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 short base_flags)
 356 {
 357         unsigned short flags;
 358         static time_t modtime;
 359         static mode_t mode;
 360         static DEV64_T last_rdev;
 361         static uid_t uid;
 362         static gid_t gid;
 363         static DEV64_T dev;
 364         static char lastname[MAXPATHLEN];
 365         char *fname, fbuf[MAXPATHLEN];
 366         int l1, l2;
 367
 368         if (f == -1)
 369                 return;
 370
 371         if (!file) {
 372                 write_byte(f, 0);
 373                 return;
 374         }
 375
 376         io_write_phase = "send_file_entry";
 377
 378         fname = f_name_to(file, fbuf, sizeof fbuf);
 379
 380         flags = base_flags;
 381
 382         if (file->mode == mode)
 383                 flags |= SAME_MODE;
 384         else
 385                 mode = file->mode;
 386         if (preserve_devices) {
 387                 if (protocol_version < 28) {
 388                         if (IS_DEVICE(mode) && file->rdev == last_rdev) {
 389                                 /* Set both flags so that the test when
 390                                  * writing the data is simpler. */
 391                                 flags |= SAME_RDEV_pre28|SAME_HIGH_RDEV;
 392                         }
 393                         else
 394                                 last_rdev = file->rdev;
 395                 }
 396                 else if (IS_DEVICE(mode)) {
 397                         if ((file->rdev & ~0xFF) == last_rdev)
 398                                 flags |= SAME_HIGH_RDEV;
 399                         else
 400                                 last_rdev = file->rdev & ~0xFF;
 401                 }
 402         }
 403         if (file->uid == uid)
 404                 flags |= SAME_UID;
 405         else
 406                 uid = file->uid;
 407         if (file->gid == gid)
 408                 flags |= SAME_GID;
 409         else
 410                 gid = file->gid;
 411         if (file->modtime == modtime)
 412                 flags |= SAME_TIME;
 413         else
 414                 modtime = file->modtime;
 415         if (file->flags & HAS_INODE_DATA) {
 416                 if (file->dev == dev) {
 417                         if (protocol_version >= 28)
 418                                 flags |= SAME_DEV;
 419                 }
 420                 else
 421                         dev = file->dev;
 422                 flags |= HAS_INODE_DATA;
 423         }
 424
 425         for (l1 = 0;
 426              lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 427              l1++) {}
 428         l2 = strlen(fname) - l1;
 429
 430         if (l1 > 0)
 431                 flags |= SAME_NAME;
 432         if (l2 > 255)
 433                 flags |= LONG_NAME;
 434
 435         /* We must make sure we don't send a zero flags byte or
 436          * the other end will terminate the flist transfer. */
 437         if (flags == 0 && !S_ISDIR(mode))
 438                 flags |= FLAG_DELETE; /* NOTE: no meaning for non-dir */
 439         if (protocol_version >= 28) {
 440                 if ((flags & 0xFF00) || flags == 0) {
 441                         flags |= EXTENDED_FLAGS;
 442                         write_byte(f, flags);
 443                         write_byte(f, flags >> 8);
 444                 } else
 445                         write_byte(f, flags);
 446         } else {
 447                 if (flags == 0)
 448                         flags |= LONG_NAME;
 449                 write_byte(f, flags);
 450         }
 451         if (flags & SAME_NAME)
 452                 write_byte(f, l1);
 453         if (flags & LONG_NAME)
 454                 write_int(f, l2);
 455         else
 456                 write_byte(f, l2);
 457         write_buf(f, fname + l1, l2);
 458
 459         write_longint(f, file->length);
 460         if (!(flags & SAME_TIME))
 461                 write_int(f, modtime);
 462         if (!(flags & SAME_MODE))
 463                 write_int(f, to_wire_mode(mode));
 464         if (preserve_uid && !(flags & SAME_UID)) {
 465                 add_uid(uid);
 466                 write_int(f, uid);
 467         }
 468         if (preserve_gid && !(flags & SAME_GID)) {
 469                 add_gid(gid);
 470                 write_int(f, gid);
 471         }
 472         if (preserve_devices && IS_DEVICE(mode)) {
 473                 /* If SAME_HIGH_RDEV is off, SAME_RDEV_pre28 is also off. */
 474                 if (!(flags & SAME_HIGH_RDEV))
 475                         write_int(f, file->rdev);
 476                 else if (protocol_version >= 28)
 477                         write_byte(f, file->rdev);
 478         }
 479
 480 #if SUPPORT_LINKS
 481         if (preserve_links && S_ISLNK(mode)) {
 482                 write_int(f, strlen(file->link));
 483                 write_buf(f, file->link, strlen(file->link));
 484         }
 485 #endif
 486
 487 #if SUPPORT_HARD_LINKS
 488         if (flags & HAS_INODE_DATA) {
 489                 if (protocol_version < 26) {
 490                         /* 32-bit dev_t and ino_t */
 491                         write_int(f, dev);
 492                         write_int(f, file->inode);
 493                 } else {
 494                         /* 64-bit dev_t and ino_t */
 495                         if (!(flags & SAME_DEV))
 496                                 write_longint(f, dev);
 497                         write_longint(f, file->inode);
 498                 }
 499         }
 500 #endif
 501
 502         if (always_checksum) {
 503                 if (protocol_version < 21)
 504                         write_buf(f, file->sum, 2);
 505                 else
 506                         write_buf(f, file->sum, MD4_SUM_LENGTH);
 507         }
 508
 509         strlcpy(lastname, fname, MAXPATHLEN);
 510         lastname[MAXPATHLEN - 1] = 0;
 511
 512         io_write_phase = "unknown";
 513 }
 514
 515
 516
 517 static void receive_file_entry(struct file_struct **fptr,
 518                                unsigned short flags, int f)
 519 {
 520         static time_t modtime;
 521         static mode_t mode;
 522         static DEV64_T rdev;
 523         static uid_t uid;
 524         static gid_t gid;
 525         static DEV64_T dev;
 526         static char lastname[MAXPATHLEN];
 527         char thisname[MAXPATHLEN];
 528         unsigned int l1 = 0, l2 = 0;
 529         char *p;
 530         struct file_struct *file;
 531
 532         if (flags & SAME_NAME)
 533                 l1 = read_byte(f);
 534
 535         if (flags & LONG_NAME)
 536                 l2 = read_int(f);
 537         else
 538                 l2 = read_byte(f);
 539
 540         file = new(struct file_struct);
 541         if (!file)
 542                 out_of_memory("receive_file_entry");
 543         memset((char *) file, 0, sizeof(*file));
 544         (*fptr) = file;
 545
 546         if (l2 >= MAXPATHLEN - l1) {
 547                 rprintf(FERROR,
 548                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 549                         flags, l1, l2, lastname);
 550                 overflow("receive_file_entry");
 551         }
 552
 553         strlcpy(thisname, lastname, l1 + 1);
 554         read_sbuf(f, &thisname[l1], l2);
 555         thisname[l1 + l2] = 0;
 556
 557         strlcpy(lastname, thisname, MAXPATHLEN);
 558         lastname[MAXPATHLEN - 1] = 0;
 559
 560         clean_fname(thisname);
 561
 562         if (sanitize_paths) {
 563                 sanitize_path(thisname, NULL);
 564         }
 565
 566         if ((p = strrchr(thisname, '/'))) {
 567                 static char *lastdir;
 568                 *p = 0;
 569                 if (lastdir && strcmp(thisname, lastdir) == 0)
 570                         file->dirname = lastdir;
 571                 else {
 572                         file->dirname = strdup(thisname);
 573                         lastdir = file->dirname;
 574                 }
 575                 file->basename = strdup(p + 1);
 576         } else {
 577                 file->dirname = NULL;
 578                 file->basename = strdup(thisname);
 579         }
 580
 581         if (!file->basename)
 582                 out_of_memory("receive_file_entry 1");
 583
 584         file->flags = flags;
 585         file->length = read_longint(f);
 586         if (!(flags & SAME_TIME))
 587                 modtime = (time_t)read_int(f);
 588         file->modtime = modtime;
 589         if (!(flags & SAME_MODE))
 590                 mode = from_wire_mode(read_int(f));
 591         file->mode = mode;
 592
 593         if (preserve_uid) {
 594                 if (!(flags & SAME_UID))
 595                         uid = (uid_t)read_int(f);
 596                 file->uid = uid;
 597         }
 598         if (preserve_gid) {
 599                 if (!(flags & SAME_GID))
 600                         gid = (gid_t)read_int(f);
 601                 file->gid = gid;
 602         }
 603         if (preserve_devices) {
 604                 if (protocol_version < 28) {
 605                         if (IS_DEVICE(mode)) {
 606                                 if (!(flags & SAME_RDEV_pre28))
 607                                         rdev = (DEV64_T)read_int(f);
 608                                 file->rdev = rdev;
 609                         } else
 610                                 rdev = 0;
 611                 } else if (IS_DEVICE(mode)) {
 612                         if (!(flags & SAME_HIGH_RDEV)) {
 613                                 file->rdev = (DEV64_T)read_int(f);
 614                                 rdev = file->rdev & ~0xFF;
 615                         } else
 616                                 file->rdev = (DEV64_T)(rdev | read_byte(f));
 617                 }
 618         }
 619
 620         if (preserve_links && S_ISLNK(mode)) {
 621                 int l = read_int(f);
 622                 if (l < 0) {
 623                         rprintf(FERROR, "overflow: l=%d\n", l);
 624                         overflow("receive_file_entry");
 625                 }
 626                 file->link = new_array(char, l + 1);
 627                 if (!file->link)
 628                         out_of_memory("receive_file_entry 2");
 629                 read_sbuf(f, file->link, l);
 630                 if (sanitize_paths)
 631                         sanitize_path(file->link, file->dirname);
 632         }
 633 #if SUPPORT_HARD_LINKS
 634         if (preserve_hard_links && protocol_version < 28
 635             && S_ISREG(mode))
 636                 file->flags |= HAS_INODE_DATA;
 637         if (file->flags & HAS_INODE_DATA) {
 638                 if (protocol_version < 26) {
 639                         dev = read_int(f);
 640                         file->inode = read_int(f);
 641                 } else {
 642                         if (!(flags & SAME_DEV))
 643                                 dev = read_longint(f);
 644                         file->inode = read_longint(f);
 645                 }
 646                 file->dev = dev;
 647         }
 648 #endif
 649
 650         if (always_checksum) {
 651                 file->sum = new_array(char, MD4_SUM_LENGTH);
 652                 if (!file->sum)
 653                         out_of_memory("md4 sum");
 654                 if (protocol_version < 21)
 655                         read_buf(f, file->sum, 2);
 656                 else
 657                         read_buf(f, file->sum, MD4_SUM_LENGTH);
 658         }
 659
 660         if (!preserve_perms) {
 661                 extern int orig_umask;
 662                 /* set an appropriate set of permissions based on original
 663                    permissions and umask. This emulates what GNU cp does */
 664                 file->mode &= ~orig_umask;
 665         }
 666 }
 667
 668
 669 /* determine if a file in a different filesstem should be skipped
 670    when one_file_system is set. We bascally only want to include
 671    the mount points - but they can be hard to find! */
 672 static int skip_filesystem(char *fname, STRUCT_STAT * st)
 673 {
 674         STRUCT_STAT st2;
 675         char *p = strrchr(fname, '/');
 676
 677         /* skip all but directories */
 678         if (!S_ISDIR(st->st_mode))
 679                 return 1;
 680
 681         /* if its not a subdirectory then allow */
 682         if (!p)
 683                 return 0;
 684
 685         *p = 0;
 686         if (link_stat(fname, &st2)) {
 687                 *p = '/';
 688                 return 0;
 689         }
 690         *p = '/';
 691
 692         return (st2.st_dev != filesystem_dev);
 693 }
 694
 695 #define STRDUP(ap, p)   (ap ? string_area_strdup(ap, p) : strdup(p))
 696 /* IRIX cc cares that the operands to the ternary have the same type. */
 697 #define MALLOC(ap, i)   (ap ? (void*) string_area_malloc(ap, i) : malloc(i))
 698
 699 /**
 700  * Create a file_struct for a named file by reading its stat()
 701  * information and performing extensive checks against global
 702  * options.
 703  *
 704  * @return the new file, or NULL if there was an error or this file
 705  * should be excluded.
 706  *
 707  * @todo There is a small optimization opportunity here to avoid
 708  * stat()ing the file in some circumstances, which has a certain cost.
 709  * We are called immediately after doing readdir(), and so we may
 710  * already know the d_type of the file.  We could for example avoid
 711  * statting directories if we're not recursing, but this is not a very
 712  * important case.  Some systems may not have d_type.
 713  **/
 714 struct file_struct *make_file(char *fname, struct string_area **ap,
 715                               int exclude_level)
 716 {
 717         struct file_struct *file;
 718         STRUCT_STAT st;
 719         char sum[SUM_LENGTH];
 720         char *p;
 721         char cleaned_name[MAXPATHLEN];
 722         char linkbuf[MAXPATHLEN];
 723         extern int module_id;
 724
 725         strlcpy(cleaned_name, fname, MAXPATHLEN);
 726         cleaned_name[MAXPATHLEN - 1] = 0;
 727         clean_fname(cleaned_name);
 728         if (sanitize_paths)
 729                 sanitize_path(cleaned_name, NULL);
 730         fname = cleaned_name;
 731
 732         memset(sum, 0, SUM_LENGTH);
 733
 734         if (readlink_stat(fname, &st, linkbuf) != 0) {
 735                 int save_errno = errno;
 736                 if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
 737                         /* either symlink pointing nowhere or file that
 738                          * was removed during rsync run; see if excluded
 739                          * before reporting an error */
 740                         if (check_exclude_file(fname, 0, exclude_level)) {
 741                                 /* file is excluded anyway, ignore silently */
 742                                 return NULL;
 743                         }
 744                 }
 745                 io_error |= IOERR_GENERAL;
 746                 rprintf(FERROR, "readlink %s failed: %s\n",
 747                         full_fname(fname), strerror(save_errno));
 748                 return NULL;
 749         }
 750
 751         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 752         if (exclude_level == NO_EXCLUDES)
 753                 goto skip_excludes;
 754
 755         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 756                 rprintf(FINFO, "skipping directory %s\n", fname);
 757                 return NULL;
 758         }
 759
 760         if (one_file_system && st.st_dev != filesystem_dev) {
 761                 if (skip_filesystem(fname, &st))
 762                         return NULL;
 763         }
 764
 765         if (check_exclude_file(fname, S_ISDIR(st.st_mode) != 0, exclude_level))
 766                 return NULL;
 767
 768         if (lp_ignore_nonreadable(module_id) && access(fname, R_OK) != 0)
 769                 return NULL;
 770
 771       skip_excludes:
 772
 773         if (verbose > 2)
 774                 rprintf(FINFO, "make_file(%s,*,%d)\n", fname, exclude_level);
 775
 776         file = new(struct file_struct);
 777         if (!file)
 778                 out_of_memory("make_file");
 779         memset((char *) file, 0, sizeof(*file));
 780
 781         if ((p = strrchr(fname, '/'))) {
 782                 static char *lastdir;
 783                 *p = 0;
 784                 if (lastdir && strcmp(fname, lastdir) == 0)
 785                         file->dirname = lastdir;
 786                 else {
 787                         file->dirname = strdup(fname);
 788                         lastdir = file->dirname;
 789                 }
 790                 file->basename = STRDUP(ap, p + 1);
 791                 *p = '/';
 792         } else {
 793                 file->dirname = NULL;
 794                 file->basename = STRDUP(ap, fname);
 795         }
 796
 797         file->modtime = st.st_mtime;
 798         file->length = st.st_size;
 799         file->mode = st.st_mode;
 800         file->uid = st.st_uid;
 801         file->gid = st.st_gid;
 802         if (preserve_hard_links) {
 803                 if (protocol_version < 28? S_ISREG(st.st_mode)
 804                     : !S_ISDIR(st.st_mode) && st.st_nlink > 1) {
 805                         file->dev = st.st_dev;
 806                         file->inode = st.st_ino;
 807                         file->flags |= HAS_INODE_DATA;
 808                 }
 809         }
 810 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 811         file->rdev = st.st_rdev;
 812 #endif
 813
 814 #if SUPPORT_LINKS
 815         if (S_ISLNK(st.st_mode))
 816                 file->link = STRDUP(ap, linkbuf);
 817 #endif
 818
 819         if (always_checksum) {
 820                 file->sum = (char *) MALLOC(ap, MD4_SUM_LENGTH);
 821                 if (!file->sum)
 822                         out_of_memory("md4 sum");
 823                 /* drat. we have to provide a null checksum for non-regular
 824                    files in order to be compatible with earlier versions
 825                    of rsync */
 826                 if (S_ISREG(st.st_mode)) {
 827                         file_checksum(fname, file->sum, st.st_size);
 828                 } else {
 829                         memset(file->sum, 0, MD4_SUM_LENGTH);
 830                 }
 831         }
 832
 833         if (flist_dir) {
 834                 static char *lastdir;
 835                 if (lastdir && strcmp(lastdir, flist_dir) == 0)
 836                         file->basedir = lastdir;
 837                 else {
 838                         file->basedir = strdup(flist_dir);
 839                         lastdir = file->basedir;
 840                 }
 841         } else
 842                 file->basedir = NULL;
 843
 844         if (!S_ISDIR(st.st_mode))
 845                 stats.total_size += st.st_size;
 846
 847         return file;
 848 }
 849
 850
 851 void send_file_name(int f, struct file_list *flist, char *fname,
 852                     int recursive, unsigned short base_flags)
 853 {
 854         struct file_struct *file;
 855         char fbuf[MAXPATHLEN];
 856         extern int delete_excluded;
 857
 858         /* f is set to -1 when calculating deletion file list */
 859         file = make_file(fname, &flist->string_area,
 860                          f == -1 && delete_excluded? SERVER_EXCLUDES
 861                                                    : ALL_EXCLUDES);
 862
 863         if (!file)
 864                 return;
 865
 866         maybe_emit_filelist_progress(flist);
 867
 868         flist_expand(flist);
 869
 870         if (write_batch)
 871                 file->flags |= FLAG_DELETE;
 872
 873         if (file->basename[0]) {
 874                 flist->files[flist->count++] = file;
 875                 send_file_entry(file, f, base_flags);
 876         }
 877
 878         if (S_ISDIR(file->mode) && recursive) {
 879                 struct exclude_struct **last_exclude_list =
 880                     local_exclude_list;
 881                 send_directory(f, flist, f_name_to(file, fbuf, sizeof fbuf));
 882                 local_exclude_list = last_exclude_list;
 883                 return;
 884         }
 885 }
 886
 887
 888 static void send_directory(int f, struct file_list *flist, char *dir)
 889 {
 890         DIR *d;
 891         struct dirent *di;
 892         char fname[MAXPATHLEN];
 893         int l;
 894         char *p;
 895
 896         d = opendir(dir);
 897         if (!d) {
 898                 io_error |= IOERR_GENERAL;
 899                 rprintf(FERROR, "opendir %s failed: %s\n",
 900                         full_fname(dir), strerror(errno));
 901                 return;
 902         }
 903
 904         strlcpy(fname, dir, MAXPATHLEN);
 905         l = strlen(fname);
 906         if (fname[l - 1] != '/') {
 907                 if (l == MAXPATHLEN - 1) {
 908                         io_error |= IOERR_GENERAL;
 909                         rprintf(FERROR, "skipping long-named directory: %s\n",
 910                                 full_fname(fname));
 911                         closedir(d);
 912                         return;
 913                 }
 914                 strlcat(fname, "/", MAXPATHLEN);
 915                 l++;
 916         }
 917         p = fname + strlen(fname);
 918
 919         local_exclude_list = NULL;
 920
 921         if (cvs_exclude) {
 922                 if (strlen(fname) + strlen(".cvsignore") <= MAXPATHLEN - 1) {
 923                         strcpy(p, ".cvsignore");
 924                         add_exclude_file(&exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 925                 } else {
 926                         io_error |= IOERR_GENERAL;
 927                         rprintf(FINFO,
 928                                 "cannot cvs-exclude in long-named directory %s\n",
 929                                 full_fname(fname));
 930                 }
 931         }
 932
 933         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 934                 char *dname = d_name(di);
 935                 if (dname[0] == '.' && (dname[1] == '\0'
 936                     || (dname[1] == '.' && dname[2] == '\0')))
 937                         continue;
 938                 strlcpy(p, dname, MAXPATHLEN - l);
 939                 send_file_name(f, flist, fname, recurse, 0);
 940         }
 941         if (errno) {
 942                 io_error |= IOERR_GENERAL;
 943                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
 944                     dir, errno, strerror(errno));
 945         }
 946
 947         if (local_exclude_list)
 948                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
 949
 950         closedir(d);
 951 }
 952
 953
 954 /**
 955  * The delete_files() function in receiver.c sets f to -1 so that we just
 956  * construct the file list in memory without sending it over the wire.  It
 957  * also has the side-effect of ignoring user-excludes if delete_excluded
 958  * is set (so that the delete list includes user-excluded files).
 959  **/
 960 struct file_list *send_file_list(int f, int argc, char *argv[])
 961 {
 962         int l;
 963         STRUCT_STAT st;
 964         char *p, *dir, *olddir;
 965         char lastpath[MAXPATHLEN] = "";
 966         struct file_list *flist;
 967         int64 start_write;
 968         int use_ff_fd = 0;
 969
 970         if (show_filelist_p() && f != -1)
 971                 start_filelist_progress("building file list");
 972
 973         start_write = stats.total_written;
 974
 975         flist = flist_new();
 976
 977         if (f != -1) {
 978                 io_start_buffering_out(f);
 979                 if (filesfrom_fd >= 0) {
 980                         if (argv[0] && !push_dir(argv[0], 0)) {
 981                                 rprintf(FERROR, "push_dir %s failed: %s\n",
 982                                         full_fname(argv[0]), strerror(errno));
 983                                 exit_cleanup(RERR_FILESELECT);
 984                         }
 985                         use_ff_fd = 1;
 986                 }
 987         }
 988
 989         while (1) {
 990                 char fname2[MAXPATHLEN];
 991                 char *fname = fname2;
 992
 993                 if (use_ff_fd) {
 994                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
 995                                 break;
 996                         sanitize_path(fname, NULL);
 997                 } else {
 998                         if (argc-- == 0)
 999                                 break;
1000                         strlcpy(fname, *argv++, MAXPATHLEN);
1001                         if (sanitize_paths)
1002                                 sanitize_path(fname, NULL);
1003                 }
1004
1005                 l = strlen(fname);
1006                 if (fname[l - 1] == '/') {
1007                         if (l == 2 && fname[0] == '.') {
1008                                 /* Turn "./" into just "." rather than "./." */
1009                                 fname[1] = '\0';
1010                         } else {
1011                                 strlcat(fname, ".", MAXPATHLEN);
1012                         }
1013                 }
1014
1015                 if (link_stat(fname, &st) != 0) {
1016                         if (f != -1) {
1017                                 io_error |= IOERR_GENERAL;
1018                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1019                                         full_fname(fname), strerror(errno));
1020                         }
1021                         continue;
1022                 }
1023
1024                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1025                         rprintf(FINFO, "skipping directory %s\n", fname);
1026                         continue;
1027                 }
1028
1029                 dir = NULL;
1030                 olddir = NULL;
1031
1032                 if (!relative_paths) {
1033                         p = strrchr(fname, '/');
1034                         if (p) {
1035                                 *p = 0;
1036                                 if (p == fname)
1037                                         dir = "/";
1038                                 else
1039                                         dir = fname;
1040                                 fname = p + 1;
1041                         }
1042                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1043                         /* this ensures we send the intermediate directories,
1044                            thus getting their permissions right */
1045                         char *lp = lastpath, *fn = fname, *slash = fname;
1046                         *p = 0;
1047                         /* Skip any initial directories in our path that we
1048                          * have in common with lastpath. */
1049                         while (*fn && *lp == *fn) {
1050                                 if (*fn == '/')
1051                                         slash = fn;
1052                                 lp++, fn++;
1053                         }
1054                         *p = '/';
1055                         if (fn != p || (*lp && *lp != '/')) {
1056                                 int copy_links_saved = copy_links;
1057                                 int recurse_saved = recurse;
1058                                 copy_links = copy_unsafe_links;
1059                                 /* set recurse to 1 to prevent make_file
1060                                  * from ignoring directory, but still
1061                                  * turn off the recursive parameter to
1062                                  * send_file_name */
1063                                 recurse = 1;
1064                                 while ((slash = strchr(slash+1, '/')) != 0) {
1065                                         *slash = 0;
1066                                         send_file_name(f, flist, fname, 0, 0);
1067                                         *slash = '/';
1068                                 }
1069                                 copy_links = copy_links_saved;
1070                                 recurse = recurse_saved;
1071                                 *p = 0;
1072                                 strlcpy(lastpath, fname, sizeof lastpath);
1073                                 *p = '/';
1074                         }
1075                 }
1076
1077                 if (!*fname)
1078                         fname = ".";
1079
1080                 if (dir && *dir) {
1081                         olddir = push_dir(dir, 1);
1082
1083                         if (!olddir) {
1084                                 io_error |= IOERR_GENERAL;
1085                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1086                                         full_fname(dir), strerror(errno));
1087                                 continue;
1088                         }
1089
1090                         flist_dir = dir;
1091                 }
1092
1093                 if (one_file_system)
1094                         set_filesystem(fname);
1095
1096                 send_file_name(f, flist, fname, recurse, FLAG_DELETE);
1097
1098                 if (olddir != NULL) {
1099                         flist_dir = NULL;
1100                         if (pop_dir(olddir) != 0) {
1101                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1102                                         full_fname(dir), strerror(errno));
1103                                 exit_cleanup(RERR_FILESELECT);
1104                         }
1105                 }
1106         }
1107
1108         if (f != -1)
1109                 send_file_entry(NULL, f, 0);
1110
1111         if (show_filelist_p() && f != -1)
1112                 finish_filelist_progress(flist);
1113
1114         clean_flist(flist, 0, 0);
1115
1116         /* now send the uid/gid list. This was introduced in protocol
1117            version 15 */
1118         if (f != -1)
1119                 send_uid_list(f);
1120
1121         /* send the io_error flag */
1122         if (f != -1) {
1123                 extern int module_id;
1124                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1125         }
1126
1127         if (f != -1) {
1128                 io_end_buffering();
1129                 stats.flist_size = stats.total_written - start_write;
1130                 stats.num_files = flist->count;
1131                 if (write_batch)
1132                         write_batch_flist_info(flist->count, flist->files);
1133         }
1134
1135         if (verbose > 2)
1136                 rprintf(FINFO, "send_file_list done\n");
1137
1138         return flist;
1139 }
1140
1141
1142 struct file_list *recv_file_list(int f)
1143 {
1144         struct file_list *flist;
1145         unsigned short flags;
1146         int64 start_read;
1147         extern int list_only;
1148
1149         if (show_filelist_p())
1150                 start_filelist_progress("receiving file list");
1151
1152         start_read = stats.total_read;
1153
1154         flist = new(struct file_list);
1155         if (!flist)
1156                 goto oom;
1157
1158         flist->count = 0;
1159         flist->malloced = 1000;
1160         flist->files = new_array(struct file_struct *, flist->malloced);
1161         if (!flist->files)
1162                 goto oom;
1163
1164
1165         while ((flags = read_byte(f)) != 0) {
1166                 int i = flist->count;
1167
1168                 flist_expand(flist);
1169
1170                 if (protocol_version >= 28 && (flags & EXTENDED_FLAGS))
1171                         flags |= read_byte(f) << 8;
1172                 receive_file_entry(&flist->files[i], flags, f);
1173
1174                 if (S_ISREG(flist->files[i]->mode))
1175                         stats.total_size += flist->files[i]->length;
1176
1177                 flist->count++;
1178
1179                 maybe_emit_filelist_progress(flist);
1180
1181                 if (verbose > 2) {
1182                         rprintf(FINFO, "recv_file_name(%s)\n",
1183                                 f_name(flist->files[i]));
1184                 }
1185         }
1186
1187
1188         if (verbose > 2)
1189                 rprintf(FINFO, "received %d names\n", flist->count);
1190
1191         clean_flist(flist, relative_paths, 1);
1192
1193         if (show_filelist_p())
1194                 finish_filelist_progress(flist);
1195
1196         /* now recv the uid/gid list. This was introduced in protocol version 15 */
1197         if (f != -1)
1198                 recv_uid_list(f, flist);
1199
1200         /* recv the io_error flag */
1201         if (f != -1 && !read_batch) {   /* dw-added readbatch */
1202                 extern int module_id;
1203                 extern int ignore_errors;
1204                 if (lp_ignore_errors(module_id) || ignore_errors)
1205                         read_int(f);
1206                 else
1207                         io_error |= read_int(f);
1208         }
1209
1210         if (list_only) {
1211                 int i;
1212                 for (i = 0; i < flist->count; i++)
1213                         list_file_entry(flist->files[i]);
1214         }
1215
1216
1217         if (verbose > 2)
1218                 rprintf(FINFO, "recv_file_list done\n");
1219
1220         stats.flist_size = stats.total_read - start_read;
1221         stats.num_files = flist->count;
1222
1223         return flist;
1224
1225       oom:
1226         out_of_memory("recv_file_list");
1227         return NULL;            /* not reached */
1228 }
1229
1230
1231 int file_compare(struct file_struct **file1, struct file_struct **file2)
1232 {
1233         struct file_struct *f1 = *file1;
1234         struct file_struct *f2 = *file2;
1235
1236         if (!f1->basename && !f2->basename)
1237                 return 0;
1238         if (!f1->basename)
1239                 return -1;
1240         if (!f2->basename)
1241                 return 1;
1242         if (f1->dirname == f2->dirname)
1243                 return u_strcmp(f1->basename, f2->basename);
1244         return f_name_cmp(f1, f2);
1245 }
1246
1247
1248 int flist_find(struct file_list *flist, struct file_struct *f)
1249 {
1250         int low = 0, high = flist->count - 1;
1251
1252         while (high >= 0 && !flist->files[high]->basename) high--;
1253
1254         if (high < 0)
1255                 return -1;
1256
1257         while (low != high) {
1258                 int mid = (low + high) / 2;
1259                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1260                 if (ret == 0)
1261                         return flist_up(flist, mid);
1262                 if (ret > 0)
1263                         high = mid;
1264                 else
1265                         low = mid + 1;
1266         }
1267
1268         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1269                 return flist_up(flist, low);
1270         return -1;
1271 }
1272
1273
1274 /*
1275  * free up one file
1276  */
1277 void free_file(struct file_struct *file)
1278 {
1279         if (!file)
1280                 return;
1281         if (file->basename)
1282                 free(file->basename);
1283         if (file->link)
1284                 free(file->link);
1285         if (file->sum)
1286                 free(file->sum);
1287         *file = null_file;
1288 }
1289
1290
1291 /*
1292  * allocate a new file list
1293  */
1294 struct file_list *flist_new(void)
1295 {
1296         struct file_list *flist;
1297
1298         flist = new(struct file_list);
1299         if (!flist)
1300                 out_of_memory("send_file_list");
1301
1302         flist->count = 0;
1303         flist->malloced = 0;
1304         flist->files = NULL;
1305
1306 #if ARENA_SIZE > 0
1307         flist->string_area = string_area_new(0);
1308 #else
1309         flist->string_area = NULL;
1310 #endif
1311         return flist;
1312 }
1313
1314 /*
1315  * free up all elements in a flist
1316  */
1317 void flist_free(struct file_list *flist)
1318 {
1319         int i;
1320         for (i = 1; i < flist->count; i++) {
1321                 if (!flist->string_area)
1322                         free_file(flist->files[i]);
1323                 free(flist->files[i]);
1324         }
1325         /* FIXME: I don't think we generally need to blank the flist
1326          * since it's about to be freed.  This will just cause more
1327          * memory traffic.  If you want a freed-memory debugger, you
1328          * know where to get it. */
1329         memset((char *) flist->files, 0,
1330                sizeof(flist->files[0]) * flist->count);
1331         free(flist->files);
1332         if (flist->string_area)
1333                 string_area_free(flist->string_area);
1334         memset((char *) flist, 0, sizeof(*flist));
1335         free(flist);
1336 }
1337
1338
1339 /*
1340  * This routine ensures we don't have any duplicate names in our file list.
1341  * duplicate names can cause corruption because of the pipelining
1342  */
1343 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1344 {
1345         int i, prev_i = 0;
1346
1347         if (!flist || flist->count == 0)
1348                 return;
1349
1350         qsort(flist->files, flist->count,
1351               sizeof(flist->files[0]), (int (*)()) file_compare);
1352
1353         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1354                 if (flist->files[i]->basename) {
1355                         prev_i = i;
1356                         break;
1357                 }
1358         }
1359         while (++i < flist->count) {
1360                 if (!flist->files[i]->basename)
1361                         continue;
1362                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1363                         if (verbose > 1 && !am_server) {
1364                                 rprintf(FINFO,
1365                                         "removing duplicate name %s from file list %d\n",
1366                                         f_name(flist->files[i]), i);
1367                         }
1368                         /* Make sure that if we unduplicate '.', that we don't
1369                          * lose track of a user-specified starting point (or
1370                          * else deletions will mysteriously fail with -R). */
1371                         if (flist->files[i]->flags & FLAG_DELETE)
1372                                 flist->files[prev_i]->flags |= FLAG_DELETE;
1373                         /* it's not great that the flist knows the semantics of
1374                          * the file memory usage, but i'd rather not add a flag
1375                          * byte to that struct.
1376                          * XXX can i use a bit in the flags field? */
1377                         if (flist->string_area)
1378                                 flist->files[i][0] = null_file;
1379                         else
1380                                 free_file(flist->files[i]);
1381                 }
1382                 else
1383                         prev_i = i;
1384         }
1385
1386         if (strip_root) {
1387                 /* we need to strip off the root directory in the case
1388                    of relative paths, but this must be done _after_
1389                    the sorting phase */
1390                 for (i = 0; i < flist->count; i++) {
1391                         if (flist->files[i]->dirname &&
1392                             flist->files[i]->dirname[0] == '/') {
1393                                 memmove(&flist->files[i]->dirname[0],
1394                                         &flist->files[i]->dirname[1],
1395                                         strlen(flist->files[i]->dirname));
1396                         }
1397
1398                         if (flist->files[i]->dirname &&
1399                             !flist->files[i]->dirname[0]) {
1400                                 flist->files[i]->dirname = NULL;
1401                         }
1402                 }
1403         }
1404
1405         if (verbose <= 3)
1406                 return;
1407
1408         for (i = 0; i < flist->count; i++) {
1409                 rprintf(FINFO, "[%ld] i=%d %s %s mode=0%o len=%.0f\n",
1410                         (long) getpid(), i,
1411                         NS(flist->files[i]->dirname),
1412                         NS(flist->files[i]->basename),
1413                         (int) flist->files[i]->mode,
1414                         (double) flist->files[i]->length);
1415         }
1416 }
1417
1418
1419 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1420
1421 /* Compare the names of two file_struct entities, just like strcmp()
1422  * would do if it were operating on the joined strings.  We assume
1423  * that there are no 0-length strings.
1424  */
1425 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1426 {
1427         int dif;
1428         const uchar *c1, *c2;
1429         enum fnc_state state1, state2;
1430
1431         if (!f1 || !f1->basename) {
1432                 if (!f2 || !f2->basename)
1433                         return 0;
1434                 return -1;
1435         }
1436         if (!f2 || !f2->basename)
1437                 return 1;
1438
1439         if (!(c1 = (uchar*)f1->dirname)) {
1440                 state1 = fnc_BASE;
1441                 c1 = (uchar*)f1->basename;
1442         }
1443         else
1444                 state1 = fnc_DIR;
1445         if (!(c2 = (uchar*)f2->dirname)) {
1446                 state2 = fnc_BASE;
1447                 c2 = (uchar*)f2->basename;
1448         }
1449         else
1450                 state2 = fnc_DIR;
1451
1452         while (1) {
1453                 if ((dif = (int)*c1 - (int)*c2) != 0)
1454                         break;
1455                 if (!*++c1) {
1456                         switch (state1) {
1457                         case fnc_DIR:
1458                                 state1 = fnc_SLASH;
1459                                 c1 = (uchar*)"/";
1460                                 break;
1461                         case fnc_SLASH:
1462                                 state1 = fnc_BASE;
1463                                 c1 = (uchar*)f1->basename;
1464                                 break;
1465                         case fnc_BASE:
1466                                 break;
1467                         }
1468                 }
1469                 if (!*++c2) {
1470                         switch (state2) {
1471                         case fnc_DIR:
1472                                 state2 = fnc_SLASH;
1473                                 c2 = (uchar*)"/";
1474                                 break;
1475                         case fnc_SLASH:
1476                                 state2 = fnc_BASE;
1477                                 c2 = (uchar*)f2->basename;
1478                                 break;
1479                         case fnc_BASE:
1480                                 if (!*c1)
1481                                         return 0;
1482                                 break;
1483                         }
1484                 }
1485         }
1486
1487         return dif;
1488 }
1489
1490
1491 /* Return a copy of the full filename of a flist entry, using the indicated
1492  * buffer.
1493  */
1494 char *f_name_to(struct file_struct *f, char *fbuf, int bsize)
1495 {
1496         if (!f || !f->basename)
1497                 return NULL;
1498
1499         if (f->dirname) {
1500                 int off = strlcpy(fbuf, f->dirname, bsize);
1501                 off += strlcpy(fbuf + off, "/", bsize - off);
1502                 strlcpy(fbuf + off, f->basename, bsize - off);
1503         } else
1504                 strlcpy(fbuf, f->basename, bsize);
1505         return fbuf;
1506 }
1507
1508
1509 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1510  */
1511 char *f_name(struct file_struct *f)
1512 {
1513         static char names[5][MAXPATHLEN];
1514         static unsigned int n;
1515
1516         n = (n + 1) % (sizeof names / sizeof names[0]);
1517
1518         return f_name_to(f, names[n], sizeof names[0]);
1519 }