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 extern int module_id;
  41 extern int ignore_errors;
  42
  43 extern int cvs_exclude;
  44
  45 extern int recurse;
  46 extern char curr_dir[MAXPATHLEN];
  47 extern char *files_from;
  48 extern int filesfrom_fd;
  49
  50 extern int one_file_system;
  51 extern int make_backups;
  52 extern int preserve_links;
  53 extern int preserve_hard_links;
  54 extern int preserve_perms;
  55 extern int preserve_devices;
  56 extern int preserve_uid;
  57 extern int preserve_gid;
  58 extern int preserve_times;
  59 extern int relative_paths;
  60 extern int implied_dirs;
  61 extern int copy_links;
  62 extern int copy_unsafe_links;
  63 extern int protocol_version;
  64 extern int sanitize_paths;
  65
  66 extern int read_batch;
  67 extern int write_batch;
  68
  69 extern struct exclude_struct **exclude_list;
  70 extern struct exclude_struct **server_exclude_list;
  71 extern struct exclude_struct **local_exclude_list;
  72
  73 int io_error;
  74
  75 static struct file_struct null_file;
  76 static char empty_sum[MD4_SUM_LENGTH];
  77
  78 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
  79
  80
  81 static int show_filelist_p(void)
  82 {
  83         return verbose && (recurse || files_from) && !am_server;
  84 }
  85
  86 static void start_filelist_progress(char *kind)
  87 {
  88         rprintf(FINFO, "%s ... ", kind);
  89         if ((verbose > 1) || do_progress)
  90                 rprintf(FINFO, "\n");
  91         rflush(FINFO);
  92 }
  93
  94
  95 static void emit_filelist_progress(const struct file_list *flist)
  96 {
  97         rprintf(FINFO, " %d files...\r", flist->count);
  98 }
  99
 100
 101 static void maybe_emit_filelist_progress(const struct file_list *flist)
 102 {
 103         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
 104                 emit_filelist_progress(flist);
 105 }
 106
 107
 108 static void finish_filelist_progress(const struct file_list *flist)
 109 {
 110         if (do_progress) {
 111                 /* This overwrites the progress line */
 112                 rprintf(FINFO, "%d file%sto consider\n",
 113                         flist->count, flist->count == 1 ? " " : "s ");
 114         } else
 115                 rprintf(FINFO, "done\n");
 116 }
 117
 118 void show_flist_stats(void)
 119 {
 120         /* Nothing yet */
 121 }
 122
 123
 124 static struct string_area *string_area_new(int size)
 125 {
 126         struct string_area *a;
 127
 128         if (size <= 0)
 129                 size = ARENA_SIZE;
 130         a = new(struct string_area);
 131         if (!a)
 132                 out_of_memory("string_area_new");
 133         a->current = a->base = new_array(char, size);
 134         if (!a->current)
 135                 out_of_memory("string_area_new buffer");
 136         a->end = a->base + size;
 137         a->next = NULL;
 138
 139         return a;
 140 }
 141
 142 static void string_area_free(struct string_area *a)
 143 {
 144         struct string_area *next;
 145
 146         for (; a; a = next) {
 147                 next = a->next;
 148                 free(a->base);
 149         }
 150 }
 151
 152 static char *string_area_malloc(struct string_area **ap, int size)
 153 {
 154         char *p;
 155         struct string_area *a;
 156
 157         /* does the request fit into the current space? */
 158         a = *ap;
 159         if (a->current + size >= a->end) {
 160                 /* no; get space, move new string_area to front of the list */
 161                 a = string_area_new(size > ARENA_SIZE ? size : ARENA_SIZE);
 162                 a->next = *ap;
 163                 *ap = a;
 164         }
 165
 166         /* have space; do the "allocation." */
 167         p = a->current;
 168         a->current += size;
 169         return p;
 170 }
 171
 172 static char *string_area_strdup(struct string_area **ap, const char *src)
 173 {
 174         char *dest = string_area_malloc(ap, strlen(src) + 1);
 175         return strcpy(dest, src);
 176 }
 177
 178 static void list_file_entry(struct file_struct *f)
 179 {
 180         char perms[11];
 181
 182         if (!f->basename)
 183                 /* this can happen if duplicate names were removed */
 184                 return;
 185
 186         permstring(perms, f->mode);
 187
 188 #if SUPPORT_LINKS
 189         if (preserve_links && S_ISLNK(f->mode)) {
 190                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
 191                         perms,
 192                         (double) f->length, timestring(f->modtime),
 193                         f_name(f), f->u.link);
 194         } else
 195 #endif
 196                 rprintf(FINFO, "%s %11.0f %s %s\n",
 197                         perms,
 198                         (double) f->length, timestring(f->modtime),
 199                         f_name(f));
 200 }
 201
 202
 203 /**
 204  * Stat either a symlink or its referent, depending on the settings of
 205  * copy_links, copy_unsafe_links, etc.
 206  *
 207  * @retval -1 on error
 208  *
 209  * @retval 0 for success
 210  *
 211  * @post If @p path is a symlink, then @p linkbuf (of size @c
 212  * MAXPATHLEN) contains the symlink target.
 213  *
 214  * @post @p buffer contains information about the link or the
 215  * referrent as appropriate, if they exist.
 216  **/
 217 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
 218 {
 219 #if SUPPORT_LINKS
 220         if (copy_links)
 221                 return do_stat(path, buffer);
 222         if (do_lstat(path, buffer) == -1)
 223                 return -1;
 224         if (S_ISLNK(buffer->st_mode)) {
 225                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
 226                 if (l == -1)
 227                         return -1;
 228                 linkbuf[l] = 0;
 229                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
 230                         if (verbose > 1) {
 231                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
 232                                         path, linkbuf);
 233                         }
 234                         return do_stat(path, buffer);
 235                 }
 236         }
 237         return 0;
 238 #else
 239         return do_stat(path, buffer);
 240 #endif
 241 }
 242
 243 int link_stat(const char *path, STRUCT_STAT * buffer)
 244 {
 245 #if SUPPORT_LINKS
 246         if (copy_links)
 247                 return do_stat(path, buffer);
 248         return do_lstat(path, buffer);
 249 #else
 250         return do_stat(path, buffer);
 251 #endif
 252 }
 253
 254 /*
 255  * This function is used to check if a file should be included/excluded
 256  * from the list of files based on its name and type etc.  The value of
 257  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
 258  */
 259 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 260 {
 261 #if 0 /* This currently never happens, so avoid a useless compare. */
 262         if (exclude_level == NO_EXCLUDES)
 263                 return 0;
 264 #endif
 265         if (fname) {
 266                 /* never exclude '.', even if somebody does --exclude '*' */
 267                 if (fname[0] == '.' && !fname[1])
 268                         return 0;
 269                 /* Handle the -R version of the '.' dir. */
 270                 if (fname[0] == '/') {
 271                         int len = strlen(fname);
 272                         if (fname[len-1] == '.' && fname[len-2] == '/')
 273                                 return 0;
 274                 }
 275         }
 276         if (server_exclude_list
 277          && check_exclude(server_exclude_list, fname, is_dir))
 278                 return 1;
 279         if (exclude_level != ALL_EXCLUDES)
 280                 return 0;
 281         if (exclude_list && check_exclude(exclude_list, fname, is_dir))
 282                 return 1;
 283         if (local_exclude_list
 284          && check_exclude(local_exclude_list, fname, is_dir))
 285                 return 1;
 286         return 0;
 287 }
 288
 289 /* used by the one_file_system code */
 290 static dev_t filesystem_dev;
 291
 292 static void set_filesystem(char *fname)
 293 {
 294         STRUCT_STAT st;
 295         if (link_stat(fname, &st) != 0)
 296                 return;
 297         filesystem_dev = st.st_dev;
 298 }
 299
 300
 301 static int to_wire_mode(mode_t mode)
 302 {
 303 #if SUPPORT_LINKS
 304         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
 305                 return (mode & ~(_S_IFMT)) | 0120000;
 306 #endif
 307         return (int) mode;
 308 }
 309
 310 static mode_t from_wire_mode(int mode)
 311 {
 312         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
 313                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
 314         return (mode_t) mode;
 315 }
 316
 317
 318 static void send_directory(int f, struct file_list *flist, char *dir);
 319
 320 static char *flist_dir;
 321 static int flist_dir_len;
 322
 323
 324 /**
 325  * Make sure @p flist is big enough to hold at least @p flist->count
 326  * entries.
 327  **/
 328 static void flist_expand(struct file_list *flist)
 329 {
 330         if (flist->count >= flist->malloced) {
 331                 void *new_ptr;
 332
 333                 if (flist->malloced < 1000)
 334                         flist->malloced += 1000;
 335                 else
 336                         flist->malloced *= 2;
 337
 338                 if (flist->files) {
 339                         new_ptr = realloc_array(flist->files,
 340                                                 struct file_struct *,
 341                                                 flist->malloced);
 342                 } else {
 343                         new_ptr = new_array(struct file_struct *,
 344                                             flist->malloced);
 345                 }
 346
 347                 if (verbose >= 2) {
 348                         rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
 349                                 who_am_i(),
 350                                 (double)sizeof(flist->files[0])
 351                                 * flist->malloced,
 352                                 (new_ptr == flist->files) ? " not" : "");
 353                 }
 354
 355                 flist->files = (struct file_struct **) new_ptr;
 356
 357                 if (!flist->files)
 358                         out_of_memory("flist_expand");
 359         }
 360 }
 361
 362 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
 363 {
 364         unsigned short flags;
 365         static time_t modtime;
 366         static mode_t mode;
 367         static DEV64_T rdev, rdev_high;
 368         static DEV64_T dev;
 369         static uid_t uid;
 370         static gid_t gid;
 371         static char lastname[MAXPATHLEN];
 372         char *fname, fbuf[MAXPATHLEN];
 373         int l1, l2;
 374
 375         if (f == -1)
 376                 return;
 377
 378         if (!file) {
 379                 write_byte(f, 0);
 380                 modtime = 0, mode = 0;
 381                 rdev = 0, rdev_high = 0, dev = 0;
 382                 uid = 0, gid = 0;
 383                 *lastname = '\0';
 384                 return;
 385         }
 386
 387         io_write_phase = "send_file_entry";
 388
 389         fname = f_name_to(file, fbuf);
 390
 391         flags = base_flags;
 392
 393         if (file->mode == mode)
 394                 flags |= XMIT_SAME_MODE;
 395         else
 396                 mode = file->mode;
 397         if (preserve_devices) {
 398                 if (protocol_version < 28) {
 399                         if (IS_DEVICE(mode)) {
 400                                 if (file->u.rdev == rdev) {
 401                                         /* Set both flags to simplify the test
 402                                          * when writing the data. */
 403                                         flags |= XMIT_SAME_RDEV_pre28
 404                                                | XMIT_SAME_HIGH_RDEV;
 405                                 } else
 406                                         rdev = file->u.rdev;
 407                         } else
 408                                 rdev = 0;
 409                 } else if (IS_DEVICE(mode)) {
 410                         if ((file->u.rdev & ~0xFF) == rdev_high)
 411                                 flags |= XMIT_SAME_HIGH_RDEV;
 412                         else {
 413                                 rdev = file->u.rdev;
 414                                 rdev_high = rdev & ~0xFF;
 415                         }
 416                 }
 417         }
 418         if (file->uid == uid)
 419                 flags |= XMIT_SAME_UID;
 420         else
 421                 uid = file->uid;
 422         if (file->gid == gid)
 423                 flags |= XMIT_SAME_GID;
 424         else
 425                 gid = file->gid;
 426         if (file->modtime == modtime)
 427                 flags |= XMIT_SAME_TIME;
 428         else
 429                 modtime = file->modtime;
 430 #if SUPPORT_HARD_LINKS
 431         if (file->link_u.idev) {
 432                 if (file->F_DEV == dev) {
 433                         if (protocol_version >= 28)
 434                                 flags |= XMIT_SAME_DEV;
 435                 } else
 436                         dev = file->F_DEV;
 437                 flags |= XMIT_HAS_IDEV_DATA;
 438         }
 439 #endif
 440
 441         for (l1 = 0;
 442              lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
 443              l1++) {}
 444         l2 = strlen(fname+l1);
 445
 446         if (l1 > 0)
 447                 flags |= XMIT_SAME_NAME;
 448         if (l2 > 255)
 449                 flags |= XMIT_LONG_NAME;
 450
 451         /* We must make sure we don't send a zero flag byte or the
 452          * other end will terminate the flist transfer.  Note that
 453          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
 454          * it's harmless way to add a bit to the first flag byte. */
 455         if (protocol_version >= 28) {
 456                 if (!flags && !S_ISDIR(mode))
 457                         flags |= XMIT_TOP_DIR;
 458                 if ((flags & 0xFF00) || !flags) {
 459                         flags |= XMIT_EXTENDED_FLAGS;
 460                         write_byte(f, flags);
 461                         write_byte(f, flags >> 8);
 462                 } else
 463                         write_byte(f, flags);
 464         } else {
 465                 if (!(flags & 0xFF) && !S_ISDIR(mode))
 466                         flags |= XMIT_TOP_DIR;
 467                 if (!(flags & 0xFF))
 468                         flags |= XMIT_LONG_NAME;
 469                 write_byte(f, flags);
 470         }
 471         if (flags & XMIT_SAME_NAME)
 472                 write_byte(f, l1);
 473         if (flags & XMIT_LONG_NAME)
 474                 write_int(f, l2);
 475         else
 476                 write_byte(f, l2);
 477         write_buf(f, fname + l1, l2);
 478
 479         write_longint(f, file->length);
 480         if (!(flags & XMIT_SAME_TIME))
 481                 write_int(f, modtime);
 482         if (!(flags & XMIT_SAME_MODE))
 483                 write_int(f, to_wire_mode(mode));
 484         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
 485                 add_uid(uid);
 486                 write_int(f, uid);
 487         }
 488         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
 489                 add_gid(gid);
 490                 write_int(f, gid);
 491         }
 492         if (preserve_devices && IS_DEVICE(mode)) {
 493                 /* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
 494                  * also off. */
 495                 if (!(flags & XMIT_SAME_HIGH_RDEV))
 496                         write_int(f, rdev);
 497                 else if (protocol_version >= 28)
 498                         write_byte(f, rdev);
 499         }
 500
 501 #if SUPPORT_LINKS
 502         if (preserve_links && S_ISLNK(mode)) {
 503                 int len = strlen(file->u.link);
 504                 write_int(f, len);
 505                 write_buf(f, file->u.link, len);
 506         }
 507 #endif
 508
 509 #if SUPPORT_HARD_LINKS
 510         if (flags & XMIT_HAS_IDEV_DATA) {
 511                 if (protocol_version < 26) {
 512                         /* 32-bit dev_t and ino_t */
 513                         write_int(f, dev);
 514                         write_int(f, file->F_INODE);
 515                 } else {
 516                         /* 64-bit dev_t and ino_t */
 517                         if (!(flags & XMIT_SAME_DEV))
 518                                 write_longint(f, dev);
 519                         write_longint(f, file->F_INODE);
 520                 }
 521         }
 522 #endif
 523
 524         if (always_checksum) {
 525                 char *sum;
 526                 if (S_ISREG(mode))
 527                         sum = file->u.sum;
 528                 else if (protocol_version < 28) {
 529                         /* Prior to 28, we sent a useless set of nulls. */
 530                         sum = empty_sum;
 531                 } else
 532                         sum = NULL;
 533                 if (sum) {
 534                         write_buf(f, sum, protocol_version < 21? 2
 535                                                         : MD4_SUM_LENGTH);
 536                 }
 537         }
 538
 539         strlcpy(lastname, fname, MAXPATHLEN);
 540
 541         io_write_phase = "unknown";
 542 }
 543
 544
 545
 546 void receive_file_entry(struct file_struct **fptr, unsigned short flags, int f)
 547 {
 548         static time_t modtime;
 549         static mode_t mode;
 550         static DEV64_T rdev, rdev_high;
 551         static DEV64_T dev;
 552         static uid_t uid;
 553         static gid_t gid;
 554         static char lastname[MAXPATHLEN];
 555         char thisname[MAXPATHLEN];
 556         unsigned int l1 = 0, l2 = 0;
 557         char *p;
 558         struct file_struct *file;
 559
 560         if (!fptr) {
 561                 modtime = 0, mode = 0;
 562                 rdev = 0, rdev_high = 0, dev = 0;
 563                 uid = 0, gid = 0;
 564                 *lastname = '\0';
 565                 return;
 566         }
 567
 568         if (flags & XMIT_SAME_NAME)
 569                 l1 = read_byte(f);
 570
 571         if (flags & XMIT_LONG_NAME)
 572                 l2 = read_int(f);
 573         else
 574                 l2 = read_byte(f);
 575
 576         file = new(struct file_struct);
 577         if (!file)
 578                 out_of_memory("receive_file_entry");
 579         memset((char *) file, 0, sizeof(*file));
 580         (*fptr) = file;
 581
 582         if (l2 >= MAXPATHLEN - l1) {
 583                 rprintf(FERROR,
 584                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
 585                         flags, l1, l2, lastname);
 586                 overflow("receive_file_entry");
 587         }
 588
 589         strlcpy(thisname, lastname, l1 + 1);
 590         read_sbuf(f, &thisname[l1], l2);
 591         thisname[l1 + l2] = 0;
 592
 593         strlcpy(lastname, thisname, MAXPATHLEN);
 594
 595         clean_fname(thisname);
 596
 597         if (sanitize_paths)
 598                 sanitize_path(thisname, NULL);
 599
 600         if ((p = strrchr(thisname, '/'))) {
 601                 static char *lastdir;
 602                 *p = 0;
 603                 if (lastdir && strcmp(thisname, lastdir) == 0)
 604                         file->dirname = lastdir;
 605                 else {
 606                         file->dirname = strdup(thisname);
 607                         lastdir = file->dirname;
 608                 }
 609                 file->basename = strdup(p + 1);
 610         } else {
 611                 file->dirname = NULL;
 612                 file->basename = strdup(thisname);
 613         }
 614
 615         if (!file->basename)
 616                 out_of_memory("receive_file_entry 1");
 617
 618         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
 619         file->length = read_longint(f);
 620         if (!(flags & XMIT_SAME_TIME))
 621                 modtime = (time_t)read_int(f);
 622         file->modtime = modtime;
 623         if (!(flags & XMIT_SAME_MODE))
 624                 mode = from_wire_mode(read_int(f));
 625         file->mode = mode;
 626
 627         if (preserve_uid) {
 628                 if (!(flags & XMIT_SAME_UID))
 629                         uid = (uid_t)read_int(f);
 630                 file->uid = uid;
 631         }
 632         if (preserve_gid) {
 633                 if (!(flags & XMIT_SAME_GID))
 634                         gid = (gid_t)read_int(f);
 635                 file->gid = gid;
 636         }
 637         if (preserve_devices) {
 638                 if (protocol_version < 28) {
 639                         if (IS_DEVICE(mode)) {
 640                                 if (!(flags & XMIT_SAME_RDEV_pre28))
 641                                         rdev = (DEV64_T)read_int(f);
 642                                 file->u.rdev = rdev;
 643                         } else
 644                                 rdev = 0;
 645                 } else if (IS_DEVICE(mode)) {
 646                         if (!(flags & XMIT_SAME_HIGH_RDEV)) {
 647                                 rdev = (DEV64_T)read_int(f);
 648                                 rdev_high = rdev & ~0xFF;
 649                         } else
 650                                 rdev = rdev_high | (DEV64_T)read_byte(f);
 651                         file->u.rdev = rdev;
 652                 }
 653         }
 654
 655 #if SUPPORT_LINKS
 656         if (preserve_links && S_ISLNK(mode)) {
 657                 int len = read_int(f);
 658                 if (len < 0 || len >= MAXPATHLEN) {
 659                         rprintf(FERROR, "overflow: len=%d\n", len);
 660                         overflow("receive_file_entry");
 661                 }
 662                 if (!(file->u.link = new_array(char, len + 1)))
 663                         out_of_memory("receive_file_entry 2");
 664                 read_sbuf(f, file->u.link, len);
 665                 if (sanitize_paths)
 666                         sanitize_path(file->u.link, file->dirname);
 667         }
 668 #endif
 669
 670 #if SUPPORT_HARD_LINKS
 671         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
 672                 flags |= XMIT_HAS_IDEV_DATA;
 673         if (flags & XMIT_HAS_IDEV_DATA) {
 674                 if (!(file->link_u.idev = new(struct idev)))
 675                         out_of_memory("file inode data");
 676                 if (protocol_version < 26) {
 677                         dev = read_int(f);
 678                         file->F_INODE = read_int(f);
 679                 } else {
 680                         if (!(flags & XMIT_SAME_DEV))
 681                                 dev = read_longint(f);
 682                         file->F_INODE = read_longint(f);
 683                 }
 684                 file->F_DEV = dev;
 685         }
 686 #endif
 687
 688         if (always_checksum) {
 689                 char *sum;
 690                 if (S_ISREG(mode)) {
 691                         sum = file->u.sum = new_array(char, MD4_SUM_LENGTH);
 692                         if (!sum)
 693                                 out_of_memory("md4 sum");
 694                 } else if (protocol_version < 28) {
 695                         /* Prior to 28, we get a useless set of nulls. */
 696                         sum = empty_sum;
 697                 } else
 698                         sum = NULL;
 699                 if (sum) {
 700                         read_buf(f, sum, protocol_version < 21? 2
 701                                                 : MD4_SUM_LENGTH);
 702                 }
 703         }
 704
 705         if (!preserve_perms) {
 706                 extern int orig_umask;
 707                 /* set an appropriate set of permissions based on original
 708                  * permissions and umask. This emulates what GNU cp does */
 709                 file->mode &= ~orig_umask;
 710         }
 711 }
 712
 713
 714 #define STRDUP(ap, p)   (ap ? string_area_strdup(ap, p) : strdup(p))
 715 /* IRIX cc cares that the operands to the ternary have the same type. */
 716 #define MALLOC(ap, i)   (ap ? (void*) string_area_malloc(ap, i) : malloc(i))
 717
 718 /**
 719  * Create a file_struct for a named file by reading its stat()
 720  * information and performing extensive checks against global
 721  * options.
 722  *
 723  * @return the new file, or NULL if there was an error or this file
 724  * should be excluded.
 725  *
 726  * @todo There is a small optimization opportunity here to avoid
 727  * stat()ing the file in some circumstances, which has a certain cost.
 728  * We are called immediately after doing readdir(), and so we may
 729  * already know the d_type of the file.  We could for example avoid
 730  * statting directories if we're not recursing, but this is not a very
 731  * important case.  Some systems may not have d_type.
 732  **/
 733 struct file_struct *make_file(char *fname, struct string_area **ap,
 734                               int exclude_level)
 735 {
 736         struct file_struct *file;
 737         STRUCT_STAT st;
 738         char sum[SUM_LENGTH];
 739         char *p;
 740         char thisname[MAXPATHLEN];
 741         char linkname[MAXPATHLEN];
 742         unsigned short flags = 0;
 743
 744         if (strlcpy(thisname, fname, sizeof thisname)
 745             >= sizeof thisname - flist_dir_len) {
 746                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
 747                 return NULL;
 748         }
 749         clean_fname(thisname);
 750         if (sanitize_paths)
 751                 sanitize_path(thisname, NULL);
 752
 753         memset(sum, 0, SUM_LENGTH);
 754
 755         if (readlink_stat(thisname, &st, linkname) != 0) {
 756                 int save_errno = errno;
 757                 if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
 758                         /* either symlink pointing nowhere or file that
 759                          * was removed during rsync run; see if excluded
 760                          * before reporting an error */
 761                         if (check_exclude_file(thisname, 0, exclude_level)) {
 762                                 /* file is excluded anyway, ignore silently */
 763                                 return NULL;
 764                         }
 765                 }
 766                 io_error |= IOERR_GENERAL;
 767                 rprintf(FERROR, "readlink %s failed: %s\n",
 768                         full_fname(thisname), strerror(save_errno));
 769                 return NULL;
 770         }
 771
 772         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
 773         if (exclude_level == NO_EXCLUDES)
 774                 goto skip_excludes;
 775
 776         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
 777                 rprintf(FINFO, "skipping directory %s\n", thisname);
 778                 return NULL;
 779         }
 780
 781         if (one_file_system && st.st_dev != filesystem_dev) {
 782                 /* We allow a directory though to preserve the mount point.
 783                  * However, flag it so that we don't recurse. */
 784                 if (!S_ISDIR(st.st_mode))
 785                         return NULL;
 786                 flags |= FLAG_MOUNT_POINT;
 787         }
 788
 789         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
 790                 return NULL;
 791
 792         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
 793                 return NULL;
 794
 795       skip_excludes:
 796
 797         if (verbose > 2) {
 798                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
 799                         who_am_i(), thisname, exclude_level);
 800         }
 801
 802         file = new(struct file_struct);
 803         if (!file)
 804                 out_of_memory("make_file");
 805         memset((char *) file, 0, sizeof(*file));
 806         file->flags = flags;
 807
 808         if ((p = strrchr(thisname, '/'))) {
 809                 static char *lastdir;
 810                 *p = 0;
 811                 if (lastdir && strcmp(thisname, lastdir) == 0)
 812                         file->dirname = lastdir;
 813                 else {
 814                         file->dirname = strdup(thisname);
 815                         lastdir = file->dirname;
 816                 }
 817                 file->basename = STRDUP(ap, p + 1);
 818                 *p = '/';
 819         } else {
 820                 file->dirname = NULL;
 821                 file->basename = STRDUP(ap, thisname);
 822         }
 823
 824         file->modtime = st.st_mtime;
 825         file->length = st.st_size;
 826         file->mode = st.st_mode;
 827         file->uid = st.st_uid;
 828         file->gid = st.st_gid;
 829
 830 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 831         if (preserve_devices && IS_DEVICE(st.st_mode))
 832                 file->u.rdev = st.st_rdev;
 833 #endif
 834
 835 #if SUPPORT_LINKS
 836         if (S_ISLNK(st.st_mode))
 837                 file->u.link = STRDUP(ap, linkname);
 838 #endif
 839
 840 #if SUPPORT_HARD_LINKS
 841         if (preserve_hard_links) {
 842                 if (protocol_version < 28 ? S_ISREG(st.st_mode)
 843                     : !S_ISDIR(st.st_mode) && st.st_nlink > 1) {
 844                         if (!(file->link_u.idev = new(struct idev)))
 845                                 out_of_memory("file inode data");
 846                         file->F_DEV = st.st_dev;
 847                         file->F_INODE = st.st_ino;
 848                 }
 849         }
 850 #endif
 851
 852         if (always_checksum && S_ISREG(st.st_mode)) {
 853                 if (!(file->u.sum = (char*)MALLOC(ap, MD4_SUM_LENGTH)))
 854                         out_of_memory("md4 sum");
 855                 file_checksum(thisname, file->u.sum, st.st_size);
 856         }
 857
 858         file->basedir = flist_dir;
 859
 860         if (!S_ISDIR(st.st_mode))
 861                 stats.total_size += st.st_size;
 862
 863         return file;
 864 }
 865
 866
 867 void send_file_name(int f, struct file_list *flist, char *fname,
 868                     int recursive, unsigned short base_flags)
 869 {
 870         struct file_struct *file;
 871         char fbuf[MAXPATHLEN];
 872         extern int delete_excluded;
 873
 874         /* f is set to -1 when calculating deletion file list */
 875         file = make_file(fname, &flist->string_area,
 876                          f == -1 && delete_excluded? SERVER_EXCLUDES
 877                                                    : ALL_EXCLUDES);
 878
 879         if (!file)
 880                 return;
 881
 882         maybe_emit_filelist_progress(flist);
 883
 884         flist_expand(flist);
 885
 886         if (write_batch)
 887                 file->flags |= FLAG_TOP_DIR;
 888
 889         if (file->basename[0]) {
 890                 flist->files[flist->count++] = file;
 891                 send_file_entry(file, f, base_flags);
 892         }
 893
 894         if (recursive && S_ISDIR(file->mode)
 895             && !(file->flags & FLAG_MOUNT_POINT)) {
 896                 struct exclude_struct **last_exclude_list = local_exclude_list;
 897                 send_directory(f, flist, f_name_to(file, fbuf));
 898                 local_exclude_list = last_exclude_list;
 899                 return;
 900         }
 901 }
 902
 903
 904 static void send_directory(int f, struct file_list *flist, char *dir)
 905 {
 906         DIR *d;
 907         struct dirent *di;
 908         char fname[MAXPATHLEN];
 909         unsigned int offset;
 910         char *p;
 911
 912         d = opendir(dir);
 913         if (!d) {
 914                 io_error |= IOERR_GENERAL;
 915                 rprintf(FERROR, "opendir %s failed: %s\n",
 916                         full_fname(dir), strerror(errno));
 917                 return;
 918         }
 919
 920         offset = strlcpy(fname, dir, MAXPATHLEN);
 921         p = fname + offset;
 922         if (offset >= MAXPATHLEN || p[-1] != '/') {
 923                 if (offset >= MAXPATHLEN - 1) {
 924                         io_error |= IOERR_GENERAL;
 925                         rprintf(FERROR, "skipping long-named directory: %s\n",
 926                                 full_fname(fname));
 927                         closedir(d);
 928                         return;
 929                 }
 930                 *p++ = '/';
 931                 offset++;
 932         }
 933
 934         local_exclude_list = NULL;
 935
 936         if (cvs_exclude) {
 937                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
 938                     < MAXPATHLEN - offset)
 939                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 940                 else {
 941                         io_error |= IOERR_GENERAL;
 942                         rprintf(FINFO,
 943                                 "cannot cvs-exclude in long-named directory %s\n",
 944                                 full_fname(fname));
 945                 }
 946         }
 947
 948         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 949                 char *dname = d_name(di);
 950                 if (dname[0] == '.' && (dname[1] == '\0'
 951                     || (dname[1] == '.' && dname[2] == '\0')))
 952                         continue;
 953                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
 954                         send_file_name(f, flist, fname, recurse, 0);
 955                 else {
 956                         io_error |= IOERR_GENERAL;
 957                         rprintf(FINFO,
 958                                 "cannot send long-named file %s\n",
 959                                 full_fname(fname));
 960                 }
 961         }
 962         if (errno) {
 963                 io_error |= IOERR_GENERAL;
 964                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
 965                         dir, errno, strerror(errno));
 966         }
 967
 968         if (local_exclude_list)
 969                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
 970
 971         closedir(d);
 972 }
 973
 974
 975 /**
 976  * The delete_files() function in receiver.c sets f to -1 so that we just
 977  * construct the file list in memory without sending it over the wire.  It
 978  * also has the side-effect of ignoring user-excludes if delete_excluded
 979  * is set (so that the delete list includes user-excluded files).
 980  **/
 981 struct file_list *send_file_list(int f, int argc, char *argv[])
 982 {
 983         int l;
 984         STRUCT_STAT st;
 985         char *p, *dir, olddir[sizeof curr_dir];
 986         char lastpath[MAXPATHLEN] = "";
 987         struct file_list *flist;
 988         int64 start_write;
 989         int use_ff_fd = 0;
 990
 991         if (show_filelist_p() && f != -1)
 992                 start_filelist_progress("building file list");
 993
 994         start_write = stats.total_written;
 995
 996         flist = flist_new();
 997
 998         if (f != -1) {
 999                 io_start_buffering_out(f);
1000                 if (filesfrom_fd >= 0) {
1001                         if (argv[0] && !push_dir(argv[0])) {
1002                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1003                                         full_fname(argv[0]), strerror(errno));
1004                                 exit_cleanup(RERR_FILESELECT);
1005                         }
1006                         use_ff_fd = 1;
1007                 }
1008         }
1009
1010         while (1) {
1011                 char fname2[MAXPATHLEN];
1012                 char *fname = fname2;
1013
1014                 if (use_ff_fd) {
1015                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1016                                 break;
1017                         sanitize_path(fname, NULL);
1018                 } else {
1019                         if (argc-- == 0)
1020                                 break;
1021                         strlcpy(fname, *argv++, MAXPATHLEN);
1022                         if (sanitize_paths)
1023                                 sanitize_path(fname, NULL);
1024                 }
1025
1026                 l = strlen(fname);
1027                 if (fname[l - 1] == '/') {
1028                         if (l == 2 && fname[0] == '.') {
1029                                 /* Turn "./" into just "." rather than "./." */
1030                                 fname[1] = '\0';
1031                         } else if (l < MAXPATHLEN) {
1032                                 fname[l++] = '.';
1033                                 fname[l] = '\0';
1034                         }
1035                 }
1036
1037                 if (link_stat(fname, &st) != 0) {
1038                         if (f != -1) {
1039                                 io_error |= IOERR_GENERAL;
1040                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1041                                         full_fname(fname), strerror(errno));
1042                         }
1043                         continue;
1044                 }
1045
1046                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1047                         rprintf(FINFO, "skipping directory %s\n", fname);
1048                         continue;
1049                 }
1050
1051                 dir = NULL;
1052                 olddir[0] = '\0';
1053
1054                 if (!relative_paths) {
1055                         p = strrchr(fname, '/');
1056                         if (p) {
1057                                 *p = 0;
1058                                 if (p == fname)
1059                                         dir = "/";
1060                                 else
1061                                         dir = fname;
1062                                 fname = p + 1;
1063                         }
1064                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1065                         /* this ensures we send the intermediate directories,
1066                            thus getting their permissions right */
1067                         char *lp = lastpath, *fn = fname, *slash = fname;
1068                         *p = 0;
1069                         /* Skip any initial directories in our path that we
1070                          * have in common with lastpath. */
1071                         while (*fn && *lp == *fn) {
1072                                 if (*fn == '/')
1073                                         slash = fn;
1074                                 lp++, fn++;
1075                         }
1076                         *p = '/';
1077                         if (fn != p || (*lp && *lp != '/')) {
1078                                 int copy_links_saved = copy_links;
1079                                 int recurse_saved = recurse;
1080                                 copy_links = copy_unsafe_links;
1081                                 /* set recurse to 1 to prevent make_file
1082                                  * from ignoring directory, but still
1083                                  * turn off the recursive parameter to
1084                                  * send_file_name */
1085                                 recurse = 1;
1086                                 while ((slash = strchr(slash+1, '/')) != 0) {
1087                                         *slash = 0;
1088                                         send_file_name(f, flist, fname, 0, 0);
1089                                         *slash = '/';
1090                                 }
1091                                 copy_links = copy_links_saved;
1092                                 recurse = recurse_saved;
1093                                 *p = 0;
1094                                 strlcpy(lastpath, fname, sizeof lastpath);
1095                                 *p = '/';
1096                         }
1097                 }
1098
1099                 if (!*fname)
1100                         fname = ".";
1101
1102                 if (dir && *dir) {
1103                         static char *lastdir;
1104                         static int lastdir_len;
1105
1106                         strcpy(olddir, curr_dir); /* can't overflow */
1107
1108                         if (!push_dir(dir)) {
1109                                 io_error |= IOERR_GENERAL;
1110                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1111                                         full_fname(dir), strerror(errno));
1112                                 continue;
1113                         }
1114
1115                         if (lastdir && strcmp(lastdir, dir) == 0) {
1116                                 flist_dir = lastdir;
1117                                 flist_dir_len = lastdir_len;
1118                         } else {
1119                                 flist_dir = lastdir = strdup(dir);
1120                                 flist_dir_len = lastdir_len = strlen(dir);
1121                         }
1122                 }
1123
1124                 if (one_file_system)
1125                         set_filesystem(fname);
1126
1127                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1128
1129                 if (olddir[0]) {
1130                         flist_dir = NULL;
1131                         flist_dir_len = 0;
1132                         if (!pop_dir(olddir)) {
1133                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1134                                         full_fname(dir), strerror(errno));
1135                                 exit_cleanup(RERR_FILESELECT);
1136                         }
1137                 }
1138         }
1139
1140         if (f != -1) {
1141                 send_file_entry(NULL, f, 0);
1142
1143                 if (show_filelist_p())
1144                         finish_filelist_progress(flist);
1145         }
1146
1147         clean_flist(flist, 0, 0);
1148
1149         if (f != -1) {
1150                 /* Now send the uid/gid list. This was introduced in
1151                  * protocol version 15 */
1152                 send_uid_list(f);
1153
1154                 /* send the io_error flag */
1155                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1156
1157                 io_end_buffering();
1158                 stats.flist_size = stats.total_written - start_write;
1159                 stats.num_files = flist->count;
1160                 if (write_batch)
1161                         write_batch_flist_info(flist->count, flist->files);
1162         }
1163
1164         if (verbose > 2)
1165                 rprintf(FINFO, "send_file_list done\n");
1166
1167         return flist;
1168 }
1169
1170
1171 struct file_list *recv_file_list(int f)
1172 {
1173         struct file_list *flist;
1174         unsigned short flags;
1175         int64 start_read;
1176         extern int list_only;
1177
1178         if (show_filelist_p())
1179                 start_filelist_progress("receiving file list");
1180
1181         start_read = stats.total_read;
1182
1183         flist = new(struct file_list);
1184         if (!flist)
1185                 goto oom;
1186
1187         flist->count = 0;
1188         flist->malloced = 1000;
1189         flist->files = new_array(struct file_struct *, flist->malloced);
1190         if (!flist->files)
1191                 goto oom;
1192
1193
1194         while ((flags = read_byte(f)) != 0) {
1195                 int i = flist->count;
1196
1197                 flist_expand(flist);
1198
1199                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1200                         flags |= read_byte(f) << 8;
1201                 receive_file_entry(&flist->files[i], flags, f);
1202
1203                 if (S_ISREG(flist->files[i]->mode))
1204                         stats.total_size += flist->files[i]->length;
1205
1206                 flist->count++;
1207
1208                 maybe_emit_filelist_progress(flist);
1209
1210                 if (verbose > 2) {
1211                         rprintf(FINFO, "recv_file_name(%s)\n",
1212                                 f_name(flist->files[i]));
1213                 }
1214         }
1215         receive_file_entry(NULL, 0, 0); /* Signal that we're done. */
1216
1217         if (verbose > 2)
1218                 rprintf(FINFO, "received %d names\n", flist->count);
1219
1220         if (show_filelist_p())
1221                 finish_filelist_progress(flist);
1222
1223         clean_flist(flist, relative_paths, 1);
1224
1225         if (f != -1) {
1226                 /* Now send the uid/gid list. This was introduced in
1227                  * protocol version 15 */
1228                 recv_uid_list(f, flist);
1229
1230                 if (!read_batch) {
1231                         /* Recv the io_error flag */
1232                         if (lp_ignore_errors(module_id) || ignore_errors)
1233                                 read_int(f);
1234                         else
1235                                 io_error |= read_int(f);
1236                 }
1237         }
1238
1239         if (list_only) {
1240                 int i;
1241                 for (i = 0; i < flist->count; i++)
1242                         list_file_entry(flist->files[i]);
1243         }
1244
1245         if (verbose > 2)
1246                 rprintf(FINFO, "recv_file_list done\n");
1247
1248         stats.flist_size = stats.total_read - start_read;
1249         stats.num_files = flist->count;
1250
1251         return flist;
1252
1253       oom:
1254         out_of_memory("recv_file_list");
1255         return NULL;            /* not reached */
1256 }
1257
1258
1259 int file_compare(struct file_struct **file1, struct file_struct **file2)
1260 {
1261         struct file_struct *f1 = *file1;
1262         struct file_struct *f2 = *file2;
1263
1264         if (!f1->basename && !f2->basename)
1265                 return 0;
1266         if (!f1->basename)
1267                 return -1;
1268         if (!f2->basename)
1269                 return 1;
1270         if (f1->dirname == f2->dirname)
1271                 return u_strcmp(f1->basename, f2->basename);
1272         return f_name_cmp(f1, f2);
1273 }
1274
1275
1276 int flist_find(struct file_list *flist, struct file_struct *f)
1277 {
1278         int low = 0, high = flist->count - 1;
1279
1280         while (high >= 0 && !flist->files[high]->basename) high--;
1281
1282         if (high < 0)
1283                 return -1;
1284
1285         while (low != high) {
1286                 int mid = (low + high) / 2;
1287                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1288                 if (ret == 0)
1289                         return flist_up(flist, mid);
1290                 if (ret > 0)
1291                         high = mid;
1292                 else
1293                         low = mid + 1;
1294         }
1295
1296         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1297                 return flist_up(flist, low);
1298         return -1;
1299 }
1300
1301
1302 /*
1303  * free up one file
1304  */
1305 void free_file(struct file_struct *file)
1306 {
1307         if (!file)
1308                 return;
1309         if (file->basename)
1310                 free(file->basename);
1311         if (!IS_DEVICE(file->mode) && file->u.sum)
1312                 free(file->u.sum); /* Handles u.link too. */
1313 #if SUPPORT_HARD_LINKS
1314         if (file->link_u.idev)
1315                 free((char*)file->link_u.idev); /* Handles link_u.links too. */
1316 #endif
1317         *file = null_file;
1318 }
1319
1320
1321 /*
1322  * allocate a new file list
1323  */
1324 struct file_list *flist_new(void)
1325 {
1326         struct file_list *flist;
1327
1328         flist = new(struct file_list);
1329         if (!flist)
1330                 out_of_memory("send_file_list");
1331
1332         flist->count = 0;
1333         flist->malloced = 0;
1334         flist->files = NULL;
1335
1336 #if ARENA_SIZE > 0
1337         flist->string_area = string_area_new(0);
1338 #else
1339         flist->string_area = NULL;
1340 #endif
1341         return flist;
1342 }
1343
1344 /*
1345  * free up all elements in a flist
1346  */
1347 void flist_free(struct file_list *flist)
1348 {
1349         int i;
1350         for (i = 1; i < flist->count; i++) {
1351                 if (!flist->string_area)
1352                         free_file(flist->files[i]);
1353                 free(flist->files[i]);
1354         }
1355         /* FIXME: I don't think we generally need to blank the flist
1356          * since it's about to be freed.  This will just cause more
1357          * memory traffic.  If you want a freed-memory debugger, you
1358          * know where to get it. */
1359         memset((char *) flist->files, 0,
1360                sizeof(flist->files[0]) * flist->count);
1361         free(flist->files);
1362         if (flist->string_area)
1363                 string_area_free(flist->string_area);
1364         memset((char *) flist, 0, sizeof(*flist));
1365         free(flist);
1366 }
1367
1368
1369 /*
1370  * This routine ensures we don't have any duplicate names in our file list.
1371  * duplicate names can cause corruption because of the pipelining
1372  */
1373 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1374 {
1375         int i, prev_i = 0;
1376
1377         if (!flist || flist->count == 0)
1378                 return;
1379
1380         qsort(flist->files, flist->count,
1381               sizeof(flist->files[0]), (int (*)()) file_compare);
1382
1383         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1384                 if (flist->files[i]->basename) {
1385                         prev_i = i;
1386                         break;
1387                 }
1388         }
1389         while (++i < flist->count) {
1390                 if (!flist->files[i]->basename)
1391                         continue;
1392                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1393                         if (verbose > 1 && !am_server) {
1394                                 rprintf(FINFO,
1395                                         "removing duplicate name %s from file list %d\n",
1396                                         f_name(flist->files[i]), i);
1397                         }
1398                         /* Make sure that if we unduplicate '.', that we don't
1399                          * lose track of a user-specified starting point (or
1400                          * else deletions will mysteriously fail with -R). */
1401                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1402                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1403                         /* it's not great that the flist knows the semantics of
1404                          * the file memory usage, but i'd rather not add a flag
1405                          * byte to that struct.
1406                          * XXX can i use a bit in the flags field? */
1407                         if (flist->string_area)
1408                                 flist->files[i][0] = null_file;
1409                         else
1410                                 free_file(flist->files[i]);
1411                 } else
1412                         prev_i = i;
1413         }
1414
1415         if (strip_root) {
1416                 /* we need to strip off the root directory in the case
1417                    of relative paths, but this must be done _after_
1418                    the sorting phase */
1419                 for (i = 0; i < flist->count; i++) {
1420                         if (flist->files[i]->dirname &&
1421                             flist->files[i]->dirname[0] == '/') {
1422                                 memmove(&flist->files[i]->dirname[0],
1423                                         &flist->files[i]->dirname[1],
1424                                         strlen(flist->files[i]->dirname));
1425                         }
1426
1427                         if (flist->files[i]->dirname &&
1428                             !flist->files[i]->dirname[0]) {
1429                                 flist->files[i]->dirname = NULL;
1430                         }
1431                 }
1432         }
1433
1434         if (verbose <= 3)
1435                 return;
1436
1437         for (i = 0; i < flist->count; i++) {
1438                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f\n",
1439                         who_am_i(), i,
1440                         NS(flist->files[i]->basedir),
1441                         NS(flist->files[i]->dirname),
1442                         NS(flist->files[i]->basename),
1443                         (int) flist->files[i]->mode,
1444                         (double) flist->files[i]->length);
1445         }
1446 }
1447
1448
1449 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1450
1451 /* Compare the names of two file_struct entities, just like strcmp()
1452  * would do if it were operating on the joined strings.  We assume
1453  * that there are no 0-length strings.
1454  */
1455 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1456 {
1457         int dif;
1458         const uchar *c1, *c2;
1459         enum fnc_state state1, state2;
1460
1461         if (!f1 || !f1->basename) {
1462                 if (!f2 || !f2->basename)
1463                         return 0;
1464                 return -1;
1465         }
1466         if (!f2 || !f2->basename)
1467                 return 1;
1468
1469         if (!(c1 = (uchar*)f1->dirname)) {
1470                 state1 = fnc_BASE;
1471                 c1 = (uchar*)f1->basename;
1472         } else
1473                 state1 = fnc_DIR;
1474         if (!(c2 = (uchar*)f2->dirname)) {
1475                 state2 = fnc_BASE;
1476                 c2 = (uchar*)f2->basename;
1477         } else
1478                 state2 = fnc_DIR;
1479
1480         while (1) {
1481                 if ((dif = (int)*c1 - (int)*c2) != 0)
1482                         break;
1483                 if (!*++c1) {
1484                         switch (state1) {
1485                         case fnc_DIR:
1486                                 state1 = fnc_SLASH;
1487                                 c1 = (uchar*)"/";
1488                                 break;
1489                         case fnc_SLASH:
1490                                 state1 = fnc_BASE;
1491                                 c1 = (uchar*)f1->basename;
1492                                 break;
1493                         case fnc_BASE:
1494                                 break;
1495                         }
1496                 }
1497                 if (!*++c2) {
1498                         switch (state2) {
1499                         case fnc_DIR:
1500                                 state2 = fnc_SLASH;
1501                                 c2 = (uchar*)"/";
1502                                 break;
1503                         case fnc_SLASH:
1504                                 state2 = fnc_BASE;
1505                                 c2 = (uchar*)f2->basename;
1506                                 break;
1507                         case fnc_BASE:
1508                                 if (!*c1)
1509                                         return 0;
1510                                 break;
1511                         }
1512                 }
1513         }
1514
1515         return dif;
1516 }
1517
1518
1519 /* Return a copy of the full filename of a flist entry, using the indicated
1520  * buffer.  No size-checking is done because we checked the size when creating
1521  * the file_struct entry.
1522  */
1523 char *f_name_to(struct file_struct *f, char *fbuf)
1524 {
1525         if (!f || !f->basename)
1526                 return NULL;
1527
1528         if (f->dirname) {
1529                 int len = strlen(f->dirname);
1530                 memcpy(fbuf, f->dirname, len);
1531                 fbuf[len] = '/';
1532                 strcpy(fbuf + len + 1, f->basename);
1533         } else
1534                 strcpy(fbuf, f->basename);
1535         return fbuf;
1536 }
1537
1538
1539 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1540  */
1541 char *f_name(struct file_struct *f)
1542 {
1543         static char names[5][MAXPATHLEN];
1544         static unsigned int n;
1545
1546         n = (n + 1) % (sizeof names / sizeof names[0]);
1547
1548         return f_name_to(f, names[n]);
1549 }