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 struct stats stats;
  31
  32 extern int verbose;
  33 extern int do_progress;
  34 extern int am_root;
  35 extern int am_server;
  36 extern int am_daemon;
  37 extern int am_sender;
  38 extern int delete_during;
  39 extern int always_checksum;
  40 extern int module_id;
  41 extern int ignore_errors;
  42 extern int numeric_ids;
  43
  44 extern int recurse;
  45 extern int xfer_dirs;
  46 extern char curr_dir[MAXPATHLEN];
  47 extern unsigned int curr_dir_len;
  48 extern char *backup_dir;
  49 extern char *backup_suffix;
  50 extern int filesfrom_fd;
  51
  52 extern int one_file_system;
  53 extern int keep_dirlinks;
  54 extern int preserve_links;
  55 extern int preserve_hard_links;
  56 extern int preserve_perms;
  57 extern int preserve_devices;
  58 extern int preserve_uid;
  59 extern int preserve_gid;
  60 extern int relative_paths;
  61 extern int implied_dirs;
  62 extern int make_backups;
  63 extern int backup_suffix_len;
  64 extern int copy_links;
  65 extern int copy_unsafe_links;
  66 extern int protocol_version;
  67 extern int sanitize_paths;
  68 extern int delete_excluded;
  69 extern int max_delete;
  70 extern int orig_umask;
  71 extern int list_only;
  72
  73 extern struct filter_list_struct filter_list;
  74 extern struct filter_list_struct server_filter_list;
  75
  76 int io_error;
  77
  78 static char empty_sum[MD4_SUM_LENGTH];
  79 static unsigned int file_struct_len;
  80 static struct file_list *received_flist;
  81 static dev_t filesystem_dev; /* used to implement -x */
  82 static int deletion_count = 0; /* used to implement --max-delete */
  83
  84 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  85 static void output_flist(struct file_list *flist, const char *whose_list);
  86
  87 void init_flist(void)
  88 {
  89         struct file_struct f;
  90
  91         /* Figure out how big the file_struct is without trailing padding */
  92         file_struct_len = offsetof(struct file_struct, flags) + sizeof f.flags;
  93 }
  94
  95
  96 static int show_filelist_p(void)
  97 {
  98         return verbose && xfer_dirs && !am_server;
  99 }
 100
 101 static void start_filelist_progress(char *kind)
 102 {
 103         rprintf(FINFO, "%s ... ", kind);
 104         if (verbose > 1 || do_progress)
 105                 rprintf(FINFO, "\n");
 106         rflush(FINFO);
 107 }
 108
 109
 110 static void emit_filelist_progress(const struct file_list *flist)
 111 {
 112         rprintf(FINFO, " %d files...\r", flist->count);
 113 }
 114
 115
 116 static void maybe_emit_filelist_progress(const struct file_list *flist)
 117 {
 118         if (do_progress && show_filelist_p() && (flist->count % 100) == 0)
 119                 emit_filelist_progress(flist);
 120 }
 121
 122
 123 static void finish_filelist_progress(const struct file_list *flist)
 124 {
 125         if (do_progress) {
 126                 /* This overwrites the progress line */
 127                 rprintf(FINFO, "%d file%sto consider\n",
 128                         flist->count, flist->count == 1 ? " " : "s ");
 129         } else
 130                 rprintf(FINFO, "done\n");
 131 }
 132
 133 void show_flist_stats(void)
 134 {
 135         /* Nothing yet */
 136 }
 137
 138
 139 static void list_file_entry(struct file_struct *f)
 140 {
 141         char perms[11];
 142
 143         if (!f->basename) {
 144                 /* this can happen if duplicate names were removed */
 145                 return;
 146         }
 147
 148         permstring(perms, f->mode);
 149
 150 #if SUPPORT_LINKS
 151         if (preserve_links && S_ISLNK(f->mode)) {
 152                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 153                         perms,
 154                         (double)f->length, timestring(f->modtime),
 155                         f_name(f), f->u.link);
 156         } else
 157 #endif
 158         {
 159                 rprintf(FINFO, "%s %11.0f %s %s\n",
 160                         perms,
 161                         (double)f->length, timestring(f->modtime),
 162                         f_name(f));
 163         }
 164 }
 165
 166
 167 /**
 168  * Stat either a symlink or its referent, depending on the settings of
 169  * copy_links, copy_unsafe_links, etc.
 170  *
 171  * @retval -1 on error
 172  *
 173  * @retval 0 for success
 174  *
 175  * @post If @p path is a symlink, then @p linkbuf (of size @c
 176  * MAXPATHLEN) contains the symlink target.
 177  *
 178  * @post @p buffer contains information about the link or the
 179  * referrent as appropriate, if they exist.
 180  **/
 181 static int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 182 {
 183 #if SUPPORT_LINKS
 184         if (copy_links)
 185                 return do_stat(path, buffer);
 186         if (link_stat(path, buffer, 0) < 0)
 187                 return -1;
 188         if (S_ISLNK(buffer->st_mode)) {
 189                 int l = readlink((char *)path, linkbuf, MAXPATHLEN - 1);
 190                 if (l == -1)
 191                         return -1;
 192                 linkbuf[l] = 0;
 193                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 194                         if (verbose > 1) {
 195                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 196                                         path, linkbuf);
 197                         }
 198                         return do_stat(path, buffer);
 199                 }
 200         }
 201         return 0;
 202 #else
 203         return do_stat(path, buffer);
 204 #endif
 205 }
 206
 207 int link_stat(const char *path, STRUCT_STAT *buffer, int follow_dirlinks)
 208 {
 209 #if SUPPORT_LINKS
 210         if (copy_links)
 211                 return do_stat(path, buffer);
 212         if (do_lstat(path, buffer) < 0)
 213                 return -1;
 214         if (follow_dirlinks && S_ISLNK(buffer->st_mode)) {
 215                 STRUCT_STAT st;
 216                 if (do_stat(path, &st) == 0 && S_ISDIR(st.st_mode))
 217                         *buffer = st;
 218         }
 219         return 0;
 220 #else
 221         return do_stat(path, buffer);
 222 #endif
 223 }
 224
 225 /* This function is used to check if a file should be included/excluded
 226  * from the list of files based on its name and type etc.  The value of
 227  * filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
 228 static int is_excluded(char *fname, int is_dir, int filter_level)
 229 {
 230 #if 0 /* This currently never happens, so avoid a useless compare. */
 231         if (filter_level == NO_FILTERS)
 232                 return 0;
 233 #endif
 234         if (fname) {
 235                 /* never exclude '.', even if somebody does --exclude '*' */
 236                 if (fname[0] == '.' && !fname[1])
 237                         return 0;
 238                 /* Handle the -R version of the '.' dir. */
 239                 if (fname[0] == '/') {
 240                         int len = strlen(fname);
 241                         if (fname[len-1] == '.' && fname[len-2] == '/')
 242                                 return 0;
 243                 }
 244         }
 245         if (server_filter_list.head
 246             && check_filter(&server_filter_list, fname, is_dir) < 0)
 247                 return 1;
 248         if (filter_level != ALL_FILTERS)
 249                 return 0;
 250         if (filter_list.head
 251             && check_filter(&filter_list, fname, is_dir) < 0)
 252                 return 1;
 253         return 0;
 254 }
 255
 256 static int to_wire_mode(mode_t mode)
 257 {
 258 #if SUPPORT_LINKS
 259         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 260                 return (mode & ~(_S_IFMT)) | 0120000;
 261 #endif
 262         return (int)mode;
 263 }
 264
 265 static mode_t from_wire_mode(int mode)
 266 {
 267         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 268                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 269         return (mode_t)mode;
 270 }
 271
 272
 273 static void send_directory(int f, struct file_list *flist, char *dir);
 274
 275 static char *flist_dir;
 276 static int flist_dir_len;
 277
 278
 279 /**
 280  * Make sure @p flist is big enough to hold at least @p flist->count
 281  * entries.
 282  **/
 283 void flist_expand(struct file_list *flist)
 284 {
 285         struct file_struct **new_ptr;
 286
 287         if (flist->count < flist->malloced)
 288                 return;
 289
 290         if (flist->malloced < FLIST_START)
 291                 flist->malloced = FLIST_START;
 292         else if (flist->malloced >= FLIST_LINEAR)
 293                 flist->malloced += FLIST_LINEAR;
 294         else
 295                 flist->malloced *= 2;
 296
 297         /*
 298          * In case count jumped or we are starting the list
 299          * with a known size just set it.
 300          */
 301         if (flist->malloced < flist->count)
 302                 flist->malloced = flist->count;
 303
 304         new_ptr = realloc_array(flist->files, struct file_struct *,
 305                                 flist->malloced);
 306
 307         if (verbose >= 2 && flist->malloced != FLIST_START) {
 308                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 309                     who_am_i(),
 310                     (double)sizeof flist->files[0] * flist->malloced,
 311                     (new_ptr == flist->files) ? " not" : "");
 312         }
 313
 314         flist->files = new_ptr;
 315
 316         if (!flist->files)
 317                 out_of_memory("flist_expand");
 318 }
 319
 320 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 321 {
 322         unsigned short flags;
 323         static time_t modtime;
 324         static mode_t mode;
 325         static int64 dev;
 326         static dev_t rdev;
 327         static uint32 rdev_major;
 328         static uid_t uid;
 329         static gid_t gid;
 330         static char lastname[MAXPATHLEN];
 331         char fname[MAXPATHLEN];
 332         int l1, l2;
 333
 334         if (f == -1)
 335                 return;
 336
 337         if (!file) {
 338                 write_byte(f, 0);
 339                 modtime = 0, mode = 0;
 340                 dev = 0, rdev = makedev(0, 0);
 341                 rdev_major = 0;
 342                 uid = 0, gid = 0;
 343                 *lastname = '\0';
 344                 return;
 345         }
 346
 347         io_write_phase = "send_file_entry";
 348
 349         f_name_to(file, fname);
 350
 351         flags = base_flags;
 352
 353         if (file->mode == mode)
 354                 flags |= XMIT_SAME_MODE;
 355         else
 356                 mode = file->mode;
 357         if (preserve_devices) {
 358                 if (protocol_version < 28) {
 359                         if (IS_DEVICE(mode)) {
 360                                 if (file->u.rdev == rdev)
 361                                         flags |= XMIT_SAME_RDEV_pre28;
 362                                 else
 363                                         rdev = file->u.rdev;
 364                         } else
 365                                 rdev = makedev(0, 0);
 366                 } else if (IS_DEVICE(mode)) {
 367                         rdev = file->u.rdev;
 368                         if ((uint32)major(rdev) == rdev_major)
 369                                 flags |= XMIT_SAME_RDEV_MAJOR;
 370                         else
 371                                 rdev_major = major(rdev);
 372                         if ((uint32)minor(rdev) <= 0xFFu)
 373                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
 374                 }
 375         }
 376         if (file->uid == uid)
 377                 flags |= XMIT_SAME_UID;
 378         else
 379                 uid = file->uid;
 380         if (file->gid == gid)
 381                 flags |= XMIT_SAME_GID;
 382         else
 383                 gid = file->gid;
 384         if (file->modtime == modtime)
 385                 flags |= XMIT_SAME_TIME;
 386         else
 387                 modtime = file->modtime;
 388
 389 #if SUPPORT_HARD_LINKS
 390         if (file->link_u.idev) {
 391                 if (file->F_DEV == dev) {
 392                         if (protocol_version >= 28)
 393                                 flags |= XMIT_SAME_DEV;
 394                 } else
 395                         dev = file->F_DEV;
 396                 flags |= XMIT_HAS_IDEV_DATA;
 397         }
 398 #endif
 399
 400         for (l1 = 0;
 401             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 402             l1++) {}
 403         l2 = strlen(fname+l1);
 404
 405         if (l1 > 0)
 406                 flags |= XMIT_SAME_NAME;
 407         if (l2 > 255)
 408                 flags |= XMIT_LONG_NAME;
 409
 410         /* We must make sure we don't send a zero flag byte or the
 411          * other end will terminate the flist transfer.  Note that
 412          * the use of XMIT_DEL_START on a non-dir has no meaning, so
 413          * it's harmless way to add a bit to the first flag byte. */
 414         if (protocol_version >= 28) {
 415                 if (!flags && !S_ISDIR(mode))
 416                         flags |= XMIT_DEL_START;
 417                 if ((flags & 0xFF00) || !flags) {
 418                         flags |= XMIT_EXTENDED_FLAGS;
 419                         write_byte(f, flags);
 420                         write_byte(f, flags >> 8);
 421                 } else
 422                         write_byte(f, flags);
 423         } else {
 424                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 425                         flags |= XMIT_DEL_START;
 426                 if (!(flags & 0xFF))
 427                         flags |= XMIT_LONG_NAME;
 428                 write_byte(f, flags);
 429         }
 430         if (flags & XMIT_SAME_NAME)
 431                 write_byte(f, l1);
 432         if (flags & XMIT_LONG_NAME)
 433                 write_int(f, l2);
 434         else
 435                 write_byte(f, l2);
 436         write_buf(f, fname + l1, l2);
 437
 438         write_longint(f, file->length);
 439         if (!(flags & XMIT_SAME_TIME))
 440                 write_int(f, modtime);
 441         if (!(flags & XMIT_SAME_MODE))
 442                 write_int(f, to_wire_mode(mode));
 443         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 444                 if (!numeric_ids)
 445                         add_uid(uid);
 446                 write_int(f, uid);
 447         }
 448         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 449                 if (!numeric_ids)
 450                         add_gid(gid);
 451                 write_int(f, gid);
 452         }
 453         if (preserve_devices && IS_DEVICE(mode)) {
 454                 if (protocol_version < 28) {
 455                         if (!(flags & XMIT_SAME_RDEV_pre28))
 456                                 write_int(f, (int)rdev);
 457                 } else {
 458                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 459                                 write_int(f, major(rdev));
 460                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 461                                 write_byte(f, minor(rdev));
 462                         else
 463                                 write_int(f, minor(rdev));
 464                 }
 465         }
 466
 467 #if SUPPORT_LINKS
 468         if (preserve_links && S_ISLNK(mode)) {
 469                 int len = strlen(file->u.link);
 470                 write_int(f, len);
 471                 write_buf(f, file->u.link, len);
 472         }
 473 #endif
 474
 475 #if SUPPORT_HARD_LINKS
 476         if (flags & XMIT_HAS_IDEV_DATA) {
 477                 if (protocol_version < 26) {
 478                         /* 32-bit dev_t and ino_t */
 479                         write_int(f, dev);
 480                         write_int(f, file->F_INODE);
 481                 } else {
 482                         /* 64-bit dev_t and ino_t */
 483                         if (!(flags & XMIT_SAME_DEV))
 484                                 write_longint(f, dev);
 485                         write_longint(f, file->F_INODE);
 486                 }
 487         }
 488 #endif
 489
 490         if (always_checksum) {
 491                 char *sum;
 492                 if (S_ISREG(mode))
 493                         sum = file->u.sum;
 494                 else if (protocol_version < 28) {
 495                         /* Prior to 28, we sent a useless set of nulls. */
 496                         sum = empty_sum;
 497                 } else
 498                         sum = NULL;
 499                 if (sum) {
 500                         write_buf(f, sum,
 501                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 502                 }
 503         }
 504
 505         strlcpy(lastname, fname, MAXPATHLEN);
 506
 507         io_write_phase = "unknown";
 508 }
 509
 510
 511
 512 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
 513                         struct file_list *flist, int f)
 514 {
 515         static time_t modtime;
 516         static mode_t mode;
 517         static int64 dev;
 518         static dev_t rdev;
 519         static uint32 rdev_major;
 520         static uid_t uid;
 521         static gid_t gid;
 522         static char lastname[MAXPATHLEN], *lastdir;
 523         static int lastdir_depth, lastdir_len = -1;
 524         static unsigned int del_heir_name_len = 0;
 525         static int in_del_hier = 0;
 526         char thisname[MAXPATHLEN];
 527         unsigned int l1 = 0, l2 = 0;
 528         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 529         OFF_T file_length;
 530         char *basename, *dirname, *bp;
 531         struct file_struct *file;
 532
 533         if (!fptr) {
 534                 modtime = 0, mode = 0;
 535                 dev = 0, rdev = makedev(0, 0);
 536                 rdev_major = 0;
 537                 uid = 0, gid = 0;
 538                 *lastname = '\0';
 539                 lastdir_len = -1;
 540                 in_del_hier = 0;
 541                 return;
 542         }
 543
 544         if (flags & XMIT_SAME_NAME)
 545                 l1 = read_byte(f);
 546
 547         if (flags & XMIT_LONG_NAME)
 548                 l2 = read_int(f);
 549         else
 550                 l2 = read_byte(f);
 551
 552         if (l2 >= MAXPATHLEN - l1) {
 553                 rprintf(FERROR,
 554                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 555                         flags, l1, l2, lastname);
 556                 overflow("receive_file_entry");
 557         }
 558
 559         strlcpy(thisname, lastname, l1 + 1);
 560         read_sbuf(f, &thisname[l1], l2);
 561         thisname[l1 + l2] = 0;
 562
 563         strlcpy(lastname, thisname, MAXPATHLEN);
 564
 565         clean_fname(thisname, 0);
 566
 567         if (sanitize_paths)
 568                 sanitize_path(thisname, thisname, "", 0);
 569
 570         if ((basename = strrchr(thisname, '/')) != NULL) {
 571                 dirname_len = ++basename - thisname; /* counts future '\0' */
 572                 if (lastdir_len == dirname_len - 1
 573                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 574                         dirname = lastdir;
 575                         dirname_len = 0; /* indicates no copy is needed */
 576                 } else
 577                         dirname = thisname;
 578         } else {
 579                 basename = thisname;
 580                 dirname = NULL;
 581                 dirname_len = 0;
 582         }
 583         basename_len = strlen(basename) + 1; /* count the '\0' */
 584
 585         file_length = read_longint(f);
 586         if (!(flags & XMIT_SAME_TIME))
 587                 modtime = (time_t)read_int(f);
 588         if (!(flags & XMIT_SAME_MODE))
 589                 mode = from_wire_mode(read_int(f));
 590
 591         if (preserve_uid && !(flags & XMIT_SAME_UID))
 592                 uid = (uid_t)read_int(f);
 593         if (preserve_gid && !(flags & XMIT_SAME_GID))
 594                 gid = (gid_t)read_int(f);
 595
 596         if (preserve_devices) {
 597                 if (protocol_version < 28) {
 598                         if (IS_DEVICE(mode)) {
 599                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 600                                         rdev = (dev_t)read_int(f);
 601                         } else
 602                                 rdev = makedev(0, 0);
 603                 } else if (IS_DEVICE(mode)) {
 604                         uint32 rdev_minor;
 605                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
 606                                 rdev_major = read_int(f);
 607                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
 608                                 rdev_minor = read_byte(f);
 609                         else
 610                                 rdev_minor = read_int(f);
 611                         rdev = makedev(rdev_major, rdev_minor);
 612                 }
 613         }
 614
 615 #if SUPPORT_LINKS
 616         if (preserve_links && S_ISLNK(mode)) {
 617                 linkname_len = read_int(f) + 1; /* count the '\0' */
 618                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
 619                         rprintf(FERROR, "overflow: linkname_len=%d\n",
 620                                 linkname_len - 1);
 621                         overflow("receive_file_entry");
 622                 }
 623         }
 624         else
 625 #endif
 626                 linkname_len = 0;
 627
 628         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
 629
 630         alloc_len = file_struct_len + dirname_len + basename_len
 631                   + linkname_len + sum_len;
 632         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
 633
 634         file = *fptr = (struct file_struct *)bp;
 635         memset(bp, 0, file_struct_len);
 636         bp += file_struct_len;
 637
 638         file->flags = 0;
 639         file->modtime = modtime;
 640         file->length = file_length;
 641         file->mode = mode;
 642         file->uid = uid;
 643         file->gid = gid;
 644
 645         if (S_ISDIR(mode)) {
 646                 if (flags & XMIT_DEL_START) {
 647                         in_del_hier = 1;
 648                         del_heir_name_len = l1 + l2;
 649                         file->flags |= FLAG_DEL_START;
 650                 } else if (delete_during && in_del_hier) {
 651                         if (!relative_paths || (l1 >= del_heir_name_len
 652                             && thisname[del_heir_name_len] == '/'))
 653                                 file->flags |= FLAG_DEL_START;
 654                         else
 655                                 in_del_hier = 0;
 656                 }
 657         }
 658
 659         if (dirname_len) {
 660                 file->dirname = lastdir = bp;
 661                 lastdir_len = dirname_len - 1;
 662                 memcpy(bp, dirname, dirname_len - 1);
 663                 bp += dirname_len;
 664                 bp[-1] = '\0';
 665                 if (sanitize_paths)
 666                         lastdir_depth = count_dir_elements(lastdir);
 667         } else if (dirname)
 668                 file->dirname = dirname;
 669
 670         file->basename = bp;
 671         memcpy(bp, basename, basename_len);
 672         bp += basename_len;
 673
 674         if (preserve_devices && IS_DEVICE(mode))
 675                 file->u.rdev = rdev;
 676
 677 #if SUPPORT_LINKS
 678         if (linkname_len) {
 679                 file->u.link = bp;
 680                 read_sbuf(f, bp, linkname_len - 1);
 681                 if (sanitize_paths)
 682                         sanitize_path(bp, bp, "", lastdir_depth);
 683                 bp += linkname_len;
 684         }
 685 #endif
 686
 687 #if SUPPORT_HARD_LINKS
 688         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 689                 flags |= XMIT_HAS_IDEV_DATA;
 690         if (flags & XMIT_HAS_IDEV_DATA) {
 691                 int64 inode;
 692                 if (protocol_version < 26) {
 693                         dev = read_int(f);
 694                         inode = read_int(f);
 695                 } else {
 696                         if (!(flags & XMIT_SAME_DEV))
 697                                 dev = read_longint(f);
 698                         inode = read_longint(f);
 699                 }
 700                 if (flist->hlink_pool) {
 701                         file->link_u.idev = pool_talloc(flist->hlink_pool,
 702                             struct idev, 1, "inode_table");
 703                         file->F_INODE = inode;
 704                         file->F_DEV = dev;
 705                 }
 706         }
 707 #endif
 708
 709         if (always_checksum) {
 710                 char *sum;
 711                 if (sum_len) {
 712                         file->u.sum = sum = bp;
 713                         /*bp += sum_len;*/
 714                 } else if (protocol_version < 28) {
 715                         /* Prior to 28, we get a useless set of nulls. */
 716                         sum = empty_sum;
 717                 } else
 718                         sum = NULL;
 719                 if (sum) {
 720                         read_buf(f, sum,
 721                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
 722                 }
 723         }
 724
 725         if (!preserve_perms) {
 726                 /* set an appropriate set of permissions based on original
 727                  * permissions and umask. This emulates what GNU cp does */
 728                 file->mode &= ~orig_umask;
 729         }
 730 }
 731
 732
 733 /**
 734  * Create a file_struct for a named file by reading its stat()
 735  * information and performing extensive checks against global
 736  * options.
 737  *
 738  * @return the new file, or NULL if there was an error or this file
 739  * should be excluded.
 740  *
 741  * @todo There is a small optimization opportunity here to avoid
 742  * stat()ing the file in some circumstances, which has a certain cost.
 743  * We are called immediately after doing readdir(), and so we may
 744  * already know the d_type of the file.  We could for example avoid
 745  * statting directories if we're not recursing, but this is not a very
 746  * important case.  Some systems may not have d_type.
 747  **/
 748 struct file_struct *make_file(char *fname, struct file_list *flist,
 749                               int filter_level)
 750 {
 751         static char *lastdir;
 752         static int lastdir_len = -1;
 753         struct file_struct *file;
 754         STRUCT_STAT st;
 755         char sum[SUM_LENGTH];
 756         char thisname[MAXPATHLEN];
 757         char linkname[MAXPATHLEN];
 758         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
 759         char *basename, *dirname, *bp;
 760         unsigned short flags = 0;
 761
 762         if (!flist || !flist->count)    /* Ignore lastdir when invalid. */
 763                 lastdir_len = -1;
 764
 765         if (strlcpy(thisname, fname, sizeof thisname)
 766             >= sizeof thisname - flist_dir_len) {
 767                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 768                 return NULL;
 769         }
 770         clean_fname(thisname, 0);
 771         if (sanitize_paths)
 772                 sanitize_path(thisname, thisname, "", 0);
 773
 774         memset(sum, 0, SUM_LENGTH);
 775
 776         if (readlink_stat(thisname, &st, linkname) != 0) {
 777                 int save_errno = errno;
 778                 /* See if file is excluded before reporting an error. */
 779                 if (filter_level != NO_FILTERS
 780                     && is_excluded(thisname, 0, filter_level))
 781                         return NULL;
 782                 if (save_errno == ENOENT) {
 783 #if SUPPORT_LINKS
 784                         /* Avoid "vanished" error if symlink points nowhere. */
 785                         if (copy_links && do_lstat(thisname, &st) == 0
 786                             && S_ISLNK(st.st_mode)) {
 787                                 io_error |= IOERR_GENERAL;
 788                                 rprintf(FERROR, "symlink has no referent: %s\n",
 789                                         full_fname(thisname));
 790                         } else
 791 #endif
 792                         {
 793                                 enum logcode c = am_daemon && protocol_version < 28
 794                                     ? FERROR : FINFO;
 795                                 io_error |= IOERR_VANISHED;
 796                                 rprintf(c, "file has vanished: %s\n",
 797                                         full_fname(thisname));
 798                         }
 799                 } else {
 800                         io_error |= IOERR_GENERAL;
 801                         rsyserr(FERROR, save_errno, "readlink %s failed",
 802                                 full_fname(thisname));
 803                 }
 804                 return NULL;
 805         }
 806
 807         /* backup.c calls us with filter_level set to NO_FILTERS. */
 808         if (filter_level == NO_FILTERS)
 809                 goto skip_filters;
 810
 811         if (S_ISDIR(st.st_mode) && !xfer_dirs) {
 812                 rprintf(FINFO, "skipping directory %s\n", thisname);
 813                 return NULL;
 814         }
 815
 816         /* We only care about directories because we need to avoid recursing
 817          * into a mount-point directory, not to avoid copying a symlinked
 818          * file if -L (or similar) was specified. */
 819         if (one_file_system && st.st_dev != filesystem_dev
 820             && S_ISDIR(st.st_mode))
 821                 flags |= FLAG_MOUNT_POINT;
 822
 823         if (is_excluded(thisname, S_ISDIR(st.st_mode) != 0, filter_level))
 824                 return NULL;
 825
 826         if (lp_ignore_nonreadable(module_id)) {
 827 #if SUPPORT_LINKS
 828                 if (!S_ISLNK(st.st_mode))
 829 #endif
 830                         if (access(thisname, R_OK) != 0)
 831                                 return NULL;
 832         }
 833
 834 skip_filters:
 835
 836         if (verbose > 2) {
 837                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 838                         who_am_i(), thisname, filter_level);
 839         }
 840
 841         if ((basename = strrchr(thisname, '/')) != NULL) {
 842                 dirname_len = ++basename - thisname; /* counts future '\0' */
 843                 if (lastdir_len == dirname_len - 1
 844                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
 845                         dirname = lastdir;
 846                         dirname_len = 0; /* indicates no copy is needed */
 847                 } else
 848                         dirname = thisname;
 849         } else {
 850                 basename = thisname;
 851                 dirname = NULL;
 852                 dirname_len = 0;
 853         }
 854         basename_len = strlen(basename) + 1; /* count the '\0' */
 855
 856 #if SUPPORT_LINKS
 857         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
 858 #else
 859         linkname_len = 0;
 860 #endif
 861
 862         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
 863
 864         alloc_len = file_struct_len + dirname_len + basename_len
 865             + linkname_len + sum_len;
 866         if (flist) {
 867                 bp = pool_alloc(flist->file_pool, alloc_len,
 868                     "receive_file_entry");
 869         } else {
 870                 if (!(bp = new_array(char, alloc_len)))
 871                         out_of_memory("receive_file_entry");
 872         }
 873
 874         file = (struct file_struct *)bp;
 875         memset(bp, 0, file_struct_len);
 876         bp += file_struct_len;
 877
 878         file->flags = flags;
 879         file->modtime = st.st_mtime;
 880         file->length = st.st_size;
 881         file->mode = st.st_mode;
 882         file->uid = st.st_uid;
 883         file->gid = st.st_gid;
 884
 885 #if SUPPORT_HARD_LINKS
 886         if (flist && flist->hlink_pool) {
 887                 if (protocol_version < 28) {
 888                         if (S_ISREG(st.st_mode))
 889                                 file->link_u.idev = pool_talloc(
 890                                     flist->hlink_pool, struct idev, 1,
 891                                     "inode_table");
 892                 } else {
 893                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
 894                                 file->link_u.idev = pool_talloc(
 895                                     flist->hlink_pool, struct idev, 1,
 896                                     "inode_table");
 897                 }
 898         }
 899         if (file->link_u.idev) {
 900                 file->F_DEV = st.st_dev;
 901                 file->F_INODE = st.st_ino;
 902         }
 903 #endif
 904
 905         if (dirname_len) {
 906                 file->dirname = lastdir = bp;
 907                 lastdir_len = dirname_len - 1;
 908                 memcpy(bp, dirname, dirname_len - 1);
 909                 bp += dirname_len;
 910                 bp[-1] = '\0';
 911         } else if (dirname)
 912                 file->dirname = dirname;
 913
 914         file->basename = bp;
 915         memcpy(bp, basename, basename_len);
 916         bp += basename_len;
 917
 918 #if HAVE_STRUCT_STAT_ST_RDEV
 919         if (preserve_devices && IS_DEVICE(st.st_mode))
 920                 file->u.rdev = st.st_rdev;
 921 #endif
 922
 923 #if SUPPORT_LINKS
 924         if (linkname_len) {
 925                 file->u.link = bp;
 926                 memcpy(bp, linkname, linkname_len);
 927                 bp += linkname_len;
 928         }
 929 #endif
 930
 931         if (sum_len) {
 932                 file->u.sum = bp;
 933                 file_checksum(thisname, bp, st.st_size);
 934                 /*bp += sum_len;*/
 935         }
 936
 937         file->basedir = flist_dir;
 938
 939         /* This code is only used by the receiver when it is building
 940          * a list of files for a delete pass. */
 941         if (keep_dirlinks && linkname_len && flist) {
 942                 STRUCT_STAT st2;
 943                 int i = flist_find(received_flist, file);
 944                 if (i >= 0 && S_ISDIR(received_flist->files[i]->mode)
 945                     && do_stat(thisname, &st2) == 0 && S_ISDIR(st2.st_mode)) {
 946                         file->modtime = st2.st_mtime;
 947                         file->length = st2.st_size;
 948                         file->mode = st2.st_mode;
 949                         file->uid = st2.st_uid;
 950                         file->gid = st2.st_gid;
 951                         file->u.link = NULL;
 952                         if (file->link_u.idev) {
 953                                 pool_free(flist->hlink_pool, 0, file->link_u.idev);
 954                                 file->link_u.idev = NULL;
 955                         }
 956                 }
 957         }
 958
 959         if (!S_ISDIR(st.st_mode))
 960                 stats.total_size += st.st_size;
 961
 962         return file;
 963 }
 964
 965
 966 void send_file_name(int f, struct file_list *flist, char *fname,
 967                     int recursive, unsigned short base_flags)
 968 {
 969         struct file_struct *file;
 970         char fbuf[MAXPATHLEN];
 971
 972         /* f is set to -1 when calculating deletion file list */
 973         file = make_file(fname, flist,
 974             f == -1 && delete_excluded? SERVER_FILTERS : ALL_FILTERS);
 975
 976         if (!file)
 977                 return;
 978
 979         maybe_emit_filelist_progress(flist);
 980
 981         flist_expand(flist);
 982
 983         if (file->basename[0]) {
 984                 flist->files[flist->count++] = file;
 985                 send_file_entry(file, f, base_flags);
 986         }
 987
 988         if (recursive && S_ISDIR(file->mode)
 989             && !(file->flags & FLAG_MOUNT_POINT)) {
 990                 send_directory(f, flist, f_name_to(file, fbuf));
 991         }
 992 }
 993
 994
 995 /* Note that the "recurse" value either contains -1, for infinite recursion,
 996  * or a number >= 0 indicating how many levels of recursion we will allow. */
 997 static void send_directory(int f, struct file_list *flist, char *dir)
 998 {
 999         DIR *d;
1000         struct dirent *di;
1001         char fname[MAXPATHLEN];
1002         unsigned int offset;
1003         void *save_filters;
1004         char *p;
1005
1006         d = opendir(dir);
1007         if (!d) {
1008                 io_error |= IOERR_GENERAL;
1009                 rsyserr(FERROR, errno, "opendir %s failed", full_fname(dir));
1010                 return;
1011         }
1012
1013         offset = strlcpy(fname, dir, MAXPATHLEN);
1014         p = fname + offset;
1015         if (offset >= MAXPATHLEN || p[-1] != '/') {
1016                 if (offset >= MAXPATHLEN - 1) {
1017                         io_error |= IOERR_GENERAL;
1018                         rprintf(FERROR, "skipping long-named directory: %s\n",
1019                                 full_fname(fname));
1020                         closedir(d);
1021                         return;
1022                 }
1023                 *p++ = '/';
1024                 offset++;
1025         }
1026
1027         save_filters = push_local_filters(fname, offset);
1028
1029         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1030                 char *dname = d_name(di);
1031                 if (dname[0] == '.' && (dname[1] == '\0'
1032                     || (dname[1] == '.' && dname[2] == '\0')))
1033                         continue;
1034                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset) {
1035                         int do_subdirs = recurse >= 1 ? recurse-- : recurse;
1036                         send_file_name(f, flist, fname, do_subdirs, 0);
1037                 } else {
1038                         io_error |= IOERR_GENERAL;
1039                         rprintf(FINFO,
1040                                 "cannot send long-named file %s\n",
1041                                 full_fname(fname));
1042                 }
1043         }
1044         if (errno) {
1045                 io_error |= IOERR_GENERAL;
1046                 rsyserr(FERROR, errno, "readdir(%s)", dir);
1047         }
1048
1049         pop_local_filters(save_filters);
1050
1051         closedir(d);
1052 }
1053
1054
1055 /* This function is normally called by the sender, but the receiving side
1056  * also uses it to construct one or more file lists if one of the --delete
1057  * options have been specified.  The delete_files() function sets f to -1
1058  * so that we just construct the file list in memory without sending it
1059  * over the wire.  It also has the side-effect of ignoring user-excludes if
1060  * delete_excluded is set (so that the delete list includes user-excluded
1061  * files). */
1062 struct file_list *send_file_list(int f, int argc, char *argv[])
1063 {
1064         int l;
1065         STRUCT_STAT st;
1066         char *p, *dir, olddir[sizeof curr_dir];
1067         char lastpath[MAXPATHLEN] = "";
1068         struct file_list *flist;
1069         BOOL need_first_push = True;
1070         struct timeval start_tv, end_tv;
1071         int64 start_write;
1072         int use_ff_fd = 0;
1073
1074         if (show_filelist_p() && f != -1)
1075                 start_filelist_progress("building file list");
1076
1077         start_write = stats.total_written;
1078         gettimeofday(&start_tv, NULL);
1079
1080         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1081                           "send_file_list");
1082
1083         if (f != -1) {
1084                 io_start_buffering_out();
1085                 if (filesfrom_fd >= 0) {
1086                         if (argv[0] && !push_dir(argv[0])) {
1087                                 rsyserr(FERROR, errno, "push_dir %s failed",
1088                                         full_fname(argv[0]));
1089                                 exit_cleanup(RERR_FILESELECT);
1090                         }
1091                         use_ff_fd = 1;
1092                         if (curr_dir_len < MAXPATHLEN - 1) {
1093                                 push_local_filters(curr_dir, curr_dir_len);
1094                                 need_first_push = False;
1095                         }
1096                 }
1097         }
1098
1099         while (1) {
1100                 char fname2[MAXPATHLEN];
1101                 char *fname = fname2;
1102                 int do_subdirs;
1103
1104                 if (use_ff_fd) {
1105                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1106                                 break;
1107                         sanitize_path(fname, fname, "", 0);
1108                 } else {
1109                         if (argc-- == 0)
1110                                 break;
1111                         strlcpy(fname, *argv++, MAXPATHLEN);
1112                         if (sanitize_paths)
1113                                 sanitize_path(fname, fname, "", 0);
1114                 }
1115
1116                 l = strlen(fname);
1117                 if (!l || fname[l - 1] == '/') {
1118                         if (l == 2 && fname[0] == '.') {
1119                                 /* Turn "./" into just "." rather than "./." */
1120                                 fname[1] = '\0';
1121                         } else if (l < MAXPATHLEN) {
1122                                 fname[l++] = '.';
1123                                 fname[l] = '\0';
1124                         }
1125                 }
1126                 if (fname[l-1] == '.' && (l == 1 || fname[l-2] == '/')) {
1127                         if (!recurse && xfer_dirs)
1128                                 recurse = 1; /* allow one level */
1129                 } else if (recurse > 0)
1130                         recurse = 0;
1131
1132                 if (need_first_push) {
1133                         if ((p = strrchr(fname, '/')) != NULL) {
1134                                 if (*++p && strcmp(p, ".") != 0)
1135                                         push_local_filters(fname, p - fname);
1136                         } else if (strcmp(fname, ".") != 0)
1137                                 push_local_filters(fname, 0);
1138                         need_first_push = False;
1139                 }
1140
1141                 if (link_stat(fname, &st, keep_dirlinks) != 0) {
1142                         if (f != -1) {
1143                                 io_error |= IOERR_GENERAL;
1144                                 rsyserr(FERROR, errno, "link_stat %s failed",
1145                                         full_fname(fname));
1146                         }
1147                         continue;
1148                 }
1149
1150                 if (S_ISDIR(st.st_mode) && !xfer_dirs) {
1151                         rprintf(FINFO, "skipping directory %s\n", fname);
1152                         continue;
1153                 }
1154
1155                 dir = NULL;
1156                 olddir[0] = '\0';
1157
1158                 if (!relative_paths) {
1159                         p = strrchr(fname, '/');
1160                         if (p) {
1161                                 *p = 0;
1162                                 if (p == fname)
1163                                         dir = "/";
1164                                 else
1165                                         dir = fname;
1166                                 fname = p + 1;
1167                         }
1168                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1169                         /* this ensures we send the intermediate directories,
1170                            thus getting their permissions right */
1171                         char *lp = lastpath, *fn = fname, *slash = fname;
1172                         *p = 0;
1173                         /* Skip any initial directories in our path that we
1174                          * have in common with lastpath. */
1175                         while (*fn && *lp == *fn) {
1176                                 if (*fn == '/')
1177                                         slash = fn;
1178                                 lp++, fn++;
1179                         }
1180                         *p = '/';
1181                         if (fn != p || (*lp && *lp != '/')) {
1182                                 int save_copy_links = copy_links;
1183                                 int save_xfer_dirs = xfer_dirs;
1184                                 copy_links = copy_unsafe_links;
1185                                 xfer_dirs = 1;
1186                                 while ((slash = strchr(slash+1, '/')) != 0) {
1187                                         *slash = 0;
1188                                         send_file_name(f, flist, fname, 0, 0);
1189                                         *slash = '/';
1190                                 }
1191                                 copy_links = save_copy_links;
1192                                 xfer_dirs = save_xfer_dirs;
1193                                 *p = 0;
1194                                 strlcpy(lastpath, fname, sizeof lastpath);
1195                                 *p = '/';
1196                         }
1197                 }
1198
1199                 if (!*fname)
1200                         fname = ".";
1201
1202                 if (dir && *dir) {
1203                         static char *lastdir;
1204                         static int lastdir_len;
1205
1206                         strcpy(olddir, curr_dir); /* can't overflow */
1207
1208                         if (!push_dir(dir)) {
1209                                 io_error |= IOERR_GENERAL;
1210                                 rsyserr(FERROR, errno, "push_dir %s failed",
1211                                         full_fname(dir));
1212                                 continue;
1213                         }
1214
1215                         if (lastdir && strcmp(lastdir, dir) == 0) {
1216                                 flist_dir = lastdir;
1217                                 flist_dir_len = lastdir_len;
1218                         } else {
1219                                 flist_dir = lastdir = strdup(dir);
1220                                 flist_dir_len = lastdir_len = strlen(dir);
1221                         }
1222                 }
1223
1224                 if (one_file_system)
1225                         filesystem_dev = st.st_dev;
1226
1227                 do_subdirs = recurse >= 1 ? recurse-- : recurse;
1228                 send_file_name(f, flist, fname, do_subdirs, XMIT_DEL_START);
1229
1230                 if (olddir[0]) {
1231                         flist_dir = NULL;
1232                         flist_dir_len = 0;
1233                         if (!pop_dir(olddir)) {
1234                                 rsyserr(FERROR, errno, "pop_dir %s failed",
1235                                         full_fname(dir));
1236                                 exit_cleanup(RERR_FILESELECT);
1237                         }
1238                 }
1239         }
1240
1241         if (f != -1) {
1242                 gettimeofday(&end_tv, NULL);
1243                 stats.flist_buildtime =
1244                     (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1245                          + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1246                 if (stats.flist_buildtime == 0)
1247                         stats.flist_buildtime = 1;
1248                 start_tv = end_tv;
1249
1250                 send_file_entry(NULL, f, 0);
1251
1252                 if (show_filelist_p())
1253                         finish_filelist_progress(flist);
1254
1255                 gettimeofday(&end_tv, NULL);
1256                 stats.flist_xfertime =
1257                     (int64)(end_tv.tv_sec - start_tv.tv_sec) * 1000
1258                          + (end_tv.tv_usec - start_tv.tv_usec) / 1000;
1259         }
1260
1261         if (flist->hlink_pool) {
1262                 pool_destroy(flist->hlink_pool);
1263                 flist->hlink_pool = NULL;
1264         }
1265
1266         clean_flist(flist, 0, 0);
1267
1268         if (f != -1) {
1269                 /* Now send the uid/gid list. This was introduced in
1270                  * protocol version 15 */
1271                 send_uid_list(f);
1272
1273                 /* send the io_error flag */
1274                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1275
1276                 io_end_buffering();
1277                 stats.flist_size = stats.total_written - start_write;
1278                 stats.num_files = flist->count;
1279         }
1280
1281         if (verbose > 3)
1282                 output_flist(flist, f < 0 ? "delete" : who_am_i());
1283
1284         if (verbose > 2)
1285                 rprintf(FINFO, "send_file_list done\n");
1286
1287         return flist;
1288 }
1289
1290
1291 struct file_list *recv_file_list(int f)
1292 {
1293         struct file_list *flist;
1294         unsigned short flags;
1295         int64 start_read;
1296
1297         if (show_filelist_p())
1298                 start_filelist_progress("receiving file list");
1299
1300         start_read = stats.total_read;
1301
1302         flist = flist_new(WITH_HLINK, "recv_file_list");
1303         received_flist = flist;
1304
1305         flist->count = 0;
1306         flist->malloced = 1000;
1307         flist->files = new_array(struct file_struct *, flist->malloced);
1308         if (!flist->files)
1309                 goto oom;
1310
1311
1312         while ((flags = read_byte(f)) != 0) {
1313                 int i = flist->count;
1314
1315                 flist_expand(flist);
1316
1317                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1318                         flags |= read_byte(f) << 8;
1319                 receive_file_entry(&flist->files[i], flags, flist, f);
1320
1321                 if (S_ISREG(flist->files[i]->mode))
1322                         stats.total_size += flist->files[i]->length;
1323
1324                 flist->count++;
1325
1326                 maybe_emit_filelist_progress(flist);
1327
1328                 if (verbose > 2) {
1329                         rprintf(FINFO, "recv_file_name(%s)\n",
1330                                 f_name(flist->files[i]));
1331                 }
1332         }
1333         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1334
1335         if (verbose > 2)
1336                 rprintf(FINFO, "received %d names\n", flist->count);
1337
1338         if (show_filelist_p())
1339                 finish_filelist_progress(flist);
1340
1341         clean_flist(flist, relative_paths, 1);
1342
1343         if (f != -1) {
1344                 /* Now send the uid/gid list. This was introduced in
1345                  * protocol version 15 */
1346                 recv_uid_list(f, flist);
1347
1348                 /* Recv the io_error flag */
1349                 if (lp_ignore_errors(module_id) || ignore_errors)
1350                         read_int(f);
1351                 else
1352                         io_error |= read_int(f);
1353         }
1354
1355         if (verbose > 3)
1356                 output_flist(flist, who_am_i());
1357
1358         if (list_only) {
1359                 int i;
1360                 for (i = 0; i < flist->count; i++)
1361                         list_file_entry(flist->files[i]);
1362         }
1363
1364         if (verbose > 2)
1365                 rprintf(FINFO, "recv_file_list done\n");
1366
1367         stats.flist_size = stats.total_read - start_read;
1368         stats.num_files = flist->count;
1369
1370         return flist;
1371
1372 oom:
1373         out_of_memory("recv_file_list");
1374         return NULL;            /* not reached */
1375 }
1376
1377
1378 int file_compare(struct file_struct **file1, struct file_struct **file2)
1379 {
1380         struct file_struct *f1 = *file1;
1381         struct file_struct *f2 = *file2;
1382
1383         if (!f1->basename && !f2->basename)
1384                 return 0;
1385         if (!f1->basename)
1386                 return -1;
1387         if (!f2->basename)
1388                 return 1;
1389         if (f1->dirname == f2->dirname)
1390                 return u_strcmp(f1->basename, f2->basename);
1391         return f_name_cmp(f1, f2);
1392 }
1393
1394
1395 int flist_find(struct file_list *flist, struct file_struct *f)
1396 {
1397         int low = 0, high = flist->count - 1;
1398
1399         while (high >= 0 && !flist->files[high]->basename) high--;
1400
1401         if (high < 0)
1402                 return -1;
1403
1404         while (low != high) {
1405                 int mid = (low + high) / 2;
1406                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1407                 if (ret == 0)
1408                         return flist_up(flist, mid);
1409                 if (ret > 0)
1410                         high = mid;
1411                 else
1412                         low = mid + 1;
1413         }
1414
1415         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1416                 return flist_up(flist, low);
1417         return -1;
1418 }
1419
1420 /*
1421  * Free up any resources a file_struct has allocated
1422  * and clear the file.
1423  */
1424 void clear_file(int i, struct file_list *flist)
1425 {
1426         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1427                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1428         memset(flist->files[i], 0, file_struct_len);
1429 }
1430
1431
1432 /*
1433  * allocate a new file list
1434  */
1435 struct file_list *flist_new(int with_hlink, char *msg)
1436 {
1437         struct file_list *flist;
1438
1439         flist = new(struct file_list);
1440         if (!flist)
1441                 out_of_memory(msg);
1442
1443         memset(flist, 0, sizeof (struct file_list));
1444
1445         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1446             out_of_memory, POOL_INTERN)))
1447                 out_of_memory(msg);
1448
1449 #if SUPPORT_HARD_LINKS
1450         if (with_hlink && preserve_hard_links) {
1451                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1452                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1453                         out_of_memory(msg);
1454         }
1455 #endif
1456
1457         return flist;
1458 }
1459
1460 /*
1461  * free up all elements in a flist
1462  */
1463 void flist_free(struct file_list *flist)
1464 {
1465         pool_destroy(flist->file_pool);
1466         pool_destroy(flist->hlink_pool);
1467         free(flist->files);
1468         free(flist);
1469 }
1470
1471
1472 /*
1473  * This routine ensures we don't have any duplicate names in our file list.
1474  * duplicate names can cause corruption because of the pipelining
1475  */
1476 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1477 {
1478         int i, prev_i = 0;
1479
1480         if (!flist || flist->count == 0)
1481                 return;
1482
1483         qsort(flist->files, flist->count,
1484             sizeof flist->files[0], (int (*)())file_compare);
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         while (++i < flist->count) {
1493                 if (!flist->files[i]->basename)
1494                         continue;
1495                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1496                         if (verbose > 1 && !am_server) {
1497                                 rprintf(FINFO,
1498                                         "removing duplicate name %s from file list %d\n",
1499                                         f_name(flist->files[i]), i);
1500                         }
1501                         /* Make sure that if we unduplicate '.', that we don't
1502                          * lose track of a user-specified starting point (or
1503                          * else deletions will mysteriously fail with -R). */
1504                         if (flist->files[i]->flags & FLAG_DEL_START)
1505                                 flist->files[prev_i]->flags |= FLAG_DEL_START;
1506
1507                         clear_file(i, flist);
1508                 } else
1509                         prev_i = i;
1510         }
1511
1512         if (strip_root) {
1513                 /* we need to strip off the root directory in the case
1514                    of relative paths, but this must be done _after_
1515                    the sorting phase */
1516                 for (i = 0; i < flist->count; i++) {
1517                         if (flist->files[i]->dirname &&
1518                             flist->files[i]->dirname[0] == '/') {
1519                                 memmove(&flist->files[i]->dirname[0],
1520                                         &flist->files[i]->dirname[1],
1521                                         strlen(flist->files[i]->dirname));
1522                         }
1523
1524                         if (flist->files[i]->dirname &&
1525                             !flist->files[i]->dirname[0]) {
1526                                 flist->files[i]->dirname = NULL;
1527                         }
1528                 }
1529         }
1530 }
1531
1532 static void output_flist(struct file_list *flist, const char *whose_list)
1533 {
1534         char uidbuf[16], gidbuf[16];
1535         struct file_struct *file;
1536         int i;
1537
1538         for (i = 0; i < flist->count; i++) {
1539                 file = flist->files[i];
1540                 if ((am_root || am_sender) && preserve_uid)
1541                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1542                 else
1543                         *uidbuf = '\0';
1544                 if (preserve_gid && file->gid != GID_NONE)
1545                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1546                 else
1547                         *gidbuf = '\0';
1548                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1549                         whose_list, i, NS(file->basedir), NS(file->dirname),
1550                         NS(file->basename), (int)file->mode,
1551                         (double)file->length, uidbuf, gidbuf);
1552         }
1553 }
1554
1555
1556 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1557
1558 /* Compare the names of two file_struct entities, just like strcmp()
1559  * would do if it were operating on the joined strings.  We assume
1560  * that there are no 0-length strings.
1561  */
1562 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1563 {
1564         int dif;
1565         const uchar *c1, *c2;
1566         enum fnc_state state1, state2;
1567
1568         if (!f1 || !f1->basename) {
1569                 if (!f2 || !f2->basename)
1570                         return 0;
1571                 return -1;
1572         }
1573         if (!f2 || !f2->basename)
1574                 return 1;
1575
1576         if (!(c1 = (uchar*)f1->dirname)) {
1577                 state1 = fnc_BASE;
1578                 c1 = (uchar*)f1->basename;
1579         } else if (!*c1) {
1580                 state1 = fnc_SLASH;
1581                 c1 = (uchar*)"/";
1582         } else
1583                 state1 = fnc_DIR;
1584         if (!(c2 = (uchar*)f2->dirname)) {
1585                 state2 = fnc_BASE;
1586                 c2 = (uchar*)f2->basename;
1587         } else if (!*c2) {
1588                 state2 = fnc_SLASH;
1589                 c2 = (uchar*)"/";
1590         } else
1591                 state2 = fnc_DIR;
1592
1593         while (1) {
1594                 if ((dif = (int)*c1 - (int)*c2) != 0)
1595                         break;
1596                 if (!*++c1) {
1597                         switch (state1) {
1598                         case fnc_DIR:
1599                                 state1 = fnc_SLASH;
1600                                 c1 = (uchar*)"/";
1601                                 break;
1602                         case fnc_SLASH:
1603                                 state1 = fnc_BASE;
1604                                 c1 = (uchar*)f1->basename;
1605                                 break;
1606                         case fnc_BASE:
1607                                 break;
1608                         }
1609                 }
1610                 if (!*++c2) {
1611                         switch (state2) {
1612                         case fnc_DIR:
1613                                 state2 = fnc_SLASH;
1614                                 c2 = (uchar*)"/";
1615                                 break;
1616                         case fnc_SLASH:
1617                                 state2 = fnc_BASE;
1618                                 c2 = (uchar*)f2->basename;
1619                                 break;
1620                         case fnc_BASE:
1621                                 if (!*c1)
1622                                         return 0;
1623                                 break;
1624                         }
1625                 }
1626         }
1627
1628         return dif;
1629 }
1630
1631
1632 /* Return a copy of the full filename of a flist entry, using the indicated
1633  * buffer.  No size-checking is done because we checked the size when creating
1634  * the file_struct entry.
1635  */
1636 char *f_name_to(struct file_struct *f, char *fbuf)
1637 {
1638         if (!f || !f->basename)
1639                 return NULL;
1640
1641         if (f->dirname) {
1642                 int len = strlen(f->dirname);
1643                 memcpy(fbuf, f->dirname, len);
1644                 fbuf[len] = '/';
1645                 strcpy(fbuf + len + 1, f->basename);
1646         } else
1647                 strcpy(fbuf, f->basename);
1648         return fbuf;
1649 }
1650
1651
1652 /* Like f_name_to(), but we rotate through 5 static buffers of our own. */
1653 char *f_name(struct file_struct *f)
1654 {
1655         static char names[5][MAXPATHLEN];
1656         static unsigned int n;
1657
1658         n = (n + 1) % (sizeof names / sizeof names[0]);
1659
1660         return f_name_to(f, names[n]);
1661 }
1662
1663
1664 static int is_backup_file(char *fn)
1665 {
1666         int k = strlen(fn) - backup_suffix_len;
1667         return k > 0 && strcmp(fn+k, backup_suffix) == 0;
1668 }
1669
1670
1671 /* This function is used to implement --delete-during. */
1672 void delete_in_dir(struct file_list *flist, char *fname)
1673 {
1674         struct file_list *dir_list;
1675         STRUCT_STAT st;
1676         int save_recurse = recurse;
1677
1678         if (max_delete && deletion_count >= max_delete)
1679                 return;
1680
1681         if (io_error && !(lp_ignore_errors(module_id) || ignore_errors)) {
1682                 rprintf(FINFO, "IO error encountered - skipping file deletion\n");
1683                 max_delete = -1; /* avoid duplicating the above warning */
1684                 return;
1685         }
1686
1687         if (link_stat(fname, &st, keep_dirlinks) < 0)
1688                 return;
1689
1690         if (one_file_system)
1691                 filesystem_dev = st.st_dev;
1692
1693         dir_list = flist_new(WITHOUT_HLINK, "delete_in_dir");
1694         recurse = 1; /* allow only one level */
1695         send_file_name(-1, dir_list, fname, 1, XMIT_DEL_START);
1696         recurse = save_recurse;
1697         clean_flist(dir_list, 0, 0);
1698
1699         if (verbose > 3)
1700                 output_flist(dir_list, "delete");
1701
1702         delete_missing(flist, dir_list, fname);
1703
1704         flist_free(dir_list);
1705 }
1706
1707
1708 /* If an item in dir_list is not found in full_list, delete it from the
1709  * filesystem. */
1710 void delete_missing(struct file_list *full_list, struct file_list *dir_list,
1711                     const char *dirname)
1712 {
1713         int i, j, mode;
1714
1715         if (max_delete && deletion_count >= max_delete)
1716                 return;
1717
1718         if (verbose > 1)
1719                 rprintf(FINFO, "deleting in %s\n", safe_fname(dirname));
1720
1721         for (i = dir_list->count-1; i >= 0; i--) {
1722                 if (!dir_list->files[i]->basename)
1723                         continue;
1724                 mode = dir_list->files[i]->mode;
1725                 if ((j = flist_find(full_list, dir_list->files[i])) < 0
1726                     || (delete_during && S_ISDIR(mode)
1727                      && !S_ISDIR(full_list->files[j]->mode))) {
1728                         char *f = f_name(dir_list->files[i]);
1729                         if (make_backups && (backup_dir || !is_backup_file(f))
1730                           && !S_ISDIR(mode)) {
1731                                 make_backup(f);
1732                                 if (verbose) {
1733                                         rprintf(FINFO, "deleting %s\n",
1734                                                 safe_fname(f));
1735                                 }
1736                         } else {
1737                                 int dflags = delete_during
1738                                     ? DEL_DIR | DEL_FORCE_RECURSE
1739                                     : DEL_DIR | DEL_NO_RECURSE;
1740                                 delete_file(f, S_ISDIR(mode) ? dflags : 0);
1741                         }
1742                         deletion_count++;
1743                         if (max_delete && deletion_count >= max_delete)
1744                                 break;
1745                 }
1746         }
1747 }