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