_fd;
  42 extern int one_file_system;
  43 extern int copy_dirlinks;
  44 extern int keep_dirlinks;
  45 extern int preserve_uid;
  46 extern int preserve_gid;
  47 extern int preserve_acls;
  48 extern int preserve_xattrs;
  49 extern int preserve_links;
  50 extern int preserve_hard_links;
  51 extern int preserve_devices;
  52 extern int preserve_specials;
  53 extern int uid_ndx;
  54 extern int gid_ndx;
  55 extern int eol_nulls;
  56 extern int relative_paths;
  57 extern int implied_dirs;
  58 extern int file_extra_cnt;
  59 extern int ignore_perishable;
  60 extern int non_perishable_cnt;
  61 extern int prune_empty_dirs;
  62 extern int copy_links;
  63 extern int copy_unsafe_links;
  64 extern int protocol_version;
  65 extern int sanitize_paths;
  66 extern int munge_symlinks;
  67 extern int need_unsorted_flist;
  68 extern int output_needs_newline;
  69 extern int unsort_ndx;
  70 extern struct stats stats;
  71 extern char *filesfrom_host;
  72
  73 extern char curr_dir[MAXPATHLEN];
  74
  75 extern struct chmod_mode_struct *chmod_modes;
  76
  77 extern struct filter_list_struct filter_list;
  78 extern struct filter_list_struct daemon_filter_list;
  79
  80 #ifdef ICONV_OPTION
  81 extern int filesfrom_convert;
  82 extern iconv_t ic_send, ic_recv;
  83 #endif
  84
  85 #define PTR_SIZE (sizeof (struct file_struct *))
  86
  87 int io_error;
  88 int checksum_len;
  89 dev_t filesystem_dev; /* used to implement -x */
  90
  91 struct file_list *cur_flist, *first_flist, *dir_flist;
  92 int send_dir_ndx = -1, send_dir_depth = -1;
  93 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  94 int file_total = 0; /* total of all active items over all file-lists */
  95 int flist_eof = 0; /* all the file-lists are now known */
  96
  97 #define NORMAL_NAME 0
  98 #define SLASH_ENDING_NAME 1
  99 #define DOTDIR_NAME 2
 100
 101 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 102  * internally, even if this platform does not allow files to have 64-bit inums.
 103  * The only exception is if we're on a platform with no 64-bit type at all.
 104  *
 105  * Because we use read_longint() to get these off the wire, if you transfer
 106  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 107  * machine with no 64-bit types then you will get an overflow error.
 108  *
 109  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 110  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 111  * be truncated.  But it's a kind of silly thing to do anyhow. */
 112
 113 /* The tmp_* vars are used as a cache area by make_file() to store data
 114  * that the sender doesn't need to remember in its file list.  The data
 115  * will survive just long enough to be used by send_file_entry(). */
 116 static dev_t tmp_rdev;
 117 #ifdef SUPPORT_HARD_LINKS
 118 static int64 tmp_dev, tmp_ino;
 119 #endif
 120 static char tmp_sum[MAX_DIGEST_LEN];
 121
 122 static char empty_sum[MAX_DIGEST_LEN];
 123 static int flist_count_offset; /* for --delete --progress */
 124 static int dir_count = 0;
 125
 126 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 127 static void output_flist(struct file_list *flist);
 128
 129 void init_flist(void)
 130 {
 131         if (DEBUG_GTE(FLIST, 4)) {
 132                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 133                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 134         }
 135         checksum_len = protocol_version < 21 ? 2
 136                      : protocol_version < 30 ? MD4_DIGEST_LEN
 137                      : MD5_DIGEST_LEN;
 138 }
 139
 140 static int show_filelist_p(void)
 141 {
 142         return INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse;
 143 }
 144
 145 static void start_filelist_progress(char *kind)
 146 {
 147         rprintf(FCLIENT, "%s ... ", kind);
 148         output_needs_newline = 1;
 149         rflush(FINFO);
 150 }
 151
 152 static void emit_filelist_progress(int count)
 153 {
 154         rprintf(FCLIENT, " %d files...\r", count);
 155 }
 156
 157 static void maybe_emit_filelist_progress(int count)
 158 {
 159         if (INFO_GTE(FLIST, 2) && show_filelist_p() && (count % 100) == 0)
 160                 emit_filelist_progress(count);
 161 }
 162
 163 static void finish_filelist_progress(const struct file_list *flist)
 164 {
 165         if (INFO_GTE(FLIST, 2)) {
 166                 /* This overwrites the progress line */
 167                 rprintf(FINFO, "%d file%sto consider\n",
 168                         flist->used, flist->used == 1 ? " " : "s ");
 169         } else {
 170                 output_needs_newline = 0;
 171                 rprintf(FINFO, "done\n");
 172         }
 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 (INFO_GTE(SYMSAFE, 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 (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
 320                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n",
 321                     who_am_i(),
 322                     big_num(sizeof flist->files[0] * flist->malloced, 0),
 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 #ifdef SUPPORT_HARD_LINKS
 403         int first_hlink_ndx = -1;
 404 #endif
 405         int l1, l2;
 406         int xflags;
 407
 408         /* Initialize starting value of xflags. */
 409         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 410                 dir_count++;
 411                 if (file->flags & FLAG_CONTENT_DIR)
 412                         xflags = file->flags & FLAG_TOP_DIR;
 413                 else if (file->flags & FLAG_IMPLIED_DIR)
 414                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 415                 else
 416                         xflags = XMIT_NO_CONTENT_DIR;
 417         } else
 418                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 419
 420         if (file->mode == mode)
 421                 xflags |= XMIT_SAME_MODE;
 422         else
 423                 mode = file->mode;
 424
 425         if ((preserve_devices && IS_DEVICE(mode))
 426          || (preserve_specials && IS_SPECIAL(mode))) {
 427                 if (protocol_version < 28) {
 428                         if (tmp_rdev == rdev)
 429                                 xflags |= XMIT_SAME_RDEV_pre28;
 430                         else
 431                                 rdev = tmp_rdev;
 432                 } else {
 433                         rdev = tmp_rdev;
 434                         if ((uint32)major(rdev) == rdev_major)
 435                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 436                         else
 437                                 rdev_major = major(rdev);
 438                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 439                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 440                 }
 441         } else if (protocol_version < 28)
 442                 rdev = MAKEDEV(0, 0);
 443         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 444                 xflags |= XMIT_SAME_UID;
 445         else {
 446                 uid = F_OWNER(file);
 447                 if (!numeric_ids) {
 448                         user_name = add_uid(uid);
 449                         if (inc_recurse && user_name)
 450                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 451                 }
 452         }
 453         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 454                 xflags |= XMIT_SAME_GID;
 455         else {
 456                 gid = F_GROUP(file);
 457                 if (!numeric_ids) {
 458                         group_name = add_gid(gid);
 459                         if (inc_recurse && group_name)
 460                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 461                 }
 462         }
 463         if (file->modtime == modtime)
 464                 xflags |= XMIT_SAME_TIME;
 465         else
 466                 modtime = file->modtime;
 467
 468 #ifdef SUPPORT_HARD_LINKS
 469         if (tmp_dev != 0) {
 470                 if (protocol_version >= 30) {
 471                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 472                         first_hlink_ndx = (int32)(long)np->data - 1;
 473                         if (first_hlink_ndx < 0) {
 474                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 475                                 xflags |= XMIT_HLINK_FIRST;
 476                         }
 477                         if (DEBUG_GTE(HLINK, 1)) {
 478                                 if (first_hlink_ndx >= 0) {
 479                                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 480                                                 who_am_i(), first_ndx + ndx, first_hlink_ndx,
 481                                                 first_hlink_ndx >= first_ndx ? "" : "un");
 482                                 } else if (DEBUG_GTE(HLINK, 3)) {
 483                                         rprintf(FINFO, "[%s] dev:inode for #%d is %s:%s\n",
 484                                                 who_am_i(), first_ndx + ndx,
 485                                                 big_num(tmp_dev, 0), big_num(tmp_ino, 0));
 486                                 }
 487                         }
 488                 } else {
 489                         if (tmp_dev == dev) {
 490                                 if (protocol_version >= 28)
 491                                         xflags |= XMIT_SAME_DEV_pre30;
 492                         } else
 493                                 dev = tmp_dev;
 494                 }
 495                 xflags |= XMIT_HLINKED;
 496         }
 497 #endif
 498
 499         for (l1 = 0;
 500             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 501             l1++) {}
 502         l2 = strlen(fname+l1);
 503
 504         if (l1 > 0)
 505                 xflags |= XMIT_SAME_NAME;
 506         if (l2 > 255)
 507                 xflags |= XMIT_LONG_NAME;
 508
 509         /* We must make sure we don't send a zero flag byte or the
 510          * other end will terminate the flist transfer.  Note that
 511          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 512          * it's harmless way to add a bit to the first flag byte. */
 513         if (protocol_version >= 28) {
 514                 if (!xflags && !S_ISDIR(mode))
 515                         xflags |= XMIT_TOP_DIR;
 516                 if ((xflags & 0xFF00) || !xflags) {
 517                         xflags |= XMIT_EXTENDED_FLAGS;
 518                         write_shortint(f, xflags);
 519                 } else
 520                         write_byte(f, xflags);
 521         } else {
 522                 if (!(xflags & 0xFF))
 523                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 524                 write_byte(f, xflags);
 525         }
 526         if (xflags & XMIT_SAME_NAME)
 527                 write_byte(f, l1);
 528         if (xflags & XMIT_LONG_NAME)
 529                 write_varint30(f, l2);
 530         else
 531                 write_byte(f, l2);
 532         write_buf(f, fname + l1, l2);
 533
 534 #ifdef SUPPORT_HARD_LINKS
 535         if (first_hlink_ndx >= 0) {
 536                 write_varint(f, first_hlink_ndx);
 537                 if (first_hlink_ndx >= first_ndx)
 538                         goto the_end;
 539         }
 540 #endif
 541
 542         write_varlong30(f, F_LENGTH(file), 3);
 543         if (!(xflags & XMIT_SAME_TIME)) {
 544                 if (protocol_version >= 30)
 545                         write_varlong(f, modtime, 4);
 546                 else
 547                         write_int(f, modtime);
 548         }
 549         if (!(xflags & XMIT_SAME_MODE))
 550                 write_int(f, to_wire_mode(mode));
 551         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 552                 if (protocol_version < 30)
 553                         write_int(f, uid);
 554                 else {
 555                         write_varint(f, uid);
 556                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 557                                 int len = strlen(user_name);
 558                                 write_byte(f, len);
 559                                 write_buf(f, user_name, len);
 560                         }
 561                 }
 562         }
 563         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 564                 if (protocol_version < 30)
 565                         write_int(f, gid);
 566                 else {
 567                         write_varint(f, gid);
 568                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 569                                 int len = strlen(group_name);
 570                                 write_byte(f, len);
 571                                 write_buf(f, group_name, len);
 572                         }
 573                 }
 574         }
 575         if ((preserve_devices && IS_DEVICE(mode))
 576          || (preserve_specials && IS_SPECIAL(mode))) {
 577                 if (protocol_version < 28) {
 578                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 579                                 write_int(f, (int)rdev);
 580                 } else {
 581                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 582                                 write_varint30(f, major(rdev));
 583                         if (protocol_version >= 30)
 584                                 write_varint(f, minor(rdev));
 585                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 586                                 write_byte(f, minor(rdev));
 587                         else
 588                                 write_int(f, minor(rdev));
 589                 }
 590         }
 591
 592 #ifdef SUPPORT_LINKS
 593         if (preserve_links && S_ISLNK(mode)) {
 594                 const char *sl = F_SYMLINK(file);
 595                 int len = strlen(sl);
 596                 write_varint30(f, len);
 597                 write_buf(f, sl, len);
 598         }
 599 #endif
 600
 601 #ifdef SUPPORT_HARD_LINKS
 602         if (tmp_dev != 0 && protocol_version < 30) {
 603                 if (protocol_version < 26) {
 604                         /* 32-bit dev_t and ino_t */
 605                         write_int(f, (int32)dev);
 606                         write_int(f, (int32)tmp_ino);
 607                 } else {
 608                         /* 64-bit dev_t and ino_t */
 609                         if (!(xflags & XMIT_SAME_DEV_pre30))
 610                                 write_longint(f, dev);
 611                         write_longint(f, tmp_ino);
 612                 }
 613         }
 614 #endif
 615
 616         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 617                 const char *sum;
 618                 if (S_ISREG(mode))
 619                         sum = tmp_sum;
 620                 else {
 621                         /* Prior to 28, we sent a useless set of nulls. */
 622                         sum = empty_sum;
 623                 }
 624                 write_buf(f, sum, checksum_len);
 625         }
 626
 627 #ifdef SUPPORT_HARD_LINKS
 628   the_end:
 629 #endif
 630         strlcpy(lastname, fname, MAXPATHLEN);
 631
 632         if (S_ISREG(mode) || S_ISLNK(mode))
 633                 stats.total_size += F_LENGTH(file);
 634 }
 635
 636 static struct file_struct *recv_file_entry(struct file_list *flist,
 637                                            int xflags, int f)
 638 {
 639         static int64 modtime;
 640         static mode_t mode;
 641 #ifdef SUPPORT_HARD_LINKS
 642         static int64 dev;
 643 #endif
 644         static dev_t rdev;
 645         static uint32 rdev_major;
 646         static uid_t uid;
 647         static gid_t gid;
 648         static uint16 gid_flags;
 649         static char lastname[MAXPATHLEN], *lastdir;
 650         static int lastdir_depth, lastdir_len = -1;
 651         static unsigned int del_hier_name_len = 0;
 652         static int in_del_hier = 0;
 653         char thisname[MAXPATHLEN];
 654         unsigned int l1 = 0, l2 = 0;
 655         int alloc_len, basename_len, linkname_len;
 656         int extra_len = file_extra_cnt * EXTRA_LEN;
 657         int first_hlink_ndx = -1;
 658         int64 file_length;
 659         const char *basename;
 660         struct file_struct *file;
 661         alloc_pool_t *pool;
 662         char *bp;
 663
 664         if (xflags & XMIT_SAME_NAME)
 665                 l1 = read_byte(f);
 666
 667         if (xflags & XMIT_LONG_NAME)
 668                 l2 = read_varint30(f);
 669         else
 670                 l2 = read_byte(f);
 671
 672         if (l2 >= MAXPATHLEN - l1) {
 673                 rprintf(FERROR,
 674                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 675                         xflags, l1, l2, lastname, who_am_i());
 676                 overflow_exit("recv_file_entry");
 677         }
 678
 679         strlcpy(thisname, lastname, l1 + 1);
 680         read_sbuf(f, &thisname[l1], l2);
 681         thisname[l1 + l2] = 0;
 682
 683         /* Abuse basename_len for a moment... */
 684         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 685
 686 #ifdef ICONV_OPTION
 687         if (ic_recv != (iconv_t)-1) {
 688                 xbuf outbuf, inbuf;
 689
 690                 INIT_CONST_XBUF(outbuf, thisname);
 691                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 692
 693                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 694                         io_error |= IOERR_GENERAL;
 695                         rprintf(FINFO,
 696                             "[%s] cannot convert filename: %s (%s)\n",
 697                             who_am_i(), lastname, strerror(errno));
 698                         outbuf.len = 0;
 699                 }
 700                 outbuf.buf[outbuf.len] = '\0';
 701         }
 702 #endif
 703
 704         if (*thisname)
 705                 clean_fname(thisname, 0);
 706
 707         if (sanitize_paths)
 708                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 709
 710         if ((basename = strrchr(thisname, '/')) != NULL) {
 711                 int len = basename++ - thisname;
 712                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 713                         lastdir = new_array(char, len + 1);
 714                         memcpy(lastdir, thisname, len);
 715                         lastdir[len] = '\0';
 716                         lastdir_len = len;
 717                         lastdir_depth = count_dir_elements(lastdir);
 718                 }
 719         } else
 720                 basename = thisname;
 721         basename_len = strlen(basename) + 1; /* count the '\0' */
 722
 723 #ifdef SUPPORT_HARD_LINKS
 724         if (protocol_version >= 30
 725          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 726                 first_hlink_ndx = read_varint(f);
 727                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 728                         rprintf(FERROR,
 729                                 "hard-link reference out of range: %d (%d)\n",
 730                                 first_hlink_ndx, flist->ndx_start + flist->used);
 731                         exit_cleanup(RERR_PROTOCOL);
 732                 }
 733                 if (DEBUG_GTE(HLINK, 1)) {
 734                         rprintf(FINFO, "[%s] #%d hard-links #%d (%sabbrev)\n",
 735                                 who_am_i(), flist->used+flist->ndx_start, first_hlink_ndx,
 736                                 first_hlink_ndx >= flist->ndx_start ? "" : "un");
 737                 }
 738                 if (first_hlink_ndx >= flist->ndx_start) {
 739                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 740                         file_length = F_LENGTH(first);
 741                         modtime = first->modtime;
 742                         mode = first->mode;
 743                         if (preserve_uid)
 744                                 uid = F_OWNER(first);
 745                         if (preserve_gid)
 746                                 gid = F_GROUP(first);
 747                         if ((preserve_devices && IS_DEVICE(mode))
 748                          || (preserve_specials && IS_SPECIAL(mode))) {
 749                                 uint32 *devp = F_RDEV_P(first);
 750                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 751                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 752                         }
 753                         if (preserve_links && S_ISLNK(mode))
 754                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 755                         else
 756                                 linkname_len = 0;
 757                         goto create_object;
 758                 }
 759         }
 760 #endif
 761
 762         file_length = read_varlong30(f, 3);
 763         if (!(xflags & XMIT_SAME_TIME)) {
 764                 if (protocol_version >= 30) {
 765                         modtime = read_varlong(f, 4);
 766 #if SIZEOF_TIME_T < SIZEOF_INT64
 767                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 768                                 rprintf(FERROR_XFER,
 769                                     "Time value of %s truncated on receiver.\n",
 770                                     lastname);
 771                         }
 772 #endif
 773                 } else
 774                         modtime = read_int(f);
 775         }
 776         if (!(xflags & XMIT_SAME_MODE))
 777                 mode = from_wire_mode(read_int(f));
 778
 779         if (chmod_modes && !S_ISLNK(mode))
 780                 mode = tweak_mode(mode, chmod_modes);
 781
 782         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 783                 if (protocol_version < 30)
 784                         uid = (uid_t)read_int(f);
 785                 else {
 786                         uid = (uid_t)read_varint(f);
 787                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 788                                 uid = recv_user_name(f, uid);
 789                         else if (inc_recurse && am_root && !numeric_ids)
 790                                 uid = match_uid(uid);
 791                 }
 792         }
 793         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 794                 if (protocol_version < 30)
 795                         gid = (gid_t)read_int(f);
 796                 else {
 797                         gid = (gid_t)read_varint(f);
 798                         gid_flags = 0;
 799                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 800                                 gid = recv_group_name(f, gid, &gid_flags);
 801                         else if (inc_recurse && (!am_root || !numeric_ids))
 802                                 gid = match_gid(gid, &gid_flags);
 803                 }
 804         }
 805
 806         if ((preserve_devices && IS_DEVICE(mode))
 807          || (preserve_specials && IS_SPECIAL(mode))) {
 808                 if (protocol_version < 28) {
 809                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 810                                 rdev = (dev_t)read_int(f);
 811                 } else {
 812                         uint32 rdev_minor;
 813                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 814                                 rdev_major = read_varint30(f);
 815                         if (protocol_version >= 30)
 816                                 rdev_minor = read_varint(f);
 817                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 818                                 rdev_minor = read_byte(f);
 819                         else
 820                                 rdev_minor = read_int(f);
 821                         rdev = MAKEDEV(rdev_major, rdev_minor);
 822                 }
 823                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 824                 file_length = 0;
 825         } else if (protocol_version < 28)
 826                 rdev = MAKEDEV(0, 0);
 827
 828 #ifdef SUPPORT_LINKS
 829         if (preserve_links && S_ISLNK(mode)) {
 830                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 831                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 832                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 833                                 linkname_len - 1);
 834                         overflow_exit("recv_file_entry");
 835                 }
 836                 if (munge_symlinks)
 837                         linkname_len += SYMLINK_PREFIX_LEN;
 838         }
 839         else
 840 #endif
 841                 linkname_len = 0;
 842
 843 #ifdef SUPPORT_HARD_LINKS
 844   create_object:
 845         if (preserve_hard_links) {
 846                 if (protocol_version < 28 && S_ISREG(mode))
 847                         xflags |= XMIT_HLINKED;
 848                 if (xflags & XMIT_HLINKED)
 849                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 850         }
 851 #endif
 852
 853 #ifdef SUPPORT_ACLS
 854         /* Directories need an extra int32 for the default ACL. */
 855         if (preserve_acls && S_ISDIR(mode))
 856                 extra_len += EXTRA_LEN;
 857 #endif
 858
 859         if (always_checksum && S_ISREG(mode))
 860                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 861
 862 #if SIZEOF_INT64 >= 8
 863         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 864                 extra_len += EXTRA_LEN;
 865 #endif
 866         if (file_length < 0) {
 867                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 868                 exit_cleanup(RERR_UNSUPPORTED);
 869         }
 870
 871         if (inc_recurse && S_ISDIR(mode)) {
 872                 if (one_file_system) {
 873                         /* Room to save the dir's device for -x */
 874                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 875                 }
 876                 pool = dir_flist->file_pool;
 877         } else
 878                 pool = flist->file_pool;
 879
 880 #if EXTRA_ROUNDING > 0
 881         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 882                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 883 #endif
 884
 885         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 886                   + linkname_len;
 887         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 888
 889         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 890         bp += extra_len;
 891         file = (struct file_struct *)bp;
 892         bp += FILE_STRUCT_LEN;
 893
 894         memcpy(bp, basename, basename_len);
 895
 896 #ifdef SUPPORT_HARD_LINKS
 897         if (xflags & XMIT_HLINKED)
 898                 file->flags |= FLAG_HLINKED;
 899 #endif
 900         file->modtime = (time_t)modtime;
 901         file->len32 = (uint32)file_length;
 902 #if SIZEOF_INT64 >= 8
 903         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 904 #if SIZEOF_CAPITAL_OFF_T < 8
 905                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 906                 exit_cleanup(RERR_UNSUPPORTED);
 907 #else
 908                 file->flags |= FLAG_LENGTH64;
 909                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 910 #endif
 911         }
 912 #endif
 913         file->mode = mode;
 914         if (preserve_uid)
 915                 F_OWNER(file) = uid;
 916         if (preserve_gid) {
 917                 F_GROUP(file) = gid;
 918                 file->flags |= gid_flags;
 919         }
 920         if (unsort_ndx)
 921                 F_NDX(file) = flist->used + flist->ndx_start;
 922
 923         if (basename != thisname) {
 924                 file->dirname = lastdir;
 925                 F_DEPTH(file) = lastdir_depth + 1;
 926         } else
 927                 F_DEPTH(file) = 1;
 928
 929         if (S_ISDIR(mode)) {
 930                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 931                         F_DEPTH(file)--;
 932                 if (protocol_version >= 30) {
 933                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 934                                 if (xflags & XMIT_TOP_DIR)
 935                                         file->flags |= FLAG_TOP_DIR;
 936                                 file->flags |= FLAG_CONTENT_DIR;
 937                         } else if (xflags & XMIT_TOP_DIR)
 938                                 file->flags |= FLAG_IMPLIED_DIR;
 939                 } else if (xflags & XMIT_TOP_DIR) {
 940                         in_del_hier = recurse;
 941                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 942                         if (relative_paths && del_hier_name_len > 2
 943                             && lastname[del_hier_name_len-1] == '.'
 944                             && lastname[del_hier_name_len-2] == '/')
 945                                 del_hier_name_len -= 2;
 946                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 947                 } else if (in_del_hier) {
 948                         if (!relative_paths || !del_hier_name_len
 949                          || (l1 >= del_hier_name_len
 950                           && lastname[del_hier_name_len] == '/'))
 951                                 file->flags |= FLAG_CONTENT_DIR;
 952                         else
 953                                 in_del_hier = 0;
 954                 }
 955         }
 956
 957         if ((preserve_devices && IS_DEVICE(mode))
 958          || (preserve_specials && IS_SPECIAL(mode))) {
 959                 uint32 *devp = F_RDEV_P(file);
 960                 DEV_MAJOR(devp) = major(rdev);
 961                 DEV_MINOR(devp) = minor(rdev);
 962         }
 963
 964 #ifdef SUPPORT_LINKS
 965         if (linkname_len) {
 966                 bp += basename_len;
 967                 if (first_hlink_ndx >= flist->ndx_start) {
 968                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 969                         memcpy(bp, F_SYMLINK(first), linkname_len);
 970                 } else if (munge_symlinks) {
 971                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 972                         bp += SYMLINK_PREFIX_LEN;
 973                         linkname_len -= SYMLINK_PREFIX_LEN;
 974                         read_sbuf(f, bp, linkname_len - 1);
 975                 } else {
 976                         read_sbuf(f, bp, linkname_len - 1);
 977                         if (sanitize_paths)
 978                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
 979                 }
 980         }
 981 #endif
 982
 983 #ifdef SUPPORT_HARD_LINKS
 984         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 985                 if (protocol_version >= 30) {
 986                         if (xflags & XMIT_HLINK_FIRST) {
 987                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
 988                         } else
 989                                 F_HL_GNUM(file) = first_hlink_ndx;
 990                 } else {
 991                         static int32 cnt = 0;
 992                         struct ht_int64_node *np;
 993                         int64 ino;
 994                         int32 ndx;
 995                         if (protocol_version < 26) {
 996                                 dev = read_int(f);
 997                                 ino = read_int(f);
 998                         } else {
 999                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1000                                         dev = read_longint(f);
1001                                 ino = read_longint(f);
1002                         }
1003                         np = idev_find(dev, ino);
1004                         ndx = (int32)(long)np->data - 1;
1005                         if (ndx < 0) {
1006                                 ndx = cnt++;
1007                                 np->data = (void*)(long)cnt;
1008                         }
1009                         F_HL_GNUM(file) = ndx;
1010                 }
1011         }
1012 #endif
1013
1014         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1015                 if (S_ISREG(mode))
1016                         bp = F_SUM(file);
1017                 else {
1018                         /* Prior to 28, we get a useless set of nulls. */
1019                         bp = tmp_sum;
1020                 }
1021                 if (first_hlink_ndx >= flist->ndx_start) {
1022                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1023                         memcpy(bp, F_SUM(first), checksum_len);
1024                 } else
1025                         read_buf(f, bp, checksum_len);
1026         }
1027
1028 #ifdef SUPPORT_ACLS
1029         if (preserve_acls && !S_ISLNK(mode))
1030                 receive_acl(file, f);
1031 #endif
1032 #ifdef SUPPORT_XATTRS
1033         if (preserve_xattrs)
1034                 receive_xattr(file, f );
1035 #endif
1036
1037         if (S_ISREG(mode) || S_ISLNK(mode))
1038                 stats.total_size += file_length;
1039
1040         return file;
1041 }
1042
1043 /* Create a file_struct for a named file by reading its stat() information
1044  * and performing extensive checks against global options.
1045  *
1046  * Returns a pointer to the new file struct, or NULL if there was an error
1047  * or this file should be excluded.
1048  *
1049  * Note: Any error (here or in send_file_name) that results in the omission of
1050  * an existent source file from the file list should set
1051  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1052  * destination if --delete is on. */
1053 struct file_struct *make_file(const char *fname, struct file_list *flist,
1054                               STRUCT_STAT *stp, int flags, int filter_level)
1055 {
1056         static char *lastdir;
1057         static int lastdir_len = -1;
1058         struct file_struct *file;
1059         char thisname[MAXPATHLEN];
1060         char linkname[MAXPATHLEN];
1061         int alloc_len, basename_len, linkname_len;
1062         int extra_len = file_extra_cnt * EXTRA_LEN;
1063         const char *basename;
1064         alloc_pool_t *pool;
1065         STRUCT_STAT st;
1066         char *bp;
1067
1068         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1069                 io_error |= IOERR_GENERAL;
1070                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1071                 return NULL;
1072         }
1073         clean_fname(thisname, 0);
1074         if (sanitize_paths)
1075                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1076
1077         if (stp && S_ISDIR(stp->st_mode)) {
1078                 st = *stp; /* Needed for "symlink/." with --relative. */
1079                 *linkname = '\0'; /* make IBM code checker happy */
1080         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1081                 int save_errno = errno;
1082                 /* See if file is excluded before reporting an error. */
1083                 if (filter_level != NO_FILTERS
1084                  && (is_excluded(thisname, 0, filter_level)
1085                   || is_excluded(thisname, 1, filter_level))) {
1086                         if (ignore_perishable && save_errno != ENOENT)
1087                                 non_perishable_cnt++;
1088                         return NULL;
1089                 }
1090                 if (save_errno == ENOENT) {
1091 #ifdef SUPPORT_LINKS
1092                         /* When our options tell us to follow a symlink that
1093                          * points nowhere, tell the user about the symlink
1094                          * instead of giving a "vanished" message.  We only
1095                          * dereference a symlink if one of the --copy*links
1096                          * options was specified, so there's no need for the
1097                          * extra lstat() if one of these options isn't on. */
1098                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1099                          && x_lstat(thisname, &st, NULL) == 0
1100                          && S_ISLNK(st.st_mode)) {
1101                                 io_error |= IOERR_GENERAL;
1102                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1103                                         full_fname(thisname));
1104                         } else
1105 #endif
1106                         {
1107                                 enum logcode c = am_daemon && protocol_version < 28
1108                                                ? FERROR : FWARNING;
1109                                 io_error |= IOERR_VANISHED;
1110                                 rprintf(c, "file has vanished: %s\n",
1111                                         full_fname(thisname));
1112                         }
1113                 } else {
1114                         io_error |= IOERR_GENERAL;
1115                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1116                                 full_fname(thisname));
1117                 }
1118                 return NULL;
1119         }
1120
1121         if (filter_level == NO_FILTERS)
1122                 goto skip_filters;
1123
1124         if (S_ISDIR(st.st_mode)) {
1125                 if (!xfer_dirs) {
1126                         rprintf(FINFO, "skipping directory %s\n", thisname);
1127                         return NULL;
1128                 }
1129                 /* -x only affects dirs because we need to avoid recursing
1130                  * into a mount-point directory, not to avoid copying a
1131                  * symlinked file if -L (or similar) was specified. */
1132                 if (one_file_system && st.st_dev != filesystem_dev
1133                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1134                         if (one_file_system > 1) {
1135                                 if (INFO_GTE(MOUNT, 1)) {
1136                                         rprintf(FINFO,
1137                                             "[%s] skipping mount-point dir %s\n",
1138                                             who_am_i(), thisname);
1139                                 }
1140                                 return NULL;
1141                         }
1142                         flags |= FLAG_MOUNT_DIR;
1143                         flags &= ~FLAG_CONTENT_DIR;
1144                 }
1145         } else
1146                 flags &= ~FLAG_CONTENT_DIR;
1147
1148         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1149                 if (ignore_perishable)
1150                         non_perishable_cnt++;
1151                 return NULL;
1152         }
1153
1154         if (lp_ignore_nonreadable(module_id)) {
1155 #ifdef SUPPORT_LINKS
1156                 if (!S_ISLNK(st.st_mode))
1157 #endif
1158                         if (access(thisname, R_OK) != 0)
1159                                 return NULL;
1160         }
1161
1162   skip_filters:
1163
1164         /* Only divert a directory in the main transfer. */
1165         if (flist) {
1166                 if (flist->prev && S_ISDIR(st.st_mode)
1167                  && flags & FLAG_DIVERT_DIRS) {
1168                         /* Room for parent/sibling/next-child info. */
1169                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1170                         if (relative_paths)
1171                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1172                         pool = dir_flist->file_pool;
1173                 } else
1174                         pool = flist->file_pool;
1175         } else {
1176 #ifdef SUPPORT_ACLS
1177                 /* Directories need an extra int32 for the default ACL. */
1178                 if (preserve_acls && S_ISDIR(st.st_mode))
1179                         extra_len += EXTRA_LEN;
1180 #endif
1181                 pool = NULL;
1182         }
1183
1184         if (DEBUG_GTE(FLIST, 2)) {
1185                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1186                         who_am_i(), thisname, filter_level);
1187         }
1188
1189         if ((basename = strrchr(thisname, '/')) != NULL) {
1190                 int len = basename++ - thisname;
1191                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1192                         lastdir = new_array(char, len + 1);
1193                         memcpy(lastdir, thisname, len);
1194                         lastdir[len] = '\0';
1195                         lastdir_len = len;
1196                 }
1197         } else
1198                 basename = thisname;
1199         basename_len = strlen(basename) + 1; /* count the '\0' */
1200
1201 #ifdef SUPPORT_LINKS
1202         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1203 #else
1204         linkname_len = 0;
1205 #endif
1206
1207 #if SIZEOF_CAPITAL_OFF_T >= 8
1208         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1209                 extra_len += EXTRA_LEN;
1210 #endif
1211
1212 #if EXTRA_ROUNDING > 0
1213         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1214                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1215 #endif
1216
1217         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1218                   + linkname_len;
1219         if (pool)
1220                 bp = pool_alloc(pool, alloc_len, "make_file");
1221         else {
1222                 if (!(bp = new_array(char, alloc_len)))
1223                         out_of_memory("make_file");
1224         }
1225
1226         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1227         bp += extra_len;
1228         file = (struct file_struct *)bp;
1229         bp += FILE_STRUCT_LEN;
1230
1231         memcpy(bp, basename, basename_len);
1232
1233 #ifdef SUPPORT_HARD_LINKS
1234         if (preserve_hard_links && flist && flist->prev) {
1235                 if (protocol_version >= 28
1236                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1237                  : S_ISREG(st.st_mode)) {
1238                         tmp_dev = st.st_dev;
1239                         tmp_ino = st.st_ino;
1240                 } else
1241                         tmp_dev = 0;
1242         }
1243 #endif
1244
1245 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1246         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1247                 tmp_rdev = st.st_rdev;
1248                 st.st_size = 0;
1249         }
1250 #endif
1251
1252         file->flags = flags;
1253         file->modtime = st.st_mtime;
1254         file->len32 = (uint32)st.st_size;
1255 #if SIZEOF_CAPITAL_OFF_T >= 8
1256         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1257                 file->flags |= FLAG_LENGTH64;
1258                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1259         }
1260 #endif
1261         file->mode = st.st_mode;
1262         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1263                 F_OWNER(file) = st.st_uid;
1264         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1265                 F_GROUP(file) = st.st_gid;
1266
1267         if (basename != thisname)
1268                 file->dirname = lastdir;
1269
1270 #ifdef SUPPORT_LINKS
1271         if (linkname_len)
1272                 memcpy(bp + basename_len, linkname, linkname_len);
1273 #endif
1274
1275         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1276                 file_checksum(thisname, tmp_sum, st.st_size);
1277
1278         if (am_sender)
1279                 F_PATHNAME(file) = pathname;
1280         else if (!pool)
1281                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1282
1283         /* This code is only used by the receiver when it is building
1284          * a list of files for a delete pass. */
1285         if (keep_dirlinks && linkname_len && flist) {
1286                 STRUCT_STAT st2;
1287                 int save_mode = file->mode;
1288                 file->mode = S_IFDIR; /* Find a directory with our name. */
1289                 if (flist_find(dir_flist, file) >= 0
1290                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1291                         file->modtime = st2.st_mtime;
1292                         file->len32 = 0;
1293                         file->mode = st2.st_mode;
1294                         if (uid_ndx)
1295                                 F_OWNER(file) = st2.st_uid;
1296                         if (gid_ndx)
1297                                 F_GROUP(file) = st2.st_gid;
1298                 } else
1299                         file->mode = save_mode;
1300         }
1301
1302         if (basename_len == 0+1) {
1303                 if (!pool)
1304                         unmake_file(file);
1305                 return NULL;
1306         }
1307
1308         if (unsort_ndx)
1309                 F_NDX(file) = dir_count;
1310
1311         return file;
1312 }
1313
1314 /* Only called for temporary file_struct entries created by make_file(). */
1315 void unmake_file(struct file_struct *file)
1316 {
1317         free(REQ_EXTRA(file, F_DEPTH(file)));
1318 }
1319
1320 static struct file_struct *send_file_name(int f, struct file_list *flist,
1321                                           const char *fname, STRUCT_STAT *stp,
1322                                           int flags, int filter_level)
1323 {
1324         struct file_struct *file;
1325
1326         file = make_file(fname, flist, stp, flags, filter_level);
1327         if (!file)
1328                 return NULL;
1329
1330         if (chmod_modes && !S_ISLNK(file->mode))
1331                 file->mode = tweak_mode(file->mode, chmod_modes);
1332
1333         if (f >= 0) {
1334                 char fbuf[MAXPATHLEN];
1335 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1336                 stat_x sx;
1337 #endif
1338
1339 #ifdef ICONV_OPTION
1340                 if (ic_send != (iconv_t)-1) {
1341                         xbuf outbuf, inbuf;
1342
1343                         INIT_CONST_XBUF(outbuf, fbuf);
1344
1345                         if (file->dirname) {
1346                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1347                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1348                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1349                                         goto convert_error;
1350                                 outbuf.size += 2;
1351                                 outbuf.buf[outbuf.len++] = '/';
1352                         }
1353
1354                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1355                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1356                           convert_error:
1357                                 io_error |= IOERR_GENERAL;
1358                                 rprintf(FINFO,
1359                                     "[%s] cannot convert filename: %s (%s)\n",
1360                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1361                                 return NULL;
1362                         }
1363                         outbuf.buf[outbuf.len] = '\0';
1364                 } else
1365 #endif
1366                         f_name(file, fbuf);
1367
1368 #ifdef SUPPORT_ACLS
1369                 if (preserve_acls && !S_ISLNK(file->mode)) {
1370                         sx.st.st_mode = file->mode;
1371                         sx.acc_acl = sx.def_acl = NULL;
1372                         if (get_acl(fname, &sx) < 0) {
1373                                 io_error |= IOERR_GENERAL;
1374                                 return NULL;
1375                         }
1376                 }
1377 #endif
1378 #ifdef SUPPORT_XATTRS
1379                 if (preserve_xattrs) {
1380                         sx.xattr = NULL;
1381                         if (get_xattr(fname, &sx) < 0) {
1382                                 io_error |= IOERR_GENERAL;
1383                                 return NULL;
1384                         }
1385                 }
1386 #endif
1387
1388                 send_file_entry(f, fbuf, file, flist->used, flist->ndx_start);
1389
1390 #ifdef SUPPORT_ACLS
1391                 if (preserve_acls && !S_ISLNK(file->mode)) {
1392                         send_acl(&sx, f);
1393                         free_acl(&sx);
1394                 }
1395 #endif
1396 #ifdef SUPPORT_XATTRS
1397                 if (preserve_xattrs) {
1398                         F_XATTR(file) = send_xattr(&sx, f);
1399                         free_xattr(&sx);
1400                 }
1401 #endif
1402         }
1403
1404         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1405
1406         flist_expand(flist, 1);
1407         flist->files[flist->used++] = file;
1408
1409         return file;
1410 }
1411
1412 static void send_if_directory(int f, struct file_list *flist,
1413                               struct file_struct *file,
1414                               char *fbuf, unsigned int ol,
1415                               int flags)
1416 {
1417         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1418
1419         if (S_ISDIR(file->mode)
1420             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1421                 void *save_filters;
1422                 unsigned int len = strlen(fbuf);
1423                 if (len > 1 && fbuf[len-1] == '/')
1424                         fbuf[--len] = '\0';
1425                 if (len >= MAXPATHLEN - 1) {
1426                         io_error |= IOERR_GENERAL;
1427                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1428                                 full_fname(fbuf));
1429                         return;
1430                 }
1431                 save_filters = push_local_filters(fbuf, len);
1432                 send_directory(f, flist, fbuf, len, flags);
1433                 pop_local_filters(save_filters);
1434                 fbuf[ol] = '\0';
1435                 if (is_dot_dir)
1436                         fbuf[ol-1] = '.';
1437         }
1438 }
1439
1440 static int file_compare(const void *file1, const void *file2)
1441 {
1442         return f_name_cmp(*(struct file_struct **)file1,
1443                           *(struct file_struct **)file2);
1444 }
1445
1446 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1447  * version, but I (Wayne) changed the merge code to do less copying and
1448  * to require only half the amount of temporary memory. */
1449 static void fsort_tmp(struct file_struct **fp, size_t num,
1450                       struct file_struct **tmp)
1451 {
1452         struct file_struct **f1, **f2, **t;
1453         size_t n1, n2;
1454
1455         n1 = num / 2;
1456         n2 = num - n1;
1457         f1 = fp;
1458         f2 = fp + n1;
1459
1460         if (n1 > 1)
1461                 fsort_tmp(f1, n1, tmp);
1462         if (n2 > 1)
1463                 fsort_tmp(f2, n2, tmp);
1464
1465         while (f_name_cmp(*f1, *f2) <= 0) {
1466                 if (!--n1)
1467                         return;
1468                 f1++;
1469         }
1470
1471         t = tmp;
1472         memcpy(t, f1, n1 * PTR_SIZE);
1473
1474         *f1++ = *f2++, n2--;
1475
1476         while (n1 > 0 && n2 > 0) {
1477                 if (f_name_cmp(*t, *f2) <= 0)
1478                         *f1++ = *t++, n1--;
1479                 else
1480                         *f1++ = *f2++, n2--;
1481         }
1482
1483         if (n1 > 0)
1484                 memcpy(f1, t, n1 * PTR_SIZE);
1485 }
1486
1487 /* This file-struct sorting routine makes sure that any identical names in
1488  * the file list stay in the same order as they were in the original list.
1489  * This is particularly vital in inc_recurse mode where we expect a sort
1490  * on the flist to match the exact order of a sort on the dir_flist. */
1491 static void fsort(struct file_struct **fp, size_t num)
1492 {
1493         if (num <= 1)
1494                 return;
1495
1496         if (use_qsort)
1497                 qsort(fp, num, PTR_SIZE, file_compare);
1498         else {
1499                 struct file_struct **tmp = new_array(struct file_struct *,
1500                                                      (num+1) / 2);
1501                 fsort_tmp(fp, num, tmp);
1502                 free(tmp);
1503         }
1504 }
1505
1506 /* We take an entire set of sibling dirs from the sorted flist and link them
1507  * into the tree, setting the appropriate parent/child/sibling pointers. */
1508 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1509                              int dir_cnt)
1510 {
1511         int i;
1512         int32 *dp = NULL;
1513         int32 *parent_dp = parent_ndx < 0 ? NULL
1514                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1515
1516         flist_expand(dir_flist, dir_cnt);
1517         dir_flist->sorted = dir_flist->files;
1518
1519         for (i = 0; dir_cnt; i++) {
1520                 struct file_struct *file = from_flist->sorted[i];
1521
1522                 if (!S_ISDIR(file->mode))
1523                         continue;
1524
1525                 dir_flist->files[dir_flist->used++] = file;
1526                 dir_cnt--;
1527
1528                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1529                         continue;
1530
1531                 if (dp)
1532                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1533                 else if (parent_dp)
1534                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1535                 else
1536                         send_dir_ndx = dir_flist->used - 1;
1537
1538                 dp = F_DIR_NODE_P(file);
1539                 DIR_PARENT(dp) = parent_ndx;
1540                 DIR_FIRST_CHILD(dp) = -1;
1541         }
1542         if (dp)
1543                 DIR_NEXT_SIBLING(dp) = -1;
1544 }
1545
1546 /* This function is normally called by the sender, but the receiving side also
1547  * calls it from get_dirlist() with f set to -1 so that we just construct the
1548  * file list in memory without sending it over the wire.  Also, get_dirlist()
1549  * might call this with f set to -2, which also indicates that local filter
1550  * rules should be ignored. */
1551 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1552                            int flags)
1553 {
1554         struct dirent *di;
1555         unsigned remainder;
1556         char *p;
1557         DIR *d;
1558         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1559         int start = flist->used;
1560         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1561
1562         assert(flist != NULL);
1563
1564         if (!(d = opendir(fbuf))) {
1565                 io_error |= IOERR_GENERAL;
1566                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1567                 return;
1568         }
1569
1570         p = fbuf + len;
1571         if (len != 1 || *fbuf != '/')
1572                 *p++ = '/';
1573         *p = '\0';
1574         remainder = MAXPATHLEN - (p - fbuf);
1575
1576         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1577                 char *dname = d_name(di);
1578                 if (dname[0] == '.' && (dname[1] == '\0'
1579                     || (dname[1] == '.' && dname[2] == '\0')))
1580                         continue;
1581                 if (strlcpy(p, dname, remainder) >= remainder) {
1582                         io_error |= IOERR_GENERAL;
1583                         rprintf(FINFO,
1584                                 "cannot send long-named file %s\n",
1585                                 full_fname(fbuf));
1586                         continue;
1587                 }
1588                 if (dname[0] == '\0') {
1589                         io_error |= IOERR_GENERAL;
1590                         rprintf(FINFO,
1591                                 "cannot send file with empty name in %s\n",
1592                                 full_fname(fbuf));
1593                         continue;
1594                 }
1595
1596                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1597         }
1598
1599         fbuf[len] = '\0';
1600
1601         if (errno) {
1602                 io_error |= IOERR_GENERAL;
1603                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1604         }
1605
1606         closedir(d);
1607
1608         if (f >= 0 && recurse && !divert_dirs) {
1609                 int i, end = flist->used - 1;
1610                 /* send_if_directory() bumps flist->used, so use "end". */
1611                 for (i = start; i <= end; i++)
1612                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1613         }
1614 }
1615
1616 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1617                               char *start, char *limit, int flags, char name_type)
1618 {
1619         static char lastpath[MAXPATHLEN] = "";
1620         static int lastpath_len = 0;
1621         static struct file_struct *lastpath_struct = NULL;
1622         struct file_struct *file;
1623         item_list *relname_list;
1624         relnamecache **rnpp;
1625         int len, need_new_dir, depth = 0;
1626         struct filter_list_struct save_filter_list = filter_list;
1627
1628         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1629         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1630
1631         if (inc_recurse) {
1632                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1633                  && lastpath_len == limit - fname
1634                  && strncmp(lastpath, fname, lastpath_len) == 0)
1635                         need_new_dir = 0;
1636                 else
1637                         need_new_dir = 1;
1638         } else {
1639                 char *tp = fname, *lp = lastpath;
1640                 /* Skip any initial directories in our path that we
1641                  * have in common with lastpath. */
1642                 assert(start == fname);
1643                 for ( ; ; tp++, lp++) {
1644                         if (tp == limit) {
1645                                 if (*lp == '/' || *lp == '\0')
1646                                         goto done;
1647                                 break;
1648                         }
1649                         if (*lp != *tp)
1650                                 break;
1651                         if (*tp == '/') {
1652                                 start = tp;
1653                                 depth++;
1654                         }
1655                 }
1656                 need_new_dir = 1;
1657         }
1658
1659         if (need_new_dir) {
1660                 int save_copy_links = copy_links;
1661                 int save_xfer_dirs = xfer_dirs;
1662                 char *slash;
1663
1664                 copy_links = xfer_dirs = 1;
1665
1666                 *limit = '\0';
1667
1668                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1669                         *slash = '\0';
1670                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1671                         depth++;
1672                         if (!inc_recurse && file && S_ISDIR(file->mode))
1673                                 change_local_filter_dir(fname, strlen(fname), depth);
1674                         *slash = '/';
1675                 }
1676
1677                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1678                 if (inc_recurse) {
1679                         if (file && !S_ISDIR(file->mode))
1680                                 file = NULL;
1681                         lastpath_struct = file;
1682                 } else if (file && S_ISDIR(file->mode))
1683                         change_local_filter_dir(fname, strlen(fname), ++depth);
1684
1685                 strlcpy(lastpath, fname, sizeof lastpath);
1686                 lastpath_len = limit - fname;
1687
1688                 *limit = '/';
1689
1690                 copy_links = save_copy_links;
1691                 xfer_dirs = save_xfer_dirs;
1692
1693                 if (!inc_recurse)
1694                         goto done;
1695         }
1696
1697         if (!lastpath_struct)
1698                 goto done; /* dir must have vanished */
1699
1700         len = strlen(limit+1);
1701         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1702         if (!relname_list) {
1703                 if (!(relname_list = new0(item_list)))
1704                         out_of_memory("send_implied_dirs");
1705                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1706         }
1707         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1708         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1709                 out_of_memory("send_implied_dirs");
1710         (*rnpp)->name_type = name_type;
1711         strlcpy((*rnpp)->fname, limit+1, len + 1);
1712
1713 done:
1714         filter_list = save_filter_list;
1715 }
1716
1717 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1718 {
1719         char fbuf[MAXPATHLEN];
1720         item_list *relname_list;
1721         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1722         size_t j;
1723
1724         f_name(file, fbuf);
1725         dlen = strlen(fbuf);
1726
1727         if (!change_pathname(file, NULL, 0))
1728                 exit_cleanup(RERR_FILESELECT);
1729
1730         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1731
1732         if (file->flags & FLAG_CONTENT_DIR) {
1733                 if (one_file_system) {
1734                         STRUCT_STAT st;
1735                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1736                                 io_error |= IOERR_GENERAL;
1737                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1738                                         full_fname(fbuf));
1739                                 return;
1740                         }
1741                         filesystem_dev = st.st_dev;
1742                 }
1743                 send_directory(f, flist, fbuf, dlen, flags);
1744         }
1745
1746         if (!relative_paths)
1747                 return;
1748
1749         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1750         if (!relname_list)
1751                 return;
1752
1753         for (j = 0; j < relname_list->count; j++) {
1754                 char *slash;
1755                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1756                 char name_type = rnp->name_type;
1757
1758                 fbuf[dlen] = '/';
1759                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1760                 free(rnp);
1761                 if (len >= (int)sizeof fbuf)
1762                         continue; /* Impossible... */
1763
1764                 slash = strchr(fbuf+dlen+1, '/');
1765                 if (slash) {
1766                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1767                         continue;
1768                 }
1769
1770                 if (name_type != NORMAL_NAME) {
1771                         STRUCT_STAT st;
1772                         if (link_stat(fbuf, &st, 1) != 0) {
1773                                 io_error |= IOERR_GENERAL;
1774                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1775                                         full_fname(fbuf));
1776                                 continue;
1777                         }
1778                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1779                 } else
1780                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1781         }
1782
1783         free(relname_list);
1784 }
1785
1786 void send_extra_file_list(int f, int at_least)
1787 {
1788         struct file_list *flist;
1789         int64 start_write;
1790         uint16 prev_flags;
1791         int old_cnt, save_io_error = io_error;
1792
1793         if (flist_eof)
1794                 return;
1795
1796         /* Keep sending data until we have the requested number of
1797          * files in the upcoming file-lists. */
1798         old_cnt = cur_flist->used;
1799         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1800                 old_cnt += flist->used;
1801         while (file_total - old_cnt < at_least) {
1802                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1803                 int dir_ndx, dstart = dir_count;
1804                 const char *pathname = F_PATHNAME(file);
1805                 int32 *dp;
1806
1807                 flist = flist_new(0, "send_extra_file_list");
1808                 start_write = stats.total_written;
1809
1810                 if (unsort_ndx)
1811                         dir_ndx = F_NDX(file);
1812                 else
1813                         dir_ndx = send_dir_ndx;
1814                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1815                 flist->parent_ndx = dir_ndx;
1816
1817                 send1extra(f, file, flist);
1818                 prev_flags = file->flags;
1819                 dp = F_DIR_NODE_P(file);
1820
1821                 /* If there are any duplicate directory names that follow, we
1822                  * send all the dirs together in one file-list.  The dir_flist
1823                  * tree links all the child subdirs onto the last dup dir. */
1824                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1825                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1826                         send_dir_ndx = dir_ndx;
1827                         file = dir_flist->sorted[dir_ndx];
1828                         /* Try to avoid some duplicate scanning of identical dirs. */
1829                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1830                                 file->flags &= ~FLAG_CONTENT_DIR;
1831                         send1extra(f, file, flist);
1832                         prev_flags = file->flags;
1833                         dp = F_DIR_NODE_P(file);
1834                 }
1835
1836                 write_byte(f, 0);
1837
1838                 if (need_unsorted_flist) {
1839                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1840                                 out_of_memory("send_extra_file_list");
1841                         memcpy(flist->sorted, flist->files,
1842                                flist->used * sizeof (struct file_struct*));
1843                 } else
1844                         flist->sorted = flist->files;
1845
1846                 flist_sort_and_clean(flist, 0);
1847
1848                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1849                 flist_done_allocating(flist);
1850
1851                 file_total += flist->used;
1852                 stats.flist_size += stats.total_written - start_write;
1853                 stats.num_files += flist->used;
1854                 if (DEBUG_GTE(FLIST, 3))
1855                         output_flist(flist);
1856
1857                 if (DIR_FIRST_CHILD(dp) >= 0) {
1858                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1859                         send_dir_depth++;
1860                 } else {
1861                         while (DIR_NEXT_SIBLING(dp) < 0) {
1862                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1863                                         write_ndx(f, NDX_FLIST_EOF);
1864                                         flist_eof = 1;
1865                                         change_local_filter_dir(NULL, 0, 0);
1866                                         goto finish;
1867                                 }
1868                                 send_dir_depth--;
1869                                 file = dir_flist->sorted[send_dir_ndx];
1870                                 dp = F_DIR_NODE_P(file);
1871                         }
1872                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1873                 }
1874         }
1875
1876   finish:
1877         if (io_error != save_io_error && !ignore_errors)
1878                 send_msg_int(MSG_IO_ERROR, io_error);
1879 }
1880
1881 struct file_list *send_file_list(int f, int argc, char *argv[])
1882 {
1883         static const char *lastdir;
1884         static int lastdir_len = -1;
1885         int len, dirlen;
1886         STRUCT_STAT st;
1887         char *p, *dir;
1888         struct file_list *flist;
1889         struct timeval start_tv, end_tv;
1890         int64 start_write;
1891         int use_ff_fd = 0;
1892         int disable_buffering;
1893         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1894         int reading_remotely = filesfrom_host != NULL;
1895         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1896 #ifdef ICONV_OPTION
1897                      | (filesfrom_convert ? RL_CONVERT : 0)
1898 #endif
1899                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1900         int implied_dot_dir = 0;
1901
1902         rprintf(FLOG, "building file list\n");
1903         if (show_filelist_p())
1904                 start_filelist_progress("building file list");
1905         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
1906                 rprintf(FCLIENT, "sending incremental file list\n");
1907
1908         start_write = stats.total_written;
1909         gettimeofday(&start_tv, NULL);
1910
1911         if (!orig_dir)
1912                 orig_dir = strdup(curr_dir);
1913
1914         if (relative_paths && protocol_version >= 30)
1915                 implied_dirs = 1; /* We send flagged implied dirs */
1916
1917 #ifdef SUPPORT_HARD_LINKS
1918         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1919                 init_hard_links();
1920 #endif
1921
1922         flist = cur_flist = flist_new(0, "send_file_list");
1923         if (inc_recurse) {
1924                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1925                 flags |= FLAG_DIVERT_DIRS;
1926         } else
1927                 dir_flist = cur_flist;
1928
1929         disable_buffering = io_start_buffering_out(f);
1930         if (filesfrom_fd >= 0) {
1931                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
1932                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
1933                                 full_fname(argv[0]));
1934                         exit_cleanup(RERR_FILESELECT);
1935                 }
1936                 use_ff_fd = 1;
1937         }
1938
1939         while (1) {
1940                 char fbuf[MAXPATHLEN], *fn, name_type;
1941
1942                 if (use_ff_fd) {
1943                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1944                                 break;
1945                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1946                 } else {
1947                         if (argc-- == 0)
1948                                 break;
1949                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1950                         if (sanitize_paths)
1951                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1952                 }
1953
1954                 len = strlen(fbuf);
1955                 if (relative_paths) {
1956                         /* We clean up fbuf below. */
1957                         name_type = NORMAL_NAME;
1958                 } else if (!len || fbuf[len - 1] == '/') {
1959                         if (len == 2 && fbuf[0] == '.') {
1960                                 /* Turn "./" into just "." rather than "./." */
1961                                 fbuf[--len] = '\0';
1962                         } else {
1963                                 if (len + 1 >= MAXPATHLEN)
1964                                         overflow_exit("send_file_list");
1965                                 fbuf[len++] = '.';
1966                                 fbuf[len] = '\0';
1967                         }
1968                         name_type = DOTDIR_NAME;
1969                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1970                     && (len == 2 || fbuf[len-3] == '/')) {
1971                         if (len + 2 >= MAXPATHLEN)
1972                                 overflow_exit("send_file_list");
1973                         fbuf[len++] = '/';
1974                         fbuf[len++] = '.';
1975                         fbuf[len] = '\0';
1976                         name_type = DOTDIR_NAME;
1977                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1978                         name_type = DOTDIR_NAME;
1979                 else
1980                         name_type = NORMAL_NAME;
1981
1982                 dir = NULL;
1983
1984                 if (!relative_paths) {
1985                         p = strrchr(fbuf, '/');
1986                         if (p) {
1987                                 *p = '\0';
1988                                 if (p == fbuf)
1989                                         dir = "/";
1990                                 else
1991                                         dir = fbuf;
1992                                 len -= p - fbuf + 1;
1993                                 fn = p + 1;
1994                         } else
1995                                 fn = fbuf;
1996                 } else {
1997                         if ((p = strstr(fbuf, "/./")) != NULL) {
1998                                 *p = '\0';
1999                                 if (p == fbuf)
2000                                         dir = "/";
2001                                 else {
2002                                         dir = fbuf;
2003                                         clean_fname(dir, 0);
2004                                 }
2005                                 fn = p + 3;
2006                                 while (*fn == '/')
2007                                         fn++;
2008                                 if (!*fn)
2009                                         *--fn = '\0'; /* ensure room for '.' */
2010                         } else
2011                                 fn = fbuf;
2012                         /* A leading ./ can be used in relative mode to affect
2013                          * the dest dir without its name being in the path. */
2014                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2015                                 send_file_name(f, flist, ".", NULL,
2016                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2017                                     ALL_FILTERS);
2018                                 implied_dot_dir = 1;
2019                         }
2020                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2021                                             | CFN_DROP_TRAILING_DOT_DIR);
2022                         if (len == 1) {
2023                                 if (fn[0] == '/') {
2024                                         fn = "/.";
2025                                         len = 2;
2026                                         name_type = DOTDIR_NAME;
2027                                 } else if (fn[0] == '.')
2028                                         name_type = DOTDIR_NAME;
2029                         } else if (fn[len-1] == '/') {
2030                                 fn[--len] = '\0';
2031                                 if (len == 1 && *fn == '.')
2032                                         name_type = DOTDIR_NAME;
2033                                 else
2034                                         name_type = SLASH_ENDING_NAME;
2035                         }
2036                         /* Reject a ".." dir in the active part of the path. */
2037                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2038                                 if ((p[2] == '/' || p[2] == '\0')
2039                                  && (p == fn || p[-1] == '/')) {
2040                                         rprintf(FERROR,
2041                                             "found \"..\" dir in relative path: %s\n",
2042                                             fn);
2043                                         exit_cleanup(RERR_SYNTAX);
2044                                 }
2045                         }
2046                 }
2047
2048                 if (!*fn) {
2049                         len = 1;
2050                         fn = ".";
2051                         name_type = DOTDIR_NAME;
2052                 }
2053
2054                 dirlen = dir ? strlen(dir) : 0;
2055                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2056                         if (!change_pathname(NULL, dir, -dirlen))
2057                                 continue;
2058                         lastdir = pathname;
2059                         lastdir_len = pathname_len;
2060                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2061                         continue;
2062
2063                 if (fn != fbuf)
2064                         memmove(fbuf, fn, len + 1);
2065
2066                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2067                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2068                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2069                         io_error |= IOERR_GENERAL;
2070                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2071                                 full_fname(fbuf));
2072                         continue;
2073                 }
2074
2075                 /* A dot-dir should not be excluded! */
2076                 if (name_type != DOTDIR_NAME
2077                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2078                         continue;
2079
2080                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2081                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2082                         continue;
2083                 }
2084
2085                 if (inc_recurse && relative_paths && *fbuf) {
2086                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2087                                 if (p - fbuf == 1 && *fbuf == '.') {
2088                                         if ((fn = strchr(p+1, '/')) != NULL)
2089                                                 p = fn;
2090                                 } else
2091                                         fn = p;
2092                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2093                                 if (fn == p)
2094                                         continue;
2095                         }
2096                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2097                         /* Send the implied directories at the start of the
2098                          * source spec, so we get their permissions right. */
2099                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2100                 }
2101
2102                 if (one_file_system)
2103                         filesystem_dev = st.st_dev;
2104
2105                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2106                         struct file_struct *file;
2107                         file = send_file_name(f, flist, fbuf, &st,
2108                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2109                                               NO_FILTERS);
2110                         if (!file)
2111                                 continue;
2112                         if (inc_recurse) {
2113                                 if (name_type == DOTDIR_NAME) {
2114                                         if (send_dir_depth < 0) {
2115                                                 send_dir_depth = 0;
2116                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2117                                         }
2118                                         send_directory(f, flist, fbuf, len, flags);
2119                                 }
2120                         } else
2121                                 send_if_directory(f, flist, file, fbuf, len, flags);
2122                 } else
2123                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2124         }
2125
2126         gettimeofday(&end_tv, NULL);
2127         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2128                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2129         if (stats.flist_buildtime == 0)
2130                 stats.flist_buildtime = 1;
2131         start_tv = end_tv;
2132
2133         write_byte(f, 0); /* Indicate end of file list */
2134
2135 #ifdef SUPPORT_HARD_LINKS
2136         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2137                 idev_destroy();
2138 #endif
2139
2140         if (show_filelist_p())
2141                 finish_filelist_progress(flist);
2142
2143         gettimeofday(&end_tv, NULL);
2144         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2145                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2146
2147         /* When converting names, both sides keep an unsorted file-list array
2148          * because the names will differ on the sending and receiving sides
2149          * (both sides will use the unsorted index number for each item). */
2150
2151         /* Sort the list without removing any duplicates.  This allows the
2152          * receiving side to ask for whatever name it kept.  For incremental
2153          * recursion mode, the sender marks duplicate dirs so that it can
2154          * send them together in a single file-list. */
2155         if (need_unsorted_flist) {
2156                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2157                         out_of_memory("send_file_list");
2158                 memcpy(flist->sorted, flist->files,
2159                        flist->used * sizeof (struct file_struct*));
2160         } else
2161                 flist->sorted = flist->files;
2162         flist_sort_and_clean(flist, 0);
2163         file_total += flist->used;
2164
2165         if (numeric_ids <= 0 && !inc_recurse)
2166                 send_id_list(f);
2167
2168         /* send the io_error flag */
2169         if (protocol_version < 30)
2170                 write_int(f, ignore_errors ? 0 : io_error);
2171         else if (io_error && !ignore_errors)
2172                 send_msg_int(MSG_IO_ERROR, io_error);
2173
2174         if (disable_buffering)
2175                 io_end_buffering_out();
2176
2177         stats.flist_size = stats.total_written - start_write;
2178         stats.num_files = flist->used;
2179
2180         if (DEBUG_GTE(FLIST, 3))
2181                 output_flist(flist);
2182
2183         if (DEBUG_GTE(FLIST, 2))
2184                 rprintf(FINFO, "send_file_list done\n");
2185
2186         if (inc_recurse) {
2187                 send_dir_depth = 1;
2188                 add_dirs_to_tree(-1, flist, dir_count);
2189                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2190                         flist->parent_ndx = -1;
2191                 flist_done_allocating(flist);
2192                 if (send_dir_ndx < 0) {
2193                         write_ndx(f, NDX_FLIST_EOF);
2194                         flist_eof = 1;
2195                 }
2196                 else if (file_total == 1) {
2197                         /* If we're creating incremental file-lists and there
2198                          * was just 1 item in the first file-list, send 1 more
2199                          * file-list to check if this is a 1-file xfer. */
2200                         send_extra_file_list(f, 1);
2201                 }
2202         }
2203
2204         return flist;
2205 }
2206
2207 struct file_list *recv_file_list(int f)
2208 {
2209         struct file_list *flist;
2210         int dstart, flags;
2211         int64 start_read;
2212
2213         if (!first_flist) {
2214                 if (show_filelist_p())
2215                         start_filelist_progress("receiving file list");
2216                 else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
2217                         rprintf(FCLIENT, "receiving incremental file list\n");
2218                 rprintf(FLOG, "receiving file list\n");
2219         }
2220
2221         start_read = stats.total_read;
2222
2223 #ifdef SUPPORT_HARD_LINKS
2224         if (preserve_hard_links && !first_flist)
2225                 init_hard_links();
2226 #endif
2227
2228         flist = flist_new(0, "recv_file_list");
2229
2230         if (inc_recurse) {
2231                 if (flist->ndx_start == 1)
2232                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2233                 dstart = dir_flist->used;
2234         } else {
2235                 dir_flist = flist;
2236                 dstart = 0;
2237         }
2238
2239         while ((flags = read_byte(f)) != 0) {
2240                 struct file_struct *file;
2241
2242                 flist_expand(flist, 1);
2243
2244                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2245                         flags |= read_byte(f) << 8;
2246                 file = recv_file_entry(flist, flags, f);
2247
2248                 if (inc_recurse && S_ISDIR(file->mode)) {
2249                         flist_expand(dir_flist, 1);
2250                         dir_flist->files[dir_flist->used++] = file;
2251                 }
2252
2253                 flist->files[flist->used++] = file;
2254
2255                 maybe_emit_filelist_progress(flist->used);
2256
2257                 if (DEBUG_GTE(FLIST, 2)) {
2258                         rprintf(FINFO, "recv_file_name(%s)\n",
2259                                 f_name(file, NULL));
2260                 }
2261         }
2262         file_total += flist->used;
2263
2264         if (DEBUG_GTE(FLIST, 2))
2265                 rprintf(FINFO, "received %d names\n", flist->used);
2266
2267         if (show_filelist_p())
2268                 finish_filelist_progress(flist);
2269
2270         if (need_unsorted_flist) {
2271                 /* Create an extra array of index pointers that we can sort for
2272                  * the generator's use (for wading through the files in sorted
2273                  * order and for calling flist_find()).  We keep the "files"
2274                  * list unsorted for our exchange of index numbers with the
2275                  * other side (since their names may not sort the same). */
2276                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2277                         out_of_memory("recv_file_list");
2278                 memcpy(flist->sorted, flist->files,
2279                        flist->used * sizeof (struct file_struct*));
2280                 if (inc_recurse && dir_flist->used > dstart) {
2281                         static int dir_flist_malloced = 0;
2282                         if (dir_flist_malloced < dir_flist->malloced) {
2283                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2284                                                         struct file_struct *,
2285                                                         dir_flist->malloced);
2286                                 dir_flist_malloced = dir_flist->malloced;
2287                         }
2288                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2289                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2290                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2291                 }
2292         } else {
2293                 flist->sorted = flist->files;
2294                 if (inc_recurse && dir_flist->used > dstart) {
2295                         dir_flist->sorted = dir_flist->files;
2296                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2297                 }
2298         }
2299
2300         if (inc_recurse)
2301                 flist_done_allocating(flist);
2302         else if (f >= 0)
2303                 recv_id_list(f, flist);
2304
2305         flist_sort_and_clean(flist, relative_paths);
2306
2307         if (protocol_version < 30) {
2308                 /* Recv the io_error flag */
2309                 if (ignore_errors)
2310                         read_int(f);
2311                 else
2312                         io_error |= read_int(f);
2313         } else if (inc_recurse && flist->ndx_start == 1) {
2314                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2315                         flist->parent_ndx = -1;
2316         }
2317
2318         if (DEBUG_GTE(FLIST, 3))
2319                 output_flist(flist);
2320
2321         if (DEBUG_GTE(FLIST, 2))
2322                 rprintf(FINFO, "recv_file_list done\n");
2323
2324         stats.flist_size += stats.total_read - start_read;
2325         stats.num_files += flist->used;
2326
2327         return flist;
2328 }
2329
2330 /* This is only used once by the receiver if the very first file-list
2331  * has exactly one item in it. */
2332 void recv_additional_file_list(int f)
2333 {
2334         struct file_list *flist;
2335         int ndx = read_ndx(f);
2336         if (ndx == NDX_FLIST_EOF) {
2337                 flist_eof = 1;
2338                 change_local_filter_dir(NULL, 0, 0);
2339         } else {
2340                 ndx = NDX_FLIST_OFFSET - ndx;
2341                 if (ndx < 0 || ndx >= dir_flist->used) {
2342                         ndx = NDX_FLIST_OFFSET - ndx;
2343                         rprintf(FERROR,
2344                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2345                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2346                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2347                         exit_cleanup(RERR_PROTOCOL);
2348                 }
2349                 if (DEBUG_GTE(FLIST, 3)) {
2350                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2351                                 who_am_i(), ndx);
2352                 }
2353                 flist = recv_file_list(f);
2354                 flist->parent_ndx = ndx;
2355         }
2356 }
2357
2358 /* Search for an identically-named item in the file list.  Note that the
2359  * items must agree in their directory-ness, or no match is returned. */
2360 int flist_find(struct file_list *flist, struct file_struct *f)
2361 {
2362         int low = flist->low, high = flist->high;
2363         int diff, mid, mid_up;
2364
2365         while (low <= high) {
2366                 mid = (low + high) / 2;
2367                 if (F_IS_ACTIVE(flist->sorted[mid]))
2368                         mid_up = mid;
2369                 else {
2370                         /* Scan for the next non-empty entry using the cached
2371                          * distance values.  If the value isn't fully up-to-
2372                          * date, update it. */
2373                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2374                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2375                                 do {
2376                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2377                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2378                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2379                         }
2380                         if (mid_up > high) {
2381                                 /* If there's nothing left above us, set high to
2382                                  * a non-empty entry below us and continue. */
2383                                 high = mid - (int)flist->sorted[mid]->len32;
2384                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2385                                         do {
2386                                             high -= (int)flist->sorted[high]->len32;
2387                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2388                                         flist->sorted[mid]->len32 = mid - high;
2389                                 }
2390                                 continue;
2391                         }
2392                 }
2393                 diff = f_name_cmp(flist->sorted[mid_up], f);
2394                 if (diff == 0) {
2395                         if (protocol_version < 29
2396                             && S_ISDIR(flist->sorted[mid_up]->mode)
2397                             != S_ISDIR(f->mode))
2398                                 return -1;
2399                         return mid_up;
2400                 }
2401                 if (diff < 0)
2402                         low = mid_up + 1;
2403                 else
2404                         high = mid - 1;
2405         }
2406         return -1;
2407 }
2408
2409 /*
2410  * Free up any resources a file_struct has allocated
2411  * and clear the file.
2412  */
2413 void clear_file(struct file_struct *file)
2414 {
2415         /* The +1 zeros out the first char of the basename. */
2416         memset(file, 0, FILE_STRUCT_LEN + 1);
2417         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2418          * entry.  Likewise for len32 in the opposite direction.  We assume
2419          * that we're alone for now since flist_find() will adjust the counts
2420          * it runs into that aren't up-to-date. */
2421         file->len32 = F_DEPTH(file) = 1;
2422 }
2423
2424 /* Allocate a new file list. */
2425 struct file_list *flist_new(int flags, char *msg)
2426 {
2427         struct file_list *flist;
2428
2429         if (!(flist = new0(struct file_list)))
2430                 out_of_memory(msg);
2431
2432         if (flags & FLIST_TEMP) {
2433                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2434                                                      out_of_memory,
2435                                                      POOL_INTERN|POOL_QALIGN)))
2436                         out_of_memory(msg);
2437         } else {
2438                 /* This is a doubly linked list with prev looping back to
2439                  * the end of the list, but the last next pointer is NULL. */
2440                 if (!first_flist) {
2441                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2442                                                        out_of_memory,
2443                                                        POOL_INTERN|POOL_QALIGN);
2444                         if (!flist->file_pool)
2445                                 out_of_memory(msg);
2446
2447                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2448
2449                         first_flist = cur_flist = flist->prev = flist;
2450                 } else {
2451                         struct file_list *prev = first_flist->prev;
2452
2453                         flist->file_pool = first_flist->file_pool;
2454
2455                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2456                         flist->flist_num = prev->flist_num + 1;
2457
2458                         flist->prev = prev;
2459                         prev->next = first_flist->prev = flist;
2460                 }
2461                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2462                 flist_cnt++;
2463         }
2464
2465         return flist;
2466 }
2467
2468 /* Free up all elements in a flist. */
2469 void flist_free(struct file_list *flist)
2470 {
2471         if (!flist->prev) {
2472                 /* Was FLIST_TEMP dir-list. */
2473         } else if (flist == flist->prev) {
2474                 first_flist = cur_flist = NULL;
2475                 file_total = 0;
2476                 flist_cnt = 0;
2477         } else {
2478                 if (flist == cur_flist)
2479                         cur_flist = flist->next;
2480                 if (flist == first_flist)
2481                         first_flist = first_flist->next;
2482                 else {
2483                         flist->prev->next = flist->next;
2484                         if (!flist->next)
2485                                 flist->next = first_flist;
2486                 }
2487                 flist->next->prev = flist->prev;
2488                 file_total -= flist->used;
2489                 flist_cnt--;
2490         }
2491
2492         if (!flist->prev || !flist_cnt)
2493                 pool_destroy(flist->file_pool);
2494         else
2495                 pool_free_old(flist->file_pool, flist->pool_boundary);
2496
2497         if (flist->sorted && flist->sorted != flist->files)
2498                 free(flist->sorted);
2499         free(flist->files);
2500         free(flist);
2501 }
2502
2503 /* This routine ensures we don't have any duplicate names in our file list.
2504  * duplicate names can cause corruption because of the pipelining. */
2505 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2506 {
2507         char fbuf[MAXPATHLEN];
2508         int i, prev_i;
2509
2510         if (!flist)
2511                 return;
2512         if (flist->used == 0) {
2513                 flist->high = -1;
2514                 flist->low = 0;
2515                 return;
2516         }
2517
2518         fsort(flist->sorted, flist->used);
2519
2520         if (!am_sender || inc_recurse) {
2521                 for (i = prev_i = 0; i < flist->used; i++) {
2522                         if (F_IS_ACTIVE(flist->sorted[i])) {
2523                                 prev_i = i;
2524                                 break;
2525                         }
2526                 }
2527                 flist->low = prev_i;
2528         } else {
2529                 i = prev_i = flist->used - 1;
2530                 flist->low = 0;
2531         }
2532
2533         while (++i < flist->used) {
2534                 int j;
2535                 struct file_struct *file = flist->sorted[i];
2536
2537                 if (!F_IS_ACTIVE(file))
2538                         continue;
2539                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2540                         j = prev_i;
2541                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2542                         int save_mode = file->mode;
2543                         /* Make sure that this directory doesn't duplicate a
2544                          * non-directory earlier in the list. */
2545                         flist->high = prev_i;
2546                         file->mode = S_IFREG;
2547                         j = flist_find(flist, file);
2548                         file->mode = save_mode;
2549                 } else
2550                         j = -1;
2551                 if (j >= 0) {
2552                         int keep, drop;
2553                         /* If one is a dir and the other is not, we want to
2554                          * keep the dir because it might have contents in the
2555                          * list.  Otherwise keep the first one. */
2556                         if (S_ISDIR(file->mode)) {
2557                                 struct file_struct *fp = flist->sorted[j];
2558                                 if (!S_ISDIR(fp->mode))
2559                                         keep = i, drop = j;
2560                                 else {
2561                                         if (am_sender)
2562                                                 file->flags |= FLAG_DUPLICATE;
2563                                         else { /* Make sure we merge our vital flags. */
2564                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2565                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2566                                         }
2567                                         keep = j, drop = i;
2568                                 }
2569                         } else
2570                                 keep = j, drop = i;
2571
2572                         if (!am_sender) {
2573                                 if (DEBUG_GTE(DUP, 1)) {
2574                                         rprintf(FINFO,
2575                                             "removing duplicate name %s from file list (%d)\n",
2576                                             f_name(file, fbuf), drop + flist->ndx_start);
2577                                 }
2578                                 clear_file(flist->sorted[drop]);
2579                         }
2580
2581                         if (keep == i) {
2582                                 if (flist->low == drop) {
2583                                         for (j = drop + 1;
2584                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2585                                              j++) {}
2586                                         flist->low = j;
2587                                 }
2588                                 prev_i = i;
2589                         }
2590                 } else
2591                         prev_i = i;
2592         }
2593         flist->high = prev_i;
2594
2595         if (strip_root) {
2596                 /* We need to strip off the leading slashes for relative
2597                  * paths, but this must be done _after_ the sorting phase. */
2598                 for (i = flist->low; i <= flist->high; i++) {
2599                         struct file_struct *file = flist->sorted[i];
2600
2601                         if (!file->dirname)
2602                                 continue;
2603                         while (*file->dirname == '/')
2604                                 file->dirname++;
2605                         if (!*file->dirname)
2606                                 file->dirname = NULL;
2607                 }
2608         }
2609
2610         if (prune_empty_dirs && !am_sender) {
2611                 int j, prev_depth = 0;
2612
2613                 prev_i = 0; /* It's OK that this isn't really true. */
2614
2615                 for (i = flist->low; i <= flist->high; i++) {
2616                         struct file_struct *fp, *file = flist->sorted[i];
2617
2618                         /* This temporarily abuses the F_DEPTH() value for a
2619                          * directory that is in a chain that might get pruned.
2620                          * We restore the old value if it gets a reprieve. */
2621                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2622                                 /* Dump empty dirs when coming back down. */
2623                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2624                                         fp = flist->sorted[prev_i];
2625                                         if (F_DEPTH(fp) >= 0)
2626                                                 break;
2627                                         prev_i = -F_DEPTH(fp)-1;
2628                                         clear_file(fp);
2629                                 }
2630                                 prev_depth = F_DEPTH(file);
2631                                 if (is_excluded(f_name(file, fbuf), 1,
2632                                                        ALL_FILTERS)) {
2633                                         /* Keep dirs through this dir. */
2634                                         for (j = prev_depth-1; ; j--) {
2635                                                 fp = flist->sorted[prev_i];
2636                                                 if (F_DEPTH(fp) >= 0)
2637                                                         break;
2638                                                 prev_i = -F_DEPTH(fp)-1;
2639                                                 F_DEPTH(fp) = j;
2640                                         }
2641                                 } else
2642                                         F_DEPTH(file) = -prev_i-1;
2643                                 prev_i = i;
2644                         } else {
2645                                 /* Keep dirs through this non-dir. */
2646                                 for (j = prev_depth; ; j--) {
2647                                         fp = flist->sorted[prev_i];
2648                                         if (F_DEPTH(fp) >= 0)
2649                                                 break;
2650                                         prev_i = -F_DEPTH(fp)-1;
2651                                         F_DEPTH(fp) = j;
2652                                 }
2653                         }
2654                 }
2655                 /* Dump all remaining empty dirs. */
2656                 while (1) {
2657                         struct file_struct *fp = flist->sorted[prev_i];
2658                         if (F_DEPTH(fp) >= 0)
2659                                 break;
2660                         prev_i = -F_DEPTH(fp)-1;
2661                         clear_file(fp);
2662                 }
2663
2664                 for (i = flist->low; i <= flist->high; i++) {
2665                         if (F_IS_ACTIVE(flist->sorted[i]))
2666                                 break;
2667                 }
2668                 flist->low = i;
2669                 for (i = flist->high; i >= flist->low; i--) {
2670                         if (F_IS_ACTIVE(flist->sorted[i]))
2671                                 break;
2672                 }
2673                 flist->high = i;
2674         }
2675 }
2676
2677 static void output_flist(struct file_list *flist)
2678 {
2679         char uidbuf[16], gidbuf[16], depthbuf[16];
2680         struct file_struct *file;
2681         const char *root, *dir, *slash, *name, *trail;
2682         const char *who = who_am_i();
2683         int i;
2684
2685         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2686                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2687         for (i = 0; i < flist->used; i++) {
2688                 file = flist->files[i];
2689                 if ((am_root || am_sender) && uid_ndx) {
2690                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2691                                  F_OWNER(file));
2692                 } else
2693                         *uidbuf = '\0';
2694                 if (gid_ndx) {
2695                         static char parens[] = "(\0)\0\0\0";
2696                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2697                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2698                                  pp, F_GROUP(file), pp + 2);
2699                 } else
2700                         *gidbuf = '\0';
2701                 if (!am_sender)
2702                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2703                 if (F_IS_ACTIVE(file)) {
2704                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2705                         if ((dir = file->dirname) == NULL)
2706                                 dir = slash = "";
2707                         else
2708                                 slash = "/";
2709                         name = file->basename;
2710                         trail = S_ISDIR(file->mode) ? "/" : "";
2711                 } else
2712                         root = dir = slash = name = trail = "";
2713                 rprintf(FINFO,
2714                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n",
2715                         who, i + flist->ndx_start,
2716                         root, dir, slash, name, trail,
2717                         (int)file->mode, big_num(F_LENGTH(file), 0),
2718                         uidbuf, gidbuf, file->flags);
2719         }
2720 }
2721
2722 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2723 enum fnc_type { t_PATH, t_ITEM };
2724
2725 static int found_prefix;
2726
2727 /* Compare the names of two file_struct entities, similar to how strcmp()
2728  * would do if it were operating on the joined strings.
2729  *
2730  * Some differences beginning with protocol_version 29: (1) directory names
2731  * are compared with an assumed trailing slash so that they compare in a
2732  * way that would cause them to sort immediately prior to any content they
2733  * may have; (2) a directory of any name compares after a non-directory of
2734  * any name at the same depth; (3) a directory with name "." compares prior
2735  * to anything else.  These changes mean that a directory and a non-dir
2736  * with the same name will not compare as equal (protocol_version >= 29).
2737  *
2738  * The dirname component can be an empty string, but the basename component
2739  * cannot (and never is in the current codebase).  The basename component
2740  * may be NULL (for a removed item), in which case it is considered to be
2741  * after any existing item. */
2742 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2743 {
2744         int dif;
2745         const uchar *c1, *c2;
2746         enum fnc_state state1, state2;
2747         enum fnc_type type1, type2;
2748         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2749
2750         if (!f1 || !F_IS_ACTIVE(f1)) {
2751                 if (!f2 || !F_IS_ACTIVE(f2))
2752                         return 0;
2753                 return -1;
2754         }
2755         if (!f2 || !F_IS_ACTIVE(f2))
2756                 return 1;
2757
2758         c1 = (uchar*)f1->dirname;
2759         c2 = (uchar*)f2->dirname;
2760         if (c1 == c2)
2761                 c1 = c2 = NULL;
2762         if (!c1) {
2763                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2764                 c1 = (const uchar*)f1->basename;
2765                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2766                         type1 = t_ITEM;
2767                         state1 = s_TRAILING;
2768                         c1 = (uchar*)"";
2769                 } else
2770                         state1 = s_BASE;
2771         } else {
2772                 type1 = t_path;
2773                 state1 = s_DIR;
2774         }
2775         if (!c2) {
2776                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2777                 c2 = (const uchar*)f2->basename;
2778                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2779                         type2 = t_ITEM;
2780                         state2 = s_TRAILING;
2781                         c2 = (uchar*)"";
2782                 } else
2783                         state2 = s_BASE;
2784         } else {
2785                 type2 = t_path;
2786                 state2 = s_DIR;
2787         }
2788
2789         if (type1 != type2)
2790                 return type1 == t_PATH ? 1 : -1;
2791
2792         do {
2793                 if (!*c1) {
2794                         switch (state1) {
2795                         case s_DIR:
2796                                 state1 = s_SLASH;
2797                                 c1 = (uchar*)"/";
2798                                 break;
2799                         case s_SLASH:
2800                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2801                                 c1 = (const uchar*)f1->basename;
2802                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2803                                         type1 = t_ITEM;
2804                                         state1 = s_TRAILING;
2805                                         c1 = (uchar*)"";
2806                                 } else
2807                                         state1 = s_BASE;
2808                                 break;
2809                         case s_BASE:
2810                                 state1 = s_TRAILING;
2811                                 if (type1 == t_PATH) {
2812                                         c1 = (uchar*)"/";
2813                                         break;
2814                                 }
2815                                 /* FALL THROUGH */
2816                         case s_TRAILING:
2817                                 type1 = t_ITEM;
2818                                 break;
2819                         }
2820                         if (*c2 && type1 != type2)
2821                                 return type1 == t_PATH ? 1 : -1;
2822                 }
2823                 if (!*c2) {
2824                         switch (state2) {
2825                         case s_DIR:
2826                                 state2 = s_SLASH;
2827                                 c2 = (uchar*)"/";
2828                                 break;
2829                         case s_SLASH:
2830                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2831                                 c2 = (const uchar*)f2->basename;
2832                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2833                                         type2 = t_ITEM;
2834                                         state2 = s_TRAILING;
2835                                         c2 = (uchar*)"";
2836                                 } else
2837                                         state2 = s_BASE;
2838                                 break;
2839                         case s_BASE:
2840                                 state2 = s_TRAILING;
2841                                 if (type2 == t_PATH) {
2842                                         c2 = (uchar*)"/";
2843                                         break;
2844                                 }
2845                                 /* FALL THROUGH */
2846                         case s_TRAILING:
2847                                 found_prefix = 1;
2848                                 if (!*c1)
2849                                         return 0;
2850                                 type2 = t_ITEM;
2851                                 break;
2852                         }
2853                         if (type1 != type2)
2854                                 return type1 == t_PATH ? 1 : -1;
2855                 }
2856         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2857
2858         return dif;
2859 }
2860
2861 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2862  * not match if f2's basename is not an exact match of a path element in f1.
2863  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2864 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2865 {
2866         found_prefix = 0;
2867         f_name_cmp(f1, f2);
2868         return found_prefix;
2869 }
2870
2871 char *f_name_buf(void)
2872 {
2873         static char names[5][MAXPATHLEN];
2874         static unsigned int n;
2875
2876         n = (n + 1) % (sizeof names / sizeof names[0]);
2877
2878         return names[n];
2879 }
2880
2881 /* Return a copy of the full filename of a flist entry, using the indicated
2882  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2883  * done because we checked the size when creating the file_struct entry.
2884  */
2885 char *f_name(const struct file_struct *f, char *fbuf)
2886 {
2887         if (!f || !F_IS_ACTIVE(f))
2888                 return NULL;
2889
2890         if (!fbuf)
2891                 fbuf = f_name_buf();
2892
2893         if (f->dirname) {
2894                 int len = strlen(f->dirname);
2895                 memcpy(fbuf, f->dirname, len);
2896                 fbuf[len] = '/';
2897                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2898         } else
2899                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2900
2901         return fbuf;
2902 }
2903
2904 /* Do a non-recursive scan of the named directory, possibly ignoring all
2905  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2906  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2907  * buffer (the functions we call will append names onto the end, but the old
2908  * dir value will be restored on exit). */
2909 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2910 {
2911         struct file_list *dirlist;
2912         char dirbuf[MAXPATHLEN];
2913         int save_recurse = recurse;
2914         int save_xfer_dirs = xfer_dirs;
2915         int save_prune_empty_dirs = prune_empty_dirs;
2916
2917         if (dlen < 0) {
2918                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2919                 if (dlen >= MAXPATHLEN)
2920                         return NULL;
2921                 dirname = dirbuf;
2922         }
2923
2924         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2925
2926         recurse = 0;
2927         xfer_dirs = 1;
2928         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2929         xfer_dirs = save_xfer_dirs;
2930         recurse = save_recurse;
2931         if (INFO_GTE(PROGRESS, 1))
2932                 flist_count_offset += dirlist->used;
2933
2934         prune_empty_dirs = 0;
2935         dirlist->sorted = dirlist->files;
2936         flist_sort_and_clean(dirlist, 0);
2937         prune_empty_dirs = save_prune_empty_dirs;
2938
2939         if (DEBUG_GTE(FLIST, 3))
2940                 output_flist(dirlist);
2941
2942         return dirlist;
2943 }