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 sender_symlink_iconv;
  71 extern int unsort_ndx;
  72 extern struct stats stats;
  73 extern char *filesfrom_host;
  74
  75 extern char curr_dir[MAXPATHLEN];
  76
  77 extern struct chmod_mode_struct *chmod_modes;
  78
  79 extern struct filter_list_struct filter_list;
  80 extern struct filter_list_struct daemon_filter_list;
  81
  82 #ifdef ICONV_OPTION
  83 extern int filesfrom_convert;
  84 extern iconv_t ic_send, ic_recv;
  85 #endif
  86
  87 #define PTR_SIZE (sizeof (struct file_struct *))
  88
  89 int io_error;
  90 int checksum_len;
  91 dev_t filesystem_dev; /* used to implement -x */
  92
  93 struct file_list *cur_flist, *first_flist, *dir_flist;
  94 int send_dir_ndx = -1, send_dir_depth = -1;
  95 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  96 int file_total = 0; /* total of all active items over all file-lists */
  97 int flist_eof = 0; /* all the file-lists are now known */
  98
  99 #define NORMAL_NAME 0
 100 #define SLASH_ENDING_NAME 1
 101 #define DOTDIR_NAME 2
 102
 103 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 104  * internally, even if this platform does not allow files to have 64-bit inums.
 105  * The only exception is if we're on a platform with no 64-bit type at all.
 106  *
 107  * Because we use read_longint() to get these off the wire, if you transfer
 108  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 109  * machine with no 64-bit types then you will get an overflow error.
 110  *
 111  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 112  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 113  * be truncated.  But it's a kind of silly thing to do anyhow. */
 114
 115 /* The tmp_* vars are used as a cache area by make_file() to store data
 116  * that the sender doesn't need to remember in its file list.  The data
 117  * will survive just long enough to be used by send_file_entry(). */
 118 static dev_t tmp_rdev;
 119 #ifdef SUPPORT_HARD_LINKS
 120 static int64 tmp_dev, tmp_ino;
 121 #endif
 122 static char tmp_sum[MAX_DIGEST_LEN];
 123
 124 static char empty_sum[MAX_DIGEST_LEN];
 125 static int flist_count_offset; /* for --delete --progress */
 126 static int dir_count = 0;
 127
 128 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 129 static void output_flist(struct file_list *flist);
 130
 131 void init_flist(void)
 132 {
 133         if (verbose > 4) {
 134                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 135                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 136         }
 137         checksum_len = protocol_version < 21 ? 2
 138                      : protocol_version < 30 ? MD4_DIGEST_LEN
 139                      : MD5_DIGEST_LEN;
 140 }
 141
 142 static int show_filelist_p(void)
 143 {
 144         return verbose && xfer_dirs && !am_server && !inc_recurse;
 145 }
 146
 147 static void start_filelist_progress(char *kind)
 148 {
 149         rprintf(FCLIENT, "%s ... ", kind);
 150         if (verbose > 1 || do_progress)
 151                 rprintf(FCLIENT, "\n");
 152         rflush(FINFO);
 153 }
 154
 155 static void emit_filelist_progress(int count)
 156 {
 157         rprintf(FCLIENT, " %d files...\r", count);
 158 }
 159
 160 static void maybe_emit_filelist_progress(int count)
 161 {
 162         if (do_progress && show_filelist_p() && (count % 100) == 0)
 163                 emit_filelist_progress(count);
 164 }
 165
 166 static void finish_filelist_progress(const struct file_list *flist)
 167 {
 168         if (do_progress) {
 169                 /* This overwrites the progress line */
 170                 rprintf(FINFO, "%d file%sto consider\n",
 171                         flist->used, flist->used == 1 ? " " : "s ");
 172         } else
 173                 rprintf(FINFO, "done\n");
 174 }
 175
 176 void show_flist_stats(void)
 177 {
 178         /* Nothing yet */
 179 }
 180
 181 /* Stat either a symlink or its referent, depending on the settings of
 182  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 183  *
 184  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 185  * MAXPATHLEN chars) will be set to the symlink's target string.
 186  *
 187  * The stat structure pointed to by stp will contain information about the
 188  * link or the referent as appropriate, if they exist. */
 189 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 190 {
 191 #ifdef SUPPORT_LINKS
 192         if (link_stat(path, stp, copy_dirlinks) < 0)
 193                 return -1;
 194         if (S_ISLNK(stp->st_mode)) {
 195                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 196                 if (llen < 0)
 197                         return -1;
 198                 linkbuf[llen] = '\0';
 199                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 200                         if (verbose > 1) {
 201                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 202                                         path, linkbuf);
 203                         }
 204                         return x_stat(path, stp, NULL);
 205                 }
 206                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 207                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 208                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 209                                 llen - SYMLINK_PREFIX_LEN + 1);
 210                 }
 211         }
 212         return 0;
 213 #else
 214         return x_stat(path, stp, NULL);
 215 #endif
 216 }
 217
 218 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 219 {
 220 #ifdef SUPPORT_LINKS
 221         if (copy_links)
 222                 return x_stat(path, stp, NULL);
 223         if (x_lstat(path, stp, NULL) < 0)
 224                 return -1;
 225         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 226                 STRUCT_STAT st;
 227                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 228                         *stp = st;
 229         }
 230         return 0;
 231 #else
 232         return x_stat(path, stp, NULL);
 233 #endif
 234 }
 235
 236 static inline int is_daemon_excluded(const char *fname, int is_dir)
 237 {
 238         if (daemon_filter_list.head
 239          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 240                 errno = ENOENT;
 241                 return 1;
 242         }
 243         return 0;
 244 }
 245
 246 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 247 {
 248         if (daemon_filter_list.head) {
 249                 char *slash = path;
 250
 251                 while ((slash = strchr(slash+1, '/')) != NULL) {
 252                         int ret;
 253                         *slash = '\0';
 254                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 255                         *slash = '/';
 256                         if (ret < 0) {
 257                                 errno = ENOENT;
 258                                 return 1;
 259                         }
 260                 }
 261
 262                 if (!ignore_filename
 263                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 264                         errno = ENOENT;
 265                         return 1;
 266                 }
 267         }
 268
 269         return 0;
 270 }
 271
 272 /* This function is used to check if a file should be included/excluded
 273  * from the list of files based on its name and type etc.  The value of
 274  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 275 static int is_excluded(const char *fname, int is_dir, int filter_level)
 276 {
 277 #if 0 /* This currently never happens, so avoid a useless compare. */
 278         if (filter_level == NO_FILTERS)
 279                 return 0;
 280 #endif
 281         if (is_daemon_excluded(fname, is_dir))
 282                 return 1;
 283         if (filter_level != ALL_FILTERS)
 284                 return 0;
 285         if (filter_list.head
 286             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 287                 return 1;
 288         return 0;
 289 }
 290
 291 static void send_directory(int f, struct file_list *flist,
 292                            char *fbuf, int len, int flags);
 293
 294 static const char *pathname, *orig_dir;
 295 static int pathname_len;
 296
 297 /* Make sure flist can hold at least flist->used + extra entries. */
 298 static void flist_expand(struct file_list *flist, int extra)
 299 {
 300         struct file_struct **new_ptr;
 301
 302         if (flist->used + extra <= flist->malloced)
 303                 return;
 304
 305         if (flist->malloced < FLIST_START)
 306                 flist->malloced = FLIST_START;
 307         else if (flist->malloced >= FLIST_LINEAR)
 308                 flist->malloced += FLIST_LINEAR;
 309         else
 310                 flist->malloced *= 2;
 311
 312         /* In case count jumped or we are starting the list
 313          * with a known size just set it. */
 314         if (flist->malloced < flist->used + extra)
 315                 flist->malloced = flist->used + extra;
 316
 317         new_ptr = realloc_array(flist->files, struct file_struct *,
 318                                 flist->malloced);
 319
 320         if (verbose >= 2 && flist->malloced != FLIST_START) {
 321                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %.0f bytes, did%s move\n",
 322                     who_am_i(),
 323                     (double)sizeof flist->files[0] * flist->malloced,
 324                     (new_ptr == flist->files) ? " not" : "");
 325         }
 326
 327         flist->files = new_ptr;
 328
 329         if (!flist->files)
 330                 out_of_memory("flist_expand");
 331 }
 332
 333 static void flist_done_allocating(struct file_list *flist)
 334 {
 335         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 336         if (flist->pool_boundary == ptr)
 337                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 338         else
 339                 flist->pool_boundary = ptr;
 340 }
 341
 342 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 343  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 344  * with dir == NULL taken to be the starting directory, and dirlen < 0
 345  * indicating that strdup(dir) should be called and then the -dirlen length
 346  * value checked to ensure that it is not daemon-excluded. */
 347 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 348 {
 349         if (dirlen < 0) {
 350                 char *cpy = strdup(dir);
 351                 if (*cpy != '/')
 352                         change_dir(orig_dir, CD_SKIP_CHDIR);
 353                 if (path_is_daemon_excluded(cpy, 0))
 354                         goto chdir_error;
 355                 dir = cpy;
 356                 dirlen = -dirlen;
 357         } else {
 358                 if (file) {
 359                         if (pathname == F_PATHNAME(file))
 360                                 return 1;
 361                         dir = F_PATHNAME(file);
 362                         if (dir)
 363                                 dirlen = strlen(dir);
 364                 } else if (pathname == dir)
 365                         return 1;
 366                 if (dir && *dir != '/')
 367                         change_dir(orig_dir, CD_SKIP_CHDIR);
 368         }
 369
 370         pathname = dir;
 371         pathname_len = dirlen;
 372
 373         if (!dir)
 374                 dir = orig_dir;
 375
 376         if (!change_dir(dir, CD_NORMAL)) {
 377           chdir_error:
 378                 io_error |= IOERR_GENERAL;
 379                 rsyserr(FERROR_XFER, errno, "change_dir %s failed", full_fname(dir));
 380                 if (dir != orig_dir)
 381                         change_dir(orig_dir, CD_NORMAL);
 382                 pathname = NULL;
 383                 pathname_len = 0;
 384                 return 0;
 385         }
 386
 387         return 1;
 388 }
 389
 390 static void send_file_entry(int f, const char *fname, struct file_struct *file,
 391 #ifdef SUPPORT_LINKS
 392                             const char *symlink_name, int symlink_len,
 393 #endif
 394                             int ndx, int first_ndx)
 395 {
 396         static time_t modtime;
 397         static mode_t mode;
 398 #ifdef SUPPORT_HARD_LINKS
 399         static int64 dev;
 400 #endif
 401         static dev_t rdev;
 402         static uint32 rdev_major;
 403         static uid_t uid;
 404         static gid_t gid;
 405         static const char *user_name, *group_name;
 406         static char lastname[MAXPATHLEN];
 407         int first_hlink_ndx = -1;
 408         int l1, l2;
 409         int xflags;
 410
 411         /* Initialize starting value of xflags. */
 412         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 413                 dir_count++;
 414                 if (file->flags & FLAG_CONTENT_DIR)
 415                         xflags = file->flags & FLAG_TOP_DIR;
 416                 else if (file->flags & FLAG_IMPLIED_DIR)
 417                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 418                 else
 419                         xflags = XMIT_NO_CONTENT_DIR;
 420         } else
 421                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 422
 423         if (file->mode == mode)
 424                 xflags |= XMIT_SAME_MODE;
 425         else
 426                 mode = file->mode;
 427
 428         if ((preserve_devices && IS_DEVICE(mode))
 429          || (preserve_specials && IS_SPECIAL(mode))) {
 430                 if (protocol_version < 28) {
 431                         if (tmp_rdev == rdev)
 432                                 xflags |= XMIT_SAME_RDEV_pre28;
 433                         else
 434                                 rdev = tmp_rdev;
 435                 } else {
 436                         rdev = tmp_rdev;
 437                         if ((uint32)major(rdev) == rdev_major)
 438                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 439                         else
 440                                 rdev_major = major(rdev);
 441                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 442                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 443                 }
 444         } else if (protocol_version < 28)
 445                 rdev = MAKEDEV(0, 0);
 446         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 447                 xflags |= XMIT_SAME_UID;
 448         else {
 449                 uid = F_OWNER(file);
 450                 if (!numeric_ids) {
 451                         user_name = add_uid(uid);
 452                         if (inc_recurse && user_name)
 453                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 454                 }
 455         }
 456         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 457                 xflags |= XMIT_SAME_GID;
 458         else {
 459                 gid = F_GROUP(file);
 460                 if (!numeric_ids) {
 461                         group_name = add_gid(gid);
 462                         if (inc_recurse && group_name)
 463                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 464                 }
 465         }
 466         if (file->modtime == modtime)
 467                 xflags |= XMIT_SAME_TIME;
 468         else
 469                 modtime = file->modtime;
 470
 471 #ifdef SUPPORT_HARD_LINKS
 472         if (tmp_dev != 0) {
 473                 if (protocol_version >= 30) {
 474                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 475                         first_hlink_ndx = (int32)(long)np->data - 1;
 476                         if (first_hlink_ndx < 0) {
 477                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 478                                 xflags |= XMIT_HLINK_FIRST;
 479                         }
 480                 } else {
 481                         if (tmp_dev == dev) {
 482                                 if (protocol_version >= 28)
 483                                         xflags |= XMIT_SAME_DEV_pre30;
 484                         } else
 485                                 dev = tmp_dev;
 486                 }
 487                 xflags |= XMIT_HLINKED;
 488         }
 489 #endif
 490
 491         for (l1 = 0;
 492             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 493             l1++) {}
 494         l2 = strlen(fname+l1);
 495
 496         if (l1 > 0)
 497                 xflags |= XMIT_SAME_NAME;
 498         if (l2 > 255)
 499                 xflags |= XMIT_LONG_NAME;
 500
 501         /* We must make sure we don't send a zero flag byte or the
 502          * other end will terminate the flist transfer.  Note that
 503          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 504          * it's harmless way to add a bit to the first flag byte. */
 505         if (protocol_version >= 28) {
 506                 if (!xflags && !S_ISDIR(mode))
 507                         xflags |= XMIT_TOP_DIR;
 508                 if ((xflags & 0xFF00) || !xflags) {
 509                         xflags |= XMIT_EXTENDED_FLAGS;
 510                         write_shortint(f, xflags);
 511                 } else
 512                         write_byte(f, xflags);
 513         } else {
 514                 if (!(xflags & 0xFF))
 515                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 516                 write_byte(f, xflags);
 517         }
 518         if (xflags & XMIT_SAME_NAME)
 519                 write_byte(f, l1);
 520         if (xflags & XMIT_LONG_NAME)
 521                 write_varint30(f, l2);
 522         else
 523                 write_byte(f, l2);
 524         write_buf(f, fname + l1, l2);
 525
 526         if (first_hlink_ndx >= 0) {
 527                 write_varint(f, first_hlink_ndx);
 528                 if (first_hlink_ndx >= first_ndx)
 529                         goto the_end;
 530         }
 531
 532         write_varlong30(f, F_LENGTH(file), 3);
 533         if (!(xflags & XMIT_SAME_TIME)) {
 534                 if (protocol_version >= 30)
 535                         write_varlong(f, modtime, 4);
 536                 else
 537                         write_int(f, modtime);
 538         }
 539         if (!(xflags & XMIT_SAME_MODE))
 540                 write_int(f, to_wire_mode(mode));
 541         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 542                 if (protocol_version < 30)
 543                         write_int(f, uid);
 544                 else {
 545                         write_varint(f, uid);
 546                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 547                                 int len = strlen(user_name);
 548                                 write_byte(f, len);
 549                                 write_buf(f, user_name, len);
 550                         }
 551                 }
 552         }
 553         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 554                 if (protocol_version < 30)
 555                         write_int(f, gid);
 556                 else {
 557                         write_varint(f, gid);
 558                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 559                                 int len = strlen(group_name);
 560                                 write_byte(f, len);
 561                                 write_buf(f, group_name, len);
 562                         }
 563                 }
 564         }
 565         if ((preserve_devices && IS_DEVICE(mode))
 566          || (preserve_specials && IS_SPECIAL(mode))) {
 567                 if (protocol_version < 28) {
 568                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 569                                 write_int(f, (int)rdev);
 570                 } else {
 571                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 572                                 write_varint30(f, major(rdev));
 573                         if (protocol_version >= 30)
 574                                 write_varint(f, minor(rdev));
 575                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 576                                 write_byte(f, minor(rdev));
 577                         else
 578                                 write_int(f, minor(rdev));
 579                 }
 580         }
 581
 582 #ifdef SUPPORT_LINKS
 583         if (symlink_len) {
 584                 write_varint30(f, symlink_len);
 585                 write_buf(f, symlink_name, symlink_len);
 586         }
 587 #endif
 588
 589 #ifdef SUPPORT_HARD_LINKS
 590         if (tmp_dev != 0 && protocol_version < 30) {
 591                 if (protocol_version < 26) {
 592                         /* 32-bit dev_t and ino_t */
 593                         write_int(f, (int32)dev);
 594                         write_int(f, (int32)tmp_ino);
 595                 } else {
 596                         /* 64-bit dev_t and ino_t */
 597                         if (!(xflags & XMIT_SAME_DEV_pre30))
 598                                 write_longint(f, dev);
 599                         write_longint(f, tmp_ino);
 600                 }
 601         }
 602 #endif
 603
 604         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 605                 const char *sum;
 606                 if (S_ISREG(mode))
 607                         sum = tmp_sum;
 608                 else {
 609                         /* Prior to 28, we sent a useless set of nulls. */
 610                         sum = empty_sum;
 611                 }
 612                 write_buf(f, sum, checksum_len);
 613         }
 614
 615   the_end:
 616         strlcpy(lastname, fname, MAXPATHLEN);
 617
 618         if (S_ISREG(mode) || S_ISLNK(mode))
 619                 stats.total_size += F_LENGTH(file);
 620 }
 621
 622 static struct file_struct *recv_file_entry(struct file_list *flist,
 623                                            int xflags, int f)
 624 {
 625         static int64 modtime;
 626         static mode_t mode;
 627 #ifdef SUPPORT_HARD_LINKS
 628         static int64 dev;
 629 #endif
 630         static dev_t rdev;
 631         static uint32 rdev_major;
 632         static uid_t uid;
 633         static gid_t gid;
 634         static uint16 gid_flags;
 635         static char lastname[MAXPATHLEN], *lastdir;
 636         static int lastdir_depth, lastdir_len = -1;
 637         static unsigned int del_hier_name_len = 0;
 638         static int in_del_hier = 0;
 639         char thisname[MAXPATHLEN];
 640         unsigned int l1 = 0, l2 = 0;
 641         int alloc_len, basename_len, linkname_len;
 642         int extra_len = file_extra_cnt * EXTRA_LEN;
 643         int first_hlink_ndx = -1;
 644         int64 file_length;
 645         const char *basename;
 646         struct file_struct *file;
 647         alloc_pool_t *pool;
 648         char *bp;
 649
 650         if (xflags & XMIT_SAME_NAME)
 651                 l1 = read_byte(f);
 652
 653         if (xflags & XMIT_LONG_NAME)
 654                 l2 = read_varint30(f);
 655         else
 656                 l2 = read_byte(f);
 657
 658         if (l2 >= MAXPATHLEN - l1) {
 659                 rprintf(FERROR,
 660                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 661                         xflags, l1, l2, lastname, who_am_i());
 662                 overflow_exit("recv_file_entry");
 663         }
 664
 665         strlcpy(thisname, lastname, l1 + 1);
 666         read_sbuf(f, &thisname[l1], l2);
 667         thisname[l1 + l2] = 0;
 668
 669         /* Abuse basename_len for a moment... */
 670         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 671
 672 #ifdef ICONV_OPTION
 673         if (ic_recv != (iconv_t)-1) {
 674                 xbuf outbuf, inbuf;
 675
 676                 INIT_CONST_XBUF(outbuf, thisname);
 677                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 678
 679                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 680                         io_error |= IOERR_GENERAL;
 681                         rprintf(FERROR_XFER,
 682                             "[%s] cannot convert filename: %s (%s)\n",
 683                             who_am_i(), lastname, strerror(errno));
 684                         outbuf.len = 0;
 685                 }
 686                 thisname[outbuf.len] = '\0';
 687         }
 688 #endif
 689
 690         if (*thisname)
 691                 clean_fname(thisname, 0);
 692
 693         if (sanitize_paths)
 694                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 695
 696         if ((basename = strrchr(thisname, '/')) != NULL) {
 697                 int len = basename++ - thisname;
 698                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 699                         lastdir = new_array(char, len + 1);
 700                         memcpy(lastdir, thisname, len);
 701                         lastdir[len] = '\0';
 702                         lastdir_len = len;
 703                         lastdir_depth = count_dir_elements(lastdir);
 704                 }
 705         } else
 706                 basename = thisname;
 707         basename_len = strlen(basename) + 1; /* count the '\0' */
 708
 709 #ifdef SUPPORT_HARD_LINKS
 710         if (protocol_version >= 30
 711          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 712                 first_hlink_ndx = read_varint(f);
 713                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 714                         rprintf(FERROR,
 715                                 "hard-link reference out of range: %d (%d)\n",
 716                                 first_hlink_ndx, flist->ndx_start + flist->used);
 717                         exit_cleanup(RERR_PROTOCOL);
 718                 }
 719                 if (first_hlink_ndx >= flist->ndx_start) {
 720                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 721                         file_length = F_LENGTH(first);
 722                         modtime = first->modtime;
 723                         mode = first->mode;
 724                         if (preserve_uid)
 725                                 uid = F_OWNER(first);
 726                         if (preserve_gid)
 727                                 gid = F_GROUP(first);
 728                         if ((preserve_devices && IS_DEVICE(mode))
 729                          || (preserve_specials && IS_SPECIAL(mode))) {
 730                                 uint32 *devp = F_RDEV_P(first);
 731                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 732                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 733                         }
 734                         if (preserve_links && S_ISLNK(mode))
 735                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 736                         else
 737                                 linkname_len = 0;
 738                         goto create_object;
 739                 }
 740         }
 741 #endif
 742
 743         file_length = read_varlong30(f, 3);
 744         if (!(xflags & XMIT_SAME_TIME)) {
 745                 if (protocol_version >= 30) {
 746                         modtime = read_varlong(f, 4);
 747 #if SIZEOF_TIME_T < SIZEOF_INT64
 748                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 749                                 rprintf(FERROR_XFER,
 750                                     "Time value of %s truncated on receiver.\n",
 751                                     lastname);
 752                         }
 753 #endif
 754                 } else
 755                         modtime = read_int(f);
 756         }
 757         if (!(xflags & XMIT_SAME_MODE))
 758                 mode = from_wire_mode(read_int(f));
 759
 760         if (chmod_modes && !S_ISLNK(mode))
 761                 mode = tweak_mode(mode, chmod_modes);
 762
 763         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 764                 if (protocol_version < 30)
 765                         uid = (uid_t)read_int(f);
 766                 else {
 767                         uid = (uid_t)read_varint(f);
 768                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 769                                 uid = recv_user_name(f, uid);
 770                         else if (inc_recurse && am_root && !numeric_ids)
 771                                 uid = match_uid(uid);
 772                 }
 773         }
 774         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 775                 if (protocol_version < 30)
 776                         gid = (gid_t)read_int(f);
 777                 else {
 778                         gid = (gid_t)read_varint(f);
 779                         gid_flags = 0;
 780                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 781                                 gid = recv_group_name(f, gid, &gid_flags);
 782                         else if (inc_recurse && (!am_root || !numeric_ids))
 783                                 gid = match_gid(gid, &gid_flags);
 784                 }
 785         }
 786
 787         if ((preserve_devices && IS_DEVICE(mode))
 788          || (preserve_specials && IS_SPECIAL(mode))) {
 789                 if (protocol_version < 28) {
 790                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 791                                 rdev = (dev_t)read_int(f);
 792                 } else {
 793                         uint32 rdev_minor;
 794                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 795                                 rdev_major = read_varint30(f);
 796                         if (protocol_version >= 30)
 797                                 rdev_minor = read_varint(f);
 798                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 799                                 rdev_minor = read_byte(f);
 800                         else
 801                                 rdev_minor = read_int(f);
 802                         rdev = MAKEDEV(rdev_major, rdev_minor);
 803                 }
 804                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 805                 file_length = 0;
 806         } else if (protocol_version < 28)
 807                 rdev = MAKEDEV(0, 0);
 808
 809 #ifdef SUPPORT_LINKS
 810         if (preserve_links && S_ISLNK(mode)) {
 811                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 812                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 813                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 814                                 linkname_len - 1);
 815                         overflow_exit("recv_file_entry");
 816                 }
 817 #ifdef ICONV_OPTION
 818                 /* We don't know how much extra room we need to convert
 819                  * the as-yet-unread symlink name when converting it,
 820                  * so let's hope that a double-size buffer is plenty. */
 821                 if (sender_symlink_iconv)
 822                         linkname_len = linkname_len * 2 + 1;
 823 #endif
 824                 if (munge_symlinks)
 825                         linkname_len += SYMLINK_PREFIX_LEN;
 826         }
 827         else
 828 #endif
 829                 linkname_len = 0;
 830
 831 #ifdef SUPPORT_HARD_LINKS
 832   create_object:
 833         if (preserve_hard_links) {
 834                 if (protocol_version < 28 && S_ISREG(mode))
 835                         xflags |= XMIT_HLINKED;
 836                 if (xflags & XMIT_HLINKED)
 837                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 838         }
 839 #endif
 840
 841 #ifdef SUPPORT_ACLS
 842         /* Directories need an extra int32 for the default ACL. */
 843         if (preserve_acls && S_ISDIR(mode))
 844                 extra_len += EXTRA_LEN;
 845 #endif
 846
 847         if (always_checksum && S_ISREG(mode))
 848                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 849
 850 #if SIZEOF_INT64 >= 8
 851         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 852                 extra_len += EXTRA_LEN;
 853 #endif
 854         if (file_length < 0) {
 855                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 856                 exit_cleanup(RERR_UNSUPPORTED);
 857         }
 858
 859         if (inc_recurse && S_ISDIR(mode)) {
 860                 if (one_file_system) {
 861                         /* Room to save the dir's device for -x */
 862                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 863                 }
 864                 pool = dir_flist->file_pool;
 865         } else
 866                 pool = flist->file_pool;
 867
 868 #if EXTRA_ROUNDING > 0
 869         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 870                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 871 #endif
 872
 873         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 874                   + linkname_len;
 875         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 876
 877         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 878         bp += extra_len;
 879         file = (struct file_struct *)bp;
 880         bp += FILE_STRUCT_LEN;
 881
 882         memcpy(bp, basename, basename_len);
 883
 884 #ifdef SUPPORT_HARD_LINKS
 885         if (xflags & XMIT_HLINKED)
 886                 file->flags |= FLAG_HLINKED;
 887 #endif
 888         file->modtime = (time_t)modtime;
 889         file->len32 = (uint32)file_length;
 890 #if SIZEOF_INT64 >= 8
 891         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 892 #if SIZEOF_CAPITAL_OFF_T < 8
 893                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 894                 exit_cleanup(RERR_UNSUPPORTED);
 895 #else
 896                 file->flags |= FLAG_LENGTH64;
 897                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 898 #endif
 899         }
 900 #endif
 901         file->mode = mode;
 902         if (preserve_uid)
 903                 F_OWNER(file) = uid;
 904         if (preserve_gid) {
 905                 F_GROUP(file) = gid;
 906                 file->flags |= gid_flags;
 907         }
 908         if (unsort_ndx)
 909                 F_NDX(file) = flist->used + flist->ndx_start;
 910
 911         if (basename != thisname) {
 912                 file->dirname = lastdir;
 913                 F_DEPTH(file) = lastdir_depth + 1;
 914         } else
 915                 F_DEPTH(file) = 1;
 916
 917         if (S_ISDIR(mode)) {
 918                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 919                         F_DEPTH(file)--;
 920                 if (protocol_version >= 30) {
 921                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 922                                 if (xflags & XMIT_TOP_DIR)
 923                                         file->flags |= FLAG_TOP_DIR;
 924                                 file->flags |= FLAG_CONTENT_DIR;
 925                         } else if (xflags & XMIT_TOP_DIR)
 926                                 file->flags |= FLAG_IMPLIED_DIR;
 927                 } else if (xflags & XMIT_TOP_DIR) {
 928                         in_del_hier = recurse;
 929                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 930                         if (relative_paths && del_hier_name_len > 2
 931                             && lastname[del_hier_name_len-1] == '.'
 932                             && lastname[del_hier_name_len-2] == '/')
 933                                 del_hier_name_len -= 2;
 934                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 935                 } else if (in_del_hier) {
 936                         if (!relative_paths || !del_hier_name_len
 937                          || (l1 >= del_hier_name_len
 938                           && lastname[del_hier_name_len] == '/'))
 939                                 file->flags |= FLAG_CONTENT_DIR;
 940                         else
 941                                 in_del_hier = 0;
 942                 }
 943         }
 944
 945         if ((preserve_devices && IS_DEVICE(mode))
 946          || (preserve_specials && IS_SPECIAL(mode))) {
 947                 uint32 *devp = F_RDEV_P(file);
 948                 DEV_MAJOR(devp) = major(rdev);
 949                 DEV_MINOR(devp) = minor(rdev);
 950         }
 951
 952 #ifdef SUPPORT_LINKS
 953         if (linkname_len) {
 954                 bp += basename_len;
 955                 if (first_hlink_ndx >= flist->ndx_start) {
 956                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 957                         memcpy(bp, F_SYMLINK(first), linkname_len);
 958                 } else {
 959                         if (munge_symlinks) {
 960                                 strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 961                                 bp += SYMLINK_PREFIX_LEN;
 962                                 linkname_len -= SYMLINK_PREFIX_LEN;
 963                         }
 964 #ifdef ICONV_OPTION
 965                         if (sender_symlink_iconv) {
 966                                 xbuf outbuf, inbuf;
 967
 968                                 alloc_len = linkname_len;
 969                                 linkname_len /= 2; /* (linkname_len-1) / 2 for odd values. */
 970
 971                                 /* Read the symlink name into the end of our double-sized
 972                                  * buffer and then convert it into the right spot. */
 973                                 INIT_XBUF(inbuf, bp + alloc_len - linkname_len,
 974                                           linkname_len - 1, (size_t)-1);
 975                                 read_sbuf(f, inbuf.buf, inbuf.len);
 976                                 INIT_XBUF(outbuf, bp, 0, alloc_len);
 977
 978                                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 979                                         io_error |= IOERR_GENERAL;
 980                                         rprintf(FERROR_XFER,
 981                                             "[%s] cannot convert symlink name for: %s (%s)\n",
 982                                             who_am_i(), full_fname(thisname), strerror(errno));
 983                                         bp = (char*)file->basename;
 984                                         *bp++ = '\0';
 985                                         outbuf.len = 0;
 986                                 }
 987                                 bp[outbuf.len] = '\0';
 988                         } else
 989 #endif
 990                                 read_sbuf(f, bp, linkname_len - 1);
 991                         if (sanitize_paths && !munge_symlinks && *bp)
 992                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
 993                 }
 994         }
 995 #endif
 996
 997 #ifdef SUPPORT_HARD_LINKS
 998         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 999                 if (protocol_version >= 30) {
1000                         if (xflags & XMIT_HLINK_FIRST) {
1001                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
1002                         } else
1003                                 F_HL_GNUM(file) = first_hlink_ndx;
1004                 } else {
1005                         static int32 cnt = 0;
1006                         struct ht_int64_node *np;
1007                         int64 ino;
1008                         int32 ndx;
1009                         if (protocol_version < 26) {
1010                                 dev = read_int(f);
1011                                 ino = read_int(f);
1012                         } else {
1013                                 if (!(xflags & XMIT_SAME_DEV_pre30))
1014                                         dev = read_longint(f);
1015                                 ino = read_longint(f);
1016                         }
1017                         np = idev_find(dev, ino);
1018                         ndx = (int32)(long)np->data - 1;
1019                         if (ndx < 0) {
1020                                 ndx = cnt++;
1021                                 np->data = (void*)(long)cnt;
1022                         }
1023                         F_HL_GNUM(file) = ndx;
1024                 }
1025         }
1026 #endif
1027
1028         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1029                 if (S_ISREG(mode))
1030                         bp = F_SUM(file);
1031                 else {
1032                         /* Prior to 28, we get a useless set of nulls. */
1033                         bp = tmp_sum;
1034                 }
1035                 if (first_hlink_ndx >= flist->ndx_start) {
1036                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1037                         memcpy(bp, F_SUM(first), checksum_len);
1038                 } else
1039                         read_buf(f, bp, checksum_len);
1040         }
1041
1042 #ifdef SUPPORT_ACLS
1043         if (preserve_acls && !S_ISLNK(mode))
1044                 receive_acl(file, f);
1045 #endif
1046 #ifdef SUPPORT_XATTRS
1047         if (preserve_xattrs)
1048                 receive_xattr(file, f );
1049 #endif
1050
1051         if (S_ISREG(mode) || S_ISLNK(mode))
1052                 stats.total_size += file_length;
1053
1054         return file;
1055 }
1056
1057 /* Create a file_struct for a named file by reading its stat() information
1058  * and performing extensive checks against global options.
1059  *
1060  * Returns a pointer to the new file struct, or NULL if there was an error
1061  * or this file should be excluded.
1062  *
1063  * Note: Any error (here or in send_file_name) that results in the omission of
1064  * an existent source file from the file list should set
1065  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1066  * destination if --delete is on. */
1067 struct file_struct *make_file(const char *fname, struct file_list *flist,
1068                               STRUCT_STAT *stp, int flags, int filter_level)
1069 {
1070         static char *lastdir;
1071         static int lastdir_len = -1;
1072         struct file_struct *file;
1073         char thisname[MAXPATHLEN];
1074         char linkname[MAXPATHLEN];
1075         int alloc_len, basename_len, linkname_len;
1076         int extra_len = file_extra_cnt * EXTRA_LEN;
1077         const char *basename;
1078         alloc_pool_t *pool;
1079         STRUCT_STAT st;
1080         char *bp;
1081
1082         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1083                 io_error |= IOERR_GENERAL;
1084                 rprintf(FERROR_XFER, "skipping overly long name: %s\n", fname);
1085                 return NULL;
1086         }
1087         clean_fname(thisname, 0);
1088         if (sanitize_paths)
1089                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1090
1091         if (stp && S_ISDIR(stp->st_mode)) {
1092                 st = *stp; /* Needed for "symlink/." with --relative. */
1093                 *linkname = '\0'; /* make IBM code checker happy */
1094         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1095                 int save_errno = errno;
1096                 /* See if file is excluded before reporting an error. */
1097                 if (filter_level != NO_FILTERS
1098                  && (is_excluded(thisname, 0, filter_level)
1099                   || is_excluded(thisname, 1, filter_level))) {
1100                         if (ignore_perishable && save_errno != ENOENT)
1101                                 non_perishable_cnt++;
1102                         return NULL;
1103                 }
1104                 if (save_errno == ENOENT) {
1105 #ifdef SUPPORT_LINKS
1106                         /* When our options tell us to follow a symlink that
1107                          * points nowhere, tell the user about the symlink
1108                          * instead of giving a "vanished" message.  We only
1109                          * dereference a symlink if one of the --copy*links
1110                          * options was specified, so there's no need for the
1111                          * extra lstat() if one of these options isn't on. */
1112                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1113                          && x_lstat(thisname, &st, NULL) == 0
1114                          && S_ISLNK(st.st_mode)) {
1115                                 io_error |= IOERR_GENERAL;
1116                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1117                                         full_fname(thisname));
1118                         } else
1119 #endif
1120                         {
1121                                 enum logcode c = am_daemon && protocol_version < 28
1122                                                ? FERROR : FWARNING;
1123                                 io_error |= IOERR_VANISHED;
1124                                 rprintf(c, "file has vanished: %s\n",
1125                                         full_fname(thisname));
1126                         }
1127                 } else {
1128                         io_error |= IOERR_GENERAL;
1129                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1130                                 full_fname(thisname));
1131                 }
1132                 return NULL;
1133         }
1134
1135         if (filter_level == NO_FILTERS)
1136                 goto skip_filters;
1137
1138         if (S_ISDIR(st.st_mode)) {
1139                 if (!xfer_dirs) {
1140                         rprintf(FINFO, "skipping directory %s\n", thisname);
1141                         return NULL;
1142                 }
1143                 /* -x only affects dirs because we need to avoid recursing
1144                  * into a mount-point directory, not to avoid copying a
1145                  * symlinked file if -L (or similar) was specified. */
1146                 if (one_file_system && st.st_dev != filesystem_dev
1147                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1148                         if (one_file_system > 1) {
1149                                 if (verbose > 1) {
1150                                         rprintf(FINFO,
1151                                             "[%s] skipping mount-point dir %s\n",
1152                                             who_am_i(), thisname);
1153                                 }
1154                                 return NULL;
1155                         }
1156                         flags |= FLAG_MOUNT_DIR;
1157                         flags &= ~FLAG_CONTENT_DIR;
1158                 }
1159         } else
1160                 flags &= ~FLAG_CONTENT_DIR;
1161
1162         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1163                 if (ignore_perishable)
1164                         non_perishable_cnt++;
1165                 return NULL;
1166         }
1167
1168         if (lp_ignore_nonreadable(module_id)) {
1169 #ifdef SUPPORT_LINKS
1170                 if (!S_ISLNK(st.st_mode))
1171 #endif
1172                         if (access(thisname, R_OK) != 0)
1173                                 return NULL;
1174         }
1175
1176   skip_filters:
1177
1178         /* Only divert a directory in the main transfer. */
1179         if (flist) {
1180                 if (flist->prev && S_ISDIR(st.st_mode)
1181                  && flags & FLAG_DIVERT_DIRS) {
1182                         /* Room for parent/sibling/next-child info. */
1183                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1184                         if (relative_paths)
1185                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1186                         pool = dir_flist->file_pool;
1187                 } else
1188                         pool = flist->file_pool;
1189         } else {
1190 #ifdef SUPPORT_ACLS
1191                 /* Directories need an extra int32 for the default ACL. */
1192                 if (preserve_acls && S_ISDIR(st.st_mode))
1193                         extra_len += EXTRA_LEN;
1194 #endif
1195                 pool = NULL;
1196         }
1197
1198         if (verbose > 2) {
1199                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1200                         who_am_i(), thisname, filter_level);
1201         }
1202
1203         if ((basename = strrchr(thisname, '/')) != NULL) {
1204                 int len = basename++ - thisname;
1205                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1206                         lastdir = new_array(char, len + 1);
1207                         memcpy(lastdir, thisname, len);
1208                         lastdir[len] = '\0';
1209                         lastdir_len = len;
1210                 }
1211         } else
1212                 basename = thisname;
1213         basename_len = strlen(basename) + 1; /* count the '\0' */
1214
1215 #ifdef SUPPORT_LINKS
1216         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1217 #else
1218         linkname_len = 0;
1219 #endif
1220
1221 #if SIZEOF_CAPITAL_OFF_T >= 8
1222         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1223                 extra_len += EXTRA_LEN;
1224 #endif
1225
1226 #if EXTRA_ROUNDING > 0
1227         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1228                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1229 #endif
1230
1231         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1232                   + linkname_len;
1233         if (pool)
1234                 bp = pool_alloc(pool, alloc_len, "make_file");
1235         else {
1236                 if (!(bp = new_array(char, alloc_len)))
1237                         out_of_memory("make_file");
1238         }
1239
1240         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1241         bp += extra_len;
1242         file = (struct file_struct *)bp;
1243         bp += FILE_STRUCT_LEN;
1244
1245         memcpy(bp, basename, basename_len);
1246
1247 #ifdef SUPPORT_HARD_LINKS
1248         if (preserve_hard_links && flist && flist->prev) {
1249                 if (protocol_version >= 28
1250                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1251                  : S_ISREG(st.st_mode)) {
1252                         tmp_dev = (int64)st.st_dev + 1;
1253                         tmp_ino = (int64)st.st_ino;
1254                 } else
1255                         tmp_dev = 0;
1256         }
1257 #endif
1258
1259 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1260         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1261                 tmp_rdev = st.st_rdev;
1262                 st.st_size = 0;
1263         }
1264 #endif
1265
1266         file->flags = flags;
1267         file->modtime = st.st_mtime;
1268         file->len32 = (uint32)st.st_size;
1269 #if SIZEOF_CAPITAL_OFF_T >= 8
1270         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1271                 file->flags |= FLAG_LENGTH64;
1272                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1273         }
1274 #endif
1275         file->mode = st.st_mode;
1276         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1277                 F_OWNER(file) = st.st_uid;
1278         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1279                 F_GROUP(file) = st.st_gid;
1280
1281         if (basename != thisname)
1282                 file->dirname = lastdir;
1283
1284 #ifdef SUPPORT_LINKS
1285         if (linkname_len)
1286                 memcpy(bp + basename_len, linkname, linkname_len);
1287 #endif
1288
1289         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1290                 file_checksum(thisname, tmp_sum, st.st_size);
1291
1292         if (am_sender)
1293                 F_PATHNAME(file) = pathname;
1294         else if (!pool)
1295                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1296
1297         /* This code is only used by the receiver when it is building
1298          * a list of files for a delete pass. */
1299         if (keep_dirlinks && linkname_len && flist) {
1300                 STRUCT_STAT st2;
1301                 int save_mode = file->mode;
1302                 file->mode = S_IFDIR; /* Find a directory with our name. */
1303                 if (flist_find(dir_flist, file) >= 0
1304                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1305                         file->modtime = st2.st_mtime;
1306                         file->len32 = 0;
1307                         file->mode = st2.st_mode;
1308                         if (uid_ndx)
1309                                 F_OWNER(file) = st2.st_uid;
1310                         if (gid_ndx)
1311                                 F_GROUP(file) = st2.st_gid;
1312                 } else
1313                         file->mode = save_mode;
1314         }
1315
1316         if (basename_len == 0+1) {
1317                 if (!pool)
1318                         unmake_file(file);
1319                 return NULL;
1320         }
1321
1322         if (unsort_ndx)
1323                 F_NDX(file) = dir_count;
1324
1325         return file;
1326 }
1327
1328 /* Only called for temporary file_struct entries created by make_file(). */
1329 void unmake_file(struct file_struct *file)
1330 {
1331         free(REQ_EXTRA(file, F_DEPTH(file)));
1332 }
1333
1334 static struct file_struct *send_file_name(int f, struct file_list *flist,
1335                                           const char *fname, STRUCT_STAT *stp,
1336                                           int flags, int filter_level)
1337 {
1338         struct file_struct *file;
1339
1340         file = make_file(fname, flist, stp, flags, filter_level);
1341         if (!file)
1342                 return NULL;
1343
1344         if (chmod_modes && !S_ISLNK(file->mode))
1345                 file->mode = tweak_mode(file->mode, chmod_modes);
1346
1347         if (f >= 0) {
1348                 char fbuf[MAXPATHLEN];
1349 #ifdef SUPPORT_LINKS
1350                 const char *symlink_name;
1351                 int symlink_len;
1352 #ifdef ICONV_OPTION
1353                 char symlink_buf[MAXPATHLEN];
1354 #endif
1355 #endif
1356 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1357                 stat_x sx;
1358 #endif
1359
1360 #ifdef SUPPORT_LINKS
1361                 if (preserve_links && S_ISLNK(file->mode)) {
1362                         symlink_name = F_SYMLINK(file);
1363                         symlink_len = strlen(symlink_name);
1364                 } else {
1365                         symlink_name = NULL;
1366                         symlink_len = 0;
1367                 }
1368 #endif
1369
1370 #ifdef ICONV_OPTION
1371                 if (ic_send != (iconv_t)-1) {
1372                         xbuf outbuf, inbuf;
1373
1374                         INIT_CONST_XBUF(outbuf, fbuf);
1375
1376                         if (file->dirname) {
1377                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1378                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1379                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1380                                         goto convert_error;
1381                                 outbuf.size += 2;
1382                                 fbuf[outbuf.len++] = '/';
1383                         }
1384
1385                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1386                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1387                           convert_error:
1388                                 io_error |= IOERR_GENERAL;
1389                                 rprintf(FERROR_XFER,
1390                                     "[%s] cannot convert filename: %s (%s)\n",
1391                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1392                                 return NULL;
1393                         }
1394                         fbuf[outbuf.len] = '\0';
1395
1396 #ifdef SUPPORT_LINKS
1397                         if (symlink_len && sender_symlink_iconv) {
1398                                 INIT_XBUF(inbuf, (char*)symlink_name, symlink_len, (size_t)-1);
1399                                 INIT_CONST_XBUF(outbuf, symlink_buf);
1400                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1401                                         io_error |= IOERR_GENERAL;
1402                                         f_name(file, fbuf);
1403                                         rprintf(FERROR_XFER,
1404                                             "[%s] cannot convert symlink name for: %s (%s)\n",
1405                                             who_am_i(), full_fname(fbuf), strerror(errno));
1406                                         return NULL;
1407                                 }
1408                                 symlink_buf[outbuf.len] = '\0';
1409
1410                                 symlink_name = symlink_buf;
1411                                 symlink_len = outbuf.len;
1412                         }
1413 #endif
1414                 } else
1415 #endif
1416                         f_name(file, fbuf);
1417
1418 #ifdef SUPPORT_ACLS
1419                 if (preserve_acls && !S_ISLNK(file->mode)) {
1420                         sx.st.st_mode = file->mode;
1421                         sx.acc_acl = sx.def_acl = NULL;
1422                         if (get_acl(fname, &sx) < 0) {
1423                                 io_error |= IOERR_GENERAL;
1424                                 return NULL;
1425                         }
1426                 }
1427 #endif
1428 #ifdef SUPPORT_XATTRS
1429                 if (preserve_xattrs) {
1430                         sx.xattr = NULL;
1431                         if (get_xattr(fname, &sx) < 0) {
1432                                 io_error |= IOERR_GENERAL;
1433                                 return NULL;
1434                         }
1435                 }
1436 #endif
1437
1438                 send_file_entry(f, fbuf, file,
1439 #ifdef SUPPORT_LINKS
1440                                 symlink_name, symlink_len,
1441 #endif
1442                                 flist->used, flist->ndx_start);
1443
1444 #ifdef SUPPORT_ACLS
1445                 if (preserve_acls && !S_ISLNK(file->mode)) {
1446                         send_acl(&sx, f);
1447                         free_acl(&sx);
1448                 }
1449 #endif
1450 #ifdef SUPPORT_XATTRS
1451                 if (preserve_xattrs) {
1452                         F_XATTR(file) = send_xattr(&sx, f);
1453                         free_xattr(&sx);
1454                 }
1455 #endif
1456         }
1457
1458         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1459
1460         flist_expand(flist, 1);
1461         flist->files[flist->used++] = file;
1462
1463         return file;
1464 }
1465
1466 static void send_if_directory(int f, struct file_list *flist,
1467                               struct file_struct *file,
1468                               char *fbuf, unsigned int ol,
1469                               int flags)
1470 {
1471         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1472
1473         if (S_ISDIR(file->mode)
1474             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1475                 void *save_filters;
1476                 unsigned int len = strlen(fbuf);
1477                 if (len > 1 && fbuf[len-1] == '/')
1478                         fbuf[--len] = '\0';
1479                 if (len >= MAXPATHLEN - 1) {
1480                         io_error |= IOERR_GENERAL;
1481                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1482                                 full_fname(fbuf));
1483                         return;
1484                 }
1485                 save_filters = push_local_filters(fbuf, len);
1486                 send_directory(f, flist, fbuf, len, flags);
1487                 pop_local_filters(save_filters);
1488                 fbuf[ol] = '\0';
1489                 if (is_dot_dir)
1490                         fbuf[ol-1] = '.';
1491         }
1492 }
1493
1494 static int file_compare(const void *file1, const void *file2)
1495 {
1496         return f_name_cmp(*(struct file_struct **)file1,
1497                           *(struct file_struct **)file2);
1498 }
1499
1500 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1501  * version, but I (Wayne) changed the merge code to do less copying and
1502  * to require only half the amount of temporary memory. */
1503 static void fsort_tmp(struct file_struct **fp, size_t num,
1504                       struct file_struct **tmp)
1505 {
1506         struct file_struct **f1, **f2, **t;
1507         size_t n1, n2;
1508
1509         n1 = num / 2;
1510         n2 = num - n1;
1511         f1 = fp;
1512         f2 = fp + n1;
1513
1514         if (n1 > 1)
1515                 fsort_tmp(f1, n1, tmp);
1516         if (n2 > 1)
1517                 fsort_tmp(f2, n2, tmp);
1518
1519         while (f_name_cmp(*f1, *f2) <= 0) {
1520                 if (!--n1)
1521                         return;
1522                 f1++;
1523         }
1524
1525         t = tmp;
1526         memcpy(t, f1, n1 * PTR_SIZE);
1527
1528         *f1++ = *f2++, n2--;
1529
1530         while (n1 > 0 && n2 > 0) {
1531                 if (f_name_cmp(*t, *f2) <= 0)
1532                         *f1++ = *t++, n1--;
1533                 else
1534                         *f1++ = *f2++, n2--;
1535         }
1536
1537         if (n1 > 0)
1538                 memcpy(f1, t, n1 * PTR_SIZE);
1539 }
1540
1541 /* This file-struct sorting routine makes sure that any identical names in
1542  * the file list stay in the same order as they were in the original list.
1543  * This is particularly vital in inc_recurse mode where we expect a sort
1544  * on the flist to match the exact order of a sort on the dir_flist. */
1545 static void fsort(struct file_struct **fp, size_t num)
1546 {
1547         if (num <= 1)
1548                 return;
1549
1550         if (use_qsort)
1551                 qsort(fp, num, PTR_SIZE, file_compare);
1552         else {
1553                 struct file_struct **tmp = new_array(struct file_struct *,
1554                                                      (num+1) / 2);
1555                 fsort_tmp(fp, num, tmp);
1556                 free(tmp);
1557         }
1558 }
1559
1560 /* We take an entire set of sibling dirs from the sorted flist and link them
1561  * into the tree, setting the appropriate parent/child/sibling pointers. */
1562 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1563                              int dir_cnt)
1564 {
1565         int i;
1566         int32 *dp = NULL;
1567         int32 *parent_dp = parent_ndx < 0 ? NULL
1568                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1569
1570         flist_expand(dir_flist, dir_cnt);
1571         dir_flist->sorted = dir_flist->files;
1572
1573         for (i = 0; dir_cnt; i++) {
1574                 struct file_struct *file = from_flist->sorted[i];
1575
1576                 if (!S_ISDIR(file->mode))
1577                         continue;
1578
1579                 dir_flist->files[dir_flist->used++] = file;
1580                 dir_cnt--;
1581
1582                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1583                         continue;
1584
1585                 if (dp)
1586                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1587                 else if (parent_dp)
1588                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1589                 else
1590                         send_dir_ndx = dir_flist->used - 1;
1591
1592                 dp = F_DIR_NODE_P(file);
1593                 DIR_PARENT(dp) = parent_ndx;
1594                 DIR_FIRST_CHILD(dp) = -1;
1595         }
1596         if (dp)
1597                 DIR_NEXT_SIBLING(dp) = -1;
1598 }
1599
1600 /* This function is normally called by the sender, but the receiving side also
1601  * calls it from get_dirlist() with f set to -1 so that we just construct the
1602  * file list in memory without sending it over the wire.  Also, get_dirlist()
1603  * might call this with f set to -2, which also indicates that local filter
1604  * rules should be ignored. */
1605 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1606                            int flags)
1607 {
1608         struct dirent *di;
1609         unsigned remainder;
1610         char *p;
1611         DIR *d;
1612         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1613         int start = flist->used;
1614         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1615
1616         assert(flist != NULL);
1617
1618         if (!(d = opendir(fbuf))) {
1619                 io_error |= IOERR_GENERAL;
1620                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1621                 return;
1622         }
1623
1624         p = fbuf + len;
1625         if (len != 1 || *fbuf != '/')
1626                 *p++ = '/';
1627         *p = '\0';
1628         remainder = MAXPATHLEN - (p - fbuf);
1629
1630         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1631                 char *dname = d_name(di);
1632                 if (dname[0] == '.' && (dname[1] == '\0'
1633                     || (dname[1] == '.' && dname[2] == '\0')))
1634                         continue;
1635                 if (strlcpy(p, dname, remainder) >= remainder) {
1636                         io_error |= IOERR_GENERAL;
1637                         rprintf(FERROR_XFER,
1638                                 "cannot send long-named file %s\n",
1639                                 full_fname(fbuf));
1640                         continue;
1641                 }
1642                 if (dname[0] == '\0') {
1643                         io_error |= IOERR_GENERAL;
1644                         rprintf(FERROR_XFER,
1645                                 "cannot send file with empty name in %s\n",
1646                                 full_fname(fbuf));
1647                         continue;
1648                 }
1649
1650                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1651         }
1652
1653         fbuf[len] = '\0';
1654
1655         if (errno) {
1656                 io_error |= IOERR_GENERAL;
1657                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1658         }
1659
1660         closedir(d);
1661
1662         if (f >= 0 && recurse && !divert_dirs) {
1663                 int i, end = flist->used - 1;
1664                 /* send_if_directory() bumps flist->used, so use "end". */
1665                 for (i = start; i <= end; i++)
1666                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1667         }
1668 }
1669
1670 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1671                               char *start, char *limit, int flags, char name_type)
1672 {
1673         static char lastpath[MAXPATHLEN] = "";
1674         static int lastpath_len = 0;
1675         static struct file_struct *lastpath_struct = NULL;
1676         struct file_struct *file;
1677         item_list *relname_list;
1678         relnamecache **rnpp;
1679         int len, need_new_dir, depth = 0;
1680         struct filter_list_struct save_filter_list = filter_list;
1681
1682         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1683         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1684
1685         if (inc_recurse) {
1686                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1687                  && lastpath_len == limit - fname
1688                  && strncmp(lastpath, fname, lastpath_len) == 0)
1689                         need_new_dir = 0;
1690                 else
1691                         need_new_dir = 1;
1692         } else {
1693                 char *tp = fname, *lp = lastpath;
1694                 /* Skip any initial directories in our path that we
1695                  * have in common with lastpath. */
1696                 assert(start == fname);
1697                 for ( ; ; tp++, lp++) {
1698                         if (tp == limit) {
1699                                 if (*lp == '/' || *lp == '\0')
1700                                         goto done;
1701                                 break;
1702                         }
1703                         if (*lp != *tp)
1704                                 break;
1705                         if (*tp == '/') {
1706                                 start = tp;
1707                                 depth++;
1708                         }
1709                 }
1710                 need_new_dir = 1;
1711         }
1712
1713         if (need_new_dir) {
1714                 int save_copy_links = copy_links;
1715                 int save_xfer_dirs = xfer_dirs;
1716                 char *slash;
1717
1718                 copy_links = xfer_dirs = 1;
1719
1720                 *limit = '\0';
1721
1722                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1723                         *slash = '\0';
1724                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1725                         depth++;
1726                         if (!inc_recurse && file && S_ISDIR(file->mode))
1727                                 change_local_filter_dir(fname, strlen(fname), depth);
1728                         *slash = '/';
1729                 }
1730
1731                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1732                 if (inc_recurse) {
1733                         if (file && !S_ISDIR(file->mode))
1734                                 file = NULL;
1735                         lastpath_struct = file;
1736                 } else if (file && S_ISDIR(file->mode))
1737                         change_local_filter_dir(fname, strlen(fname), ++depth);
1738
1739                 strlcpy(lastpath, fname, sizeof lastpath);
1740                 lastpath_len = limit - fname;
1741
1742                 *limit = '/';
1743
1744                 copy_links = save_copy_links;
1745                 xfer_dirs = save_xfer_dirs;
1746
1747                 if (!inc_recurse)
1748                         goto done;
1749         }
1750
1751         if (!lastpath_struct)
1752                 goto done; /* dir must have vanished */
1753
1754         len = strlen(limit+1);
1755         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1756         if (!relname_list) {
1757                 if (!(relname_list = new0(item_list)))
1758                         out_of_memory("send_implied_dirs");
1759                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1760         }
1761         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1762         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1763                 out_of_memory("send_implied_dirs");
1764         (*rnpp)->name_type = name_type;
1765         strlcpy((*rnpp)->fname, limit+1, len + 1);
1766
1767 done:
1768         filter_list = save_filter_list;
1769 }
1770
1771 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1772 {
1773         char fbuf[MAXPATHLEN];
1774         item_list *relname_list;
1775         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1776         size_t j;
1777
1778         f_name(file, fbuf);
1779         dlen = strlen(fbuf);
1780
1781         if (!change_pathname(file, NULL, 0))
1782                 exit_cleanup(RERR_FILESELECT);
1783
1784         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1785
1786         if (file->flags & FLAG_CONTENT_DIR) {
1787                 if (one_file_system) {
1788                         STRUCT_STAT st;
1789                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1790                                 io_error |= IOERR_GENERAL;
1791                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1792                                         full_fname(fbuf));
1793                                 return;
1794                         }
1795                         filesystem_dev = st.st_dev;
1796                 }
1797                 send_directory(f, flist, fbuf, dlen, flags);
1798         }
1799
1800         if (!relative_paths)
1801                 return;
1802
1803         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1804         if (!relname_list)
1805                 return;
1806
1807         for (j = 0; j < relname_list->count; j++) {
1808                 char *slash;
1809                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1810                 char name_type = rnp->name_type;
1811
1812                 fbuf[dlen] = '/';
1813                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1814                 free(rnp);
1815                 if (len >= (int)sizeof fbuf)
1816                         continue; /* Impossible... */
1817
1818                 slash = strchr(fbuf+dlen+1, '/');
1819                 if (slash) {
1820                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1821                         continue;
1822                 }
1823
1824                 if (name_type != NORMAL_NAME) {
1825                         STRUCT_STAT st;
1826                         if (link_stat(fbuf, &st, 1) != 0) {
1827                                 io_error |= IOERR_GENERAL;
1828                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1829                                         full_fname(fbuf));
1830                                 continue;
1831                         }
1832                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1833                 } else
1834                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1835         }
1836
1837         free(relname_list);
1838 }
1839
1840 void send_extra_file_list(int f, int at_least)
1841 {
1842         struct file_list *flist;
1843         int64 start_write;
1844         uint16 prev_flags;
1845         int old_cnt, save_io_error = io_error;
1846
1847         if (flist_eof)
1848                 return;
1849
1850         /* Keep sending data until we have the requested number of
1851          * files in the upcoming file-lists. */
1852         old_cnt = cur_flist->used;
1853         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1854                 old_cnt += flist->used;
1855         while (file_total - old_cnt < at_least) {
1856                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1857                 int dir_ndx, dstart = dir_count;
1858                 const char *pathname = F_PATHNAME(file);
1859                 int32 *dp;
1860
1861                 flist = flist_new(0, "send_extra_file_list");
1862                 start_write = stats.total_written;
1863
1864                 if (unsort_ndx)
1865                         dir_ndx = F_NDX(file);
1866                 else
1867                         dir_ndx = send_dir_ndx;
1868                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1869                 flist->parent_ndx = dir_ndx;
1870
1871                 send1extra(f, file, flist);
1872                 prev_flags = file->flags;
1873                 dp = F_DIR_NODE_P(file);
1874
1875                 /* If there are any duplicate directory names that follow, we
1876                  * send all the dirs together in one file-list.  The dir_flist
1877                  * tree links all the child subdirs onto the last dup dir. */
1878                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1879                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1880                         send_dir_ndx = dir_ndx;
1881                         file = dir_flist->sorted[dir_ndx];
1882                         /* Try to avoid some duplicate scanning of identical dirs. */
1883                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1884                                 file->flags &= ~FLAG_CONTENT_DIR;
1885                         send1extra(f, file, flist);
1886                         prev_flags = file->flags;
1887                         dp = F_DIR_NODE_P(file);
1888                 }
1889
1890                 write_byte(f, 0);
1891
1892                 if (need_unsorted_flist) {
1893                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1894                                 out_of_memory("send_extra_file_list");
1895                         memcpy(flist->sorted, flist->files,
1896                                flist->used * sizeof (struct file_struct*));
1897                 } else
1898                         flist->sorted = flist->files;
1899
1900                 flist_sort_and_clean(flist, 0);
1901
1902                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1903                 flist_done_allocating(flist);
1904
1905                 file_total += flist->used;
1906                 stats.flist_size += stats.total_written - start_write;
1907                 stats.num_files += flist->used;
1908                 if (verbose > 3)
1909                         output_flist(flist);
1910
1911                 if (DIR_FIRST_CHILD(dp) >= 0) {
1912                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1913                         send_dir_depth++;
1914                 } else {
1915                         while (DIR_NEXT_SIBLING(dp) < 0) {
1916                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1917                                         write_ndx(f, NDX_FLIST_EOF);
1918                                         flist_eof = 1;
1919                                         change_local_filter_dir(NULL, 0, 0);
1920                                         goto finish;
1921                                 }
1922                                 send_dir_depth--;
1923                                 file = dir_flist->sorted[send_dir_ndx];
1924                                 dp = F_DIR_NODE_P(file);
1925                         }
1926                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1927                 }
1928         }
1929
1930   finish:
1931         if (io_error != save_io_error && !ignore_errors)
1932                 send_msg_int(MSG_IO_ERROR, io_error);
1933 }
1934
1935 struct file_list *send_file_list(int f, int argc, char *argv[])
1936 {
1937         static const char *lastdir;
1938         static int lastdir_len = -1;
1939         int len, dirlen;
1940         STRUCT_STAT st;
1941         char *p, *dir;
1942         struct file_list *flist;
1943         struct timeval start_tv, end_tv;
1944         int64 start_write;
1945         int use_ff_fd = 0;
1946         int disable_buffering;
1947         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1948         int reading_remotely = filesfrom_host != NULL;
1949         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1950 #ifdef ICONV_OPTION
1951                      | (filesfrom_convert ? RL_CONVERT : 0)
1952 #endif
1953                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1954         int implied_dot_dir = 0;
1955
1956         rprintf(FLOG, "building file list\n");
1957         if (show_filelist_p())
1958                 start_filelist_progress("building file list");
1959         else if (inc_recurse && verbose && !am_server)
1960                 rprintf(FCLIENT, "sending incremental file list\n");
1961
1962         start_write = stats.total_written;
1963         gettimeofday(&start_tv, NULL);
1964
1965         if (!orig_dir)
1966                 orig_dir = strdup(curr_dir);
1967
1968         if (relative_paths && protocol_version >= 30)
1969                 implied_dirs = 1; /* We send flagged implied dirs */
1970
1971 #ifdef SUPPORT_HARD_LINKS
1972         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1973                 init_hard_links();
1974 #endif
1975
1976         flist = cur_flist = flist_new(0, "send_file_list");
1977         if (inc_recurse) {
1978                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1979                 flags |= FLAG_DIVERT_DIRS;
1980         } else
1981                 dir_flist = cur_flist;
1982
1983         disable_buffering = io_start_buffering_out(f);
1984         if (filesfrom_fd >= 0) {
1985                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
1986                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
1987                                 full_fname(argv[0]));
1988                         exit_cleanup(RERR_FILESELECT);
1989                 }
1990                 use_ff_fd = 1;
1991         }
1992
1993         while (1) {
1994                 char fbuf[MAXPATHLEN], *fn, name_type;
1995
1996                 if (use_ff_fd) {
1997                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1998                                 break;
1999                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2000                 } else {
2001                         if (argc-- == 0)
2002                                 break;
2003                         strlcpy(fbuf, *argv++, MAXPATHLEN);
2004                         if (sanitize_paths)
2005                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
2006                 }
2007
2008                 len = strlen(fbuf);
2009                 if (relative_paths) {
2010                         /* We clean up fbuf below. */
2011                         name_type = NORMAL_NAME;
2012                 } else if (!len || fbuf[len - 1] == '/') {
2013                         if (len == 2 && fbuf[0] == '.') {
2014                                 /* Turn "./" into just "." rather than "./." */
2015                                 fbuf[--len] = '\0';
2016                         } else {
2017                                 if (len + 1 >= MAXPATHLEN)
2018                                         overflow_exit("send_file_list");
2019                                 fbuf[len++] = '.';
2020                                 fbuf[len] = '\0';
2021                         }
2022                         name_type = DOTDIR_NAME;
2023                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
2024                     && (len == 2 || fbuf[len-3] == '/')) {
2025                         if (len + 2 >= MAXPATHLEN)
2026                                 overflow_exit("send_file_list");
2027                         fbuf[len++] = '/';
2028                         fbuf[len++] = '.';
2029                         fbuf[len] = '\0';
2030                         name_type = DOTDIR_NAME;
2031                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
2032                         name_type = DOTDIR_NAME;
2033                 else
2034                         name_type = NORMAL_NAME;
2035
2036                 dir = NULL;
2037
2038                 if (!relative_paths) {
2039                         p = strrchr(fbuf, '/');
2040                         if (p) {
2041                                 *p = '\0';
2042                                 if (p == fbuf)
2043                                         dir = "/";
2044                                 else
2045                                         dir = fbuf;
2046                                 len -= p - fbuf + 1;
2047                                 fn = p + 1;
2048                         } else
2049                                 fn = fbuf;
2050                 } else {
2051                         if ((p = strstr(fbuf, "/./")) != NULL) {
2052                                 *p = '\0';
2053                                 if (p == fbuf)
2054                                         dir = "/";
2055                                 else {
2056                                         dir = fbuf;
2057                                         clean_fname(dir, 0);
2058                                 }
2059                                 fn = p + 3;
2060                                 while (*fn == '/')
2061                                         fn++;
2062                                 if (!*fn)
2063                                         *--fn = '\0'; /* ensure room for '.' */
2064                         } else
2065                                 fn = fbuf;
2066                         /* A leading ./ can be used in relative mode to affect
2067                          * the dest dir without its name being in the path. */
2068                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2069                                 send_file_name(f, flist, ".", NULL,
2070                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2071                                     ALL_FILTERS);
2072                                 implied_dot_dir = 1;
2073                         }
2074                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2075                                             | CFN_DROP_TRAILING_DOT_DIR);
2076                         if (len == 1) {
2077                                 if (fn[0] == '/') {
2078                                         fn = "/.";
2079                                         len = 2;
2080                                         name_type = DOTDIR_NAME;
2081                                 } else if (fn[0] == '.')
2082                                         name_type = DOTDIR_NAME;
2083                         } else if (fn[len-1] == '/') {
2084                                 fn[--len] = '\0';
2085                                 if (len == 1 && *fn == '.')
2086                                         name_type = DOTDIR_NAME;
2087                                 else
2088                                         name_type = SLASH_ENDING_NAME;
2089                         }
2090                         /* Reject a ".." dir in the active part of the path. */
2091                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2092                                 if ((p[2] == '/' || p[2] == '\0')
2093                                  && (p == fn || p[-1] == '/')) {
2094                                         rprintf(FERROR,
2095                                             "found \"..\" dir in relative path: %s\n",
2096                                             fn);
2097                                         exit_cleanup(RERR_SYNTAX);
2098                                 }
2099                         }
2100                 }
2101
2102                 if (!*fn) {
2103                         len = 1;
2104                         fn = ".";
2105                         name_type = DOTDIR_NAME;
2106                 }
2107
2108                 dirlen = dir ? strlen(dir) : 0;
2109                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2110                         if (!change_pathname(NULL, dir, -dirlen))
2111                                 continue;
2112                         lastdir = pathname;
2113                         lastdir_len = pathname_len;
2114                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2115                         continue;
2116
2117                 if (fn != fbuf)
2118                         memmove(fbuf, fn, len + 1);
2119
2120                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2121                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2122                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2123                         io_error |= IOERR_GENERAL;
2124                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2125                                 full_fname(fbuf));
2126                         continue;
2127                 }
2128
2129                 /* A dot-dir should not be excluded! */
2130                 if (name_type != DOTDIR_NAME
2131                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2132                         continue;
2133
2134                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2135                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2136                         continue;
2137                 }
2138
2139                 if (inc_recurse && relative_paths && *fbuf) {
2140                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2141                                 if (p - fbuf == 1 && *fbuf == '.') {
2142                                         if ((fn = strchr(p+1, '/')) != NULL)
2143                                                 p = fn;
2144                                 } else
2145                                         fn = p;
2146                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2147                                 if (fn == p)
2148                                         continue;
2149                         }
2150                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2151                         /* Send the implied directories at the start of the
2152                          * source spec, so we get their permissions right. */
2153                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2154                 }
2155
2156                 if (one_file_system)
2157                         filesystem_dev = st.st_dev;
2158
2159                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2160                         struct file_struct *file;
2161                         file = send_file_name(f, flist, fbuf, &st,
2162                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2163                                               NO_FILTERS);
2164                         if (!file)
2165                                 continue;
2166                         if (inc_recurse) {
2167                                 if (name_type == DOTDIR_NAME) {
2168                                         if (send_dir_depth < 0) {
2169                                                 send_dir_depth = 0;
2170                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2171                                         }
2172                                         send_directory(f, flist, fbuf, len, flags);
2173                                 }
2174                         } else
2175                                 send_if_directory(f, flist, file, fbuf, len, flags);
2176                 } else
2177                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2178         }
2179
2180         gettimeofday(&end_tv, NULL);
2181         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2182                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2183         if (stats.flist_buildtime == 0)
2184                 stats.flist_buildtime = 1;
2185         start_tv = end_tv;
2186
2187         write_byte(f, 0); /* Indicate end of file list */
2188
2189 #ifdef SUPPORT_HARD_LINKS
2190         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2191                 idev_destroy();
2192 #endif
2193
2194         if (show_filelist_p())
2195                 finish_filelist_progress(flist);
2196
2197         gettimeofday(&end_tv, NULL);
2198         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2199                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2200
2201         /* When converting names, both sides keep an unsorted file-list array
2202          * because the names will differ on the sending and receiving sides
2203          * (both sides will use the unsorted index number for each item). */
2204
2205         /* Sort the list without removing any duplicates.  This allows the
2206          * receiving side to ask for whatever name it kept.  For incremental
2207          * recursion mode, the sender marks duplicate dirs so that it can
2208          * send them together in a single file-list. */
2209         if (need_unsorted_flist) {
2210                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2211                         out_of_memory("send_file_list");
2212                 memcpy(flist->sorted, flist->files,
2213                        flist->used * sizeof (struct file_struct*));
2214         } else
2215                 flist->sorted = flist->files;
2216         flist_sort_and_clean(flist, 0);
2217         file_total += flist->used;
2218
2219         if (numeric_ids <= 0 && !inc_recurse)
2220                 send_id_list(f);
2221
2222         /* send the io_error flag */
2223         if (protocol_version < 30)
2224                 write_int(f, ignore_errors ? 0 : io_error);
2225         else if (io_error && !ignore_errors)
2226                 send_msg_int(MSG_IO_ERROR, io_error);
2227
2228         if (disable_buffering)
2229                 io_end_buffering_out();
2230
2231         stats.flist_size = stats.total_written - start_write;
2232         stats.num_files = flist->used;
2233
2234         if (verbose > 3)
2235                 output_flist(flist);
2236
2237         if (verbose > 2)
2238                 rprintf(FINFO, "send_file_list done\n");
2239
2240         if (inc_recurse) {
2241                 send_dir_depth = 1;
2242                 add_dirs_to_tree(-1, flist, dir_count);
2243                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2244                         flist->parent_ndx = -1;
2245                 flist_done_allocating(flist);
2246                 if (send_dir_ndx < 0) {
2247                         write_ndx(f, NDX_FLIST_EOF);
2248                         flist_eof = 1;
2249                 }
2250                 else if (file_total == 1) {
2251                         /* If we're creating incremental file-lists and there
2252                          * was just 1 item in the first file-list, send 1 more
2253                          * file-list to check if this is a 1-file xfer. */
2254                         send_extra_file_list(f, 1);
2255                 }
2256         }
2257
2258         return flist;
2259 }
2260
2261 struct file_list *recv_file_list(int f)
2262 {
2263         struct file_list *flist;
2264         int dstart, flags;
2265         int64 start_read;
2266
2267         if (!first_flist)
2268                 rprintf(FLOG, "receiving file list\n");
2269         if (show_filelist_p())
2270                 start_filelist_progress("receiving file list");
2271         else if (inc_recurse && verbose && !am_server && !first_flist)
2272                 rprintf(FCLIENT, "receiving incremental file list\n");
2273
2274         start_read = stats.total_read;
2275
2276 #ifdef SUPPORT_HARD_LINKS
2277         if (preserve_hard_links && !first_flist)
2278                 init_hard_links();
2279 #endif
2280
2281         flist = flist_new(0, "recv_file_list");
2282
2283         if (inc_recurse) {
2284                 if (flist->ndx_start == 1)
2285                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2286                 dstart = dir_flist->used;
2287         } else {
2288                 dir_flist = flist;
2289                 dstart = 0;
2290         }
2291
2292         while ((flags = read_byte(f)) != 0) {
2293                 struct file_struct *file;
2294
2295                 flist_expand(flist, 1);
2296
2297                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2298                         flags |= read_byte(f) << 8;
2299                 file = recv_file_entry(flist, flags, f);
2300
2301                 if (inc_recurse && S_ISDIR(file->mode)) {
2302                         flist_expand(dir_flist, 1);
2303                         dir_flist->files[dir_flist->used++] = file;
2304                 }
2305
2306                 flist->files[flist->used++] = file;
2307
2308                 maybe_emit_filelist_progress(flist->used);
2309
2310                 if (verbose > 2) {
2311                         char *name = f_name(file, NULL);
2312                         rprintf(FINFO, "recv_file_name(%s)\n", NS(name));
2313                 }
2314         }
2315         file_total += flist->used;
2316
2317         if (verbose > 2)
2318                 rprintf(FINFO, "received %d names\n", flist->used);
2319
2320         if (show_filelist_p())
2321                 finish_filelist_progress(flist);
2322
2323         if (need_unsorted_flist) {
2324                 /* Create an extra array of index pointers that we can sort for
2325                  * the generator's use (for wading through the files in sorted
2326                  * order and for calling flist_find()).  We keep the "files"
2327                  * list unsorted for our exchange of index numbers with the
2328                  * other side (since their names may not sort the same). */
2329                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2330                         out_of_memory("recv_file_list");
2331                 memcpy(flist->sorted, flist->files,
2332                        flist->used * sizeof (struct file_struct*));
2333                 if (inc_recurse && dir_flist->used > dstart) {
2334                         static int dir_flist_malloced = 0;
2335                         if (dir_flist_malloced < dir_flist->malloced) {
2336                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2337                                                         struct file_struct *,
2338                                                         dir_flist->malloced);
2339                                 dir_flist_malloced = dir_flist->malloced;
2340                         }
2341                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2342                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2343                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2344                 }
2345         } else {
2346                 flist->sorted = flist->files;
2347                 if (inc_recurse && dir_flist->used > dstart) {
2348                         dir_flist->sorted = dir_flist->files;
2349                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2350                 }
2351         }
2352
2353         if (inc_recurse)
2354                 flist_done_allocating(flist);
2355         else if (f >= 0)
2356                 recv_id_list(f, flist);
2357
2358         flist_sort_and_clean(flist, relative_paths);
2359
2360         if (protocol_version < 30) {
2361                 /* Recv the io_error flag */
2362                 if (ignore_errors)
2363                         read_int(f);
2364                 else
2365                         io_error |= read_int(f);
2366         } else if (inc_recurse && flist->ndx_start == 1) {
2367                 if (!file_total || strcmp(flist->sorted[flist->low]->basename, ".") != 0)
2368                         flist->parent_ndx = -1;
2369         }
2370
2371         if (verbose > 3)
2372                 output_flist(flist);
2373
2374         if (verbose > 2)
2375                 rprintf(FINFO, "recv_file_list done\n");
2376
2377         stats.flist_size += stats.total_read - start_read;
2378         stats.num_files += flist->used;
2379
2380         return flist;
2381 }
2382
2383 /* This is only used once by the receiver if the very first file-list
2384  * has exactly one item in it. */
2385 void recv_additional_file_list(int f)
2386 {
2387         struct file_list *flist;
2388         int ndx = read_ndx(f);
2389         if (ndx == NDX_FLIST_EOF) {
2390                 flist_eof = 1;
2391                 change_local_filter_dir(NULL, 0, 0);
2392         } else {
2393                 ndx = NDX_FLIST_OFFSET - ndx;
2394                 if (ndx < 0 || ndx >= dir_flist->used) {
2395                         ndx = NDX_FLIST_OFFSET - ndx;
2396                         rprintf(FERROR,
2397                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2398                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2399                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2400                         exit_cleanup(RERR_PROTOCOL);
2401                 }
2402                 if (verbose > 3) {
2403                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2404                                 who_am_i(), ndx);
2405                 }
2406                 flist = recv_file_list(f);
2407                 flist->parent_ndx = ndx;
2408         }
2409 }
2410
2411 /* Search for an identically-named item in the file list.  Note that the
2412  * items must agree in their directory-ness, or no match is returned. */
2413 int flist_find(struct file_list *flist, struct file_struct *f)
2414 {
2415         int low = flist->low, high = flist->high;
2416         int diff, mid, mid_up;
2417
2418         while (low <= high) {
2419                 mid = (low + high) / 2;
2420                 if (F_IS_ACTIVE(flist->sorted[mid]))
2421                         mid_up = mid;
2422                 else {
2423                         /* Scan for the next non-empty entry using the cached
2424                          * distance values.  If the value isn't fully up-to-
2425                          * date, update it. */
2426                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2427                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2428                                 do {
2429                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2430                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2431                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2432                         }
2433                         if (mid_up > high) {
2434                                 /* If there's nothing left above us, set high to
2435                                  * a non-empty entry below us and continue. */
2436                                 high = mid - (int)flist->sorted[mid]->len32;
2437                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2438                                         do {
2439                                             high -= (int)flist->sorted[high]->len32;
2440                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2441                                         flist->sorted[mid]->len32 = mid - high;
2442                                 }
2443                                 continue;
2444                         }
2445                 }
2446                 diff = f_name_cmp(flist->sorted[mid_up], f);
2447                 if (diff == 0) {
2448                         if (protocol_version < 29
2449                             && S_ISDIR(flist->sorted[mid_up]->mode)
2450                             != S_ISDIR(f->mode))
2451                                 return -1;
2452                         return mid_up;
2453                 }
2454                 if (diff < 0)
2455                         low = mid_up + 1;
2456                 else
2457                         high = mid - 1;
2458         }
2459         return -1;
2460 }
2461
2462 /*
2463  * Free up any resources a file_struct has allocated
2464  * and clear the file.
2465  */
2466 void clear_file(struct file_struct *file)
2467 {
2468         /* The +1 zeros out the first char of the basename. */
2469         memset(file, 0, FILE_STRUCT_LEN + 1);
2470         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2471          * entry.  Likewise for len32 in the opposite direction.  We assume
2472          * that we're alone for now since flist_find() will adjust the counts
2473          * it runs into that aren't up-to-date. */
2474         file->len32 = F_DEPTH(file) = 1;
2475 }
2476
2477 /* Allocate a new file list. */
2478 struct file_list *flist_new(int flags, char *msg)
2479 {
2480         struct file_list *flist;
2481
2482         if (!(flist = new0(struct file_list)))
2483                 out_of_memory(msg);
2484
2485         if (flags & FLIST_TEMP) {
2486                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2487                                                 out_of_memory, POOL_INTERN)))
2488                         out_of_memory(msg);
2489         } else {
2490                 /* This is a doubly linked list with prev looping back to
2491                  * the end of the list, but the last next pointer is NULL. */
2492                 if (!first_flist) {
2493                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2494                                                 out_of_memory, POOL_INTERN);
2495                         if (!flist->file_pool)
2496                                 out_of_memory(msg);
2497
2498                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2499
2500                         first_flist = cur_flist = flist->prev = flist;
2501                 } else {
2502                         struct file_list *prev = first_flist->prev;
2503
2504                         flist->file_pool = first_flist->file_pool;
2505
2506                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2507                         flist->flist_num = prev->flist_num + 1;
2508
2509                         flist->prev = prev;
2510                         prev->next = first_flist->prev = flist;
2511                 }
2512                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2513                 flist_cnt++;
2514         }
2515
2516         return flist;
2517 }
2518
2519 /* Free up all elements in a flist. */
2520 void flist_free(struct file_list *flist)
2521 {
2522         if (!flist->prev) {
2523                 /* Was FLIST_TEMP dir-list. */
2524         } else if (flist == flist->prev) {
2525                 first_flist = cur_flist = NULL;
2526                 file_total = 0;
2527                 flist_cnt = 0;
2528         } else {
2529                 if (flist == cur_flist)
2530                         cur_flist = flist->next;
2531                 if (flist == first_flist)
2532                         first_flist = first_flist->next;
2533                 else {
2534                         flist->prev->next = flist->next;
2535                         if (!flist->next)
2536                                 flist->next = first_flist;
2537                 }
2538                 flist->next->prev = flist->prev;
2539                 file_total -= flist->used;
2540                 flist_cnt--;
2541         }
2542
2543         if (!flist->prev || !flist_cnt)
2544                 pool_destroy(flist->file_pool);
2545         else
2546                 pool_free_old(flist->file_pool, flist->pool_boundary);
2547
2548         if (flist->sorted && flist->sorted != flist->files)
2549                 free(flist->sorted);
2550         free(flist->files);
2551         free(flist);
2552 }
2553
2554 /* This routine ensures we don't have any duplicate names in our file list.
2555  * duplicate names can cause corruption because of the pipelining. */
2556 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2557 {
2558         char fbuf[MAXPATHLEN];
2559         int i, prev_i;
2560
2561         if (!flist)
2562                 return;
2563         if (flist->used == 0) {
2564                 flist->high = -1;
2565                 flist->low = 0;
2566                 return;
2567         }
2568
2569         fsort(flist->sorted, flist->used);
2570
2571         if (!am_sender || inc_recurse) {
2572                 for (i = prev_i = 0; i < flist->used; i++) {
2573                         if (F_IS_ACTIVE(flist->sorted[i])) {
2574                                 prev_i = i;
2575                                 break;
2576                         }
2577                 }
2578                 flist->low = prev_i;
2579         } else {
2580                 i = prev_i = flist->used - 1;
2581                 flist->low = 0;
2582         }
2583
2584         while (++i < flist->used) {
2585                 int j;
2586                 struct file_struct *file = flist->sorted[i];
2587
2588                 if (!F_IS_ACTIVE(file))
2589                         continue;
2590                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2591                         j = prev_i;
2592                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2593                         int save_mode = file->mode;
2594                         /* Make sure that this directory doesn't duplicate a
2595                          * non-directory earlier in the list. */
2596                         flist->high = prev_i;
2597                         file->mode = S_IFREG;
2598                         j = flist_find(flist, file);
2599                         file->mode = save_mode;
2600                 } else
2601                         j = -1;
2602                 if (j >= 0) {
2603                         int keep, drop;
2604                         /* If one is a dir and the other is not, we want to
2605                          * keep the dir because it might have contents in the
2606                          * list.  Otherwise keep the first one. */
2607                         if (S_ISDIR(file->mode)) {
2608                                 struct file_struct *fp = flist->sorted[j];
2609                                 if (!S_ISDIR(fp->mode))
2610                                         keep = i, drop = j;
2611                                 else {
2612                                         if (am_sender)
2613                                                 file->flags |= FLAG_DUPLICATE;
2614                                         else { /* Make sure we merge our vital flags. */
2615                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2616                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2617                                         }
2618                                         keep = j, drop = i;
2619                                 }
2620                         } else
2621                                 keep = j, drop = i;
2622
2623                         if (!am_sender) {
2624                                 if (verbose > 1) {
2625                                         rprintf(FINFO,
2626                                             "removing duplicate name %s from file list (%d)\n",
2627                                             f_name(file, fbuf), drop + flist->ndx_start);
2628                                 }
2629                                 clear_file(flist->sorted[drop]);
2630                         }
2631
2632                         if (keep == i) {
2633                                 if (flist->low == drop) {
2634                                         for (j = drop + 1;
2635                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2636                                              j++) {}
2637                                         flist->low = j;
2638                                 }
2639                                 prev_i = i;
2640                         }
2641                 } else
2642                         prev_i = i;
2643         }
2644         flist->high = prev_i;
2645
2646         if (strip_root) {
2647                 /* We need to strip off the leading slashes for relative
2648                  * paths, but this must be done _after_ the sorting phase. */
2649                 for (i = flist->low; i <= flist->high; i++) {
2650                         struct file_struct *file = flist->sorted[i];
2651
2652                         if (!file->dirname)
2653                                 continue;
2654                         while (*file->dirname == '/')
2655                                 file->dirname++;
2656                         if (!*file->dirname)
2657                                 file->dirname = NULL;
2658                 }
2659         }
2660
2661         if (prune_empty_dirs && !am_sender) {
2662                 int j, prev_depth = 0;
2663
2664                 prev_i = 0; /* It's OK that this isn't really true. */
2665
2666                 for (i = flist->low; i <= flist->high; i++) {
2667                         struct file_struct *fp, *file = flist->sorted[i];
2668
2669                         /* This temporarily abuses the F_DEPTH() value for a
2670                          * directory that is in a chain that might get pruned.
2671                          * We restore the old value if it gets a reprieve. */
2672                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2673                                 /* Dump empty dirs when coming back down. */
2674                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2675                                         fp = flist->sorted[prev_i];
2676                                         if (F_DEPTH(fp) >= 0)
2677                                                 break;
2678                                         prev_i = -F_DEPTH(fp)-1;
2679                                         clear_file(fp);
2680                                 }
2681                                 prev_depth = F_DEPTH(file);
2682                                 if (is_excluded(f_name(file, fbuf), 1,
2683                                                        ALL_FILTERS)) {
2684                                         /* Keep dirs through this dir. */
2685                                         for (j = prev_depth-1; ; j--) {
2686                                                 fp = flist->sorted[prev_i];
2687                                                 if (F_DEPTH(fp) >= 0)
2688                                                         break;
2689                                                 prev_i = -F_DEPTH(fp)-1;
2690                                                 F_DEPTH(fp) = j;
2691                                         }
2692                                 } else
2693                                         F_DEPTH(file) = -prev_i-1;
2694                                 prev_i = i;
2695                         } else {
2696                                 /* Keep dirs through this non-dir. */
2697                                 for (j = prev_depth; ; j--) {
2698                                         fp = flist->sorted[prev_i];
2699                                         if (F_DEPTH(fp) >= 0)
2700                                                 break;
2701                                         prev_i = -F_DEPTH(fp)-1;
2702                                         F_DEPTH(fp) = j;
2703                                 }
2704                         }
2705                 }
2706                 /* Dump all remaining empty dirs. */
2707                 while (1) {
2708                         struct file_struct *fp = flist->sorted[prev_i];
2709                         if (F_DEPTH(fp) >= 0)
2710                                 break;
2711                         prev_i = -F_DEPTH(fp)-1;
2712                         clear_file(fp);
2713                 }
2714
2715                 for (i = flist->low; i <= flist->high; i++) {
2716                         if (F_IS_ACTIVE(flist->sorted[i]))
2717                                 break;
2718                 }
2719                 flist->low = i;
2720                 for (i = flist->high; i >= flist->low; i--) {
2721                         if (F_IS_ACTIVE(flist->sorted[i]))
2722                                 break;
2723                 }
2724                 flist->high = i;
2725         }
2726 }
2727
2728 static void output_flist(struct file_list *flist)
2729 {
2730         char uidbuf[16], gidbuf[16], depthbuf[16];
2731         struct file_struct *file;
2732         const char *root, *dir, *slash, *name, *trail;
2733         const char *who = who_am_i();
2734         int i;
2735
2736         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2737                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2738         for (i = 0; i < flist->used; i++) {
2739                 file = flist->files[i];
2740                 if ((am_root || am_sender) && uid_ndx) {
2741                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2742                                  F_OWNER(file));
2743                 } else
2744                         *uidbuf = '\0';
2745                 if (gid_ndx) {
2746                         static char parens[] = "(\0)\0\0\0";
2747                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2748                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2749                                  pp, F_GROUP(file), pp + 2);
2750                 } else
2751                         *gidbuf = '\0';
2752                 if (!am_sender)
2753                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2754                 if (F_IS_ACTIVE(file)) {
2755                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2756                         if ((dir = file->dirname) == NULL)
2757                                 dir = slash = "";
2758                         else
2759                                 slash = "/";
2760                         name = file->basename;
2761                         trail = S_ISDIR(file->mode) ? "/" : "";
2762                 } else
2763                         root = dir = slash = name = trail = "";
2764                 rprintf(FINFO,
2765                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2766                         who, i + flist->ndx_start,
2767                         root, dir, slash, name, trail,
2768                         (int)file->mode, (double)F_LENGTH(file),
2769                         uidbuf, gidbuf, file->flags);
2770         }
2771 }
2772
2773 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2774 enum fnc_type { t_PATH, t_ITEM };
2775
2776 static int found_prefix;
2777
2778 /* Compare the names of two file_struct entities, similar to how strcmp()
2779  * would do if it were operating on the joined strings.
2780  *
2781  * Some differences beginning with protocol_version 29: (1) directory names
2782  * are compared with an assumed trailing slash so that they compare in a
2783  * way that would cause them to sort immediately prior to any content they
2784  * may have; (2) a directory of any name compares after a non-directory of
2785  * any name at the same depth; (3) a directory with name "." compares prior
2786  * to anything else.  These changes mean that a directory and a non-dir
2787  * with the same name will not compare as equal (protocol_version >= 29).
2788  *
2789  * The dirname component can be an empty string, but the basename component
2790  * cannot (and never is in the current codebase).  The basename component
2791  * may be NULL (for a removed item), in which case it is considered to be
2792  * after any existing item. */
2793 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2794 {
2795         int dif;
2796         const uchar *c1, *c2;
2797         enum fnc_state state1, state2;
2798         enum fnc_type type1, type2;
2799         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2800
2801         if (!f1 || !F_IS_ACTIVE(f1)) {
2802                 if (!f2 || !F_IS_ACTIVE(f2))
2803                         return 0;
2804                 return -1;
2805         }
2806         if (!f2 || !F_IS_ACTIVE(f2))
2807                 return 1;
2808
2809         c1 = (uchar*)f1->dirname;
2810         c2 = (uchar*)f2->dirname;
2811         if (c1 == c2)
2812                 c1 = c2 = NULL;
2813         if (!c1) {
2814                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2815                 c1 = (const uchar*)f1->basename;
2816                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2817                         type1 = t_ITEM;
2818                         state1 = s_TRAILING;
2819                         c1 = (uchar*)"";
2820                 } else
2821                         state1 = s_BASE;
2822         } else {
2823                 type1 = t_path;
2824                 state1 = s_DIR;
2825         }
2826         if (!c2) {
2827                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2828                 c2 = (const uchar*)f2->basename;
2829                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2830                         type2 = t_ITEM;
2831                         state2 = s_TRAILING;
2832                         c2 = (uchar*)"";
2833                 } else
2834                         state2 = s_BASE;
2835         } else {
2836                 type2 = t_path;
2837                 state2 = s_DIR;
2838         }
2839
2840         if (type1 != type2)
2841                 return type1 == t_PATH ? 1 : -1;
2842
2843         do {
2844                 if (!*c1) {
2845                         switch (state1) {
2846                         case s_DIR:
2847                                 state1 = s_SLASH;
2848                                 c1 = (uchar*)"/";
2849                                 break;
2850                         case s_SLASH:
2851                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2852                                 c1 = (const uchar*)f1->basename;
2853                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2854                                         type1 = t_ITEM;
2855                                         state1 = s_TRAILING;
2856                                         c1 = (uchar*)"";
2857                                 } else
2858                                         state1 = s_BASE;
2859                                 break;
2860                         case s_BASE:
2861                                 state1 = s_TRAILING;
2862                                 if (type1 == t_PATH) {
2863                                         c1 = (uchar*)"/";
2864                                         break;
2865                                 }
2866                                 /* FALL THROUGH */
2867                         case s_TRAILING:
2868                                 type1 = t_ITEM;
2869                                 break;
2870                         }
2871                         if (*c2 && type1 != type2)
2872                                 return type1 == t_PATH ? 1 : -1;
2873                 }
2874                 if (!*c2) {
2875                         switch (state2) {
2876                         case s_DIR:
2877                                 state2 = s_SLASH;
2878                                 c2 = (uchar*)"/";
2879                                 break;
2880                         case s_SLASH:
2881                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2882                                 c2 = (const uchar*)f2->basename;
2883                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2884                                         type2 = t_ITEM;
2885                                         state2 = s_TRAILING;
2886                                         c2 = (uchar*)"";
2887                                 } else
2888                                         state2 = s_BASE;
2889                                 break;
2890                         case s_BASE:
2891                                 state2 = s_TRAILING;
2892                                 if (type2 == t_PATH) {
2893                                         c2 = (uchar*)"/";
2894                                         break;
2895                                 }
2896                                 /* FALL THROUGH */
2897                         case s_TRAILING:
2898                                 found_prefix = 1;
2899                                 if (!*c1)
2900                                         return 0;
2901                                 type2 = t_ITEM;
2902                                 break;
2903                         }
2904                         if (type1 != type2)
2905                                 return type1 == t_PATH ? 1 : -1;
2906                 }
2907         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2908
2909         return dif;
2910 }
2911
2912 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2913  * not match if f2's basename is not an exact match of a path element in f1.
2914  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2915 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2916 {
2917         found_prefix = 0;
2918         f_name_cmp(f1, f2);
2919         return found_prefix;
2920 }
2921
2922 char *f_name_buf(void)
2923 {
2924         static char names[5][MAXPATHLEN];
2925         static unsigned int n;
2926
2927         n = (n + 1) % (sizeof names / sizeof names[0]);
2928
2929         return names[n];
2930 }
2931
2932 /* Return a copy of the full filename of a flist entry, using the indicated
2933  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2934  * done because we checked the size when creating the file_struct entry.
2935  */
2936 char *f_name(const struct file_struct *f, char *fbuf)
2937 {
2938         if (!f || !F_IS_ACTIVE(f))
2939                 return NULL;
2940
2941         if (!fbuf)
2942                 fbuf = f_name_buf();
2943
2944         if (f->dirname) {
2945                 int len = strlen(f->dirname);
2946                 memcpy(fbuf, f->dirname, len);
2947                 fbuf[len] = '/';
2948                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2949         } else
2950                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2951
2952         return fbuf;
2953 }
2954
2955 /* Do a non-recursive scan of the named directory, possibly ignoring all
2956  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2957  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2958  * buffer (the functions we call will append names onto the end, but the old
2959  * dir value will be restored on exit). */
2960 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2961 {
2962         struct file_list *dirlist;
2963         char dirbuf[MAXPATHLEN];
2964         int save_recurse = recurse;
2965         int save_xfer_dirs = xfer_dirs;
2966         int save_prune_empty_dirs = prune_empty_dirs;
2967
2968         if (dlen < 0) {
2969                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2970                 if (dlen >= MAXPATHLEN)
2971                         return NULL;
2972                 dirname = dirbuf;
2973         }
2974
2975         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2976
2977         recurse = 0;
2978         xfer_dirs = 1;
2979         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2980         xfer_dirs = save_xfer_dirs;
2981         recurse = save_recurse;
2982         if (do_progress)
2983                 flist_count_offset += dirlist->used;
2984
2985         prune_empty_dirs = 0;
2986         dirlist->sorted = dirlist->files;
2987         flist_sort_and_clean(dirlist, 0);
2988         prune_empty_dirs = save_prune_empty_dirs;
2989
2990         if (verbose > 3)
2991                 output_flist(dirlist);
2992
2993         return dirlist;
2994 }