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