flist.c

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