flist.c

   1 /*
   2  * Generate and receive file lists.
   3  *
   4  * Copyright (C) 1996 Andrew Tridgell
   5  * Copyright (C) 1996 Paul Mackerras
   6  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
   7  * Copyright (C) 2002-2008 Wayne Davison
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, visit the http://fsf.org website.
  21  */
  22
  23 #include "rsync.h"
  24 #include "ifuncs.h"
  25 #include "rounding.h"
  26 #include "io.h"
  27
  28 extern int am_root;
  29 extern int am_server;
  30 extern int am_daemon;
  31 extern int am_sender;
  32 extern int am_generator;
  33 extern int inc_recurse;
  34 extern int always_checksum;
  35 extern int module_id;
  36 extern int ignore_errors;
  37 extern int numeric_ids;
  38 extern int recurse;
  39 extern int use_qsort;
  40 extern int xfer_dirs;
  41 extern int filesfrom_fd;
  42 extern int one_file_system;
  43 extern int copy_dirlinks;
  44 extern int keep_dirlinks;
  45 extern int preserve_uid;
  46 extern int preserve_gid;
  47 extern int preserve_acls;
  48 extern int preserve_xattrs;
  49 extern int preserve_links;
  50 extern int preserve_hard_links;
  51 extern int preserve_devices;
  52 extern int preserve_specials;
  53 extern int uid_ndx;
  54 extern int gid_ndx;
  55 extern int eol_nulls;
  56 extern int relative_paths;
  57 extern int implied_dirs;
  58 extern int file_extra_cnt;
  59 extern int ignore_perishable;
  60 extern int non_perishable_cnt;
  61 extern int prune_empty_dirs;
  62 extern int copy_links;
  63 extern int copy_unsafe_links;
  64 extern int protocol_version;
  65 extern int sanitize_paths;
  66 extern int munge_symlinks;
  67 extern int need_unsorted_flist;
  68 extern int output_needs_newline;
  69 extern int unsort_ndx;
  70 extern struct stats stats;
  71 extern char *filesfrom_host;
  72
  73 extern char curr_dir[MAXPATHLEN];
  74
  75 extern struct chmod_mode_struct *chmod_modes;
  76
  77 extern struct filter_list_struct filter_list;
  78 extern struct filter_list_struct daemon_filter_list;
  79
  80 #ifdef ICONV_OPTION
  81 extern int filesfrom_convert;
  82 extern iconv_t ic_send, ic_recv;
  83 #endif
  84
  85 #define PTR_SIZE (sizeof (struct file_struct *))
  86
  87 int io_error;
  88 int checksum_len;
  89 dev_t filesystem_dev; /* used to implement -x */
  90
  91 struct file_list *cur_flist, *first_flist, *dir_flist;
  92 int send_dir_ndx = -1, send_dir_depth = -1;
  93 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  94 int file_total = 0; /* total of all active items over all file-lists */
  95 int flist_eof = 0; /* all the file-lists are now known */
  96
  97 #define NORMAL_NAME 0
  98 #define SLASH_ENDING_NAME 1
  99 #define DOTDIR_NAME 2
 100
 101 /* Starting from protocol version 26, we always use 64-bit ino_t and dev_t
 102  * internally, even if this platform does not allow files to have 64-bit inums.
 103  * The only exception is if we're on a platform with no 64-bit type at all.
 104  *
 105  * Because we use read_longint() to get these off the wire, if you transfer
 106  * devices or (for protocols < 30) hardlinks with dev or inum > 2**32 to a
 107  * machine with no 64-bit types then you will get an overflow error.
 108  *
 109  * Note that if you transfer devices from a 64-bit-devt machine (say, Solaris)
 110  * to a 32-bit-devt machine (say, Linux-2.2/x86) then the device numbers will
 111  * be truncated.  But it's a kind of silly thing to do anyhow. */
 112
 113 /* The tmp_* vars are used as a cache area by make_file() to store data
 114  * that the sender doesn't need to remember in its file list.  The data
 115  * will survive just long enough to be used by send_file_entry(). */
 116 static dev_t tmp_rdev;
 117 #ifdef SUPPORT_HARD_LINKS
 118 static int64 tmp_dev, tmp_ino;
 119 #endif
 120 static char tmp_sum[MAX_DIGEST_LEN];
 121
 122 static char empty_sum[MAX_DIGEST_LEN];
 123 static int flist_count_offset; /* for --delete --progress */
 124 static int dir_count = 0;
 125
 126 static void flist_sort_and_clean(struct file_list *flist, int strip_root);
 127 static void output_flist(struct file_list *flist);
 128
 129 void init_flist(void)
 130 {
 131         if (DEBUG_GTE(FLIST, 4)) {
 132                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
 133                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
 134         }
 135         checksum_len = protocol_version < 21 ? 2
 136                      : protocol_version < 30 ? MD4_DIGEST_LEN
 137                      : MD5_DIGEST_LEN;
 138 }
 139
 140 static int show_filelist_p(void)
 141 {
 142         return INFO_GTE(FLIST, 1) && xfer_dirs && !am_server && !inc_recurse;
 143 }
 144
 145 static void start_filelist_progress(char *kind)
 146 {
 147         rprintf(FCLIENT, "%s ... ", kind);
 148         output_needs_newline = 1;
 149         rflush(FINFO);
 150 }
 151
 152 static void emit_filelist_progress(int count)
 153 {
 154         rprintf(FCLIENT, " %d files...\r", count);
 155 }
 156
 157 static void maybe_emit_filelist_progress(int count)
 158 {
 159         if (INFO_GTE(FLIST, 2) && show_filelist_p() && (count % 100) == 0)
 160                 emit_filelist_progress(count);
 161 }
 162
 163 static void finish_filelist_progress(const struct file_list *flist)
 164 {
 165         if (INFO_GTE(FLIST, 2)) {
 166                 /* This overwrites the progress line */
 167                 rprintf(FINFO, "%d file%sto consider\n",
 168                         flist->used, flist->used == 1 ? " " : "s ");
 169         } else {
 170                 output_needs_newline = 0;
 171                 rprintf(FINFO, "done\n");
 172         }
 173 }
 174
 175 void show_flist_stats(void)
 176 {
 177         /* Nothing yet */
 178 }
 179
 180 /* Stat either a symlink or its referent, depending on the settings of
 181  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 182  *
 183  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 184  * MAXPATHLEN chars) will be set to the symlink's target string.
 185  *
 186  * The stat structure pointed to by stp will contain information about the
 187  * link or the referent as appropriate, if they exist. */
 188 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 189 {
 190 #ifdef SUPPORT_LINKS
 191         if (link_stat(path, stp, copy_dirlinks) < 0)
 192                 return -1;
 193         if (S_ISLNK(stp->st_mode)) {
 194                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 195                 if (llen < 0)
 196                         return -1;
 197                 linkbuf[llen] = '\0';
 198                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 199                         if (INFO_GTE(SYMSAFE, 1)) {
 200                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 201                                         path, linkbuf);
 202                         }
 203                         return x_stat(path, stp, NULL);
 204                 }
 205                 if (munge_symlinks && am_sender && llen > SYMLINK_PREFIX_LEN
 206                  && strncmp(linkbuf, SYMLINK_PREFIX, SYMLINK_PREFIX_LEN) == 0) {
 207                         memmove(linkbuf, linkbuf + SYMLINK_PREFIX_LEN,
 208                                 llen - SYMLINK_PREFIX_LEN + 1);
 209                 }
 210         }
 211         return 0;
 212 #else
 213         return x_stat(path, stp, NULL);
 214 #endif
 215 }
 216
 217 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 218 {
 219 #ifdef SUPPORT_LINKS
 220         if (copy_links)
 221                 return x_stat(path, stp, NULL);
 222         if (x_lstat(path, stp, NULL) < 0)
 223                 return -1;
 224         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 225                 STRUCT_STAT st;
 226                 if (x_stat(path, &st, NULL) == 0 && S_ISDIR(st.st_mode))
 227                         *stp = st;
 228         }
 229         return 0;
 230 #else
 231         return x_stat(path, stp, NULL);
 232 #endif
 233 }
 234
 235 static inline int is_daemon_excluded(const char *fname, int is_dir)
 236 {
 237         if (daemon_filter_list.head
 238          && check_filter(&daemon_filter_list, FLOG, fname, is_dir) < 0) {
 239                 errno = ENOENT;
 240                 return 1;
 241         }
 242         return 0;
 243 }
 244
 245 static inline int path_is_daemon_excluded(char *path, int ignore_filename)
 246 {
 247         if (daemon_filter_list.head) {
 248                 char *slash = path;
 249
 250                 while ((slash = strchr(slash+1, '/')) != NULL) {
 251                         int ret;
 252                         *slash = '\0';
 253                         ret = check_filter(&daemon_filter_list, FLOG, path, 1);
 254                         *slash = '/';
 255                         if (ret < 0) {
 256                                 errno = ENOENT;
 257                                 return 1;
 258                         }
 259                 }
 260
 261                 if (!ignore_filename
 262                  && check_filter(&daemon_filter_list, FLOG, path, 1) < 0) {
 263                         errno = ENOENT;
 264                         return 1;
 265                 }
 266         }
 267
 268         return 0;
 269 }
 270
 271 /* This function is used to check if a file should be included/excluded
 272  * from the list of files based on its name and type etc.  The value of
 273  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 274 static int is_excluded(const char *fname, int is_dir, int filter_level)
 275 {
 276 #if 0 /* This currently never happens, so avoid a useless compare. */
 277         if (filter_level == NO_FILTERS)
 278                 return 0;
 279 #endif
 280         if (is_daemon_excluded(fname, is_dir))
 281                 return 1;
 282         if (filter_level != ALL_FILTERS)
 283                 return 0;
 284         if (filter_list.head
 285             && check_filter(&filter_list, FINFO, fname, is_dir) < 0)
 286                 return 1;
 287         return 0;
 288 }
 289
 290 static void send_directory(int f, struct file_list *flist,
 291                            char *fbuf, int len, int flags);
 292
 293 static const char *pathname, *orig_dir;
 294 static int pathname_len;
 295
 296 /* Make sure flist can hold at least flist->used + extra entries. */
 297 static void flist_expand(struct file_list *flist, int extra)
 298 {
 299         struct file_struct **new_ptr;
 300
 301         if (flist->used + extra <= flist->malloced)
 302                 return;
 303
 304         if (flist->malloced < FLIST_START)
 305                 flist->malloced = FLIST_START;
 306         else if (flist->malloced >= FLIST_LINEAR)
 307                 flist->malloced += FLIST_LINEAR;
 308         else
 309                 flist->malloced *= 2;
 310
 311         /* In case count jumped or we are starting the list
 312          * with a known size just set it. */
 313         if (flist->malloced < flist->used + extra)
 314                 flist->malloced = flist->used + extra;
 315
 316         new_ptr = realloc_array(flist->files, struct file_struct *,
 317                                 flist->malloced);
 318
 319         if (DEBUG_GTE(FLIST, 1) && flist->malloced != FLIST_START) {
 320                 rprintf(FCLIENT, "[%s] expand file_list pointer array to %s bytes, did%s move\n",
 321                     who_am_i(),
 322                     big_num(sizeof flist->files[0] * flist->malloced, 0),
 323                     (new_ptr == flist->files) ? " not" : "");
 324         }
 325
 326         flist->files = new_ptr;
 327
 328         if (!flist->files)
 329                 out_of_memory("flist_expand");
 330 }
 331
 332 static void flist_done_allocating(struct file_list *flist)
 333 {
 334         void *ptr = pool_boundary(flist->file_pool, 8*1024);
 335         if (flist->pool_boundary == ptr)
 336                 flist->pool_boundary = NULL; /* list didn't use any pool memory */
 337         else
 338                 flist->pool_boundary = ptr;
 339 }
 340
 341 /* Call this with EITHER (1) "file, NULL, 0" to chdir() to the file's
 342  * F_PATHNAME(), or (2) "NULL, dir, dirlen" to chdir() to the supplied dir,
 343  * with dir == NULL taken to be the starting directory, and dirlen < 0
 344  * indicating that strdup(dir) should be called and then the -dirlen length
 345  * value checked to ensure that it is not daemon-excluded. */
 346 int change_pathname(struct file_struct *file, const char *dir, int dirlen)
 347 {
 348         if (dirlen < 0) {
 349                 char *cpy = strdup(dir);
 350                 if (*cpy != '/')
 351                         change_dir(orig_dir, CD_SKIP_CHDIR);
 352                 if (path_is_daemon_excluded(cpy, 0))
 353                         goto chdir_error;
 354                 dir = cpy;
 355                 dirlen = -dirlen;
 356         } else {
 357                 if (file) {
 358                         if (pathname == F_PATHNAME(file))
 359                                 return 1;
 360                         dir = F_PATHNAME(file);
 361                         if (dir)
 362                                 dirlen = strlen(dir);
 363                 } else if (pathname == dir)
 364                         return 1;
 365                 if (dir && *dir != '/')
 366                         change_dir(orig_dir, CD_SKIP_CHDIR);
 367         }
 368
 369         pathname = dir;
 370         pathname_len = dirlen;
 371
 372         if (!dir)
 373                 dir = orig_dir;
 374
 375         if (!change_dir(dir, CD_NORMAL)) {
 376           chdir_error:
 377                 io_error |= IOERR_GENERAL;
 378                 rsyserr(FERROR, errno, "change_dir %s failed", full_fname(dir));
 379                 if (dir != orig_dir)
 380                         change_dir(orig_dir, CD_NORMAL);
 381                 pathname = NULL;
 382                 pathname_len = 0;
 383                 return 0;
 384         }
 385
 386         return 1;
 387 }
 388
 389 static void send_file_entry(int f, const char *fname, struct file_struct *file, int ndx, int first_ndx)
 390 {
 391         static time_t modtime;
 392         static mode_t mode;
 393 #ifdef SUPPORT_HARD_LINKS
 394         static int64 dev;
 395 #endif
 396         static dev_t rdev;
 397         static uint32 rdev_major;
 398         static uid_t uid;
 399         static gid_t gid;
 400         static const char *user_name, *group_name;
 401         static char lastname[MAXPATHLEN];
 402 #ifdef SUPPORT_HARD_LINKS
 403         int first_hlink_ndx = -1;
 404 #endif
 405         int l1, l2;
 406         int xflags;
 407
 408         /* Initialize starting value of xflags. */
 409         if (protocol_version >= 30 && S_ISDIR(file->mode)) {
 410                 dir_count++;
 411                 if (file->flags & FLAG_CONTENT_DIR)
 412                         xflags = file->flags & FLAG_TOP_DIR;
 413                 else if (file->flags & FLAG_IMPLIED_DIR)
 414                         xflags = XMIT_TOP_DIR | XMIT_NO_CONTENT_DIR;
 415                 else
 416                         xflags = XMIT_NO_CONTENT_DIR;
 417         } else
 418                 xflags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 419
 420         if (file->mode == mode)
 421                 xflags |= XMIT_SAME_MODE;
 422         else
 423                 mode = file->mode;
 424
 425         if ((preserve_devices && IS_DEVICE(mode))
 426          || (preserve_specials && IS_SPECIAL(mode))) {
 427                 if (protocol_version < 28) {
 428                         if (tmp_rdev == rdev)
 429                                 xflags |= XMIT_SAME_RDEV_pre28;
 430                         else
 431                                 rdev = tmp_rdev;
 432                 } else {
 433                         rdev = tmp_rdev;
 434                         if ((uint32)major(rdev) == rdev_major)
 435                                 xflags |= XMIT_SAME_RDEV_MAJOR;
 436                         else
 437                                 rdev_major = major(rdev);
 438                         if (protocol_version < 30 && (uint32)minor(rdev) <= 0xFFu)
 439                                 xflags |= XMIT_RDEV_MINOR_8_pre30;
 440                 }
 441         } else if (protocol_version < 28)
 442                 rdev = MAKEDEV(0, 0);
 443         if (!preserve_uid || ((uid_t)F_OWNER(file) == uid && *lastname))
 444                 xflags |= XMIT_SAME_UID;
 445         else {
 446                 uid = F_OWNER(file);
 447                 if (!numeric_ids) {
 448                         user_name = add_uid(uid);
 449                         if (inc_recurse && user_name)
 450                                 xflags |= XMIT_USER_NAME_FOLLOWS;
 451                 }
 452         }
 453         if (!preserve_gid || ((gid_t)F_GROUP(file) == gid && *lastname))
 454                 xflags |= XMIT_SAME_GID;
 455         else {
 456                 gid = F_GROUP(file);
 457                 if (!numeric_ids) {
 458                         group_name = add_gid(gid);
 459                         if (inc_recurse && group_name)
 460                                 xflags |= XMIT_GROUP_NAME_FOLLOWS;
 461                 }
 462         }
 463         if (file->modtime == modtime)
 464                 xflags |= XMIT_SAME_TIME;
 465         else
 466                 modtime = file->modtime;
 467
 468 #ifdef SUPPORT_HARD_LINKS
 469         if (tmp_dev != 0) {
 470                 if (protocol_version >= 30) {
 471                         struct ht_int64_node *np = idev_find(tmp_dev, tmp_ino);
 472                         first_hlink_ndx = (int32)(long)np->data - 1;
 473                         if (first_hlink_ndx < 0) {
 474                                 np->data = (void*)(long)(first_ndx + ndx + 1);
 475                                 xflags |= XMIT_HLINK_FIRST;
 476                         }
 477                         if (DEBUG_GTE(HLINK, 1)) {
 478                                 rprintf(FINFO, "found %s dev:inode %s:%s (#%ld)\n",
 479                                     xflags & XMIT_HLINK_FIRST ? "first" : "matching",
 480                                     big_num(tmp_dev, 0), big_num(tmp_ino, 0),
 481                                     (long)np->data - 1);
 482                         }
 483                 } else {
 484                         if (tmp_dev == dev) {
 485                                 if (protocol_version >= 28)
 486                                         xflags |= XMIT_SAME_DEV_pre30;
 487                         } else
 488                                 dev = tmp_dev;
 489                 }
 490                 xflags |= XMIT_HLINKED;
 491         }
 492 #endif
 493
 494         for (l1 = 0;
 495             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 496             l1++) {}
 497         l2 = strlen(fname+l1);
 498
 499         if (l1 > 0)
 500                 xflags |= XMIT_SAME_NAME;
 501         if (l2 > 255)
 502                 xflags |= XMIT_LONG_NAME;
 503
 504         /* We must make sure we don't send a zero flag byte or the
 505          * other end will terminate the flist transfer.  Note that
 506          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 507          * it's harmless way to add a bit to the first flag byte. */
 508         if (protocol_version >= 28) {
 509                 if (!xflags && !S_ISDIR(mode))
 510                         xflags |= XMIT_TOP_DIR;
 511                 if ((xflags & 0xFF00) || !xflags) {
 512                         xflags |= XMIT_EXTENDED_FLAGS;
 513                         write_shortint(f, xflags);
 514                 } else
 515                         write_byte(f, xflags);
 516         } else {
 517                 if (!(xflags & 0xFF))
 518                         xflags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 519                 write_byte(f, xflags);
 520         }
 521         if (xflags & XMIT_SAME_NAME)
 522                 write_byte(f, l1);
 523         if (xflags & XMIT_LONG_NAME)
 524                 write_varint30(f, l2);
 525         else
 526                 write_byte(f, l2);
 527         write_buf(f, fname + l1, l2);
 528
 529 #ifdef SUPPORT_HARD_LINKS
 530         if (first_hlink_ndx >= 0) {
 531                 write_varint(f, first_hlink_ndx);
 532                 if (first_hlink_ndx >= first_ndx) {
 533                         if (DEBUG_GTE(HLINK, 2))
 534                                 rprintf(FINFO, "sending abbr. entry\n");
 535                         goto the_end;
 536                 }
 537         }
 538 #endif
 539
 540         write_varlong30(f, F_LENGTH(file), 3);
 541         if (!(xflags & XMIT_SAME_TIME)) {
 542                 if (protocol_version >= 30)
 543                         write_varlong(f, modtime, 4);
 544                 else
 545                         write_int(f, modtime);
 546         }
 547         if (!(xflags & XMIT_SAME_MODE))
 548                 write_int(f, to_wire_mode(mode));
 549         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 550                 if (protocol_version < 30)
 551                         write_int(f, uid);
 552                 else {
 553                         write_varint(f, uid);
 554                         if (xflags & XMIT_USER_NAME_FOLLOWS) {
 555                                 int len = strlen(user_name);
 556                                 write_byte(f, len);
 557                                 write_buf(f, user_name, len);
 558                         }
 559                 }
 560         }
 561         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 562                 if (protocol_version < 30)
 563                         write_int(f, gid);
 564                 else {
 565                         write_varint(f, gid);
 566                         if (xflags & XMIT_GROUP_NAME_FOLLOWS) {
 567                                 int len = strlen(group_name);
 568                                 write_byte(f, len);
 569                                 write_buf(f, group_name, len);
 570                         }
 571                 }
 572         }
 573         if ((preserve_devices && IS_DEVICE(mode))
 574          || (preserve_specials && IS_SPECIAL(mode))) {
 575                 if (protocol_version < 28) {
 576                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 577                                 write_int(f, (int)rdev);
 578                 } else {
 579                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 580                                 write_varint30(f, major(rdev));
 581                         if (protocol_version >= 30)
 582                                 write_varint(f, minor(rdev));
 583                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 584                                 write_byte(f, minor(rdev));
 585                         else
 586                                 write_int(f, minor(rdev));
 587                 }
 588         }
 589
 590 #ifdef SUPPORT_LINKS
 591         if (preserve_links && S_ISLNK(mode)) {
 592                 const char *sl = F_SYMLINK(file);
 593                 int len = strlen(sl);
 594                 write_varint30(f, len);
 595                 write_buf(f, sl, len);
 596         }
 597 #endif
 598
 599 #ifdef SUPPORT_HARD_LINKS
 600         if (tmp_dev != 0 && protocol_version < 30) {
 601                 if (protocol_version < 26) {
 602                         /* 32-bit dev_t and ino_t */
 603                         write_int(f, (int32)dev);
 604                         write_int(f, (int32)tmp_ino);
 605                 } else {
 606                         /* 64-bit dev_t and ino_t */
 607                         if (!(xflags & XMIT_SAME_DEV_pre30))
 608                                 write_longint(f, dev);
 609                         write_longint(f, tmp_ino);
 610                 }
 611         }
 612 #endif
 613
 614         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 615                 const char *sum;
 616                 if (S_ISREG(mode))
 617                         sum = tmp_sum;
 618                 else {
 619                         /* Prior to 28, we sent a useless set of nulls. */
 620                         sum = empty_sum;
 621                 }
 622                 write_buf(f, sum, checksum_len);
 623         }
 624
 625 #ifdef SUPPORT_HARD_LINKS
 626   the_end:
 627 #endif
 628         strlcpy(lastname, fname, MAXPATHLEN);
 629
 630         if (S_ISREG(mode) || S_ISLNK(mode))
 631                 stats.total_size += F_LENGTH(file);
 632 }
 633
 634 static struct file_struct *recv_file_entry(struct file_list *flist,
 635                                            int xflags, int f)
 636 {
 637         static int64 modtime;
 638         static mode_t mode;
 639 #ifdef SUPPORT_HARD_LINKS
 640         static int64 dev;
 641 #endif
 642         static dev_t rdev;
 643         static uint32 rdev_major;
 644         static uid_t uid;
 645         static gid_t gid;
 646         static uint16 gid_flags;
 647         static char lastname[MAXPATHLEN], *lastdir;
 648         static int lastdir_depth, lastdir_len = -1;
 649         static unsigned int del_hier_name_len = 0;
 650         static int in_del_hier = 0;
 651         char thisname[MAXPATHLEN];
 652         unsigned int l1 = 0, l2 = 0;
 653         int alloc_len, basename_len, linkname_len;
 654         int extra_len = file_extra_cnt * EXTRA_LEN;
 655         int first_hlink_ndx = -1;
 656         int64 file_length;
 657         const char *basename;
 658         struct file_struct *file;
 659         alloc_pool_t *pool;
 660         char *bp;
 661
 662         if (xflags & XMIT_SAME_NAME)
 663                 l1 = read_byte(f);
 664
 665         if (xflags & XMIT_LONG_NAME)
 666                 l2 = read_varint30(f);
 667         else
 668                 l2 = read_byte(f);
 669
 670         if (l2 >= MAXPATHLEN - l1) {
 671                 rprintf(FERROR,
 672                         "overflow: xflags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 673                         xflags, l1, l2, lastname, who_am_i());
 674                 overflow_exit("recv_file_entry");
 675         }
 676
 677         strlcpy(thisname, lastname, l1 + 1);
 678         read_sbuf(f, &thisname[l1], l2);
 679         thisname[l1 + l2] = 0;
 680
 681         /* Abuse basename_len for a moment... */
 682         basename_len = strlcpy(lastname, thisname, MAXPATHLEN);
 683
 684 #ifdef ICONV_OPTION
 685         if (ic_recv != (iconv_t)-1) {
 686                 xbuf outbuf, inbuf;
 687
 688                 INIT_CONST_XBUF(outbuf, thisname);
 689                 INIT_XBUF(inbuf, lastname, basename_len, -1);
 690
 691                 if (iconvbufs(ic_recv, &inbuf, &outbuf, 0) < 0) {
 692                         io_error |= IOERR_GENERAL;
 693                         rprintf(FINFO,
 694                             "[%s] cannot convert filename: %s (%s)\n",
 695                             who_am_i(), lastname, strerror(errno));
 696                         outbuf.len = 0;
 697                 }
 698                 outbuf.buf[outbuf.len] = '\0';
 699         }
 700 #endif
 701
 702         if (*thisname)
 703                 clean_fname(thisname, 0);
 704
 705         if (sanitize_paths)
 706                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
 707
 708         if ((basename = strrchr(thisname, '/')) != NULL) {
 709                 int len = basename++ - thisname;
 710                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 711                         lastdir = new_array(char, len + 1);
 712                         memcpy(lastdir, thisname, len);
 713                         lastdir[len] = '\0';
 714                         lastdir_len = len;
 715                         lastdir_depth = count_dir_elements(lastdir);
 716                 }
 717         } else
 718                 basename = thisname;
 719         basename_len = strlen(basename) + 1; /* count the '\0' */
 720
 721 #ifdef SUPPORT_HARD_LINKS
 722         if (protocol_version >= 30
 723          && BITS_SETnUNSET(xflags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 724                 first_hlink_ndx = read_varint(f);
 725                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->ndx_start + flist->used) {
 726                         rprintf(FERROR,
 727                                 "hard-link reference out of range: %d (%d)\n",
 728                                 first_hlink_ndx, flist->ndx_start + flist->used);
 729                         exit_cleanup(RERR_PROTOCOL);
 730                 }
 731                 if (DEBUG_GTE(HLINK, 2)) {
 732                         rprintf(FINFO, "hard-link reference #%d (%sabbr.)\n",
 733                                 first_hlink_ndx,
 734                                 first_hlink_ndx >= flist->ndx_start ? "" : "un");
 735                 }
 736                 if (first_hlink_ndx >= flist->ndx_start) {
 737                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 738                         file_length = F_LENGTH(first);
 739                         modtime = first->modtime;
 740                         mode = first->mode;
 741                         if (preserve_uid)
 742                                 uid = F_OWNER(first);
 743                         if (preserve_gid)
 744                                 gid = F_GROUP(first);
 745                         if ((preserve_devices && IS_DEVICE(mode))
 746                          || (preserve_specials && IS_SPECIAL(mode))) {
 747                                 uint32 *devp = F_RDEV_P(first);
 748                                 rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 749                                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 750                         }
 751                         if (preserve_links && S_ISLNK(mode))
 752                                 linkname_len = strlen(F_SYMLINK(first)) + 1;
 753                         else
 754                                 linkname_len = 0;
 755                         goto create_object;
 756                 }
 757         }
 758 #endif
 759
 760         file_length = read_varlong30(f, 3);
 761         if (!(xflags & XMIT_SAME_TIME)) {
 762                 if (protocol_version >= 30) {
 763                         modtime = read_varlong(f, 4);
 764 #if SIZEOF_TIME_T < SIZEOF_INT64
 765                         if (!am_generator && (int64)(time_t)modtime != modtime) {
 766                                 rprintf(FERROR_XFER,
 767                                     "Time value of %s truncated on receiver.\n",
 768                                     lastname);
 769                         }
 770 #endif
 771                 } else
 772                         modtime = read_int(f);
 773         }
 774         if (!(xflags & XMIT_SAME_MODE))
 775                 mode = from_wire_mode(read_int(f));
 776
 777         if (chmod_modes && !S_ISLNK(mode))
 778                 mode = tweak_mode(mode, chmod_modes);
 779
 780         if (preserve_uid && !(xflags & XMIT_SAME_UID)) {
 781                 if (protocol_version < 30)
 782                         uid = (uid_t)read_int(f);
 783                 else {
 784                         uid = (uid_t)read_varint(f);
 785                         if (xflags & XMIT_USER_NAME_FOLLOWS)
 786                                 uid = recv_user_name(f, uid);
 787                         else if (inc_recurse && am_root && !numeric_ids)
 788                                 uid = match_uid(uid);
 789                 }
 790         }
 791         if (preserve_gid && !(xflags & XMIT_SAME_GID)) {
 792                 if (protocol_version < 30)
 793                         gid = (gid_t)read_int(f);
 794                 else {
 795                         gid = (gid_t)read_varint(f);
 796                         gid_flags = 0;
 797                         if (xflags & XMIT_GROUP_NAME_FOLLOWS)
 798                                 gid = recv_group_name(f, gid, &gid_flags);
 799                         else if (inc_recurse && (!am_root || !numeric_ids))
 800                                 gid = match_gid(gid, &gid_flags);
 801                 }
 802         }
 803
 804         if ((preserve_devices && IS_DEVICE(mode))
 805          || (preserve_specials && IS_SPECIAL(mode))) {
 806                 if (protocol_version < 28) {
 807                         if (!(xflags & XMIT_SAME_RDEV_pre28))
 808                                 rdev = (dev_t)read_int(f);
 809                 } else {
 810                         uint32 rdev_minor;
 811                         if (!(xflags & XMIT_SAME_RDEV_MAJOR))
 812                                 rdev_major = read_varint30(f);
 813                         if (protocol_version >= 30)
 814                                 rdev_minor = read_varint(f);
 815                         else if (xflags & XMIT_RDEV_MINOR_8_pre30)
 816                                 rdev_minor = read_byte(f);
 817                         else
 818                                 rdev_minor = read_int(f);
 819                         rdev = MAKEDEV(rdev_major, rdev_minor);
 820                 }
 821                 extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 822                 file_length = 0;
 823         } else if (protocol_version < 28)
 824                 rdev = MAKEDEV(0, 0);
 825
 826 #ifdef SUPPORT_LINKS
 827         if (preserve_links && S_ISLNK(mode)) {
 828                 linkname_len = read_varint30(f) + 1; /* count the '\0' */
 829                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 830                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 831                                 linkname_len - 1);
 832                         overflow_exit("recv_file_entry");
 833                 }
 834                 if (munge_symlinks)
 835                         linkname_len += SYMLINK_PREFIX_LEN;
 836         }
 837         else
 838 #endif
 839                 linkname_len = 0;
 840
 841 #ifdef SUPPORT_HARD_LINKS
 842   create_object:
 843         if (preserve_hard_links) {
 844                 if (protocol_version < 28 && S_ISREG(mode))
 845                         xflags |= XMIT_HLINKED;
 846                 if (xflags & XMIT_HLINKED)
 847                         extra_len += (inc_recurse+1) * EXTRA_LEN;
 848         }
 849 #endif
 850
 851 #ifdef SUPPORT_ACLS
 852         /* Directories need an extra int32 for the default ACL. */
 853         if (preserve_acls && S_ISDIR(mode))
 854                 extra_len += EXTRA_LEN;
 855 #endif
 856
 857         if (always_checksum && S_ISREG(mode))
 858                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 859
 860 #if SIZEOF_INT64 >= 8
 861         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 862                 extra_len += EXTRA_LEN;
 863 #endif
 864         if (file_length < 0) {
 865                 rprintf(FERROR, "Offset underflow: file-length is negative\n");
 866                 exit_cleanup(RERR_UNSUPPORTED);
 867         }
 868
 869         if (inc_recurse && S_ISDIR(mode)) {
 870                 if (one_file_system) {
 871                         /* Room to save the dir's device for -x */
 872                         extra_len += DEV_EXTRA_CNT * EXTRA_LEN;
 873                 }
 874                 pool = dir_flist->file_pool;
 875         } else
 876                 pool = flist->file_pool;
 877
 878 #if EXTRA_ROUNDING > 0
 879         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 880                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 881 #endif
 882
 883         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 884                   + linkname_len;
 885         bp = pool_alloc(pool, alloc_len, "recv_file_entry");
 886
 887         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 888         bp += extra_len;
 889         file = (struct file_struct *)bp;
 890         bp += FILE_STRUCT_LEN;
 891
 892         memcpy(bp, basename, basename_len);
 893
 894 #ifdef SUPPORT_HARD_LINKS
 895         if (xflags & XMIT_HLINKED)
 896                 file->flags |= FLAG_HLINKED;
 897 #endif
 898         file->modtime = (time_t)modtime;
 899         file->len32 = (uint32)file_length;
 900 #if SIZEOF_INT64 >= 8
 901         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 902 #if SIZEOF_CAPITAL_OFF_T < 8
 903                 rprintf(FERROR, "Offset overflow: attempted 64-bit file-length\n");
 904                 exit_cleanup(RERR_UNSUPPORTED);
 905 #else
 906                 file->flags |= FLAG_LENGTH64;
 907                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 908 #endif
 909         }
 910 #endif
 911         file->mode = mode;
 912         if (preserve_uid)
 913                 F_OWNER(file) = uid;
 914         if (preserve_gid) {
 915                 F_GROUP(file) = gid;
 916                 file->flags |= gid_flags;
 917         }
 918         if (unsort_ndx)
 919                 F_NDX(file) = flist->used + flist->ndx_start;
 920
 921         if (basename != thisname) {
 922                 file->dirname = lastdir;
 923                 F_DEPTH(file) = lastdir_depth + 1;
 924         } else
 925                 F_DEPTH(file) = 1;
 926
 927         if (S_ISDIR(mode)) {
 928                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 929                         F_DEPTH(file)--;
 930                 if (protocol_version >= 30) {
 931                         if (!(xflags & XMIT_NO_CONTENT_DIR)) {
 932                                 if (xflags & XMIT_TOP_DIR)
 933                                         file->flags |= FLAG_TOP_DIR;
 934                                 file->flags |= FLAG_CONTENT_DIR;
 935                         } else if (xflags & XMIT_TOP_DIR)
 936                                 file->flags |= FLAG_IMPLIED_DIR;
 937                 } else if (xflags & XMIT_TOP_DIR) {
 938                         in_del_hier = recurse;
 939                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 940                         if (relative_paths && del_hier_name_len > 2
 941                             && lastname[del_hier_name_len-1] == '.'
 942                             && lastname[del_hier_name_len-2] == '/')
 943                                 del_hier_name_len -= 2;
 944                         file->flags |= FLAG_TOP_DIR | FLAG_CONTENT_DIR;
 945                 } else if (in_del_hier) {
 946                         if (!relative_paths || !del_hier_name_len
 947                          || (l1 >= del_hier_name_len
 948                           && lastname[del_hier_name_len] == '/'))
 949                                 file->flags |= FLAG_CONTENT_DIR;
 950                         else
 951                                 in_del_hier = 0;
 952                 }
 953         }
 954
 955         if ((preserve_devices && IS_DEVICE(mode))
 956          || (preserve_specials && IS_SPECIAL(mode))) {
 957                 uint32 *devp = F_RDEV_P(file);
 958                 DEV_MAJOR(devp) = major(rdev);
 959                 DEV_MINOR(devp) = minor(rdev);
 960         }
 961
 962 #ifdef SUPPORT_LINKS
 963         if (linkname_len) {
 964                 bp += basename_len;
 965                 if (first_hlink_ndx >= flist->ndx_start) {
 966                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
 967                         memcpy(bp, F_SYMLINK(first), linkname_len);
 968                 } else if (munge_symlinks) {
 969                         strlcpy(bp, SYMLINK_PREFIX, linkname_len);
 970                         bp += SYMLINK_PREFIX_LEN;
 971                         linkname_len -= SYMLINK_PREFIX_LEN;
 972                         read_sbuf(f, bp, linkname_len - 1);
 973                 } else {
 974                         read_sbuf(f, bp, linkname_len - 1);
 975                         if (sanitize_paths)
 976                                 sanitize_path(bp, bp, "", lastdir_depth, SP_DEFAULT);
 977                 }
 978         }
 979 #endif
 980
 981 #ifdef SUPPORT_HARD_LINKS
 982         if (preserve_hard_links && xflags & XMIT_HLINKED) {
 983                 if (protocol_version >= 30) {
 984                         if (xflags & XMIT_HLINK_FIRST) {
 985                                 F_HL_GNUM(file) = flist->ndx_start + flist->used;
 986                         } else
 987                                 F_HL_GNUM(file) = first_hlink_ndx;
 988                 } else {
 989                         static int32 cnt = 0;
 990                         struct ht_int64_node *np;
 991                         int64 ino;
 992                         int32 ndx;
 993                         if (protocol_version < 26) {
 994                                 dev = read_int(f);
 995                                 ino = read_int(f);
 996                         } else {
 997                                 if (!(xflags & XMIT_SAME_DEV_pre30))
 998                                         dev = read_longint(f);
 999                                 ino = read_longint(f);
1000                         }
1001                         np = idev_find(dev, ino);
1002                         ndx = (int32)(long)np->data - 1;
1003                         if (ndx < 0) {
1004                                 ndx = cnt++;
1005                                 np->data = (void*)(long)cnt;
1006                         }
1007                         F_HL_GNUM(file) = ndx;
1008                 }
1009         }
1010 #endif
1011
1012         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
1013                 if (S_ISREG(mode))
1014                         bp = F_SUM(file);
1015                 else {
1016                         /* Prior to 28, we get a useless set of nulls. */
1017                         bp = tmp_sum;
1018                 }
1019                 if (first_hlink_ndx >= flist->ndx_start) {
1020                         struct file_struct *first = flist->files[first_hlink_ndx - flist->ndx_start];
1021                         memcpy(bp, F_SUM(first), checksum_len);
1022                 } else
1023                         read_buf(f, bp, checksum_len);
1024         }
1025
1026 #ifdef SUPPORT_ACLS
1027         if (preserve_acls && !S_ISLNK(mode))
1028                 receive_acl(file, f);
1029 #endif
1030 #ifdef SUPPORT_XATTRS
1031         if (preserve_xattrs)
1032                 receive_xattr(file, f );
1033 #endif
1034
1035         if (S_ISREG(mode) || S_ISLNK(mode))
1036                 stats.total_size += file_length;
1037
1038         return file;
1039 }
1040
1041 /* Create a file_struct for a named file by reading its stat() information
1042  * and performing extensive checks against global options.
1043  *
1044  * Returns a pointer to the new file struct, or NULL if there was an error
1045  * or this file should be excluded.
1046  *
1047  * Note: Any error (here or in send_file_name) that results in the omission of
1048  * an existent source file from the file list should set
1049  * "io_error |= IOERR_GENERAL" to avoid deletion of the file from the
1050  * destination if --delete is on. */
1051 struct file_struct *make_file(const char *fname, struct file_list *flist,
1052                               STRUCT_STAT *stp, int flags, int filter_level)
1053 {
1054         static char *lastdir;
1055         static int lastdir_len = -1;
1056         struct file_struct *file;
1057         char thisname[MAXPATHLEN];
1058         char linkname[MAXPATHLEN];
1059         int alloc_len, basename_len, linkname_len;
1060         int extra_len = file_extra_cnt * EXTRA_LEN;
1061         const char *basename;
1062         alloc_pool_t *pool;
1063         STRUCT_STAT st;
1064         char *bp;
1065
1066         if (strlcpy(thisname, fname, sizeof thisname) >= sizeof thisname) {
1067                 io_error |= IOERR_GENERAL;
1068                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
1069                 return NULL;
1070         }
1071         clean_fname(thisname, 0);
1072         if (sanitize_paths)
1073                 sanitize_path(thisname, thisname, "", 0, SP_DEFAULT);
1074
1075         if (stp && S_ISDIR(stp->st_mode)) {
1076                 st = *stp; /* Needed for "symlink/." with --relative. */
1077                 *linkname = '\0'; /* make IBM code checker happy */
1078         } else if (readlink_stat(thisname, &st, linkname) != 0) {
1079                 int save_errno = errno;
1080                 /* See if file is excluded before reporting an error. */
1081                 if (filter_level != NO_FILTERS
1082                  && (is_excluded(thisname, 0, filter_level)
1083                   || is_excluded(thisname, 1, filter_level))) {
1084                         if (ignore_perishable && save_errno != ENOENT)
1085                                 non_perishable_cnt++;
1086                         return NULL;
1087                 }
1088                 if (save_errno == ENOENT) {
1089 #ifdef SUPPORT_LINKS
1090                         /* When our options tell us to follow a symlink that
1091                          * points nowhere, tell the user about the symlink
1092                          * instead of giving a "vanished" message.  We only
1093                          * dereference a symlink if one of the --copy*links
1094                          * options was specified, so there's no need for the
1095                          * extra lstat() if one of these options isn't on. */
1096                         if ((copy_links || copy_unsafe_links || copy_dirlinks)
1097                          && x_lstat(thisname, &st, NULL) == 0
1098                          && S_ISLNK(st.st_mode)) {
1099                                 io_error |= IOERR_GENERAL;
1100                                 rprintf(FERROR_XFER, "symlink has no referent: %s\n",
1101                                         full_fname(thisname));
1102                         } else
1103 #endif
1104                         {
1105                                 enum logcode c = am_daemon && protocol_version < 28
1106                                                ? FERROR : FWARNING;
1107                                 io_error |= IOERR_VANISHED;
1108                                 rprintf(c, "file has vanished: %s\n",
1109                                         full_fname(thisname));
1110                         }
1111                 } else {
1112                         io_error |= IOERR_GENERAL;
1113                         rsyserr(FERROR_XFER, save_errno, "readlink %s failed",
1114                                 full_fname(thisname));
1115                 }
1116                 return NULL;
1117         }
1118
1119         if (filter_level == NO_FILTERS)
1120                 goto skip_filters;
1121
1122         if (S_ISDIR(st.st_mode)) {
1123                 if (!xfer_dirs) {
1124                         rprintf(FINFO, "skipping directory %s\n", thisname);
1125                         return NULL;
1126                 }
1127                 /* -x only affects dirs because we need to avoid recursing
1128                  * into a mount-point directory, not to avoid copying a
1129                  * symlinked file if -L (or similar) was specified. */
1130                 if (one_file_system && st.st_dev != filesystem_dev
1131                  && BITS_SETnUNSET(flags, FLAG_CONTENT_DIR, FLAG_TOP_DIR)) {
1132                         if (one_file_system > 1) {
1133                                 if (INFO_GTE(MOUNT, 1)) {
1134                                         rprintf(FINFO,
1135                                             "[%s] skipping mount-point dir %s\n",
1136                                             who_am_i(), thisname);
1137                                 }
1138                                 return NULL;
1139                         }
1140                         flags |= FLAG_MOUNT_DIR;
1141                         flags &= ~FLAG_CONTENT_DIR;
1142                 }
1143         } else
1144                 flags &= ~FLAG_CONTENT_DIR;
1145
1146         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
1147                 if (ignore_perishable)
1148                         non_perishable_cnt++;
1149                 return NULL;
1150         }
1151
1152         if (lp_ignore_nonreadable(module_id)) {
1153 #ifdef SUPPORT_LINKS
1154                 if (!S_ISLNK(st.st_mode))
1155 #endif
1156                         if (access(thisname, R_OK) != 0)
1157                                 return NULL;
1158         }
1159
1160   skip_filters:
1161
1162         /* Only divert a directory in the main transfer. */
1163         if (flist) {
1164                 if (flist->prev && S_ISDIR(st.st_mode)
1165                  && flags & FLAG_DIVERT_DIRS) {
1166                         /* Room for parent/sibling/next-child info. */
1167                         extra_len += DIRNODE_EXTRA_CNT * EXTRA_LEN;
1168                         if (relative_paths)
1169                                 extra_len += PTR_EXTRA_CNT * EXTRA_LEN;
1170                         pool = dir_flist->file_pool;
1171                 } else
1172                         pool = flist->file_pool;
1173         } else {
1174 #ifdef SUPPORT_ACLS
1175                 /* Directories need an extra int32 for the default ACL. */
1176                 if (preserve_acls && S_ISDIR(st.st_mode))
1177                         extra_len += EXTRA_LEN;
1178 #endif
1179                 pool = NULL;
1180         }
1181
1182         if (DEBUG_GTE(FLIST, 2)) {
1183                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
1184                         who_am_i(), thisname, filter_level);
1185         }
1186
1187         if ((basename = strrchr(thisname, '/')) != NULL) {
1188                 int len = basename++ - thisname;
1189                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
1190                         lastdir = new_array(char, len + 1);
1191                         memcpy(lastdir, thisname, len);
1192                         lastdir[len] = '\0';
1193                         lastdir_len = len;
1194                 }
1195         } else
1196                 basename = thisname;
1197         basename_len = strlen(basename) + 1; /* count the '\0' */
1198
1199 #ifdef SUPPORT_LINKS
1200         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1201 #else
1202         linkname_len = 0;
1203 #endif
1204
1205 #if SIZEOF_CAPITAL_OFF_T >= 8
1206         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1207                 extra_len += EXTRA_LEN;
1208 #endif
1209
1210 #if EXTRA_ROUNDING > 0
1211         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1212                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1213 #endif
1214
1215         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1216                   + linkname_len;
1217         if (pool)
1218                 bp = pool_alloc(pool, alloc_len, "make_file");
1219         else {
1220                 if (!(bp = new_array(char, alloc_len)))
1221                         out_of_memory("make_file");
1222         }
1223
1224         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1225         bp += extra_len;
1226         file = (struct file_struct *)bp;
1227         bp += FILE_STRUCT_LEN;
1228
1229         memcpy(bp, basename, basename_len);
1230
1231 #ifdef SUPPORT_HARD_LINKS
1232         if (preserve_hard_links && flist && flist->prev) {
1233                 if (protocol_version >= 28
1234                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1235                  : S_ISREG(st.st_mode)) {
1236                         tmp_dev = st.st_dev;
1237                         tmp_ino = st.st_ino;
1238                 } else
1239                         tmp_dev = 0;
1240         }
1241 #endif
1242
1243 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1244         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1245                 tmp_rdev = st.st_rdev;
1246                 st.st_size = 0;
1247         }
1248 #endif
1249
1250         file->flags = flags;
1251         file->modtime = st.st_mtime;
1252         file->len32 = (uint32)st.st_size;
1253 #if SIZEOF_CAPITAL_OFF_T >= 8
1254         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1255                 file->flags |= FLAG_LENGTH64;
1256                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1257         }
1258 #endif
1259         file->mode = st.st_mode;
1260         if (uid_ndx) /* Check uid_ndx instead of preserve_uid for del support */
1261                 F_OWNER(file) = st.st_uid;
1262         if (gid_ndx) /* Check gid_ndx instead of preserve_gid for del support */
1263                 F_GROUP(file) = st.st_gid;
1264
1265         if (basename != thisname)
1266                 file->dirname = lastdir;
1267
1268 #ifdef SUPPORT_LINKS
1269         if (linkname_len)
1270                 memcpy(bp + basename_len, linkname, linkname_len);
1271 #endif
1272
1273         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1274                 file_checksum(thisname, tmp_sum, st.st_size);
1275
1276         if (am_sender)
1277                 F_PATHNAME(file) = pathname;
1278         else if (!pool)
1279                 F_DEPTH(file) = extra_len / EXTRA_LEN;
1280
1281         /* This code is only used by the receiver when it is building
1282          * a list of files for a delete pass. */
1283         if (keep_dirlinks && linkname_len && flist) {
1284                 STRUCT_STAT st2;
1285                 int save_mode = file->mode;
1286                 file->mode = S_IFDIR; /* Find a directory with our name. */
1287                 if (flist_find(dir_flist, file) >= 0
1288                  && x_stat(thisname, &st2, NULL) == 0 && S_ISDIR(st2.st_mode)) {
1289                         file->modtime = st2.st_mtime;
1290                         file->len32 = 0;
1291                         file->mode = st2.st_mode;
1292                         if (uid_ndx)
1293                                 F_OWNER(file) = st2.st_uid;
1294                         if (gid_ndx)
1295                                 F_GROUP(file) = st2.st_gid;
1296                 } else
1297                         file->mode = save_mode;
1298         }
1299
1300         if (basename_len == 0+1) {
1301                 if (!pool)
1302                         unmake_file(file);
1303                 return NULL;
1304         }
1305
1306         if (unsort_ndx)
1307                 F_NDX(file) = dir_count;
1308
1309         return file;
1310 }
1311
1312 /* Only called for temporary file_struct entries created by make_file(). */
1313 void unmake_file(struct file_struct *file)
1314 {
1315         free(REQ_EXTRA(file, F_DEPTH(file)));
1316 }
1317
1318 static struct file_struct *send_file_name(int f, struct file_list *flist,
1319                                           const char *fname, STRUCT_STAT *stp,
1320                                           int flags, int filter_level)
1321 {
1322         struct file_struct *file;
1323
1324         file = make_file(fname, flist, stp, flags, filter_level);
1325         if (!file)
1326                 return NULL;
1327
1328         if (chmod_modes && !S_ISLNK(file->mode))
1329                 file->mode = tweak_mode(file->mode, chmod_modes);
1330
1331         if (f >= 0) {
1332                 char fbuf[MAXPATHLEN];
1333 #if defined SUPPORT_ACLS || defined SUPPORT_XATTRS
1334                 stat_x sx;
1335 #endif
1336
1337 #ifdef ICONV_OPTION
1338                 if (ic_send != (iconv_t)-1) {
1339                         xbuf outbuf, inbuf;
1340
1341                         INIT_CONST_XBUF(outbuf, fbuf);
1342
1343                         if (file->dirname) {
1344                                 INIT_XBUF_STRLEN(inbuf, (char*)file->dirname);
1345                                 outbuf.size -= 2; /* Reserve room for '/' & 1 more char. */
1346                                 if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0)
1347                                         goto convert_error;
1348                                 outbuf.size += 2;
1349                                 outbuf.buf[outbuf.len++] = '/';
1350                         }
1351
1352                         INIT_XBUF_STRLEN(inbuf, (char*)file->basename);
1353                         if (iconvbufs(ic_send, &inbuf, &outbuf, 0) < 0) {
1354                           convert_error:
1355                                 io_error |= IOERR_GENERAL;
1356                                 rprintf(FINFO,
1357                                     "[%s] cannot convert filename: %s (%s)\n",
1358                                     who_am_i(), f_name(file, fbuf), strerror(errno));
1359                                 return NULL;
1360                         }
1361                         outbuf.buf[outbuf.len] = '\0';
1362                 } else
1363 #endif
1364                         f_name(file, fbuf);
1365
1366 #ifdef SUPPORT_ACLS
1367                 if (preserve_acls && !S_ISLNK(file->mode)) {
1368                         sx.st.st_mode = file->mode;
1369                         sx.acc_acl = sx.def_acl = NULL;
1370                         if (get_acl(fname, &sx) < 0) {
1371                                 io_error |= IOERR_GENERAL;
1372                                 return NULL;
1373                         }
1374                 }
1375 #endif
1376 #ifdef SUPPORT_XATTRS
1377                 if (preserve_xattrs) {
1378                         sx.xattr = NULL;
1379                         if (get_xattr(fname, &sx) < 0) {
1380                                 io_error |= IOERR_GENERAL;
1381                                 return NULL;
1382                         }
1383                 }
1384 #endif
1385
1386                 send_file_entry(f, fbuf, file, flist->used, flist->ndx_start);
1387
1388 #ifdef SUPPORT_ACLS
1389                 if (preserve_acls && !S_ISLNK(file->mode)) {
1390                         send_acl(&sx, f);
1391                         free_acl(&sx);
1392                 }
1393 #endif
1394 #ifdef SUPPORT_XATTRS
1395                 if (preserve_xattrs) {
1396                         F_XATTR(file) = send_xattr(&sx, f);
1397                         free_xattr(&sx);
1398                 }
1399 #endif
1400         }
1401
1402         maybe_emit_filelist_progress(flist->used + flist_count_offset);
1403
1404         flist_expand(flist, 1);
1405         flist->files[flist->used++] = file;
1406
1407         return file;
1408 }
1409
1410 static void send_if_directory(int f, struct file_list *flist,
1411                               struct file_struct *file,
1412                               char *fbuf, unsigned int ol,
1413                               int flags)
1414 {
1415         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1416
1417         if (S_ISDIR(file->mode)
1418             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1419                 void *save_filters;
1420                 unsigned int len = strlen(fbuf);
1421                 if (len > 1 && fbuf[len-1] == '/')
1422                         fbuf[--len] = '\0';
1423                 if (len >= MAXPATHLEN - 1) {
1424                         io_error |= IOERR_GENERAL;
1425                         rprintf(FERROR_XFER, "skipping long-named directory: %s\n",
1426                                 full_fname(fbuf));
1427                         return;
1428                 }
1429                 save_filters = push_local_filters(fbuf, len);
1430                 send_directory(f, flist, fbuf, len, flags);
1431                 pop_local_filters(save_filters);
1432                 fbuf[ol] = '\0';
1433                 if (is_dot_dir)
1434                         fbuf[ol-1] = '.';
1435         }
1436 }
1437
1438 static int file_compare(const void *file1, const void *file2)
1439 {
1440         return f_name_cmp(*(struct file_struct **)file1,
1441                           *(struct file_struct **)file2);
1442 }
1443
1444 /* The guts of a merge-sort algorithm.  This was derived from the glibc
1445  * version, but I (Wayne) changed the merge code to do less copying and
1446  * to require only half the amount of temporary memory. */
1447 static void fsort_tmp(struct file_struct **fp, size_t num,
1448                       struct file_struct **tmp)
1449 {
1450         struct file_struct **f1, **f2, **t;
1451         size_t n1, n2;
1452
1453         n1 = num / 2;
1454         n2 = num - n1;
1455         f1 = fp;
1456         f2 = fp + n1;
1457
1458         if (n1 > 1)
1459                 fsort_tmp(f1, n1, tmp);
1460         if (n2 > 1)
1461                 fsort_tmp(f2, n2, tmp);
1462
1463         while (f_name_cmp(*f1, *f2) <= 0) {
1464                 if (!--n1)
1465                         return;
1466                 f1++;
1467         }
1468
1469         t = tmp;
1470         memcpy(t, f1, n1 * PTR_SIZE);
1471
1472         *f1++ = *f2++, n2--;
1473
1474         while (n1 > 0 && n2 > 0) {
1475                 if (f_name_cmp(*t, *f2) <= 0)
1476                         *f1++ = *t++, n1--;
1477                 else
1478                         *f1++ = *f2++, n2--;
1479         }
1480
1481         if (n1 > 0)
1482                 memcpy(f1, t, n1 * PTR_SIZE);
1483 }
1484
1485 /* This file-struct sorting routine makes sure that any identical names in
1486  * the file list stay in the same order as they were in the original list.
1487  * This is particularly vital in inc_recurse mode where we expect a sort
1488  * on the flist to match the exact order of a sort on the dir_flist. */
1489 static void fsort(struct file_struct **fp, size_t num)
1490 {
1491         if (num <= 1)
1492                 return;
1493
1494         if (use_qsort)
1495                 qsort(fp, num, PTR_SIZE, file_compare);
1496         else {
1497                 struct file_struct **tmp = new_array(struct file_struct *,
1498                                                      (num+1) / 2);
1499                 fsort_tmp(fp, num, tmp);
1500                 free(tmp);
1501         }
1502 }
1503
1504 /* We take an entire set of sibling dirs from the sorted flist and link them
1505  * into the tree, setting the appropriate parent/child/sibling pointers. */
1506 static void add_dirs_to_tree(int parent_ndx, struct file_list *from_flist,
1507                              int dir_cnt)
1508 {
1509         int i;
1510         int32 *dp = NULL;
1511         int32 *parent_dp = parent_ndx < 0 ? NULL
1512                          : F_DIR_NODE_P(dir_flist->sorted[parent_ndx]);
1513
1514         flist_expand(dir_flist, dir_cnt);
1515         dir_flist->sorted = dir_flist->files;
1516
1517         for (i = 0; dir_cnt; i++) {
1518                 struct file_struct *file = from_flist->sorted[i];
1519
1520                 if (!S_ISDIR(file->mode))
1521                         continue;
1522
1523                 dir_flist->files[dir_flist->used++] = file;
1524                 dir_cnt--;
1525
1526                 if (file->basename[0] == '.' && file->basename[1] == '\0')
1527                         continue;
1528
1529                 if (dp)
1530                         DIR_NEXT_SIBLING(dp) = dir_flist->used - 1;
1531                 else if (parent_dp)
1532                         DIR_FIRST_CHILD(parent_dp) = dir_flist->used - 1;
1533                 else
1534                         send_dir_ndx = dir_flist->used - 1;
1535
1536                 dp = F_DIR_NODE_P(file);
1537                 DIR_PARENT(dp) = parent_ndx;
1538                 DIR_FIRST_CHILD(dp) = -1;
1539         }
1540         if (dp)
1541                 DIR_NEXT_SIBLING(dp) = -1;
1542 }
1543
1544 /* This function is normally called by the sender, but the receiving side also
1545  * calls it from get_dirlist() with f set to -1 so that we just construct the
1546  * file list in memory without sending it over the wire.  Also, get_dirlist()
1547  * might call this with f set to -2, which also indicates that local filter
1548  * rules should be ignored. */
1549 static void send_directory(int f, struct file_list *flist, char *fbuf, int len,
1550                            int flags)
1551 {
1552         struct dirent *di;
1553         unsigned remainder;
1554         char *p;
1555         DIR *d;
1556         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1557         int start = flist->used;
1558         int filter_level = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1559
1560         assert(flist != NULL);
1561
1562         if (!(d = opendir(fbuf))) {
1563                 io_error |= IOERR_GENERAL;
1564                 rsyserr(FERROR_XFER, errno, "opendir %s failed", full_fname(fbuf));
1565                 return;
1566         }
1567
1568         p = fbuf + len;
1569         if (len != 1 || *fbuf != '/')
1570                 *p++ = '/';
1571         *p = '\0';
1572         remainder = MAXPATHLEN - (p - fbuf);
1573
1574         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1575                 char *dname = d_name(di);
1576                 if (dname[0] == '.' && (dname[1] == '\0'
1577                     || (dname[1] == '.' && dname[2] == '\0')))
1578                         continue;
1579                 if (strlcpy(p, dname, remainder) >= remainder) {
1580                         io_error |= IOERR_GENERAL;
1581                         rprintf(FINFO,
1582                                 "cannot send long-named file %s\n",
1583                                 full_fname(fbuf));
1584                         continue;
1585                 }
1586                 if (dname[0] == '\0') {
1587                         io_error |= IOERR_GENERAL;
1588                         rprintf(FINFO,
1589                                 "cannot send file with empty name in %s\n",
1590                                 full_fname(fbuf));
1591                         continue;
1592                 }
1593
1594                 send_file_name(f, flist, fbuf, NULL, flags, filter_level);
1595         }
1596
1597         fbuf[len] = '\0';
1598
1599         if (errno) {
1600                 io_error |= IOERR_GENERAL;
1601                 rsyserr(FERROR_XFER, errno, "readdir(%s)", full_fname(fbuf));
1602         }
1603
1604         closedir(d);
1605
1606         if (f >= 0 && recurse && !divert_dirs) {
1607                 int i, end = flist->used - 1;
1608                 /* send_if_directory() bumps flist->used, so use "end". */
1609                 for (i = start; i <= end; i++)
1610                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1611         }
1612 }
1613
1614 static void send_implied_dirs(int f, struct file_list *flist, char *fname,
1615                               char *start, char *limit, int flags, char name_type)
1616 {
1617         static char lastpath[MAXPATHLEN] = "";
1618         static int lastpath_len = 0;
1619         static struct file_struct *lastpath_struct = NULL;
1620         struct file_struct *file;
1621         item_list *relname_list;
1622         relnamecache **rnpp;
1623         int len, need_new_dir, depth = 0;
1624         struct filter_list_struct save_filter_list = filter_list;
1625
1626         flags = (flags | FLAG_IMPLIED_DIR) & ~(FLAG_TOP_DIR | FLAG_CONTENT_DIR);
1627         filter_list.head = filter_list.tail = NULL; /* Don't filter implied dirs. */
1628
1629         if (inc_recurse) {
1630                 if (lastpath_struct && F_PATHNAME(lastpath_struct) == pathname
1631                  && lastpath_len == limit - fname
1632                  && strncmp(lastpath, fname, lastpath_len) == 0)
1633                         need_new_dir = 0;
1634                 else
1635                         need_new_dir = 1;
1636         } else {
1637                 char *tp = fname, *lp = lastpath;
1638                 /* Skip any initial directories in our path that we
1639                  * have in common with lastpath. */
1640                 assert(start == fname);
1641                 for ( ; ; tp++, lp++) {
1642                         if (tp == limit) {
1643                                 if (*lp == '/' || *lp == '\0')
1644                                         goto done;
1645                                 break;
1646                         }
1647                         if (*lp != *tp)
1648                                 break;
1649                         if (*tp == '/') {
1650                                 start = tp;
1651                                 depth++;
1652                         }
1653                 }
1654                 need_new_dir = 1;
1655         }
1656
1657         if (need_new_dir) {
1658                 int save_copy_links = copy_links;
1659                 int save_xfer_dirs = xfer_dirs;
1660                 char *slash;
1661
1662                 copy_links = xfer_dirs = 1;
1663
1664                 *limit = '\0';
1665
1666                 for (slash = start; (slash = strchr(slash+1, '/')) != NULL; ) {
1667                         *slash = '\0';
1668                         file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1669                         depth++;
1670                         if (!inc_recurse && file && S_ISDIR(file->mode))
1671                                 change_local_filter_dir(fname, strlen(fname), depth);
1672                         *slash = '/';
1673                 }
1674
1675                 file = send_file_name(f, flist, fname, NULL, flags, ALL_FILTERS);
1676                 if (inc_recurse) {
1677                         if (file && !S_ISDIR(file->mode))
1678                                 file = NULL;
1679                         lastpath_struct = file;
1680                 } else if (file && S_ISDIR(file->mode))
1681                         change_local_filter_dir(fname, strlen(fname), ++depth);
1682
1683                 strlcpy(lastpath, fname, sizeof lastpath);
1684                 lastpath_len = limit - fname;
1685
1686                 *limit = '/';
1687
1688                 copy_links = save_copy_links;
1689                 xfer_dirs = save_xfer_dirs;
1690
1691                 if (!inc_recurse)
1692                         goto done;
1693         }
1694
1695         if (!lastpath_struct)
1696                 goto done; /* dir must have vanished */
1697
1698         len = strlen(limit+1);
1699         memcpy(&relname_list, F_DIR_RELNAMES_P(lastpath_struct), sizeof relname_list);
1700         if (!relname_list) {
1701                 if (!(relname_list = new0(item_list)))
1702                         out_of_memory("send_implied_dirs");
1703                 memcpy(F_DIR_RELNAMES_P(lastpath_struct), &relname_list, sizeof relname_list);
1704         }
1705         rnpp = EXPAND_ITEM_LIST(relname_list, relnamecache *, 32);
1706         if (!(*rnpp = (relnamecache*)new_array(char, sizeof (relnamecache) + len)))
1707                 out_of_memory("send_implied_dirs");
1708         (*rnpp)->name_type = name_type;
1709         strlcpy((*rnpp)->fname, limit+1, len + 1);
1710
1711 done:
1712         filter_list = save_filter_list;
1713 }
1714
1715 static void send1extra(int f, struct file_struct *file, struct file_list *flist)
1716 {
1717         char fbuf[MAXPATHLEN];
1718         item_list *relname_list;
1719         int len, dlen, flags = FLAG_DIVERT_DIRS | FLAG_CONTENT_DIR;
1720         size_t j;
1721
1722         f_name(file, fbuf);
1723         dlen = strlen(fbuf);
1724
1725         if (!change_pathname(file, NULL, 0))
1726                 exit_cleanup(RERR_FILESELECT);
1727
1728         change_local_filter_dir(fbuf, dlen, send_dir_depth);
1729
1730         if (file->flags & FLAG_CONTENT_DIR) {
1731                 if (one_file_system) {
1732                         STRUCT_STAT st;
1733                         if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1734                                 io_error |= IOERR_GENERAL;
1735                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1736                                         full_fname(fbuf));
1737                                 return;
1738                         }
1739                         filesystem_dev = st.st_dev;
1740                 }
1741                 send_directory(f, flist, fbuf, dlen, flags);
1742         }
1743
1744         if (!relative_paths)
1745                 return;
1746
1747         memcpy(&relname_list, F_DIR_RELNAMES_P(file), sizeof relname_list);
1748         if (!relname_list)
1749                 return;
1750
1751         for (j = 0; j < relname_list->count; j++) {
1752                 char *slash;
1753                 relnamecache *rnp = ((relnamecache**)relname_list->items)[j];
1754                 char name_type = rnp->name_type;
1755
1756                 fbuf[dlen] = '/';
1757                 len = strlcpy(fbuf + dlen + 1, rnp->fname, sizeof fbuf - dlen - 1);
1758                 free(rnp);
1759                 if (len >= (int)sizeof fbuf)
1760                         continue; /* Impossible... */
1761
1762                 slash = strchr(fbuf+dlen+1, '/');
1763                 if (slash) {
1764                         send_implied_dirs(f, flist, fbuf, fbuf+dlen+1, slash, flags, name_type);
1765                         continue;
1766                 }
1767
1768                 if (name_type != NORMAL_NAME) {
1769                         STRUCT_STAT st;
1770                         if (link_stat(fbuf, &st, 1) != 0) {
1771                                 io_error |= IOERR_GENERAL;
1772                                 rsyserr(FERROR_XFER, errno, "link_stat %s failed",
1773                                         full_fname(fbuf));
1774                                 continue;
1775                         }
1776                         send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR | flags, ALL_FILTERS);
1777                 } else
1778                         send_file_name(f, flist, fbuf, NULL, FLAG_TOP_DIR | flags, ALL_FILTERS);
1779         }
1780
1781         free(relname_list);
1782 }
1783
1784 void send_extra_file_list(int f, int at_least)
1785 {
1786         struct file_list *flist;
1787         int64 start_write;
1788         uint16 prev_flags;
1789         int old_cnt, save_io_error = io_error;
1790
1791         if (flist_eof)
1792                 return;
1793
1794         /* Keep sending data until we have the requested number of
1795          * files in the upcoming file-lists. */
1796         old_cnt = cur_flist->used;
1797         for (flist = first_flist; flist != cur_flist; flist = flist->next)
1798                 old_cnt += flist->used;
1799         while (file_total - old_cnt < at_least) {
1800                 struct file_struct *file = dir_flist->sorted[send_dir_ndx];
1801                 int dir_ndx, dstart = dir_count;
1802                 const char *pathname = F_PATHNAME(file);
1803                 int32 *dp;
1804
1805                 flist = flist_new(0, "send_extra_file_list");
1806                 start_write = stats.total_written;
1807
1808                 if (unsort_ndx)
1809                         dir_ndx = F_NDX(file);
1810                 else
1811                         dir_ndx = send_dir_ndx;
1812                 write_ndx(f, NDX_FLIST_OFFSET - dir_ndx);
1813                 flist->parent_ndx = dir_ndx;
1814
1815                 send1extra(f, file, flist);
1816                 prev_flags = file->flags;
1817                 dp = F_DIR_NODE_P(file);
1818
1819                 /* If there are any duplicate directory names that follow, we
1820                  * send all the dirs together in one file-list.  The dir_flist
1821                  * tree links all the child subdirs onto the last dup dir. */
1822                 while ((dir_ndx = DIR_NEXT_SIBLING(dp)) >= 0
1823                     && dir_flist->sorted[dir_ndx]->flags & FLAG_DUPLICATE) {
1824                         send_dir_ndx = dir_ndx;
1825                         file = dir_flist->sorted[dir_ndx];
1826                         /* Try to avoid some duplicate scanning of identical dirs. */
1827                         if (F_PATHNAME(file) == pathname && prev_flags & FLAG_CONTENT_DIR)
1828                                 file->flags &= ~FLAG_CONTENT_DIR;
1829                         send1extra(f, file, flist);
1830                         prev_flags = file->flags;
1831                         dp = F_DIR_NODE_P(file);
1832                 }
1833
1834                 write_byte(f, 0);
1835
1836                 if (need_unsorted_flist) {
1837                         if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
1838                                 out_of_memory("send_extra_file_list");
1839                         memcpy(flist->sorted, flist->files,
1840                                flist->used * sizeof (struct file_struct*));
1841                 } else
1842                         flist->sorted = flist->files;
1843
1844                 flist_sort_and_clean(flist, 0);
1845
1846                 add_dirs_to_tree(send_dir_ndx, flist, dir_count - dstart);
1847                 flist_done_allocating(flist);
1848
1849                 file_total += flist->used;
1850                 stats.flist_size += stats.total_written - start_write;
1851                 stats.num_files += flist->used;
1852                 if (DEBUG_GTE(FLIST, 3))
1853                         output_flist(flist);
1854
1855                 if (DIR_FIRST_CHILD(dp) >= 0) {
1856                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1857                         send_dir_depth++;
1858                 } else {
1859                         while (DIR_NEXT_SIBLING(dp) < 0) {
1860                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1861                                         write_ndx(f, NDX_FLIST_EOF);
1862                                         flist_eof = 1;
1863                                         change_local_filter_dir(NULL, 0, 0);
1864                                         goto finish;
1865                                 }
1866                                 send_dir_depth--;
1867                                 file = dir_flist->sorted[send_dir_ndx];
1868                                 dp = F_DIR_NODE_P(file);
1869                         }
1870                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1871                 }
1872         }
1873
1874   finish:
1875         if (io_error != save_io_error && !ignore_errors)
1876                 send_msg_int(MSG_IO_ERROR, io_error);
1877 }
1878
1879 struct file_list *send_file_list(int f, int argc, char *argv[])
1880 {
1881         static const char *lastdir;
1882         static int lastdir_len = -1;
1883         int len, dirlen;
1884         STRUCT_STAT st;
1885         char *p, *dir;
1886         struct file_list *flist;
1887         struct timeval start_tv, end_tv;
1888         int64 start_write;
1889         int use_ff_fd = 0;
1890         int disable_buffering;
1891         int flags = recurse ? FLAG_CONTENT_DIR : 0;
1892         int reading_remotely = filesfrom_host != NULL;
1893         int rl_flags = (reading_remotely ? 0 : RL_DUMP_COMMENTS)
1894 #ifdef ICONV_OPTION
1895                      | (filesfrom_convert ? RL_CONVERT : 0)
1896 #endif
1897                      | (eol_nulls || reading_remotely ? RL_EOL_NULLS : 0);
1898         int implied_dot_dir = 0;
1899
1900         rprintf(FLOG, "building file list\n");
1901         if (show_filelist_p())
1902                 start_filelist_progress("building file list");
1903         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server)
1904                 rprintf(FCLIENT, "sending incremental file list\n");
1905
1906         start_write = stats.total_written;
1907         gettimeofday(&start_tv, NULL);
1908
1909         if (!orig_dir)
1910                 orig_dir = strdup(curr_dir);
1911
1912         if (relative_paths && protocol_version >= 30)
1913                 implied_dirs = 1; /* We send flagged implied dirs */
1914
1915 #ifdef SUPPORT_HARD_LINKS
1916         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1917                 init_hard_links();
1918 #endif
1919
1920         flist = cur_flist = flist_new(0, "send_file_list");
1921         if (inc_recurse) {
1922                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1923                 flags |= FLAG_DIVERT_DIRS;
1924         } else
1925                 dir_flist = cur_flist;
1926
1927         disable_buffering = io_start_buffering_out(f);
1928         if (filesfrom_fd >= 0) {
1929                 if (argv[0] && !change_dir(argv[0], CD_NORMAL)) {
1930                         rsyserr(FERROR_XFER, errno, "change_dir %s failed",
1931                                 full_fname(argv[0]));
1932                         exit_cleanup(RERR_FILESELECT);
1933                 }
1934                 use_ff_fd = 1;
1935         }
1936
1937         while (1) {
1938                 char fbuf[MAXPATHLEN], *fn, name_type;
1939
1940                 if (use_ff_fd) {
1941                         if (read_line(filesfrom_fd, fbuf, sizeof fbuf, rl_flags) == 0)
1942                                 break;
1943                         sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1944                 } else {
1945                         if (argc-- == 0)
1946                                 break;
1947                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1948                         if (sanitize_paths)
1949                                 sanitize_path(fbuf, fbuf, "", 0, SP_KEEP_DOT_DIRS);
1950                 }
1951
1952                 len = strlen(fbuf);
1953                 if (relative_paths) {
1954                         /* We clean up fbuf below. */
1955                         name_type = NORMAL_NAME;
1956                 } else if (!len || fbuf[len - 1] == '/') {
1957                         if (len == 2 && fbuf[0] == '.') {
1958                                 /* Turn "./" into just "." rather than "./." */
1959                                 fbuf[--len] = '\0';
1960                         } else {
1961                                 if (len + 1 >= MAXPATHLEN)
1962                                         overflow_exit("send_file_list");
1963                                 fbuf[len++] = '.';
1964                                 fbuf[len] = '\0';
1965                         }
1966                         name_type = DOTDIR_NAME;
1967                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1968                     && (len == 2 || fbuf[len-3] == '/')) {
1969                         if (len + 2 >= MAXPATHLEN)
1970                                 overflow_exit("send_file_list");
1971                         fbuf[len++] = '/';
1972                         fbuf[len++] = '.';
1973                         fbuf[len] = '\0';
1974                         name_type = DOTDIR_NAME;
1975                 } else if (fbuf[len-1] == '.' && (len == 1 || fbuf[len-2] == '/'))
1976                         name_type = DOTDIR_NAME;
1977                 else
1978                         name_type = NORMAL_NAME;
1979
1980                 dir = NULL;
1981
1982                 if (!relative_paths) {
1983                         p = strrchr(fbuf, '/');
1984                         if (p) {
1985                                 *p = '\0';
1986                                 if (p == fbuf)
1987                                         dir = "/";
1988                                 else
1989                                         dir = fbuf;
1990                                 len -= p - fbuf + 1;
1991                                 fn = p + 1;
1992                         } else
1993                                 fn = fbuf;
1994                 } else {
1995                         if ((p = strstr(fbuf, "/./")) != NULL) {
1996                                 *p = '\0';
1997                                 if (p == fbuf)
1998                                         dir = "/";
1999                                 else {
2000                                         dir = fbuf;
2001                                         clean_fname(dir, 0);
2002                                 }
2003                                 fn = p + 3;
2004                                 while (*fn == '/')
2005                                         fn++;
2006                                 if (!*fn)
2007                                         *--fn = '\0'; /* ensure room for '.' */
2008                         } else
2009                                 fn = fbuf;
2010                         /* A leading ./ can be used in relative mode to affect
2011                          * the dest dir without its name being in the path. */
2012                         if (*fn == '.' && fn[1] == '/' && !implied_dot_dir) {
2013                                 send_file_name(f, flist, ".", NULL,
2014                                     (flags | FLAG_IMPLIED_DIR) & ~FLAG_CONTENT_DIR,
2015                                     ALL_FILTERS);
2016                                 implied_dot_dir = 1;
2017                         }
2018                         len = clean_fname(fn, CFN_KEEP_TRAILING_SLASH
2019                                             | CFN_DROP_TRAILING_DOT_DIR);
2020                         if (len == 1) {
2021                                 if (fn[0] == '/') {
2022                                         fn = "/.";
2023                                         len = 2;
2024                                         name_type = DOTDIR_NAME;
2025                                 } else if (fn[0] == '.')
2026                                         name_type = DOTDIR_NAME;
2027                         } else if (fn[len-1] == '/') {
2028                                 fn[--len] = '\0';
2029                                 if (len == 1 && *fn == '.')
2030                                         name_type = DOTDIR_NAME;
2031                                 else
2032                                         name_type = SLASH_ENDING_NAME;
2033                         }
2034                         /* Reject a ".." dir in the active part of the path. */
2035                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
2036                                 if ((p[2] == '/' || p[2] == '\0')
2037                                  && (p == fn || p[-1] == '/')) {
2038                                         rprintf(FERROR,
2039                                             "found \"..\" dir in relative path: %s\n",
2040                                             fn);
2041                                         exit_cleanup(RERR_SYNTAX);
2042                                 }
2043                         }
2044                 }
2045
2046                 if (!*fn) {
2047                         len = 1;
2048                         fn = ".";
2049                         name_type = DOTDIR_NAME;
2050                 }
2051
2052                 dirlen = dir ? strlen(dir) : 0;
2053                 if (dirlen != lastdir_len || memcmp(lastdir, dir, dirlen) != 0) {
2054                         if (!change_pathname(NULL, dir, -dirlen))
2055                                 continue;
2056                         lastdir = pathname;
2057                         lastdir_len = pathname_len;
2058                 } else if (!change_pathname(NULL, lastdir, lastdir_len))
2059                         continue;
2060
2061                 if (fn != fbuf)
2062                         memmove(fbuf, fn, len + 1);
2063
2064                 if (link_stat(fbuf, &st, copy_dirlinks || name_type != NORMAL_NAME) != 0
2065                  || (name_type != DOTDIR_NAME && is_daemon_excluded(fbuf, S_ISDIR(st.st_mode)))
2066                  || (relative_paths && path_is_daemon_excluded(fbuf, 1))) {
2067                         io_error |= IOERR_GENERAL;
2068                         rsyserr(FERROR_XFER, errno, "link_stat %s failed",
2069                                 full_fname(fbuf));
2070                         continue;
2071                 }
2072
2073                 /* A dot-dir should not be excluded! */
2074                 if (name_type != DOTDIR_NAME
2075                  && is_excluded(fbuf, S_ISDIR(st.st_mode) != 0, ALL_FILTERS))
2076                         continue;
2077
2078                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
2079                         rprintf(FINFO, "skipping directory %s\n", fbuf);
2080                         continue;
2081                 }
2082
2083                 if (inc_recurse && relative_paths && *fbuf) {
2084                         if ((p = strchr(fbuf+1, '/')) != NULL) {
2085                                 if (p - fbuf == 1 && *fbuf == '.') {
2086                                         if ((fn = strchr(p+1, '/')) != NULL)
2087                                                 p = fn;
2088                                 } else
2089                                         fn = p;
2090                                 send_implied_dirs(f, flist, fbuf, fbuf, p, flags, name_type);
2091                                 if (fn == p)
2092                                         continue;
2093                         }
2094                 } else if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
2095                         /* Send the implied directories at the start of the
2096                          * source spec, so we get their permissions right. */
2097                         send_implied_dirs(f, flist, fbuf, fbuf, p, flags, 0);
2098                 }
2099
2100                 if (one_file_system)
2101                         filesystem_dev = st.st_dev;
2102
2103                 if (recurse || (xfer_dirs && name_type != NORMAL_NAME)) {
2104                         struct file_struct *file;
2105                         file = send_file_name(f, flist, fbuf, &st,
2106                                               FLAG_TOP_DIR | FLAG_CONTENT_DIR | flags,
2107                                               NO_FILTERS);
2108                         if (!file)
2109                                 continue;
2110                         if (inc_recurse) {
2111                                 if (name_type == DOTDIR_NAME) {
2112                                         if (send_dir_depth < 0) {
2113                                                 send_dir_depth = 0;
2114                                                 change_local_filter_dir(fbuf, len, send_dir_depth);
2115                                         }
2116                                         send_directory(f, flist, fbuf, len, flags);
2117                                 }
2118                         } else
2119                                 send_if_directory(f, flist, file, fbuf, len, flags);
2120                 } else
2121                         send_file_name(f, flist, fbuf, &st, flags, NO_FILTERS);
2122         }
2123
2124         gettimeofday(&end_tv, NULL);
2125         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2126                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2127         if (stats.flist_buildtime == 0)
2128                 stats.flist_buildtime = 1;
2129         start_tv = end_tv;
2130
2131         write_byte(f, 0); /* Indicate end of file list */
2132
2133 #ifdef SUPPORT_HARD_LINKS
2134         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
2135                 idev_destroy();
2136 #endif
2137
2138         if (show_filelist_p())
2139                 finish_filelist_progress(flist);
2140
2141         gettimeofday(&end_tv, NULL);
2142         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
2143                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
2144
2145         /* When converting names, both sides keep an unsorted file-list array
2146          * because the names will differ on the sending and receiving sides
2147          * (both sides will use the unsorted index number for each item). */
2148
2149         /* Sort the list without removing any duplicates.  This allows the
2150          * receiving side to ask for whatever name it kept.  For incremental
2151          * recursion mode, the sender marks duplicate dirs so that it can
2152          * send them together in a single file-list. */
2153         if (need_unsorted_flist) {
2154                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2155                         out_of_memory("send_file_list");
2156                 memcpy(flist->sorted, flist->files,
2157                        flist->used * sizeof (struct file_struct*));
2158         } else
2159                 flist->sorted = flist->files;
2160         flist_sort_and_clean(flist, 0);
2161         file_total += flist->used;
2162
2163         if (numeric_ids <= 0 && !inc_recurse)
2164                 send_id_list(f);
2165
2166         /* send the io_error flag */
2167         if (protocol_version < 30)
2168                 write_int(f, ignore_errors ? 0 : io_error);
2169         else if (io_error && !ignore_errors)
2170                 send_msg_int(MSG_IO_ERROR, io_error);
2171
2172         if (disable_buffering)
2173                 io_end_buffering_out();
2174
2175         stats.flist_size = stats.total_written - start_write;
2176         stats.num_files = flist->used;
2177
2178         if (DEBUG_GTE(FLIST, 3))
2179                 output_flist(flist);
2180
2181         if (DEBUG_GTE(FLIST, 2))
2182                 rprintf(FINFO, "send_file_list done\n");
2183
2184         if (inc_recurse) {
2185                 send_dir_depth = 1;
2186                 add_dirs_to_tree(-1, flist, dir_count);
2187                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2188                         flist->parent_ndx = -1;
2189                 flist_done_allocating(flist);
2190                 if (send_dir_ndx < 0) {
2191                         write_ndx(f, NDX_FLIST_EOF);
2192                         flist_eof = 1;
2193                 }
2194                 else if (file_total == 1) {
2195                         /* If we're creating incremental file-lists and there
2196                          * was just 1 item in the first file-list, send 1 more
2197                          * file-list to check if this is a 1-file xfer. */
2198                         send_extra_file_list(f, 1);
2199                 }
2200         }
2201
2202         return flist;
2203 }
2204
2205 struct file_list *recv_file_list(int f)
2206 {
2207         struct file_list *flist;
2208         int dstart, flags;
2209         int64 start_read;
2210
2211         if (!first_flist)
2212                 rprintf(FLOG, "receiving file list\n");
2213         if (show_filelist_p())
2214                 start_filelist_progress("receiving file list");
2215         else if (inc_recurse && INFO_GTE(FLIST, 1) && !am_server && !first_flist)
2216                 rprintf(FCLIENT, "receiving incremental file list\n");
2217
2218         start_read = stats.total_read;
2219
2220 #ifdef SUPPORT_HARD_LINKS
2221         if (preserve_hard_links && !first_flist)
2222                 init_hard_links();
2223 #endif
2224
2225         flist = flist_new(0, "recv_file_list");
2226
2227         if (inc_recurse) {
2228                 if (flist->ndx_start == 1)
2229                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
2230                 dstart = dir_flist->used;
2231         } else {
2232                 dir_flist = flist;
2233                 dstart = 0;
2234         }
2235
2236         while ((flags = read_byte(f)) != 0) {
2237                 struct file_struct *file;
2238
2239                 flist_expand(flist, 1);
2240
2241                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
2242                         flags |= read_byte(f) << 8;
2243                 file = recv_file_entry(flist, flags, f);
2244
2245                 if (inc_recurse && S_ISDIR(file->mode)) {
2246                         flist_expand(dir_flist, 1);
2247                         dir_flist->files[dir_flist->used++] = file;
2248                 }
2249
2250                 flist->files[flist->used++] = file;
2251
2252                 maybe_emit_filelist_progress(flist->used);
2253
2254                 if (DEBUG_GTE(FLIST, 2)) {
2255                         rprintf(FINFO, "recv_file_name(%s)\n",
2256                                 f_name(file, NULL));
2257                 }
2258         }
2259         file_total += flist->used;
2260
2261         if (DEBUG_GTE(FLIST, 2))
2262                 rprintf(FINFO, "received %d names\n", flist->used);
2263
2264         if (show_filelist_p())
2265                 finish_filelist_progress(flist);
2266
2267         if (need_unsorted_flist) {
2268                 /* Create an extra array of index pointers that we can sort for
2269                  * the generator's use (for wading through the files in sorted
2270                  * order and for calling flist_find()).  We keep the "files"
2271                  * list unsorted for our exchange of index numbers with the
2272                  * other side (since their names may not sort the same). */
2273                 if (!(flist->sorted = new_array(struct file_struct *, flist->used)))
2274                         out_of_memory("recv_file_list");
2275                 memcpy(flist->sorted, flist->files,
2276                        flist->used * sizeof (struct file_struct*));
2277                 if (inc_recurse && dir_flist->used > dstart) {
2278                         static int dir_flist_malloced = 0;
2279                         if (dir_flist_malloced < dir_flist->malloced) {
2280                                 dir_flist->sorted = realloc_array(dir_flist->sorted,
2281                                                         struct file_struct *,
2282                                                         dir_flist->malloced);
2283                                 dir_flist_malloced = dir_flist->malloced;
2284                         }
2285                         memcpy(dir_flist->sorted + dstart, dir_flist->files + dstart,
2286                                (dir_flist->used - dstart) * sizeof (struct file_struct*));
2287                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2288                 }
2289         } else {
2290                 flist->sorted = flist->files;
2291                 if (inc_recurse && dir_flist->used > dstart) {
2292                         dir_flist->sorted = dir_flist->files;
2293                         fsort(dir_flist->sorted + dstart, dir_flist->used - dstart);
2294                 }
2295         }
2296
2297         if (inc_recurse)
2298                 flist_done_allocating(flist);
2299         else if (f >= 0)
2300                 recv_id_list(f, flist);
2301
2302         flist_sort_and_clean(flist, relative_paths);
2303
2304         if (protocol_version < 30) {
2305                 /* Recv the io_error flag */
2306                 if (ignore_errors)
2307                         read_int(f);
2308                 else
2309                         io_error |= read_int(f);
2310         } else if (inc_recurse && flist->ndx_start == 1) {
2311                 if (!file_total || strcmp(flist->sorted[0]->basename, ".") != 0)
2312                         flist->parent_ndx = -1;
2313         }
2314
2315         if (DEBUG_GTE(FLIST, 3))
2316                 output_flist(flist);
2317
2318         if (DEBUG_GTE(FLIST, 2))
2319                 rprintf(FINFO, "recv_file_list done\n");
2320
2321         stats.flist_size += stats.total_read - start_read;
2322         stats.num_files += flist->used;
2323
2324         return flist;
2325 }
2326
2327 /* This is only used once by the receiver if the very first file-list
2328  * has exactly one item in it. */
2329 void recv_additional_file_list(int f)
2330 {
2331         struct file_list *flist;
2332         int ndx = read_ndx(f);
2333         if (ndx == NDX_FLIST_EOF) {
2334                 flist_eof = 1;
2335                 change_local_filter_dir(NULL, 0, 0);
2336         } else {
2337                 ndx = NDX_FLIST_OFFSET - ndx;
2338                 if (ndx < 0 || ndx >= dir_flist->used) {
2339                         ndx = NDX_FLIST_OFFSET - ndx;
2340                         rprintf(FERROR,
2341                                 "[%s] Invalid dir index: %d (%d - %d)\n",
2342                                 who_am_i(), ndx, NDX_FLIST_OFFSET,
2343                                 NDX_FLIST_OFFSET - dir_flist->used + 1);
2344                         exit_cleanup(RERR_PROTOCOL);
2345                 }
2346                 if (DEBUG_GTE(FLIST, 3)) {
2347                         rprintf(FINFO, "[%s] receiving flist for dir %d\n",
2348                                 who_am_i(), ndx);
2349                 }
2350                 flist = recv_file_list(f);
2351                 flist->parent_ndx = ndx;
2352         }
2353 }
2354
2355 /* Search for an identically-named item in the file list.  Note that the
2356  * items must agree in their directory-ness, or no match is returned. */
2357 int flist_find(struct file_list *flist, struct file_struct *f)
2358 {
2359         int low = flist->low, high = flist->high;
2360         int diff, mid, mid_up;
2361
2362         while (low <= high) {
2363                 mid = (low + high) / 2;
2364                 if (F_IS_ACTIVE(flist->sorted[mid]))
2365                         mid_up = mid;
2366                 else {
2367                         /* Scan for the next non-empty entry using the cached
2368                          * distance values.  If the value isn't fully up-to-
2369                          * date, update it. */
2370                         mid_up = mid + F_DEPTH(flist->sorted[mid]);
2371                         if (!F_IS_ACTIVE(flist->sorted[mid_up])) {
2372                                 do {
2373                                     mid_up += F_DEPTH(flist->sorted[mid_up]);
2374                                 } while (!F_IS_ACTIVE(flist->sorted[mid_up]));
2375                                 F_DEPTH(flist->sorted[mid]) = mid_up - mid;
2376                         }
2377                         if (mid_up > high) {
2378                                 /* If there's nothing left above us, set high to
2379                                  * a non-empty entry below us and continue. */
2380                                 high = mid - (int)flist->sorted[mid]->len32;
2381                                 if (!F_IS_ACTIVE(flist->sorted[high])) {
2382                                         do {
2383                                             high -= (int)flist->sorted[high]->len32;
2384                                         } while (!F_IS_ACTIVE(flist->sorted[high]));
2385                                         flist->sorted[mid]->len32 = mid - high;
2386                                 }
2387                                 continue;
2388                         }
2389                 }
2390                 diff = f_name_cmp(flist->sorted[mid_up], f);
2391                 if (diff == 0) {
2392                         if (protocol_version < 29
2393                             && S_ISDIR(flist->sorted[mid_up]->mode)
2394                             != S_ISDIR(f->mode))
2395                                 return -1;
2396                         return mid_up;
2397                 }
2398                 if (diff < 0)
2399                         low = mid_up + 1;
2400                 else
2401                         high = mid - 1;
2402         }
2403         return -1;
2404 }
2405
2406 /*
2407  * Free up any resources a file_struct has allocated
2408  * and clear the file.
2409  */
2410 void clear_file(struct file_struct *file)
2411 {
2412         /* The +1 zeros out the first char of the basename. */
2413         memset(file, 0, FILE_STRUCT_LEN + 1);
2414         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
2415          * entry.  Likewise for len32 in the opposite direction.  We assume
2416          * that we're alone for now since flist_find() will adjust the counts
2417          * it runs into that aren't up-to-date. */
2418         file->len32 = F_DEPTH(file) = 1;
2419 }
2420
2421 /* Allocate a new file list. */
2422 struct file_list *flist_new(int flags, char *msg)
2423 {
2424         struct file_list *flist;
2425
2426         if (!(flist = new0(struct file_list)))
2427                 out_of_memory(msg);
2428
2429         if (flags & FLIST_TEMP) {
2430                 if (!(flist->file_pool = pool_create(SMALL_EXTENT, 0,
2431                                                 out_of_memory, POOL_INTERN)))
2432                         out_of_memory(msg);
2433         } else {
2434                 /* This is a doubly linked list with prev looping back to
2435                  * the end of the list, but the last next pointer is NULL. */
2436                 if (!first_flist) {
2437                         flist->file_pool = pool_create(NORMAL_EXTENT, 0,
2438                                                 out_of_memory, POOL_INTERN);
2439                         if (!flist->file_pool)
2440                                 out_of_memory(msg);
2441
2442                         flist->ndx_start = flist->flist_num = inc_recurse ? 1 : 0;
2443
2444                         first_flist = cur_flist = flist->prev = flist;
2445                 } else {
2446                         struct file_list *prev = first_flist->prev;
2447
2448                         flist->file_pool = first_flist->file_pool;
2449
2450                         flist->ndx_start = prev->ndx_start + prev->used + 1;
2451                         flist->flist_num = prev->flist_num + 1;
2452
2453                         flist->prev = prev;
2454                         prev->next = first_flist->prev = flist;
2455                 }
2456                 flist->pool_boundary = pool_boundary(flist->file_pool, 0);
2457                 flist_cnt++;
2458         }
2459
2460         return flist;
2461 }
2462
2463 /* Free up all elements in a flist. */
2464 void flist_free(struct file_list *flist)
2465 {
2466         if (!flist->prev) {
2467                 /* Was FLIST_TEMP dir-list. */
2468         } else if (flist == flist->prev) {
2469                 first_flist = cur_flist = NULL;
2470                 file_total = 0;
2471                 flist_cnt = 0;
2472         } else {
2473                 if (flist == cur_flist)
2474                         cur_flist = flist->next;
2475                 if (flist == first_flist)
2476                         first_flist = first_flist->next;
2477                 else {
2478                         flist->prev->next = flist->next;
2479                         if (!flist->next)
2480                                 flist->next = first_flist;
2481                 }
2482                 flist->next->prev = flist->prev;
2483                 file_total -= flist->used;
2484                 flist_cnt--;
2485         }
2486
2487         if (!flist->prev || !flist_cnt)
2488                 pool_destroy(flist->file_pool);
2489         else
2490                 pool_free_old(flist->file_pool, flist->pool_boundary);
2491
2492         if (flist->sorted && flist->sorted != flist->files)
2493                 free(flist->sorted);
2494         free(flist->files);
2495         free(flist);
2496 }
2497
2498 /* This routine ensures we don't have any duplicate names in our file list.
2499  * duplicate names can cause corruption because of the pipelining. */
2500 static void flist_sort_and_clean(struct file_list *flist, int strip_root)
2501 {
2502         char fbuf[MAXPATHLEN];
2503         int i, prev_i;
2504
2505         if (!flist)
2506                 return;
2507         if (flist->used == 0) {
2508                 flist->high = -1;
2509                 flist->low = 0;
2510                 return;
2511         }
2512
2513         fsort(flist->sorted, flist->used);
2514
2515         if (!am_sender || inc_recurse) {
2516                 for (i = prev_i = 0; i < flist->used; i++) {
2517                         if (F_IS_ACTIVE(flist->sorted[i])) {
2518                                 prev_i = i;
2519                                 break;
2520                         }
2521                 }
2522                 flist->low = prev_i;
2523         } else {
2524                 i = prev_i = flist->used - 1;
2525                 flist->low = 0;
2526         }
2527
2528         while (++i < flist->used) {
2529                 int j;
2530                 struct file_struct *file = flist->sorted[i];
2531
2532                 if (!F_IS_ACTIVE(file))
2533                         continue;
2534                 if (f_name_cmp(file, flist->sorted[prev_i]) == 0)
2535                         j = prev_i;
2536                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
2537                         int save_mode = file->mode;
2538                         /* Make sure that this directory doesn't duplicate a
2539                          * non-directory earlier in the list. */
2540                         flist->high = prev_i;
2541                         file->mode = S_IFREG;
2542                         j = flist_find(flist, file);
2543                         file->mode = save_mode;
2544                 } else
2545                         j = -1;
2546                 if (j >= 0) {
2547                         int keep, drop;
2548                         /* If one is a dir and the other is not, we want to
2549                          * keep the dir because it might have contents in the
2550                          * list.  Otherwise keep the first one. */
2551                         if (S_ISDIR(file->mode)) {
2552                                 struct file_struct *fp = flist->sorted[j];
2553                                 if (!S_ISDIR(fp->mode))
2554                                         keep = i, drop = j;
2555                                 else {
2556                                         if (am_sender)
2557                                                 file->flags |= FLAG_DUPLICATE;
2558                                         else { /* Make sure we merge our vital flags. */
2559                                                 fp->flags |= file->flags & (FLAG_TOP_DIR|FLAG_CONTENT_DIR);
2560                                                 fp->flags &= file->flags | ~FLAG_IMPLIED_DIR;
2561                                         }
2562                                         keep = j, drop = i;
2563                                 }
2564                         } else
2565                                 keep = j, drop = i;
2566
2567                         if (!am_sender) {
2568                                 if (DEBUG_GTE(DUP, 1)) {
2569                                         rprintf(FINFO,
2570                                             "removing duplicate name %s from file list (%d)\n",
2571                                             f_name(file, fbuf), drop + flist->ndx_start);
2572                                 }
2573                                 clear_file(flist->sorted[drop]);
2574                         }
2575
2576                         if (keep == i) {
2577                                 if (flist->low == drop) {
2578                                         for (j = drop + 1;
2579                                              j < i && !F_IS_ACTIVE(flist->sorted[j]);
2580                                              j++) {}
2581                                         flist->low = j;
2582                                 }
2583                                 prev_i = i;
2584                         }
2585                 } else
2586                         prev_i = i;
2587         }
2588         flist->high = prev_i;
2589
2590         if (strip_root) {
2591                 /* We need to strip off the leading slashes for relative
2592                  * paths, but this must be done _after_ the sorting phase. */
2593                 for (i = flist->low; i <= flist->high; i++) {
2594                         struct file_struct *file = flist->sorted[i];
2595
2596                         if (!file->dirname)
2597                                 continue;
2598                         while (*file->dirname == '/')
2599                                 file->dirname++;
2600                         if (!*file->dirname)
2601                                 file->dirname = NULL;
2602                 }
2603         }
2604
2605         if (prune_empty_dirs && !am_sender) {
2606                 int j, prev_depth = 0;
2607
2608                 prev_i = 0; /* It's OK that this isn't really true. */
2609
2610                 for (i = flist->low; i <= flist->high; i++) {
2611                         struct file_struct *fp, *file = flist->sorted[i];
2612
2613                         /* This temporarily abuses the F_DEPTH() value for a
2614                          * directory that is in a chain that might get pruned.
2615                          * We restore the old value if it gets a reprieve. */
2616                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2617                                 /* Dump empty dirs when coming back down. */
2618                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2619                                         fp = flist->sorted[prev_i];
2620                                         if (F_DEPTH(fp) >= 0)
2621                                                 break;
2622                                         prev_i = -F_DEPTH(fp)-1;
2623                                         clear_file(fp);
2624                                 }
2625                                 prev_depth = F_DEPTH(file);
2626                                 if (is_excluded(f_name(file, fbuf), 1,
2627                                                        ALL_FILTERS)) {
2628                                         /* Keep dirs through this dir. */
2629                                         for (j = prev_depth-1; ; j--) {
2630                                                 fp = flist->sorted[prev_i];
2631                                                 if (F_DEPTH(fp) >= 0)
2632                                                         break;
2633                                                 prev_i = -F_DEPTH(fp)-1;
2634                                                 F_DEPTH(fp) = j;
2635                                         }
2636                                 } else
2637                                         F_DEPTH(file) = -prev_i-1;
2638                                 prev_i = i;
2639                         } else {
2640                                 /* Keep dirs through this non-dir. */
2641                                 for (j = prev_depth; ; j--) {
2642                                         fp = flist->sorted[prev_i];
2643                                         if (F_DEPTH(fp) >= 0)
2644                                                 break;
2645                                         prev_i = -F_DEPTH(fp)-1;
2646                                         F_DEPTH(fp) = j;
2647                                 }
2648                         }
2649                 }
2650                 /* Dump all remaining empty dirs. */
2651                 while (1) {
2652                         struct file_struct *fp = flist->sorted[prev_i];
2653                         if (F_DEPTH(fp) >= 0)
2654                                 break;
2655                         prev_i = -F_DEPTH(fp)-1;
2656                         clear_file(fp);
2657                 }
2658
2659                 for (i = flist->low; i <= flist->high; i++) {
2660                         if (F_IS_ACTIVE(flist->sorted[i]))
2661                                 break;
2662                 }
2663                 flist->low = i;
2664                 for (i = flist->high; i >= flist->low; i--) {
2665                         if (F_IS_ACTIVE(flist->sorted[i]))
2666                                 break;
2667                 }
2668                 flist->high = i;
2669         }
2670 }
2671
2672 static void output_flist(struct file_list *flist)
2673 {
2674         char uidbuf[16], gidbuf[16], depthbuf[16];
2675         struct file_struct *file;
2676         const char *root, *dir, *slash, *name, *trail;
2677         const char *who = who_am_i();
2678         int i;
2679
2680         rprintf(FINFO, "[%s] flist start=%d, used=%d, low=%d, high=%d\n",
2681                 who, flist->ndx_start, flist->used, flist->low, flist->high);
2682         for (i = 0; i < flist->used; i++) {
2683                 file = flist->files[i];
2684                 if ((am_root || am_sender) && uid_ndx) {
2685                         snprintf(uidbuf, sizeof uidbuf, " uid=%u",
2686                                  F_OWNER(file));
2687                 } else
2688                         *uidbuf = '\0';
2689                 if (gid_ndx) {
2690                         static char parens[] = "(\0)\0\0\0";
2691                         char *pp = parens + (file->flags & FLAG_SKIP_GROUP ? 0 : 3);
2692                         snprintf(gidbuf, sizeof gidbuf, " gid=%s%u%s",
2693                                  pp, F_GROUP(file), pp + 2);
2694                 } else
2695                         *gidbuf = '\0';
2696                 if (!am_sender)
2697                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2698                 if (F_IS_ACTIVE(file)) {
2699                         root = am_sender ? NS(F_PATHNAME(file)) : depthbuf;
2700                         if ((dir = file->dirname) == NULL)
2701                                 dir = slash = "";
2702                         else
2703                                 slash = "/";
2704                         name = file->basename;
2705                         trail = S_ISDIR(file->mode) ? "/" : "";
2706                 } else
2707                         root = dir = slash = name = trail = "";
2708                 rprintf(FINFO,
2709                         "[%s] i=%d %s %s%s%s%s mode=0%o len=%s%s%s flags=%x\n",
2710                         who, i + flist->ndx_start,
2711                         root, dir, slash, name, trail,
2712                         (int)file->mode, big_num(F_LENGTH(file), 0),
2713                         uidbuf, gidbuf, file->flags);
2714         }
2715 }
2716
2717 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2718 enum fnc_type { t_PATH, t_ITEM };
2719
2720 static int found_prefix;
2721
2722 /* Compare the names of two file_struct entities, similar to how strcmp()
2723  * would do if it were operating on the joined strings.
2724  *
2725  * Some differences beginning with protocol_version 29: (1) directory names
2726  * are compared with an assumed trailing slash so that they compare in a
2727  * way that would cause them to sort immediately prior to any content they
2728  * may have; (2) a directory of any name compares after a non-directory of
2729  * any name at the same depth; (3) a directory with name "." compares prior
2730  * to anything else.  These changes mean that a directory and a non-dir
2731  * with the same name will not compare as equal (protocol_version >= 29).
2732  *
2733  * The dirname component can be an empty string, but the basename component
2734  * cannot (and never is in the current codebase).  The basename component
2735  * may be NULL (for a removed item), in which case it is considered to be
2736  * after any existing item. */
2737 int f_name_cmp(const struct file_struct *f1, const struct file_struct *f2)
2738 {
2739         int dif;
2740         const uchar *c1, *c2;
2741         enum fnc_state state1, state2;
2742         enum fnc_type type1, type2;
2743         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2744
2745         if (!f1 || !F_IS_ACTIVE(f1)) {
2746                 if (!f2 || !F_IS_ACTIVE(f2))
2747                         return 0;
2748                 return -1;
2749         }
2750         if (!f2 || !F_IS_ACTIVE(f2))
2751                 return 1;
2752
2753         c1 = (uchar*)f1->dirname;
2754         c2 = (uchar*)f2->dirname;
2755         if (c1 == c2)
2756                 c1 = c2 = NULL;
2757         if (!c1) {
2758                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2759                 c1 = (const uchar*)f1->basename;
2760                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2761                         type1 = t_ITEM;
2762                         state1 = s_TRAILING;
2763                         c1 = (uchar*)"";
2764                 } else
2765                         state1 = s_BASE;
2766         } else {
2767                 type1 = t_path;
2768                 state1 = s_DIR;
2769         }
2770         if (!c2) {
2771                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2772                 c2 = (const uchar*)f2->basename;
2773                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2774                         type2 = t_ITEM;
2775                         state2 = s_TRAILING;
2776                         c2 = (uchar*)"";
2777                 } else
2778                         state2 = s_BASE;
2779         } else {
2780                 type2 = t_path;
2781                 state2 = s_DIR;
2782         }
2783
2784         if (type1 != type2)
2785                 return type1 == t_PATH ? 1 : -1;
2786
2787         do {
2788                 if (!*c1) {
2789                         switch (state1) {
2790                         case s_DIR:
2791                                 state1 = s_SLASH;
2792                                 c1 = (uchar*)"/";
2793                                 break;
2794                         case s_SLASH:
2795                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2796                                 c1 = (const uchar*)f1->basename;
2797                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2798                                         type1 = t_ITEM;
2799                                         state1 = s_TRAILING;
2800                                         c1 = (uchar*)"";
2801                                 } else
2802                                         state1 = s_BASE;
2803                                 break;
2804                         case s_BASE:
2805                                 state1 = s_TRAILING;
2806                                 if (type1 == t_PATH) {
2807                                         c1 = (uchar*)"/";
2808                                         break;
2809                                 }
2810                                 /* FALL THROUGH */
2811                         case s_TRAILING:
2812                                 type1 = t_ITEM;
2813                                 break;
2814                         }
2815                         if (*c2 && type1 != type2)
2816                                 return type1 == t_PATH ? 1 : -1;
2817                 }
2818                 if (!*c2) {
2819                         switch (state2) {
2820                         case s_DIR:
2821                                 state2 = s_SLASH;
2822                                 c2 = (uchar*)"/";
2823                                 break;
2824                         case s_SLASH:
2825                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2826                                 c2 = (const uchar*)f2->basename;
2827                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2828                                         type2 = t_ITEM;
2829                                         state2 = s_TRAILING;
2830                                         c2 = (uchar*)"";
2831                                 } else
2832                                         state2 = s_BASE;
2833                                 break;
2834                         case s_BASE:
2835                                 state2 = s_TRAILING;
2836                                 if (type2 == t_PATH) {
2837                                         c2 = (uchar*)"/";
2838                                         break;
2839                                 }
2840                                 /* FALL THROUGH */
2841                         case s_TRAILING:
2842                                 found_prefix = 1;
2843                                 if (!*c1)
2844                                         return 0;
2845                                 type2 = t_ITEM;
2846                                 break;
2847                         }
2848                         if (type1 != type2)
2849                                 return type1 == t_PATH ? 1 : -1;
2850                 }
2851         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2852
2853         return dif;
2854 }
2855
2856 /* Returns 1 if f1's filename has all of f2's filename as a prefix.  This does
2857  * not match if f2's basename is not an exact match of a path element in f1.
2858  * E.g. /path/foo is not a prefix of /path/foobar/baz, but /path/foobar is. */
2859 int f_name_has_prefix(const struct file_struct *f1, const struct file_struct *f2)
2860 {
2861         found_prefix = 0;
2862         f_name_cmp(f1, f2);
2863         return found_prefix;
2864 }
2865
2866 char *f_name_buf(void)
2867 {
2868         static char names[5][MAXPATHLEN];
2869         static unsigned int n;
2870
2871         n = (n + 1) % (sizeof names / sizeof names[0]);
2872
2873         return names[n];
2874 }
2875
2876 /* Return a copy of the full filename of a flist entry, using the indicated
2877  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2878  * done because we checked the size when creating the file_struct entry.
2879  */
2880 char *f_name(const struct file_struct *f, char *fbuf)
2881 {
2882         if (!f || !F_IS_ACTIVE(f))
2883                 return NULL;
2884
2885         if (!fbuf)
2886                 fbuf = f_name_buf();
2887
2888         if (f->dirname) {
2889                 int len = strlen(f->dirname);
2890                 memcpy(fbuf, f->dirname, len);
2891                 fbuf[len] = '/';
2892                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2893         } else
2894                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2895
2896         return fbuf;
2897 }
2898
2899 /* Do a non-recursive scan of the named directory, possibly ignoring all
2900  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2901  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2902  * buffer (the functions we call will append names onto the end, but the old
2903  * dir value will be restored on exit). */
2904 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2905 {
2906         struct file_list *dirlist;
2907         char dirbuf[MAXPATHLEN];
2908         int save_recurse = recurse;
2909         int save_xfer_dirs = xfer_dirs;
2910         int save_prune_empty_dirs = prune_empty_dirs;
2911
2912         if (dlen < 0) {
2913                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2914                 if (dlen >= MAXPATHLEN)
2915                         return NULL;
2916                 dirname = dirbuf;
2917         }
2918
2919         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2920
2921         recurse = 0;
2922         xfer_dirs = 1;
2923         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen, 0);
2924         xfer_dirs = save_xfer_dirs;
2925         recurse = save_recurse;
2926         if (INFO_GTE(PROGRESS, 1))
2927                 flist_count_offset += dirlist->used;
2928
2929         prune_empty_dirs = 0;
2930         dirlist->sorted = dirlist->files;
2931         flist_sort_and_clean(dirlist, 0);
2932         prune_empty_dirs = save_prune_empty_dirs;
2933
2934         if (DEBUG_GTE(FLIST, 3))
2935                 output_flist(dirlist);
2936
2937         return dirlist;
2938 }