flist.c

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