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