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) 2002-2007 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 version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
  21  */
  22
  23 #include "rsync.h"
  24 #include "rounding.h"
  25
  26 extern int verbose;
  27 extern int list_only;
  28 extern int am_root;
  29 extern int am_server;
  30 extern int am_daemon;
  31 extern int am_sender;
  32 extern int inc_recurse;
  33 extern int do_progress;
  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 xfer_dirs;
  40 extern int filesfrom_fd;
  41 extern int one_file_system;
  42 extern int copy_dirlinks;
  43 extern int keep_dirlinks;
  44 extern int preserve_links;
  45 extern int preserve_hard_links;
  46 extern int preserve_devices;
  47 extern int preserve_specials;
  48 extern int preserve_uid;
  49 extern int preserve_gid;
  50 extern int relative_paths;
  51 extern int implied_dirs;
  52 extern int file_extra_cnt;
  53 extern int ignore_perishable;
  54 extern int non_perishable_cnt;
  55 extern int prune_empty_dirs;
  56 extern int copy_links;
  57 extern int copy_unsafe_links;
  58 extern int protocol_version;
  59 extern int sanitize_paths;
  60 extern struct stats stats;
  61
  62 extern char curr_dir[MAXPATHLEN];
  63
  64 extern struct chmod_mode_struct *chmod_modes;
  65
  66 extern struct filter_list_struct filter_list;
  67 extern struct filter_list_struct server_filter_list;
  68
  69 int io_error;
  70 int checksum_len;
  71 dev_t filesystem_dev; /* used to implement -x */
  72
  73 struct file_list *cur_flist, *first_flist, *dir_flist;
  74 int send_dir_ndx = -1, send_dir_depth = 0;
  75 int flist_cnt = 0; /* how many (non-tmp) file list objects exist */
  76 int file_total = 0; /* total of all active items over all file-lists */
  77 int flist_eof = 0; /* all the file-lists are now known */
  78
  79 /* The tmp_* vars are used as a cache area by make_file() to store data
  80  * that the sender doesn't need to remember in its file list.  The data
  81  * will survive just long enough to be used by send_file_entry(). */
  82 static dev_t tmp_rdev;
  83 #ifdef SUPPORT_HARD_LINKS
  84 static int64 tmp_dev, tmp_ino;
  85 #endif
  86 static char tmp_sum[MD4_SUM_LENGTH];
  87
  88 static char empty_sum[MD4_SUM_LENGTH];
  89 static int flist_count_offset; /* for --delete --progress */
  90
  91 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  92 static void output_flist(struct file_list *flist);
  93
  94 void init_flist(void)
  95 {
  96         if (verbose > 4) {
  97                 rprintf(FINFO, "FILE_STRUCT_LEN=%d, EXTRA_LEN=%d\n",
  98                         (int)FILE_STRUCT_LEN, (int)EXTRA_LEN);
  99         }
 100         checksum_len = protocol_version < 21 ? 2 : MD4_SUM_LENGTH;
 101 }
 102
 103 static int show_filelist_p(void)
 104 {
 105         return verbose && xfer_dirs && !am_server && !inc_recurse;
 106 }
 107
 108 static void start_filelist_progress(char *kind)
 109 {
 110         rprintf(FCLIENT, "%s ... ", kind);
 111         if (verbose > 1 || do_progress)
 112                 rprintf(FCLIENT, "\n");
 113         rflush(FINFO);
 114 }
 115
 116 static void emit_filelist_progress(int count)
 117 {
 118         rprintf(FCLIENT, " %d files...\r", count);
 119 }
 120
 121 static void maybe_emit_filelist_progress(int count)
 122 {
 123         if (do_progress && show_filelist_p() && (count % 100) == 0)
 124                 emit_filelist_progress(count);
 125 }
 126
 127 static void finish_filelist_progress(const struct file_list *flist)
 128 {
 129         if (do_progress) {
 130                 /* This overwrites the progress line */
 131                 rprintf(FINFO, "%d file%sto consider\n",
 132                         flist->count, flist->count == 1 ? " " : "s ");
 133         } else
 134                 rprintf(FINFO, "done\n");
 135 }
 136
 137 void show_flist_stats(void)
 138 {
 139         /* Nothing yet */
 140 }
 141
 142 static void list_file_entry(struct file_struct *f)
 143 {
 144         char permbuf[PERMSTRING_SIZE];
 145         double len;
 146
 147         if (!F_IS_ACTIVE(f)) {
 148                 /* this can happen if duplicate names were removed */
 149                 return;
 150         }
 151
 152         permstring(permbuf, f->mode);
 153         len = F_LENGTH(f);
 154
 155 #ifdef SUPPORT_LINKS
 156         if (preserve_links && S_ISLNK(f->mode)) {
 157                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 158                         permbuf, len, timestring(f->modtime),
 159                         f_name(f, NULL), F_SYMLINK(f));
 160         } else
 161 #endif
 162         {
 163                 rprintf(FINFO, "%s %11.0f %s %s\n",
 164                         permbuf, len, timestring(f->modtime),
 165                         f_name(f, NULL));
 166         }
 167 }
 168
 169 /* Stat either a symlink or its referent, depending on the settings of
 170  * copy_links, copy_unsafe_links, etc.  Returns -1 on error, 0 on success.
 171  *
 172  * If path is the name of a symlink, then the linkbuf buffer (which must hold
 173  * MAXPATHLEN chars) will be set to the symlink's target string.
 174  *
 175  * The stat structure pointed to by stp will contain information about the
 176  * link or the referent as appropriate, if they exist. */
 177 static int readlink_stat(const char *path, STRUCT_STAT *stp, char *linkbuf)
 178 {
 179 #ifdef SUPPORT_LINKS
 180         if (link_stat(path, stp, copy_dirlinks) < 0)
 181                 return -1;
 182         if (S_ISLNK(stp->st_mode)) {
 183                 int llen = readlink(path, linkbuf, MAXPATHLEN - 1);
 184                 if (llen < 0)
 185                         return -1;
 186                 linkbuf[llen] = '\0';
 187                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 188                         if (verbose > 1) {
 189                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 190                                         path, linkbuf);
 191                         }
 192                         return do_stat(path, stp);
 193                 }
 194         }
 195         return 0;
 196 #else
 197         return do_stat(path, stp);
 198 #endif
 199 }
 200
 201 int link_stat(const char *path, STRUCT_STAT *stp, int follow_dirlinks)
 202 {
 203 #ifdef SUPPORT_LINKS
 204         if (copy_links)
 205                 return do_stat(path, stp);
 206         if (do_lstat(path, stp) < 0)
 207                 return -1;
 208         if (follow_dirlinks && S_ISLNK(stp->st_mode)) {
 209                 STRUCT_STAT st;
 210                 if (do_stat(path, &st) == 0 && S_ISDIR(st.st_mode))
 211                         *stp = st;
 212         }
 213         return 0;
 214 #else
 215         return do_stat(path, stp);
 216 #endif
 217 }
 218
 219 /* This function is used to check if a file should be included/excluded
 220  * from the list of files based on its name and type etc.  The value of
 221  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 222 static int is_excluded(char *fname, int is_dir, int filter_level)
 223 {
 224 #if 0 /* This currently never happens, so avoid a useless compare. */
 225         if (filter_level == NO_FILTERS)
 226                 return 0;
 227 #endif
 228         if (fname) {
 229                 /* never exclude '.', even if somebody does --exclude '*' */
 230                 if (fname[0] == '.' && !fname[1])
 231                         return 0;
 232                 /* Handle the -R version of the '.' dir. */
 233                 if (fname[0] == '/') {
 234                         int len = strlen(fname);
 235                         if (fname[len-1] == '.' && fname[len-2] == '/')
 236                                 return 0;
 237                 }
 238         }
 239         if (server_filter_list.head
 240             && check_filter(&server_filter_list, fname, is_dir) < 0)
 241                 return 1;
 242         if (filter_level != ALL_FILTERS)
 243                 return 0;
 244         if (filter_list.head
 245             && check_filter(&filter_list, fname, is_dir) < 0)
 246                 return 1;
 247         return 0;
 248 }
 249
 250 static int to_wire_mode(mode_t mode)
 251 {
 252 #ifdef SUPPORT_LINKS
 253 #if _S_IFLNK != 0120000
 254         if (S_ISLNK(mode))
 255                 return (mode & ~(_S_IFMT)) | 0120000;
 256 #endif
 257 #endif
 258         return mode;
 259 }
 260
 261 static mode_t from_wire_mode(int mode)
 262 {
 263 #if _S_IFLNK != 0120000
 264         if ((mode & (_S_IFMT)) == 0120000)
 265                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 266 #endif
 267         return mode;
 268 }
 269
 270 static void send_directory(int f, struct file_list *flist, int ndx,
 271                            char *fbuf, int len, int flags);
 272
 273 static const char *flist_dir, *orig_dir;
 274 static int flist_dir_len;
 275
 276
 277 /**
 278  * Make sure @p flist is big enough to hold at least @p flist->count
 279  * entries.
 280  **/
 281 void flist_expand(struct file_list *flist)
 282 {
 283         struct file_struct **new_ptr;
 284
 285         if (flist->count < flist->malloced)
 286                 return;
 287
 288         if (flist->malloced < FLIST_START)
 289                 flist->malloced = FLIST_START;
 290         else if (flist->malloced >= FLIST_LINEAR)
 291                 flist->malloced += FLIST_LINEAR;
 292         else
 293                 flist->malloced *= 2;
 294
 295         /*
 296          * In case count jumped or we are starting the list
 297          * with a known size just set it.
 298          */
 299         if (flist->malloced < flist->count)
 300                 flist->malloced = flist->count;
 301
 302         new_ptr = realloc_array(flist->files, struct file_struct *,
 303                                 flist->malloced);
 304
 305         if (verbose >= 2 && flist->malloced != FLIST_START) {
 306                 rprintf(FCLIENT, "[%s] expand file_list to %.0f bytes, did%s move\n",
 307                     who_am_i(),
 308                     (double)sizeof flist->files[0] * flist->malloced,
 309                     (new_ptr == flist->files) ? " not" : "");
 310         }
 311
 312         flist->files = new_ptr;
 313
 314         if (!flist->files)
 315                 out_of_memory("flist_expand");
 316 }
 317
 318 int push_flist_dir(const char *dir, int len)
 319 {
 320         if (dir == flist_dir)
 321                 return 1;
 322
 323         if (!orig_dir)
 324                 orig_dir = strdup(curr_dir);
 325
 326         if (flist_dir && !pop_dir(orig_dir)) {
 327                 rsyserr(FERROR, errno, "pop_dir %s failed",
 328                         full_fname(orig_dir));
 329                 exit_cleanup(RERR_FILESELECT);
 330         }
 331
 332         if (dir && !push_dir(dir, 0)) {
 333                 io_error |= IOERR_GENERAL;
 334                 rsyserr(FERROR, errno, "push_dir %s failed",
 335                         full_fname(dir));
 336                 return 0;
 337         }
 338
 339         flist_dir = dir;
 340         flist_dir_len = len >= 0 ? len : dir ? (int)strlen(dir) : 0;
 341
 342         return 1;
 343 }
 344
 345 static void send_file_entry(int f, struct file_struct *file, int ndx)
 346 {
 347         static time_t modtime;
 348         static mode_t mode;
 349         static int64 dev;
 350         static dev_t rdev;
 351         static uint32 rdev_major;
 352         static uid_t uid;
 353         static gid_t gid;
 354         static char *user_name, *group_name;
 355         static char lastname[MAXPATHLEN];
 356         char fname[MAXPATHLEN];
 357         int first_hlink_ndx = -1;
 358         int l1, l2;
 359         int flags;
 360
 361         f_name(file, fname);
 362
 363         flags = file->flags & FLAG_TOP_DIR; /* FLAG_TOP_DIR == XMIT_TOP_DIR */
 364
 365         if (file->mode == mode)
 366                 flags |= XMIT_SAME_MODE;
 367         else
 368                 mode = file->mode;
 369         if ((preserve_devices && IS_DEVICE(mode))
 370          || (preserve_specials && IS_SPECIAL(mode))) {
 371                 if (protocol_version < 28) {
 372                         if (tmp_rdev == rdev)
 373                                 flags |= XMIT_SAME_RDEV_pre28;
 374                         else
 375                                 rdev = tmp_rdev;
 376                 } else {
 377                         rdev = tmp_rdev;
 378                         if ((uint32)major(rdev) == rdev_major)
 379                                 flags |= XMIT_SAME_RDEV_MAJOR;
 380                         else
 381                                 rdev_major = major(rdev);
 382                         if ((uint32)minor(rdev) <= 0xFFu)
 383                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
 384                 }
 385         } else if (protocol_version < 28)
 386                 rdev = MAKEDEV(0, 0);
 387         if (preserve_uid) {
 388                 if (F_UID(file) == uid && *lastname)
 389                         flags |= XMIT_SAME_UID;
 390                 else {
 391                         uid = F_UID(file);
 392                         if (preserve_uid && !numeric_ids) {
 393                                 user_name = add_uid(uid);
 394                                 if (inc_recurse && user_name)
 395                                         flags |= XMIT_USER_NAME_FOLLOWS;
 396                         }
 397                 }
 398         }
 399         if (preserve_gid) {
 400                 if (F_GID(file) == gid && *lastname)
 401                         flags |= XMIT_SAME_GID;
 402                 else {
 403                         gid = F_GID(file);
 404                         if (preserve_gid && !numeric_ids) {
 405                                 group_name = add_gid(gid);
 406                                 if (inc_recurse && group_name)
 407                                         flags |= XMIT_GROUP_NAME_FOLLOWS;
 408                         }
 409                 }
 410         }
 411         if (file->modtime == modtime)
 412                 flags |= XMIT_SAME_TIME;
 413         else
 414                 modtime = file->modtime;
 415
 416 #ifdef SUPPORT_HARD_LINKS
 417         if (tmp_dev != 0) {
 418                 if (protocol_version >= 30) {
 419                         struct idev_node *np = idev_node(tmp_dev, tmp_ino);
 420                         first_hlink_ndx = (int32)(long)np->data - 1;
 421                         if (first_hlink_ndx < 0) {
 422                                 np->data = (void*)(long)(ndx + 1);
 423                                 flags |= XMIT_HLINK_FIRST;
 424                         }
 425                         flags |= XMIT_HLINKED;
 426                 } else {
 427                         if (tmp_dev == dev) {
 428                                 if (protocol_version >= 28)
 429                                         flags |= XMIT_SAME_DEV_pre30;
 430                         } else
 431                                 dev = tmp_dev;
 432                         flags |= XMIT_HLINKED;
 433                 }
 434         }
 435 #endif
 436
 437         for (l1 = 0;
 438             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 439             l1++) {}
 440         l2 = strlen(fname+l1);
 441
 442         if (l1 > 0)
 443                 flags |= XMIT_SAME_NAME;
 444         if (l2 > 255)
 445                 flags |= XMIT_LONG_NAME;
 446
 447         /* We must make sure we don't send a zero flag byte or the
 448          * other end will terminate the flist transfer.  Note that
 449          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 450          * it's harmless way to add a bit to the first flag byte. */
 451         if (protocol_version >= 28) {
 452                 if (!flags && !S_ISDIR(mode))
 453                         flags |= XMIT_TOP_DIR;
 454                 if ((flags & 0xFF00) || !flags) {
 455                         flags |= XMIT_EXTENDED_FLAGS;
 456                         write_shortint(f, flags);
 457                 } else
 458                         write_byte(f, flags);
 459         } else {
 460                 if (!(flags & 0xFF))
 461                         flags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 462                 write_byte(f, flags);
 463         }
 464         if (flags & XMIT_SAME_NAME)
 465                 write_byte(f, l1);
 466         if (flags & XMIT_LONG_NAME)
 467                 write_int(f, l2);
 468         else
 469                 write_byte(f, l2);
 470         write_buf(f, fname + l1, l2);
 471
 472         if (first_hlink_ndx >= 0) {
 473                 write_int(f, first_hlink_ndx);
 474                 goto the_end;
 475         }
 476
 477         write_longint(f, F_LENGTH(file));
 478         if (!(flags & XMIT_SAME_TIME))
 479                 write_int(f, modtime);
 480         if (!(flags & XMIT_SAME_MODE))
 481                 write_int(f, to_wire_mode(mode));
 482         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 483                 write_int(f, uid);
 484                 if (flags & XMIT_USER_NAME_FOLLOWS) {
 485                         int len = strlen(user_name);
 486                         write_byte(f, len);
 487                         write_buf(f, user_name, len);
 488                 }
 489         }
 490         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 491                 write_int(f, gid);
 492                 if (flags & XMIT_GROUP_NAME_FOLLOWS) {
 493                         int len = strlen(group_name);
 494                         write_byte(f, len);
 495                         write_buf(f, group_name, len);
 496                 }
 497         }
 498         if ((preserve_devices && IS_DEVICE(mode))
 499          || (preserve_specials && IS_SPECIAL(mode))) {
 500                 if (protocol_version < 28) {
 501                         if (!(flags & XMIT_SAME_RDEV_pre28))
 502                                 write_int(f, (int)rdev);
 503                 } else {
 504                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 505                                 write_int(f, major(rdev));
 506                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 507                                 write_byte(f, minor(rdev));
 508                         else
 509                                 write_int(f, minor(rdev));
 510                 }
 511         }
 512
 513 #ifdef SUPPORT_LINKS
 514         if (preserve_links && S_ISLNK(mode)) {
 515                 const char *sl = F_SYMLINK(file);
 516                 int len = strlen(sl);
 517                 write_int(f, len);
 518                 write_buf(f, sl, len);
 519         }
 520 #endif
 521
 522 #ifdef SUPPORT_HARD_LINKS
 523         if (tmp_dev != 0 && protocol_version < 30) {
 524                 if (protocol_version < 26) {
 525                         /* 32-bit dev_t and ino_t */
 526                         write_int(f, (int32)dev);
 527                         write_int(f, (int32)tmp_ino);
 528                 } else {
 529                         /* 64-bit dev_t and ino_t */
 530                         if (!(flags & XMIT_SAME_DEV_pre30))
 531                                 write_longint(f, dev);
 532                         write_longint(f, tmp_ino);
 533                 }
 534         }
 535 #endif
 536
 537         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 538                 const char *sum;
 539                 if (S_ISREG(mode))
 540                         sum = tmp_sum;
 541                 else {
 542                         /* Prior to 28, we sent a useless set of nulls. */
 543                         sum = empty_sum;
 544                 }
 545                 write_buf(f, sum, checksum_len);
 546         }
 547
 548   the_end:
 549         strlcpy(lastname, fname, MAXPATHLEN);
 550
 551         if (S_ISREG(mode) || S_ISLNK(mode))
 552                 stats.total_size += F_LENGTH(file);
 553 }
 554
 555 static struct file_struct *recv_file_entry(struct file_list *flist,
 556                                            int flags, int f)
 557 {
 558         static time_t modtime;
 559         static mode_t mode;
 560         static int64 dev;
 561         static dev_t rdev;
 562         static uint32 rdev_major;
 563         static uid_t uid;
 564         static gid_t gid;
 565         static char lastname[MAXPATHLEN], *lastdir;
 566         static int lastdir_depth, lastdir_len = -1;
 567         static unsigned int del_hier_name_len = 0;
 568         static int in_del_hier = 0;
 569         char thisname[MAXPATHLEN];
 570         unsigned int l1 = 0, l2 = 0;
 571         int alloc_len, basename_len, linkname_len;
 572         int extra_len = file_extra_cnt * EXTRA_LEN;
 573         int first_hlink_ndx = -1;
 574         OFF_T file_length;
 575         const char *basename;
 576         char *bp;
 577         struct file_struct *file;
 578
 579         if (flags & XMIT_SAME_NAME)
 580                 l1 = read_byte(f);
 581
 582         if (flags & XMIT_LONG_NAME)
 583                 l2 = read_int(f);
 584         else
 585                 l2 = read_byte(f);
 586
 587         if (l2 >= MAXPATHLEN - l1) {
 588                 rprintf(FERROR,
 589                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s [%s]\n",
 590                         flags, l1, l2, lastname, who_am_i());
 591                 overflow_exit("recv_file_entry");
 592         }
 593
 594         strlcpy(thisname, lastname, l1 + 1);
 595         read_sbuf(f, &thisname[l1], l2);
 596         thisname[l1 + l2] = 0;
 597
 598         strlcpy(lastname, thisname, MAXPATHLEN);
 599
 600         clean_fname(thisname, 0);
 601
 602         if (sanitize_paths)
 603                 sanitize_path(thisname, thisname, "", 0, NULL);
 604
 605         if ((basename = strrchr(thisname, '/')) != NULL) {
 606                 int len = basename++ - thisname;
 607                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 608                         lastdir = new_array(char, len + 1);
 609                         memcpy(lastdir, thisname, len);
 610                         lastdir[len] = '\0';
 611                         lastdir_len = len;
 612                         lastdir_depth = count_dir_elements(lastdir);
 613                 }
 614         } else
 615                 basename = thisname;
 616         basename_len = strlen(basename) + 1; /* count the '\0' */
 617
 618 #ifdef SUPPORT_HARD_LINKS
 619         if (protocol_version >= 30
 620          && BITS_SETnUNSET(flags, XMIT_HLINKED, XMIT_HLINK_FIRST)) {
 621                 struct file_struct *first;
 622                 first_hlink_ndx = read_int(f);
 623                 if (first_hlink_ndx < 0 || first_hlink_ndx >= flist->count) {
 624                         rprintf(FERROR,
 625                                 "hard-link reference out of range: %d (%d)\n",
 626                                 first_hlink_ndx, flist->count);
 627                         exit_cleanup(RERR_PROTOCOL);
 628                 }
 629                 first = flist->files[first_hlink_ndx];
 630                 file_length = F_LENGTH(first);
 631                 modtime = first->modtime;
 632                 mode = first->mode;
 633                 if (preserve_uid)
 634                         uid = F_UID(first);
 635                 if (preserve_gid)
 636                         gid = F_GID(first);
 637                 if ((preserve_devices && IS_DEVICE(mode))
 638                  || (preserve_specials && IS_SPECIAL(mode))) {
 639                         uint32 *devp = F_RDEV_P(first);
 640                         rdev = MAKEDEV(DEV_MAJOR(devp), DEV_MINOR(devp));
 641                 }
 642                 if (preserve_links && S_ISLNK(mode))
 643                         linkname_len = strlen(F_SYMLINK(first)) + 1;
 644                 else
 645                         linkname_len = 0;
 646                 goto create_object;
 647         }
 648 #endif
 649
 650         file_length = read_longint(f);
 651         if (!(flags & XMIT_SAME_TIME))
 652                 modtime = (time_t)read_int(f);
 653         if (!(flags & XMIT_SAME_MODE))
 654                 mode = from_wire_mode(read_int(f));
 655
 656         if (chmod_modes && !S_ISLNK(mode))
 657                 mode = tweak_mode(mode, chmod_modes);
 658
 659         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 660                 uid = (uid_t)read_int(f);
 661                 if (flags & XMIT_USER_NAME_FOLLOWS)
 662                         uid = recv_user_name(f, uid);
 663                 else if (inc_recurse && am_root && !numeric_ids)
 664                         uid = match_uid(uid);
 665         }
 666         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 667                 gid = (gid_t)read_int(f);
 668                 if (flags & XMIT_GROUP_NAME_FOLLOWS)
 669                         gid = recv_group_name(f, gid);
 670                 else if (inc_recurse && (!am_root || !numeric_ids))
 671                         gid = match_gid(gid);
 672         }
 673
 674         if ((preserve_devices && IS_DEVICE(mode))
 675          || (preserve_specials && IS_SPECIAL(mode))) {
 676                 if (protocol_version < 28) {
 677                         if (!(flags & XMIT_SAME_RDEV_pre28))
 678                                 rdev = (dev_t)read_int(f);
 679                 } else {
 680                         uint32 rdev_minor;
 681                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 682                                 rdev_major = read_int(f);
 683                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 684                                 rdev_minor = read_byte(f);
 685                         else
 686                                 rdev_minor = read_int(f);
 687                         rdev = MAKEDEV(rdev_major, rdev_minor);
 688                 }
 689                 extra_len += 2 * EXTRA_LEN;
 690                 file_length = 0;
 691         } else if (protocol_version < 28)
 692                 rdev = MAKEDEV(0, 0);
 693
 694 #ifdef SUPPORT_LINKS
 695         if (preserve_links && S_ISLNK(mode)) {
 696                 linkname_len = read_int(f) + 1; /* count the '\0' */
 697                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 698                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 699                                 linkname_len - 1);
 700                         overflow_exit("recv_file_entry");
 701                 }
 702         }
 703         else
 704 #endif
 705                 linkname_len = 0;
 706
 707 #ifdef SUPPORT_HARD_LINKS
 708   create_object:
 709         if (preserve_hard_links) {
 710                 if (protocol_version < 28 && S_ISREG(mode))
 711                         flags |= XMIT_HLINKED;
 712                 if (flags & XMIT_HLINKED)
 713                         extra_len += EXTRA_LEN;
 714         }
 715 #endif
 716
 717         if (always_checksum && S_ISREG(mode))
 718                 extra_len += SUM_EXTRA_CNT * EXTRA_LEN;
 719
 720         if (file_length > 0xFFFFFFFFu && S_ISREG(mode))
 721                 extra_len += EXTRA_LEN;
 722
 723 #if EXTRA_ROUNDING > 0
 724         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
 725                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
 726 #endif
 727
 728         if (inc_recurse && S_ISDIR(mode)) {
 729                 if (one_file_system) {
 730                         /* Room to save the dir's device for -x */
 731                         extra_len += 2 * EXTRA_LEN;
 732                 }
 733                 flist = dir_flist;
 734         }
 735
 736         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
 737                   + linkname_len;
 738         bp = pool_alloc(flist->file_pool, alloc_len, "recv_file_entry");
 739
 740         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
 741         bp += extra_len;
 742         file = (struct file_struct *)bp;
 743         bp += FILE_STRUCT_LEN;
 744
 745         memcpy(bp, basename, basename_len);
 746         bp += basename_len + linkname_len; /* skip space for symlink too */
 747
 748 #ifdef SUPPORT_HARD_LINKS
 749         if (flags & XMIT_HLINKED)
 750                 file->flags |= FLAG_HLINKED;
 751 #endif
 752         file->modtime = modtime;
 753         file->len32 = (uint32)file_length;
 754         if (file_length > 0xFFFFFFFFu && S_ISREG(mode)) {
 755                 file->flags |= FLAG_LENGTH64;
 756                 OPT_EXTRA(file, 0)->unum = (uint32)(file_length >> 32);
 757         }
 758         file->mode = mode;
 759         if (preserve_uid)
 760                 F_OWNER(file) = uid;
 761         if (preserve_gid)
 762                 F_GROUP(file) = gid;
 763
 764         if (basename != thisname) {
 765                 file->dirname = lastdir;
 766                 F_DEPTH(file) = lastdir_depth + 1;
 767         } else
 768                 F_DEPTH(file) = 1;
 769
 770         if (S_ISDIR(mode)) {
 771                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 772                         F_DEPTH(file)--;
 773                 if (flags & XMIT_TOP_DIR) {
 774                         in_del_hier = recurse;
 775                         del_hier_name_len = F_DEPTH(file) == 0 ? 0 : l1 + l2;
 776                         if (relative_paths && del_hier_name_len > 2
 777                             && lastname[del_hier_name_len-1] == '.'
 778                             && lastname[del_hier_name_len-2] == '/')
 779                                 del_hier_name_len -= 2;
 780                         file->flags |= FLAG_TOP_DIR | FLAG_XFER_DIR;
 781                 } else if (in_del_hier) {
 782                         if (!relative_paths || !del_hier_name_len
 783                          || (l1 >= del_hier_name_len
 784                           && lastname[del_hier_name_len] == '/'))
 785                                 file->flags |= FLAG_XFER_DIR;
 786                         else
 787                                 in_del_hier = 0;
 788                 }
 789         }
 790
 791         if ((preserve_devices && IS_DEVICE(mode))
 792          || (preserve_specials && IS_SPECIAL(mode))) {
 793                 uint32 *devp = F_RDEV_P(file);
 794                 DEV_MAJOR(devp) = major(rdev);
 795                 DEV_MINOR(devp) = minor(rdev);
 796         }
 797
 798 #ifdef SUPPORT_LINKS
 799         if (linkname_len) {
 800                 bp = (char*)file->basename + basename_len;
 801                 if (first_hlink_ndx >= 0) {
 802                         struct file_struct *first = flist->files[first_hlink_ndx];
 803                         memcpy(bp, F_SYMLINK(first), linkname_len);
 804                 } else
 805                         read_sbuf(f, bp, linkname_len - 1);
 806                 if (sanitize_paths)
 807                         sanitize_path(bp, bp, "", lastdir_depth, NULL);
 808         }
 809 #endif
 810
 811 #ifdef SUPPORT_HARD_LINKS
 812         if (preserve_hard_links && flags & XMIT_HLINKED) {
 813                 if (protocol_version >= 30) {
 814                         F_HL_GNUM(file) = flags & XMIT_HLINK_FIRST
 815                                         ? flist->count : first_hlink_ndx;
 816                 } else {
 817                         static int32 cnt = 0;
 818                         struct idev_node *np;
 819                         int64 ino;
 820                         int32 ndx;
 821                         if (protocol_version < 26) {
 822                                 dev = read_int(f);
 823                                 ino = read_int(f);
 824                         } else {
 825                                 if (!(flags & XMIT_SAME_DEV_pre30))
 826                                         dev = read_longint(f);
 827                                 ino = read_longint(f);
 828                         }
 829                         np = idev_node(dev, ino);
 830                         ndx = (int32)(long)np->data - 1;
 831                         if (ndx < 0) {
 832                                 ndx = cnt++;
 833                                 np->data = (void*)(long)cnt;
 834                         }
 835                         F_HL_GNUM(file) = ndx;
 836                 }
 837         }
 838 #endif
 839
 840         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 841                 if (S_ISREG(mode))
 842                         bp = (char*)F_SUM(file);
 843                 else {
 844                         /* Prior to 28, we get a useless set of nulls. */
 845                         bp = tmp_sum;
 846                 }
 847                 if (first_hlink_ndx >= 0) {
 848                         struct file_struct *first = flist->files[first_hlink_ndx];
 849                         memcpy(bp, F_SUM(first), checksum_len);
 850                 } else
 851                         read_buf(f, bp, checksum_len);
 852         }
 853
 854         if (S_ISREG(mode) || S_ISLNK(mode))
 855                 stats.total_size += file_length;
 856
 857         return file;
 858 }
 859
 860 /**
 861  * Create a file_struct for a named file by reading its stat()
 862  * information and performing extensive checks against global
 863  * options.
 864  *
 865  * @return the new file, or NULL if there was an error or this file
 866  * should be excluded.
 867  *
 868  * @todo There is a small optimization opportunity here to avoid
 869  * stat()ing the file in some circumstances, which has a certain cost.
 870  * We are called immediately after doing readdir(), and so we may
 871  * already know the d_type of the file.  We could for example avoid
 872  * statting directories if we're not recursing, but this is not a very
 873  * important case.  Some systems may not have d_type.
 874  **/
 875 struct file_struct *make_file(const char *fname, struct file_list *flist,
 876                               STRUCT_STAT *stp, int flags, int filter_level)
 877 {
 878         static char *lastdir;
 879         static int lastdir_len = -1;
 880         struct file_struct *file;
 881         STRUCT_STAT st;
 882         char thisname[MAXPATHLEN];
 883         char linkname[MAXPATHLEN];
 884         int alloc_len, basename_len, linkname_len;
 885         int extra_len = file_extra_cnt * EXTRA_LEN;
 886         const char *basename;
 887         char *bp;
 888
 889         if (strlcpy(thisname, fname, sizeof thisname)
 890             >= sizeof thisname - flist_dir_len) {
 891                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 892                 return NULL;
 893         }
 894         clean_fname(thisname, 0);
 895         if (sanitize_paths)
 896                 sanitize_path(thisname, thisname, "", 0, NULL);
 897
 898         if (stp && S_ISDIR(stp->st_mode)) {
 899                 st = *stp; /* Needed for "symlink/." with --relative. */
 900                 *linkname = '\0'; /* make IBM code checker happy */
 901         } else if (readlink_stat(thisname, &st, linkname) != 0) {
 902                 int save_errno = errno;
 903                 /* See if file is excluded before reporting an error. */
 904                 if (filter_level != NO_FILTERS
 905                  && (is_excluded(thisname, 0, filter_level)
 906                   || is_excluded(thisname, 1, filter_level))) {
 907                         if (ignore_perishable && save_errno != ENOENT)
 908                                 non_perishable_cnt++;
 909                         return NULL;
 910                 }
 911                 if (save_errno == ENOENT) {
 912 #ifdef SUPPORT_LINKS
 913                         /* Avoid "vanished" error if symlink points nowhere. */
 914                         if (copy_links && do_lstat(thisname, &st) == 0
 915                             && S_ISLNK(st.st_mode)) {
 916                                 io_error |= IOERR_GENERAL;
 917                                 rprintf(FERROR, "symlink has no referent: %s\n",
 918                                         full_fname(thisname));
 919                         } else
 920 #endif
 921                         {
 922                                 enum logcode c = am_daemon && protocol_version < 28
 923                                     ? FERROR : FINFO;
 924                                 io_error |= IOERR_VANISHED;
 925                                 rprintf(c, "file has vanished: %s\n",
 926                                         full_fname(thisname));
 927                         }
 928                 } else {
 929                         io_error |= IOERR_GENERAL;
 930                         rsyserr(FERROR, save_errno, "readlink %s failed",
 931                                 full_fname(thisname));
 932                 }
 933                 return NULL;
 934         }
 935
 936         /* backup.c calls us with filter_level set to NO_FILTERS. */
 937         if (filter_level == NO_FILTERS)
 938                 goto skip_filters;
 939
 940         if (S_ISDIR(st.st_mode) && !xfer_dirs) {
 941                 rprintf(FINFO, "skipping directory %s\n", thisname);
 942                 return NULL;
 943         }
 944
 945         /* -x only affects directories because we need to avoid recursing
 946          * into a mount-point directory, not to avoid copying a symlinked
 947          * file if -L (or similar) was specified. */
 948         if (one_file_system && st.st_dev != filesystem_dev
 949          && S_ISDIR(st.st_mode)) {
 950                 if (one_file_system > 1) {
 951                         if (verbose > 2) {
 952                                 rprintf(FINFO, "skipping mount-point dir %s\n",
 953                                         thisname);
 954                         }
 955                         return NULL;
 956                 }
 957                 flags |= FLAG_MOUNT_DIR;
 958         }
 959
 960         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level)) {
 961                 if (ignore_perishable)
 962                         non_perishable_cnt++;
 963                 return NULL;
 964         }
 965
 966         if (lp_ignore_nonreadable(module_id)) {
 967 #ifdef SUPPORT_LINKS
 968                 if (!S_ISLNK(st.st_mode))
 969 #endif
 970                         if (access(thisname, R_OK) != 0)
 971                                 return NULL;
 972         }
 973
 974   skip_filters:
 975
 976         /* Only divert a directory in the main transfer. */
 977         if (flist && flist->prev && S_ISDIR(st.st_mode)
 978          && flags & FLAG_DIVERT_DIRS) {
 979                 flist = dir_flist;
 980                 /* Room for parent/sibling/next-child info. */
 981                 extra_len += 3 * EXTRA_LEN;
 982         }
 983
 984         if (verbose > 2) {
 985                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 986                         who_am_i(), thisname, filter_level);
 987         }
 988
 989         if ((basename = strrchr(thisname, '/')) != NULL) {
 990                 int len = basename++ - thisname;
 991                 if (len != lastdir_len || memcmp(thisname, lastdir, len) != 0) {
 992                         lastdir = new_array(char, len + 1);
 993                         memcpy(lastdir, thisname, len);
 994                         lastdir[len] = '\0';
 995                         lastdir_len = len;
 996                 }
 997         } else
 998                 basename = thisname;
 999         basename_len = strlen(basename) + 1; /* count the '\0' */
1000
1001 #ifdef SUPPORT_LINKS
1002         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
1003 #else
1004         linkname_len = 0;
1005 #endif
1006
1007         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode))
1008                 extra_len += EXTRA_LEN;
1009
1010 #if EXTRA_ROUNDING > 0
1011         if (extra_len & (EXTRA_ROUNDING * EXTRA_LEN))
1012                 extra_len = (extra_len | (EXTRA_ROUNDING * EXTRA_LEN)) + EXTRA_LEN;
1013 #endif
1014
1015         alloc_len = FILE_STRUCT_LEN + extra_len + basename_len
1016                   + linkname_len;
1017         if (flist)
1018                 bp = pool_alloc(flist->file_pool, alloc_len, "make_file");
1019         else {
1020                 if (!(bp = new_array(char, alloc_len)))
1021                         out_of_memory("make_file");
1022         }
1023
1024         memset(bp, 0, extra_len + FILE_STRUCT_LEN);
1025         bp += extra_len;
1026         file = (struct file_struct *)bp;
1027         bp += FILE_STRUCT_LEN;
1028
1029         memcpy(bp, basename, basename_len);
1030         bp += basename_len + linkname_len; /* skip space for symlink too */
1031
1032 #ifdef SUPPORT_HARD_LINKS
1033         if (preserve_hard_links && flist && flist->prev) {
1034                 if (protocol_version >= 28
1035                  ? (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
1036                  : S_ISREG(st.st_mode)) {
1037                         tmp_dev = st.st_dev;
1038                         tmp_ino = st.st_ino;
1039                 } else
1040                         tmp_dev = 0;
1041         }
1042 #endif
1043
1044 #ifdef HAVE_STRUCT_STAT_ST_RDEV
1045         if (IS_DEVICE(st.st_mode) || IS_SPECIAL(st.st_mode)) {
1046                 tmp_rdev = st.st_rdev;
1047                 st.st_size = 0;
1048         }
1049 #endif
1050
1051         file->flags = flags;
1052         file->modtime = st.st_mtime;
1053         file->len32 = (uint32)st.st_size;
1054         if (st.st_size > 0xFFFFFFFFu && S_ISREG(st.st_mode)) {
1055                 file->flags |= FLAG_LENGTH64;
1056                 OPT_EXTRA(file, 0)->unum = (uint32)(st.st_size >> 32);
1057         }
1058         file->mode = st.st_mode;
1059         if (preserve_uid)
1060                 F_OWNER(file) = st.st_uid;
1061         if (preserve_gid)
1062                 F_GROUP(file) = st.st_gid;
1063
1064         if (basename != thisname)
1065                 file->dirname = lastdir;
1066
1067 #ifdef SUPPORT_LINKS
1068         if (linkname_len) {
1069                 bp = (char*)file->basename + basename_len;
1070                 memcpy(bp, linkname, linkname_len);
1071         }
1072 #endif
1073
1074         if (always_checksum && am_sender && S_ISREG(st.st_mode))
1075                 file_checksum(thisname, tmp_sum, st.st_size);
1076
1077         F_ROOTDIR(file) = flist_dir;
1078
1079         /* This code is only used by the receiver when it is building
1080          * a list of files for a delete pass. */
1081         if (keep_dirlinks && linkname_len && flist) {
1082                 STRUCT_STAT st2;
1083                 int save_mode = file->mode;
1084                 file->mode = S_IFDIR; /* Find a directory with our name. */
1085                 if (flist_find(dir_flist, file) >= 0
1086                     && do_stat(thisname, &st2) == 0 && S_ISDIR(st2.st_mode)) {
1087                         file->modtime = st2.st_mtime;
1088                         file->len32 = 0;
1089                         file->mode = st2.st_mode;
1090                         if (preserve_uid)
1091                                 F_OWNER(file) = st2.st_uid;
1092                         if (preserve_gid)
1093                                 F_GROUP(file) = st2.st_gid;
1094                 } else
1095                         file->mode = save_mode;
1096         }
1097
1098         if (basename_len == 0+1)
1099                 return NULL;
1100
1101         if (inc_recurse && flist == dir_flist) {
1102                 flist_expand(flist);
1103                 flist->files[flist->count++] = file;
1104         }
1105
1106         return file;
1107 }
1108
1109 /* Only called for temporary file_struct entries created by make_file(). */
1110 void unmake_file(struct file_struct *file)
1111 {
1112         int extra_cnt = file_extra_cnt + LEN64_BUMP(file);
1113 #if EXTRA_ROUNDING > 0
1114         if (extra_cnt & EXTRA_ROUNDING)
1115                 extra_cnt = (extra_cnt | EXTRA_ROUNDING) + 1;
1116 #endif
1117         free(REQ_EXTRA(file, extra_cnt));
1118 }
1119
1120 static struct file_struct *send_file_name(int f, struct file_list *flist,
1121                                           char *fname, STRUCT_STAT *stp,
1122                                           int flags, int filter_flags)
1123 {
1124         struct file_struct *file;
1125
1126         file = make_file(fname, flist, stp, flags, filter_flags);
1127         if (!file)
1128                 return NULL;
1129
1130         if (chmod_modes && !S_ISLNK(file->mode))
1131                 file->mode = tweak_mode(file->mode, chmod_modes);
1132
1133         maybe_emit_filelist_progress(flist->count + flist_count_offset);
1134
1135         flist_expand(flist);
1136         flist->files[flist->count++] = file;
1137         if (f >= 0)
1138                 send_file_entry(f, file, flist->count - 1);
1139         return file;
1140 }
1141
1142 static void send_if_directory(int f, struct file_list *flist,
1143                               struct file_struct *file,
1144                               char *fbuf, unsigned int ol,
1145                               int flags)
1146 {
1147         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1148
1149         if (S_ISDIR(file->mode)
1150             && !(file->flags & FLAG_MOUNT_DIR) && f_name(file, fbuf)) {
1151                 void *save_filters;
1152                 unsigned int len = strlen(fbuf);
1153                 if (len > 1 && fbuf[len-1] == '/')
1154                         fbuf[--len] = '\0';
1155                 if (len >= MAXPATHLEN - 1) {
1156                         io_error |= IOERR_GENERAL;
1157                         rprintf(FERROR, "skipping long-named directory: %s\n",
1158                                 full_fname(fbuf));
1159                         return;
1160                 }
1161                 save_filters = push_local_filters(fbuf, len);
1162                 send_directory(f, flist, -1, fbuf, len, flags);
1163                 pop_local_filters(save_filters);
1164                 fbuf[ol] = '\0';
1165                 if (is_dot_dir)
1166                         fbuf[ol-1] = '.';
1167         }
1168 }
1169
1170 static int file_compare(struct file_struct **file1, struct file_struct **file2)
1171 {
1172         return f_name_cmp(*file1, *file2);
1173 }
1174
1175 /* We take an entire set of sibling dirs from dir_flist (start <= ndx <= end),
1176  * sort them by name, and link them into the tree, setting the appropriate
1177  * parent/child/sibling pointers. */
1178 static void add_dirs_to_tree(int parent_ndx, int start, int end)
1179 {
1180         int i;
1181         int32 *dp = NULL;
1182         int32 *parent_dp = parent_ndx < 0 ? NULL
1183                          : F_DIRNODE_P(dir_flist->files[parent_ndx]);
1184
1185         qsort(dir_flist->files + start, end - start + 1,
1186               sizeof dir_flist->files[0], (int (*)())file_compare);
1187
1188         for (i = start; i <= end; i++) {
1189                 struct file_struct *file = dir_flist->files[i];
1190                 if (!(file->flags & FLAG_XFER_DIR)
1191                  || file->flags & FLAG_MOUNT_DIR)
1192                         continue;
1193                 if (dp)
1194                         DIR_NEXT_SIBLING(dp) = i;
1195                 else if (parent_dp)
1196                         DIR_FIRST_CHILD(parent_dp) = i;
1197                 else
1198                         send_dir_ndx = i;
1199                 dp = F_DIRNODE_P(file);
1200                 DIR_PARENT(dp) = parent_ndx;
1201                 DIR_FIRST_CHILD(dp) = -1;
1202         }
1203         if (dp)
1204                 DIR_NEXT_SIBLING(dp) = -1;
1205 }
1206
1207 /* This function is normally called by the sender, but the receiving side also
1208  * calls it from get_dirlist() with f set to -1 so that we just construct the
1209  * file list in memory without sending it over the wire.  Also, get_dirlist()
1210  * might call this with f set to -2, which also indicates that local filter
1211  * rules should be ignored. */
1212 static void send_directory(int f, struct file_list *flist, int parent_ndx,
1213                            char *fbuf, int len, int flags)
1214 {
1215         struct dirent *di;
1216         unsigned remainder;
1217         char *p;
1218         DIR *d;
1219         int divert_dirs = (flags & FLAG_DIVERT_DIRS) != 0;
1220         int start = divert_dirs ? dir_flist->count : flist->count;
1221         int filter_flags = f == -2 ? SERVER_FILTERS : ALL_FILTERS;
1222
1223         assert(flist != NULL);
1224
1225         if (!(d = opendir(fbuf))) {
1226                 io_error |= IOERR_GENERAL;
1227                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1228                 return;
1229         }
1230
1231         p = fbuf + len;
1232         if (len != 1 || *fbuf != '/')
1233                 *p++ = '/';
1234         *p = '\0';
1235         remainder = MAXPATHLEN - (p - fbuf);
1236
1237         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1238                 char *dname = d_name(di);
1239                 if (dname[0] == '.' && (dname[1] == '\0'
1240                     || (dname[1] == '.' && dname[2] == '\0')))
1241                         continue;
1242                 if (strlcpy(p, dname, remainder) >= remainder) {
1243                         io_error |= IOERR_GENERAL;
1244                         rprintf(FINFO,
1245                                 "cannot send long-named file %s\n",
1246                                 full_fname(fbuf));
1247                         continue;
1248                 }
1249
1250                 send_file_name(f, flist, fbuf, NULL, flags, filter_flags);
1251         }
1252
1253         fbuf[len] = '\0';
1254
1255         if (errno) {
1256                 io_error |= IOERR_GENERAL;
1257                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1258         }
1259
1260         closedir(d);
1261
1262         if (f < 0)
1263                 return;
1264
1265         if (divert_dirs)
1266                 add_dirs_to_tree(parent_ndx, start, dir_flist->count - 1);
1267         else if (recurse) {
1268                 int i, end = flist->count - 1;
1269                 /* send_if_directory() bumps flist->count, so use "end". */
1270                 for (i = start; i <= end; i++)
1271                         send_if_directory(f, flist, flist->files[i], fbuf, len, flags);
1272         }
1273 }
1274
1275 void send_extra_file_list(int f, int at_least)
1276 {
1277         char fbuf[MAXPATHLEN];
1278         struct file_list *flist;
1279         int64 start_write;
1280         int future_cnt, save_io_error = io_error;
1281
1282         if (send_dir_ndx < 0)
1283                 return;
1284
1285         /* Keep sending data until we have the requested number of
1286          * files in the upcoming file-lists. */
1287         if (cur_flist->next) {
1288                 flist = first_flist->prev; /* the newest flist */
1289                 future_cnt = flist->count
1290                            + flist->ndx_start - cur_flist->next->ndx_start;
1291         } else
1292                 future_cnt = 0;
1293         while (future_cnt < at_least) {
1294                 struct file_struct *file = dir_flist->files[send_dir_ndx];
1295                 int32 *dp;
1296                 int dlen;
1297
1298                 f_name(file, fbuf);
1299                 dlen = strlen(fbuf);
1300
1301                 if (F_ROOTDIR(file) != flist_dir) {
1302                         if (!push_flist_dir(F_ROOTDIR(file), -1))
1303                                 exit_cleanup(RERR_FILESELECT);
1304                 }
1305
1306                 flist = flist_new(0, "send_extra_file_list");
1307                 start_write = stats.total_written;
1308
1309                 write_ndx(f, NDX_FLIST_OFFSET - send_dir_ndx);
1310                 change_local_filter_dir(fbuf, dlen, send_dir_depth);
1311                 send_directory(f, flist, send_dir_ndx, fbuf, dlen, FLAG_DIVERT_DIRS | FLAG_XFER_DIR);
1312                 write_byte(f, 0);
1313
1314                 clean_flist(flist, 0, 0);
1315                 file_total += flist->count;
1316                 future_cnt += flist->count;
1317                 stats.flist_size += stats.total_written - start_write;
1318                 stats.num_files += flist->count;
1319                 if (verbose > 3)
1320                         output_flist(flist);
1321
1322                 dp = F_DIRNODE_P(file);
1323                 if (DIR_FIRST_CHILD(dp) >= 0) {
1324                         send_dir_ndx = DIR_FIRST_CHILD(dp);
1325                         send_dir_depth++;
1326                 } else {
1327                         while (DIR_NEXT_SIBLING(dp) < 0) {
1328                                 if ((send_dir_ndx = DIR_PARENT(dp)) < 0) {
1329                                         write_ndx(f, NDX_FLIST_EOF);
1330                                         flist_eof = 1;
1331                                         change_local_filter_dir(NULL, 0, 0);
1332                                         goto finish;
1333                                 }
1334                                 send_dir_depth--;
1335                                 file = dir_flist->files[send_dir_ndx];
1336                                 dp = F_DIRNODE_P(file);
1337                         }
1338                         send_dir_ndx = DIR_NEXT_SIBLING(dp);
1339                 }
1340         }
1341
1342   finish:
1343         if (io_error != save_io_error && !ignore_errors)
1344                 send_msg_int(MSG_IO_ERROR, io_error);
1345 }
1346
1347 struct file_list *send_file_list(int f, int argc, char *argv[])
1348 {
1349         int len;
1350         STRUCT_STAT st;
1351         char *p, *dir;
1352         char lastpath[MAXPATHLEN] = "";
1353         struct file_list *flist;
1354         struct timeval start_tv, end_tv;
1355         int64 start_write;
1356         int use_ff_fd = 0;
1357         int flags, disable_buffering;
1358
1359         rprintf(FLOG, "building file list\n");
1360         if (show_filelist_p())
1361                 start_filelist_progress("building file list");
1362         else if (inc_recurse && verbose && !am_server)
1363                 rprintf(FCLIENT, "sending incremental file list\n");
1364
1365         start_write = stats.total_written;
1366         gettimeofday(&start_tv, NULL);
1367
1368 #ifdef SUPPORT_HARD_LINKS
1369         if (preserve_hard_links && protocol_version >= 30 && !cur_flist)
1370                 init_hard_links();
1371 #endif
1372
1373         flist = cur_flist = flist_new(0, "send_file_list");
1374         if (inc_recurse) {
1375                 dir_flist = flist_new(FLIST_TEMP, "send_file_list");
1376                 flags = FLAG_DIVERT_DIRS;
1377         } else {
1378                 dir_flist = cur_flist;
1379                 flags = 0;
1380         }
1381
1382         disable_buffering = io_start_buffering_out(f);
1383         if (filesfrom_fd >= 0) {
1384                 if (argv[0] && !push_dir(argv[0], 0)) {
1385                         rsyserr(FERROR, errno, "push_dir %s failed",
1386                                 full_fname(argv[0]));
1387                         exit_cleanup(RERR_FILESELECT);
1388                 }
1389                 use_ff_fd = 1;
1390         }
1391
1392         while (1) {
1393                 char fbuf[MAXPATHLEN];
1394                 char *fn;
1395                 int is_dot_dir;
1396
1397                 if (use_ff_fd) {
1398                         if (read_filesfrom_line(filesfrom_fd, fbuf) == 0)
1399                                 break;
1400                         sanitize_path(fbuf, fbuf, "", 0, NULL);
1401                 } else {
1402                         if (argc-- == 0)
1403                                 break;
1404                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1405                         if (sanitize_paths)
1406                                 sanitize_path(fbuf, fbuf, "", 0, NULL);
1407                 }
1408
1409                 len = strlen(fbuf);
1410                 if (relative_paths) {
1411                         /* We clean up fbuf below. */
1412                         is_dot_dir = 0;
1413                 } else if (!len || fbuf[len - 1] == '/') {
1414                         if (len == 2 && fbuf[0] == '.') {
1415                                 /* Turn "./" into just "." rather than "./." */
1416                                 fbuf[1] = '\0';
1417                         } else {
1418                                 if (len + 1 >= MAXPATHLEN)
1419                                         overflow_exit("send_file_list");
1420                                 fbuf[len++] = '.';
1421                                 fbuf[len] = '\0';
1422                         }
1423                         is_dot_dir = 1;
1424                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1425                     && (len == 2 || fbuf[len-3] == '/')) {
1426                         if (len + 2 >= MAXPATHLEN)
1427                                 overflow_exit("send_file_list");
1428                         fbuf[len++] = '/';
1429                         fbuf[len++] = '.';
1430                         fbuf[len] = '\0';
1431                         is_dot_dir = 1;
1432                 } else {
1433                         is_dot_dir = fbuf[len-1] == '.'
1434                                    && (len == 1 || fbuf[len-2] == '/');
1435                 }
1436
1437                 if (link_stat(fbuf, &st, copy_dirlinks) != 0) {
1438                         io_error |= IOERR_GENERAL;
1439                         rsyserr(FERROR, errno, "link_stat %s failed",
1440                                 full_fname(fbuf));
1441                         continue;
1442                 }
1443
1444                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1445                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1446                         continue;
1447                 }
1448
1449                 dir = NULL;
1450
1451                 if (!relative_paths) {
1452                         p = strrchr(fbuf, '/');
1453                         if (p) {
1454                                 *p = '\0';
1455                                 if (p == fbuf)
1456                                         dir = "/";
1457                                 else
1458                                         dir = fbuf;
1459                                 len -= p - fbuf + 1;
1460                                 fn = p + 1;
1461                         } else
1462                                 fn = fbuf;
1463                 } else {
1464                         if ((p = strstr(fbuf, "/./")) != NULL) {
1465                                 *p = '\0';
1466                                 if (p == fbuf)
1467                                         dir = "/";
1468                                 else
1469                                         dir = fbuf;
1470                                 len -= p - fbuf + 3;
1471                                 fn = p + 3;
1472                         } else
1473                                 fn = fbuf;
1474                         /* Get rid of trailing "/" and "/.". */
1475                         while (len) {
1476                                 if (fn[len - 1] == '/') {
1477                                         is_dot_dir = 1;
1478                                         if (!--len && !dir) {
1479                                                 len++;
1480                                                 break;
1481                                         }
1482                                 }
1483                                 else if (len >= 2 && fn[len - 1] == '.'
1484                                                   && fn[len - 2] == '/') {
1485                                         is_dot_dir = 1;
1486                                         if (!(len -= 2) && !dir) {
1487                                                 len++;
1488                                                 break;
1489                                         }
1490                                 } else
1491                                         break;
1492                         }
1493                         if (len == 1 && fn[0] == '/')
1494                                 fn[len++] = '.';
1495                         fn[len] = '\0';
1496                         /* Reject a ".." dir in the active part of the path. */
1497                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1498                                 if ((p[2] == '/' || p[2] == '\0')
1499                                  && (p == fn || p[-1] == '/')) {
1500                                         rprintf(FERROR,
1501                                             "found \"..\" dir in relative path: %s\n",
1502                                             fbuf);
1503                                         exit_cleanup(RERR_SYNTAX);
1504                                 }
1505                         }
1506                 }
1507
1508                 if (!*fn) {
1509                         len = 1;
1510                         fn = ".";
1511                 }
1512
1513                 if (dir && *dir) {
1514                         static const char *lastdir;
1515                         static int lastdir_len = -1;
1516                         int len = strlen(dir);
1517
1518                         if (len != lastdir_len || memcmp(lastdir, dir, len) != 0) {
1519                                 if (!push_flist_dir(strdup(dir), len))
1520                                         goto push_error;
1521                                 lastdir = flist_dir;
1522                                 lastdir_len = flist_dir_len;
1523                         } else if (!push_flist_dir(lastdir, lastdir_len)) {
1524                           push_error:
1525                                 io_error |= IOERR_GENERAL;
1526                                 rsyserr(FERROR, errno, "push_dir %s failed",
1527                                         full_fname(dir));
1528                                 continue;
1529                         }
1530                 }
1531
1532                 if (fn != fbuf)
1533                         memmove(fbuf, fn, len + 1);
1534
1535                 if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1536                         /* Send the implied directories at the start of the
1537                          * source spec, so we get their permissions right. */
1538                         char *lp = lastpath, *slash = fbuf;
1539                         *p = '\0';
1540                         /* Skip any initial directories in our path that we
1541                          * have in common with lastpath. */
1542                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1543                                 if (*fn == '/')
1544                                         slash = fn;
1545                         }
1546                         *p = '/';
1547                         if (fn != p || (*lp && *lp != '/')) {
1548                                 int save_copy_links = copy_links;
1549                                 int save_xfer_dirs = xfer_dirs;
1550                                 int dir_flags = inc_recurse ? FLAG_DIVERT_DIRS : 0;
1551                                 copy_links |= copy_unsafe_links;
1552                                 xfer_dirs = 1;
1553                                 while ((slash = strchr(slash+1, '/')) != 0) {
1554                                         *slash = '\0';
1555                                         send_file_name(f, flist, fbuf, NULL,
1556                                                        dir_flags, ALL_FILTERS);
1557                                         *slash = '/';
1558                                 }
1559                                 copy_links = save_copy_links;
1560                                 xfer_dirs = save_xfer_dirs;
1561                                 *p = '\0';
1562                                 strlcpy(lastpath, fbuf, sizeof lastpath);
1563                                 *p = '/';
1564                         }
1565                 }
1566
1567                 if (one_file_system)
1568                         filesystem_dev = st.st_dev;
1569
1570                 if (recurse || (xfer_dirs && is_dot_dir)) {
1571                         struct file_struct *file;
1572                         int top_flags = FLAG_TOP_DIR | FLAG_XFER_DIR
1573                                       | (is_dot_dir ? 0 : flags)
1574                                       | (inc_recurse ? FLAG_DIVERT_DIRS : 0);
1575                         file = send_file_name(f, flist, fbuf, &st,
1576                                               top_flags, ALL_FILTERS);
1577                         if (file && !inc_recurse)
1578                                 send_if_directory(f, flist, file, fbuf, len, flags);
1579                 } else
1580                         send_file_name(f, flist, fbuf, &st, flags, ALL_FILTERS);
1581         }
1582
1583         gettimeofday(&end_tv, NULL);
1584         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1585                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1586         if (stats.flist_buildtime == 0)
1587                 stats.flist_buildtime = 1;
1588         start_tv = end_tv;
1589
1590         write_byte(f, 0); /* Indicate end of file list */
1591
1592 #ifdef SUPPORT_HARD_LINKS
1593         if (preserve_hard_links && protocol_version >= 30 && !inc_recurse)
1594                 idev_destroy();
1595 #endif
1596
1597         if (show_filelist_p())
1598                 finish_filelist_progress(flist);
1599
1600         gettimeofday(&end_tv, NULL);
1601         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1602                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1603
1604         /* Sort the list without removing any duplicates in non-incremental
1605          * mode.  This allows the receiving side to ask for whatever name it
1606          * kept.  For incremental mode, the sender also removes duplicates
1607          * in this initial file-list so that it avoids re-sending duplicated
1608          * directories. */
1609         clean_flist(flist, 0, inc_recurse);
1610         file_total += flist->count;
1611
1612         if (!numeric_ids && !inc_recurse)
1613                 send_uid_list(f);
1614
1615         /* send the io_error flag */
1616         if (protocol_version < 30)
1617                 write_int(f, ignore_errors ? 0 : io_error);
1618         else if (io_error && !ignore_errors)
1619                 send_msg_int(MSG_IO_ERROR, io_error);
1620
1621         if (disable_buffering)
1622                 io_end_buffering_out();
1623
1624         stats.flist_size = stats.total_written - start_write;
1625         stats.num_files = flist->count;
1626
1627         if (verbose > 3)
1628                 output_flist(flist);
1629
1630         if (verbose > 2)
1631                 rprintf(FINFO, "send_file_list done\n");
1632
1633         if (inc_recurse) {
1634                 add_dirs_to_tree(-1, 0, dir_flist->count - 1);
1635                 if (file_total == 1) {
1636                         /* If we're creating incremental file-lists and there
1637                          * was just 1 item in the first file-list, send 1 more
1638                          * file-list to check if this is a 1-file xfer. */
1639                         if (send_dir_ndx < 0)
1640                                 write_ndx(f, NDX_DONE);
1641                         else
1642                                 send_extra_file_list(f, 1);
1643                 }
1644         }
1645
1646         return flist;
1647 }
1648
1649 struct file_list *recv_file_list(int f)
1650 {
1651         struct file_list *flist;
1652         int dstart, flags;
1653         int64 start_read;
1654
1655         if (!first_flist)
1656                 rprintf(FLOG, "receiving file list\n");
1657         if (show_filelist_p())
1658                 start_filelist_progress("receiving file list");
1659         else if (inc_recurse && verbose && !am_server && !first_flist)
1660                 rprintf(FCLIENT, "receiving incremental file list\n");
1661
1662         start_read = stats.total_read;
1663
1664         flist = flist_new(0, "recv_file_list");
1665
1666 #ifdef SUPPORT_HARD_LINKS
1667         if (preserve_hard_links && protocol_version < 30)
1668                 init_hard_links();
1669 #endif
1670
1671         if (inc_recurse) {
1672                 if (flist->ndx_start == 0)
1673                         dir_flist = flist_new(FLIST_TEMP, "recv_file_list");
1674                 dstart = dir_flist->count;
1675         } else {
1676                 dir_flist = flist;
1677                 dstart = 0;
1678         }
1679
1680         while ((flags = read_byte(f)) != 0) {
1681                 struct file_struct *file;
1682
1683                 flist_expand(flist);
1684
1685                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1686                         flags |= read_byte(f) << 8;
1687                 file = recv_file_entry(flist, flags, f);
1688
1689                 if (inc_recurse && S_ISDIR(file->mode)) {
1690                         flist_expand(dir_flist);
1691                         dir_flist->files[dir_flist->count++] = file;
1692                 }
1693
1694                 flist->files[flist->count++] = file;
1695
1696                 maybe_emit_filelist_progress(flist->count);
1697
1698                 if (verbose > 2) {
1699                         rprintf(FINFO, "recv_file_name(%s)\n",
1700                                 f_name(file, NULL));
1701                 }
1702         }
1703         file_total += flist->count;
1704
1705         if (verbose > 2)
1706                 rprintf(FINFO, "received %d names\n", flist->count);
1707
1708         if (show_filelist_p())
1709                 finish_filelist_progress(flist);
1710
1711         clean_flist(flist, relative_paths, 1);
1712
1713         if (inc_recurse) {
1714                 qsort(dir_flist->files + dstart, dir_flist->count - dstart,
1715                       sizeof dir_flist->files[0], (int (*)())file_compare);
1716         } else if (f >= 0)
1717                 recv_uid_list(f, flist);
1718
1719         if (protocol_version < 30) {
1720                 /* Recv the io_error flag */
1721                 if (ignore_errors)
1722                         read_int(f);
1723                 else
1724                         io_error |= read_int(f);
1725         }
1726
1727         if (verbose > 3)
1728                 output_flist(flist);
1729
1730         if (list_only) {
1731                 int i;
1732                 for (i = 0; i < flist->count; i++)
1733                         list_file_entry(flist->files[i]);
1734         }
1735
1736         if (verbose > 2)
1737                 rprintf(FINFO, "recv_file_list done\n");
1738
1739         stats.flist_size += stats.total_read - start_read;
1740         stats.num_files += flist->count;
1741
1742         return flist;
1743 }
1744
1745 /* This is only used once by the receiver if the very first file-list
1746  * has exactly one item in it. */
1747 void recv_additional_file_list(int f)
1748 {
1749         struct file_list *flist;
1750         int ndx = read_ndx(f);
1751         if (ndx == NDX_DONE) {
1752                 flist_eof = 1;
1753                 change_local_filter_dir(NULL, 0, 0);
1754         } else {
1755                 ndx = NDX_FLIST_OFFSET - ndx;
1756                 if (ndx < 0 || ndx >= dir_flist->count) {
1757                         ndx = NDX_FLIST_OFFSET - ndx;
1758                         rprintf(FERROR,
1759                                 "Invalid dir index: %d (%d - %d)\n",
1760                                 ndx, NDX_FLIST_OFFSET,
1761                                 NDX_FLIST_OFFSET - dir_flist->count);
1762                         exit_cleanup(RERR_PROTOCOL);
1763                 }
1764                 flist = recv_file_list(f);
1765                 flist->parent_ndx = ndx;
1766         }
1767 }
1768
1769 /* Search for an identically-named item in the file list.  Note that the
1770  * items must agree in their directory-ness, or no match is returned. */
1771 int flist_find(struct file_list *flist, struct file_struct *f)
1772 {
1773         int low = flist->low, high = flist->high;
1774         int diff, mid, mid_up;
1775
1776         while (low <= high) {
1777                 mid = (low + high) / 2;
1778                 if (F_IS_ACTIVE(flist->files[mid]))
1779                         mid_up = mid;
1780                 else {
1781                         /* Scan for the next non-empty entry using the cached
1782                          * distance values.  If the value isn't fully up-to-
1783                          * date, update it. */
1784                         mid_up = mid + F_DEPTH(flist->files[mid]);
1785                         if (!F_IS_ACTIVE(flist->files[mid_up])) {
1786                                 do {
1787                                     mid_up += F_DEPTH(flist->files[mid_up]);
1788                                 } while (!F_IS_ACTIVE(flist->files[mid_up]));
1789                                 F_DEPTH(flist->files[mid]) = mid_up - mid;
1790                         }
1791                         if (mid_up > high) {
1792                                 /* If there's nothing left above us, set high to
1793                                  * a non-empty entry below us and continue. */
1794                                 high = mid - (int)flist->files[mid]->len32;
1795                                 if (!F_IS_ACTIVE(flist->files[high])) {
1796                                         do {
1797                                             high -= (int)flist->files[high]->len32;
1798                                         } while (!F_IS_ACTIVE(flist->files[high]));
1799                                         flist->files[mid]->len32 = mid - high;
1800                                 }
1801                                 continue;
1802                         }
1803                 }
1804                 diff = f_name_cmp(flist->files[mid_up], f);
1805                 if (diff == 0) {
1806                         if (protocol_version < 29
1807                             && S_ISDIR(flist->files[mid_up]->mode)
1808                             != S_ISDIR(f->mode))
1809                                 return -1;
1810                         return mid_up;
1811                 }
1812                 if (diff < 0)
1813                         low = mid_up + 1;
1814                 else
1815                         high = mid - 1;
1816         }
1817         return -1;
1818 }
1819
1820 /*
1821  * Free up any resources a file_struct has allocated
1822  * and clear the file.
1823  */
1824 void clear_file(struct file_struct *file)
1825 {
1826         /* The +1 zeros out the first char of the basename. */
1827         memset(file, 0, FILE_STRUCT_LEN + 1);
1828         /* In an empty entry, F_DEPTH() is an offset to the next non-empty
1829          * entry.  Likewise for len32 in the opposite direction.  We assume
1830          * that we're alone for now since flist_find() will adjust the counts
1831          * it runs into that aren't up-to-date. */
1832         file->len32 = F_DEPTH(file) = 1;
1833 }
1834
1835 /* Allocate a new file list. */
1836 struct file_list *flist_new(int flags, char *msg)
1837 {
1838         struct file_list *flist;
1839
1840         flist = new(struct file_list);
1841         if (!flist)
1842                 out_of_memory(msg);
1843
1844         memset(flist, 0, sizeof flist[0]);
1845
1846         if (!(flags & FLIST_TEMP)) {
1847                 if (first_flist) {
1848                         flist->ndx_start = first_flist->prev->ndx_start
1849                                          + first_flist->prev->count;
1850                 }
1851                 /* This is a doubly linked list with prev looping back to
1852                  * the end of the list, but the last next pointer is NULL. */
1853                 if (!first_flist)
1854                         first_flist = cur_flist = flist->prev = flist;
1855                 else {
1856                         flist->prev = first_flist->prev;
1857                         flist->prev->next = first_flist->prev = flist;
1858                 }
1859                 flist_cnt++;
1860         }
1861
1862         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0, out_of_memory, POOL_INTERN)))
1863                 out_of_memory(msg);
1864
1865         return flist;
1866 }
1867
1868 /* Free up all elements in a flist. */
1869 void flist_free(struct file_list *flist)
1870 {
1871         if (!flist->prev)
1872                 ; /* Was FLIST_TEMP dir-list. */
1873         else if (flist == flist->prev) {
1874                 first_flist = cur_flist = NULL;
1875                 file_total = 0;
1876                 flist_cnt = 0;
1877         } else {
1878                 if (flist == cur_flist)
1879                         cur_flist = flist->next;
1880                 if (flist == first_flist)
1881                         first_flist = first_flist->next;
1882                 else {
1883                         flist->prev->next = flist->next;
1884                         if (!flist->next)
1885                                 flist->next = first_flist;
1886                 }
1887                 flist->next->prev = flist->prev;
1888                 file_total -= flist->count;
1889                 flist_cnt--;
1890         }
1891
1892         pool_destroy(flist->file_pool);
1893         free(flist->files);
1894         free(flist);
1895 }
1896
1897 /*
1898  * This routine ensures we don't have any duplicate names in our file list.
1899  * duplicate names can cause corruption because of the pipelining
1900  */
1901 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1902 {
1903         char fbuf[MAXPATHLEN];
1904         int i, prev_i = 0;
1905
1906         if (!flist)
1907                 return;
1908         if (flist->count == 0) {
1909                 flist->high = -1;
1910                 return;
1911         }
1912
1913         qsort(flist->files, flist->count,
1914             sizeof flist->files[0], (int (*)())file_compare);
1915
1916         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1917                 if (F_IS_ACTIVE(flist->files[i])) {
1918                         prev_i = i;
1919                         break;
1920                 }
1921         }
1922         flist->low = prev_i;
1923         while (++i < flist->count) {
1924                 int j;
1925                 struct file_struct *file = flist->files[i];
1926
1927                 if (!F_IS_ACTIVE(file))
1928                         continue;
1929                 if (f_name_cmp(file, flist->files[prev_i]) == 0)
1930                         j = prev_i;
1931                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
1932                         int save_mode = file->mode;
1933                         /* Make sure that this directory doesn't duplicate a
1934                          * non-directory earlier in the list. */
1935                         flist->high = prev_i;
1936                         file->mode = S_IFREG;
1937                         j = flist_find(flist, file);
1938                         file->mode = save_mode;
1939                 } else
1940                         j = -1;
1941                 if (j >= 0) {
1942                         struct file_struct *fp = flist->files[j];
1943                         int keep, drop;
1944                         /* If one is a dir and the other is not, we want to
1945                          * keep the dir because it might have contents in the
1946                          * list. */
1947                         if (S_ISDIR(file->mode) != S_ISDIR(fp->mode)) {
1948                                 if (S_ISDIR(file->mode))
1949                                         keep = i, drop = j;
1950                                 else
1951                                         keep = j, drop = i;
1952                         } else if (protocol_version < 27)
1953                                 keep = j, drop = i;
1954                         else
1955                                 keep = i, drop = j;
1956                         if (verbose > 1 && !am_server) {
1957                                 rprintf(FINFO,
1958                                         "removing duplicate name %s from file list (%d)\n",
1959                                         f_name(file, fbuf), drop);
1960                         }
1961                         /* Make sure we don't lose track of a user-specified
1962                          * top directory. */
1963                         flist->files[keep]->flags |= flist->files[drop]->flags
1964                                                    & (FLAG_TOP_DIR|FLAG_XFER_DIR);
1965
1966                         clear_file(flist->files[drop]);
1967
1968                         if (keep == i) {
1969                                 if (flist->low == drop) {
1970                                         for (j = drop + 1;
1971                                              j < i && !F_IS_ACTIVE(flist->files[j]);
1972                                              j++) {}
1973                                         flist->low = j;
1974                                 }
1975                                 prev_i = i;
1976                         }
1977                 } else
1978                         prev_i = i;
1979         }
1980         flist->high = no_dups ? prev_i : flist->count - 1;
1981
1982         if (strip_root) {
1983                 /* We need to strip off the leading slashes for relative
1984                  * paths, but this must be done _after_ the sorting phase. */
1985                 for (i = flist->low; i <= flist->high; i++) {
1986                         struct file_struct *file = flist->files[i];
1987
1988                         if (!file->dirname)
1989                                 continue;
1990                         while (*file->dirname == '/')
1991                                 file->dirname++;
1992                         if (!*file->dirname)
1993                                 file->dirname = NULL;
1994                 }
1995         }
1996
1997         if (prune_empty_dirs && no_dups) {
1998                 int j, prev_depth = 0;
1999
2000                 prev_i = 0; /* It's OK that this isn't really true. */
2001
2002                 for (i = flist->low; i <= flist->high; i++) {
2003                         struct file_struct *fp, *file = flist->files[i];
2004
2005                         /* This temporarily abuses the F_DEPTH() value for a
2006                          * directory that is in a chain that might get pruned.
2007                          * We restore the old value if it gets a reprieve. */
2008                         if (S_ISDIR(file->mode) && F_DEPTH(file)) {
2009                                 /* Dump empty dirs when coming back down. */
2010                                 for (j = prev_depth; j >= F_DEPTH(file); j--) {
2011                                         fp = flist->files[prev_i];
2012                                         if (F_DEPTH(fp) >= 0)
2013                                                 break;
2014                                         prev_i = -F_DEPTH(fp)-1;
2015                                         clear_file(fp);
2016                                 }
2017                                 prev_depth = F_DEPTH(file);
2018                                 if (is_excluded(f_name(file, fbuf), 1,
2019                                                        ALL_FILTERS)) {
2020                                         /* Keep dirs through this dir. */
2021                                         for (j = prev_depth-1; ; j--) {
2022                                                 fp = flist->files[prev_i];
2023                                                 if (F_DEPTH(fp) >= 0)
2024                                                         break;
2025                                                 prev_i = -F_DEPTH(fp)-1;
2026                                                 F_DEPTH(fp) = j;
2027                                         }
2028                                 } else
2029                                         F_DEPTH(file) = -prev_i-1;
2030                                 prev_i = i;
2031                         } else {
2032                                 /* Keep dirs through this non-dir. */
2033                                 for (j = prev_depth; ; j--) {
2034                                         fp = flist->files[prev_i];
2035                                         if (F_DEPTH(fp) >= 0)
2036                                                 break;
2037                                         prev_i = -F_DEPTH(fp)-1;
2038                                         F_DEPTH(fp) = j;
2039                                 }
2040                         }
2041                 }
2042                 /* Dump all remaining empty dirs. */
2043                 while (1) {
2044                         struct file_struct *fp = flist->files[prev_i];
2045                         if (F_DEPTH(fp) >= 0)
2046                                 break;
2047                         prev_i = -F_DEPTH(fp)-1;
2048                         clear_file(fp);
2049                 }
2050
2051                 for (i = flist->low; i <= flist->high; i++) {
2052                         if (F_IS_ACTIVE(flist->files[i]))
2053                                 break;
2054                 }
2055                 flist->low = i;
2056                 for (i = flist->high; i >= flist->low; i--) {
2057                         if (F_IS_ACTIVE(flist->files[i]))
2058                                 break;
2059                 }
2060                 flist->high = i;
2061         }
2062 }
2063
2064 static void output_flist(struct file_list *flist)
2065 {
2066         char uidbuf[16], gidbuf[16], depthbuf[16];
2067         struct file_struct *file;
2068         const char *root, *dir, *slash, *name, *trail;
2069         const char *who = who_am_i();
2070         int i;
2071
2072         rprintf(FINFO, "[%s] flist start=%d, count=%d, low=%d, high=%d\n",
2073                 who, flist->ndx_start, flist->count, flist->low, flist->high);
2074         for (i = 0; i < flist->count; i++) {
2075                 file = flist->files[i];
2076                 if ((am_root || am_sender) && preserve_uid) {
2077                         snprintf(uidbuf, sizeof uidbuf, " uid=%ld",
2078                                  (long)F_UID(file));
2079                 } else
2080                         *uidbuf = '\0';
2081                 if (preserve_gid && F_GID(file) != GID_NONE) {
2082                         snprintf(gidbuf, sizeof gidbuf, " gid=%ld",
2083                                  (long)F_GID(file));
2084                 } else
2085                         *gidbuf = '\0';
2086                 if (!am_sender)
2087                         snprintf(depthbuf, sizeof depthbuf, "%d", F_DEPTH(file));
2088                 if (F_IS_ACTIVE(file)) {
2089                         root = am_sender ? NS(F_ROOTDIR(file)) : depthbuf;
2090                         if ((dir = file->dirname) == NULL)
2091                                 dir = slash = "";
2092                         else
2093                                 slash = "/";
2094                         name = file->basename;
2095                         trail = S_ISDIR(file->mode) ? "/" : "";
2096                 } else
2097                         root = dir = slash = name = trail = "";
2098                 rprintf(FINFO, "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
2099                         who, i, root, dir, slash, name, trail, (int)file->mode,
2100                         (double)F_LENGTH(file), uidbuf, gidbuf, file->flags);
2101         }
2102 }
2103
2104 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
2105 enum fnc_type { t_PATH, t_ITEM };
2106
2107 /* Compare the names of two file_struct entities, similar to how strcmp()
2108  * would do if it were operating on the joined strings.
2109  *
2110  * Some differences beginning with protocol_version 29: (1) directory names
2111  * are compared with an assumed trailing slash so that they compare in a
2112  * way that would cause them to sort immediately prior to any content they
2113  * may have; (2) a directory of any name compares after a non-directory of
2114  * any name at the same depth; (3) a directory with name "." compares prior
2115  * to anything else.  These changes mean that a directory and a non-dir
2116  * with the same name will not compare as equal (protocol_version >= 29).
2117  *
2118  * The dirname component can be an empty string, but the basename component
2119  * cannot (and never is in the current codebase).  The basename component
2120  * may be NULL (for a removed item), in which case it is considered to be
2121  * after any existing item. */
2122 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
2123 {
2124         int dif;
2125         const uchar *c1, *c2;
2126         enum fnc_state state1, state2;
2127         enum fnc_type type1, type2;
2128         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
2129
2130         if (!f1 || !F_IS_ACTIVE(f1)) {
2131                 if (!f2 || !F_IS_ACTIVE(f2))
2132                         return 0;
2133                 return -1;
2134         }
2135         if (!f2 || !F_IS_ACTIVE(f2))
2136                 return 1;
2137
2138         c1 = (uchar*)f1->dirname;
2139         c2 = (uchar*)f2->dirname;
2140         if (c1 == c2)
2141                 c1 = c2 = NULL;
2142         if (!c1) {
2143                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2144                 c1 = (const uchar*)f1->basename;
2145                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2146                         type1 = t_ITEM;
2147                         state1 = s_TRAILING;
2148                         c1 = (uchar*)"";
2149                 } else
2150                         state1 = s_BASE;
2151         } else {
2152                 type1 = t_path;
2153                 state1 = s_DIR;
2154         }
2155         if (!c2) {
2156                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2157                 c2 = (const uchar*)f2->basename;
2158                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2159                         type2 = t_ITEM;
2160                         state2 = s_TRAILING;
2161                         c2 = (uchar*)"";
2162                 } else
2163                         state2 = s_BASE;
2164         } else {
2165                 type2 = t_path;
2166                 state2 = s_DIR;
2167         }
2168
2169         if (type1 != type2)
2170                 return type1 == t_PATH ? 1 : -1;
2171
2172         do {
2173                 if (!*c1) {
2174                         switch (state1) {
2175                         case s_DIR:
2176                                 state1 = s_SLASH;
2177                                 c1 = (uchar*)"/";
2178                                 break;
2179                         case s_SLASH:
2180                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
2181                                 c1 = (const uchar*)f1->basename;
2182                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
2183                                         type1 = t_ITEM;
2184                                         state1 = s_TRAILING;
2185                                         c1 = (uchar*)"";
2186                                 } else
2187                                         state1 = s_BASE;
2188                                 break;
2189                         case s_BASE:
2190                                 state1 = s_TRAILING;
2191                                 if (type1 == t_PATH) {
2192                                         c1 = (uchar*)"/";
2193                                         break;
2194                                 }
2195                                 /* FALL THROUGH */
2196                         case s_TRAILING:
2197                                 type1 = t_ITEM;
2198                                 break;
2199                         }
2200                         if (*c2 && type1 != type2)
2201                                 return type1 == t_PATH ? 1 : -1;
2202                 }
2203                 if (!*c2) {
2204                         switch (state2) {
2205                         case s_DIR:
2206                                 state2 = s_SLASH;
2207                                 c2 = (uchar*)"/";
2208                                 break;
2209                         case s_SLASH:
2210                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
2211                                 c2 = (const uchar*)f2->basename;
2212                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
2213                                         type2 = t_ITEM;
2214                                         state2 = s_TRAILING;
2215                                         c2 = (uchar*)"";
2216                                 } else
2217                                         state2 = s_BASE;
2218                                 break;
2219                         case s_BASE:
2220                                 state2 = s_TRAILING;
2221                                 if (type2 == t_PATH) {
2222                                         c2 = (uchar*)"/";
2223                                         break;
2224                                 }
2225                                 /* FALL THROUGH */
2226                         case s_TRAILING:
2227                                 if (!*c1)
2228                                         return 0;
2229                                 type2 = t_ITEM;
2230                                 break;
2231                         }
2232                         if (type1 != type2)
2233                                 return type1 == t_PATH ? 1 : -1;
2234                 }
2235         } while ((dif = (int)*c1++ - (int)*c2++) == 0);
2236
2237         return dif;
2238 }
2239
2240 char *f_name_buf(void)
2241 {
2242         static char names[5][MAXPATHLEN];
2243         static unsigned int n;
2244
2245         n = (n + 1) % (sizeof names / sizeof names[0]);
2246
2247         return names[n];
2248 }
2249
2250 /* Return a copy of the full filename of a flist entry, using the indicated
2251  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
2252  * done because we checked the size when creating the file_struct entry.
2253  */
2254 char *f_name(struct file_struct *f, char *fbuf)
2255 {
2256         if (!f || !F_IS_ACTIVE(f))
2257                 return NULL;
2258
2259         if (!fbuf)
2260                 fbuf = f_name_buf();
2261
2262         if (f->dirname) {
2263                 int len = strlen(f->dirname);
2264                 memcpy(fbuf, f->dirname, len);
2265                 fbuf[len] = '/';
2266                 strlcpy(fbuf + len + 1, f->basename, MAXPATHLEN - (len + 1));
2267         } else
2268                 strlcpy(fbuf, f->basename, MAXPATHLEN);
2269
2270         return fbuf;
2271 }
2272
2273 /* Do a non-recursive scan of the named directory, possibly ignoring all
2274  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
2275  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
2276  * buffer (the functions we call will append names onto the end, but the old
2277  * dir value will be restored on exit). */
2278 struct file_list *get_dirlist(char *dirname, int dlen, int ignore_filter_rules)
2279 {
2280         struct file_list *dirlist;
2281         char dirbuf[MAXPATHLEN];
2282         int save_recurse = recurse;
2283         int save_xfer_dirs = xfer_dirs;
2284
2285         if (dlen < 0) {
2286                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
2287                 if (dlen >= MAXPATHLEN)
2288                         return NULL;
2289                 dirname = dirbuf;
2290         }
2291
2292         dirlist = flist_new(FLIST_TEMP, "get_dirlist");
2293
2294         recurse = 0;
2295         xfer_dirs = 1;
2296         send_directory(ignore_filter_rules ? -2 : -1, dirlist, -1, dirname, dlen, 0);
2297         xfer_dirs = save_xfer_dirs;
2298         recurse = save_recurse;
2299         if (do_progress)
2300                 flist_count_offset += dirlist->count;
2301
2302         clean_flist(dirlist, 0, 0);
2303
2304         if (verbose > 3)
2305                 output_flist(dirlist);
2306
2307         return dirlist;
2308 }