flist.c

   1 /*
   2    Copyright (C) Andrew Tridgell 1996
   3    Copyright (C) Paul Mackerras 1996
   4    Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 /** @file flist.c
  22  * Generate and receive file lists
  23  *
  24  * @sa http://lists.samba.org/pipermail/rsync/2000-June/002351.html
  25  *
  26  **/
  27
  28 #include "rsync.h"
  29
  30 extern int verbose;
  31 extern int dry_run;
  32 extern int list_only;
  33 extern int am_root;
  34 extern int am_server;
  35 extern int am_daemon;
  36 extern int am_sender;
  37 extern int do_progress;
  38 extern int always_checksum;
  39 extern int module_id;
  40 extern int ignore_errors;
  41 extern int numeric_ids;
  42 extern int recurse;
  43 extern int xfer_dirs;
  44 extern int filesfrom_fd;
  45 extern int one_file_system;
  46 extern int keep_dirlinks;
  47 extern int preserve_links;
  48 extern int preserve_hard_links;
  49 extern int preserve_perms;
  50 extern int preserve_devices;
  51 extern int preserve_uid;
  52 extern int preserve_gid;
  53 extern int relative_paths;
  54 extern int implied_dirs;
  55 extern int copy_links;
  56 extern int copy_unsafe_links;
  57 extern int protocol_version;
  58 extern int sanitize_paths;
  59 extern int orig_umask;
  60 extern struct stats stats;
  61 extern struct file_list *the_file_list;
  62
  63 extern char curr_dir[MAXPATHLEN];
  64
  65 extern struct chmod_mode_struct *chmod_modes;
  66
  67 extern struct filter_list_struct filter_list;
  68 extern struct filter_list_struct server_filter_list;
  69
  70 int io_error;
  71 int checksum_len;
  72
  73 static char empty_sum[MD4_SUM_LENGTH];
  74 static int flist_count_offset;
  75 static unsigned int file_struct_len;
  76
  77 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  78 static void output_flist(struct file_list *flist);
  79
  80 void init_flist(void)
  81 {
  82         struct file_struct f;
  83
  84         /* Figure out how big the file_struct is without trailing padding */
  85         file_struct_len = offsetof(struct file_struct, flags) + sizeof f.flags;
  86         checksum_len = protocol_version < 21 ? 2 : MD4_SUM_LENGTH;
  87 }
  88
  89 static int show_filelist_p(void)
  90 {
  91         return verbose && xfer_dirs && !am_server;
  92 }
  93
  94 static void start_filelist_progress(char *kind)
  95 {
  96         rprintf(FINFO, "%s ... ", kind);
  97         if (verbose > 1 || do_progress)
  98                 rprintf(FINFO, "\n");
  99         rflush(FINFO);
 100 }
 101
 102 static void emit_filelist_progress(int count)
 103 {
 104         rprintf(FINFO, " %d files...\r", count);
 105 }
 106
 107 static void maybe_emit_filelist_progress(int count)
 108 {
 109         if (do_progress && show_filelist_p() && (count % 100) == 0)
 110                 emit_filelist_progress(count);
 111 }
 112
 113 static void finish_filelist_progress(const struct file_list *flist)
 114 {
 115         if (do_progress) {
 116                 /* This overwrites the progress line */
 117                 rprintf(FINFO, "%d file%sto consider\n",
 118                         flist->count, flist->count == 1 ? " " : "s ");
 119         } else
 120                 rprintf(FINFO, "done\n");
 121 }
 122
 123 void show_flist_stats(void)
 124 {
 125         /* Nothing yet */
 126 }
 127
 128 static void list_file_entry(struct file_struct *f)
 129 {
 130         char perms[11];
 131
 132         if (!f->basename) {
 133                 /* this can happen if duplicate names were removed */
 134                 return;
 135         }
 136
 137         permstring(perms, f->mode);
 138
 139 #ifdef SUPPORT_LINKS
 140         if (preserve_links && S_ISLNK(f->mode)) {
 141                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 142                         perms,
 143                         (double)f->length, timestring(f->modtime),
 144                         f_name(f, NULL), f->u.link);
 145         } else
 146 #endif
 147         {
 148                 rprintf(FINFO, "%s %11.0f %s %s\n",
 149                         perms,
 150                         (double)f->length, timestring(f->modtime),
 151                         f_name(f, NULL));
 152         }
 153 }
 154
 155 /**
 156  * Stat either a symlink or its referent, depending on the settings of
 157  * copy_links, copy_unsafe_links, etc.
 158  *
 159  * @retval -1 on error
 160  *
 161  * @retval 0 for success
 162  *
 163  * @post If @p path is a symlink, then @p linkbuf (of size @c
 164  * MAXPATHLEN) contains the symlink target.
 165  *
 166  * @post @p buffer contains information about the link or the
 167  * referrent as appropriate, if they exist.
 168  **/
 169 static int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 170 {
 171 #ifdef SUPPORT_LINKS
 172         if (copy_links)
 173                 return do_stat(path, buffer);
 174         if (link_stat(path, buffer, 0) < 0)
 175                 return -1;
 176         if (S_ISLNK(buffer->st_mode)) {
 177                 int l = readlink((char *)path, linkbuf, MAXPATHLEN - 1);
 178                 if (l == -1)
 179                         return -1;
 180                 linkbuf[l] = 0;
 181                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 182                         if (verbose > 1) {
 183                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 184                                         path, linkbuf);
 185                         }
 186                         return do_stat(path, buffer);
 187                 }
 188         }
 189         return 0;
 190 #else
 191         return do_stat(path, buffer);
 192 #endif
 193 }
 194
 195 int link_stat(const char *path, STRUCT_STAT *buffer, int follow_dirlinks)
 196 {
 197 #ifdef SUPPORT_LINKS
 198         if (copy_links)
 199                 return do_stat(path, buffer);
 200         if (do_lstat(path, buffer) < 0)
 201                 return -1;
 202         if (follow_dirlinks && S_ISLNK(buffer->st_mode)) {
 203                 STRUCT_STAT st;
 204                 if (do_stat(path, &st) == 0 && S_ISDIR(st.st_mode))
 205                         *buffer = st;
 206         }
 207         return 0;
 208 #else
 209         return do_stat(path, buffer);
 210 #endif
 211 }
 212
 213 /* This function is used to check if a file should be included/excluded
 214  * from the list of files based on its name and type etc.  The value of
 215  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 216 static int is_excluded(char *fname, int is_dir, int filter_level)
 217 {
 218 #if 0 /* This currently never happens, so avoid a useless compare. */
 219         if (filter_level == NO_FILTERS)
 220                 return 0;
 221 #endif
 222         if (fname) {
 223                 /* never exclude '.', even if somebody does --exclude '*' */
 224                 if (fname[0] == '.' && !fname[1])
 225                         return 0;
 226                 /* Handle the -R version of the '.' dir. */
 227                 if (fname[0] == '/') {
 228                         int len = strlen(fname);
 229                         if (fname[len-1] == '.' && fname[len-2] == '/')
 230                                 return 0;
 231                 }
 232         }
 233         if (server_filter_list.head
 234             && check_filter(&server_filter_list, fname, is_dir) < 0)
 235                 return 1;
 236         if (filter_level != ALL_FILTERS)
 237                 return 0;
 238         if (filter_list.head
 239             && check_filter(&filter_list, fname, is_dir) < 0)
 240                 return 1;
 241         return 0;
 242 }
 243
 244 static int to_wire_mode(mode_t mode)
 245 {
 246 #ifdef SUPPORT_LINKS
 247         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 248                 return (mode & ~(_S_IFMT)) | 0120000;
 249 #endif
 250         return (int)mode;
 251 }
 252
 253 static mode_t from_wire_mode(int mode)
 254 {
 255         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 256                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 257         return (mode_t)mode;
 258 }
 259
 260 static void send_directory(int f, struct file_list *flist,
 261                            char *fbuf, int len);
 262
 263 static char *flist_dir;
 264 static int flist_dir_len;
 265
 266
 267 /**
 268  * Make sure @p flist is big enough to hold at least @p flist->count
 269  * entries.
 270  **/
 271 void flist_expand(struct file_list *flist)
 272 {
 273         struct file_struct **new_ptr;
 274
 275         if (flist->count < flist->malloced)
 276                 return;
 277
 278         if (flist->malloced < FLIST_START)
 279                 flist->malloced = FLIST_START;
 280         else if (flist->malloced >= FLIST_LINEAR)
 281                 flist->malloced += FLIST_LINEAR;
 282         else
 283                 flist->malloced *= 2;
 284
 285         /*
 286          * In case count jumped or we are starting the list
 287          * with a known size just set it.
 288          */
 289         if (flist->malloced < flist->count)
 290                 flist->malloced = flist->count;
 291
 292         new_ptr = realloc_array(flist->files, struct file_struct *,
 293                                 flist->malloced);
 294
 295         if (verbose >= 2 && flist->malloced != FLIST_START) {
 296                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 297                     who_am_i(),
 298                     (double)sizeof flist->files[0] * flist->malloced,
 299                     (new_ptr == flist->files) ? " not" : "");
 300         }
 301
 302         flist->files = new_ptr;
 303
 304         if (!flist->files)
 305                 out_of_memory("flist_expand");
 306 }
 307
 308 static void send_file_entry(struct file_struct *file, int f)
 309 {
 310         unsigned short flags;
 311         static time_t modtime;
 312         static mode_t mode;
 313         static int64 dev;
 314         static dev_t rdev;
 315         static uint32 rdev_major;
 316         static uid_t uid;
 317         static gid_t gid;
 318         static char lastname[MAXPATHLEN];
 319         char fname[MAXPATHLEN];
 320         int l1, l2;
 321
 322         if (f < 0)
 323                 return;
 324
 325         if (!file) {
 326                 write_byte(f, 0);
 327                 modtime = 0, mode = 0;
 328                 dev = 0, rdev = makedev(0, 0);
 329                 rdev_major = 0;
 330                 uid = 0, gid = 0;
 331                 *lastname = '\0';
 332                 return;
 333         }
 334
 335         io_write_phase = "send_file_entry";
 336
 337         f_name(file, fname);
 338
 339         flags = file->flags & XMIT_TOP_DIR;
 340
 341         if (file->mode == mode)
 342                 flags |= XMIT_SAME_MODE;
 343         else
 344                 mode = file->mode;
 345         if (preserve_devices) {
 346                 if (protocol_version < 28) {
 347                         if (IS_DEVICE(mode)) {
 348                                 if (file->u.rdev == rdev)
 349                                         flags |= XMIT_SAME_RDEV_pre28;
 350                                 else
 351                                         rdev = file->u.rdev;
 352                         } else
 353                                 rdev = makedev(0, 0);
 354                 } else if (IS_DEVICE(mode)) {
 355                         rdev = file->u.rdev;
 356                         if ((uint32)major(rdev) == rdev_major)
 357                                 flags |= XMIT_SAME_RDEV_MAJOR;
 358                         else
 359                                 rdev_major = major(rdev);
 360                         if ((uint32)minor(rdev) <= 0xFFu)
 361                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
 362                 }
 363         }
 364         if (file->uid == uid)
 365                 flags |= XMIT_SAME_UID;
 366         else
 367                 uid = file->uid;
 368         if (file->gid == gid)
 369                 flags |= XMIT_SAME_GID;
 370         else
 371                 gid = file->gid;
 372         if (file->modtime == modtime)
 373                 flags |= XMIT_SAME_TIME;
 374         else
 375                 modtime = file->modtime;
 376
 377 #ifdef SUPPORT_HARD_LINKS
 378         if (file->link_u.idev) {
 379                 if (file->F_DEV == dev) {
 380                         if (protocol_version >= 28)
 381                                 flags |= XMIT_SAME_DEV;
 382                 } else
 383                         dev = file->F_DEV;
 384                 flags |= XMIT_HAS_IDEV_DATA;
 385         }
 386 #endif
 387
 388         for (l1 = 0;
 389             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 390             l1++) {}
 391         l2 = strlen(fname+l1);
 392
 393         if (l1 > 0)
 394                 flags |= XMIT_SAME_NAME;
 395         if (l2 > 255)
 396                 flags |= XMIT_LONG_NAME;
 397
 398         /* We must make sure we don't send a zero flag byte or the
 399          * other end will terminate the flist transfer.  Note that
 400          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 401          * it's harmless way to add a bit to the first flag byte. */
 402         if (protocol_version >= 28) {
 403                 if (!flags && !S_ISDIR(mode))
 404                         flags |= XMIT_TOP_DIR;
 405                 if ((flags & 0xFF00) || !flags) {
 406                         flags |= XMIT_EXTENDED_FLAGS;
 407                         write_byte(f, flags);
 408                         write_byte(f, flags >> 8);
 409                 } else
 410                         write_byte(f, flags);
 411         } else {
 412                 if (!(flags & 0xFF))
 413                         flags |= S_ISDIR(mode) ? XMIT_LONG_NAME : XMIT_TOP_DIR;
 414                 write_byte(f, flags);
 415         }
 416         if (flags & XMIT_SAME_NAME)
 417                 write_byte(f, l1);
 418         if (flags & XMIT_LONG_NAME)
 419                 write_int(f, l2);
 420         else
 421                 write_byte(f, l2);
 422         write_buf(f, fname + l1, l2);
 423
 424         write_longint(f, file->length);
 425         if (!(flags & XMIT_SAME_TIME))
 426                 write_int(f, modtime);
 427         if (!(flags & XMIT_SAME_MODE))
 428                 write_int(f, to_wire_mode(mode));
 429         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 430                 if (!numeric_ids)
 431                         add_uid(uid);
 432                 write_int(f, uid);
 433         }
 434         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 435                 if (!numeric_ids)
 436                         add_gid(gid);
 437                 write_int(f, gid);
 438         }
 439         if (preserve_devices && IS_DEVICE(mode)) {
 440                 if (protocol_version < 28) {
 441                         if (!(flags & XMIT_SAME_RDEV_pre28))
 442                                 write_int(f, (int)rdev);
 443                 } else {
 444                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 445                                 write_int(f, major(rdev));
 446                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 447                                 write_byte(f, minor(rdev));
 448                         else
 449                                 write_int(f, minor(rdev));
 450                 }
 451         }
 452
 453 #ifdef SUPPORT_LINKS
 454         if (preserve_links && S_ISLNK(mode)) {
 455                 int len = strlen(file->u.link);
 456                 write_int(f, len);
 457                 write_buf(f, file->u.link, len);
 458         }
 459 #endif
 460
 461 #ifdef SUPPORT_HARD_LINKS
 462         if (flags & XMIT_HAS_IDEV_DATA) {
 463                 if (protocol_version < 26) {
 464                         /* 32-bit dev_t and ino_t */
 465                         write_int(f, dev);
 466                         write_int(f, file->F_INODE);
 467                 } else {
 468                         /* 64-bit dev_t and ino_t */
 469                         if (!(flags & XMIT_SAME_DEV))
 470                                 write_longint(f, dev);
 471                         write_longint(f, file->F_INODE);
 472                 }
 473         }
 474 #endif
 475
 476         if (always_checksum && (S_ISREG(mode) || protocol_version < 28)) {
 477                 char *sum;
 478                 if (S_ISREG(mode))
 479                         sum = file->u.sum;
 480                 else {
 481                         /* Prior to 28, we sent a useless set of nulls. */
 482                         sum = empty_sum;
 483                 }
 484                 write_buf(f, sum, checksum_len);
 485         }
 486
 487         strlcpy(lastname, fname, MAXPATHLEN);
 488
 489         io_write_phase = "unknown";
 490 }
 491
 492 static struct file_struct *receive_file_entry(struct file_list *flist,
 493                                               unsigned short flags, int f)
 494 {
 495         static time_t modtime;
 496         static mode_t mode;
 497         static int64 dev;
 498         static dev_t rdev;
 499         static uint32 rdev_major;
 500         static uid_t uid;
 501         static gid_t gid;
 502         static char lastname[MAXPATHLEN], *lastdir;
 503         static int lastdir_depth, lastdir_len = -1;
 504         static unsigned int del_hier_name_len = 0;
 505         static int in_del_hier = 0;
 506         char thisname[MAXPATHLEN];
 507         unsigned int l1 = 0, l2 = 0;
 508         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 509         OFF_T file_length;
 510         char *basename, *dirname, *bp;
 511         struct file_struct *file;
 512
 513         if (!flist) {
 514                 modtime = 0, mode = 0;
 515                 dev = 0, rdev = makedev(0, 0);
 516                 rdev_major = 0;
 517                 uid = 0, gid = 0;
 518                 *lastname = '\0';
 519                 lastdir_len = -1;
 520                 in_del_hier = 0;
 521                 return NULL;
 522         }
 523
 524         if (flags & XMIT_SAME_NAME)
 525                 l1 = read_byte(f);
 526
 527         if (flags & XMIT_LONG_NAME)
 528                 l2 = read_int(f);
 529         else
 530                 l2 = read_byte(f);
 531
 532         if (l2 >= MAXPATHLEN - l1) {
 533                 rprintf(FERROR,
 534                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 535                         flags, l1, l2, lastname);
 536                 overflow_exit("receive_file_entry");
 537         }
 538
 539         strlcpy(thisname, lastname, l1 + 1);
 540         read_sbuf(f, &thisname[l1], l2);
 541         thisname[l1 + l2] = 0;
 542
 543         strlcpy(lastname, thisname, MAXPATHLEN);
 544
 545         clean_fname(thisname, 0);
 546
 547         if (sanitize_paths)
 548                 sanitize_path(thisname, thisname, "", 0);
 549
 550         if ((basename = strrchr(thisname, '/')) != NULL) {
 551                 dirname_len = ++basename - thisname; /* counts future '\0' */
 552                 if (lastdir_len == dirname_len - 1
 553                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 554                         dirname = lastdir;
 555                         dirname_len = 0; /* indicates no copy is needed */
 556                 } else
 557                         dirname = thisname;
 558         } else {
 559                 basename = thisname;
 560                 dirname = NULL;
 561                 dirname_len = 0;
 562         }
 563         basename_len = strlen(basename) + 1; /* count the '\0' */
 564
 565         file_length = read_longint(f);
 566         if (!(flags & XMIT_SAME_TIME))
 567                 modtime = (time_t)read_int(f);
 568         if (!(flags & XMIT_SAME_MODE))
 569                 mode = from_wire_mode(read_int(f));
 570
 571         if (chmod_modes && !S_ISLNK(mode))
 572                 mode = tweak_mode(mode, chmod_modes);
 573
 574         if (preserve_uid && !(flags & XMIT_SAME_UID))
 575                 uid = (uid_t)read_int(f);
 576         if (preserve_gid && !(flags & XMIT_SAME_GID))
 577                 gid = (gid_t)read_int(f);
 578
 579         if (preserve_devices) {
 580                 if (protocol_version < 28) {
 581                         if (IS_DEVICE(mode)) {
 582                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 583                                         rdev = (dev_t)read_int(f);
 584                         } else
 585                                 rdev = makedev(0, 0);
 586                 } else if (IS_DEVICE(mode)) {
 587                         uint32 rdev_minor;
 588                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 589                                 rdev_major = read_int(f);
 590                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 591                                 rdev_minor = read_byte(f);
 592                         else
 593                                 rdev_minor = read_int(f);
 594                         rdev = makedev(rdev_major, rdev_minor);
 595                 }
 596         }
 597
 598 #ifdef SUPPORT_LINKS
 599         if (preserve_links && S_ISLNK(mode)) {
 600                 linkname_len = read_int(f) + 1; /* count the '\0' */
 601                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 602                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 603                                 linkname_len - 1);
 604                         overflow_exit("receive_file_entry");
 605                 }
 606         }
 607         else
 608 #endif
 609                 linkname_len = 0;
 610
 611         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 612
 613         alloc_len = file_struct_len + dirname_len + basename_len
 614                   + linkname_len + sum_len;
 615         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 616
 617         file = (struct file_struct *)bp;
 618         memset(bp, 0, file_struct_len);
 619         bp += file_struct_len;
 620
 621         file->flags = 0;
 622         file->modtime = modtime;
 623         file->length = file_length;
 624         file->mode = mode;
 625         file->uid = uid;
 626         file->gid = gid;
 627
 628         if (dirname_len) {
 629                 file->dirname = lastdir = bp;
 630                 lastdir_len = dirname_len - 1;
 631                 memcpy(bp, dirname, dirname_len - 1);
 632                 bp += dirname_len;
 633                 bp[-1] = '\0';
 634                 lastdir_depth = count_dir_elements(lastdir);
 635                 file->dir.depth = lastdir_depth + 1;
 636         } else if (dirname) {
 637                 file->dirname = dirname; /* we're reusing lastname */
 638                 file->dir.depth = lastdir_depth + 1;
 639         } else
 640                 file->dir.depth = 1;
 641
 642         if (S_ISDIR(mode)) {
 643                 if (basename_len == 1+1 && *basename == '.') /* +1 for '\0' */
 644                         file->dir.depth--;
 645                 if (flags & XMIT_TOP_DIR) {
 646                         in_del_hier = recurse;
 647                         del_hier_name_len = file->dir.depth == 0 ? 0 : l1 + l2;
 648                         if (relative_paths && del_hier_name_len > 2
 649                             && basename_len == 1+1 && *basename == '.')
 650                                 del_hier_name_len -= 2;
 651                         file->flags |= FLAG_TOP_DIR | FLAG_DEL_HERE;
 652                 } else if (in_del_hier) {
 653                         if (!relative_paths || !del_hier_name_len
 654                          || (l1 >= del_hier_name_len
 655                           && thisname[del_hier_name_len] == '/'))
 656                                 file->flags |= FLAG_DEL_HERE;
 657                         else
 658                                 in_del_hier = 0;
 659                 }
 660         }
 661
 662         file->basename = bp;
 663         memcpy(bp, basename, basename_len);
 664         bp += basename_len;
 665
 666         if (preserve_devices && IS_DEVICE(mode))
 667                 file->u.rdev = rdev;
 668
 669 #ifdef SUPPORT_LINKS
 670         if (linkname_len) {
 671                 file->u.link = bp;
 672                 read_sbuf(f, bp, linkname_len - 1);
 673                 if (sanitize_paths)
 674                         sanitize_path(bp, bp, "", lastdir_depth);
 675                 bp += linkname_len;
 676         }
 677 #endif
 678
 679 #ifdef SUPPORT_HARD_LINKS
 680         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 681                 flags |= XMIT_HAS_IDEV_DATA;
 682         if (flags & XMIT_HAS_IDEV_DATA) {
 683                 int64 inode;
 684                 if (protocol_version < 26) {
 685                         dev = read_int(f);
 686                         inode = read_int(f);
 687                 } else {
 688                         if (!(flags & XMIT_SAME_DEV))
 689                                 dev = read_longint(f);
 690                         inode = read_longint(f);
 691                 }
 692                 if (flist->hlink_pool) {
 693                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 694                             struct idev, 1, "inode_table");
 695                         file->F_INODE = inode;
 696                         file->F_DEV = dev;
 697                 }
 698         }
 699 #endif
 700
 701         if (always_checksum && (sum_len || protocol_version < 28)) {
 702                 char *sum;
 703                 if (sum_len) {
 704                         file->u.sum = sum = bp;
 705                         /*bp += sum_len;*/
 706                 } else {
 707                         /* Prior to 28, we get a useless set of nulls. */
 708                         sum = empty_sum;
 709                 }
 710                 read_buf(f, sum, checksum_len);
 711         }
 712
 713         if (!preserve_perms) {
 714                 /* set an appropriate set of permissions based on original
 715                  * permissions and umask. This emulates what GNU cp does */
 716                 file->mode &= ~orig_umask;
 717         }
 718
 719         return file;
 720 }
 721
 722 /**
 723  * Create a file_struct for a named file by reading its stat()
 724  * information and performing extensive checks against global
 725  * options.
 726  *
 727  * @return the new file, or NULL if there was an error or this file
 728  * should be excluded.
 729  *
 730  * @todo There is a small optimization opportunity here to avoid
 731  * stat()ing the file in some circumstances, which has a certain cost.
 732  * We are called immediately after doing readdir(), and so we may
 733  * already know the d_type of the file.  We could for example avoid
 734  * statting directories if we're not recursing, but this is not a very
 735  * important case.  Some systems may not have d_type.
 736  **/
 737 struct file_struct *make_file(char *fname, struct file_list *flist,
 738                               STRUCT_STAT *stp, unsigned short flags,
 739                               int filter_level)
 740 {
 741         static char *lastdir;
 742         static int lastdir_len = -1;
 743         struct file_struct *file;
 744         STRUCT_STAT st;
 745         char sum[SUM_LENGTH];
 746         char thisname[MAXPATHLEN];
 747         char linkname[MAXPATHLEN];
 748         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 749         char *basename, *dirname, *bp;
 750
 751         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
 752                 lastdir_len = -1;
 753
 754         if (strlcpy(thisname, fname, sizeof thisname)
 755             >= sizeof thisname - flist_dir_len) {
 756                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 757                 return NULL;
 758         }
 759         clean_fname(thisname, 0);
 760         if (sanitize_paths)
 761                 sanitize_path(thisname, thisname, "", 0);
 762
 763         memset(sum, 0, SUM_LENGTH);
 764
 765         if (stp && S_ISDIR(stp->st_mode))
 766                 st = *stp; /* Needed for "symlink/." with --relative. */
 767         else if (readlink_stat(thisname, &st, linkname) != 0) {
 768                 int save_errno = errno;
 769                 /* See if file is excluded before reporting an error. */
 770                 if (filter_level != NO_FILTERS
 771                     && is_excluded(thisname, 0, filter_level))
 772                         return NULL;
 773                 if (save_errno == ENOENT) {
 774 #ifdef SUPPORT_LINKS
 775                         /* Avoid "vanished" error if symlink points nowhere. */
 776                         if (copy_links && do_lstat(thisname, &st) == 0
 777                             && S_ISLNK(st.st_mode)) {
 778                                 io_error |= IOERR_GENERAL;
 779                                 rprintf(FERROR, "symlink has no referent: %s\n",
 780                                         full_fname(thisname));
 781                         } else
 782 #endif
 783                         {
 784                                 enum logcode c = am_daemon && protocol_version < 28
 785                                     ? FERROR : FINFO;
 786                                 io_error |= IOERR_VANISHED;
 787                                 rprintf(c, "file has vanished: %s\n",
 788                                         full_fname(thisname));
 789                         }
 790                 } else {
 791                         io_error |= IOERR_GENERAL;
 792                         rsyserr(FERROR, save_errno, "readlink %s failed",
 793                                 full_fname(thisname));
 794                 }
 795                 return NULL;
 796         }
 797
 798         /* backup.c calls us with filter_level set to NO_FILTERS. */
 799         if (filter_level == NO_FILTERS)
 800                 goto skip_filters;
 801
 802         if (S_ISDIR(st.st_mode) && !xfer_dirs) {
 803                 rprintf(FINFO, "skipping directory %s\n", thisname);
 804                 return NULL;
 805         }
 806
 807         /* We only care about directories because we need to avoid recursing
 808          * into a mount-point directory, not to avoid copying a symlinked
 809          * file if -L (or similar) was specified. */
 810         if (one_file_system && S_ISDIR(st.st_mode) && !(flags & FLAG_TOP_DIR)) {
 811                 STRUCT_STAT st2;
 812                 unsigned int len = strlcat(thisname, "/..", sizeof thisname);
 813                 /* If the directory's .. dir is on a different filesystem,
 814                  * either mark this dir as a mount-point or skip it. */
 815                 if (len < sizeof thisname && do_stat(thisname, &st2) == 0
 816                  && (st.st_dev != st2.st_dev || st.st_ino != st2.st_ino)) {
 817                         if (one_file_system > 1) {
 818                                 if (verbose > 2) {
 819                                         rprintf(FINFO,
 820                                             "skipping mount-point dir %s\n",
 821                                             thisname);
 822                                 }
 823                                 return NULL;
 824                         }
 825                         flags |= FLAG_MOUNT_POINT;
 826                 }
 827                 thisname[len-3] = '\0';
 828         }
 829
 830         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level))
 831                 return NULL;
 832
 833         if (lp_ignore_nonreadable(module_id)) {
 834 #ifdef SUPPORT_LINKS
 835                 if (!S_ISLNK(st.st_mode))
 836 #endif
 837                         if (access(thisname, R_OK) != 0)
 838                                 return NULL;
 839         }
 840
 841   skip_filters:
 842
 843         if (verbose > 2) {
 844                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 845                         who_am_i(), thisname, filter_level);
 846         }
 847
 848         if ((basename = strrchr(thisname, '/')) != NULL) {
 849                 dirname_len = ++basename - thisname; /* counts future '\0' */
 850                 if (lastdir_len == dirname_len - 1
 851                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 852                         dirname = lastdir;
 853                         dirname_len = 0; /* indicates no copy is needed */
 854                 } else
 855                         dirname = thisname;
 856         } else {
 857                 basename = thisname;
 858                 dirname = NULL;
 859                 dirname_len = 0;
 860         }
 861         basename_len = strlen(basename) + 1; /* count the '\0' */
 862
 863 #ifdef SUPPORT_LINKS
 864         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 865 #else
 866         linkname_len = 0;
 867 #endif
 868
 869         sum_len = always_checksum && am_sender && S_ISREG(st.st_mode)
 870                 ? MD4_SUM_LENGTH : 0;
 871
 872         alloc_len = file_struct_len + dirname_len + basename_len
 873             + linkname_len + sum_len;
 874         if (flist)
 875                 bp = pool_alloc(flist->file_pool, alloc_len, "make_file");
 876         else {
 877                 if (!(bp = new_array(char, alloc_len)))
 878                         out_of_memory("make_file");
 879         }
 880
 881         file = (struct file_struct *)bp;
 882         memset(bp, 0, file_struct_len);
 883         bp += file_struct_len;
 884
 885         file->flags = flags;
 886         file->modtime = st.st_mtime;
 887         file->length = st.st_size;
 888         file->mode = st.st_mode;
 889         file->uid = st.st_uid;
 890         file->gid = st.st_gid;
 891
 892 #ifdef SUPPORT_HARD_LINKS
 893         if (flist && flist->hlink_pool) {
 894                 if (protocol_version < 28) {
 895                         if (S_ISREG(st.st_mode))
 896                                 file->link_u.idev = pool_talloc(
 897                                     flist->hlink_pool, struct idev, 1,
 898                                     "inode_table");
 899                 } else {
 900                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 901                                 file->link_u.idev = pool_talloc(
 902                                     flist->hlink_pool, struct idev, 1,
 903                                     "inode_table");
 904                 }
 905         }
 906         if (file->link_u.idev) {
 907                 file->F_DEV = st.st_dev;
 908                 file->F_INODE = st.st_ino;
 909         }
 910 #endif
 911
 912         if (dirname_len) {
 913                 file->dirname = lastdir = bp;
 914                 lastdir_len = dirname_len - 1;
 915                 memcpy(bp, dirname, dirname_len - 1);
 916                 bp += dirname_len;
 917                 bp[-1] = '\0';
 918         } else if (dirname)
 919                 file->dirname = dirname;
 920
 921         file->basename = bp;
 922         memcpy(bp, basename, basename_len);
 923         bp += basename_len;
 924
 925 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 926         if (preserve_devices && IS_DEVICE(st.st_mode))
 927                 file->u.rdev = st.st_rdev;
 928 #endif
 929
 930 #ifdef SUPPORT_LINKS
 931         if (linkname_len) {
 932                 file->u.link = bp;
 933                 memcpy(bp, linkname, linkname_len);
 934                 bp += linkname_len;
 935         }
 936 #endif
 937
 938         if (sum_len) {
 939                 file->u.sum = bp;
 940                 file_checksum(thisname, bp, st.st_size);
 941                 /*bp += sum_len;*/
 942         }
 943
 944         file->dir.root = flist_dir;
 945
 946         /* This code is only used by the receiver when it is building
 947          * a list of files for a delete pass. */
 948         if (keep_dirlinks && linkname_len && flist) {
 949                 STRUCT_STAT st2;
 950                 int save_mode = file->mode;
 951                 file->mode = S_IFDIR; /* Find a directory with our name. */
 952                 if (flist_find(the_file_list, file) >= 0
 953                     && do_stat(thisname, &st2) == 0 && S_ISDIR(st2.st_mode)) {
 954                         file->modtime = st2.st_mtime;
 955                         file->length = st2.st_size;
 956                         file->mode = st2.st_mode;
 957                         file->uid = st2.st_uid;
 958                         file->gid = st2.st_gid;
 959                         file->u.link = NULL;
 960                 } else
 961                         file->mode = save_mode;
 962         }
 963
 964         if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
 965                 stats.total_size += st.st_size;
 966
 967         return file;
 968 }
 969
 970 static struct file_struct *send_file_name(int f, struct file_list *flist,
 971                                           char *fname, STRUCT_STAT *stp,
 972                                           unsigned short flags)
 973 {
 974         struct file_struct *file;
 975
 976         file = make_file(fname, flist, stp, flags,
 977                          f == -2 ? SERVER_FILTERS : ALL_FILTERS);
 978         if (!file)
 979                 return NULL;
 980
 981         if (chmod_modes && !S_ISLNK(file->mode))
 982                 file->mode = tweak_mode(file->mode, chmod_modes);
 983
 984         maybe_emit_filelist_progress(flist->count + flist_count_offset);
 985
 986         flist_expand(flist);
 987
 988         if (file->basename[0]) {
 989                 flist->files[flist->count++] = file;
 990                 send_file_entry(file, f);
 991         }
 992         return file;
 993 }
 994
 995 static void send_if_directory(int f, struct file_list *flist,
 996                               struct file_struct *file,
 997                               char *fbuf, unsigned int ol)
 998 {
 999         char is_dot_dir = fbuf[ol-1] == '.' && (ol == 1 || fbuf[ol-2] == '/');
1000
1001         if (S_ISDIR(file->mode)
1002             && !(file->flags & FLAG_MOUNT_POINT) && f_name(file, fbuf)) {
1003                 void *save_filters;
1004                 unsigned int len = strlen(fbuf);
1005                 if (len > 1 && fbuf[len-1] == '/')
1006                         fbuf[--len] = '\0';
1007                 if (len >= MAXPATHLEN - 1) {
1008                         io_error |= IOERR_GENERAL;
1009                         rprintf(FERROR, "skipping long-named directory: %s\n",
1010                                 full_fname(fbuf));
1011                         return;
1012                 }
1013                 save_filters = push_local_filters(fbuf, len);
1014                 send_directory(f, flist, fbuf, len);
1015                 pop_local_filters(save_filters);
1016                 fbuf[ol] = '\0';
1017                 if (is_dot_dir)
1018                         fbuf[ol-1] = '.';
1019         }
1020 }
1021
1022 /* This function is normally called by the sender, but the receiving side also
1023  * calls it from get_dirlist() with f set to -1 so that we just construct the
1024  * file list in memory without sending it over the wire.  Also, get_dirlist()
1025  * might call this with f set to -2, which also indicates that local filter
1026  * rules should be ignored. */
1027 static void send_directory(int f, struct file_list *flist,
1028                            char *fbuf, int len)
1029 {
1030         struct dirent *di;
1031         unsigned remainder;
1032         char *p;
1033         DIR *d;
1034         int start = flist->count;
1035
1036         if (!(d = opendir(fbuf))) {
1037                 io_error |= IOERR_GENERAL;
1038                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(fbuf));
1039                 return;
1040         }
1041
1042         p = fbuf + len;
1043         if (len != 1 || *fbuf != '/')
1044                 *p++ = '/';
1045         *p = '\0';
1046         remainder = MAXPATHLEN - (p - fbuf);
1047
1048         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1049                 char *dname = d_name(di);
1050                 if (dname[0] == '.' && (dname[1] == '\0'
1051                     || (dname[1] == '.' && dname[2] == '\0')))
1052                         continue;
1053                 if (strlcpy(p, dname, remainder) >= remainder) {
1054                         io_error |= IOERR_GENERAL;
1055                         rprintf(FINFO,
1056                                 "cannot send long-named file %s\n",
1057                                 full_fname(fbuf));
1058                         continue;
1059                 }
1060
1061                 send_file_name(f, flist, fbuf, NULL, 0);
1062         }
1063
1064         fbuf[len] = '\0';
1065
1066         if (errno) {
1067                 io_error |= IOERR_GENERAL;
1068                 rsyserr(FERROR, errno, "readdir(%s)", full_fname(fbuf));
1069         }
1070
1071         closedir(d);
1072
1073         if (recurse) {
1074                 int i, end = flist->count - 1;
1075                 for (i = start; i <= end; i++)
1076                         send_if_directory(f, flist, flist->files[i], fbuf, len);
1077         }
1078 }
1079
1080 struct file_list *send_file_list(int f, int argc, char *argv[])
1081 {
1082         int len;
1083         STRUCT_STAT st;
1084         char *p, *dir, olddir[sizeof curr_dir];
1085         char lastpath[MAXPATHLEN] = "";
1086         struct file_list *flist;
1087         struct timeval start_tv, end_tv;
1088         int64 start_write;
1089         int use_ff_fd = 0;
1090
1091         if (show_filelist_p())
1092                 start_filelist_progress("building file list");
1093
1094         start_write = stats.total_written;
1095         gettimeofday(&start_tv, NULL);
1096
1097         flist = flist_new(WITH_HLINK, "send_file_list");
1098
1099         io_start_buffering_out();
1100         if (filesfrom_fd >= 0) {
1101                 if (argv[0] && !push_dir(argv[0])) {
1102                         rsyserr(FERROR, errno, "push_dir %s failed",
1103                                 full_fname(argv[0]));
1104                         exit_cleanup(RERR_FILESELECT);
1105                 }
1106                 use_ff_fd = 1;
1107         }
1108
1109         while (1) {
1110                 char fbuf[MAXPATHLEN];
1111                 char *fn;
1112                 int is_dot_dir;
1113
1114                 if (use_ff_fd) {
1115                         if (read_filesfrom_line(filesfrom_fd, fbuf) == 0)
1116                                 break;
1117                         sanitize_path(fbuf, fbuf, "", 0);
1118                 } else {
1119                         if (argc-- == 0)
1120                                 break;
1121                         strlcpy(fbuf, *argv++, MAXPATHLEN);
1122                         if (sanitize_paths)
1123                                 sanitize_path(fbuf, fbuf, "", 0);
1124                 }
1125
1126                 len = strlen(fbuf);
1127                 if (relative_paths) {
1128                         /* We clean up fbuf below. */
1129                         is_dot_dir = 0;
1130                 } else if (!len || fbuf[len - 1] == '/') {
1131                         if (len == 2 && fbuf[0] == '.') {
1132                                 /* Turn "./" into just "." rather than "./." */
1133                                 fbuf[1] = '\0';
1134                         } else {
1135                                 if (len + 1 >= MAXPATHLEN)
1136                                         overflow_exit("send_file_list");
1137                                 fbuf[len++] = '.';
1138                                 fbuf[len] = '\0';
1139                         }
1140                         is_dot_dir = 1;
1141                 } else if (len > 1 && fbuf[len-1] == '.' && fbuf[len-2] == '.'
1142                     && (len == 2 || fbuf[len-3] == '/')) {
1143                         if (len + 2 >= MAXPATHLEN)
1144                                 overflow_exit("send_file_list");
1145                         fbuf[len++] = '/';
1146                         fbuf[len++] = '.';
1147                         fbuf[len] = '\0';
1148                         is_dot_dir = 1;
1149                 } else {
1150                         is_dot_dir = fbuf[len-1] == '.'
1151                                    && (len == 1 || fbuf[len-2] == '/');
1152                 }
1153
1154                 if (link_stat(fbuf, &st, keep_dirlinks) != 0) {
1155                         io_error |= IOERR_GENERAL;
1156                         rsyserr(FERROR, errno, "link_stat %s failed",
1157                                 full_fname(fbuf));
1158                         continue;
1159                 }
1160
1161                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1162                         rprintf(FINFO, "skipping directory %s\n", fbuf);
1163                         continue;
1164                 }
1165
1166                 dir = NULL;
1167                 olddir[0] = '\0';
1168
1169                 if (!relative_paths) {
1170                         p = strrchr(fbuf, '/');
1171                         if (p) {
1172                                 *p = '\0';
1173                                 if (p == fbuf)
1174                                         dir = "/";
1175                                 else
1176                                         dir = fbuf;
1177                                 len -= p - fbuf + 1;
1178                                 fn = p + 1;
1179                         } else
1180                                 fn = fbuf;
1181                 } else {
1182                         if ((p = strstr(fbuf, "/./")) != NULL) {
1183                                 *p = '\0';
1184                                 if (p == fbuf)
1185                                         dir = "/";
1186                                 else
1187                                         dir = fbuf;
1188                                 len -= p - fbuf + 3;
1189                                 fn = p + 3;
1190                         } else
1191                                 fn = fbuf;
1192                         /* Get rid of trailing "/" and "/.". */
1193                         while (len) {
1194                                 if (fn[len - 1] == '/') {
1195                                         is_dot_dir = 1;
1196                                         if (!--len && !dir) {
1197                                                 len++;
1198                                                 break;
1199                                         }
1200                                 }
1201                                 else if (len >= 2 && fn[len - 1] == '.'
1202                                                   && fn[len - 2] == '/') {
1203                                         is_dot_dir = 1;
1204                                         if (!(len -= 2) && !dir) {
1205                                                 len++;
1206                                                 break;
1207                                         }
1208                                 } else
1209                                         break;
1210                         }
1211                         fn[len] = '\0';
1212                         /* Reject a ".." dir in the active part of the path. */
1213                         for (p = fn; (p = strstr(p, "..")) != NULL; p += 2) {
1214                                 if ((p[2] == '/' || p[2] == '\0')
1215                                  && (p == fn || p[-1] == '/')) {
1216                                         rprintf(FERROR,
1217                                             "found \"..\" dir in relative path: %s\n",
1218                                             fbuf);
1219                                         exit_cleanup(RERR_SYNTAX);
1220                                 }
1221                         }
1222                 }
1223
1224                 if (!*fn) {
1225                         len = 1;
1226                         fn = ".";
1227                 }
1228
1229                 if (dir && *dir) {
1230                         static char *lastdir;
1231                         static int lastdir_len;
1232
1233                         strlcpy(olddir, curr_dir, sizeof olddir);
1234
1235                         if (!push_dir(dir)) {
1236                                 io_error |= IOERR_GENERAL;
1237                                 rsyserr(FERROR, errno, "push_dir %s failed",
1238                                         full_fname(dir));
1239                                 continue;
1240                         }
1241
1242                         if (lastdir && strcmp(lastdir, dir) == 0) {
1243                                 flist_dir = lastdir;
1244                                 flist_dir_len = lastdir_len;
1245                         } else {
1246                                 flist_dir = lastdir = strdup(dir);
1247                                 flist_dir_len = lastdir_len = strlen(dir);
1248                         }
1249                 }
1250
1251                 if (fn != fbuf)
1252                         memmove(fbuf, fn, len + 1);
1253
1254                 if (implied_dirs && (p=strrchr(fbuf,'/')) && p != fbuf) {
1255                         /* Send the implied directories at the start of the
1256                          * source spec, so we get their permissions right. */
1257                         char *lp = lastpath, *slash = fbuf;
1258                         *p = '\0';
1259                         /* Skip any initial directories in our path that we
1260                          * have in common with lastpath. */
1261                         for (fn = fbuf; *fn && *lp == *fn; lp++, fn++) {
1262                                 if (*fn == '/')
1263                                         slash = fn;
1264                         }
1265                         *p = '/';
1266                         if (fn != p || (*lp && *lp != '/')) {
1267                                 int save_copy_links = copy_links;
1268                                 int save_xfer_dirs = xfer_dirs;
1269                                 copy_links = copy_unsafe_links;
1270                                 xfer_dirs = 1;
1271                                 while ((slash = strchr(slash+1, '/')) != 0) {
1272                                         *slash = '\0';
1273                                         send_file_name(f, flist, fbuf, NULL, 0);
1274                                         *slash = '/';
1275                                 }
1276                                 copy_links = save_copy_links;
1277                                 xfer_dirs = save_xfer_dirs;
1278                                 *p = '\0';
1279                                 strlcpy(lastpath, fbuf, sizeof lastpath);
1280                                 *p = '/';
1281                         }
1282                 }
1283
1284                 if (recurse || (xfer_dirs && is_dot_dir)) {
1285                         struct file_struct *file;
1286                         file = send_file_name(f, flist, fbuf, &st, FLAG_TOP_DIR);
1287                         if (file)
1288                                 send_if_directory(f, flist, file, fbuf, len);
1289                 } else
1290                         send_file_name(f, flist, fbuf, &st, 0);
1291
1292                 if (olddir[0]) {
1293                         flist_dir = NULL;
1294                         flist_dir_len = 0;
1295                         if (!pop_dir(olddir)) {
1296                                 rsyserr(FERROR, errno, "pop_dir %s failed",
1297                                         full_fname(olddir));
1298                                 exit_cleanup(RERR_FILESELECT);
1299                         }
1300                 }
1301         }
1302
1303         gettimeofday(&end_tv, NULL);
1304         stats.flist_buildtime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1305                               + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1306         if (stats.flist_buildtime == 0)
1307                 stats.flist_buildtime = 1;
1308         start_tv = end_tv;
1309
1310         send_file_entry(NULL, f);
1311
1312         if (show_filelist_p())
1313                 finish_filelist_progress(flist);
1314
1315         gettimeofday(&end_tv, NULL);
1316         stats.flist_xfertime = (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1317                              + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1318
1319         if (flist->hlink_pool) {
1320                 pool_destroy(flist->hlink_pool);
1321                 flist->hlink_pool = NULL;
1322         }
1323
1324         /* Sort the list without removing any duplicates.  This allows the
1325          * receiving side to ask for any name they like, which gives us the
1326          * flexibility to change the way we unduplicate names in the future
1327          * without causing a compatibility problem with older versions. */
1328         clean_flist(flist, 0, 0);
1329
1330         /* Now send the uid/gid list. This was introduced in
1331          * protocol version 15 */
1332         send_uid_list(f);
1333
1334         /* send the io_error flag */
1335         write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1336
1337         io_end_buffering();
1338         stats.flist_size = stats.total_written - start_write;
1339         stats.num_files = flist->count;
1340
1341         if (verbose > 3)
1342                 output_flist(flist);
1343
1344         if (verbose > 2)
1345                 rprintf(FINFO, "send_file_list done\n");
1346
1347         return flist;
1348 }
1349
1350 struct file_list *recv_file_list(int f)
1351 {
1352         struct file_list *flist;
1353         unsigned short flags;
1354         int64 start_read;
1355
1356         if (show_filelist_p())
1357                 start_filelist_progress("receiving file list");
1358
1359         start_read = stats.total_read;
1360
1361         flist = flist_new(WITH_HLINK, "recv_file_list");
1362
1363         flist->count = 0;
1364         flist->malloced = 1000;
1365         flist->files = new_array(struct file_struct *, flist->malloced);
1366         if (!flist->files)
1367                 goto oom;
1368
1369         while ((flags = read_byte(f)) != 0) {
1370                 struct file_struct *file;
1371
1372                 flist_expand(flist);
1373
1374                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1375                         flags |= read_byte(f) << 8;
1376                 file = receive_file_entry(flist, flags, f);
1377
1378                 if (S_ISREG(file->mode))
1379                         stats.total_size += file->length;
1380
1381                 flist->files[flist->count++] = file;
1382
1383                 maybe_emit_filelist_progress(flist->count);
1384
1385                 if (verbose > 2) {
1386                         rprintf(FINFO, "recv_file_name(%s)\n",
1387                                 f_name(file, NULL));
1388                 }
1389         }
1390         receive_file_entry(NULL, 0, 0); /* Signal that we're done. */
1391
1392         if (verbose > 2)
1393                 rprintf(FINFO, "received %d names\n", flist->count);
1394
1395         if (show_filelist_p())
1396                 finish_filelist_progress(flist);
1397
1398         clean_flist(flist, relative_paths, 1);
1399
1400         if (f >= 0) {
1401                 /* Now send the uid/gid list. This was introduced in
1402                  * protocol version 15 */
1403                 recv_uid_list(f, flist);
1404
1405                 /* Recv the io_error flag */
1406                 if (lp_ignore_errors(module_id) || ignore_errors)
1407                         read_int(f);
1408                 else
1409                         io_error |= read_int(f);
1410         }
1411
1412         if (verbose > 3)
1413                 output_flist(flist);
1414
1415         if (list_only) {
1416                 int i;
1417                 for (i = 0; i < flist->count; i++)
1418                         list_file_entry(flist->files[i]);
1419         }
1420
1421         if (verbose > 2)
1422                 rprintf(FINFO, "recv_file_list done\n");
1423
1424         stats.flist_size = stats.total_read - start_read;
1425         stats.num_files = flist->count;
1426
1427         return flist;
1428
1429   oom:
1430         out_of_memory("recv_file_list");
1431         return NULL;            /* not reached */
1432 }
1433
1434 static int file_compare(struct file_struct **file1, struct file_struct **file2)
1435 {
1436         return f_name_cmp(*file1, *file2);
1437 }
1438
1439 /* Search for an identically-named item in the file list.  Note that the
1440  * items must agree in their directory-ness, or no match is returned. */
1441 int flist_find(struct file_list *flist, struct file_struct *f)
1442 {
1443         int low = flist->low, high = flist->high;
1444         int ret, mid, mid_up;
1445
1446         while (low <= high) {
1447                 mid = (low + high) / 2;
1448                 for (mid_up = mid; !flist->files[mid_up]->basename; mid_up++) {}
1449                 if (mid_up <= high)
1450                         ret = f_name_cmp(flist->files[mid_up], f);
1451                 else
1452                         ret = 1;
1453                 if (ret == 0) {
1454                         if (protocol_version < 29
1455                             && S_ISDIR(flist->files[mid_up]->mode)
1456                             != S_ISDIR(f->mode))
1457                                 return -1;
1458                         return mid_up;
1459                 }
1460                 if (ret > 0)
1461                         high = mid - 1;
1462                 else
1463                         low = mid_up + 1;
1464         }
1465         return -1;
1466 }
1467
1468 /*
1469  * Free up any resources a file_struct has allocated
1470  * and clear the file.
1471  */
1472 void clear_file(int i, struct file_list *flist)
1473 {
1474         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1475                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1476         memset(flist->files[i], 0, file_struct_len);
1477 }
1478
1479 /*
1480  * allocate a new file list
1481  */
1482 struct file_list *flist_new(int with_hlink, char *msg)
1483 {
1484         struct file_list *flist;
1485
1486         flist = new(struct file_list);
1487         if (!flist)
1488                 out_of_memory(msg);
1489
1490         memset(flist, 0, sizeof (struct file_list));
1491
1492         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1493             out_of_memory, POOL_INTERN)))
1494                 out_of_memory(msg);
1495
1496 #ifdef SUPPORT_HARD_LINKS
1497         if (with_hlink && preserve_hard_links) {
1498                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1499                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1500                         out_of_memory(msg);
1501         }
1502 #endif
1503
1504         return flist;
1505 }
1506
1507 /*
1508  * free up all elements in a flist
1509  */
1510 void flist_free(struct file_list *flist)
1511 {
1512         pool_destroy(flist->file_pool);
1513         pool_destroy(flist->hlink_pool);
1514         free(flist->files);
1515         free(flist);
1516 }
1517
1518 /*
1519  * This routine ensures we don't have any duplicate names in our file list.
1520  * duplicate names can cause corruption because of the pipelining
1521  */
1522 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1523 {
1524         int i, prev_i = 0;
1525
1526         if (!flist)
1527                 return;
1528         if (flist->count == 0) {
1529                 flist->high = -1;
1530                 return;
1531         }
1532
1533         qsort(flist->files, flist->count,
1534             sizeof flist->files[0], (int (*)())file_compare);
1535
1536         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1537                 if (flist->files[i]->basename) {
1538                         prev_i = i;
1539                         break;
1540                 }
1541         }
1542         flist->low = prev_i;
1543         while (++i < flist->count) {
1544                 int j;
1545                 struct file_struct *file = flist->files[i];
1546
1547                 if (!file->basename)
1548                         continue;
1549                 if (f_name_cmp(file, flist->files[prev_i]) == 0)
1550                         j = prev_i;
1551                 else if (protocol_version >= 29 && S_ISDIR(file->mode)) {
1552                         int save_mode = file->mode;
1553                         /* Make sure that this directory doesn't duplicate a
1554                          * non-directory earlier in the list. */
1555                         flist->high = prev_i;
1556                         file->mode = S_IFREG;
1557                         j = flist_find(flist, file);
1558                         file->mode = save_mode;
1559                 } else
1560                         j = -1;
1561                 if (j >= 0) {
1562                         struct file_struct *fp = flist->files[j];
1563                         int keep, drop;
1564                         /* If one is a dir and the other is not, we want to
1565                          * keep the dir because it might have contents in the
1566                          * list. */
1567                         if (S_ISDIR(file->mode) != S_ISDIR(fp->mode)) {
1568                                 if (S_ISDIR(file->mode))
1569                                         keep = i, drop = j;
1570                                 else
1571                                         keep = j, drop = i;
1572                         } else
1573                                 keep = j, drop = i;
1574                         if (verbose > 1 && !am_server) {
1575                                 rprintf(FINFO,
1576                                         "removing duplicate name %s from file list (%d)\n",
1577                                         f_name(file, NULL), drop);
1578                         }
1579                         /* Make sure that if we unduplicate '.', that we don't
1580                          * lose track of a user-specified top directory. */
1581                         flist->files[keep]->flags |= flist->files[drop]->flags
1582                                                    & (FLAG_TOP_DIR|FLAG_DEL_HERE);
1583
1584                         clear_file(drop, flist);
1585
1586                         if (keep == i) {
1587                                 if (flist->low == drop) {
1588                                         for (j = drop + 1;
1589                                              j < i && !flist->files[j]->basename;
1590                                              j++) {}
1591                                         flist->low = j;
1592                                 }
1593                                 prev_i = i;
1594                         }
1595                 } else
1596                         prev_i = i;
1597         }
1598         flist->high = no_dups ? prev_i : flist->count - 1;
1599
1600         if (strip_root) {
1601                 /* We need to strip off the leading slashes for relative
1602                  * paths, but this must be done _after_ the sorting phase. */
1603                 for (i = flist->low; i <= flist->high; i++) {
1604                         struct file_struct *file = flist->files[i];
1605
1606                         if (!file->dirname)
1607                                 continue;
1608                         if (*file->dirname == '/') {
1609                                 char *s = file->dirname + 1;
1610                                 while (*s == '/') s++;
1611                                 memmove(file->dirname, s, strlen(s) + 1);
1612                         }
1613
1614                         if (!*file->dirname)
1615                                 file->dirname = NULL;
1616                 }
1617         }
1618 }
1619
1620 static void output_flist(struct file_list *flist)
1621 {
1622         char uidbuf[16], gidbuf[16], depthbuf[16];
1623         struct file_struct *file;
1624         const char *who = who_am_i();
1625         int i;
1626
1627         for (i = 0; i < flist->count; i++) {
1628                 file = flist->files[i];
1629                 if ((am_root || am_sender) && preserve_uid)
1630                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1631                 else
1632                         *uidbuf = '\0';
1633                 if (preserve_gid && file->gid != GID_NONE)
1634                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1635                 else
1636                         *gidbuf = '\0';
1637                 if (!am_sender)
1638                         sprintf(depthbuf, "%d", file->dir.depth);
1639                 rprintf(FINFO, "[%s] i=%d %s %s%s%s%s mode=0%o len=%.0f%s%s flags=%x\n",
1640                         who, i, am_sender ? NS(file->dir.root) : depthbuf,
1641                         file->dirname ? file->dirname : "",
1642                         file->dirname ? "/" : "", NS(file->basename),
1643                         S_ISDIR(file->mode) ? "/" : "", (int)file->mode,
1644                         (double)file->length, uidbuf, gidbuf, file->flags);
1645         }
1646 }
1647
1648 enum fnc_state { s_DIR, s_SLASH, s_BASE, s_TRAILING };
1649 enum fnc_type { t_PATH, t_ITEM };
1650
1651 /* Compare the names of two file_struct entities, similar to how strcmp()
1652  * would do if it were operating on the joined strings.
1653  *
1654  * Some differences beginning with protocol_version 29: (1) directory names
1655  * are compared with an assumed trailing slash so that they compare in a
1656  * way that would cause them to sort immediately prior to any content they
1657  * may have; (2) a directory of any name compares after a non-directory of
1658  * any name at the same depth; (3) a directory with name "." compares prior
1659  * to anything else.  These changes mean that a directory and a non-dir
1660  * with the same name will not compare as equal (protocol_version >= 29).
1661  *
1662  * The dirname component can be an empty string, but the basename component
1663  * cannot (and never is in the current codebase).  The basename component
1664  * may be NULL (for a removed item), in which case it is considered to be
1665  * after any existing item. */
1666 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1667 {
1668         int dif;
1669         const uchar *c1, *c2;
1670         enum fnc_state state1, state2;
1671         enum fnc_type type1, type2;
1672         enum fnc_type t_path = protocol_version >= 29 ? t_PATH : t_ITEM;
1673
1674         if (!f1 || !f1->basename) {
1675                 if (!f2 || !f2->basename)
1676                         return 0;
1677                 return -1;
1678         }
1679         if (!f2 || !f2->basename)
1680                 return 1;
1681
1682         c1 = (uchar*)f1->dirname;
1683         c2 = (uchar*)f2->dirname;
1684         if (c1 == c2)
1685                 c1 = c2 = NULL;
1686         if (!c1) {
1687                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
1688                 c1 = (uchar*)f1->basename;
1689                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
1690                         type1 = t_ITEM;
1691                         state1 = s_TRAILING;
1692                         c1 = (uchar*)"";
1693                 } else
1694                         state1 = s_BASE;
1695         } else if (!*c1) {
1696                 type1 = t_path;
1697                 state1 = s_SLASH;
1698                 c1 = (uchar*)"/";
1699         } else {
1700                 type1 = t_path;
1701                 state1 = s_DIR;
1702         }
1703         if (!c2) {
1704                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
1705                 c2 = (uchar*)f2->basename;
1706                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
1707                         type2 = t_ITEM;
1708                         state2 = s_TRAILING;
1709                         c2 = (uchar*)"";
1710                 } else
1711                         state2 = s_BASE;
1712         } else if (!*c2) {
1713                 type2 = t_path;
1714                 state2 = s_SLASH;
1715                 c2 = (uchar*)"/";
1716         } else {
1717                 type2 = t_path;
1718                 state2 = s_DIR;
1719         }
1720
1721         if (type1 != type2)
1722                 return type1 == t_PATH ? 1 : -1;
1723
1724         while (1) {
1725                 if ((dif = (int)*c1++ - (int)*c2++) != 0)
1726                         break;
1727                 if (!*c1) {
1728                         switch (state1) {
1729                         case s_DIR:
1730                                 state1 = s_SLASH;
1731                                 c1 = (uchar*)"/";
1732                                 break;
1733                         case s_SLASH:
1734                                 type1 = S_ISDIR(f1->mode) ? t_path : t_ITEM;
1735                                 c1 = (uchar*)f1->basename;
1736                                 if (type1 == t_PATH && *c1 == '.' && !c1[1]) {
1737                                         type1 = t_ITEM;
1738                                         state1 = s_TRAILING;
1739                                         c1 = (uchar*)"";
1740                                 } else
1741                                         state1 = s_BASE;
1742                                 break;
1743                         case s_BASE:
1744                                 state1 = s_TRAILING;
1745                                 if (type1 == t_PATH) {
1746                                         c1 = (uchar*)"/";
1747                                         break;
1748                                 }
1749                                 /* FALL THROUGH */
1750                         case s_TRAILING:
1751                                 type1 = t_ITEM;
1752                                 break;
1753                         }
1754                         if (*c2 && type1 != type2)
1755                                 return type1 == t_PATH ? 1 : -1;
1756                 }
1757                 if (!*c2) {
1758                         switch (state2) {
1759                         case s_DIR:
1760                                 state2 = s_SLASH;
1761                                 c2 = (uchar*)"/";
1762                                 break;
1763                         case s_SLASH:
1764                                 type2 = S_ISDIR(f2->mode) ? t_path : t_ITEM;
1765                                 c2 = (uchar*)f2->basename;
1766                                 if (type2 == t_PATH && *c2 == '.' && !c2[1]) {
1767                                         type2 = t_ITEM;
1768                                         state2 = s_TRAILING;
1769                                         c2 = (uchar*)"";
1770                                 } else
1771                                         state2 = s_BASE;
1772                                 break;
1773                         case s_BASE:
1774                                 state2 = s_TRAILING;
1775                                 if (type2 == t_PATH) {
1776                                         c2 = (uchar*)"/";
1777                                         break;
1778                                 }
1779                                 /* FALL THROUGH */
1780                         case s_TRAILING:
1781                                 if (!*c1)
1782                                         return 0;
1783                                 type2 = t_ITEM;
1784                                 break;
1785                         }
1786                         if (type1 != type2)
1787                                 return type1 == t_PATH ? 1 : -1;
1788                 }
1789         }
1790
1791         return dif;
1792 }
1793
1794 /* Return a copy of the full filename of a flist entry, using the indicated
1795  * buffer or one of 5 static buffers if fbuf is NULL.  No size-checking is
1796  * done because we checked the size when creating the file_struct entry.
1797  */
1798 char *f_name(struct file_struct *f, char *fbuf)
1799 {
1800         if (!f || !f->basename)
1801                 return NULL;
1802
1803         if (!fbuf) {
1804                 static char names[5][MAXPATHLEN];
1805                 static unsigned int n;
1806
1807                 n = (n + 1) % (sizeof names / sizeof names[0]);
1808
1809                 fbuf = names[n];
1810         }
1811
1812         if (f->dirname) {
1813                 int len = strlen(f->dirname);
1814                 memcpy(fbuf, f->dirname, len);
1815                 fbuf[len] = '/';
1816                 strcpy(fbuf + len + 1, f->basename);
1817         } else
1818                 strcpy(fbuf, f->basename);
1819
1820         return fbuf;
1821 }
1822
1823 /* Do a non-recursive scan of the named directory, possibly ignoring all
1824  * exclude rules except for the daemon's.  If "dlen" is >=0, it is the length
1825  * of the dirname string, and also indicates that "dirname" is a MAXPATHLEN
1826  * buffer (the functions we call will append names onto the end, but the old
1827  * dir value will be restored on exit). */
1828 struct file_list *get_dirlist(char *dirname, int dlen,
1829                               int ignore_filter_rules)
1830 {
1831         struct file_list *dirlist;
1832         char dirbuf[MAXPATHLEN];
1833         int save_recurse = recurse;
1834
1835         if (dlen < 0) {
1836                 dlen = strlcpy(dirbuf, dirname, MAXPATHLEN);
1837                 if (dlen >= MAXPATHLEN)
1838                         return NULL;
1839                 dirname = dirbuf;
1840         }
1841
1842         dirlist = flist_new(WITHOUT_HLINK, "get_dirlist");
1843
1844         recurse = 0;
1845         send_directory(ignore_filter_rules ? -2 : -1, dirlist, dirname, dlen);
1846         recurse = save_recurse;
1847         if (do_progress)
1848                 flist_count_offset += dirlist->count;
1849
1850         clean_flist(dirlist, 0, 0);
1851
1852         if (verbose > 3)
1853                 output_flist(dirlist);
1854
1855         return dirlist;
1856 }