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  * @todo Get rid of the string_area optimization.  Efficiently
  25  * allocating blocks is the responsibility of the system's malloc
  26  * library, not of rsync.
  27  *
  28  * @sa http://lists.samba.org/pipermail/rsync/2000-June/002351.html
  29  *
  30  **/
  31
  32 #include "rsync.h"
  33
  34 extern struct stats stats;
  35
  36 extern int verbose;
  37 extern int do_progress;
  38 extern int am_server;
  39 extern int always_checksum;
  40
  41 extern int cvs_exclude;
  42
  43 extern int recurse;
  44 extern char *files_from;
  45 extern int filesfrom_fd;
  46
  47 extern int one_file_system;
  48 extern int make_backups;
  49 extern int preserve_links;
  50 extern int preserve_hard_links;
  51 extern int preserve_perms;
  52 extern int preserve_devices;
  53 extern int preserve_uid;
  54 extern int preserve_gid;
  55 extern int preserve_times;
  56 extern int relative_paths;
  57 extern int implied_dirs;
  58 extern int copy_links;
  59 extern int copy_unsafe_links;
  60 extern int protocol_version;
  61 extern int sanitize_paths;
  62
  63 extern int read_batch;
  64 extern int write_batch;
  65
  66 extern struct exclude_struct **exclude_list;
  67 extern struct exclude_struct **server_exclude_list;
  68 extern struct exclude_struct **local_exclude_list;
  69
  70 int io_error;
  71
  72 static struct file_struct null_file;
  73
  74 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  75
  76
  77 static int show_filelist_p(void)
  78 {
  79         return verbose && (recurse || files_from) && !am_server;
  80 }
  81
  82 static void start_filelist_progress(char *kind)
  83 {
  84         rprintf(FINFO, "%s ... ", kind);
  85         if ((verbose > 1) || do_progress)
  86                 rprintf(FINFO, "\n");
  87         rflush(FINFO);
  88 }
  89
  90
  91 static void emit_filelist_progress(const struct file_list *flist)
  92 {
  93         rprintf(FINFO, " %d files...\r", flist->count);
  94 }
  95
  96
  97 static void maybe_emit_filelist_progress(const struct file_list *flist)
  98 {
  99         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
 100                 emit_filelist_progress(flist);
 101 }
 102
 103
 104 static void finish_filelist_progress(const struct file_list *flist)
 105 {
 106         if (do_progress) {
 107                 /* This overwrites the progress line */
 108                 rprintf(FINFO, "%d file%sto consider\n",
 109                         flist->count, flist->count == 1 ? " " : "s ");
 110         } else
 111                 rprintf(FINFO, "done\n");
 112 }
 113
 114 void show_flist_stats(void)
 115 {
 116         /* Nothing yet */
 117 }
 118
 119
 120 static struct string_area *string_area_new(int size)
 121 {
 122         struct string_area *a;
 123
 124         if (size <= 0)
 125                 size = ARENA_SIZE;
 126         a = new(struct string_area);
 127         if (!a)
 128                 out_of_memory("string_area_new");
 129         a->current = a->base = new_array(char, size);
 130         if (!a->current)
 131                 out_of_memory("string_area_new buffer");
 132         a->end = a->base + size;
 133         a->next = NULL;
 134
 135         return a;
 136 }
 137
 138 static void string_area_free(struct string_area *a)
 139 {
 140         struct string_area *next;
 141
 142         for (; a; a = next) {
 143                 next = a->next;
 144                 free(a->base);
 145         }
 146 }
 147
 148 static char *string_area_malloc(struct string_area **ap, int size)
 149 {
 150         char *p;
 151         struct string_area *a;
 152
 153         /* does the request fit into the current space? */
 154         a = *ap;
 155         if (a->current + size >= a->end) {
 156                 /* no; get space, move new string_area to front of the list */
 157                 a = string_area_new(size > ARENA_SIZE ? size : ARENA_SIZE);
 158                 a->next = *ap;
 159                 *ap = a;
 160         }
 161
 162         /* have space; do the "allocation." */
 163         p = a->current;
 164         a->current += size;
 165         return p;
 166 }
 167
 168 static char *string_area_strdup(struct string_area **ap, const char *src)
 169 {
 170         char *dest = string_area_malloc(ap, strlen(src) + 1);
 171         return strcpy(dest, src);
 172 }
 173
 174 static void list_file_entry(struct file_struct *f)
 175 {
 176         char perms[11];
 177
 178         if (!f->basename)
 179                 /* this can happen if duplicate names were removed */
 180                 return;
 181
 182         permstring(perms, f->mode);
 183
 184         if (preserve_links && S_ISLNK(f->mode)) {
 185                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 186                         perms,
 187                         (double) f->length, timestring(f->modtime),
 188                         f_name(f), f->link);
 189         } else {
 190                 rprintf(FINFO, "%s %11.0f %s %s\n",
 191                         perms,
 192                         (double) f->length, timestring(f->modtime),
 193                         f_name(f));
 194         }
 195 }
 196
 197
 198 /**
 199  * Stat either a symlink or its referent, depending on the settings of
 200  * copy_links, copy_unsafe_links, etc.
 201  *
 202  * @retval -1 on error
 203  *
 204  * @retval 0 for success
 205  *
 206  * @post If @p path is a symlink, then @p linkbuf (of size @c
 207  * MAXPATHLEN) contains the symlink target.
 208  *
 209  * @post @p buffer contains information about the link or the
 210  * referrent as appropriate, if they exist.
 211  **/
 212 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 213 {
 214 #if SUPPORT_LINKS
 215         if (copy_links)
 216                 return do_stat(path, buffer);
 217         if (do_lstat(path, buffer) == -1)
 218                 return -1;
 219         if (S_ISLNK(buffer->st_mode)) {
 220                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
 221                 if (l == -1)
 222                         return -1;
 223                 linkbuf[l] = 0;
 224                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 225                         if (verbose > 1) {
 226                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 227                                         path, linkbuf);
 228                         }
 229                         return do_stat(path, buffer);
 230                 }
 231         }
 232         return 0;
 233 #else
 234         return do_stat(path, buffer);
 235 #endif
 236 }
 237
 238 int link_stat(const char *path, STRUCT_STAT * buffer)
 239 {
 240 #if SUPPORT_LINKS
 241         if (copy_links)
 242                 return do_stat(path, buffer);
 243         return do_lstat(path, buffer);
 244 #else
 245         return do_stat(path, buffer);
 246 #endif
 247 }
 248
 249 /*
 250  * This function is used to check if a file should be included/excluded
 251  * from the list of files based on its name and type etc.  The value of
 252  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 253  */
 254 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 255 {
 256 #if 0 /* This currently never happens, so avoid a useless compare. */
 257         if (exclude_level == NO_EXCLUDES)
 258                 return 0;
 259 #endif
 260         if (fname) {
 261                 /* never exclude '.', even if somebody does --exclude '*' */
 262                 if (fname[0] == '.' && !fname[1])
 263                         return 0;
 264                 /* Handle the -R version of the '.' dir. */
 265                 if (fname[0] == '/') {
 266                         int len = strlen(fname);
 267                         if (fname[len-1] == '.' && fname[len-2] == '/')
 268                                 return 0;
 269                 }
 270         }
 271         if (server_exclude_list
 272          && check_exclude(server_exclude_list, fname, is_dir))
 273                 return 1;
 274         if (exclude_level != ALL_EXCLUDES)
 275                 return 0;
 276         if (exclude_list && check_exclude(exclude_list, fname, is_dir))
 277                 return 1;
 278         if (local_exclude_list
 279          && check_exclude(local_exclude_list, fname, is_dir))
 280                 return 1;
 281         return 0;
 282 }
 283
 284 /* used by the one_file_system code */
 285 static dev_t filesystem_dev;
 286
 287 static void set_filesystem(char *fname)
 288 {
 289         STRUCT_STAT st;
 290         if (link_stat(fname, &st) != 0)
 291                 return;
 292         filesystem_dev = st.st_dev;
 293 }
 294
 295
 296 static int to_wire_mode(mode_t mode)
 297 {
 298         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 299                 return (mode & ~(_S_IFMT)) | 0120000;
 300         return (int) mode;
 301 }
 302
 303 static mode_t from_wire_mode(int mode)
 304 {
 305         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 306                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 307         return (mode_t) mode;
 308 }
 309
 310
 311 static void send_directory(int f, struct file_list *flist, char *dir);
 312
 313 static char *flist_dir;
 314
 315
 316 /**
 317  * Make sure @p flist is big enough to hold at least @p flist->count
 318  * entries.
 319  **/
 320 static void flist_expand(struct file_list *flist)
 321 {
 322         if (flist->count >= flist->malloced) {
 323                 void *new_ptr;
 324
 325                 if (flist->malloced < 1000)
 326                         flist->malloced += 1000;
 327                 else
 328                         flist->malloced *= 2;
 329
 330                 if (flist->files) {
 331                         new_ptr = realloc_array(flist->files,
 332                                                 struct file_struct *,
 333                                                 flist->malloced);
 334                 } else {
 335                         new_ptr = new_array(struct file_struct *,
 336                                             flist->malloced);
 337                 }
 338
 339                 if (verbose >= 2) {
 340                         rprintf(FINFO, "expand file_list to %.0f bytes, did%s move\n",
 341                                 (double)sizeof(flist->files[0])
 342                                 * flist->malloced,
 343                                 (new_ptr == flist->files) ? " not" : "");
 344                 }
 345
 346                 flist->files = (struct file_struct **) new_ptr;
 347
 348                 if (!flist->files)
 349                         out_of_memory("flist_expand");
 350         }
 351 }
 352
 353
 354 static void send_file_entry(struct file_struct *file, int f,
 355                             unsigned base_flags)
 356 {
 357         unsigned char flags;
 358         static time_t last_time;
 359         static mode_t last_mode;
 360         static DEV64_T last_rdev;
 361         static uid_t last_uid;
 362         static gid_t last_gid;
 363         static char lastname[MAXPATHLEN];
 364         char *fname, fbuf[MAXPATHLEN];
 365         int l1, l2;
 366
 367         if (f == -1)
 368                 return;
 369
 370         if (!file) {
 371                 write_byte(f, 0);
 372                 return;
 373         }
 374
 375         io_write_phase = "send_file_entry";
 376
 377         fname = f_name_to(file, fbuf, sizeof fbuf);
 378
 379         flags = base_flags;
 380
 381         if (file->mode == last_mode)
 382                 flags |= SAME_MODE;
 383         if (file->rdev == last_rdev)
 384                 flags |= SAME_RDEV;
 385         if (file->uid == last_uid)
 386                 flags |= SAME_UID;
 387         if (file->gid == last_gid)
 388                 flags |= SAME_GID;
 389         if (file->modtime == last_time)
 390                 flags |= SAME_TIME;
 391
 392         for (l1 = 0;
 393              lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 394              l1++) {}
 395         l2 = strlen(fname) - l1;
 396
 397         if (l1 > 0)
 398                 flags |= SAME_NAME;
 399         if (l2 > 255)
 400                 flags |= LONG_NAME;
 401
 402         /* we must make sure we don't send a zero flags byte or the other
 403            end will terminate the flist transfer */
 404         if (flags == 0 && !S_ISDIR(file->mode))
 405                 flags |= FLAG_DELETE;
 406         if (flags == 0)
 407                 flags |= LONG_NAME;
 408
 409         write_byte(f, flags);
 410         if (flags & SAME_NAME)
 411                 write_byte(f, l1);
 412         if (flags & LONG_NAME)
 413                 write_int(f, l2);
 414         else
 415                 write_byte(f, l2);
 416         write_buf(f, fname + l1, l2);
 417
 418         write_longint(f, file->length);
 419         if (!(flags & SAME_TIME))
 420                 write_int(f, (int) file->modtime);
 421         if (!(flags & SAME_MODE))
 422                 write_int(f, to_wire_mode(file->mode));
 423         if (preserve_uid && !(flags & SAME_UID)) {
 424                 add_uid(file->uid);
 425                 write_int(f, (int) file->uid);
 426         }
 427         if (preserve_gid && !(flags & SAME_GID)) {
 428                 add_gid(file->gid);
 429                 write_int(f, (int) file->gid);
 430         }
 431         if (preserve_devices && IS_DEVICE(file->mode)
 432             && !(flags & SAME_RDEV))
 433                 write_int(f, (int) file->rdev);
 434
 435 #if SUPPORT_LINKS
 436         if (preserve_links && S_ISLNK(file->mode)) {
 437                 write_int(f, strlen(file->link));
 438                 write_buf(f, file->link, strlen(file->link));
 439         }
 440 #endif
 441
 442 #if SUPPORT_HARD_LINKS
 443         if (preserve_hard_links && S_ISREG(file->mode)) {
 444                 if (protocol_version < 26) {
 445                         /* 32-bit dev_t and ino_t */
 446                         write_int(f, (int) file->dev);
 447                         write_int(f, (int) file->inode);
 448                 } else {
 449                         /* 64-bit dev_t and ino_t */
 450                         write_longint(f, file->dev);
 451                         write_longint(f, file->inode);
 452                 }
 453         }
 454 #endif
 455
 456         if (always_checksum) {
 457                 if (protocol_version < 21)
 458                         write_buf(f, file->sum, 2);
 459                 else
 460                         write_buf(f, file->sum, MD4_SUM_LENGTH);
 461         }
 462
 463         last_mode = file->mode;
 464         last_rdev = file->rdev;
 465         last_uid = file->uid;
 466         last_gid = file->gid;
 467         last_time = file->modtime;
 468
 469         strlcpy(lastname, fname, MAXPATHLEN);
 470         lastname[MAXPATHLEN - 1] = 0;
 471
 472         io_write_phase = "unknown";
 473 }
 474
 475
 476
 477 static void receive_file_entry(struct file_struct **fptr,
 478                                unsigned flags, int f)
 479 {
 480         static time_t last_time;
 481         static mode_t last_mode;
 482         static DEV64_T last_rdev;
 483         static uid_t last_uid;
 484         static gid_t last_gid;
 485         static char lastname[MAXPATHLEN];
 486         char thisname[MAXPATHLEN];
 487         unsigned int l1 = 0, l2 = 0;
 488         char *p;
 489         struct file_struct *file;
 490
 491         if (flags & SAME_NAME)
 492                 l1 = read_byte(f);
 493
 494         if (flags & LONG_NAME)
 495                 l2 = read_int(f);
 496         else
 497                 l2 = read_byte(f);
 498
 499         file = new(struct file_struct);
 500         if (!file)
 501                 out_of_memory("receive_file_entry");
 502         memset((char *) file, 0, sizeof(*file));
 503         (*fptr) = file;
 504
 505         if (l2 >= MAXPATHLEN - l1) {
 506                 rprintf(FERROR,
 507                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 508                         flags, l1, l2, lastname);
 509                 overflow("receive_file_entry");
 510         }
 511
 512         strlcpy(thisname, lastname, l1 + 1);
 513         read_sbuf(f, &thisname[l1], l2);
 514         thisname[l1 + l2] = 0;
 515
 516         strlcpy(lastname, thisname, MAXPATHLEN);
 517         lastname[MAXPATHLEN - 1] = 0;
 518
 519         clean_fname(thisname);
 520
 521         if (sanitize_paths) {
 522                 sanitize_path(thisname, NULL);
 523         }
 524
 525         if ((p = strrchr(thisname, '/'))) {
 526                 static char *lastdir;
 527                 *p = 0;
 528                 if (lastdir && strcmp(thisname, lastdir) == 0)
 529                         file->dirname = lastdir;
 530                 else {
 531                         file->dirname = strdup(thisname);
 532                         lastdir = file->dirname;
 533                 }
 534                 file->basename = strdup(p + 1);
 535         } else {
 536                 file->dirname = NULL;
 537                 file->basename = strdup(thisname);
 538         }
 539
 540         if (!file->basename)
 541                 out_of_memory("receive_file_entry 1");
 542
 543         file->flags = flags;
 544         file->length = read_longint(f);
 545         file->modtime = (flags & SAME_TIME) ? last_time : (time_t)read_int(f);
 546         file->mode = (flags & SAME_MODE) ? last_mode
 547                                          : from_wire_mode(read_int(f));
 548         if (preserve_uid)
 549                 file->uid = (flags & SAME_UID) ? last_uid : (uid_t)read_int(f);
 550         if (preserve_gid)
 551                 file->gid = (flags & SAME_GID) ? last_gid : (gid_t)read_int(f);
 552         if (preserve_devices && IS_DEVICE(file->mode)) {
 553                 file->rdev = (flags & SAME_RDEV) ? last_rdev
 554                                                  : (DEV64_T)read_int(f);
 555         }
 556
 557         if (preserve_links && S_ISLNK(file->mode)) {
 558                 int l = read_int(f);
 559                 if (l < 0) {
 560                         rprintf(FERROR, "overflow: l=%d\n", l);
 561                         overflow("receive_file_entry");
 562                 }
 563                 file->link = new_array(char, l + 1);
 564                 if (!file->link)
 565                         out_of_memory("receive_file_entry 2");
 566                 read_sbuf(f, file->link, l);
 567                 if (sanitize_paths)
 568                         sanitize_path(file->link, file->dirname);
 569         }
 570 #if SUPPORT_HARD_LINKS
 571         if (preserve_hard_links && S_ISREG(file->mode)) {
 572                 if (protocol_version < 26) {
 573                         file->dev = read_int(f);
 574                         file->inode = read_int(f);
 575                 } else {
 576                         file->dev = read_longint(f);
 577                         file->inode = read_longint(f);
 578                 }
 579         }
 580 #endif
 581
 582         if (always_checksum) {
 583                 file->sum = new_array(char, MD4_SUM_LENGTH);
 584                 if (!file->sum)
 585                         out_of_memory("md4 sum");
 586                 if (protocol_version < 21)
 587                         read_buf(f, file->sum, 2);
 588                 else
 589                         read_buf(f, file->sum, MD4_SUM_LENGTH);
 590         }
 591
 592         last_mode = file->mode;
 593         last_rdev = file->rdev;
 594         last_uid = file->uid;
 595         last_gid = file->gid;
 596         last_time = file->modtime;
 597
 598         if (!preserve_perms) {
 599                 extern int orig_umask;
 600                 /* set an appropriate set of permissions based on original
 601                    permissions and umask. This emulates what GNU cp does */
 602                 file->mode &= ~orig_umask;
 603         }
 604 }
 605
 606
 607 /* determine if a file in a different filesstem should be skipped
 608    when one_file_system is set. We bascally only want to include
 609    the mount points - but they can be hard to find! */
 610 static int skip_filesystem(char *fname, STRUCT_STAT * st)
 611 {
 612         STRUCT_STAT st2;
 613         char *p = strrchr(fname, '/');
 614
 615         /* skip all but directories */
 616         if (!S_ISDIR(st->st_mode))
 617                 return 1;
 618
 619         /* if its not a subdirectory then allow */
 620         if (!p)
 621                 return 0;
 622
 623         *p = 0;
 624         if (link_stat(fname, &st2)) {
 625                 *p = '/';
 626                 return 0;
 627         }
 628         *p = '/';
 629
 630         return (st2.st_dev != filesystem_dev);
 631 }
 632
 633 #define STRDUP(ap, p)   (ap ? string_area_strdup(ap, p) : strdup(p))
 634 /* IRIX cc cares that the operands to the ternary have the same type. */
 635 #define MALLOC(ap, i)   (ap ? (void*) string_area_malloc(ap, i) : malloc(i))
 636
 637 /**
 638  * Create a file_struct for a named file by reading its stat()
 639  * information and performing extensive checks against global
 640  * options.
 641  *
 642  * @return the new file, or NULL if there was an error or this file
 643  * should be excluded.
 644  *
 645  * @todo There is a small optimization opportunity here to avoid
 646  * stat()ing the file in some circumstances, which has a certain cost.
 647  * We are called immediately after doing readdir(), and so we may
 648  * already know the d_type of the file.  We could for example avoid
 649  * statting directories if we're not recursing, but this is not a very
 650  * important case.  Some systems may not have d_type.
 651  **/
 652 struct file_struct *make_file(char *fname, struct string_area **ap,
 653                               int exclude_level)
 654 {
 655         struct file_struct *file;
 656         STRUCT_STAT st;
 657         char sum[SUM_LENGTH];
 658         char *p;
 659         char cleaned_name[MAXPATHLEN];
 660         char linkbuf[MAXPATHLEN];
 661         extern int module_id;
 662
 663         strlcpy(cleaned_name, fname, MAXPATHLEN);
 664         cleaned_name[MAXPATHLEN - 1] = 0;
 665         clean_fname(cleaned_name);
 666         if (sanitize_paths)
 667                 sanitize_path(cleaned_name, NULL);
 668         fname = cleaned_name;
 669
 670         memset(sum, 0, SUM_LENGTH);
 671
 672         if (readlink_stat(fname, &st, linkbuf) != 0) {
 673                 int save_errno = errno;
 674                 if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
 675                         /* either symlink pointing nowhere or file that
 676                          * was removed during rsync run; see if excluded
 677                          * before reporting an error */
 678                         if (check_exclude_file(fname, 0, exclude_level)) {
 679                                 /* file is excluded anyway, ignore silently */
 680                                 return NULL;
 681                         }
 682                 }
 683                 io_error |= IOERR_GENERAL;
 684                 rprintf(FERROR, "readlink %s failed: %s\n",
 685                         full_fname(fname), strerror(save_errno));
 686                 return NULL;
 687         }
 688
 689         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 690         if (exclude_level == NO_EXCLUDES)
 691                 goto skip_excludes;
 692
 693         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 694                 rprintf(FINFO, "skipping directory %s\n", fname);
 695                 return NULL;
 696         }
 697
 698         if (one_file_system && st.st_dev != filesystem_dev) {
 699                 if (skip_filesystem(fname, &st))
 700                         return NULL;
 701         }
 702
 703         if (check_exclude_file(fname, S_ISDIR(st.st_mode) != 0, exclude_level))
 704                 return NULL;
 705
 706         if (lp_ignore_nonreadable(module_id) && access(fname, R_OK) != 0)
 707                 return NULL;
 708
 709       skip_excludes:
 710
 711         if (verbose > 2)
 712                 rprintf(FINFO, "make_file(%s,*,%d)\n", fname, exclude_level);
 713
 714         file = new(struct file_struct);
 715         if (!file)
 716                 out_of_memory("make_file");
 717         memset((char *) file, 0, sizeof(*file));
 718
 719         if ((p = strrchr(fname, '/'))) {
 720                 static char *lastdir;
 721                 *p = 0;
 722                 if (lastdir && strcmp(fname, lastdir) == 0)
 723                         file->dirname = lastdir;
 724                 else {
 725                         file->dirname = strdup(fname);
 726                         lastdir = file->dirname;
 727                 }
 728                 file->basename = STRDUP(ap, p + 1);
 729                 *p = '/';
 730         } else {
 731                 file->dirname = NULL;
 732                 file->basename = STRDUP(ap, fname);
 733         }
 734
 735         file->modtime = st.st_mtime;
 736         file->length = st.st_size;
 737         file->mode = st.st_mode;
 738         file->uid = st.st_uid;
 739         file->gid = st.st_gid;
 740         file->dev = st.st_dev;
 741         file->inode = st.st_ino;
 742 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 743         file->rdev = st.st_rdev;
 744 #endif
 745
 746 #if SUPPORT_LINKS
 747         if (S_ISLNK(st.st_mode))
 748                 file->link = STRDUP(ap, linkbuf);
 749 #endif
 750
 751         if (always_checksum) {
 752                 file->sum = (char *) MALLOC(ap, MD4_SUM_LENGTH);
 753                 if (!file->sum)
 754                         out_of_memory("md4 sum");
 755                 /* drat. we have to provide a null checksum for non-regular
 756                    files in order to be compatible with earlier versions
 757                    of rsync */
 758                 if (S_ISREG(st.st_mode)) {
 759                         file_checksum(fname, file->sum, st.st_size);
 760                 } else {
 761                         memset(file->sum, 0, MD4_SUM_LENGTH);
 762                 }
 763         }
 764
 765         if (flist_dir) {
 766                 static char *lastdir;
 767                 if (lastdir && strcmp(lastdir, flist_dir) == 0)
 768                         file->basedir = lastdir;
 769                 else {
 770                         file->basedir = strdup(flist_dir);
 771                         lastdir = file->basedir;
 772                 }
 773         } else
 774                 file->basedir = NULL;
 775
 776         if (!S_ISDIR(st.st_mode))
 777                 stats.total_size += st.st_size;
 778
 779         return file;
 780 }
 781
 782
 783 void send_file_name(int f, struct file_list *flist, char *fname,
 784                     int recursive, unsigned base_flags)
 785 {
 786         struct file_struct *file;
 787         char fbuf[MAXPATHLEN];
 788         extern int delete_excluded;
 789
 790         /* f is set to -1 when calculating deletion file list */
 791         file = make_file(fname, &flist->string_area,
 792                          f == -1 && delete_excluded? SERVER_EXCLUDES
 793                                                    : ALL_EXCLUDES);
 794
 795         if (!file)
 796                 return;
 797
 798         maybe_emit_filelist_progress(flist);
 799
 800         flist_expand(flist);
 801
 802         if (write_batch)
 803                 file->flags = FLAG_DELETE;
 804
 805         if (file->basename[0]) {
 806                 flist->files[flist->count++] = file;
 807                 send_file_entry(file, f, base_flags);
 808         }
 809
 810         if (S_ISDIR(file->mode) && recursive) {
 811                 struct exclude_struct **last_exclude_list =
 812                     local_exclude_list;
 813                 send_directory(f, flist, f_name_to(file, fbuf, sizeof fbuf));
 814                 local_exclude_list = last_exclude_list;
 815                 return;
 816         }
 817 }
 818
 819
 820 static void send_directory(int f, struct file_list *flist, char *dir)
 821 {
 822         DIR *d;
 823         struct dirent *di;
 824         char fname[MAXPATHLEN];
 825         int l;
 826         char *p;
 827
 828         d = opendir(dir);
 829         if (!d) {
 830                 io_error |= IOERR_GENERAL;
 831                 rprintf(FERROR, "opendir %s failed: %s\n",
 832                         full_fname(dir), strerror(errno));
 833                 return;
 834         }
 835
 836         strlcpy(fname, dir, MAXPATHLEN);
 837         l = strlen(fname);
 838         if (fname[l - 1] != '/') {
 839                 if (l == MAXPATHLEN - 1) {
 840                         io_error |= IOERR_GENERAL;
 841                         rprintf(FERROR, "skipping long-named directory: %s\n",
 842                                 full_fname(fname));
 843                         closedir(d);
 844                         return;
 845                 }
 846                 strlcat(fname, "/", MAXPATHLEN);
 847                 l++;
 848         }
 849         p = fname + strlen(fname);
 850
 851         local_exclude_list = NULL;
 852
 853         if (cvs_exclude) {
 854                 if (strlen(fname) + strlen(".cvsignore") <= MAXPATHLEN - 1) {
 855                         strcpy(p, ".cvsignore");
 856                         add_exclude_file(&exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 857                 } else {
 858                         io_error |= IOERR_GENERAL;
 859                         rprintf(FINFO,
 860                                 "cannot cvs-exclude in long-named directory %s\n",
 861                                 full_fname(fname));
 862                 }
 863         }
 864
 865         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 866                 char *dname = d_name(di);
 867                 if (dname[0] == '.' && (dname[1] == '\0'
 868                     || (dname[1] == '.' && dname[2] == '\0')))
 869                         continue;
 870                 strlcpy(p, dname, MAXPATHLEN - l);
 871                 send_file_name(f, flist, fname, recurse, 0);
 872         }
 873         if (errno) {
 874                 io_error |= IOERR_GENERAL;
 875                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
 876                     dir, errno, strerror(errno));
 877         }
 878
 879         if (local_exclude_list)
 880                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
 881
 882         closedir(d);
 883 }
 884
 885
 886 /**
 887  * The delete_files() function in receiver.c sets f to -1 so that we just
 888  * construct the file list in memory without sending it over the wire.  It
 889  * also has the side-effect of ignoring user-excludes if delete_excluded
 890  * is set (so that the delete list includes user-excluded files).
 891  **/
 892 struct file_list *send_file_list(int f, int argc, char *argv[])
 893 {
 894         int l;
 895         STRUCT_STAT st;
 896         char *p, *dir, *olddir;
 897         char lastpath[MAXPATHLEN] = "";
 898         struct file_list *flist;
 899         int64 start_write;
 900         int use_ff_fd = 0;
 901
 902         if (show_filelist_p() && f != -1)
 903                 start_filelist_progress("building file list");
 904
 905         start_write = stats.total_written;
 906
 907         flist = flist_new();
 908
 909         if (f != -1) {
 910                 io_start_buffering_out(f);
 911                 if (filesfrom_fd >= 0) {
 912                         if (argv[0] && !push_dir(argv[0], 0)) {
 913                                 rprintf(FERROR, "push_dir %s failed: %s\n",
 914                                         full_fname(argv[0]), strerror(errno));
 915                                 exit_cleanup(RERR_FILESELECT);
 916                         }
 917                         use_ff_fd = 1;
 918                 }
 919         }
 920
 921         while (1) {
 922                 char fname2[MAXPATHLEN];
 923                 char *fname = fname2;
 924
 925                 if (use_ff_fd) {
 926                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
 927                                 break;
 928                         sanitize_path(fname, NULL);
 929                 } else {
 930                         if (argc-- == 0)
 931                                 break;
 932                         strlcpy(fname, *argv++, MAXPATHLEN);
 933                         if (sanitize_paths)
 934                                 sanitize_path(fname, NULL);
 935                 }
 936
 937                 l = strlen(fname);
 938                 if (fname[l - 1] == '/') {
 939                         if (l == 2 && fname[0] == '.') {
 940                                 /* Turn "./" into just "." rather than "./." */
 941                                 fname[1] = '\0';
 942                         } else {
 943                                 strlcat(fname, ".", MAXPATHLEN);
 944                         }
 945                 }
 946
 947                 if (link_stat(fname, &st) != 0) {
 948                         if (f != -1) {
 949                                 io_error |= IOERR_GENERAL;
 950                                 rprintf(FERROR, "link_stat %s failed: %s\n",
 951                                         full_fname(fname), strerror(errno));
 952                         }
 953                         continue;
 954                 }
 955
 956                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 957                         rprintf(FINFO, "skipping directory %s\n", fname);
 958                         continue;
 959                 }
 960
 961                 dir = NULL;
 962                 olddir = NULL;
 963
 964                 if (!relative_paths) {
 965                         p = strrchr(fname, '/');
 966                         if (p) {
 967                                 *p = 0;
 968                                 if (p == fname)
 969                                         dir = "/";
 970                                 else
 971                                         dir = fname;
 972                                 fname = p + 1;
 973                         }
 974                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
 975                         /* this ensures we send the intermediate directories,
 976                            thus getting their permissions right */
 977                         char *lp = lastpath, *fn = fname, *slash = fname;
 978                         *p = 0;
 979                         /* Skip any initial directories in our path that we
 980                          * have in common with lastpath. */
 981                         while (*fn && *lp == *fn) {
 982                                 if (*fn == '/')
 983                                         slash = fn;
 984                                 lp++, fn++;
 985                         }
 986                         *p = '/';
 987                         if (fn != p || (*lp && *lp != '/')) {
 988                                 int copy_links_saved = copy_links;
 989                                 int recurse_saved = recurse;
 990                                 copy_links = copy_unsafe_links;
 991                                 /* set recurse to 1 to prevent make_file
 992                                  * from ignoring directory, but still
 993                                  * turn off the recursive parameter to
 994                                  * send_file_name */
 995                                 recurse = 1;
 996                                 while ((slash = strchr(slash+1, '/')) != 0) {
 997                                         *slash = 0;
 998                                         send_file_name(f, flist, fname, 0, 0);
 999                                         *slash = '/';
1000                                 }
1001                                 copy_links = copy_links_saved;
1002                                 recurse = recurse_saved;
1003                                 *p = 0;
1004                                 strlcpy(lastpath, fname, sizeof lastpath);
1005                                 *p = '/';
1006                         }
1007                 }
1008
1009                 if (!*fname)
1010                         fname = ".";
1011
1012                 if (dir && *dir) {
1013                         olddir = push_dir(dir, 1);
1014
1015                         if (!olddir) {
1016                                 io_error |= IOERR_GENERAL;
1017                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1018                                         full_fname(dir), strerror(errno));
1019                                 continue;
1020                         }
1021
1022                         flist_dir = dir;
1023                 }
1024
1025                 if (one_file_system)
1026                         set_filesystem(fname);
1027
1028                 send_file_name(f, flist, fname, recurse, FLAG_DELETE);
1029
1030                 if (olddir != NULL) {
1031                         flist_dir = NULL;
1032                         if (pop_dir(olddir) != 0) {
1033                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1034                                         full_fname(dir), strerror(errno));
1035                                 exit_cleanup(RERR_FILESELECT);
1036                         }
1037                 }
1038         }
1039
1040         if (f != -1)
1041                 send_file_entry(NULL, f, 0);
1042
1043         if (show_filelist_p() && f != -1)
1044                 finish_filelist_progress(flist);
1045
1046         clean_flist(flist, 0, 0);
1047
1048         /* now send the uid/gid list. This was introduced in protocol
1049            version 15 */
1050         if (f != -1)
1051                 send_uid_list(f);
1052
1053         /* send the io_error flag */
1054         if (f != -1) {
1055                 extern int module_id;
1056                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1057         }
1058
1059         if (f != -1) {
1060                 io_end_buffering();
1061                 stats.flist_size = stats.total_written - start_write;
1062                 stats.num_files = flist->count;
1063                 if (write_batch)
1064                         write_batch_flist_info(flist->count, flist->files);
1065         }
1066
1067         if (verbose > 2)
1068                 rprintf(FINFO, "send_file_list done\n");
1069
1070         return flist;
1071 }
1072
1073
1074 struct file_list *recv_file_list(int f)
1075 {
1076         struct file_list *flist;
1077         unsigned char flags;
1078         int64 start_read;
1079         extern int list_only;
1080
1081         if (show_filelist_p())
1082                 start_filelist_progress("receiving file list");
1083
1084         start_read = stats.total_read;
1085
1086         flist = new(struct file_list);
1087         if (!flist)
1088                 goto oom;
1089
1090         flist->count = 0;
1091         flist->malloced = 1000;
1092         flist->files = new_array(struct file_struct *, flist->malloced);
1093         if (!flist->files)
1094                 goto oom;
1095
1096
1097         for (flags = read_byte(f); flags; flags = read_byte(f)) {
1098                 int i = flist->count;
1099
1100                 flist_expand(flist);
1101
1102                 receive_file_entry(&flist->files[i], flags, f);
1103
1104                 if (S_ISREG(flist->files[i]->mode))
1105                         stats.total_size += flist->files[i]->length;
1106
1107                 flist->count++;
1108
1109                 maybe_emit_filelist_progress(flist);
1110
1111                 if (verbose > 2) {
1112                         rprintf(FINFO, "recv_file_name(%s)\n",
1113                                 f_name(flist->files[i]));
1114                 }
1115         }
1116
1117
1118         if (verbose > 2)
1119                 rprintf(FINFO, "received %d names\n", flist->count);
1120
1121         clean_flist(flist, relative_paths, 1);
1122
1123         if (show_filelist_p())
1124                 finish_filelist_progress(flist);
1125
1126         /* now recv the uid/gid list. This was introduced in protocol version 15 */
1127         if (f != -1)
1128                 recv_uid_list(f, flist);
1129
1130         /* recv the io_error flag */
1131         if (f != -1 && !read_batch) {   /* dw-added readbatch */
1132                 extern int module_id;
1133                 extern int ignore_errors;
1134                 if (lp_ignore_errors(module_id) || ignore_errors)
1135                         read_int(f);
1136                 else
1137                         io_error |= read_int(f);
1138         }
1139
1140         if (list_only) {
1141                 int i;
1142                 for (i = 0; i < flist->count; i++)
1143                         list_file_entry(flist->files[i]);
1144         }
1145
1146
1147         if (verbose > 2)
1148                 rprintf(FINFO, "recv_file_list done\n");
1149
1150         stats.flist_size = stats.total_read - start_read;
1151         stats.num_files = flist->count;
1152
1153         return flist;
1154
1155       oom:
1156         out_of_memory("recv_file_list");
1157         return NULL;            /* not reached */
1158 }
1159
1160
1161 int file_compare(struct file_struct **f1, struct file_struct **f2)
1162 {
1163         if (!(*f1)->basename && !(*f2)->basename)
1164                 return 0;
1165         if (!(*f1)->basename)
1166                 return -1;
1167         if (!(*f2)->basename)
1168                 return 1;
1169         if ((*f1)->dirname == (*f2)->dirname)
1170                 return u_strcmp((*f1)->basename, (*f2)->basename);
1171         return f_name_cmp(*f1, *f2);
1172 }
1173
1174
1175 int flist_find(struct file_list *flist, struct file_struct *f)
1176 {
1177         int low = 0, high = flist->count - 1;
1178
1179         while (high >= 0 && !flist->files[high]->basename) high--;
1180
1181         if (high < 0)
1182                 return -1;
1183
1184         while (low != high) {
1185                 int mid = (low + high) / 2;
1186                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1187                 if (ret == 0)
1188                         return flist_up(flist, mid);
1189                 if (ret > 0)
1190                         high = mid;
1191                 else
1192                         low = mid + 1;
1193         }
1194
1195         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1196                 return flist_up(flist, low);
1197         return -1;
1198 }
1199
1200
1201 /*
1202  * free up one file
1203  */
1204 void free_file(struct file_struct *file)
1205 {
1206         if (!file)
1207                 return;
1208         if (file->basename)
1209                 free(file->basename);
1210         if (file->link)
1211                 free(file->link);
1212         if (file->sum)
1213                 free(file->sum);
1214         *file = null_file;
1215 }
1216
1217
1218 /*
1219  * allocate a new file list
1220  */
1221 struct file_list *flist_new(void)
1222 {
1223         struct file_list *flist;
1224
1225         flist = new(struct file_list);
1226         if (!flist)
1227                 out_of_memory("send_file_list");
1228
1229         flist->count = 0;
1230         flist->malloced = 0;
1231         flist->files = NULL;
1232
1233 #if ARENA_SIZE > 0
1234         flist->string_area = string_area_new(0);
1235 #else
1236         flist->string_area = NULL;
1237 #endif
1238         return flist;
1239 }
1240
1241 /*
1242  * free up all elements in a flist
1243  */
1244 void flist_free(struct file_list *flist)
1245 {
1246         int i;
1247         for (i = 1; i < flist->count; i++) {
1248                 if (!flist->string_area)
1249                         free_file(flist->files[i]);
1250                 free(flist->files[i]);
1251         }
1252         /* FIXME: I don't think we generally need to blank the flist
1253          * since it's about to be freed.  This will just cause more
1254          * memory traffic.  If you want a freed-memory debugger, you
1255          * know where to get it. */
1256         memset((char *) flist->files, 0,
1257                sizeof(flist->files[0]) * flist->count);
1258         free(flist->files);
1259         if (flist->string_area)
1260                 string_area_free(flist->string_area);
1261         memset((char *) flist, 0, sizeof(*flist));
1262         free(flist);
1263 }
1264
1265
1266 /*
1267  * This routine ensures we don't have any duplicate names in our file list.
1268  * duplicate names can cause corruption because of the pipelining
1269  */
1270 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1271 {
1272         int i, prev_i = 0;
1273
1274         if (!flist || flist->count == 0)
1275                 return;
1276
1277         qsort(flist->files, flist->count,
1278               sizeof(flist->files[0]), (int (*)()) file_compare);
1279
1280         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1281                 if (flist->files[i]->basename) {
1282                         prev_i = i;
1283                         break;
1284                 }
1285         }
1286         while (++i < flist->count) {
1287                 if (!flist->files[i]->basename)
1288                         continue;
1289                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1290                         if (verbose > 1 && !am_server) {
1291                                 rprintf(FINFO,
1292                                         "removing duplicate name %s from file list %d\n",
1293                                         f_name(flist->files[i]), i);
1294                         }
1295                         /* Make sure that if we unduplicate '.', that we don't
1296                          * lose track of a user-specified starting point (or
1297                          * else deletions will mysteriously fail with -R). */
1298                         if (flist->files[i]->flags & FLAG_DELETE)
1299                                 flist->files[prev_i]->flags |= FLAG_DELETE;
1300                         /* it's not great that the flist knows the semantics of
1301                          * the file memory usage, but i'd rather not add a flag
1302                          * byte to that struct.
1303                          * XXX can i use a bit in the flags field? */
1304                         if (flist->string_area)
1305                                 flist->files[i][0] = null_file;
1306                         else
1307                                 free_file(flist->files[i]);
1308                 }
1309                 else
1310                         prev_i = i;
1311         }
1312
1313         if (strip_root) {
1314                 /* we need to strip off the root directory in the case
1315                    of relative paths, but this must be done _after_
1316                    the sorting phase */
1317                 for (i = 0; i < flist->count; i++) {
1318                         if (flist->files[i]->dirname &&
1319                             flist->files[i]->dirname[0] == '/') {
1320                                 memmove(&flist->files[i]->dirname[0],
1321                                         &flist->files[i]->dirname[1],
1322                                         strlen(flist->files[i]->dirname));
1323                         }
1324
1325                         if (flist->files[i]->dirname &&
1326                             !flist->files[i]->dirname[0]) {
1327                                 flist->files[i]->dirname = NULL;
1328                         }
1329                 }
1330         }
1331
1332         if (verbose <= 3)
1333                 return;
1334
1335         for (i = 0; i < flist->count; i++) {
1336                 rprintf(FINFO, "[%d] i=%d %s %s mode=0%o len=%.0f\n",
1337                         (int) getpid(), i,
1338                         NS(flist->files[i]->dirname),
1339                         NS(flist->files[i]->basename),
1340                         (int) flist->files[i]->mode,
1341                         (double) flist->files[i]->length);
1342         }
1343 }
1344
1345
1346 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1347
1348 /* Compare the names of two file_struct entities, just like strcmp()
1349  * would do if it were operating on the joined strings.  We assume
1350  * that there are no 0-length strings.
1351  */
1352 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1353 {
1354         int dif;
1355         const uchar *c1, *c2;
1356         enum fnc_state state1 = fnc_DIR, state2 = fnc_DIR;
1357
1358         if (!f1 || !f1->basename) {
1359                 if (!f2 || !f2->basename)
1360                         return 0;
1361                 return -1;
1362         }
1363         if (!f2 || !f2->basename)
1364                 return 1;
1365
1366         if (!(c1 = (uchar*)f1->dirname)) {
1367                 state1 = fnc_BASE;
1368                 c1 = (uchar*)f1->basename;
1369         }
1370         if (!(c2 = (uchar*)f2->dirname)) {
1371                 state2 = fnc_BASE;
1372                 c2 = (uchar*)f2->basename;
1373         }
1374
1375         while (1) {
1376                 if ((dif = (int)*c1 - (int)*c2) != 0)
1377                         break;
1378                 if (!*++c1) {
1379                         switch (state1) {
1380                         case fnc_DIR:
1381                                 state1 = fnc_SLASH;
1382                                 c1 = (uchar*)"/";
1383                                 break;
1384                         case fnc_SLASH:
1385                                 state1 = fnc_BASE;
1386                                 c1 = (uchar*)f1->basename;
1387                                 break;
1388                         case fnc_BASE:
1389                                 break;
1390                         }
1391                 }
1392                 if (!*++c2) {
1393                         switch (state2) {
1394                         case fnc_DIR:
1395                                 state2 = fnc_SLASH;
1396                                 c2 = (uchar*)"/";
1397                                 break;
1398                         case fnc_SLASH:
1399                                 state2 = fnc_BASE;
1400                                 c2 = (uchar*)f2->basename;
1401                                 break;
1402                         case fnc_BASE:
1403                                 if (!*c1)
1404                                         return 0;
1405                                 break;
1406                         }
1407                 }
1408         }
1409
1410         return dif;
1411 }
1412
1413
1414 /* Return a copy of the full filename of a flist entry, using the indicated
1415  * buffer.
1416  */
1417 char *f_name_to(struct file_struct *f, char *fbuf, int bsize)
1418 {
1419         if (!f || !f->basename)
1420                 return NULL;
1421
1422         if (f->dirname) {
1423                 int off = strlcpy(fbuf, f->dirname, bsize);
1424                 off += strlcpy(fbuf + off, "/", bsize - off);
1425                 strlcpy(fbuf + off, f->basename, bsize - off);
1426         } else
1427                 strlcpy(fbuf, f->basename, bsize);
1428         return fbuf;
1429 }
1430
1431
1432 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1433  */
1434 char *f_name(struct file_struct *f)
1435 {
1436         static char names[5][MAXPATHLEN];
1437         static unsigned int n;
1438
1439         n = (n + 1) % (sizeof names / sizeof names[0]);
1440
1441         return f_name_to(f, names[n], sizeof names[0]);
1442 }