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